阅读说明：本技术 一种用电安全监控系统及其建筑物 (Power utilization safety monitoring system and building thereof ) 是由 郑大力 杨直文 刘亮 黄政 于 2021-09-13 设计创作，主要内容包括：本发明公开了一种用电安全监控系统,包括,接地网,接地电阻检测装置,接地状态监测装置,集中采集部件和状态监控终端,所述接地电阻检测装置和接地状态监测装置与所述接地网串联连接,所述接地电阻检测装置与接地状态监测装置并联连接,所述接地电阻检测装置、接地状态监测装置和接地网形成电路回路,所述接地电阻检测装置检测到的接地电阻数值大于预设电阻阈值,所述接地电阻检测装置切断所述电路回路的电连接。本发明可以根据客户实际需求灵活设置预设电阻阈值,有效减少误报、漏报的情况,降低了维护成本,提升客户体验,且能有效避免触电事故和电气火灾的发生,提升了供电系统的可靠性和安全性。(The invention discloses an electricity safety monitoring system, which comprises a grounding network, a grounding resistance detection device, a grounding state monitoring device, a centralized acquisition component and a state monitoring terminal, wherein the grounding resistance detection device and the grounding state monitoring device are connected with the grounding network in series, the grounding resistance detection device and the grounding state monitoring device are connected in parallel, the grounding resistance detection device, the grounding state monitoring device and the grounding network form a circuit loop, the value of the grounding resistance detected by the grounding resistance detection device is larger than a preset resistance threshold value, and the grounding resistance detection device cuts off the electric connection of the circuit loop. The invention can flexibly set the preset resistance threshold value according to the actual requirements of customers, effectively reduces the situations of false alarm and missed alarm, reduces the maintenance cost, improves the customer experience, can effectively avoid electric shock accidents and electric fires, and improves the reliability and the safety of a power supply system.)

1. The utility model provides an electricity consumption safety monitoring system, includes, ground net, ground resistance detection device, ground state monitoring devices concentrates collection part and state monitor terminal, ground resistance detection device and ground state monitoring devices with ground net series connection, ground resistance detection device and ground state monitoring devices parallel connection, ground resistance detection device detects the current ground resistance numerical value of circuit in real time, and ground state monitoring devices monitors the ground state information of current circuit in real time, concentrate collection part and be used for gathering the ground resistance numerical value and the ground state information of current circuit, and will ground resistance numerical value and ground state information upload to state monitor terminal, state monitor terminal is used for saving ground resistance numerical value and ground state information, its characterized in that: the ground resistance detection device, the ground state monitoring device and the ground net form a circuit loop, the ground resistance value detected by the ground resistance detection device is larger than a preset resistance threshold value, and the ground resistance detection device cuts off the electric connection of the circuit loop.

2. The electricity safety monitoring system according to claim 1, wherein: the grounding resistance detection device comprises a first grounding resistance detection device and a second grounding resistance detection device, the centralized acquisition component comprises a first centralized acquisition component and a second centralized acquisition component, the grounding state monitoring device comprises a first grounding state monitoring device and a second grounding state monitoring device, the first grounding resistance detection device is simultaneously and directly connected with two unconnected auxiliary grounding nets and a grounding net, the first grounding resistance detection device, the first grounding state monitoring device and the grounding grid form a first circuit loop, the first circuit loop is connected with the first acquisition component in series, the second grounding resistance detection device is connected with a grounding grid through a grounding device, the second grounding resistance detection device, the second grounding state monitoring device, the grounding device and the grounding network form a second circuit loop, and the second circuit loop is connected with the second acquisition component in series.

3. The electricity safety monitoring system according to claim 2, wherein: the number of the first grounding state monitoring devices is n, n is a positive integer larger than or equal to 1, the number of the second grounding state monitoring devices is m, and m is a positive integer larger than or equal to 1.

4. The electricity safety monitoring system according to claim 2, wherein: the grounding device comprises a grounding bar and/or a lightning protection ground wire.

5. The electricity safety monitoring system according to claim 2, wherein: the second grounding state monitoring device is connected with a grounding grid through an external device, and the external device comprises a distribution box, a grounding bar and electric equipment.

6. The electricity safety monitoring system according to claim 1, wherein: the ground resistance detection device, the ground state monitoring device, the centralized acquisition component and the state monitoring terminal further comprise a wireless data transmission component, and data transmission is carried out between the ground resistance detection device and the ground state monitoring device and between the centralized acquisition component and the state monitoring terminal through the wireless data transmission component.

