Novel railway crossing signal monitoring and early warning device

Abstract

The utility model discloses a novel railway crossing signal monitoring and early warning device. The device comprises crossing early warning equipment and two signal source acquisition equipment, the two signal source acquisition devices are installed at designated positions on the two sides of the crossing early warning device respectively. The signal source acquisition equipment comprises a magnetoelectric detection sensor, a first digital channel machine and a first power supply module; the magnetoelectric detection sensor is mounted on the inner side of the track, is used for detecting running data of a train passing through the track and is electrically connected with the first digital channel machine; the first digital channel machine is connected with a directional antenna pointing to the crossing early warning equipment; the crossing early warning equipment is provided with a shell with a specified size, a second digital channel machine, a main control circuit and a second power supply module are arranged in the shell, and a display screen, a loudspeaker and an omnidirectional antenna are arranged on the surface of the shell; the second digital channel machine is electrically connected with the omnidirectional antenna and the main control circuit; and the display screen and the loudspeaker are electrically connected with the main control circuit. The railway crossing monitoring and early warning system can reduce the cost of railway crossing monitoring and early warning.

Description

Technical Field

[0001] The utility model relates to the technical field of railway crossing monitoring, in particular to a novel railway crossing signal monitoring and early warning device. Background Art

[0002] This section is intended to provide a background or context to the embodiments of the utility model recited in the claims. The description herein is not admitted to be prior art by inclusion in this section.

[0003] Railway crossings are the intersections of railways and ordinary roads, and the traffic conditions are relatively complex. Passing pedestrians and vehicles, and trains running back and forth, if not effectively managed and controlled, are likely to cause serious traffic accidents. The existing railway train approaching crossing warning equipment has the following problems. First, most train approaching crossing warning data are still transmitted by wire. Since the signal monitoring and warning equipment is far away from the crossing, generally 1 to 3 kilometers away from both sides of the crossing, the communication distance is long, the environment is complex, wiring is difficult, and the investment cost is high; secondly, unmanned crossings are generally in more remote areas, power supply is relatively difficult, and the installation and maintenance costs of power supply lines are high. Utility Model Content

[0004] The embodiment of the utility model provides a new type of railway crossing signal monitoring and early warning device, which is used to reduce the cost of railway crossing monitoring and early warning. The device includes: a crossing early warning device and at least two signal source acquisition devices; the two signal source acquisition devices are respectively installed at designated positions on both sides of the crossing early warning device along the track;

[0005] The signal source acquisition device includes a magnetoelectric detection sensor, a first digital channel machine and a first power supply module; wherein the magnetoelectric detection sensor is installed on the inner side of the track and is used to detect the travel data of the train passing through the track, and the magnetoelectric detection sensor is electromechanically connected to the first digital channel; the first digital channel machine is connected to a directional antenna pointing to the crossing warning device; the first power supply module is electromechanically connected to the magnetoelectric detection sensor and the first digital channel;

[0006] The crossing warning device has a shell of specified size, a second digital channel machine, a main control circuit and a second power module are arranged inside the shell, and a display screen, a loudspeaker and an omnidirectional antenna are arranged on the surface of the shell; wherein the second digital channel machine is electrically connected to the omnidirectional antenna and the main control circuit, and the display screen and the loudspeaker are electrically connected to the main control circuit; the second power module is electrically connected to the second digital channel machine, the main control circuit, the display screen and the loudspeaker.

[0007] In one embodiment, the magnetoelectric detection sensor is electrically connected to the first digital channel machine via a shielded line.

[0008] In one embodiment, the signal source acquisition device further includes a plurality of indicator lights, and the plurality of indicator lights are respectively connected to the magnetoelectric detection sensor and the first digital channel machine.

[0009] In one embodiment, the first power module includes a solar panel and a battery. The solar panel is connected to the battery. The battery is electromechanically connected to the magnetoelectric detection sensor and the first digital channel.

[0010] In one embodiment, the first digital channel machine includes: a continuous phase shift keying CSBK modulation circuit, a quaternary frequency shift keying 4FSK modulation circuit, a radio frequency power amplifier circuit and a high-order low-pass filter; the CSBK modulation circuit, the 4FSK modulation circuit, the radio frequency power amplifier circuit and the high-order low-pass filter are electrically connected in sequence.

