CN204142271U - A kind of sensor malfunction diagnostic device - Google Patents
A kind of sensor malfunction diagnostic device Download PDFInfo
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- CN204142271U CN204142271U CN201420466058.0U CN201420466058U CN204142271U CN 204142271 U CN204142271 U CN 204142271U CN 201420466058 U CN201420466058 U CN 201420466058U CN 204142271 U CN204142271 U CN 204142271U
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- current detector
- stationary contact
- diagnostic device
- current
- wiring hole
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Abstract
The utility model relates to SCR system diagnostic device technical field, a kind of sensor malfunction diagnostic device is provided, sensor malfunction diagnostic device has housing, housing interior structure and three diagnosis joint compositions of drawing from shell structure, housing is provided with front panel and wiring hole, front panel is provided with display screen, key zone and selector switch, enclosure interior is provided with control circuit board, control circuit board is provided with governor circuit, governor circuit is provided with power supply, multi-position switch, first current detector, second current detector, 3rd current detector and the 4th current detector, first current detector, second current detector, connecting line and the extreme connecting line of power-of the 3rd current detector and the 4th current detector form wire harness, pass wiring hole and be connected respectively diagnosis joint, realize the measurement to sensor resistance, can contrast with normal value resistance easily, judge whether this sensor damages, simple to operate, fast.
Description
Technical field
The utility model belongs to SCR system diagnostic device technical field, particularly relates to a kind of sensor malfunction diagnostic device.
Background technology
Abgasgesetz is upgraded to state IV from state III, the NO of diesel engine
xemission control is the focus studied in technology application process, and wherein, SCR (Selective Catalytic Reduction) technology is one of main aftertreatment technologies eliminating oxides of nitrogen in diesel exhaust gas, is current NO
xthe hot spot technology of emission control.Its principle of work is: aftertreatment control unit calculates current urea requirement amount according to the operating condition of engine, and control actuator and spray urea liquid in SCR catalyst, urea liquid at high temperature resolves into NH
3and CO
2.
In order to ensure that SCR system normally works; need to increase the sensors such as exhaust temperature sensor, environment temperature sensing, urea box liquid level temperature; state IV car load all has OBD function; once system works can quote dependent failure extremely automatically; car load instrument or diagnostic equipment can read relevant diagnostic trouble code and fault title, but substantially can only confirm the direction of fault.If failure cause will be confirmed further, need technician to use multimeter, according to sensor characteristic and with the electrical parameter of car load Data Matching, circuit on-off, sensor resistance etc. are measured.
But because between sensor plug connector and metal terminal thereof, space is very little, make circuit connect inconvenience, above-mentioned surveying work is bad to carry out, and malfunction elimination process is very loaded down with trivial details.
Utility model content
The purpose of this utility model is to provide a kind of sensor malfunction diagnostic device, to be intended to solve in prior art when system malfunctions, can only to confirm the general direction of fault, the problem that the measurement of fault exact cause is very loaded down with trivial details.
The utility model realizes like this, a kind of sensor malfunction diagnostic device, described sensor malfunction diagnostic device is provided with housing, described housing is provided with front panel and is positioned at the wiring hole of described housing tip, described front panel is provided with display screen, key zone and selector switch, be provided with control circuit board in described housing, the wire harness that described control circuit board is drawn connects several diagnosis joints through described wiring hole;
Described control circuit board is provided with governor circuit, wherein:
Described governor circuit is provided with power supply, the positive terminal of described power supply connects the moving contact end of multi-position switch, described multi-position switch is provided with the first stationary contact, second stationary contact, 3rd stationary contact and the 4th stationary contact, described first stationary contact connects the first current detector, described second stationary contact connects the second current detector, described 3rd stationary contact connects the 3rd current detector, described 4th stationary contact connects the 4th current detector, described first current detector, second current detector, 3rd current detector, 4th current detector and the extreme connecting line of described power-form wire harness in the lump and cause described wiring hole,
The connecting line of described first current detector, the second current detector, the 3rd current detector, the 4th current detector connects with the positive terminal of corresponding diagnosis joint respectively after described wire harness guides, and the extreme connecting line of described power-is connected with the negative pole of each diagnosis joint after the guiding of described wire harness;
Between described first current detector and the first stationary contact, between described second current detector and described second stationary contact, the first current node is provided with between described 3rd current detector and described 3rd stationary contact and between described 4th current detector and described 4th stationary contact, second current node, 3rd current node and the 4th current node, described first current node, second current node, 3rd current node and the 4th current node connect microprocessor respectively, the other end of described microprocessor connects described power cathode, described microprocessor respectively with the described display screen of described front panel, key zone and selector switch electrical connection.
