CN214372615U - Distributed intelligent sensing system for cable tunnel - Google Patents
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- CN214372615U CN214372615U CN202120113314.8U CN202120113314U CN214372615U CN 214372615 U CN214372615 U CN 214372615U CN 202120113314 U CN202120113314 U CN 202120113314U CN 214372615 U CN214372615 U CN 214372615U
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Abstract
The distributed intelligent sensing system for the cable tunnel comprises a monitoring background, an intelligent well lid, a wireless repeater, a sink node, a patrol robot, a tunnel state sensing unit and a cable state sensing unit, and further comprises an MCU (microprogrammed control unit), a power input module, a positioning module, a communication unit, an inclination angle sensing module, a temperature and humidity sensor and an RFID (radio frequency identification) electronic tag. According to the invention, the distributed state monitoring of the cable tunnel can be carried out based on the intelligent well cover, the laying cost of an online monitoring system is saved, the networking mode of the sensor is more flexible, and the safe and reliable operation of cable equipment is ensured.
Description
Technical Field
The utility model relates to a power supply network perception technical field, concretely relates to cable tunnel distributing type intelligence perception system.
Background
With the deep promotion of urbanization construction in China, the power cable becomes an aorta which plays an important role in urban power transmission. High voltage power cable installs in underpass (piping lane or tunnel), and operating environment is comparatively abominable usually, and artifical fortune dimension is not only work load big, inefficiency, and the danger degree is high moreover. The on-line monitoring system is high in laying cost, temperature measuring optical fibers need to be laid for each phase of cable along the whole field of the cable only in one optical fiber temperature measurement, engineering cost is extremely high, and an effective data uploading mode is lacked for a mixed line with two overhead ends and a middle ground.
The manual inspection generally carries out several items of infrared temperature measurement, partial discharge detection and sheath circulation detection, wherein the infrared temperature measurement adopts an infrared thermal imager to measure the temperature of a cable accessory, the partial discharge detection adopts a high-frequency current partial discharge sensor to detect at a cable grounding wire, and the sheath circulation detection adopts a pincerlike ammeter to detect at the cable grounding wire. The inspection personnel need carry multiple instrument, hiking and detect far away to annex department in the passageway, and inspection personnel's load is overweight.
At present, more on-line monitoring devices or rail-mounted inspection robots are installed on cable tunnels, but manual inspection cannot be completely replaced in the aspect of inspection fine effect. The tunnel online monitoring device is mostly connected by wired communication, the construction difficulty is high before the tunnel is put into operation or in the later technical transformation process, for example, the distributed optical fiber temperature measurement needs to lay optical fibers along the whole length of a cable body, and other monitoring modes only set monitoring equipment at accessories have low cost performance and are difficult to ensure the monitoring accuracy; the rail-mounted robot needs to carry out rail construction in the tunnel, is high in cost and long in construction period, is high in harm to personnel in severe environment, and is easy to damage the tunnel structure.
Disclosure of Invention
To the above defect and the improvement demand of prior art, the utility model provides a cable tunnel distributing type intelligence perception system and state evaluation method. The method aims to change the uploading mode of data and a monitoring background, change the sensing and transmission mode of underground cable equipment and environmental state quantity, reduce the construction cost of a monitoring system and ensure the reliable operation of the cable equipment.
The invention adopts the following technical scheme.
The utility model provides a cable tunnel distributing type intelligence perception system, includes that control backstage 1, intelligent well lid 2, a sink node 4, a plurality of wireless repeater 5, at most one patrol and examine robot 6, a plurality of tunnel state perception unit 7 and a plurality of cable state perception unit 8, its characterized in that:
a group of tunnel state sensing units 7 are arranged in the tunnel at intervals of a first distance and are used for acquiring tunnel state data and uploading the data to the sink node 4 through the wireless repeater 5;
a group of cable state sensing units 8 are arranged in the tunnel at intervals of a second distance and are used for acquiring cable state data and uploading the data to the sink node 4 through the wireless repeater 5;
a group of wireless repeaters 5 are arranged at positions in the tunnel at intervals of a third distance and used for sending the received tunnel state data and the received cable state data to the sink node 4;
a set of sink nodes 4 are placed below a wellhead in the tunnel and used for transmitting data sent by the wireless repeater 5 to the intelligent well lid 2.
The tunnel state sensing unit 7 and the cable state sensing unit 8 can also upload the tunnel state data and the cable state data to the inspection robot 6.
The inspection robot 6 is of a hanger rail type or a ground travel type.
