CN205374644U - Diagnostic tool is restrainted to sensor and whole fare - Google Patents
Diagnostic tool is restrainted to sensor and whole fare Download PDFInfo
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- CN205374644U CN205374644U CN201520895285.XU CN201520895285U CN205374644U CN 205374644 U CN205374644 U CN 205374644U CN 201520895285 U CN201520895285 U CN 201520895285U CN 205374644 U CN205374644 U CN 205374644U
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Abstract
The utility model relates to a diagnostic tool is restrainted to sensor and whole fare belongs to mechanical breakdown diagnosis technical field. The utility model discloses a signal detection module and signal simulation module can be respectively to fault sensor and rather than the whole fare shu jinhang diagnosis that links to each other. Signal detection module includes detection zone select switch and at least one sensor input, the signal simulation module includes signal simulation district select switch and at least one analog signal output end. After fault sensor or whole fare bundle signal were gathered to failure diagnosis's in -process, diagnostic tool, the signal message was handled through inside signal processing unit, AD translation unit, and finally the judgement accurate, rapid to the source of failure can be realized to corresponding liquid level or the temperature value of demonstration on the screen of diagnostic tool, avoids the loaded down with trivial details operation of using the universal meter to investigate step by step. The utility model discloses failure diagnosis is efficient, and this instrument easy operation is swift.
Description
Technical field
This utility model relates to sensor and overall wire sheaves diagnostic tool, belongs to technology for mechanical fault diagnosis field.
Background technology
At present, the car load meeting state IV and more maximum discharge standard all has the function of mechanical fault diagnosis, once system operation irregularity can quote relevant fault automatically.When sensor or overall wire sheaves break down, maintainer can pass through car load instrumental panel or diagnostic tool reads dependent failure title, such as short circuit sensor, open circuit etc..But existing technical scheme can only substantially confirm the direction of fault, it is impossible to identify the particular location of fault.In order to fix a breakdown, maintainer needs to utilize circuit tester that overall wire sheaves or sensor are investigated the particular location with clear failure, and process is cumbersome, and requires higher to operator's technical merit.Specifically, existing technical scheme shortcoming has two: (1) can only substantially confirm the direction of fault, not can recognise that fault particular location, such as diagnostic tool reads row's temperature sensing short circuit or open circuit fault, can only illustrate that the circuit that exhaust temperature sensor is relevant goes wrong, specifically exhaust temperature sensor faults itself, or sensor and overall wire sheaves connector fault, or be overall wire sheaves fault, diagnostic tool None-identified；(2) because of available without relevant Transducer fault detection equipment at present, for fixing a breakdown, sensor is carried out simple resistance, voltage measurement only with circuit tester by maintainer, additionally, because kind of sensor, parameter are different, when each sensor is carried out fault detect, needs constantly adjust circuit tester, and process is cumbersome, and require higher to operator's technical merit.
Utility model content
The purpose of this utility model is in that the drawbacks described above overcoming existing diagnostic tool to exist, it is proposed that a kind of sensor and overall wire sheaves diagnostic tool, uses this instrument diagnosing malfunction to sensor or car load sensor class, simple to operate, quick.
This utility model is to adopt following technical scheme to realize: a kind of sensor and overall wire sheaves diagnostic tool, including signal detection module and the big module of signal imitation module two, signal detection module includes signal detection district and selects switch and at least one sensor input, and sensor input selects switch to be connected with sensor by signal detection district；Signal imitation module includes signal imitation district and selects switch and at least one analog signal output, and analog signal output selects switch to be connected with overall wire sheaves by signal imitation district.Diagnostic apparatus and sensor or after being connected with overall wire sheaves, process the signal message collected through internal signal processing unit, A/D converting unit, finally show temperature or the level value of correspondence on the screen of diagnostic apparatus.
Further, sensor input includes environment temperature sensor input, exhaust gas temperature sensor input, urea temperature sensor input and urea liquid level sensor input.
Further, analog signal output includes environment temperature simulation signal output part, delivery temperature analog signal output, urea temperature analog signal output and urea level analog signal output.
