CN101832798A - Intelligent instrument panel of electric vehicle - Google Patents
Intelligent instrument panel of electric vehicle Download PDFInfo
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- CN101832798A CN101832798A CN 201010170381 CN201010170381A CN101832798A CN 101832798 A CN101832798 A CN 101832798A CN 201010170381 CN201010170381 CN 201010170381 CN 201010170381 A CN201010170381 A CN 201010170381A CN 101832798 A CN101832798 A CN 101832798A
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- panel board
- electric motor
- chip microcomputer
- pointer
- conversion chip
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Abstract
The invention relates to an intelligent instrument panel of an electric vehicle, comprising a speed and distance measurement sensor, a singlechip, a D/A (Digital-Analogue) conversion chip, a stepping motor drive circuit, an instrument panel, an RS232 (Recommend Standard 232) conversion circuit and an EEPROM (Electrically Erasable Programmable Read-Only Memory), wherein the singlechip is respectively connected with the speed and distance measurement sensor, the D/A conversion chip, the RS232 conversion circuit and the EEPROM; and the D/A conversion chip, the stepping motor drive circuit and the instrument panel are sequentially connected. Compared with the prior art, the invention has the advantages of high precision, low power consumption, long service life, fast reaction, high sensitivity, and the like.
Description
Technical field
The present invention relates to a kind of instrument panel of electric vehicle, especially relate to a kind of electric motor intelligent panel board.
Background technology
Conventional instrument exists precision low, and degree of stability is not high, and thermal value is big, and power consumption is many, and is fragile, shortcomings such as open difference.Especially when instrument returned zero, the pointer bump produced vibration after zero point, cause instrument to damage easily, and pointer can't accurately be got back to zero point.Instrument can produce very big error in display speed like this.
Summary of the invention
Purpose of the present invention is exactly to provide the high and low power consumption of a kind of precision, long service life, fast, the highly sensitive electric motor intelligent panel board of reaction velocity for the defective that overcomes above-mentioned prior art existence.
Purpose of the present invention can be achieved through the following technical solutions:
A kind of electric motor intelligent panel board, it is characterized in that, comprise the distance measuring sensor that tests the speed, single-chip microcomputer, D/A conversion chip, stepper motor driving circuit, panel board, RS232 change-over circuit, eeprom memory, described single-chip microcomputer is connected with the distance measuring sensor that tests the speed, D/A conversion chip, RS232 change-over circuit, eeprom memory respectively, and described D/A conversion chip, stepper motor driving circuit, panel board connect successively.
Described single-chip microcomputer is the MSP430 single-chip microcomputer.
Described eeprom memory and D/A conversion chip communicate by I2C bus and single-chip microcomputer.
Described D/A conversion chip is the D/A conversion chip of 12 precision of 4 passages.
Described stepper motor driving circuit is an operational amplification circuit.
Described panel board comprises two-phase induction type stepper motor, pointer, mileage display and dial plate.
Carry out a pointer after the described panel board energising and return zeroing.
Described pointer returns zeroing and may further comprise the steps:
At first adopt the zero-bit of the internal mechanical link stopper definition pointer of motor, adopt full scale zero the mode of returning allow gage pointer zero-returning then.
Compared with prior art, the present invention has the following advantages:
1, the high and low power consumption of precision;
2, long service life;
3, reaction velocity is fast, highly sensitive.
Description of drawings
Fig. 1 is a circuit block diagram of the present invention.
Embodiment
The present invention is described in detail below in conjunction with the drawings and specific embodiments.
Embodiment
As shown in Figure 1, a kind of electric motor intelligent panel board, it is characterized in that, comprise the distance measuring sensor 1 that tests the speed, single-chip microcomputer 2, D/A conversion chip 6, stepper motor driving circuit 7, panel board 8, RS232 change-over circuit 3, eeprom memory 4, described single-chip microcomputer 2 is connected with the distance measuring sensor 1 that tests the speed, D/A conversion chip 6, RS232 change-over circuit 3, eeprom memory 4 respectively, and described D/A conversion chip 6, stepper motor driving circuit 7, panel board 8 connect successively.Described single-chip microcomputer 2 is the MSP430 single-chip microcomputer.Described eeprom memory 4 and D/A conversion chip 6 communicate by I2C bus 5 and single-chip microcomputer 2.Described D/A conversion chip 6 is the D/A conversion chip of 12 precision of 4 passages.Described stepper motor driving circuit 7 is an operational amplification circuit.Described panel board 8 comprises two-phase induction type stepper motor, pointer, mileage display and dial plate.Carry out a pointer after described panel board 8 energisings and return zeroing.Described pointer returns zeroing and may further comprise the steps: at first adopt the zero-bit of the internal mechanical link stopper definition pointer of motor, adopt full scale zero the mode of returning allow gage pointer zero-returning then.
