CN102411083A - Direct current voltage sensor for automobile - Google Patents
Direct current voltage sensor for automobile Download PDFInfo
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- CN102411083A CN102411083A CN2011102035228A CN201110203522A CN102411083A CN 102411083 A CN102411083 A CN 102411083A CN 2011102035228 A CN2011102035228 A CN 2011102035228A CN 201110203522 A CN201110203522 A CN 201110203522A CN 102411083 A CN102411083 A CN 102411083A
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Abstract
The invention discloses a direct current voltage sensor for an automobile. The direct current voltage sensor comprises the following modules which are electrically connected: a rectification module, wherein, an input terminal of the rectification module is connected with a test point of the sensor, and a power supply input terminal of the rectification module is connected with a voltage output terminal of an automobile cell; a signal processing module, wherein an input terminal of the signal processing module is connected with the voltage output terminal of the automobile cell; a dividing voltage module, wherein, an input terminal of the dividing voltage module is connected with a cell, and a clamping voltage terminal of the dividing voltage module is connected with an output terminal of the signal processing module; an analog-to-digital conversion module, wherein, an input terminal of the analog-to-digital conversion module is connected with an output terminal of the dividing voltage module, a power supply terminal of the analog-to-digital conversion module is connected with the output terminal of the signal processing module, and an output terminal of the analog-to-digital conversion module is connected with external display equipment. According to the direct current voltage sensor for the automobile, cell voltage can be measured nearby, magnitude of voltage is output in a digital signal mode for displaying, and problems of transmission distance and display precision are effectively solved.
Description
Technical field
The present invention relates to a kind of battery voltage measurement and display device, particularly a kind of automobile is used the DC voltage sensor.
Background technology
Cell voltage is that the electric automobile display system needs in real time, accurately to present to one of information of human pilot.Because complete vehicle structure is different; The distance of battery and voltage detecting, display unit has nothing in common with each other; The voltage attenuation that forms thus also has nothing in common with each other; Therefore the pointer direct current voltage table of prior art can't satisfy the measurement and the display requirement of batteries of electric automobile voltage, can't solve the problem of transmission range and display precision.
Summary of the invention
The purpose of this invention is to provide a kind of automobile and use the DC voltage sensor, measure cell voltage nearby, and the form output of magnitude of voltage with digital signal is used for showing, efficiently solve the problem of transmission range and display precision.
In order to realize above purpose, the present invention realizes through following technical scheme:
A kind of automobile is used the DC voltage sensor, comprises that circuit connects:
Rectification module, the input end of described rectification module links to each other with the test point of sensor, and its power input connects the voltage output end of automobile batteries;
Signal processing module, the input end of described signal processing module links to each other with the voltage output end of automobile batteries;
Division module, the input end of described division module links to each other with the voltage output end of automobile batteries, and its embedding system voltage end links to each other with the output terminal of described signal processing module;
Analog-to-digital conversion module, the input end of described analog-to-digital conversion module links to each other with the output terminal of division module, and its power end links to each other with the output terminal of signal processing module, and its output terminal links to each other with the display device of outside.
Described signal processing module comprises the circuit connection: signal conditioning circuit, reduction voltage circuit; The input end of described reduction voltage circuit links to each other with the output terminal of signal conditioning circuit, and the output terminal of reduction voltage circuit links to each other with the embedding system voltage end of division module and the power end of analog-to-digital conversion module respectively.
Described division module comprises: the reversal connection diode and the decoupling capacitor of first divider resistance of connecting each other and second divider resistance and series connection each other; The anode of described reversal connection diode links to each other with decoupling capacitor and links to each other with the input end of analog-to-digital conversion module, and the negative electrode of this reversal connection diode links to each other with the output terminal of the reduction voltage circuit of described signal processing module.
Described division module also comprises: the 3rd divider resistance, the two ends of described the 3rd divider resistance link to each other with the tie point of first divider resistance and second divider resistance and the anode of reversal connection diode respectively.
Described first divider resistance is an adjustable resistance.
Described sensor also comprises: the light-coupled isolation module, and the input end of described light-coupled isolation module links to each other with the output terminal of analog-to-digital conversion module, and its output terminal links to each other with the display device of outside.
The present invention compared with prior art has the following advantages:
1, be installed on the battery vehicle complete vehicle structural member nearby, the voltage of measured automobiles battery nearby, it is convenient to install;
2, the different effectively transmission according to data communication speed and communication modes can reach tens meters to several kms;
3. display precision can reach ± 0.05V.
