CN2398637Y - Apparatus for detecting voltage vehicle circuit and electric equipment - Google Patents

Abstract

The utility model relates to an apparatus for detecting the voltage of vehicle circuits and electric equipment, which belongs to the technical field of circuit testing devices. The utility model is characterized in that the detecting apparatus is divided into three parts, in the first part a vehicle voltage measuring circuit comprises ten light emitting diodes LED and a driver IC1 which are connected in series with a diode D1 through a voltage dividing circuit; in the second part a detecting circuit of the on/off of the vehicle circuits and the electric equipment comprises a sound display circuit and an optical display circuit, wherein, the sound display circuit is connected with a battery set E through a buzzer FM and a triode BG, and the optical display circuit is connected with the ten light emitting diodes LED and the driver IC1 through the battery set E and the voltage dividing circuit; in the second part a working lamp circuit comprises an integrated voltage stabilizing circuit IC2 which is connected in parallel with a working lamp and then connected in series with a diode D2; a lighting lamp circuit comprises the battery set E and a bulb ZD. The detecting apparatus has the advantages of simple structure and protection function, the detecting apparatus is not easy to damage, the detecting apparatus can measure the voltage and detect the on/off of the circuits and the electric equipment, and the detecting apparatus can be used as the working lamp and the lighting lamp.

Description

Automobile circuit voltage and electrical equipment detecting device

The utility model belongs to the circuit test device technical field, in particular a kind of device that automobile circuit is detected.

At present, inspection such as the break-make of automobile storage battery voltage, generator operating voltage, automobile line fault, car electrics spare and the instrument of measuring are multimeters, use but multimeter only is suitable for maintenance department, are difficult for carrying the phase with the vehicle commander, and gauge outfit is afraid of shake, frangible; Need under light, just can see clearly the pointer in the table during use; And can't hear testing result when detecting.

Reometer or charging indicator light are traditional automobile power system charge status and the indicating device that charges and discharge the electric weight size, but because it can not indicate vehicle power supply voltage more exactly, and phenomenons such as overcharge of a battery or the damage of electrical appliance superpotential take place in actual use often because of the high or low cisco unity malfunction of vehicle power supply voltage in automotive electrical element when automobile current generator voltage is lacked of proper care.

Along with China's automobile enters family, the privately owned amount of automobile will constantly increase, and there is not a kind of driver's tool in the automobile driver's tool with car and the detection vehicle power supply voltage that can carry, automobile current generator generating voltage and automobile line, automotive electrical element break-make, in a single day automobile fault occurs in the way of travelling, the driver can't go to check and repair.

The purpose of this utility model provide a kind ofly integrate the display automobile supply voltage, detect automobile circuit break-make, car electrics spare break-make and when servicing a car as the practical pocket detecting device of functions such as portable lamp.

The purpose of this utility model is achieved in that detecting device divides three parts, and first's automobile circuit voltage measurement comprises: 10 LEDs and driver IC thereof ₁Via bleeder circuit and diode D ₁Series connection; Second portion automobile line, electrical part break-make testing circuit comprise: sound display circuit and light display circuit, and wherein the sound display circuit connects electric battery E via hummer FM, triode BG; The light display circuit connects 10 light emitting diodes and driver IC via electric battery E, bleeder circuit ₁Third part portable lamp circuit comprises IC ₂Integrated stable voltage circuit is with after portable lamp GD is in parallel and diode D ₂Series connection; Lighting lamp circuit comprises electric battery E and bulb ZD.

Bleeder circuit is by voltage divider W ₁, resistance R ₄, voltage divider W ₂, resistance R ₅Form.

LED drive IC ₁Input end 5 pin meet potentiometer W ₁And R ₄End.

LED drive IC ₁9 pin sending and receiving optical diode LED ₉And IC ₁11 pin, IC ₁9 pin also can connect by sky.

LED drive IC ₁3 pin connect capacitor C ₁Positive pole, LED drive IC ₁2 pin connect capacitor C ₁Negative pole.

IC ₂2 pin and the C of integrated stable voltage circuit ₂Connect 3 pin and resistance R ₇, potentiometer W ₃Series connection back and portable lamp GD parallel connection.

