CN101863269A - Electronic braking pedal - Google Patents
Electronic braking pedal Download PDFInfo
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- CN101863269A CN101863269A CN201010205004A CN201010205004A CN101863269A CN 101863269 A CN101863269 A CN 101863269A CN 201010205004 A CN201010205004 A CN 201010205004A CN 201010205004 A CN201010205004 A CN 201010205004A CN 101863269 A CN101863269 A CN 101863269A
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- 238000012545 processing Methods 0.000 claims abstract description 33
- 238000006073 displacement reaction Methods 0.000 claims abstract description 18
- 239000011159 matrix material Substances 0.000 claims description 31
- 230000008859 change Effects 0.000 claims description 9
- 230000017105 transposition Effects 0.000 claims description 6
- 239000003990 capacitor Substances 0.000 abstract description 9
- 238000000034 method Methods 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 1
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Abstract
The invention provides an electronic braking pedal control system for an automobile, comprising a pedal base (1). The control system further comprises a capacitor type angular displacement sensor (2), a signal processing module, and an electronic control unit ECU. The capacitor type angular displacement sensor (2) is connected with the pedal base (1) to acquire the angular displacement signal of the pedal base (1); the signal processing module is connected with the capacitor type angular displacement sensor (2) and is used for processing the acquired angular position signal; the electronic control unit ECU is connected with the signal processing module and is used for carrying out control operation according to the processing result of the signal processing module. By adopting the electronic braking pedal control system for automobiles of the invention, the real-time performance and the control precision of the electronic braking system are improved.
Description
Technical field
The present invention relates to the automobile brake field, be specifically related to a kind of electronic brake pedal control system.
Background technology
In traditional brake system of car, pedal is the steering unit of automobile control throttle, and along with application and the development of electron controls technology on automobile, gather the signal of pedal and be sent to controller and carry out the requisite measure that comprehensive treatment has been a raising automobile controlling level.
In the prior art, gather the signal of pedal by Hall element, electronic control unit ECU handles these signals, treating process is as follows: electronic control unit ECU need gather the value of pedal continuous state, the a series of values that to close on compare computing to judge the unit time rate of change of pedal position, pedal position rate and pedal final position signal synthesis get up the most at last, judge that the current braking mode of automobile is general braking or emergency braking, so that actual required braking force during electronic control unit ECU output car brakeing.
Because the pedal signal of Hall element collection and pedal corner are not linear relationships completely, generally need in program, carry out software algorithm match (compensation), simultaneously when being judged, the car brakeing state need calculate pedal position unit time rate of change, must reduce the real-time of system, and then the precision of influence meeting control.
Summary of the invention
The purpose of this invention is to provide a kind of electronic brake pedal control system, its signal and pedal corner simple in structure and that gather are linear, have improved the precision of control greatly.
For achieving the above object, the present invention has adopted following technical scheme: a kind of electronic brake pedal control system, comprise the pedal matrix, and described control system also comprises:
Capacitive angular sensor is connected with the pedal matrix, to obtain the angular displacement signal of pedal matrix;
Signal processing module is connected with capacitive angular sensor, is used for the described angular displacement signal that obtains is handled;
Electronic control unit ECU is connected with described signal processing module, is used for controlling according to the result of described signal processing module.
The theoretical calculation formula of capacitive angular sensor is:
Can get C by theoretical formula
0Be constant, linear between sensor capacitance C and angular displacement, and because the stroke range of pedal matrix is 0 to spend between 45 degree, so the signal and the linearity between the pedal corner that capacitive angular sensor collects are very good.
The working process of technical scheme is as follows among the present invention: capacitive angular sensor is gathered the analog voltage signal that produces when the pedal matrix moves, and this analog voltage signal incoming signal processing module is handled; Signal processing module changes analog voltage signal into digital pulse signal, and exports this digital pulse signal to electronic control unit ECU; The analog voltage signal that described capacitive angular sensor collects changes fast more, and the frequency of the digital pulse signal of signal processing module output is just big more, the two proportional relation; Described electronic control unit ECU only needs the frequency of impulse singla in the unit of account time, and the state in the time of can judging car brakeing is concrete, and the frequency of impulse singla surpasses when threshold value is set in the unit time, and pedal is an emergency braking; The frequency of impulse singla is lower than when threshold value is set in unit time, and pedal is common braking.
