阅读说明：本技术 负载系统、负载试验装置和通信终端 (Load system, load test device and communication terminal ) 是由 近藤丰嗣 于 2017-05-16 设计创作，主要内容包括：提供一种负载系统等,使位于远程位置的作业者能够掌握负载试验装置的状态,或者能够对其进行操作。负载系统包括：第一负载试验装置；以及通信终端(69),用于与第一负载试验装置进行无线通信。第一负载试验装置具有用于与通信终端(69)进行无线通信的第一通信部。第一通信部向通信终端(69)发送与第一负载试验装置的接通断开状态有关的信息,从通信终端(69)接收与操作第一负载试验装置的指令有关的信号。(Provided is a load system or the like which enables an operator at a remote location to grasp the state of a load testing device or to operate the load testing device. The load system includes: a first load test device; and a communication terminal (69) for performing wireless communication with the first load testing device. The first load test device has a first communication unit for performing wireless communication with a communication terminal (69). The first communication unit transmits information on the on/off state of the first load testing device to the communication terminal (69), and receives a signal on a command for operating the first load testing device from the communication terminal (69).)

1. A load system, comprising:

a first load test device; and

a communication terminal for performing wireless communication with the first load testing device,

the first load test device has a first communication unit for performing wireless communication with the communication terminal,

the first communication unit transmits information on an on/off state of the first load testing device to the communication terminal, and receives a signal on an instruction to operate the first load testing device from the communication terminal.

2. The load system according to claim 1, wherein software for displaying an ON-OFF state display pattern is installed in the communication terminal,

the on-off state display pattern includes: a relay on/off state display area for displaying an on/off state of a relay in the first load test apparatus; and a load test state display area for displaying a state of a load test of the first load test device,

switching of the on-off state of the relay in the first load test apparatus is performed in correspondence with an operation of the relay on-off state display area.

3. The load system according to claim 2, wherein the first load testing device includes a first resistance portion provided with a plurality of resistor groups having resistors,

when the communication between the first communication unit and the communication terminal is cut off, at least one of the relays in an on state is turned off among the relays of the first load test apparatus corresponding to the plurality of resistor groups of the first resistance unit.

4. The load system according to claim 2, wherein the first load testing device includes a first resistance portion provided with a plurality of resistor groups having resistors,

when the communication between the first communication section and the communication terminal is cut off, some of the relays in the on state are gradually brought to the off state among the relays corresponding to the plurality of resistor groups of the first resistance section among the relays of the first load test apparatus.

5. The load system according to claim 4, wherein after the communication is cut off and before all the relays of the first load test device corresponding to the plurality of resistor groups are brought into the off state, if the communication is resumed, the control of gradually changing to the off state is stopped, and the communication terminal displays information on resumption of the communication.

6. A load system, comprising:

a first load test device;

a second load testing device separate from the first load testing device; and

a communication terminal for performing wireless communication with the first load testing device and the second load testing device,

the first load test device has a first communication unit for performing wireless communication with the communication terminal,

the second load test device has a second communication unit for performing wireless communication with the communication terminal,

the first communication unit transmits information on an on/off state of the first load testing device to the communication terminal, receives a signal on an instruction to operate the first load testing device from the communication terminal,

the second communication unit transmits information on the on/off state of the second load testing device to the communication terminal, and receives a signal on an instruction to operate the second load testing device from the communication terminal.

7. The load system according to claim 6, wherein software for displaying a first ON-OFF state display pattern and a second ON-OFF state display pattern is installed in the communication terminal,

the first on-off state display pattern includes: a first relay on-off state display area for displaying an on-off state of a relay in the first load test apparatus; and a first load test state display area for displaying a state of a load test of the first load test apparatus,

the second on-off state display pattern includes: a second relay on/off state display area for displaying an on/off state of a relay in the second load test apparatus; and a second load test state display area for displaying a state of a load test of the second load test apparatus,

switching of the on-off state of the relay in the first load test apparatus is performed in correspondence with an operation of the first relay on-off state display area,

switching of the on-off state of the relay in the second load test apparatus is performed in correspondence with the operation of the second relay on-off state display area,

the state of the load test of the first load test device includes at least one of information related to current, information related to voltage, information related to power, information related to a load amount, information related to test time, and information related to whether or not to operate normally in the load test of the first load test device,

the state of the load test of the second load test device includes at least one of information related to current, information related to voltage, information related to power, information related to a load amount, information related to test time, and information related to whether or not normal operation is performed in the load test of the second load test device.

8. The load system according to claim 7, wherein the first load testing device includes a first resistance portion provided with a plurality of resistor groups having resistors,

the second load test device includes a second resistance portion provided with a plurality of resistor groups having resistors,

causing at least one of the relays in an on state to be in an off state among the relays of the first load testing apparatus corresponding to the plurality of resistor groups of the first resistance section when the communication between the first communication section and the communication terminal is cut off,

when the communication between the second communication unit and the communication terminal is cut off, at least one of the relays in an on state is turned off among the relays of the second load testing apparatus corresponding to the plurality of resistor groups of the second resistance unit.

9. The load system of claim 7, wherein the software is further configured to display a historical display pattern,

the history display pattern includes: an in-progress display area that indicates a state of a load test by the first load test apparatus and a state of a load test by the second load test apparatus; and a past display area showing contents of past load tests of the first load test device and the second load test device,

the contents of the past load tests in the past display area include information on the date and time of the past load tests,

switching to display the first on-off state display pattern when a region indicating a state of a load test of the first load test apparatus is operated in the in-progress display region,

and switching to display the second on/off state display pattern when a region indicating a state of the load test of the second load test apparatus is operated in the in-progress display region.

10. A load test device includes a first communication unit for performing wireless communication with a communication terminal,

the first communication unit transmits information on an on/off state of the first load testing device to the communication terminal, and receives a signal on an instruction to operate the first load testing device from the communication terminal.

