CN109270391A - A kind of fire electricity line detection device - Google Patents
A kind of fire electricity line detection device Download PDFInfo
- Publication number
- CN109270391A CN109270391A CN201811135183.2A CN201811135183A CN109270391A CN 109270391 A CN109270391 A CN 109270391A CN 201811135183 A CN201811135183 A CN 201811135183A CN 109270391 A CN109270391 A CN 109270391A
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- Prior art keywords
- circuit
- connection
- collector
- triode
- resistance
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Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/50—Testing of electric apparatus, lines, cables or components for short-circuits, continuity, leakage current or incorrect line connections
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/50—Testing of electric apparatus, lines, cables or components for short-circuits, continuity, leakage current or incorrect line connections
- G01R31/58—Testing of lines, cables or conductors
Abstract
A kind of fire electricity line detection device, for detecting the voltage drop of fire electricity line, including input circuit, rectification circuit, comparison circuit, amplifying circuit and output display circuit；Wherein, input circuit, rectification circuit, comparison circuit, amplifying circuit and output display circuit are connected with this.Apparatus of the present invention simplicity can be carried around, and whether the light on and off of LED light are triggered by setting gate valve value qualified intuitively to show, testing staff is facilitated to judge；The present invention is also built-in dial plate, can intuitively show the voltage drop numerical value of testing product, disconnection problem can be judged whether there is, to be confirmed whether to eliminate by adjusting potentiometer and observing dial plate.
Description
Technical field
The present invention relates to detection device fields, and in particular to a kind of fire electricity line detection device.
Background technique
Security against fire is the people's livelihood field concerning the personal safety of China citizen, with the propulsion of China's urbanization, great Liang Gao
Layer house is rised sheer from level ground in short supply to alleviate land used, however building height is higher, and security level requires higher, and matching disappears
Anti- safety equipment requires also higher.
According to the requirement of security against fire method and code of building design that China is put into effect recently, the demanding building of security against fire
In certain important equipments in require it to connect cable its voltage drop must not exceed 20%, to guarantee that related important equipment can be
It works under stable voltage rating.It links particularly with the solenoid valves classes such as steel cylinder are started in exhaust smoke valve, air port, gas extinguishing system
Equipment leads to the excessive formation line drop of interlocking equipment action current in power bus as being real " large electricity consumer ", into
And the abnormal starting of equipment low pressure is caused not start even, lose the setting original intention of security against fire.So the existing skill of fire electricity line
In art, there is not related easy portable proprietary detection device also.
Therefore, existing cable manufacturer needs one kind that detection can be facilitated to detect finished cable, to guarantee finished cable
Reach requirement before factory.
Summary of the invention
The problem of being proposed according to background technique now provides a kind of fire electricity line detection device to solve, next to this hair
It is bright to be further elaborated.
A kind of fire electricity line detection device, for detecting the voltage drop of fire electricity line, including input circuit, rectification circuit,
Comparison circuit, amplifying circuit and output display circuit；Wherein,
Input circuit accesses cable under test, port A connecting triode T by port A, port B1Base stage and pass through electricity
Position device R1It is connected to power supply, port B connecting triode T2Base stage and pass through resistance R0Ground connection, using triode T1And T2Composition
The differential amplifier circuit of double-width grinding Single-end output, triode T4Collector as output end；
Rectification circuit, including four connections diode D annular in shape1、D2、D3、D4, diode D1Cathode and D4Anode
Connect the output end of input circuit, diode D1Anode connect D2Anode, D4Cathode connect D3Cathode, D2Cathode and
D3Anode connection after be grounded, diode D1Anode and D2Anode connection after extraction and D4Cathode and D3Cathode connection
Extraction connection after output end as rectification circuit；
Comparison circuit, including comparator V, the output end of the normal phase input end connection rectification circuit of comparator V, comparator V
Negative-phase input pass through resistance R5It is connected to power supply, the normal phase input end of comparator V passes through resistance R4It is connected to ground wire, is compared
The output of device V passes through feedback resistance R6It is connected to normal phase input end, the threshold value of comparator V compares according to actually required determination
Output end of the output of device V as comparison circuit；
Amplifying circuit, including at least one level amplifying circuit, including triode T8And T9The composite amplifier of composition, three poles
Pipe T8Base stage pass through resistance R7Connect the output of comparison circuit, T8Emitter and T9Base stage connection, T8Collector and T9
Collector connection after and be connected to power supply, T9Emitter pass through resistance R9Ground connection, T8With T9The collector of connection is as amplification
The output end of circuit；
Display circuit, including LED light and ammeter, LED light are arranged in amplifying circuit T8、T9Collector output on, electricity
Flow table and resistance R10It is arranged in parallel after series connection at the both ends of amplifying circuit.
Further, it is also protected in the input circuit and includes current source current, current source current includes triode T3、T4、T5、
T6And T7；It is also protected in input circuit and includes load of the active circuit as differential amplifier circuit, active circuit includes triode T10With
T11。
Further, in the differential amplifier circuit, triode T1And T2Collector connection, T1Base connections mouth
A, T2Base connections mouth B, T1Emitter connecting triode T3Emitter, T2Emitter connect T4Emitter, T3
And T4Base stage connection；T3Collector and T6Collector connection, T4Collector and T7Collector connection, T6And T7Base
Pole interconnection, T6Pass through resistance R1Ground connection, T7Pass through resistance R3Ground connection；T3With T6Connected collector again with T5Base stage be connected, T5's
Emitter and T6And T7Connected base stage connection passes through resistance R again2Ground connection, T5Collector access voltage；Triode T1And T2
The collector and T of connection10Collector connection, T10And T11Base stage be connected after again with T10Collector connection, T10And T11's
Emitter connects power supply, T11Collector be connected to T3And T4Connected base stage on.
Further, the threshold value of the comparator V in the comparison circuit is its practical added detection voltage value U carried
0.8 times, i.e. 0.8U.
Further, in at least one level amplifying circuit, amplifying circuit replaces triode device using cmos device.
Further, amplifying circuit both ends access voltmeter directly in parallel.
The utility model has the advantages that apparatus of the present invention simplicity can be carried around, the light on and off of LED light are triggered by setting gate valve value come straight
It whether qualified sees display, testing staff is facilitated to judge；The present invention is also built-in dial plate, can intuitively show the voltage of testing product
Numerical value is dropped, disconnection problem can be judged whether there is, to be confirmed whether to eliminate by adjusting potentiometer and observing dial plate.
Detailed description of the invention
Fig. 1: schematic structural view of the invention；
Fig. 2: circuit diagram of the present invention.
Specific embodiment
A specific embodiment of the invention is set forth now in conjunction with attached drawing.
A kind of fire electricity line detection device, by its exterior is equipped with port A, port B access cable under test ends A '
And B ', whether judge to access cable by the light on and off situation of LED light (indicator light) qualified, when LED is bright, then cable qualification is represented,
It does not work, represents unqualified；Dial plate is observed when unqualified and shows numerical value, if in deviation range, then it represents that cable still closes
Otherwise lattice are rejected product.
With reference to the working principle of the invention that attached drawing 2 indicates, circuit of the present invention includes input circuit, rectification circuit, compares
Circuit, amplifying circuit and output display circuit.
Input circuit is connected to cable under test by port A, port B, and port A is connected to power supply, port B by potentiometer R '
Pass through resistance R0Ground connection, because the resistance value of circuit under test is small, to guarantee the voltage loaded on cable under test without departing from three pole of input terminal
The pressure voltage range of pipe, is adjusted by potentiometer R '；Input circuit is electric using the differential amplification of double-width grinding Single-end output
Road, input resistance is big, differential mode amplification factor is big, common mode amplification factor is small, and input terminal is high pressure resistant and can complete level conversion.Three
Pole pipe T1And T2Collector connection, T1Base connections mouth A, T2Base connections mouth B, T1Emitter connecting triode
T3Emitter, T2Emitter connect T4Emitter, T3And T4Base stage connection；T3Collector and T6Collector connect
It connects, T4Collector and T7Collector connection, T6And T7Base stage interconnection, T6Pass through resistance R1Ground connection, T7Pass through resistance R3It connects
Ground；T3With T6Connected collector again with T5Base stage be connected, T5Emitter and T6And T7Connected base stage connection passes through electricity again
Hinder R2Ground connection, T5Collector access voltage；Triode T1And T2The collector and T of connection10Collector connection, T10And T11
Base stage be connected after again with T10Collector connection, T10And T11Emitter connect power supply, T11Collector be connected to T3And T4
Connected base stage on；In input circuit, T5And T6Respectively as T3And T4Active load, and T4It is used as T again6It is active negative
It carries, T4With T7Input terminal of the one end as rectification circuit is drawn on connected collector.The resistance of input circuit of the present invention is big, poor
Mould amplification factor is big, and common mode amplification factor is small, and Input voltage terminal is high pressure resistant and can complete level conversion i.e. to " ground " output.
