阅读说明：本技术 一种网络供电检测装置 (Network power supply detection device ) 是由 王占奇 于 2019-04-10 设计创作，主要内容包括：本申请提供一种网络供电检测装置。该装置包括：电压输出电路、电压供电电路和供电检测控制模块；电压输出电路,连接于待供电对象的输出端,输出用于判断待供电对象是否支持网络供电的电压Vad1；电压供电电路,连接于待供电对象的输出端,用于为所述待供电对象供电；供电检测控制模块,与所述电压输出电路连接,用于检测所述电压Vad1,根据所述电压Vad1控制所述电压供电电路接通或断开。该方案提高了为待供电对象网络供电的安全性,满足了网络供电的要求。(The application provides a network power supply detection device. The device includes: the power supply device comprises a voltage output circuit, a voltage power supply circuit and a power supply detection control module; the voltage output circuit is connected to the output end of the object to be supplied with power and outputs voltage Vad1 for judging whether the object to be supplied with power supports network power supply; the voltage power supply circuit is connected to the output end of the object to be powered and used for supplying power to the object to be powered; and the power supply detection control module is connected with the voltage output circuit, is used for detecting the voltage Vad1, and controls the voltage power supply circuit to be switched on or switched off according to the voltage Vad 1. The scheme improves the safety of network power supply for the object to be powered and meets the requirement of network power supply.)

1. A network power supply detection device, comprising: the power supply device comprises a voltage output circuit, a voltage power supply circuit and a power supply detection control module;

the voltage output circuit (10) is connected to the output end of the object to be supplied with power (30) and outputs voltage Vad1 for judging whether the object to be supplied with power supports network power supply;

the voltage supply circuit (20) is connected to the output end of the object (30) to be supplied with power and is used for supplying power to the object (30) to be supplied with power;

and the power supply detection control module (40) is connected with the voltage output circuit (10) and is used for detecting the voltage Vad1 and controlling the voltage supply circuit (20) to be switched on or switched off according to the voltage Vad 1.

2. The network power supply detection device according to claim 1, wherein the voltage output circuit (10) comprises a first resistor (L1) and a second resistor (L2) connected in series to the output terminal of the object to be powered, the second resistor (L2) is connected to ground, and the voltage Vad1 is output from the input terminal of the second resistor (L2).

3. The network power supply detection device according to claim 1, further comprising a power supply module (50), wherein one end of the power supply module (50) is connected to the input end of the object to be powered (30), and the other end of the power supply module is connected to the voltage output circuit (10), so as to output a voltage V0 to the object to be powered (30).

4. The network power supply detection device according to claim 3, wherein the voltage V0 output by the power supply module (50) to the object (30) to be powered is a fixed voltage.

5. The network power supply detection device of claim 3, wherein the voltage Vad1 ═ V0 xR_L2/(R_X+R_L1+R_L2) The power supply detection control module (40) detects that the voltage Vad1 is Vst, the voltage supply circuit (20) is controlled to be switched on according to the voltage Vad1, the power supply detection control module (40) detects that the voltage Vad1 is Vst, and the voltage supply circuit (20) is controlled to be switched off according to the voltage Vad 1;

wherein: r_L1Is the resistance value of the first resistor (L1); r_L2Is the resistance value of the second resistor (L2); r_XFor a specific resistance value of the object to be supplied in the voltage output circuit (10), by configuring R_L1And R_L2Obtaining; vst is the reference voltage value.

6. The network power supply detection device according to claim 3, wherein the output voltage V0 of the power supply module (50) ranges from 46V to 57V.

7. The network power supply detection device according to claim 1, wherein the voltage supply circuit (20) is further configured to output a voltage Vad2 at an output terminal of the object to be powered (30),

the power supply detection control module (40) is further connected to the voltage supply circuit (20) for detecting the voltage Vad2, and controlling the voltage supply circuit (20) to be switched on or off according to the voltage Vad 2.

