A whole vehicle test bench signal acquisition device

Abstract

The utility model provides a whole vehicle test bench signal acquisition device, including the cabinet, the integrated acquisition circuit is in the cabinet, acquisition circuit and test bench test system and test bench data processor, acquisition circuit includes air switch, one end of air switch is connected power, the other end of air switch is connected with power converter, the power converter is away from one end of air switch respectively connected with data collector, bridge repeater and signal input isolator, data collector bridge repeater and signal input isolator are connected between test bench data acquisition system and whole vehicle system, temperature sensor is connected on data collector. The device integrates data collector, bridge repeater, signal input isolator in the same cabinet, reduces the number of external circuit, avoids the disorderly winding of circuit, shortens the time -consuming of connection, improves the test preparation efficiency, speeds up the test preparation progress.

Description

Technical Field

[0001] This utility model belongs to the technical field of auxiliary equipment for vehicle testing, specifically a signal acquisition device for a vehicle test bench. Background Technology

[0002] With the rapid development of automotive electronics technology, vehicle test benches play an increasingly important role in automotive R&D, verification, and production. Test benches need to acquire and process vehicle signals, including CAN bus data, temperature signals, voltage signals, and current signals. However, existing test bench data acquisition systems can only acquire CAN bus signals with a baud rate of 500kHz, while the CAN bus signal input to the vehicle system is 250kHz, leading to system mismatch and preventing direct signal transmission. This necessitates the use of other signal converters for matching. Furthermore, when acquiring temperature signals from the vehicle system, the test bench data acquisition system often connects to the corresponding temperature sensors via multiple transmission lines. Additionally, the number of voltage channels in the test bench's analog input channels is relatively small, while the number of current channels is relatively abundant, meaning that not all voltage signals can be received. This requires connecting voltage signal converters, further increasing the complexity of the wiring during vehicle testing. This results in numerous and disorganized connections between the vehicle system and the test bench data acquisition system. When testing another vehicle system, the wiring needs to be reorganized and checked multiple times, leading to lengthy pre-test wiring connection times and low testing efficiency. Utility Model Content

[0003] To address the problem that multiple auxiliary devices are needed to complete signal acquisition between the vehicle system and the test bench data acquisition system during vehicle testing, resulting in complex and messy wiring, long wiring time, and low testing efficiency, this utility model provides a vehicle test bench signal acquisition device.

[0004] To achieve the above objectives, this utility model provides the following technical solution: This utility model proposes a signal acquisition device for a vehicle test bench, including a cabinet, wherein an acquisition circuit is integrated inside the cabinet, and the acquisition circuit is connected to the test bench acquisition system and the vehicle system. The acquisition circuit includes an air switch, one end of which is connected to a power supply, and the other end of which is connected to a power converter. The end of the power converter away from the air switch is connected to a data acquisition unit, a bridge repeater, and a signal input isolator. The data acquisition unit, the bridge repeater, and the signal input isolator are connected in parallel between the bench data acquisition system and the vehicle system; A temperature sensor is connected to the data acquisition unit.

[0005] Preferably, the temperature sensor includes a retarder inlet water temperature sensor, a retarder inlet water temperature sensor, a radiator inlet water temperature sensor, and a radiator outlet water temperature sensor. The temperature sensor is model PT1000.

[0006] Preferably, the data acquisition unit includes a first data acquisition unit and a second data acquisition unit connected in parallel; The first data acquisition unit is connected to the retarder inlet water temperature sensor and the retarder inlet water temperature sensor; The second data acquisition unit is connected to the radiator inlet water temperature sensor and the radiator outlet water temperature sensor.

[0007] Preferably, the signal input isolator includes a first signal input isolator, a second signal input isolator, and a third signal input isolator connected in parallel; The signal input isolator is model YT-S0-3A2B.

[0008] Preferably, the cabinet is equipped with a cabinet door, and a display screen is connected to the cabinet door. The display screen is connected to the data acquisition unit and the signal input isolator via wires.

