CN2229087Y - Automotive circuit tester - Google Patents
Automotive circuit tester Download PDFInfo
- Publication number
- CN2229087Y CN2229087Y CN 94242692 CN94242692U CN2229087Y CN 2229087 Y CN2229087 Y CN 2229087Y CN 94242692 CN94242692 CN 94242692 CN 94242692 U CN94242692 U CN 94242692U CN 2229087 Y CN2229087 Y CN 2229087Y
- Authority
- CN
- China
- Prior art keywords
- circuit
- led
- resistance
- bridge rectifier
- voltage
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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- Testing Electric Properties And Detecting Electric Faults (AREA)
Abstract
The utility model relates to an automotive circuit tester, which is a small test device in a portable type that can be used for testing circuit faults of an automobile and testing the electric quantity of an accumulator cell. The utility model is mainly composed of a signal input circuit, a sample circuit, a voltage comparing circuit and an indicator, wherein, the signal input circuit is assembled into a polarity inversion circuit by a bridge rectifier, an input terminal of the signal input circuit is connected with a probe, and an output terminal is connected with the sample circuit and the voltage comparing circuit. The indicator is composed of light emitting diodes LED 1, LED 2 and LED 3 which are respectively connected with the output terminals of the IC 1, the IC 2 and the IC 3 in voltage comparison. A buzzer is connected with the R 1 and R 2 of the sample circuit in parallel at two output terminals of a bridge rectifier. Thus, the automotive circuit tester is formed.
Description
The utility model is a kind of pick-up unit of automobile circuit, belong to the vehicle maintenance apparatus technology,
The quantity of automobile grows with each passing day, what develop is very fast, thing followed vehicle failure is also corresponding is on the increase, wherein the fault of circuit aspect is exactly common a kind of, its interrupt line, loose contact, storage battery short of electricity are again modal class faults in the fault, usually people are when this type of fault of maintenance, mainly be to carry out fault diagnosis by multimeter or other testing apparatus, detect automobile circuit with this kind equipment, generally cumbersome, carry also inconvenience, especially whether storage battery is had electricity, has how many electricity to know.
Goal of the invention of the present utility model just provides a kind ofly both can measure the storage battery electric weight, but metering circuit opens circuit or the automobile circuit detecting device of loose contact again.
Automobile circuit detecting device of the present utility model is mainly by signal input circuit (1), sample circuit (2), and voltage ratio is (3), and indicator (4) is formed, and wherein, signal input circuit (1) comprises pop one's head in P1 and bridge rectifier ZL1, and sample circuit (2) comprises resistance R
1, R
2, voltage ratio (3) comprises operational amplifier IC
1, IC
2, IC
3With adjustable resistance RW
1, RW
2, RW
3, indicator (4) comprises LED
1, LED
2, LED
3And resistance R
4, R
5, R
6And news Chinese percussion instrument " FMQ ", in input circuit (1), the input end of bridge rectifier " ZL1 " directly is connected with probe P1, and its output terminal passes through resistance R
3Direct and the back step voltage relatively power end of (3) is connected, simultaneously the resistance R in the sample circuit (2)
1, R
2Be attempted by after being in series on two output terminals of bridge rectifier " ZL1 ".In resistance R
1And R
2The contact place draw a signal wire, respectively with the voltage ratio IC in (3)
1, IC
2, IC
3Inverting input be connected; LED in the indicating circuit (4)
1, LED
2, LED
2, directly be connected on (3) middle IC of voltage ratio respectively
1, IC
2, IC
3Output terminal.
Principle of work of the present utility model is: probe P1 touches test point, and its signal is after the reversal of bridge rectifier " ZL1 ", and electric current is through resistance R
3, the mu balanced circuit that stabilivolt DW forms is to by RW
1, RW
2, RW
3The potential circuit power supply of forming of adjusting, three groups of voltages are regulated in test, make it with accumulator electric-quantity " abundance ", " available ", " deficiency " three condition under voltage corresponding one by one, by resistance R
1And R
2Form and measure sample circuit, will be by R
1And R
2Between the voltage signal that takes out export the negative terminal of three operational amplifiers to, when the voltage of sampling spot is higher than when adjusting voltage, this transport and placing device output low level, electric current is through the current-limiting resistance R LED luminotron of flowing through, make it luminous, when accumulator electric-quantity " abundance ", voltage is the highest, and three LED light are all luminous; In like manner, during accumulator electric-quantity " available ", its sampling voltage is lower than IC
3The voltage of adjusting of input end is greater than IC
2, IC
1The voltage of adjusting, so LED
1, LED
2Luminous; When accumulator electric-quantity was not enough, its sampling voltage was lower than IC
2, IC
2The voltage of adjusting, so LED
1Luminous, LED
2, LED
3Not luminous; During main storage battery electric weight wretched insufficiency, sampling voltage is less than the adjust voltage of three voltage ratios than input end, so three LED are all not luminous; When the metering circuit situation,, then show the problem that loose contact is arranged in one section few circuit of the bright number of LEI when the two ends at same route record the bright number of the luminotron of this detecting device not simultaneously.
