CN112097837A - Cable trench environment state monitoring method - Google Patents
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Abstract
The invention belongs to the technical field of electric power. A cable trench environment state monitoring method is characterized by comprising the following steps: 1) preparing a cable trench environment state monitoring system which comprises a remote monitoring platform, a concentrator and a wireless water immersion and temperature and smoke sensing monitoring device; a plurality of wireless water immersion and temperature and smoke sensing monitoring devices are arranged on the same cable trench, all the wireless water immersion and temperature and smoke sensing monitoring devices on the same cable trench are in wireless communication connection with a concentrator, and all the concentrators are in wireless communication connection with a remote monitoring platform; the wireless water immersion and temperature sensing smoke monitoring device comprises a water immersion sensor, a smoke sensor, a temperature and humidity sensor, a controller, a wireless communication module and a power supply module; 2) the sensor monitors the environmental state of the cable trench in real time, and once an abnormal phenomenon is monitored, an alarm signal is generated and sent to the remote monitoring platform, and the remote monitoring platform actively pushes alarm information to each monitoring maintenance personnel in real time. The method improves the reliability and safety of power transmission.
Description
Technical Field
The invention belongs to the technical field of electric power, and particularly relates to a method for monitoring an environmental state of a cable trench.
Background
The cable is an important carrier of electric energy transmission and information transmission, and general cable is mainly laid in the cable pit, then lay the apron on the cable pit and carry out the cable protection, and the cable pit apron that present most use mainly is concrete cover plate and steel cover plate, and the control of the cable in the cable pit in operation is realized through the daily tour of attendant, and the control means is single, and can't directly observe, to the difficult timely discovery of the hidden danger of cable conflagration or operation in-process. This makes it more difficult to control quickly and often involves other loops in the event of a fire in the raceway cable. Cable fires can cause serious consequences such as equipment tripping, load shedding, even injury to fire fighters, and the like, in addition to cable damage. The water entering the cable trench can cause serious accidents, the water of the cable trench is basically sewage flowing down in rain and the like, and the sewage is corrosive. Can be corrosive to the cable. The cable is not damaged in a short time and is damaged for a long time. In addition, the quality and construction of the cable itself need to be considered. In case the cable oversheath is damaged a bit, aqueous vapor can get into in the cable, can lead to water tree type creeping certainly. The conductive quality is affected, the breakdown is caused for a long time, and the cable joint is more dangerous.
At present, the coverage rate of a power grid cable in a city is higher and higher, and the mileage of a cable trench is obviously increased, so that the fault rate of the cable trench becomes a key factor in ensuring the power supply reliability of a power grid. Although the operation design of the power grid has been developed for a long time with the development speed of the society in recent years, when a large power grid disruption accident occurs, the accident cannot be effectively avoided according to the level of research on the power grid at present. The occurrence of large power grid accidents in the world may bring about disasters, affect the normal life of people and also have great negative impact on the society. In addition, the requirements of people on the quality of life are higher and higher, so the power supply reliability of a power grid is also the premise of guaranteeing the quality of life, and the aspect of primary consideration in the design, planning and operation of a power system is the reliability of the operation of the system. However, since the power cable trench is laid underground, it is difficult to visually recognize problems occurring in the power cable during the inspection process.
Therefore, more effective modes are needed to be found to improve the monitoring quality of the cable trench state and improve the monitoring level, and the modes have the characteristics of prediction, prevention and early warning in the electrical monitoring process.
Disclosure of Invention
The invention aims to provide a method for monitoring the environmental state of a cable trench, which can monitor the temperature, smoke and water level in the cable trench and improve the reliability and safety of power transmission.