The invention has the advantages that: the technical scheme among the present invention does not need to gather the position rate of glancing impact pedal matrix and the final position signal of pedal matrix, do not need these signals are handled calculating yet, it is the calculating link that the present invention has saved A and D converter AD conversion and pedal matrix location rate of change, and then correspondingly reduced computing time of electronic control unit ECU, simplified judgement greatly, improved the real-time of electric brake system pedal matrix actual condition.
Description of drawings
Fig. 1 is a structural representation of the present invention;
Fig. 2 is the electrical block diagram of signal processing module.
The specific embodiment
As shown in Figure 1, a kind of electronic brake pedal control system comprises pedal matrix 1, and described control system also comprises: the capacitive angular sensor 2 that is connected with pedal matrix 1, and capacitive angular sensor 2 is in order to obtain the angular displacement signal of pedal matrix 1; With capacitive angular sensor 2 bonded assembly signal processing modules 5, and with described signal processing module 5 bonded assembly electronic control unit ECU; An end that is hinged with car body of pedal matrix 1 is provided with vacuum booster unit 4.
Further, described pedal matrix 1 links to each other with car body by S. A., and capacitive angular sensor 2 is arranged on the S. A. place, gathers the angular displacement signal of pedal matrix 1 to help capacitive angular sensor 2.
Described signal processing module 5 is electrically connected with the power input and the signal output part of capacitive angular sensor 2 respectively, and the mouth 3 of signal processing module 5 is electrically connected with electronic control unit ECU, and electronic control unit ECU is electrically connected with brake actuator.
The working process of technical scheme is specific as follows among the present invention:
When pedal matrix 1 changed with respect to the angular transposition of S. A., capacitive angular sensor 2 obtained the voltage signal of corresponding described angular transposition, and the angular transposition of described pedal matrix 1 and the magnitude of voltage of described voltage signal are linear; The variation in angular displacement rate of described pedal matrix 1 and the magnitude of voltage rate of change of described voltage signal are the linear positive relation.
The voltage signal that described signal processing module obtains according to capacitive angular sensor 2, described voltage signal is handled, described voltage signal is converted into impulse singla, and the magnitude of voltage rate of change of the frequency of described impulse singla and described voltage signal is the linear positive relation.
Described electronic control unit ECU specifically is used for: when the frequency of described impulse singla surpasses when threshold value is set, described electronic control unit ECU judges that vehicle is under the emergency braking condition, and vehicle is carried out control policy under the emergency braking condition; When the frequency of described impulse singla is lower than when threshold value is set, described electronic control unit ECU judges that vehicle is under the common braking mode, and vehicle is carried out control policy under the common braking mode.
Further, capacitive angular sensor 2 has 3 lines to link to each other with signal processing module 5, be respectively power lead, ground wire and output line, capacitive angular sensor 2 obtains power supply from signal processing module 5, and the angle displacement voltage signal of output pedal matrix is given signal processing module 5, the change frequency of the angle displacement voltage signal that 5 bases of signal processing module receive is to electronic control unit ECU output digital pulse signal, and electronic control unit ECU is connected the braking with final realization automotive wheel with brake actuator.
As shown in Figure 2, described signal processing module 5 comprises comparator A1, the A2 of two parallel connections, the voltage signal U of capacitive angular sensor 2 outputs
rTrigger two comparator A1, A2 respectively, the voltage pulse waveforms that two comparator A1, A2 outgoing level are opposite also triggers flip-flop multivibrator B, the voltage of flip-flop multivibrator B output carries out charge or discharge by two parallel resistor R1, R2 to capacitor C 1, the C2 of two parallel connections, two capacitor C 1, C2 link to each other respectively to form resonance with the input end of two comparator A1, A2, make the signal output part that links to each other with the electronic control unit ECU 3 output wave shape frequencies of flip-flop multivibrator B and the proportional voltage signal U of variation in angular displacement speed of pedal matrix 1
Ab
With comparator A1 is example, one of them input end of described comparator A1 links to each other with the signal output part of sensor 2, the mouth of comparator A1 links to each other with the input end of flip-flop multivibrator B, two mouths of flip-flop multivibrator B are all successively by mutual series connected resistance R 1 and capacitor C 1 ground connection, an end that links to each other with resistance R 1 of capacitor C 1 links to each other with another input end of comparator A1, and the end that links to each other with resistance R 1 of flip-flop multivibrator B is provided with the signal output part that links to each other with electronic control unit ECU.
