CN201032487Y - Circuitry poor contact detector - Google Patents

Circuitry poor contact detector Download PDF

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Publication number
CN201032487Y
CN201032487Y CNU2007200183949U CN200720018394U CN201032487Y CN 201032487 Y CN201032487 Y CN 201032487Y CN U2007200183949 U CNU2007200183949 U CN U2007200183949U CN 200720018394 U CN200720018394 U CN 200720018394U CN 201032487 Y CN201032487 Y CN 201032487Y
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China
Prior art keywords
circuit
parallel
resistance
positive
display
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Expired - Fee Related
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CNU2007200183949U
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Chinese (zh)
Inventor
高子泉
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Individual
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Individual
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Priority to CNU2007200183949U priority Critical patent/CN201032487Y/en
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Publication of CN201032487Y publication Critical patent/CN201032487Y/en
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Expired - Fee Related legal-status Critical Current

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Abstract

The utility model relates to a circuit loose contact detector in the positive and negative power supply circuit inspection and repair field, which comprises a negative electrode or earth conductor detecting circuit, a positive electrode detecting circuit, and a display circuit, therein, a plurality of contact splices of the positive and negative electrode detecting circuit are respectively and relatively arranged on the input pin and the output pin of an integrated block, a resister is separately connected in parallel on the contact splices of the input pin, and then a capacitor and another resister are connected on the positive electrode of a power supply; the display circuit comprises the display circuit of the positive detecting circuit and the display circuit of the negative detecting circuit or the earth conductor detecting circuit symmetrically distributed and connected in parallel, the two display circuits are separately connected with the resister and a diode in series through a light emitting diode, and then connected with another resister and another diode in parallel, at last connected between the positive electrode and the negative electrode of the supply power in parallel. The utility model has the advantages that the structure is simple, and the operation is convenient, which has a powerful effect on the repairing aspect of vehicle electric appliances.

Description

The bad detector of circuit contacts
Technical field
The utility model relates to the bad detector of circuit contacts in positive-negative power circuit maintenance field.
Background technology
When the maintenance that relates to DC power-supply circuit; especially during the maintenance of vehicle circuit; run into because of power lead through regular meeting; ground strap; various fault that relay contact, loose contacts such as fuse cause, these phenomenon of the failure majorities all are interrupted; random, search instrument very difficult and that do not have to be correlated with and detect.
Summary of the invention
The purpose of this utility model is exactly the defective that exists at prior art, provide a kind of can the bad detector of circuit contacts quick, accurate and effective enforcement.
Its technical scheme is: be made up of negative pole or ground line detection circuit, anodal testing circuit and display circuit, wherein: negative pole or ground line detection circuit are corresponding respectively a plurality of contacts joints that is provided with on the input and output pin of integrated package (IC2), and polyphone electric capacity and resistance are received the positive pole of power supply behind the resistance that is connected in parallel respectively on the joint of the contact of input pin; Anodal testing circuit is corresponding respectively a plurality of contacts joint that is provided with on the input and output pin of integrated package (IC1), and behind the resistance that is connected in parallel respectively on the joint of the contact of input pin, receive the positive pole of power supply, after being connected in parallel resistance and electric capacity, the positive pole of power supply receives integrated package (IC1); Display circuit is composed in parallel by the display circuit of the anodal testing circuit that is symmetrically distributed and the display circuit of negative pole or ground line detection circuit, two display circuits are respectively by behind light emitting diode polyphone resistance and the diode, parallel resistance and diode finally are connected in parallel between the both positive and negative polarity of power supply again.
The utlity model has simple in structurely, easy to use, can play the effect of getting twice the result with half the effort aspect the vehicle electric element repairing.
Description of drawings
Accompanying drawing 1 is the testing circuit schematic diagram of a kind of negative pole electric wire (ground strap) loose contact alive.Accompanying drawing 2 is testing circuit schematic diagrams of a kind of positive source loose contact.Fig. 3 is a kind of display circuit schematic diagram.
Embodiment
With reference to accompanying drawing 1, ic chip 1 (model C D4050) is CMOS six non-inverting buffers, its six output pin a1-a6 are connected (with reference to accompanying drawing 3) with the common access pin (a1-a6) of display circuit respectively, six input pins connect contact pilotage A1-A6 and resistance R 3~R8 respectively, be linked into the anodal Vcc of power supply after six resistance parallel connections, resistance R 1 is connected between power switch and integrated circuit (IC) 1, the capacitor C 1.GND is a ground wire, and A1~A6 is the contact that is connected in the bonding loose contact of being suspected.
With reference to accompanying drawing 2, ic chip 2 (model C D4049) integrated package is CMOS six inverter buffers, and it still has the level conversion function under the situation of using single supply, so do the current potential conversion with it.Its six output pin b1-b6 are connected (with reference to accompanying drawing 3) with the common access pin (b1-b6) of display circuit respectively, six input pins connect contact pilotage B1~B6 and resistance R 9~R14 respectively, the electric capacity capacitor C 2, resistance R 2 of contacting again after six resistance parallel connections is linked into the anodal Vcc of power supply, and resistance R 2 is connected between power switch and the integrated circuit (IC) 2.GND is a ground wire, and B1~B6 is the contact that is connected in the bonding loose contact of being suspected.
With reference to accompanying drawing 3, resistance R n1, Rn2 connect respectively between two negative electrodes and controllable silicon Kn1-Kn2 of LED n, play the restriction function of current; The positive pole of diode Dn1, Dn2 is connected respectively to the a1-a6 contact of ic chip 1, the b1-b6 contact of ic chip 2, and the negative pole of diode Dn1, Dn2 connects controllable silicon Kn1, Kn2 respectively, and connects ground connection GND behind resistance R n3 and the Rn4 respectively.As long as any end of diode Dn1-Dn2 has noble potential, the controllable silicon that is associated with that end will triggering and conducting, and light emitting diode will be lighted.At first connect suspicious points during use, closed then power switch is monitored, if a certain light emitting diode lighted, promptly there is the loose contact phenomenon in the explanation test side corresponding with it.Want to monitor again, as long as power cutoff reopens just passable again.

