CN111207793B - Cable tunnel environment monitoring device and system - Google Patents
Cable tunnel environment monitoring device and system Download PDFInfo
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- CN111207793B CN111207793B CN202010164692.9A CN202010164692A CN111207793B CN 111207793 B CN111207793 B CN 111207793B CN 202010164692 A CN202010164692 A CN 202010164692A CN 111207793 B CN111207793 B CN 111207793B
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- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D21/00—Measuring or testing not otherwise provided for
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Abstract
The invention discloses a cable tunnel environment monitoring device and system, and belongs to the field of maintenance and inspection of power equipment. The cable tunnel environment monitoring device comprises a data acquisition terminal and a data forwarding module, wherein the data acquisition terminal is used for acquiring environment data, and the data forwarding terminal is used for collecting the data of the data acquisition terminal and forwarding the data to a superior dispatching system. The data acquisition terminal is provided with an environment detection sensor, and has the functions of detecting the environment temperature and humidity and the air flow in the cable tunnel. Simultaneously, the device has the function of detecting the opening of the well cover or the cable cover plate. And data acquired by the terminal is uploaded to a dispatching system through the Internet of things, and a field environment basis is provided for personnel performing operation and maintenance inspection.
Description
Technical Field
The invention relates to the field of maintenance and inspection of power equipment, in particular to a cable tunnel environment monitoring device and system.
Background
With the pursuit of urban development on beauty, the power cable is mostly realized by adopting a cable tunnel arrangement mode. The cable tunnel is a dangerous place due to the low terrain, humid environment and high voltage and high current of the cable tunnel. However, due to the harsh environment, regular maintenance is required to find out hidden troubles to ensure the safety of the equipment. In the prior art, temperature and humidity environments of a cable tunnel, partial discharge of a cable and temperature are detected. However, certain harmful gases such as carbon dioxide can be deposited in the cable tunnel after long-term placement, and the damage to constructors can be caused when the harmful gases enter the cable tunnel. Therefore, a ventilation process is required before entry. When the cable tunnel is damaged, the air flow inside the cable tunnel also has a transformation ratio, so that the problem generated by the cable tunnel can be found by detecting the change of the air flow. For example, when the cable tunnel well lid is opened, the phenomenon that the airflow flows in and out can occur. Further, gas leakage from electrical equipment in tunnels, for example, can also cause gas flow. Therefore, it is an urgent requirement to design a cable tunnel environment monitoring device capable of detecting the airflow of the cable tunnel.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: the utility model provides a cable tunnel environment monitoring device and system has the inside air current condition of flowing of detection cable tunnel, environment humiture and the function that cable well lid opened.
The technical scheme of the technical problem to be solved by the invention is as follows:
the cable tunnel environment monitoring device is characterized by comprising a data acquisition terminal and a data forwarding module. The data acquisition terminal is provided with a power supply module, a microcontroller, a lower-level communication module and a sensor interface; the data forwarding module comprises a controller, a lower-level communication module, a power supply module and a higher-level communication module; the data forwarding module and the data acquisition terminal transmit data through a lower-level communication module, and the data forwarding module uploads the acquired data to the scheduling system through a higher-level communication module; the data acquisition terminal is equipped with a plurality ofly, the sensor of data acquisition terminal's sensor interface connection includes cable joint partial discharge detection module, environment detection sensor, cable temperature sensor, smoke detector alarm, gas sensor.
Preferably, the environment detection sensor comprises an extension rod, a junction station and a flow channel. The junction station is provided with a hollow cavity of an outlet and is fixedly connected with the end part of the extension rod; the runner main body is tubular and one end of the runner main body is communicated with an outlet of the junction station. The runner is provided with two air pipes, a detection plate and a flexible pipe. Two ends of the detection plate are respectively and fixedly connected with the end part of the air pipe; the flexible pipe is communicated with the two air pipes to form a pipeline; a Hall sensor is arranged in the middle of the detection plate; and the position of the flexible pipe corresponding to the Hall sensor is provided with a magnetic sheet.
Preferably, the free end of the gas pipe far away from the junction station is flared to collect gas.