The distance measuring sensor 1 that tests the speed is converted to the travel speed of electric motor car the signal of a series of frequencies; Whenever travel 1 kilometer distance of electric motor car is converted to a pulse signal.MSP430 single-chip microcomputer 2 is by catching mouth, catch the test the speed rate signal of distance measuring sensor 1 and the pulse signal of mileage.MSP430 single-chip microcomputer 2 is analyzed the rate signal that captures and handle, and is corresponding speed with frequency inverted.For the mileage pulse signal that captures, whenever capture a pulse signal, the mileage sum increases by 1 kilometer.Mileage sum with adding up stores eeprom memory 4 into, and mileage number is presented on the mileage display in the panel board 8.Even the mileage that power down like this, electric motor car are travelled still can be preserved.RS232 change-over circuit 3 is serial interface circuits that MSP430 single-chip microcomputer and computing machine communicate, and when electric motor car needs repairing, can obtain data in the MSP430 single-chip microcomputer 2 by the RS232 interface.
MSP430 single-chip microcomputer 2 is a high-performance of TI company, the microprocessor of low-power consumption.MSP430 single-chip microcomputer 2 is in sleep state when flat, cuts down the consumption of energy; When interrupting arriving, the CPU in the single-chip microcomputer is waken up, and carries out corresponding program, finishes the function of appointment.Described D/A conversion chip 6 adopts the D/A conversion chip of 4 tunnel 12 precision, can satisfy high-resolution requirement, and can control 2 stepper motors simultaneously at most.
Before carrying out Stepping Motor Control, earlier the PWM ripple in the stepper motor one-period was subdivided into for 240 steps.Under a proportional relationship, sine table is made in this 240 step segmentation, left in the MSP430 single-chip microcomputer 2.When system switched on, system carried out initialization.MSP430 single-chip microcomputer 2 communicates by I2C bus 5 with the eeprom memory 4 of depositing mileage, obtains the mileage of current electric motor car, and by the I/O mouth of MSP430 single-chip microcomputer 2 mileage is presented on the display of panel board 8.Panel board 8 can once reset simultaneously, and promptly the dial plate pointer returns zero.Adopt the internal mechanical link stopper of motor to define the zero-bit of pointer, and adopt full scale zero the mode of returning allow gage pointer zero-returning.For allowing pointer undisturbedly get back to zero-bit stably, and the violent shake of unlikely generation when contacting the motor internal block, pointer need be accelerated to higher speed.Through after the acceleration of short time, pointer high-speed impact zero point since this moment the stepper motor input pulse frequency very high, pointer hits zero back speed and reduces to zero, stepper motor is step-out immediately.Adopt this technology, the vibration that the pointer bump produces zero point in the time of can reducing panel board 8 and reset.Pointer is got back to zero point reliably simultaneously.MSP430 single-chip microcomputer 2 is in sleep state when flat, when collection distance measuring sensor 1 signal interruption that tests the speed arrives, MSP430 single-chip microcomputer 2 is waken up, and after the processing through 2 pairs of data of MSP430 single-chip microcomputer, judges whether speed of displaying is identical on present speed and the panel board 8.If different, then MSP430 single-chip microcomputer 2 calculates, and determines that how many steps stepper motor will advance or retreat, and promptly needs the pulse number and the direction that send to stepper motor.MSP430 single-chip microcomputer 2 uses I2C bus 5 to communicate with D/A conversion chip 6, and D/A conversion chip 6 is accepted the data that MSP430 single-chip microcomputer 2 sends, and converts sine wave signal to, exports stepper motor driving circuit 7 to.Stepper motor driving circuit 7 is amplified control signal and is handled, and drive stepping motor is rotated, and realizes that panel board 8 shows the electric motor car travel speed in real time and accurately.
When the 2 interruption arrivals of MSP430 single-chip microcomputer, when capturing the mileage pulse signal of the distance measuring sensor 1 that tests the speed, mileage quantity increases by 1 kilometer, and deposits to eeprom memory 4.And by RS232 change-over circuit 3, can be easily safeguard data in the MSP430 single-chip microcomputer 2 by the RS232 interface.
The present invention is based on the control of MSP430 single-chip microcomputer 2, and when capturing rate signal, 2 pairs of rate signals of MSP430 single-chip microcomputer are handled, and the rotation that comes the control step motor by the segmentation of stepper motor, thereby the instrument speed that realizes intelligence shows.
