Wheel speed information interaction device

Abstract

The embodiment of the utility model provides a wheel speed information interaction device, and relates to the technical field of sensors. The wheel speed information interaction device comprises N data channels, N is an integer greater than or equal to 1, and the N data channels comprise a first data channel; when the first data channel is connected to a wheel speed sensor, the first data channel supplies power to the wheel speed sensor and receives first wheel speed information sent by the wheel speed sensor. According to the utility model, the wheel speed information can be received when the wheel speed sensor is connected, the power supply function can be realized, the functions are abundant, and furthermore, the device is more adaptive to the wheel speed sensor powered by an ECU, is more suitable for a real working scene, and guarantees the effective and reliable operation of the wheel speed sensor.

Description

Technical Field

[0001] The utility model relates to the technical field of sensors, in particular to a wheel speed information interaction device, a test system and a data acquisition system. Background Art

[0002] The electronic control units (ECUs) and onboard sensors (such as lidars, cameras, and wheel speed sensors) used in vehicles must all be tested. For example, during the development of ECUs and their algorithms, simulation boards are often used to simulate these sensors. When the simulation boards communicate with the ECU, they simulate real-world sensor-ECU communication, enabling verification, testing, or training of the ECU and its algorithms. In these cases, wheel speed information exchange devices are often used to enable interactive communication of sensor information (such as wheel speed data).

[0003] Taking the wheel speed data of the wheel speed sensor as an example, the existing wheel speed data interaction device can only send sensor information, such as sending the wheel speed data to the ECU to test the ECU; it can be seen that the existing wheel speed information interaction device (such as the wheel speed data interaction device) can only send sensor information and has a single function. Utility Model Content

[0004] The purpose of the utility model is to provide a wheel speed information interaction device and a test system, and a data acquisition system, wherein the wheel speed information interaction device can receive wheel speed information when connected to a wheel speed sensor, and can also realize the power supply function, with rich functions. Furthermore, it is more suitable for wheel speed sensors powered by an ECU, more in line with real working scenarios, and ensures the effective and reliable operation of the wheel speed sensor.

[0005] To achieve the above-mentioned objectives, the present invention provides a wheel speed information interaction device, comprising: N data channels, where N is an integer greater than or equal to 1, and the N data channels include a first data channel; when the first data channel is connected to a wheel speed sensor, the first data channel supplies power to the wheel speed sensor and receives first wheel speed information sent by the wheel speed sensor.

[0006] The present utility model also provides a test system, comprising: a data processing unit, and the above-mentioned wheel speed information interaction device; the wheel speed information interaction device is connected to the data processing unit via a communication module; the wheel speed information interaction device is connected to the target ECU via the second data channel; the second wheel speed information includes at least one of the following: pre-stored wheel speed information, which is wheel speed information pre-stored in the data processing unit or a storage device connected to the data processing unit; simulated wheel speed information, which is wheel speed information simulated and calculated by a processing module in the data processing unit or the wheel speed information interaction device; test bench wheel speed information, which is the first wheel speed information detected by the wheel speed sensor when the mechanical structure of the test bench is operating; the data processing unit is used to use the second wheel speed information obtained through the wheel speed information interaction device as a test basis for the target ECU.

[0007] The present utility model also provides a test system, comprising: a data processing unit, and the above-mentioned wheel speed information interaction device; the wheel speed information interaction device is connected to the data processing unit via a communication module; the wheel speed information interaction device is connected to the wheel speed sensor via the first data channel; the data processing unit is used to obtain the first wheel speed information through the wheel speed information interaction device as a test basis for the wheel speed sensor.

[0008] The present utility model also provides a data acquisition system, comprising: a data processing unit, and the above-mentioned wheel speed information interaction device; the wheel speed information interaction device is connected to the data processing unit via a communication module; the wheel speed information interaction device is connected to the wheel speed sensor via the first data channel; the data processing unit is used to obtain the first wheel speed information through the wheel speed information interaction device, and perform preset processing on the first wheel speed information; the preset processing includes at least one of the following: storing part or all of the first wheel speed information; visualizing part or all of the first wheel speed information; analyzing part or all of the first wheel speed information.

[0009] In one embodiment, the N data channels include a second data channel; when the second data channel is connected to a target ECU, the second data channel sends second wheel speed information to the target ECU.

[0010] In one embodiment, the first data channel includes: a terminal, a power supply module and a current detection module; the terminal is used to connect to a wheel speed sensor; the power supply module is used to power the wheel speed sensor through the terminal; the current detection module is used to detect a target current, and when the terminal is connected to the wheel speed sensor, the target current represents the first wheel speed information.

[0011] In one embodiment, the second data channel includes: a terminal and a current control module; the terminal is used to connect to a target ECU; the current control module is used to control the current flowing through the terminal to form a current signal representing the second wheel speed information to be sent to the target ECU.

[0012] In one embodiment, some or all of the N data channels are target data channels. For the target data channels, the first data channel and the second data channel are different states of the target data channels. The target data channels include: a first terminal, a second terminal, a current detection module, a power supply module, a first switch circuit, a second switch circuit, and a current control module; the power supply module is connected to the first switch circuit, and the current control module is connected to the first switch circuit and the second switch circuit respectively; when the first terminal and the second terminal are connected to the wheel speed sensor, the first switch circuit is switched to the power supply module and connected to the first terminal, and the second switch circuit is switched to the second terminal being grounded, and the power supply module supplies power to the wheel speed sensor; the current The detection module is used to detect the target current. When the first terminal and the second terminal are connected to the two ends of the wheel speed sensor, the target current represents the first wheel speed information; when the first terminal and the second terminal are connected to the target ECU, the first switch circuit is switched to the current control module and connected to the first terminal; when the first terminal and the second terminal are connected to the target ECU, the second switch circuit is switched to the current control module and connected to the second terminal, so as to be grounded through the second terminal; or: the current control module is grounded without the second switch circuit and the second terminal; the current control module is used to control the current flowing through the first terminal when connected to the first terminal, so as to form a current signal representing the second wheel speed information to be sent to the target ECU.

[0013] In one embodiment, the first data channel includes: a first terminal, a second terminal, a power supply module, a third switch circuit, a fourth switch circuit, a first resistor, and a second resistor; the first resistor is connected between the third switch circuit and the first terminal; the power supply module is connected to the third switch circuit; the second resistor is connected between the fourth switch circuit and the second terminal; in one case when the first terminal and the second terminal are connected to the wheel speed sensor, the third switch circuit switches to the power supply module and connects to the first terminal through the first resistor to supply power to the wheel speed sensor, and the fourth switch circuit switches to the second terminal and connects to ground without the second resistor; in another case when the first terminal and the second terminal are connected to the wheel speed sensor, the third switch circuit switches to the power supply module and connects to the first terminal without the first resistor to supply power to the wheel speed sensor, and the fourth switch circuit switches to the second terminal and connects to ground through the second resistor; the current detection module is used to detect a target current. When the first terminal and the second terminal are connected to both ends of the wheel speed sensor, the target current represents the first wheel speed information.

[0014] In one embodiment, the second data channel includes: a first terminal, a second terminal and a current control module; the current control module includes: a digital-to-analog converter, a first current control unit, a second current control unit and a fifth switching circuit, the signal output end of the digital-to-analog converter is respectively connected to the first current control unit and the second current control unit, the second current control unit is also grounded, the first current control unit and the second current control unit are also respectively connected to the fifth switching circuit, the fifth switching circuit is also connected to the first terminal, and the first current control unit is also connected to the second terminal; in one case when the first terminal and the second terminal are connected to the target ECU, the fifth switching circuit switches to the second current control unit connected to the first terminal; in another case when the first terminal and the second terminal are connected to the target ECU, the fifth switching circuit switches to the first current control unit connected to the first terminal.

[0015] In one embodiment, the wheel speed information interaction device further includes: a communication module, the communication module being used to connect to an external device; the communication module being used to: receive the second wheel speed information sent by the external device; and / or send the first wheel speed information to the external device.

[0016] In one embodiment, when the wheel speed information interaction device is connected to the target ECU and the wheel speed sensor at the same time, the second wheel speed information sent to the target ECU is derived from the first wheel speed information sent from the wheel speed sensor. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is a schematic diagram of a wheel speed information interaction device according to a first embodiment of the present utility model, wherein the wheel speed information interaction device includes a data channel;

[0018] Figure 2 is a schematic diagram of a wheel speed information interaction device according to a first embodiment of the present utility model, wherein a processing module in the wheel speed information interaction device is connected to multiple data channels;

[0019] Figure 3 is a schematic diagram of a wheel speed information interaction device according to a first embodiment of the present utility model, wherein the wheel speed information interaction device further includes a processing module;

[0020] Figure 4 is a schematic diagram of a wheel speed information interaction device according to a first embodiment of the present utility model, wherein a processing module in the wheel speed information interaction device is connected to multiple data channels;

[0021] Figure 5 is a schematic diagram of a wheel speed information interaction device according to a first embodiment of the present utility model, wherein the wheel speed information interaction device includes a plurality of processing modules;

[0022] Figure 6 This is a schematic diagram of the data channel of the wheel speed information interaction device according to the first embodiment of the present utility model being used in data collection;

[0023] Figure 7 This is a schematic diagram of the application of the data channel of the wheel speed information interaction device in the first embodiment of the present utility model when performing data injection to the target ECU;

[0024] Figure 8 This is a schematic diagram of the application of the data channel of the wheel speed information interaction device in the first embodiment of the present invention to perform HIL hardware-in-the-loop testing on a target ECU;

[0025] Figure 9 This is a schematic diagram of a data channel of the wheel speed information interaction device according to the first embodiment of the present utility model being connected as a bypass between the ECU and the sensor;

[0026] Figure 10 This is a schematic diagram of the application of the data channel of the wheel speed information interaction device in the first embodiment of the present utility model to verify the function of the wheel speed sensor;

[0027] Figure 11A Schematic diagram of the wheel speed information interaction device according to the second embodiment of the present invention using the target data channel to simulate the ECU;

[0028] Figure 11BThis is a schematic diagram of a wheel speed information interaction device according to the second embodiment of the present invention using a target data channel to simulate a sensor;

[0029] Figure 12A This is a schematic diagram of the wheel speed information interaction device according to the second embodiment of the present invention, wherein the ECU configured with a pull-up resistor is connected to the wheel speed sensor using a target data channel simulation;

[0030] Figure 12B This is a schematic diagram of the wheel speed information interaction device according to the second embodiment of the present invention, wherein the ECU configured with a pull-down resistor is connected to the wheel speed sensor using a target data channel simulation;

[0031] Figure 12C This is another schematic diagram of a wheel speed information interaction device according to the second embodiment of the present invention using a target data channel to simulate a sensor;

[0032] Figure 13A This is a schematic diagram of the wheel speed information interaction device in the second embodiment of the present invention using the first data channel to simulate the connection between the ECU configured with a pull-up resistor and the wheel speed sensor;

[0033] Figure 13B This is a schematic diagram of the wheel speed information interaction device in the second embodiment of the present invention using the first data channel to simulate the ECU configured with a pull-down resistor connected to the wheel speed sensor;

[0034] Figure 14A This is a schematic diagram of a wheel speed information interaction device according to a second embodiment of the present invention, wherein a sensor simulated by a target data channel is connected to a target ECU equipped with a pull-up resistor;

[0035] Figure 14B This is a schematic diagram of a wheel speed information interaction device according to a second embodiment of the present invention, wherein a sensor simulated by a target data channel is connected to a target ECU configured with a pull-down resistor;

[0036] Figure 15A Schematic diagram of a wheel speed information interaction device according to a second embodiment of the present invention, wherein a sensor simulated by a target data channel is connected to a target ECU configured with a pull-up resistor, wherein the wheel speed information interaction device further includes a processing module;

[0037] Figure 15B Schematic diagram of a wheel speed information interaction device according to a second embodiment of the present invention, wherein a sensor simulated by a target data channel is connected to a target ECU configured with a pull-down resistor, wherein the wheel speed information interaction device further includes a processing module;

[0038] Figure 16AThis is a schematic diagram of a wheel speed information interaction device according to a second embodiment of the present invention, wherein a sensor simulated by a second data channel is connected to a target ECU equipped with a pull-up resistor;

[0039] Figure 16B Schematic diagram of a wheel speed information interaction device according to a second embodiment of the present invention, wherein a sensor simulated by a second data channel is connected to a target ECU configured with a pull-down resistor;

[0040] Figure 17A Schematic diagram of a wheel speed information interaction device according to a second embodiment of the present invention, wherein a sensor simulated by a second data channel is connected to a target ECU configured with a pull-up resistor, wherein the wheel speed information interaction device further includes a processing module;

[0041] Figure 17B Schematic diagram of a wheel speed information interaction device according to a second embodiment of the present invention, wherein a sensor simulated by a second data channel is connected to a target ECU configured with a pull-down resistor, wherein the wheel speed information interaction device further includes a processing module;

[0042] Figure 18 This is a specific circuit structure diagram of the wheel speed information interaction device in the second embodiment of the present utility model. DETAILED DESCRIPTION

[0043] The following will be combined with the accompanying drawings to describe in detail the various embodiments of the present invention so that the purpose, features and advantages of the present invention can be more clearly understood. It should be understood that the embodiments shown in the accompanying drawings are not intended to limit the scope of the present invention, but are only intended to illustrate the essential spirit of the technical solution of the present invention.

[0044] In the following description, for the purpose of illustrating the various disclosed embodiments, certain specific details are set forth in order to provide a thorough understanding of the various disclosed embodiments. However, those skilled in the relevant art will recognize that the embodiments may be practiced without one or more of these specific details. In other cases, well-known devices, structures, and techniques associated with this application may not be shown or described in detail to avoid unnecessarily obscuring the description of the embodiments.

[0045] Unless the context requires otherwise, throughout the specification and claims, the word "comprise" and variations such as "include" and "have" should be construed in an open, inclusive sense, that is, should be interpreted to mean "including, but not limited to."

[0046] Reference throughout this specification to "one embodiment" or "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment. Thus, the appearances of "in one embodiment" or "in an embodiment" in various places throughout this specification are not necessarily all referring to the same embodiment. Furthermore, the particular features, structures, or characteristics may be combined in any manner in one or more embodiments.

[0047] As used in this specification and the appended claims, the singular forms "a," "an," and "the" include plural referents unless the context clearly dictates otherwise. It should be noted that the term "or" is generally employed in its sense including "or / and" unless the context clearly dictates otherwise.

[0048] In the following description, in order to clearly demonstrate the structure and working mode of the present invention, many directional words will be used for description, but words such as "front", "back", "left", "right", "outside", "inside", "outward", "inward", "up", and "down" should be understood as convenient terms and should not be understood as restrictive terms.

[0049] It is understood that the terms "first," "second," etc. used in this application may be used herein to describe various elements, data, etc., but these elements, data are not limited by these terms. These terms are only used to distinguish a first element, data from another element, data.

[0050] It should be noted that when an element is considered to be "connected" to another element, it can be directly connected to the other element or connected to the other element through an intervening element. In addition, the "connection" in the following embodiments should be understood as "electrical connection", "communication connection", etc., if there is transmission of electrical signals or data between the connected objects.

[0051] The first embodiment of the present utility model relates to a wheel speed information interaction device. The data channel in the wheel speed information interaction device can receive wheel speed information from a wheel speed sensor, such as by simulating an ECU connected to the wheel speed sensor, and can also send wheel speed information, such as by simulating a wheel speed sensor connected to the ECU, or can be connected between the wheel speed sensor and the ECU (the ECU and the wheel speed sensor are in communication). The wheel speed information interaction device can take the form of a card, a circuit board, a device, or the like.

[0052] It should be noted that this embodiment takes the wheel speed information interaction device for exchanging wheel speed information as an example, but is not limited to this. The wheel speed information interaction device can also be used to exchange other sensor information, such as receiving sensor information sent by the target sensor, or sending sensor information to the target ECU. The target sensor can be understood as any device that can be used for external detection and represents the detection result through sensor information. At the same time, the target sensor also meets the following conditions: using electric current as the transmission medium for sensor information, and: needing to receive power. Furthermore, various sensors that meet this condition can be used as a specific example of the target sensor of this application, such as a pressure sensor, a vehicle speed sensor, a brightness sensor, an oxygen sensor, a temperature sensor, a flow sensor, an angle sensor, etc. This specification mainly uses the wheel speed sensor as an example for explanation.

[0053] Correspondingly, sensor information can refer to any information that represents the detection results of the sensor. It can be transmitted in any form in each transmission link, for example, it can be transmitted in the form of a digital signal, an analog signal, an electric current, or a voltage. As long as the information content transmitted is sensor information, it can be understood as the transmission of sensor information, and the transmission can be understood and described as sending, receiving, acquiring, feedback, etc.

[0054] Please refer to Figure 1 and Figure 2 The wheel speed information interaction device includes: N data channels 10, where N is an integer greater than or equal to 1; in some embodiments, the wheel speed information interaction device further includes: a communication module 20, which can be connected to each data channel 10 through the processing module or directly connected to each data channel 10, and the communication module is also connected to an external device; the external device can be, for example, an industrial computer (such as an RTPC, a real-time machine, etc.), a simulation server, a host computer, or other devices. Figure 1 The number of data channels 10 is 1. Figure 2 The number of the data channels 10 is multiple.

[0055] The N data channels 10 include a first data channel:

[0056] When the first data channel is connected to a wheel speed sensor, it powers the wheel speed sensor and receives first wheel speed information transmitted by the wheel speed sensor. Specifically, since the wheel speed sensor is typically connected to an ECU, the first data channel of the wheel speed information interaction device can be considered to function as a simulated ECU. The first data channel is connected to the wheel speed sensor, powers the wheel speed sensor, and transmits the collected first wheel speed information to the first data channel. For example, the wheel speed sensor represents the first wheel speed information as a change in current between the wheel speed sensor and the first data channel. The first data channel detects the change in current and obtains the current signal representing the first wheel speed information transmitted by the wheel speed sensor.

[0057] In one example, the first data channel includes: a terminal, a power supply module, and a current detection module; the terminal is used to connect to a wheel speed sensor; the power supply module is used to power the wheel speed sensor through the terminal; the current detection module is used to detect a target current, and when the terminal is connected to the wheel speed sensor, the target current represents the first wheel speed information.

[0058] The N data channels 10 include a second data channel:

[0059] When the second data channel is connected to a target ECU, the second data channel transmits the second wheel speed information to the target ECU. Specifically, for an ECU, since it is typically connected to a sensor, the second data channel of the wheel speed information interaction device can be considered to function as a simulated sensor. The second data channel is connected to the target ECU, which can power the wheel speed sensor simulated by the second data channel. The second data channel can transmit the second wheel speed information required for transmission to the target ECU. For example, the second data channel represents the second wheel speed information as a change in current between the second data channel and the target ECU. The target ECU detects the change in current and obtains the current signal representing the second wheel speed information transmitted by the second data channel.

[0060] In one example, the second data channel includes: a terminal and a current control module; the terminal is used to connect to a target ECU; the current control module is used to control the current flowing through the terminal to form a current signal representing the second wheel speed information to be sent to the target ECU.

[0061] The communication module 20 is used to: receive the second wheel speed information sent by an external device; and / or send the first wheel speed information to the external device.

[0062] In some embodiments, the N data channels 10 further include a third data channel, which is connected between the wheel speed sensor and the target ECU. The third data channel can read the first wheel speed information sent by the wheel speed sensor.

[0063] The communication module 20 is configured to receive the second wheel speed information sent by an external device; and / or send the first wheel speed information to the external device.

[0064] The above-mentioned wheel speed information interaction device can be connected to a device with processing capabilities, such as an industrial computer (such as RTPC, real-time machine, etc.), a simulation server, a host computer and other data processing units, and these devices control or configure the data channel so that the data channel can realize the corresponding function.

[0065] In some examples, the wheel speed information interaction device includes a processing module. In this case, the control or configuration of the data channel can be implemented through the processing module so that the data channel can implement corresponding functions, as follows:

[0066] Please refer to Figure 3 The wheel speed information interaction device includes: a data channel 10, a communication module 20 and a processing module 30, wherein the processing module 30 is connected to the data channel 10 and the communication module 20 respectively; please refer to Figure 4 , the number of data channels 10 is multiple, and the processing module 30 is connected to multiple data channels 10; please refer to Figure 5 There are multiple processing modules 30 and multiple data channels 10. Each processing module 30 corresponds to one or more data channels 10. The processing module 30 is connected to the corresponding data channel 10. Figure 5 In the example, each processing module 30 is connected to multiple data channels 10.

[0067] The processing module 30 is used to:

[0068] When the first data channel is connected to the wheel speed sensor, the first data channel is controlled to power the wheel speed sensor and receive the current signal representing the sensing information sent by the wheel speed sensor. Specifically, the wheel speed information interaction device uses the first data channel to simulate the ECU. The first data channel is connected to the wheel speed sensor and is used to power the wheel speed sensor. The wheel speed sensor represents the collected sensing information as a current change between the wheel speed sensor and the first data channel. The first data channel obtains the current signal representing the sensing information sent by the wheel speed sensor by detecting the change in current.

[0069] When the second data channel is connected to a target ECU, the device receives power from the target ECU via the second data channel and transmits a current signal representing sensor information to the target ECU. Specifically, the wheel speed information interaction device utilizes the second data channel to simulate a sensor. The second data channel is connected to the target ECU, which then supplies power to the wheel speed sensor simulated by the second data channel. The second data channel can represent the sensor information to be transmitted to the target ECU as a change in current between the second data channel and the target ECU. The target ECU detects this change in current and obtains a current signal representing the sensor information transmitted by the second data channel.

[0070] Furthermore, the processing module 30 is used to: receive the second wheel speed information sent by the external device through the communication module 20, and control the second data channel to send a current signal representing the second wheel speed information to the target ECU based on the second wheel speed information; and / or, send the current signal representing the first wheel speed information sent by the wheel speed sensor to the external device through the communication module 20.

[0071] In some embodiments, when the wheel speed information interaction device is connected to both a target ECU and a wheel speed sensor, the second wheel speed information transmitted to the target ECU is derived from the first wheel speed information transmitted by the wheel speed sensor. For example, a third data channel is connected between the wheel speed sensor and the target ECU. The third data channel reads a current signal representing the first wheel speed information transmitted by the wheel speed sensor. The processing module 30 transmits the current signal representing the first wheel speed information read by the third data channel to an external device via the communication module 20, and the first wheel speed information is then transmitted to the target ECU via the third data channel.

[0072] Based on the above analysis, it can be seen that regardless of whether the wheel speed information interaction device includes a processing module, a single data channel 10 in the wheel speed information interaction device can be connected to the sensor and / or ECU; that is, the single data channel 10 in the wheel speed information interaction device can be regarded as a simulated ECU and connected to a real sensor. The sensor, such as a wheel speed sensor, can also be regarded as a simulated sensor and connected to a real ECU. Multiple data channels can also be used as bypass connections between the real sensor and the real ECU.

[0073] It should be noted that the first data channel, the second data channel, and the third data channel in this embodiment and the following embodiments may represent three different data channels, at least two of which may also be the same data channel.

[0074] In the wheel speed information interaction device of this embodiment, a single data channel can be used to simulate an ECU or a sensor, or can be used as a bypass connection between the ECU and the sensor, which can be used for a variety of purposes. Several examples are given below. It should be noted that the following takes the wheel speed information interaction device including the processing module as an example, but is not limited to this. It can also be as follows. Figure 1 、 Figure 2 The wheel speed information interaction device shown does not include a processing module, but can also realize the corresponding functions, and the functions of the processing module 30 can be realized by an externally connected device.

[0075] Example 1, data collection: Figure 6 As shown, the wheel speed information interaction device is directly or indirectly mounted on the vehicle. For example, the wheel speed information interaction device is set in a data acquisition system (such as a small data acquisition module, a data processing workstation, a data recorder, etc.). The communication module 20 of the wheel speed information interaction device is connected to the data processing unit of the data acquisition system (such as an industrial computer, which can be a computer, a mainboard, or a combination of a mainboard and multiple circuit boards), and is connected to the actual wheel speed sensor through the data channel 1. Figure 6 Taking the wheel speed sensor of the vehicle as an example, the wheel speed information interaction device uses data channel 1 to simulate the communication between the ECU and the wheel speed sensor. The protocols and specifications followed in the communication between the two can refer to the existing standard protocols of the ECU and the wheel speed sensor, which will not be described in detail here; the wheel speed sensor will regard the wheel speed information interaction device as the ECU, and report the collected wheel speed data to the wheel speed information interaction device through the data channel 1. The processing module 30 of the wheel speed information interaction device will send the wheel speed data detected through the data channel 1 to the data processing part of the data acquisition system through the communication module 20 for storage, or to realize at least one of display and analysis.

[0076] In addition, in this example, since the wheel speed sensor (wheel speed sensor) is a wheel speed sensor installed in the vehicle, the data collected by the wheel speed sensor needs to be sent to the vehicle's own ECU, so that the vehicle's own ECU can perform vehicle control (for example, braking, acceleration, etc.) or other processing based on the wheel speed data of the wheel speed sensor; based on this, the data channel 2 of the wheel speed information interaction device is connected to the vehicle's ECU. At this time, the data channel 2 can be used to simulate the communication between the wheel speed sensor and the vehicle's ECU. The processing module 30 of the wheel speed information interaction device sends the wheel speed data detected through the data channel 1 to the vehicle's ECU through the data channel 2; Figure 6 As shown, the wheel speed data of the wheel speed sensor is sent to the processing module 30 through the data channel 1. The processing module 30 divides the wheel speed data into two paths. The two paths can be the same or different. One path is sent to the data processing unit (such as an industrial computer) and the other path is sent to the vehicle's ECU. It should be noted that Figure 6 The wheel speed information interaction device connects the wheel speed sensor and the vehicle's ECU using two different data channels, but is not limited to this. The wheel speed information interaction device can also use one data channel to connect the wheel speed sensor and the vehicle's ECU to achieve the above process.

[0077] Example 2: Data back injection to target ECU: Figure 7 As shown, for example, a wheel speed information interaction device is provided in a test system for data injection. The communication module 20 of the wheel speed information interaction device is connected to a data processing unit (e.g., an industrial computer and / or a simulation server, etc., where the industrial computer can be a computer, a motherboard, or a combination of a motherboard and other circuit boards). The data channel 3 of the wheel speed information interaction device is connected to a target ECU, which is an ECU under development. A simulated sensor communicates with the target ECU using the data channel 3. Taking the data channel 3 as an example of simulating a wheel speed sensor, the protocols and specifications followed in the communication between the two can refer to the existing standard protocols for ECUs and wheel speed sensors, which are not described in detail here. During the injection process, the industrial computer and / or the simulation server injects the wheel speed data into the target ECU via the data channel 3 to perform verification testing or training on the target ECU. The wheel speed data used for injection can be, for example, real historical wheel speed data collected and stored by a data acquisition system (refer to the data acquisition process of Use 1), i.e., pre-stored wheel speed data, or simulated wheel speed data generated by the simulation server based on a preset simulation model, i.e., simulated wheel speed data.

[0078] Example 3: Perform HIL hardware-in-the-loop testing on the target ECU: Please refer to Figure 8For example, a wheel speed information interaction device is set in the HIL device, and the wheel speed information interaction device is connected to the data processing part (for example, RTPC, which can be a computer, a main board, or a combination of a main board and other circuit boards) in the HIL test system through the communication module 20. The HIL test system is provided with an interaction device to communicate with the target ECU. The wheel speed information interaction device can be understood as an interaction device. The RTPC can communicate with the target ECU through the data channel 4 of the wheel speed information interaction device. The target ECU is the ECU under test; in the process of performing HIL testing on the target ECU, the RTPC generates simulated sensor information (for example, simulated wheel speed data) based on a preset simulation model, and transmits the simulated sensor information to the target ECU. The data is sent to the target ECU through the data channel 4 of the wheel speed information interaction device. The target ECU then generates a control signal that needs to be reported (for example, a signal for controlling braking, acceleration, etc.) based on the simulated sensor information, and reports the control signal to the RTPC through corresponding means (such as the IO channel of the IO board, or a bus network such as Ethernet and CAN). The RTPC then continues to simulate based on the control signal to generate new simulated sensor information. The new simulated sensor information is sent to the target ECU based on a similar process as mentioned above to continue the HIL test; that is, the HIL test system can feed back the simulated sensor information to the real ECU under test (target ECU) through the data channel of the wheel speed information interaction device to realize the HIL test.

[0079] The above description uses the ECU as an example of the object under test for HIL testing, but is not limited to this. In some HIL tests, a real wheel speed sensor (such as a wheel speed sensor) can also be used as the object under test for HIL testing. The wheel speed information interaction device reports the wheel speed data collected by the wheel speed sensor to the RTPC to implement test processing. In addition, in some examples, the wheel speed sensor may also be controllable. For example, a signal input terminal of the wheel speed sensor is directly or indirectly connected to the RTPC (for example, connected to the RTPC through the IO channel of the corresponding IO board). The RTPC can output a control signal to the wheel speed sensor through the signal input terminal, such as controlling the sampling frequency, or actively triggering the collection of sensor information, etc.; the RTPC obtains a new control signal based on the real wheel speed data simulation and sends it to the wheel speed sensor through corresponding means to implement HIL testing.

[0080] In other parts of HIL testing, real ECUs and real sensors are required to participate in HIL testing at the same time, that is, both the target ECU and the wheel speed sensor participate in HIL testing. In this case, the object under test can be the target ECU and / or the wheel speed sensor; for example, the wheel speed sensor is a wheel speed sensor. In this case, the wheel speed sensor is connected to test the wheel speed of the mechanical structure of a test bench, and reports the wheel speed data to the RTPC through the wheel speed information interaction device. The wheel speed information interaction device then sends the wheel speed data to the target ECU. The target ECU obtains a control signal based on the wheel speed data of the wheel speed sensor, and reports the control signal to the RTPC through corresponding means (such as the IO channel of the IO board, or Ethernet, CAN and other bus networks) to realize HIL testing.

[0081] In this part of the HIL test, the wheel speed information interaction device is connected to the target ECU and the wheel speed sensor in the following manner: Figure 9 As shown, data channel 5 and data channel 6 of the wheel speed information interaction device are connected to the target ECU and the wheel speed sensor, respectively. In other examples (not shown), data channel 6 may not be provided, and simulation channel 5 may be connected between the target ECU and the wheel speed sensor. The same simulation channel can be used to achieve communication between the target ECU and the RTPC, and between the RTPC and the wheel speed sensor. Alternatively, there may be two wheel speed information interaction devices, both connected to the RTPC, with one connected to the target ECU via a data channel and the other connected to the wheel speed sensor via a data channel.

[0082] Example 4: Verify the function of the wheel speed sensor. Please refer to Figure 10 The communication module 20 of the wheel speed information interaction device is connected to the host computer, and the data channel 7 of the wheel speed information interaction device is connected to the wheel speed sensor. The wheel speed sensor transmits the acquired sensor information to the wheel speed information interaction device via the data channel 7. The processing module 30 of the wheel speed information interaction device transmits the sensor information to the host computer, which then performs a functional verification test on the wheel speed sensor. For example, the wheel speed sensor is a wheel speed sensor. The wheel speed sensor is placed in a test environment, such as an extreme environment such as high temperature or sub-zero temperature. Alternatively, it is connected to a test bench. In the test environment, the wheel speed sensor collects wheel speed data of the corresponding mechanical structure of the test bench and transmits the wheel speed data to the host computer via the wheel speed information interaction device. The host computer then performs testing and analysis. Compared with Example 1, this example has similar architectures. However, the wheel speed sensor in Example 1 is installed on a vehicle in use. The main purpose of collecting wheel speed data is storage. Even if testing and analysis are required, the analysis is often not specific to the wheel speed sensor. In contrast, in this example, the main purpose is to verify the functionality of the wheel speed sensor itself.

[0083] In this embodiment, the data channel of the wheel speed information interaction device can be connected to a real sensor to simulate the ECU to obtain data collected by the wheel speed sensor; it can also be connected to a real ECU, and when the ECU is not connected to a real wheel speed sensor, the wheel speed information (real data or simulated data) of the wheel speed sensor is sent to the ECU; that is, the data channel of the wheel speed information interaction device can be connected to a real ECU to work and be regarded as a simulated wheel speed sensor, and can also be connected to a real wheel speed sensor to work and be regarded as a simulated ECU, with richer functions; further, when multiple data channels are configured in the wheel speed information interaction device, a single wheel speed information interaction device can be used to connect multiple ECUs and / or multiple sensors, and can adapt to diverse wheel speed information processing needs, such as testing needs, data collection needs, etc.

[0084] The second embodiment of the present utility model relates to a wheel speed information interaction device. Compared with the first embodiment, this embodiment provides a specific implementation method of a data channel in the wheel speed information interaction device.

[0085] Some or all of the N data channels included in the wheel speed information interaction device are target data channels. The first and second data channels can be different states of the same target data channel. A single target data channel can be connected to a real ECU to operate, thereby being considered a simulated sensor, or it can be connected to a real sensor to operate, thereby being considered a simulated ECU. The wheel speed information interaction device may include one or more target data channels. In some examples, all data channels can be target data channels, i.e., they can have both first and second data channel states. In other examples, some data channels may be target data channels, while other data channels may include: data channels that can only implement the first data channel function and thus can only connect to wheel speed sensors; and / or data channels that can only implement the second data channel function and thus can only connect to target ECUs.

[0086] Please refer to Figure 11A The target data channel includes: a current detection module 101, a power supply module 102, a first switch circuit 103, a second switch circuit 104 and a current control module 105; the target data channel has a first terminal WSS_1 and a second terminal WSS_2, and the first terminal WSS_1 and the second terminal WSS_2 are used to connect to the wheel speed sensor and / or the target ECU.

[0087] Please refer to Figure 11BTaking the wheel speed information interaction device also including a processing module 30 as an example, the processing module 30 is respectively connected to the current detection module 101, the current control module 102, the first switch circuit 103 and the second switch circuit 104, and the first switch circuit 103 and the second switch circuit 104 are switched under the control of the processing module 30.

[0088] exist Figure 11A and Figure 11B In the embodiment, the current detection module 101 is connected to the first terminal WSS_1 or the second terminal WSS_2 (the figure takes the current detection module 101 connected to the first terminal WSS_1 as an example), the power supply module 102 is connected to the first switch circuit 103, and the current control module 105 is connected to the first switch circuit 103 and the second switch circuit 104 respectively. The first switch circuit 103 can be a single-pole double-throw switch or a switch array, for example, it can be implemented by a combination of multiple switches connected in series and / or in parallel. The second switch circuit 104 can be a single-pole double-throw switch or a switch array, for example, it can be implemented by a combination of multiple switches connected in series and / or in parallel.

[0089] In this embodiment, taking the first switch circuit 103 and the second switch circuit 104 as single-pole double-throw switches as an example, the common end of the first switch circuit 103 forms the first terminal WSS_1 of the target data channel, one branch end of the first switch circuit 103 is connected to the power supply module 102, and the other branch end of the first switch circuit 103 is connected to the current control module 105; the common end of the second switch circuit 104 forms the second terminal WSS_2 of the target data channel, one branch end of the second switch circuit 104 is grounded, and the other branch end of the second switch circuit 104 is connected to the current control module 105, and the first switch circuit 103 and the second switch circuit 104 are switched by the processing module 30.

[0090] Please refer to Figure 11A When the wheel speed information interaction device is connected to the wheel speed sensor using the target data channel:

[0091] The first terminal WSS_1 and the second terminal WSS_2 of the target data channel are respectively connected to the wheel speed sensor, and the first switch circuit 103 switches to the power supply module 102 and is connected to the first terminal WSS_1; specifically, the common end of the first switch circuit 103 is connected to the branch end connected to the power supply module 102, and at this time the power supply module 102, the first terminal WSS_1 and the wheel speed sensor form a path.

[0092] The second switch circuit 104 switches to grounding the second terminal WSS_2. Specifically, the common terminal of the second switch circuit 104 is connected to the grounded branch terminal. At this time, the wheel speed sensor is grounded through the second terminal WSS_2.

[0093] The current detection module 101 is used to detect the target current. When the first terminal WSS_1 and the second terminal WSS_2 are connected to the two ends of the wheel speed sensor, the target current represents the first wheel speed information. The target current can be the current at the first terminal WSS_1 and / or the second terminal WSS_2, or the current at any suitable target position between the first terminal WSS_1 and the second terminal WSS_2. The target current will be described below using the current of the first terminal WSS_1 as an example, but the present invention is not limited to this.

[0094] Figure 11B and Figure 11A They are roughly the same, the main differences are: Figure 11A There is no limitation on the controlled objects of the first switch circuit 103 and the second switch circuit 104, and they can be, for example, processing modules or external devices directly controlled. Figure 11B When the target data channel is connected to the wheel speed sensor, the processing module 30 can control the first switch circuit 103 to switch to the power supply module 102 and connect to the first terminal WSS_1, and control the second switch circuit 104 to switch to the second terminal WSS_2 and ground.

[0095] As described above, a connection is established between the target data channel and the wheel speed sensor, and power supply module 102 supplies power to the wheel speed sensor. Power supply module 102 is connected to a power source and converts the power supply voltage of the external power source into a power supply voltage that meets the requirements of the wheel speed sensor to power the wheel speed sensor. Power supply module 102 can be, for example, a DC / DC converter, or alternatively, an LDO low-dropout linear regulator, which can achieve higher voltage accuracy. It should be noted that if the power supply voltage of the external power source already meets the power supply requirements of the wheel speed sensor, there is no need for the additional power supply module 102. In other words, the external power source can be directly connected to the first switching circuit 103, and the wheel speed sensor can be powered via the first terminal WSS_1.

[0096] When the wheel speed sensor needs to report the first wheel speed information to the ECU simulated by the target data channel of the wheel speed information interaction device, the current at the first terminal WSS_1 is controlled to change based on the first wheel speed information to be reported, and the current value passing through the first terminal WSS_1 is used as the current signal representing the first sensing signal. In other words, the current signal is the carrier of the first wheel speed information, which can be the current value at a certain moment or include multiple current values within a period of time; the current detection module 101 detects the current at the first terminal WSS_1, Figure 11AIn one possible example, the current detection module 101 sends the detected current detection result to the external device. The current detection result is the current value detected by the current detection module 101 at each moment. The current value in the current detection result obtained by the external device is equivalent to obtaining a current signal used to characterize the first wheel speed information. The current signal can be a current value or a collection of current values formed in chronological order; the external device can parse the first wheel speed information based on the current signal; furthermore, the sending of the current detection result (or current value, current signal) can be understood as the sending of the first wheel speed information.

[0097] exist Figure 11B In the example, the current detection module 101 sends the detected current detection result (e.g., the current value) to the processing module 30. The processing module 30 can obtain the current value detected by the current detection module 101 in real time, which is equivalent to obtaining the current signal used to represent the first wheel speed information. The current signal can be a single current value or a collection of current values formed in a chronological order. The processing module 30 can only record the current signal and send it to the external device via the communication module 20. The external device then parses the current signal to obtain the first wheel speed information reported by the wheel speed sensor. The processing module 30 can send the current signal to the external device in the following ways: the processing module 30 sends a current value to the external device upon receiving it, or the processing module 30 stores several current values after receiving them and then sends them to the external device when needed.

[0098] In addition, the processing module 30 may also obtain the first wheel speed information based on the current value (ie, the current signal) detected by the current detection module 101 , and then report the first wheel speed information to an external device.

[0099] It should be noted that in the present application, the type of the first sensor signal transmitted to the external device can be a digital signal on a bus (CAN / LIN / ETHERNET / FLEXRAY, etc.) or a current signal. The current signal includes several current values, and the current value in the current signal also includes two forms: one is to use 0 or 1 represented by the high and low current values detected by the current detection module 101 as the current signal, where the digital quantity is used as the current signal to transmit the first wheel speed information; the other is to use the numerical value of the current value detected by the current detection module 101 as the current signal, that is, the size of the analog current value is used as the current signal to transmit the first wheel speed information, for example, the numerical value of the current value is used to represent the wheel speed.

[0100] Please refer to Figure 11A , when the wheel speed information interaction device uses the target data channel to simulate the sensor:

[0101] The first terminal WSS_1 and the second terminal WSS_2 of the target data channel are respectively connected to the target ECU, and the first switch circuit 103 switches to the current control module 105 and is connected to the first terminal WSS_1; specifically, the common end of the first switch circuit 103 is connected to the branch end connected to the current control module 105, and at this time the current control module 105 is connected to the target ECU through the first terminal WSS_1.

[0102] The second switch circuit 104 switches to connect the current control module 105 to the second terminal WSS_2, thereby grounding through the second terminal WSS_2. Alternatively, the current control module 105 is grounded without passing through the second switch circuit 104 or the second terminal WSS_2. Specifically, the common terminal of the second switch circuit 104 is electrically connected to the branch terminal connected to the current control module 105. In this case, the current control module 105 is grounded through the target ECU, or the current control module 105 is connected to the internal ground terminal of the wheel speed information interaction device without passing through the second switch circuit 104 or the second terminal WSS_2.

[0103] The current control module 101 is configured to control the current flowing through the first terminal WSS_1 when connected to the first terminal WSS_1 , so as to form a current signal representing the second wheel speed information to be sent to the target ECU through the current change at the first terminal WSS_1 .

[0104] Figure 11B and Figure 11A They are roughly the same, the main differences are: Figure 11A The first switch circuit 103 and the second switch circuit 104 can be controlled and switched by an external device connected to the wheel speed information interaction device. Figure 11B When the target data channel simulates the sensor, the processing module 30 controls the first switch circuit 103 to switch to the current control module 105 connected to the first terminal WSS_1, and the second switch circuit 104 to switch to the current control module 105 connected to the second terminal WSS_2.

[0105] As described above, a connection is established between the target data channel and the target ECU. The current control module 105 in the target data channel receives power from the target ECU. The target data channel controls the current flowing through the first terminal WSS_1 to produce corresponding changes based on the second wheel speed information to be sent (historical real wheel speed information or simulated wheel speed information). The current value passing through the first terminal WSS_1 is used as the current signal representing the second wheel speed information to be sent to the target ECU. The current signal can be detected by the upper sampling resistor or the lower sampling resistor in the target ECU, so that the target ECU can obtain the second wheel speed information sent by the target data channel based on the detected current signal.

[0106] Among them, the current detection module 101 in the target data channel can be configured whether to perform current detection. When the current detection module 101 is configured to perform current detection, the current detection module 101 can detect the current at the first terminal WSS_1 and send it to the external device or processing module 30. The current at the first terminal WSS_1 is controlled by the current control module 105. The external device or processing module 30 can determine whether the current control module 105 achieves accurate current control based on the current detection module 101 detecting the current of the third terminal (WSS_H2), so that the current control result of the current control module 105 meets the requirements, so as to further ensure the accuracy of the current control of the current control module 105, and also ensure the accuracy of the second wheel speed information sent.

[0107] For some examples, see Figure 12A and Figure 12B The target data channel also includes: a third switch circuit 106, a fourth switch circuit 107, a first resistor R1, and a second resistor R2; one end of the first resistor R1 is connected to the first switch circuit 103, and the other end of the first resistor R1 is connected to the third switch circuit 106; the power supply module 102 is connected to the third switch circuit 106; one end of the second resistor R1 is connected to the fourth switch circuit 107, and the other end of the second resistor R2 is grounded; the fourth switch circuit 107 is also connected to the second switch circuit 104. Taking the third switch circuit 106 and the fourth switch circuit 107 as single-pole double-throw switches as an example, one branch end of the first switch circuit 103 is connected to one end of the resistor R1, the other branch end of the first switch circuit 103 is connected to the current control module 105, and the two ends of the resistor R1 are also respectively connected to the two branch ends of the third switch circuit 106, and the common end of the third switch circuit 106 is connected to the power supply module 102; one branch end of the second switch circuit 104 is connected to the common end of the fourth switch circuit 107, and the other branch end of the second switch circuit 104 is connected to the current control module 105, one end of the second resistor R2 is grounded, and the two ends of the second resistor R2 are also respectively connected to the two branch ends of the fourth switch circuit 107. Figure 12B In the embodiment, the third switch circuit 106 and the fourth switch circuit 107 are switched under the control of the processing module 30 .

[0108] It should be noted that the figures in this embodiment only schematically illustrate the connection status of each single-pole double-throw switch of the switching circuit (the first to fifth switching circuits). The specific status of each switching circuit can be switched according to the function to be implemented by the target data channel, and this embodiment does not impose any restrictions on this.

[0109] In one example, the current detection module 101 includes: a current detection unit 1011 and a detection resistor Rs. The current detection unit 1011 is connected in parallel at both ends of the detection resistor Rs. The detection resistor Rs is connected between the first terminal WSS_1 and the wheel speed sensor or the target ECU.

[0110] Since there are two types of resistance in the ECU, one is to set a pull-up resistor and the other is to set a pull-down resistor; when simulating the ECU, the target data channel of the wheel speed information interaction device in this application can also simulate the two resistance conditions accordingly, as follows:

[0111] Please refer to Figure 12A When the target data channel is used to simulate an ECU configured with a pull-up resistor and is connected to a wheel speed sensor, the first terminal WSS_1 and the second terminal WSS_2 of the target data channel are respectively connected to the wheel speed sensor, the first switch circuit 103 and the third switch circuit 106 are switched to the power supply module 102 and connected to the first terminal WSS_1 through the first resistor R1, and the second switch circuit 104 and the fourth switch circuit 107 are switched to the second terminal WSS_2 and grounded.

[0112] Specifically, the common end of the first switch circuit 103 is connected to the branch end connected to the first resistor R1, and the common end of the third switch circuit 106 is connected to the branch end X1, thereby connecting the power supply module 102, the first resistor R1 to the wheel speed sensor; the common end of the second switch circuit 104 is connected to the branch end connected to the fourth switch circuit 107 (common end), and the common end of the fourth switch circuit 107 is connected to the grounded branch end X2, thereby connecting the wheel speed sensor to the ground through the second terminal WSS_2.

[0113] Figure 12B and Figure 12A They are roughly the same, the main differences are: Figure 12A The first switch circuit 103 to the fourth switch circuit 107 can be controlled and switched by an external device connected to the wheel speed information interaction device; Figure 12B When the target data channel simulates an ECU configured with a pull-up resistor, the processing module 30 controls the first switch circuit 103 and the third switch circuit 106 to switch to the power supply module 102 and connect to the first terminal WSS_1 through the first resistor, and controls the second switch circuit 104 and the fourth switch circuit 107 to switch to the second terminal WSS_2 and ground.

[0114] As described above, the target data channel can simulate the connection between the ECU configured with the pull-up resistor and the wheel speed sensor, and the first resistor R1 is the pull-up resistor of the ECU simulated by the target data channel.

[0115] Please refer to Figure 12AWhen the target data channel is used to simulate an ECU configured with a pull-down resistor and is connected to a wheel speed sensor, the first terminal WSS_1 and the second terminal WSS_2 of the target data channel are respectively connected to the wheel speed sensor, the first switch circuit 103 and the third switch circuit 106 are switched to the power supply module 102 and connected to the first terminal WSS_1, and the second switch circuit 104 and the fourth switch circuit 107 are switched to the second terminal WSS_2 and grounded through the second resistor R2.

[0116] Specifically, the common end of the first switch circuit 103 is connected to the branch end connected to the first resistor R1, and the common end of the third switch circuit 106 is connected to the branch end Y1, thereby connecting the power supply module 102 and the wheel speed sensor; the common end of the second switch circuit 104 is connected to the branch end connected to the fourth switch circuit 107 (common end), and the common end of the fourth switch circuit 204 is connected to the branch end Y2, thereby connecting the wheel speed sensor connected to the second terminal WSS_2 to the ground through the second resistor R2.

[0117] Figure 12B and Figure 12A They are roughly the same, the main differences are: Figure 12A The first switch circuit 103 to the fourth switch circuit 107 can be controlled and switched by an external device connected to the wheel speed information interaction device; Figure 12B When simulating an ECU with a pull-down resistor configured on the target data channel, the processing module 30 controls the first switch circuit 103 and the third switch circuit 106 to switch to the power supply module 102 and connect to the first terminal WSS_1, and controls the second switch circuit 104 and the fourth switch circuit 107 to switch to the second terminal WSS_2 and connect to the ground through the second resistor R2.

[0118] As described above, the first switch circuit 103 , the second switch circuit 104 , the third switch circuit 106 and the fourth switch circuit 107 can be controlled so that the ECU simulated by the target data channel can switch between pull-up and pull-down resistors.

[0119] It should be noted that Figure 12A and Figure 12B The communication mode between the ECU and the wheel speed sensor simulated by the target data channel, that is, the specific process of the target data channel supplying power to the wheel speed sensor and the wheel speed sensor feeding back the current signal to the target data channel. Figure 11A Similar, no further description is given here.

[0120] When the wheel speed information interaction device uses the target data channel to simulate the sensor:

[0121] Please refer to Figure 12C ,by Figure 12BTaking the target data channel as an example, the first terminal WSS_1 and the second terminal WSS_2 of the target data channel are respectively connected to the target ECU. The processing module 30 controls the common end of the first switch circuit 103 in the target data channel to be connected to the branch end connected to the current control module 105, thereby connecting the target ECU to the current control module 105 through the first terminal WSS_1.

[0122] The processing module 30 controls the common end of the second switch circuit 104 in the target data channel to be connected to the branch end connected to the current control module 105 , thereby the target ECU is connected to the current control module 105 through the second terminal WSS_2 .

[0123] It should be noted that Figure 12C The target data channel is connected to the target ECU, and the target data channel simulates a communication process between the sensor and the target ECU, that is, the target ECU supplies power to the current control module 105 in the target data channel, and the processing module 30 controls the current between the first terminal WSS_1 and the second terminal WSS_2 through the current control module 105 to change the current to send the current signal representing the second wheel speed information to the target ECU. Figure 11B Similar, no further description is given here.

[0124] In one example, other data channels in the wheel speed information interaction device that are not the target data channel can also be simulated with two resistance conditions (pull-up resistor and pull-down resistor) when simulating the ECU. For example, the first data channel is not the target data channel. Please refer to Figure 13A 、 13B The first data channel includes: a first terminal WSS_1, a second terminal WSS_2, a power supply module 102, a third switch circuit 106, a fourth switch circuit 107, a first resistor R1, and a second resistor R2; the first resistor R1 is connected between the third switch circuit 106 and the first terminal WSS_1; the power supply module 102 is connected to the third switch circuit 106; and the second resistor R2 is connected between the fourth switch circuit 107 and the second terminal WSS_2.

[0125] Taking the third switch circuit 106 and the fourth switch circuit 107 as single-pole double-throw switches as an example, one end of the resistor R1 is connected to the branch end X1 of the third switch circuit 106, and the other end of the resistor R1 is connected to the branch end Y1 of the third switch circuit 106. The power supply module 102 is connected to the common end of the third switch circuit 106. The other end of the resistor R1 also forms a first terminal WSS_1. One end of the second resistor R2 is grounded, and both ends of the second resistor R2 are also connected to the two branch ends of the fourth switch circuit 107. The common end of the fourth switch circuit 107 forms a second terminal WSS_2. Figure 12BIn the embodiment, the third switch circuit 106 and the fourth switch circuit 107 are switched under the control of the processing module 30 .

[0126] In one example, the current detection module 101 includes: a current detection unit 1011 and a detection resistor Rs. The current detection unit 1011 is connected in parallel to both ends of the detection resistor Rs. The detection resistor Rs is connected between the first terminal WSS_1 and the wheel speed sensor.

[0127] Please refer to Figure 12A In a case where the first terminal WSS_1 and the second terminal WSS_2 are connected to a wheel speed sensor, the target data channel is used to simulate an ECU configured with a pull-up resistor connected to the wheel speed sensor:

[0128] The third switch circuit 106 switches to the power supply module 102 and is connected to the first terminal WSS_1 through the first resistor R1 to supply power to the wheel speed sensor. The fourth switch circuit 107 switches to the second terminal WSS_2 and is grounded without passing through the second resistor R2. Specifically, the common end of the third switch circuit 106 is connected to the branch end X1, thereby connecting the power supply module 102, the first resistor R1 and the wheel speed sensor. The common end of the fourth switch circuit 107 is connected to the grounded branch end X2, thereby connecting the wheel speed sensor to the ground through the second terminal WSS_2.

[0129] In another case where the first terminal WSS_1 and the second terminal WSS_2 are connected to a wheel speed sensor, the target data channel is used to simulate an ECU configured with a pull-down resistor connected to the wheel speed sensor:

[0130] The third switch circuit 106 switches to the power supply module 102 and is connected to the first terminal WSS_1 without the first resistor R1 to supply power to the wheel speed sensor, and the fourth switch circuit 107 switches to the second terminal WSS_2 and is grounded through the second resistor R2; specifically, the common end of the third switch circuit 106 is connected to the branch end Y1, thereby directly connecting the power supply module 102 and the wheel speed sensor without the first resistor R1; the common end of the fourth switch circuit 204 is connected to the branch end Y2, thereby the wheel speed sensor connected to the second terminal WSS_2 is grounded through the second resistor R2.

[0131] In the above two cases, the current detection module 1011 is used to detect the target current. When the first terminal WSS_1 and the second terminal WSS_2 are connected to two ends of the wheel speed sensor, the target current represents the first wheel speed information.

[0132] Figure 13B and Figure 13A They are roughly the same, the main differences are: Figure 13A The third switch circuit 106 and the fourth switch circuit 107 can be controlled by an external device connected to the wheel speed information interaction device; Figure 13B When the target data channel simulates an ECU configured with a pull-up resistor, the processing module 30 controls the third switch circuit 106 to switch to the power supply module 102 connected to the first terminal WSS_1 through the first resistor, and controls the fourth switch circuit 107 to switch to the second terminal WSS_2 grounded.

[0133] As described above, the first data channel can simulate the connection between the ECU configured with the pull-up resistor and the wheel speed sensor. The first resistor R1 is the pull-up resistor of the ECU simulated by the first data channel.

[0134] For some examples, see Figure 14A 、 Figure 14B 、 Figure 15A and Figure 15B , the current control module 105 includes: a DAC digital-to-analog converter 1051, a first current control unit 1052, a second current control unit 1053 and a fifth switch circuit 1054. The signal output end of the digital-to-analog converter 1051 is respectively connected to the first current control unit 1052 and the second current control unit 1053, and the second current control unit 1053 is also grounded. The first current control unit 1052 and the second current control unit 1053 are also respectively connected to the fifth switch circuit 1054, the fifth switch circuit 1054 is connected to the first switch circuit 103, and the first current control unit 1052 is also connected to the second switch circuit 104. Taking the fifth switch circuit 1054 as a single-pole double-throw switch as an example, the common end of the fifth switch circuit 1054 is connected to a branch end of the first switch circuit 103, one branch end of the fifth switch circuit 1054 is connected to the first current control unit 1052, and the other branch end of the fifth switch circuit 1054 is connected to the second current control unit 1053. In Figure 15A 、 Figure 15B In the embodiment, the signal input terminal of the digital-to-analog conversion module is connected to the processing module 30 , the current detection unit 1011 is connected to the processing module 30 , and the fifth switch circuit 1054 is controlled by the processing module 30 to switch.

[0135] Since there are two types of resistance in the ECU, one is to set a pull-up resistor and the other is to set a pull-down resistor; when simulating the sensor, the target data channel of the wheel speed information interaction device in this application can also perform sensor simulation based on these two conditions of the connected ECU, as follows:

[0136] Please refer to Figure 14AWhen the target data channel is connected to the target ECU configured with a pull-up resistor, the first switch circuit 103 and the fifth switch circuit 1054 are switched to connect the second current control unit 1053 to the first terminal WSS_1; specifically, the common end of the first switch circuit 103 is connected to the branch end connected to the fifth switch circuit 1054 (common end), and the common end of the fifth switch circuit 1054 is connected to the branch end connected to the second current control unit 1053; thus, the first terminal WSS_1 is connected to the second current control unit 1053, that is, the terminal E1 of the target ECU is connected to the second current control unit 1053 through the first terminal WSS_1.

[0137] The second switch circuit 104 switches to the common end and is connected to the branch end connected to the first current control unit 1052. At this time, the second current control unit 1053 is connected to the terminal E2 of the target ECU, or the second switch circuit 104 can also be switched to the common end and is connected to the branch end connected to the fourth switch circuit 107. At this time, the second terminal WSS_2 is grounded, that is, the terminal E2 of the target ECU is grounded through the second terminal WSS_2.

[0138] Please refer to Figure 14B When the target data channel is connected to the target ECU configured with a pull-down resistor, the first switch circuit 103 and the fifth switch circuit 1054 are switched to connect the first current control unit 1052 to the first terminal WSS_1, and the second switch circuit 104 is switched to connect the first current control unit 1052 to the second terminal WSS_2.

[0139] Specifically, the common end of the first switch circuit 103 is connected to the branch end connected to the fifth switch circuit 1054 (common end), and the common end of the fifth switch circuit 1054 is connected to the branch end connected to the first current control unit 1052. At this time, the terminal E1 of the target ECU is connected to the first current control unit 1052 through the first terminal WSS_1; the common end of the second switch circuit 104 is connected to the branch end connected to the first current control unit 1052. At this time, the first current control unit 1052 is connected to the fourth terminal of the target ECU. At this time, the terminal E2 of the target ECU is connected to the first current control unit 1052 through the second terminal WSS_2.

[0140] Figure 15B and Figure 14B They are roughly the same, the main differences are: Figure 14B The first switch circuit 103, the second switch circuit 104 and the fifth switch circuit 1054 can be controlled and switched by an external device connected to the wheel speed information interaction device; Figure 15BIn the process, the processing module 30 can receive information sent by an external device through the communication module 20, which indicates the configuration of the pull-down resistor of the currently connected target ECU, and then control the switching of the first switch circuit 103, the second switch circuit 104 and the fifth switch circuit 1054 based on the information. Alternatively, the processing module 30 can also directly receive a control instruction sent by an external device, which indicates the status of the first switch circuit 103, the second switch circuit 104 and the fifth switch circuit 1054, and control the switching of the first switch circuit 103, the second switch circuit 104 and the fifth switch circuit 1054 based on the control instruction.

[0141] In the above process, based on the control of the fifth switch circuit 1054, the first current control unit 1052 or the second current control unit 1053 can be selected according to whether the target ECU is a pull-up resistor or a pull-down resistor to control the current between the two terminals of the target ECU; Figure 14A 、 15A As shown, a pull-up resistor is provided in the ECU, and at this time the second current control unit 1053 establishes a connection with the target ECU to perform current control; Figure 14B 、 15B As shown, a pull-up resistor is provided in the ECU, and at this time the first current control unit 1052 establishes a connection with the target ECU to perform current control.

[0142] The digital-to-analog converter 1051 can receive a digital signal representing the first wheel speed information to be transmitted, convert the digital signal representing the first sensor data to be transmitted into an analog signal, and output it to a current control unit (a first current control unit or a second current control unit) to adjust the current output by the current control unit to the target ECU. The current control unit (the first current control unit or the second current control unit) can be implemented as a constant current source circuit that controls the current by an analog quantity, thereby changing the current by varying the voltage across a reference resistor. The digital signal representing the first wheel speed information to be transmitted received by the digital-to-analog converter 1051 can originate from an external device or the processing module 30.

[0143] Figure 14A 、 14B 15A and 15B are mainly used to illustrate the communication between the target data channel simulation sensor and the target ECU. The target data channel is used to illustrate the communication between the simulation ECU and the wheel speed sensor. Figure 12A 、 Figure 12B Similar, no further description is given here.

[0144] In one example, other data channels other than the target data channel in the wheel speed information interaction device can also perform sensor simulation based on the two conditions (pull-up resistor and pull-down resistor) of the connected ECU when simulating the sensor, as follows:

[0145] For example, the second data channel is not the target data channel, please refer to Figure 16A 、 16B , 17A, 17B, the second data channel includes: a first terminal WSS_1, a second terminal WSS_2 and a current control module 105; the current control module 105 includes: a DAC digital-to-analog converter 1051, a first current control unit 1052, a second current control unit 1053 and a fifth switch circuit 1054, the signal output end of the digital-to-analog converter 1051 is respectively connected to the first current control unit 1052 and the second current control unit 1053, the second current control unit 1053 is also grounded, the first current control unit 1052 and the second current control unit 1053 are also respectively connected to the fifth switch circuit 1054, the fifth switch circuit 1054 is also connected to the first terminal WSS_1, and the first current control unit is also connected to the second terminal WSS_2. Taking the fifth switch circuit 1054 as a single-pole double-throw switch as an example, the common end of the fifth switch circuit 1054 forms a first terminal WSS_1, one branch end of the fifth switch circuit 1054 is connected to the first current control unit 1052, and the other branch end of the fifth switch circuit 1054 is connected to the second current control unit 1053. One end of the second current control unit 1053 forms a second terminal WSS_2. Figure 17A 、 Figure 17B In the embodiment, the signal input end of the digital-to-analog conversion module is connected to the processing module 30 , and the fifth switch circuit 1054 is controlled by the processing module 30 to switch.

[0146] In one case when the first terminal and the second terminal are connected to the target ECU, the second data channel is connected to the target ECU configured with a pull-up resistor: the fifth switch circuit is switched to connect the second current control unit 1053 to the first terminal WSS_1; that is, the common end of the fifth switch circuit 1054 is connected to the branch end connected to the second current control unit 1053, and at this time the second current control unit 1053 is used to control the current flowing through the first terminal WSS_1 and the first terminal to form a current signal representing the second wheel speed information to be sent to the target ECU.

[0147] In another case when the first terminal and the second terminal are connected to the target ECU, the second data channel is connected to the target ECU configured with a pull-down resistor: the fifth switch circuit 1054 switches to the first current control unit 1052 and is connected to the first terminal WSS_1; that is, the common end of the fifth switch circuit 1054 is connected to the branch end connected to the first current control unit 1052, and at this time, a current control unit 1052 is used to control the current flowing through the first terminal WSS_1 and the first terminal to form a current signal representing the second wheel speed information to be sent to the target ECU.

[0148] Figure 17Aand Figure 16A Roughly the same, Figure 17B and Figure 16B They are roughly the same, the main differences are: Figure 16A 、 Figure 16B The fifth switch circuit 1054 can be controlled by an external device connected to the wheel speed information interaction device; Figure 17A 、 Figure 17B In the embodiment, the processing module 30 can receive information sent by an external device through the communication module 20, which indicates the configuration of the pull-up resistor of the currently connected target ECU, and then control the switching of the fifth switch circuit 1054 based on the information. Alternatively, the processing module 30 can also directly receive a control instruction sent by an external device, which indicates the state of the fifth switch circuit 1054, and control the switching of the fifth switch circuit 1054 based on the control instruction.

[0149] It should be noted that, in the above embodiment, the first to fifth switch circuits are all single-pole double-throw switches. In practice, they can be selected according to needs, such as a single switch, a two-way switch, etc., as long as the corresponding functions can be achieved.

[0150] For some examples, see Figure 18 The target data channel further includes a voltage detection module 40, which is connected between the external connection terminal of the first switch circuit 103 and the external connection terminal of the second switch circuit 104. Figure 18 Take the wheel speed information interaction device including the processing module 30 as an example.

[0151] The voltage detection module 40 includes: a first voltage dividing resistor R f1 , the second voltage divider resistor R f1 And a voltage detection unit 401; the voltage detection unit 401 is, for example, an analog-to-digital converter. The first voltage dividing resistor R f1 With the second voltage divider resistor R f2 The voltage detection unit 401 is connected in series between the external connection terminal of the first switch circuit 103 and the external connection terminal of the second switch circuit 104, and the voltage detection unit 401 is connected in parallel with the second voltage dividing resistor R f2 The voltage detection unit 401 is further connected to the processing module 30. The voltage detection module 40 can detect the voltage between the external connection terminal of the first switch circuit 103 and the external connection terminal of the second switch circuit 104.

[0152] Processing module 30 is configured to: when the target data channel is connected to the wheel speed sensor, detect the voltage between the first terminal WSS_1 and the second terminal WSS_2 via voltage detection module 40; and when the detected voltage between the first terminal WSS_1 and the second terminal WSS_2 meets the power supply requirement of the wheel speed sensor, detect the current at the first terminal WSS_1 or the second terminal WSS_2 via the current detection module in the first data channel to determine a current signal representing the first wheel speed information. In other words, when the target data channel simulates the ECU, processing module 30 first determines that the power supply to the wheel speed sensor meets the power supply requirement before performing subsequent processing, such as determining the current signal based on the current detected by current detection module 101, thereby determining the first wheel speed information of the wheel speed sensor.

[0153] Processing module 30 is configured to, when the target data channel is connected to the target ECU, detect the voltage between first terminal WSS_1 and second terminal WSS_2 via voltage detection module 40; and, when the detected voltage between first terminal WSS_1 and second terminal WSS_2 meets a preset sensor power requirement, control the current between first terminal WSS_1 and second terminal WSS_2 via a current control module in the target data channel. In other words, when the target data channel simulates a sensor, processing module 30 first determines whether the voltage output by the target ECU meets the preset power requirement. Once the power supplied to the sensor simulated by the target data channel meets the preset sensor power requirement, subsequent processing is performed. For example, based on the current change between terminals E1 and E2 of the target ECU controlled by the current control module, the target ECU can determine a current signal, i.e., determine the second wheel speed information of the sensor simulated by the target data channel, by detecting the change in current magnitude.

[0154] The power supply requirement mentioned above is, for example, whether the power supply voltage reaches a set voltage value.

[0155] The first current control unit 1052 includes: a first operational amplifier circuit A1 and a first transistor T1; the second current control unit 1053 includes: a second operational amplifier circuit A2, a second transistor T2, and a third resistor R3; the input end of the first operational amplifier circuit A1 is connected to the output end of the digital-to-analog converter 201, the output end of the first operational amplifier circuit A1 is connected to the control end of the first transistor, the input end of the second operational amplifier circuit A2 is connected to the output end of the digital-to-analog converter 201, and the output end of the second operational amplifier circuit A2 is connected to the control end of the second transistor T2; the two branches of the fifth switch circuit 1054 are respectively connected to the first end of the first transistor T1 and the first end of the second transistor T2; the second end of the first transistor T1 is connected to a branch end of the second switch circuit 104; and the second end of the second transistor T2 is grounded via the third resistor R3. The first transistor T1 and the second transistor T2 may be MOS transistors, and thus the current flowing through the first transistor T1 and the second transistor T2 can be adjusted by adjusting the voltage of the MOS transistor gate, thereby realizing the current control function of the current control module.

[0156] The first switch circuit 103 and the second switch circuit 104 are single-pole double-throw switches, the third switch circuit 106 and the fourth switch circuit 107 are ordinary switches, the third switch circuit 106 is connected in parallel across the first resistor R1, and the fourth switch circuit 107 is connected in parallel across the second resistor R2.

[0157] The communication module 20 includes: a CAN / CAN FD unit (for example, a CAN transceiver chip), an EtherCAT unit (for example, an EtherCAT chip), a JL2121 unit (a Gigabit Ethernet chip), etc., and may also use an in-vehicle Ethernet chip, other Ethernet chips, LIN chips, Flexray chips, DSI3 chips, PSI5 chips, etc.

[0158] The processing module 30 may include an FPGA module and an MCU. The MCU is mainly used to communicate with external devices through the communication module 20. The FPGA module can implement various required processing. The above-mentioned first to fifth switching circuits can be controlled by the FPGA module, or by the MCU, or by the FPGA module via the MCU.

[0159] In addition, the FPGA module 101 is also connected to an LED module to indicate the working status of the wheel speed information interaction device. The power supply module 102 is connected to an external power supply.

[0160] It should be noted that Figure 18 The target data channel of the wheel speed information interaction device can also simulate the ECU or sensor. The specific method is similar to the above and will not be repeated here.

[0161] A third embodiment of the present utility model relates to a test system, comprising a data processing unit and the wheel speed information interaction device of the first or second embodiment; the wheel speed information interaction device is connected to the data processing unit via a communication module, and the data processing unit may be, for example, an RTPC, which may be a computer, a mainboard, or a combination of a mainboard and other circuit boards; the wheel speed information interaction device is connected to a target ECU via a second data channel.

[0162] The data processing unit is used to send the second wheel speed information to the target ECU through the second data channel to serve as a test basis for the target ECU.

[0163] The test system can be a HIL test system, which can implement the function of Example 3 in the first embodiment and perform HIL hardware-in-the-loop testing on the target ECU using the second wheel speed information; the test system can also be a data injection system, which can implement the function of Example 2 in the first embodiment and inject the second wheel speed information back into the target ECU to test the target ECU.

[0164] The second wheel speed information to be sent to the target ECU includes at least one of the following:

[0165] The pre-stored wheel speed information is wheel speed information pre-stored in the data processing unit or a storage device connected to the data processing unit;

[0166] Simulated wheel speed information is wheel speed information simulated and calculated by a processing module in a data processing unit or a wheel speed information interaction device;

[0167] The test bench wheel speed information is the first wheel speed information detected by the wheel speed sensor when the mechanical structure of the test bench is operating.

[0168] The data processing unit is used to use the second wheel speed information obtained through the wheel speed information interaction device as a test basis for the target ECU.

[0169] The test system may include one or more wheel speed information interaction devices. If the test system includes multiple wheel speed information interaction devices, the test system can use these multiple wheel speed information interaction devices to implement multiple different test functions. Of course, these multiple wheel speed information interaction devices can also be used to implement the same test function.

[0170] Since the first and second embodiments correspond to this embodiment, this embodiment can be implemented in conjunction with the first and second embodiments. The relevant technical details mentioned in the first and second embodiments are still valid in this embodiment, and the technical effects achieved in the first and second embodiments can also be achieved in this embodiment. To reduce repetition, they will not be repeated here. Accordingly, the relevant technical details mentioned in this embodiment can also be applied to the first and second embodiments.

[0171] A fourth embodiment of the present utility model relates to a test system, comprising a data processing unit and the wheel speed information interaction device of the first or second embodiment; the wheel speed information interaction device is connected to the data processing unit via a communication module, wherein the data processing unit may be, for example, an RTPC, which may be a computer, a mainboard, or a combination of a mainboard and other circuit boards.

[0172] The wheel speed information interaction device is connected to the wheel speed sensor via a first data channel; the data processing unit is used to obtain first wheel speed information through the wheel speed information interaction device as a test basis for the wheel speed sensor; the first wheel speed information is, for example, a current signal sent by the wheel speed sensor to the first data channel.

[0173] The test system may be a HIL test system, which can implement the function of Example 4 in the first embodiment and perform a verification test on the function of the wheel speed sensor, such as performing a HIL hardware-in-the-loop test on the wheel speed sensor using the first wheel speed information.

[0174] The test system may include one or more wheel speed information interaction devices. If the test system includes multiple wheel speed information interaction devices, the test system can use these multiple wheel speed information interaction devices to implement multiple different test functions. Of course, these multiple wheel speed information interaction devices can also be used to implement the same test function.

[0175] Since the first and second embodiments correspond to this embodiment, this embodiment can be implemented in conjunction with the first and second embodiments. The relevant technical details mentioned in the first and second embodiments are still valid in this embodiment, and the technical effects achieved in the first and second embodiments can also be achieved in this embodiment. To reduce repetition, they will not be repeated here. Accordingly, the relevant technical details mentioned in this embodiment can also be applied to the first and second embodiments.

[0176] A fifth embodiment of the present utility model relates to a data acquisition system, comprising: a data processing unit, and the wheel speed information interaction device of the first or second embodiment; the wheel speed information interaction device is connected to the data processing unit via a communication module.

[0177] The wheel speed information interaction device is connected to the wheel speed sensor via a first data channel;

[0178] The data processing unit is used to obtain the first wheel speed information through the wheel speed information interaction device and perform preset processing on the first wheel speed information; the preset processing includes at least one of the following: storing part or all of the first wheel speed information; visualizing part or all of the first wheel speed information; and analyzing part or all of the first wheel speed information.

[0179] The data acquisition system can realize the data acquisition function of Example 1 in the first embodiment, and perform at least one of storage, visualization and analysis on the data collected by the wheel speed sensor; in one example, the wheel speed information interaction device and the wheel speed sensor are both provided in the vehicle; the ECU used in the vehicle is used as the target ECU; the wheel speed information interaction device is also connected to the target ECU through a second data channel to send part or all of the first wheel speed information from the first sensor as second wheel speed information to the target ECU.

[0180] Since the first and second embodiments correspond to this embodiment, this embodiment can be implemented in conjunction with the first and second embodiments. The relevant technical details mentioned in the first and second embodiments are still valid in this embodiment, and the technical effects achieved in the first and second embodiments can also be achieved in this embodiment. To reduce repetition, they will not be repeated here. Accordingly, the relevant technical details mentioned in this embodiment can also be applied to the first and second embodiments.

[0181] While preferred embodiments of the present invention have been described in detail above, it should be understood that aspects of the embodiments can be modified, if necessary, to employ aspects, features and concepts of the various patents, applications and publications to provide further embodiments.

[0182] These and other changes can be made to the embodiments in light of the above detailed description.In general, in the claims, the terms used should not be construed as limited to the specific embodiments disclosed in the specification and claims, but should be construed to include all possible embodiments along with the full scope of equivalents to which these claims are entitled.

Claims

1. A wheel speed information interaction device, characterized in that: include: N data channels, where N is an integer greater than or equal to 1, and the N data channels include a first data channel; When the first data channel is connected to the wheel speed sensor, the first data channel supplies power to the wheel speed sensor and receives first wheel speed information sent by the wheel speed sensor; wherein the first data channel includes: a terminal, a power supply module, and a current detection module; The terminal is used to connect the wheel speed sensor; The power supply module is used to supply power to the wheel speed sensor through the terminal; The current detection module is used to detect a target current. When the terminal is connected to the wheel speed sensor, the target current represents the first wheel speed information.

2. The wheel speed information interaction device according to claim 1, characterized in that: The N data channels include a second data channel; When the second data channel is connected to the target ECU, the second data channel sends second wheel speed information to the target ECU.

3. The wheel speed information interaction device according to claim 2, characterized in that: The second data channel includes: a terminal and a current control module; The terminal is used to connect to the target ECU; The current control module is used to control the current flowing through the terminal to form a current signal representing the second wheel speed information to be sent to the target ECU.

4. The wheel speed information interaction device according to claim 2, characterized in that: Some or all of the N data channels are target data channels. For the target data channels, the first data channel and the second data channel are different states of the target data channels. The target data channels include: a first terminal, a second terminal, a current detection module, a power supply module, a first switch circuit, a second switch circuit, and a current control module; the power supply module is connected to the first switch circuit, and the current control module is connected to the first switch circuit and the second switch circuit respectively. When the first terminal and the second terminal are connected to the wheel speed sensor, the first switch circuit switches to connect the power supply module to the first terminal, and the second switch circuit switches to ground the second terminal, so that the power supply module supplies power to the wheel speed sensor; The current detection module is used to detect a target current. When the first terminal and the second terminal are connected to both ends of the wheel speed sensor, the target current represents the first wheel speed information. When the first terminal and the second terminal are connected to the target ECU, the first switch circuit switches to connect the current control module to the first terminal; When the first terminal and the second terminal are connected to the target ECU, the second switch circuit switches to connect the current control module to the second terminal to be grounded through the second terminal; or: the current control module is grounded without the second switch circuit and the second terminal; The current control module is used to control the current flowing through the first terminal when connected to the first terminal, so as to form a current signal representing the second wheel speed information to be sent to the target ECU.

5. The wheel speed information interaction device according to claim 2, characterized in that: The second data channel includes: a first terminal, a second terminal and a current control module; The current control module includes: a digital-to-analog converter, a first current control unit, a second current control unit, and a fifth switch circuit, wherein the signal output terminal of the digital-to-analog converter is connected to the first current control unit and the second current control unit respectively, the second current control unit is further grounded, the first current control unit and the second current control unit are further connected to the fifth switch circuit respectively, the fifth switch circuit is further connected to the first terminal, and the first current control unit is further connected to the second terminal; In one case when the first terminal and the second terminal are connected to the target ECU, the fifth switch circuit switches so that the second current control unit is connected to the first terminal; In another case where the first terminal and the second terminal are connected to the target ECU, the fifth switch circuit is switched so that the first current control unit is connected to the first terminal.

6. The wheel speed information interaction device according to any one of claims 1 to 5, characterized in that: The wheel speed information interaction device further includes: a communication module, the communication module being configured to connect to an external device; The communication module is used for: receiving second wheel speed information sent by the external device; and / or, The first wheel speed information is sent to the external device.

7. The wheel speed information interaction device according to claim 2, characterized in that: When the wheel speed information interaction device is connected to the target ECU and the wheel speed sensor at the same time, the second wheel speed information sent to the target ECU is derived from the first wheel speed information sent from the wheel speed sensor.

8. A wheel speed information interaction device, characterized in that: include: N data channels, where N is an integer greater than or equal to 1, and the N data channels include a first data channel; When the first data channel is connected to the wheel speed sensor, the first data channel supplies power to the wheel speed sensor and receives first wheel speed information sent by the wheel speed sensor. The first data channel includes: a first terminal, a second terminal, a power supply module, a third switch circuit, a fourth switch circuit, a first resistor, a second resistor, and a current detection module. The first resistor is connected between the third switch circuit and the first terminal. The power supply module is connected to the third switch circuit. The second resistor is connected between the fourth switch circuit and the second terminal. In a case where the first terminal and the second terminal are connected to the wheel speed sensor, the third switch circuit is switched to the power supply module and connected to the first terminal through the first resistor to supply power to the wheel speed sensor, and the fourth switch circuit is switched to the second terminal and connected to ground without passing through the second resistor; In another case where the first terminal and the second terminal are connected to the wheel speed sensor, the third switch circuit switches the power supply module to be connected to the first terminal without passing through the first resistor to supply power to the wheel speed sensor, and the fourth switch circuit switches the second terminal to be grounded through the second resistor; The current detection module is used to detect a target current. When the first terminal and the second terminal are connected to two ends of the wheel speed sensor, the target current represents the first wheel speed information.

9. The wheel speed information interaction device according to claim 8, characterized in that: The N data channels include a second data channel; When the second data channel is connected to the target ECU, the second data channel sends second wheel speed information to the target ECU.

10. The wheel speed information interaction device according to claim 9, characterized in that: The second data channel includes: a terminal and a current control module; The terminal is used to connect to the target ECU; The current control module is used to control the current flowing through the terminal to form a current signal representing the second wheel speed information to be sent to the target ECU.

11. The wheel speed information interaction device according to claim 9, characterized in that: Some or all of the N data channels are target data channels. For the target data channels, the first data channel and the second data channel are different states of the target data channels. The target data channels include: a first terminal, a second terminal, a current detection module, a power supply module, a first switch circuit, a second switch circuit, and a current control module; the power supply module is connected to the first switch circuit, and the current control module is connected to the first switch circuit and the second switch circuit respectively. When the first terminal and the second terminal are connected to the wheel speed sensor, the first switch circuit switches to connect the power supply module to the first terminal, and the second switch circuit switches to ground the second terminal, so that the power supply module supplies power to the wheel speed sensor; The current detection module is used to detect a target current. When the first terminal and the second terminal are connected to both ends of the wheel speed sensor, the target current represents the first wheel speed information. When the first terminal and the second terminal are connected to the target ECU, the first switch circuit switches to connect the current control module to the first terminal; When the first terminal and the second terminal are connected to the target ECU, the second switch circuit switches to connect the current control module to the second terminal to be grounded through the second terminal; or: the current control module is grounded without the second switch circuit and the second terminal; The current control module is used to control the current flowing through the first terminal when connected to the first terminal, so as to form a current signal representing the second wheel speed information to be sent to the target ECU.

12. The wheel speed information interaction device according to claim 9, characterized in that: The second data channel includes: a first terminal, a second terminal and a current control module; The current control module includes: a digital-to-analog converter, a first current control unit, a second current control unit, and a fifth switch circuit, wherein the signal output terminal of the digital-to-analog converter is connected to the first current control unit and the second current control unit respectively, the second current control unit is further grounded, the first current control unit and the second current control unit are further connected to the fifth switch circuit respectively, the fifth switch circuit is further connected to the first terminal, and the first current control unit is further connected to the second terminal; In one case when the first terminal and the second terminal are connected to the target ECU, the fifth switch circuit switches so that the second current control unit is connected to the first terminal; In another case where the first terminal and the second terminal are connected to the target ECU, the fifth switch circuit is switched so that the first current control unit is connected to the first terminal.

13. The wheel speed information interaction device according to any one of claims 8 to 12, characterized in that: The wheel speed information interaction device further includes: a communication module, the communication module being configured to connect to an external device; The communication module is used for: receiving second wheel speed information sent by the external device; and / or, The first wheel speed information is sent to the external device.

14. The wheel speed information interaction device according to claim 9, characterized in that: When the wheel speed information interaction device is connected to the target ECU and the wheel speed sensor at the same time, the second wheel speed information sent to the target ECU is derived from the first wheel speed information sent from the wheel speed sensor.

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