CN111045357A - Self-closing system of power communication cabinet - Google Patents
Self-closing system of power communication cabinet Download PDFInfo
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- CN111045357A CN111045357A CN201911109902.8A CN201911109902A CN111045357A CN 111045357 A CN111045357 A CN 111045357A CN 201911109902 A CN201911109902 A CN 201911109902A CN 111045357 A CN111045357 A CN 111045357A
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B19/00—Programme-control systems
- G05B19/02—Programme-control systems electric
- G05B19/04—Programme control other than numerical control, i.e. in sequence controllers or logic controllers
- G05B19/042—Programme control other than numerical control, i.e. in sequence controllers or logic controllers using digital processors
- G05B19/0428—Safety, monitoring
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B2219/00—Program-control systems
- G05B2219/20—Pc systems
- G05B2219/24—Pc safety
- G05B2219/24215—Scada supervisory control and data acquisition
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Abstract
The invention provides a self-closing system of a power communication cabinet. And when the temperature is higher than a fixed value, the fan is started to accelerate heat dissipation, and the temperature and the image information are transmitted to the remote terminal at fixed time. By adjusting the smoke concentration detection period and calculating the ratio of the electric signal increment caused by the first transmitting signal to the second transmitting signal, the smoke type is judged, so that the smoke sensor can select different adjusting modes to adjust the smoke alarm threshold value according to different smoke types before alarming, and if the smoke sensor is not smoke generated by fire, the smoke alarm threshold value is improved, the sensitivity of the smoke sensor is reduced, and false alarm of the smoke sensor is avoided. Working environment indexes in the electric power cabinet can be collected in real time through each sensor and collector, so that monitoring personnel can know the environment condition in the electric power cabinet in time; the monitoring center is connected with the monitoring terminal, so that remote monitoring can be realized; monitoring center alarm module can in time inform the inside environmental problem of control personnel electric power cabinet.
Description
Technical Field
The invention belongs to the technical field of power control systems, and particularly relates to a self-closing system of a power communication cabinet.
Background
At present, a general power communication cabinet is not provided with a monitoring system, the condition of a wire connector can be known only by checking on the spot, the wire connector and a wire connecting assembly are easy to rust and damage, a wire connecting switch is damaged, even the wiring is unstable, and the power transmission is influenced.
The problem of too high temperature generally exists in the power communication rack, and the reliability of electronic components operation in the rack is influenced easily to the temperature lasts too high. The common temperature control mode is air-cooled heat dissipation, air-conditioned cooling and the like, and the general fan has low air-blowing heat dissipation efficiency and unsatisfactory cooling effect; and the air conditioner refrigeration cooling mode has high energy consumption, and is not beneficial to energy conservation and environmental protection. Therefore, the problem of the most concern in the power communication industry at present is to find a reliable, efficient and low-cost cabinet heat dissipation scheme. When the electric power cabinet works, a large amount of heat is generated inside the electric power cabinet, and if the heat is not dissipated timely, certain influence is caused on the operation of devices inside the electric power cabinet; because the power cabinet is generally provided with heat dissipation holes for heat dissipation, dust must enter the power cabinet in the long-term storage process of the power cabinet, and if the power cabinet is not cleaned in time, the more the dust is accumulated, the damage to the internal devices of the power cabinet can be caused; the burden of workers can be greatly increased if people are dispatched to the existing electric power cabinet to monitor the electric power cabinet all the time.
Because the cabinet body protective effect is limited, the environment is abominable, the wind and rain is exposed to the sun, ponding snow etc., environmental change is violent, lead to the damage of electrical equipment easily, the internal portion of cabinet is equipped with a large amount of electric power parts, because electric power cabinet during operation, inside will produce a large amount of heats, therefore, must set up the heat dissipation window on the lateral wall of electric power cabinet, but only dispel the heat through the heat dissipation window, the effect is not good, can't reliably regulate and control the inside humiture of electric power cabinet, cause electric power part trouble easily, because electric power cabinet is in large quantity, can't monitor the internal environment of cabinet in real time, consequently, electric power cabinet not only short-lived in-service life still causes irrecoverable loss easily in the use, especially in the high.
