CN212515020U - Cable sag monitoring device based on laser ranging technology - Google Patents
Cable sag monitoring device based on laser ranging technology Download PDFInfo
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Abstract
The utility model discloses a cable sag monitoring devices based on laser rangefinder technique, include: the system comprises an MCU main control module, a solar power supply module, a laser ranging module and a wireless transmission module; the solar power supply module consists of a solar panel, a storage battery, a control chip, an inverter and a load; the laser ranging module consists of a laser telescope, a ranging chip and an RS485 communication interface; the wireless transmission module consists of an internet of things BC95 module chip, a USIM card and a communication antenna. The utility model discloses can be in real time, monitor cable operating condition accurately normally whether, overcome the inaccurate difficulty in transmission line state monitoring and location effectively to promote the efficiency of electric power fortune dimension maintenance operation, and maintain the stability of electric wire netting operation.
Description
Technical Field
The utility model belongs to the technical field of high tension electricity transmission line monitoring, in particular to be used for monitoring whether the cable takes place the sag phenomenon to the system hardware device of early warning suggestion in time.
Background
In recent years, with the development of town integration, the demand of people for electricity for production and life is increasing day by day. Therefore, on the side of power transmission and distribution of the power system, the reasonable arrangement and stable operation of the cable lines are important factors for the integral operation of the left and right power grids. In order to maintain normal operation of power transmission work, the state of a cable is monitored in real time, the sag degree of the cable is judged to serve as an important index for measuring the safety of a line, then a fault line is accurately positioned, and power inspection personnel are arranged to repair the line in time.
The traditional monitoring means mainly comprise a different-length method, a gear end observation method and the like, and essentially determine field parameters such as sag height and the like in an artificial power inspection mode. However, in an actual scene, the environment where the line is located is complex, the span of the geographic landscape is large, if a manual on-site inspection mode is adopted, the difficulty and risk of monitoring are increased, a large amount of manpower and material resources are consumed, the efficiency of timely processing the cable fault is reduced, and therefore the unstable factor of the operation of the power grid line is increased.
Disclosure of Invention
The utility model relates to a solve the weak point that above-mentioned prior art exists, provide a cable sag monitoring devices based on laser rangefinder technique to can be in real time, monitor cable operating condition accurately normally or not, overcome the inaccurate difficulty in transmission line state monitoring and location effectively, thereby promote the efficiency that electric power fortune dimension overhauld the operation, and maintain the stability of electric wire netting operation.
The utility model discloses in order to reach above-mentioned invention purpose, adopt following technical scheme:
the utility model relates to a cable sag monitoring devices's characteristics based on laser rangefinder technique include: the system comprises an MCU main control module, a solar power supply module, a laser ranging module and a wireless transmission module;
the solar power supply module consists of a solar panel, a storage battery, a control chip, an inverter and a load;
the laser ranging module consists of a laser telescope, a ranging chip and an RS485 communication interface;
the wireless transmission module consists of an internet of things BC95 module chip, a USIM card and a communication antenna;
the laser telescope is fixed on the electric power tower in a mode of being parallel to the power transmission line, and the laser telescope is connected with the distance measuring chip through the RS485 communication interface;
the distance measurement chip is connected with the MCU main control module and used for transmitting distance measurement information;
the MCU main control module is connected with the Internet of things BC95 module chip; the USIM card is inserted into a card slot below the internet of things BC95 module chip; the communication antenna is inserted into the jack of the MCU main control module;
the solar panel is connected with positive and negative pins of a power supply of the MCU master control module and is connected with the positive and negative electrodes of the storage battery in parallel; the storage battery is connected with the inverter and supplies power to the load;
and the control chip is connected with the MCU main control module and used for supplying the processed voltage signal to the MCU main control module for conversion processing and then supplying power to an AC/DC load.
The cable sag monitoring device based on the laser ranging technology is also characterized in that,
the MCU main control module consists of a stm32f103rct6 type single chip microcomputer and peripheral circuits thereof.
The connection relation between the control chip and the MCU master control module is as follows:
the EINT external interrupt pin of the control chip is connected with the PC8/TIM3_ CH3 of the singlechip and is used for acquiring the interrupt signal of the singlechip and controlling the period and the frequency of an input voltage signal;
the RXD pin and the TXD pin of the control chip are respectively connected with the PA2/UART2_ TX pin and the PA3/UART2_ RX pin of the single chip microcomputer and used for transmitting processed voltage signals.