Further, each sensor input has the analog signal output of correspondence to be attached thereto.
Further, signal detection module by with signal imitation module with the use of, it is achieved the self-checking function of diagnostic apparatus.When using this detection instrument to carry out fault diagnosis, it is necessary to substep carries out, detect whether sensor exists fault first with detection module, it is determined that after sensor fault-free, utilize whether signal imitation module detection overall wire sheaves exists fault.
Principle of the present utility model is: (1) diagnostic apparatus has self-checking function, it is to avoid in diagnosis process, the problem such as instrument itself or himself wire harness causes the erroneous judgement to the source of failure；(2) by selecting disparate modules unit to realize the detection to the fault of sensor own and coupled overall wire sheaves, the accuracy of fault detect is improved.Signal measured by sensor can be carried out numerical monitor by this utility model detection equipment.
The beneficial effects of the utility model are:
(1) this utility model instrument has self-checking function, it is to avoid the wrong diagnosis that in diagnosis process, the fault of instrument own causes；
(2) for the most common failure of sensor or overall wire sheaves, respectively sensor or the overall wire sheaves that is connected with sensor can be diagnosed by the signal detection module of diagnostic device, signal imitation module, it is to avoid the troublesome operation that maintainer is investigated step by step.
Accompanying drawing explanation
Fig. 1 is internal wiring of the present utility model.
Fig. 2 is external structure of the present utility model.
Fig. 3 is rat tail of the present utility model.
Fig. 4 is operating process of the present utility model.
Detailed description of the invention
Below in conjunction with accompanying drawing, the utility model is described in further detail.
As shown in Figure 1, sensor described in the utility model and overall wire sheaves diagnostic tool internal wiring, signal imitation module includes signal imitation district and selects switch, environment temperature simulation signal output part, delivery temperature analog signal output, urea temperature analog signal output and urea level analog signal output, environment temperature simulation signal output part, delivery temperature analog signal output, urea temperature analog signal output and urea level analog signal output to select switch to be connected with overall wire sheaves respectively through signal imitation district.
As shown in Figure 1, 2, 3, for the fault that sensor and overall wire sheaves often occur, this equipment devises two modules, i.e. signal imitation module and signal detection module for sensor diagnostic tool interior structure, external structure and rat tail.Signal imitation module is mainly used in whether diagnosis overall wire sheaves exists fault, whether signal detection module exists fault for diagnostic sensor, it addition, signal detection module and signal imitation module cooperate and can realize the self-checking function of diagnostic tool, the specifically used flow process of this equipment is as shown in Figure 4.
When diagnostic tool is diagnosed to be sensor fault, use this utility model instrument carries out the basic procedure of malfunction elimination and is: first diagnostic tool is carried out self-inspection, it is prevented that the wrong diagnosis that the fault of instrument own causes；Whether sensor itself is existed fault by the fault detection module then utilizing diagnostic tool is investigated, and finally utilizes the signal imitation module of diagnostic tool that overall wire sheaves is investigated.Each step concrete operations are as follows:
Diagnostic tool self-inspection: according to fault sensor type, selects signal detection module and the corresponding gear of signal imitation module, and by both wire harness connectors to inserting, if temperature/level value that screen shows is identical with the value that signal imitation exports, then self-inspection is passed through；If differing, it is necessary to diagnostic tool is carried out failture evacuation.
Sensor fault is investigated: docked with fault sensor connector by diagnostic tool signal detection district connector, and the resistance value of sensor can be converted into temperature or the level value of correspondence by diagnostic tool, and shows at screen.If screen show value is very little of zero, sensor internal short circuit is described；If the value that screen shows is infinitely great, sensor open circuit is described；If screen show value is within normal range, sensor fault-free is described, it is necessary to overall wire sheaves is investigated.
Overall wire sheaves malfunction elimination: by connector corresponding with overall wire sheaves for diagnostic tool signal imitation module connector to inserting, for instance the gear of 20 DEG C of Environment temperature sensor, after being connected with overall wire sheaves, check whether diagnostic tool screen shows 20.If screen display reading is consistent with the gear of analogue signal module, it was shown that overall wire sheaves is normal, without short circuit, open circuit fault；Otherwise, there is fault in overall wire sheaves.
This utility model key point is in that diagnostic tool has self-checking function, it is to avoid in diagnosis process, the problem such as instrument itself or himself wire harness causes the erroneous judgement to the source of failure；Because each sensor parameters is different, by selecting switch to select kind of sensor, it is to avoid parameter mixes the trouble brought；For the most common failure of sensor and overall wire sheaves, the concrete source of failure judgement can be come by the module that diagnostic tool is different, it is to avoid utilize the troublesome operation that circuit tester is investigated step by step.
Certainly, foregoing is only preferred embodiment of the present utility model, it is impossible to be considered for limiting scope of embodiments of the present utility model.This utility model is also not limited to the example above, and those skilled in the art are made impartial change and improvement etc. in essential scope of the present utility model, all should belong in utility model covering scope of the present utility model.
Claims (4)
1. a sensor and overall wire sheaves diagnostic tool, it is characterized in that: include signal detection module and the big module of signal imitation module two, signal detection module includes signal detection district and selects switch and at least one sensor input, and sensor input selects switch to be connected with sensor by signal detection district；Signal imitation module includes signal imitation district and selects switch and at least one analog signal output, analog signal output selects switch to be connected with overall wire sheaves by signal imitation district, after diagnostic apparatus is connected with sensor or overall wire sheaves, the signal message collected is processed through internal signal processing unit, A/D converting unit, on the screen of diagnostic tool, then shows corresponding temperature or level value.
2. sensor according to claim 1 and overall wire sheaves diagnostic tool, it is characterised in that: sensor input includes environment temperature sensor input, exhaust gas temperature sensor input, urea temperature sensor input and urea liquid level sensor input.
3. sensor according to claim 1 and overall wire sheaves diagnostic tool, it is characterised in that: analog signal output includes environment temperature simulation signal output part, delivery temperature analog signal output, urea temperature analog signal output and urea level analog signal output.
4. sensor according to Claims 2 or 3 and overall wire sheaves diagnostic tool, it is characterised in that: each sensor input has the analog signal output of correspondence to be attached thereto.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520895285.XU CN205374644U (en) | 2015-11-11 | 2015-11-11 | Diagnostic tool is restrainted to sensor and whole fare |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520895285.XU CN205374644U (en) | 2015-11-11 | 2015-11-11 | Diagnostic tool is restrainted to sensor and whole fare |
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| CN205374644U true CN205374644U (en) | 2016-07-06 |
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| CN201520895285.XU Active CN205374644U (en) | 2015-11-11 | 2015-11-11 | Diagnostic tool is restrainted to sensor and whole fare |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107764478A (en) * | 2017-09-08 | 2018-03-06 | 中国第汽车股份有限公司 | Portable direct-reading type Motronic control maps engine oil pressure pickup detector |
| CN113340460A (en) * | 2021-06-09 | 2021-09-03 | 中国第一汽车股份有限公司 | Temperature testing system and method |
| CN115075926A (en) * | 2022-05-11 | 2022-09-20 | 潍柴动力股份有限公司 | Aftertreatment fault detection device and method and diesel engine |
-
2015
- 2015-11-11 CN CN201520895285.XU patent/CN205374644U/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107764478A (en) * | 2017-09-08 | 2018-03-06 | 中国第汽车股份有限公司 | Portable direct-reading type Motronic control maps engine oil pressure pickup detector |
| CN113340460A (en) * | 2021-06-09 | 2021-09-03 | 中国第一汽车股份有限公司 | Temperature testing system and method |
| CN113340460B (en) * | 2021-06-09 | 2024-03-15 | 中国第一汽车股份有限公司 | Temperature testing system and method |
| CN115075926A (en) * | 2022-05-11 | 2022-09-20 | 潍柴动力股份有限公司 | Aftertreatment fault detection device and method and diesel engine |
| CN115075926B (en) * | 2022-05-11 | 2024-03-19 | 潍柴动力股份有限公司 | Post-processing fault detection device and method and diesel engine |
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