CN206114744U - Test pencil and test circuit thereof - Google Patents
Test pencil and test circuit thereof Download PDFInfo
- Publication number
- CN206114744U CN206114744U CN201620890575.XU CN201620890575U CN206114744U CN 206114744 U CN206114744 U CN 206114744U CN 201620890575 U CN201620890575 U CN 201620890575U CN 206114744 U CN206114744 U CN 206114744U
- Authority
- CN
- China
- Prior art keywords
- resistance
- diode
- led
- earth electrode
- probe
- 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.)
- Active
Links
Landscapes
- Measurement Of Current Or Voltage (AREA)
Abstract
The utility model relates to a test pencil and test circuit thereof. This test pencil is including handwriting, test needle, luminotron, electric wire and alligator clip, the setting of test needle is in the one end of handwriting, the luminotron sets up in the other end of handwriting, the alligator clip passes through the electric wire and is connected with the handwriting, the inside detection circuitry that is equipped with of handwriting. Compare in prior art the utility model discloses a test needle can carry out the detection of multiple functions, including the return circuit whether switch on, electric pressure and positive pulse and burden pulse voltage's measurement etc.. Use portably, need not to shift. It is convenient that the test electrography uses, judge fast, can judge whether being opened circuit in the circuit in the test point, return circuit or have voltage, state that short circuit, positive pulse, negative pulse or dolly battery are charged. And can, the test be full of the battery in self handwriting in going on.
Description
Technical field
The utility model is related to a kind of voltage test pencil, particularly a kind of voltage test pencil that can possess various test functions；This reality
A kind of test circuit for voltage test pencil is additionally provided with new.
Background technology
Voltage test pencil is also test pencil, referred to as " electroprobe ".A kind of electrician tool, for testing electric wire in it is whether powered.And
In the application of existing voltage test pencil, the detection of the battery of automobile is also usually applied to.
Fig. 1 is referred to, it is the structural representation of the voltage test pencil of prior art.Existing voltage test pencil includes：Testing needle 1a,
Penholder 2a, bulb 3a, spring 4a, wire 5a and crocodile clip 6a.The bulb 3a is arranged on the inside of penholder 2a, the testing needle
1a is arranged on the end of penholder 2a, and one end of the testing needle is arranged on inside penholder, and by the spring 4a and penholder
Side one end connects.The crocodile clip 6a is connected by the wire 5a with penholder inside.
Voltage test pencil in prior art one is easy to use, but can only test electricity and do not have an electricity, single function, using short to circuit
Road performance is strong, the intelligent height of present dolly.Easily to dolly just into false failure with to computer in dolly with regard to into eternal hard defects.
For the defect in prior art one, prior art two provides a kind of multipurpose test system.Please refer to
Fig. 2, it is the structural representation of the test device in prior art two.Test device in prior art two is provided with multiple shelves
Position, can realize different test functions by adjusting different gears.Although the multipurpose test system tool in prior art two
Standby sensitive height, high impedance, the low advantage of short-circuit.
But following technological deficiency is yet suffered from prior art two：Its anti-interference low, volume is big, inconvenient operation,
Constantly to switch gear surely, and need to use using testing needle by both hands simultaneously, as extremely inconvenient using universal meter.
Utility model content
The utility model is the shortcoming and deficiency for overcoming prior art, there is provided a kind of Multifunction screw-driver with voltage tester simple to operate
And its test circuit.
The utility model is realized by following technical scheme：A kind of detection circuit of voltage test pencil, including power supply, connect
Ground electrode, probe and loop detection module；The loop detection module includes：First resistor, second resistance, the 4th resistance,
One LED, the second LED, the 6th diode and the 7th diode；
The positive pole of the power supply by with probe be connected, while passing sequentially through first resistor, the first LED, the 4th resistance
It is connected with earth electrode；Positive pole one end of first LED is connected with the positive pole of power supply, and first LED negative pole one end passes through
4th resistance is connected with earth electrode；
The negative pole of the power supply passes sequentially through second resistance, the second LED, the 4th resistance and is connected with earth electrode；It is described
Negative pole one end of second LED is connected with the negative pole of power supply, and second LED positive pole one end is connected by the 4th resistance with earth electrode
Connect；
The negative pole of the power supply also passes sequentially through the 6th diode, the 4th resistance and is connected with earth electrode simultaneously；Described
Positive pole one end of six diodes is connected with the negative pole of power supply, and negative pole one end of the 6th diode is by the 4th resistance and earth electrode
Connection；
The positive pole of the 7th diode is connected with the 4th resistance, and negative pole is connected with the probe.