[0011] In one embodiment, the crossing warning device has a wall-mounted housing.

[0012] In one embodiment, the second digital channel machine includes: a radio frequency bandpass filter, an amplifier circuit, a mixer, an ADC sampling circuit, a 4FSK demodulation circuit and a CSBK demodulation circuit; the radio frequency bandpass filter, the amplifier circuit, the mixer, the ADC sampling circuit, the 4FSK demodulation circuit and the CSBK demodulation circuit are electrically connected in sequence.

[0013] In one embodiment, an outdoor signal machine is also included, and the crossing warning device is connected to the outdoor signal machine via an RS422 serial interface.

[0014] In one embodiment, a button is also provided on the surface of the housing, and the button is electrically connected to the main control circuit.

[0015] In one embodiment, a storage hard disk is further disposed inside the housing, and the storage hard disk is electrically connected to the main control circuit.

[0016] In one embodiment, a clock sensor is further disposed inside the housing, and the clock sensor is electrically connected to the display.

[0017] The new railway crossing signal monitoring and early warning device in the embodiment of the utility model comprises: a crossing early warning device and at least two signal source acquisition devices; the two signal source acquisition devices are respectively installed at designated positions on both sides of the crossing early warning device along the track; the signal source acquisition device comprises a magnetoelectric detection sensor, a first digital channel machine and a first power supply module; wherein, the magnetoelectric detection sensor is installed on the inner side of the track and is used to detect the travel data of the train passing through the track, and the magnetoelectric detection sensor is electromechanically connected to the first digital channel; the first digital channel machine is connected with a directional antenna pointing to the crossing early warning device; the first power supply module is electromechanically connected to the magnetoelectric detection sensor and the first digital channel; the crossing early warning device has a shell of a specified size, a second digital channel machine, a main control circuit and a second power supply module are arranged inside the shell, and a display screen, a loudspeaker, and an omnidirectional antenna are arranged on the surface of the shell; wherein the second digital channel is electromechanically connected to the omnidirectional antenna and the main control circuit, and the display screen and the loudspeaker are electrically connected to the main control circuit; the second power supply module is electrically connected to the second digital channel machine, the main control circuit, the display screen, and the loudspeaker. In the embodiment of the utility model, signal source acquisition devices are installed at designated positions on both sides of the crossing warning device. The crossing warning device and the two signal source acquisition devices can realize long-distance wireless transmission based on a digital channel machine. The digital channel machine is inexpensive. Compared with the technical solutions for railway crossing warning in the prior art, it can reduce the cost of railway crossing monitoring and warning while ensuring effective monitoring of railway crossing train information. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the following will briefly introduce the drawings required for use in the embodiments or the prior art descriptions. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work. In the drawings:

[0019] Figure 1 This is a schematic diagram of the structure of a new type of railway crossing signal monitoring and early warning device in an embodiment of the utility model;

[0020] Figure 2 A specific example diagram of a new type of railway crossing signal monitoring and early warning device in the embodiment of the utility model;

[0021] Figure 3 A specific example diagram of a signal source acquisition device in an embodiment of the utility model;

[0022] Figure 4 This is an example diagram of a first power supply module of a signal source acquisition device in an embodiment of the utility model;

[0023] Figure 5 This is a schematic diagram of the structure of a digital channel machine in an embodiment of the utility model;

[0024] Figure 6 A specific example diagram of a crossing warning device in an embodiment of the utility model;

[0025] Figure 7 This is a schematic diagram of the connection structure of the main control circuit of the crossing warning device in the embodiment of the utility model;

[0026] Figure 8 This is another specific example diagram of the signal source acquisition device in the embodiment of the utility model. DETAILED DESCRIPTION

[0027] In order to make the purpose, technical solution and advantages of the embodiment of the utility model more clear, the embodiment of the utility model is further described in detail below in conjunction with the accompanying drawings. Here, the illustrative embodiment of the utility model and its description are used to explain the utility model, but are not used as a limitation of the utility model.

[0028] First, the technical terms involved in this utility model are explained;

[0029] RF power amplifier circuit: Its main function is to increase the power of the signal so that the signal can be transmitted over a longer distance or drive a larger load. The power amplifier is usually located in the final stage of the transmitter to amplify the signal before it is transmitted.

