CN203344866U - Vehicle speed signal conversion circuit - Google Patents
Vehicle speed signal conversion circuit Download PDFInfo
- Publication number
- CN203344866U CN203344866U CN 201320328242 CN201320328242U CN203344866U CN 203344866 U CN203344866 U CN 203344866U CN 201320328242 CN201320328242 CN 201320328242 CN 201320328242 U CN201320328242 U CN 201320328242U CN 203344866 U CN203344866 U CN 203344866U
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- Prior art keywords
- resistance
- vehicle speed
- speed signal
- comparator
- resistor
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- Expired - Lifetime
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- 238000006243 chemical reaction Methods 0.000 title abstract description 6
- 230000000295 complement effect Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
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Abstract
The utility model discloses a vehicle speed signal conversion circuit. The vehicle speed signal conversion circuit is characterized in that a resistor R1 is connected with a resistor R2, the other terminal of the resistor R2 is connected with a VCC, and the other terminal of the resistor R1 is connected to the ground; the resistor R1 and the resistor R2 are simultaneously connected with the inverted phase input terminal of a comparator U1, one terminal of a resistor R5 is connected with the positive phase input terminal of the comparator U1, the other terminal of the resistor R5 is connected with the VCC, the anode of a diode D1 is also connected to the positive phase input terminal of the comparator U1, the cathode of the diode D1 is connected with a resistor R3, the other terminal of the resistor R3 is connected to the ground, one terminal of a R4 is connected with the output terminal of the comparator, and the other terminal of the R4 is connected with the VCC. By the adoption of the circuit structure, the vehicle speed signal conversion circuit has the advantages that vehicle speed signals are processed to be matched with other control modules on a vehicle; stability of the vehicle speed signals is guaranteed; the vehicle speed signal conversion circuit is simple in structure, easy to obtain, and low in production cost.
Description
Technical field
The utility model relates to the signals of vehicles converting system, particularly a kind of vehicle speed signal change-over circuit.
Background technology
In the former unmatched problem of some control modules so existed on vehicle speed signal amplitude and automobile of signals of vehicles conversion process, cause these control modules can't directly obtain vehicle speed signal.
At present, most of auto vendors adopt is that the mode of electric resistance partial pressure is processed vehicle speed signal.And the mode of this electric resistance partial pressure is unsatisfactory for the isolation effect of signal noise, resistor voltage divider circuit comprises the components and parts such as divider resistance, RC filter circuit, stabilivolt, expensive.
For above-mentioned problem, a kind of novel vehicle speed signal change-over circuit is provided, vehicle speed signal is processed, with reach with car on the purpose that is complementary of other control module.
The utility model content
Technical problem to be solved in the utility model is, a kind of vehicle speed signal change-over circuit is provided, vehicle speed signal is processed, with reach with car on the purpose that is complementary of other control module.
For achieving the above object, the technical solution of the utility model is that a kind of vehicle speed signal change-over circuit is characterized in that: described change-over circuit is that resistance R 1 is connected with resistance R 2, another termination VCC of resistance R 2, the other end ground connection of resistance R 1; Resistance R 1 and resistance R 2 connect the inverting input of comparator U1 simultaneously, the normal phase input end of one termination comparator U1 of resistance R 5, another termination VCC, the anode of diode D1 also is connected to the normal phase input end of comparator U1, the negative electrode connecting resistance R3 of diode D1, the other end ground connection of resistance R 3, the mouth of the termination comparator of R4, another termination VCC of R4.
In described change-over circuit, vehicle speed signal accesses between resistance R 3 and diode D1.
A kind of vehicle speed signal change-over circuit, owing to adopting above-mentioned circuit structure, the utility model has the advantage of: 1, vehicle speed signal is processed, other control module on itself and car is complementary; 2, guarantee the stability of vehicle speed signal; 3, simple in structure being easy to realized, productive costs is lower.
The accompanying drawing explanation
Below in conjunction with the drawings and specific embodiments, the utility model is described in further detail;
The circuit diagram that Fig. 1 is a kind of vehicle speed signal change-over circuit of the utility model.