Claims (8)
1. electric motor intelligent panel board, it is characterized in that, comprise the distance measuring sensor that tests the speed, single-chip microcomputer, D/A conversion chip, stepper motor driving circuit, panel board, RS232 change-over circuit, eeprom memory, described single-chip microcomputer is connected with the distance measuring sensor that tests the speed, D/A conversion chip, RS232 change-over circuit, eeprom memory respectively, and described D/A conversion chip, stepper motor driving circuit, panel board connect successively.
2. a kind of electric motor intelligent panel board according to claim 1 is characterized in that described single-chip microcomputer is the MSP430 single-chip microcomputer.
3. a kind of electric motor intelligent panel board according to claim 1 is characterized in that described eeprom memory and D/A conversion chip communicate by I2C bus and single-chip microcomputer.
4. a kind of electric motor intelligent panel board according to claim 1 is characterized in that, described D/A conversion chip is the D/A conversion chip of 12 precision of 4 passages.
5. a kind of electric motor intelligent panel board according to claim 1 is characterized in that described stepper motor driving circuit is an operational amplification circuit.
6. a kind of electric motor intelligent panel board according to claim 1 is characterized in that described panel board comprises two-phase induction type stepper motor, pointer, mileage display and dial plate.
7. a kind of electric motor intelligent panel board according to claim 6 is characterized in that, carries out a pointer after the described panel board energising and returns zeroing.
8. a kind of electric motor intelligent panel board according to claim 7 is characterized in that described pointer returns zeroing and may further comprise the steps:
At first adopt the zero-bit of the internal mechanical link stopper definition pointer of motor, adopt full scale zero the mode of returning allow gage pointer zero-returning then.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010170381 CN101832798A (en) | 2010-05-10 | 2010-05-10 | Intelligent instrument panel of electric vehicle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010170381 CN101832798A (en) | 2010-05-10 | 2010-05-10 | Intelligent instrument panel of electric vehicle |
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| CN101832798A true CN101832798A (en) | 2010-09-15 |
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| CN 201010170381 Pending CN101832798A (en) | 2010-05-10 | 2010-05-10 | Intelligent instrument panel of electric vehicle |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108082081A (en) * | 2017-12-19 | 2018-05-29 | 东风汽车集团有限公司 | A kind of method for controlling automobile combination meter pointer zero |
| CN113192384A (en) * | 2021-03-18 | 2021-07-30 | 徐州九鼎机电总厂 | Stepping motor driving instrument based on immersive human-computer interaction simulation system |
Citations (2)
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|---|---|---|---|---|
| CN2759053Y (en) * | 2004-12-16 | 2006-02-15 | 上海精密科学仪器有限公司 | Speed regulating control circuit for step electric machine |
| CN101318473A (en) * | 2008-05-22 | 2008-12-10 | 中国科学院电工研究所 | Synthetic meter system of hybrid vehicle |
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2010
- 2010-05-10 CN CN 201010170381 patent/CN101832798A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2759053Y (en) * | 2004-12-16 | 2006-02-15 | 上海精密科学仪器有限公司 | Speed regulating control circuit for step electric machine |
| CN101318473A (en) * | 2008-05-22 | 2008-12-10 | 中国科学院电工研究所 | Synthetic meter system of hybrid vehicle |
Non-Patent Citations (4)
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| 《》 20060526 伟力驱动技术（深圳）有限公司 VID29系列步进电机 第8页第2段 8 , 2 * |
| 《MSP430系列16位超低功耗单片机原理与应用》 20041130 沈建华等 《MSP430系列16位超低功耗单片机原理与应用》 清华大学出版社 第3-6页 , * |
| 《中国优秀硕士学位论文全文数据库》 20070915 耿天文 基于CAN总线的汽车仪表系统 第14，25，34页、图3.1，3.7，3.8 1-8 , 第03期 2 * |
| 《微计算机信息》 20061231 佘建强等 基于MC微控制器的电动车智能仪表研制 第251-253页、图1 1-8 第22卷, 第9-2期 2 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108082081A (en) * | 2017-12-19 | 2018-05-29 | 东风汽车集团有限公司 | A kind of method for controlling automobile combination meter pointer zero |
| CN108082081B (en) * | 2017-12-19 | 2019-11-08 | 东风汽车集团有限公司 | A method of control automobile combination meter pointer zero |
| CN113192384A (en) * | 2021-03-18 | 2021-07-30 | 徐州九鼎机电总厂 | Stepping motor driving instrument based on immersive human-computer interaction simulation system |
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Application publication date: 20100915 |