Description of drawings
Fig. 1 is that a kind of automobile of the present invention is with the rectification module of DC voltage sensor and the circuit theory diagrams of signal processing module;
Fig. 2 is the circuit theory diagrams of a kind of automobile of the present invention with the division module of DC voltage sensor;
Fig. 3 is the circuit theory diagrams of a kind of automobile of the present invention with the analog-to-digital conversion module of DC voltage sensor;
Fig. 4 is the circuit theory diagrams of a kind of automobile of the present invention with the light-coupled isolation module of DC voltage sensor.
Embodiment
Below in conjunction with accompanying drawing,, the present invention is done further elaboration through specifying a preferable specific embodiment.
Like Fig. 1～shown in Figure 4, a kind of automobile is used the DC voltage sensor, comprises that circuit connects: rectification module 11, signal processing module 12, division module 13, analog-to-digital conversion module 14.
Wherein, the input end of rectification module 11 links to each other with the test point of sensor, and its power input connects the voltage output end of automobile batteries, and cell voltage is V
Bat
This division module 13 also comprises: the 3rd divider resistance R133; The two ends of the 3rd divider resistance R133 link to each other with the tie point of the first divider resistance R131 and the second divider resistance R132 and the anode of reversal connection diode D131 respectively, and the other end of this first divider resistance R131 is that the input end of division module 13 links to each other with the voltage output end of automobile batteries; In the present embodiment, this first divider resistance R131 is an adjustable resistance, through regulating this adjustable resistance, can regulate output voltage V
OLTSize;
The input end of analog-to-digital conversion module 14 links to each other with the output terminal of division module 13, and the voltage of reception is V
OLT, the power end of analog-to-digital conversion module 14 links to each other with the output terminal of signal processing module 12, and WV is V
CC, its output terminal links to each other with the display device of outside.Certainly, can also link to each other with the output terminal of analog-to-digital conversion module 14 through a light-coupled isolation module 15 is set, the output terminal with light-coupled isolation module 15 is connected to outside display device again.In the present embodiment, analog-to-digital conversion module 14 is selected the PIC16F684 of built-in AD unit for use.
When using; Sensor is installed on the battery complete vehicle structure spare nearby; The voltage of automobile batteries is as the power supply and the input signal of sensor; And the resulting AC signal process of the test point of sensor signal conditioning circuit 121 rectifications becoming direct current signal, this signal voltage value equates with the magnitude of voltage of automobile batteries, again through becoming the voltage V of 0～5V after reduction voltage circuit 122 step-downs
CC, this voltage V
CCAs the power supply signal of analog-to-digital conversion module 14, and the embedding system voltage of bleeder circuit 13; After voltage process bleeder circuit 13 dividing potential drops of automobile batteries, be converted into and be not more than voltage V
CCPromptly the DC voltage of 0～5V is analog voltage signal V
OLT, the analog voltage signal V of this 0～5V
OLTAfter the input analog-to-digital conversion module 14, become the digital square-wave of 0～3FF (binary number), corresponding decimal number is 0～1023, just is divided into 1024 parts to the voltage of automobile batteries, thereby makes measuring error less than per mille.
Adopt light-coupled isolation module 15 as shown in Figure 4, with digital square-wave through light-coupled isolation after, effectively remove and digital square-wave exported to display device after disturbing, restore magnitude of voltage after display device is handled through square-wave signal and be used for showing.
The above embodiments of the present invention are exemplary; Be in order to make those skilled in the art can better understand content of the present invention; Should not be construed as is the restriction to protection domain of the present invention, and being equal to that any announcement spirit according to the present invention is done changed or revised, and for example: this digital square-wave is according to the different interface requirement of the display device of outside; Adopt wireless communication mode directly digital square-wave to be sent to display device, after display device conversion reduction, demonstrate magnitude of voltage; Perhaps select the corresponding output end of analog-to-digital conversion module 14, directly send to the technical scheme of display device through the cabled digital communication modes of CAN bus or RS232 bus, all in protection domain of the present invention.
No matter adopt above-mentioned which kind of transmission mode can guarantee that in corresponding transmission range, the transmission error of digital signal is zero.
In sum, a kind of automobile of the present invention is used the DC voltage sensor, measures cell voltage nearby, and the form output of magnitude of voltage with digital signal is used for showing, efficiently solves the problem of transmission range and display precision.
Although content of the present invention has been done detailed introduction through above-mentioned preferred embodiment, will be appreciated that above-mentioned description should not be considered to limitation of the present invention.After those skilled in the art have read foregoing, for multiple modification of the present invention with to substitute all will be conspicuous.Therefore, protection scope of the present invention should be limited appended claim.