[0030] RF bandpass filter: Its main function is to select signals within a specific frequency range while attenuating or suppressing signals outside the frequency range. It is used to ensure that signals are transmitted only within the required frequency band, thereby reducing interference and noise from other frequencies. RF power amplifier circuits and RF bandpass filters are two different RF circuit components, and their roles in RF wireless transmission are different.

[0031] Figure 1 Schematic diagram of the structure of a new railway crossing signal monitoring and early warning device in the embodiment of the utility model. Figure 1 As shown, the new railway crossing signal monitoring and early warning device includes a crossing early warning device and at least two signal source acquisition devices; the two signal source acquisition devices are respectively installed at designated positions on both sides of the crossing early warning device along the track; wherein,

[0032] The signal source acquisition device includes a magnetoelectric detection sensor, a first digital channel machine and a first power supply module; wherein the magnetoelectric detection sensor is installed on the inner side of the track and is used to detect the travel data of the train passing through the track, and the magnetoelectric detection sensor is electromechanically connected to the first digital channel; the first digital channel machine is connected to a directional antenna pointing to the crossing warning device; the first power supply module is electromechanically connected to the magnetoelectric detection sensor and the first digital channel;

[0033] The crossing warning device has a shell of specified size, a second digital channel machine, a main control circuit and a second power module are arranged inside the shell, and a display screen, a loudspeaker and an omnidirectional antenna are arranged on the surface of the shell; wherein the second digital channel machine is electrically connected to the omnidirectional antenna and the main control circuit, and the display screen and the loudspeaker are electrically connected to the main control circuit; the second power module is electrically connected to the second digital channel machine, the main control circuit, the display screen and the loudspeaker.

[0034] from Figure 1 It can be seen that in the embodiment of the utility model, signal source acquisition devices are installed at designated positions on both sides of the crossing warning device. The crossing warning device and the two signal source acquisition devices can realize long-distance wireless transmission based on a digital channel machine. The digital channel machine is inexpensive. Compared with the technical solutions for railway crossing warning in the prior art, it can reduce the cost of railway crossing monitoring and warning while ensuring effective monitoring of railway crossing train information.

[0035] Figure 2 FIG. 1 is a specific example diagram of a new type of railway crossing signal monitoring and early warning device in the embodiment of the utility model, as shown in FIG. Figure 2 As shown, the crossing warning device is installed in the railway crossing area, and two signal source acquisition devices are installed at designated locations of 1-3 kilometers on the track on both sides of the crossing warning device.

[0036] Figure 3 This is a specific example diagram of the signal source acquisition device in the embodiment of the utility model. Figure 3 Introduce signal source acquisition equipment.

[0037] The signal source acquisition device uses a sensitive magnetoelectric detection sensor, such as a railway wheel sensor, to detect in real time whether a train passes through a monitoring point on the railway line, and sends the collected train travel information to the crossing warning device via a 400MHz wireless channel.

[0038] Based on the principle of current generated by magnetic cutting wires, the magnetoelectric detection sensor uses railway wheel sensors with stable detection work, high sensitivity and sturdy and durable casing to monitor vehicles approaching and leaving the crossing, and realize non-contact real-time monitoring of train wheels passing over the railway wheel sensors, and obtain information on the train's running speed and direction of travel.

[0039] Based on AD digital signal sampling technology and digital filtering technology, the magnetic coil of the railway wheel sensor senses the railway train wheels passing over it and generates a sinusoidal wave signal. After the sinusoidal wave signal passes through AD digital sampling, digital filtering, and temperature adaptive algorithm, it outputs a stable and reliable high-level signal. According to the duration of this high-level signal, the locomotive speed information is generated to realize the monitoring of trains approaching the crossing.

[0040] In one embodiment, the magnetoelectric detection sensor is electrically connected to the first digital channel machine via a shielded line, which effectively improves the reliability of the detection signal transmission.

[0041] The signal source acquisition device may further include a plurality of indicator lights, which are respectively connected to the magnetoelectric detection sensor and the first digital channel machine. Figure 3 Medium 400MHz digital channel machine.

