CN201646779U - Train approach intelligent early warning system - Google Patents

Abstract

The utility model discloses an intelligent train approaching early warning system, which is characterized in that it includes a host and a receiver, and the host includes a host CPU, a signal processor, an encoder, a modulator, a wireless transmitter and two wheel-set sensors , the host CPU, coder, modulator and wireless transmitter are connected in sequence, the input terminal of the signal processor is connected with 2 wheel-set sensors, and the output terminal of the signal processor is connected with the host CPU; the receiver includes receiver CPU, Wireless receiver, demodulator, decoder, alarm and display; the wireless receiver, demodulator, decoder and receiver CPU are connected sequentially, and the alarm and display are connected to the receiver CPU; wireless transmitter Wirelessly communicate with the wireless receiver. The train approaching intelligent early warning system can provide the crossing staff with early warning information that the train is about to arrive in time, effectively avoiding the occurrence of traffic accidents at the crossing.

Description

Train approaching intelligent early warning system

technical field

The utility model belongs to the technical field of electronics and communication, and relates to an intelligent early warning system for trains approaching.

Background technique

Researching a safe, reliable, real-time and accurate railway train approaching warning system has important practical and economic significance for reducing traffic accidents at crossings, improving pedestrian safety and train operation safety. Since the 1980s, many developed countries have introduced computer control technology into crossing signal equipment, adopted advanced timing alarm methods, and developed fully functional crossing signal equipment. The Swedish National Railways (SJ) installs a "vehicle detection system" at level crossings. The automatic induction loop in the system is connected with the automatic train control (ATC) system on the train. When the automatic sensing loop detects road vehicles or other obstacles breaking into the crossing, the "vehicle detection system" will send a parking command to the ATC system. Utilize such security guarantee system can provide protection for train passing level crossing safely. Germany's Hannover-Wurzburg and Mannheim-Stuttgart 427km-long high-speed new lines are equipped with train approaching automatic forecasting devices, which are a set of wireless transmission and fixed-point alarm devices; the British railway safety status is at 20 It was very serious in the 1960s, and in the early 1980s, it was equipped with an automatic alarm system (AWS) and a multi-display signaling device.

In my country, the research on the train approaching safety protection alarm device was carried out in many sections of the whole road as early as the 1970s, and various alarm devices came out. However, limited by the level of electronic technology at that time, it was impossible to form a system, so it could not be popularized on the whole road. Since the 1980s, my country's railways began to equip crossings with DX-type crossing signal equipment, and the train approached from the alarm method for safety protection, but The equipped DX type crossing signal equipment adopts the relay logic control technology, which is difficult to realize the timing alarm mode of speed measurement. After entering the 1990s, and with the rapid development of electronic computer technology, especially the wide application of single-chip microcomputers, the research on train protection and alarm devices has attracted much attention. In 1995, the 724th Research Institute of the 7th Research Institute of China Shipbuilding Industry Corporation developed a special equipment "M9410 Train Wireless Protection Alarm System" that integrates alarm and communication; in 1997, Hangzhou Railway Electronic Technology Research Institute developed the DW -1 Type Crossing Fault Wireless Alarm; The 2000 Academic Annual Conference of the China Railway Society, jointly held by the Safety Supervision Department, Science and Technology Department of the Ministry of Railways and the China Railway Society, determined the theme of "ensure driving safety with technical equipment" and carried out extensive academic research comminicate. And more than 300 new technologies, new equipment and new achievements to ensure traffic safety have been launched by 45 units such as railway bureaus, head offices, and scientific research institutions. The train approach safety protection alarm equipment widely used in the railway engineering system is to ensure traffic safety. And technical equipment for the personal safety of public works workers. In 2004, Beijing University of Science and Technology designed a train approaching alarm system based on vibration sensors.

Although my country's railways have increased financial, material and human resources in recent years, a lot of research has been done on wireless protection and alarm devices, and a variety of safety technology and equipment have been equipped, and significant results have been achieved, but there is still a certain gap compared with developed countries.