Compared to prior art, circuit of the present utility model can be made whether the test in loop.Do not have when the external world is accessed
During electric loading, by the positive pole of power supply, probe, load, the 4th resistance and the second LED, loop is formed.By whether lighting
Two LEDs judge whether loop turns on.Meanwhile, test circuit of the present utility model can be also used for carrying out the positive pulse in loop and survey
Examination.When test has loading band negative pulse in normal circuit, then the 2nd LED can be often lighted in test circuit.When having
Electric current finally flows back to load in probe, first resistor, a LED, the 4th resistance during positive pulse, forms path, now also lights
First LED.By judging whether the first LED is lighted so as to determine whether that positive pulse is loaded.
Used as further improvement of the utility model, the loop detection module also includes the first diode, the two or two pole
Pipe, the 3rd diode, the 4th diode, the 5th diode, rectifier bridge, the 3rd LED and 3rd resistor；
Negative pole and just in first diode, the second diode, the 3rd diode, the 4th diode and the 5th diode
Pole is sequentially connected, wherein, the positive pole of first diode is connected with the positive pole and probe of power supply simultaneously；5th diode
Negative pole be connected with earth electrode by the 4th resistance；
The rectifier bridge has two exchange ends and two DC terminals；In described two exchange ends, one end and the 5th diode
Negative pole connection, the other end by 3rd resistor be grounded；In described two DC terminals, output one end by the 3rd LED with it is defeated
Enter end connection.
Further, when positive pulse or voltage are higher than 9.5V, pulse or current direction its cells.Work as supply voltage simultaneously
During higher than 2.5V, electric current is through the first diode, the second diode, the 3rd diode, the 4th diode, the 5th diode, group
Into bias current voltage stabilizing, the 6th diode, the 4th resistance, and return to earth electrode.After the 4th resistive voltage is drawn high, bias current is to rectification
Bridge, the 3rd LED is lighted, and earth electrode is returned to by 3rd resistor.
Used as further improvement of the utility model, the loop detection module also includes the first triode, the 4th LED
Lamp, the 5th resistance, the 6th resistance, the 9th resistance and the second Zener diode；
The emitter-base bandgap grading of first triode is connected with probe, the colelctor electrode of the first triode pass sequentially through the 4th LED etc., the
Five resistance are connected with earth electrode, and the base stage of the first triode passes sequentially through the 6th resistance and the second Zener diode with ground connection electricity
Pole connects；
Described 9th resistance one end is connected with the probe, and the other end is connected with second Zener diode.
Further, when positive pulse or voltage are higher than 9.5V, make the first triode ON, electric current through the 4th LED, the
Five resistance, the 6th resistance, the 9th resistance and the second Zener diode, into earth electrode.
Used as further improvement of the utility model, the loop detection module also includes the second triode, the 5th LED
Lamp, the first Zener diode, the 8th diode, the 7th resistance and the 8th resistance；
The emitter-base bandgap grading of second triode be connected with probe, and the colelctor electrode of the second triode passes through the 5th LED, the 5th electric
Resistance is connected with earth electrode；The base stage of second triode passes sequentially through the 7th resistance, the first Zener diode, the eight or two pole
Pipe and the second Zener diode are connected with earth electrode；
One end of 8th resistance is connected with the probe, and the other end is connected with first Zener diode.
Further, when positive pulse voltage is higher than 13.5V, make the second triode ON, electric current through the 5th LED, the
Five resistance, the 6th resistance, the 7th resistance, the 8th resistance, the 9th resistance, the 8th diode, the first Zener diode, the second voltage stabilizing
Diode, eventually passes back to earth electrode.
Used as further improvement of the utility model, the loop detection module also includes accompanying voltage rectifier；It is described to accompany
Voltage rectifier includes the tenth resistance, the 6th LED, the first electric capacity, the 11st resistance and the 3rd Zener diode；
The probe passes sequentially through the tenth resistance, the 6th LED, the first electric capacity, the 11st resistance and is connected with earth electrode；
The positive pole and the first capacitance connection of the 3rd Zener diode, negative pole is connected with probe.
Further, when each pulse voltage is passed through, the 6th LED can all be lighted.Pulse is judged by the 6th LED
Whether voltage passes through.
The utility model additionally provides a kind of voltage test pencil, and it includes handwriting, testing needle, luminous tube, electric wire and crocodile clip；Institute
One end that testing needle is arranged on handwriting is stated, the luminous tube is arranged in the other end of handwriting；The crocodile clip by electric wire with
Handwriting connects；Detection circuit is provided with inside the handwriting；
The detection circuit includes power supply, earth electrode, probe and loop detection module；The loop detection module bag
Include：First resistor, second resistance, the 4th resistance, the first LED, the second LED, the 6th diode and the 7th diode；
The positive pole of the power supply by with probe be connected, while passing sequentially through first resistor, the first LED, the 4th resistance
It is connected with earth electrode；Positive pole one end of first LED is connected with the positive pole of power supply, and first LED negative pole one end passes through
4th resistance is connected with earth electrode；
The negative pole of the power supply passes sequentially through second resistance, the second LED, the 4th resistance and is connected with earth electrode；It is described
Positive pole one end of second LED is connected with the negative pole of power supply, and second LED negative pole one end is connected by the 4th resistance with earth electrode
Connect；
The negative pole of the power supply also passes sequentially through the 6th diode, the 4th resistance and is connected with earth electrode simultaneously；Described
Positive pole one end of six diodes is connected with the negative pole of power supply, and negative pole one end of the 6th diode is by the 4th resistance and earth electrode
Connection；
The positive pole of the 7th diode is connected with the 4th resistance, and negative pole is connected with the probe.
Used as further improvement of the utility model, the loop detection module also includes the first diode, the two or two pole
Pipe, the 3rd diode, the 4th diode, the 5th diode, rectifier bridge, the 3rd LED and 3rd resistor；
Negative pole and just in first diode, the second diode, the 3rd diode, the 4th diode and the 5th diode
Pole is sequentially connected, wherein, the positive pole of first diode is connected with the positive pole and probe of power supply simultaneously；5th diode
Negative pole be connected with earth electrode by the 4th resistance；
The rectifier bridge has two exchange ends and two DC terminals；In described two exchange ends, one end and the 5th diode
Negative pole connection, the other end by 3rd resistor be grounded；In described two DC terminals, output one end by the 3rd LED with it is defeated
Enter end connection.
Used as further improvement of the utility model, the loop detection module also includes the first triode, the 4th LED
Lamp, the 5th resistance, the 6th resistance, the 9th resistance and the second Zener diode；
The emitter-base bandgap grading of first triode is connected with probe, the colelctor electrode of the first triode pass sequentially through the 4th LED etc., the
Five resistance are connected with earth electrode, and the base stage of the first triode passes sequentially through the 6th resistance and the second Zener diode with ground connection electricity
Pole connects；
Described 9th resistance one end is connected with the probe, and the other end is connected with second Zener diode.
Used as further improvement of the utility model, the loop detection module also includes the second triode, the 5th LED
Lamp, the first Zener diode, the 8th diode, the 7th resistance and the 8th resistance；
The emitter-base bandgap grading of second triode be connected with probe, and the colelctor electrode of the second triode passes through the 5th LED, the 5th electric
Resistance is connected with earth electrode；The base stage of second triode passes sequentially through the 7th resistance, the first Zener diode, the eight or two pole
Pipe and the second Zener diode are connected with earth electrode；
One end of 8th resistance is connected with the probe, and the other end is connected with first Zener diode.
Used as further improvement of the utility model, the loop detection module also includes accompanying voltage rectifier；It is described to accompany
Voltage rectifier includes the tenth resistance, the 6th LED, the first electric capacity, the 11st resistance and the 3rd Zener diode；
The probe passes sequentially through the tenth resistance, the 6th LED, the first electric capacity, the 11st resistance and is connected with earth electrode；
The positive pole and the first capacitance connection of the 3rd Zener diode, negative pole is connected with probe.
In sum, the utility model can carry out the detection of several functions by testing needle, including whether loop leads
Measurement of logical, electric pressure and positive pulse and negative pulse voltage etc..It is easy to use, without the need for being shifted gears.Test electroprobe is used
It is convenient to get up, and judges in tested pilot that is fast, can interpolate that in circuit either with or without open circuit, loop or has voltage, short-circuit, positive arteries and veins
The state that punching, negative pulse or dolly battery are electrically charged.And the battery that can be full of in test is carried out in itself handwriting.
In order to more fully understand and implement, the utility model is described in detail below in conjunction with the accompanying drawings.
Description of the drawings
Fig. 1 is the structural representation of the voltage test pencil of prior art one.
Fig. 2 is the structural representation of the detection means of prior art two.
Fig. 3 is the structural representation of the voltage test pencil of the present invention.
Fig. 4 is the circuit diagram of the test circuit of the present invention.
Specific embodiment
In in order to solve prior art when various tests are carried out, need to carry out gear shift operation, make user operationally not
Just technological deficiency, the utility model provides a kind of voltage test pencil easy to operate, and the test circuit inside the voltage test pencil.
It is introduced below by way of specific embodiment.
