CN220603635U

CN220603635U - Track circuit detection terminal

Info

Publication number: CN220603635U
Application number: CN202321887359.6U
Authority: CN
Inventors: 张志远; 赵志强; 张洋洋; 王彦磊; 王星阳
Original assignee: HENAN LANXIN TECHNOLOGY CO LTD
Current assignee: HENAN LANXIN TECHNOLOGY CO LTD
Priority date: 2023-07-18
Filing date: 2023-07-18
Publication date: 2024-03-15
Anticipated expiration: 2033-07-18

Abstract

The utility model belongs to the technical field of track circuit detection, and particularly relates to a track circuit detection terminal, which comprises a shell and a circuit board, wherein a circuit is arranged on the circuit board and comprises a main control module, a peripheral circuit and a power module, the peripheral circuit comprises an acquisition module and a communication module, the power module is used for providing power management for the whole track circuit detection terminal, and the acquisition module and the communication module are respectively connected with the main control module; the acquisition module is used for acquiring the voltage and the current of the track, converting the acquired analog signals into digital signals and outputting the digital signals to the main control module; the main control module is used for processing, storing and forwarding sampled data and controlling a power supply of a peripheral circuit so as to realize abnormal restarting; and the main control module uploads the analysis information to the PC through the communication module. The utility model can realize continuous acquisition of the track circuit signals, capture the accidental faults of the track circuit, improve the maintenance work efficiency and effectively ensure the driving safety.

Description

Track circuit detection terminal

Technical Field

The utility model belongs to the technical field of track circuit detection, and particularly relates to a track circuit detection terminal.

Background

The track circuit information in railway construction is taken as an important component of a modern railway, can be taken as a driving command to provide effective basis, and can also monitor the ground track state and the locomotive occupation condition. At present, detection equipment on the market mainly adopts manual operation, single detection can not realize continuous monitoring, and the sporadic faults can not be captured and positioned, so that great economic loss is caused.

Disclosure of Invention

Aiming at the problems in the prior art, the utility model provides the track circuit detection terminal which can continuously collect track circuit signals, capture accidental faults of the track circuit, improve maintenance work efficiency and effectively ensure driving safety.

In order to achieve the above purpose, the technical scheme adopted is as follows:

the utility model provides a track circuit detection terminal, which comprises a shell and a circuit board arranged in the shell, wherein a circuit is arranged on the circuit board, the circuit comprises a main control module, a peripheral circuit and a power module, the peripheral circuit comprises an acquisition module and a communication module, the power module is used for providing power management for the whole track circuit detection terminal, and the acquisition module and the communication module are respectively connected with the main control module; the acquisition module is used for acquiring the voltage and the current of the track, converting the acquired analog signals into digital signals and outputting the digital signals to the main control module; the main control module is used for processing, storing and forwarding sampled data and controlling a power supply of a peripheral circuit so as to realize abnormal restarting; and the main control module uploads the analysis information to the PC through the communication module.

According to the track circuit detection terminal, the power supply module comprises a battery management module, wherein the battery management module comprises a USB charge-discharge chip, a DC charge interface, a battery interface, a power supply adapter and a rechargeable battery, the DC charge interface and the battery interface are connected with the USB charge-discharge chip, the DC charge interface is connected with the power supply adapter, and the battery interface is connected with the rechargeable battery.

According to the track circuit detection terminal, further, the USB charge-discharge chip adopts a CN3762 chip, and the CN3762 chip is connected with a MOS tube, a fuse, a TVS tube and a 100uF capacitor; the rechargeable battery adopts a 7.4V/6.4A rechargeable lithium battery.

According to the track circuit detection terminal, the power module further comprises a switch circuit, a switch interface, an external switch and a level conversion module, wherein the external switch is connected with the switch circuit through the switch interface, and the switch circuit is respectively connected with the battery interface and the level conversion module; the level conversion module adopts a DC/DC chip.