Hummer FM resistance in series R ₁The back joins with triode BG collector, and the emitter of triode BG connects K switch ₂-2 get back to electric battery E, and the base stage of triode connects K switch ₁-2, resistance R ₂

Good effect of the present utility model is: automobile can be made voltage table in motion and use, at any time monitor the charging voltage of automobile current generator operating voltage and storage battery, can substitute the vehicle current table, at any time check automobile storage battery voltage, the positive and negative electrode binding post of difference storage battery is selected to detect automobile line and electrical part break-make with sound, two kinds of indications of light, is the illuminating lamp of being convenient to carry, also can be in the dark or the lamp usefulness of working during the night repair automobile, power supply voltage range is wide to be 8.5 volts-18 volts of direct currents.

Below in conjunction with accompanying drawing the utility model is described in detail.

Accompanying drawing is a circuit diagram of the present utility model.

Referring to accompanying drawing, circuit of the present utility model divides three parts, first's automobile circuit tension measuring circuit, second portion automobile line, electrical part break-make testing circuit, third part portable lamp circuit and lighting lamp circuit.The positive pole of detecting device is connected to Gear-shift switch K ₁(K ₁-1, K ₁-2) work as K ₁Placing at 2 o'clock is the automobile tension measuring circuit, when direct current 10.5-15 volt voltage is connected at two ends, and the core component IC of detecting device ₁Wherein conducting that integrated circuit directly drives in 10 LEDs on pin 1 or the pin 10-pin 18 is luminous.Every LED shows that the different dc voltage values in predefined 10.5 volts of-15 volts of scopes are measured magnitude of voltage.Every LED is represented the transition of 0.5 volt of voltage difference.IC ₁The pin 3 of integrated circuit and pin 2 are respectively the positive and negative extreme of power supply, this IC circuit ₁Voltage source is provided for 10.5 volts-15 volts by tested power supply; IC ₁The pin 4 of integrated circuit and pin 6 are potential dividers that IC interior+level drives comparer, are IC ₁Integrated circuit+level drives comparer provides reference voltage source.IC ₁Pin 7 and pin 8 through W ₂And resistance R ₅Be set to 2.4 volts-3.6 volts basic range scope, i.e. IC ₁Pin 6 and the reference voltage of pin 4 built-in potential voltage dividers.IC ₁Pin 5 be the input end of integrated circuit, its inner IC that connects ₁+ the level driver, carry out voltage ratio with the built-in potential voltage divider, pin 5 is by volta potential voltage divider W ₁And R ₄After from tested voltage (10.5 volts-15 volts), obtaining comparative voltage, send into IC ₁Inside carry out voltage ratio, and pass through IC ₁9 pin make integrated circuit output be set at a demonstration, and make+which rank of LED the conducting of level driver light.W ₁And R ₄With W ₂And R ₅Be to set IC ₁Integrated circuit input voltage is 10.5 volts-15 volts and measures the divider resistance of basic range voltage range and the setting resistance of internal reference voltage, R ₅Simultaneously be again setting resistance, make IC output current ₁Output terminal and LED between need not add current-limiting resistance.IC ₁The pin 9 of integrated circuit is an integrated circuit output point display setting, connects with pin 11.Capacitor C ₂Be used for filtering to improve the stability of circuit, diode D ₁Be reverse connecting protection.

Work as K switch ₁Place sound, light (position 1 or 2) indicating positions shelves, press K switch simultaneously ₂(K ₂-1, K ₂-2, K ₂-3, K ₂-4, when K switch 2 is pressed, detected material can not have voltage), red, black two detecting pens of detecting device contact the two ends of detected automobile line or car electrics spare respectively, have sound to send when detected circuit position or break-over of device or demonstration is lighted in the LED conducting.

The sound indication is that hummer FM sends by the collector amplification of transistor BG, represents detected position or break-over of device, measurement range 0-4K Ω.If surpassing this scope or open circuit, the measured device resistance then do not have sound to send.