In order to achieve the purpose, the technical scheme adopted by the invention is as follows: a cable trench environment state monitoring method is characterized by comprising the following steps:
1) preparing a cable trench environmental state monitoring system, wherein the cable trench environmental state monitoring system comprises a remote monitoring platform, a concentrator and a wireless water immersion and temperature and smoke sensing monitoring device; a plurality of wireless water immersion and temperature and smoke sensing monitoring devices are arranged on the same cable trench, all the wireless water immersion and temperature and smoke sensing monitoring devices on the same cable trench are in wireless communication connection with a concentrator, and all the concentrators are in wireless communication connection with a remote monitoring platform;
the wireless water immersion and temperature sensing smoke monitoring device comprises a water immersion sensor, a smoke sensor, a temperature and humidity sensor, a controller, a wireless communication module and a power supply module; the power module respectively provides power for the controller and the wireless communication module, the water sensor, the smoke sensor and the temperature and humidity sensor are respectively connected with the signal input end of the controller, the signal output end of the controller is connected with the wireless communication module, and the wireless communication module is in wireless communication connection with the concentrator; the water immersion sensor, the smoke sensor and the temperature and humidity sensor are respectively arranged on the lower surface of the cable trench cover plate, the controller, the wireless communication module and the power supply module are respectively arranged on the upper surface of the cable trench cover plate, and the cable trench cover plate covers the cable trench;
2) the system comprises a water sensor, a smoke sensor and a temperature and humidity sensor, wherein the water sensor, the smoke sensor and the temperature and humidity sensor are used for monitoring the environmental state of a cable trench in real time, the relative temperature, the smoke degree and the water level value which need to be controlled by the cable trench are set, the collected data are analyzed through an algorithm, when a detected value is detected to exceed a set value, an alarm signal is sent to a concentrator through a wireless communication module to send the monitored data and the working parameters of the alarm signal to the concentrator, the concentrator is sent to a remote monitoring platform at the rear end, and the remote monitoring platform actively pushes alarm information to each monitoring maintainer.
The controller is connected with an alarm module.
The wireless water immersion and temperature sensing smoke monitoring device further comprises a harmful gas detection sensor, the harmful gas detection sensor comprises a methane sensor and a carbon monoxide sensor, the harmful gas detection sensor is mounted on the lower surface of the cable trench cover plate, and the harmful gas detection sensor is connected with a signal input end of the controller.
The smoke sensor and the temperature and humidity sensor are smoke and temperature sensing composite sensors.
The invention has the beneficial effects that: the method can monitor the temperature, smoke and water level in the cable trench. The monitoring level of the cable trench can be improved, the power transmission reliability and the safety of the power cable can be guaranteed, potential dangers in the trench can be monitored, timely treatment can be carried out when an alarm condition occurs, and economic loss caused by the safety of the cable is reduced as far as possible. The safe and stable operation of the cable is guaranteed, the power supply reliability is improved, and certain economic benefits and social benefits are brought.
Drawings
Fig. 1 is a schematic structural diagram of a cable trench environmental state monitoring system according to the present invention.
Fig. 2 is a schematic block diagram of a wireless water immersion and temperature and smoke sensing monitoring device in the cable trench environment state monitoring system of the invention.
Fig. 3 is a schematic structural diagram of a wireless water immersion and temperature and smoke sensing monitoring device in the cable trench environment state monitoring system of the invention.
Fig. 4 is a schematic diagram of communication networking of the system of the present invention.
FIG. 5 is a software flow diagram.
Fig. 6 is an initialization flow block diagram.
Fig. 7 is a block diagram of a process for setting an address.
Fig. 8 is a block diagram of a temperature and humidity measurement process.
Fig. 9 is a communication flow diagram.
FIG. 10 is a flow chart for entering a low power mode.
In the figure: the system comprises a cable trench intelligent cover plate, a communication network 2, a remote monitoring platform 3, a cable trench cover plate 4, a smoke and temperature sensing composite sensor 5, a water immersion sensor 6, a wireless water immersion and temperature sensing smoke monitoring device 7, a controller 8 and a concentrator 9.
Detailed Description
For a better understanding of the present invention, the technical solutions of the present invention will be further described below with reference to the following examples and accompanying drawings.
As shown in fig. 1 to 4, a method for monitoring environmental conditions of a cable trench includes the following steps:
1) prepare cable pit environmental condition monitoring system, cable pit environmental condition monitoring system includes remote monitoring platform (host computer, server, main website or cloud platform) 3, concentrator 9, wireless water logging and temperature sensing smoke monitoring devices (or refer to: wireless water immersion sensor) 7; a plurality of (2-10000) wireless water logging and temperature sensing smoke monitoring devices 7 are arranged on the same cable trench, wherein a plurality of cable trench cover plates (2-10000 cable trench cover plates) are arranged on one cable trench, all the wireless water logging and temperature sensing smoke monitoring devices 7 on the same cable trench are in wireless communication connection with one concentrator 9, and all the concentrators 9 are in wireless communication connection with the remote monitoring platform 3 (a plurality of concentrators 9 corresponding to a plurality of cable trenches);
the wireless water immersion and temperature sensing smoke monitoring device 7 comprises a water immersion sensor 6, a smoke sensor, a temperature and humidity sensor, a controller 8, a wireless communication module and a power supply module; the power supply module respectively provides power for the controller 8 and the wireless communication module (the power supply module is respectively connected with power supply ports of the controller 8 and the wireless communication module), the water sensor 6, the smoke sensor and the temperature and humidity sensor are respectively connected with a signal input end of the controller 8, a signal output end of the controller 8 is connected with the wireless communication module, and the wireless communication module is in wireless communication connection with the concentrator 9; the water immersion sensor 6, the smoke sensor and the temperature and humidity sensor are respectively arranged on the lower surface of the cable trench cover plate, the controller 8, the wireless communication module and the power supply module are respectively arranged on the upper surface of the cable trench cover plate, and the cable trench cover plate covers the cable trench;
2) the system comprises a water sensor 6, a smoke sensor and a temperature and humidity sensor, wherein the environment state of the cable trench is monitored in real time, the relative temperature, the smoke degree and the water level value which need to be controlled of the cable trench are set, collected data are analyzed through an algorithm, when a detected value is detected to exceed a set value, an alarm signal is sent to a concentrator through a wireless communication module to send monitoring data and self working parameters, the concentrator sends to a remote monitoring platform at the rear end, and the remote monitoring platform (a host, a server, a master station or a cloud platform) actively pushes the alarm information to each monitoring maintenance person in real time.
Early warning is realized by detecting the water level, temperature difference abnormity and smoke concentration in the cable trench, and the accident is eliminated when early warning is ensured to be performed once abnormity occurs. The cable trench environment state real-time monitoring system can monitor the environment state of the cable trench in real time, monitor the environment information such as water level, temperature and smoke in the cable trench in real time, ensure that once abnormal early warning exists, reduce the safety risk of unpredictability, eliminate the accident in the situation of not burning, and improve the safety of cable operation.
The cable trench intelligent cover plate 1 comprises a cable trench cover plate and a wireless water immersion and temperature and smoke sensing monitoring device (or called as a wireless water immersion sensor) 7; the wireless water immersion and temperature-sensing smoke-sensing monitoring device is described above.
The controller 8 is connected with an alarm module (alarm).
The wireless water immersion and temperature sensing smoke monitoring device 7 further comprises a harmful gas detection sensor, the harmful gas detection sensor comprises a methane sensor and a carbon monoxide sensor, the harmful gas detection sensor is installed on the lower surface of the cable trench cover plate, and the harmful gas detection sensor is connected with a signal input end of the controller 8.
The power supply module comprises a 3.6V main battery and a 3.6V large-capacity auxiliary battery.
The smoke sensor and the temperature and humidity sensor can be a smoke and temperature sensing composite sensor 5; the smoke and temperature sensing composite sensor can adopt a composite smoke and temperature sensing detector (Taihe-an TX3120) or a JTF-GOM-GST9613 point type composite smoke and temperature sensing fire detector.
The functions of the water sensor and the smoke-sensing and temperature-sensing compound sensor are to collect state information in the cable trench and upload data information.