7. A building, characterized by: comprising the first circuit loop of claim 2 and a second circuit loop, the first ground resistance detection device, the first ground state monitoring device and the ground net forming a first circuit loop; the second grounding resistance detection device, the second grounding state monitoring device, the grounding device and the grounding network form a second circuit loop, wherein the first circuit loop and the first centralized acquisition component form a first safety monitoring system; the second circuit loop and the second centralized acquisition component form a second safety monitoring system, the first safety monitoring system is installed on the ground floor of the building, and the second safety monitoring system is installed on other floors of the building.

8. The building of claim 7, wherein: the first circuit loop is connected with the first centralized acquisition component in series, the second circuit loop is connected with the second centralized acquisition component in series, and the first safety monitoring system is connected with the second safety monitoring system in parallel.

9. The building of claim 7, wherein: and when the first grounding state monitoring device monitors abnormal grounding state data, the electric connection of the first circuit loop is cut off, and when the second grounding state monitoring device monitors the abnormal grounding state data, the electric connection of the second circuit loop is cut off.

10. The building of claim 7, wherein: when the ground resistance value detected by the first ground resistance detection device is larger than a preset resistance threshold value, the first ground resistance detection device cuts off the electric connection of the first safety monitoring system, and when the ground resistance value detected by the second ground resistance detection device is larger than the preset resistance threshold value, the second ground resistance detection device cuts off the electric connection of the second safety monitoring system.

Technical Field

The invention belongs to the technical field of electricity utilization safety, and particularly relates to an electricity utilization safety monitoring system and a building thereof.

Background

Along with the development of modern society, the scale of intelligent building is expanding constantly, and the use of its inside various electrical apparatus is also increasing day by day, and especially computer network information technology's popularization, the building adopts various informationization electrical equipment more and more, this has brought the following new problem for intelligent building's electrical apparatus protection and ground connection:

1. the traditional low-voltage power supply system mainly emphasizes overload and short-circuit protection, and aims to protect electric equipment and a power supply line from being damaged. However, if a power supply system does not adopt reliable grounding measures or does not perform grounding according to the requirements of the lightning protection design specification of a building, but a low-voltage power distribution system grounding mode is mixed in the electrical design and construction process of the building, or the quality of electrical grounding does not meet the requirements, and no equipotential connection is performed on important electronic equipment, and the like, the electric shock accident is very easy to occur.

2. The measures of the protection zero-connection and overcurrent protection devices and the like arranged in the existing low-voltage distribution system can not completely and effectively prevent the occurrence of electric leakage fire, thereby causing frequent fire accidents of high-rise buildings.

3. Along with the use of a large amount of electrical equipment, the application of a leakage protector is also becoming popular day by day, the leakage protector is a protective electrical appliance which effectively prevents the ground fault from causing personal electric shock and electrical fire in a limited time, but the leakage protector cannot play a due role due to improper selection or incorrect wiring, and the reliability and the safety of a power supply system are reduced.

4. In the design of a low-voltage distribution system, when a low-voltage distribution circuit has a short-circuit fault of large short-circuit current, even if a high-level protection device of the three-stage protection circuit breaker is provided with short-circuit delay, the high-level protection circuit breaker cannot be selected to trip out in a bypassing manner, so that large-area power failure is caused, and even huge economic loss is caused sometimes.

Disclosure of Invention

In order to solve the problems in the background art, a first aspect of the present invention provides an electricity safety monitoring system, which monitors the resistance value and the grounding state of a grounding grid of a building in real time in all aspects, automatically cuts off the electrical connection of a circuit loop and sends an indication signal once the resistance value or the grounding state of the grounding grid occurs, thereby avoiding the situation that the electrical connection of the whole building is interrupted due to the abnormal resistance value or the grounding state of a certain grounding grid, protecting the safety of the electrical equipment of the building to the maximum extent, finding a fault occurrence point as soon as possible according to the indication signal, greatly saving the maintenance and repair costs, and avoiding the occurrence of accidents such as fire hazard, electric shock and the like caused by the irregular grounding during overload or short-circuit protection.

