Data acquisition device for automobile development test system

Abstract

The utility model discloses a data acquisition device for an automobile development test system. The device comprises a data acquisition unit or is formed by connecting a plurality of data acquisition units in series, when the data acquisition device comprises one data acquisition unit, the data acquisition unit at least comprises two data acquisition modules, each data acquisition module is used for acquiring one type of data, and the total type of data acquired by all the data acquisition modules is at least two. When the data acquisition device is formed by connecting a plurality of data acquisition units in series, the total number of the data acquisition modules included in all the data acquisition units is at least two, each data acquisition module is used for acquiring one type of data, and the total types of the data acquired by all the data acquisition modules are at least two. According to the utility model, the use cost can be reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of data acquisition, in particular to a data acquisition device for an automobile development and testing system. Background Art

[0002] At present, in automobile development test systems, such as the PUMA test system, a data acquisition device is included that can only collect pressure data, resulting in fewer application scenarios.

[0003] Furthermore, if it is necessary to collect multiple types of data, additional specific data collection devices need to be added, resulting in increased user costs. Utility Model Content

[0004] The utility model provides a data acquisition device for automobile development and testing system to reduce the user's use cost. The specific technical solution is as follows:

[0005] In a first aspect, the utility model provides a data acquisition device for an automobile development test system, the data acquisition device comprising a data acquisition unit, or a plurality of data acquisition units connected in series, each data acquisition unit comprising a microcontroller unit MCU, a control area network CAN bus transceiver, a communication interface circuit and a data acquisition module, the control area network CAN bus transceiver is connected to the microcontroller unit MCU by signal, the microcontroller unit MCU is connected to the communication interface circuit by signal, and the communication interface circuit is connected to each data acquisition module by signal;

[0006] When the data acquisition device includes a data acquisition unit, the data acquisition unit includes at least two data acquisition modules, each data acquisition module is used to collect one type of data and the total type of data collected by all data acquisition modules is at least two, the input interface of the control area network CAN bus transceiver of the data acquisition unit is connected to the control area network open CANOPEN interface signal of the automobile development test system, and the output interface of the control area network CAN bus transceiver is electrically connected to the power supply;

[0007] When the data acquisition device is composed of multiple data acquisition units connected in series, the total number of data acquisition modules included in all data acquisition units is at least two, each data acquisition module is used to collect one type of data and the total types of data collected by all data acquisition modules are at least two, the input interface of the control local area network CAN bus transceiver of any one of the multiple data acquisition units is connected to the control local area network open CANOPEN interface signal of the automobile development and test system, the output interface of the control local area network CAN bus transceiver of each data acquisition unit except the last data acquisition unit is connected to the input interface signal of the control local area network CAN bus transceiver of the next data acquisition unit, and the output interface of the control local area network CAN bus transceiver of the last data acquisition unit is electrically connected to the power supply.

[0008] Optionally, each data acquisition module includes at least one measurement channel, and the number of measurement channels included in each data acquisition unit is less than a first preset number.

[0009] Optionally, the total number of measurement channels included in all data acquisition units is less than or equal to a second preset number.

[0010] Optionally, the total number of measurement channels included in all data acquisition units is the same as the number of channels included in the control area network open CANOPEN interface protocol.

[0011] Optionally, the communication interface circuit is an RS485 interface circuit.

[0012] Optionally, the communication interface circuit is connected to each data acquisition module via a communication interface bus.

[0013] Optionally, the data acquisition module is a distributed industrial field bus input and output IO module.

