CN104569762A - Intelligent gas discharge tube DC breakdown voltage measuring device - Google Patents
Intelligent gas discharge tube DC breakdown voltage measuring device Download PDFInfo
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- CN104569762A CN104569762A CN201510002641.5A CN201510002641A CN104569762A CN 104569762 A CN104569762 A CN 104569762A CN 201510002641 A CN201510002641 A CN 201510002641A CN 104569762 A CN104569762 A CN 104569762A
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- discharge tube
- gas discharge
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- breakdown voltage
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Abstract
The invention discloses an intelligent gas discharge tube DC breakdown voltage measuring device. The device comprises a microcontroller, a volt-ampere acquisition unit, a high-voltage power supply unit, a measurement selection unit and a measurement interface, wherein the volt-ampere acquisition unit is connected with the microcontroller, the high-voltage power supply unit is connected with the volt-ampere acquisition unit through the measurement selection unit, the measurement interface is connected with the measurement selection unit, the high-voltage power supply unit is used for providing measurement voltages for a gas discharge tube, the measurement selection unit is used for selecting from different measurement voltages, the measurement interface is used for being connected with the gas discharge tube, and the volt-ampere acquisition unit is used for acquiring the current value and voltage value of the gas discharge tube. According to the device, automatic measurement and high-speed signal processing are achieved through a DSP controller, strong processing function and rich peripheral resources are obtained, a power management clock is low in power consumption, operation is convenient, and safety and energy saving are realized.
Description
Technical field
The present invention relates to a kind of intelligent gas discharge tube DC breakdown voltage measuring apparatus, belong to thunder and lightning science and technology field.
Background technology
Lightning Electromagnetic Pulse or line switching spark often occur in a kind of abnormal occurrence in communication line, operation circuit and power supply grid line.Due to the development of information highway, computer networking and CATV (cable television) etc. universal, to the lightning protection of transmission line and the requirement of overvoltage protection more and more higher.
Gas-discharge tube is metal and ceramic hermetic seal device, and shell is Al2O3 pottery, and electrode is made up of Fe-Ni alloy/C material, and electrode surface scribbles the negative electrode powder as emissive material, is filled with inert gas in pipe.Generally have diode, triode two kinds of discharge tubes, gas-discharge tube is the ionic device utilizing gas discharge theory.When being added in the voltage on pipe and meeting or exceeding its voltage breakdown, pipe conducting becomes low impedance state from high impedance status, thus makes surge current release greatly, and protection instrument and equipment and staff are from overvoltage impact.If impressed voltage cuts off, then pipe recovers high impedance status, does not affect the normal work of instrument and equipment.Therefore, can overvoltage surge always during gas-discharge tube, meet equipment, the lightning protection of circuit and the requirement of overvoltage protection, ensure the effective device of one that circuit normally runs.DC breakdown voltage is the important parameter weighing gas-discharge tube performance.Ensure that gas-discharge tube can be in the duty of normal table in the line for a long time, extremely important to the measurement of the DC breakdown magnitude of voltage of gas-discharge tube.
At present, existingly mainly contain following two about gas-discharge tube voltage breakdown measurement mechanism: first Chinese invention application " gas-discharge tube DC breakdown voltage measuring apparatus and method ", its application number is 201010199158.8, by micro-current differential sensor judge rapidly and accurately gas-discharge tube under the DC voltage condition applying regulation climbing speed state of insulation to micro-electric current switching signal of conducting state; It two is Chinese utility model application " a kind of gas-discharge tube DC breakdown voltage measuring apparatus ", its application number is 201320012158.1, utilize the DC voltage that climbing speed is 100V/s and 1000V/s, measure discharge tube transfers low impedance state to DC breakdown voltage from high impedance status.But the former mainly summarizes the design of gas-discharge tube device and method in form of a block diagram, does not relate to physical circuit, need consultant to have higher control circui basis, be unfavorable for the popularization of technology; The external units such as discharge tube spark-over measurement mechanism and microcontroller combine by the latter's shortage, and intelligent automation is not enough.