In order to achieve the above objects, the present invention provides, in one aspect, an electricity safety monitoring system including a ground net, a ground resistance detection device, a ground state monitoring device, a centralized collection component and a state monitoring terminal, wherein the ground resistance detection device and the ground state monitoring device are connected in series with the ground net, the ground resistance detection device and the ground state monitoring device are connected in parallel, the ground resistance detection device detects a current ground resistance value of a line in real time, the ground state monitoring device monitors ground state information of the current line in real time, the centralized collection component is configured to collect and upload the ground resistance value and the ground state information of the current line to the state monitoring terminal, the state monitoring terminal is configured to store the ground resistance value and the ground state information, the ground resistance detection device, the ground state monitoring device and the ground net form a circuit loop, the ground resistance value detected by the ground resistance detection device is larger than a preset resistance threshold value, and the ground resistance detection device cuts off the electric connection of the circuit loop.

Furthermore, the ground resistance detection device comprises a first ground resistance detection device and a second ground resistance detection device, the concentrated collection part comprises a first concentrated collection part and a second concentrated collection part, the ground state monitoring device comprises a first ground state monitoring device and a second ground state monitoring device, the first ground resistance detection device is simultaneously and directly connected with two unconnected auxiliary ground nets and a ground net, the first ground resistance detection device, the first ground state monitoring device and the ground net form a first circuit loop, the first circuit loop is connected with the first collection part in series, the second ground resistance detection device is connected with the ground net through the ground device, the second ground resistance detection device, the second ground state monitoring device, the ground device and the ground net form a second circuit loop, the second circuit loop is connected in series with the second acquisition component.

Preferably, the number of the first grounding state monitoring devices is n, and n is a positive integer greater than or equal to 1.

Preferably, the number of the second grounding state monitoring devices is m, and m is a positive integer greater than or equal to 1.

Preferably, the grounding device comprises a grounding bar and/or a lightning protection ground wire.

Preferably, the second grounding state monitoring device is connected with the grounding grid through an external device, and the external device comprises a distribution box, a grounding bar and electric equipment.

Furthermore, the ground resistance detection device, the ground state monitoring device, the centralized acquisition component and the state monitoring terminal further comprise a wireless data transmission component, and data transmission is performed between the ground resistance detection device and the ground state monitoring device and between the centralized acquisition component and the state monitoring terminal through the wireless data transmission component.

In a second aspect of the present invention, there is provided a building, including the above first circuit loop and second circuit loop, wherein the first ground resistance detection device, the first ground state monitoring device and the ground grid form a first circuit loop; the second grounding resistance detection device, the second grounding state monitoring device, the grounding device and the grounding network form a second circuit loop, wherein the first circuit loop and the first centralized acquisition component form a first safety monitoring system; the second circuit loop and the second centralized acquisition component form a second safety monitoring system, the first safety monitoring system is installed on the ground floor of the building, and the second safety monitoring system is installed on other floors of the building.

Further, the first circuit loop is connected in series with the first centralized acquisition component, the second circuit loop is connected in series with the second centralized acquisition component, and the first safety monitoring system is connected in parallel with the second safety monitoring system.

Further, when the first ground state monitoring device monitors abnormal ground state data, the electrical connection of the first circuit loop is cut off, and when the second ground state monitoring device monitors abnormal ground state data, the electrical connection of the second circuit loop is cut off.

Further, when the ground resistance value detected by the first ground resistance detection device is greater than a preset resistance threshold value, the first ground resistance detection device cuts off the electrical connection of the first safety monitoring system, and when the ground resistance value detected by the second ground resistance detection device is greater than the preset resistance threshold value, the second ground resistance detection device cuts off the electrical connection of the second safety monitoring system.

Compared with the prior art, the invention has the beneficial effects that:

1. according to the invention, by monitoring the ground resistance value and the grounding state information of the circuit in real time, once the circuit fails, the fault circuit is immediately powered off, the alarm can be given without waiting for the overload or short circuit of the circuit, and once the circuit fails to be grounded, the fault circuit is immediately powered off, so that the occurrence of electric shock accidents and electric fires is avoided, and the reliability and the safety of a power supply system are improved.

2. According to the invention, the first safety monitoring system is arranged on the ground floor of the building, so that the length of a connection circuit between the first safety monitoring system and the grounding grid and the auxiliary grounding grid is effectively saved, and the installation cost is saved.