As a kind of improved plan, between described first current detector and described wiring hole, be connected with the first protective resistance.
As a kind of improved plan, between described second current detector and described wiring hole, be connected with the second protective resistance.
As a kind of improved plan, between described 3rd current detector and described wiring hole, be connected with the 3rd protective resistance.
As a kind of improved plan, between described 4th current detector and described wiring hole, be connected with the 4th protective resistance.
As a kind of improved plan, described display screen comprises the first viewing area and the second viewing area.
Because sensor malfunction diagnostic device has housing, housing interior structure and three diagnosis joint compositions of drawing from shell structure, housing is provided with front panel and wiring hole, front panel is provided with display screen, key zone and selector switch, enclosure interior is provided with control circuit board, control circuit board is provided with governor circuit, described governor circuit is provided with power supply, multi-position switch, first current detector, second current detector, 3rd current detector and the 4th current detector, first current detector, second current detector, connecting line and the extreme connecting line of power-of the 3rd current detector and the 4th current detector form wire harness, pass described wiring hole and be connected respectively described diagnosis joint, thus measure the resistance value of room temperature lower sensor, can contrast with normal value resistance easily, confirm that whether this resistance is correct, can judge whether this sensor damages, this sensor malfunction diagnostic device is diagnosed sensor fault, simple to operate, fast, avoid the simple use multimeter of technician to circuit on-off, when resistance value is measured, because circuit connects the inconvenient miscellaneous work brought.
Due in governor circuit, be provided with the first protective resistance, the second protective resistance, the 3rd protective resistance and the 4th protective resistance respectively, realize the protection to governor circuit.
Because display screen comprises the first viewing area and the second viewing area, the wherein resistance value of the sensor of the first viewing area display measurement, and the second viewing area is the normal resistance values of current the surveyed sensor inputted by the key zone of front panel, when carrying out measurement operation, both are contrast mutually, and result of determination comparatively obviously facilitates.
Accompanying drawing explanation
Fig. 1 is the appearance schematic diagram of the sensor malfunction diagnostic device that the utility model provides;
Fig. 2 is the shell structure schematic diagram of the sensor malfunction diagnostic device that the utility model provides;
Fig. 3 is the circuit diagram of the governor circuit that the utility model provides;
Wherein, 1-housing, 11-front panel, 111-display screen, 1111-first viewing area, 1112-second viewing area, 112-key zone, 113-selector switch, 12-wiring hole, 13-power supply, 14-multi-position switch, 141-moving contact end, 142-first stationary contact, 143-second stationary contact, 144-the 3rd stationary contact, 145-the 4th stationary contact, 15-first current detector, 16-second current detector, 17-the 3rd current detector, 18-the 4th current detector, 19-first current node, 20-second current node, 21-the 3rd current node, 22-the 4th current node, 23-microprocessor, 24-first protective resistance, 25-second protective resistance, 26-the 3rd protective resistance, 27-the 4th protective resistance, 2-wire harness, 3-diagnoses joint, 4-encapsulating structure.
Embodiment
In order to make the purpose of this utility model, technical scheme and advantage clearly understand, below in conjunction with drawings and Examples, the utility model is further elaborated.Should be appreciated that specific embodiment described herein only in order to explain the utility model, and be not used in restriction the utility model.
Fig. 1 shows the appearance schematic diagram of the sensor malfunction diagnostic device that the utility model provides, and for convenience of explanation, only gives the part relevant to the utility model in figure.