[0042] For example, the signal source acquisition device includes four LED indicators: one is the power indicator, which is always on after the device is powered on; the second is the indicator for receiving the output signal of the railway wheel sensor. When the railway wheel sensor output signal is received, the indicator light is on, otherwise it is off; the third is the 400MHz digital channel machine receiving indicator, which is on when the channel machine receives the carrier frequency, otherwise it is off; the fourth is the 400MHz digital channel machine sending indicator, which is on when the channel machine is in the transmitting state, otherwise it is off. The indicator light uses a high-quality, durable, and low-power LED indicator light to effectively reduce the energy consumption of the equipment.

[0043] In one embodiment, the first power supply module includes a solar panel and a battery. The solar panel is connected to the battery. The battery is electromechanically connected to the magnetoelectric detection sensor and the first digital channel.

[0044] Figure 4 This is an example diagram of the first power module of the signal source acquisition device in the embodiment of the utility model. The first power module in the embodiment of the utility model is compatible with wired power supply and solar power supply. When the signal source acquisition device is powered by an AC220V power supply provided by a laid power line, the device is equipped with an AC220V to DC13.8V power module. The DC13.8V power module provides working voltage for other units of the device and charges the DC12V battery. When there is no AC220V power supply, the crystalline silicon solar panel provides the corresponding voltage and current for charging the DC12V battery. The battery output voltage can provide a reliable and stable DC12V working voltage for the device, wherein the DC12V battery may include components such as a charge and discharge protection circuit and a battery pack.

[0045] Crystalline silicon solar panels are the mainstream solar panels at present, with the advantages of high photoelectric conversion efficiency and long life. The battery has overcharge and over-discharge protection circuits, which effectively protect the battery and extend the battery life. The standard configuration battery can meet the normal operation needs of the equipment without any charging conditions for three days.

[0046] In one embodiment, the first digital channel machine includes: a CSBK (Continuous-Phase Binary Phase-Shift Keying, CSBK, referred to as continuous phase shift keying) modulation circuit, a 4FSK (Quadrature Frequency-Shift Keying, 4FSK, referred to as quaternary frequency shift keying) modulation circuit, a radio frequency power amplifier circuit and a high-order low-pass filter; the CSBK modulation circuit, the 4FSK modulation circuit, the radio frequency power amplifier circuit and the high-order low-pass filter are connected in sequence to process the train travel data in sequence.

[0047] In one embodiment, the second digital channel machine includes: a radio frequency bandpass filter, an amplifier circuit, a mixer, an ADC sampling circuit, a 4FSK demodulation circuit and a CSBK demodulation circuit; the radio frequency bandpass filter, the amplifier circuit, the mixer, the ADC sampling circuit, the 4FSK demodulation circuit and the CSBK demodulation circuit are connected in sequence to process the received data in turn.

[0048] In general, the digital channel machine in the embodiment of the utility model is as follows Figure 3 As shown in , it includes a CSBK modulation and demodulation circuit, a 4FSK modulation and demodulation circuit and a wireless RF transceiver circuit.

[0049] Figure 5 This is a schematic diagram of the structure of the digital channel machine in the embodiment of the utility model, referring to Figure 5 In the embodiment of the utility model, the digital channel machine is integrated based on TDMA digital wireless communication technology. The first digital channel machine utilizes Figure 5 The hardware structure of the middle and upper part uses the control signaling message data structure (CSBK data structure) in the DMR protocol to encapsulate the data collected when the train approaches and the self-test response data of the crossing warning equipment, and then performs wireless data modulation and transmission on the data. Figure 5 The hardware structure in the middle and lower parts performs data demodulation and processing. The CSBK data structure is safe and efficient, and is very suitable for wireless transmission of warning data when a train approaches.

[0050] When data is sent, the digital channel machine performs CSBK data modulation on the data. The CSBK modulation circuit can be set to add data blocks (LB), protection flags (PF), control signaling block operation codes (CSBKO), function set identifiers (FID) and CRC check codes to achieve effective data transmission and reception and ensure the correctness of the received and sent data. Then BPTC encoding is performed, that is, FEC error correction and data encryption information are added to achieve data protection and encryption functions. An interleaver encoding unit can also be added to add control information such as frame synchronization and time slot type to achieve the control logic channel transmission function, and then the data is sent to the baseband chip; the baseband chip modulates the data into a 4FSK signal, and the 4FSK signal is sent to the radio frequency power amplifier circuit for multi-stage amplifier amplification. The signal has a sufficiently large signal power to achieve wireless transmission. At the same time, the automatic power control circuit automatically adjusts the carrier signal transmission power. Finally, the carrier signal is sent to a high-order low-pass filter and then wirelessly transmitted. The high-order low-pass filter has the function of improving the suppression of out-of-band harmonics and stray signals, which effectively improves the anti-interference ability of the train approach warning signal.