11. A communication terminal for wireless communication with a first load testing device,

the first load test device includes a first communication unit for performing wireless communication with the communication terminal,

the communication terminal receives information on the on/off state of the first load testing device from the first communication unit, and transmits a signal related to an instruction to operate the first load testing device to the first communication unit.

Technical Field

The present invention relates to a load system and the like.

Background

Conventionally, a dry load test device for performing a load test of a generator as described in patent document 1 is known.

Patent document 1: japanese laid-open patent publication No. 2010-25752

Disclosure of Invention

However, an operator located at a remote location from the load testing apparatus cannot grasp the state of the load testing apparatus and cannot operate the load testing apparatus.

Therefore, an object of the present invention is to provide a load system or the like that enables an operator at a remote location to grasp the state of a load testing device or to operate the load testing device.

The load system of the present invention includes: a first load test device; and a communication terminal for performing wireless communication with the first load testing device, wherein the first load testing device has a first communication unit for performing wireless communication with the communication terminal, and the first communication unit transmits information about an on/off state of the first load testing device to the communication terminal and receives a signal about an instruction to operate the first load testing device from the communication terminal.

By using a communication terminal for communicating with the load testing device, an operator located at a remote location from the load testing device can grasp the state of the load testing device and can operate the load testing device.

Preferably, software for displaying an on-off state display pattern is installed in the communication terminal, the on-off state display pattern including: a relay on/off state display area for displaying an on/off state of a relay in the first load test apparatus; and a load test state display area for displaying a state of a load test of the first load test apparatus, and switching the on/off state of the relay in the first load test apparatus in accordance with an operation of the relay on/off state display area.

Further preferably, the first load test apparatus includes a first resistance portion provided with a plurality of resistor groups having resistors, and at least one of the relays in an on state is brought into an off state in the relay corresponding to the plurality of resistor groups of the first resistance portion among the relays of the first load test apparatus when communication between the first communication portion and the communication terminal is cut off.

When the communication between the communication unit and the communication terminal is disconnected, the load state of the load testing device and the like cannot be controlled by the operation of the communication terminal, but the load can be reduced based on the disconnection of the communication, and the safety of the load testing device can be ensured.

Preferably, the first load test apparatus includes a first resistance portion provided with a plurality of resistor groups having resistors, and some of the relays in an on state are gradually changed to an off state in the relays corresponding to the plurality of resistor groups of the first resistance portion among the relays of the first load test apparatus when communication between the first communication portion and the communication terminal is cut off.

Further preferably, after the communication is cut off and before all the relays of the first load test apparatus corresponding to the plurality of resistor groups are brought into the off state, if the communication is resumed, the control of gradually changing to the off state is stopped, and the communication terminal displays information on resumption of the communication.

The load system of the present invention includes: a first load test device; a second load testing device separate from the first load testing device; and a communication terminal for performing wireless communication with the first load testing device and the second load testing device, wherein the first load testing device has a first communication unit for performing wireless communication with the communication terminal, the second load testing device has a second communication unit for performing wireless communication with the communication terminal, the first communication unit transmits information on an on/off state of the first load testing device to the communication terminal, and receives a signal on a command for operating the first load testing device from the communication terminal, and the second communication unit transmits information on an on/off state of the second load testing device to the communication terminal, and receives a signal on a command for operating the second load testing device from the communication terminal.

The communication terminal communicates with the plurality of load test apparatuses 1 and operates the plurality of load test apparatuses, whereby the states of the plurality of load test apparatuses can be simultaneously displayed on a single communication terminal and the plurality of load test apparatuses can be operated by a single operator.

The present invention is particularly effective when a plurality of load test apparatuses 1 are provided to perform a load test of an air conditioning system.

Preferably, software for displaying a first on-off state display pattern and a second on-off state display pattern is installed in the communication terminal, and the first on-off state display pattern includes: a first relay on-off state display area for displaying an on-off state of a relay in the first load test apparatus; and a first load test state display area for displaying a state of a load test of the first load test apparatus, the second on-off state display pattern including: a second relay on/off state display area for displaying an on/off state of a relay in the second load test apparatus; and a second load test state display area for displaying a state of a load test of the second load test apparatus, the switching of the on-off state of the relay in the first load test apparatus being performed in correspondence with an operation of the first relay on-off state display area, the switching of the on-off state of the relay in the second load test apparatus being performed in correspondence with an operation of the second relay on-off state display area, the state of the load test of the first load test apparatus including at least one of information related to a current, information related to a voltage, information related to a power, information related to a load amount, information related to a test time, and information related to whether or not to operate normally in the load test of the first load test apparatus, the state of the load test of the second load test apparatus including a state of the load test in the second load test apparatus At least one of information related to current, information related to voltage, information related to power, information related to load amount, information related to trial time, and information related to whether or not normal operation is performed.

Further preferably, the first load test apparatus includes a first resistance portion provided with a plurality of resistor groups having resistors, the second load test apparatus includes a second resistance portion provided with a plurality of resistor groups having resistors, at least one of the relays in an on state among the relays of the first load test apparatus corresponding to the plurality of resistor groups of the first resistance portion is made to be in an off state when communication between the first communication portion and the communication terminal is cut off, and among the relays in the second load test apparatus corresponding to the plurality of resistor groups of the second resistance portion when communication between the second communication portion and the communication terminal is cut off, causing at least one of the relays in the on state to become the off state.

Preferably, the software is further configured to display a history display pattern, the history display pattern comprising: an in-progress display area that indicates a state of a load test by the first load test apparatus and a state of a load test by the second load test apparatus; and a past display area that displays contents of past load tests of the first load testing device and the second load testing device, wherein the contents of the past load tests in the past display area include information on dates and times of the past load tests, and the display mode is switched to display the first on/off state display pattern when an area that indicates a state of a load test of the first load testing device is operated in the ongoing display area, and the display mode is switched to display the second on/off state display pattern when an area that indicates a state of a load test of the second load testing device is operated in the ongoing display area.