The intelligent well lid 2 comprises an MCU main control unit 21, a power input module 22, a positioning module 23, a communication unit 24, an inclination angle sensing module 25, a temperature and humidity sensor 26 and an RFID electronic tag 27.
The MCU main control unit 21 is respectively connected to the positioning module 23, the communication unit 24, the tilt angle sensing module 25, and the temperature and humidity sensor 26, and is configured to receive and process information sent by the positioning module 23, the tilt angle sensing module 25, and the temperature and humidity sensor 26, and send the processed information to the monitoring background 1 through the communication unit 24 via the communication base station according to a set protocol;
the power input module 22 is used for providing a working power supply for the intelligent well lid 2;
the temperature and humidity sensor 26 comprises a temperature, humidity and rainfall sensor, the module is arranged at a lower water hole above the intelligent well cover 2, when the detection information of the temperature and humidity sensor at the lower water hole of the well cover 2 exceeds a set threshold value and the rainfall sensor senses the rainfall information, and meanwhile, when the liquid level information of the liquid level sensor 71 in the water collecting well below the well cover is continuously increased but does not reach an alarm value, the ground weather is judged to be a rainfall state, and a pumping and drainage plan is started in advance;
RFID electronic tags 27 response position in well lid top for the well lid is patrolled and examined discernment.
The inclination angle sensing module 25 adopts an MEMS process inclination angle sensor, and when the monitored inclination angle exceeds a set inclination angle threshold value, the manhole cover is judged to be opened.
The tunnel state sensing unit 7 includes a liquid level sensor 71, a gas sensor 72, a temperature and humidity sensor 73, a smoke sensor 74, and a visible light camera 75 installed in the tunnel.
The liquid level sensor 71 is arranged in a water collecting well in the tunnel or below the intelligent well cover 2, uploads water level sensing information in a wireless mode, and receives a monitoring background instruction by the MCU main control unit 21; when the liquid level information of the liquid level sensor 71 below the well cover or in the water collecting well in the tunnel exceeds an alarm value, the monitoring background judges that the local or most of the accumulated water in the tunnel is out of limit, and at the moment, a pumping and draining plan is started.
The temperature and humidity sensor 73 is arranged in the control cubicle, the terminal box and the structure box and is used for measuring the temperature and humidity in the cubicle;
setting a smoke concentration threshold by an on-board potentiometer, the module outputting a logic level in digital quantity when the smoke sensor (74) detects that the ambient gas concentration exceeds the threshold;
one visible light camera 75 is placed at the middle joint of each group of cables;
the liquid level sensor 71, the temperature and humidity sensor 73 and the smoke sensor 74 are set up in a group, and one group must be placed in the inspection direction under the tunnel.
The cable state sensing unit 8 comprises a wireless temperature sensor 81 arranged on the cable body, and a flexible Roche coil integrated sensor 82 and an infrared thermal imaging camera 83 which are arranged on the cable accessory;
the cable is connected with the intermediate joint grounding box 92 through the cable intermediate joints 91A, 91B and 91C;
installing wireless temperature sensors 81 on the cable body every 10-15 meters, and independently installing the wireless temperature sensors at each phase of the cable;
the flexible rogowski coil integrated sensor 82 adopts a high-frequency flexible rogowski coil, and one flexible rogowski coil is arranged on each phase of the intermediate joint grounding box 92;
an infrared thermal image camera 83 is arranged on the opposite side of the channel where each cable accessory is located, and spectrum monitoring is carried out on infrared thermal images in the range of the whole cable accessory.
Compared with the prior art, the invention has the following advantages:
the utility model discloses establish the data transmission channel of monitoring unit in the pit and control backstage based on intelligent well lid, it is more simple, more flexible than the mode of conventional optic fibre upload to the screen cabinet in the station, the construction cost is lower; the underground monitoring adopts a distributed sensor monitoring mode, the sensor layout cost is low, and the networking is flexible; the state evaluation method integrates the tunnel environment state quantity and the equipment state quantity, and the evaluation is more objective and comprehensive. The system and the method have the advantages of strong universality, quantifiable standard and simple application, can be suitable for cable tunnel projects of various lengths, and particularly have obvious advantages for online monitoring of a mixed line with overhead two sides and ground in the middle.
Drawings
FIG. 1 is a schematic diagram of the overall configuration of a cable tunnel distributed state sensing system according to an embodiment of the present invention;
fig. 2 is a schematic diagram illustrating a configuration of an intelligent manhole cover of a distributed state sensing system of a cable tunnel according to an embodiment of the present invention;
fig. 3 is a schematic diagram of a distributed sensor arrangement at a cable joint in one embodiment of the invention.
