Rail train disaster recovery data downloading circuit and rail train

Abstract

The utility model provides a rail train disaster recovery data downloading circuit and a rail train. The rail train disaster recovery data downloading circuit is used for being connected with a USB interface circuit of external USB equipment, a power supply control circuit, a signal switching circuit used for switching data transmission paths and a storage medium, and the power supply control circuit is connected with the USB interface circuit, the signal switching circuit and the storage medium. The signal switching circuit is further connected with the USB interface circuit and the storage medium. According to the utility model, the external USB device can quickly download the state data of the rail train from the storage medium after a disaster accident occurs and under the condition that an internal power supply of the rail train data center cannot supply power, so that the efficiency of rail train disaster accident investigation is improved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to rail transit technical field, concretely relates to a rail train disaster data download circuit and rail train. BACKGROUND

[0002] With the rapid development of rail transit, the industry puts forward higher and higher requirements for the operation safety of rail train, and downloading and analyzing the operation state data of rail train after disaster accidents is the basis for carrying out accident investigation.

[0003] When the rail train is normally operated, the state data of the vehicle-mounted system is stored in the storage medium, when the data needs to be called, the vehicle-mounted data center of the rail train can be directly powered (main power supply) to read the state data from the storage medium and write into the vehicle-mounted data center for online analysis, however, when disaster accidents occur, the vehicle-mounted data center may not be powered, and at the same time, it is inconvenient to disassemble the vehicle-mounted data center to the ground laboratory for analysis due to the need to save the scene, which will greatly reduce the efficiency of the rail train disaster accident investigation. UTILITY MODEL CONTENTS

[0004] The utility model solves the technical problem to provide a rail train disaster data download circuit and rail train to improve the efficiency of the rail train disaster accident investigation.

[0005] The rail train disaster data download circuit provided by the utility model includes a USB interface circuit for connecting external USB equipment, a power supply control circuit, a signal switching circuit for switching data transmission path, and a storage medium, the power supply control circuit is connected with the USB interface circuit, the signal switching circuit and the storage medium respectively, and the signal switching circuit is also connected with the USB interface circuit and the storage medium respectively.

[0006] Preferably, the USB interface circuit includes a USB chip, a USB socket, a diode array, a fuse and a TVS tube, the diode array is connected in parallel between the differential data end of the USB chip and the port of the USB socket, the fuse is connected in series with the power output end of the USB socket, one end of the TVS tube is connected between the fuse and the power output end of the USB socket, the other end of the TVS tube is connected in series with the anode end of the diode array and then grounded, the diode array is composed of fourteen transient voltage suppressors connected in series and then connected in parallel, and the diode array is also connected in parallel with a voltage stabilizing diode.

[0007] Preferably, the power supply control circuit includes a first diode, a second diode, a current limiting resistor and an LED indicator light.

[0008] One end of the current limiting resistor is connected with the cathode end of the first diode and the cathode end of the second diode respectively, the other end of the current limiting resistor is connected with one end of the LED indicator lamp, the other end of the LED indicator lamp is grounded, the anode end of the first diode is connected with the main power supply, the anode end of the second diode is connected with the power output end of the USB socket in the USB interface circuit, and one end of the current limiting resistor is the power output end of the power control circuit.

[0009] Preferably, the signal switching circuit comprises a first signal switching chip, a second signal switching chip, a first capacitor array, a second capacitor array, a first resistor and a second resistor; one end of the first capacitor array is connected with the power input end of the first signal switching chip and the power output end of the power control circuit respectively, the other end of the first capacitor array is grounded, one end of the second capacitor array is connected with the power input end of the second signal switching chip and the power output end of the power control circuit respectively, the other end of the second capacitor array is grounded, one end of the first resistor is connected with the main power supply and the signal input pin of the first signal switching chip respectively, the other end of the first resistor is grounded, one end of the second resistor is connected with the main power supply and the signal input pin of the second signal switching chip respectively, the other end of the second resistor is grounded, the first capacitor array and the second capacitor array are respectively composed of nine capacitors in parallel, the first data input pin of the first signal switching chip is connected with the storage medium, the second data input pin of the second signal switching chip is connected with the storage medium, the first data output pin of the first signal switching chip is connected with the rail train data center, the second data output pin of the first signal switching chip is connected with the USB chip, the third data output pin of the second signal switching chip is connected with the rail train data center, and the fourth data output pin of the second signal switching chip is connected with the USB chip.