[0014] It can be seen from the above content that the data acquisition device for an automobile development and test system provided by the embodiment of the utility model includes a data acquisition unit, or is composed of multiple data acquisition units connected in series, each data acquisition unit includes a microcontroller unit MCU, a control area network CAN bus transceiver, a communication interface circuit and a data acquisition module, the control area network CAN bus transceiver is signal-connected to the microcontroller unit MCU, the microcontroller unit MCU is signal-connected to the communication interface circuit, and the communication interface circuit is signal-connected to each data acquisition module; when the data acquisition device includes a data acquisition unit, the data acquisition unit includes at least two data acquisition modules, each data acquisition module is used to collect one type of data and the total type of data collected by all data acquisition modules is at least two, and the input interface of the control area network CAN bus transceiver of the data acquisition unit is connected to the control area network open CANOPEN interface signal of the automobile development and test system. The output interface of the CAN bus transceiver of the control local area network is electrically connected to the power supply; when the data acquisition device is composed of multiple data acquisition units connected in series, the total number of data acquisition modules included in all data acquisition units is at least two, each data acquisition module is used to collect one type of data and the total type of data collected by all data acquisition modules is at least two, the input interface of the CAN bus transceiver of any one of the multiple data acquisition units is connected to the CANOPEN interface signal of the control local area network of the automobile development and test system, the output interface of the CAN bus transceiver of each data acquisition unit except the last data acquisition unit is connected to the input interface signal of the CAN bus transceiver of the control local area network of the next data acquisition unit, and the output interface of the CAN bus transceiver of the control local area network of the last data acquisition unit is electrically connected to the power supply. When the data acquisition device includes a data acquisition unit, the data acquisition unit includes at least two data acquisition modules, each data acquisition module is used to collect one type of data and the total types of data collected by all data acquisition modules are at least two; when the data acquisition device is composed of multiple data acquisition units connected in series, the total number of data acquisition modules included in all data acquisition units is at least two, each data acquisition module is used to collect one type of data and the total types of data collected by all data acquisition modules are at least two. Therefore, the automobile development test system provided by the embodiment of the utility model can collect multiple types of data, increase the application scenarios, and does not require additional data acquisition devices, thereby reducing the user's usage cost.

[0015] The innovative features of the present utility model embodiment include:

[0016] 1. When the data acquisition device includes a data acquisition unit, the data acquisition unit includes at least two data acquisition modules, each data acquisition module is used to collect one type of data and the total type of data collected by all data acquisition modules is at least two; when the data acquisition device is composed of multiple data acquisition units connected in series, the total number of data acquisition modules included in all data acquisition units is at least two, each data acquisition module is used to collect one type of data and the total type of data collected by all data acquisition modules is at least two. Therefore, the automobile development test system provided by the embodiment of the utility model can collect multiple types of data, increase the application scenarios, and does not require additional data acquisition devices, thereby reducing the user's usage cost.

[0017] 2. When the data acquisition device includes a data acquisition unit, the signal transmission between a single data acquisition unit and the automobile development and test system is realized by connecting the input interface of the control area network CAN bus transceiver with the control area network open CANOPEN interface signal of the automobile development and test system, and electrically connecting the output interface of the control area network CAN bus transceiver with the power supply.

[0018] 3. When the data acquisition device is composed of multiple data acquisition units connected in series, the input interface of the control area network CAN bus transceiver of the first data acquisition unit among the multiple data acquisition units is connected to the control area network open CANOPEN interface signal of the automobile development and test system, and the output interface of the control area network CAN bus transceiver of each data acquisition unit except the last data acquisition unit is connected to the input interface signal of the control area network CAN bus transceiver of the next data acquisition unit, and the output interface of the control area network CAN bus transceiver of the last data acquisition unit is electrically connected to the power supply, so as to form a series connection between the multiple data acquisition units, thereby realizing signal transmission between the multiple data acquisition units and the automobile development and test system.

[0019] Of course, implementing any product or method of the present invention does not necessarily require achieving all of the advantages described above at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions in the embodiments of the utility model or the prior art, the drawings required for use in the embodiments or the prior art description are briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can also be obtained based on these drawings without creative work.

[0021] Figure 1 A structural schematic diagram of a data acquisition device for an automobile development test system provided by an embodiment of the utility model;

[0022] Figure 2 A structural schematic diagram of a data acquisition unit provided in an embodiment of the utility model.

[0023] Figure 1-Figure 2 In the figure, 1 is a data acquisition module, 2 is a control area network open CANOPEN interface, 3 is a power supply, 4 is a first data acquisition unit, 4 is an input interface of the first data acquisition unit, 5 is a last data acquisition unit, 5 is an output interface of the last data acquisition unit, 6 is a micro control unit MCU, 7 is a control area network CAN bus transceiver, 7 is a control area network CAN bus transceiver input interface, 72 is a control area network CAN bus transceiver output interface, 8 is a communication interface circuit, and 9 is a communication interface bus. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0025] It should be noted that the terms "including" and "having" and any variations thereof in the embodiments of the present utility model and the accompanying drawings are intended to cover non-exclusive inclusions. For example, a process, method, system, product or device comprising a series of steps or units is not limited to the listed steps or units, but may optionally include steps or units not listed, or may optionally include other steps or units inherent to these processes, methods, products or devices.

[0026] The embodiment of the utility model discloses a data acquisition device for an automobile development and testing system, which can reduce the use cost of users. The embodiment of the utility model is described in detail below.

[0027] Figure 1 A structural schematic diagram of a data acquisition device for an automobile development test system provided by an embodiment of the utility model. Figure 2 A structural schematic diagram of a data acquisition unit provided in an embodiment of the utility model.

[0028] See also Figure 1 and Figure 2 The data acquisition device for an automobile development test system provided by an embodiment of the utility model includes a data acquisition unit, or is composed of a plurality of data acquisition units connected in series.

[0029] Among them, the data acquisition unit includes a parsing code for the CANOPEN (Controller Area Network OPEN) interface protocol, so the data acquisition device provided by the embodiment of the utility model can be compatible with an automobile development test system that adopts the CANOPEN interface protocol of the controller area network, such as the PUMA test system.

[0030] When the data acquisition device includes one data acquisition unit, the data acquisition unit includes at least two data acquisition modules 1, each data acquisition module 1 is used to acquire one type of data and the total types of data acquired by all data acquisition modules 1 are at least two.

[0031] The input interface of the data acquisition unit is signal-connected to the control area network open CANOPEN interface 2 of the automobile development and test system, and the output interface of the data acquisition unit is electrically connected to the power supply 3. At this time, the number of data acquisition modules 1 included in a data acquisition unit is at least two.

[0032] Continue to see Figure 1 When the data acquisition device is composed of multiple data acquisition units connected in series, the total number of data acquisition modules 1 included in all data acquisition units is at least two, each data acquisition module 1 is used to collect one type of data and the total type of data collected by all data acquisition modules 1 is at least two.

[0033] The input interface 41 of the first data acquisition unit 4 in the multiple data acquisition units is signal-connected to the control area network open CANOPEN interface 2 of the automobile development and test system, and the output interfaces of each data acquisition unit except the last data acquisition unit 5 are signal-connected to the input interface of the next data acquisition unit, and the output interface 51 of the last data acquisition unit 5 is electrically connected to the power supply 3, thereby forming a series structure. At this time, the total number of data acquisition modules 1 included in the multiple data acquisition units is at least two.

[0034] Continue to see Figure 2 Each data acquisition unit includes an MCU (Micro Controller Unit) 6 , a CAN (Controller Area Network) bus transceiver 7 , a communication interface circuit 8 and a data acquisition module 1 .

[0035] The microcontroller unit MCU6 is used to process the data collected by each data acquisition module 1, and can be a STMicroelectronics STM32H7 series. Exemplarily, the microcontroller unit MCU6 is an STMicroelectronics STM32H750 module.

[0036] The CAN (Controller Area Network) bus transceiver 7 is a communication interface for data acquisition unit and the CANOPEN interface of the automotive development and test system for data transmission. It has a built-in complete power isolation DC circuit, signal isolation circuit, CAN bus transceiver circuit and bus protection circuit, and has higher integration and reliability. It is suitable for occasions where high stability CAN bus communication is required. Preferably, the ZLG CTM051AHP high surge protection isolation CAN transceiver can be used, which supports a transmission baud rate of 40K~1Mbps.

[0037] The communication interface circuit 8 is the communication interface between the microcontroller unit MCU6 and the data acquisition module 1. Exemplarily, the communication interface circuit 8 can be an RS485 interface circuit. The RS485 interface circuit can use the single-power supply isolation type 485 chip ADM2587E of Analog Devices Semiconductor, which has a 2500V isolation voltage, supports full / half duplex, a transmission rate of 500K, a common-mode voltage suppression capability of 25KV / μS, and an electrostatic protection of ±15KV, and is suitable for various 485 isolation occasions such as industrial control and instrumentation. The bus end of the RS485 interface circuit is connected in series with a 4-10Ω overcurrent protection resistor on the + terminal and the - terminal, and a 6.8V transient voltage suppression diode is connected to the ground at the + terminal and the - terminal to provide certain protection for the bus.

[0038] Continue to see Figure 2 The control area network CAN bus transceiver 7 is signal-connected to the microcontroller unit MCU6, the microcontroller unit MCU6 is signal-connected to the communication interface circuit 8, the communication interface circuit 8 is signal-connected to each data acquisition module 1, wherein the microcontroller unit MCU6 includes a parsing code for the control area network open CANOPEN interface protocol.

[0039] The communication interface circuit 8 can be connected to each data acquisition module 1 by signal through the communication interface bus 9. The data acquisition module 1 can be a distributed industrial field bus IO (input output) module. When the communication interface circuit 8 is an RS485 interface circuit, the data acquisition module 1 can select a variety of RS485 bus data acquisition modules, such as DAQM-4203K thermocouple input module, DAQM-4201PT100 platinum resistance input module, and DAQM-4202AI analog input module.

[0040] Each data acquisition module 1 includes at least one measurement channel, and the number of measurement channels included in each data acquisition unit is less than a first preset number. Exemplarily, the first preset number is 16.

[0041] The total number of measurement channels included in all data acquisition units is less than or equal to a second preset number. Exemplarily, the second preset number is 126.

[0042] Moreover, the total number of measurement channels included in all data acquisition units is the same as the number of channels included in the control area network open CANOPEN interface protocol. Each measurement channel can be used as an independent node, and each node corresponds to a unique node ID (Identity document).

[0043] When the data acquisition device includes a data acquisition unit, the input interface 71 of the control area network CAN bus transceiver 7 of the data acquisition unit is signal-connected to the control area network open CANOPEN interface 2 of the automobile development test system, and the output interface 72 of the control area network CAN bus transceiver 7 is electrically connected to the power supply 3. At this time, the input interface 71 and the output interface 72 of the control area network CAN bus transceiver 7 are the input interface and the output interface of the data acquisition unit.

[0044] When the data acquisition device is composed of a plurality of data acquisition units connected in series, the input interface 71 of the CAN bus transceiver 7 of the first data acquisition unit 4 among the plurality of data acquisition units is signal-connected to the CAN OPEN interface 2 of the automobile development and test system, the output interface 72 of the CAN bus transceiver 7 of each data acquisition unit except the last data acquisition unit 5 is signal-connected to the input interface 71 of the CAN bus transceiver 7 of the next data acquisition unit, and the output interface 72 of the CAN bus transceiver 7 of the last data acquisition unit 5 is electrically connected to the power supply 3. At this time, the input interface 71 and the output interface 72 of the CAN bus transceiver 7 of the first data acquisition unit 4 are the input interface 41 and the output interface of the first data acquisition unit 4, and the input interface 71 and the output interface 72 of the CAN bus transceiver 7 of the last data acquisition unit 5 are the input interface and the output interface 51 of the last data acquisition unit 5.

[0045] Among them, the first data acquisition unit 4 is the data acquisition unit located at the first position when connected in series, and the last data acquisition unit 5 is the data acquisition unit located at the last position when connected in series. Any data acquisition unit among the multiple data acquisition units can be used as the first data acquisition unit 4 or the last data acquisition unit 5. The embodiment of the utility model does not impose any limitation on this, nor does it impose any limitation on the order of multiple data acquisition units when connected in series.

