CN106627364A - Brake signal input processing circuit and diagnosis method - Google Patents
Brake signal input processing circuit and diagnosis method Download PDFInfo
- Publication number
- CN106627364A CN106627364A CN201610714984.9A CN201610714984A CN106627364A CN 106627364 A CN106627364 A CN 106627364A CN 201610714984 A CN201610714984 A CN 201610714984A CN 106627364 A CN106627364 A CN 106627364A
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- China
- Prior art keywords
- brake
- signal
- switch
- signal input
- speed
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60Q—ARRANGEMENT OF SIGNALLING OR LIGHTING DEVICES, THE MOUNTING OR SUPPORTING THEREOF OR CIRCUITS THEREFOR, FOR VEHICLES IN GENERAL
- B60Q11/00—Arrangement of monitoring devices for devices provided for in groups B60Q1/00 - B60Q9/00
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60Q—ARRANGEMENT OF SIGNALLING OR LIGHTING DEVICES, THE MOUNTING OR SUPPORTING THEREOF OR CIRCUITS THEREFOR, FOR VEHICLES IN GENERAL
- B60Q1/00—Arrangement of optical signalling or lighting devices, the mounting or supporting thereof or circuits therefor
- B60Q1/26—Arrangement of optical signalling or lighting devices, the mounting or supporting thereof or circuits therefor the devices being primarily intended to indicate the vehicle, or parts thereof, or to give signals, to other traffic
- B60Q1/44—Arrangement of optical signalling or lighting devices, the mounting or supporting thereof or circuits therefor the devices being primarily intended to indicate the vehicle, or parts thereof, or to give signals, to other traffic for indicating braking action or preparation for braking, e.g. by detection of the foot approaching the brake pedal
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Valves And Accessory Devices For Braking Systems (AREA)
Abstract
The invention relates to the technical field of automotive electronics, in particular to a brake signal input processing circuit and a diagnosis method. The brake signal input processing circuit comprises a brake switch signal input end, a brake light signal input end, a brake light and a main chip. The brake signal input processing circuit further comprises a digital quantity processing chip. The brake switch signal input end is connected to the digital quantity processing chip through a normally open contact switch, the brake light signal input end is connected to the main chip through the normally open contact switch, the brake light is connected between the normally closed contact switch and the main chip, and the brake light is connected to the ground. The brake signal input processing circuit inputs a brake switch signal into the digital quantity processing chip, and inputs a brake light signal into the main chip, the two chips process the two signals respectively, when one chip goes wrong, the other chip can still collect the signal normally, effective collection of the brake signal is guaranteed, thus the cruising function can be automatically removed, and the safety is high.
Description
Technical field
The present invention relates to technical field of automotive electronics, and in particular to a kind of brake signal input processing circuit and diagnosis side
Method.
Background technology
With the development of automotive electronics, automotive electronics functional safety requires further strict.The correct collection of brake signal with
Cruise is closely related, if failing crucial moment to exit cruise in time, will cause larger potential safety hazard, therefore brake signal conduct
One of condition that cruise function is automatically terminated, processes need to its signal input and diagnose more reliable, the risk that reduction can be estimated,
Reduce exploitation defect.Conventional brake signal processing mode is that brake modulating signal and brake switch signal are input into electromotor control
Device master chip processed is acted upon, and when engine controller master chip breaks down, brake modulating signal and brake switch signal are equal
Failure, effectively gathers so as to carry out brake signal, and cruise function cannot be automatically terminated, and there is larger potential safety hazard.
The content of the invention
To solve above-mentioned technical problem, the invention provides a kind of brake modulating signal and brake switch signal will not lose simultaneously
Effect, and the brake signal input processing circuit and diagnostic method of brake modulating signal and the detection of brake switch signal fault can be taken into account.
With regard to a kind of brake signal input processing circuit of the invention, its technical scheme is：Including brake switch signal input
End, brake lamp signal input part, brake lamp and master chip, also including digital quantity process chip, the brake switch signal input
End by normally-closed contact switch be connected with digital quantity process chip, the brake lamp signal input part pass through normally opened contact switch and
Master chip connects, and the brake lamp is connected between normally opened contact switch and master chip, the brake lamp ground connection.
Further, the normally-closed contact switch and normally opened contact switch are gang switch, when normally-closed contact switch
During disconnection, the normally opened contact switch is connected, and when the normally-closed contact switch connection, the normally opened contact switch disconnects.
With regard to a kind of brake signal diagnostic method of the invention, its technical scheme is：Brake switch signal and brake lamp are believed
Number be input into different chips and to be processed, and GES is acquired, when in the stipulated time speed rise to V1 or under
When being down to V2, the level of brake switch signal or brake modulating signal is detected, according to level whether saltus step judging brake
Switching signal or brake modulating signal whether there is failure.
Further, when speed is less than V2 and brake switch signal is low level, if speed rises in the stipulated time
More than V1, and brake switch signal remains as low level, or
When speed is more than V1 and brake switch signal is high level, if speed deteriorates to less than V2 in the stipulated time, and
Brake switch signal remains as high level, then be judged as that brake switch signal breaks down.
