CN204595128U - A kind of direct fault location plate - Google Patents
A kind of direct fault location plate Download PDFInfo
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- CN204595128U CN204595128U CN201520317193.3U CN201520317193U CN204595128U CN 204595128 U CN204595128 U CN 204595128U CN 201520317193 U CN201520317193 U CN 201520317193U CN 204595128 U CN204595128 U CN 204595128U
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- input end
- slide rheostat
- fault location
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Abstract
Originally provide a kind of direct fault location plate, comprise the first test channel and the second test channel; Described first test channel comprises first input end, the first change-over switch, the first original signal input end and Fisrt fault injection side; Described Fisrt fault injection side is first input end or described first original signal input end according to the selection conducting of described first change-over switch; Described second test channel comprises the second input end, slide rheostat assembly, the second change-over switch, the second original signal input end and the second direct fault location end; Described slide rheostat component string is associated between described second input end and the second change-over switch; Described second direct fault location end second original signal input end according to the selection conducting of described second change-over switch, or conducting and described slide rheostat assembly.Can the common 8 kinds of faults of mimic channel, meet distinct device fault simulation and testing requirement, practicality is stronger.
Description
Technical field
The utility model relates to a kind of direct fault location plate.
Background technology
Failure Injection Technique is a kind of important means of tolerant system reliability demonstration test, it is according to fault type known in advance, directly fault (hardware/software) is incorporated in tested goal systems by people for taking some means, thus shorten the latent period of fault, accelerate the failure procedure of system.
Direct fault location has multiple different sorting technique.Herein from direct fault location object angle, be divided into the method based on simulation and the large class of the method two based on prototype.Fault filling method based on simulation adopts the hardware description language of certain standard (such as VHDL language) to set up the analogy model of goal systems usually, the model set up carries out the direct fault location of different stage, transistor switch level, logic level and functional level three kinds can be subdivided into again according to its level applied.Fault filling method based on prototype has deposited in case at system prototype, the fault that simulation system likely occurs in true environment, this fault is applied on the target system, according to the difference of concrete enforcement means, physical implementation, hardware implementation and implement software three major types can be further divided into, under various enforcement means, different implementation tools can be had again.
The common 8 kinds of faults of circuit: open circuit, short circuit, solid high, solid low, line and line overlap resistance, line and power supply overlap resistance, line and ground overlap resistance and output error, are badly in need of a kind of direct fault location plate that various faults can be provided to inject.
Utility model content
For defect of the prior art, the purpose of this utility model is to provide a kind of direct fault location plate.
According to a kind of direct fault location plate that the utility model provides, comprise the first test channel and the second test channel;
Described first test channel comprises first input end, the first change-over switch, the first original signal input end and Fisrt fault injection side; Described Fisrt fault injection side is first input end or described first original signal input end according to the selection conducting of described first change-over switch;
Described second test channel comprises the second input end, slide rheostat assembly, the second change-over switch, the second original signal input end and the second direct fault location end; Described slide rheostat component string is associated between described second input end and the second change-over switch; Described second direct fault location end second original signal input end according to the selection conducting of described second change-over switch, or conducting and described slide rheostat assembly.
As a kind of prioritization scheme, described slide rheostat assembly comprises coarse adjustment slide rheostat and fine tuning slide rheostat; One end of described coarse adjustment slide rheostat connects described second input end, and the other end connects described fine tuning slide rheostat; One end of described fine tuning slide rheostat connects described coarse adjustment slide rheostat, and the other end connects described second change-over switch.
As a kind of prioritization scheme, described slide rheostat assembly comprises coarse adjustment slide rheostat and fine tuning slide rheostat; One end of described fine tuning slide rheostat connects described second input end, and the other end connects described coarse adjustment slide rheostat; One end of described coarse adjustment slide rheostat connects described fine tuning slide rheostat, and the other end connects described second change-over switch.
As a kind of prioritization scheme, described first test channel also comprises the first signal generator, and described first signal generator is connected with described first input end.
As a kind of prioritization scheme, described second test channel also comprises grounding circuit, and described grounding circuit is connected with described second input end.