The load testing device of the present invention includes a first communication unit for performing wireless communication with a communication terminal, and the first communication unit transmits information on an on/off state of the first load testing device to the communication terminal and receives a signal on a command for operating the first load testing device from the communication terminal.

The communication terminal according to the present invention is a communication terminal for performing wireless communication with a first load testing device including a first communication unit for performing wireless communication with the communication terminal, and receives information on an on/off state of the first load testing device from the first communication unit and transmits a signal related to an instruction to operate the first load testing device to the first communication unit.

According to the present invention, it is possible to provide a load system or the like that enables an operator located at a remote location to grasp the state of a load testing apparatus or to operate the load testing apparatus.

Drawings

Fig. 1 is a perspective view of the load testing apparatus according to the present embodiment before a protective cover or the like is attached.

Fig. 2 is a schematic diagram showing the structure of the load test apparatus.

Fig. 3 is a perspective view of the operation portion.

Fig. 4 is a perspective view of the load testing apparatus before the first load testing protective cover and the like are attached.

Fig. 5 is a perspective view of the load testing apparatus after the first load testing protective cover and the like are attached.

Fig. 6 is a perspective view of the load testing apparatus mounted on the server rack.

Fig. 7 is a perspective view of the load testing apparatus before the second load testing protective cover and the like are attached.

Fig. 8 is a perspective view of the load testing apparatus after the second load testing protective cover and the like are attached.

Fig. 9 is a perspective view of the load testing apparatus after the second load testing protective cover and the like are attached, and caster wheels are attached instead of the handles of fig. 8.

Fig. 10 is a schematic diagram showing the structure of the load system.

Fig. 11 is a diagram showing an example of an on-off state display pattern displayed on the display device of the communication terminal.

Fig. 12 is a diagram showing an example of a history display pattern displayed on the display device of the communication terminal.

Fig. 13 is a diagram showing an example of an on-off state display pattern in which a use mode switching button region is added.

Fig. 14 is a diagram showing an example of a warning display pattern displayed on the display device of the communication terminal.

Fig. 15 is a diagram showing an example of a communication resumption display pattern displayed on the display device of the communication terminal.

Fig. 16 is a flowchart showing an example of a procedure of the gradual disconnection control based on the communication disconnection.

Detailed Description

The present embodiment will be described below with reference to the drawings. The dry load test apparatus 1 of the present embodiment includes a housing 10, a resistance unit 20, a cooling unit 30, a connection switching unit 40, and an installation member 50 (fig. 1 to 9).

For explanation of the directions, a direction in which the resistors Re of the resistance section 20 extend is an x direction, a direction perpendicular to the x direction and in which the resistance section 20 and the cooling section 30 are arranged is a y direction, and a direction perpendicular to the x direction and the y direction is a z direction.

In the first embodiment (the first load test as the load test for the air-conditioning apparatus for cooling the computer server, refer to fig. 1 to 6), the x direction and the y direction are horizontal directions, and the z direction is a vertical direction.

In the second embodiment (second load test as a load test of a generator or a battery, refer to fig. 1 to 3, and 7 to 9), the x direction and the z direction are horizontal directions, and the y direction is a vertical direction.

The outer shape of the housing 10 is formed in a rectangular parallelepiped shape in which one of yz planes perpendicular to the x direction is a first side surface 10a, the other is a second side surface 10b, in which one of xy planes perpendicular to the z direction is an upper surface 10c, the other is a lower surface 10d, in which one of xz planes perpendicular to the y direction is a front surface 10e, the other is a rear surface 10f, a first region 11 is on the side close to the front surface 10e, and a second region 12 is on the side close to the rear surface 10 f.

In the first embodiment, the lower surface 10d is a bottom surface, and in the second embodiment, the front surface 10e is a bottom surface.

The case 10 accommodates the cooling portion 30 in the first region 11 and the resistance portion 20 in the second region 12.

On the first side surface 10a, the second side surface 10b in the first region 11 of the housing 10, there are provided a first terminal connection portion 41, a second terminal connection portion 42, and a relay portion 45.

In particular, the first terminal connecting portion 41 and the second terminal connecting portion 42 are disposed on the front surface 10e side than the mounting position of the housing mounting bracket 51 described later.

The operation unit 47 is detachably attached to the front surface 10e of the housing 10 or the upper surface 10c of the first region 11 of the housing 10.

The first side surface 10a, the second side surface 10b, the upper surface 10c, and the lower surface 10d in the second region 12 of the case 10 are provided with a resistor Re constituting the resistance portion 20, a cable or a shorting bar connected to a terminal of the resistor Re, and a cover 13 (a first side surface cover 13a, a second side surface cover 13b, an upper surface cover 13c, a lower surface cover 13d) protecting a holding plate 21 holding the resistor Re.

The cover 13 is made of a conductive material such as iron or aluminum.

Further, at least the front surface 10e, the rear surface 10f, and the upper surface 10c and the lower surface 10d of the first region 11 are opened, so that the cold air from the cooling portion 30 reaches the resistance portion 20, and then is exhausted from the rear surface 10 f.

In order to efficiently perform the air suction, it is preferable that the first side surface 10a and the second side surface 10b have opening regions other than the region where the first terminal connecting portion 41 and the like are mounted.

In the case of the first load test, the cooling fan of cooling unit 30 is mainly used to draw air in the area where operation unit 47 is not mounted, out of the openings of upper surface 10c, lower surface 10d, and front surface 10e of first area 11, and the cooling fan of cooling unit 30 is mainly used to discharge air in the area where operation unit 47 is not mounted, out of the openings of rear surface 10 f.

In the second load test, the cooling fan of cooling unit 30 is mainly used to draw air in, and the cooling fan of cooling unit 30 is mainly used to discharge air, using the openings of top surface 10c and bottom surface 10d of first region 11, and the openings of front surface 10e, where operation unit 47 is not mounted.

