CN216002285U

CN216002285U - Parameter monitoring system of contact net anchoring compensation device

Info

Publication number: CN216002285U
Application number: CN202120160804.3U
Authority: CN
Inventors: 蒋恺; 杨国栋; 雷阳成; 戴龙吉; 唐健琼; 杨洪滨; 刘白剑; 张瑞林; 张雄德; 熊志斌; 曾还尤; 苏光霖; 贲能成; 赵庆北; 冯惠玲; 顾欣
Original assignee: China Railway Nanning Group Co Ltd; Liuzhou Power Supply Section of China Railway Nanning Group Co Ltd; Institute of Science and Technology of China Railway Nanning Group Co Ltd
Current assignee: China Railway Nanning Group Co Ltd; Liuzhou Power Supply Section of China Railway Nanning Group Co Ltd; Institute of Science and Technology of China Railway Nanning Group Co Ltd
Priority date: 2021-01-21
Filing date: 2021-01-21
Publication date: 2022-03-11
Anticipated expiration: 2031-01-21

Abstract

The utility model discloses a parameter monitoring system of a contact net anchoring compensation device, which mainly comprises an upper computer, a lower computer, a server, a solar power supply module and a power management module, wherein the server is respectively connected with the upper computer and the lower computer; the lower computer mainly comprises a single chip microcomputer control module which is respectively connected with and controls the Internet of things module, the distance measuring module, the temperature measuring module and the tension testing module; the lower computer is connected with the server through the Internet of things module; the solar power supply module is connected with the single-chip microcomputer control module and the Internet of things module through the power management module and provides power for the single-chip microcomputer control module and the Internet of things module. The device simple installation, function are perfect, the operation is reliable, economical and practical, and the facilitate promotion, wide application can provide basic data for contact net state overhauls, carries out the early warning to the trouble problem simultaneously, in time informs staff trouble place and fault type, prevents to take place bigger accident.

Description

Parameter monitoring system of contact net anchoring compensation device

Technical Field

The utility model belongs to the technical field of electrified railway contact net monitoring devices, and particularly relates to a parameter monitoring system of a contact net anchoring compensation device.

Background

The contact net compensation device is an important device for improving the pantograph-catenary current collection condition in the running process of an electric locomotive and improving the running quality of the contact net of the electrified railway. According to the regulation of maintenance rules for operation of overhead contact systems of high-speed railways (total iron movement (2015) 362), equipment management units need to detect parameters of the anchor dropping compensation device periodically (3-year period). At present, the staff of regular teams and groups is regularly organized to use a ruler (tape measure or tape measure) to carry out the measurement work, so that more skylights and more manpower are occupied, the measurement data interruption time is long, the stretching of a thread is greatly influenced by the temperature, the stretching rule of the thread can not be mastered through the change of parameters of the anchoring compensation device, and the potential wire breakage hazard caused by the abnormity of the suspension tension of a contact network is difficult to find in time.

The contact network is used as a more important part in the whole traction power supply system, once the contact network breaks down, the current taking of the train can be directly influenced, the parking and other more serious safety accidents are caused, and the influence on the driving safety of the train is large after the contact network breaks down because the contact network is not standby. Therefore, great attention is paid to monitoring the operation state of the contact network at home and abroad. The existing detection methods basically pass through sensor testing, then carry out remote transmission of data through GPRS or Ethernet, finally upload the data to a data center or a server, and carry out data processing and analysis work through upper computer software or other data processing tools, but all have respective disadvantages and shortcomings. For example:

the American IMPulse company develops a set of system for monitoring the safety state of a contact net, and the system judges whether the contact net has foreign matter invasion or disconnection accidents by monitoring the ambient temperature and the displacement of the contact line in real time. However, after a large amount of use, the system is mainly suitable for a pulley compensation device and needs to be fixed by a compensation pulley, and other compensation methods lack relevant theories as a support, so that the monitoring of other compensation methods cannot be realized.

Tanshan Pengliu, Zhou le et al have proposed a contact net compensation arrangement remote real-time monitoring system based on GPRS. The system periodically collects signals through a temperature and humidity sensor and a displacement sensor at a wireless collection node, and sends the signals to a network server through mobile GPRS data, and a computer completes detection of temperature and displacement by processing Internet signals. However, the input voltage of the system is 220V of power frequency voltage, and the point taking along the field railway is inconvenient, so the installation and the application are limited.

Zhao xiyuan et al have designed contact net compensation arrangement B value on-line monitoring system, accomplish the B value test through installing laser probe, later carry out remote communication through wireless GPRS module, and data show through host computer software, accomplish remote monitoring contact net B value state, but because laser probe cost is higher, the system is not fit for a large amount of investment detections.

Disclosure of Invention

The utility model aims to solve the technical problem of providing a parameter monitoring system of a contact net anchoring compensation device, which is simple and convenient to install, complete in function, reliable in operation, economical and practical, is convenient to popularize, can be widely applied to provide basic data for contact net state maintenance, and can be used for early warning fault problems, timely notifying workers of fault places and fault types and preventing larger accidents from happening.

In order to solve the technical problems, the utility model adopts the following technical scheme:

the parameter monitoring system of the overhead line system anchoring compensation device mainly comprises an upper computer, a lower computer, a server, a solar power supply module and a power management module, wherein the server is respectively connected with the upper computer and the lower computer; the lower computer mainly comprises a single chip microcomputer control module which is respectively connected with and controls the Internet of things module, the distance measuring module, the temperature measuring module and the tension testing module; the lower computer is connected with the server through the Internet of things module; the solar power supply module is connected with the single-chip microcomputer control module and the Internet of things module through the power management module and provides power for the single-chip microcomputer control module and the Internet of things module.

The upper computer is a client.

The tension testing module comprises an analog sensor and a high-precision sensor.

The solar power supply module consists of a solar panel, a storage battery, a power adapter, a support and a connecting wire.

The power management module comprises an enabling switch, a power indicator lamp, a 12V direct current source, a 5V direct current source and a 3.3V direct current source.

The high-precision sensor is a steel wire rope sensor.

Aiming at the practical problems and the field requirements of the existing electrified railway contact net monitoring device, the inventor designs a parameter monitoring system of the contact net anchoring compensation device by combining a single chip microcomputer, a sensor and the technology of the Internet of things, and the parameter monitoring system mainly comprises an upper computer, a lower computer, a server, a solar power supply module and a power supply management module, wherein the server is respectively connected with the upper computer and the lower computer; the lower computer mainly comprises a single chip microcomputer control module which is respectively connected with and controls the Internet of things module, the distance measuring module, the temperature measuring module and the tension testing module; the lower computer is connected with the server through the Internet of things module; the solar power supply module is connected with the single-chip microcomputer control module and the Internet of things module through the power management module and provides power for the single-chip microcomputer control module and the Internet of things module. The device can utilize the NB-IoT internet of things to realize data transmission of the distance from the ground of the falling weight of the contact net, the field temperature and the rope tension, can reduce the number of times of inspection of the lower anchor compensation device, reduce the number of times of skylight of personnel, improve the maintenance quality and ensure that the contact net is in a good working state; secondly, monitoring the change condition of the anchoring compensation device along with the temperature in real time, and grasping the running state can effectively prevent the loosening of a thread caused by the falling of the anchoring compensation device, further prevent the occurrence of a drill bow accident and the abnormal stress of the thread caused by the clamping stagnation of the anchoring compensation device, further cause a thread breakage accident and cause a driving safety accident due to the expansion of defects; in addition, when the B value is out of limit, early warning information is sent to relevant workers, whether the B value accords with an installation curve or not can be checked in a manual mode, hidden dangers can be found and treated in time, and the fault prediction capability is improved.

Drawings

Fig. 1 is a structural diagram of a parameter monitoring system of the overhead line system anchoring compensation device.

FIG. 2 is a schematic diagram of the temperature measurement-DS 18B20 circuit.

Fig. 3 is a schematic diagram of a TFmini Plus type sensor circuit.

Fig. 4 is a schematic diagram of a tension analog sensor.

Fig. 5 is a schematic diagram of tension detection.

Fig. 6 is a schematic diagram of battery voltage sampling.

Fig. 7 is a schematic diagram of the undervoltage protection.

FIG. 8 is a schematic diagram of a system power supply, wherein: 8a is a system power supply principle diagram, and 8b is a tension sensor power supply diagram.