The reference numbers in the above figures are as follows:
1-monitoring background;
2-Intelligent well cover;
4-sink node;
5-wireless repeater;
6-inspection robot;
7-tunnel state sensing unit;
8-cable state sensing unit;
21-MCU master control unit;
22-power input module;
23-positioning module;
24 — a communication unit;
25-inclination sensing module;
26-temperature and humidity sensor;
27-RFID electronic tags;
71-liquid level sensor;
72-gas sensor;
73-temperature and humidity sensor;
74-Smoke sensor;
75-visible camera;
81-Wireless temperature sensor;
82-Flexible Rogowski coil sensor;
83-infrared thermal imaging camera;
91A, 91B, 91C-cable middle joint;
92-middle joint grounding box.
Detailed Description
The present application is further described below with reference to the accompanying drawings. The following examples are only for illustrating the technical solutions of the present invention more clearly, and the protection scope of the present application is not limited thereby.
The disclosure of the present invention will be further explained with reference to the accompanying drawings. It is specifically intended that the following description be regarded as illustrative in nature and not as restrictive in any way, since it is intended to limit the disclosure to the precise form disclosed and illustrated. Unless specifically stated otherwise, the relative arrangement of components and steps and numerical expressions and values set forth in the embodiments do not limit the scope of the present disclosure. Additionally, techniques, methods, and apparatus known to those skilled in the art may not be discussed in detail but are intended to be part of the specification where appropriate.
Example 1:
fig. 1 is an embodiment of a distributed intelligent sensing system for a cable tunnel, which is composed of a monitoring background 1, an intelligent well lid 2, a sink node 4, a wireless repeater 5, an inspection robot 6, a tunnel state sensing unit 7, a cable state sensing unit 8 and the like.
The wireless repeater 5 adopts a wireless routing module, provides a wireless stable transmission rate up to 1167Mbps, integrates the functions of a firewall, a router and wired/wireless network connection, is compatible with various standards such as IEEE802.11 a/b/g/n/ac and the like based on the IEEE802.11n standard, can provide a stable transmission rate, is attached with a multiple encryption mechanism, and can ensure the safety of data in the transmission of the Internet of things. The wireless repeaters 5 are used for relaying signals within the tunnel, approximately one every 50-70 meters.
The receiving radius of the sink node 4 can reach 500 meters under the unobstructed environment, and the sink node is placed in a range of 10 meters below a wellhead in the tunnel. All sensors are in wireless communication with sink node 4 devices installed in the tunnel, the sink node 4 devices are in wireless communication with the intelligent well lid and are connected into the monitoring background 1 automatic system to achieve information uploading.
Fig. 2 is a composition structure of the intelligent well lid in the embodiment of the invention. The intelligent well lid 2 further comprises an MCU main control unit 21, a power input module 22, a positioning module 23, a communication unit 24, an inclination angle sensing module 25, a temperature and humidity sensor 26 and an RFID electronic tag 27. The MCU main control unit 21 is respectively connected with the positioning module 23, the communication unit 24, the inclination angle sensing module 25 and the temperature and humidity sensor 26, and the power input module 22 is used for providing a working power supply for the intelligent well lid 2. The MCU main control unit 21 is configured to receive information sent by the positioning module 23, the tilt angle sensing module 25, and the temperature and humidity sensor 26, perform corresponding processing, and send the processed information to the monitoring background 1 through the communication unit 24 via the communication base station according to a set protocol.
The intelligent well lid 2 adopts a positioning module based on GPS or Beidou for providing position information for the intelligent cable well lid of the embodiment. The power supply of intelligence well lid 2 connects the interchange 220 volts below the well lid and regard as power supply, provides the power for location, communication unit and MCU main control unit. The communication unit can realize communication connection with the monitoring background by adopting communication modes such as 4G, 5G communication, LoRa, NB-ioT and the like. The MCU main control unit can adopt MCS-51 series main control units, and can also adopt other main control units without ROM type, EPROM type and EEPROM type. The inclination angle sensing module (25) adopts an MEMS (micro electro mechanical system) process inclination angle sensor and is used for monitoring whether the well lid body is inclined and dislocated or not and position movement caused by theft and the like, when the monitored inclination angle exceeds a set inclination angle threshold value, the well lid body is judged to be opened, namely the well lid body is judged to be opened, and in the embodiment, the set inclination angle threshold value is 10 degrees.