According to the track circuit detection terminal, the power supply module further comprises a power supply control module, the control end of the power supply control module is connected with the main control module, the power supply input end of the power supply control module is connected with the level conversion module, and the power supply output end of the power supply control module is connected with the peripheral circuit; the power control module adopts A03401 as a power control switch.

According to the track circuit detection terminal, the acquisition module comprises a current and voltage acquisition switch, an operational amplifier module, an ADC sampling module, an isolation module and an acquisition interface, wherein the input end of the current and voltage acquisition switch is connected with the sampling resistor through the acquisition interface, and the output end of the current and voltage acquisition switch is sequentially connected with the operational amplifier module, the ADC sampling module and the isolation module.

According to the track circuit detection terminal, further, the current and voltage acquisition switch adopts a solid-state relay, the acquisition interface adopts a banana panel socket interface, the operational amplifier module adopts an OPA2189 chip, the ADC sampling module adopts an AD7767 chip, and the isolation module adopts a 4-channel isolation chip pi 141E60.

According to the track circuit detection terminal, further, the main control module comprises a processing module, the processing module comprises a main control MCU and an auxiliary control MCU which are connected, and the main control MCU adopts an FET3568 core board; the auxiliary control MCU adopts an STM32F407 chip, and the main control MCU and the auxiliary control MCU are connected with external reset and a watchdog; the main control MCU is also connected with an SD card interface, an external indicator light, a Bluetooth interface, a 4G interface, a debugging interface and a USB interface.

According to the track circuit detection terminal, the main control module further comprises a network module connected with the main control MCU, and the network module adopts a YT8521 chip.

According to the track circuit detection terminal, the communication module further comprises a Bluetooth communication module and a 4G module, and the Bluetooth communication module adopts an HC-08 Bluetooth module.

By adopting the technical scheme, the beneficial effects are that:

the acquisition module of the track circuit detection terminal continuously acquires voltage and current signals of the track, converts the acquired analog signals into digital signals and outputs the digital signals to the main control module, the main control module analyzes and stores data sampled by the ADC, the analyzed amplitude, carrier frequency and low-frequency information are uploaded to the PC in real time through the communication module, the acquired original waveform data are stored, the data can be dumped to the PC through the SD card for detailed analysis work of the upper computer, and the equipment is internally provided with a rechargeable battery and is charged through a DC charging interface. The utility model can realize continuous acquisition of the track circuit signals and capture the accidental faults of the track circuit, thereby not only improving the maintenance work efficiency, but also effectively guaranteeing the driving safety. The utility model follows the principle of fault guiding safety, equipment is only connected into the track when in test, and is disconnected with the track when not in test, so that the influence of equipment faults on track circuit signals is prevented.

Drawings

In order to more clearly illustrate the technical solution of the embodiments of the present utility model, the following description will briefly explain the drawings of the embodiments of the present utility model. Wherein the showings are for the purpose of illustrating some embodiments of the utility model only and not for the purpose of limiting the same.

FIG. 1 is a schematic circuit diagram of a track circuit detection terminal according to an embodiment of the present utility model;

FIG. 2 is a schematic diagram of a power module according to an embodiment of the utility model;

FIG. 3 is a circuit diagram of a USB charge-discharge chip according to an embodiment of the present utility model;

FIG. 4 is a circuit diagram of a power control module according to an embodiment of the utility model

FIG. 5 is a schematic diagram of an acquisition module according to an embodiment of the utility model;

fig. 6 is a schematic diagram of a main control module according to an embodiment of the present utility model.

Detailed Description

An exemplary embodiment of the present utility model will be described more fully hereinafter with reference to the accompanying drawings, in which embodiments of the utility model are shown. Unless defined otherwise, technical or scientific terms used herein should be given the ordinary meaning as understood by one of ordinary skill in the art.

As shown in fig. 1, the track circuit detection terminal of the present embodiment includes a housing and a circuit board built in the housing, on which a circuit is provided; the circuit comprises a main control module, a peripheral circuit and a power module, wherein the peripheral circuit comprises an acquisition module and a communication module, and the acquisition module and the communication module are respectively connected with the main control module.