The utility model provides a kind of voltage test pencil, and it includes handwriting 1, testing needle 2, luminous tube 3, electric wire 4 and crocodile clip
5.The testing needle 2 is arranged on one end of handwriting 1, and the luminous tube 3 is arranged in the other end of handwriting.The crocodile clip 5 leads to
Cross electric wire 4 to be connected with handwriting 1.Detection circuit is provided with inside the handwriting 1.Test pen simple structure in the utility model, leads to
Cross the detection that testing needle can be carried out loading.And for load detect when, mainly by internal detection circuit come real
It is existing.The principle of detection circuit of the present utility model is described in detail below.
Please refer to Fig. 4, it is the circuit diagram of detection circuit of the present utility model.It is described detection circuit include power supply,
Earth electrode B, probe A and loop detection module.The loop detection module includes：First resistor R1, second resistance R2, the 4th
Resistance R4, the first LED, the second LED, the 6th diode D6 and the 7th diode D7；
The positive pole of the power supply with probe A by being connected, while passing sequentially through first resistor R1, the first LED, the 4th electric
Resistance R4 is connected with earth electrode B.Positive pole one end of first LED is connected with the positive pole of power supply, first LED negative pole one end
It is connected with earth electrode B by the 4th resistance R4.
The negative pole of the power supply passes sequentially through second resistance R2, the second LED, the 4th resistance R4 and is connected with earth electrode；
Positive pole one end of second LED is connected with the negative pole of power supply, and second LED negative pole one end is by the 4th resistance R4 and ground connection
Electrode connects.
The negative pole of the power supply also passes sequentially through the 6th diode D6, the 4th resistance R4 and is connected with earth electrode simultaneously；Institute
The positive pole one end for stating the 6th diode D6 is connected with the negative pole of power supply, and negative pole one end of the 6th diode D6 passes through the 4th resistance R4
It is connected with earth electrode.
The positive pole of the 7th diode D7 is connected with the 4th resistance R4, and negative pole is connected with the probe A.
Circuit of the present utility model can be made whether the test in loop.When the access external world there is not electric loading, by electricity
The positive pole in source, probe A, load, the 4th resistance R4 and the second LED, form loop.By whether lighting the judgement of the second LED
Whether loop turns on.Meanwhile, test circuit of the present utility model can be also used for carrying out the positive pulse test in loop.Test is just
When having loading band positive pulse in normal circuit, then the 2nd LED can be often lighted in test circuit.The electric current when there is positive pulse
In probe A, first resistor R1, a LED, the 4th resistance R4, load is finally flowed back to, form path, now also lighted first
LED.By judging whether the first LED is lighted so as to determine whether that positive pulse is loaded.Specifically, in the present embodiment,
First LED is green light, and second LED is red light.
Used as the preferred embodiment of the present embodiment, the loop detection module also includes the first diode D1, the second diode
D2, the 3rd diode D3, the 4th diode D4, the 5th diode D5, rectifier bridge MB6S, the 3rd LED and 3rd resistor R3.
The first diode D1, the second diode D2, the 3rd diode D3, the 4th diode D4 and the 5th diode D5
Middle negative pole and positive pole are sequentially connected.Wherein, the positive pole of the first diode D1 is connected with the positive pole and probe A of power supply simultaneously.
The negative pole of the 5th diode D5 is connected by the 4th resistance R4 with earth electrode B.
The rectifier bridge MB6S has two exchange ends and two DC terminals.In described two exchange ends, one end and the five or two
The negative pole connection of pole pipe D5, the other end is grounded by 3rd resistor R3；In described two DC terminals, output one end passes through the 3rd
LED is connected with input.
By the improvement of foregoing circuit, when positive pulse voltage is higher than 10V, pulse current flows to its cells.Work as simultaneously
When supply voltage is higher than 2.5V, electric current is through the first diode D1, the second diode D2, the 3rd diode D3, the 4th diode
D4, the 5th diode D5, the 6th diode D6, the 4th resistance R4, and return to earth electrode B.When the voltage of the 4th resistance R4 draws
Gao Hou, bias current to rectifier bridge, lights the 3rd LED, and returns to earth electrode B by 3rd resistor.Specifically, in the present embodiment
In, the 3rd LED is blue lamp.
As further preferred embodiment in the present embodiment, the loop detection module also include the first triode Q1,
4th LED, the 5th resistance R5, the 6th resistance R6, the 9th resistance R9 and the second Zener diode Z2.