[0009] Preferably, the bridge repeater is a CANbridge-Pro model.

[0010] Preferably, the power converter is model RS-100-24.

[0011] Preferably, the cabinet is provided with a clamping assembly; The clamping assembly includes a connecting plate connected to the cabinet. Two mounting plates are arranged parallel to each other at one end of the connecting plate away from the cabinet. A clamping plate is installed between the two mounting plates. A rotating handle is rotatably connected to one end face of the clamping plate. The rotating handle is rotatably mounted on one of the mounting plates.

[0012] Preferably, a shock-absorbing component is provided between the cabinet and the connecting plate; The shock absorption assembly includes a connecting column, one end of which is fixed to the connecting plate, and the other end of which is movably installed in a mounting hole provided on the side wall of the cabinet; a first buffer pad and a second buffer pad are provided on the connecting column; The shock absorption assembly also includes a spring and a damper. One end of the spring and the damper is fixed to the bottom surface of the cabinet, and the other end of the spring and the damper is fixed to the connecting plate.

[0013] Preferably, the first buffer pad and the second buffer pad are rubber pads or airbags.

[0014] Compared with the prior art, the present invention has the following beneficial technical effects: This utility model proposes a signal acquisition device for a vehicle test bench. This device integrates a data acquisition unit, a network bridge repeater, and a signal input isolator into the same cabinet. It connects the bench data acquisition system and the vehicle system through an internal acquisition circuit. Due to the integration of components and the pre-set internal circuit, it is not necessary to build separate wiring between each auxiliary device during use. Only the overall connection between the cabinet, the bench, and the vehicle system needs to be completed. There is no need to connect multiple external auxiliary devices, which greatly reduces the number of external wiring, avoids messy wiring, reduces the difficulty of wiring troubleshooting and maintenance, shortens connection time, improves test preparation efficiency, and speeds up the test preparation process.

[0015] Furthermore, the device is equipped with a clamping assembly on the outside of the cabinet. The clamping assembly can fix the cabinet to the platform to prevent accidental contact by staff, which could cause the device to tip over or move, thus disconnecting it from the platform data acquisition system or the vehicle system.

[0016] Furthermore, this device incorporates springs and buffers between the cabinet and the connecting plate, which reduces the impact of the equipment connected to the clamping components on the integrated acquisition circuitry within the cabinet, creating a stable acquisition environment for the acquisition circuitry and extending the device's service life. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of a vehicle test bench signal acquisition device proposed in this utility model; Figure 2 This is a partial cross-sectional schematic diagram of a signal acquisition device for a vehicle test bench proposed in this utility model; Figure 3 This is a schematic diagram of the layout of the acquisition circuit in the cabinet of a vehicle test bench signal acquisition device proposed in this utility model. Figure 4 This is a schematic diagram of the connection of the acquisition circuit in the signal acquisition device for a vehicle test bench proposed in this utility model; Figure 5 This is a schematic diagram of the connection of the network bridge repeater in the signal acquisition device for a vehicle test bench proposed in this utility model; Figure 6 This is a schematic diagram showing the connection between the data acquisition unit and the temperature sensor in a signal acquisition device for a vehicle test bench proposed in this utility model; Figure 7 A connection diagram of the signal input isolator in a vehicle test bench signal acquisition device proposed for utility model purposes; In the attached diagram: 1. Cabinet body; 2. Cabinet door; 3. Display screen; 4. Connecting plate; 5. Rotating handle; 6. Clamping plate; 7. Shock absorption assembly; 70. Connecting column; 71. First buffer pad; 72. Second buffer pad; 74. Buffer; 75. Spring; 8. Air switch; 9. First data acquisition unit; 10. Second data acquisition unit; 11. First signal input isolator; 12. Second signal input isolator; 13. Third signal input isolator; 14. Power converter; 15. Temperature sensor; 16. Network bridge repeater; 17. First socket; 18. Second socket. Detailed Implementation

[0018] In the following description, only certain exemplary embodiments are briefly described. As those skilled in the art will recognize, the described embodiments can be modified in various ways without departing from the spirit or scope of this invention. Therefore, the drawings and description are considered to be exemplary in nature and not restrictive.

[0019] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0020] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0021] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a communication connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0022] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0023] The embodiments of this utility model will now be described in detail with reference to the accompanying drawings.

[0024] This utility model proposes a signal acquisition device for a vehicle test bench, such as... Figures 1-4 As shown, the system includes a cabinet 1, which integrates a data acquisition circuit. This circuit connects to the bench data acquisition system and the vehicle system. The acquisition circuit includes an air switch 8, one end of which is connected to a power supply, and the other end to a power converter 14. The end of the power converter 14 furthest from the air switch 8 is connected to a data acquisition unit, a bridge repeater 16, and a signal input isolator. The data acquisition unit, bridge repeater, and signal input isolator are connected in parallel between the bench data acquisition system and the vehicle system. Specifically, the CAN1L and CAN1H interfaces of the bridge repeater 16 connect to the vehicle system, and the CAN2L and CAN2H interfaces connect to the vehicle system bench data acquisition system. The -GND interface of the bridge repeater 16 is connected to the negative terminal of the power converter 14, and the +9~26V interface of the bridge repeater 16 is connected to the positive terminal of the power converter 14. Figure 5 As shown, a temperature sensor 15 is connected to the data acquisition unit. In this device, a bridge repeater 16 converts the 250K baud rate CAN bus signal from the vehicle system into a 500K baud rate CAN bus signal that the bench data acquisition system can receive. This allows the bench data acquisition system to stably acquire data from the vehicle system, avoiding data loss and transmission interruptions due to baud rate mismatch, and ensuring stable acquisition of vehicle data. This device integrates the data acquisition unit, bridge repeater 16, and signal input isolator into the same cabinet 1, connecting the bench data acquisition system and the vehicle system through an internal acquisition circuit. This eliminates the need for multiple external auxiliary devices, significantly reducing the number of external lines, avoiding messy wiring, resulting in a more organized connection layout, and reducing the difficulty of wiring troubleshooting and maintenance. When testing another vehicle system, it reduces the time spent on wiring organization and improves test preparation efficiency.

[0025] Preferably, the temperature sensors include a retarder inlet water temperature sensor, a retarder inlet water temperature sensor, a radiator inlet water temperature sensor, and a radiator outlet water temperature sensor; the temperature sensors are model PT1000; the data acquisition unit includes a first data acquisition unit 9 and a second data acquisition unit 10 connected in parallel; the first data acquisition unit 9 is connected to the retarder inlet water temperature sensor and the retarder inlet water temperature sensor; the second data acquisition unit 10 is connected to the radiator inlet water temperature sensor and the radiator outlet water temperature sensor. Specifically, as shown... Figure 6 As shown, interfaces 43 and 44 of the first data acquisition unit 9 are connected to the retarder inlet water temperature sensor; interfaces 45 and 46 of the first data acquisition unit 9 are connected to the retarder outlet water temperature sensor; interfaces CAN_H 27 and CAN_L 28 of the first data acquisition unit 9 are connected to the CAN communication interface of the benchtop data acquisition system; and POWER29 and POWER1 of the first data acquisition unit 9 are connected to the power converter 14. Interfaces 43 and 44 of the first data acquisition unit 10 are connected to the radiator inlet water temperature sensor; interfaces 45 and 46 of the first data acquisition unit 10 are connected to the radiator outlet water temperature sensor; interfaces CAN_H 27 and CAN_L 28 of the first data acquisition unit 9 are connected to the CAN communication interface of the benchtop data acquisition system; and interfaces POWER29 and POWER1 of the first data acquisition unit 9 are connected to the power converter 14. Interface 27 and CAN_L28 are connected to the CAN communication interface of the bench data acquisition system. POWER29 and POWER1 in the first data acquisition unit 9 are connected to the power converter 14. The inlet and outlet water temperature data of the radiator and the retarder are collected by the first data acquisition unit 9 and the second data acquisition unit 10 respectively, and transmitted to the bench data acquisition system. There is no need to build additional distributed circuits, reducing the equipment assembly and debugging time.