Further, when speed is less than V2 and the modulating signal that brakes is high level, if speed rises to greatly in the stipulated time
In V1, and the modulating signal that brakes remains as high level, or
When speed is more than V1 and the modulating signal that brakes is low level, if speed deteriorates to less than V2 in the stipulated time, and stop
Car light signal remains as low level, then be judged as that brake modulating signal breaks down.
Further, the vehicle velocity V 1 takes 35-45.
Further, the vehicle velocity V 2 takes 2-8.
Further, the stipulated time is 2-8s.
Beneficial effects of the present invention are：The present invention believes brake switch signal input to digital quantity process chip, brake lamp
Number it is input into master chip, two chips are processed two signals respectively, when one of chip failure, another
Chip still can normal acquisition signal, it is ensured that effective collection of brake signal, cruise function is automatically terminated, safety
It is high.By being monitored to GES, whether saltus step is occurred according to the level of brake switch signal or brake modulating signal, to stopping
Stopping switch signal and brake modulating signal carry out fault diagnosis, further ensure the transmitting of signal.
Description of the drawings
Fig. 1 is conventional brake signal input process circuit schematic diagram；
Fig. 2 is brake signal input processing circuit schematic diagram of the present invention；
Fig. 3 is brake signal diagnostic flow chart of the present invention；
Specific embodiment
Below in conjunction with the drawings and specific embodiments, the present invention is described in further detail：
If as shown in figure 1, brake switch signal and brake modulating signal access digital quantity process chip, breaking down then two
Individual signal fails.
As shown in Fig. 2 brake switch signal input part is connected by normally-closed contact switch with digital quantity process chip, brake
Modulating signal input is connected by normally opened contact switch with master chip, brake lamp be connected to normally opened contact switch and master chip it
Between, brake lamp ground connection.It is gang switch that normally-closed contact is switched with normally opened contact switch, normally opened when normally-closed contact is switched off
Contact switch is connected, and when normally-closed contact switch connection, normally opened contact switch disconnects.When being opened a way due to the modulating signal that brakes, input
It is directly grounded by brake lamp, input is pulled low, if brake lamp signal input is to digital quantity process chip, due to digital quantity process
Low current is there may be in chip, and the electric current of 4mA levels can just light the brake lamp of LED forms, cause extraneous by mistake by brake lamp
The situation of signal open circuit is judged as vehicle brake, therefore brake switch signal is accessed to into digital quantity process chip, and brake modulating signal
Access master chip.
Master chip in engine controller receives brake modulating signal, and digital quantity process chip receives brake switch signal,
High level is 12V, and low level is 0V, and brake switch is normally closed, and brake lamp switch is normally opened.When brake is stepped on, brake lamp letter
Number it is set to " 1 ", brake switch signal is set to " 0 "；When brake is not stepped on, brake modulating signal is set to " 0 ", and brake switch signal sets
For " 1 ".If reading brake lamp, switching signal for " 10 ", it is believed that brake signal is normal, vehicle brake；If reading brake lamp, switch
Signal is " 01 ", it is believed that brake signal is normal, normal vehicle operation；If it is " 11 " or " 00 " to read brake lamp, switching signal, recognize
For brake signal exception, failure notification is sent to driver.
As shown in figure 3, when speed be more than 40 (this speed can be demarcated), and brake modulating signal be " 0 " when, vehicle run one section
After time, if detect speed drops to 5 (this speed can be demarcated) in 2s～8s, and brake is during this period of time not detected by
Modulating signal is changed into 1 from 0, it is believed that brake lamp signal fault, and sends DTC；In the same manner, when speed, more than 40, (this speed can be marked
It is fixed), and brake switch signal, when being " 1 ", vehicle did not dropped to 5 in 2～8 seconds, was not detected by the modulating signal that brakes this period
It is changed into 0 from 1, it is believed that brake switch signal fault, sends DTC.
When speed be less than 5 (i.e. V2, this speed can be demarcated), and brake modulating signal be " 1 " when, vehicle operation a period of time
Afterwards, if detect speed rises to 40 (i.e. V1, this speed can be demarcated) in 2s～8s (this time can be demarcated), and in this section
Time is not detected by brake modulating signal and is changed into " 0 " from " 1 ", it is believed that brake lamp signal fault, and sends DTC；In the same manner, car is worked as
Speed be less than 5 (this speed can be demarcated), and brake switch be " 0 " when, vehicle did not rose to 40 in 2～8 seconds, and this period is not examined
Measure brake switch signal and be changed into 1 from 0, it is believed that brake switch signal fault, send DTC.
The above, specific embodiment only of the invention, it is noted that any those of ordinary skill in the art exist
Disclosed herein technical scope in, the change or replacement that can be readily occurred in, all should cover protection scope of the present invention it
It is interior.