[0010] Preferably, the USB socket is a USB Type B interface.

[0011] Preferably, the first signal switching chip and the second signal switching chip are both PI2PCIE2212 chips.

[0012] Preferably, the current limiting resistor is a fixed resistor with a resistance of 1KΩ.

[0013] Preferably, the first resistor and the second resistor are both fixed resistors with a resistance of 10KΩ.

[0014] Preferably, the capacitance of each capacitor in the first capacitor array and the second capacitor array is 0.1uF.

[0015] In the second aspect, the utility model also provides a rail train, the rail train comprises the rail train disaster recovery data download circuit.

[0016] The utility model has the advantages of:

[0017] The rail train disaster recovery data download circuit provided by the utility model is equipped with a power control circuit and a USB interface circuit. When the main power supply fails to supply power, the USB interface circuit can be selected for power supply through the power control circuit. The signal switching circuit provided can switch the data transmission path, read the status data in the storage medium, and transmit it to the external USB device through the signal switching circuit, thereby realizing the rapid downloading of the rail train status data after a disaster accident, which is beneficial to improving the efficiency of rail train disaster accident investigation. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a structural diagram of the rail train disaster recovery data download circuit provided by the utility model;

[0019] Figure 2 This is a schematic diagram of the structure of the USB interface circuit in the present utility model;

[0020] Figure 3 This is a schematic diagram of the structure of the power supply control circuit in the utility model;

[0021] Figure 4 It is a structural diagram of the signal switching circuit in the utility model. DETAILED DESCRIPTION

[0022] like Figure 1 As shown, the present invention includes a USB interface circuit 11 for connecting an external USB device (such as a laptop), a power control circuit 12 , a signal switching circuit 13 for switching a data transmission path, and a storage medium 14 .

[0023] The power control circuit 12 is connected to the USB interface circuit 11 , the signal switching circuit 13 and the storage medium 14 respectively, and the signal switching circuit 13 is also connected to the USB interface circuit 11 and the storage medium 14 respectively.

[0024] Each structure is described in detail below.

[0025] See also Figure 2 Specifically, the USB interface circuit includes a USB chip 21, a USB socket X302, a diode array V301, a fuse F301 and a TVS tube V302.

[0026] It should be noted that the USB socket X302 used in the present invention is a USB Type B interface, which includes a power signal and a USB data signal.

[0027] Among them, the VBUS end of the USB socket X302 (corresponding to pin 1, indicating the power output end) is connected in series with the fuse F301, which can protect the circuit from damage by overcurrent.

[0028] In the utility model, USB chip includes 6 difference data ends, it is respectively indicated as USBD D M, USBD D P, USBD TX M, USBD TX P, USBD RX M, USBD RX P. Among them, USBD D M, USBD D P are connected with the D- end ( corresponding 2 needle foot, indicating negative signal line) of USB socket X302, D+ end ( corresponding 3 needle foot, indicating positive signal line) respectively;USBD TX M, USBD TX P are connected with the StdB SSTX- end ( corresponding 5 needle foot, indicating sending negative signal line) of USB socket X302, StdB SSTX+ end ( corresponding 6 needle foot, indicating sending positive signal line) respectively;USBD RX M, USBD RX P are connected with the StdB SSRX- end ( corresponding 8 needle foot, indicating receiving negative signal line) of USB socket X302, StdB SSRX+ end ( corresponding 6 needle foot, indicating receiving positive signal line) respectively.