On the first side surface 10a and the second side surface 10b in the first region 11 of the casing 10, a rack mount bracket 51 is mounted, and the load testing apparatus 1 is mounted to the server rack 90 via this rack mount bracket 51.

The server rack 90 is generally used to hold computer servers, and holds the load testing apparatus 1 in place of the computer servers during the first load test.

Since the load test apparatus 1 is mounted on the server rack 90, the width of the casing 10 (the distance between the first side surface 10a and the second side surface 10b) is shorter than the width of the server rack 90.

In particular, when the server rack 90 is a 19-inch rack, the width of the casing 10 and the like are set so that the width between the rack-mounting brackets 51 mounted on the first side surface 10a of the casing 10 and the rack-mounting brackets 51 mounted on the second side surface 10b of the casing 10 (the distance between the holes mounted on the server rack 90) is 19 inches (about 480 mm).

The resistor section 20 is used for performing a load test (a first load test and a second load test), and is configured by arranging a plurality of resistor rows in the y direction, and the resistor rows are configured by arranging a plurality of rod-like resistors Re parallel to the x direction at predetermined intervals in the z direction.

In the first load test (first embodiment) for cooling the air-conditioning equipment of the computer server, the first terminal connection portion 41 is connected to the same commercial power supply as the power supply to the computer server, and the resistor Re receives the power supply from the commercial power supply.

In the second load test (second embodiment) of the generator or the battery, the first terminal connection portion 41 is connected to a test object power source (generator or battery), and the resistor Re receives power supply from the test object power source.

In the present embodiment, the resistor array in which 4 resistors Re are arranged in the z direction is arranged in 6 stages in the y direction. However, the number of resistors Re arranged in each resistor row and the number of stages in which the resistor rows are stacked are not limited thereto.

Among the resistors Re constituting the resistor section 20, a plurality of resistors Re adjacent to each other are connected in series or in parallel to form one resistor group, and a load test is performed while changing the number of resistor groups to which a voltage is applied from a commercial power supply (first embodiment) or a test object power supply (second embodiment).

The resistor unit 20 includes first to eighth resistor groups G1 to G8. However, the number of resistor groups G is not limited to the above structure.

The terminal of the resistor Re is connected to the terminal of the other resistor Re through a shorting bar or connected to the first terminal connection part 41 or the relay part 45 via a cable.

However, the shorting bar and the cable are omitted except for the cable connecting the first terminal connecting portion 41 and the commercial power supply in fig. 6, the cable connecting the second terminal connecting portion 42 and the commercial power supply, the cable connecting the first terminal connecting portion 41 and the test object power supply in fig. 8, and the cable connecting the second terminal connecting portion 42 and the commercial power supply.

The portion of the resistor Re that is not electrically connected to the terminal is held by the wall formed by the holding plate 21.

It is preferable that a portion of the resistor Re (a terminal of the resistor Re) protruding and exposed from the wall formed by the holding plate 21 is covered with a cover (not shown) formed of an insulating member such as rubber.

In order to efficiently perform cooling by the cooling portion 30, the resistors Re of the resistor row adjacent in the y direction are arranged at intermediate positions between the resistors Re constituting the resistor row and the resistors Re adjacent to the resistors Re in the z direction, in such a manner that the resistors Re of each resistor row are arranged.

The cooling part 30 has a cooling fan that cools the resistor Re of the resistance part 20 using air taken in from the outside.

The cooling fan is driven by a commercial power supply (power supply for driving the load test apparatus) (see fig. 2).

The cooling fan is preferably detachably attached to the first region 11 of the housing 10 using screws or the like.

In this case, the cooling fan and the operation unit 47 of the cooling unit 30 can be carried separately from the case 10 of the load testing apparatus 1 and the like, and the cooling unit 30 and the operation unit 47 can be attached to the case 10 and the like at the site where the load test is performed.

In particular, in a state where the operation portion 47 is detached from the housing 10 (in a state where at least the operation portion 47 is detached from the upper surface 10c and the lower surface 10d of the housing 10), the cooling fan of the cooling portion 30 is easily attached and detached.

The load test apparatus 1 can perform a load test in a state where the cooling unit 30 and the resistance unit 20 are arranged in the horizontal direction (first embodiment), and can also perform a load test in a state where the cooling unit 30 and the resistance unit 20 are arranged in the vertical direction (second embodiment).

The cooling wind fed from cooling unit 30 to resistance unit 20 is exhausted from rear surface 10f of case 10.

The connection switching unit 40 includes a first terminal connection portion 41, a second terminal connection portion 42, a relay portion 45, and an operation portion 47 (see fig. 2 to 4 and 7).

The first terminal connection unit 41 is a terminal for cable connection to a test object power source (second embodiment) such as a commercial power source (first embodiment) or a generator, and the commercial power source (first embodiment) or the test object power source (second embodiment) can be connected to the resistor groups (first to eighth resistor groups G1 to G8) constituting the resistor unit 20 via the first terminal connection unit 41.

The cable connection between the first terminal connecting portion 41 and the commercial power supply (first embodiment) or the test object power supply (second embodiment) is performed between the region in the opening of the first side surface 10a where the rack mount bracket 51 is mounted and the front surface 10e (see fig. 6).

Preferably, a Circuit Breaker such as VCB (Vacuum Circuit Breaker) is provided between the first terminal connection portion 41 and the relay portion 45 or at the first terminal connection portion 41.

The second terminal connection portion 42 is a terminal for cable connection to the commercial power supply, and the commercial power supply can be connected to the cooling fan of the cooling portion 30, the relay of the relay portion 45, and the operation portion 47 via the second terminal connection portion 42.

However, in the second load test, the second terminal connection portion 42 may be connected to the test subject power supply as well, and the cooling fan of the cooling unit 30, the relay of the relay unit 45, and the operation unit 47 may be driven using the electric power supplied from the test subject power supply.

The cable connection between the second terminal connecting portion 42 and the commercial power source is performed between the region in the opening of the first side surface 10a where the rack mount bracket 51 is mounted and the front surface 10e (refer to fig. 6).