The emitter-base bandgap grading of the first triode Q1 is connected with probe A, and the colelctor electrode of the first triode Q1 passes sequentially through the 4th LED
It is connected with earth electrode B Deng, the 5th resistance R5, the base stage of the first triode Q1 passes sequentially through the 6th resistance R6 and the second voltage stabilizing two
Pole pipe Z2 is connected with earth electrode B.
Described 9th resistance R9 one end is connected with the probe A, and the other end is connected with the second Zener diode Z2.
By the Optimal improvements of foregoing circuit, when positive pulse or voltage are higher than 9.5V, turn on the first triode Q1, electricity
Stream is electric into ground connection through the 4th LED, the 5th resistance R5, the 6th resistance R6, the 9th resistance R9 and the second Zener diode Z2
Pole B.Whether lighted by the 4th LED, such that it is able to judge voltage whether more than 10V.In the present embodiment, the described 4th
LED is green light.
Used as the further optimal enforcement mode of the present embodiment, the loop detection module also includes the second triode
Q2, the 5th LED, the first Zener diode Z1, the 8th diode D8, the 7th resistance R7 and the 8th resistance R8.
The emitter-base bandgap grading of the second triode Q2 is connected with probe A, the colelctor electrode of the second triode Q2 by the 5th LED,
5th resistance R5 is connected with earth electrode B；The base stage of the second triode Q2 passes sequentially through the 7th resistance R7, the first voltage stabilizing two
Pole pipe Z1, the 8th diode D8 and the second Zener diode Z1 are connected with earth electrode B.
One end of the 8th resistance R8 is connected with the probe A, and the other end is connected with the first Zener diode Z1.
By the further improvement of above-mentioned detection circuit, when positive pulse or voltage are higher than 13.5V, the second triode Q2 is made
Conducting, electric current is through the 5th LED, the 5th resistance R5, the 6th resistance R6, the 7th resistance R7, the 8th resistance R8, the 9th resistance
R9, the 8th diode D8, the first Zener diode Z1, the second Zener diode Z2, eventually pass back to earth electrode B.By judging
Whether whether the 5th LED is lighted, so as to judge the load voltage more than 13.5V.In the present embodiment, the 5th LED
For red light.In the present embodiment, the 4th LED4, the 5th LED5 are a three pin common cathode double color luminotrons, when voltage is higher than
9.5V light green light, higher than 13.5V when, green light puts out Destroy and is changed into red colored lamp.
Used as the further optimal enforcement mode of the present embodiment, the loop detection module also includes accompanying voltage rectifier.
It is described to accompany voltage rectifier to include the tenth resistance R10, the 6th LED, the first electric capacity C1, the 11st resistance R11 and the 3rd voltage stabilizing
Diode Z3.
The probe A passes sequentially through the tenth resistance R10, the 6th LED, the first electric capacity C1, the 11st resistance R11 with ground connection
Electrode B connects；The positive pole of the 3rd Zener diode Z3 is connected with the first electric capacity C1, and negative pole is connected with probe A.
By the further improvement to above-mentioned detection circuit, when each pulse voltage is passed through, the 6th LED can be all lighted
Lamp.Judge whether pulse voltage passes through by the 6th LED.In the present embodiment, the 6th LED is amber light.
The detection method of voltage test pencil of the present utility model is introduced in detail below：
In each test point engaged test, several luminous tubes of a tail all light wherein at least meeting one to the utility model
Individual luminous tube be it is normal, it is tested in circuit in have short circuit, loop or have the presence of various voltages and positive negative pulse stuffing.This
The circuit of utility model detection includes following several situations：
1st, there is the test in loop
Test have in normal circuit load do not have electricity test point after, then test electroprobe self by power supply just
Pole, probe A, load, the 4th resistance R4 and the second LED, form loop.By whether lighting the second LED judges that loop is
No conducting.
2nd, there is the positive pulse test in loop
Meanwhile, test circuit of the present utility model can be also used for carrying out the positive pulse test in loop.Test is normal
When having loading band positive pulse in circuit, then the 2nd LED can be often lighted in test circuit.When there is positive pulse, electric current is being visited
Head A, first resistor R1, a LED, the 4th resistance R4, finally flow back to load, form path, have now also lighted a LED
Lamp.By judging whether the first LED is lighted so as to determine whether that positive pulse is loaded.
When positive pulse voltage is higher than 9.5V, pulse current flows to its cells.Simultaneously when supply voltage is higher than 2.5V,
Electric current through the first diode D1, the second diode D2, the 3rd diode D3, the 4th diode D4, the 5th diode D5, the 6th
Diode D6, the 4th resistance R4, and return to earth electrode B.After the voltage high of the 4th resistance R4, bias current to rectifier bridge, point
Bright 3rd LED, and earth electrode B is returned to by 3rd resistor.