The controller 8 adopts a Cortex-M3 processor STM32 series single chip microcomputer of ST company, the wireless communication module adopts E32-TTL-100 designed and produced by hundred million company, and target communication addresses of each wireless water immersion and temperature-sensing smoke monitoring device (or wireless water immersion sensor) 7 can be independently set. The wireless monitoring system is used for monitoring the air humidity, the temperature and the water immersion condition of an underground pipeline, networking is realized through a wireless collector, and data are uploaded to a remote monitoring platform (a host, a server, a master station or a cloud platform).
A communication network system: the network system can be composed of two parts of a monitoring sub-network and a remote communication network; the composition of the monitoring sub-network is classified according to the monitoring target, and is realized by grouping and networking of front lower computers (namely, a concentrator 9 and a collector/transmitter), and the collected cable trench state information is transmitted remotely through a remote communication network.
Remote monitoring platform: the remote monitoring platform can be deployed at a PC (personal computer) end and can be accessed through a mobile APP (application). The functions of remote access, control and configuration of the intelligent cover plate of the cable trench can be realized.
The environmental state identification of the cable trench is realized by additionally arranging a sensor, and the monitoring sensor of the environmental state of the cable trench mainly comprises a water sensor, a smoke sensor, a temperature and humidity sensor and the like. The sensor is packaged by an IP68 waterproof shell, and is suitable for underground pipeline water immersion detection and temperature and humidity measurement. The operation of uploading data from the scattered measuring terminals to the data acquisition unit is realized through a wireless data transmission protocol, the complicated wiring step of the traditional sensor is omitted, and the real-time working environment of the user detection equipment is facilitated.
The wireless monitoring sensor for the environmental state of the cable trench is powered by a battery and used for measuring data such as temperature, humidity and water level of the environment. The functions of the wireless monitoring sensor for the environmental state of the cable trench comprise: 1) measuring temperature and humidity; 2) water immersion detection; 3) smoke detection; 4) wireless communication; 5) the address of the sensor can be set; 6) low power mode (standby); 7) other customized sensor access is supported. A functional block diagram is shown in fig. 2 below.
Each cable trench cover plate is provided with a wireless water immersion and temperature sensing smoke monitoring device, key information such as smoke, temperature, water level and the like of the corresponding position of a cable trench is collected, the relative temperature, the smoke degree and the water level value which need to be controlled of the cable trench are set, the collected data are analyzed through an algorithm, and when a detected value exceeds a set value, an alarm signal is sent to a field communication concentrator through a wireless communication module to send the monitored data and working parameters of the alarm signal to the field communication concentrator. As shown in fig. 4.
The cable trench monitoring sensing module and the field communication concentrator adopt a remote spread spectrum LORA technology. The remote spread spectrum LORA technology is a wireless data transmission network which is long in distance, low in complexity, low in power consumption, low in speed, low in cost and high in reliability. The remote spread spectrum LORA data transmission module is similar to a mobile network base station, and the communication distance supports infinite extension. Different from CDMA network or GSM network, the long-distance spread spectrum LORA network is mainly established for industrial field automation control data transmission, and has the advantages of simplicity, convenient use, reliable work and low price. The remote spread spectrum LORA node can be used as a monitoring object, for example, a sensor connected to the remote spread spectrum LORA node directly collects and monitors data, and can automatically transfer data (independent communication, transfer communication) transmitted from another network node. The remote spread spectrum LORA technology is widely applied to the M2M industry in the industry chain of the internet of things, such as smart grid, industrial automation, intelligent transportation, and the like.
The concentrator collects the state information of the sensors, the collected information is sent to a management platform at the rear end through a 5G network for monitoring and statistical analysis, and the monitoring management platform at the rear end pushes the alarm information to each monitoring maintenance personnel in real time.
The schematic diagram 4 of the system communication networking technical scheme is shown as follows.
The monitoring platform adopts a B/S architecture design, monitors the state of the cable trench, has the functions of remote control and statistical form, and additionally supports an APP access interface of the mobile phone. The monitoring state comprises current and historical temperature, water level, smoke degree, working state, fault record and the like. The state records can be used for producing a year, month and day report so as to provide a detailed understanding of the condition of the cable trench within a period of time and provide a reliable data base for later reconstruction. Managers can remotely control the intelligent cable duct cover plate to work through the background and can also remotely set working parameters of the intelligent cable duct cover plate.
