CN208847788U - A kind of non-contact type high-voltage detecting device based on field strength distribution - Google Patents
A kind of non-contact type high-voltage detecting device based on field strength distribution Download PDFInfo
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- CN208847788U CN208847788U CN201821524971.6U CN201821524971U CN208847788U CN 208847788 U CN208847788 U CN 208847788U CN 201821524971 U CN201821524971 U CN 201821524971U CN 208847788 U CN208847788 U CN 208847788U
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Abstract
The utility model discloses a kind of non-contact type high-voltage detecting device based on field strength distribution, using STM32F103ZE series monolithic as central processing analysis and control unit, the high voltage electroscope further include electric-field sensor, signal processing circuit, Temperature and Humidity module, display module, acousto-optic warning module, by key control and hardware reset, the input side of signal processing circuit is connect with electric-field sensor.There is the feature of " near field region " in the magnetic field and electric field that are distributed around according to transmission line of electricity, and the electrostatic equilibrium feature of energized conductor in the electric field, at a distance from the induced current size in electromagnetic field can obtaining the size of electric field strength at measuring device by metallic conductor to obtain measuring device between alive circuit, and have electricity by the sending of acousto-optic warning module, without electrical signal status, show test point at a distance from route by display module.
Description
Technical field
The utility model relates to a kind of high voltage electroscopes more particularly to a kind of non-contact type high voltage based on field strength distribution to test
Electric appliance.
Background technique
Electric energy and the conversion of other energy are convenient, are suitable for mass production, centralized management, long distance conveying, automatically control, with its people
It is in close relations between economic each department.With the increasingly raising of China's economic level, the electricity consumption of people is sharply increased, voltage etc.
Grade also increases with it, and inside power supply system, a lot of staff occurs because of the accident of personal injury caused by electric shock, wherein leading
Will there are two types of electric shocks: one is the induced electricity electric shock in strong-electromagnetic field environment, another kind be direct accidentally touching high voltage alive equipment touching
Electricity finds that the number of getting an electric shock and dying accounts for the 6.54% of its whole death toll, wherein accidentally touching according to accident statistical analysis in recent years
Charging equipment causes the number of casualties most, has accounted for the 36% of injures and deaths total number of persons, while in electric shock casualty accident, about
60% forms legal dispute, brings huge economic loss and public opinion to negatively affect to power supplying and generating enterprises.
Therefore, it accurately calculates the electric field strength near route and designs the device of measurement power frequency electric field, it can be significantly
Reduce the generation of the above accident.
Insulating bar is usually used in traditional contact high voltage electroscope due to capable of expansion and contraction, average weight, easy to maintain, but
Be when closely electrically operated using insulating bar, operator often because operating distance is high, insulating bar is long, cause insulating bar fall bar encounter it is adjacent
Charging equipment causes the generation of staff's electric shock accidents.Therefore, a kind of novel non-contact high pressure breaking through traditional concept is tested
The development of electric appliance plays a crucial role in the safety operation of electric system.
Utility model content
In order to solve the above technical problems, the utility model provides a kind of non-contact type high-voltage detecting based on field strength distribution
Device.Examine whether it charges by field strength distribution around high-tension line and high-tension apparatus.
The technical solution adopted in the utility model:
A kind of non-contact type high-voltage detecting device based on field strength distribution, it is characterised in that: it includes as central processing point
Analysis and control unit single-chip microcontroller, further include the signal processing circuit being connect with the input side of single-chip microcontroller, Temperature and Humidity module,
By key control and hardware reset, the acousto-optic warning module and display module being connect with the outlet side of single-chip microcontroller, signal processing circuit
Input side connect with electric-field sensor,
Electric-field sensor, for reading the electric field signal near high-voltage line；
Signal processing circuit, the electric field signal of processing judgement input, sending have electricity, without electric two states signal；
Single-chip microcontroller will receive the signal that signal processing circuit is sent and identify that sending has electricity or without electric signal；
Acousto-optic warning module, sending has electricity or prompts without electricity voice and pass through signal lamp color after receiving the signal of single-chip microcontroller
The different states of different display routes；
Display module, for showing test point at a distance from route；
Temperature and Humidity module corrects the analysis result of electric field strength for detecting the temperature and humidity at scene.