8. The network power supply detection device according to claim 7, characterized in that the voltage supply circuit (20) comprises at least a third resistor (L3), the object (30) to be powered is grounded via the third resistor (L3), and the voltage Vad2 is led out from the input terminal of the third resistor (L3).

9. The network power supply detection device of claim 1, further comprising: a switch module (QV 1);

one end of the switch module (QV1) is connected with the output end of the object to be powered (30), the other end of the switch module is connected with the I/O end of the power supply detection control module (40), when the I/O end controls the switch module (QV1) to be in an open state, the voltage supply circuit (20) forms a loop, and when the I/O end controls the switch module (QV1) to be in a closed state, the voltage supply circuit (20) is disconnected.

10. The network power supply detection device according to claim 1, wherein the power supply detection control module (40) is implemented by a single chip microcomputer.

Technical Field

The application relates to the technical field of network equipment power supply, in particular to a network power supply detection device.

Background

Currently, a dedicated integrated circuit can be used for supplying power to a network device (such as a camera), but the dedicated integrated circuit is high in cost and low in economical efficiency. And some schemes for directly powering on the network camera through a spare wire or a signal wire of the network port exist, the power supply scheme cannot protect network equipment, the safety is poor, and the power supply requirement cannot be met.

Disclosure of Invention

In view of this, the present application provides a network power supply detection apparatus, which can effectively protect network devices, improve the security during network power supply, and meet the network power supply requirement.

Specifically, the method is realized through the following technical scheme:

a network power supply detection device comprising: the power supply device comprises a voltage output circuit, a voltage power supply circuit and a power supply detection control module;

the voltage output circuit is connected to the output end of the object to be supplied with power and outputs voltage Vad1 for judging whether the object to be supplied with power supports network power supply;

the voltage power supply circuit is connected to the output end of the object to be powered and used for supplying power to the object to be powered;

and the power supply detection control module is connected with the voltage output circuit, is used for detecting the voltage Vad1, and controls the voltage power supply circuit to be switched on or switched off according to the voltage Vad 1.

Optionally, the voltage output circuit includes a first resistor and a second resistor connected in series to the output end of the object to be supplied with power in sequence, the second resistor is grounded, and the voltage Vad1 is output from the input end of the second resistor.

Optionally, the network power supply detection device further includes a power supply module, where one end of the power supply module is connected to the input end of the object to be powered, and the other end of the power supply module is connected to the voltage output circuit, and is configured to output a voltage V0 to the object to be powered.

Optionally, the voltage V0 output by the power supply module to the object to be powered is a fixed voltage.

Optionally, the voltage Vad1 ═ V0 × R_L2/(R_X+R_L1+R_L2) The power supply detection control module detects a voltage Vad1 ≠ Vst, controls the voltage power supply circuit to be switched on according to a voltage Vad1, detects a voltage Vad1 ≠ Vst, and controls the voltage power supply circuit to be switched off according to a voltage Vad 1;

wherein: r_L1Is the resistance of the first resistor L1; r_L2Is the resistance of the second resistor L2; r_XThe specific resistance value of the object to be powered in the voltage output circuit is represented by configuring R_L1And R_L2Obtaining; vst is the reference voltage value.

Optionally, the output voltage V0 of the power supply module ranges from 46V to 57V.

Optionally, the voltage supply circuit is further configured to output a voltage Vad2 at an output terminal of the object to be powered,

the power supply detection control module is also connected with the voltage supply circuit, and is used for detecting the voltage Vad2 and controlling the voltage supply circuit to be switched on or switched off according to the voltage Vad 2.

Optionally, the voltage supply circuit at least includes a third resistor, the object to be supplied is grounded via the third resistor, and the voltage Vad2 is led out from an input end of the third resistor.

Optionally, the apparatus further comprises: a switch module;

one end of the switch module is connected with the output end of the object to be powered, the other end of the switch module is connected with the I/O end of the power supply detection control module, when the I/O end controls the switch module to be in an open state, the voltage power supply circuit forms a loop, and when the I/O end controls the switch module to be in a closed state, the voltage power supply circuit is disconnected.