When positive pulse or voltage are higher than 9.5V, turn on the first triode Q1, electric current is through the 4th LED, the 5th electric
Resistance R5, the 6th resistance R6, the 9th resistance R9 and the second Zener diode Z2, into earth electrode B.By the 4th LED whether
Light, such that it is able to judge voltage whether more than 9.5V.In the present embodiment, the 4th LED is green light.
3rd, voltage tester
1. when load voltage is less than 3V, electric current flows successively through probe A, first resistor R1, the first LED, the 4th resistance
R4, earth electrode B, form loop, light the first LED, i.e. green light.
2. when voltage is higher than 6V, electric current from probe A, first resistor R1, a LED, the 4th resistance R4 to its cells, together
When be charged.Simultaneously when supply voltage is higher than 2.5V, electric current through the first diode D1, the second diode D2, the three or two
Pole pipe D3, the 4th diode D4, the 5th diode D5, composition bias current voltage stabilizing. the 6th diode D6, the 4th resistance R4, and return to
Earth electrode B.After the voltage high of the 4th resistance R4, bias current to rectifier bridge, the 3rd LED is lighted, and by 3rd resistor
Return to earth electrode B.
3. when positive pulse or voltage are higher than 9.5V, pulse current flows to its cells.Simultaneously when supply voltage is higher than
During 2.5V, electric current is through the first diode D1, the second diode D2, the 3rd diode D3, the 4th diode D4, the 5th diode
D5, composition bias current voltage stabilizing, then again through the 6th diode D6, the 4th resistance R4, and return to earth electrode B.When the 4th resistance
After the voltage high of R4, bias current to rectifier bridge, the 3rd LED is lighted, and earth electrode B is returned to by 3rd resistor.
When positive pulse or voltage are higher than 9.5V, turn on the first triode Q1, electric current is through the 4th LED, the 5th electric
Resistance R5, the 6th resistance R6, the 9th resistance R9 and the second Zener diode Z2, into earth electrode B.By the 4th LED whether
Light, such that it is able to judge voltage whether more than 9.5V.In the present embodiment, the 4th LED is green light.
4. the battery in dolly be 12V, voltage be higher than 13.5V when, make the second triode Q2 turn on, electric current is through the 5th
LED, the 5th resistance R5, the 6th resistance R6, the 7th resistance R7, the 8th resistance R8, the 9th resistance R9, the 8th diode D8,
One Zener diode Z1, the second Zener diode Z2, eventually pass back to earth electrode B.By judging whether the 5th LED is lighted,
So as to judge the load voltage whether more than 13.5V.After dolly starts, voltage is charged state higher than 13.5V so batteries,
In the present embodiment, the 5th LED is red light.
4th, voltage negative pulses test
Test have in normal circuit load do not have electricity test point after, then test electroprobe self by power supply just
Pole, probe A, load, the 4th resistance R4 and the second LED, form loop.By whether lighting the second LED judges that loop is
No conducting.Meanwhile, each negative pulse lights the 6th LED.
5th, there is the test of the carrier pulse in voltage
After a LED, the 3rd LED3, the 4th LED4, luminous tube being lighted on the basis of different voltage, each pulse point
Bright 6th LED.
Compared to prior art, the utility model can carry out the detection of several functions by testing needle, including loop is
Measurement of no conducting, electric pressure and positive pulse and negative pulse voltage etc..It is easy to use, without the need for being shifted gears.Test electroprobe
It is easy to use, judges in tested pilot that is fast, can interpolate that in circuit either with or without open circuit, loop or has voltage, short circuit, just
The state that pulse, negative pulse or dolly battery are electrically charged.And the battery that can be full of in test is carried out in itself handwriting.
The utility model is not limited to above-mentioned embodiment, if do not taken off to various changes of the present utility model or deformation
From spirit and scope of the present utility model, if these are changed and deformation belongs to claim of the present utility model and equivalent technologies
Within the scope of, then the utility model is also intended to comprising these changes and deforms.
Claims (10)
1. a kind of test circuit of voltage test pencil, it is characterised in that：Including power supply, earth electrode, probe and loop detection module；Institute
Stating loop detection module includes：First resistor, second resistance, the 4th resistance, the first LED, the second LED, the 6th diode
With the 7th diode；
The positive pole of the power supply by with probe be connected, while passing sequentially through first resistor, the first LED, the 4th resistance and connecing
Ground electrode connects；Positive pole one end of first LED is connected with the positive pole of power supply, and first LED negative pole one end passes through the 4th
Resistance is connected with earth electrode；
The negative pole of the power supply passes sequentially through second resistance, the second LED, the 4th resistance and is connected with earth electrode；Described second
Negative pole one end of LED is connected with the negative pole of power supply, and second LED positive pole one end is connected by the 4th resistance with earth electrode；
The negative pole of the power supply also passes sequentially through the 6th diode, the 4th resistance and is connected with earth electrode simultaneously；Described 6th 2
Positive pole one end of pole pipe is connected with the negative pole of power supply, and negative pole one end of the 6th diode is connected by the 4th resistance with earth electrode
Connect；
The positive pole of the 7th diode is connected with the 4th resistance, and negative pole is connected with the probe.