Compared with prior art, the utility model has the beneficial effects that breaking through the idea of conventional contact high voltage electroscope, nothing
It high-tension line and high-tension apparatus need to be contacted just can detect it whether to charge and the size of the electric field strength of present apparatus position,
Using non-contacting form can be avoided because insulating bar it is too long caused by electric shock accidents generation；Using metallic conductor as electric field
Sensor, low in cost, other modules use common electronic device, facilitate purchase material；Increase Temperature and Humidity module to repair
Positive testing result, measurement are accurate；The high voltage electroscope integrated level of the utility model is high, small in size, light-weight, cheap, peace
It is complete convenient, it is easier to be widely used and popularize.
Detailed description of the invention
Fig. 1 is the principles of the present invention block diagram.
Fig. 2 is the circuit diagram of the utility model electric-field sensor.
Fig. 3 is the voltage doubling rectifing circuit figure of the utility model.
Fig. 4 is the differential amplifier circuit figure of the utility model.
Fig. 5 is the Schmitt trigger circuit figure of the utility model.
Fig. 6 a is the circuit diagram of the temperature sensor of the Temperature and Humidity module of the utility model.
Fig. 6 b is the circuit diagram of the humidity sensor of the Temperature and Humidity module of the utility model.
Wherein, 1, single-chip microcontroller, 2, electric-field sensor, 3, signal processing circuit, 4, Temperature and Humidity module, 5, display mould
Block, 6, acousto-optic warning module, 7, press key control, 8, hardware reset, 9, power interface.
Specific embodiment
In order to deepen the understanding to the utility model, with reference to the accompanying drawing and specific embodiment is described in detail, this
Embodiment described in specification is only used for explaining the utility model, is not used to limit the utility model.
Shown in Fig. 1, a kind of non-contact type high-voltage detecting device based on field strength distribution of the utility model is used
STM32F103ZE series monolithic 1 is analyzed as central processing and control unit, and integrated level is high, small in size, powerful,
The high voltage electroscope further includes electric-field sensor 2, signal processing circuit 3, Temperature and Humidity module 4, display module 5, acousto-optic police
Show module 6, by key control 7 and hardware reset 8, signal processing circuit 3, Temperature and Humidity module 4 are answered by key control 7 and hardware
Position 8 is connect with the input side of single-chip microcontroller 1, the outlet side company of acousto-optic warning module 6 and display module 5 and single-chip microcontroller 1, signal processing
The input side of circuit 3 is connect with electric-field sensor 2.Figure label 9 is the power interface of single-chip microcontroller 1.
Signal processing circuit 3 includes rectification amplifying circuit and Schmidt trigger, and the electric field signal near high-voltage line is by electricity
Field sensor 2 is read, and rectified amplifying circuit is sent into Schmidt trigger, and Schmidt trigger judges input signal,
Sending has electricity, without electric two states signal to single-chip microcontroller 1, and single-chip microcontroller 1 identifies the signal received, and sending has electricity or nothing
Electric signal is to acousto-optic warning module 6, and sending has electricity or prompts without electricity voice and pass through signal after acousto-optic warning module 6 receives signal
The different state of the different display routes of lamp color；Display module 5 shows test point at a distance from route, and display module 5 is ratio
More typical display screen, the electric field signal that electric-field sensor reads near high-tension line are amplified by differential amplifier circuit,
The signal being amplified is sent to single-chip microcontroller, can calculate circuit-under-test at a distance from test point by the program code of single-chip microcontroller,
To obtain a result and be shown by display screen.