The surface environment sensing module 26 comprises a temperature, humidity and rainfall sensor and is arranged at a lower water hole of the intelligent well lid 2; when the detection information of the temperature and humidity sensor at the water hole under the well cover 2 exceeds the set temperature and humidity threshold value and the rainfall sensor senses the rainfall information, and meanwhile, the liquid level information of the liquid level sensor 71 in the water collecting well under the well cover is continuously increased but does not reach the alarm value, the ground weather is judged to be in a rainfall state, and a pumping drainage plan is started in advance;
RFID electronic tags 27 is prior art, and its induction zone is located the well lid top for the well lid is patrolled and examined discernment.
Example 2:
the present embodiment introduces a specific layout manner of various environmental state quantity sensors.
The tunnel state sensing unit 7 further includes a liquid level sensor 71, a gas sensor 72, a temperature and humidity sensor 73, a smoke sensor 74, and a visible light camera 75, which are installed in the tunnel. In the present embodiment, a group of tunnel installation sensing units 7 are placed at positions spaced 200 meters apart.
Generally, set up level sensor 71 in the sump pit in well lid below or the tunnel, can upload water level perception information transmission through wireless mode to receive the control backstage instruction by MCU main control unit 21, when ponding is transfinite in the tunnel, link with the drainage facility that draws water, start in good time and draw the drainage scheme, prevent that ponding is too deep in the tunnel. And when the water level in the water collecting well exceeds the limit, an alarm signal is sent to the monitoring background 1. The micro-power consumption wireless liquid level sensor can also be a water immersion sensor, is arranged in a cable tunnel and a cable trench, is used for measuring the water immersion state by utilizing the liquid conductive principle, adopts a lithium battery for power supply, and is arranged on the ground at the bottom of the cable tunnel and the cable trench by utilizing bolts.
The ambient gas sensor 72 may be a four-in-one sensor that monitors the carbon monoxide, hydrogen sulfide, oxygen, and methane content of the tunnel gas environment. The detection components of the sensor are mutually independent, and the acquisition mode is diffusion detection. The four measurement ranges of the carbon monoxide sensor, the hydrogen sulfide sensor, the oxygen sensor and the methane sensor are (0-1000) ppm, (0-100) ppm, (0-30.0)% Vol and (0-100)% LEL respectively, and the precision is 1ppm, 0.1% Vol and 1% LEL respectively.
The ambient temperature and humidity sensor 73 is a TH 06I 2C temperature and humidity sensor. The measurement ranges of the temperature and humidity sensors are 0-85% RH and-10- +85 ℃, and the maximum errors are +/-4% RH and +/-0.5 ℃. The micro-power consumption wireless temperature and humidity sensor can also be arranged in a control cubicle, a terminal box and a structure box and used for measuring the temperature and humidity in the box/cabinet, the sensor is powered by a lithium battery and is arranged on the inner wall of the box/cabinet by utilizing a magnet or a double faced adhesive tape, and the environment tolerance is high.
The smoke sensor 74 is a plasma sensor module, has high sensitivity to gases such as combustible gas and smoke, and has a smoke concentration threshold set by an on-board potentiometer, and outputs a logic level as a digital value when detecting that the ambient gas concentration exceeds the threshold.
The three sensors are generally set up in groups, and six-in-one functional sensors can also be adopted. Generally, one group is placed every 200 meters, and one group must be placed underground the tunnel along the inspection direction.
The visible light image sensor adopts a low-power-consumption camera and has the second-level quick awakening dormancy capability. The visible light image sensor works in a network-free and electricity-free environment and is powered by a battery. The system adopts a low-power module G8100, the average power consumption is 5mA, and the awakening speed is 1-2 s. And under the photographing function, the embedded system mainboard is communicated with the G8100 through a serial port to capture the H.264 code stream. The visible light image sensors are placed approximately one at the middle joint of each group of cables.
Example 3:
the embodiment introduces a specific layout mode of various cable body state quantity sensors. Fig. 3 shows a schematic diagram of a distributed sensor arrangement at a cable joint according to the present embodiment. The cable state sensing unit 8 further comprises a wireless temperature sensor 81 installed on the cable body, and a flexible rogowski coil integrated sensor 82 and an infrared thermal imaging camera 83 installed on the cable accessory. The cables are connected to the intermediate joint ground box 92 through cable intermediate joints 91A, 91B, 91C. In the present embodiment, a group of cable status sensing units 8 are placed at intervals of 400-500 meters.