Further, the resistance R 1 that mouth described and flip-flop multivibrator B links to each other, the two ends of R2 all are parallel with diode, the mouth of two diode VD1, VD2 all links to each other with the mouth of flip-flop multivibrator B, diode VD1, VD2 play the effect of noise reduction, filtering, to help the reliable and stable work of signal processing module 5.
Comprehensively above-mentioned, the voltage of flip-flop multivibrator B output will be respectively to capacitor C 1, C2 charging or discharge by resistance R 1, R2, the charging that capacitor C 1, C2 do not stop, discharge process will form resonance with comparator A1, A2, and then realize whole signal processing module 5 in-to-in resonance, the width of signal processing module 5 output pulses this moment changes with the variation of sensor capacitance, makes signal processing module 5 realize the digitized conversion of capacitive angular sensor voltage signal by resonance.
Utilize electronic brake pedal of the present invention, when push down on the pedal matrix 1, built-in capacitive angular sensor will be according to the variation of the angle displacement of pedal matrix 1, and makes the voltage signal U of output
AbThe corresponding variation taken place, and the voltage signal U of the frequency of signal processing module 5 output wave shapes and capacitive angular sensor output
rThe linear ratio of rate of change, can judge the stroke and the vehicle braked state of pedal matrix by the number of the pulse of electronic control unit ECU counter measures in the unit time, therefore the present invention has simple in structure, safe and reliable, low cost of manufacture, advantages such as easy to maintenance and applying flexible.
The above only is preferred embodiment of the present invention, and is in order to restriction the present invention, within the spirit and principles in the present invention not all, any modification of being done, is equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (8)
1. an electronic brake pedal control system comprises pedal matrix (1), it is characterized in that described control system also comprises:
Capacitive angular sensor (2) is connected with pedal matrix (1), to obtain the angular displacement signal of pedal matrix (1);
Signal processing module is connected with capacitive angular sensor (2), is used for the described angular displacement signal that obtains is handled;
Electronic control unit ECU is connected with described signal processing module, is used for controlling according to the result of described signal processing module.
2. electronic brake pedal control system as claimed in claim 1 is characterized in that: described pedal matrix (1) is connected with car body by S. A., and capacitive angular sensor (2) is arranged on described S. A. place.
3. electronic brake pedal control system as claimed in claim 2 is characterized in that:
When pedal matrix (1) changed with respect to the angular transposition of S. A., capacitive angular sensor (2) obtained the voltage signal of corresponding described angular transposition,
The angular transposition of described pedal matrix (1) and the magnitude of voltage of described voltage signal are linear;
The variation in angular displacement rate of described pedal matrix (1) and the magnitude of voltage rate of change of described voltage signal are the linear positive relation.
4. electronic brake pedal control system as claimed in claim 3 is characterized in that:
The voltage signal that described signal processing module obtains according to capacitive angular sensor (2), described voltage signal is handled, described voltage signal is converted into impulse singla, and the magnitude of voltage rate of change of the frequency of described impulse singla and described voltage signal is the linear positive relation.
5. as claim 1 or 4 each described electronic brake pedal control system, it is characterized in that described electronic control unit ECU specifically is used for:
When the frequency of described impulse singla surpasses when threshold value is set, described electronic control unit ECUECU judges that vehicle is under the emergency braking condition, and vehicle is carried out control policy under the emergency braking condition;
When the frequency of described impulse singla is lower than when threshold value is set, described electronic control unit ECUECU judges that vehicle is under the common braking mode, and vehicle is carried out control policy under the common braking mode.
