Signal acquisition device for driving test

Abstract

The utility model discloses a signal acquisition device for a driving test, which comprises a shell and a signal acquisition circuit, the signal acquisition circuit is configured to acquire state information of a test vehicle, and the signal acquisition circuit comprises a signal acquisition circuit board installed in the shell. An RTK module, a power supply module, a switching value acquisition module, a CPU module and a communication module are integrated on the signal acquisition circuit board, the power supply module is connected with other modules and is configured to supply power to each module, the RTK module and the switching value acquisition module are both connected with the CPU module, the CPU module is connected with the communication module, and the communication module is connected with an upper computer. The signal acquisition device is simple in structure, and the RTK module, the power supply module, the switching value acquisition module, the CPU module and the communication module are highly integrated on the signal acquisition circuit board, so that the signal acquisition device has the advantages of high integration level, complete productization, small size, reliable function and the like.

Description

Technical Field

[0001] The utility model relates to the technical field of driving test equipment, in particular to a signal collection device used for driving tests. Background Art

[0002] With the development of science and technology, the continuous innovation of integrated circuit design, the localization, intelligence and integration of driver examinations are also constantly improving. However, most of the current examination systems are still modular integration and product integration, which is not conducive to installation or vehicle maintenance. Therefore, this signal acquisition device was developed, which completes the collection of two types of data, test vehicle status information and test vehicle positioning information, at the board level through high integration. Utility Model Content

[0003] The purpose of the utility model is to provide a signal acquisition device for driving test to solve the problems raised in the above background technology.

[0004] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a signal acquisition device for a driving test, comprising a shell and a signal acquisition circuit, the signal acquisition circuit being configured to collect status information of a test vehicle, the signal acquisition circuit comprising a signal acquisition circuit board installed in the shell, the signal acquisition circuit board integrating an RTK module, a power module, a switch quantity acquisition module, a CPU module and a communication module, the power module being connected to other modules and configured to supply power to each module, the RTK module and the switch quantity acquisition module being both connected to the CPU module, and the CPU module being connected to the communication module, and the communication module being connected to a host computer.

[0005] As a further solution of the utility model: the RTK module is internally connected to the CPU module, and the RTK module is externally connected to the four-system full-frequency antenna through a cable, and is configured to obtain satellite signals and base station coordinates, and obtain vehicle positioning and orientation information through an internal RTK algorithm.

[0006] As a further solution of the utility model: the power module includes a power interface and a DCDC regulated power supply, the power interface is connected to an on-board battery via a cable, and the power interface is configured to supply power to the DCDC regulated power supply, the DCDC regulated power supply is two-way, and the two DCDC regulated power supplies respectively supply power to the RTK module and other modules, so that the high-frequency circuit is powered separately from the ordinary circuit.

[0007] As a further solution of the utility model: the switch quantity acquisition module includes a signal interface and a photoelectric isolation circuit, the signal interface is connected to the vehicle-mounted sensor through a cable, and the signal interface transmits the signal to the CPU module through the photoelectric isolation circuit.

[0008] As a further solution of the utility model: the CPU module is a chip integrating a WIFI module and a Bluetooth module, has a built-in large-capacity ROM and SRAM, and is configured to be connected to a host computer via a WIFI module or a Bluetooth module.

[0009] As a further solution of the utility model: the communication module includes a communication interface and a level conversion circuit, the level conversion circuit is connected to the CPU module and is configured to complete the conversion of the output level of the CPU module, the communication interface is connected to the host computer through a cable, and the communication interface is connected to the level conversion circuit.

[0010] As a further solution of the utility model: two satellite antennas are installed on the side wall of the shell, and the satellite antennas are connected to the RTK module and the four-system full-frequency antenna.

[0011] As a further solution of the utility model: a reserved expansion interface is installed on the side wall of the shell.

[0012] Compared with the prior art, the beneficial effect of the utility model is that by highly integrating the RTK module, power module, switch quantity acquisition module, CPU module and communication module on the signal acquisition circuit board, the signal acquisition device has the advantages of high integration, complete productization, small size, reliable functions, etc. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of one side wall of the housing of the utility model;

[0014] Figure 2 It is a schematic diagram of another side wall of the housing of the utility model;

[0015] Figure 3 This is a schematic diagram of the working principle of the signal acquisition device of the utility model;

[0016] In the figure: 1. Signal acquisition circuit; 11. Signal acquisition circuit board; 12. RTK module; 13. Power module; 13-1. Power interface; 13-2. DC-DC regulated power supply; 14. Switching quantity acquisition module; 14-1. Signal interface; 14-2. Photoelectric isolation circuit; 15. CPU module; 16. Communication module; 16-1. Communication interface; 16-2. Level conversion circuit; 2. Housing; 3. Reserved expansion interface; 4. Satellite antenna. DETAILED DESCRIPTION

[0017] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0018] The signal acquisition device collects the vehicle status information and vehicle location information required for the driver's test in real time, and transmits it to the host computer. The signal acquisition device can communicate with the host computer through three methods: serial interface, WIFI and Bluetooth. The signal acquisition device has high integration, complete productization, small size and reliable function.

[0019] See also Figure 1-3 In an embodiment of the utility model, a signal acquisition device for a driving test includes a shell 2 and a signal acquisition circuit 1. The shell 2 is made of aluminum alloy and has a size of 10cm*7cm*4cm. The signal acquisition circuit 1 is configured to collect status information of the test vehicle. The signal acquisition circuit 1 includes a signal acquisition circuit board 11 installed in the shell 2. The signal acquisition circuit board 11 integrates an RTK module 12, a power module 13, a switch quantity acquisition module 14, a CPU module 15 and a communication module 16. The power module 13 is connected to other modules and is configured to supply power to each module. The RTK module 12 and the switch quantity acquisition module 14 are both connected to the CPU module 15, and the CPU module 15 is connected to the communication module 16, and the communication module 16 is connected to the host computer.

[0020] See also Figure 3 In one embodiment, in this embodiment, preferably, the RTK module 12 is internally connected to the CPU module 15, and the RTK module 12 is externally connected to the four-system full-frequency antenna through a cable, and is configured to obtain satellite signals and base station coordinates, and obtain vehicle positioning and orientation information through an internal RTK algorithm. The RTK module group 12 uses the domestic Hexin Starcom chip.

[0021] See also Figure 3 In one embodiment, in this embodiment, preferably, the power module 13 includes a power interface 13-1 and a DC-DC regulated power supply 13-2. The power interface 13-1 is connected to the vehicle battery through a cable, and the power interface 13-1 is configured to supply power to the DC-DC regulated power supply 13-2. The DC-DC regulated power supply 13-2 is two-way, and the two DC-DC regulated power supplies 13-2 respectively supply power to the RTK module 12 and other modules, so that the high-frequency circuit is powered separately from the ordinary circuit to reduce interference.

[0022] See also Figure 3In one embodiment, in this embodiment, preferably, the switch quantity acquisition module 14 includes a signal interface 14-1 and a photoelectric isolation circuit 14-2, the signal interface 14-1 is connected to the vehicle-mounted sensor through a cable, and the signal interface 14-1 transmits the signal to the CPU module 15 through the photoelectric isolation circuit 14-2.

[0023] See also Figure 3 In one embodiment, in this embodiment, preferably, the CPU module 15 is a chip integrating a WIFI module and a Bluetooth module, with a built-in large-capacity ROM and SRAM, and is configured to be connected to the host computer through the WIFI module or the Bluetooth module. The CPU module 15 uses the ESP32-S3 chip of domestic Espressif Technology. The chip uses a 32-bit dual-core processor, integrates WIFI and Bluetooth functions, has a built-in large-capacity ROM and SRAM, is powerful, and has rich interfaces.

[0024] See also Figure 3 In one embodiment, in this embodiment, preferably, the communication module 16 includes a communication interface 16-1 and a level conversion circuit 16-2, the level conversion circuit 16-2 is connected to the CPU module 15, and is configured to complete the conversion of the output level of the CPU module 15, the communication interface 16-1 is connected to the host computer through a cable, and the communication interface 16-1 is connected to the level conversion circuit 16-2.

[0025] See also Figure 2 In one embodiment, in this embodiment, preferably, two satellite antennas 4 are installed on the side wall of the shell 2, and the satellite antennas 4 are connected to the RTK module 12 and the four-system full-frequency antenna.

[0026] See also Figure 1 In one embodiment, in this embodiment, preferably, a side wall of the shell 2 is installed with a reserved expansion interface 3.

[0027] The working principle and use process of the utility model are as follows: when the signal acquisition device is installed and starts working, the status information of the test vehicle, such as engine status, gear status, lighting information, speed, etc., is transmitted to the CPU module 15 through the switch quantity acquisition module 14; the positioning information of the test vehicle is obtained by the RTK module 12 through the four-system full-frequency antenna to obtain the satellite signal, and then the base station coordinates are obtained through the CPU module 15, and the test vehicle positioning and orientation information is obtained through the internal solution of the RTK algorithm. The CPU module 15 can transmit the status information and positioning and orientation information of the test vehicle to the host computer through the communication interface 16-1, WIFI and Bluetooth.