2. the test circuit of voltage test pencil according to claim 1, it is characterised in that：The loop detection module also includes first
Diode, the second diode, the 3rd diode, the 4th diode, the 5th diode, rectifier bridge, the 3rd LED and the 3rd are electric
Resistance；
In first diode, the second diode, the 3rd diode, the 4th diode and the 5th diode negative pole and positive pole according to
Secondary connection, wherein, the positive pole of first diode is connected with the positive pole and probe of power supply simultaneously；5th diode it is negative
Pole is connected by the 4th resistance with earth electrode；
The rectifier bridge has two exchange ends and two DC terminals；In described two exchange ends, one end is negative with the 5th diode
Pole connects, and the other end is grounded by 3rd resistor；In described two DC terminals, output one end is by the 3rd LED and input
Connection.
3. the test circuit of voltage test pencil according to claim 1, it is characterised in that：The loop detection module also includes first
Triode, the 4th LED, the 5th resistance, the 6th resistance, the 9th resistance and the second Zener diode；
The emitter-base bandgap grading of first triode is connected with probe, and the colelctor electrode of the first triode passes sequentially through the 4th LED, the 5th resistance
It is connected with earth electrode, the base stage of the first triode passes sequentially through the 6th resistance and the second Zener diode and connects with earth electrode
Connect；
Described 9th resistance one end is connected with the probe, and the other end is connected with second Zener diode.
4. the test circuit of voltage test pencil according to claim 3, it is characterised in that：The loop detection module also includes second
Triode, the 5th LED, the first Zener diode, the 8th diode, the 7th resistance and the 8th resistance；
The emitter-base bandgap grading of second triode be connected with probe, the colelctor electrode of the second triode by the 5th LED, the 5th resistance and
Earth electrode connects；The base stage of second triode pass sequentially through the 7th resistance, the first Zener diode, the 8th diode and
Second Zener diode is connected with earth electrode；
One end of 8th resistance is connected with the probe, and the other end is connected with first Zener diode.
5. the test circuit of voltage test pencil according to claim 1, it is characterised in that：The loop detection module also includes accompanying pressure
Rectification circuit；It is described to accompany voltage rectifier to include the tenth resistance, the 6th LED, the first electric capacity, the 11st resistance and the 3rd voltage stabilizing
Diode；
The probe passes sequentially through the tenth resistance, the 6th LED, the first electric capacity, the 11st resistance and is connected with earth electrode；It is described
The positive pole and the first capacitance connection of the 3rd Zener diode, negative pole is connected with probe.
6. a kind of voltage test pencil, it is characterised in that：Including handwriting, testing needle, luminous tube, electric wire and crocodile clip；The testing needle sets
Put in one end of handwriting, the luminous tube is arranged in the other end of handwriting；The crocodile clip is connected by electric wire with handwriting；Institute
State and be provided with inside handwriting detection circuit；
The detection circuit includes power supply, earth electrode, probe and loop detection module；The loop detection module includes：The
One resistance, second resistance, the 4th resistance, the first LED, the second LED, the 6th diode and the 7th diode；
The positive pole of the power supply by with probe be connected, while passing sequentially through first resistor, the first LED, the 4th resistance and connecing
Ground electrode connects；Positive pole one end of first LED is connected with the positive pole of power supply, and first LED negative pole one end passes through the 4th
Resistance is connected with earth electrode；
The negative pole of the power supply passes sequentially through second resistance, the second LED, the 4th resistance and is connected with earth electrode；Described second
Negative pole one end of LED is connected with the negative pole of power supply, and second LED positive pole one end is connected by the 4th resistance with earth electrode；
The negative pole of the power supply also passes sequentially through the 6th diode, the 4th resistance and is connected with earth electrode simultaneously；Described 6th 2
Positive pole one end of pole pipe is connected with the negative pole of power supply, and negative pole one end of the 6th diode is connected by the 4th resistance with earth electrode
Connect；
The positive pole of the 7th diode is connected with the 4th resistance, and negative pole is connected with the probe.