The wireless temperature sensor 81 is a distributed micro-power consumption wireless temperature sensor arranged on the cable body, the sensor adopts an induced current energy obtaining mode, one sensor is arranged every 15-20 meters, and each phase of the cable is independently arranged.
The flexible rogowski coil sensor 82 is a high-frequency flexible rogowski coil, and has the advantages of good linearity, high dynamic range, strong overload capacity, small interference by adjacent conductors, low danger, zero power consumption, small error, convenience in installation and the like. Rogowski coil (
Coil) is also called current measuring coil, differential current transformer, and is a ring coil uniformly wound on non-ferromagnetic material. The output signal is the current differential over time. The output current can be truly restored by a circuit which integrates the output voltage signal. Compared with the traditional mutual inductor with the iron core, the Rogowski coil has the characteristics of real-time measurement of current, high response speed, no saturation and almost no phase error. In this embodiment, the coil current ranges from 1A to 1000kA, and the bandwidth ranges from 1Hz to 50MHz (-3 dB). The coil body adopts wire and cable thermoplastic rubber, and the coil and the signal cable adopt double-layer shielding, thereby greatly improving the external appearanceAnd (4) anti-interference capability.
The flexible rogowski coil integrated sensor is composed of a flexible rogowski coil broadband sensor, a composite integrator and a wireless module, wherein the flexible rogowski coil broadband sensor is arranged on a cable grounding wire, the coil current range is 1A-1000 kA, the bandwidth is 1Hz-50MHz, and the coil and a signal cable adopt double-layer shielding and can simultaneously induce power frequency grounding current and local discharge high-frequency current; the output of the flexible Roche coil broadband sensor is connected with the composite integrator, and data are networked through the wireless module. The composite integrator adopts a miniaturized and modularized design, and the application level threshold of the Rogowski coil is greatly reduced; the flexible Rogowski coil integrated sensor is provided with one sensor on each phase of the grounding box and adopts a wireless data uploading mode.
The infrared thermal image camera 83 is a low-power thermal image sensor installed on the opposite side of the channel where the cable accessory is located, and is used for performing spectrum monitoring on infrared thermal images in the range of the whole accessory. That is, each accessory is provided with a sensor for monitoring the range of the accessory. The infrared thermal imaging camera 83 adopts an ultra-low power consumption infrared thermal imaging module Xmodule T3, and can realize the output of high frame frequency images of 25Hz per second and real-time full frame temperature data. The Xmodule T3 integrates an infrared temperature measurement and temperature compensation algorithm TCA +, and has higher temperature measurement accuracy. The Xmodule T3 has rich interfaces, supports parallel digital/USB interface output and I2C/SPI control interface. And the system can be directly accessed to a back-end video processing platform by adopting a standard protocol. Xmodule T3 is light weight, low power consumption, less than 0.3W, and weighs only 28 g.
The embodiments have verified the remarkable advantages of wide applicability, flexibility, simplicity and the like of the method.
While the present disclosure has been described with reference to exemplary embodiments, it should be understood that the present disclosure is not limited to the exemplary embodiments described above. It will be apparent to those skilled in the art that the above-described exemplary embodiments may be modified without departing from the scope and spirit of the disclosure. The scope of the following claims is to be accorded the broadest interpretation so as to encompass all such modifications and equivalent structures and functions.
Claims (10)
1. The utility model provides a cable tunnel distributing type intelligence perception system, is including control backstage (1), intelligent well lid (2), a sink node (4), a plurality of wireless repeater (5), at most one patrols and examines robot (6), a plurality of tunnel state perception unit (7) and a plurality of cable state perception unit (8), its characterized in that:
a group of tunnel state sensing units (7) are arranged in the tunnel at intervals of a first distance and used for acquiring tunnel state data and uploading the data to the sink node (4) through the wireless repeater (5);
a group of cable state sensing units (8) are arranged in the tunnel at intervals of a second distance and used for acquiring cable state data and uploading the data to the sink node (4) through the wireless repeater (5);
installing a group of wireless repeaters (5) at positions spaced by a third distance in the tunnel, and sending the received tunnel state data and the received cable state data to a sink node (4);
a group of sink nodes (4) are placed below a wellhead in the tunnel and used for transmitting data sent by the wireless repeater (5) to the intelligent well lid (2).
2. The smart perception system of claim 1, wherein:
the tunnel state sensing unit (7) and the cable state sensing unit (8) can also upload tunnel state data and cable state data to the inspection robot (6).