The power module provides power management for the whole track circuit detection terminal, and as shown in fig. 2, the power module comprises a battery management module, a switch circuit, a switch interface, an external switch, a level conversion module and a power control module. The battery management module realizes battery charge and discharge control, and the battery management module comprises a USB charge and discharge chip, a DC charge interface, a battery interface, a power adapter and a rechargeable battery, wherein the DC charge interface and the battery interface are both connected with the USB charge and discharge chip, the DC charge interface is connected with the power adapter, the battery interface is connected with the rechargeable battery, and the battery interface is a XT30 interface.

Preferably, as shown in fig. 3, the USB charging and discharging chip is a CN3762 chip of the rhyme electronics company, which charges a double lithium battery, the charging voltage is 12V, the charging current is 2A, and the charging time can be reduced according to the use of the battery and can be adjusted to 3A, so that the charging time is less than 10 hours. The design of a protection circuit: the CN3762 chip is connected with the MOS tube, the fuse, the TVS tube and the 100nF capacitor, the MOS tube is used for preventing reverse connection, the self-recovery fuse is used for preventing overcurrent, the TVS tube is used for preventing overvoltage, and in order to prevent pulse interference caused when the power adapter is plugged in and pulled out, the 100uF capacitor is used for filtering.

The rechargeable battery of the embodiment adopts a 7.4V/6.4A rechargeable lithium battery, and the batteries adopt a two-string two-by-two parallel mode, so that the batteries can be adjusted according to actual power consumption or required standby time, and a larger-capacity battery is used.

The external switch is connected with the switch circuit through the switch interface, and the switch circuit is respectively connected with the battery interface and the level conversion module. The switching circuit uses a soft start-up circuit, and the reference CBRT start-up circuit can be adjusted according to input voltage and current; the switch interface uses a Highway 1124-2P white socket interface. The level conversion module is used for converting the output voltage of the battery into the voltage used by the main control module and the peripheral circuit, the battery voltage can be converted into 3.3V, the level conversion module adopts a DC/DC chip, the model is TPS54202DDR, and the device is a synchronous buck DC-DC converter.

The power supply control module mainly realizes low-power design or power-down restarting after the peripheral circuit fails; the control end of the power control module is connected with the main control module, the power input end of the power control module is connected with the level conversion module, and the power output end of the power control module is connected with the peripheral circuit; the power control module adopts a MOS tube to control a power supply, and is designed to use A03401 as a power control switch, as shown in fig. 4, when the switch is closed (VGS=0V), when VDS= -30V, the leakage current ID=250uA; when the switch is on (vgs=3.3v), when id= -3A, the internal resistance is maximum rds=75mΩ, when the peripheral circuit fails, the pin is set low to turn off the power output, after the peripheral circuit is powered off, the pin is set high again, and the peripheral circuit is restarted.

The acquisition module acquires voltage and current signals of the track, and converts the acquired analog signals into digital signals and outputs the digital signals to the main control module. As shown in fig. 5, the collection module includes a current-voltage collection switch, an operational amplifier module, an ADC sampling module, an isolation module and a collection interface, wherein an input end of the current-voltage collection switch is connected with the sampling resistor through the collection interface, and an output end of the current-voltage collection switch is sequentially connected with the operational amplifier module, the ADC sampling module and the isolation module.

The current and voltage acquisition switch adopts a solid-state relay to control a voltage signal or a current signal path of the track circuit, and the withstand voltage of the relay is 1.5KV which is far greater than the voltage acquisition range of 400V; in order to prevent the influence of equipment abnormality on the track circuit, the switch can be closed only when acquisition is needed, and the switch can be opened manually or automatically by equipment abnormality.

The acquisition interface is divided into a voltage acquisition interface and a current acquisition interface, and banana panel socket interfaces are adopted. The operational amplifier module realizes the scaling of the acquired signals, and because the range of the acquired signals is 0-400V, when the amplitude of the input signals is relatively large, the scaling ratio is about 300:1, and when the amplitude of the input signals is relatively small, the scaling ratio is 3:1; in order to keep the original signal of the track circuit collected, a filter circuit is not used, and preferably, an OPA2189 chip of TI company is adopted as the operational amplifier module, and the chip is a high-precision, low-noise, 36V, zero-temperature drift and 14MHz MUX friendly type rail-to-rail output operational amplifier.