Preferably, the number of the flow passages is two, and the two flow passages are arranged in a straight line or are vertically crossed; or the number of the flow passages is three, wherein two flow passages are arranged in a straight line, and the other flow passage is vertical to the other two flow passages; or four runners are arranged; or the number of the branches of the flow channel and the cable tunnel intersection is the same, and the flow channel is respectively placed in the tunnel branches with the length direction parallel to the trend of the cable tunnel branches.
Preferably, the junction station is spherical, the upper part of the junction station is provided with detection holes, and the detection holes are uniformly distributed along the circumference; or the junction station is a cylinder, the upper part of the junction station is provided with a chamfer or a fillet, and the upper plane and the chamfer surface or the fillet surface of the junction station are provided with detection holes; a photosensitive diode is arranged in the detection hole; the detection holes are provided with 1-3 circles, and the length direction of the detection holes is perpendicular to the surface of the junction station.
Preferably, the magnetic sheets are provided with two magnetic sheets, and the two magnetic sheets have different polarities facing to one surface of the hall sensor.
Better, the tip of pick-up plate is equipped with the trigger shrinkage pool, it is equipped with trigger switch to trigger the shrinkage pool bottom, it has the direction detection pole to trigger the inside grafting of shrinkage pool, be equipped with the spring between direction detection pole and the trigger shrinkage pool bottom, the tip in the outside of direction detection pole is equipped with the aerofoil. The cross section of the wind receiving plate is semicircular, the length direction of the wind receiving plate is parallel to the plane where the detection plate is located and is overlapped with the radial direction of the air pipe, the length of the wind receiving plate is smaller than the inner diameter of the air pipe, and the diameter of the wind receiving plate is larger than the thickness of the detection plate.
Preferably, a temperature and humidity sensor is arranged inside the junction station or on the surface of the shell, and the flow channel is provided with an air valve; or a temperature and humidity sensor is arranged on the surface of the bus shell.
The utility model provides a cable tunnel environmental monitoring system, uses above-mentioned cable tunnel environmental monitoring device which characterized in that:
the data forwarding modules are uniformly distributed in the cable tunnel, a fixed seat is arranged at the upper part of an extension rod of an environment detection sensor of the data acquisition terminal, and the fixed seat and the extension rod are detachably connected in a clamping manner; the fixed seat is fixedly arranged on the side wall or the top of the cable tunnel, and the junction station is positioned in the middle of the cable tunnel; a scheduling system is also included. And the data forwarding module collects data of the data acquisition terminal and forwards the data to the scheduling system.
The method for monitoring the environment of the cable tunnel environment monitoring system is characterized by comprising the following steps: three flow passages of the environment detection sensors at the three-fork of the cable tunnel are provided, and the environment detection sensors are arranged at the lower part of a well cover of the cable tunnel;
the method comprises the following steps:
the method comprises the steps of collecting environment detection sensors in the tunnel and trigger switches of the environment detection sensors at the three-fork, and determining the airflow direction of the positions of the environment detection sensors by the trigger switches at two ends of a detection plate. And collecting the air flow directions of all the environment detection sensor positions in the tunnel and determining the whole air flow direction in the tunnel. And acquiring the output value of a Hall sensor of a detection plate inside the environment detection sensor in the tunnel, and calculating the size of the airflow according to the voltage output value of the Hall sensor. And starting the fan when the maintenance is needed, and judging whether the gas environment permits personnel to enter according to the size of the gas flow in the cable tunnel and the gas sensor. When the air current is detected to be too large in normal detection, the starting of the ventilation machine or the opening or the damage of a well cover or a cover plate of the cable tunnel are explained, an alarm signal is sent at the moment, all regions with the too large air current are screened out, the fault region is locked and locked according to the regions with the too large air current, and finally designated personnel go to the fault region to inspect and maintain. Collecting on-off information of a photosensitive diode of an environment detection sensor in the tunnel, and when a light source is detected, indicating that the well cover is opened or broken; at the moment, the alarm information is uploaded to the dispatching system and sent to relevant technicians to carry out inspection and maintenance on the cable tunnel.