Utility model content

The technical problem to be solved by the utility model is to provide a train approaching intelligent early warning system, which can provide the crossing staff with early warning information on the arrival of the train in time, effectively avoiding the occurrence of traffic accidents at the crossing.

The technical scheme that the utility model adopts for solving the problems of the technologies described above is:

A train approaching intelligent early warning system is characterized in that it includes a host and a receiver, the host includes a host CPU, a signal processor, an encoder, a modulator, a wireless transmitter and 2 wheelset sensors, the host CPU, an encoding The device, the modulator and the wireless transmitter are connected in sequence, the input terminal of the signal processor is connected with two wheel set sensors, and the output terminal of the signal processor is connected with the host CPU; the receiver includes a receiver CPU, a wireless receiver, a solution Modulator, decoder, alarm and display; the wireless receiver, demodulator, decoder and receiver CPU are connected sequentially, and the alarm and display are connected with the receiver CPU; the wireless transmitter and the wireless receiver are wireless communication connection.

The host CPU and the receiver CPU both adopt MSC1210 single-chip microcomputer, and the wheel set sensor adopts YCQ-3 type wheel set sensor.

The beneficial effects of the utility model:

The train approaching intelligent early warning system of the utility model does not depend on any equipment and facilities of the electric service, train service, locomotive service, and vehicle system, and does not affect other equipment. It is a set of safe and independent system equipment. It can accurately detect the approaching operation of a train two kilometers away, transmit it wirelessly and give an automatic alarm, providing protection and warning for operating personnel. Its functional characteristics are as follows:

(1) The meaning of the alarm information is clear, and it can accurately detect the running position, speed and running direction of the train two kilometers away.

(2) The installation of the wheel set sensor on the inner side of the rail does not affect the safety of driving and transportation, and at the same time does not affect the equipment of the vehicle, locomotive, electric, vehicle and other departments, and is not restricted by its installation.

(3) It has the function of fault self-detection and self-alarm. When the magnetic sensor of the alarm device is damaged or when the voltage of the battery is lower than the voltage required for normal operation, the receiver will send out an alarm prompt every minute.

(4) The main engine has working time settings and a sleep function, which is suitable for different construction work hours to reduce power consumption.

(5) The shell of the host is small in size, cold-resistant, moisture-proof, and anti-theft. It can be fixed or mobile. The receiver is small and light.

(6) Using solar power, no power supply maintenance is required.

Description of drawings

Fig. 1 is a block diagram of the utility model;

Fig. 2 is a structural schematic diagram of the host;

Figure 3 is a schematic diagram of the workflow of the early warning system.

Detailed ways

Below in conjunction with accompanying drawing and specific embodiment the utility model is further described.

Example 1:

As shown in Figure 1-2, the train approach sensor of the train approach intelligent early warning system adopts the wheel set sensor, the host CPU adopts MSC1210 single-chip microcomputer, uses solar power for power supply, and the receiver adopts a wireless pager.

Two wheel-set sensors of the same type are used as the front-end components of the detection. There is a time difference between the wheel-set sensor that detects the signal and the wheel-set sensor that is detected later, so that the running direction of the train can be obtained; The precision timing counting circuit obtains the time difference detected by the wheel pair sensors. Since the relative distance between the two wheel pair sensors remains unchanged, the speed when the train presses on the wheel pair sensors, that is, the current vehicle speed, can be easily calculated.

The wheel set sensor is installed on the inner side of the rail, it is the eyes of the system, it can sense the passing of the train; the signal processing circuit amplifies and processes the signal received from the wheel set sensor, and the host CPU calculates the time difference between the output signals of the two wheel set sensors, And identify the order of the output signals of the two wheel-set sensors, and calculate the current running direction and running speed of the train according to the time difference and the signal sequence. In addition, the distance from the main engine to the crossing is known, and the main engine CPU calculates the running speed of the train. , the running direction and the distance from the main engine to the crossing are sent to the wireless receiver of the receiver through the wireless transmitter after encoding and modulation. The receiver decodes the received signal and displays it on the display in a certain format, and gives Send out an alarm signal to remind the staff at the crossing that the train is coming and display the corresponding parameters (up or down, vehicle speed, etc.).

The host is composed of five parts: data processing unit (signal processor, encoder), central control unit (host CPU), display unit (monitor), storage unit (EPROM, ROM) and wireless transmitter (high frequency wireless transmitter). as shown in picture 2.

The working procedure of the whole system is: the main engine is set at the railway 2-3 kilometers away from the crossing, the receiver is set on the body of the crossing staff or in the sentry box, and the wheel set sensor sends the pulse signal to the main machine CPU twice, and the main machine CPU The time difference is recorded by the timer, and the vehicle speed is calculated (the distance between the wheelset sensors is constant), and the signal is transmitted to the receiver (that is, the Chinese paging receiver) carried by the crossing personnel through wireless transmission.

Wheelset sensor: Considering that it is completely independent of other equipment and facilities such as electricity, train, locomotive, and vehicles, permanent magnet wheelset sensors are used to realize train approach detection. In order to make the early warning content meet the requirements of the scene, the running direction and speed of the train must be detected, and two sensors of the same type must be used as the front-end components of the detection. The running direction of the train is obtained according to the order in which the signals are detected by the sensors; and then the running speed of the train can be obtained by the ratio of the relative distance between the two sensors and the sensor detection time difference.

Sensor type selection and installation: When selecting the wheel set sensor, the speedometer magnetic head was initially considered, but after installation, it was found that it was easy to fall off and not firm, so it was not used again. Finally, the YCQ-3 wheel set sensor developed by Harbin Railway Bureau Research Institute was selected. The wheel set sensor is installed at the inner rail waist of the rail, and the distance between the centers of the two wheel set sensors is 250mm.

The working process of this embodiment is: when the train comes from afar, the wheel set sensor sends the sensed train wheel set signal to the signal processor for amplification, shaping and filtering, and the processed signal is sent to the encoder and the host CPU at the same time , at this time the encoder will wake up from the sleep state and wait for the calculation result of the host CPU. After the host CPU calculates and processes the signal, it forms original data such as mileage, speed, direction, etc., and these original data are sent to the encoder for encoding. The encoder adjusts the coded data into an analog signal through the modulator and sends it to the wireless transmitter (that is, the transmitting antenna) for transmission. The wireless receiver (that is, the receiving antenna) receives the wireless signal, and the wireless signal forms decoded data through the demodulator and decoder and sends it to the receiver CPU, and the receiver CPU reads the corresponding character points from the font library according to the decoded data The array data is sent to the monitor for display, and the buzzer sends out an early warning sound to remind the staff to pay attention to the approaching train, so that the staff can make preparations in time to avoid accidents. The entire signal transmission process is shown in Figure 3.

Claims (2)

1. A train approaches an intelligent early warning system, characterized in that it comprises a host and a receiver, and the host includes a host CPU, a signal processor, an encoder, a modulator, a wireless transmitter and 2 wheelset sensors, and the host CPU , encoder, modulator and wireless transmitter are connected sequentially, the input terminal of the signal processor is connected with 2 wheelset sensors, and the output terminal of the signal processor is connected with the host CPU; the receiver includes a receiver CPU, a wireless receiver , demodulator, decoder, alarm and display; the wireless receiver, demodulator, decoder and receiver CPU are connected sequentially, and the alarm and display are connected with the receiver CPU; the wireless transmitter and wireless receiver device wireless communication connection. 2. The train approaching intelligent early warning system according to claim 1 is characterized in that, said host CPU and receiver CPU all adopt MSC1210 single-chip microcomputer, and the wheelset sensor adopts YCQ-3 type wheelset sensor.

Images