[0026] like Figure 4 and Figure 7As shown, the signal input isolator includes a first signal input isolator 11, a second signal input isolator 12, and a third signal input isolator 13 connected in parallel. The first and second interfaces of the first signal input isolator 11 are connected to the vehicle system, and the seventh and eighth interfaces are connected to the bench data acquisition system, forming a voltage signal to current signal conversion circuit. The sixth and fifth interfaces of the first signal input isolator 11 are connected to the vehicle system, and the ninth and tenth interfaces are connected to the bench data acquisition system, forming a voltage signal to current signal conversion circuit. The 11th and 12th interfaces of the signal input isolator 11 are connected to the power converter 14. The connection method of the second signal input isolator 12 and the third signal input isolator 13 is the same as that of the first signal input isolator 11. The first signal input isolator 11, the second signal input isolator 12 and the third signal input isolator 13 provide a signal conversion channel between the vehicle system and the bench data acquisition system, converting the 0-10V vehicle voltage signal into a 4-20mA current signal that the bench data acquisition system can receive, and inputting it into the bench data acquisition system for processing. like Figure 1 As shown, cabinet 1 is equipped with cabinet door 2, and cabinet door 2 is connected to display screen 3. Display screen 3 is connected to data acquisition unit and signal input isolator through wires, and data can be obtained through display screen.

[0027] In this embodiment, the bridge repeater 16 is a CANbridge-Pro; the power converter 14 is an RS-100-24, used to convert 220V AC power to 24V DC power to supply other components in the acquisition circuit; the signal input isolator is a YT-S0-3A2B; and the circuit breaker is a C65D10.

[0028] Preferably, the air switch 8 inside the cabinet 1 is also connected to the first socket 17 and the second socket 18 via wires, reserving a power input interface for integrating other components inside the cabinet 1.

[0029] like Figure 1 and Figure 2 As shown, a clamping assembly is provided on the cabinet 1. The clamping assembly includes a connecting plate 4 connected to the cabinet 1. Two mounting plates are arranged parallel to each other on the end of the connecting plate 4 away from the cabinet 1. A clamping plate 6 is installed between the two mounting plates. A rotating handle 5 is rotatably connected to one end face of the clamping plate 6. The rotating handle 5 is rotatably mounted on one mounting plate. By adjusting the rotating handle 5, the distance between the clamping plate 6 and the other mounting plate is reduced, thus fixing the cabinet 1 on the test bench. This prevents the cabinet 1 from undergoing large displacement due to external forces during use, which could cause the integrated acquisition circuit in the cabinet 1 to disconnect from the data acquisition system on the test bench or the vehicle system, thus affecting the vehicle testing.

[0030] like Figure 1 and Figure 2 As shown, a shock-absorbing assembly 7 is provided between the cabinet 1 and the connecting plate 4. The shock-absorbing assembly 7 includes a connecting column 70, one end of which is fixed to the connecting plate 4, and the other end of which is movably installed in a mounting hole provided on the side wall of the cabinet 1. A first buffer pad 71 and a second buffer pad 72 are provided on the connecting column 70. The first buffer pad 71 and the second buffer pad 72 are rubber pads or airbags. The first buffer pad 71 and the second buffer pad 72 provide shock absorption at the position of the connecting column 70, reducing the impact of external vibration on the internal components of the cabinet 1. The shock-absorbing assembly 7 also includes a spring 73 and a damper 74. One end of the spring 73 and the damper 74 is fixed to the bottom surface of the cabinet 1, and the other end of the spring 73 and the damper 74 is fixed to the connecting plate 4. The combined use of the spring 73 and the damper 74 improves the shock absorption effect, so that after the cabinet 1 is fixed on the platform by the clamping assembly 7, the vibration of the platform can be avoided from affecting the internal components of the cabinet 1.

[0031] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. It will be apparent to those skilled in the art that this utility model is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or basic characteristics of this utility model. Therefore, the embodiments should be considered exemplary and non-limiting in all respects. The scope of this utility model is defined by the appended claims rather than the foregoing description, and thus all variations falling within the meaning and scope of equivalents of the claims are intended to be included within this utility model. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0032] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can be appropriately combined to form other embodiments that can be understood by those skilled in the art. The above content is only for illustrating the technical concept of this utility model and should not be used to limit the scope of protection of this utility model. Any modifications made to the technical solutions based on the technical concept proposed by this utility model shall fall within the scope of protection of the claims of this utility model.

Claims

1. A signal acquisition device for a vehicle test bench, characterized in that, Includes a cabinet (1), which integrates a data acquisition circuit, and the data acquisition circuit is connected to the bench data acquisition system and the vehicle system; The acquisition circuit includes an air switch (8), one end of which is connected to a power supply, and the other end of which is connected to a power converter (14). The end of the power converter (14) away from the air switch (8) is connected to a data acquisition unit, a bridge repeater, and a signal input isolator. The data acquisition unit, the bridge repeater (16), and the signal input isolator are connected in parallel between the bench data acquisition system and the vehicle system; A temperature sensor (15) is connected to the data acquisition unit.

2. The vehicle test bench signal acquisition device according to claim 1, characterized in that, The temperature sensors include a retarder inlet water temperature sensor, a radiator inlet water temperature sensor, and a radiator outlet water temperature sensor. The temperature sensor is model PT1000.

3. The vehicle test bench signal acquisition device according to claim 2, characterized in that, The data acquisition unit includes a first data acquisition unit (9) and a second data acquisition unit (10) connected in parallel. The first data acquisition unit (9) is connected to the retarder inlet water temperature sensor and the retarder inlet water temperature sensor; The radiator inlet water temperature sensor and the radiator outlet water temperature sensor are connected to the second data acquisition unit (10).

4. The vehicle test bench signal acquisition device according to claim 1, characterized in that, The signal input isolator includes a first signal input isolator (11), a second signal input isolator (12), and a third signal input isolator (13) connected in parallel. The signal input isolator is model YT-S0-3A2B.

5. The vehicle test bench signal acquisition device according to claim 1, characterized in that, The cabinet (1) is equipped with a cabinet door (2), and a display screen (3) is connected to the cabinet door (2). The display screen (3) is connected to the data acquisition unit and the signal input isolator through wires.

6. The vehicle test bench signal acquisition device according to claim 1, characterized in that, The model of the bridge repeater (16) is CANbridge-Pro.

7. The vehicle test bench signal acquisition device according to claim 1, characterized in that, The power converter (14) is model RS-100-24.

8. The signal acquisition device for a vehicle test bench according to claim 1, characterized in that, The cabinet (1) is equipped with a clamping assembly; The clamping assembly includes a connecting plate (4) connected to the cabinet (1). Two mounting plates are arranged parallel to each other on one end of the connecting plate (4) away from the cabinet (1). A clamping plate (6) is installed between the two mounting plates. A rotating handle (5) is rotatably connected to one end face of the clamping plate (6). The rotating handle (5) is rotatably mounted on one of the mounting plates.

9. The vehicle test bench signal acquisition device according to claim 8, characterized in that, A shock-absorbing component (7) is provided between the cabinet (1) and the connecting plate (4). The shock absorption assembly (7) includes a connecting column (70), one end of which is fixed to the connecting plate (4), and the other end of which is movably installed in the mounting hole provided on the side wall of the cabinet (1); a first buffer pad (71) and a second buffer pad (72) are provided on the connecting column (70). The shock absorption assembly (7) also includes a spring (73) and a buffer (74). One end of the spring (73) and the buffer (74) is fixed to the bottom surface of the cabinet (1), and the other end of the spring (73) and the buffer (74) is fixed to the connecting plate (4).

10. A signal acquisition device for a vehicle test bench according to claim 9, characterized in that, The first buffer pad (71) and the second buffer pad (72) are rubber pads or airbags.

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