Preferably, a Circuit Breaker such as mccbv (Molded Case Circuit Breaker) is provided between the second terminal connection portion 42 and the relay portion 45 or at the second terminal connection portion 42.

The relay unit 45 includes: a relay (cooling fan relay RC) that performs on-off control of power supply to cooling unit 30 in accordance with operation of the switch of operation unit 47, and relays (first relay R1 to eighth relay R8) that perform on-off control of power supply to each of the resistor groups (first resistor group G1 to eighth resistor group G8) constituting resistance unit 20.

The relays (cooling fan relay RC, first relay R1 to eighth relay R8) constituting relay unit 45 are driven by a commercial power supply (power supply for driving a load test apparatus) (see fig. 2 and 3).

The operation unit 47 includes a power switch 47a, a cooling fan switch 47b, a resistance switching switch 47c, and a display unit 47d (see fig. 3).

The power switch 47a is a slide-type (or toggle-type, push-button-type) operation switch for selecting on/off of the load testing apparatus 1.

When the power switch 47a is turned on, the breaker of the first terminal connecting portion 41 or a relay (not shown) is turned on, and a current from the commercial power supply (first embodiment) or the test object power supply (second embodiment) connected to the load test apparatus 1 flows into the first relay R1 to the eighth relay R8 of the relay portion 45 via the first terminal connecting portion 41.

When the power switch 47a is turned on, the circuit breaker of the second terminal connection portion 42 or a relay not shown is turned on, and a current from the commercial power supply connected to the load test apparatus 1 flows into the cooling fan relay RC of the relay portion 45 and the operation portion 47 via the second terminal connection portion 42.

Cooling fan switch 47b is a slide-type (or toggle-type, push-button-type) operation switch for selecting on/off (mode switching) of the cooling fan of cooling unit 30.

When cooling fan switch 47b is turned on, cooling fan relay RC is turned on, and a current from the commercial power supply connected to load test apparatus 1 flows into the cooling fan of cooling unit 30 via second terminal connection portion 42.

The resistance change-over switches 47c (the first resistance change-over switch 47c1 to the eighth resistance change-over switch 47c8) are slide-type (or toggle-type, push-button-type) operation switches for on/off control of the relays (the first relay R1 to the eighth relay R8) of each of the first resistor group G1 to the eighth resistor group G8.

When the first resistance switching switch 47c1 is turned on, the relay (the first relay R1) of the first resistor group G1 is turned on, and a current from the commercial power supply (the first embodiment) or the test object power supply (the second embodiment) connected to the load test apparatus 1 flows into the first resistor group G1 via the first terminal connection portion 41.

Similarly, when the second to eighth resistance switching switches 47c2 to 47c8 are turned on, the relays of the corresponding resistor groups are in an on state, and the current from the commercial power supply (first embodiment) or the test object power supply (second embodiment) to which the load test apparatus 1 is connected flows into the resistor groups via the first terminal connecting portions 41.

The display unit 47d is a display device that indicates the operation state of the load testing apparatus 1, and includes: a first lighting portion 47d1 that lights up in normal operation; a second lighting portion 47d2 that lights up at the time of warning; and a third lighting portion 47d3 that lights when the operation is stopped due to an abnormality.

The display 47d may also display the values of the current flowing through the first through eighth resistor groups G1-G8, the voltage applied to the first through eighth resistor groups G1-G8, the power value, the load amount, the test time, etc., and the operation state such as whether it is operating normally, etc.

The operation unit 47 is detachably attached to the front surface 10e of the housing 10 (the first embodiment) or the upper surface 10c (the lower surface 10d in the second embodiment) of the first region 11 of the housing 10.

The operating portion 47 is mounted to the housing 10 by passing screws or the like through first mounting holes 49a provided in the housing 471.

The operation portion 47 is mounted on a front surface 10e (first embodiment) parallel to the rear surface 10f as the first region 11 of the casing 10, or any one of an upper surface 10c, a lower surface 10d, and side surfaces (first side surface 10a, second side surface 10b) perpendicular to the front surface 10e as the first region 11 of the casing 10.

When the operation portion 47 is attached to any one of the opening of the upper surface 10c, the lower surface 10d, and the side surfaces (the first side surface 10a, the second side surface 10b), the cooling air is sucked using at least the opening of the front surface 10e (the first embodiment).

When the operation portion 47 is attached to the front surface 10e, cooling air is sucked using at least one of the opening of the upper surface 10c, the lower surface 10d, and the openings of the side surfaces (the first side surface 10a and the second side surface 10b) of the first region 11 (second embodiment).

In the present embodiment, the operation portion 47 may be detachably attached at more than one position, but at least two positions (the front surface 10e, the upper surface 10c (or the lower surface 10d, the first side surface 10a, the second side surface 10 b)).

Therefore, the load test apparatus 1 can be easily handled regardless of whether it is provided with the resistance portion 20 and the cooling portion 30 arranged in the horizontal direction or arranged in the vertical direction.

The operation portion 47 has a recessed portion 473 recessed from the case 471 such that the power switch 47a and the like do not protrude from the front surface 10e or the upper surface 10c when the operation portion 47 is mounted on the case 10. In the recess 473, a power switch 47a, a cooling fan switch 47b, a resistance switching switch 47c, and a display portion 47d are provided.

A contact 48 is provided on the rear surface side of the recess 473 (on the side opposite to the outside on which the power switch 47a and the like are provided), and the power switch 47a, the first terminal connecting portion 41, the second terminal connecting portion 42, the cooling fan switch 47b, the cooling fan relay RC, the first resistance switching switch 47c1, the first relay R1, and the like are electrically connected through this contact 48.

By mounting and dismounting via the contact 48, the operation portion 47 can be easily wired electrically.

The case 471 is provided with a second mounting hole 49b in addition to the first mounting hole 49 a.

The setting member 50 has a rack mount bracket 51 and a handle 53.

