CN104267308A - Fast detector for access circuit and open circuit - Google Patents

Fast detector for access circuit and open circuit Download PDF

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Publication number
CN104267308A
CN104267308A CN201410605020.1A CN201410605020A CN104267308A CN 104267308 A CN104267308 A CN 104267308A CN 201410605020 A CN201410605020 A CN 201410605020A CN 104267308 A CN104267308 A CN 104267308A
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China
Prior art keywords
circuit
resistance
pin
time base
fast detector
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Pending
Application number
CN201410605020.1A
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Chinese (zh)
Inventor
黄月华
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黄月华
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Priority to CN201410605020.1A priority Critical patent/CN104267308A/en
Publication of CN104267308A publication Critical patent/CN104267308A/en
Pending legal-status Critical Current

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Abstract

The invention discloses a fast detector for an access circuit and an open circuit. The fast detector for the access circuit and the open circuit is characterized by comprising a 6V direct-current power supply, a detection circuit and Schmitt trigger circuit and an acousto-optic indicating circuit, wherein the detection circuit and Schmitt trigger circuit comprises a detector probe TX1, a detector probe TX2, a resistor R1, a resistor R2, a time-base circuit IC1 and an anti-interference capacitor C1; the model selected for the time-base circuit IC1 is NE555; the acousto-optic indicating circuit comprises a green light emitting diode LED1, a voltage dropping resistor R3, a red light emitting diode LED2, a voltage dropping resistor R4 and a buzzer HA. The fast detector for the access circuit and the open circuit can remedy the defects that a professional cable break failure testing locator is high in the price and is not easy for popularization in the work fields of cable maintenance, electrical technology and the like. The fast detector for the access circuit and the open circuit can further check the make-and-break situation of the circuit during the electronic equipment installation, debugging and maintenance processes; the fast detector for the access circuit and the open circuit is a practical tool which is convenient to use, reliable in testing result and is easy for popularization.