Claims (1)

1. bad detector of circuit contacts, it is characterized in that: form by negative pole or ground line detection circuit, anodal testing circuit and display circuit, wherein: negative pole or ground line detection circuit are corresponding respectively a plurality of contacts joints that is provided with on the input and output pin of integrated package (IC2), and polyphone electric capacity and resistance are received the positive pole of power supply behind the resistance that is connected in parallel respectively on the joint of the contact of input pin; Anodal testing circuit is corresponding respectively a plurality of contacts joint that is provided with on the input and output pin of integrated package (IC1), and behind the resistance that is connected in parallel respectively on the joint of the contact of input pin, receive the positive pole of power supply, after being connected in parallel resistance and electric capacity, the positive pole of power supply receives integrated package (IC1); Display circuit is composed in parallel by the display circuit of the anodal testing circuit that is symmetrically distributed and the display circuit of negative pole or ground line detection circuit, two display circuits are respectively by behind light emitting diode polyphone resistance and the diode, parallel resistance and diode finally are connected in parallel between the both positive and negative polarity of power supply again.
CNU2007200183949U 2007-02-02 2007-02-02 Circuitry poor contact detector Expired - Fee Related CN201032487Y (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CNU2007200183949U CN201032487Y (en) 2007-02-02 2007-02-02 Circuitry poor contact detector

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CNU2007200183949U CN201032487Y (en) 2007-02-02 2007-02-02 Circuitry poor contact detector

Publications (1)

Publication Number Publication Date
CN201032487Y true CN201032487Y (en) 2008-03-05

Family

ID=39164377

Family Applications (1)

Application Number Title Priority Date Filing Date
CNU2007200183949U Expired - Fee Related CN201032487Y (en) 2007-02-02 2007-02-02 Circuitry poor contact detector

Country Status (1)

Country Link
CN (1) CN201032487Y (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102193071A (en) * 2010-03-18 2011-09-21 中国科学院电子学研究所 Fault monitoring circuit for state of positive-negative power supply of extension set
CN102755161A (en) * 2012-03-30 2012-10-31 浙江好络维医疗技术有限公司 Lead drop detection device and method for electrocardio monitoring
CN101846710B (en) * 2009-03-25 2012-12-19 中茂电子(深圳)有限公司 Contact checking system of object to be detected

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101846710B (en) * 2009-03-25 2012-12-19 中茂电子(深圳)有限公司 Contact checking system of object to be detected
CN102193071A (en) * 2010-03-18 2011-09-21 中国科学院电子学研究所 Fault monitoring circuit for state of positive-negative power supply of extension set
CN102193071B (en) * 2010-03-18 2013-03-27 中国科学院电子学研究所 Fault monitoring circuit for state of positive-negative power supply of extension set
CN102755161A (en) * 2012-03-30 2012-10-31 浙江好络维医疗技术有限公司 Lead drop detection device and method for electrocardio monitoring
CN102755161B (en) * 2012-03-30 2014-10-08 浙江好络维医疗技术有限公司 Lead drop detection device and method for electrocardio monitoring

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C14 Grant of patent or utility model
GR01 Patent grant
C17 Cessation of patent right
CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20080305