Rectification circuit, including four connections diode D annular in shape1、D2、D3、D4, diode D1Cathode and D4Anode
Connect the output end of input circuit, diode D1Anode connect D2Anode, D4Cathode connect D3Cathode, D2Cathode and
D3Anode connection after be grounded, diode D1Anode and D2Anode connection after extraction and D4Cathode and D3Cathode connection
Extraction connection after as rectification circuit output end and be connected to comparison circuit.
Comparison circuit includes comparator V, and the output of the normal phase input end connection rectification circuit of comparator V, comparator V's is negative
Phase input terminal passes through resistance R5It is connected to power supply, the normal phase input end of comparator V passes through resistance R4It is connected to ground wire, comparator V's
Output passes through feedback resistance R6It is connected to normal phase input end, the output of comparator V connects display circuit.The threshold value of comparator V
It is determined as U according to the voltage value of actually required load, then the voltage drop on cable under test must not be lost more than 20% i.e. by standard
To guarantee qualification rate certain deviation range can be improved, but not allowed minus deviation in the minimum 0.8U of the voltage value measured.This reality
It applies in example, criterion of acceptability is set to 0.8U, threshold value is formulated according to 0.8U criterion of acceptability.It is set when the input terminal of comparison circuit is greater than
When fixed threshold value, comparator trigger action issues output signal and is input to amplifying circuit.
Amplifying circuit, including at least one level amplifying circuit, the present embodiment use level-one amplifying circuit, including triode T8With
T9The composite amplifier of composition, triode T8Base stage pass through resistance R7Connect the output of comparison circuit, T8Emitter and T9
Base stage connection, T8Collector and T9Collector connection after and be connected to power supply, T9Emitter pass through resistance R9Ground connection, T8
With T9Output of the collector of connection as amplifying circuit.The output of comparison circuit is amplified electricity by least one level by amplifying circuit
Road amplifies output, so that display electric current movement.
Display circuit, including LED light and ammeter, LED light are arranged in T8、T9Collector on, ammeter and resistance R10
It is arranged in parallel after series connection at the both ends of amplifying circuit, or access voltmeter directly in parallel.After amplifying circuit conducting, on collector
LED light conducting shines, and expression cable under test is qualified product；Ammeter shows numerical value, and ammeter numerical value is passed through resistance by the present invention
R10Effect switch to show voltage value, and whether qualified show by its dial plate numerical value, is qualification in 0.8U range above.
It is worth noting that, when there is indicator light and does not work in cable under test detection, it may be possible to since cable under test open circuit causes,
Be also likely to be that resistance value is excessive to cause comparison circuit to be failure to actuate to cause, dial plate show value is also all zero at this time, although though at this time what
Kind reason, cable under test is all substandard product, but since its subsequent treatment process is different, needs to further discriminate between this:
When there is indicator light and dial plate is not shown, the resistance value of potentiometer is gradually turned down, if indicator light and dial plate are not shown always
When, then it represents that cable under test is open circuit.