APP removes the development of instrument, makes things convenient for managers to break through the restraint of time and space, through the smart mobile phone of wide application, knows environment and device operational aspect in the cable pit more conveniently. Consider the requirement to communication safety protection, the APP instrument adopts cross-platform design scheme, is convenient for install and operate on removing the palm machine to when supporting the manual work to patrol and examine, palm machine and cable pit intelligence apron monitoring devices's two-way data communication function.
The whole system has the characteristics of convenient installation and construction, and a large amount of manpower and material resources are saved.
1.1 wireless water logging and temperature sensing smoke monitoring devices (or called as wireless water logging sensors) 7, with STM32L151C8T6 as the main control MCU, use 3.6V main battery power supply, be responsible for humiture measurement and water logging detection. The wireless communication module (wireless data transmission module) is powered by a 3.6V large-capacity auxiliary battery and is responsible for wireless communication. MCU passes through I/O interface and serial ports connection peripheral module, includes: (1) a wireless communication module (wireless data transfer module) (USART); (2) a temperature and humidity sensor (I/O interface analog IIC); (3) water immersion sensor electrodes (I/O); in addition, a 7-wire JTAG interface is used for program download and debugging. The structure is shown in fig. 3 below.
1.2.1.1 core processor Module
A controller (core processor module) is supposed to adopt an ARMCortex-M3 processor core based on ultra-low power consumption of STM32L series products, and two unique energy-saving technologies of an ideogram semiconductor are adopted: the 130nm special low-leakage current manufacturing process and the optimized energy-saving framework provide leading energy-saving performance in the industry. Most pins, software and peripherals are shared by the full series of products, and the excellent compatibility brings the greatest design flexibility for developers. The STM32L family is widely used in wired and wireless devices due to its excellent power consumption, including medical and handheld devices, application control and user interfaces, beidou positioning and motion equipment, wired and wireless sensors, utility measurements, and the like.
1.2.1.2 wireless data transmission module
E32-TTL-100 is supposed to be adopted by a wireless communication module (wireless data transmission module), the wireless communication module is a wireless serial port module (UART) based on an SX1278 radio frequency chip of SEMTECH company, a transparent transmission mode is adopted, the wireless communication module works in a frequency band of 410-441 MHz (default 433MHz), a LoRa spread spectrum technology is adopted, TTL level output is adopted, and 3.3V and 5V IO port voltage are compatible.
1.2.1.3 digital temperature and humidity sensor
The digital temperature and humidity sensor is intended to be an SHT20 sensor, mainly comprising a capacitive humidity sensor, a band gap temperature sensor and a dedicated analog and digital integrated circuit, embedded in a reflowable dual-plane leadless (DFN) package. The calibrated linearized sensor signal is provided in a digital I2C format. The measurable humidity range is 0% -100%, and the precision is +/-3%; the measurable temperature range is-40 ℃ to 125 ℃, and the precision is 0.3 ℃. SHT20 is a DFN-6 package with dimensions of 3mm by 3mm and a pin pitch of 1 mm. The sensor can be made into a patch module, and 4 effective pins of the sensor are led out through the PCB, so that the welding difficulty is reduced.
1.2.1.4 Main Power interface
A 3.6V battery is to be used for power. And the HT7533 is used for converting the voltage into 3.3V and supplying power for the single chip microcomputer. BL9193-33BAPRN is supposed to be used, and is opened in a working state to supply power for electrodes of the water sensor and the temperature and humidity sensor, and is closed in a standby state.
1.2.1.5 communication power interface
A 3.6V battery is to be used for power. BL9193-33BAPRN is to be used to convert the voltage to 3.3V. And the wireless module is switched on in a working state to supply power to the wireless module, and is switched off in a standby state.
1.2.2 software flow
The STM32 adopts the running environment without an operating system, realizes software functions through the running mode of a foreground and a background (a main function and an interrupt function), and realizes the switching between different tasks by carrying out state transfer between the main function and the interrupt function and between application layer modules through a global zone bit.
