Dynamic in-situ synchronous test method for torque of vehicle transmission shaft

Abstract

The invention discloses a vehicle transmission shaft torque dynamic in-situ synchronous test method, which comprises the following steps: pasting a strain sensor on a transmission shaft, carrying out parameter calibration through a torque standard machine, reinstalling the transmission shaft on a vehicle, connecting a wireless data acquisition node module, and carrying out control data synchronous acquisition and storage through a gateway. And further analyzing the acquired data to determine the dynamic torque of the transmission shaft under the actual working condition. The dynamic, in-situ and synchronous test of the torque of the multiple transmission shafts of the vehicle is realized by adopting the strain sensor, the wireless data acquisition node, the gateway and special software, the test result can accurately reflect the change condition of the output torque of the vehicle under different working conditions and environments, and the condition that the test bed has a single verification index is avoided.

Description

Technical Field

[0001] The invention belongs to the technical field of vehicle transmission shaft torque testing, and relates to a dynamic in-situ synchronous testing method for vehicle transmission shaft torque. Background Art

[0002] At present, the torque test of vehicle drive shaft is carried out on the test bench, using torque sensor, torque speed sensor, dynamometer and other sensors to measure the torque on the test bench to test whether its performance index meets the requirements of design index. Figure 1 As shown: the test bench system includes a driving motor 1, a torque and speed sensor 2, a test piece installation station 3, and a dynamometer 4. The driving motor provides power for system operation, the torque and speed indication are controlled by the torque and speed sensor, and the dynamometer serves as a load.

[0003] Combination Figure 1 Through analysis, it can be determined that the torque of the drive shaft during the bench test can meet the design index requirements. However, there are many influencing factors after installation, and it is impossible to confirm the torque conditions during the actual operation of the vehicle and the actual torque conditions of the drive shaft. Secondly, the torque and speed sensor cannot be connected to the vehicle for dynamic testing. Summary of the invention

[0004] (I) Purpose of the invention

[0005] The purpose of the present invention is to provide a method for dynamic in-situ synchronous testing of vehicle transmission shaft torque, so as to solve the dynamic synchronous testing of multiple transmission shaft torques during vehicle driving, so as to feedback the torque change of the vehicle under different driving conditions.

[0006] (II) Technical solution

[0007] In order to solve the above technical problems, the present invention provides a dynamic in-situ synchronous testing method for the torque of a vehicle drive shaft. The testing method process is: sticking a strain sensor on the drive shaft, calibrating the parameters through a torque standard machine, reinstalling the drive shaft on the vehicle, connecting a wireless data acquisition node module, and controlling the synchronous acquisition and storage of data through a gateway, and further analyzing the collected data to determine the dynamic torque of the drive shaft under actual working conditions.

[0008] Among them, at the middle section of the transmission shaft, a strain sensor is pasted at an interval of 90°, each of which is 45° to the axis.

[0009] The four attached strain sensors are respectively recorded as sensor 1, sensor 2, sensor 3, and sensor 4, and the angle between any two of the four sensors is 90°.

[0010] Among them, four sensors are connected to form a test bridge circuit, and the bridge circuit structure is a Wheatstone bridge.

[0011] Among them, the four sensors are equivalent to resistor R1, resistor R2, resistor R3, and resistor R4 respectively. Resistors R1, resistor R2, resistor R4, and resistor R3 are connected in sequence end to end. The power supply U0 is connected between the connecting point between resistor R1 and resistor R2 and the connecting point between resistor R4 and resistor R3. The power supply U1 is connected between the connecting point between resistor R2 and resistor R4 and the connecting point between resistor R1 and resistor R3.

[0012] Among them, after completing the pasting of the strain sensor and the layout of the test bridge, the power supply end of the test bridge is connected to the power supply module of the wireless data acquisition node, the power supply module provides power U0 and power U1, and the signal end of the test bridge is connected to the input end of the wireless data acquisition node.

[0013] Among them, the transmission shaft is connected to the torque standard machine for coefficient calibration, and the calibration points are selected according to 20%, 40%, 60%, 80%, and 100% of the design rated torque, so that the transmission shaft torque coefficient is linear.

[0014] Among them, the drive shaft is reinstalled on the vehicle for system debugging, the working status of the sensor and the wireless data acquisition node is determined, and the data of the wireless data acquisition node is obtained through the gateway and transmitted to the display control terminal.

[0015] Among them, the display control terminal analyzes and processes the collected data to obtain the changes in the transmission shaft torque under different working conditions of the vehicle.

[0016] (III) Beneficial effects

[0017] The dynamic in-situ synchronous testing method for vehicle drive shaft torque provided by the above technical solution adopts strain sensors, wireless data acquisition nodes, gateways and special software to realize dynamic, in-situ and synchronous testing of vehicle multi-drive shaft torque. The test results can accurately reflect the changes in the vehicle's output torque under different working conditions and environments, avoiding the situation of a single verification indicator of the test bench. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a structural schematic diagram of a rack system in the prior art.

[0019] Figure 2 This is a schematic diagram of the testing method according to an embodiment of the present invention.

[0020] Figure 3 Schematic diagram of the transmission shaft.

[0021] Figure 4 This is the unfolded diagram of the transmission shaft.

[0022] Figure 5 Schematic diagram of the test bridge.

[0023] Figure 6 This is a schematic diagram of the connection between the test bridge circuit and the power supply module.

[0024] Figure 7 To display the control terminal control schematic diagram. DETAILED DESCRIPTION

[0025] In order to make the purpose, content and advantages of the present invention more clear, the specific implementation methods of the present invention are further described in detail below in conjunction with the drawings and examples.

[0026] Reference Figure 2 As shown, the process of the dynamic in-situ synchronous test method for the vehicle drive shaft torque of this embodiment is: sticking a strain sensor on the drive shaft, calibrating the parameters through a torque standard machine, reinstalling the drive shaft on the vehicle, connecting the wireless data acquisition node module, controlling the data synchronous acquisition and storage through the gateway, and further analyzing the collected data to determine the dynamic torque of the drive shaft in actual working conditions.

[0027] like Figure 3 , Figure 4 As shown, at the middle section of the transmission shaft, a strain sensor is attached at 90° intervals, each of which is 45° to the axis. The four attached strain sensors are respectively recorded as sensor 1, sensor 2, sensor 3, and sensor 4, and the angle between any two of the four sensors is 90°.

[0028] Four sensors are connected to form a test bridge circuit, and the bridge circuit structure is a Wheatstone bridge, such as Figure 5 As shown. The four sensors are equivalent to resistors R1, R2, R3 and R4 respectively. Resistors R1, R2, R4 and R3 are connected in sequence. The connection point between resistors R1 and R2 and the connection point between resistors R4 and R3 are connected to power supply U0. The connection point between resistors R2 and R4 and the connection point between resistors R1 and R3 are connected to power supply U1.

[0029] After the strain sensor is pasted and the test bridge is arranged, the power supply end of the test bridge is connected to the power supply module of the wireless data acquisition node. The power supply module provides power U0 and power U1. The signal end of the test bridge is connected to the input end of the wireless data acquisition node. The connection method is shown in Figure 6 shown.

[0030] The transmission shaft is connected to a torque standard machine for coefficient calibration, and the calibration points are selected according to 20%, 40%, 60%, 80%, and 100% of the design rated torque, so that the transmission shaft torque coefficient is linear.

[0031] Reinstall the drive shaft on the vehicle for system debugging, determine the working status of the sensor and wireless data acquisition node, obtain the data of the wireless data acquisition node through the gateway and transmit it to the display control terminal. See the control principle diagram for details. Figure 7 As shown, the display control terminal analyzes and processes the collected data to obtain the change of the transmission shaft torque under different working conditions of the whole vehicle. The present invention can perform driving tests under different working conditions to collect and store data.

[0032] The test method of this embodiment is applied to the dynamic in-situ synchronous test of the torque of multiple drive shafts of a vehicle, and mainly realizes dynamic, in-situ and synchronous testing through strain sensors, wireless data acquisition nodes and gateways; the drive shaft is connected to a torque standard machine for coefficient calibration to ensure that the torque parameters of the drive shaft are accurate and reliable.

[0033] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A dynamic in-situ synchronous testing method for vehicle transmission shaft torque, characterized in that: The test method process is as follows: stick the strain sensor on the drive shaft, calibrate the parameters through the torque standard machine, then reinstall the drive shaft on the vehicle, connect the wireless data acquisition node module, control the data synchronous acquisition and storage through the gateway, further analyze the collected data, and determine the actual working condition dynamic torque of the drive shaft.

2. The vehicle transmission shaft torque dynamic in-situ synchronous testing method according to claim 1, characterized in that: At the middle section of the transmission shaft, a strain sensor is attached at an interval of 90°, each at an angle of 45° to the axis.

3. The vehicle transmission shaft torque dynamic in-situ synchronous testing method according to claim 2, characterized in that: The four attached strain sensors are respectively recorded as sensor 1, sensor 2, sensor 3, and sensor 4, and the angle between any two of the four sensors is 90°.

4. The vehicle transmission shaft torque dynamic in-situ synchronous testing method according to claim 3, characterized in that: Four sensors are connected to form a test bridge circuit, and the bridge circuit structure is a Wheatstone bridge.

5. The vehicle transmission shaft torque dynamic in-situ synchronous testing method according to claim 4, characterized in that: The four sensors are equivalent to resistor R1, resistor R2, resistor R3, and resistor R4 respectively. Resistors R1, R2, R4, and R3 are connected end to end in sequence. Power supply U0 is connected between the connecting point between resistor R1 and resistor R2 and the connecting point between resistor R4 and resistor R3. Power supply U1 is connected between the connecting point between resistor R2 and resistor R4 and the connecting point between resistor R1 and resistor R3.

6. The vehicle transmission shaft torque dynamic in-situ synchronous testing method according to claim 5, characterized in that: After the strain sensor is pasted and the test bridge is arranged, the power supply end of the test bridge is connected to the power supply module of the wireless data acquisition node. The power supply module provides power U0 and power U1. The signal end of the test bridge is connected to the input end of the wireless data acquisition node.

7. The vehicle transmission shaft torque dynamic in-situ synchronous testing method according to claim 6, characterized in that: The transmission shaft is connected to a torque standard machine for coefficient calibration, and the calibration points are selected according to 20%, 40%, 60%, 80%, and 100% of the design rated torque, so that the transmission shaft torque coefficient is linear.

8. The vehicle transmission shaft torque dynamic in-situ synchronous testing method according to claim 7, characterized in that: Reinstall the drive shaft onto the vehicle for system debugging, determine the working status of the sensor and wireless data acquisition node, obtain the data of the wireless data acquisition node through the gateway and transmit it to the display control terminal.

9. The vehicle transmission shaft torque dynamic in-situ synchronous testing method according to claim 8, characterized in that: The display control terminal analyzes and processes the collected data to obtain the changes in the transmission shaft torque under different working conditions of the vehicle.

10. An application of the vehicle transmission shaft torque dynamic in-situ synchronous testing method according to any one of claims 1 to 9 in the field of vehicle transmission shaft torque testing technology.

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