7. voltage test pencil according to claim 6, it is characterised in that：The loop detection module also include the first diode, the
Two diodes, the 3rd diode, the 4th diode, the 5th diode, rectifier bridge, the 3rd LED and 3rd resistor；
In first diode, the second diode, the 3rd diode, the 4th diode and the 5th diode negative pole and positive pole according to
Secondary connection, wherein, the positive pole of first diode is connected with the positive pole and probe of power supply simultaneously；5th diode it is negative
Pole is connected by the 4th resistance with earth electrode；
The rectifier bridge has two exchange ends and two DC terminals；In described two exchange ends, one end is negative with the 5th diode
Pole connects, and the other end is grounded by 3rd resistor；In described two DC terminals, output one end is by the 3rd LED and input
Connection.
8. voltage test pencil according to claim 6, it is characterised in that：The loop detection module also include the first triode, the
Four LEDs, the 5th resistance, the 6th resistance, the 9th resistance and the second Zener diode；
The emitter-base bandgap grading of first triode is connected with probe, and the colelctor electrode of the first triode passes sequentially through the 4th LED, the 5th resistance
It is connected with earth electrode, the base stage of the first triode passes sequentially through the 6th resistance and the second Zener diode and connects with earth electrode
Connect；
Described 9th resistance one end is connected with the probe, and the other end is connected with second Zener diode.
9. voltage test pencil according to claim 8, it is characterised in that：The loop detection module also include the second triode, the
Five LEDs, the first Zener diode, the 8th diode, the 7th resistance and the 8th resistance；
The emitter-base bandgap grading of second triode be connected with probe, the colelctor electrode of the second triode by the 5th LED, the 5th resistance and
Earth electrode connects；The base stage of second triode pass sequentially through the 7th resistance, the first Zener diode, the 8th diode and
Second Zener diode is connected with earth electrode；
One end of 8th resistance is connected with the probe, and the other end is connected with first Zener diode.
10. voltage test pencil according to claim 6, it is characterised in that：The loop detection module also includes accompanying voltage rectifier；
It is described to accompany voltage rectifier to include the tenth resistance, the 6th LED, the first electric capacity, the 11st resistance and the 3rd Zener diode；
The probe passes sequentially through the tenth resistance, the 6th LED, the first electric capacity, the 11st resistance and is connected with earth electrode；It is described
The positive pole and the first capacitance connection of the 3rd Zener diode, negative pole is connected with probe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620890575.XU CN206114744U (en) | 2016-08-16 | 2016-08-16 | Test pencil and test circuit thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620890575.XU CN206114744U (en) | 2016-08-16 | 2016-08-16 | Test pencil and test circuit thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206114744U true CN206114744U (en) | 2017-04-19 |
Family
ID=58512505
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620890575.XU Active CN206114744U (en) | 2016-08-16 | 2016-08-16 | Test pencil and test circuit thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206114744U (en) |
-
2016
- 2016-08-16 CN CN201620890575.XU patent/CN206114744U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN206990773U (en) | A kind of detection means for testing power module working condition | |
| CN107765062A (en) | Voltage test pencil and its test circuit | |
| CN206114744U (en) | Test pencil and test circuit thereof | |
| CN203224588U (en) | Connecting line detector | |
| CN107765070A (en) | A kind of Multifunction screw-driver with voltage tester and its test circuit | |
| CN209946352U (en) | HiL wire harness testing device | |
| CN107765063A (en) | Novel test pencil and its test circuit | |
| CN107765072A (en) | Multifunction screw-driver with voltage tester and its test circuit | |
| CN107765071A (en) | A kind of novel test pencil and its test circuit | |
| CN201583587U (en) | Circuit detecting device | |
| CN203950450U (en) | A kind of solution conductivity display | |
| CN102121955A (en) | Circuit detection device | |
| CN205809184U (en) | Simple pulse polarity tester | |
| CN201196661Y (en) | Multifunctional AC electroprobe | |
| CN203811733U (en) | Network tester | |
| CN203811734U (en) | Network tester | |
| CN203181322U (en) | Intelligent self-check device for LED lamps | |
| CN206696339U (en) | Digital display type accumulator charging cable voltage tester | |
| CN206975157U (en) | A kind of electric power connector cable detecting device | |
| CN206301026U (en) | LED test fixtures | |
| CN214539939U (en) | Capacitance pen | |
| CN208588692U (en) | Portable intelligent wine measuring instrument | |
| CN207742281U (en) | Portable vehicle line multifunctional tester | |
| CN107255768A (en) | A kind of electric power connector cable detecting device | |
| CN219757461U (en) | Self-adaptive sensitivity touch water detection tool |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |