CN204882690U - Non - touch voltage detection instrument - Google Patents
Non - touch voltage detection instrument Download PDFInfo
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- CN204882690U CN204882690U CN201520609476.5U CN201520609476U CN204882690U CN 204882690 U CN204882690 U CN 204882690U CN 201520609476 U CN201520609476 U CN 201520609476U CN 204882690 U CN204882690 U CN 204882690U
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Abstract
The utility model provides a non - touch voltage detection instrument, including voltage sense module, microcontroller and sensitivity display module, the voltage sense module is used for the response to need the voltage that detects to output induced voltage to microcontroller, microcontroller is used for measuring induced voltage's size to according to induced voltage's the inside gain amplifier of size regulation microcontroller, with the sensitivity of adjusting non - touch voltage detection instrument, a corresponding control signal to sensitivity display module is sent in sensitivity according to adjusting, the sensitivity display module is used for the corresponding sensitivity sign of sensitivity with the regulation according to a control signal display. The utility model discloses can realize the automatically regulated of non - touch voltage detection instrument sensitivity, and make the user can detect the voltage of different intensity according to current non - touch voltage detection instrument detection voltage's sensitivity to utilize functions such as the next trend that realizes differentiation live wire, zero line simultaneously and look for the live wire of non - touch voltage detection instrument, judgement live wire breakpoint.
Description
Technical field
The utility model relates to electric measurement field, particularly relates to a kind of non-contact voltage detection instrument.
Background technology
Existing non-contact voltage detection instrument sensitivity set-up mode is more single, and needs to arrange manually, as being arranged to single low sensitivity mode or high sensitivity pattern carries out alternating voltage detection.And under low sensitivity mode, although live wire, zero line can be distinguished, due to the change of less voltage power cannot be sensed, user cannot utilize the non-contact voltage detection instrument under low sensitivity mode realize finding live wire trend, judge the functions such as live wire breakpoint; Under high sensitivity pattern, although less voltage power change effectively can be sensed, the trend of searching live wire can be realized, judge the functions such as live wire breakpoint, but the alternating voltage that None-identified is stronger, user cannot utilize the non-contact voltage detection instrument under high sensitivity pattern to distinguish live wire, zero line.Therefore, existing non-contact voltage detection instrument due to cannot arrange flexibly sensitivity cause user cannot utilize non-contact voltage detection instrument realize simultaneously distinguish live wire, zero line and find live wire trend, judge the functions such as live wire breakpoint.
Utility model content
Fundamental purpose of the present utility model is to provide a kind of non-contact voltage detection instrument, is intended to realize automatically regulating sensitivity, with distinguish simultaneously live wire, zero line and find live wire trend, judge live wire breakpoint etc.
In order to achieve the above object, the utility model proposes a kind of non-contact voltage detection instrument, comprise voltage induced module, microcontroller and sensitivity display module, described voltage induced module is connected with the input end of described microcontroller, and the first output terminal of described microcontroller is connected with described sensitivity display module;
Described voltage induced module for responding to the voltage that need detect, and exports induced voltage to described microcontroller;
Described microcontroller for measuring the size of described induced voltage, and according to the size adjustment of described induced voltage the gain amplifier of microcontroller, to regulate the sensitivity of non-contact voltage detection instrument; Send corresponding first according to the sensitivity regulated and control signal to described sensitivity display module;
Described sensitivity display module is used for the sensitivity corresponding with the sensitivity regulated according to described first control signal display and identifies, and knows that current non-contact voltage detection instrument detects the sensitivity of voltage for user.
Preferably, described voltage induced module comprises induction antenna, the first resistance, the second resistance and the 3rd resistance, and one end of described induction antenna is unsettled, and the other end of described induction antenna connects the input end of described microcontroller through described first resistance; One end after described second resistance and the 3rd resistant series is connected between described induction antenna and described first resistance, the other end ground connection after described second resistance and the 3rd resistant series.
Preferably, described sensitivity display module comprises the first power supply and some display circuits, described first output terminal comprises some first output ports, each display circuit comprises the first light emitting diode and the 4th resistance, the anode of described first light emitting diode is connected with described first power supply through described 4th resistance, and the negative electrode of described first light emitting diode connects with the first corresponding output port.
Preferably, described non-contact voltage detection instrument also comprises the hummer sounding module be connected with the second output terminal of described microcontroller, the second control signal that described hummer sounding module sends according to the sensitivity regulated for receiving described microcontroller, and send the frequency acoustic corresponding with the sensitivity regulated according to described second control signal.
Preferably, described hummer sounding module comprises hummer, second light emitting diode, triode, second power supply, 5th resistance, 6th resistance and the 7th resistance, wherein: the base stage of described triode is connected with the second output terminal of described microcontroller through described 7th resistance, the grounded emitter of described triode, the collector of described triode is connected with the negative electrode of described second light emitting diode, the anode of described second light emitting diode is through described 5th resistance, described 6th resistance is connected with one end of described hummer, the other end of described hummer is connected with the negative electrode of described second light emitting diode, described second power supply is connected between described 5th resistance and described 6th resistance.
Preferably, described triode is NPN type triode.
Preferably, described non-contact voltage detection instrument also comprises the lighting module be connected with the external interrupt end of described microcontroller, described lighting module comprises button, the 3rd light emitting diode and the 8th resistance, described external interrupt end comprises the first external interrupt port and the second external interrupt port, described first external interrupt port is through described button ground connection, described second external interrupt port is connected through the anode of described 8th resistance with described 3rd light emitting diode, the plus earth of described 3rd light emitting diode.
Preferably, described non-contact voltage detection instrument also comprises filter capacitor, and one end of described filter capacitor is connected with the program voltage input end of described microcontroller, the other end ground connection of described filter capacitor.
A kind of non-contact voltage detection instrument that the utility model proposes, carrys out the induced voltage size of measuring voltage induction module input by microcontroller, and the sensitivity of size adjustment non-contact voltage detection instrument according to described induced voltage; Meanwhile, the sensitivity controlling the display of sensitivity display module corresponding with the sensitivity regulated identifies, and knows that current non-contact voltage detection instrument detects the sensitivity of voltage for user.Thus realize the automatic adjustment of non-contact voltage detection instrument sensitivity, and the sensitivity making user can detect voltage according to current non-contact voltage detection instrument detect the voltage of varying strength, thus the trend utilizing non-contact voltage detection instrument simultaneously to realize distinguishing live wire, zero line and finding live wire, judge the functions such as live wire breakpoint.
Accompanying drawing explanation
Fig. 1 is the structured flowchart of the utility model preferred embodiment non-contact voltage detection instrument;
Fig. 2 is the circuit diagram of the utility model preferred embodiment non-contact voltage detection instrument.
In order to make the technical solution of the utility model clearly, understand, be described in further detail below in conjunction with accompanying drawing.
Embodiment
With reference to the structural representation that Fig. 1, Fig. 1 are the utility model preferred embodiment non-contact voltage detection instruments.
The utility model preferred embodiment proposes a kind of non-contact voltage detection instrument, described non-contact voltage detection instrument comprises voltage induced module 1, microcontroller 2 (MicrocontrollerUnit, be called for short MCU) and sensitivity display module 3, voltage induced module 1 is connected with the input end of microcontroller 2, and the first output terminal of microcontroller 2 is connected with sensitivity display module 3; Voltage induced module 1 for responding to the voltage that need detect, and exports induced voltage to microcontroller 2; Microcontroller 2 is for measuring the size of described induced voltage, and the gain amplifier of size adjustment microcontroller 2 inside according to described induced voltage, to regulate the sensitivity of non-contact voltage detection instrument; Send corresponding first according to the sensitivity regulated and control signal to sensitivity display module 3; Sensitivity display module 3 identifies for the sensitivity corresponding with the sensitivity regulated according to described first control signal display, knows that current non-contact voltage detection instrument detects the sensitivity of voltage for user.
In the present embodiment microcontroller 2 receive voltage induced module 1 detect induced voltage as ac voltage signal time, measure the size of this induced voltage, and judge whether to need to carry out adjustment of sensitivity according to the size of this induced voltage.In the present embodiment, microcontroller 2 inside can arrange corresponding induced voltage scope for different sensitivity in advance, as the sensitivity when non-contact voltage detection instrument comprises height, in, during low third gear, height is set, in, the voltage swing scope that low third gear sensitivity is corresponding different, when induced voltage falls into voltage swing scope corresponding to high sensitivity, illustrate that current induced voltage is on the weak side, non-contact voltage detection instrument need be regulated to be high sensitivity, then heighten the gain factor of microcontroller 2 internal gain amplifier, effectively to detect more weak induced voltage and change in voltage, for realizing the trend as found live wire, judge that the functions such as live wire breakpoint lay the first stone.When induced voltage falls into voltage swing scope corresponding to muting sensitivity, illustrate that current induced voltage is partially strong, non-contact voltage detection instrument need be regulated to be muting sensitivity, then turn down the gain factor of microcontroller 2 internal gain amplifier, effectively to detect stronger induced voltage and change in voltage, for realizing laying the first stone as distinguished the function such as live wire, zero line.
In the present embodiment microcontroller 2 be adjusted to according to large young pathbreaker's non-contact voltage detection instrument of this induced voltage height, in or after muting sensitivity, also show the sensitivity corresponding with the sensitivity regulated identify by controlling sensitivity display module 3, sensitivity display module 3 distinguishes the different sensitivity of display current non-contact voltage detection instrument detection voltage by the such as mode such as liquid crystal display, luminescence display.Like this, user can know that current non-contact voltage detection instrument detects the sensitivity of voltage, and when needing the trend of realization as searching live wire, judging the functions such as live wire breakpoint, utilize highly sensitive non-contact voltage detection instrument effectively to detect more weak induced voltage and change in voltage; When needs realize as distinguished the function such as live wire, zero line, utilize the non-contact voltage detection instrument of muting sensitivity effectively to detect stronger induced voltage and change in voltage, thus utilize non-contact voltage detection instrument realize simultaneously distinguish live wire, zero line and find live wire trend, judge the functions such as live wire breakpoint.
The present embodiment carrys out by microcontroller 2 the induced voltage size that measuring voltage induction module 1 inputs, and the sensitivity of size adjustment non-contact voltage detection instrument according to described induced voltage; Meanwhile, the sensitivity controlling the display of sensitivity display module 3 corresponding with the sensitivity regulated identifies, and knows that current non-contact voltage detection instrument detects the sensitivity of voltage for user.Thus realize the automatic adjustment of non-contact voltage detection instrument sensitivity, and the sensitivity making user can detect voltage according to current non-contact voltage detection instrument detect the voltage of varying strength, thus the trend utilizing non-contact voltage detection instrument simultaneously to realize distinguishing live wire, zero line and finding live wire, judge the functions such as live wire breakpoint.
Shown in composition graphs 2, Fig. 2 is the circuit diagram of the utility model preferred embodiment non-contact voltage detection instrument.
In the utility model preferred embodiment, the microcontroller 2 i.e. model of single-chip microcomputer is preferably SD8000T, described single-chip microcomputer SD8000T comprises input end, the first output terminal, the second output terminal, external interrupt end and program voltage input end, the pin AIP of described single-chip microcomputer SD8000T is input end, pin SEG2/P36, SEG3/P37 of described single-chip microcomputer SD8000T ... SEG11/P47 is the first output terminal, pin P25/SEG12/BUZ is the second output terminal, pin P20/INT0, P21/INT1 are external interrupt end, and pin VPP is program voltage input end.
Particularly, voltage induced module 1 comprises induction antenna 11, first resistance R1, the second resistance R2 and the 3rd resistance R3, and one end a of induction antenna 11 is unsettled, and the other end b of induction antenna 11 connects input end and the pin AIP of microcontroller 2 through the first resistance R1; One end after second resistance R2 and the 3rd resistance R3 connects is connected between induction antenna 11 and the first resistance R1, the other end ground connection after the second resistance R2 and the 3rd resistance R3 connects.Respond to the voltage that need detect by induction antenna 11 in the present embodiment, adopt contactless inducing method to measure the alternating voltage in circuit-under-test, safer compared to traditional contact.
Sensitivity display module 3 comprises the first power supply VDD1 and some display circuits 31, described first output terminal comprises some first output ports, each display circuit 31 comprises the first light emitting diode D1 and the 4th resistance R4, the anode of the first light emitting diode D1 is connected with the first power supply VDD1 through the 4th resistance R4, and the negative electrode of the first light emitting diode D1 connects with the first corresponding output port such as pin SEG11/P47.It should be noted that, in the present embodiment, the division degree of the sensitivity that the quantity of display circuit 31 can regulate according to non-contact voltage detection instrument is arranged, as three display circuits 31 can be arranged according to the high, medium and low third gear of sensitivity, also can increase and decrease accordingly.
Further, described non-contact voltage detection instrument also can comprise the hummer sounding module 4 be connected with the second output terminal of microcontroller 2 and pin P25/SEG12/BUZ, the second control signal that hummer sounding module 4 sends according to the sensitivity regulated for receiving microcontroller 2, and send the frequency acoustic corresponding with the sensitivity regulated according to described second control signal.
Hummer sounding module 4 comprises hummer LS1, second light emitting diode D2, triode Q1, second power supply VDD2, 5th resistance R5, 6th resistance R6 and the 7th resistance R7, wherein: triode Q1 is preferably NPN type triode, the base stage of triode Q1 is connected with the pin P25/SEG12/BUZ of microcontroller 2 through the 7th resistance R7, the grounded emitter of triode Q1, the collector of triode Q1 is connected with the negative electrode of the second light emitting diode D2, the anode of the second light emitting diode D2 is through the 5th resistance R5, 6th resistance R6 is connected with one end of hummer LS1, the other end of hummer LS1 is connected with the negative electrode of the second light emitting diode D2, second power supply VDD2 is connected to R6 between the 5th resistance R5 and the 6th resistance.
Further, described non-contact voltage detection instrument also can comprise the lighting module 5 be connected with the external interrupt end of microcontroller 2, lighting module 5 comprises button S2, the 3rd light emitting diode D3 and the 8th resistance R8, described external interrupt end comprises the first external interrupt port and pin P20/INT0 and the second external interrupt port and pin P21/INT1, pin P20/INT0 is through button S2 ground connection, pin P21/INT1 is connected with the anode of the 3rd light emitting diode D3 through the 8th resistance R8, the plus earth of the 3rd light emitting diode D3.In the present embodiment, user is when using non-contact voltage detection instrument, if non-contact voltage detection instrument need be utilized to carry out flashlight lighting subsidiary function, can be pushed button S2, the pin P20/INT0 normality of microcontroller 2 is noble potential, when user pushes button S2, microcontroller 2 detects that pin P20/INT0 becomes electronegative potential, then identify the button operation of user, then export high level by pin P21/INT1, make the 3rd light emitting diode D3 forward conduction, utilize the continuous illumination of the 3rd light emitting diode D3 to be supplied to user's flashlight illumination function.When user pushes button S2 again, by pin P21/INT1 output low level, the 3rd light emitting diode D3 is ended, close flashlight illumination function, very convenient.
Further, described non-contact voltage detection instrument also can comprise filter capacitor C, and one end of filter capacitor C is connected with the program voltage input end of microcontroller 2 and pin VPP, the other end ground connection of filter capacitor C.In the present embodiment, filtering process can be carried out, the interference of filtering alternating voltage when single-chip microcomputer SD8000T works to the program voltage of input by filter capacitor C, be conducive to the steady operation of single-chip microcomputer SD8000T.
