1. The utility model provides a many functional safety hardware test fixture which characterized in that includes:

the configurable first test connector is externally connected with the tested board card;

a configurable second test connector externally connected to the test instrument;

a configurable test configuration matrix connecting the first test connector and the second test connector.

2. The multifunctional safety hardware test fixture of claim 1, wherein the first test connector is provided with a plurality of test through holes according to European connector standard spacing;

the test through hole is externally connected with a tested board card through an external test cable and the European connector; or

The test through holes are externally connected with the tested board card through the external test cables and the standard pins.

3. The device of claim 1, wherein the first test connector connects the test configuration matrix via internal through test leads.

4. The device of claim 1, wherein the test configuration matrix is configured to connect the second test connector using jumper wires.

5. The tool of claim 1, wherein each group of test points in the test configuration matrix comprises: test lead points, through connection test points, pull-up test points and pull-down test points,

the test lead point is selected to be in jumper connection with any test point of the through connection test point, the pull-up test point or the pull-down test point;

the through connection test point is directly connected with the second test connector;

injecting a signal to fix a high level or short circuit to a power failure through the pull-up test point;

injecting a signal through the pull-down test point to fix a low level or short to ground fault.

6. The tool of claim 1, wherein each group of test points in the test configuration matrix comprises: the test lead point and a plurality of test connection points are respectively connected with the test lead point;

the test lead and the test connection point are isolated from each other to meet the requirement of safety specification and reinforced insulation standard;

and one test connection point in a plurality of groups of test point groups belonging to the same packet network is connected with the same test channel of the second test connector in a jumper way.

Background

In the functional safety field, various hardware verification tests are required to be performed according to safety standard specifications in the development, test, verification and confirmation process of functional safety hardware, and the tests comprise high voltage tests, insulation impedance tests, functional tests, performance tests, hardware fault injection tests and other different tests. In the existing research and development testing process, different testing jigs are often designed by testers or different tests are carried out by manually modifying tested hardware boards aiming at different tests in different stages, a large amount of manpower and material resources are consumed in the testing process, different testing environments are required to be set up aiming at different tests, the testing jigs are not universal, and the testing efficiency is low. Such as: high-voltage testing and insulation impedance testing, wherein special test board cards are designed aiming at different hardware board cards, and different groups of networks are led out of a test network through the test board cards; aiming at the function and performance test, a set of different test board cards are required to be designed to introduce test excitation signals and to introduce test objects for test observation; when the hardware fault injection test is performed, because different hardware single-point faults need to be simulated according to the standard, the injection fault and the recovery fault are frequently required to be manually and repeatedly reconstructed on the tested hardware board card.

Disclosure of Invention

The invention aims to provide a multifunctional safety hardware testing jig which has universality for different hardware board card types, supports various hardware tests, can reduce the cost of manpower and material resources in the testing process and greatly improves the testing work efficiency.

The technical scheme for realizing the purpose is as follows:

a many functional safety hardware test fixture includes:

the configurable first test connector is externally connected with the tested board card;

a configurable second test connector externally connected to the test instrument;

a configurable test configuration matrix connecting the first test connector and the second test connector.

Preferably, the first test connector is provided with a plurality of test through holes according to the standard spacing of the European connector;

the test through hole is externally connected with a tested board card through an external test cable and the European connector; or

The test through holes are externally connected with the tested board card through the external test cables and the standard pins.

Preferably, the first test connector connects the test configuration matrix through internal through test leads.

Preferably, the test configuration matrix is connected to the second test connector in a jumper-through manner.

Preferably, each group of test points in the test configuration matrix includes: test lead points, through connection test points, pull-up test points and pull-down test points,

the test lead point is selected to be in jumper connection with any test point of the through connection test point, the pull-up test point or the pull-down test point;

the through connection test point is directly connected with the second test connector;

injecting a signal to fix a high level or short circuit to a power failure through the pull-up test point;

injecting a signal through the pull-down test point to fix a low level or short to ground fault.

Preferably, each group of test points in the test configuration matrix includes: the test lead point and a plurality of test connection points are respectively connected with the test lead point;

the test lead and the test connection point are isolated from each other to meet the requirement of safety specification and reinforced insulation standard;

and one test connection point in a plurality of groups of test point groups belonging to the same packet network is connected with the same test channel of the second test connector in a jumper way.

The invention has the beneficial effects that: the universal standard space test through hole is used for configuring the test connector or the test cable, and the universal standard space test through hole has universality for different hardware board card types. Through the configurable test matrix on the test device, the jumper is used for realizing different test configurations, which can support: functional performance test, high-voltage insulation test, hardware fault injection test and the like. Manpower and material resources for designing and deploying different testing jigs and manually modifying tested hardware can be saved, and the testing efficiency is improved.

Drawings

FIG. 1 is a diagram of a multifunctional safety hardware testing fixture according to the present invention;

FIG. 2 is a schematic view of a 3U test extension of the present invention;

FIG. 3 is a view showing the arrangement of a 6U test extension plate according to the present invention;

FIG. 4 is a diagram of a hardware fault injection test board configuration according to the present invention;

FIG. 5 is a diagram of a high voltage insulation test arrangement according to the present invention.

Detailed Description

The invention will be further explained with reference to the drawings.

In the development, verification and test process of functional safety hardware, various test verifications such as high-voltage test, insulation resistance test, functional test, performance test, hardware fault injection test and the like are required. In actual research and development tests, complicated manual modification of tested hardware is often needed, or a plurality of different test jigs are designed for testing, so that the cost is high, and the efficiency is low. The multifunctional safety hardware test fixture can be used for various tests, has universality aiming at different hardware board card types, can save manpower and material resources for designing and deploying different test fixtures and manually modifying tested hardware, and simultaneously improves the test efficiency.

Referring to fig. 1, the present invention provides a multifunctional safety hardware testing fixture, which includes: a first test connector 1, a second test connector 2, a test configuration matrix 3.

The first test connector 1 is uniformly provided with a plurality of test through holes, such as universal standard pitch (2.54mm) test through holes, and different types of boards to be tested are connected through configurable test connectors or test cables.

For the tested board card using the standard european connector, a corresponding mating european connector can be directly mounted on the first test connector 1 according to the type of the card connector of the tested board card, and the connection is performed by using an external test cable.

For the connection with the non-standard connector, the standard pin header can be installed on the first test connector 1, and then the card is connected with the tested board through the external test cable, and the test cable connected with the tested board needs to meet the requirement of strengthening insulation.

The first test connector 1 is connected to the test configuration matrix 3 by means of internal through-going test leads. The test configuration matrix 3 is composed of test through holes with standard spacing, and different types of hardware tests can be supported through different test jumper configurations.

For example: fig. 2 shows a test configuration supporting functional tests and performance tests of a 3U extension board, in which a first test connector 1(J1) is configured as a 5 × 32 standard test through hole, C1 is a test lead with internal through holes, the distance between the internal test leads meets the requirement of an insulation gap and is greater than 2.54mm, a test configuration matrix 3(S1) is directly connected to a second test connector 2(J2) by using a jumper, and the second test connector 2 is connected to a test instrument by an external test cable. A standard 6U test extension board may be extended using a similar configuration, see fig. 3. In fig. 3, J3, C2, S2 and J4 correspond to J1, C1, S1 and J2 in fig. 2, respectively.

The main difference between the hardware fault injection test configuration and the test extension board configuration described above is in the configuration test matrix portion. As shown in fig. 4, each test point group in the test configuration matrix 3 includes: test lead point E0, through connection test point E2, pull-up test point E1, and pull-down test point E3.

The test lead point E0 is connected to the through connection test point E2, and the through connection test point E2 is directly connected to the second test connector 2, and may be directly connected to an external test instrument, through which a normal excitation signal or an abnormal oscillation excitation signal may be injected. If the short jumper of E0 and E2 is opened, a signal open fault may be injected. In addition to the pass-through test point E2, a pull-up test point E1 and a pull-down test point E3 are added, which can inject a fixed high level of signal or short to power failure (pull-up resistance selected to be 0 ohms or short) if E0 and E1 are connected. A fixed low signal or short to ground fault (pull down resistor selected to be 0 ohms or short) may be injected if E0 and E3 are connected. Therefore, by simulating jumper short-circuiting different network test lead points E0 (or straight-through test point E2), the fault of short-circuiting between two network channels can be simulated; the invention can conveniently carry out injection test and fault recovery of single-point faults, can also carry out injection test and recovery of multi-point faults, and can greatly improve the injection test efficiency of hardware faults.

The high voltage isolation and insulation resistance test configuration is shown in fig. 5, which differs from the test extension board configuration described above primarily in the mating relationship of the test lead points and the test connection points. For testing extension boards, test points are correspondingly connected one by one according to a through connection test relation, and for high-voltage isolation and insulation impedance testing, different groups need to be connected according to safety hardware requirements. At this time, each test point group in the test configuration matrix 3 includes: a test lead point, and a plurality of test connection points (a0 …, B0 …, C0 …, D0 …, E0 …) respectively connected to the test lead point. One test connection point in a plurality of test point groups belonging to the same packet network is jumper-connected with the same test channel of the second test connector 2. For example: if a group of the same packet networks is used according to the hardware requirements a0, B3, C12 and D6, these four points are connected to the same test channel of the second test connector 2(J2) by jumpers. Considering the general hardware grouping requirements and tester channel limitations, the second test connector 2(J2) in fig. 5 only draws 32 channels (the general complexity board test does not exceed 32 channels), which is scalable up to 160 test channels at maximum. The test lead and the test connection point are isolated from each other to meet the requirement of safety specification and reinforced insulation standard.

In summary, for the function and performance test, the input of test excitation to the board to be tested and the test to the led-out test object are performed by configuring the through test configuration matrix. The high-voltage test and the insulation impedance test can be carried out by configuring a jumper or other short-circuit methods to carry out different channel network combination tests. For hardware fault injection test, the fault modes of open circuit, short circuit to a power supply, short circuit to the ground, short circuit between different signals, signal oscillation and the like can be simulated through the configuration matrix, only the jumper wire of the test configuration matrix needs to be changed, the operation is convenient and simple, the working efficiency can be greatly improved, and the test cost is reduced.

The above embodiments are provided only for illustrating the present invention and not for limiting the present invention, and those skilled in the art can make various changes and modifications without departing from the spirit and scope of the present invention, and therefore all equivalent technical solutions should also fall within the scope of the present invention, and should be defined by the claims.