The software flow comprises the following sub-flows: (1) initializing a flow; (2) setting an address flow; (3) temperature and humidity measurement process; (4) uploading a data flow; (5) and (5) standby flow. The software flow diagram is shown in fig. 5 below.
1.2.2.1 initialization procedure
The initialization process is responsible for initializing the MCU system, and comprises the following steps: (1) initializing a system by default; (2) initializing a system clock; (3) initializing a pin; (4) the RTC initializes, sets the RTC frequency and the wakeup count value. (5) Initializing a watchdog, and setting a watchdog clock frequency and a reloading value; the initialization flow diagram is shown in fig. 6.
1.2.2.2 flow of setting addresses
Entering the process of setting address, and firstly judging whether the awakening source is awakened by the key. And when the key is confirmed to be awakened, the wireless module sends an address setting request, and resends the request if the new address is not received. And storing the new address into the FLASH after receiving the new address, and sending a piece of confirmation information by using the new address as a receiver address. The address setting flow chart is shown in fig. 7.
1.2.2.2 flow of setting addresses
Entering the process of setting address, and firstly judging whether the awakening source is awakened by the key. And when the key is confirmed to be awakened, the wireless module sends an address setting request, and resends the request if the new address is not received. And storing the new address into the FLASH after receiving the new address, and sending a piece of confirmation information by using the new address as a receiver address. The address setting flow chart is shown in fig. 7.
1.2.2.3 measurement procedure
The temperature and humidity measurement process is responsible for reading the data of the temperature and humidity sensor and the water immersion state. And storing the continuous awakening times by using a backup register, and judging whether the sensor data needs to be read according to the continuous awakening times. When the wireless water immersion sensor works, the PVD detection is started, the PVD detection result is stored in a backup register, the backup register is read when the measurement process is executed every time, and whether the voltage of the main battery is too low or not is judged. During wireless transmission, the ADC is used for detecting the voltage of the communication battery, the result is stored in a backup register, the backup register can be read every time a measurement process is executed, and whether the voltage of the communication battery is too low during last transmission can be judged. The temperature and humidity measurement flow chart is shown in fig. 8.
1.2.2.4 communication flow
The uploading data flow is responsible for uploading temperature and humidity data. When the condition of uploading data is met, starting the wireless communication module to send the data, wherein the sufficient conditions of uploading data are as follows: (1) the current temperature exceeds 70 ℃; (2) the temperature change exceeds 1 ℃ within 1 minute; (3) within a set time range, the temperature change does not exceed 1 ℃; (4) uploading data for the last time meets the conditions (1) or (2), no response is received after the data are uploaded, the data are uploaded when the communication flow needs to be continuously executed for 10 times, and the continuous uploading is finished after the response is received; the communication flow diagram is shown in fig. 9.
1.2.2.5 Standby flow
And entering a standby mode, stopping the operation of the chip, enabling the RTC to still work, and keeping the backup register value all the time. The flow of entering the low power mode is shown in fig. 10.
The invention carries out real-time monitoring on the actual situation in the cable trench, and can monitor the following parameters:
(1) detecting the water level in the ditch, setting a warning water level by a monitoring system, analyzing the cable wiring layout in the ditch, and not starting a drainage system by a water pump when the water level is lower than the warning water level; when the water level is higher than the warning water level, the water pump automatically starts the drainage system to drain water. Therefore, the cable can be prevented from running under the condition of water immersion, the safety factor and the service life of the cable are improved, and the safe and reliable running of the power cable is further ensured.
(2) The detection of the heating faults of the cable, the internal thermal faults and the external thermal faults form two main faults of a cable body and a joint. The first category is internal thermal failure, which is characterized by failure points typically found in metal enclosures or insulating materials. Generally, the heat generation time is stable and long, and the generated heat can be transmitted between metal materials or insulating materials around the fault point, so that local temperature around the fault point is too high and even a fire disaster is generated. The other is external thermal failure, the poor welding condition in the exposed cable joint is the main reason of the external thermal failure of the cable joint, and as the temperature of the joint is likely to rise under the action of atmospheric reflux, the contact resistance is increased along with the increase of the temperature, and a great fire hazard is caused by the reciprocating circulation. The occurrence of the two conditions can cause fire disasters, so that the cable is damaged in a large area, the power grid equipment cannot operate safely, most of the cable is buried underground, the cable is difficult to maintain, the operation cannot be recovered in a short time, inconvenience is brought to life of people, and even huge economic loss is caused.