[0051] When receiving data, the wireless carrier signal is sent to the RF bandpass filter to amplify the effective bandpass signal and filter out the out-of-band interference signal. Then, the effective signal is obtained after passing through the low-noise amplifier circuit, and the difference frequency processing is performed with the first local oscillator signal in the mixer to obtain the first intermediate frequency signal. The noise signal is further suppressed by the intermediate frequency filter, and then the intermediate frequency signal is amplified and mixed for the second time to obtain the second intermediate frequency. The signal is then sampled by the ADC and demodulated to obtain the 4FSK signal, which is sent to the baseband chip for 4FSK signal demodulation to obtain CSBK data, and then sent to the channel machine CPU for decryption, FEC error correction check and CRC check. After demodulation, the response data of the crossing warning equipment is obtained and sent to the main control circuit for analysis and subsequent processing.

[0052] Figure 6 This is a specific example diagram of the crossing warning device in the embodiment of the utility model. Figure 6 Introduce the level crossing warning equipment.

[0053] The main function of the crossing warning equipment is to use 400MHz wireless digital communication to receive train approach warning information from the signal source acquisition equipment, and to issue train approach warnings to passing pedestrians, vehicles, etc. in the form of sound and light alarms, effectively improving crossing traffic safety.

[0054] like Figure 6As shown, the crossing warning device is mainly composed of a 400MHz digital channel unit, a main control circuit, a key display unit, a FLASH storage unit, a clock unit, an RS422 communication unit, a USB communication unit, and a power supply unit. In one embodiment, the crossing warning device has a wall-mounted housing. The crossing warning device can be installed in an integrated manner on a wall or a designated column.

[0055] 1) 400MHz digital channel unit

[0056] The 400MHz digital channel machine unit is the same 400MHz digital-to-analog compatible channel machine as the above-mentioned signal source acquisition equipment, and the channel machines of the two devices are set at the same operating frequency to achieve high-speed, stable and reliable wireless data transmission between the signal source acquisition equipment and the crossing warning equipment, and efficiently realize wireless communication of the crossing warning equipment.

[0057] 2) Main control circuit

[0058] Figure 7 The figure is a schematic diagram of the connection structure of the main control circuit of the crossing warning device in the embodiment of the utility model. The main control circuit connects various components based on the specified protocol interface and communicates with each component. The communication methods include IIC (Inter-Integrated Circuit), RS422 serial port, SPI (Serial Peripheral Interface) interface, etc. For example, it is connected to the 400MHz digital channel machine unit through GPIO (General Purpose Input Output) and UART (Universal Asynchronous Receiver / Transmitter), as shown in the following figure. Figure 7 As shown, the main control circuit controls the color LCD display and responds to key operations in a timely manner.

[0059] 3) Button display unit

[0060] In one embodiment, a button is also provided on the surface of the shell. The button display unit adopts high-quality micro switch buttons and a high-definition, low-power color LCD display to realize a friendly human-computer interaction interface, realize the query and display of received train warning information, realize the setting and query of local parameters such as the channel, transmission power and receiving threshold of the 400MHz digital channel machine, and the device time, and realize the self-check fault alarm display function of the crossing warning equipment. The button display unit has a crossing fault button. When a fault occurs at the crossing, the alarm function is activated by pressing the crossing fault alarm button for 3 seconds; when the fault is contacted, the alarm state can be released by pressing the crossing fault alarm button for 3 seconds.

[0061] 4) USB communication unit, using efficient TTL level and USB level conversion chip to achieve high-speed serial digital communication between the crossing warning equipment and other computers; to achieve high-speed reading of historical data information stored in the crossing warning equipment through special software of other computers, to provide corresponding data basis for crossing safety management and crossing equipment maintenance; to achieve maintenance and upgrade of the crossing warning equipment through computer special software.

