CN105067955A

CN105067955A - Electric wire breakpoint detector

Info

Publication number: CN105067955A
Application number: CN201510500853.6A
Authority: CN
Inventors: 周云侠
Original assignee: Individual
Current assignee: Individual
Priority date: 2015-08-14
Filing date: 2015-08-14
Publication date: 2015-11-18

Abstract

The invention discloses an electric wire breakpoint detector, comprising a 3V DC power supply, an electric wire breakpoint circuit, a signal detection buffering circuit, a pulse generation circuit, and a level signal amplification and display circuit; a core member of the electric wire breakpoint is a hex inverter ICI, the model of which is CD4069. The fact that the quick detection for the breaking of the cable, illumination wires, telephone lines and network lines which are embedded inside the wall is very difficult, particularly for the cases that the distance is long or that a universal meter cannot be used between the upper floor and the lower floor. Furthermore, the specialized cable breaking fault detection positioner is expensive and is not universal in the cable maintenance filed or the electrician field. The cable breakpoint detector disclosed by the invention can compensate and overcome the flaws, and can detect the connection and disconnection of the circuit in the process of electronic device installation, debugging and maintenance. The electric wire breakpoint detector is practical, low in cost, easy in use, reliable in detection result, and easy to popularize.

Description

Electric wire breakpoint detector

Technical field

The invention belongs to technical field of electrical measurement, is about a kind of electric wire breakpoint detector.

Background technology

The broken string of the cable laid in quick detection wall, illuminating line, telephone wire or grid line is the cumbersome thing of part, particularly cannot multimeter be used simply to test under distance or upstairs house, there is broken string situation once doubtful, substitute cable not in time and will affect normal work.DX-A molded line cable disconnection fault test position fix instrument on market is a kind of is the instrumentation that cables manufacturing factory, unit in charge of construction and electric wire applying unit are searched cable disconnection fault and developed specially, 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 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, electric wire breakpoint 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 in detail electric wire breakpoint detector of the present invention necessity involved in implementation process, guardian technique content.

Summary of the invention

Goal of the invention and beneficial effect: the broken string detecting cable, illuminating line, telephone wire or the grid line laid in wall is fast the cumbersome thing of part, particularly cannot multimeter be used simply to test under distance or upstairs house, there is broken string situation once doubtful, substitute cable not in time and will affect normal work.And 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, electric wire breakpoint 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.

Circuit working principle: the circuit core of electric wire breakpoint detector have employed one piece of CMOS hex inverter IC1 (CD4069), wherein the G1 of hex inverter IC1 and the G2 of hex inverter IC1 is used for whether there is 220V AC field in detection electric wire, and has buffering sends faint alternating voltage here effect from probe TX concurrently.It is 1KHz pulse producer that the G3 of hex inverter IC1 and the G4 of hex inverter IC1 forms frequency; The 4th pin output level height of the G2 of hex inverter IC1 can be opened or block oscillatory circuit.When the TX that pops one's head in is away from AC field, G2 the 4th pin of hex inverter IC1 exports as low level, and switching diode D3 conducting, oscillatory circuit is blocked, and at this moment G4 the 8th pin of hex inverter IC1 is low level, and NPN transistor VT1 ends, and LED does not work.When the TX that pops one's head in shifts near AC field, the 4th pin of the G2 of hex inverter IC1 is high level, and at this moment switching diode D3 ends, and oscillatory circuit works immediately, and NPN transistor VT1 conducting, LED is lighted.Because flicker frequency is higher, when thus observing LED, present continuous luminous state.

In sum: according to the duty of LED, the position of electric wire breakpoint or concealed wiring is judged easily.

Technical characteristic: electric wire breakpoint detector, it comprises 3V direct supply, electric wire breaking point detection circuit, detection signal buffer circuit, pulse-generator circuit, level signal amplification and display circuit, it is characterized in that:

Electric wire breaking point detection circuit: it is made up of the G1 of the TX that pops one's head in, resistance R1, switching diode D1, switching diode D2 and hex inverter IC1, the model that hex inverter IC1 selects is CD4069, one end of probe TX connects the negative pole of switching diode D1 and the positive pole of switching diode D2 by resistance R1, the positive pole connection circuit ground GND of switching diode D1, the negative pole of switching diode D2 connects the 1st pin of hex inverter IC1, and the 2nd pin of hex inverter IC1 connects detection signal buffer circuit;

Detection signal buffer circuit: it is made up of the G2 of hex inverter IC1, the 14th pin connection circuit positive pole VCC of hex inverter IC1, the 7th pin connection circuit ground GND of hex inverter IC1,3rd pin of hex inverter IC1 connects the 2nd pin of hex inverter IC1, and the 4th pin of hex inverter IC1 connects pulse-generator circuit;

Pulse-generator circuit: it is made up of G3 and G4 of switching diode D3, resistance R2, resistance R3, electric capacity C1 and hex inverter IC1,5th pin of hex inverter IC1 connects the positive pole of switching diode D3, the negative pole of switching diode D3 connects the 4th pin of hex inverter IC1, one end of the 5th pin connecting resistance R2 of hex inverter IC1, one end of the 6th pin connecting resistance R3 of hex inverter IC1 and the 9th pin of hex inverter IC1,8th pin of hex inverter IC1 connects one end of electric capacity C1, the other end of other end connecting resistance R3 of resistance R2 and the other end of electric capacity C1;

Level signal is amplified and display circuit: it is made up of NPN transistor VT1, LED and resistance R4, the base stage of NPN transistor VT1 connects the 8th pin of hex inverter IC1, the collector of NPN transistor VT1 connects LED negative pole, the positive pole of LED passes through the emitter connection circuit ground GND of resistance R4 connection circuit positive pole VCC, NPN transistor VT1;

The positive pole connection circuit positive pole VCC of 3V direct supply, the negative pole connection circuit ground GND of 3V direct supply.