The connection relation between the ranging chip and the MCU main control module is as follows:
the INT external interrupt pin of the ranging chip is connected with a TIM 3-CH 1 pin of the singlechip and is used for receiving an interrupt signal of the singlechip and adjusting the emission frequency of a laser signal;
the EN enabling port of the ranging chip is connected with a PC9/TIM3_ CH4 pin of the single chip microcomputer and used for controlling the working state of the ranging chip;
the SCL clock pin and the SDA data pin chip of the ranging chip are respectively connected with the PB8/IIC _ SCL pin and the PB9/IIC _ SDA pin of the single chip, and are respectively used for receiving clock signal control of the single chip, adjusting monitoring time sequence for obtaining ranging data and transmitting real-time ranging information.
The connection relation between the MCU main control module and the Internet of things BC95 module chip is as follows:
the RESET pin of the internet of things BC95 module chip is connected with the NRST pin of the single chip microcomputer and used for clearing and restarting data;
an RI output ringing pin of the BC95 module chip of the Internet of things is connected with a PC7/TIM3_ CH2 pin of the singlechip and is used for outputting ringing tone to perform early warning prompt;
the RXD serial input pin and the TXD serial output pin of the BC95 module chip of the Internet of things are respectively connected with a PB10/UART3_ TX pin and a PB11/UART3_ RX pin of the single chip microcomputer and used for transmitting ranging data.
Compared with the prior art, the beneficial effects of the utility model reside in that:
1. the cable sag monitoring device is arranged on the electric power tower, can judge whether the cable sags or not by emitting laser beams, and can be reused at any time, thereby effectively saving the cost of hardware investment;
2. the utility model adopts the solar energy and battery dual power supply mode, realizes the all-weather continuous power supply to the monitoring device, and improves the monitoring efficiency of the cable state;
3. the utility model discloses the device has integrateed laser rangefinder module and thing networking BC95 module, accomplishes the wireless transmission to cable real-time status's monitoring and information, and it is big to implement the degree of difficulty in the fine solution artifical electric power inspection mode, detects the low scheduling problem of precision, turns into simple and convenient automation mechanized operation with dangerous manual work. Meanwhile, on-site monitoring and early warning information can be synchronized to a background system management end, visual display and analysis of data are achieved, the intelligent degree of power inspection operation is further improved, and scientific and effective data support is provided for final decision making of managers.
Drawings
FIG. 1 is a schematic diagram of the system connection of the apparatus of the present invention;
FIG. 2 is a connection diagram of the solar power module and the MCU of the device of the present invention;
FIG. 3 is a connection diagram of the wireless communication module and the MCU of the device of the present invention;
fig. 4 is the connection diagram of the laser ranging module and the MCU of the device of the present invention.
Detailed Description
In this embodiment, a cable sag monitoring device based on laser rangefinder technique is with laser rangefinder technique and wireless communication technique as the support, connect gradually the inside function module of device and with the wireless butt joint of backstage center to form a neotype hardware equipment connection structure and mode, and constitute the system's device of integration, can accomplish the real-time supervision to the cable run state, and accomplish image snapshot and real-time early warning when it takes place the sag phenomenon, realize the purpose to the automatic monitoring of electric wire netting cable and fortune dimension. Specifically, as shown in fig. 1, the apparatus mainly includes: the system comprises an MCU main control module, a solar power supply module, a laser ranging module and a wireless transmission module; the formed hardware device is used for monitoring whether the cable has abnormal phenomena such as sag deformation and the like.
The MCU main control module consists of a stm32f103rct6 type single chip microcomputer and peripheral circuits thereof, is a control and calculation center of the whole system device, and mainly realizes the functions of issuing control instructions and transmitting and processing ranging information.