Since electroscope is used for the measurement of high-tension apparatus, it is easy to be struck by lightning, the generation of lightning strike accident, adds in order to prevent
Protection of the upper varistor as electric-field sensor (shown in Fig. 2).The characteristic of varistor is exactly that it possesses a threshold voltage,
Under normal conditions, if the voltage at its both ends be less than threshold voltage, varistor is equivalent to open circuit, if but have be struck by lightning or
When person is electric discharge, the resistance at both ends will become smaller, and thus can protect subsequent member with voltage excessive in suppression circuit
Part.Meanwhile it added common mode inductance between two varistors and playing the role of filtering out common-mode signal on signal wire.
Rectification amplifying circuit includes voltage doubling rectifing circuit and differential amplifier circuit, voltage doubling rectifing circuit by multiple diodes and
Capacitor composition shown in Fig. 3, has diode D1, diode D2, diode D3, diode D4, diode D5, diode D6, tool
There are capacitor C1, capacitor C2, capacitor C3, capacitor C4, capacitor C5, capacitor C6, it can lower alternating voltage is lower with pressure resistance
Rectifier diode and capacitor, " whole " go out a higher DC voltage.
Voltage doubling rectifing circuit receives electric-field sensor AC signal and is converted into direct current signal, is transmitted to differential amplifier circuit
(shown in Fig. 4) is further processed.The emissivities of transmission line of electricity are very low, so the electricity induced by detecting element
Pressure and current signal are very small, according to the empty short and virtual segment principle of operational amplifier, can pass through and choose different resistance
Resistance value designs reasonable amplification factor, carries out high magnification amplification to signal.
Shown in Fig. 5, Schmidt trigger can play the role of transformation and rectification to the waveform in signal, will be slowly varying
Triangular wave or the signals such as sine wave become rectangular wave (i.e. low and high level) output so that electroscope circuit is more stable, triggering
Device judges that input signal, sending has electricity, without electric two kinds of signals, and finally whether there is or not the conclusions of electric signal to pass through acousto-optic warning mould
Block is shown on electroscope.
Therefore the measurement result that temperature and humidity variation in environment influences electric field strength is examined by Temperature and Humidity module 4
The temperature and humidity at scene is surveyed, the analysis result of electric field strength is further corrected.
Temperature and Humidity module 4 includes temperature sensor and humidity sensor, temperature sensing in temperature humidity sensor module 4
Device (Fig. 6 a) uses monobus DS18B20 digital temperature sensor, and temperature signal can be directly changed into serial digital signal confession
Processor is read, and monobus is to can connect multiple sensors on an IO line, and the method for distinguishing these sensors is exactly interior
64, portion ROM sequence number, the measurement range of DS18B20 sensor reach -55~+125 DEG C, corresponding 9~12 programmable point
Resolution, respectively 0.5 DEG C, 0.25 DEG C, 0.125 DEG C and 0.0625 DEG C, measurement accuracy is higher.Humidity sensor (Fig. 6 b) uses
DHT11 humidity sensor, DHT11 are also a kind of single bus sensor, and moisture measurement range is 20%~90%RH, and precision is
± 5.0%RH, but its temp sensing function is weaker, and temperature-measuring range is 0~+50 DEG C, and precision is ± 1.0 DEG C.Present design is using single
Bus Temperature Humidity Sensor easily expands sensor node number on demand.
The electric-field sensor of the utility model has " near field in the magnetic field and electric field being distributed around according to transmission line of electricity
The feature in area ", by the way that one is placed in the slow power frequency electric field of pace of change with the consistent long conductor of power line warp direction,
Due to electrostatic equilibrium, it will be induced in the two sides of nearly power line and remote power line respectively is influenced the positive and negative of changes in distribution by electric field
Charge, amount of charge carry out power frequency variation at any time, and charge density is respectively σ (t) and-σ (t), in which:
σ (t)=ε E (t)
Since charge moves left and right, long conductor induces alternating current i (t), in which:
The σ (t)=2 of i (t)=2 ε E (t)
The variation of electric current embodies the variation of electric field strength, this induced current is picked up and is handled, can be calculated
Electric field strength at detecting element position.