[0046] Therefore, when the data acquisition device includes one data acquisition unit, the signal transmission between the single data acquisition unit and the automobile development and test system is realized by signal connection between the input interface 71 of the control area network CAN bus transceiver 7 and the control area network open CANOPEN interface 2 of the automobile development and test system, and the output interface of the control area network CAN bus transceiver 7 is electrically connected to the power supply 3. When the data acquisition device is composed of multiple data acquisition units connected in series, the input interface 71 of the control area network CAN bus transceiver 7 of the first data acquisition unit 4 of the multiple data acquisition units is signal connected to the control area network open CANOPEN interface 2 of the automobile development and test system, the output interface 72 of the control area network CAN bus transceiver 7 of each data acquisition unit except the last data acquisition unit 5 is signal connected to the input interface 71 of the control area network CAN bus transceiver 7 of the next data acquisition unit, and the output interface 72 of the control area network CAN bus transceiver 7 of the last data acquisition unit 5 is electrically connected to the power supply 3, so as to form a series connection between multiple data acquisition units, thereby realizing signal transmission between multiple data acquisition units and the automobile development and test system.

[0047] The microcontroller unit MCU has a PDO (process data object) grouping function, wherein the process data object PDO grouping function is used to group the collected data of each measurement channel to generate process data object PDO data. The microcontroller unit MCU also has a node identity ID reporting control function, wherein the node identity ID reporting control function makes the order of the reported node identity IDs the same as the arrangement order of each measurement channel.

[0048] During operation, when the data acquisition device includes a data acquisition unit, after the data acquisition unit receives the reset signal sent by the automobile development and test system through the input interface 71 of the control local area network CAN bus transceiver 7, it reports the node ID of each measurement channel contained in it. After the automobile development and test system receives each node ID, it sends the parameter configuration information of each node to the data acquisition unit. After receiving the parameter configuration information of each node, the data acquisition unit configures the parameters of each measurement channel, and groups the collected data of each measurement channel to generate process data object PDO data and sends it to the automobile development and test system.

[0049] During operation, when the data acquisition device is composed of multiple data acquisition units connected in series, after receiving the reset signal sent by the automobile development test system through the input interface 71 of the control area network CAN bus transceiver 7 of the first data acquisition unit 4, the node ID of each measurement channel contained in it is reported. After the first data acquisition unit 4 completes the reporting, the next data acquisition unit can report the node ID of each measurement channel contained in it through the input interface 71 of its own control area network CAN bus transceiver 7, the output interface 72 of the control area network CAN bus transceiver 7 of the first data acquisition unit 4, and the input interface 71 of the control area network CAN bus transceiver 7 of the first data acquisition unit 4, and so on, until the last data acquisition unit 5 completes the reporting of the node ID. Among them, the reported node ID always corresponds to the arrangement order of the measurement channels.

[0050] After receiving the ID of each node, the automobile development and test system sends the parameter configuration information of each node to each data acquisition unit. After receiving the parameter configuration information of each node, each data acquisition unit configures the parameters of its own measurement channels, and groups the collected data of each measurement channel to generate process data object PDO data and sends it to the automobile development and test system. The automobile development and test system distinguishes the collected data of each measurement channel by the COB-ID (Communication Object Identifier) ​​of each received process data object PDO data.

[0051] In summary, the data acquisition device for an automobile development and test system provided by the embodiment of the utility model includes a data acquisition unit, or is composed of a plurality of data acquisition units connected in series, each data acquisition unit includes a microcontroller unit MCU, a control area network CAN bus transceiver, a communication interface circuit and a data acquisition module, the control area network CAN bus transceiver is signal-connected to the microcontroller unit MCU, the microcontroller unit MCU is signal-connected to the communication interface circuit, and the communication interface circuit is signal-connected to each data acquisition module; when the data acquisition device includes a data acquisition unit, the data acquisition unit includes at least two data acquisition modules, each data acquisition module is used to collect one type of data and the total types of data collected by all data acquisition modules are at least two, and the input interface of the control area network CAN bus transceiver of the data acquisition unit is signal-connected to the control area network open CANOPEN interface of the automobile development and test system. The output interface of the CAN bus transceiver of the control local area network is electrically connected to the power supply; when the data acquisition device is composed of multiple data acquisition units connected in series, the total number of data acquisition modules included in all data acquisition units is at least two, each data acquisition module is used to collect one type of data and the total type of data collected by all data acquisition modules is at least two, the input interface of the CAN bus transceiver of any one of the multiple data acquisition units is connected to the CANOPEN interface signal of the control local area network of the automobile development and test system, the output interface of the CAN bus transceiver of each data acquisition unit except the last data acquisition unit is connected to the input interface signal of the CAN bus transceiver of the next data acquisition unit, and the output interface of the CAN bus transceiver of the control local area network of the last data acquisition unit is electrically connected to the power supply. When the data acquisition device includes a data acquisition unit, the data acquisition unit includes at least two data acquisition modules, each data acquisition module is used to collect one type of data and the total types of data collected by all data acquisition modules are at least two; when the data acquisition device is composed of multiple data acquisition units connected in series, the total number of data acquisition modules included in all data acquisition units is at least two, each data acquisition module is used to collect one type of data and the total types of data collected by all data acquisition modules are at least two. Therefore, the automobile development test system provided by the embodiment of the utility model can collect multiple types of data, increase the application scenarios, and does not require additional data acquisition devices, thereby reducing the user's usage cost.

[0052] Those skilled in the art can understand that the accompanying drawings are only schematic diagrams of an embodiment, and the modules or processes in the accompanying drawings are not necessarily necessary for implementing the present utility model.

[0053] Those skilled in the art can understand that the modules in the device in the embodiment can be distributed in the device in the embodiment according to the description of the embodiment, or can be changed accordingly and located in one or more devices different from the embodiment. The modules in the above embodiment can be combined into one module, or can be further divided into multiple sub-modules.

[0054] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A data acquisition device for an automobile development test system, characterized in that: The data acquisition device includes a data acquisition unit, or is composed of a plurality of data acquisition units connected in series, each data acquisition unit includes a microcontroller unit MCU, a control area network CAN bus transceiver, a communication interface circuit and a data acquisition module, the control area network CAN bus transceiver is connected to the microcontroller unit MCU by signal, the microcontroller unit MCU is connected to the communication interface circuit by signal, and the communication interface circuit is connected to each data acquisition module by signal; When the data acquisition device includes a data acquisition unit, the data acquisition unit includes at least two data acquisition modules, each data acquisition module is used to collect one type of data and the total type of data collected by all data acquisition modules is at least two, the input interface of the control area network CAN bus transceiver of the data acquisition unit is connected to the control area network open CANOPEN interface signal of the automobile development test system, and the output interface of the control area network CAN bus transceiver is electrically connected to the power supply; When the data acquisition device is composed of multiple data acquisition units connected in series, the total number of data acquisition modules included in all data acquisition units is at least two, each data acquisition module is used to collect one type of data and the total types of data collected by all data acquisition modules are at least two, the input interface of the control local area network CAN bus transceiver of the first data acquisition unit among the multiple data acquisition units is connected to the control local area network open CANOPEN interface signal of the automobile development and test system, the output interface of the control local area network CAN bus transceiver of each data acquisition unit except the last data acquisition unit is connected to the input interface signal of the control local area network CAN bus transceiver of the next data acquisition unit, and the output interface of the control local area network CAN bus transceiver of the last data acquisition unit is electrically connected to the power supply.

2. The data acquisition device according to claim 1, characterized in that: Each data acquisition module includes at least one measurement channel, and the number of measurement channels included in each data acquisition unit is less than a first preset number.

3. The data acquisition device according to claim 2, characterized in that: The total number of measurement channels included in all data acquisition units is less than or equal to a second preset number.

4. The data acquisition device according to claim 1, characterized in that: The total number of measurement channels included in all data acquisition units is the same as the number of channels included in the control area network open CANOPEN interface protocol.

5. The data acquisition device according to claim 1, characterized in that: The communication interface circuit is an RS485 interface circuit.

6. The data acquisition device according to claim 1, characterized in that: The communication interface circuit is connected to each data acquisition module via a communication interface bus.

7. The data acquisition device according to claim 1, characterized in that: The data acquisition module is a distributed industrial field bus input and output IO module.

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