CN201681085U - Device for detecting vehicle speed signals - Google Patents
Device for detecting vehicle speed signals Download PDFInfo
- Publication number
- CN201681085U CN201681085U CN201020204700XU CN201020204700U CN201681085U CN 201681085 U CN201681085 U CN 201681085U CN 201020204700X U CN201020204700X U CN 201020204700XU CN 201020204700 U CN201020204700 U CN 201020204700U CN 201681085 U CN201681085 U CN 201681085U
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- CN
- China
- Prior art keywords
- vehicle speed
- speed signal
- comparer
- signal sensor
- parallel
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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Abstract
The utility model relates to a device for detecting vehicle signals, which is mainly characterized in that a vehicle speed signal sensor is connected in parallel with a first TVS tube and a first capacitor, the output end of the vehicle speed signal sensor is connected in series with a first resistor, the vehicle speed signal sensor is connected in parallel with a second TVS tube, and is connected with the high-level input end of a first comparator 1, the other end of the second TVS tube is connected with the low-level input end of the first comparator, the vehicle speed sensor is connected in parallel with a third TVS tube and a second capacitor, and the output end of the vehicle speed signal sensor is connected in series with a second resistor. Compared with the prior art, the utility model has the advantages of long service life, low cost and the like.
Description
Technical field
The utility model relates to a kind of device that detects vehicle speed signal, belongs to the automobile speed detection range.
Background technology
Electric boosting steering system (EPS) is an advanced person's a steering, compares with steering in the past, and EPS has different failure modes, and all will will have a kind of fault diagnosis model to EPS.And concerning EPS, vehicle speed signal is a signal of interest.But, signal with a vehicle speed sensor often is difficult to judge whether this signal occurs unusually, so the EPS of some vehicle has adopted two vehicle speed sensor, both differences judge that whether unusually it by it, this has obviously increased the complicacy of system, and improve cost.
Summary of the invention
The purpose of this utility model is to address the above problem, and a kind of low cost and vehicle speed signal diagnostic device conveniently are provided, and is achieved through the following technical solutions:
A kind of device that detects vehicle speed signal, the vehicle speed signal sensor is in parallel with TVS pipe 1 and electric capacity 1, and its output terminal is connected with resistance 1; TVS of vehicle speed signal sensor manages 2 parallel connections, and links to each other with the input end of comparer 1 high level, and the other end of TVS pipe 2 is connected with the low level input end of comparer 1; The vehicle speed signal sensor is in parallel with TVS pipe 3 and electric capacity 2, and its output terminal is connected with resistance 2; TVS of vehicle speed signal sensor manages 4 parallel connections, and links to each other with the input end of comparer 2 high level, and the other end of TVS pipe 4 is connected with the low level input end of comparer 2; Comparer 1 is connected to one and door with the output terminal of comparer 2, is connected with signal lamp with the output terminal of door.
The utility model is the advantage of prior art relatively:
1, judges abnormal signal by a vehicle speed sensor detection vehicle speed signal and an engine rotational speed signal.
2, detected device vehicle speed signal and engine rotational speed signal after, can reflect the duty of sensor immediately.
3, use comparer can prolong the life-span of electronic component, and reduce cost.
Description of drawings
Fig. 1 is the device synoptic diagram of measurement vehicle speed signal described in the utility model.
Embodiment
Below in conjunction with the embodiment accompanying drawing this device is described further.
As shown in Figure 1, vehicle speed signal and engine rotational speed signal are connected to above the signal lamp with door by one after handling by filtering circuit and shaping respectively, and comparer 1 and 2 input can bear-0.25V～+ 0.25V voltage.The principle of work of comparer as shown in Figure 2, the positive and negative terminal voltage ratio after, the voltage of its output terminal and the signal of input ratio, have after the effect, can effectively protect electronic component.When two sensors all during operate as normal, two comparers are exported high level simultaneously, by with door, can make signal lamp bright, the expression system is normal.During arbitrary road sensor failure, signal lamp goes out, and expression has fault.
The utility model mainly provides a kind of new diagnostic method, under the situation that does not deviate from the utility model essence, can change hysteresis voltage, but these corresponding changes all should belong within the affiliated claim protection domain of the utility model.
Claims (1)
1. device that detects vehicle speed signal is characterized in that: the vehicle speed signal sensor is in parallel with TVS pipe 1 and electric capacity 1, and its output terminal is connected with resistance 1; TVS of vehicle speed signal sensor manages 2 parallel connections, and links to each other with the input end of comparer 1 high level, and the other end of TVS pipe 2 is connected with the low level input end of comparer 1; The vehicle speed signal sensor is in parallel with TVS pipe 3 and electric capacity 2, and its output terminal is connected with resistance 2; TVS of vehicle speed signal sensor manages 4 parallel connections, and links to each other with the input end of comparer 2 high level, and the other end of TVS pipe 4 is connected with the low level input end of comparer 2; Comparer 1 is connected to one and door with the output terminal of comparer 2, is connected with signal lamp with the output terminal of door.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201020204700XU CN201681085U (en) | 2010-05-27 | 2010-05-27 | Device for detecting vehicle speed signals |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201020204700XU CN201681085U (en) | 2010-05-27 | 2010-05-27 | Device for detecting vehicle speed signals |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201681085U true CN201681085U (en) | 2010-12-22 |
Family
ID=43346125
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201020204700XU Expired - Fee Related CN201681085U (en) | 2010-05-27 | 2010-05-27 | Device for detecting vehicle speed signals |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201681085U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103010291A (en) * | 2011-09-27 | 2013-04-03 | 比亚迪股份有限公司 | Vehicle speed signal collection device and electric power steering system |
-
2010
- 2010-05-27 CN CN201020204700XU patent/CN201681085U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103010291A (en) * | 2011-09-27 | 2013-04-03 | 比亚迪股份有限公司 | Vehicle speed signal collection device and electric power steering system |
| CN103010291B (en) * | 2011-09-27 | 2015-11-25 | 比亚迪股份有限公司 | Vehicle speed signal harvester and electric boosting steering system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20101222 Termination date: 20110527 |