The numerical value that the calculating of power-frequency electric field strength belongs to electromagnetic field direct problem near route calculates and analysis, can find out it
Field domain midfield measure at any time, the rule of spatial distribution, to obtain at a distance from power supply.For horizontal overhead transmission line, produce
The source of raw alternating electromagnetic field is the electric current in route, belongs to power frequency sinusoidal excitation, at this time in linear medium, sinusoidal excitation and stable state item
Under part, the maxwell equation group of general type cannot can not be attributed to aobviously the multiple phasor representation form containing the time, i.e., any one electricity,
Magnetic field amount can use a multiple phasor representation, therefore the time-varying electric field in the case of Stable State of Sine is also referred to as time efficacy entropy,
Maxwell equation group can be write as phasor form under power frequency environment:
In formula, each field amount characterized in the form of phasor and the function that source amount is only space coordinate, modulus value be it is corresponding just
The virtual value of string amount.For example, actual time-varying electric field E (t) can be by electric field complex phase amountIt is indicated in time domain are as follows:
By solving this equation group, the approximate formula of the horizontal and vertical component of electric field strength near power circuit can be obtained:
In formula, y is the distance that power line projects to observation point over the ground, and I is the alternating current in power line, and h is power line
Average antenna height, z are observation point height,σ is the view of the earth in conductivity, μ0=4 π × 10-7H/m, ω are
Angular frequency, γ1For the earth propagation constant, u is characterized parameter, J0() is 0 rank Bessel function of the 1st class.
Therefore, the electric field strength at position of components can detecte by the induced current of conductor in detection power frequency electric field, closely
And measurement point is determined at a distance from electrical body, to come whether clear high-tension line charges, whether Work machine enters height
Field strength area, if close to the minimum safe distance of line facility, to alert whether people need to safely evacuate.
The feature and energized conductor that the magnetic field and electric field being distributed around according to transmission line of electricity have " near field region " are in electricity
Electrostatic equilibrium feature in, can obtain electric field strength at measuring device by induced current size of the metallic conductor in electromagnetic field
Size to obtain the distance between measuring device and alive circuit, and by the sending of acousto-optic warning module have it is electric, without telecommunications
Number state shows test point at a distance from route by display module.
This electroscope being distributed based on high-tension line and high-tension apparatus space electric field of the utility model, is not required to contact
Whether high-tension line and high-tension apparatus just can detect it and charge and the size of the electric field strength of present apparatus position, pass through electricity
The size of field comes whether clear high-tension line charges, whether Work machine enters high field area, if close to line facility
Minimum safe distance, to alert whether people need to safely evacuate.
Claims (6)
1. a kind of non-contact type high-voltage detecting device based on field strength distribution, it is characterised in that: it includes analyzing as central processing
And the single-chip microcontroller of control unit, further include the signal processing circuit being connect with the input side of single-chip microcontroller, Temperature and Humidity module, by
Key control and hardware reset, the acousto-optic warning module and display module being connect with the outlet side of single-chip microcontroller, signal processing circuit
Input side is connect with electric-field sensor,
Electric-field sensor, for reading the electric field signal near high-voltage line；
Signal processing circuit, the electric field signal of processing judgement input, sending have electricity, without electric two states signal；
Single-chip microcontroller will receive the signal that signal processing circuit is sent and identify that sending has electricity or without electric signal；
Acousto-optic warning module, sending has electricity or prompts without electricity voice and pass through signal lamp color not after receiving the signal of single-chip microcontroller
The different state with display route；
Display module, for showing test point at a distance from route；
Temperature and Humidity module corrects the analysis result of electric field strength for detecting the temperature and humidity at scene.
2. a kind of non-contact type high-voltage detecting device based on field strength distribution according to claim 1, it is characterised in that: described
It is in parallel on electric-field sensor that there are two varistors.
3. a kind of non-contact type high-voltage detecting device based on field strength distribution according to claim 2, it is characterised in that: two
Common mode inductance is connected between varistor.
4. a kind of non-contact type high-voltage detecting device based on field strength distribution according to claim 1, it is characterised in that: described
Signal processing circuit includes rectification amplifying circuit and Schmidt trigger, the high pressure that rectification amplifying circuit reads electric-field sensor
Electric field signal near line is sent into Schmidt trigger, and Schmidt trigger judges input signal, and sending has electricity, without electricity
Two states signal.
5. a kind of non-contact type high-voltage detecting device based on field strength distribution according to claim 4, it is characterised in that: described
Rectifying amplifying circuit includes voltage doubling rectifing circuit and differential amplifier circuit, and voltage doubling rectifing circuit is by multiple diodes and capacitance group
At reception electric-field sensor AC signal is simultaneously converted into direct current signal, is transmitted to differential amplifier circuit.
6. a kind of non-contact type high-voltage detecting device based on field strength distribution according to claim 1, it is characterised in that: described
Temperature and Humidity module includes temperature sensor and humidity sensor.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201821524971.6U CN208847788U (en) | 2018-09-18 | 2018-09-18 | A kind of non-contact type high-voltage detecting device based on field strength distribution |
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| CN201821524971.6U CN208847788U (en) | 2018-09-18 | 2018-09-18 | A kind of non-contact type high-voltage detecting device based on field strength distribution |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110632371A (en) * | 2019-09-30 | 2019-12-31 | 深圳供电局有限公司 | Charged non-contact detection device and method for object surface |
| CN110738820A (en) * | 2019-10-31 | 2020-01-31 | 国网河南省电力公司信息通信公司 | distribution operation field safety early warning circuit |
| CN110988503A (en) * | 2019-12-30 | 2020-04-10 | 南京弘毅电气自动化有限公司 | Distribution line power frequency electric field wireless measuring device and measurement correcting method |
| CN112435438A (en) * | 2020-11-14 | 2021-03-02 | 南京乔天自动化科技有限公司 | Wearable safety protection device |
| CN112684267A (en) * | 2020-12-02 | 2021-04-20 | 广东电网有限责任公司中山供电局 | Nearly electric alarm device |
| CN113238122A (en) * | 2021-07-01 | 2021-08-10 | 哈尔滨理工大学 | Fault detection device based on low-voltage cable electric field distribution |
-
2018
- 2018-09-18 CN CN201821524971.6U patent/CN208847788U/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110632371A (en) * | 2019-09-30 | 2019-12-31 | 深圳供电局有限公司 | Charged non-contact detection device and method for object surface |
| CN110632371B (en) * | 2019-09-30 | 2022-05-31 | 深圳供电局有限公司 | Charged non-contact detection device and method for object surface |
| CN110738820A (en) * | 2019-10-31 | 2020-01-31 | 国网河南省电力公司信息通信公司 | distribution operation field safety early warning circuit |
| CN110988503A (en) * | 2019-12-30 | 2020-04-10 | 南京弘毅电气自动化有限公司 | Distribution line power frequency electric field wireless measuring device and measurement correcting method |
| CN112435438A (en) * | 2020-11-14 | 2021-03-02 | 南京乔天自动化科技有限公司 | Wearable safety protection device |
| CN112684267A (en) * | 2020-12-02 | 2021-04-20 | 广东电网有限责任公司中山供电局 | Nearly electric alarm device |
| CN113238122A (en) * | 2021-07-01 | 2021-08-10 | 哈尔滨理工大学 | Fault detection device based on low-voltage cable electric field distribution |
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Granted publication date: 20190510 |