As a kind of prioritization scheme, described second test channel also comprises feed circuit, and described feed circuit are connected with described second input end.
As a kind of prioritization scheme, described second test channel also comprises secondary signal generator, and described secondary signal generator is connected with described second input end.
As a kind of prioritization scheme, the quantity of described first test channel is at least one.
As a kind of prioritization scheme, the quantity of described second test channel is at least one.
Compared with prior art, the utility model has following beneficial effect:
The utility model is compared with the Fault Insertion Equipment of existing analog circuit fault, structure is simple, easy to operate, can the common open circuit of mimic channel, short circuit, solid high, solid low, line and line overlap resistance, line and power supply overlap resistance, line and ground overlap resistance and output error 8 kinds of faults, can meet distinct device fault simulation and testing requirement, practicality is stronger.
Accompanying drawing explanation
By reading the detailed description done non-limiting example with reference to the following drawings, other features, objects and advantages of the present utility model will become more obvious:
Fig. 1 is a kind of direct fault location plate structure schematic diagram in embodiment.
Wherein, 1-first input end, 2-first original signal input end, 3-Fisrt fault injection side, 4-first change-over switch, 5-second input end, 6-second original signal input end, 7-second direct fault location end, 8-second change-over switch, 9-slide rheostat assembly.
Embodiment
Below in conjunction with specific embodiment, the utility model is described in detail.Following examples will contribute to those skilled in the art and understand the utility model further, but not limit the utility model in any form.It should be pointed out that to those skilled in the art, without departing from the concept of the premise utility, some distortion and improvement can also be made.These all belong to protection domain of the present utility model.
According to a kind of direct fault location plate that the utility model provides, as shown in Figure 1, the first test channel and the second test channel is comprised;
Described first test channel comprises first input end 1, first change-over switch 4, first original signal input end 2 and Fisrt fault injection side 3; Described Fisrt fault injection side 3 is first input end 1 or described first original signal input end 2 according to the selection conducting of described first change-over switch 4;
Described second test channel comprises the second input end 5, slide rheostat assembly 9, second change-over switch 8, second original signal input end 6 and the second direct fault location end 7; Described slide rheostat assembly 9 is connected between described second input end 5 and the second change-over switch 8; Described second direct fault location end 7 is second original signal input end 6 according to the selection conducting of described second change-over switch 8, or conducting and described slide rheostat assembly 9.
In described first test channel, as shown in Figure 1, the A1 end of the first change-over switch 4 is connected with described first original signal input end 2, and B1 end is connected with described Fisrt fault injection side 3, C1 end and described first input end 1.
The B1 end of the first change-over switch 4 is held with A1 and is connected under normal circumstances, and the first original signal input end 2 inputs the original input signal of circuit-under-test, and Fisrt fault injection side 3 exports this original input signal the failed access points of fault circuit-under-test to.Because input signal does not change, this circuit-under-test keeps original state, normally works.
When needs inject fault, the B1 end of the first change-over switch 4 switches to hold with C1 and is connected, thus the external signal of first input end 1 is exported to the failed access points of circuit-under-test, by change external input signal by the Fault Insertion Equipment of needs.External input signal in the present embodiment is square wave, sine wave etc.
When needing to inject open fault, the signal connected by disconnecting first input end 1 realizes.
In the second test channel, as shown in Figure 1, the second A2 end switched is connected with the second original signal input end 6, and B2 end is connected with described second direct fault location end 7, C2 end is connected with described slide rheostat assembly 9, and this slide rheostat assembly 9 is connected with the second input end 5 again.
Short circuit and line and line overlap resistance, solid high and line and power supply overlap resistance, solid low and overlap resistance between line and ground, these three pairs of faults are by the device that changes the second input end 5 and connect and use slide rheostat assembly 9 to regulate the overlap resistance in the second test channel to realize.
When realizing overlap resistance and being 0 Ω, short circuit, solid high and solid these three kinds of fault modes low can be realized.
When regulating slide rheostat to make overlap resistance not be 0 Ω, namely realize line and line overlap resistance, line and power supply overlap resistance, overlap resistance three kinds of faults between line and ground.
Regulate slide rheostat can change the resistance of overlap resistance, thus multiple overlap resistance type can be realized.
Output error, the output after main analog device parameter shift and overlap the fault modes such as other external signals,
As a kind of embodiment, described slide rheostat assembly 9 comprises coarse adjustment slide rheostat and fine tuning slide rheostat; One end of described coarse adjustment slide rheostat connects described second input end 5, and the other end connects described fine tuning slide rheostat; One end of described fine tuning slide rheostat connects described coarse adjustment slide rheostat, and the other end connects described second change-over switch 8.
As a kind of embodiment, described slide rheostat assembly 9 comprises coarse adjustment slide rheostat and fine tuning slide rheostat; One end of described fine tuning slide rheostat connects described second input end 5, and the other end connects described coarse adjustment slide rheostat; One end of described coarse adjustment slide rheostat connects described fine tuning slide rheostat, and the other end connects described second change-over switch 8.
As a kind of embodiment, described first test channel also comprises the first signal generator, and described first signal generator is connected with described first input end 1.
As a kind of embodiment, described second test channel also comprises grounding circuit, and described grounding circuit is connected with described second input end 5.
As a kind of embodiment, described second test channel also comprises feed circuit, and described feed circuit are connected with described second input end 5.
As a kind of embodiment, described second test channel also comprises secondary signal generator, and described secondary signal generator is connected with described second input end 5.
As a kind of embodiment, the quantity of described first test channel is at least one.
As a kind of embodiment, the quantity of described second test channel is at least one.A direct fault location plate may comprise multiple first test channel and multiple second test channel, second input end 5 of each second test channel can select connection signal generator according to the fault of required injection, or ground wire, or power supply, can realize thus simultaneously to the direct fault location of the multiple position to be measured of circuit-under-test.
As a kind of implementation step, as follows:
Step 1: determine direct fault location type
According to the fault that tested electronics/electrically/programmable electronic system (E/E/PES) is possible, select to need the fault simulating which device or circuit, determine concrete fault type.
Step 2: determine direct fault location point
According to the fault that need simulate, select suitable direct fault location point.4 place's direct fault location points are set in the present embodiment.
Step 3: with the connection of direct fault location plate
By the first original signal input end 2, the Fisrt fault injection side 3 of direct fault location plate, and/or the second original signal input end 6, second direct fault location end 7 is connected with the direct fault location point chosen respectively.A direct fault location point connects the first original signal input end 2 and Fisrt fault injection side 3 described in a pair, and other 3 direct fault location points connect other three respectively to the second original signal input end 6 and the second direct fault location end 7.
First disconnected from direct fault location point by circuit, the two ends of direct fault location point are divided into original signal output terminal and original signal input end by original directions of signal flow.Original signal output terminal connects the first original signal input end 2 or the second original signal input end 6 of direct fault location plate.Original signal input end connects Fisrt fault injection side 3 or the second direct fault location end 7 of direct fault location plate.
Step 4: inject fault
Run circuit-under-test, under original state, in the first change-over switch 4 and the second change-over switch 8, A end (A1, A2) all holds (B1, B2) to be connected conducting with B, original signal output terminal and the conducting of original signal input end, circuit-under-test normally works.When needs inject fault, the first change-over switch 4 and the second change-over switch 8B hold (B1, B2) to hold (C1, C2) to be connected conducting with C, just can by the Fault Insertion Equipment of needs.
The method of 8 kinds of fault realizations is as follows:
(1) open fault
Open fault is realized by the signal disconnected.At the direct fault location point place of connection first original signal input end 2, Fisrt fault injection side 3, by vacant for described first input end 1, do not connect any device.When needing this road signal to occur open fault in circuit operational process, the B1 end of the first change-over switch 4 is held with C1 and is connected conducting, can at direct fault location point simulation open fault.
(2) short circuit and overlap resistance fault between line and line
Second input end 5 is connected with another signal wire or signal generator, ensures signal input.When needs simulate this road signal there is short trouble time, regulate slide rheostat assembly 9 to make the overlap resistance between them be 0 Ω, then change the second change-over switch 8 and B2 is held to hold with C2 to be connected, the short trouble with another signal can be simulated.