Working principle: by the both ends access binding post of cable under test, A is connect with binding post A ', B and B ' connection, closure
Switch connection detection circuit, cable under test conducting flow through electric current, the differential amplifier circuit as double-width grinding Single-end output it is defeated
Enter, differential amplifier circuit is with triode T3、T4、T5、T6And T7The current source current of composition is load, is exported after inhibiting common-mode signal
To finishing circuit；Rectification circuit rectifies input signal, and diphase signal is rectified into monophasic pulses, rectifies when positive signal flows into
When circuit, pass through diode D4And diode D3One-way conduction so that signal flow to comparison circuit, when positive signal stream
When entering rectification circuit, pass through diode D1And diode D2One-way conduction so that signal flow to comparison circuit, therefore compare
It will received always be positive phase signals compared with circuit；The positive input of comparison circuit receives signal, and with the gate valve value of setting into
Row compare, if more than setting gate valve value when, comparator export high level, be attached thereto amplifying circuit conducting, if be less than set
When the gate valve value set, comparator exports low level, the amplifying circuit cut-off being attached thereto；The comparison circuit of conducting exports high level
And amplifying circuit is triggered, through level-one by triode T8、T9The compound transistor amplifying circuit of composition amplifies, and refers to drive
Show that lamp is lighted；LED light conducting luminescence display on amplifying circuit collector, the ammeter being arranged in parallel with amplifying circuit are set
It shows and is shown on dial plate as voltage signal；If access cable closure switch dial plate is shown without numerical value and indicator light does not work,
Potentiometric resistance value is adjusted, if indicator light does not work always and dial plate is always without numerical value, shows certain inside the cable just detected
Place disconnects, if adjusting, rear indicator light is bright always and dial plate has numerical value to show always, shows inside positive detection cable without breaking feelings
Condition but this circuit are the exceeded unqualified cable of voltage drop.
The foregoing is only a preferred embodiment of the present invention, is not intended to restrict the invention, for the skill of this field
For art personnel, the invention may be variously modified and varied.All within the spirits and principles of the present invention, made any to repair
Change, equivalent replacement, improvement etc., should all be included in the protection scope of the present invention.
Claims (6)
1. a kind of fire electricity line detection device, for detecting the voltage drop of fire electricity line, it is characterised in that including input circuit, whole
Current circuit, comparison circuit, amplifying circuit and output display circuit；Wherein,
Input circuit accesses cable under test, port A connecting triode T by port A, port B1Base stage and pass through potentiometer R1
It is connected to power supply, port B connecting triode T2Base stage and pass through resistance R0Ground connection, using triode T1And T2The both-end of composition
Input the differential amplifier circuit of Single-end output, triode T4Collector as output end；
Rectification circuit, including four connections diode D annular in shape1、D2、D3、D4, diode D1Cathode and D4Anode connection
The output end of input circuit, diode D1Anode connect D2Anode, D4Cathode connect D3Cathode, D2Cathode and D3's
It is grounded after anode connection, diode D1Anode and D2Anode connection after extraction and D4Cathode and D3Cathode connection
Draw the output end after connecting as rectification circuit；
Comparison circuit, including comparator V, the output end of the normal phase input end connection rectification circuit of comparator V, comparator V's is negative
Phase input terminal passes through resistance R5It is connected to power supply, the normal phase input end of comparator V passes through resistance R4It is connected to ground wire, comparator V's
Output passes through feedback resistance R6Be connected to normal phase input end, the threshold value of comparator V according to actually required determination, comparator V's
Export the output end as comparison circuit；
Amplifying circuit, including at least one level amplifying circuit, including triode T8And T9The composite amplifier of composition, triode T8
Base stage pass through resistance R7Connect the output of comparison circuit, T8Emitter and T9Base stage connection, T8Collector and T9Collection
After electrode connection and it is connected to power supply, T9Emitter pass through resistance R9Ground connection, T8With T9The collector of connection is as amplifying circuit
Output end；
Triode T is arranged in amplifying circuit in display circuit, including LED light and ammeter, LED light8、T9Collector output
On, ammeter and resistance R10It is arranged in parallel after series connection at the both ends of amplifying circuit.
2. a kind of fire electricity line detection device according to claim 1, it is characterised in that: further include in the input circuit
Current source current, current source current include triode T3、T4、T5、T6And T7；It is also protected in input circuit and includes active circuit as difference
The load of amplifying circuit, active circuit include triode T10And T11。
3. a kind of fire electricity line detection device according to claim 2, it is characterised in that: in the differential amplifier circuit,
Triode T1And T2Collector connection, T1Base connections mouth A, T2Base connections mouth B, T1Emitter connect three poles
Pipe T3Emitter, T2Emitter connect T4Emitter, T3And T4Base stage connection；T3Collector and T6Collector connect
It connects, T4Collector and T7Collector connection, T6And T7Base stage interconnection, T6Pass through resistance R1Ground connection, T7Pass through resistance R3It connects
Ground；T3With T6Connected collector again with T5Base stage be connected, T5Emitter and T6And T7Connected base stage connection passes through electricity again
Hinder R2Ground connection, T5Collector access voltage；Triode T1And T2The collector and T of connection10Collector connection, T10And T11
Base stage be connected after again with T10Collector connection, T10And T11Emitter connect power supply, T11Collector be connected to T3And T4
Connected base stage on.
