Device for pre-warning approaching of coming vehicle by broadcasting

Abstract

The utility model discloses a coming vehicle broadcast approaching early warning device, which is applied to the field of special railway radio frequency signal receivers, and aims to solve the problems that most of the existing LBJ (Local Broadcasting Junction) vehicle machine platform receiving equipment adopts an 800MHz target channel machine to receive vehicle machine signals, but the 800MHz target channel machine can be manufactured by a special communication manufacturer, and the cost is high; according to the utility model, the special integrated radio frequency chip and the decoding chip are adopted to replace a 800MHZ channel machine, the working frequency range of the coming vehicle broadcast approaching device is from 150 MHz to 960MHz, and the coming vehicle broadcast approaching device can cover the global frequency range of LBJ equipment, including follow-up vehicle following and other related vehicle information, so that the information of the coming vehicle broadcast approaching device is greatly improved, and the service life of the coming vehicle broadcast approaching device is prolonged. The radio frequency receiver module based on the design of the utility model can well receive vehicle information sent by an LBJ locomotive station, and the equipment cost is lower.

Description

Technical Field

[0001] The utility model belongs to the field of special railway radio frequency signal receivers, in particular to a railway approaching broadcast warning device for approaching trains. Background Art

[0002] The train approaching broadcast warning device is based on the approaching train. The LBJ device on the train transmits high-frequency radio signals to regularly or regularly transmit the speed, train number, running status and other related information of the incoming train. The high-frequency radio wave signal is modulated and demodulated into a digital signal through a special handheld receiving device, and the useful information is displayed through digital signal processing and collection. The train approaching broadcast warning device uses sound, light, and display to remind the on-site operators and train drivers to protect the safety of people's lives and property.

[0003] Through market research and related information, there are many kinds of vehicle approach warning devices and systems on the market, with different uses and scenarios. The vehicle approach warning devices on the market are mainly composed of the following solutions:

[0004] Solution 1: Add sensors and data transmission devices to the vehicle approach warning device. Figure 1 As shown, by arranging sensor arrays and data acquisition and transmission devices on both sides of the train track 2-3 km in front of the approach warning device, the sensor array obtains train information passing information, and the data acquisition and transmission device obtains sensor information and transmits it to the approach warning device through wireless transmission. The sensor array uses infrared beam, laser sensor, etc.; the transmission uses: 4G, LORA, RF, ZIGBEE, etc., except for the 4G transmission distance.

[0005] Solution 2: Using a radio receiver to obtain vehicle information Figure 2 As shown, the vehicle information is obtained by using a radio receiver to obtain the exclusive radio waves emitted by the vehicle LBJ locomotive station; this solution can reduce the deployment of sensors, on-site data collection and transmission devices, reduce costs and increase efficiency. However, there are also many problems in using a radio receiving device to obtain locomotive information:

[0006] First of all, the LBJ vehicle machine is a special device with a fixed transmission frequency band and coding method.

[0007] Secondly, to obtain the RF data of the LBJ vehicle station, the corresponding RF receiver and decoder are required. At present, most of the receiving devices that support the LBJ vehicle station use the target signal to receive the vehicle station signal. However, there are few manufacturers of 800MHz channel machines and few production equipment. Or only dedicated communication manufacturers can produce channel machines in the 800MHZ frequency band. Therefore, the equipment cost is also high. Utility Model Content

[0008] In order to solve the above technical problems, the utility model proposes a vehicle approach broadcast warning device, which adopts a dedicated integrated radio frequency chip and a decoding chip to receive and process the vehicle information sent by the LBJ locomotive station. Compared with traditional radio frequency radio stations and car radio stations, the device of the utility model has low cost, is more flexible and convenient to use, and has a wider range of application scenarios.

[0009] The technical solution adopted by the utility model is: a vehicle approaching broadcast warning device, comprising: a data processing module, and a warning module and a battery management unit connected to the data processing module; the data processing module is used to receive the high-frequency radio signal sent by the LBJ locomotive station; the battery management unit is used to supply power to the data processing module and the warning module;

[0010] The data processing module includes: a radio frequency transceiver unit and an MCU processing unit; the radio frequency transceiver unit is implemented by using a SX1262 chip, and the MCU processing unit is implemented by using a STM32F030C8T6 single chip microcomputer; the STM32F030C8T6 single chip microcomputer is connected to the SX1262 chip using an SPI port.

[0011] The early warning module at least includes a sound vibration unit; the sound vibration unit includes: a sound alarm circuit and a buzzer.