Optionally, the power supply detection control module is implemented by a single chip microcomputer.

The technical scheme provided by the application can achieve the following beneficial effects:

the application provides a network power supply detection device, which comprises a voltage output circuit, a voltage power supply circuit and a power supply detection control module, wherein the voltage output circuit outputs a voltage Vad1 for judging whether an object to be powered supports network power supply, the power supply detection control module detects the voltage Vad1 and determines whether the object to be powered supports network power supply according to the voltage Vad1, and if the detection result indicates that the object to be powered supports network power supply, the power supply detection control module controls the voltage power supply circuit to be switched on to supply power to the object to be powered; if the detection result indicates that the object to be powered does not support network power supply, the power supply detection control module controls the voltage power supply circuit to be disconnected, so that the network power supply safety of the object to be powered is improved, and the network power supply requirement is met.

Drawings

FIG. 1 is a circuit diagram of a network power supply detection device shown in an exemplary embodiment of the present application;

fig. 2 is a schematic diagram of a power supply detection control module in a network power supply detection device according to an exemplary embodiment of the present application.

Detailed Description

Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, like numbers in different drawings represent the same or similar elements unless otherwise indicated. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present application. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the present application, as detailed in the appended claims.

The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. Unless defined otherwise, technical or scientific terms used herein shall have the ordinary meaning as understood by one of ordinary skill in the art to which this invention belongs. The use of "first," "second," and similar terms in the description and claims of this application do not denote any order, quantity, or importance, but rather the terms are used to distinguish one element from another. Also, the use of the terms "a" or "an" and the like do not denote a limitation of quantity, but rather denote the presence of at least one. "plurality" or "a number" means two or more. Unless otherwise specified, "front", "back", "lower" and/or "upper", "top", "bottom", and the like are for ease of description only and are not limited to one position or one spatial orientation. The word "comprising" or "comprises", and the like, means that the element or item listed as preceding "comprising" or "includes" covers the element or item listed as following "comprising" or "includes" and its equivalents, and does not exclude other elements or items. The terms "connected" or "coupled" and the like are not restricted to physical or mechanical connections, but may include electrical connections, whether direct or indirect.

Referring to fig. 1 and fig. 2, fig. 1 shows a circuit diagram of a network power supply detection device according to an exemplary embodiment of the present application, and fig. 2 shows a schematic diagram of a power supply detection control module according to an exemplary embodiment of the present application.

The application provides a network power supply detection device (hereinafter referred to as a device for short), which can detect whether an object 30 to be powered supports network power supply, and can switch on or off a circuit for supplying power to the object 30 to be powered according to a detection result, so that the safety of network power supply is ensured. The object to be powered 30 may be a network camera, or the like, but is not limited thereto.

Specifically, the apparatus includes a voltage output circuit 10, a voltage supply circuit 20, and a supply detection control module 40. The voltage output circuit 10 is connected to an output end of the object 30 to be powered, and outputs a voltage Vad1 for determining whether the object 30 to be powered supports network power supply; the voltage supply circuit 20 is connected to the output end of the object 30 to be supplied with power, is connected in parallel with the voltage output circuit 10, and is used for supplying power to the object 30 to be supplied with power; the power supply detection control module 40 is connected to the voltage output circuit 10, detects the voltage Vad1, determines whether the object 30 to be powered supports network power supply according to the voltage Vad1, and controls the voltage power supply circuit 20 to be switched on or off according to the determination result.

As can be seen from the above description, the apparatus first detects whether the object 30 to be powered supports network power supply before supplying power to the object, and if the detection result indicates that the object 30 to be powered supports network power supply, the power supply detection control module 40 controls the voltage supply circuit 20 to be turned on, and at this time, the object 30 to be powered can be powered; if the detection result is that the object 30 to be powered does not support network power supply, the power supply detection control module 40 controls the voltage power supply circuit 20 to be disconnected, and at this time, the object 30 to be powered cannot be powered, so that the network power supply safety of the object 30 to be powered is improved, and the network power supply requirement is met.