Shown in composition graphs 2, sensor malfunction diagnostic device is provided with housing 1, described housing 1 is provided with front panel 11 and is positioned at the wiring hole 12 on described housing 1 top, described front panel 11 is provided with display screen 111, key zone 112 and selector switch 113, be provided with control circuit board in described housing 1, the wire harness 2 that described control circuit board is drawn connects several diagnosis joints 3 through described wiring hole 12;
Described control circuit board is provided with governor circuit, wherein:
As shown in Figure 3, described governor circuit is provided with power supply 13, the positive terminal of described power supply 13 connects the moving contact end 141 of multi-position switch 14, described multi-position switch 14 is provided with the first stationary contact 142, second stationary contact 143, 3rd stationary contact 144 and the 4th stationary contact 145, described first stationary contact 142 connects the first current detector 15, described second stationary contact 143 connects the second current detector 16, described 3rd stationary contact 144 connects the 3rd current detector 17, described 4th stationary contact 145 connects the 4th current detector 18, described first current detector 15, second current detector 16, 3rd current detector 17, the connecting line of the 4th current detector 18 and described power supply 13 negative pole end forms wire harness 2 in the lump and causes described wiring hole 12,
The connecting line of described first current detector 15, second current detector 16, the 3rd current detector 17, the 4th current detector 18 connects with the positive terminal of corresponding diagnosis joint 3 respectively after described wire harness 2 guides, and the connecting line of described power supply 13 negative pole end is connected with the negative pole of each diagnosis joint 3 after the guiding of described wire harness 2;
Between described first current detector 15 and the first stationary contact 142, between described second current detector 16 and described second stationary contact 143, the first current node 19 is provided with between described 3rd current detector 17 and described 3rd stationary contact 144 and between described 4th current detector 18 and described 4th stationary contact 145, second current node 20, 3rd current node 21 and the 4th current node 22, described first current node 19, second current node 20, 3rd current node 21 and the 4th current node 22 connect microprocessor 23 respectively, the other end of described microprocessor 23 connects described power supply 13 negative pole, described microprocessor 23 respectively with the described display screen 111 of described front panel 11, key zone 112 and selector switch 113 are electrically connected.
In the utility model; the first protective resistance 24 is connected with between described first current detector 15 and described wiring hole; the second protective resistance 25 is connected with between described second current detector 16 and described wiring hole; the 3rd protective resistance 26 is connected with between described 3rd current detector 17 and described wiring hole; the 4th protective resistance 27 is connected with between described 4th current detector 18 and described wiring hole; these protective resistances are protected governor circuit, do not repeat them here.
In the utility model, display screen 111 comprises the first viewing area 1111 and the second viewing area 1112, wherein, the resistance value of the sensor of the first viewing area 1111 display measurement, and the second viewing area 1112 is the normal resistance values of current the surveyed sensor inputted by the key zone 112 of front panel 11, when carrying out measurement operation, both contrast mutually, and result of determination comparatively obviously facilitates.
In this embodiment, need to realize inputting normal resistance parameter that is to be measured or each sensor by microprocessor 23 by key zone 112, be stored in microprocessor 23, when selector switch 113 is reached certain gear, then read the parameter corresponding to sensor to be measured of current correspondence, be presented at the second viewing area 1112, to compare with the numerical value measured, convenient and swift.
In the utility model, wire harness between described wiring hole and described diagnosis joint 3 is provided with encapsulating structure 4, described diagnosis joint 3 is drawn from described encapsulating structure 4, wherein, described encapsulating structure 4 is provided with several plug interface (not shown)s, diagnoses joint 3 described in the grafting of described plug interface.
In the present embodiment, the extraction that encapsulating structure 4 can realize the constraint of wire harness and each diagnosis joint 3 is set, make whole sensor malfunction diagnostic device structure simple, be convenient to deposit and safeguard, and pulling/inserting structure is set on encapsulating structure 4, make the operability of diagnosis joint 3 stronger, and be convenient to depositing and safeguarding of device, simultaneously, also can expand the measurement function of this device, such as the diagnosis of intake air temperature sensor, engine water temperature sensor, does not repeat them here, but not in order to limit the utility model.
In the utility model, each diagnosis joint 3 can combinationally use, a plug connector only drawn by such as urea level temperature sensor, this plug connector has four terminals, 2 terminals are wherein corresponding with urea liquid level sensor, remain two terminals corresponding with urea temperature sensor, certainly also may there are other situations, do not repeat them here, but not in order to limit the utility model.
In the utility model, when sensor dependent failure quoted by car load, by pre-designed diagnosis joint and corresponding sensor to inserting, measure the resistance value of room temperature lower sensor, can contrast with normal value resistance easily, confirm that whether this resistance is correct, can judge whether this sensor damages, this device is used to diagnose sensor fault, simple to operate, quick, avoid technician's simple use multimeter when circuit on-off, resistance value are measured, due to circuit connect that inconvenience brings miscellaneous work.
For the ease of understanding, followingly provide its concrete implementation procedure:
(1) selector switch 113 of front panel 11 is arranged on for selecting the type of corresponding sensor to be measured, need before measuring to carry out type selecting in this selector switch 113, such as exhaust gas temperature sensor, environment temperature sensor, liquid level sensor of urea box and urea box temperature sensor etc.;
(2) when after type selecting, the normal resistance parameter display of the sensor that microcomputer reads is corresponding is in the second viewing area of display screen;
(3) will joint be diagnosed being inserted on the corresponding interface of sensor, governor circuit completes the measurement to sensor resistance, and is presented at the first viewing area, carries out checking comparison for survey crew.
The foregoing is only preferred embodiment of the present utility model; not in order to limit the utility model; all do within spirit of the present utility model and principle any amendment, equivalent to replace and improvement etc., all should be included within protection domain of the present utility model.
Claims (6)
1. a sensor malfunction diagnostic device, it is characterized in that, described sensor malfunction diagnostic device is provided with housing (1), described housing (1) is provided with front panel (11) and is positioned at the wiring hole (12) on described housing (1) top, described front panel (11) is provided with display screen (111), key zone (112) and selector switch (113), described housing is provided with control circuit board in (1), and the wire harness (2) that described control circuit board is drawn connects several diagnosis joint (3) through described wiring hole (12);
Described control circuit board is provided with governor circuit, wherein:
Described governor circuit is provided with power supply (13), the positive terminal of described power supply (13) connects the moving contact end (141) of multi-position switch (14), described multi-position switch (14) is provided with the first stationary contact (142), second stationary contact (143), 3rd stationary contact (144) and the 4th stationary contact (145), described first stationary contact (142) connects the first current detector (15), described second stationary contact (143) connects the second current detector (16), described 3rd stationary contact (144) connects the 3rd current detector (17), described 4th stationary contact (145) connects the 4th current detector (18), described first current detector (15), second current detector (16), 3rd current detector (17), the connecting line of the 4th current detector (18) and described power supply (13) negative pole end forms wire harness (2) in the lump and causes described wiring hole (12),
The connecting line of described first current detector (15), the second current detector (16), the 3rd current detector (17), the 4th current detector (18) connects with the positive terminal of corresponding diagnosis joint (3) respectively after described wire harness (2) guides, and the connecting line of described power supply (13) negative pole end is connected with the negative pole of each diagnosis joint (3) after the guiding of described wire harness (2);
Between described first current detector (15) and the first stationary contact (142), between described second current detector (16) and described second stationary contact (143), the first current node (19) is provided with between described 3rd current detector (17) and described 3rd stationary contact (144) and between described 4th current detector (18) and described 4th stationary contact (145), second current node (20), 3rd current node (21) and the 4th current node (22), described first current node (19), second current node (20), 3rd current node (21) and the 4th current node (22) connect microprocessor (23) respectively, the other end of described microprocessor (23) connects described power supply (13) negative pole, described microprocessor (23) respectively with the described display screen (111) of described front panel (11), key zone (112) and selector switch (113) electrical connection.
2. sensor malfunction diagnostic device according to claim 1, is characterized in that, is connected with the first protective resistance (24) between described first current detector (15) and described wiring hole (12).
3. sensor malfunction diagnostic device according to claim 1, is characterized in that, is connected with the second protective resistance (25) between described second current detector (16) and described wiring hole (12).
4. sensor malfunction diagnostic device according to claim 1, is characterized in that, is connected with the 3rd protective resistance (26) between described 3rd current detector (17) and described wiring hole (12).
5. sensor malfunction diagnostic device according to claim 1, is characterized in that, is connected with the 4th protective resistance (27) between described 4th current detector (18) and described wiring hole (12).