The ADC sampling module is used for converting the acquired analog signals into digital signals and outputting the digital signals to the main control module; the ADC sampling module adopts an AD7767 chip, and the device is a 24-Bit, 15 mW and 109 dB,128 kSPS ADC chip. The isolation module realizes the circuit isolation of the acquisition part and the processing part, and adopts a 4-channel isolation chip pi 141E60 of the surge company.

The main control module is used for realizing data processing, storage and forwarding from sampling and controlling the power supply of a peripheral circuit, realizing abnormal restarting, and also realizing abnormal restarting by monitoring the running state of the main control module through a watchdog. As shown in fig. 6, the main control module includes a processing module and a network module, wherein the network module is designed for reservation, and when the bluetooth signal is bad, the information can be sent through the network module, and preferably, the network module adopts a YT8521 chip. The processing module comprises a main control MCU and an auxiliary control MCU, and in order to reduce the interruption of the main control MCU, the other MCU (namely the auxiliary control MCU) is used for receiving signals, buffering the received data and forwarding the data to the main control MCU. Preferably, the main control MCU adopts an FET3568 core board, and the FET3568 is a domestic application processor with high performance, low power consumption and rich functions, which is manufactured by the Rockchip facing AIOT and industrial market. The auxiliary control MCU adopts an STM32F407 chip and is mainly used for receiving and caching data of the acquisition module and sending the data to the main control MCU at regular time.

The main control MCU and the auxiliary control MCU are connected with an external reset and a watchdog, and an independent reset chip SCP803 is used; the main control MCU sets the dog feeding time to 3 minutes through a watchdog, and waits for 3 minutes to reset when the system is abnormal; meanwhile, the main control MCU can control the reset of the auxiliary control MCU through the IO pin.

The main control MCU is also connected with an SD card interface, an external indicator light, a Bluetooth interface, a 4G interface, a debugging interface and a USB interface. The SD card interface can be plugged with an SD card, and the SD card can be conveniently dumped by pulling out the SD card. The USB interface provides USB function, and equipment supports USB, realizes USB communication function, and the USB connector uses TYPE-C connector. The Bluetooth interface, the 4G interface and the debugging interface are respectively a Bluetooth communication module, a 4G module and debugging. External indicator light: the battery power detection monitors the battery voltage through the ADC function of the main control MCU, and indicates the on-off of the battery voltage through 4 indicator lamps (three green lamps and one red lamp), wherein four lamps are fully on, the power is 75% -100%, three lamps are on, the power is 50% -75%, two lamps are on, the power is 25% -50%, one lamp is on (red lamp), the power is 10% -25%, and the power is lower than 10% of the indicator lamps. The equipment supports an operation instruction and a test instruction, when the equipment is started and operates normally, the operation lamp flashes, and when the test is started, the test lamp flashes; the device supports Bluetooth operation and Bluetooth connection indication, and is realized through different flashing states of one indicator lamp. The device supports 4G connection status and 4G transmission status indications, with one indicator light indicating different flashing status.

The communication module comprises a Bluetooth communication module and a 4G module, the data analyzed by the main control module and the working state of the detection terminal are uploaded to the PC through the Bluetooth module or the 4G module, and the 4G module is of a reserved design and can be installed selectively. The Bluetooth communication module adopts an HC-08 (sink) Bluetooth module which supports BLE4.0 protocol, integrates master and slave and supports low power consumption.

The acquisition module continuously acquires the voltage and the current of the track, converts the acquired analog signals into digital signals and transmits the digital signals to the main control module, the main control module analyzes and stores the data sampled by the ADC, the analysis information is uploaded to the PC in real time through the communication module, and the acquired original waveform data is stored. The utility model realizes continuous acquisition of the track circuit signals, captures the accidental faults of the track circuit, and improves the maintenance work efficiency and the safety.