In the embodiment shown in fig. 1, the voltage output circuit 10 includes a first resistor L1 and a second resistor L2 connected in series to the output terminal of the object 30 to be powered, wherein the second resistor L2 is grounded, and the voltage Vad1 is output from the input terminal of the second resistor L2. After the arrangement, since the second resistor L2 is grounded, the voltage Vad1 can be directly output from the input terminal of the second resistor L2, which simplifies the output mode of the voltage Vad1, and at this time, the voltage Vad1 can be regarded as the voltage of the second resistor L2.

Certainly, in some other embodiments, the voltage Vad1 may also be the voltage of the first resistor L1, and in this scheme, two wires need to be led out from two ends of the first resistor L1, respectively, compared with this embodiment, the output mode of the voltage Vad1 in this embodiment is simpler.

In addition, it should be noted that the voltage output circuit 10 is not limited to include only the first resistor L1 and the second resistor L2, but may include a larger number of resistors, which is not limited in this application.

With continued reference to fig. 1, the apparatus further includes a power supply module 50, one end of the power supply module 50 is connected to the input end of the object to be powered 30, and the other end is connected to the voltage output circuit 10, and the power supply module 50 is configured to output a voltage V0 to the object to be powered 30.

In an alternative embodiment, the voltage V0 output by the power supply module 50 to the object 30 to be powered may be a fixed voltage V0, wherein the fixed voltage V0 may be provided by a dc power supply. It is thus understood that the fixed voltage V0 does not change during the power supply detection process, and therefore the configuration of the power supply detection control device can be simplified.

Further, in order to realize the remote network power supply, the output voltage V0 of the power supply module 50 ranges from 46V to 57V, but is not limited thereto. The output voltage V0 of the power supply module 50 may be different depending on the condition of the object 30 to be powered.

By providing the power supply module 50, the object 30 to be powered, the first resistor L1, and the second resistor L2 are connected to form a loop, so that the voltage output circuit 10 is always in an on state. In this state, Vad1 ═ V0 XR_L2/(R_X+R_L1+R_L2) The power supply detection control module 40 detects the voltage Vad1, compares the voltage Vad1 with the voltage Vst, and if the comparison result shows that Vad1 is equal to Vst, the power supply detection control module 40 controls the voltage power supply circuit 20 to be turned on, so that power can be supplied to the object 30 to be powered, and if the comparison result shows that Vad1 is equal to Vst, the power supply detection control module controls the voltage power supply circuit 20 to be turned on, so that power can be supplied to the object 30 to be poweredThe electricity detection control module 40 controls the voltage supply circuit 20 to be disconnected, and cannot supply electricity to the object 30 to be powered. Wherein: r_L1Is the resistance of the first resistor L1; r_L2Is the resistance of the second resistor L2; r_XFor the object 30 to be supplied with power, like a specific resistance value which is present in the voltage output circuit 10, by means of the arrangement R_L1And R_L2Obtained, in this example, R_L1And R_L2Resistance values of the order of K Ω; vst is a reference voltage value for determining whether or not the object to be supplied 30 supports network supply.

According to different specification parameters of the object 30 to be powered, the specific resistance value R of the object 30 to be powered in the detection mode_XMay not be equal, an embodiment, a specific resistance value R of the object 30 to be powered_XIs in the range of 19 to 26.5 K.OMEGA.but is not limited thereto.

Referring to fig. 1 again, the voltage supply circuit 20 is further configured to output a voltage Vad2 at an output end of the object 30 to be powered, and correspondingly, the power supply detection control module 40 may be further connected to the voltage supply circuit 20, and configured to detect the voltage Vad2 and control the voltage supply circuit 20 to be turned on or off according to the voltage Vad 2. After the arrangement, in the process of supplying power to the object 30 to be powered, the power of the object 30 to be powered can be detected in real time, so that overcurrent is avoided, and the safety in the power supply process is further improved.