3. The smart perception system according to claim 1 or 2, wherein:
the inspection robot (6) is of a hanger rail type or a ground traveling type.
4. The smart perception system according to claim 1 or 2, wherein:
the intelligent well lid (2) comprises an MCU main control unit (21), a power input module (22), a positioning module (23), a communication unit (24), an inclination angle sensing module (25), a temperature and humidity sensor (26) and an RFID electronic tag (27).
5. The smart perception system of claim 4, wherein:
the MCU main control unit (21) is respectively connected with the positioning module (23), the communication unit (24), the inclination angle sensing module (25) and the temperature and humidity sensor (26) and is used for receiving and correspondingly processing information sent by the positioning module (23), the inclination angle sensing module (25) and the temperature and humidity sensor (26) and then sending the information to the monitoring background (1) through the communication base station through the communication unit (24) according to a set protocol;
the power input module (22) is used for providing a working power supply for the intelligent well lid (2);
the temperature and humidity sensor (26) comprises a temperature and humidity sensor and a rainfall sensor, the module is arranged at a lower water hole above the intelligent well cover (2), when the detection information of the temperature and humidity sensor at the lower water hole of the well cover (2) exceeds a set threshold value and the rainfall sensor senses the rainfall information, and meanwhile, when the liquid level information of a liquid level sensor (71) in a water collecting well below the well cover is continuously increased but does not reach an alarm value, the ground weather is judged to be in a rainfall state, and a pumping and draining plan is started in advance;
RFID electronic tags (27) response zone bit is located the well lid top for the well lid is patrolled and examined the discernment.
6. The smart perception system of claim 4, wherein:
the inclination angle sensing module (25) adopts an MEMS (micro electro mechanical system) process inclination angle sensor, and when the monitored inclination angle exceeds a set inclination angle threshold value, the well lid is judged to be opened.
7. The smart perception system according to claim 1 or 2, wherein:
the tunnel state sensing unit (7) comprises a liquid level sensor (71), a gas sensor (72), a temperature and humidity sensor (73), a smoke sensor (74) and a visible light camera (75) which are installed in the tunnel.
8. The smart perception system of claim 7, wherein:
the liquid level sensor (71) is arranged in a water collecting well in the tunnel or below the intelligent well cover (2), uploads water level sensing information in a wireless mode, and receives a monitoring background instruction through the MCU (microprogrammed control unit) (21); when the liquid level information of a liquid level sensor (71) below the well cover or in the water collecting well in the tunnel exceeds an alarm value, the monitoring background judges that the local or most of the accumulated water in the tunnel exceeds the limit, and at the moment, a pumping and draining plan is started.
9. The smart perception system of claim 7, wherein:
the temperature and humidity sensor (73) is arranged in the control cubicle, the terminal box and the structure box and is used for measuring the temperature and humidity in the cubicle;
setting a smoke concentration threshold by an on-board potentiometer, the module outputting a logic level in digital quantity when the smoke sensor (74) detects that the ambient gas concentration exceeds the threshold;
the visible light cameras (75) are placed one at each group of cable intermediate joints;
the liquid level sensor (71), the temperature and humidity sensor (73) and the smoke sensor (74) are set up in a group, and a group of sensors must be placed in the tunnel underground along the inspection direction.
10. The smart perception system according to claim 1 or 2, wherein:
the cable state sensing unit (8) comprises a wireless temperature sensor (81) arranged on a cable body, a flexible Rogowski coil integrated sensor (82) and an infrared thermal image camera (83) which are arranged on a cable accessory;
the cable is connected with the intermediate joint grounding box (92) through cable intermediate joints (91A, 91B and 91C);
the wireless temperature sensors (81) are installed on the cable body every 10-15 meters and are installed at each phase of the cable separately;
the flexible Rogowski coil integrated sensor (82) adopts a high-frequency flexible Rogowski coil, and one flexible Rogowski coil is arranged on each phase of the intermediate joint grounding box (92);
and arranging one infrared thermal image camera (83) at the opposite side of the channel where each cable accessory is positioned, and carrying out spectrum monitoring on the infrared thermal images in the range of the whole cable accessory.
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| CN202120113314.8U CN214372615U (en) | 2021-01-15 | 2021-01-15 | Distributed intelligent sensing system for cable tunnel |
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| CN113958911A (en) * | 2021-11-01 | 2022-01-21 | 国网北京市电力公司 | Well lid and street lamp system |
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