(3) overlap resistance fault between line and line
Second input end 5 is connected with another signal wire or signal generator, ensures signal input.Regulate slide rheostat assembly 9 to make the overlap resistance between them not be 0 Ω, then change the second change-over switch 8 and B2 is held to hold with C2 to be connected, get final product overlap resistance fault between artificial line and line.Wherein regulate coarse adjustment slide rheostat and fine tuning slide rheostat can realize the fine adjustment of overlap resistance.
(4) solid high fault
Second input end 5 is connected with the operating voltage input point of circuit-under-test, or is connected with the feed circuit of a predeterminated voltage.When needs inject solid high fault, regulate slide rheostat assembly 9 to make the overlap resistance between them be 0 Ω, then change the second change-over switch 8 and B2 is held to hold with C2 to be connected, admittedly high fault can be simulated.
(5) overlap resistance fault between line and power supply
Second input end 5 is connected with the operating voltage input point of circuit-under-test, or is connected with the feed circuit of a predeterminated voltage.When needs inject overlap resistance fault between line and power supply, regulate slide rheostat assembly 9 to make the overlap resistance between them not be 0 Ω, then change the second change-over switch 8 and B2 is held to hold with C2 to be connected, get final product overlap resistance fault between artificial line and power supply.
(6) solid low fault
Second input end 5 is connected with the earth point of circuit-under-test, or is connected with a grounding circuit.When needs inject solid high fault, regulate slide rheostat assembly 9 to make the overlap resistance between them be 0 Ω, then change the second change-over switch 8 and B2 is held to hold with C2 to be connected, admittedly low fault can be simulated.
(7) overlap resistance fault between line and ground
Second input end 5 is connected with the earth point of circuit-under-test, or is connected with a grounding circuit.When needs inject solid high fault, regulate slide rheostat assembly 9 to make the overlap resistance between them not be 0 Ω, then change the second change-over switch 8 and B2 is held to hold with C2 to be connected, get final product overlap resistance fault between artificial line and ground.
(8) fault is exported
Output after analog device parameter drift and overlap the fault modes such as other external signals is generally, more difficult with circuit realiration.The method that this direct fault location plate uses is: the signal produced by a signal generator connects the first input end 1 of direct fault location plate, can simulate polytype output error by the output signal changing signal generator.When occurring when needing this road signal in circuit operational process exporting fault, signalization generator output signal type, then changes the first change-over switch 4 and B1 is held to hold with C1 to be connected, can simulate multiple output fault.
Direct fault location plate in the present embodiment can be used as minimum direct fault location unit, and when needs inject multichannel same fault or multichannel different faults simultaneously, multiple direct fault location plate can in parallelly use, and selects multi-way switch to realize injecting fault simultaneously.
Above specific embodiment of the utility model is described.It is to be appreciated that the utility model is not limited to above-mentioned particular implementation, those skilled in the art can make various distortion or amendment within the scope of the claims, and this does not affect flesh and blood of the present utility model.
Claims (9)
1. a direct fault location plate, is characterized in that, comprises the first test channel and the second test channel;
Described first test channel comprises first input end, the first change-over switch, the first original signal input end and Fisrt fault injection side; Described Fisrt fault injection side is first input end or described first original signal input end according to the selection conducting of described first change-over switch;
Described second test channel comprises the second input end, slide rheostat assembly, the second change-over switch, the second original signal input end and the second direct fault location end; Described slide rheostat component string is associated between described second input end and the second change-over switch; Described second direct fault location end second original signal input end according to the selection conducting of described second change-over switch, or conducting and described slide rheostat assembly.
2. a kind of direct fault location plate according to claim 1, is characterized in that, described slide rheostat assembly comprises coarse adjustment slide rheostat and fine tuning slide rheostat; One end of described coarse adjustment slide rheostat connects described second input end, and the other end connects described fine tuning slide rheostat; One end of described fine tuning slide rheostat connects described coarse adjustment slide rheostat, and the other end connects described second change-over switch.