4. a kind of fire electricity line detection device according to claim 1, it is characterised in that: the comparison in the comparison circuit
The threshold value of device V is 0.8 times of its practical added detection voltage value U carried, i.e. 0.8U.
5. a kind of fire electricity line detection device according to claim 1, it is characterised in that: at least one level amplifying circuit
In, amplifying circuit replaces triode device using cmos device.
6. a kind of fire electricity line detection device according to claim 1, it is characterised in that: the amplifying circuit both ends are direct
Parallel connection access voltmeter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811135183.2A CN109270391B (en) | 2018-09-28 | 2018-09-28 | Fire-fighting cable detection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811135183.2A CN109270391B (en) | 2018-09-28 | 2018-09-28 | Fire-fighting cable detection device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109270391A true CN109270391A (en) | 2019-01-25 |
| CN109270391B CN109270391B (en) | 2020-11-27 |
Family
ID=65198539
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811135183.2A Active CN109270391B (en) | 2018-09-28 | 2018-09-28 | Fire-fighting cable detection device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109270391B (en) |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN87216917U (en) * | 1987-12-25 | 1988-11-02 | 马国强 | Induction-type in situ qualitative break wire detector |
| CN2195099Y (en) * | 1994-05-11 | 1995-04-19 | 鞍山钢铁公司 | Cable core break tester |
| CN201681132U (en) * | 2010-05-04 | 2010-12-22 | 四川新东方电缆集团有限公司 | Rubber sleeve cable break circuit fast detector |
| CN102253312A (en) * | 2011-06-01 | 2011-11-23 | 刘喆 | Cable breakage detector |
| CN102269791A (en) * | 2011-04-27 | 2011-12-07 | 兰州交通大学 | Online monitoring and positioning method of railway signal cable disconnection fault |
| CN204228875U (en) * | 2014-10-30 | 2015-03-25 | 黄月华 | Path break circuit fast detector |
| CN104730410A (en) * | 2015-03-16 | 2015-06-24 | 王金泽 | Distribution line breakage monitoring method and device based on voltage and current vectors |
| CN104991164A (en) * | 2015-06-23 | 2015-10-21 | 中国电子科技集团公司第七研究所 | Cable on-line detector |
| CN205027852U (en) * | 2015-08-14 | 2016-02-10 | 周云侠 | Electric wire breakpoint detector |
-
2018
- 2018-09-28 CN CN201811135183.2A patent/CN109270391B/en active Active
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN87216917U (en) * | 1987-12-25 | 1988-11-02 | 马国强 | Induction-type in situ qualitative break wire detector |
| CN2195099Y (en) * | 1994-05-11 | 1995-04-19 | 鞍山钢铁公司 | Cable core break tester |
| CN201681132U (en) * | 2010-05-04 | 2010-12-22 | 四川新东方电缆集团有限公司 | Rubber sleeve cable break circuit fast detector |
| CN102269791A (en) * | 2011-04-27 | 2011-12-07 | 兰州交通大学 | Online monitoring and positioning method of railway signal cable disconnection fault |
| CN102253312A (en) * | 2011-06-01 | 2011-11-23 | 刘喆 | Cable breakage detector |
| CN204228875U (en) * | 2014-10-30 | 2015-03-25 | 黄月华 | Path break circuit fast detector |
| CN104730410A (en) * | 2015-03-16 | 2015-06-24 | 王金泽 | Distribution line breakage monitoring method and device based on voltage and current vectors |
| CN104991164A (en) * | 2015-06-23 | 2015-10-21 | 中国电子科技集团公司第七研究所 | Cable on-line detector |
| CN205027852U (en) * | 2015-08-14 | 2016-02-10 | 周云侠 | Electric wire breakpoint detector |
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| Publication number | Publication date |
|---|---|
| CN109270391B (en) | 2020-11-27 |
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