Claims (8)
1. a kind of brake signal input processing circuit, including brake switch signal input part, brake lamp signal input part, brake lamp
And master chip, it is characterised in that：Also include digital quantity process chip, the brake switch signal input part is opened by normally-closed contact
Pass is connected with digital quantity process chip, and the brake lamp signal input part is connected by normally opened contact switch with master chip, described
Brake lamp is connected between normally opened contact switch and master chip, the brake lamp ground connection.
2. as claimed in claim 1 a kind of brake signal input processing circuit, it is characterised in that：Normally-closed contact switch with it is normal
Contact switch is opened for gang switch, when the normally-closed contact is switched off, the normally opened contact switch connection, when described normally closed
When contact switch is connected, the normally opened contact switch disconnects.
3. a kind of brake signal diagnostic method, it is characterised in that：By brake switch signal and brake lamp signal input to different
Chip is processed, and GES is acquired, when speed rises to V1 or drops to V2 in the stipulated time, to brake
The level of switching signal or brake modulating signal detected, according to level whether saltus step judging brake switch signal or brake lamp
Signal has fault-free.
4. as claimed in claim 3 a kind of brake signal diagnostic method, it is characterised in that：
When speed is less than V2 and brake switch signal is low level, if speed is risen to more than V1 in the stipulated time, and brake
Switching signal remains as low level, or
When speed is more than V1 and brake switch signal is high level, if speed deteriorates to less than V2 in the stipulated time, and brake
Switching signal remains as high level, then be judged as that brake switch signal breaks down.
5. as claimed in claim 3 a kind of brake signal diagnostic method, it is characterised in that：
When speed is less than V2 and the modulating signal that brakes is high level, if speed is risen to more than V1 in the stipulated time, and brake lamp
Signal remains as high level, or
When speed is more than V1 and when the modulating signal that brakes is low level, if speed deteriorates to less than V2 in the stipulated time, and brake lamp
Signal remains as low level, then be judged as that brake modulating signal breaks down.
6. as claimed in claim 3 a kind of brake signal diagnostic method, it is characterised in that：The vehicle velocity V 1 takes 35-45.
7. as claimed in claim 3 a kind of brake signal diagnostic method, it is characterised in that：The vehicle velocity V 2 takes 2-8.
8. a kind of brake signal diagnostic method as described in any one in claim 3-7, it is characterised in that：During the regulation
Between be 2-8s.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610714984.9A CN106627364A (en) | 2016-08-24 | 2016-08-24 | Brake signal input processing circuit and diagnosis method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610714984.9A CN106627364A (en) | 2016-08-24 | 2016-08-24 | Brake signal input processing circuit and diagnosis method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106627364A true CN106627364A (en) | 2017-05-10 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610714984.9A Pending CN106627364A (en) | 2016-08-24 | 2016-08-24 | Brake signal input processing circuit and diagnosis method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107344525A (en) * | 2017-06-30 | 2017-11-14 | 北京新能源汽车股份有限公司 | A kind of pedestrian avoids suggestion device and automobile |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101367352A (en) * | 2008-06-06 | 2009-02-18 | 奇瑞汽车股份有限公司 | Automobile brake lamp control device and control method thereof |
| KR20110133896A (en) * | 2010-06-07 | 2011-12-14 | 현대모비스 주식회사 | Brake light switch |
| CN102490717A (en) * | 2011-12-20 | 2012-06-13 | 奇瑞汽车股份有限公司 | Brake switch control system for electric automobile, and control method and fault diagnosis method for brake switch control system |
| CN102826039A (en) * | 2011-06-13 | 2012-12-19 | 现代自动车株式会社 | Stop lamp drive apparatus |
| CN104986156A (en) * | 2015-06-03 | 2015-10-21 | 安徽江淮汽车股份有限公司 | Brake switch fault diagnosis method and system |
-
2016
- 2016-08-24 CN CN201610714984.9A patent/CN106627364A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101367352A (en) * | 2008-06-06 | 2009-02-18 | 奇瑞汽车股份有限公司 | Automobile brake lamp control device and control method thereof |
| KR20110133896A (en) * | 2010-06-07 | 2011-12-14 | 현대모비스 주식회사 | Brake light switch |
| CN102826039A (en) * | 2011-06-13 | 2012-12-19 | 现代自动车株式会社 | Stop lamp drive apparatus |
| CN102490717A (en) * | 2011-12-20 | 2012-06-13 | 奇瑞汽车股份有限公司 | Brake switch control system for electric automobile, and control method and fault diagnosis method for brake switch control system |
| CN104986156A (en) * | 2015-06-03 | 2015-10-21 | 安徽江淮汽车股份有限公司 | Brake switch fault diagnosis method and system |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107344525A (en) * | 2017-06-30 | 2017-11-14 | 北京新能源汽车股份有限公司 | A kind of pedestrian avoids suggestion device and automobile |
| CN107344525B (en) * | 2017-06-30 | 2019-10-29 | 北京新能源汽车股份有限公司 | A kind of pedestrian avoids suggestion device and automobile |
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| PB01 | Publication | ||
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Application publication date: 20170510 |