Accompanying drawing explanation

Accompanying drawing 1 is the embodiment circuit working schematic diagram that the invention provides an electric wire breakpoint detector; Their connection circuit ground GND, circuit anode VCC respectively of 7th pin of hex inverter IC1 and the 14th pin.

Embodiment

According to the electric wire breakpoint 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.

The technical parameter of components and parts and selection requirement

IC1 is hex inverter, and the model selected is CD4069, also can use TC4069; CD4069, six identical phase inverters of structure are had in chip, have 14 pins, its packing forms is DIP, the present embodiment only uses 4 phase inverters wherein, that is: phase inverter G1, phase inverter G2, phase inverter G3 and phase inverter G4, its 7th pin connection circuit ground GND, its 14th pin connection circuit positive pole VCC;

D1 ~ D3 is switching diode, and the model that 3 switching diodes are selected is 1N4148;

LED is light emitting diode, selects diameter to be the red high-brightness light emitting diode of ￠ 5;

Resistance all selects RTX-1/8W type carbon resister, and the resistance of resistance R1 is 1M Ω, and the resistance of resistance R2 is 910K Ω, and the resistance of resistance R3 is 220K Ω, and the resistance of resistance R2 is 56 Ω;

C1 is electric capacity, selects Leaded Ceramic Disc Capacitor, and its capacity is 2200PF;

DC is 3V direct supply, because circuit power consumption is minimum, therefore can use 9V laminated cell.

Circuit production main points, circuit debugging and using method

The making of probe TX: use diameter is ￠ 2mm, the wire of long 80mm, its front end is curved " J " shape, for increasing the sensitivity that probe TX detects.

Because the circuit structure of electric wire breakpoint 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 only needs to carry out simple debugging and can normally work;

The element used due to electric wire breakpoint detector circuit is little, thus can put in can by all components and parts with small-sized circuit board;

Circuit ON 3V direct supply, the resistance of adjusting resistance R1, makes the output end voltage of the G4 of hex inverter IC1 be about 2.5V, more suitably adjusts the resistance of build-out resistor R4, makes in electric wire breaking point detection process, and LED the brightest then making debugging is complete.

Circuit components layout of the present invention, circuit structure design, its shape and size etc. of outward appearance are not all gordian techniquies of the present invention; neither application claims protection technology contents; because not affecting specific implementation process of the present invention, therefore do not illustrate one by one in the description.

Claims

1. an electric wire breakpoint detector, it comprises 3V direct supply, electric wire breaking point detection circuit, detection signal buffer circuit, pulse-generator circuit, level signal amplification and display circuit, it is characterized in that:

The G1 composition of described electric wire breaking point detection electricity routing probe TX, resistance R1, switching diode D1, switching diode D2 and hex inverter IC1, the model that hex inverter IC1 selects is CD4069, one end of probe TX connects the negative pole of switching diode D1 and the positive pole of switching diode D2 by resistance R1, the positive pole connection circuit ground GND of switching diode D1, the negative pole of switching diode D2 connects the 1st pin of hex inverter IC1, and the 2nd pin of hex inverter IC1 connects detection signal buffer circuit;

Described detection signal buffer circuit is made up of the G2 of hex inverter IC1, the 14th pin connection circuit positive pole VCC of hex inverter IC1, the 7th pin connection circuit ground GND of hex inverter IC1,3rd pin of hex inverter IC1 connects the 2nd pin of hex inverter IC1, and the 4th pin of hex inverter IC1 connects pulse-generator circuit;

Described pulse-generator circuit is made up of G3 and G4 of switching diode D3, resistance R2, resistance R3, electric capacity C1 and hex inverter IC1,5th pin of hex inverter IC1 connects the positive pole of switching diode D3, the negative pole of switching diode D3 connects the 4th pin of hex inverter IC1, one end of the 5th pin connecting resistance R2 of hex inverter IC1, one end of the 6th pin connecting resistance R3 of hex inverter IC1 and the 9th pin of hex inverter IC1,8th pin of hex inverter IC1 connects one end of electric capacity C1, the other end of other end connecting resistance R3 of resistance R2 and the other end of electric capacity C1;

Described level signal is amplified and display circuit is made up of NPN transistor VT1, LED and resistance R4, the base stage of NPN transistor VT1 connects the 8th pin of hex inverter IC1, the collector of NPN transistor VT1 connects the negative pole of LED, the positive pole of LED passes through the emitter connection circuit ground GND of resistance R4 connection circuit positive pole VCC, NPN transistor VT1;

The positive pole connection circuit positive pole VCC of described 3V direct supply, the negative pole connection circuit ground GND of 3V direct supply.