[0062] 5) FLASH storage unit

[0063] In one embodiment, a storage hard disk is also provided inside the housing, and the storage hard disk is electrically connected to the main control circuit. Based on the high-speed SPI serial communication interface, the crossing warning device uses a non-volatile NandFLASH memory chip with fast data read and write speed and large capacity, and efficiently realizes the fast writing and reading of crossing warning device parameters, warning information data, and alarm information data.

[0064] For example, the storage hard disk in the crossing warning device can store 30 days of train approach warning information data and crossing fault warning information data. Special software on other computers can read and store these historical data through the USB interface to realize the transfer function of historical data. These historical data can be used to provide reliable data basis for crossing traffic safety management and crossing fault analysis.

[0065] 6) RS422 communication unit

[0066] In one embodiment, the new railway crossing signal monitoring and early warning device may further include an outdoor signal machine, and the crossing early warning device is connected to the outdoor signal machine via an RS422 serial interface.

[0067] The RS422 communication unit uses a high-quality, efficient TTL level and RS422 level conversion chip to achieve high-speed serial digital communication between the crossing warning device and the outdoor signal. When the crossing warning device receives the warning information of the approaching train, it sends the train approaching warning information to the outdoor signal through RS422, and then the outdoor signal performs the corresponding crossing traffic sound and light indication.

[0068] In one embodiment, a clock sensor is further disposed inside the housing, and the clock sensor is electrically connected to the display.

[0069] The working principle of the new railway crossing signal monitoring and early warning device in the embodiment of the utility model is introduced below.

[0070] The new railway crossing signal monitoring and early warning device is an important safety warning device to ensure the safety of railway trains, pedestrians and motor vehicles. The new railway crossing signal monitoring and early warning device uses the signal source acquisition device to accurately detect the running direction and speed information of the train approaching the crossing, and then generates the train approaching early warning information data, sends the data to the crossing early warning device based on the digital channel machine, and starts the crossing early warning device and the outdoor signal machine to perform the corresponding sound and light alarm. It efficiently realizes the reliable train approaching crossing early warning function and effectively meets the needs of crossing traffic safety management.

[0071] The signal source acquisition equipment uses two sets of magnetoelectric detection sensors installed sequentially on the inner side of the track along the railway line. Figure 8 FIG. 2 is another specific example of a signal source acquisition device in an embodiment of the present utility model. Figure 8 As shown, the signal source acquisition device may also have an integrated all-in-one machine and an external magnetoelectric detection sensor. When there is no train passing by, the magnetoelectric detection sensor has no signal output. When there is a train passing by, the magnetoelectric detection outputs a continuous high-level signal to generate a train warning information data frame containing train speed, up, down, approaching or far from the crossing. The data frame is sent to the 400MHz digital channel machine, and by starting the 400MHz channel machine to transmit, it is wirelessly sent to the crossing warning device, realizing efficient, safe and reliable train approach warning signal monitoring and acquisition functions.

[0072] The crossing warning equipment receives train approach warning information through a 400MHz wireless digital channel machine, and analyzes the train approach warning data after CSBK data demodulation processing on the received information, and then determines the time at which the train approaching the crossing is away from the crossing, whether the train is an up or down train, and whether the train is approaching or moving away from the crossing, and stores the warning information.

[0073] When approaching a crossing, the crossing warning device displays the approach time countdown and up and down direction information. At the same time, the outdoor unit gives an audible and visual alarm, that is, the high-brightness LED display and tweeter of the outdoor signal machine are activated to give an audible and visual alarm to passers-by, thereby ensuring the safety of passers-by and vehicles.

[0074] When the information sent by the signal source monitoring and collection equipment is information about a train leaving a crossing, the crossing warning equipment does not process the data.

[0075] There is a crossing fault alarm button on the panel of the crossing warning device. When a fault occurs at the crossing, long press this button to start the crossing fault alarm and cyclically send the crossing fault alarm information data frame to the train approaching the crossing. At the same time, the outdoor unit will sound and light alarm, and the crossing warning device will store the crossing fault alarm information in the storage unit; the crossing attendant can long press this button to cancel the crossing fault alarm, stop sending alarm data, and the outdoor unit will stop sound and light alarm, effectively ensuring the safety of railway train operation.

