CN202870623U

CN202870623U - Universal test fixture for automotive body electronic unit

Info

Publication number: CN202870623U
Application number: CN 201220623650
Authority: CN
Inventors: 马建辉; 刘源杨; 庄汝科; 车晓波; 王岗; 王明月
Original assignee: Institute of Automation Shandong Academy of Sciences
Current assignee: Institute of Automation Shandong Academy of Sciences
Priority date: 2012-11-22
Filing date: 2012-11-22
Publication date: 2013-04-10
Anticipated expiration: 2022-11-22

Abstract

The utility model discloses a universal test fixture for an automotive body electronic unit, and the universal test fixture comprises an upper computer and a lower computer, wherein the upper computer is communicated with the lower computer via a USB (universal serial bus) connection wire; the lower computer is further provided with a multi-path digital input port, a multi-path digital output port, an eight-path pulse input port, an eight-path PWM (pulse-width modulation) output port, a two-path CAN (controller area network) bus interface, a two-path LIN (local interconnect network) bus interface, a programmable power supply, an embedded minimum system, a parallel-to-serial interface and a serial-to-parallel interface; and a signal from the multi-path digital input port is conveyed in the parallel-to-serial interface, and a signal from the serial-to-parallel interface is conveyed in the multi-path digital output port. Via different connection modes for the upper computer with the detected unit, a test during a development process for the detected automotive electronic unit and a test during a production process can be realized, and tests for different automotive electronic units can also be realized.

Description

The universal test frock of body of a motor car electronic unit

Technical field

The utility model relates to technical field of automotive electronics, relates in particular to the universal test frock of body of a motor car electronic unit.

Background technology

Designing and developing in the process of body of a motor car electronic unit, test platform carries out the checking of function and the assessment of performance is very important ingredient by building, it is the information feedback source in the design iteration process, also is the important means whether checking body electronics unit meets functional requirement.In the batch production process of body electronics unit, need to carry out some functional tests and Performance Evaluation to the product of producing to guarantee product quality, and satisfy on the production line requirement of fast beat, test fixture is as important production management instrument, and it can efficient, the complete quality of production that must pass judgment on unit under test.

The build process of test platform and complexity depend on the signal properties of function, working method and the IO interface thereof of the body electronics unit of developing, for the body electronics unit, property class like and IO interface can be encompassed in the scope of switch, pulse, bus communication, radio communication and power drive.General data I/O card, the communication card of selecting on stream special-purpose costliness, and test platform is built in complicated manual test and the automatic test of exploitation, and in process of production because the restriction of cost and the requirement of testing efficiency, test platform in the performance history no longer is fit to use as test fixture, need again development and testing frock, so just have the overlapping development problem on the part degree.

Existing test fixture patent all lays stress on structural design, the probe design of test fixture, and with unit under test be connected and fixed form on, and seldom relate to design of hardware and software as the test fixture of embedded device itself.

Existing embedded testing frock is generally developed for specific products, can't be used for the production test of other products, because the characteristic of vehicle body list unit, the similarity of IO interface, also there is similarity to a certain degree in the test fixture of different body electronics unit, because the cycle of present test fixture embedded development is long, difficulty is larger, and also there is overlapping development problem to a certain extent in the test fixture that designs respectively for a plurality of body electronics unit so.

The utility model content

The purpose of this utility model is exactly in order to address the above problem, the universal test frock of body of a motor car electronic unit is provided, by the host computer connected mode different from unit under test, not only can realize to realize the test to different automotive electronics unit to the test in the tested automotive electronics unit performance history and the test in the production run.

For achieving the above object, the utility model adopts following technical scheme:

A kind of universal test frock of body of a motor car electronic unit, comprise host computer and slave computer, described host computer is communicated by letter by the USB connecting line with slave computer, host computer and slave computer all are provided with USB interface, described slave computer also be provided with multi-path digital input port, multi-path digital output port, eight road pulse input end mouths, eight-path PWM output port, 2 road CAN bus interface, 2 road LIN bus interface, Programmable power supply, Embedded Minimum System and turn serial connection mouthful, string turns and interface; Wherein, the signal of multi-path digital input port imports into and turns the serial connection mouth, and string turns and the signal of interface imports the multi-path digital output port into.

The digital output port signal of unitunder test imports the multi-path digital input port of slave computer into, the switch input terminal mouth of unitunder test receives signal from the multi-path digital output port of slave computer, the PWM output port of unitunder test imports signal in eight road pulse input end mouths of slave computer, the pulse input end mouth of unitunder test receives signal from the eight-path PWM output port of slave computer, 2 road CAN bus interface two-way communications of the CAN bus interface of unitunder test and slave computer, 2 road LIN bus interface two-way communications of the LIN bus interface of unitunder test and slave computer, the Programmable power supply of slave computer is to the power supply power supply of unitunder test; One end of described USB connecting line inserts the USB interface of host computer, and the other end of described USB connecting line inserts the USB interface of slave computer.

Pulse input end mouth host computer and slave computer communicate by hi-speed USB interface, that at first selects slave computer signalling channel and unit under test is connected corresponding relation and connected mode, set up the physical connection with unitunder test, then host computer downloads to the configuration of signalling channel interface in the slave computer, and slave computer is according to the initialization operation of the signalling channel Configuration signalling channel corresponding with the IO interface of unit under test.Then according to selected test item, host computer sends to slave computer with test command, signalling channel, signal content and command parameter, the slave computer resolve command, according to command selection specific signalling channel is processed, then to state and the content of host computer feed-back channel, test the processing of phenomenon and the judgement of test result by host computer.

The beneficial effects of the utility model are:

1, the test platform of building in the development phase of product suitably can be directly used in the production run test after the cutting;

2, the mode that combines with host computer and slave computer take full advantage of the convenience of PC Human Machine Interface and greatly abundant tool set, and the powerful embedded real-time handling property of slave computer connects extensibility with being connected;

3, adopt with use relevant host computer and with the structure of using the slave computer that has nothing to do, guaranteed that test fixture can for development and testing and the production test of a plurality of products, expand the scope of application of test fixture better;

4, the power supply of program-controlled unit under test, the hot line job when having avoided test fixture and unit under test to set up physical connection can be used for the functional test item that the unit under test automatic power down powers on again simultaneously.

Description of drawings

Fig. 1 is test fixture structural drawing of the present utility model.

Embodiment

The utility model is described in further detail below in conjunction with accompanying drawing and embodiment.

As shown in Figure 1, a kind of universal test frock of body of a motor car electronic unit, comprise host computer and slave computer, described host computer is communicated by letter by the USB connecting line with slave computer, host computer and slave computer all are provided with USB interface, described slave computer also be provided with multi-path digital input port, multi-path digital output port, eight road pulse input end mouths, eight-path PWM output port, 2 road CAN bus interface, 2 road LIN bus interface, Programmable power supply, Embedded Minimum System and turn serial connection mouthful, string turns and interface; Wherein, the signal of multi-path digital input port imports into and turns the serial connection mouth, and string turns and the signal of interface imports the multi-path digital output port into.

The digital output port signal of unitunder test imports the multi-path digital input port of slave computer into, the switch input terminal mouth of unitunder test receives signal from the multi-path digital output port of slave computer, the PWM output port of unitunder test imports signal in eight road pulse input end mouths of slave computer, the pulse input end mouth of unitunder test receives signal from the eight-path PWM output port of slave computer, the CAN bus interface of unitunder test and 2 road CAN bus interface two-way communications, LIN bus interface and 2 road LIN bus interface two-way communications, the Programmable power supply of slave computer is to the power supply power supply of unitunder test.

One end of described USB connecting line inserts the USB interface of host computer, and the other end of described USB connecting line inserts the USB interface of slave computer.

Host computer and slave computer communicate by hi-speed USB interface, that at first selects slave computer signalling channel and unit under test is connected corresponding relation and connected mode, set up the physical connection with unitunder test, then host computer downloads to the configuration of signalling channel interface in the slave computer, and slave computer is according to the initialization operation of the signalling channel Configuration signalling channel corresponding with the IO interface of unit under test.Then according to selected test item, host computer sends to slave computer with test command, signalling channel, signal content and command parameter, the slave computer resolve command, according to command selection specific signalling channel is processed, then to state and the content of host computer feed-back channel, test the processing of phenomenon and the judgement of test result by host computer.

Although above-mentionedly by reference to the accompanying drawings embodiment of the present utility model is described; but be not the restriction to the utility model protection domain; one of ordinary skill in the art should be understood that; on the basis of the technical solution of the utility model, those skilled in the art do not need to pay various modifications that creative work can make or distortion still in protection domain of the present utility model.

Claims

1. the universal test frock of a body of a motor car electronic unit, it is characterized in that, comprise host computer and slave computer, described host computer is communicated by letter by the USB connecting line with slave computer, described slave computer also be provided with multi-path digital input port, multi-path digital output port, eight road pulse input end mouths, eight-path PWM output port, 2 road CAN bus interface, 2 road LIN bus interface, Programmable power supply, Embedded Minimum System and turn serial connection mouthful, string turns and interface; Wherein, the signal of multi-path digital input port imports into and turns the serial connection mouth, and string turns and the signal of interface imports the multi-path digital output port into.

2. the universal test frock of a kind of body of a motor car electronic unit as claimed in claim 1, it is characterized in that, the digital output port signal of unitunder test imports the multi-path digital input port of slave computer into, the switch input terminal mouth of unitunder test receives signal from the multi-path digital output port of slave computer, the PWM output port of unitunder test imports signal in eight road pulse input end mouths of slave computer, the pulse input end mouth of unitunder test receives signal from the eight-path PWM output port of slave computer, 2 road CAN bus interface two-way communications of the CAN bus interface of unitunder test and slave computer, 2 road LIN bus interface two-way communications of the LIN bus interface of unitunder test and slave computer, the Programmable power supply of slave computer is to the power supply power supply of unitunder test; One end of described USB connecting line inserts the USB interface of host computer, and the other end of described USB connecting line inserts the USB interface of slave computer.