[0012] Beneficial effects of the utility model: the vehicle approach broadcast warning device designed by the utility model is connected to the train LBJ equipment. No additional vehicle detection sensors and data transmission devices are required. The utility model adopts a dedicated integrated radio frequency chip and a decoding chip to replace the 800MHZ channel machine; the radio frequency receiver module designed by the utility model can well receive the vehicle information sent by the LBJ locomotive station. The working frequency band of the vehicle approach broadcast device of the utility model is from 150-960MHz, which can cover the full frequency band of the LBJ equipment, including subsequent vehicle following and other related vehicle information. The utility model includes the following advantages:

[0013] 1. The data processing module is composed of RF receiving chip and MCU decoding. Compared with traditional RF radio and car radio, it has low cost, more flexible and convenient use, and wider application scenarios.

[0014] 2. The code data analysis is more intelligent, and the MCU is flexibly used to parse the POCSAG code to complete the code stream data analysis, which is more efficient and requires less external support circuits;

[0015] 3. The product has more diversified functions, small size, wearable, and can be mounted to meet various needs. It can be made into a receiving device hung around the waist or placed on the shoulder. The product can be split, and the flash reminder can be a separate one, hung on the shoulder, and the flash alarm is activated by receiving the data threshold of the approaching warning device through the broadcast of the incoming vehicle;

[0016] 4. The product can remind railway inspection or construction personnel to pay attention to oncoming vehicles and avoid unnecessary personal injuries. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 The schematic diagram of the vehicle approaching broadcast warning device with sensors and data transmission devices added in the prior art;

[0018] Figure 2 A schematic diagram of the principle of using a radio receiving device to obtain vehicle information in the prior art;

[0019] Figure 3 This is a diagram of the vehicle approaching broadcast warning device of the utility model;

[0020] Figure 4 This is the circuit diagram of the SX1262 chip;

[0021] Figure 5 This is the circuit diagram of the STM32F030C8T6 microcontroller;

[0022] Figure 6 This is the circuit diagram of TPS54332 chip;

[0023] Figure 7 This is the circuit diagram of the ASM1117-3V3 chip. DETAILED DESCRIPTION

[0024] In order to facilitate those skilled in the art to understand the technical content of the present invention, the present invention is further explained below with reference to the accompanying drawings.

[0025] The utility model adopts a dedicated integrated radio frequency chip and a decoding chip to replace the 800MHZ channel machine. The radio frequency receiver module designed in the utility model can well receive the vehicle information sent by the LBJ locomotive station. After data processing, a vehicle broadcast approach warning device is derived. The working frequency band of the vehicle broadcast approach warning device of the utility model is from 150-960MHz, which can cover the full frequency band of the LBJ equipment, including subsequent vehicle following and other related vehicle information. The price and advantages of the equipment are greatly reflected. The technical solution and technical barriers are easier to break and realize.

[0026] like Figure 3As shown, the vehicle approach broadcast warning device of the utility model includes: a radio frequency transceiver circuit, a data encoding and decoding, an MCU processor, a keyboard unit, a sound vibration unit, an information display unit, a wearable flash unit, an information storage unit, and a battery management unit.

[0027] The RF signal receiving circuit is made of a dedicated RF chip, and the SX1262, a long-distance and low-power sub-GHz wireless transceiver launched by Semtech, supports the working frequency band of 150-960MHz. SX1262 provides GFSK modulation mode. After the MCU parses the POCSAG code, it pushes the information to the LCD screen for display, or sends the data out through the serial port. The relevant alarm threshold parameters are set through the key module. When the threshold parameter is reached, the MCU triggers the sound and light alarm, and the LCD screen flashes. Remind the construction operators to avoid and enhance the sight of the train followers.

[0028] The alarm threshold here can be a distance threshold, a speed threshold or the time when the train arrives; the specific value can be set according to actual needs.

[0029] The circuit diagram of SX1262 chip is as follows: Figure 4 As shown in the figure, the SX1262 radio wave adopts GFSK modulation and demodulation mode, and obtains the radio wave signal by setting the internal register; after the radio wave is demodulated by the SX1262 chip, the preamble code, synchronization code, address code, information code, and related data frames are obtained to form the POCSAG protocol.

[0030] The MCU of the utility model adopts STM32F030C8T6 single-chip microcomputer as the core CPU responsible for data algorithm processing and analysis. STM32F030C8T6 adopts SPI port to connect with SX1262 module. SX1262 is accessed through programming via SPI interface. MCU system circuit also includes clock, reset, start, indication, debug port and external communication port circuit. The circuit principle of STM32F030C8T6 single-chip microcomputer is as follows Figure 5 shown.