Preferred embodiments for carrying out the utility model have been described in detail hereinabove, but it should be understood that these embodiments are merely illustrative and are not intended to limit the scope, applicability or configuration of the utility model in any way. The scope of the utility model is defined by the appended claims and equivalents thereof. Many modifications and variations of the foregoing embodiments will be apparent to those of ordinary skill in the art in light of the teachings of this utility model, which will fall within the scope of this utility model.

Claims

1. The track circuit detection terminal is characterized by comprising a shell and a circuit board arranged in the shell, wherein a circuit is arranged on the circuit board, the circuit comprises a main control module, a peripheral circuit and a power module, the peripheral circuit comprises an acquisition module and a communication module, the power module is used for providing power management for the whole track circuit detection terminal, and the acquisition module and the communication module are respectively connected with the main control module; the acquisition module is used for acquiring voltage and current of the track, converting the acquired analog signals into digital signals and outputting the digital signals to the main control module, the acquisition module comprises a current and voltage acquisition switch, an operational amplifier module, an ADC sampling module, an isolation module and an acquisition interface, the input end of the current and voltage acquisition switch is connected with the sampling resistor through the acquisition interface, and the output end of the current and voltage acquisition switch is sequentially connected with the operational amplifier module, the ADC sampling module and the isolation module; the main control module is used for processing, storing and forwarding sampled data and controlling a power supply of a peripheral circuit so as to realize abnormal restarting; and the main control module uploads the analysis information to the PC through the communication module.

2. The track circuit detection terminal of claim 1, wherein the power module comprises a battery management module comprising a USB charge-discharge chip, a DC charge interface, a battery interface, a power adapter, and a rechargeable battery, the DC charge interface and the battery interface each being connected to the USB charge-discharge chip, the DC charge interface being connected to the power adapter, the battery interface being connected to the rechargeable battery.

3. The track circuit detection terminal according to claim 2, wherein the USB charge-discharge chip is a CN3762 chip, and the CN3762 chip is connected to a MOS transistor, a fuse, a TVS transistor, and a 100uF capacitor; the rechargeable battery adopts a 7.4V/6.4A rechargeable lithium battery.

4. The track circuit detection terminal of claim 2, wherein the power module further comprises a switch circuit, a switch interface, an external switch and a level shifting module, the external switch being connected to the switch circuit through the switch interface, the switch circuit being connected to the battery interface and the level shifting module, respectively; the level conversion module adopts a DC/DC chip.

5. The track circuit detection terminal of claim 4, wherein the power supply module further comprises a power supply control module, a control end of the power supply control module is connected with the main control module, a power supply input end of the power supply control module is connected with the level conversion module, and a power supply output end of the power supply control module is connected with the peripheral circuit; the power control module adopts A03401 as a power control switch.

6. The track circuit detection terminal of claim 1, wherein the current-voltage acquisition switch employs a solid state relay, the acquisition interface employs a banana panel socket interface, the op-amp module employs an OPA2189 chip, the ADC sampling module employs an AD7767 chip, and the isolation module employs a 4-channel isolation chip pi 141E60.

7. The track circuit detection terminal according to claim 1, wherein the main control module comprises a processing module, the processing module comprises a main control MCU and an auxiliary control MCU which are connected, and the main control MCU adopts an FET3568 core board; the auxiliary control MCU adopts an STM32F407 chip, and the main control MCU and the auxiliary control MCU are connected with external reset and a watchdog; the main control MCU is also connected with an SD card interface, an external indicator light, a Bluetooth interface, a 4G interface, a debugging interface and a USB interface.

8. The track circuit detection terminal of claim 7, wherein the master control module further comprises a network module connected to the master control MCU, the network module employing a YT8521 chip.

9. The track circuit detection terminal of claim 1, wherein the communication module comprises a bluetooth communication module and a 4G module, and the bluetooth communication module is an HC-08 bluetooth module.