Detailed Description

One, system structure

As shown in fig. 1, the parameter monitoring system of the overhead line system anchoring compensation device mainly comprises an upper computer (client), a lower computer, a server, a solar power supply module and a power management module, wherein the server is respectively connected with the upper computer and the lower computer; the lower computer mainly comprises a single chip microcomputer control module which is respectively connected with and controls the Internet of things module, the distance measuring module, the temperature measuring module and the tension testing module; the lower computer is connected with the server through the Internet of things module; the solar power supply module is connected with the single-chip microcomputer control module and the Internet of things module through the power management module and provides power for the single-chip microcomputer control module and the Internet of things module.

The system module source information is shown in table 1:

TABLE 1 sources of System Components

Second, the working principle

2.1 Single chip microcomputer control module

The single chip microcomputer control module is a core unit and mainly has the following functions: the client sends the control instruction to the Internet of things module through the server, then data are transmitted to the single chip microcomputer control module, the single chip microcomputer receives and analyzes the control instruction sent by the Internet of things module, and meanwhile information (including acquired distance, temperature, tension and storage battery voltage) acquired by the lower computer is transmitted to the Internet of things module in real time; and the data is uploaded to the client through the server, when the B value is out of limit through online monitoring, early warning information is sent to relevant workers, whether the B value accords with an installation curve or not can be checked in a manual mode, hidden troubles are timely found and treated, the fault prediction capability is improved, and the contact net is ensured to be in a good working state.

2.2 Internet of things Module

Currently, the mainstream remote data transmission modes such as 2G, 3G, 4G and NB-Iot are adopted, the current 2G and 3G basically exit the mainstream market, 4G and NB-Iot are used more frequently, the two modes both need to purchase an Internet of things card, and the NB-Iot is finally selected to transmit data in consideration of low power consumption application. To transmit data using NB-IoT terminals, the relevant specifications must be met. Because the project group selects the telecom internet of things card, corresponding configuration needs to be carried out according to the open platform NB-IoT service docking instruction book of China telecom internet of things.

The Internet of things module selects an F2910 Iot Terminal of Xiamen Quxin, and can realize a wireless long-distance data transmission function by utilizing a public network NB-IoT network. The module provides RS232 and RS485 interfaces, and can be directly connected with serial port equipment to realize transparent data transmission; designing low power consumption; 5-channel I/O port is provided, and the functions of digital quantity input/output, analog quantity input, pulse counting and the like can be realized. The F2910 module is inserted into an NB-IoT Internet of things card, and corresponding parameters are configured. The single chip microcomputer control module transmits the acquired data to the F2910 Internet of things module through the RS 232.

2.3 distance measuring module

The TFmini Plus type sensor has the following characteristics: the working temperature is-20-60 ℃, the storage temperature is-20-75 ℃, based on the TOF (time of flight) principle, the distance measuring device can realize the functions of stability, accuracy, high sensitivity and high speed, has low cost, IP65 grade protection, strong adaptability to outdoor strong light, different temperatures, different reflectivities and other different environments, low power consumption, flexible detection frequency and compatibility with UART and I²And C, the communication interface can be switched by an instruction. The circuit schematic diagram is shown in fig. 3.

In order to save cost and reduce power consumption, I can be adopted²And C, the communication interface acquires the distance data. The distance measuring module supports UART and IIC communication by default, and since STM32 only has two UART ports by default, one UART port is used for debugging, and the other UART port is used for communicating with the Internet of things module. Therefore, the communication design with the ranging module can only use IIC communication, STM32 is the main communication, and the ranging module is the slave communication. All data communication is actively initiated by STM32, and the ranging module does not actively report ranging data in IIC mode, and energy saving is achieved.

2.4 temperature measuring module

DS18B20 is a "one-wire bus" interface temperature sensor, introduced by DALLAS semiconductor corporation, with waterproof capability that provides a 9-bit (binary) temperature reading indicating the temperature of the device. Information is fed into DSl8B20 or out of DSl82B0 via a single wire interface, so only one line (and ground) is needed from the host CPU to DSl8B 20. DSl8B20 may be supplied by the data line itself without the need for an external power source. Because each DSl8B20 has been given a unique serial number at the time of factory shipment, any number of DSl8B20 may be stored on the same single-wire bus. This allows the placement of temperature sensitive devices in many different places. DSl820, the measurement range is from-55 deg.C to +125 deg.C, the increment value is 0.5 deg.C, the temperature can be converted into number within 1s (typical value). The circuit schematic diagram is shown in fig. 2.