3. a kind of direct fault location plate according to claim 1, is characterized in that, described slide rheostat assembly comprises coarse adjustment slide rheostat and fine tuning slide rheostat; One end of described fine tuning slide rheostat connects described second input end, and the other end connects described coarse adjustment slide rheostat; One end of described coarse adjustment slide rheostat connects described fine tuning slide rheostat, and the other end connects described second change-over switch.
4. a kind of direct fault location plate according to claim 1, is characterized in that, described first test channel also comprises the first signal generator, and described first signal generator is connected with described first input end.
5. a kind of direct fault location plate according to claim 1, is characterized in that, described second test channel also comprises grounding circuit, and described grounding circuit is connected with described second input end.
6. a kind of direct fault location plate according to claim 1, is characterized in that, described second test channel also comprises feed circuit, and described feed circuit are connected with described second input end.
7. a kind of direct fault location plate according to claim 1, is characterized in that, described second test channel also comprises secondary signal generator, and described secondary signal generator is connected with described second input end.
8., according to the arbitrary described a kind of direct fault location plate of claim 1-7, it is characterized in that, the quantity of described first test channel is at least one.
9., according to the arbitrary described a kind of direct fault location plate of claim 1-7, it is characterized in that, the quantity of described second test channel is at least one.
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| CN201520317193.3U CN204595128U (en) | 2015-05-15 | 2015-05-15 | A kind of direct fault location plate |
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| CN201520317193.3U CN204595128U (en) | 2015-05-15 | 2015-05-15 | A kind of direct fault location plate |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105975369A (en) * | 2016-05-23 | 2016-09-28 | 河北工业大学 | Automatic testing environment configuration device for vehicle-mounted network unit |
| CN106291427A (en) * | 2016-08-05 | 2017-01-04 | 合肥工业大学 | Battery management system BMS fault self-diagnosis function test platform and method of testing |
| CN106527399A (en) * | 2016-11-18 | 2017-03-22 | 武汉理工大学 | Automobile electric control system fault injection system based on single chip microcomputer |
| CN107247451A (en) * | 2017-05-19 | 2017-10-13 | 意昂神州（北京）科技有限公司 | A kind of intelligent integrated multichannel fault injection system |
| CN108362956A (en) * | 2017-11-30 | 2018-08-03 | 中国航空综合技术研究所 | Multiple-pole switch cascading failure fill adapter for the experiment of electronic product testability |
| CN114280961A (en) * | 2021-12-29 | 2022-04-05 | 湖南凌翔磁浮科技有限责任公司 | Fault injection simulation system of magnetic suspension device |
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2015
- 2015-05-15 CN CN201520317193.3U patent/CN204595128U/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105975369A (en) * | 2016-05-23 | 2016-09-28 | 河北工业大学 | Automatic testing environment configuration device for vehicle-mounted network unit |
| CN105975369B (en) * | 2016-05-23 | 2022-12-23 | 河北工业大学 | Test environment automatic configuration equipment for vehicle-mounted network unit |
| CN106291427A (en) * | 2016-08-05 | 2017-01-04 | 合肥工业大学 | Battery management system BMS fault self-diagnosis function test platform and method of testing |
| CN106527399A (en) * | 2016-11-18 | 2017-03-22 | 武汉理工大学 | Automobile electric control system fault injection system based on single chip microcomputer |
| CN106527399B (en) * | 2016-11-18 | 2019-10-25 | 武汉理工大学 | SCM Based automobile electric control system fault injection system |
| CN107247451A (en) * | 2017-05-19 | 2017-10-13 | 意昂神州（北京）科技有限公司 | A kind of intelligent integrated multichannel fault injection system |
| CN108362956A (en) * | 2017-11-30 | 2018-08-03 | 中国航空综合技术研究所 | Multiple-pole switch cascading failure fill adapter for the experiment of electronic product testability |
| CN114280961A (en) * | 2021-12-29 | 2022-04-05 | 湖南凌翔磁浮科技有限责任公司 | Fault injection simulation system of magnetic suspension device |
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Granted publication date: 20150826 Termination date: 20170515 |