Description

Path break circuit fast detector
Technical field
The invention belongs to electronics and field of measuring technique, relate to a kind of path break circuit fast detector.
Background technology
On market, DX-A molded line cable disconnection fault test position fix instrument is the special a kind of instrument searched cable disconnection fault and develop for cables manufacturing factory, unit in charge of construction and electric wire applying unit.This instrument develops to form on the empirical basis that summary absorbs the measurement of all kinds of Method of Cable Trouble Point, reparation.DX-A molded line cable disconnection fault test position fix instrument is made up of the range observation of digitizing breakpoint, breakpoint fine positioning signal source, breakpoint fine positioning detector three part.The features such as this instrument has breakpoint range observation, breakpoint fine positioning signal source breakpoint fine positioning detector, full digital display, level of integrated system is high, volume is little, lightweight, easy to carry.Even without practical experience librarian use it can find breakpoint place like clockwork equally.
But professional cable disconnection fault test position fix instrument have price high, in the career field such as maintaining cables and electrician the not easily problem such as universal, path break circuit fast detector of the present invention can make up and overcome these defects, it can also be installed at electronic equipment, debug and in maintenance process, the break-make situation of checking circuit, it is that a kind of price is low, easy to use, testing result reliable, is easy to universal utility, is suitable for factory's batch exploitation.
Below describe the core technology content that path break circuit fast detector of the present invention is involved in implementation process in detail.
Summary of the invention
Goal of the invention and beneficial effect: professional cable disconnection fault test position fix instrument have price high, in the career field such as maintaining cables and electrician the not easily problem such as universal, path break circuit fast detector of the present invention can make up and overcome these defects, it can also be installed at electronic equipment, debug and in maintenance process, the break-make situation of checking circuit, it is that a kind of price is low, easy to use, testing result reliable, is easy to universal utility, is suitable for factory's batch exploitation.
Circuit working principle: path break circuit fast detector is that used time base IC circuit 1 is connected into Schmidt trigger.Before the use, detection probe TX1 and detection probe TX2 is in open-circuit condition, at this moment the 2nd pin of time base circuit IC1 and the 6th pin are high level, 3rd pin of time base circuit IC1 and the equal output low level of the 7th pin, therefore green LED LED1 and red light emitting diodes LED2 is all not luminous, hummer HA also not sounding.
Therefore, when detection probe TX1 and detection probe TX2 accesses circuit-under-test two ends, if LED 2 luminescence represents that between circuit-under-test two ends be path, otherwise green LED LED1 is luminous.
Generally, equivalent resistance≤20 Ω of circuit-under-test point-to-point transmission is considered as path.When detection probe TX1 and detection probe TX2 contact circuit-under-test 2 respectively, if 2 resistance > 20 Ω, then the 2nd pin of time base circuit IC1 and the 6th pin voltage are greater than supply voltage 1/3, therefore time base circuit IC1 output state is constant, two lumination of light emitting diode states also remain unchanged; If 2 resistance≤20 Ω, then the 2nd pin of time base circuit IC1 and the 6th pin voltage are just less than 1/3 of supply voltage, therefore the 3rd pin output switching activity of time base circuit IC1 becomes high level, make red light emitting diodes LED2 luminescence instruction, simultaneously hummer HA also sounds a buzzer prompting, at this moment the 7th pin inside open circuit of time base circuit IC1, makes green LED LED1 end not luminous.
Accompanying drawing explanation
Accompanying drawing 1 is path break circuit fast detector provided by the invention embodiment circuit working schematic diagram.
Embodiment
According to the path break circuit fast detector circuit working schematic diagram shown in accompanying drawing 1 and accompanying drawing explanation, and according to annexation between components and parts in each several part circuit described in summary of the invention, and components and parts technical parameter described in embodiment requires and circuit production main points are carried out enforcement and can be realized the present invention, is further described correlation technique of the present invention below in conjunction with embodiment.
Technical characteristic: path break circuit fast detector, it comprises 6V direct supply, testing circuit and Schmitt trigger circuit, acousto-optic indicating circuit, it is characterized in that:
Testing circuit and Schmitt trigger circuit: it is by detection probe TX1 and detection probe TX2, resistance R1 and resistance R2, time base circuit IC1, anti-interference capacitor C1 forms, the model that time base circuit IC1 selects is NE555, time base circuit IC1 the 2nd pin and the 6th pin connecting resistance R1 one end and resistance R2 one end, another termination of resistance R2 detection probe TX1, resistance R1 other end connection circuit positive pole VCC, time base circuit IC1 the 4th pin and the 8th pin connection circuit positive pole VCC, time base circuit IC1 the 5th pin connects anti-interference capacitor C1 one end, the 1st pin connection circuit ground GND of the anti-interference capacitor C1 other end and time base circuit IC1,
Acousto-optic indicating circuit: it is made up of green LED LED1 and dropping resistor R3, red light emitting diodes LED2 and dropping resistor R4, hummer HA, time base circuit IC1 the 7th pin connects the negative pole of green LED LED1 by resistance R3, the positive pole connection circuit positive pole VCC of green LED LED1, the positive pole of time base circuit IC1 the 3rd pin connecting resistance R4 one end and hummer HA, the positive pole of another termination red light emitting diodes of resistance R4 LED2, the negative pole of hummer HA and the negative pole connection circuit ground GND of red light emitting diodes LED2;
The positive pole of 6V direct supply is connected with circuit anode VCC, the negative pole connection circuit ground GND and detection probe TX2 of 6V direct supply.
The technical parameter of components and parts and selection requirement
IC1 is time base circuit, and the model selected is NE555 or selects KA555; Time base circuit IC1 is that 8 pin dual inline type DIP encapsulate, each pin function respectively: the 1st pin be circuit ground GND; 2nd pin is trigger end; 3rd pin output terminal; 4th pin preset end; 5th pin is control voltage; 6th pin thresholding (threshold value); 7th pin is discharge end; 8th pin connection circuit positive pole VCC;
Resistance all selects the carbon resister of 1/8W, and the resistance of resistance R1 is 1K Ω; The resistance of resistance R2 is 510 Ω; The resistance of resistance R3 is 470 Ω; The resistance of resistance R4 is 470 Ω;
C1 is anti-interference capacitor, and its capacity is 0.01 μ F;
LED1 is green LED, LED2 is red light emitting diodes, adopts the common green LED of ¢ 5mm and common red light emitting diodes respectively;
HA is hummer, selects hummer to be built-in with sound signal circuit for generating, and operating voltage is 5V;
Detection probe TX1 and detection probe TX2 uses red test pencil and the black meter pen of common multimeter respectively;
DC is 6V direct supply, and 4 joint No. 5 alkaline batteries can be used to be composed in series.
Circuit production main points and circuit debugging
Because the circuit structure of path break circuit fast detector is fairly simple, as long as the electronic devices and components performance generally selected is intact, and the components and parts annexation to specifications in accompanying drawing 1 is welded, physical connection line and welding quality are through carefully checking correctly, and circuit of the present invention does not need to carry out debugging and can normally work;
Outward appearance and size etc. as the layout of circuit components of the present invention, board design, high speed detector high speed detector are not gordian techniquies of the present invention; neither the technology contents of application claims protection, therefore to describe in detail no longer one by one in the description.