2.5 tension test module

Considering that the rope cannot be damaged or sheared by the installation of the tension testing module, the steel wire rope sensor is selected, and the tension detection requirement can be met. The specifications and properties are shown in Table 2.

TABLE 2 Steel wire rope sensor technical specification Performance

In addition, considering that the steel wire rope sensor is output in millivolt level, and the change of the output parameter of the tension sensor can be observed only by needing a very large tension in practical use, and the realization mode is very troublesome, the tension testing module also comprises a tension simulation sensor, namely the function of the tension sensor is realized by 4 fixed resistors and an adjustable resistor, the circuit schematic diagram of the tension testing module is shown in the following figure 4, and the output of the steel wire rope sensor is simulated by the adjustable resistor, so that the quality of the sensor and the control board is detected. The tension sensor is formed by a resistor, the resistance of the resistor is changed through the change of the tension, so that a voltage difference signal is generated, the tension value is obtained through conversion, and a circuit diagram of the tension testing module is shown in the following figure 5. The circuit mainly comprises a voltage following circuit and a voltage amplifying circuit, wherein U8-A and U8-B are voltage following circuits, and U1-B is a differential amplifying circuit. Meanwhile, the input voltage of the singlechip is in the range of 0-3.3V through a clamping diode D1, and the singlechip is protected from being damaged.

The tension module uses an ADC onboard STM32, using channel 6 and channel 7 of ADC1 as tension voltage sampling input channels, using a 12-bit mode. After the ADC is started to obtain the sampling voltage, the calculation from the sampling voltage to the actual voltage is completed according to the hardware voltage division design.

2.6 solar power supply module

Considering the variability of the application environment of the system, the system cannot be powered by mains supply, so the design adopts a power supply mode of a solar panel and a storage battery. The solar power supply module consists of a solar panel, a storage battery, a power adapter, a support and a connecting wire.

2.7 Power management Module

The power management module comprises an enabling switch, a power indicator lamp, a 12V direct current source, a 5V direct current source and a 3.3V direct current source, and the technical parameters are shown in a table 3.

TABLE 3 Power management Module technical parameters

Serial number	Parameter name	Parameter range	Accuracy of measurement
				1	12V output voltage range	11.88-12.12V	1％
2	5V output voltage range	4.85-5.15V	3％
				3	3.3V output voltage range	3.2-3.4V	3％

The power management module comprises an input voltage sampling circuit and an input undervoltage protection circuit.

The voltage sampling circuit is mainly used for collecting the voltage of the storage battery, reporting the data of the storage battery to the server and monitoring whether the voltage of the storage battery is normal or not. In winter, the storage battery is not in the sun or is aged after being used for a long time, the storage battery is in a power shortage state, and the storage battery needs to be charged through alternating current or replaced in time, so that normal operation of equipment is guaranteed. The specific circuit is shown in fig. 6.

The schematic diagram of the undervoltage protection circuit is shown in fig. 7. The reference voltage of the AZ431 of the chip is 2.5V, when the voltage of the pin 1 of the AZ431 is greater than 2.5V (namely the VIN voltage is greater than 10.75V), the output of the pin 3 is approximately equal to the low voltage of about 2.5V, the CJ2304 field effect transistor is turned off, and the IO3 is high level, which indicates that the power supply voltage of the storage battery is normal; when the voltage of the pin 1 of the AZ431 is smaller than 2.5V (namely the voltage of VIN is smaller than 10.75V), the output of the pin 3 is approximately equal to the high level of VIN, the CJ2304 field effect transistor is conducted, the IO3 is low level, the storage battery is under-voltage, and the system enters under-voltage protection. An output port of the circuit IO3 is connected to an IO3 port of the F2910 IOT module, and the power supply voltage condition of the storage battery can be judged by acquiring the level of the IO3 port through an instruction.

Among three types of power supplies, 12.0V mainly supplies power to the tension sensor, and since the voltage variation range of the storage battery is wide (10.75V-14V), in order to ensure high accuracy and high reliability of the tension sensor, a DC-DC module is additionally added, so that the power supply of the tension sensor is stabilized at 12.0V, and the voltage accuracy: plus or minus 1 percent. 5.0V mainly supplies power to the ranging module. 3.3V is mainly used for a singlechip control module, a temperature measurement module and the like. The schematic circuit diagram is shown in fig. 8.