The rack mount bracket 51 has an L shape, and one surface constituting the L shape is mounted to the first side surface 10a and the second side surface 10b of the casing 10 using screws or the like, and the other surface constituting the L shape is mounted to the server rack 90 using screws or the like (first embodiment).

The load testing apparatus 1 is mounted to the server rack 90 such that a part (the front surface 10e, etc.) of the first region 11 protrudes from the server rack 90. The first terminal connection portion 41 and the second terminal connection portion 42 are arranged on the front surface 10e side in the first region 11 than the position (the mounting position of the rack mounting bracket 51) on the server rack 90 in the side surface (the first side surface 10a or the second side surface 10b) of the casing 10.

In the second embodiment, the rack mount bracket 51 is not used.

The handle 53 has an コ shape, and two or more handles are provided.

In the first embodiment in which the operation portion 47 is attached to the front surface 10e of the casing 10, the handle 53 is attached to the front surface 10e via the second attachment hole 49b for attaching and detaching the load testing device 1 to and from the server rack 90.

In the second embodiment in which the operation portion 47 is mounted on the upper surface 10c in the first region 11 of the housing 10, the handle 53 is mounted on the front surface 10e without passing through the second mounting hole 49b for providing a certain interval between the front surface 10e as the bottom surface of the housing 10 and the placement surface on which the load test apparatus 1 is placed, thereby being used for air suction.

However, in the second embodiment, instead of two or more コ -shaped handles 53, four or more casters 54 may be attached to the front surface 10e (see fig. 9). In this case, the caster 54 provides a certain interval between the front surface 10e of the housing 10 as the bottom surface and the placing surface on which the load test apparatus 1 is placed, thereby serving for air suction.

When performing a first load test, that is, a load test for cooling an air conditioner of a computer server, the load test apparatus 1 is configured such that the cooling unit 30 and the resistance unit 20 are arranged in a horizontal direction, power from a commercial power supply is supplied to the resistor groups (the first resistor group G1 to the eighth resistor group G8) via the first terminal connecting unit 41 and the relay unit 45 (the first relay R1 to the eighth relay R8), the side surfaces (the first side surface 10a and the second side surface 10b) of the casing 10 are attached to the server rack 90 holding the computer server, the operation unit 47 is attached to the front surface 10e of the casing 10, air is sucked using at least one of the opening of the front surface 10e, the opening of the upper surface 10c of the first region 11, and the opening of the lower surface 10d, and air is exhausted from the rear surface 10f of the casing 10 in the horizontal direction.

When performing a load test of a test object power source such as a generator or a battery, which is a second load test, the load test apparatus 1 is configured such that the cooling unit 30 is disposed above the lower resistor unit 20, the handle 53 (or the caster 54) is used to provide a predetermined distance between the front surface 10e and a mounting surface on which the load test apparatus 1 is mounted, power from the test object power source is supplied to the resistor groups (the first resistor group G1 to the eighth resistor group G8) via the first terminal connecting unit 41 and the relay unit 45 (the first relay R1 to the eighth relay R8), the operation unit 47 is attached to the upper surface 10c or the lower surface 10d of the housing 10, air is sucked using at least one of the opening of the front surface 10e, the opening of the upper surface 10c of the first region 11, and the opening of the lower surface 10d, and air is exhausted in an upward direction from the rear surface 10 f.

In the first load test, the load test apparatus 1 is mounted on the server rack 90 in which the computer server is installed, and the resistance unit 20 of the load test apparatus 1 is supplied with electric power using the commercial power supply for driving the computer server, and the air conditioner of the room in which the computer server is installed is operated under a condition of the same amount of heat generation or the like as that in driving the computer server, to confirm whether the cooling capacity of the air conditioner is sufficient.

At this time, the load testing apparatus 1 is mounted on the server rack 90 in the same manner as the computer server.

Since the air blowing direction of the air conditioner is set in consideration of the position of the cooling target such as the computer server, the load test apparatus 1 generates heat at the same level as the amount of heat generated by the computer server at the position where the computer server is installed, and thus the load test (first load test) of the air conditioner can be performed in an environment state close to the actual operation of the computer server.

The first terminal connecting portion 41 and the second terminal connecting portion 42 that make cable connection with the commercial power supply are disposed on the front surface 10e of the first side surface 10a at a position closer to the mounting rack mounting bracket 51 and protrude from the server rack 90, and therefore, even after the load test apparatus 1 is mounted on the server rack 90, the cable connection can be easily made.

Further, the operation portion 47 may be attached not only to the front surface 10e but also to another surface (here, the upper surface 10c), and may perform not only the load test by performing the exhaust in the horizontal direction as in the first embodiment but also the load test (second load test) by performing the exhaust in the upward direction as in the second embodiment.

At this time, by using the handle 53 or the caster 54, a gap for allowing cooling air to enter from between the front surface 10e constituting the bottom surface of the housing 10 and the mounting surface of the load testing apparatus 1 can be provided.

The operation of the operation unit 47 is performed by providing a communication unit 59 that performs bidirectional wireless communication with an external communication terminal 69 (for example, a mobile phone with predetermined software installed) in addition to a mode in which an operator directly operates a switch of the operation unit 47, and operating the operation unit 47 (a relay that is interlocked with an on/off operation of the operation unit 47) based on an instruction from the communication terminal 69 via the control unit 58 (see fig. 10 to 12).

In this case, the load testing apparatus 1 further includes a control unit 58 and a communication unit 59.

The control unit 58 such as a CPU controls the operation unit 47 and the communication unit 59.

The communication section 59 receives an instruction signal for operating the relay corresponding to the switch of the operation section 47 from the communication terminal 69, and transmits information on the state of the load test apparatus 1 (on-off state of the relay, etc.) to the communication terminal 69.

The wireless communication method used for communication between the communication unit 59 and the communication terminal 69 is, for example, ieee802.15.1(Bluetooth (registered trademark)), IEEE802.11 (wireless LAN), a mobile phone line, or the like.

Normally, only an operator near the operation unit 47 of the load testing apparatus 1 can grasp the state of the load testing apparatus 1 and operate the load testing apparatus 1, and an operator located at a remote position from the load testing apparatus 1 cannot grasp the state of the load testing apparatus 1 and cannot operate the operation unit 47 of the load testing apparatus 1, but by using the communication terminal 69 that can communicate with the load testing apparatus 1, an operator located at a remote position from the load testing apparatus 1 can grasp the state of the load testing apparatus 1 and can operate the operation unit 47 of the load testing apparatus 1 (a relay that is linked with the on/off operation of the operation unit 47).

Further, a load system including two or more load test apparatuses 1 and a communication terminal 69 may be configured so that the communication terminal 69 can wirelessly communicate with the two or more load test apparatuses 1.

The communication terminal 69 communicates with the plurality of load testing devices 1 and operates the operation unit 47 of the plurality of load testing devices 1, so that the states of the plurality of load testing devices 1 can be simultaneously displayed on a single communication terminal 69 and the plurality of load testing devices 1 can be operated by a single operator.

The present invention is particularly effective when a plurality of load test apparatuses 1 are provided to perform a load test (first load test) of an air conditioner.

Specifically, the communication terminal 69 has a display function and an operation function such as a touch switch, and includes a display device 77 for displaying an on-off state display pattern D1 and a history display pattern D2 during the above-described predetermined software startup.

The on/off state display pattern D1 indicates the state of the operation unit 47 in the load test apparatus 1, and includes: a power source state display region 77a indicating an on/off state of the breaker of the first terminal connecting portion 41 (an on/off state of the power source switch 47 a); a cooling state display area 77b indicating an on/off state of the cooling fan relay RC (an on/off state of the cooling fan switch 47 b); the first to eighth display regions 77c1 to 77c8 show on/off states of the first to eighth relays R1 to R8 (on/off states of the first to eighth resistance switching switches 47c1 to 47c8) corresponding to the first to eighth resistor groups G1 to G8; a load test state display region 77d indicating the state (current value, etc.) of the load test apparatus 1; a first switching button region 77e for switching to the display of the on-off state display pattern D1 corresponding to the other load test devices; and a second switch button region 77f for switching to the display of the history display pattern D2.

When the power source state display region 77a is operated, switching of the on-off state of the breaker or the like (power source switch 47a) of the first terminal connecting portion 41 of the corresponding load test apparatus 1 is performed.

When the cooling state display region 77b is operated, switching of the on-off state of the cooling fan relay RC (cooling fan switch 47b) of the corresponding load test apparatus 1 is performed.

When the first display region 77c1 is operated, switching of the on-off state of the first relay R1 (the first resistance switching switch 47c1) of the corresponding load test apparatus 1 is performed.

When the second to eighth display regions 77c2 to 77c8 are similarly operated, switching of the on-off states of the second to eighth relays R2 to R8 (the second to eighth resistance switching switches 47c2 to 47c8) of the respective load testing apparatuses is performed.

Fig. 11 shows an example of an on/off state display pattern D1 in which the power switch 47a, the cooling fan switch 47b, the first resistance switching switch 47c1, and the second resistance switching switch 47c2 are in an on state, and the third resistance switching switch 47c3 to the eighth resistance switching switch 47c8 are in an off state in the load testing apparatus 1 (the first load testing apparatus).

The load test state display region 77d is used to display the state of the load test performed by the corresponding load test apparatus 1 (the values of the current flowing through the first to eighth resistor groups G1 to G8, the voltage applied to the first to eighth resistor groups G1 to G8, the power value, the load amount, the test time, and the like, and the operation state such as whether or not to operate normally).

When the first switching button region 77e is operated, the display of the on-off state display pattern D1 of the other load test apparatus 1 which performs communication with the communication terminal 69 is switched.

When the second switching button region 77f is operated, the list display of the load test information of the load test apparatuses 1 communicating with the communication terminal 69 is switched (history display pattern D2).

The history display pattern D2 includes: an ongoing display area 77g indicating the state of the load test apparatus 1 in communication with the communication terminal 69; and a past display area 77h showing the contents of the past load tests (date and time of the load test, etc.) of the load testing device 1 which has communicated with the communication terminal 69.

Fig. 12 shows an example of the history display pattern D2, including: two in-progress display areas 77g (77g1, 77g2) showing the states of the load tests of the two load test apparatuses 1 (the first load test apparatus and the second load test apparatus) in communication with the communication terminal 69; and three past display areas 77h (77h1, 77h2, 77h3) showing the contents of past load tests of the three load test apparatuses 1 (the first load test apparatus, the second load test apparatus, and the third load test apparatus) which have communicated with the communication terminal 69.

Further, a use mode switching button region 77i (see fig. 13) for performing off control based on the communication state may be provided in the on-off state display pattern D1.

In a state of being in a mode of performing off control based on the communication state by using the mode switching button region 77i, when the communication state between the communication section 59 and the communication terminal 69 is cut off, the control section 58 turns off (at least one) of the relays R1 to R8 which is in an on state, thereby reducing the load.

For example, only the relay corresponding to the resistor group having a small resistance value among the resistor groups may be turned on, and the relays corresponding to the other resistor groups may be turned off.

In order to avoid a failure due to a sudden change in load, it is preferable that all relays in the on state are not turned off at the same time, but are turned off step by step, i.e., one by one at every first time t1 (e.g., t1 ═ 10 seconds).

Thus, electric power is supplied from the commercial power supply or the test object power supply via the first terminal connecting portion 41 only to the resistor group corresponding to the relay in the on state.

However, at least one of the relays corresponding to the resistor group is not turned off until the second time t2 (e.g., 5 minutes at t 2) elapses from the start of the control of reducing the load, but maintains the on state.

Further, the communication terminal 69 displays a warning display pattern D3 (see fig. 14).