6. sensor malfunction diagnostic device according to claim 1, is characterized in that, described display screen (111) comprises the first viewing area (1111) and the second viewing area (1112).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420466058.0U CN204142271U (en) | 2014-08-16 | 2014-08-16 | A kind of sensor malfunction diagnostic device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420466058.0U CN204142271U (en) | 2014-08-16 | 2014-08-16 | A kind of sensor malfunction diagnostic device |
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| Publication Number | Publication Date |
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| CN204142271U true CN204142271U (en) | 2015-02-04 |
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|---|---|---|---|
| CN201420466058.0U Active CN204142271U (en) | 2014-08-16 | 2014-08-16 | A kind of sensor malfunction diagnostic device |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107515024A (en) * | 2017-09-15 | 2017-12-26 | 中铁工程装备集团盾构制造有限公司 | Shield machine sensor function measurement apparatus and its method |
| CN107677311A (en) * | 2017-09-25 | 2018-02-09 | 无锡沃尔福汽车技术有限公司 | A kind of nitrogen oxide sensor detection means |
| 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 |
| CN108020395A (en) * | 2017-12-29 | 2018-05-11 | 北京航天测控技术有限公司 | A kind of sensor signal diagnostic device and system suitable for wind-tunnel health control |
| CN109724207A (en) * | 2018-12-04 | 2019-05-07 | 青岛海尔空调器有限总公司 | Air conditioner and its control method |
| CN111188650A (en) * | 2019-11-28 | 2020-05-22 | 天地（常州）自动化股份有限公司 | Sensor fault identification method, indication method and coal mine safety monitoring system |
| CN111543861A (en) * | 2020-05-07 | 2020-08-18 | 珠海格力电器股份有限公司 | Method and device for determining fault of color screen cooking equipment and color screen cooking equipment |
-
2014
- 2014-08-16 CN CN201420466058.0U patent/CN204142271U/en active Active
Cited By (9)
| 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 |
| CN107515024A (en) * | 2017-09-15 | 2017-12-26 | 中铁工程装备集团盾构制造有限公司 | Shield machine sensor function measurement apparatus and its method |
| CN107677311A (en) * | 2017-09-25 | 2018-02-09 | 无锡沃尔福汽车技术有限公司 | A kind of nitrogen oxide sensor detection means |
| CN108020395A (en) * | 2017-12-29 | 2018-05-11 | 北京航天测控技术有限公司 | A kind of sensor signal diagnostic device and system suitable for wind-tunnel health control |
| CN109724207A (en) * | 2018-12-04 | 2019-05-07 | 青岛海尔空调器有限总公司 | Air conditioner and its control method |
| CN109724207B (en) * | 2018-12-04 | 2020-04-24 | 青岛海尔空调器有限总公司 | Air conditioner and control method thereof |
| CN111188650A (en) * | 2019-11-28 | 2020-05-22 | 天地（常州）自动化股份有限公司 | Sensor fault identification method, indication method and coal mine safety monitoring system |
| CN111543861A (en) * | 2020-05-07 | 2020-08-18 | 珠海格力电器股份有限公司 | Method and device for determining fault of color screen cooking equipment and color screen cooking equipment |
| CN111543861B (en) * | 2020-05-07 | 2021-07-06 | 珠海格力电器股份有限公司 | Method and device for determining fault of color screen cooking equipment and color screen cooking equipment |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20161011 Address after: 261061 Shandong city of Weifang province high tech Zone Weihe Road No. 169 Patentee after: Weichai Power Air Purification Technology Co. Ltd. Address before: 261205 Shandong city in Weifang province Fu hi tech Industrial Development Zone, East Street No. 197 Patentee before: Weichai Dynamic Co., Ltd. |
|
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20180904 Address after: 261061 No. 197, Fu Shou street, hi tech Industrial Development Zone, Weifang, Shandong. Co-patentee after: Weichai Power Air Purification Technology Co. Ltd. Patentee after: Weichai Dynamic Co., Ltd. Address before: 261061 No. 169 Weifang Road, hi tech Zone, Weifang, Shandong Patentee before: Weichai Power Air Purification Technology Co. Ltd. |