[0076] To sum up, in the embodiment of the utility model, signal source acquisition devices are installed at designated positions on both sides of the crossing warning device. The crossing warning device and the two signal source acquisition devices can realize long-distance wireless transmission based on a digital channel machine. The digital channel machine is inexpensive. Compared with the technical solutions for railway crossing warning in the prior art, it can reduce the cost of railway crossing monitoring and warning while ensuring effective monitoring of train information at railway crossings.

[0077] The specific embodiments described above further illustrate the purpose, technical solutions and beneficial effects of the utility model in detail. It should be understood that the above description is only a specific embodiment of the utility model and is not intended to limit the scope of protection of the utility model. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the utility model should be included in the scope of protection of the utility model.

Claims

1. A new type of railway crossing signal monitoring and early warning device, characterized in that: include: Crossing warning equipment and at least two signal source acquisition devices; Two signal source acquisition devices are installed along the track at designated locations on both sides of the crossing warning device; The signal source acquisition device includes a magnetoelectric detection sensor, a first digital channel machine and a first power supply module; wherein the magnetoelectric detection sensor is installed on the inner side of the track and is used to detect the travel data of the train passing through the track, and the magnetoelectric detection sensor is electromechanically connected to the first digital channel; the first digital channel machine is connected to a directional antenna pointing to the crossing warning device; the first power supply module is electromechanically connected to the magnetoelectric detection sensor and the first digital channel; The crossing warning device has a shell of specified size, a second digital channel machine, a main control circuit and a second power module are arranged inside the shell, and a display screen, a loudspeaker and an omnidirectional antenna are arranged on the surface of the shell; wherein the second digital channel machine is electrically connected to the omnidirectional antenna and the main control circuit, and the display screen and the loudspeaker are electrically connected to the main control circuit; the second power module is electrically connected to the second digital channel machine, the main control circuit, the display screen and the loudspeaker.

2. The new railway crossing signal monitoring and early warning device according to claim 1 is characterized in that: The magnetoelectric detection sensor is electrically connected to the first digital channel machine through a shielded line.

3. The new railway crossing signal monitoring and early warning device according to claim 1 is characterized in that: The signal source acquisition device also includes a plurality of indicator lights, which are respectively connected to the magnetoelectric detection sensor and the first digital channel machine.

4. The new railway crossing signal monitoring and early warning device according to claim 1 is characterized in that: The first power supply module includes a solar panel and a battery. The solar panel is connected to the battery. The battery is electromechanically connected to the magnetoelectric detection sensor and the first digital channel.

5. The new railway crossing signal monitoring and early warning device according to claim 1 is characterized in that: The first digital channel machine includes: a continuous phase shift keying CSBK modulation circuit, a quaternary frequency shift keying 4FSK modulation circuit, a radio frequency power amplifier circuit and a high-order low-pass filter; the CSBK modulation circuit, the 4FSK modulation circuit, the radio frequency power amplifier circuit and the high-order low-pass filter are electrically connected in sequence.

6. The new railway crossing signal monitoring and early warning device according to claim 1 is characterized in that: The second digital channel machine includes: a radio frequency bandpass filter, an amplifier circuit, a mixer, an ADC sampling circuit, a 4FSK demodulation circuit and a CSBK demodulation circuit; the radio frequency bandpass filter, the amplifier circuit, the mixer, the ADC sampling circuit, the 4FSK demodulation circuit and the CSBK demodulation circuit are electrically connected in sequence.

7. The new railway crossing signal monitoring and early warning device according to claim 1 is characterized in that: It also includes an outdoor signal machine, and the crossing warning equipment is connected to the outdoor signal machine through an RS422 serial interface.

8. The new railway crossing signal monitoring and early warning device according to claim 1 is characterized in that: The surface of the shell is also provided with buttons, which are electrically connected to the main control circuit.

9. The new railway crossing signal monitoring and early warning device according to claim 1, characterized in that: A storage hard disk is also arranged inside the shell, and the storage hard disk is electrically connected to the main control circuit.

10. The new railway crossing signal monitoring and early warning device according to claim 1, characterized in that: A clock sensor is also arranged inside the shell and is electrically connected to the display.

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