The invention has the beneficial effects that:
1. detecting the air flowing condition inside the cable tunnel or the cable trench;
2. the device has the function of detecting the opening or damage of a cable trench cover plate or a cable tunnel well cover;
drawings
FIG. 7 is a system diagram of a cable tunnel monitoring system according to the present invention
FIG. 6 is an enlarged view of the area A in FIG. 5
FIG. 5 is a cross-sectional view of a flow passage of one embodiment of the present invention
FIG. 4 is a cross-sectional view of a flow passage of one embodiment of the present invention
FIG. 3 is a top view of an embodiment of the present invention
FIG. 2 is a partial cross-sectional view of one embodiment of the present invention
FIG. 1 is a schematic diagram of an embodiment of the present invention
In the figure:
900. a scheduling system; 700. a data forwarding module; 800. a data acquisition terminal; 316. a wind receiving plate; 315. a spring; 314. a direction detecting lever; 313. a trigger switch; 312. triggering a concave hole; 211. a photodiode; 331. a magnetic sheet; 311. a Hall sensor; 210. a detection hole; 330. a flexible tube; 320. an air tube; 310. detecting a plate; 300. a flow channel; 200. a junction station; 100. an extension rod;
Detailed Description
In order to make the technical solution and the advantages of the present invention clearer, the following explains embodiments of the present invention in further detail.
The invention discloses a cable tunnel environment monitoring device and a cable tunnel environment monitoring system composed of the monitoring device.
The cable tunnel environment monitoring apparatus includes a data acquisition terminal 800 and a data forwarding module 700. The number of the data acquisition terminals 800 is plural, and various environment variables and electric quantities inside the tunnel environment can be detected. The data forwarding module 700 is configured to receive all the environmental data collected by the data collection terminal 800 and forward the environmental data to the upper scheduling system.
The data acquisition terminal 800 is provided with a power module, a microcontroller, a subordinate communication module, and a sensor interface, wherein the power module is used for supplying power to a data acquisition system composed of the microcontrollers, and is electrically connected with commercial power or a battery. The microcontroller is used for processing data. The lower communication module is electrically connected to the microcontroller to forward data processed by the microcontroller to the data forwarding module 700. The sensor interface is used for connecting the sensor and the microcontroller. The sensor connected with the sensor interface comprises a cable joint partial discharge detection module, an environment detection sensor, a cable temperature sensor, a smoke sensing alarm and a gas sensor. The partial discharge detection module is used for detecting the partial discharge condition at the cable joint. The environment detection sensor is used for detecting environment variables inside the cable tunnel. The cable temperature sensor is used for detecting the temperature of the cable. The smoke detector is used for detecting fire. The gas sensors mainly comprise oxygen, carbon dioxide, carbon monoxide, methane and other gas sensors, so that maintenance personnel are prompted to forbid the carbon dioxide deposition.
The data forwarding module 700 includes a controller, a lower communication module, a power module, and an upper communication module. The power module provides power for the controller. The controller is electrically connected with the upper and lower communication modules, receives data of the data acquisition terminal 800 through the lower communication module, packages the data, and uploads the acquired data to the scheduling system through the upper communication module.
In the prior art, an environment detection sensor mainly detects temperature and humidity data. However, the air flow in the cable tunnel is also very important, especially ventilation is needed before long-term cable tunnel construction operation, so ventilation is needed in the tunnel section needing construction, and good ventilation of the tunnel section is ensured. The detection of ventilation for a particular tunnel section is therefore required to ensure the safety of the constructors. The environment detection sensor has an airflow detection function.
The environment detection sensor includes: extension rod 100, flow combiner 200, runner 300.
In the prior art, sensors are installed on a tunnel wall, and due to the fact that the environment inside a tunnel is stuffy and wet, the temperature and humidity of the tunnel wall installed on the tunnel wall have large influence on the temperature and humidity, and therefore the detection structure is inaccurate. The invention adopts equipment of an extension rod 100 to place the detection module in the middle of the cable tunnel, so that the detection structure is closer to a real environment. The upper end of the extension rod 100 is connected to the tunnel wall. Can be fixedly connected or hinged. When the hinged connection is adopted, the movable support can be conveniently swung to the upper part and attached to the tunnel wall in the construction process, and further construction is not influenced. The lower end of the extension rod 100 is fixedly connected with the junction station 200.
The junction station 200 is a hollow cavity with an outlet. Be used for circulating gas in the ware 200 that converges, its inside temperature and humidity sensor that can install is used for detecting the humiture, perhaps temperature and humidity sensor locates on the outer wall of the casing of ware 200 that converges.
The junction station 200 is spherical or the junction station 200 is cylindrical. When the junction station 200 is a cylinder, the upper part of the cylinder is provided with a chamfer or fillet. In order to detect that the well lid of the cable tunnel or the cover plate of the cable trench is opened or damaged, the upper part of the junction station 200 is provided with a detection hole 210, or the upper plane and the chamfered surface or the rounded surface of the junction station 200 are provided with detection holes 210. The detection holes 210 are evenly distributed along the circumference. The photodiode 211 is disposed inside the detection hole 210. The photodiode 211 is electrically connected to the microcontroller via a sensor interface.
Under normal conditions, cable tunnel is inside to be the confined environment, consequently does not have the inside that light got into cable tunnel, and in cable trench's apron department or cable tunnel's well lid department, when cable apron or well lid are opened, will have the light to get into, and then can detect cable tunnel well lid and open or destroyed. In the prior art, only the function of detecting the opening of the cable tunnel well lid is realized, but the invention can not only detect that the well lid is opened, but also detect when the well lid is damaged, thereby ensuring the safety of pedestrians on the road surface and improving the maintenance efficiency of the cable tunnel well lid.
Or, an illumination sensor or a brightness sensor is arranged in the detection hole and used for detecting illumination intensity or brightness. The light sensor or the brightness sensor is used for replacing the photosensitive diode, so that the detection effect of light is achieved, and the intensity of light can be detected. Illumination intensity probably reaches a certain value under the normal condition, and illumination intensity grow after cable cover plate or cable well lid are damaged or open, and then can send the warning.
The cover plate is adopted to the cable pit more, and in order to detect many cover plates, inspection hole 210 is equipped with many circles, can detect the light of different positions. Preferably, the detection hole 210 has 1-3 circles, and the detection hole 210 is located at the upward housing portion of the junction station.
The flow channel 300 is used to detect the condition of the airflow. The flow channel 300 has a main body shape of a pipe and one end communicates with an outlet of the junction station 200. The flow path 300 includes two air tubes 320 and a sensing plate 310 and a flexible tube 330.
The two air tubes 320 are rigid tubes, and the air tube main body cannot deform. The two air pipes 320 are communicated through a flexible pipe 330 to form a pipeline. The detection plate 310 is disposed inside the flexible tube 330, and both ends of the detection plate 310 in the length direction are fixedly connected to the end portions of the two air tubes 320, respectively. The middle part of the detection plate 310 is provided with a Hall sensor 311, and the flexible pipe 330 is provided with a magnetic sheet 331 at a position corresponding to the Hall sensor 311. The magnetic sheet 331 is close to or far away from the hall sensor, the magnetic field intensity at the position of the hall sensor changes, and the hall sensor outputs different voltage values due to the change of the magnetic field intensity. Preferably, to avoid the influence of gravity, the air pipes 320 are arranged in a right-angled shape, and the flexible pipe 330 is communicated with the vertical portions of the two air pipes 320. In order to prevent the vertical flexible pipe 330 from being affected by the airflow in the horizontal direction, a large pipe is sleeved outside the flexible pipe 330, and two ends of the large pipe are fixedly connected with the air pipe 320.
Preferably, two magnetic sheets 331 are provided to make the output of the hall sensor more sensitive, and the polarities of the surfaces of the two magnetic sheets 331 facing the hall sensor 311 are different. At this moment, when there is the gas circulation in trachea 320 inside, the inside pressure of trachea and the outside pressure of trachea are different, and then the deformation of flexible pipe 330 is different, lead to the magnetic sheet to be different apart from hall sensor's distance, lead to the magnetic field intensity that hall sensor detected different, and then export different voltage. And then the voltage of the output of the Hall sensor is converted into the size of the airflow.
Because different structures can lead to different output voltages, in the using process, the attraction force of the magnetic sheet 331 and the tension of the flexible pipe 330 reach a balance state, and the inner pressure and the outer pressure generated by the airflow change the flexible pipe 330 to reach a new balance state, so that the voltage values output by different airflow Hall sensors can be tested in an air duct testing mode, and then after the airflow is detected, the size of the airflow is converted in a table look-up mode according to the values of the Hall sensors.
In order to ensure the difference between the internal and external air pressures of the trachea, the flow channel 300 is arranged inside the large sealed trachea. Namely, a large pipeline with a diameter larger than that of the air pipe of the flow channel 300 is arranged at the outer side of the flow channel 300, and the two ends of the large pipeline are sealed with the flow channel.
To ensure that the gas flow in the flow channel is sufficient to drive the flexible tube 330, the free end of the gas tube 320 remote from the flow combiner 200 is flared to collect the gas.
The number of branches of the tunnel differs due to the different locations of the cable tunnel. The number of flow channels and the number of exit openings of the flow combiner are different.
In the interior of the straight-through cable tunnel, one or two flow passages can be arranged, and when the two flow passages are arranged, the two flow passages are arranged in a straight line.
At the corner of cable tunnel, the runner is equipped with two, and the contained angle of two runners is the same with the contained angle of two branches in cable tunnel. At right-angle corners, the two flow channels are vertically crossed and are respectively the same as the directions of the cable tunnel branches.
At the three-fork or cross-shaped opening, three or four flow passages can be arranged. Three flow channels 300 are provided, two of which are aligned and the other flow channel 300 is perpendicular to the other two flow channels.
The number of the branches of the flow channel 300 and the cable tunnel intersection is the same, and the length direction of the flow channel 300 is parallel to the direction of the cable tunnel branches.
The hall sensor is used for detecting the size of the air flow and also needs to detect the direction of the air flow. The end of the detection plate 310 is provided with a trigger recess hole 312. The bottom of the trigger concave hole 312 is provided with a trigger switch 313. A direction detecting rod 314 is inserted into the triggering concave hole 312. A spring 315 is arranged between the direction detection rod 314 and the bottom of the trigger concave hole 312. The direction detection lever 314 is provided with a wind receiving plate 316 at an outer end thereof. The length direction of the detection plate is parallel to the length direction of the trachea, and the width direction of the detection plate 310 is the same as the radial direction of the trachea. The length direction of the air receiving plate 316 is parallel to the plane of the detecting plate 310, and the length of the air receiving plate 316 is smaller than the inner diameter of the air pipe 320. The cross-sectional shape of the air receiving plate 316 is semicircular. The thickness of the windward plate 316 is greater than the thickness of the detection plate 310. When wind blows the wind receiving plate, the wind receiving plate drives the direction detection rod to trigger the trigger switch 313, and because two trigger switches 313 are arranged at two ends of the detection plate, the trigger switch at which end is triggered indicates that the air flow enters from which end.
Preferably, when the temperature and humidity sensor is arranged inside the junction station, an air valve or a valve is arranged inside the flow channel, the air valve is an electric air valve, and the air valve is electrically connected with the microcontroller. When the environment temperature and humidity are required to be detected, the air valve is opened for detection, and when the environment temperature and humidity are not required to be detected, the air valve is closed and opened when the environment temperature and humidity are required to be detected, so that the service life of the temperature and humidity sensor can be prolonged.
The device can be used for forming a cable tunnel environment monitoring system. The system comprises the following components: a scheduling system 900 and data forwarding modules 700 evenly distributed in the cable tunnel. One data forwarding module 700 is configured to be associated with a plurality of data acquisition terminals 800.