LED is through IC by bright conducting ₁Integrated circuit realizes that every LED shows different Standard resistance ranges, here IC ₁The reference voltage of the pin 6 of integrated circuit and pin 4 inner voltage dividers is about 1.25 volts, by IC ₁The pin 7 and the pin 8 of integrated circuit directly provide.IC ₁Pin 5 from 3 volts of direct supply E through R ₃, R ₄Back in parallel obtains outside voltage divider voltage with connecting of test line or device, and because of the resistance difference of test line or device, the input voltage that pin 5 is obtained is also different, so IC ₁Integrated circuit is obtained different input voltages and is compared on pin 5, the conducting driver makes different LEDs light demonstration measured device break-make, and promptly obtaining by predefined each resistance is about resistance of detected position or device.Measurement range 0-800 Ω.If surpass this resistance available sounds shelves test,, prove herein for opening circuit if also there is not sound.Work as IC ₁5 pin of integrated circuit do not have the voltage input, and LED then can not be switched on and light, and then measured device is for opening circuit.

Work as K switch ₁Placed 1 o'clock, portable lamp is started working, and the input voltage of portable lamp part is 8.5 volts-18 volts of direct currents, in this voltage range, and IC ₂Output voltage be fixing 2.18 volts, i.e. the operating voltage of bulb.If (IC ₂When enough heat radiator are arranged, can be with R ₆Resistance removes, and the operating voltage of this portable lamp is can both operate as normal between 6 volts-40 volts of the direct currents.) portable lamp can not damage or influence normally luminous because of the height of battery voltage or generator for electricity generation voltage changes.Capacitor C ₂Will be near IC ₂Connect IC ₂Must radiation fin.

Illuminating lamp is with No. 5 powered battery of 2 joints, with K switch ₁Place 3 to get final product.Other has and lights K switch ₃, when pressing K ₃The time, illuminating lamp is luminous, and illuminating lamp and portable lamp can be lighted simultaneously, increase lamplight brightness.Illuminating lamp also can use separately, is not subjected to power limitations, diode D ₂Be reverse connecting protection.

The emitter of triode BG connects K switch ₂-2 get back to electric battery E, and the base stage of triode connects K switch ₁-2, resistance R ₂

Diode D ₁And D ₂Also have concurrently simultaneously and prevent that voltage table and portable lamp from forming the loop and causing damage IC when using ₁Or IC ₂Deng element.

IC ₁: LM3914 integrated circuit point-like/strip driver.

IC ₂: the adjustable voltage stabilizer of integrated three ends of LM317.

Claims (7)

1, automobile circuit voltage and electrical equipment detecting device, it is characterized in that: detecting device divides three parts, and first's automobile tension measuring circuit comprises: 10 LEDs and driver IC thereof ₁Via bleeder circuit and diode D ₁Series connection; Second portion automobile line, electrical part break-make testing circuit comprise: sound display circuit and light display circuit, and wherein the sound display circuit connects electric battery E via hummer FM, triode BG; The light display circuit connects 10 light emitting diodes and driver IC thereof via electric battery E, bleeder circuit ₁Third part portable lamp circuit comprises IC ₂After integrated stable voltage circuit and the portable lamp GD parallel connection with diode D ₂Series connection; Lighting lamp circuit comprises electric battery E and bulb ZD.

2, by the described detecting device of claim 1, it is characterized in that: bleeder circuit is by voltage divider W ₁, resistance R ₄, voltage divider W ₂, resistance R ₅Form.

3, by the described detecting device of claim 1, it is characterized in that: described LED drive IC ₁Input end 5 pin meet potentiometer W ₁And R ₄

4, by the described detecting device of claim 1, it is characterized in that: described LED drive IC ₁9 pin sending and receiving optical diode LED ₉And IC ₁11 pin, IC ₁9 pin also can connect by sky.

5, by the described detecting device of claim 1, it is characterized in that: LED drive IC ₁3 pin connect capacitor C ₁Positive pole, LED drive IC ₁2 pin connect capacitor C ₁Negative pole.

6, by the described detecting device of claim 1, it is characterized in that: IC ₂2 pin and the C of integrated stable voltage circuit ₂Connect 3 pin and resistance R ₇, potentiometer W ₃Series connection back and portable lamp GD parallel connection.

7, by the described detecting device of claim 1, it is characterized in that: described hummer FM resistance in series R ₁The back joins with triode BG collector, the emitter of triode BG connects K switch ₂-2 get back to electric battery E, and the base stage of triode connects K switch ₁-2, resistance R ₂