In the present embodiment, induction antenna 11 responds to the voltage that need detect, and produces induced voltage on the second resistance R2, the 3rd resistance R3.After single-chip microcomputer SD8000T receives this induced voltage by pin AIP, measure the size of this induced voltage, according to the gain factor of the gain amplifier of its inside of size adjustment of this induced voltage, non-contact voltage detection instrument is adjusted to different gear sensitivity as high, medium and low sensitivity.After single-chip microcomputer SD8000T has regulated different gear sensitivity, can to the pin SEG2/P36 connecting display circuit 31, SEG3/P37 ... SEG11/P47 sends corresponding first control signal, as worked as, non-contact voltage detection instrument is adjusted to low-grade sensitivity, and the display circuit 31 that low-grade sensitivity correspondence is preset is when being connected with pin SEG11/P47, then pin SEG11/P47 is placed in low level state by single-chip microcomputer SD8000T, in the display circuit 31 be then connected with pin SEG11/P47, the first light emitting diode D1 conducting is luminous, by the luminance of the first light emitting diode D1, user can know that the sensitivity of current non-contact voltage detection instrument detection voltage is low-grade sensitivity state, the non-contact voltage detection instrument of low-grade sensitivity then can be utilized to detect stronger induced voltage and change in voltage, realize as distinguished live wire, the functions such as zero line.And, in the present embodiment, after single-chip microcomputer SD8000T has regulated different gear sensitivity, also by sending the second control signal to pin P25/SEG12/BUZ to control the sound that hummer LS1 sends different frequency.As PWM can be utilized to export Direct driver, I/O timing trigging signal also can be utilized to produce drive waveforms hummer LS1 is driven.Wherein, it is utilize PWM delivery outlet itself can export certain square wave to carry out Direct driver hummer LS1 that PWM exports Direct driver, is produced the square wave of different frequency by the dutycycle, cycle etc. arranging PWM mouth output waveform.And utilize I/O timing trigging signal to be utilize timer to do timing to produce drive waveforms, the square wave of different frequency is produced by timing trigging signal.After single-chip microcomputer SD8000T has regulated different gear sensitivity, after the mode driven by PWM output Direct driver or the generation of I/O timing trigging signal produces the square wave of the corresponding frequency of sensitivity regulated with current non-contact voltage detection instrument, being amplified by triode Q1 more just to drive hummer LS1 to send the sound of corresponding frequencies, like this, for the different gear sensitivity that single-chip microcomputer SD8000T regulates, hummer LS1 can be driven to send the sound of different frequency, thus make user can know that current non-contact voltage detection instrument detects the sensitivity gear of voltage according to different frequency sound, convenient, practical.
The foregoing is only preferred embodiment of the present utility model; not thereby the scope of the claims of the present utility model is limited; every utilize the utility model instructions and accompanying drawing content to do equivalent structure or flow process conversion; or be directly or indirectly used in other relevant technical field, be all in like manner included in scope of patent protection of the present utility model.
Claims (8)
1. a non-contact voltage detection instrument, it is characterized in that, comprise voltage induced module, microcontroller and sensitivity display module, described voltage induced module is connected with the input end of described microcontroller, and the first output terminal of described microcontroller is connected with described sensitivity display module;
Described voltage induced module for responding to the voltage that need detect, and exports induced voltage to described microcontroller;
Described microcontroller for measuring the size of described induced voltage, and according to the size adjustment of described induced voltage the gain amplifier of microcontroller, to regulate the sensitivity of non-contact voltage detection instrument; Send corresponding first according to the sensitivity regulated and control signal to described sensitivity display module;
Described sensitivity display module is used for the sensitivity corresponding with the sensitivity regulated according to described first control signal display and identifies, and knows that current non-contact voltage detection instrument detects the sensitivity of voltage for user.
2. non-contact voltage detection instrument according to claim 1, it is characterized in that, described voltage induced module comprises induction antenna, the first resistance, the second resistance and the 3rd resistance, one end of described induction antenna is unsettled, and the other end of described induction antenna connects the input end of described microcontroller through described first resistance; One end after described second resistance and the 3rd resistant series is connected between described induction antenna and described first resistance, the other end ground connection after described second resistance and the 3rd resistant series.
3. non-contact voltage detection instrument according to claim 1, it is characterized in that, described sensitivity display module comprises the first power supply and some display circuits, described first output terminal comprises some first output ports, each display circuit comprises the first light emitting diode and the 4th resistance, the anode of described first light emitting diode is connected with described first power supply through described 4th resistance, and the negative electrode of described first light emitting diode connects with the first corresponding output port.
4. non-contact voltage detection instrument according to claim 1, it is characterized in that, also comprise the hummer sounding module be connected with the second output terminal of described microcontroller, the second control signal that described hummer sounding module sends according to the sensitivity regulated for receiving described microcontroller, and send the frequency acoustic corresponding with the sensitivity regulated according to described second control signal.
5. non-contact voltage detection instrument according to claim 4, it is characterized in that, described hummer sounding module comprises hummer, second light emitting diode, triode, second power supply, 5th resistance, 6th resistance and the 7th resistance, wherein: the base stage of described triode is connected with the second output terminal of described microcontroller through described 7th resistance, the grounded emitter of described triode, the collector of described triode is connected with the negative electrode of described second light emitting diode, the anode of described second light emitting diode is connected with one end of described hummer with the 6th resistance through described 5th resistance, the other end of described hummer is connected with the negative electrode of described second light emitting diode, described second power supply is connected between described 5th resistance and described 6th resistance.
6. non-contact voltage detection instrument according to claim 5, is characterized in that, described triode is NPN type triode.
7. non-contact voltage detection instrument according to claim 1, it is characterized in that, also comprise the lighting module be connected with the external interrupt end of described microcontroller, described lighting module comprises button, the 3rd light emitting diode and the 8th resistance, described external interrupt end comprises the first external interrupt port and the second external interrupt port, described first external interrupt port is through described button ground connection, described second external interrupt port is connected through the anode of described 8th resistance with described 3rd light emitting diode, the plus earth of described 3rd light emitting diode.
8. non-contact voltage detection instrument according to claim 1, is characterized in that, also comprise filter capacitor, and one end of described filter capacitor is connected with the program voltage input end of described microcontroller, the other end ground connection of described filter capacitor.
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| CN201520609476.5U CN204882690U (en) | 2015-08-13 | 2015-08-13 | Non - touch voltage detection instrument |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2017107556A1 (en) * | 2015-12-25 | 2017-06-29 | 深圳长城开发科技股份有限公司 | Electricity meter and live wire detection circuit |
| CN108072783A (en) * | 2016-11-11 | 2018-05-25 | 弗兰克公司 | Use the contactless voltage measurement system of reference signal |
| CN108761180A (en) * | 2018-06-28 | 2018-11-06 | 深圳市华博精测科技有限公司 | Non-contact voltage Probing pen |
| CN110609199A (en) * | 2019-09-16 | 2019-12-24 | 优利德科技(中国)股份有限公司 | Zero-line and live-line detection and identification method, device and system |
| CN110632364A (en) * | 2019-09-16 | 2019-12-31 | 优利德科技(中国)股份有限公司 | Non-contact voltage detection device, plug-in structure and method |
-
2015
- 2015-08-13 CN CN201520609476.5U patent/CN204882690U/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2017107556A1 (en) * | 2015-12-25 | 2017-06-29 | 深圳长城开发科技股份有限公司 | Electricity meter and live wire detection circuit |
| CN108072783A (en) * | 2016-11-11 | 2018-05-25 | 弗兰克公司 | Use the contactless voltage measurement system of reference signal |
| CN108761180A (en) * | 2018-06-28 | 2018-11-06 | 深圳市华博精测科技有限公司 | Non-contact voltage Probing pen |
| CN110609199A (en) * | 2019-09-16 | 2019-12-24 | 优利德科技(中国)股份有限公司 | Zero-line and live-line detection and identification method, device and system |
| CN110632364A (en) * | 2019-09-16 | 2019-12-31 | 优利德科技(中国)股份有限公司 | Non-contact voltage detection device, plug-in structure and method |
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Effective date of registration: 20160905 Address after: 518110 Guangdong Province, Shenzhen city Longhua District Guanlan community Guangxi Yuelu scared Po tou building 3 floor second No. 306 Patentee after: SHENZHEN HUAYI INSTRUMENT CO., LTD. Address before: 518000 Guangdong Province, Shenzhen city Futian District road industry garden building C, 23F Patentee before: Gao Chao |
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Address after: 518000 Guangdong Province, Shenzhen city Longhua District Guanlan community Guangxi Yuelu scared Po tou building 3 floor second No. 306 Patentee after: Shenzhen Hua measurement Yizhi Polytron Technologies Inc Address before: 518110 Guangdong Province, Shenzhen city Longhua District Guanlan community Guangxi Yuelu scared Po tou building 3 floor second No. 306 Patentee before: SHENZHEN HUAYI INSTRUMENT CO., LTD. |
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Effective date of registration: 20190412 Address after: 541105 Yangtang Industrial Park, Lingui Town, Lingui District, Guilin City, Guangxi Zhuang Autonomous Region Patentee after: Guilin Huayi Intelligent Measurement Technology Co., Ltd. Address before: 518000 3rd floor, 2nd building, 306 Guiyue Road, Guanlan Beitou Community, Longhua New District, Shenzhen City, Guangdong Province Patentee before: Shenzhen Hua measurement Yizhi Polytron Technologies Inc |