3. According to the invention, the second safety monitoring system is arranged on the above-ground floor of the building, and the second safety monitoring system does not need to be directly connected with the grounding grid and the auxiliary grounding grid, so that the installation difficulty of the safety monitoring system is reduced.

4. According to the invention, the first safety monitoring system and the second safety monitoring system are connected in parallel, so that when the first safety monitoring system is in an abnormal state and the electric connection is cut off, the normal operation of the second safety monitoring system is not influenced.

5. The invention can flexibly set the preset resistance threshold value according to the actual requirements of customers, effectively reduces the situations of false alarm and missed alarm, reduces the maintenance cost and improves the customer experience.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.

Fig. 1 is a schematic structural diagram of an electricity safety monitoring system according to the present invention;

fig. 2 is a schematic structural diagram of a first embodiment of an electricity safety monitoring system according to the present invention;

fig. 3 is a schematic structural diagram of a second embodiment of an electricity safety monitoring system according to the present invention;

fig. 4 is a schematic structural diagram of a first ground resistance detection device of an electrical safety monitoring system according to the present invention.

Fig. 5 is a schematic structural diagram of a second ground resistance detection device of the electrical safety monitoring system according to the present invention.

Fig. 6 is a schematic diagram of an embodiment of an electricity safety monitoring system for a building according to the present invention.

Reference numerals:

a1 … … first safety monitoring system

A2 … … second safety monitoring system

A3 … … ground resistance detection device

A4 … … grounding state monitoring device

A5 … … centralized collecting component

A6 … … state monitoring terminal

A7 … … grounding grid

102 … … first grounding state monitoring device

103 … … first centralized collection component

104 … … auxiliary grounding grid

105 … … first grounding resistance detection device

201 … … external device

202 … … grounding device

203 … … second grounding resistance detection device

204 … … second ground state monitoring device

205 … … second centralized collection component

401 … … sound generating mechanism

402 … … lighting mechanism

403 … … first alarm assembly

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In order to facilitate understanding of the technical scheme of the invention, the related technical terms of the invention are explained as follows:

the grounding net is a general term for a grounding body which is composed of a plurality of metal grounding electrodes buried in the ground to a certain depth and a net structure formed by connecting the grounding electrodes by conductors. The novel shielding device is widely applied to industries such as electric power, buildings, computers, industrial and mining enterprises and communication, and plays roles in safety protection, shielding and the like.

And the auxiliary grounding grid adopts a mode that the electric conductor is directly contacted with the ground and is used for auxiliary testing of the resistance value of the grounding grid. The grounding grid can be constructed and installed together with the grounding grid, and can also be installed separately.

The ground resistance is smaller as better, the common standard is 4-10 ohms according to different requirements of equipment, the highest ground resistance cannot be larger than 10 ohms, and the ground resistance is better below 4 ohms.

The standard ground resistance specification requirements currently in force:

1. the independent lightning protection grounding resistance is not more than 10 ohms;

2. the independent safety protection grounding resistance is not more than 4 ohms;

3. the independent alternating current working grounding resistance is not more than 4 ohms;

4. the independent direct current working grounding resistance is not more than 4 ohms;

5. the common ground (joint ground) should be no more than 1 ohm.

The grounding bar is arranged on the equipment and connected with a copper plate of a grounding body and galvanized flat iron arranged along the wall of the power distribution room.

The lightning protection ground wire is positioned above the underground optical/cable, one or two pairs of bare wires are laid in parallel with the optical/cable, the bare wires are sufficiently grounded and are relatively close to a lightning point, the wire is necessarily one of targets to be struck as the optical/cable if the wire is not a primary target of lightning current attack, and therefore the wire buried above the optical/cable is called a buried optical/cable underground shielding wire and is generally called a drainage wire or a lightning protection ground wire.

The distribution box is a total circuit distribution box for all users.

As shown in fig. 2, the first ground resistance detecting device 105 directly detects the ground resistance by a three-point method, and the first ground resistance detecting device 105 needs to be connected to two unconnected auxiliary ground nets 104 and a ground net a7 at the same time, that is, three-point connection, to detect the ground resistance. The ground resistance detected by the first ground resistance detecting device 105 is highly accurate, but the installation requirement is relatively high because of the need for direct connection with the ground net a7 and the auxiliary ground net 104.