[0028] For example: when candidate A is taking the C1 driver's license subject two test, he gets in the car and prepares to fasten his seat belt, start the engine, shift to first gear, release the handbrake, release the clutch and step on the accelerator to start. At this time, the seat belt signal, ignition signal, engine start signal, gear signal, handbrake signal, and clutch signal are all transmitted to the switch quantity acquisition module 14 through the corresponding sensor voltage changes, and are transmitted to the CPU module 15 after conversion. The CPU module 15 transmits the signal to the host computer, and the host computer determines that the operation of candidate A is correct through the signal changes and the start is qualified.

[0029] Then candidate A starts to take the test of reversing into a parking space. During the test, candidate A drives the test vehicle so that the left side of the vehicle presses against the solid line at the edge. At this time, the RTK module 12 obtains the satellite signal and the base station coordinates, and calculates the positioning and orientation data of the test vehicle through the RTK algorithm, and transmits it to the CPU module 15. The CPU module 15 transmits the data to the host computer, and the host computer determines that the test vehicle presses the line through the real-time positioning data, and the test fails.

[0030] Although this specification is described according to implementation modes, not every implementation mode includes only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

[0031] Therefore, the above description is only a preferred embodiment of the present application and is not intended to limit the scope of implementation of the present application; that is, all equivalent changes made according to the scope of the claims of the present application are within the protection scope of the claims of the present application.

Claims

1. A signal collection device for driving test, characterized in that: The invention comprises a housing (2) and a signal acquisition circuit (1), wherein the signal acquisition circuit (1) is configured to acquire state information of a vehicle test, and the signal acquisition circuit (1) comprises a signal acquisition circuit board (11) installed in the housing (2), and an RTK module (12), a power module (13), a switch quantity acquisition module (14), a CPU module (15) and a communication module (16) are integrated on the signal acquisition circuit board (11), and the power module (13) is connected to other modules and configured to supply power to each module, the RTK module (12) and the switch quantity acquisition module (14) are both connected to the CPU module (15), and the CPU module (15) is connected to the communication module (16), and the communication module (16) is connected to a host computer.

2. The signal acquisition device for driving test according to claim 1, characterized in that: The RTK module (12) is internally connected to the CPU module (15), and the RTK module (12) is externally connected to a four-system full-frequency antenna via a cable, and is configured to obtain satellite signals and base station coordinates, and obtain vehicle positioning and orientation information through an internal RTK algorithm.

3. The signal collection device for driving test according to claim 1, characterized in that: The power module (13) comprises a power interface (13-1) and a DC-DC regulated power supply (13-2); the power interface (13-1) is externally connected to a vehicle battery via a cable, and the power interface (13-1) is configured to supply power to the DC-DC regulated power supply (13-2); the DC-DC regulated power supply (13-2) is two-way, and the two-way DC-DC regulated power supplies (13-2) supply power to the RTK module (12) and other modules respectively, so that the high-frequency circuit is powered separately from the ordinary circuit.

4. The signal collection device for driving test according to claim 1, characterized in that: The switch quantity acquisition module (14) comprises a signal interface (14-1) and a photoelectric isolation circuit (14-2); the signal interface (14-1) is connected to a vehicle-mounted sensor via a cable; and the signal interface (14-1) transmits a signal to a CPU module (15) via the photoelectric isolation circuit (14-2).

5. The signal collection device for driving test according to claim 1, characterized in that: The CPU module (15) is a chip integrating a WIFI module and a Bluetooth module, has a built-in large-capacity ROM and SRAM, and is configured to be connected to a host computer via a WIFI module or a Bluetooth module.

6. The signal collection device for driving test according to claim 1, characterized in that: The communication module (16) comprises a communication interface (16-1) and a level conversion circuit (16-2); the level conversion circuit (16-2) is connected to the CPU module (15) and is configured to complete the conversion of the output level of the CPU module (15); the communication interface (16-1) is connected to the host computer via a cable, and the communication interface (16-1) is connected to the level conversion circuit (16-2).

7. The signal collection device for driving test according to claim 1, characterized in that: Two satellite antennas (4) are installed on the side wall of the housing (2), and the satellite antennas (4) are connected to the RTK module (12) and the four-system full-frequency antenna.

8. The signal collection device for driving test according to claim 1, characterized in that: A reserved expansion interface (3) is installed on the side wall of the housing (2).

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