[0031] The button module is mainly responsible for parameter and page settings and display. Figure 5 As shown, the key module specifically includes: a key KEY1, a resistor R3 and a capacitor C3, the first end of the resistor R3 is connected to VCC3.3V, the second end of the resistor R3 is connected to the first end of the key KEY1, the second end of the key KEY1 is grounded, the first end of the capacitor C3 is connected to the first end of the key KEY1, the second end of the capacitor C3 is connected to the second end of the key KEY1, and the first end of the key KEY1 is also connected to the 10th pin of the STM32F030C8T6 microcontroller.

[0032] The sound alarm circuit drives the buzzer to sound to alert the on-site construction personnel. Figure 5 As shown, the sound alarm circuit includes: a buzzer BUZZER, a transistor Q1, and a resistor R14. The first end of the buzzer BUZZER is connected to VCC5V, the second end of the buzzer BUZZER is connected to the collector of the transistor Q1, the emitter of the transistor Q1 is grounded, the base of the transistor Q1 is connected to the first end of the resistor R14, and the second end of the resistor R14 is connected to the PA1 pin of the STM32F030C8T6 microcontroller.

[0033] The light alarm circuit includes: a diode D3, a resistor R15, a resistor R16, and a transistor Q2. The first end of the resistor R16 is connected to VCC5V, the second end of the resistor R16 is connected to the first end of the diode D3, the second end of the diode D3 is connected to the collector of the transistor Q2, the collector emitter of the transistor Q2 is grounded, the base of the transistor Q2 is connected to the first end of the resistor R15, and the second end of the resistor R15 is connected to the PB0 pin of the STM32F030C8T6 microcontroller.

[0034] The information display circuit mainly displays LCD page information, and displays train related information according to the information sent by the LBJ device, such as train number, speed, kilometer mark, direction, voltage, signal strength, etc.

[0035] Wearable flash alarm is an extended device that can be mounted on the body or shoulder of construction workers on site. The threshold information is obtained through MCU to trigger the flash alarm.

[0036] The storage information unit mainly stores the information sent by the LBJ device, device number, personnel information, affiliated company, etc.

[0037] The battery management circuit is responsible for charging and discharging the device and protecting the battery. The battery management circuit includes: battery power supply and management unit P1, DC-DC buck chip TPS54332, through Figure 6 The DC-DC step-down chip TPS54332 shown in the figure converts the DC12V output by the battery power supply and management unit P1 into a DC5V voltage, and then Figure 7 The LDO linear voltage regulator chip ASM1117-3V3 shown adjusts the DC5V voltage to DC3.3V to power the MCU.

[0038] The DC-DC step-down chip TPS54332 converts DC12V into DC5V voltage. The specific circuit based on it also includes: diode D1, diode D2, capacitor C13, capacitor C14, capacitor C15, capacitor C16, capacitor C17, capacitor C18, capacitor C19, capacitor C20, capacitor C21, capacitor C22, capacitor C23, inductor L1, resistor R4, resistor R5, resistor R7, resistor R9, resistor R10; Figure 6As shown, the VCC12V voltage output by the battery power supply and management unit P1 is connected to the positive electrode of the diode D2, the negative electrode of the diode D2 is connected to the first end of the capacitor C18, the second end of the capacitor C18 is grounded, the first end of the capacitor C19 is connected to the first end of the capacitor C18, the second end of the capacitor C19 is grounded, the first end of the capacitor C20 is connected to the first end of the capacitor C18, the second end of the capacitor C20 is grounded, the first end of the resistor R5 is connected to the first end of the capacitor C18, the second end of the resistor R5 is connected to the first end of the resistor R9, the second end of the resistor R9 is grounded, and the DC-DC step-down chip TPS543 The first pin of 32 is connected to the first end of capacitor C13, the second end of capacitor C13 is connected to the eighth pin of DC-DC buck chip TPS54332, the second pin of DC-DC buck chip TPS54332 is connected to the first end of resistor R5, the third pin of DC-DC buck chip TPS54332 is connected to the second end of resistor R5, the fourth pin of DC-DC buck chip TPS54332 is connected to the first end of capacitor C23, the second end of capacitor C23 is grounded, and the fifth pin of DC-DC buck chip TPS54332 is connected to VSEN 5V, the sixth pin of the DC-DC buck chip TPS54332 is connected to the first end of the capacitor C21, the second end of the capacitor C21 is connected to the first end of the resistor R10, the second end of the resistor R10 is grounded, the seventh pin of the DC-DC buck chip TPS54332 is grounded, the positive pole of the diode D2 is grounded, the negative pole of the diode D2 is connected to the eighth pin of the DC-DC buck chip TPS54332, the first end of the inductor L1 is connected to the eighth pin of the DC-DC buck chip TPS54332, the second end of the inductor L1 is connected to the A first terminal of the capacitor C15 is connected to the second end of the inductor L1, a second terminal of the resistor R4 is connected to the first end of the resistor R7, a second end of the resistor R7 is grounded, a first terminal of the capacitor C22 is connected to the first end of the capacitor C21, a second end of the capacitor C22 is grounded, a first terminal of the capacitor C16 is connected to the second end of the inductor L1, a second end of the capacitor C16 is grounded, a first terminal of the capacitor C17 is connected to the second end of the inductor L1, a second end of the capacitor C17 is grounded, and a VCC5V voltage is output from the first end of the capacitor C17;