The solar power supply module consists of a solar panel, a storage battery, a control chip, an inverter and a load;
the laser ranging module consists of a laser telescope, a ranging chip and an RS485 communication interface;
the wireless transmission module consists of an internet of things BC95 module chip, a USIM card and a communication antenna;
fixing a laser telescope on an electric power tower in a manner of being parallel to a power transmission line so as to transmit and receive infrared beams; the laser telescope is in a rectangular box shape, and the size of the laser telescope is 104mm multiplied by 113mm multiplied by 51 mm; a data transmission line is led out from an RS485 communication interface at the rear end of the laser telescope and connected with the ranging chip;
as shown in fig. 4, the ranging chip is connected to the MCU main control module, and is configured to transmit ranging information to the single chip for processing, so as to implement communication with the single chip; specifically, the connection relationship between the ranging chip and the MCU main control module is as follows:
an INT external interrupt pin of the ranging chip is connected with a TIM3_ CH1 pin of the singlechip and is used for receiving an interrupt signal of the singlechip and adjusting the emission frequency of a laser signal; the frequency of the distance measurement work is adjusted, and unnecessary work energy consumption of the device is reduced;
the EN enabling port of the ranging chip is connected with a PC9/TIM3_ CH4 pin of the single chip microcomputer and used for controlling the working state of the ranging chip; if the output pulse signal is in a high level, enabling the chip to start working, and if the output pulse signal is in a low level, enabling the chip to be in a static sleep mode and suspending working;
the SCL clock pin and the SDA data pin chip of the ranging chip are respectively connected with the PB8/IIC _ SCL pin and the PB9/IIC _ SDA pin of the single chip, and are respectively used for receiving clock signal control of the single chip, adjusting monitoring time sequence for obtaining ranging data and transmitting real-time ranging information to the MCU main control module for further processing.
The wireless transmission module is characterized in that a high-performance and low-power-consumption internet-of-things communication chip BC95 module is used as a core, the chip has a compact size, ultra-low power consumption and an ultra-wide working temperature range, two serial port pins of the internet-of-things BC95 module chip are respectively connected with a serial port of a single chip microcomputer of an MCU main control module, uploading of collected information and issuing of a control instruction are completed, and the wireless transmission module is a key module for realizing communication butt joint of a monitoring terminal and a background center. Specifically, as shown in fig. 3, the connection relationship between the MCU main control module and the internet of things BC95 module chip is as follows:
the RESET pin of the BC95 module chip of the Internet of things is connected with the NRST pin of the singlechip and is used for receiving the RESET signal of the singlechip, clearing data and restarting the data;
an RI output ringing pin of the BC95 module chip of the Internet of things is connected with a PC7/TIM3_ CH2 pin of the singlechip and is used for controlling output ringing tone to carry out early warning prompt;
the RXD serial input pin and the TXD serial output pin of the BC95 module chip of the Internet of things are respectively connected with the PB10/UART3_ TX pin and the PB11/UART3_ RX pin of the single chip microcomputer, the functions of outputting ranging data by the serial port of the MCU main control module and butting with the wireless communication module are achieved, and then the ranging data are uploaded to a background management center through a wireless network to be processed.
The USIM card is inserted into a card slot below the internet of things BC95 module chip; one end of the communication antenna plug is arranged in a jack of the MCU main control module; the other end points upwards, and sends a 4G signal to the network to complete wireless connection.
The solar panel is arranged outside the device, is fixed in a direction of inclining towards south by 30-45 degrees, leads out two leads which are respectively connected with positive and negative pins of a power supply of the MCU main control module and are connected with the positive and negative electrodes of the storage battery in parallel to charge the storage battery; two lines led out from the positive electrode and the negative electrode of the storage battery are connected with the inverter and are converted into alternating current to supply power to the load; or directly outputting direct current voltage from the MCU master control module to supply power to the direct current load 4 e. The solar panel can convert the received solar energy into electric energy and then supply power to other hardware modules. The storage battery can be indirectly charged, and when the weather is rainy, the storage battery supplies power to each module. The solar power supply module supplies 12V direct current voltage to the laser ranging module, supplies 3.3V direct current voltage to the single chip microcomputer of the MCU module, and supplies 3.8V direct current voltage to the wireless transmission module.
The control chip is connected with the MCU main control module and used for providing the processed voltage signal to the MCU main control module for conversion processing and then supplying power to the AC/DC load. Specifically, the connection relationship between the control chip and the MCU main control module is as follows:
an EINT external interrupt pin of the control chip is connected with a PC8/TIM3_ CH3 of the singlechip and is used for acquiring an interrupt signal provided by the singlechip timer and controlling the period and the frequency of an input voltage signal;
as shown in fig. 2, the RXD pin and the TXD pin of the control chip are respectively connected with the PA2/UART2_ TX pin and the PA3/UART2_ RX pin of the single chip, and are used for transmitting the input voltage signal to the MCU main control module for further conversion processing after being processed by the chip, and then supplying power to the ac/dc load.