Disclosure of Invention
The technical problem to be solved by the invention is to provide a self-closing system of an electric power communication cabinet, which detects the temperature condition in the cabinet body through a sensor, controls a cooling fan to work when the temperature exceeds a preset value, can realize communication connection with a remote terminal, monitors the working condition of the electric power communication cabinet in real time, is favorable for ensuring the stability of equipment operation, and avoids various faults and hidden dangers caused by unstable heat management.
In order to achieve the above purposes, the technical scheme adopted by the invention is as follows: the utility model provides a self-closing system of power communication rack, includes the communication rack body, the communication rack body includes top lid body, curb plate body and bottom plate body install radiating groove A around the top lid body install radiating groove B around the bottom plate body processing has a plurality of heat dissipation windows on the top lid body, the communication rack body is including cooling module 1, surveillance center, human response module 4 and remote terminal 3:
the monitoring center comprises a main control module 21 and a wireless communication module 22, and is used for monitoring the environmental information of the communication cabinet, acquiring monitoring data and sending the monitoring data to the main control module 21;
the main control module 21 is configured to receive monitoring data sent by the monitoring center, and if the monitoring data is abnormal, the main control module 21 sends abnormal information to a user;
the wireless communication module 22 is connected with the main control module 21 and the remote terminal 3 through the internet, and is used for realizing the communication between the main control module 21 and the remote terminal 3;
the cooling module 1 comprises a heat absorber, a radiator, a first cooling fan arranged on the heat absorber and a second cooling fan arranged on the radiator, the heat absorber and the radiator are respectively arranged on the inner side and the outer side of the communication cabinet body, a closed heat transfer loop is formed between the heat absorber and the radiator, and the first cooling fan and the second cooling fan are in signal connection with the main control module 21;
the human body induction module 4 is connected with the main control module 21 and used for detecting whether people approach or leave and sending personnel approach information or personnel leave information to the main control module 21.
In the self-closing system of the power communication cabinet, the number of the monitoring centers is at least one, and each monitoring center comprises a smoke monitoring module 23, a temperature monitoring module, a smoke sensor electrically connected with the smoke monitoring module 23, a temperature sensor electrically connected with the temperature monitoring module, and a signal connecting module.
In the self-closing system of the power communication cabinet, the smoke monitoring module 23 includes:
the detection period adjusting unit 24 is configured to adjust a current detection period of the smoke sensor to a fast detection period when it is detected that the current smoke concentration meets a set concentration threshold, so as to accelerate the detection frequency of the smoke concentration;
a ratio calculation unit 25 for calculating a ratio of an electric signal increment caused by the first transmission signal to an electric signal increment caused by the second transmission signal;
the threshold value adjusting unit 26 is used for increasing the smoke alarm threshold value of the smoke sensor when the smoke is judged to be not generated by fire according to the ratio; the first transmit signal is at a different wavelength than the second transmit signal.
In the self-closing system of the power communication cabinet, the first transmitting signal and the second transmitting signal are visible light or infrared light.
In the self-closing system of the power communication cabinet, the remote terminal 3 comprises a server, a short message receiving and sending module and an alarm module, and the short message receiving and sending module and the alarm module are in signal connection with the server.
In the self-closing system of the power communication cabinet, the main control module 21 includes a control unit, and a data conversion module, a GSM module and a WIFI communication module which are respectively connected to the control unit, and the main control module 21 is wirelessly connected to the wireless communication module 22 through the WIFI communication module.
A monitoring method of a self-closing system of a power communication cabinet comprises the following steps:
step A, detecting whether a person approaches or leaves, and monitoring environmental information of the communication cabinet by a monitoring center to obtain monitoring data and send the monitoring data to a main control module;
b, the main control module receives the monitoring data sent by the monitoring center, extracts effective data, compares the data with a corresponding standard value, judges that the environment in the electric power cabinet is abnormal, and sends abnormal information to a user if the monitoring data is abnormal;
and step C, the user sends an operation command to the main control module through the remote terminal through the Internet and the wireless communication module, the main control module forwards the operation command to the alarm module, and the monitoring center sends an alarm signal outwards and sends emergency notice to the field monitoring personnel of the electric power cabinet.
In the monitoring method for the self-closing system of the power communication cabinet, the step a includes a step a1, if a person approaches, an opening instruction is sent to the control module to open the cabinet door of the communication cabinet, otherwise, the cabinet door of the communication cabinet is closed.
In the monitoring method for the self-closing system of the power communication cabinet, the step B includes a step B1, and the monitoring center monitors whether smoke is generated inside the communication cabinet.
In the monitoring method for the self-closing system of the power communication cabinet, the step B further includes a step B2, where if smoke is generated, it is detected whether the current smoke concentration meets a set concentration threshold.
In the above monitoring method for a self-shutdown system of a power communication cabinet, the step B further includes:
step B3, if the current smoke concentration meets the set concentration threshold, adjusting the current detection period of the smoke sensor to a quick detection period, and accelerating the detection frequency of the smoke concentration;
step B4, calculating the ratio of the electric signal increment caused by the first transmitting signal to the electric signal increment caused by the second transmitting signal;
and step B5, when the smoke is judged to be not generated by fire according to the ratio, the smoke alarm threshold value of the smoke sensor is increased.
The invention has the advantages that: the self-closing system of the electric power communication cabinet starts the fan to accelerate heat dissipation when the temperature is higher than a fixed value, transmits the temperature and image information to the remote terminal at fixed time, and the remote terminal achieves the purpose of remotely monitoring the electric power communication cabinet by comparing and analyzing the temperature and smoke. The smoke concentration detection period is adjusted, the smoke detection frequency is accelerated, the smoke type is judged by calculating the ratio of the electric signal increment caused by the first transmitting signal to the second transmitting signal, so that the smoke sensor can select different adjusting modes to adjust the smoke alarm threshold value of the smoke sensor before alarming, if the smoke sensor generates smoke in a non-fire disaster, the smoke alarm threshold value is improved, the sensitivity of the smoke sensor is further reduced, and false alarm of the smoke sensor is avoided. Working environment indexes in the electric power cabinet can be collected in real time through each sensor and collector, so that monitoring personnel can know the environment condition in the electric power cabinet in time; the monitoring center is connected with the monitoring terminal, so that remote monitoring can be realized; monitoring center alarm module can in time inform the inside environmental problem of control personnel electric power cabinet.
Drawings
Fig. 1 is a schematic structural diagram of a self-closing system of a power communication cabinet according to the present invention.
Detailed Description
The following description is presented to disclose the invention so as to enable any person skilled in the art to practice the invention. The preferred embodiments in the following description are given by way of example only, and other obvious variations will occur to those skilled in the art.
Referring to fig. 1, the invention provides a self-closing system of a power communication cabinet, which comprises a communication cabinet body, wherein the communication cabinet body comprises a top cover body, a side plate body and a bottom plate body, heat dissipation grooves a are arranged on the periphery of the top cover body, heat dissipation grooves B are arranged on the periphery of the bottom plate body, a plurality of heat dissipation windows are processed on the top cover body, and the communication cabinet body comprises a cooling module 1, a monitoring center, a human body induction module 4 and a remote terminal 3:
the monitoring center comprises a main control module 21 and a wireless communication module 22, and is used for monitoring the environmental information of the communication cabinet, acquiring monitoring data and sending the monitoring data to the main control module 21;
the main control module 21 is configured to receive monitoring data sent by the monitoring center, and if the monitoring data is abnormal, the main control module 21 sends abnormal information to a user;
the wireless communication module 22 is connected with the main control module 21 and the remote terminal 3 through the internet, and is used for realizing the communication between the main control module 21 and the remote terminal 3;
the cooling module 1 comprises a heat absorber, a radiator, a first cooling fan arranged on the heat absorber and a second cooling fan arranged on the radiator, the heat absorber and the radiator are respectively arranged on the inner side and the outer side of the communication cabinet body, a closed heat transfer loop is formed between the heat absorber and the radiator, and the first cooling fan and the second cooling fan are in signal connection with the main control module 21;
the human body induction module 4 is connected with the main control module 21 and used for detecting whether people approach or leave and sending personnel approach information or personnel leave information to the main control module 21.
The human body induction module 4 comprises at least one of an infrared induction switch, a microwave induction switch or an ultrasonic induction switch.
Further, in a preferred embodiment of the self-closing system of the power communication cabinet, the number of the monitoring centers is at least one, and the monitoring center includes a smoke monitoring module 23, a temperature monitoring module, a smoke sensor electrically connected to the smoke monitoring module 23, a temperature sensor electrically connected to the temperature monitoring module, and a signal connection module.
Further, in a preferred embodiment of the self-closing system of the power communication cabinet of the present invention, the smoke monitoring module 23 includes:
the detection period adjusting unit 24 is configured to adjust a current detection period of the smoke sensor to a fast detection period when it is detected that the current smoke concentration meets a set concentration threshold, so as to accelerate the detection frequency of the smoke concentration;
and the ratio calculation unit 25 is used for calculating the ratio of the electric signal increment caused by the first transmitting signal to the electric signal increment caused by the second transmitting signal, the receiving signal value generated by the signal receiver after the two transmitters transmit the signals is relatively fixed under clean air, after smoke enters the sensor, the receiving electric signal generated by the receiver after the transmitters transmit the signals is increased, and the higher the smoke concentration is, the larger the electric signal is until the electric signal is saturated. Because the wavelengths of the signals emitted by the two transmitters are different, the electric signal increment generated by the same smoke is different, and the electric signal increments of the two transmitters form a certain fixed ratio; meanwhile, due to the fact that different smoke particles are different in size, signal increment values generated by the same type of emission signal are different, so that different ratios are generated for received electric signal increments generated by a signal receiver after two signal emitters emit signals for different types of smoke, and different types of smoke can be distinguished according to the ratios;
the threshold value adjusting unit 26 is used for increasing the smoke alarm threshold value of the smoke sensor when the smoke is judged to be not generated by fire according to the ratio; the first transmit signal is at a different wavelength than the second transmit signal.
Further, in a preferred embodiment of the self-closing system of the power communication cabinet, the first transmitting signal and the second transmitting signal are visible light or infrared light. The smoke sensor includes: a first signal transmitter; a second signal transmitter and a signal receiver for receiving signals transmitted by the first signal transmitter and the second signal transmitter; the first signal emitter emits a signal having a different wavelength than the signal emitted by the second signal emitter.
The first signal transmitter and the second signal transmitter may be referred to as a first signal transmitting tube and a second signal transmitting tube, respectively, and the signal receiver may be referred to as a signal receiving tube. The first signal emitter may be an infrared emitting tube or a visible light emitting tube, and the second signal emitter may be an infrared emitting tube or a visible light emitting tube. The visible light may be a red LED emitter tube, a blue LED emitter tube, or the like.
The smoke concentration detection period is adjusted, the smoke detection frequency is accelerated, the smoke type is judged by calculating the ratio of the electric signal increment caused by the first emission signal and the second emission signal, so that the smoke sensor can select different adjusting modes to adjust the smoke alarm threshold value of the smoke sensor before alarming, and if the smoke sensor is not the smoke generated by fire, the smoke alarm threshold value is improved, the sensitivity of the smoke sensor is further reduced, and false alarm of the smoke sensor is avoided; different smoke types can be identified, different alarm modes can be selected, and the problem of false alarm of the smoke sensor is solved.
Further, in a preferred embodiment of the self-shutdown system of the power communication cabinet of the present invention, the remote terminal 3 includes a server, a short message transceiver module and an alarm module, and both the short message transceiver module and the alarm module are in signal connection with the server.
Further, in a preferred embodiment of the self-shutdown system of the power communication cabinet, the main control module 21 includes a control unit, and a data conversion module, a GSM module, and a WIFI communication module that are respectively connected to the control unit, and the main control module 21 is wirelessly connected to the wireless communication module 22 through the WIFI communication module.
A monitoring method for a self-closing system of a power communication cabinet, the self-closing system of the power communication cabinet according to any one of the above, comprising the following steps:
a, a monitoring center monitors the environment information of a communication cabinet, acquires monitoring data and sends the monitoring data to a main control module;
b, the main control module receives the monitoring data sent by the monitoring center, extracts effective data, compares the data with a corresponding standard value, judges that the environment in the electric power cabinet is abnormal, and sends abnormal information to a user if the monitoring data is abnormal;
and step C, the user sends an operation command to the main control module through the remote terminal through the Internet and the wireless communication module, the main control module forwards the operation command to the alarm module, and the monitoring center sends an alarm signal outwards and sends emergency notice to the field monitoring personnel of the electric power cabinet.
Further, in a preferred embodiment of the monitoring method for the self-closing system of the power communication cabinet, the step a includes a step a1, and the monitoring center monitors whether smoke is generated inside the communication cabinet.
Further, in a preferred embodiment of the monitoring method for the self-closing system of the power communication cabinet, step a further includes step a2, if smoke is generated, it is detected whether the current smoke density meets a set density threshold.
Further, in a preferred embodiment of the monitoring method for a self-shutdown system of a power communication cabinet of the present invention, the step a further includes:
step A3, if the current smoke concentration meets the set concentration threshold, adjusting the current detection period of the smoke sensor to a quick detection period, and accelerating the detection frequency of the smoke concentration;
step A4, calculating the ratio of the electric signal increment caused by the first transmitting signal to the electric signal increment caused by the second transmitting signal;
and A5, when the smoke is judged to be not generated by fire according to the ratio, the smoke alarm threshold of the smoke sensor is increased.
The temperature sensor and the smoke sensor are used for respectively acquiring the temperature and the smoke in the electric power cabinet, the single chip microcomputer receives the information acquired by each sensor and each collector and processes the information and transmits the information to the monitoring center, if any sensor or collector does not accord with the preset value, the alarm module is controlled to give an alarm, and meanwhile, after the server of the monitoring center receives the information which does not accord with the preset value, the alarm module gives an alarm, and meanwhile, the short message module sends a short message to monitoring personnel of the electric power cabinet to inform the monitoring personnel of the electric power cabinet of rapid processing. According to the invention, the working environment indexes in the electric power cabinet can be collected in real time through each sensor and collector, so that monitoring personnel can know the environment condition in the electric power cabinet in time; the invention can realize remote monitoring by connecting the monitoring center with the monitoring terminal.
According to the self-closing system of the power communication cabinet, the fan is started to accelerate heat dissipation when the temperature is higher than a fixed value, the temperature, the humidity and the image information are transmitted to the remote terminal at fixed time, the remote terminal monitors the connector lug and the connector lug assembly by comparing and analyzing the temperature, the humidity and the image information, rusty connector lug and rusty connector lug assembly are found in time, and the purpose of remotely monitoring the power communication cabinet is achieved. The system realizes remote monitoring of the power communication cabinet, is beneficial to finding and maintaining rusty connector lug and connector lug assembly, and avoids damage of a connector switch and unstable power transmission. Working environment indexes in the electric power cabinet can be collected in real time through each sensor and collector, so that monitoring personnel can know the environment condition in the electric power cabinet in time; the monitoring center is connected with the monitoring terminal, so that remote monitoring can be realized; monitoring center alarm module can in time inform the inside environmental problem of control personnel electric power cabinet.
The foregoing shows and describes the general principles, essential features, and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are merely illustrative of the principles of the invention, but that various changes and modifications may be made without departing from the spirit and scope of the invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (10)
1. The utility model provides a self-closing system of power communication rack, includes the communication rack body, the communication rack body includes top lid body, curb plate body and bottom plate body install radiating groove A around the top lid body install radiating groove B around the bottom plate body processing has a plurality of heat dissipation windows on the top lid body, its characterized in that, the communication rack body is including cooling module, surveillance center, human response module and remote terminal:
the monitoring center comprises a main control module and a wireless communication module and is used for monitoring the environmental information of the communication cabinet, acquiring monitoring data and sending the monitoring data to the main control module;
the main control module is used for receiving the monitoring data sent by the monitoring center, and if the monitoring data is abnormal, the main control module sends abnormal information to the user;
the wireless communication module is connected with the main control module, is connected with the remote terminal through the internet and is used for realizing the communication between the main control module and the remote terminal;
the cooling module comprises a heat absorber, a radiator, a first cooling fan arranged on the heat absorber and a second cooling fan arranged on the radiator, the heat absorber and the radiator are respectively arranged on the inner side and the outer side of the communication cabinet body, a closed heat transfer loop is formed between the heat absorber and the radiator, and the first cooling fan and the second cooling fan are in signal connection with the main control module;
the human body sensing module is connected with the main control module and used for detecting whether a person approaches or leaves and sending person approaching information or person leaving information to the main control module.
2. A power communication cabinet self-closing system as claimed in claim 1, wherein the number of said monitoring centers is at least one, and said monitoring centers comprise a smoke monitoring module, a temperature monitoring module, a smoke sensor electrically connected to said smoke monitoring module, a temperature sensor electrically connected to said temperature monitoring module and a signal connection module.
3. A power communication cabinet self-closing system as claimed in claim 2, wherein said smoke monitoring module comprises:
the detection period adjusting unit is used for adjusting the current detection period of the smoke sensor to a quick detection period when the current smoke concentration is detected to meet a set concentration threshold value, so that the detection frequency of the smoke concentration is accelerated;
a ratio calculation unit for calculating a ratio of an electric signal increment caused by the first transmission signal to an electric signal increment caused by the second transmission signal;
the threshold value adjusting unit is used for increasing the smoke alarm threshold value of the smoke sensor when the smoke is judged to be not generated by fire according to the ratio; the first transmit signal is at a different wavelength than the second transmit signal.
4. The self-closing system of an electric power communication cabinet as claimed in claim 1, wherein the remote terminal comprises a server, a short message transceiver module and an alarm module, and the short message transceiver module and the alarm module are both in signal connection with the server.
5. The self-closing system of a power communication cabinet as claimed in claim 1, wherein the main control module comprises a control unit, and a data conversion module, a GSM module and a WIFI communication module respectively connected to the control unit, and the main control module is wirelessly connected to the wireless communication module through the WIFI communication module.
6. A method for monitoring a self-closing system of a power communication cabinet, the self-closing system of a power communication cabinet according to any one of the preceding claims, comprising the following steps:
step A, detecting whether a person approaches or leaves, and monitoring environmental information of the communication cabinet by a monitoring center to obtain monitoring data and send the monitoring data to a main control module;
b, the main control module receives the monitoring data sent by the monitoring center, extracts effective data, compares the data with a corresponding standard value, judges that the environment in the electric power cabinet is abnormal, and sends abnormal information to a user if the monitoring data is abnormal;
and step C, the user sends an operation command to the main control module through the remote terminal through the Internet and the wireless communication module, the main control module forwards the operation command to the alarm module, and the monitoring center sends an alarm signal outwards and sends emergency notice to the field monitoring personnel of the electric power cabinet.
7. The monitoring method for the self-closing system of the power communication cabinet as claimed in claim 6, wherein the step A comprises the step A1 of sending an opening command to the control module to open the cabinet door of the communication cabinet if a person approaches the control module, and otherwise closing the cabinet door of the communication cabinet.
8. A method for monitoring a self-closing system of a power communication cabinet as claimed in claim 6, wherein said step B comprises a step B1, said monitoring center monitors whether smoke is generated inside said communication cabinet.
9. The method for monitoring the self-closing system of the power communication cabinet as claimed in claim 8, wherein the step B further comprises a step B2 of detecting whether the current smoke density meets the set density threshold if smoke is generated.
10. The method for monitoring the self-closing system of the power communication cabinet as claimed in claim 9, wherein the step B further comprises:
step B3, if the current smoke concentration meets the set concentration threshold, adjusting the current detection period of the smoke sensor to a quick detection period, and accelerating the detection frequency of the smoke concentration;
step B4, calculating the ratio of the electric signal increment caused by the first transmitting signal to the electric signal increment caused by the second transmitting signal;
and step B5, when the smoke is judged to be not generated by fire according to the ratio, the smoke alarm threshold value of the smoke sensor is increased.
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| CN201911109902.8A CN111045357A (en) | 2019-11-14 | 2019-11-14 | Self-closing system of power communication cabinet |
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| CN201911109902.8A CN111045357A (en) | 2019-11-14 | 2019-11-14 | Self-closing system of power communication cabinet |
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| CN118015778A (en) * | 2024-04-08 | 2024-05-10 | 山东引领电子科技有限公司 | Remote fire alarm device and method based on Internet of things |
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