Claims (6)
1. an automobile is used the DC voltage sensor, it is characterized in that, comprises that circuit connects:
Rectification module (11), the input end of described rectification module (11) links to each other with the test point of sensor (1), and its power input connects the voltage output end of automobile batteries;
Signal processing module (12), the input end of described signal processing module (12) links to each other with the voltage output end of automobile batteries;
Division module (13), the input end of described division module (13) links to each other with the voltage output end of automobile batteries, and its embedding system voltage end links to each other with the output terminal of described signal processing module (12);
Analog-to-digital conversion module (14), the input end of described analog-to-digital conversion module (14) links to each other with the output terminal of division module (13), and its power end links to each other with the output terminal of signal processing module (12), and its output terminal links to each other with the display device of outside.
2. automobile according to claim 1 is used the DC voltage sensor, it is characterized in that, described signal processing module (12) comprises that circuit connects: signal conditioning circuit (121), reduction voltage circuit (122);
The input end of described reduction voltage circuit (122) links to each other with the output terminal of signal conditioning circuit (121), and the output terminal of reduction voltage circuit (122) links to each other with the embedding system voltage end of division module (13) and the power end of analog-to-digital conversion module (14) respectively.
3. automobile according to claim 2 is used the DC voltage sensor; It is characterized in that described division module (13) comprises: the reversal connection diode (D131) and the decoupling capacitor (C131) of first divider resistance (R131) of connecting each other and second divider resistance (R132) and series connection each other; The anode of described reversal connection diode (D131) links to each other with decoupling capacitor (C131) and links to each other with the input end of analog-to-digital conversion module (14), and the negative electrode of this reversal connection diode (D131) links to each other with the output terminal of the reduction voltage circuit (122) of described signal processing module (12).
4. automobile according to claim 3 is used the DC voltage sensor; It is characterized in that; Described division module (13) also comprises: the 3rd divider resistance (R133), the two ends of described the 3rd divider resistance (R133) link to each other with the tie point of first divider resistance (R131) and second divider resistance (R132) and the anode of reversal connection diode (D131) respectively.
5. automobile according to claim 3 is used the DC voltage sensor, it is characterized in that, described first divider resistance (R131) is an adjustable resistance.
6. automobile according to claim 1 is used the DC voltage sensor; It is characterized in that; Described sensor (1) also comprises: light-coupled isolation module (15); The input end of described light-coupled isolation module (15) links to each other with the output terminal of analog-to-digital conversion module (14), and its output terminal links to each other with the display device of outside.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011102035228A CN102411083A (en) | 2011-07-11 | 2011-07-11 | Direct current voltage sensor for automobile |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011102035228A CN102411083A (en) | 2011-07-11 | 2011-07-11 | Direct current voltage sensor for automobile |
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| Publication Number | Publication Date |
|---|---|
| CN102411083A true CN102411083A (en) | 2012-04-11 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2011102035228A Pending CN102411083A (en) | 2011-07-11 | 2011-07-11 | Direct current voltage sensor for automobile |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111693755A (en) * | 2020-05-21 | 2020-09-22 | 西安交通大学 | Voltage detection circuit for high-voltage SiC MOSFET |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2814482Y (en) * | 2005-01-25 | 2006-09-06 | 扬州双鸿电子有限公司 | Intelligent monitoring power supply |
| CN201331553Y (en) * | 2008-12-22 | 2009-10-21 | 义乌市华晨机电有限公司 | DC (direct current) voltage measuring circuit with isolation |
| CN202583425U (en) * | 2011-07-11 | 2012-12-05 | 泰州市双宇电子有限公司 | Voltage sensor |
-
2011
- 2011-07-11 CN CN2011102035228A patent/CN102411083A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2814482Y (en) * | 2005-01-25 | 2006-09-06 | 扬州双鸿电子有限公司 | Intelligent monitoring power supply |
| CN201331553Y (en) * | 2008-12-22 | 2009-10-21 | 义乌市华晨机电有限公司 | DC (direct current) voltage measuring circuit with isolation |
| CN202583425U (en) * | 2011-07-11 | 2012-12-05 | 泰州市双宇电子有限公司 | Voltage sensor |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111693755A (en) * | 2020-05-21 | 2020-09-22 | 西安交通大学 | Voltage detection circuit for high-voltage SiC MOSFET |
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Address after: 225300, 98 East Spring Road, hailing Industrial Park, Jiangsu, Taizhou Applicant after: Taizhou Shuangyu Electronic Co., Ltd. Address before: 225300, 98 East Spring Road, hailing Industrial Park, Jiangsu, Taizhou Applicant before: Taizhou Hailing District Shuangyu Electronics Co.,Ltd. |
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Free format text: CORRECT: APPLICANT; FROM: TAIZHOU HAILING SHUANGYU ELECTRONICS CO., LTD. TO: TAIZHOU SHUANGYU ELECTRONICS CO., LTD. |
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Application publication date: 20120411 |