The upper portion of the extension rod 100 of the environment detection sensor of the data acquisition terminal 800 is provided with a fixing seat. The fixing base is detachably connected with the extension rod 100 in a clamping mode. The fixing seat is fixedly installed on the side wall or the top of the cable tunnel. The combiner 200 is located in the middle of the cable tunnel.
The data forwarding module 700 collects data of the data collection terminal 800 and forwards the data to the scheduling system 900.
The method for detecting the cable tunnel environment by applying the system comprises the following steps:
three flow passages 300 of the environment detection sensor are arranged at the three intersections of the cable tunnel. Two flow passages of the environment detection sensor are arranged at the corners of the cable tunnel. The environment detection sensor is also arranged at the lower part of the well cover of the cable tunnel.
The detection method comprises the following steps:
the trigger switches 313 of the environment detection sensors in the collecting tunnel and the environment detection sensors at the three-fork are connected, and the trigger switches 313 at the two ends of the detection plate 310 determine the airflow direction of the positions of the environment detection sensors.
And collecting the air flow directions of all the environment detection sensor positions in the tunnel and determining the whole air flow direction in the tunnel.
And acquiring the output value of the Hall sensor 311 of the detection plate 310 in the environment detection sensor in the tunnel, and calculating the size of the airflow according to the voltage output value of the Hall sensor 311.
The fan needs to be started when the maintenance is needed. And judging whether personnel are permitted to enter the gas environment inside the tunnel or not and whether the gas circulates or not according to the size of the gas flow inside the cable tunnel and the gas sensor.
During normal detection, when excessive air flow is detected, the ventilation machine is started or a well cover or a cover plate of a cable tunnel is opened or damaged, an alarm signal is sent at the moment, all regions with excessive air flow are screened out, a fault region is locked and locked according to the regions with excessive air flow, and finally designated personnel go to the fault region to perform routing inspection and maintenance;
collecting on-off information of a photodiode 211 of an environment detection sensor in the tunnel, and when a light source is detected, indicating that the well cover is opened or broken; at the moment, the alarm information is uploaded to the dispatching system and sent to relevant technicians to carry out inspection and maintenance on the cable tunnel.
In summary, the present invention is only a preferred embodiment, and is not intended to limit the scope of the present invention, and various changes and modifications can be made by workers in the light of the above description without departing from the technical spirit of the present invention. The technical scope of the present invention is not limited to the content of the specification, and all equivalent changes and modifications in the shape, structure, characteristics and spirit described in the scope of the claims of the present invention are included in the scope of the claims of the present invention.
Claims (8)
1. Cable tunnel environment monitoring device, its characterized in that:
comprises a data acquisition terminal (800) and a data forwarding module (700),
the data acquisition terminal (800) is provided with a power supply module, a microcontroller, a lower-level communication module and a sensor interface;
the data forwarding module (700) comprises a controller, a lower-level communication module, a power supply module and a higher-level communication module;
the data forwarding module (700) and the data acquisition terminal (800) transmit data through a lower-level communication module, and the data forwarding module (700) uploads the acquired data to the scheduling system through a higher-level communication module;
the data acquisition terminal (800) is provided with a plurality of sensors, and the sensors connected with the sensor interfaces of the data acquisition terminal (800) comprise a cable joint partial discharge detection module, an environment detection sensor, a cable temperature sensor, a smoke alarm and a gas sensor;
the environment detection sensor includes:
an extension rod (100);
the junction station (200) is provided with a hollow cavity of an outlet and is fixedly connected with the end part of the extension rod (100);
a flow channel (300) having a tubular main body shape and one end communicating with an outlet of the flow combiner (200);
the runner (300) is provided with:
two air tubes (320);
the two ends of the detection plate (310) are respectively and fixedly connected with the end part of the air pipe (320);
the flexible pipe (330) is communicated with the two air pipes (320) to form a pipeline;
a Hall sensor (311) is arranged in the middle of the detection plate (310);
and a magnetic sheet (331) is arranged at the position of the flexible pipe (330) corresponding to the Hall sensor (311).
2. The cable tunnel environment monitoring device according to claim 1, wherein:
the free end of the gas pipe (320) far away from the junction station (200) is flared for collecting gas.
3. The cable tunnel environment monitoring device according to claim 1, wherein:
the number of the flow channels (300) is two, and the two flow channels (300) are arranged in a straight line or are vertically crossed;
or the flow channels (300) are provided with three, two of the flow channels are arranged in a straight line, the other flow channel (300) is vertical to the other two flow channels,
or four flow passages (300) are arranged,
or the number of the branches of the flow channel (300) and the cable tunnel intersection is the same, and the flow channel (300) is respectively placed in the tunnel branches with the length direction parallel to the trend of the cable tunnel branches.
4. The cable tunnel environment monitoring device according to claim 1, wherein:
the junction station (200) is spherical, the upper part of the junction station (200) is provided with detection holes (210), and the detection holes (210) are uniformly distributed along the circumference;
or the junction station (200) is a cylinder, the upper part of the junction station (200) is provided with a chamfer or a fillet, and the plane of the upper part of the junction station (200) and the chamfer surface or the fillet surface are provided with detection holes (210);
a photosensitive diode (211) is arranged in the detection hole (210);
the detection holes (210) are provided with 1-3 circles, and the length direction of the detection holes (210) is perpendicular to the surface of the junction station (200).
5. The cable tunnel environment monitoring device according to claim 1, wherein:
the magnetic sheets (331) are provided with two magnetic sheets (331), and the polarities of the surfaces, facing the Hall sensor (311), of the two magnetic sheets (331) are different.
6. The cable tunnel environment monitoring device according to claim 1, wherein:
a triggering concave hole (312) is formed in the end portion of the detection plate (310), a triggering switch (313) is arranged at the bottom of the triggering concave hole (312), a direction detection rod (314) is inserted into the triggering concave hole (312), a spring (315) is arranged between the direction detection rod (314) and the bottom of the triggering concave hole (312), a wind receiving plate (316) is arranged at the end portion of the outer side of the direction detection rod (314),
the cross section of the air receiving plate (316) is semicircular, the length direction of the air receiving plate (316) is parallel to the plane of the detection plate (310) and is overlapped with the radial direction of the air pipe (320), the length of the air receiving plate (316) is smaller than the inner diameter of the air pipe (320), and the diameter of the air receiving plate (316) is larger than the thickness of the detection plate (310).
7. The cable tunnel environment monitoring device according to claim 1, wherein:
a temperature and humidity sensor is arranged in the junction station (200) or on the surface of the shell, and an air valve is arranged in the flow channel (300);
or a temperature and humidity sensor is arranged on the surface of the shell of the junction station (200).
8. A cable tunnel environment monitoring system to which the cable tunnel environment monitoring apparatus of claim 1 is applied, characterized in that:
the data forwarding modules (700) are evenly distributed in the cable tunnel,
a fixed seat is arranged at the upper part of an extension rod (100) of an environment detection sensor of the data acquisition terminal (800), and the fixed seat is detachably connected with the extension rod (100) in a clamping manner;
the fixed seat is fixedly arranged on the side wall or the top of the cable tunnel, and the junction station (200) is positioned in the middle of the cable tunnel;
also included is a scheduling system (900),
the data forwarding module (700) collects data of the data acquisition terminal (800) and forwards the data to the scheduling system (900).
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| CN205785326U (en) * | 2016-06-22 | 2016-12-07 | 深圳华盛创力科技有限公司 | The comprehensive on-line monitoring system of buried cable |
| CN207423397U (en) * | 2017-11-07 | 2018-05-29 | 昆明海立盟电力科技有限公司 | A kind of cable tunnel environment humiture monitoring device |
| CN108956724A (en) * | 2018-09-05 | 2018-12-07 | 江苏久创电气科技有限公司 | It is a kind of for monitoring the intelligent detector of cable tunnel multiple gases |
| CN110715693A (en) * | 2019-09-27 | 2020-01-21 | 杭州电子科技大学 | Hall effect based flow detection sensor and manufacturing and detecting methods thereof |
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| CN111207793A (en) | 2020-05-29 |
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