[0029] In order to protect USB data line from voltage peak, the utility model also sets up diode array V301 parallelly connected between the difference data end of USB chip and the port of USB socket X302, and the diode array V301 is formed by connecting fourteen transient voltage suppressors (D1, D2, D3, D4, D5, D6, D7, D8, D9, D10, D11, D12, D13, D14) two by two, and then parallelly connecting, and the diode array V301 is also parallelly connected with voltage stabilizing diode D15. Based on the same purpose, the utility model also sets up a TVS tube V302, one end of the TVS tube V302 is connected between the fuse F301 and the power output end of USB socket X302, and the other end of the TVS tube V302 is connected with the anode end of diode array V301 after being connected in series.

[0030] The GND end ( corresponding 4 needle foot) and GND DRAIN end ( corresponding 7 needle foot) of USB socket X302 are all ground ends. The MP1 end and MP2 end of USB socket X302 are used for welding and fixing of USB socket socket and PCB board, and MP1 and MP2 are connected with USB socket metal shell on electrical connection, and are connected with device casing, and play the role of grounding and shielding.

[0031] Please refer to Figure 3 , specifically, the power control circuit includes the first diode V201, the second diode V202, the current-limiting resistor R202 and the LED indicator HL201;

[0032] One end of the current-limiting resistor R202 is connected with the cathode end of the first diode V201 and the cathode end of the second diode V202 respectively, the other end of the current-limiting resistor R202 is connected with one end of the LED indicator HL201, the other end of the LED indicator HL201 is grounded, the anode end of the first diode V201 is connected with the main power supply (the internal power supply of the vehicle data center), the anode end of the second diode V202 is connected with the power output end P5VB of the USB socket in the USB interface circuit, and one end of the current-limiting resistor R202 is the power output end DLP5V of the power control circuit.

[0033] It should be noted that the first diode V201 and the second diode V202 can ensure that the current can only flow in one direction, prevent the current from flowing in the opposite direction between different power supplies, and in the utility model, the models are both SS36. Specifically, when P5V0 has electricity (indicating that the internal power supply of the vehicle data center is normally powered, and the rail train has not occurred a disaster accident), the current is supplied to DLP5V through V201, at this time, if P5VB also has electricity (the external USB device is accessed, and the USB socket starts to supply power), the existence of V202 prevents the current from flowing in the opposite direction from P5VB to P5V0. Similarly, when P5VB has electricity and P5V0 has no electricity (indicating that the internal power supply of the vehicle data center cannot supply power, the rail train has occurred a disaster accident, the external USB device is accessed, and the USB socket starts to supply power), the current is supplied to DLP5V through V202, at this time, if P5V0 has no electricity, the existence of V201 prevents the current from flowing in the opposite direction from P5V0 to P5VB.

[0034] The LED indicator HL201 is used for indicating whether the power output end DLP5V has electricity, in the state of having electricity, the LED indicator HL201 is bright, in the state of having no electricity, the LED indicator HL201 is not bright, and the technical personnel can be helped to judge the circuit fault. In the utility model, the model is RF-GGB190TS-BC-E1.

[0035] The current-limiting resistor R202 is used for limiting the current flowing to the LED indicator HL201, and protecting the LED indicator HL201 from being damaged by excessive current, in the utility model, the current-limiting resistor R202 is configured as a fixed resistor, and the resistance value is 1KΩ.

[0036] It should be noted that the main function of the power control circuit is to supply power from one of the two power supplies (the main power supply P5V0 and the USB socket power supply P5VB), to ensure that the power supplies do not affect each other through the diode, and to display the current power supply state through the LED indicator HL201. Ensure that the device can smoothly transition to the USB socket power supply P5VB when the main power supply P5V0 fails.

[0037] Please refer to Figure 4Specifically, the signal switching circuit comprises a first signal switching chip D451, a second signal switching chip D452, a first capacitor array DC1, a second capacitor array DC2, a first resistor R459 and a second resistor R461.

[0038] In the utility model, the first signal switching chip D451 and the second signal switching chip D452 are all PI2PCIE2212 chips, since the USB chip has 6 data lines, therefore, the utility model adopts two signal switching chips to complete the data transmission function. The first capacitor array DC1 and the second capacitor array DC2 are respectively formed by nine capacitors in parallel, are used for power decoupling, ensure the stability of the power supply and reduce the noise interference, and the capacitance of each capacitor in the first capacitor array DC1 and the second capacitor array DC2 is 0.1 mu F.

[0039] The one end of the first capacitor array DC1 (C470, C471, C472, C473, C474, C475, C476, C477, C478) is respectively connected with the power input end VDD (corresponding to the 3rd, 8th, 9th, 11th, 13th, 19th, 26th, 28th pin) of the first signal switching chip D451 and the power output end DLP5V of the power control circuit, and the other end of the first capacitor array DC1 is grounded.

[0040] The ground end GND (corresponding to the 1st, 10th, 12th, 14th, 20th, 25th, 27th, 29th pin) of the first signal switching chip D451 is grounded, for ensuring the stability of the circuit and the correct function of the chip.

[0041] One end of the first resistor R459 is respectively connected with the main power P5V0 and the signal input pin SEL1 (corresponding to the 2nd pin) of the first signal switching chip D451, the other end of the first resistor R459 is grounded, the first data input pin (corresponding to the 4th, 5th, 6th, 7th pin) of the first signal switching chip D451 is connected with the storage medium, for reading the state data, the first data output pin (corresponding to the 21st, 22nd, 23rd, 24th pin) of the first signal switching chip D451 is connected with the track train data center, under the normal operation condition, the read state data can be transmitted to the track train data center for storage, the second data output pin (corresponding to the 15th, 16th, 17th, 18th pin) of the first signal switching chip D451 is connected with the USB chip, after the disaster accident occurs, the read state data can be transmitted to the external USB equipment.

[0042] One end of the second capacitor array DC2 (C485, C486, C487, C488, C489, C490, C491, C492, C493) is connected with the power input end VDD (corresponding to the 3rd, 8th, 9th, 11th, 13th, 19th, 26th, 28th pin) of the second signal switching chip D452 and the power output end DLP5V of the power control circuit respectively, and the other end of the second capacitor array DC2 is grounded.

[0043] One end of the second resistor R461 is connected with the main power P5V0 and the signal input pin SEL2 (corresponding to the 2nd pin) of the second signal switching chip D452 respectively, and the other end of the second resistor R461 is grounded, the second data input pin (corresponding to the 4th and 5th pin) of the second signal switching chip D452 is connected with the storage medium, the third data output pin (corresponding to the 23rd and 24th pin) of the second signal switching chip D452 is connected with the track train data center, and the fourth data output pin (corresponding to the 17th and 18th pin) of the second signal switching chip D452 is connected with the USB chip.

[0044] In the utility model, the storage medium can be a storage device with protection capability of USB interface (namely containing power supply and USB signal driving).

[0045] In combination Figures 1 to 4 The working principle of the track train disaster data download circuit is as follows:

[0046] When a disaster occurs, the internal power supply of the track train data center cannot supply power, the technician connects the external USB device to the USB socket, at this time, the USB socket inputs current to the power control circuit through P5VB, at this time, P5V0 in the power control circuit is low level, P5VB is high level, the output current of the USB socket flows to DLP5V through V202 and lights the LED indicator, the output current supplies power to the signal switching chip through DLP5V, at this time, the signal input pin of the signal switching chip inputs low level, the signal switching chip transmits the state data read from the storage medium through the data input pin to the external USB device through the data output pin (the second data output pin and the fourth data output pin), and the fast download of the state data is realized, and the efficiency of the track train disaster investigation is improved.

[0047] The utility model also provides a track train, the track train has the track train disaster data download circuit, has the same beneficial effect with the track train disaster data download circuit.

[0048] Those skilled in the art should understand that the above discussion of any embodiment is only intended to be illustrative and is not intended to be limiting to the scope of the present application; the above embodiments or technical features among different embodiments can also be combined, the steps can be implemented in any order, and there are many other changes such as the different aspects of one or more embodiments of the present application as described above, which are not provided in details for the sake of brevity.