The parameter monitoring system of the contact net anchoring compensation device is simple in structure, easy to operate and easy to maintain, and the detection of the distance of the monitoring point, the temperature and the rope tension of the contact net anchoring compensation device is realized remotely. The system provides a visual, convenient and effective management means for power supply personnel, can further improve the working efficiency, improves the fault prediction capability and ensures that the contact network is in a good working state. Meanwhile, related management and technical personnel can monitor the code sending box remotely, and the time for analyzing and processing faults can be shortened. Wherein the content of the first and second substances,

1) the system adopts an STM32F030K6T6 singlechip of ST as a main control chip, collects the distance from the weight to the ground, the field environment temperature, the rope tension value and the storage battery voltage, realizes the integrity and the real-time performance of data transmission and reception through RS232 and IIC serial port communication technologies, and can process and transmit data in real time;

2) narrow-band internet of things (NB-IoT) is adopted to transmit data, and the NB-IoT has four characteristics: the method has the advantages of low cost of the wide-coverage technology, support of cellular data connection of low-power-consumption equipment in a wide area network, support of high-efficiency connection of equipment with long standby time and high requirement on network connection.

3) In view of the variability of the installation position of the contact net compensation device, the commercial power supply cannot be carried out in many places in the field, so the power supply technology of solar energy and storage batteries is adopted, and the storage battery of 12V20AH can continuously work for about 40 days even under the condition of no solar energy power supply through measurement and calculation.

4) In order to save electricity and improve the equipment running time as much as possible, when a client does not send a data acquisition instruction, the front-end device only normally works through the Internet of things module, and cuts off the power supply of the singlechip and the peripheral detection circuit thereof through the control of the Internet of things module to enter a standby state; only when the IOT module receives a data acquisition instruction issued by the client, the IOT module enables the power supply of the single chip microcomputer and the peripheral detection circuit, the data acquired by the single chip microcomputer is sent to the IOT module through the serial port, and the IOT module transmits the data to the server. And after the data acquisition is finished, the system enters a standby state again to ensure the overlong working time of the whole system.

5) In order to prevent the device from being incapable of normally working due to the undervoltage of the storage battery under the standby condition (the voltage data of the storage battery cannot be uploaded under the standby condition), the power management module is provided with a hardware voltage undervoltage acquisition circuit, when the voltage of the storage battery is lower than 10.75V, the Internet of things module receives a storage battery feed signal and transmits the signal to the server through the Internet of things module, and the undervoltage alarm function of the storage battery is realized. The state of the storage battery is monitored in real time, and the voltage of the storage battery is ensured to be in a normal range. When the voltage of the storage battery is higher than 10.75V, the Internet of things module receives a signal that the power supply of the storage battery is normal, and the system can normally work.

Claims

1. A parameter monitoring system of a contact net anchoring compensation device is characterized by mainly comprising an upper computer, a lower computer, a server, a solar power supply module and a power management module, wherein the server is respectively connected with the upper computer and the lower computer; the lower computer mainly comprises a single chip microcomputer control module which is respectively connected with and controls the Internet of things module, the distance measuring module, the temperature measuring module and the tension testing module; the lower computer is connected with the server through the Internet of things module; the solar power supply module is connected with the single-chip microcomputer control module and the Internet of things module through the power management module and provides power for the single-chip microcomputer control module and the Internet of things module.

2. The parameter monitoring system of the overhead line system anchoring compensation device of claim 1, characterized in that: the upper computer is a client.

3. The parameter monitoring system of the overhead line system anchoring compensation device of claim 1, characterized in that: the tension testing module comprises an analog sensor and a high-precision sensor.

4. The parameter monitoring system of the overhead line system anchoring compensation device of claim 1, characterized in that: the solar power supply module is composed of a solar panel, a storage battery, a power adapter, a support and a connecting wire.

5. The parameter monitoring system of the overhead line system anchoring compensation device of claim 1, characterized in that: the power management module comprises an enabling switch, a power indicator lamp, a 12V direct current source, a 5V direct current source, a 3.3V direct current source, an input voltage sampling circuit and an input undervoltage protection circuit.

6. The parameter monitoring system of the overhead line system anchoring compensation device of claim 3, characterized in that: the high-precision sensor is a steel wire rope sensor.