As shown in fig. 3, the second ground resistance detection device 203 detects the loop resistance by using a loop method, and the second ground resistance detection device 203 may be directly installed to detect the ground system forming the loop, and if the ground system forming the loop is not formed, the auxiliary ground net 104 needs to be added to form the loop, and then the second ground resistance detection device 203 is installed. Since the second ground resistance detection device 203 does not need to be directly connected to the ground net a7 and the auxiliary ground net 104, the installation requirements are relatively low.

The invention provides an electricity safety monitoring system in a first aspect, which comprises a grounding grid A7, a grounding resistance detection device A3, a grounding state monitoring device A4, a centralized acquisition component A5 and a state monitoring terminal A6.

Referring to fig. 1, the ground resistance detection device A3 and the ground state monitoring device a4 are connected in series with the ground grid a7, and the ground resistance detection device A3 is connected in parallel with the ground state monitoring device a 4.

Further, the grounding resistance detection device A3 detects the current grounding resistance value of the line in real time, the grounding state monitoring device a4 monitors the grounding state information of the current line in real time, and the centralized acquisition component a5 is configured to acquire the grounding state information monitored by the grounding state monitoring device a4 and the resistance value detected by the grounding resistance detection device A3.

Specifically, the ground state monitoring device a4 transmits the monitored ground state information to the centralized collection component a5, and the ground resistance detection device A3 also transmits the detected resistance value to the centralized collection component a 5.

In one embodiment, the centralized collection component a5 actively extracts current data of the ground condition monitoring device a4 and the ground resistance detection device A3.

Further, the centralized collecting component a5 uploads the collected grounding state information and the grounding resistance value to the state monitoring terminal a6, and the state monitoring terminal a6 stores the information, so that the user can conveniently check the information at any time.

The status monitor terminal a6 may be a PC, a mobile terminal, or another device having a storage function.

Further, the ground resistance detection device A3, the ground state monitoring device a4 and the ground grid a7 form an independent circuit loop, and when the ground resistance value detected by the ground resistance detection device A3 is greater than a preset resistance threshold value, the ground resistance detection device A3 cuts off the electrical connection of the circuit loop.

Specifically, the preset resistance threshold may be set according to an actual situation.

In one embodiment, the predetermined resistance threshold is 0 to 10 ohms. When the current ground resistance detected by the ground resistance detection device A3 is 11 ohms, the ground resistance detection device A3 automatically cuts off the electrical connection of the circuit loop, and when the current ground resistance detected by the ground resistance detection device A3 is 1 ohm, the ground resistance detection device A3 does not perform any action, and the circuit loop normally operates.

Further, the ground state monitoring device a4 detects an abnormal ground state, and the ground state monitoring device a4 disconnects the electrical connection of the circuit loop.

Specifically, ground connection state monitoring devices A4 includes opto-coupler and MCU, and ground connection state monitoring devices A4 power supply back can export voltage about 5V to ground net A7, and this voltage can pass through the opto-coupler of ground connection state monitoring devices A4 through the circuit return circuit, and MCU gathers the opto-coupler break-make state and judges ground connection state, and the state is for leading to the judgement result and be normal, and the state is for judging the judgement result and be unusual.

Further, the grounding state monitoring device a4 further comprises a third alarm component, the grounding state monitoring device a4 monitors that the grounding state is abnormal, and the third alarm component can send out a warning signal, so that the function of quickly finding a fault point can be achieved.

Specifically, the third warning assembly comprises a third sounding mechanism and a third lighting mechanism, and the warning signal is a sound warning signal and a lighting warning signal.

Further, the centralized collecting component a5 includes a second alarm component, and when the centralized collecting component a5 receives an abnormal ground resistance value or ground state information, the second alarm component sends an alarm signal.

Specifically, the second alarm assembly comprises a second sounding mechanism and a second lighting mechanism, and the alarm signal is a sound alarm signal and a lighting alarm signal.

Preferably, the second sound-generating mechanism is a speaker, and the second illuminating mechanism is an LED lamp.

Specifically, the centralized collecting component a5 receives all the ground resistance values or the ground state information, and as long as one of the ground resistance values or the ground state information is abnormal, the centralized collecting component a5 notifies the second alarm component to send an alarm signal, so that the user can find a line fault point conveniently.

In one embodiment, the grounding resistance value is 11 ohms, the grounding state information is normal, and the centralized acquisition component a5 informs the second alarm component to send out an alarm signal.

In the second embodiment, the ground resistance value is 0 ohm, the ground state information is normal, and the centralized collection component a5 does not perform any action.

