CN112363203A - Device for monitoring abnormal movement of well lid of electric power tunnel - Google Patents
Device for monitoring abnormal movement of well lid of electric power tunnel Download PDFInfo
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Abstract
The invention discloses a device for monitoring abnormal movement of a well lid of an electric power tunnel, which comprises a working device and a fixing device, wherein the working device comprises: the vibration buffer spring (1) is connected with the manhole cover in a springing manner and is used as a buffer unit to transmit manhole cover abnormal movement signals to the vibration sensor (2); the vibration sensor (2) receives the well lid abnormal movement signal, converts the well lid abnormal movement signal into an analog electric signal and transmits the analog electric signal to the signal encoding processor (3); the signal encoding processor (3) is used for converting the analog electric signal into a digital signal and transmitting the digital signal to the signal wireless transmitter (4); the signal wireless transmitter (4) transmits the digital signal to the background workstation and the mobile phone APP; the fixing device is a fixing plate and a metal wire which are fixed on the side wall of the cable well through hexagon bolts. The invention can master the real-time state of the well lid of the cable tunnel, and solves the behaviors of well lid damage and loss, illegal entering construction of the tunnel, theft of a cable joint grounding wire in the tunnel and the like.
Description
Technical Field
The invention relates to the field of cable operation and maintenance, in particular to a device for monitoring abnormal movement of a well cover of an electric power tunnel.
Background
With the increasing number of high voltage cable lines in urban power grids, cables have gradually become an important component of urban power transmission network frames. The operation and maintenance work of the high-voltage cable is heavy, and the six-prevention work of preventing external damage, fire, water, overheat and harmful gas of the high-voltage cable is the key point of daily operation and maintenance, and the external damage prevention work is more important. When the cable well cover enters the cable tunnel, the cable well cover must be opened, and the abnormal movement condition of the well cover is information which must be mastered by operation and maintenance personnel.
The prior art includes intelligent well lid and card machine. The intelligent well lid belongs to a mode of on-line monitoring, realizes the internal and external sealing of a tunnel by adopting a mechanical structure lock, needs to be opened by utilizing a specific key and equipment, has the functions of remote unlocking, field unlocking, emergency unlocking and the like, can be automatically opened after being authorized, and is widely applied to the aspects of tunnel theft prevention, pipeline management and the like. The intelligent well lid is made of a wide range of materials, can be made of a composite material with high application strength, and is high in intelligence, and part of the well lid supports mobile phone Bluetooth interconnection. The intelligent well lid technology has the disadvantages that the intelligent well lid is heavy, is not easy to open, has high manufacturing cost, needs perfect power supply and communication supporting facilities, and needs professional manufacturer personnel for maintenance in daily maintenance. The phenomenon of opening the well cover by brutal force cannot realize early warning and alarming. To the inside mortise lock of well lid easily receive the damage of soaking, intelligence well lid is applicable to the higher, the shorter cable tunnel of length of fortune dimension level.
The card machine belongs to a mode of control, and it utilizes the monitoring to the tunnel entry of installation card machine realization above the tunnel, and after the card machine monitored that there is artificial or mechanical construction in well lid department, send the photo to fortune dimension personnel's cell-phone, can accurately master the concrete condition near the tunnel. The disadvantage of the card machine technology is that although the photo collection can be carried out on the scene situation, a large number of false alarm photos are easily formed in the area with complex scene situation, and the situation of no photo report exists during night. And the card machine installation needs to be installed in near eminence of tunnel well lid, and partial cable tunnel does not satisfy the installation condition.
Disclosure of Invention
Aiming at the problems, the invention provides a transaction monitoring device which can effectively monitor the time and place when a well lid is opened by external force and is interconnected with a mobile phone APP terminal through wireless transmission; meanwhile, a monitoring threshold value is set, interference of external environmental factors is prevented, the current state of the cable well cover is intelligently judged, help is provided for operation and maintenance personnel to arrive at the site in time, and external damage prevention work is effectively achieved.
In order to achieve the above object, the present invention provides a device for monitoring abnormal operation of a manhole cover of an electric power tunnel, which comprises a working device and a fixing device, wherein the working device comprises: the vibration buffer spring is connected with the manhole cover in a springing manner and serves as a buffer unit to transmit manhole cover abnormal movement signals to the vibration sensor; the vibration sensor receives the well lid abnormal movement signal, converts the well lid abnormal movement signal into an analog electric signal and transmits the analog electric signal to the signal coding processor; the signal coding processor is used for converting the analog electric signal into a digital signal through logic calculation and signal coding and transmitting the digital signal to the signal wireless transmitter; and the signal wireless transmitter transmits the digital signal to the background workstation and the mobile phone APP.
In a preferred mode, the signal coding processor consists of an ADC (analog-to-digital converter) module, a signal coding module and a decoding display module;
the analog electric signal is input to the signal input end of the ADC analog-to-digital conversion module, the four-bit output end of the ADC analog-to-digital conversion module is connected with the input end of the logic judgment module, the output end of the logic judgment module is connected with the input end of the signal coding module, and the output end of the signal coding module is connected with the input end of the signal wireless transmitter.
Preferably, the fixing device is a fixing plate and a metal wire which are fixed on the side wall of the cable well through hexagon bolts;
a clamping groove which is connected with the working device in an inserting manner is formed in the side surface of the fixing plate;
one end of the metal wire is connected with the working device in a winding mode, and the other end of the metal wire is connected with the metal gasket penetrating through the hexagon bolt.
Preferably, the ADC analog-to-digital conversion module includes an ADC analog-to-digital converter U1, and an input terminal Vin of the ADC analog-to-digital converter U1 is connected to the analog electrical signal; the signal coding module comprises a four-bit input OR gate U10A, a four-bit input OR gate U14A, a four-bit input NAND gate U7A, a four-bit input AND gate U1A, a four-bit input AND gate U4A and a four-bit input XOR gate U13A, wherein the output ends D1 and D2 of the ADC analog-to-digital converter U1 are connected with the input end of the four-bit input OR gate U10A, the output end D3 of the ADC analog-to-digital converter U1 and the output end of the four-bit input OR gate U10A are connected with the input end of the four-bit input NAND gate U7A, the output ends U7A and U1 are connected with the input end of the four-bit input XOR gate U13A through the inverted output end of an inverter U16A, the output ends D A and D A of the four-bit input NAND gate U7A are connected with the input end of the four-bit input OR gate U A, the output end of the ADC analog-to the output end D A and the four, the output end D2 of the ADC analog-to-digital converter U1 and the output end of a four-bit input OR gate U14A are connected with the input end of a four-bit input AND gate U4A; the decoding display module comprises a decoding driver U5 and decoding displays U11 and U3, an output end D0 of the ADC analog-to-digital converter U1 is connected with an input end A of a decoding driver U5, an output end of the four-bit input exclusive-OR gate U13A is connected with an input end B of a decoding driver U5, an output end of the four-bit input and gate U4A is connected with an input end C of a decoding driver U5, an output end of the four-bit input and gate U1A is connected with an input end D of a decoding driver U5, and an output end of the decoding driver U5 is connected with input ends of the decoding displays U11 and U3.
The invention has the beneficial effects that: the real-time state of the well lid of the cable tunnel can be mastered, and the behaviors of damage and loss of the well lid, illegal entering construction of the tunnel, theft of a cable joint grounding wire in the tunnel and the like are solved; the occurrence of a large power failure accident is prevented; according to the abnormal condition analysis of the monitoring well lid, the field condition is accurately known.
Drawings
FIG. 1 is a schematic structural view of a device for monitoring abnormal movement of a well lid of an electric power tunnel;
FIG. 2 is a circuit diagram of a signal encoding processor;
FIG. 3 is a schematic view of a vibration sensor;
FIG. 4 is a table of vibration sensor parameters;
FIG. 5 is a non-trigger state diagram of a monitoring electric power tunnel well lid transaction device;
FIG. 6 is a diagram of a trigger state of a device for monitoring abnormal movement of a manhole cover of an electric power tunnel;
FIG. 7 is a table of signal wireless sensor parameters;
FIG. 8 is a schematic diagram of a fixing plate structure in the fixing device;
FIG. 9 is a schematic view of the working device and the fixing device;
fig. 10 is a schematic view of the connection between the metal wire and the bolt in the fixing device.
Detailed Description
Example (b):
as shown in fig. 1, the device for monitoring abnormal movement of the well lid of the electric power tunnel comprises a working device and a fixing device, wherein the working device comprises: the vibration buffer spring 1 is connected with the manhole cover in a springing manner and serves as a buffer unit to transmit manhole cover abnormal movement signals to the vibration sensor 2; the vibration sensor 2 receives the well lid abnormal movement signal, converts the well lid abnormal movement signal into an analog electric signal and transmits the analog electric signal to the signal encoding processor 3; the signal encoding processor 3 is used for converting the analog electric signal into a digital signal through logic calculation and signal encoding and transmitting the digital signal to the signal wireless transmitter 4; and the signal wireless transmitter 4 transmits the digital signal to the background workstation and the mobile phone APP.
As shown in fig. 2, the signal encoding process 3 includes an ADC analog-to-digital conversion module, as shown by a in fig. 2, a signal encoding module, as shown by b in fig. 2, and a decoding display module, as shown by c in fig. 2; the analog electric signal is input to the signal input end of the ADC analog-to-digital conversion module, the four-bit output end of the ADC analog-to-digital conversion module is connected with the input end of the signal coding module, and the output end of the signal coding module is connected with the input end of the signal wireless transmitter 4.
As shown in fig. 8, the fixing device is a fixing plate and a metal wire fixed on the side wall of the cable well through a hexagon bolt; a clamping groove which is connected with the working device in an inserting manner is formed in the side surface of the fixing plate; as shown in fig. 9 and 10, one end of the metal wire is connected to the working device in a winding manner, and the other end of the metal wire is connected to the metal gasket penetrating through the hexagon bolt.
As shown in fig. 2, the ADC analog-to-digital conversion module includes an ADC analog-to-digital converter U1, and an input terminal Vin of the ADC analog-to-digital converter U1 is connected to an analog electrical signal; the signal coding module comprises a four-bit input OR gate U10A, a four-bit input OR gate U14A, a four-bit input NAND gate U7A, a four-bit input AND gate U1A, a four-bit input AND gate U4A and a four-bit input XOR gate U13A, wherein the output ends D1 and D2 of the ADC analog-to-digital converter U1 are connected with the input end of the four-bit input OR gate U10A, the output end D3 of the ADC analog-to-digital converter U1 and the output end of the four-bit input OR gate U10A are connected with the input end of the four-bit input NAND gate U7A, the output ends U7A and U1 are connected with the input end of the four-bit input XOR gate U13A through the inverted output end of an inverter U16A, the output ends D A and D A of the four-bit input NAND gate U7A are connected with the input end of the four-bit input OR gate U A, the output end of the ADC analog-to the output end D A and the four, the output end D2 of the ADC analog-to-digital converter U1 and the output end of a four-bit input OR gate U14A are connected with the input end of a four-bit input AND gate U4A; the decoding display module comprises a decoding driver U5 and decoding displays U11 and U3, an output end D0 of the ADC analog-to-digital converter U1 is connected with an input end A of a decoding driver U5, an output end of the four-bit input exclusive-OR gate U13A is connected with an input end B of a decoding driver U5, an output end of the four-bit input and gate U4A is connected with an input end C of a decoding driver U5, an output end of the four-bit input and gate U1A is connected with an input end D of a decoding driver U5, and an output end of the decoding driver U5 is connected with input ends of the decoding displays U11 and U3.
The device uses the online real-time monitoring mode, utilizes wireless network centralized monitoring, centralized management, and every well lid transaction monitoring device is encoded to the system, gathers well lid opening signal back, uploads to monitor terminal through the transmission signal device in the pipeline, and monitor terminal confirms the open or closed state of well lid according to instrument code and switching signal, makes power cable tunnel management move towards the standard. And judging the opening and closing states of the well lid by using a switch displacement detection principle. When the well lid is unauthorized to be opened, the alarm signal of the detector is triggered, the alarm signal and the code are transmitted to the background through the transmitter after being processed by the signal coding processor, and the alarm signal and the code are transmitted to the mobile phone APP through the background, so that the mobile phone APP has the functions of monitoring a cable well lid switch, positioning the position, monitoring the time, transmitting the time and the like.
This technique is through each item state transform when analysis well lid abnormal movement, and sound sensor, light sensor, vibration sensor are elected in preliminary design, are regarded as the state monitoring unit, select vibration sensor as the monitoring unit through the simulation of tunnel internal and external environment, and the monitoring of abnormal movement is realized to pressure transform when receiving external force to destroy through monitoring well lid inboard. The vibration sensor has the following advantages: the vibration sensor has the advantages of strong reliability, wide selectable range, simple principle, firm structure and strong sensing capability on the pressure state, and can accurately reflect the abnormal movement condition of the well cover; the accuracy is high, according to a field simulation experiment, the vibration sensor has a monitoring error phenomenon different from other sensors, and the pressure transformation can be accurately monitored under a severe underground environment; the sensitivity is high, and as long as the vibration changes beyond the threshold value, the transmission signal can pass through, and the detection is easy. The micro-vibration measurement can be carried out, the use is safe, and the service life is long.
The wireless communication module is responsible for communicating with other nodes, exchanging control information and receiving, transmitting and collecting data, wherein the energy of wireless communication loss is the largest, and the whole low power consumption is related to the whole situation by designing the module. The modulation mode, data rate, transmission power, etc. used by the wireless communication mode are all key factors that affect the communication energy consumption. And the wireless communication module is the unit with the largest energy consumption in the whole network system, and in order to ensure that the sensor network has more durable network life under the condition of limited battery energy, the wireless communication module should select a chip with low power consumption and multiple power consumption modes. The design selects a CC2500 radio frequency chip as a communication unit. The chip is a SmartRF 04 series low-cost, low-power consumption and high-performance single-chip radio frequency transceiver of Chipcon company, and the working frequency is a 2.4GHz ISM frequency band which does not need application and permission to use. The working voltage is low, and a 1.8-3.6V power supply is adopted for supplying power; low current consumption, 0dBm output, reception current RX: 14.3mA, transmission current TX: 21.8 mA; the communication rate can reach 500 Kbps; the sensitivity is high, the sensitivity reaches-101 dBm when the data rate is lOkbps, and the error rate is 1 percent; the output power is adjustable, and the anti-interference capability is extremely strong; the method has complete information packet processing functions including preamble generation, synchronous word insertion/detection, address detection, flexible information packet length and automatic CRC (cyclic redundancy check) check; the chip carrier sensing indicator lamp and the digital RSSI output are provided, so that the quality of a wireless link is improved; the channel clear assessment function CCA makes it suitable for carrier sense LBT systems. The CC2500 wireless transceiver module communicates with the MCU through a standard 4-wire SPI interface, the communication comprises CS, SCLK, SI and SO, and the antenna adopts a PCB microstrip antenna, SO that the structure is small and compact.
In a wireless sensor network formed by the CC2500, a CSMA-CA mechanism is adopted to control the access of a sensor network node to a shared channel. When the MAC protocol receives the message of the upper layer protocol and the ready data is sent out, the protocol function is utilized to be encapsulated into a data frame, then the idle detection of the channel is carried out, if the channel is idle, the data is transmitted by sending a command, otherwise, the channel using condition is judged again by randomly delaying a period of time, and if the busy times of the channel are detected to exceed the set value, the failure of the sending is declared. The CC2500 performs CCA by detecting energy, and supports automatic address identification and CRC check functions.
Vibration buffer spring's design is an indirect response to vibration detector, because cable well lid is cement and metal product mostly, can suffer great impact force when receiving external force to open, in order to protect detector life, this design uses vibration buffer spring, and spring outside parcel PVC anticollision, waterproof material prevent to arouse inside soaking because of the rainy period water level risees simultaneously.
The vibration in the state quantity when the equipment monitors and selects the abnormal well cover movement is taken as the monitoring state, as shown in figure 3, the vibration sensor is the core component of the vibration detector, the vibration sensor can convert vibration signals caused by various reasons into analog electric signals, and the signals are processed by a proper signal processing circuit and then converted into electric signals acceptable for a background. When the induced vibration signal exceeds a certain intensity, an alarm can be set off, and the parameters of the vibration detector are shown in the following figure 4.
And determining the average weight of the electric well lid by using a data simulation program according to the type of the statistical electric well lid, calculating impact pressure according to gravity distribution and the like, and determining a vibration force threshold. According to the situation of occurrence in the field, the design device monitors the alarm state, wherein the alarm signal is directly transmitted for the situation that the vibration threshold value is exceeded and the situation that the vibration threshold value is not exceeded and the vibration frequency is high.
The signal coding processor transmits the electric signal and the code output by the sensor to a background system through a wireless transmission device, and sets a signal transmission period in a background workstation for a cable line to easily generate an external force damage area, and the accessible mobile phone APP terminal accurately monitors the cable line and monitors the cable line in a polling period to monitor the abnormal change of the well lid for a long time and automatically generate historical change data.
When the system is needed, the opening records of a specified well lid in different time periods can be read from the database, and the records are automatically combined into the database. Monitoring the abnormal movement of the well lid in the database to reflect the internal condition of the high-voltage cable of the tunnel in real time, and reflecting the running condition of the high-voltage cable through the times of the alarm signal. The well lid triggering conditions are shown in fig. 5 and 6.
The embedded module in the signal wireless transmitter is DATA-6102 series, provides a DATA transmission channel for the monitoring application of the remote device, and can adopt the GPRS network provided by China Mobile communication company to transmit DATA, and also can adopt the short message mode to transmit DATA. The GPRS channel or the short message channel can be selected according to different conditions and can be switched at any time, and the parameters of the signal wireless transmitter are shown in the following figure 4.
The device is hung on the wall of a well of a cable shaft, the wall of the well is poured concrete, and when the well lid is illegally opened, the well lid is subjected to larger impact force. In order to prevent the device from falling off after being impacted, a metal wire is connected with the device, one end of the metal wire is connected with the back of the bolt through a metal gasket, and the other end of the metal wire is connected with the device, and specific design drawings are shown in fig. 9 and 10.
Monitoring well lid transaction device is through backstage information processing, accessible cell-phone APP inquiry well lid current monitoring and historical data, knows tunnel and cable body running condition in advance, to having the frequent regional key manual work detection of transaction.
The invention has the advantages that: the alarm function on the manhole cover monitoring transaction device can effectively prevent power failure accidents caused by external force damage of the power cable tunnel, and the passive rush-repair is changed into active maintenance, so that the labor cost of daily operation and maintenance is saved, and the lean management of the cable is facilitated; through cell-phone APP terminal, the operation and maintenance personnel can look over cable tunnel well lid abnormal change condition and abnormal change monitoring data at the customer end at any time, help differentiating the outer broken high incidence section of cable, utilize alarm signal frequency in the cycle, formulate reasonable efficient and patrol and examine the plan.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be able to cover the technical solutions and the inventive concepts of the present invention within the technical scope of the present invention.
Claims (4)
1. The utility model provides a monitoring electric power tunnel well lid transaction device, includes equipment and fixing device, its characterized in that, equipment includes: the vibration buffer spring (1) is connected with the manhole cover in a springing manner and is used as a buffer unit to transmit manhole cover abnormal movement signals to the vibration sensor (2); the vibration sensor (2) receives the well lid abnormal movement signal, converts the well lid abnormal movement signal into an analog electric signal and transmits the analog electric signal to the signal encoding processor (3); the signal encoding processor (3) is used for converting the analog electric signals into digital signals through logic calculation and signal encoding and transmitting the digital signals to the signal wireless transmitter (4); the signal wireless transmitter (4) transmits the digital signal to the background workstation and the mobile phone APP.
2. The device for monitoring the abnormal movement of the well lid of the electric power tunnel according to the claim 1, wherein the signal coding processor (3) is composed of an ADC (analog-to-digital converter) module, a signal coding module and a decoding display module;
the analog electric signal is input to the signal input end of the ADC analog-to-digital conversion module, the four-bit output end of the ADC analog-to-digital conversion module is connected with the input end of the signal coding module, and the output end of the signal coding module is connected with the input end of the signal wireless transmitter (4).
3. The device for monitoring the abnormal movement of the well lid of the electric power tunnel according to claim 1, wherein the fixing device is a fixing plate and a metal wire which are fixed on the side wall of the cable well through hexagon bolts;
a clamping groove which is connected with the working device in an inserting manner is formed in the side surface of the fixing plate;
one end of the metal wire is connected with the working device in a winding mode, and the other end of the metal wire is connected with the metal gasket penetrating through the hexagon bolt.
4. The device for monitoring the manhole cover transaction of the electric tunnel according to the claims 1 and 2, wherein the ADC analog-to-digital conversion module comprises an ADC analog-to-digital converter U1, and an input terminal Vin of the ADC analog-to-digital converter U1 is connected with an analog electric signal; the signal coding module comprises a four-bit input OR gate U10A, a four-bit input OR gate U14A, a four-bit input NAND gate U7A, a four-bit input AND gate U1A, a four-bit input AND gate U4A and a four-bit input XOR gate U13A, wherein the output ends D1 and D2 of the ADC analog-to-digital converter U1 are connected with the input end of the four-bit input OR gate U10A, the output end D3 of the ADC analog-to-digital converter U1 and the output end of the four-bit input OR gate U10A are connected with the input end of the four-bit input NAND gate U7A, the output ends U7A and U1 are connected with the input end of the four-bit input XOR gate U13A through the inverted output end of an inverter U16A, the output ends D A and D A of the four-bit input NAND gate U7A are connected with the input end of the four-bit input OR gate U A, the output end of the ADC analog-to the output end D A and the four, the output end D2 of the ADC analog-to-digital converter U1 and the output end of a four-bit input OR gate U14A are connected with the input end of a four-bit input AND gate U4A; the decoding display module comprises a decoding driver U5 and decoding displays U11 and U3, an output end D0 of the ADC analog-to-digital converter U1 is connected with an input end A of a decoding driver U5, an output end of the four-bit input exclusive-OR gate U13A is connected with an input end B of a decoding driver U5, an output end of the four-bit input and gate U4A is connected with an input end C of a decoding driver U5, an output end of the four-bit input and gate U1A is connected with an input end D of a decoding driver U5, and an output end of the decoding driver U5 is connected with input ends of the decoding displays U11 and U3.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113091880A (en) * | 2021-04-13 | 2021-07-09 | 王世波 | Manhole well cover monitoring device and method based on optical fiber sensing technology |
| CN113109591A (en) * | 2021-03-26 | 2021-07-13 | 浙江网新帮德信息服务有限公司 | Well lid looseness detection method and device and storage medium |
| CN113295355A (en) * | 2021-04-15 | 2021-08-24 | 广西电网有限责任公司南宁供电局 | Ground cable channel monitoring device with abnormal vibration early warning function |
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| CN113109591A (en) * | 2021-03-26 | 2021-07-13 | 浙江网新帮德信息服务有限公司 | Well lid looseness detection method and device and storage medium |
| CN113109591B (en) * | 2021-03-26 | 2024-01-23 | 浙江网新帮德信息服务有限公司 | Well lid looseness detection method, well lid looseness detection device and storage medium |
| CN113091880A (en) * | 2021-04-13 | 2021-07-09 | 王世波 | Manhole well cover monitoring device and method based on optical fiber sensing technology |
| CN113295355A (en) * | 2021-04-15 | 2021-08-24 | 广西电网有限责任公司南宁供电局 | Ground cable channel monitoring device with abnormal vibration early warning function |
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Application publication date: 20210212 |