[0049] One or more embodiments of the present application are intended to cover all such alternatives, modifications, and variations as fall within the broad scope of the present application. Accordingly, any one of the above-cited examples, or any other unrecited example, can be omitted, modified, or substituted, or any combination of the above-cited examples, or any other unrecited example, can be combined, in any order, and any omission, modification, substitution, or combination of the above-cited examples, or any other unrecited example, that is within the spirit and principle of one or more embodiments of the present application, shall be included within the scope of the present application.

Claims

1. A railway train disaster recovery data download circuit, characterized in that: It includes a USB interface circuit for connecting to an external USB device, a power control circuit, a signal switching circuit for switching data transmission paths, and a storage medium. The power control circuit is respectively connected to the USB interface circuit, the signal switching circuit, and the storage medium. The signal switching circuit is also respectively connected to the USB interface circuit and the storage medium.

2. The rail train disaster recovery data download circuit according to claim 1, characterized in that: The USB interface circuit includes a USB chip, a USB socket, a diode array, a fuse, and a TVS tube. The diode array is connected in parallel between the differential data terminal of the USB chip and the port of the USB socket. The fuse is connected in series with the power output terminal of the USB socket. One end of the TVS tube is connected between the fuse and the power output terminal of the USB socket. The other end of the TVS tube is connected in series with the anode end of the diode array and then grounded. The diode array is composed of fourteen transient voltage suppressors connected in series in pairs and then in parallel. The diode array is also connected in parallel with a voltage regulator diode.

3. The rail train disaster recovery data download circuit according to claim 2, characterized in that: The power control circuit includes a first diode, a second diode, a current limiting resistor and an LED indicator light; One end of the current limiting resistor is connected to the cathode end of the first diode and the cathode end of the second diode respectively, the other end of the current limiting resistor is connected to one end of the LED indicator light, the other end of the LED indicator light is grounded, the anode end of the first diode is connected to the main power supply, the anode end of the second diode is connected to the power output end of the USB socket in the USB interface circuit, and one end of the current limiting resistor is the power output end of the power control circuit.

4. The rail train disaster recovery data download circuit according to claim 3, characterized in that: The signal switching circuit includes a first signal switching chip, a second signal switching chip, a first capacitor array, a second capacitor array, a first resistor and a second resistor; one end of the first capacitor array is respectively connected to the power input end of the first signal switching chip and the power output end of the power control circuit, the other end of the first capacitor array is grounded, one end of the second capacitor array is respectively connected to the power input end of the second signal switching chip and the power output end of the power control circuit, the other end of the second capacitor array is grounded, one end of the first resistor is respectively connected to the main power supply and the signal input pin of the first signal switching chip, the other end of the first resistor is grounded, one end of the second resistor is respectively connected to the main power supply and the signal input pin of the second signal switching chip, the other end of the second resistor is grounded, the first capacitor array and the second capacitor array are respectively composed of nine capacitors connected in parallel, the first data input pin of the first signal switching chip is connected to the storage medium, the second data input pin of the second signal switching chip is connected to the storage medium, the first data output pin of the first signal switching chip is connected to the rail train data center, the second data output pin of the first signal switching chip is connected to the USB chip, the third data output pin of the second signal switching chip is connected to the rail train data center, and the fourth data output pin of the second signal switching chip is connected to the USB chip.

5. The rail train disaster recovery data download circuit according to claim 4, characterized in that: The USB socket is a USB Type B interface.

6. The rail train disaster recovery data download circuit according to claim 5, characterized in that: The first signal switching chip and the second signal switching chip are both PI2PCIE2212 chips.

7. The rail train disaster recovery data download circuit according to claim 6, characterized in that: The current limiting resistor is a fixed resistor with a resistance of 1KΩ.

8. The rail train disaster recovery data download circuit according to claim 7, characterized in that: The first resistor and the second resistor are both fixed resistors, and the resistance value is 10KΩ.

9. The rail train disaster recovery data download circuit according to claim 8, characterized in that: The capacitance value of each capacitor in the first capacitor array and the second capacitor array is 0.1 μF.

10. A rail train, characterized in that: It comprises the rail train disaster recovery data download circuit as described in any one of claims 1-9.

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