In the third embodiment, the grounding resistance value is 1 ohm, the grounding state information is abnormal, and the centralized acquisition component a5 informs the second alarm component to send out an alarm signal.

Further, the ground resistance detection device A3, the ground state monitoring device a4, the centralized collection component a5 and the state monitoring terminal a6 further include a wireless data transmission component, the ground resistance detection device A3 and the ground state monitoring device a4 and the centralized collection component a5 are arranged between, and the centralized collection component a5 and the state monitoring terminal a6 are arranged between, and data transmission is performed through the wireless data transmission component.

Referring to fig. 2, the ground resistance detecting device A3 includes a first ground resistance detecting device 105, the centralized collecting component a5 includes a first centralized collecting component 103, the ground state monitoring device a4 includes a first ground state monitoring device 102, the first ground resistance detecting device 105 is connected to two unconnected auxiliary ground nets 104 and a ground net a7, and the first ground resistance detecting device 105 can detect the ground resistance of the ground net a7 in real time.

Specifically, the ground grid a7 is installed below the building and buried below the ground, a lightning protection ground wire connected to the ground grid a7 is installed in a wall of the building, and the first ground resistance detection device 105 and the first ground state monitoring device 102 are connected to the lightning protection ground wire.

Further, the first ground resistance detection device 105 is connected in parallel with the first ground state monitoring device 102.

Specifically, the number of the first grounding state monitoring devices 102 is n, where n is a positive integer greater than or equal to 1, and may be set according to the actual needs of the building.

Specifically, when the number of the first ground state monitoring devices 102 is greater than 1, the plurality of first ground state monitoring devices 102 are connected in parallel and are simultaneously connected in parallel with the first ground resistance detection device 105, and the first ground resistance detection device 105, the ground grid a7 and the first ground state monitoring devices 102 form a first circuit loop respectively.

Further, the first circuit loop is connected in series with the first centralized collecting component 103. Specifically, when the first ground resistance detection device 105 detects an abnormal resistance value, the first circuit is electrically disconnected.

Specifically, when the first ground state monitoring device 102 monitors an abnormal ground state, the first circuit loop is electrically disconnected.

Specifically, when the electrical connection of the first circuit loop is cut off, the first centralized collection component 103 sends out an alarm signal.

Referring to fig. 3, the ground resistance detecting device A3 includes a second ground resistance detecting device 203, the centralized collecting component a5 includes a second centralized collecting component 205, the ground state monitoring device a4 includes a second ground state monitoring device 204, and the second ground resistance detecting device 203 is connected to a ground grid a7 through a grounding device 202.

Specifically, the number of the second grounding state monitoring devices 204 is m, and m is a positive integer greater than or equal to 1, and can be set according to actual requirements.

Specifically, when the number of the second ground state monitoring devices 204 is greater than 1, the plurality of second ground state monitoring devices 204 are connected in parallel and are simultaneously connected in parallel with the second ground resistance detection device 203, and the second ground resistance detection device 203, the ground device 202, and the ground net a7 form a second circuit loop with the second ground state monitoring devices 204, respectively.

Specifically, the grounding device 202 may be a grounding bar, a lightning protection ground wire, or both.

Specifically, the second ground resistance detection device 203, the second ground state monitoring device 204, the grounding device 202 and the ground net a7 form a second circuit loop.

Specifically, the second circuit loop is connected in series with the second centralized collecting unit 205.

Further, the grounding state monitoring device a4 can also be connected to the grounding grid a7 through the external device 201.

Preferably, the external device 201 may be a distribution box, a ground bar, or an electric device, and may be connected and installed according to actual requirements.

Further, the ground resistance detection device a3 further includes a first alarm component 403.

Specifically, when the second ground resistance detection device 203 detects an abnormal resistance value, the second circuit is electrically disconnected.

Specifically, when the second ground state monitoring device 204 monitors an abnormal ground state, the second circuit loop is electrically disconnected. Specifically, when the electrical connection of the second circuit loop is cut off, the second centralized collection component 205 will send out an alarm signal.

Referring to fig. 4, the first ground resistance detection device 105 further includes a first alarm component 403.

Specifically, the first ground resistance detection device 105 includes 19 ports, wherein the 1 st and 2 nd ports are connected to an external dc power supply, the 3 rd and 4 th ports are RS232 ports for being connected with a centralized collection component a5 of a corresponding port, the 6 th, 7 th and 8 th ports are used for transmitting first-generation mobile communication signals, i.e., 2.5G mobile communication signals, the 9 th, 10 th and 11 th ports are RS485 interfaces for being connected with a centralized collection component a5 of a corresponding port, the 12 th, 13 th, 14 th and 15 th ports are reserved ports, the 16 th and 17 th ports are respectively connected to the auxiliary ground network 104, the 18 th port is connected to the network a7, and the 19 th port is used for grounding of an external dc power supply.

Further, when the ground resistance value detected by the first ground resistance detecting device 105 is greater than the preset resistance threshold value, the first alarm component 403 sends an indication signal.

Specifically, the first alarm assembly 403 includes a sounding mechanism 401 and an illuminating mechanism 402, and the indication signals are a sound indication signal and an illumination indication signal.

Specifically, the sound generating mechanism 401 is a speaker, and the illuminating mechanism 402 is an LED lamp.

Furthermore, the illuminating mechanism further comprises a digital display unit, and the digital display unit can visually display the current grounding resistance value, so that a user can conveniently check the current grounding resistance value.

Specifically, referring to fig. 5, the second ground resistance detection device 203 also includes a first alarm component 403.

Specifically, the second ground resistance detection device 203 includes 4 connection ports, where the 51 st and 52 th ports are connected to an external dc power supply for supplying power to the second ground resistance detection device 203, and the 53 th and 54 th ports are signal line connection ports.

In one embodiment, the 4 wiring ports of the second ground resistance detection device 203 are provided with different colors for easy differentiation.

Specifically, when the ground resistance value detected by the second ground resistance detection device 203 is greater than the preset resistance threshold value, the first alarm component 403 sends an indication signal.

Preferably, the first alarm assembly 403 includes a sound emitting mechanism 401 and an illuminating mechanism 402, and the indication signals are a sound indication signal and an illumination indication signal.

Preferably, the sound generating mechanism 401 is a speaker, and the illuminating mechanism 402 is an LED lamp.

Further, the lighting mechanism 402 further comprises a digital display unit, and the digital display unit can visually display the current grounding resistance value, so that a user can conveniently check the current grounding resistance value.

Referring to fig. 6, in a second aspect of the present invention, a building is provided, which includes a first safety monitoring system a1 and a second safety monitoring system a2, wherein the first safety monitoring system a1 includes a first circuit loop, the second safety monitoring system a2 includes a second circuit loop, and the first ground resistance detection device 105, the first ground state monitoring device 102, and the ground net a7 form a first circuit loop; the second grounding resistance detection device 203, the second grounding state monitoring device 204, the grounding device 202 and the grounding grid A7 form a second circuit loop, wherein the first circuit loop and the first centralized acquisition component 103 form a first safety monitoring system A1; the second circuit loop and the second centralized collection component 205 form a second safety monitoring system a2, the first safety monitoring system a1 is installed on the ground floor of the building, and the second safety monitoring system a2 is installed on other floors of the building.

Specifically, the first circuit loop is connected in series with the first centralized collection unit 103, the second circuit loop is connected in series with the second centralized collection unit 205, and the first safety monitoring system a1 and the second safety monitoring system a2 are connected in parallel. In this way, the circuit switching of the first safety monitoring system a1 and the second safety monitoring system a2 will not affect each other.

Specifically, when the first ground state monitoring device 102 monitors abnormal ground state data, the electrical connection of the first circuit loop is cut off.

Specifically, the number of the first grounding state monitoring devices 102 is n, where n is a positive integer greater than or equal to 1.

Specifically, when the number of the first ground state monitoring devices 102 is greater than 1, the plurality of first ground state monitoring devices 102 are connected in parallel and are simultaneously connected in parallel with the first ground resistance detection device 105, and the first ground resistance detection device 105, the ground grid a7 and the first ground state monitoring devices 102 form a first circuit loop respectively.

Specifically, when the ground resistance value detected by the first ground resistance detection device 105 is greater than a preset resistance threshold value, the first ground resistance detection device 105 cuts off the electrical connection of the first safety monitoring system a 1.