The warning display pattern D3 outputs characters indicating "communication with the communication unit is interrupted" and "the load of the load testing apparatus is gradually reduced and the operation is stopped after the second time t2 has elapsed".

It may be in the form of outputting a sound indicating "communication with the communication section has been cut off" and "the load of the load testing apparatus is reduced stepwise, stopping the operation after the second time t2 has elapsed" by the communication terminal 69 instead of the warning display pattern D3 or in addition to the warning display pattern D3.

After the second time t2 has elapsed since the load was decreased, the controller 58 turns off the relays of the first to eighth relays R1 to R8 that are in the on state, and stops the supply of electric power to the resistor 20.

Thereafter, control unit 58 turns off cooling fan relay RC, and the load test ends.

After the communication between the communication unit 59 and the communication terminal 69 is cut off, if the communication is resumed before all the relays corresponding to the resistor group in the load testing apparatus 1 are turned off (before the second time t2 elapses), the control of gradually turning off the state is stopped, and the communication terminal 69 displays a communication resumption display pattern (see fig. 15) including information on the resumption of the communication.

The communication resumption display pattern D4 outputs characters indicating "communication with the communication unit is resumed", "the load test can be continued", "the on/off state of the switch is confirmed (the on/off state of the switch is changed by the step-by-step off control)".

The communication terminal 69 may output a sound indicating "communication with the communication unit is restored", "the load test can be continued", "the on/off state of the switch is confirmed (the on/off state of the switch is changed due to the step-by-step off control)" instead of the communication restoration display pattern D4 or in addition to the communication restoration display pattern D4.

The spot display of the warning display pattern D3 and the communication resumption display pattern D4 is ended after a predetermined operation (e.g., a touch of an area of the spot display warning display pattern D3, etc.) or after a third time t3 (e.g., t3 ═ 30 seconds) has elapsed after the start of the spot display.

Further, the communication terminal 69 receives information on the on/off state of each relay in the load testing apparatus 1, and updates the on/off state display pattern D1.

When the communication between the communication unit 59 and the communication terminal 69 is interrupted, the load state of the load testing apparatus 1 and the like cannot be controlled by the operation of the communication terminal 69, but the load can be reduced based on the interruption of the communication, and the safety of the load testing apparatus 1 can be ensured.

Further, the load test is continued at a low load from the time of the decrease in the load until the second time t2 elapses, and the operator operates the operation unit 47 or operates the communication terminal 69 after the communication state is restored to increase the load, thereby restarting the load test at a high load.

An example of the procedure of the gradual disconnection control based on the communication disconnection will be described with reference to the flowchart of fig. 16.

In step S11, the control unit 58 determines whether or not the communication state between the communication unit 59 and the communication terminal 69 has been interrupted for a fourth time t4 or longer (e.g., t4 is 10 seconds).

If it is, the flow proceeds to step S12. If not, the determination of step S11 is performed again after the fifth time t5 (e.g., t5 ═ 5 seconds).

The controller 58 performs the step-by-step off control at step S12.

Specifically, the control portion 58 turns off one of the relays in the on state among the relays corresponding to the resistor group.

However, when the number of relays in the on state among the relays corresponding to the resistor group is a predetermined number (e.g., one), the relays are not turned off, and the process proceeds to step S13.

Further, when the communication state between communication unit 59 and communication terminal 69 continues to be interrupted for a fourth time or longer, communication terminal 69 displays warning display pattern D3.

After the first time t1 has elapsed from step S12, the control unit 58 determines in step S13 whether or not the second time t2 has elapsed since the step-by-step off control of step S12 was first performed.

If the second time t2 has elapsed, the process advances to step S16; if not, the process advances to step S14.

In step S14, control unit 58 determines whether or not the communication state between communication unit 59 and communication terminal 69 has recovered, that is, whether or not communication between communication unit 59 and communication terminal 69 is possible.

If the communication state has been recovered, the process advances to step S15; if not, the process advances to step S12.

In step S15, the control section 58 releases the step-by-step disconnection control, and the communication terminal 69 displays the communication resumption display pattern D4.

In step S16, control unit 58 turns off a predetermined number of remaining relays in the on state, and ends the process.

When the communication state between the communication unit 59 and the communication terminal 69 is disconnected in a state where the mode switching button region 77i is in a mode in which disconnection control is not performed based on the communication state, the control unit 58 does not perform the above-described disconnection control (disconnection control in which the load is gradually reduced so as to finally stop the load testing apparatus 1), and the communication terminal 69 does not perform the alarm output but continues the load test.

Description of the reference numerals

1 load test device

10 casing

10a first side surface

10b second side surface

10c upper surface

10d lower surface

10e front surface

10f rear surface

11 first region

12 second region

13 cover

13a first side surface cover

13b second side surface cover

13c upper surface cover

13d lower surface cover

20 resistance part

30 cooling part

40 connection switching part

41 first terminal connection part

42 second terminal connection portion

45 relay unit

47 operating part

47a power switch

47b Cooling Fan switch

47c resistance change-over switch

47c1 ~ 47c8 first to eighth resistance change-over switches

47d display unit

471 casing

473 recess

48 contact

49a first mounting hole

49b second mounting hole

50 setting member

51 Rack mounting bracket

53 handle

54 castor

58 control part

59 communication unit

69 communication terminal

77a power state display area

77b cooling state display area

77c 1-77 c8 first to eighth display regions

77d load test state display area

77e first switching button area

77f second switch button area

77g in-progress display area

77h past display area

77i use mode switch button area

90 server rack

D1 ON-OFF status display pattern

D2 historical display pattern

D3 warning display pattern

D4 communication resume display pattern

G1-G8 first to eighth resistor groups

First to eighth relays R1-R8

RC cooling fan relay

Re resistor

t1 first time (time interval for gradual load reduction)

t2 second time (time until all relays corresponding to the resistor group are turned off)

t3 third time (time until the end of the spot display)

t4 fourth time (time when communication state is continuously cut off)

t5 fifth time (time interval for making the judgment at step S11)