Specifically, the voltage supply circuit 20 at least includes a third resistor L3, the object 30 to be supplied is grounded via the third resistor L3, and the voltage Vad2 is led out from the input end of the third resistor L3. In this case, the third resistor L3 is used as a sampling resistor for power detection, and at this time, the power P of the third resistor L3 is V0 × Vad2/RL 3. Wherein: r_L3Is the resistance of the third resistor L3.

The power supply detection control module 40 calculates the power P of the third resistor L3 according to the voltage Vad2, if P is less than or equal to P₀The power supply detection control module 40 controls the voltage supply circuit 20 to be switched on if P > P₀The power supply detection control module 40 controls the voltage supply circuit 20 to be disconnected.

Further, the power supply detection control module 40 may also upload the real-time power value of the third resistor L3 to the host for real-time power detection.

It should be noted that the voltage supply circuit 20 is not limited to the scheme shown in fig. 1, for example, in some other embodiments, the voltage supply circuit 20 may further include a larger number of resistors.

In the embodiment shown in fig. 1, the apparatus further comprises a switch module QV 1; one end of the switch module QV1 is connected to the output end of the object 30 to be powered, and the other end is connected to the I/O end of the power supply detection control module 40, when the I/O end control switch module QV1 is in an open state, the voltage supply circuit 20 forms a loop, at this time, the voltage supply circuit 20 supplies power to the object 30 to be powered, and when the I/O end control switch module QV1 is in a closed state, the voltage supply circuit 20 is disconnected.

In one embodiment, the switching module QV1 may be a Metal Oxide Semiconductor (MOS) transistor. The GATE of the MOS transistor is electrically connected to the I/O terminal of the power supply detection control module 40, and the GATE is turned off or turned on according to a control signal of the I/O terminal to control the source and the drain of the MOS transistor to be turned off or turned on.

It should be noted that, during the process of supplying power to the object 30 to be powered, the voltage output circuit 10 is always in the on state, but since the resistances of the first resistor L1 and the second resistor L2 in the voltage output circuit 10 are large and both are in the K Ω level, and the resistance of the switch module QV1 is small, which is equivalent to the first resistor L1 and the second resistor L2 being short-circuited by the switch module QV1, the current flowing through the first resistor L1 and the second resistor L2 is negligible.

Referring to fig. 2, the power supply detection control module 40 may be implemented by a single chip, and the single chip may be powered by a 3.3V dc power supply. The power supply detection control module comprises an I/O end, a first detection end AD _1 and a second detection end AD _ 2.

The first detecting terminal AD _1 is electrically connected to the voltage output circuit 10, and is used for detecting the voltage Vad1, and determining whether the object 30 to be powered supports network power supply according to the voltage Vad 1. The second detecting terminal AD _2 is electrically connected to the voltage supply circuit 20, and is used for detecting the voltage Vad2 and determining whether the object 30 to be supplied is over-current according to the voltage Vad 2.

The I/O terminal outputs a control signal according to the voltage Vad1 and the voltage Vad2 detected by the first detection terminal AD _1 and the second detection terminal AD _2, respectively, to control the voltage supply circuit 20 to be turned on or off.

For an object 30 to be powered, the single chip only occupies two digital-to-analog conversion pins and one control pin.

In addition, the network power supply detection device provided by the application can supply power through a network port idle line and a signal line, firstly detects whether the object 30 to be supplied with power supports network power supply before power supply, and can supply power remotely through the power supply module 50 of 46V-57V, and meanwhile, the device can also detect whether the object 30 to be supplied with power has an overcurrent phenomenon after power supply, so that the safety of network power supply is provided, and the cost is lower than that of an integrated circuit.

The above description is only exemplary of the present application and should not be taken as limiting the present application, as any modification, equivalent replacement, or improvement made within the spirit and principle of the present application should be included in the protection scope of the present application.