The specific embodiment
As shown in Figure 1, the utility model comprises comparator U1, resistance R 1, R2, R3, R4, R5 and diode D1.Concrete, resistance R 1 is connected with resistance R 2, another termination VCC(comparator operating voltage of resistance R 2), the other end ground connection of resistance R 1.Resistance R 1 and resistance R 2 connect the inverting input of comparator U1 simultaneously.The normal phase input end of one termination comparator U1 of resistance R 5, another termination VCC of resistance R 5, the anode of diode D1 also is connected to the normal phase input end of comparator U1, the negative electrode connecting resistance R3 of diode D1, the other end ground connection of resistance R 3.The mouth of one termination comparator U1 of resistance R 4, another termination VCC of resistance R 4.
Between vehicle speed signal access resistance R 3 and diode D1, when it is high level (being generally 9-12V), this level is generally 3V or 5V higher than VCC(), diode D1 manages cut-off, resistance R 3 is grounding resistance, VCC is by the positive terminal of resistance R 5 access comparator U1, in diode D1 pipe, no current flows through, the inverting input of comparator U1 is by the dividing potential drop of resistance R 1 and resistance R 2, obtain a level value: VCC*R1/(R1+R2), so the positive terminal level VCC of comparator U1 is higher than the level of end of oppisite phase, comparator U1 is output as high level VCC, comparator U1 is for opening Lou output, need connecting resistance R4 pull-up resistor, when vehicle speed signal is low level, be generally below 1V, this level is lower than VCC, D1 manages conducting, the normal phase input end level of comparator U1 is VIN+Vd, and the conduction voltage drop that Vd is diode D1, by the resistance of regulating resistance R1 and resistance R 2, guarantee that the inverting input level of comparator U1 is higher than VIN+Vd, now comparator U1 is output as low level.
By this technical scheme, by input amplitude higher vehicle speed pulse signal, convert a suitable impulse singla of the receptible amplitude of control module to, and the buffer action by comparator U1 (input impedance is very large, output impedance is very little), incoming signal is more stable.This circuit structure is simple and be easy to realize.
The above is exemplarily described the utility model by reference to the accompanying drawings; obviously the utility model specific implementation is not subject to the restrictions described above; as long as the various improvement that adopted technical solutions of the utility model to carry out; or directly apply to other occasion without improvement, all within protection domain of the present utility model.
Claims (2)
1. a vehicle speed signal change-over circuit, it is characterized in that: described change-over circuit is that resistance R 1 is connected with resistance R 2, another termination VCC of resistance R 2, the other end ground connection of resistance R 1; Resistance R 1 and resistance R 2 connect the inverting input of comparator U1 simultaneously, the normal phase input end of one termination comparator U1 of resistance R 5, another termination VCC, the anode of diode D1 also is connected to the normal phase input end of comparator U1, the negative electrode connecting resistance R3 of diode D1, the other end ground connection of resistance R 3, the mouth of the termination comparator of R4, another termination VCC of R4.
2. a kind of vehicle speed signal change-over circuit according to claim 1 is characterized in that: in described change-over circuit between vehicle speed signal access resistance R 3 and diode D1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320328242 CN203344866U (en) | 2013-06-07 | 2013-06-07 | Vehicle speed signal conversion circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320328242 CN203344866U (en) | 2013-06-07 | 2013-06-07 | Vehicle speed signal conversion circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203344866U true CN203344866U (en) | 2013-12-18 |
Family
ID=49744795
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320328242 Expired - Lifetime CN203344866U (en) | 2013-06-07 | 2013-06-07 | Vehicle speed signal conversion circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203344866U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105675904A (en) * | 2016-03-31 | 2016-06-15 | 中国重汽集团济南动力有限公司 | Vehicle speed sensor signal processing circuit |
| CN106794813A (en) * | 2016-11-17 | 2017-05-31 | 深圳市锐明技术股份有限公司 | A kind of conversion match circuit of vehicle speed pulse level |
-
2013
- 2013-06-07 CN CN 201320328242 patent/CN203344866U/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105675904A (en) * | 2016-03-31 | 2016-06-15 | 中国重汽集团济南动力有限公司 | Vehicle speed sensor signal processing circuit |
| CN106794813A (en) * | 2016-11-17 | 2017-05-31 | 深圳市锐明技术股份有限公司 | A kind of conversion match circuit of vehicle speed pulse level |
| WO2018090275A1 (en) * | 2016-11-17 | 2018-05-24 | 深圳市锐明技术股份有限公司 | Circuit for level switch and match of vehicle speed pulse signal |
| CN106794813B (en) * | 2016-11-17 | 2019-07-05 | 深圳市锐明技术股份有限公司 | A kind of conversion match circuit of vehicle speed pulse level |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20131218 |
|
| CX01 | Expiry of patent term |