6. electronic brake pedal control system according to claim 1, it is characterized in that: described signal processing module comprises the comparator (A1 of two parallel connections, A2), the signal of capacitive angular sensor (2) output triggers two comparator (A1 respectively, A2), two comparator (A1, A2) voltage pulse waveforms that outgoing level is opposite and trigger flip-flop multivibrator (B), the voltage of flip-flop multivibrator (B) output is by two parallel resistor (R1, R2) to the electric capacity (C1 of two parallel connections, C2) carry out charge or discharge, two electric capacity (C1, C2) with two comparator (A1, A2) input end links to each other respectively to form resonance, makes the signal output part output wave shape frequency that links to each other with electronic control unit ECU of flip-flop multivibrator (B) becomes linear positive to concern with the variation in angular displacement rate of pedal matrix (1) voltage signal.
7. electronic brake pedal control system according to claim 6, it is characterized in that: one of them input end of described comparator links to each other with the signal output part of sensor (2), the mouth of comparator links to each other with the input end of flip-flop multivibrator (B), two mouths of flip-flop multivibrator (B) are all successively by mutual series connected resistance and capacity earth, an end that links to each other with resistance of electric capacity links to each other with another input end of comparator, and an end that links to each other with resistance of flip-flop multivibrator (B) is provided with the signal output part that links to each other with electronic control unit ECU.
8. electronic brake pedal control system according to claim 6, it is characterized in that: the two ends of the resistance that mouth described and flip-flop multivibrator (B) links to each other are parallel with diode, and the mouth of diode links to each other with the mouth of flip-flop multivibrator (B).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010205004A CN101863269A (en) | 2010-06-18 | 2010-06-18 | Electronic braking pedal |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010205004A CN101863269A (en) | 2010-06-18 | 2010-06-18 | Electronic braking pedal |
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| CN101863269A true CN101863269A (en) | 2010-10-20 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201010205004A Pending CN101863269A (en) | 2010-06-18 | 2010-06-18 | Electronic braking pedal |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103395413A (en) * | 2013-08-09 | 2013-11-20 | 重庆大学 | Electronic brake pedal for automobile |
| CN109164312A (en) * | 2018-07-25 | 2019-01-08 | 江苏敏安电动汽车有限公司 | Acceleration pedal of electric automobile checking algorithm |
| CN110712632A (en) * | 2018-12-09 | 2020-01-21 | 曹显亮 | Automobile capable of quickly implementing service braking or emergency braking by hand energy and operation method |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1785727A (en) * | 2004-12-10 | 2006-06-14 | 比亚迪股份有限公司 | Hydraulic assisted braking system of electric power automobile |
| CN2885713Y (en) * | 2006-04-19 | 2007-04-04 | 西南大学 | Electronic sensing pedal |
| CN101152864A (en) * | 2006-09-30 | 2008-04-02 | 比亚迪股份有限公司 | Braking system of electric car |
| CN101580061A (en) * | 2009-06-25 | 2009-11-18 | 浙江亚太机电股份有限公司 | Brake method capable of distinguishing brake intention of driver |
-
2010
- 2010-06-18 CN CN201010205004A patent/CN101863269A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1785727A (en) * | 2004-12-10 | 2006-06-14 | 比亚迪股份有限公司 | Hydraulic assisted braking system of electric power automobile |
| CN2885713Y (en) * | 2006-04-19 | 2007-04-04 | 西南大学 | Electronic sensing pedal |
| CN101152864A (en) * | 2006-09-30 | 2008-04-02 | 比亚迪股份有限公司 | Braking system of electric car |
| CN101580061A (en) * | 2009-06-25 | 2009-11-18 | 浙江亚太机电股份有限公司 | Brake method capable of distinguishing brake intention of driver |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103395413A (en) * | 2013-08-09 | 2013-11-20 | 重庆大学 | Electronic brake pedal for automobile |
| CN103395413B (en) * | 2013-08-09 | 2015-09-16 | 重庆大学 | Electronic brake pedal for automobile |
| CN109164312A (en) * | 2018-07-25 | 2019-01-08 | 江苏敏安电动汽车有限公司 | Acceleration pedal of electric automobile checking algorithm |
| CN109164312B (en) * | 2018-07-25 | 2021-07-16 | 江苏敏安电动汽车有限公司 | Electric automobile accelerator pedal checking algorithm |
| CN110712632A (en) * | 2018-12-09 | 2020-01-21 | 曹显亮 | Automobile capable of quickly implementing service braking or emergency braking by hand energy and operation method |
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Application publication date: 20101020 |