Specifically, the preset resistance threshold value is 0-10 ohms. When the current ground resistance detected by the first ground resistance detection device 105 is 11 ohms, the first ground resistance detection device 105 will automatically disconnect the electrical connection of the first safety monitoring system a1, and when the current ground resistance detected by the first ground resistance detection device 105 is 1 ohm, the first ground resistance detection device 105 will not perform any action, and the first safety monitoring system a1 will normally operate.

Further, when the second ground state monitoring device 204 monitors the abnormal ground state data, the electrical connection of the second circuit loop is cut off.

Specifically, the number of the second grounding state monitoring devices 204 is m, where m is a positive integer greater than or equal to 1.

Specifically, when the number of the second ground state monitoring devices 204 is greater than 1, the plurality of second ground state monitoring devices 204 are connected in parallel and are simultaneously connected in parallel with the second ground resistance detection device 203, and the second ground resistance detection device 203, the ground device 202, and the ground net a7 form a second circuit loop with the second ground state monitoring devices 204, respectively.

Specifically, when the ground resistance value detected by the second ground resistance detection device 203 is greater than a preset resistance threshold value, the second ground resistance detection device 203 disconnects the electrical connection of the second safety monitoring system a 2.

Further, the first circuit loop and the second circuit loop are respectively connected in series with the centralized collecting component a 5.

Specifically, the first circuit loop is connected in series with the first centralized collecting component 103, and the second circuit loop is connected in series with the second centralized collecting component 205.

Further, the first centralized acquisition component 103 and the second centralized acquisition component 205 also include a second alarm component.

Further, when the first centralized collecting component 103 or the second centralized collecting component 205 collects the abnormal ground resistance value or the abnormal ground state information, the second alarm component will send out an alarm signal.

Further, the first ground resistance detecting device 105 and the second ground resistance detecting device 203 further include a first alarm component 403.

The working principle and the using process of the invention are as follows:

according to the electricity safety monitoring system and the building thereof, the grounding resistance detection device A3, the grounding state monitoring device A4 and the grounding grid A7 form an independent circuit loop, when the circuit loop is abnormal, the circuit loop can be automatically powered off, the circuit state is automatically monitored, the uninterrupted monitoring circuit is achieved, once the abnormality occurs, the power can be immediately powered off, and the electricity safety of the whole line of the building is protected; because the monitoring circuit is an independent circuit loop, the on-off of the circuit is not influenced, the power failure of the whole building caused by abnormal connection at a certain point can be avoided, and the maintenance cost is saved; and as long as one abnormity exists between the grounding state and the grounding resistance, the circuit can be powered off, the possibility of false alarm and missing alarm is effectively reduced, and once the abnormity occurs, a signal can be sent out, so that a user can be helped to quickly find out the fault occurrence place, the maintenance cost is greatly reduced, and meanwhile, the accidents of fire, electric shock and the like caused by the irregular grounding during overload or short-circuit protection can be avoided.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

It will be apparent to those skilled in the art that, for convenience and brevity of description, only the above-mentioned division of the functional units and modules is illustrated, and in practical applications, the above-mentioned function distribution may be performed by different functional units and modules according to needs, that is, the internal structure of the system is divided into different functional units or modules to perform all or part of the above-mentioned functions. Each functional unit and module in the embodiments may be integrated in one processing unit, or each unit may exist alone physically, or two or more units are integrated in one unit, and the integrated unit may be implemented in a form of hardware, or in a form of software functional unit. In addition, specific names of the functional units and modules are only for convenience of distinguishing from each other, and are not used for limiting the protection scope of the present application. The specific working processes of the units and modules in the wireless terminal may refer to the corresponding processes in the foregoing embodiments, and are not described herein again.

In the above embodiments, the descriptions of the respective embodiments have respective emphasis, and reference may be made to the related descriptions of other embodiments for parts that are not described or illustrated in a certain embodiment.

Those of ordinary skill in the art will appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware or combinations of computer software and electronic hardware. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the implementation. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present invention.

In the embodiments provided in the present invention, it should be understood that the disclosed system/terminal device and connection method may be implemented in other manners. For example, the above-described system/terminal device embodiments are merely illustrative, and for example, the division of the modules or units is only one logical division, and there may be other divisions when actually implemented, for example, multiple units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, systems or units, and may be in an electrical, mechanical or other form.

The above-mentioned embodiments are only used for illustrating the technical solutions of the present invention, and not for limiting the same; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not substantially depart from the spirit and scope of the embodiments of the present invention, and are intended to be included within the scope of the present invention.