CN210244552U - Wireless monitoring fire-fighting device for electric power cabinet - Google Patents

Wireless monitoring fire-fighting device for electric power cabinet Download PDF

Info

Publication number
CN210244552U
CN210244552U CN201921749824.3U CN201921749824U CN210244552U CN 210244552 U CN210244552 U CN 210244552U CN 201921749824 U CN201921749824 U CN 201921749824U CN 210244552 U CN210244552 U CN 210244552U
Authority
CN
China
Prior art keywords
sensor
monitoring
electric power
monitoring sensor
power cabinet
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
CN201921749824.3U
Other languages
Chinese (zh)
Inventor
Xi Liang
梁希
Huijun Ma
马会钧
Jianyang Xue
薛建阳
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Wuxi Huier Technology Co ltd
Original Assignee
Wuxi Huier Technology Co ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Wuxi Huier Technology Co ltd filed Critical Wuxi Huier Technology Co ltd
Priority to CN201921749824.3U priority Critical patent/CN210244552U/en
Application granted granted Critical
Publication of CN210244552U publication Critical patent/CN210244552U/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Landscapes

  • Alarm Systems (AREA)
  • Fire Alarms (AREA)

Abstract

The utility model belongs to the technical field of power equipment, especially, be a wireless monitoring fire control unit of electric power cabinet, including dust concentration monitoring sensor, multiple spot leak protection monitoring sensor, smoke sensor signal monitor, electric leakage monitoring sensor, multiple spot temperature monitoring sensor, humidity transducer, door magnetism monitoring sensor, control processing unit, wireless data transmission module, cell-phone terminal, alarm module, fire control actuating mechanism, RS485 interface and LCD display element. The utility model discloses an add dust concentration monitoring sensor and multiple spot leak protection monitoring sensor, can carry out real-time supervision to dust concentration and water leakage state in the electric power cabinet, simultaneously through door magnetism monitoring sensor's setting, can monitor whether the electric power cabinet suffers illegal opening, send the SMS through wireless data transmission module to the administrator and report to the police, effectively avoid taking place the power equipment phenomenon of stealing, make the monitoring more comprehensive, application scope is wider, safety protection performance is more excellent.

Description

Wireless monitoring fire-fighting device for electric power cabinet
Technical Field
The utility model relates to a power equipment technical field specifically is a wireless monitoring fire control unit of electric power cabinet.
Background
The force cabinet is one of the key devices of the power system, and the operation safety state of the force cabinet has a great influence on the reliability of the power system. The current electric power cabinet mainly has following shortcoming in the aspect of fire control monitoring: (1) the fire-fighting monitoring device of the existing electric power cabinet generally detects the environmental temperature only through a temperature sensor arranged in the electric power cabinet, the sensitivity of a similar detection device is low, an alarm prompt can be sent only when the circuit has a fault and the temperature is obviously overhigh, and when the temperature is overhigh, the prompt is carried out, so that effective measures cannot be taken to carry out fire-fighting remediation, and irreparable loss can be caused; (2) the traditional electric power cabinet has the circuit aging and leakage phenomena after long-time use, and if the traditional electric power cabinet cannot detect in time and take power-off measures, the safety of electric power workers and the surrounding environment can be influenced; (3) because installation and electric power cabinet structure reason, current product can not the accurate temperature of monitoring electric power cabinet position of generating heat. Failure points can not be found in time, failure report is missed, and quality accidents are caused.
In order to solve the technical problems, Chinese patent CN201420057445.9 discloses a wireless monitoring fire-fighting device for an electric power cabinet, which comprises an MCU singlechip, a smoke sensing signal monitor, a leakage current monitoring sensor, a multi-point temperature monitoring sensor, a wireless signal receiver, an infrared signal sensor, an output controller, a power switch controller, a fire-fighting execution mechanism, a local voice alarm, a remote open-circuit alarm, an electric power cabinet security control mechanism, an LCD display output unit, a human body sensing input unit and an RS485 network communication unit; the smoke sensing signal monitor, the leakage current monitoring sensor and the multipoint temperature monitoring sensor are respectively connected with the wireless signal receiver through a wireless network; the output controller is respectively connected with the power switch controller, the fire-fighting execution mechanism, the local voice alarm, the remote open-circuit alarm and the electric power cabinet security control mechanism; the MCU singlechip is respectively connected with the wireless signal receiver, the infrared signal sensor, the output controller, the LCD display output unit, the human body induction input unit and the RS485 network communication unit; this fire control unit is monitored to electric power cabinet wireless monitoring electric power cabinet signal monitor, leakage current monitoring sensor, multiple spot temperature monitoring sensor, infrared signal sensor constitute electric power cabinet monitoring module. The system structure adopts the multipoint temperature monitoring sensor to monitor the contact of the circuit, has high monitoring sensitivity, and avoids the human body from contacting a high-voltage electrified part through wireless signal transmission, thereby avoiding potential safety hazards; an infrared signal sensor is adopted at dead angle or bend angle positions of circuit installation, so that omnibearing monitoring is realized; the leakage current state of the electric power cabinet is monitored through a leakage current monitoring sensor, and the electric power cabinet access door is locked through an electric power cabinet security control mechanism, so that live-line operation is prevented, and personal safety is protected; the smoke sensing signal monitor is started to detect the fire-fighting state of the electric power cabinet, and the fire-fighting protection is carried out on the electric power cabinet through the fire-fighting executing mechanism. Above-mentioned wireless monitoring fire control unit of electric power cabinet plays the monitoring effect to electric power cabinet fire control state to a certain extent, reach certain security protection effect, still there is the use limitation, because the factor that influences the operation of electric power cabinet safety and stability is not only for humiture in the cabinet, electric leakage state and conflagration state, it still includes interior dust concentration of cabinet, water leakage state and theftproof safety degree etc. above-mentioned wireless monitoring fire control unit of electric power cabinet lacks the monitoring to dust concentration and water leakage state, safety protection is lower, the easy power equipment phenomenon of stealing that takes place.
SUMMERY OF THE UTILITY MODEL
Technical problem to be solved
Not enough to prior art, the utility model provides an electric power cabinet wireless monitoring fire control unit has solved current electric power cabinet wireless monitoring fire control unit and has had the use limitation, lacks the monitoring to dust concentration and water leakage state, and safety protection is lower, easily takes place the problem of power equipment theft phenomenon.
(II) technical scheme
In order to achieve the above object, the utility model provides a following technical scheme: a wireless monitoring fire-fighting device for an electric power cabinet comprises a dust concentration monitoring sensor, a multi-point leakage-proof monitoring sensor, a smoke sensing signal monitor, an electric leakage monitoring sensor, a multi-point temperature monitoring sensor, a humidity sensor, a door magnetic monitoring sensor, a control processing unit, a wireless data transmission module, a mobile phone terminal, an alarm module, a fire-fighting execution mechanism, an RS485 interface and an LCD display unit, wherein the control processing unit is respectively and electrically connected with the dust concentration monitoring sensor, the multi-point leakage-proof monitoring sensor, the smoke sensing signal monitor, the electric leakage monitoring sensor, the multi-point temperature monitoring sensor, the humidity sensor, the door magnetic monitoring sensor, the alarm module, the fire-fighting executing mechanism, the RS485 interface and the LCD display unit, the control processing unit is in remote communication with the mobile phone terminal through the wireless data transmission module, and the fire-fighting execution mechanism is used for carrying out fire-fighting protection on the electric power cabinet.
As an optimized technical scheme of the utility model, dust concentration monitoring sensor adopts GCG1000 type dust concentration sensor.
As an optimized technical proposal of the utility model, the multi-point leakage-proof monitoring sensor adopts a HW-58 water leakage sensor.
As an optimized technical scheme of the utility model, smoke signal monitor adopts JTY-GD-SA1201 type photoelectric smoke fire detector.
As an optimal technical scheme of the utility model, electric leakage monitoring sensor adopts one in LEM leakage current sensor CTSR series.
As an optimized technical scheme of the utility model, the multiple spot temperature monitoring sensor adopts DS18B20 temperature sensor.
As an optimized technical scheme of the utility model, humidity transducer adopts HR14 resistance type polymer sensor.
As an optimized technical scheme of the utility model, door magnetism monitoring sensor adopts CS-T2-A wireless sensor.
As an optimized technical scheme of the utility model, control processing unit adopts MC9S12DG128 singlechip.
(III) advantageous effects
Compared with the prior art, the utility model provides an electric power cabinet wireless monitoring fire control unit possesses following beneficial effect:
this wireless monitoring fire control unit of electric power cabinet, humiture in possessing the electric power cabinet, the electric leakage state, in the prior art characteristic of the wireless remote monitoring of conflagration state and electric leakage state, through addding dust concentration monitoring sensor and multiple spot leak protection monitoring sensor, can carry out real-time supervision to dust concentration and water leakage state in the electric power cabinet, set up through door magnetism monitoring sensor simultaneously, can monitor whether the electric power cabinet suffers illegal opening, send the SMS warning to the administrator through wireless data transmission module, effectively avoid taking place power equipment theft phenomenon, make the monitoring more comprehensive, application scope is wider, safety protection performance is more excellent.
Drawings
Fig. 1 is a schematic diagram of the system of the present invention.
In the figure: 1. a dust concentration monitoring sensor; 2. a multi-point leak-proof monitoring sensor; 3. a smoke signal monitor; 4. an electric leakage monitoring sensor; 5. a multipoint temperature monitoring sensor; 6. a humidity sensor; 7. a door magnetism monitoring sensor; 8. a control processing unit; 9. a wireless data transmission module; 10. a mobile phone terminal; 11. an alarm module; 12. a fire-fighting actuator; 13. an RS485 interface; 14. an LCD display unit.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
Examples
Referring to fig. 1, the present invention provides the following technical solutions: a wireless monitoring fire-fighting device of an electric power cabinet comprises a dust concentration monitoring sensor 1, a multi-point leakage-proof monitoring sensor 2, a smoke sensing signal monitor 3, an electric leakage monitoring sensor 4, a multi-point temperature monitoring sensor 5, a humidity sensor 6, a door magnetic monitoring sensor 7, a control processing unit 8, a wireless data transmission module 9, a mobile phone terminal 10, an alarm module 11, a fire-fighting execution mechanism 12, an RS485 interface 13 and an LCD display unit 14, wherein the control processing unit 8 is respectively electrically connected with the dust concentration monitoring sensor 1, the multi-point leakage-proof monitoring sensor 2, the smoke sensing signal monitor 3, the electric leakage monitoring sensor 4, the multi-point temperature monitoring sensor 5, the humidity sensor 6, the door magnetic monitoring sensor 7, the alarm module 11, the fire-fighting execution mechanism 12, the RS485 interface 13 and the LCD display unit 14, the control processing unit 8 is in remote communication with the mobile phone terminal 10 through the wireless data transmission, the fire-fighting executing mechanism 12 is used for fire-fighting protection of the electric power cabinet.
In the embodiment, the wireless data transmission module 9 adopts one of a GPRS wireless data transmission module, a GSM short message module and an RF wireless data transmission module, and adopts a short message transmission mode, so that an administrator can conveniently and accurately grasp the fire protection state of the electric power cabinet, and can give an alarm in time when the electric power cabinet is illegally opened, thereby reducing the loss of electric power equipment; the alarm module 11 can adopt a Hangzhou inferior YS-800 multifunctional alarm, and the Hangzhou inferior YS-800 multifunctional alarm has the following advantages: the alarm host is not provided with any button, and the function is selected through the infrared remote controller to adjust the volume; the tone is convenient and safe to operate, the climbing is not needed for changing, the situation that irrelevant personnel change the setting at will is avoided, the IP65 protection grade is adopted, dust can be effectively prevented from entering, and the dustproof effect is good; in the utility model, the multi-point leakage-proof monitoring sensors 2 can be arranged around the top of the electric power cabinet, around the inner wall of the cabinet door of the electric power cabinet and at the bottom of the inner cavity of the electric power cabinet, and can monitor whether water leaks in the electric power cabinet in real time; the utility model discloses still include FLASH storage module, feel signal monitor 3, electric leakage monitoring sensor 4, multiple spot temperature monitoring sensor 5 and the data that humidity transducer 6 gathered by dust concentration monitoring sensor 1, multiple spot leak protection monitoring sensor 2, cigarette and show through LCD display element 14 to store through FLASH storage module.
Specifically, the dust concentration monitoring sensor 1 is a GCG1000 type dust concentration sensor.
In this embodiment, the GCG1000 type dust concentration sensor can directly read the mass concentration of dust particles in the air. The sensor absorbs and digests the advanced dust measurement technology at home and abroad according to the ExibI grade explosion-proof design in MT163-1997 universal technical conditions of direct-reading dust concentration measuring instruments, Q/320581ESD001-2008 GCG1000 type dust concentration sensor enterprise standard and GB3836.4-2000 standard, detects dust by using the light refraction principle, and calculates the detection data by a microprocessor to directly display the dust mass concentration and convert the data into data signals for output for a mine monitoring system or other measurement and control systems. The sensor consists of a sampling head, a detection device, a single chip microcomputer system and an air pumping system, and has the characteristics of convenience in carrying, rapidness and accuracy in measurement, high detection sensitivity, stable performance, simplicity in maintenance and the like. Due to the adoption of new technologies such as a laser technology, a high-reliability air pumping system and the like, the sensor has better quality and technical superiority; the main application and the application range are as follows: the device is suitable for continuously monitoring the total dust concentration in the atmosphere on site in coal mines and other operation environments with explosion risks; the dust pollution condition in the dust operation place can be accurately and timely reflected.
Specifically, the multi-point leakage-proof monitoring sensor 2 adopts an HW-58 water leakage sensor.
In this embodiment, the HW-58 water leakage sensor is also called HW-58 water sensor, and is characterized in that: the method is suitable for detecting water immersion of important places such as machine room base stations, warehouses and the like; a brand new patent design is adopted, and the BTR-1018 water immersion detection line is matched for use; the isolation is good: the input, the output and the power supply are completely isolated, and the safety and the reliability are realized; the range is optional: the detected range can be divided into four ranges and is selected by a knob switch; the technology is advanced: a multifunctional detection mode is adopted, the probe does not have the phenomenon of corrosion, and the full-thread detection is realized; safe and reliable: and automatically detecting the on-off fault of the line.
Specifically, the smoke sensing signal monitor 3 adopts a JTY-GD-SA1201 type photoelectric smoke fire detector.
In the embodiment, the JTY-GD-SA1201 type independent photoelectric smoke fire detector adopts a photoelectric sensor with a special structural design, is produced by a patch processing technology, and has the characteristics of high sensitivity, stability, reliability, low power consumption, attractiveness, durability, convenience in use and the like. The circuit and the power supply can be self-checked, and analog alarm test can be carried out.
Specifically, the leakage current monitoring sensor 4 is one of a LEM leakage current sensor CTSR series.
In this embodiment, the CTSR series is a sensor for leakage current detection that is released by LEM in 2011, and the series of sensors can realize detection of leakage currents of 300ma, 600ma, and 1A based on the Fluxgate principle, and can be applied to industries requiring leakage current detection, such as photovoltaic and electric power industries. The leakage state of the electric power cabinet is detected through the leakage monitoring sensor 4, and the leakage current value is calculated through the output of the sensor.
Specifically, the multipoint temperature monitoring sensor 5 adopts a DS18B20 temperature sensor.
In this embodiment, the DS18B20 is a commonly used digital temperature sensor, outputs a digital signal, and has the characteristics of small volume, low hardware overhead, strong anti-interference capability, and high accuracy.
Specifically, the humidity sensor 6 is an HR14 resistance-type polymer sensor.
In the embodiment, the HR14 resistive polymer sensor is called a polymer humidity-sensitive resistance sensor, is specially developed for the application in industrial occasions such as humidifying equipment and dehumidifying equipment, and is verified by strict high-temperature high-humidity cycle test; the sensor has the characteristics of high response speed, high sensitivity, high precision, wide humidity sensing range, small humidity stagnation, small hysteresis, small power consumption, small volume, good repeatability, stable, high and reliable performance, good consistency and the like. Meets ROHS standard, passes SGS detection authentication and halogen-free detection verification.
Specifically, the door magnetic monitoring sensor 7 adopts a CS-T2-A wireless sensor.
In this embodiment, the utility model discloses a CS-T2-A wireless door magnetic sensor, cooperation warning box A1C use, during the use, when the cabinet door of electric power cabinet was illegally opened, warning box A1C took place the police dispatch newspaper, and simultaneously, after control processing unit 8 received CS-T2-A wireless door magnetic sensor's the signal of telecommunication, sent the SMS warning to the administrator through wireless data transmission module 9, reminded administrator electric power cabinet door and illegally opened.
Specifically, the control processing unit 8 adopts an MC9S12DG128 single chip microcomputer.
In this embodiment, the MC9S12DG128 single chip microcomputer is a 16-bit microcontroller with a 16-bit cpu as a core, a 128K byte flasheprom memory, an 8K byte RAM, a 2K byte EEPROM, two asynchronous Serial Communication Interfaces (SCI), two Serial Peripheral Interfaces (SPI), two 8-channel analog-to-digital converters (ADC), 1 8-channel pulse width modulation module, two controller compatible with the can2.0a/B protocol, 1 bytebright module, and an internal integrated circuit bus.
The utility model discloses a theory of operation and use flow: when in use, the dust concentration monitoring sensor 1, the multi-point leakage-proof monitoring sensor 2, the smoke sensing signal monitor 3, the electric leakage monitoring sensor 4, the multi-point temperature monitoring sensor 5, the humidity sensor 6 and the door magnetic monitoring sensor 7 are respectively used for monitoring the dust concentration, the water leakage state, the fire state and the electric leakage state in the electric power cabinet, simultaneously carrying out multi-point temperature detection on circuits in the cabinet, detecting the humidity in the cabinet and monitoring whether the electric power cabinet is illegally opened, the data collected by the dust concentration monitoring sensor 1, the multi-point leakage-proof monitoring sensor 2, the smoke sensing signal monitor 3, the electric leakage monitoring sensor 4, the multi-point temperature monitoring sensor 5 and the humidity sensor 6 are displayed by the LCD display unit 14, and the detected data are sent to a manager by the wireless data transmission module 9, so that the manager can remotely know and monitor the fire-fighting state of the electric power cabinet, when detecting that electric power cabinet fire control state is unusual, through the work of control processing unit 8 control fire control actuating mechanism 12, carry out fire protection to the electric power cabinet, when detecting the illegal opening of cabinet door of electric power cabinet, alarm module 11 sends the police dispatch newspaper, and send the SMS warning to the administrator through wireless data transmission module 9, remind administrator's electric power cabinet door illegally to open, play the effect of timely warning, effectively reduce power equipment's loss, RS485 interface 13 can constitute communication network with the RS485 bus, be used for transmission data.
Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments described in the foregoing embodiments, or equivalents may be substituted for elements thereof. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (9)

1. The utility model provides an electric power cabinet wireless monitoring fire control unit which characterized in that: the monitoring device comprises a dust concentration monitoring sensor (1), a multi-point leakage-proof monitoring sensor (2), a smoke sensing signal monitor (3), an electric leakage monitoring sensor (4), a multi-point temperature monitoring sensor (5), a humidity sensor (6), a door sensor monitoring sensor (7), a control processing unit (8), a wireless data transmission module (9), a mobile phone terminal (10), an alarm module (11), a fire control execution mechanism (12), an RS485 interface (13) and an LCD display unit (14), wherein the control processing unit (8) is respectively connected with the dust concentration monitoring sensor (1), the multi-point leakage-proof monitoring sensor (2), the smoke sensing signal monitor (3), the electric leakage monitoring sensor (4), the multi-point temperature monitoring sensor (5), the humidity sensor (6), the door sensor monitoring sensor (7), the alarm module (11), the fire control execution mechanism (12), RS485 interface (13) and LCD display element (14) electric connection, control processing unit (8) are through wireless data transmission module (9) and cell-phone terminal (10) remote communication, fire control actuating mechanism (12) are used for carrying out fire control protection to the electric power cabinet.
2. The wireless monitoring fire-fighting device of the electric power cabinet according to claim 1, characterized in that: the dust concentration monitoring sensor (1) adopts a GCG1000 type dust concentration sensor.
3. The wireless monitoring fire-fighting device of the electric power cabinet according to claim 1, characterized in that: the multi-point leakage-proof monitoring sensor (2) adopts a HW-58 water leakage sensor.
4. The wireless monitoring fire-fighting device of the electric power cabinet according to claim 1, characterized in that: the smoke sensing signal monitor (3) adopts a JTY-GD-SA1201 type photoelectric smoke fire detector.
5. The wireless monitoring fire-fighting device of the electric power cabinet according to claim 1, characterized in that: the leakage monitoring sensor (4) adopts one of a LEM leakage current sensor CTSR series.
6. The wireless monitoring fire-fighting device of the electric power cabinet according to claim 1, characterized in that: the multi-point temperature monitoring sensor (5) adopts a DS18B20 temperature sensor.
7. The wireless monitoring fire-fighting device of the electric power cabinet according to claim 1, characterized in that: the humidity sensor (6) adopts an HR14 resistance type polymer sensor.
8. The wireless monitoring fire-fighting device of the electric power cabinet according to claim 1, characterized in that: the door magnetic monitoring sensor (7) adopts a CS-T2-A wireless door magnetic sensor.
9. The wireless monitoring fire-fighting device of the electric power cabinet according to claim 1, characterized in that: the control processing unit (8) adopts an MC9S12DG128 singlechip.
CN201921749824.3U 2019-10-17 2019-10-17 Wireless monitoring fire-fighting device for electric power cabinet Active CN210244552U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201921749824.3U CN210244552U (en) 2019-10-17 2019-10-17 Wireless monitoring fire-fighting device for electric power cabinet

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201921749824.3U CN210244552U (en) 2019-10-17 2019-10-17 Wireless monitoring fire-fighting device for electric power cabinet

Publications (1)

Publication Number Publication Date
CN210244552U true CN210244552U (en) 2020-04-03

Family

ID=69965787

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201921749824.3U Active CN210244552U (en) 2019-10-17 2019-10-17 Wireless monitoring fire-fighting device for electric power cabinet

Country Status (1)

Country Link
CN (1) CN210244552U (en)

Similar Documents

Publication Publication Date Title
CN207074246U (en) A kind of GIS partial discharge on-line monitoring system
CN201413196Y (en) Wireless aerial power cable contact temperature monitoring system
CN202994987U (en) Insulating property on-line monitoring device of sulfur hexafluoride gas insulated switch
CN108415338A (en) A kind of students' dormitory safety monitoring system and method
CN203643533U (en) Microcomputer type relay protection tester
CN108362932A (en) Electric energy meter battery undervoltage detection device
CN204423091U (en) A kind of workover platform remote environment supervisory system
CN205177103U (en) SF6 gas leakage recognition device
CN208172972U (en) A kind of smart home system based on zigbee
CN204346980U (en) A kind of detector for SF6 gas concentration on-line monitoring
CN210244552U (en) Wireless monitoring fire-fighting device for electric power cabinet
CN204514362U (en) A kind of housing quality detection system
CN208622225U (en) A kind of dim light charging type intelligent smoke detector system
CN206583893U (en) A kind of Portable combustible gas detector
CN102682567A (en) Fireproof and antitheft system of transformer substation
CN205810059U (en) A kind of based on Internet of Things household monitoring system
CN105608843A (en) Combustible gas alarm control system
CN107862838A (en) A kind of intelligent terminal cabinet cabinet door folding condition warning device
CN209168346U (en) A kind of Multifunction safety siren and its alarm system
CN212274982U (en) Intelligent environment monitoring system based on Internet of things
CN201191439Y (en) Domestic multifunctional monitoring alarm
CN204988349U (en) Large -scale public building thing environment monitoring device
CN204269633U (en) Suspension type multi-parameter measuring device
CN210893419U (en) Electrical fire monitoring detector with infrared temperature measurement
CN203386330U (en) Portable SF6 device gas leakage and abnormal voice recognition and alarm device

Legal Events

Date Code Title Description
GR01 Patent grant
GR01 Patent grant