The working process of the device is approximate, firstly, when the optical cable is normal or bent but the sag does not reach the early warning value, the laser emitted by the laser telescope is reflected by the reflector and then received by the laser telescope, so that the distance between the two power towers is calculated for recording and reference; when the sag of the optical cable after deformation reaches an early warning value, the baffle plate on the optical cable can shield the laser beam emitted by the laser telescope, so that the laser beam is reflected back into the laser telescope in advance. At the moment, the reflecting distance calculated by the laser telescope can be obviously reduced, and the cable A can be judged to sag too much. Meanwhile, after the ranging information is transmitted to the background center in real time, managers position specific fault points according to the actually measured and calculated reflection distance and arrange electric power operators to attend to the site for maintenance in time.
Claims (5)
1. The utility model provides a cable sag monitoring devices based on laser rangefinder technique, characterized by includes: the system comprises an MCU main control module, a solar power supply module, a laser ranging module and a wireless transmission module;
the solar power supply module consists of a solar panel, a storage battery, a control chip, an inverter and a load;
the laser ranging module consists of a laser telescope, a ranging chip and an RS485 communication interface;
the wireless transmission module consists of an internet of things BC95 module chip, a USIM card and a communication antenna;
the laser telescope is fixed on the electric power tower in a mode of being parallel to the power transmission line, and the laser telescope is connected with the distance measuring chip through the RS485 communication interface;
the distance measurement chip is connected with the MCU main control module and used for transmitting distance measurement information;
the MCU main control module is connected with the Internet of things BC95 module chip; the USIM card is inserted into a card slot below the internet of things BC95 module chip; the communication antenna is inserted into the jack of the MCU main control module;
the solar panel is connected with positive and negative pins of a power supply of the MCU master control module and is connected with the positive and negative electrodes of the storage battery in parallel; the storage battery is connected with the inverter and supplies power to the load;
and the control chip is connected with the MCU main control module and used for supplying the processed voltage signal to the MCU main control module for conversion processing and then supplying power to an AC/DC load.
2. The cable sag monitoring device based on the laser ranging technology as claimed in claim 1, wherein: the MCU main control module consists of a stm32f103rct6 type single chip microcomputer and peripheral circuits thereof.
3. The cable sag monitoring device based on the laser ranging technology as claimed in claim 2, wherein the connection relationship between the control chip and the MCU main control module is as follows:
the EINT external interrupt pin of the control chip is connected with the PC8/TIM3_ CH3 of the singlechip and is used for acquiring the interrupt signal of the singlechip and controlling the period and the frequency of an input voltage signal;
the RXD pin and the TXD pin of the control chip are respectively connected with the PA2/UART2_ TX pin and the PA3/UART2_ RX pin of the single chip microcomputer and used for transmitting processed voltage signals.
4. The cable sag monitoring device based on the laser ranging technology as claimed in claim 2, wherein the connection relationship between the ranging chip and the MCU main control module is as follows:
the INT external interrupt pin of the ranging chip is connected with a TIM 3-CH 1 pin of the singlechip and is used for receiving an interrupt signal of the singlechip and adjusting the emission frequency of a laser signal;
the EN enabling port of the ranging chip is connected with a PC9/TIM3_ CH4 pin of the single chip microcomputer and used for controlling the working state of the ranging chip;
the SCL clock pin and the SDA data pin chip of the ranging chip are respectively connected with the PB8/IIC _ SCL pin and the PB9/IIC _ SDA pin of the single chip, and are respectively used for receiving clock signal control of the single chip, adjusting monitoring time sequence for obtaining ranging data and transmitting real-time ranging information.
5. The cable sag monitoring device based on the laser ranging technology as claimed in claim 2, wherein the connection relationship between the MCU main control module and the Internet of things BC95 module chip is as follows:
the RESET pin of the internet of things BC95 module chip is connected with the NRST pin of the single chip microcomputer and used for clearing and restarting data;
an RI output ringing pin of the BC95 module chip of the Internet of things is connected with a PC7/TIM3_ CH2 pin of the singlechip and is used for outputting ringing tone to perform early warning prompt;
the RXD serial input pin and the TXD serial output pin of the BC95 module chip of the Internet of things are respectively connected with a PB10/UART3_ TX pin and a PB11/UART3_ RX pin of the single chip microcomputer and used for transmitting ranging data.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113432580A (en) * | 2021-06-22 | 2021-09-24 | 国网天津市电力公司 | Sag early warning projection device and detection method for communication ADSS optical cable |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113432580A (en) * | 2021-06-22 | 2021-09-24 | 国网天津市电力公司 | Sag early warning projection device and detection method for communication ADSS optical cable |
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