[0039] The LDO linear voltage regulator chip ASM1117-3V3 adjusts the DC5V voltage to DC3.3V. The specific circuit based on it also includes: capacitor C25, capacitor C26, Figure 7 As shown, the first end of capacitor C17 is connected to the third end of LDO linear voltage regulator chip ASM1117-3V3, the first end of LDO linear voltage regulator chip ASM1117-3V3 is grounded, the second end of LDO linear voltage regulator chip ASM1117-3V3 is connected to the first end of capacitor C25 and the first end of capacitor C26, the second end of capacitor C25 and the second end of capacitor C26 are grounded, and the first end of capacitor C25 outputs VC3.3V voltage.

[0040] LBJ on-board train radio adopts POCSAG coding for transmission. Using MCU to directly connect to the POCSAG code sent by LBJ on-board train radio is more efficient.

[0041] Those skilled in the art will appreciate that the embodiments described herein are intended to help readers understand the principles of the present invention, and should be understood that the scope of protection of the present invention is not limited to such specific statements and embodiments. For those skilled in the art, the present invention may have various modifications and variations. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention shall be included in the scope of the claims of the present invention.

Claims

1. A vehicle approaching broadcast warning device, characterized in that: include: A data processing module, and an early warning module and a battery management unit connected to the data processing module; The data processing module is used to receive the high-frequency radio signal sent by the LBJ locomotive station; The battery management unit is used to supply power to the data processing module and the early warning module; The data processing module includes: a radio frequency transceiver unit and an MCU processing unit; the radio frequency transceiver unit is implemented by using a SX1262 chip, and the MCU processing unit is implemented by using a STM32F030C8T6 single chip microcomputer; the STM32F030C8T6 single chip microcomputer is connected to the SX1262 chip using an SPI port; The early warning module at least includes a sound vibration unit; the sound vibration unit includes: a sound alarm circuit and a buzzer.

2. The vehicle approaching broadcast warning device according to claim 1, characterized in that: The operating frequency band of the SX1262 chip is 150-960MHz.

3. The vehicle approaching broadcast warning device according to claim 2, characterized in that: The battery management unit provides VCC5V and VCC3.3V.

4. The vehicle approaching broadcast warning device according to claim 3, characterized in that: The sound alarm circuit includes a transistor Q1, a resistor R14, a first end of a buzzer connected to VCC5V, a second end of a buzzer connected to the collector of the transistor Q1, an emitter of the transistor Q1 grounded, a base of the transistor Q1 connected to a first end of the resistor R14, and a second end of the resistor R14 connected to the PA1 pin of the STM32F030C8T6 microcontroller.

5. The vehicle approaching broadcast warning device according to claim 4, characterized in that: The early warning module also includes a light alarm circuit, which includes: a diode D3, a resistor R15, a resistor R16, and a transistor Q2. The first end of the resistor R16 is connected to VCC5V, the second end of the resistor R16 is connected to the first end of the diode D3, the second end of the diode D3 is connected to the collector of the transistor Q2, the collector emitter of the transistor Q2 is grounded, the base of the transistor Q2 is connected to the first end of the resistor R15, and the second end of the resistor R15 is connected to the PB0 pin of the STM32F030C8T6 microcontroller.

6. The vehicle approaching broadcast warning device according to claim 5, characterized in that: It also includes a key module connected to the data processing module, the key module includes: a key KEY1, a resistor R3 and a capacitor C3, the first end of the resistor R3 is connected to VCC3.3V, the second end of the resistor R3 is connected to the first end of the key KEY1, the second end of the key KEY1 is grounded, the first end of the capacitor C3 is connected to the first end of the key KEY1, the second end of the capacitor C3 is connected to the second end of the key KEY1, and the first end of the key KEY1 is also connected to the PA0 pin of the STM32F030C8T6 microcontroller.

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