Adopt automobile circuit detecting device of the present utility model, its advantage is the situation that this detecting device not only can metering circuit, but also can measure the electric weight of accumulator.This detector circuit is simple, and cost is low, and volume is little, and is very easy to use, and in addition, the power supply power supply specially of this detecting device directly utilizes measured signal that electric current is provided, and therefore not only makes circuit further simple, and has further reduced cost.
Fig. 1 is a circuit structure block diagram of the present utility model.
Fig. 2 is circuit theory diagrams of the present utility model.
Signal input circuit (1) is made up of bridge rectifier circuit and probe, and probe P1 is connected on the input end of bridge rectifier " ZL1 ", and its output terminal passes through by resistance R
3With IC
1, IC
2, IC
3Power end be connected the resistance R in the sample circuit
1With R
2Resistance equates, after being in series, be attempted by on two output terminals of bridge rectifier, in addition, at two output terminals of bridge rectifier, go back and be connected to news Chinese percussion instrument " FMQ ", this news Chinese percussion instrument adopts the piezoelectric ceramics squealer, when metering circuit,, whether be communicated with this circuit of prompting people as long as circuit has the telecommunication Chinese percussion instrument just can send the sound.Voltage ratio is than the IC in (3)
1, IC
2, IC
3Adopt an integrated circuit " LM3
24", IC wherein
1, IC
2, IC
3In-phase input end meet variable resistor RW respectively
1, RW
2, RW
3Adjustable end, its inverting input respectively with resistance R
1, R
2Mid point be connected.LED in the indicator (4)
1, LED
2, LED
3Respectively with resistance R
4, R
5, R
6Be in series and be connected on IC respectively
1, IC
2, IC
3Output terminal and the output terminal of " ZL1 " between.According to the above, it is assembled in the box of a matchbox size, probe is drawn, so just can form automobile circuit detecting device of the present utility model.
Claims (4)
1, a kind of pick-up unit of automobile circuit, formed by signal input circuit and signal processing circuit, it is characterized in that this detecting device comprises signal input circuit (1), sample circuit (2), voltage ratio is (3), the input end of bridge rectifier " ZL1 " directly is connected with probe P1 in the indicator (4), input circuit (1), and its output terminal passes through resistance R
3Direct and the back step voltage relatively power end of (3) is connected, simultaneously the resistance R in the sample circuit (2)
1, R
2Be attempted by after being in series on two ends of exporting of bridge rectifier " ZL1 ".
2, automobile circuit detecting device according to claim 1 is characterized in that sample resistance R in the sample circuit (2)
1With R
2Resistance equate.
3, automobile circuit detecting device according to claim 1 and 2 is characterized in that also directly being connected to news Chinese percussion instrument " FMQ " between two output terminals of bridge rectifier " ZL1 ".
4, automobile circuit detecting device according to claim 1 and 2 is characterized in that voltage ratio is than the IC in (3)
1, IC
2, IC
3Adopt integrated voltage comparator, its output terminal directly respectively with the LED of indicator (4)
1, LED
2, LED
3Be connected.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 94242692 CN2229087Y (en) | 1994-10-12 | 1994-10-12 | Automotive circuit tester |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 94242692 CN2229087Y (en) | 1994-10-12 | 1994-10-12 | Automotive circuit tester |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2229087Y true CN2229087Y (en) | 1996-06-12 |
Family
ID=33849234
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 94242692 Expired - Fee Related CN2229087Y (en) | 1994-10-12 | 1994-10-12 | Automotive circuit tester |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2229087Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101938685A (en) * | 2010-04-20 | 2011-01-05 | 惠州市德赛西威汽车电子有限公司 | Automatic diagnosis method of automobile sound loudspeaker and antenna |
| CN102346215A (en) * | 2011-10-10 | 2012-02-08 | 黄宇嵩 | Low-voltage alarm circuit with general battery pack |
| CN103364726A (en) * | 2012-03-29 | 2013-10-23 | 海洋王照明科技股份有限公司 | Battery discharge monitoring device |
-
1994
- 1994-10-12 CN CN 94242692 patent/CN2229087Y/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101938685A (en) * | 2010-04-20 | 2011-01-05 | 惠州市德赛西威汽车电子有限公司 | Automatic diagnosis method of automobile sound loudspeaker and antenna |
| CN101938685B (en) * | 2010-04-20 | 2013-05-22 | 惠州市德赛西威汽车电子有限公司 | Automatic diagnosis method of automobile sound loudspeaker and antenna |
| CN102346215A (en) * | 2011-10-10 | 2012-02-08 | 黄宇嵩 | Low-voltage alarm circuit with general battery pack |
| CN103364726A (en) * | 2012-03-29 | 2013-10-23 | 海洋王照明科技股份有限公司 | Battery discharge monitoring device |
| CN103364726B (en) * | 2012-03-29 | 2017-06-27 | 海洋王照明科技股份有限公司 | A kind of battery discharge monitoring device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |