Intelligent steering wheel function testing tool and testing method thereof

Abstract

The present invention discloses a smart steering wheel function test tool, comprising a power module, a LIN diagnostic test communication protocol, a DTC fault diagnosis display module, analysis and processing software, a smart steering wheel controller, a National Instruments (NI) communication module, an industrial computer, and a smart steering wheel. The analysis and processing software is installed in the industrial computer. The smart steering wheel has built-in current sensors and capacitance sensors, which are connected to the input of the smart steering wheel controller via telecommunication. The output of the smart steering wheel controller is connected to the input of the NI communication module via telecommunication. The output of the NI communication module is connected to the industrial computer via telecommunication. The power module is used to supply power. A method for testing the function of the smart steering wheel is also disclosed. The present invention achieves full data recording and storage, provides data support, facilitates calibration of the IQ value of the smart steering wheel controller, has high test object compatibility, facilitates joint debugging and testing, shortens the development cycle, has a user-friendly and intuitive interface, and is economical and affordable.

Description

Technical Field

[0001] The present invention belongs to the technical field of automobile function testing, and in particular relates to an intelligent steering wheel function testing tool and a testing method thereof. Background Art

[0002] A smart steering wheel is a car steering wheel equipped with a variety of user-friendly features, making steering easier for the driver and enhancing the driving experience. These features include audio control, air conditioning, deviation correction, cruise control, and remote satellite positioning. While people are experiencing these various features, many performance issues with smart steering wheels have also emerged.

[0003] Although automotive sensors are highly accurate and reliable, they can experience unexpected performance instabilities during production and use. In recent years, numerous vehicle recalls have occurred worldwide, many of which are linked to unstable product performance. Smart steering wheels, as core automotive control components, are particularly susceptible to static electricity generated when the driver touches them. This can interfere with central control signals and impact the proper functioning of the central control ECU. If smart steering wheels undergo a calibration test to detect static electricity generated by human touch before leaving the factory, this can improve their anti-static standards. Summary of the Invention

[0004] In response to the problems existing in the prior art, the present invention provides an intelligent steering wheel function testing tool and a testing method thereof. After using the function testing tool and the testing method, the data can be recorded throughout the process and saved in the local industrial computer, which is convenient for calibrating the IQ value of the intelligent steering wheel controller and providing data support. The software system has higher compatibility with the test object, more stable communication performance, more convenient testing, shortened development cycle, more convenient joint debugging, friendly and intuitive interface, and economical and affordable.

[0005] In order to solve the above technical problems, the technical solution adopted by the present invention is:

[0006] Provided is a smart steering wheel function test tool, which includes a power module, a smart steering wheel controller, a LIN signal conversion device, a DTC fault diagnosis display module and a smart steering wheel. The power module is electrically connected to the smart steering wheel controller and the LIN signal conversion device for power supply. The smart steering wheel has built-in current sensors and capacitance sensors. Both the current sensor and the capacitance sensor are telecommunication-connected to the input end of the smart steering wheel controller. The output end of the smart steering wheel controller is telecommunication-connected to the LIN signal conversion device. The LIN signal conversion device parses collected data and transmits it to the DTC fault diagnosis display module.

[0007] In order to solve the technical problem, the present invention further adopts the following technical solutions:

[0008] Furthermore, the LIN signal conversion device includes an NI communication module and an industrial computer. One end of the NI communication module is telecommunication-connected to the output end of the intelligent steering wheel controller, and the other end is communicatively connected to the industrial computer. The industrial computer has built-in data analysis and processing software, and is communicatively connected to the DTC fault diagnosis display module.

[0009] Furthermore, the intelligent steering wheel controller receives the digital signals collected by the current sensor and the capacitance sensor and converts the digital signals into analog signals and sends them to the NI communication module. The NI communication module establishes USB bus communication with the industrial computer and exchanges data with the analysis and processing software. The analog signals are mapped on the analysis and processing software.

[0010] Furthermore, the analysis and processing software is integrated with a LIN diagnostic test communication protocol. The LIN diagnostic test communication protocol prepares configuration files with different node addresses and different LIN communication baud rates according to different test items. By calling the different configuration files, the analysis and processing software automatically runs the test program. The DTC fault diagnosis display module displays the real-time data processed by the analysis and processing software and the program test running status.

[0011] Furthermore, the real-time data processed by the analysis and processing software includes any one or more of IQ data collected by human touch sensing of the steering wheel controller, intelligent steering wheel controller, and diagnostic fault status.

[0012] Furthermore, the DTC fault diagnosis display module includes a current fault diagnosis display module and a historical fault diagnosis display module. The current fault diagnosis display module and the historical fault diagnosis display module use different color samples to distinguish and display the program test running status.

[0013] Furthermore, by triggering the save command of the DTC fault diagnosis display module, the entire recorded data of the current fault diagnosis display module and the historical fault diagnosis display module are saved in the local industrial computer to calibrate the IQ data of the intelligent steering wheel controller.

[0014] Furthermore, the DTC fault diagnosis display module is provided with a communication status flashing indicator light, and the communication status flashing indicator light is used to display the LIN diagnostic test communication status.

[0015] Furthermore, the NI communication module is a LIN communication board with 16 analog inputs, 2 analog outputs, a 200kS / s sampling rate, 32 digital I / Os, 16-bit accuracy, two 32-bit counters / timers, and a compatible USB2.0 connector.

[0016] The present invention also provides a method for testing the function of an intelligent steering wheel, comprising the following steps:

[0017] S1. A human hand touches the smart steering wheel, and the built-in current sensor and capacitance sensor of the smart steering wheel are in a state of collecting induced current and induced capacitance;

[0018] S2, the collected induced current and induced capacitance are sent to the smart steering wheel controller in the form of digital signals, and the smart steering wheel controller receives the digital signals and converts the digital signals into analog signals and sends them to the NI communication module;

[0019] S3, the NI communication module establishes USB bus communication with the industrial computer and communicates with the analysis and processing software on the industrial computer, the analog signal is mapped on the analysis and processing software and the IQ data collected by the human touch sensing of the intelligent steering wheel controller is displayed in real time;

[0020] S4. Repeat steps S1 to S3. During the test, obtain IQ data collected by human hands touching the steering wheel under different groups of people and different temperatures and humidities. Collect the IQ data to calibrate the smart steering wheel function so that the calibrated IQ value meets the requirements of the smart steering wheel.

[0021] The beneficial effects of the present invention are:

[0022] 1. The intelligent steering wheel function test tool of the present invention is developed based on the LabVIEW development platform, using software programming methods such as multithreading, global function variables, and XNET. It communicates with the intelligent steering wheel controller via a LIN communication board, sending commands and uploading collected test data. Using independently developed data analysis software, it displays in real time the IQ data (current and capacitance values) collected by the intelligent steering wheel controller through human touch sensing, as well as the intelligent steering wheel controller's diagnostic fault status. It can fully record and store this data in a local industrial computer, providing data support for facilitating the calibration of the intelligent steering wheel controller's IQ value. The data is stable and reliable.

[0023] Second, the present invention integrates the design of a complete LIN diagnostic test communication protocol. Configuration files with different node addresses and different LIN communication baud rates are prepared according to different test items. By calling different configuration files, the parsing and processing software automatically runs the test program, displays real-time data and program test running status, improves the compatibility of the software system with the test object, makes communication performance more stable, makes testing more convenient, reduces repeated development workload, shortens the development cycle, and saves development costs.

[0024] 3. The present invention adopts modular devices such as NI communication module, power module, intelligent steering wheel controller, industrial computer, current sensor and capacitance sensor, and independently develops special data analysis software based on the LabVIEW development platform. The data analysis software is equipped with a flashing communication status indicator light to intuitively reflect the LIN bus communication status. The interface is friendly and intuitive, stable and reliable, economical and affordable, the software and hardware platform is easy to build, and the joint debugging is more convenient.

[0025] The above description is only an overview of the technical solution of the present invention. In order to more clearly understand the technical means of the present invention and implement it according to the contents of the specification, the following is a detailed description of the preferred embodiments of the present invention with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 This is a hardware architecture diagram of a smart steering wheel function test tool according to the present invention;

[0027] Figure 2 This is a flow chart of a method for testing the function of an intelligent steering wheel according to the present invention; the components in the figure are labeled as follows:

[0028] Power module 1, intelligent steering wheel controller 2, NI communication module 3, industrial computer 4, current sensor 5 and capacitance sensor 6. DETAILED DESCRIPTION

[0029] The following describes the specific embodiments of the present invention through specific examples. Those skilled in the art will readily understand the advantages and benefits of the present invention from the disclosure herein. The present invention may also be implemented in various other forms, i.e., various modifications and variations are possible without departing from the scope of the present invention.

[0030] Example 1

[0031] A smart steering wheel function test tool, such as Figure 1As shown, the functional testing tool includes a power module 1, an intelligent steering wheel controller 2, a LIN signal conversion device, a DTC fault diagnosis display module and an intelligent steering wheel. The power module is electrically connected to the intelligent steering wheel controller 2 and the LIN signal conversion device for power supply. The intelligent steering wheel has a built-in current sensor 5 and a capacitance sensor 6. The current sensor and the capacitance sensor are both telecommunication-connected to the input end of the intelligent steering wheel controller, and the output end of the intelligent steering wheel controller is telecommunication-connected to the LIN signal conversion device. The LIN signal conversion device parses the collected data and transmits it to the DTC fault diagnosis display module.

[0032] The LIN signal conversion device includes an NI communication module 3 and an industrial computer 4. One end of the NI communication module 3 is telecommunication-connected to the output end of the intelligent steering wheel controller, and the other end is communicatively connected to the industrial computer 4. The industrial computer 4 has built-in data analysis and processing software and is communicatively connected to the DTC fault diagnosis and display module.

[0033] The intelligent steering wheel controller receives the digital signals collected by the current sensor and the capacitance sensor and converts the digital signals into analog signals and sends them to the NI communication module. The NI communication module establishes USB bus communication with the industrial computer and communicates data with the analysis and processing software. The analog signals are mapped on the analysis and processing software.

[0034] The analysis and processing software is integrated with a LIN diagnostic test communication protocol. The LIN diagnostic test communication protocol prepares configuration files with different node addresses and different LIN communication baud rates according to different test items. By calling the different configuration files, the analysis and processing software automatically runs the test program. The DTC fault diagnosis display module displays the real-time data processed by the analysis and processing software and the program test running status.

[0035] The real-time data processed by the analysis and processing software includes any one or more of IQ data collected by human touch sensing of the steering wheel controller, intelligent steering wheel controller and diagnosis fault status.

[0036] The DTC fault diagnosis display module includes a current fault diagnosis display module and a historical fault diagnosis display module. The current fault diagnosis display module and the historical fault diagnosis display module use different color samples to distinguish and display the program test running status.

[0037] By triggering the save command of the DTC fault diagnosis display module, the entire recorded data of the current fault diagnosis display module and the historical fault diagnosis display module are saved in the local industrial computer to calibrate the IQ data of the intelligent steering wheel controller.

[0038] The DTC fault diagnosis display module is provided with a communication status flashing indicator light, and the communication status flashing indicator light is used to display the LIN diagnostic test communication status.

[0039] The NI communication module is a LIN communication board with 16 analog inputs, 2 analog outputs, a 200 kS / s sampling rate, 32 digital I / Os, 16-bit accuracy, two 32-bit counters / timers, and a compatible USB 2.0 connector.

[0040] Example 2

[0041] A method for testing the functionality of an intelligent steering wheel, such as Figure 2 As shown, the following steps are included:

[0042] S1. A human hand touches the smart steering wheel, and the built-in current sensor and capacitance sensor of the smart steering wheel are in a state of collecting induced current and induced capacitance;

[0043] S2, the collected induced current and induced capacitance are sent to the smart steering wheel controller in the form of digital signals, and the smart steering wheel controller receives the digital signals and converts the digital signals into analog signals and sends them to the NI communication module;

[0044] S3, the NI communication module establishes USB bus communication with the industrial computer and communicates with the analysis and processing software on the industrial computer, the analog signal is mapped on the analysis and processing software and the IQ data collected by the human touch sensing of the intelligent steering wheel controller is displayed in real time;

[0045] S4. Repeat steps S1 to S3. During the test, obtain IQ data collected by human hands touching the steering wheel under different groups of people and different temperatures and humidities. Collect the IQ data to calibrate the smart steering wheel function so that the calibrated IQ value meets the requirements of the smart steering wheel.

[0046] Example 3

[0047] With the software version upgrade and the new requirements of the R&D department for the test tool, the test tool software of the present invention will also make corresponding functional upgrades, as follows:

[0048] 1. The present invention triggers and captures the occurrence of IQ values ​​exceeding the reasonable range, so that the background color of the corresponding IQ value control will turn into a striking red, and a window will pop up. The window records the trigger time (time deviation within 10Ms), the value of the IQ value exceeding the reasonable range, and the number of occurrences;

[0049] Second, the test tool of the present invention can open and display two test interfaces on the same industrial computer, so that two LIN ports on one USB-LIN can be used simultaneously, saving costs;

[0050] 3. The present invention adds a tab to the interface of the test analysis and processing software. The controls in the tab can display the original LIN messages on the LIN BUS in real time, and can realize the function of recording the original LIN messages in the local industrial computer, further facilitating the tracking and analysis of data.

[0051] The above descriptions are merely embodiments of the present invention and are not intended to limit the patent scope of the present invention. Any equivalent structures made using the contents of the present invention's description and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A smart steering wheel function test tool, characterized by: The functional test tool comprises a power module (1), an intelligent steering wheel controller (2), a LIN signal conversion device, a DTC fault diagnosis display module and an intelligent steering wheel, wherein the power module is electrically connected to the intelligent steering wheel controller (2) and the LIN signal conversion device for power supply, and the intelligent steering wheel has a built-in current sensor (5) and a capacitance sensor (6), wherein the current sensor and the capacitance sensor are both connected to the input end of the intelligent steering wheel controller via telecommunication, and the output end of the intelligent steering wheel controller is connected to the LIN signal conversion device via telecommunication, and the LIN signal conversion device parses the collected data and transmits it to the DTC fault diagnosis display module; The LIN signal conversion device comprises an NI communication module (3) and an industrial control computer (4), one end of the NI communication module (3) is connected to the output end of the intelligent steering wheel controller by telecommunication, and the other end is connected to the industrial control computer (4) by communication, the industrial control computer (4) has built-in data analysis and processing software, and is connected to the DTC fault diagnosis display module by communication; The intelligent steering wheel controller receives the digital signals collected by the current sensor and the capacitance sensor and converts the digital signals into analog signals and sends them to the NI communication module. The NI communication module establishes USB bus communication with the industrial computer and communicates with the analysis and processing software. The analog signals are mapped on the analysis and processing software. The analysis and processing software is integrated with a LIN diagnostic test communication protocol. The LIN diagnostic test communication protocol prepares configuration files with different node addresses and different LIN communication baud rates according to different test items. By calling the different configuration files, the analysis and processing software automatically runs the test program. The DTC fault diagnosis display module displays the real-time data processed by the analysis and processing software and the program test running status.

2. The intelligent steering wheel function test tool according to claim 1, characterized in that: The real-time data processed by the analysis and processing software includes any one or more of IQ data collected by human touch sensing of the steering wheel controller, intelligent steering wheel controller and diagnosis fault status.

3. The intelligent steering wheel function test tool according to claim 2, characterized in that: The DTC fault diagnosis display module includes a current fault diagnosis display module and a historical fault diagnosis display module. The current fault diagnosis display module and the historical fault diagnosis display module use different color samples to distinguish and display the program test running status.

4. The intelligent steering wheel function test tool according to claim 3, characterized in that: By triggering the save command of the DTC fault diagnosis display module, the entire recorded data of the current fault diagnosis display module and the historical fault diagnosis display module are saved in the local industrial computer to calibrate the IQ data of the intelligent steering wheel controller.

5. The intelligent steering wheel function testing tool according to claim 4, characterized in that: The DTC fault diagnosis display module is provided with a communication status flashing indicator light, and the communication status flashing indicator light is used to display the LIN diagnostic test communication status.

6. The smart steering wheel function testing tool according to any one of claims 1 to 5, characterized in that: The NI communication module is a LIN communication board with 16 analog inputs, 2 analog outputs, a 200 kS / s sampling rate, 32 digital I / Os, 16-bit accuracy, two 32-bit counters / timers, and a compatible USB 2.0 connector.

7. A testing method for a smart steering wheel function testing tool according to any one of claims 1 to 5, characterized in that: The following steps are involved: S1. A human hand touches the smart steering wheel, and the built-in current sensor and capacitance sensor of the smart steering wheel are in a state of collecting induced current and induced capacitance; S2, the collected induced current and induced capacitance are sent to the smart steering wheel controller in the form of digital signals, and the smart steering wheel controller receives the digital signals and converts the digital signals into analog signals and sends them to the NI communication module; S3, the NI communication module establishes USB bus communication with the industrial computer and communicates with the analysis and processing software on the industrial computer, the analog signal is mapped on the analysis and processing software and the IQ data collected by the human touch sensing of the intelligent steering wheel controller is displayed in real time; S4. Repeat steps S1 to S3. During the test, IQ data collected by human hands touching the steering wheel is obtained under different groups of people and different temperatures and humidities.

Images