Claims (1)

1. a path break circuit fast detector, it comprises 6V direct supply, testing circuit and Schmitt trigger circuit, acousto-optic indicating circuit, it is characterized in that:
Described testing circuit and Schmitt trigger circuit are by detection probe TX1 and detection probe TX2, resistance R1 and resistance R2, time base circuit IC1, anti-interference capacitor C1 forms, the model that time base circuit IC1 selects is NE555, time base circuit IC1 the 2nd pin and the 6th pin connecting resistance R1 one end and resistance R2 one end, another termination of resistance R2 detection probe TX1, resistance R1 other end connection circuit positive pole VCC, time base circuit IC1 the 4th pin and the 8th pin connection circuit positive pole VCC, time base circuit IC1 the 5th pin connects anti-interference capacitor C1 one end, the 1st pin connection circuit ground GND of the anti-interference capacitor C1 other end and time base circuit IC1,
Described acousto-optic indicating circuit is made up of green LED LED1 and dropping resistor R3, red light emitting diodes LED2 and dropping resistor R4, hummer HA, time base circuit IC1 the 7th pin connects the negative pole of green LED LED1 by resistance R3, the positive pole connection circuit positive pole VCC of green LED LED1, the positive pole of time base circuit IC1 the 3rd pin connecting resistance R4 one end and hummer HA, the positive pole of another termination red light emitting diodes of resistance R4 LED2, the negative pole of hummer HA and the negative pole connection circuit ground GND of red light emitting diodes LED2;
The positive pole of described 6V direct supply is connected with circuit anode VCC, the negative pole connection circuit ground GND and detection probe TX2 of 6V direct supply.
CN201410605020.1A 2014-10-30 2014-10-30 Fast detector for access circuit and open circuit Pending CN104267308A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201410605020.1A CN104267308A (en) 2014-10-30 2014-10-30 Fast detector for access circuit and open circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201410605020.1A CN104267308A (en) 2014-10-30 2014-10-30 Fast detector for access circuit and open circuit

Publications (1)

Publication Number Publication Date
CN104267308A true CN104267308A (en) 2015-01-07

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CN201410605020.1A Pending CN104267308A (en) 2014-10-30 2014-10-30 Fast detector for access circuit and open circuit

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104777351A (en) * 2015-04-22 2015-07-15 国家电网公司 Insulating test electric pole
CN105841776A (en) * 2015-01-15 2016-08-10 佛山市顺德区美的电热电器制造有限公司 Water level detection circuit, self-checking method thereof, and cooking utensil

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5168198A (en) * 1990-03-20 1992-12-01 Kabushiki Kaisha Toshiba Lamplight failure detection system
JP2010151576A (en) * 2008-12-25 2010-07-08 Chugoku Electric Power Co Inc:The Insulation diagnostic system
CN102621450A (en) * 2012-03-26 2012-08-01 朱虹 Cable breakage detector
CN202383226U (en) * 2011-12-11 2012-08-15 陈子杨 Broken cable detector
CN202735458U (en) * 2012-08-09 2013-02-13 周芸 Cable breakage detector
CN103439618A (en) * 2013-09-09 2013-12-11 黄月华 Low-capacity capacitor tester
CN103698661A (en) * 2014-01-10 2014-04-02 周云侠 Cable breakage detection device
CN204228875U (en) * 2014-10-30 2015-03-25 黄月华 Path break circuit fast detector

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5168198A (en) * 1990-03-20 1992-12-01 Kabushiki Kaisha Toshiba Lamplight failure detection system
JP2010151576A (en) * 2008-12-25 2010-07-08 Chugoku Electric Power Co Inc:The Insulation diagnostic system
CN202383226U (en) * 2011-12-11 2012-08-15 陈子杨 Broken cable detector
CN102621450A (en) * 2012-03-26 2012-08-01 朱虹 Cable breakage detector
CN202735458U (en) * 2012-08-09 2013-02-13 周芸 Cable breakage detector
CN103439618A (en) * 2013-09-09 2013-12-11 黄月华 Low-capacity capacitor tester
CN103698661A (en) * 2014-01-10 2014-04-02 周云侠 Cable breakage detection device
CN204228875U (en) * 2014-10-30 2015-03-25 黄月华 Path break circuit fast detector

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
陶时澍等: "便携式电缆断路点测试仪", 《电测与仪表》 *

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105841776A (en) * 2015-01-15 2016-08-10 佛山市顺德区美的电热电器制造有限公司 Water level detection circuit, self-checking method thereof, and cooking utensil
CN105841776B (en) * 2015-01-15 2019-03-12 佛山市顺德区美的电热电器制造有限公司 Water level detection circuit and its self checking method and cooking apparatus
CN104777351A (en) * 2015-04-22 2015-07-15 国家电网公司 Insulating test electric pole

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Application publication date: 20150107

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