(3) For the detection of harmful gases in the cable trench, the ground surface level is higher than the plane of the cable trench, so that the cable trench is likely to flow into rainwater in rainy days. Along with the domestic garbage entering the cable duct and abundant mineral organic matters contained in the rainwater, microorganisms generated by the domestic garbage decompose and metabolize the organic matters, so that mixed gas (methane) of methane and carbon dioxide is formed. The biogas is inflammable, so that certain threat is brought to the safe operation of a high-voltage cable line, and even unpredictable ginseng damage is brought to personnel performing maintenance operation in a cable trench.
(4) For detecting the fire of the cable duct, the temperature monitoring in the cable duct is mainly carried out by using a temperature sensor, and when the temperature in the duct reaches a preset upper limit, a fire alarm gives out an alarm. Although the monitoring system can find out the fire scene, the fire cannot be avoided in time, and serious loss is caused to the cable trench.
Claims (4)
1. A cable trench environment state monitoring method is characterized by comprising the following steps:
1) preparing a cable trench environmental state monitoring system, wherein the cable trench environmental state monitoring system comprises a remote monitoring platform (3), a concentrator (9) and a wireless water immersion and temperature and smoke sensing monitoring device (7); a plurality of wireless water immersion and temperature and smoke sensing monitoring devices (7) are arranged on the same cable trench, all the wireless water immersion and temperature and smoke sensing monitoring devices (7) on the same cable trench are in wireless communication connection with one concentrator (9), and all the concentrators (9) are in wireless communication connection with a remote monitoring platform (3);
the wireless water immersion and temperature sensing smoke monitoring device (7) comprises a water immersion sensor (6), a smoke sensor, a temperature and humidity sensor, a controller (8), a wireless communication module and a power supply module; the power module respectively provides power for the controller (8) and the wireless communication module, the water sensor (6), the smoke sensor and the temperature and humidity sensor are respectively connected with the signal input end of the controller (8), the signal output end of the controller (8) is connected with the wireless communication module, and the wireless communication module is in wireless communication connection with the concentrator (9); the water immersion sensor (6), the smoke sensor and the temperature and humidity sensor are respectively arranged on the lower surface of the cable trench cover plate, the controller (8), the wireless communication module and the power supply module are respectively arranged on the upper surface of the cable trench cover plate, and the cable trench cover plate covers the cable trench;
2) the system comprises a water sensor, a smoke sensor and a temperature and humidity sensor, wherein the water sensor, the smoke sensor and the temperature and humidity sensor are used for monitoring the environmental state of a cable trench in real time, the relative temperature, the smoke degree and the water level value which need to be controlled by the cable trench are set, the collected data are analyzed through an algorithm, when a detected value is detected to exceed a set value, an alarm signal is sent to a concentrator through a wireless communication module to send the monitored data and the working parameters of the alarm signal to the concentrator, the concentrator is sent to a remote monitoring platform at the rear end, and the remote monitoring platform actively pushes alarm information to each monitoring maintainer.
2. The cable trench environment state monitoring method according to claim 1, wherein: the controller is connected with an alarm module.
3. The cable trench environment state monitoring method according to claim 1, wherein: the wireless water immersion and temperature sensing smoke monitoring device further comprises a harmful gas detection sensor, the harmful gas detection sensor comprises a methane sensor and a carbon monoxide sensor, the harmful gas detection sensor is mounted on the lower surface of the cable trench cover plate, and the harmful gas detection sensor is connected with a signal input end of the controller.
4. The cable trench environment state monitoring method according to claim 1, wherein: the smoke sensor and the temperature and humidity sensor are smoke and temperature sensing composite sensors.
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