Summary of the invention
Technical matters to be solved by this invention is: provide a kind of intelligent gas discharge tube DC breakdown voltage measuring apparatus, realize the automatic measurement to gas-discharge tube DC breakdown voltage, and store measurement data, show and process.
The present invention is for solving the problems of the technologies described above by the following technical solutions:
A kind of intelligent gas discharge tube DC breakdown voltage measuring apparatus, comprise microcontroller, volt-ampere collecting unit, high voltage source unit, measurement selection unit and measurement interface, described volt-ampere collecting unit is connected with described microcontroller, described high voltage source unit is connected with volt-ampere collecting unit through measuring selection unit, and described measurement interface is connected with described measurement selection unit; Described high voltage source unit is used for providing measuring voltage to described gas-discharge tube, described measurement selection unit is for selecting different measuring voltages, described measurement interface is for connecting gas-discharge tube, and described volt-ampere collecting unit is for gathering current value and the magnitude of voltage of gas-discharge tube.
Further, described intelligent gas discharge tube DC breakdown voltage measuring apparatus also comprises display unit, and described display unit is connected with described microcontroller.
Further, described intelligent gas discharge tube DC breakdown voltage measuring apparatus also comprises storage unit, and described storage unit is connected with described microcontroller.
Further, described intelligent gas discharge tube DC breakdown voltage measuring apparatus also comprises PC, and described PC is connected with described microcontroller.
Preferably, described high voltage source unit comprises the sine-wave generator, voltage-controlled amplifier, power amplifier, step-up transformer and the current rectifying and wave filtering circuit that connect successively, also comprises the 100V/s control circuit, the 1000V/s control circuit that are connected with described voltage-controlled amplifier respectively.
Preferably, described microcontroller is TMS320LF240x series DSP controller.
The present invention adopts above technical scheme compared with prior art, has following technique effect:
1, intelligent gas discharge tube DC breakdown voltage measuring apparatus of the present invention, the DC pulse utilizing photoelectric coupling principle extraction gas-discharge tube to puncture instantaneous generation is become the criterion of low impedance state from high impedance status as discharge tube, there is the measurement response time fast, the features such as measurement range is wide, and measuring error is little.
2, intelligent gas discharge tube DC breakdown voltage measuring apparatus of the present invention, utilize dsp controller to realize automatically measuring, igh-speed wire-rod production line, has powerful processing capacity and abundant peripheral hardware resource, clock low power consumption during power management, easy to operate, energy-saving safe.
3, intelligent gas discharge tube DC breakdown voltage measuring apparatus of the present invention, the control circuit utilizing voltage-controlled amplifier to realize 100V/s and 1000V/s controls, and output voltage precision is high, linearly better.
4, intelligent gas discharge tube DC breakdown voltage measuring apparatus of the present invention, during DC breakdown voltage measurement to the gas-discharge tube of 50V ~ 5000V, the response time is about 3 μ s.
Accompanying drawing explanation
Fig. 1 is the structural representation of intelligent gas discharge tube DC breakdown voltage measuring apparatus of the present invention.
Fig. 2 is the structural representation of high voltage source unit of the present invention.
Fig. 3 is the circuit theory diagrams of sine-wave generator of the present invention and voltage-controlled amplifier.
Fig. 4 is the circuit theory diagrams of power amplifier of the present invention, step-up transformer and current rectifying and wave filtering circuit.
Fig. 5 is the circuit diagram of volt-ampere collecting unit of the present invention.
Embodiment
Be described below in detail embodiments of the present invention, the example of described embodiment is shown in the drawings, and wherein same or similar label represents same or similar element or has element that is identical or similar functions from start to finish.Being exemplary below by the embodiment be described with reference to the drawings, only for explaining the present invention, and can not limitation of the present invention being interpreted as.
As shown in Figure 1, for intelligent gas discharge tube DC breakdown voltage measuring apparatus of the present invention, comprise microcontroller, volt-ampere collecting unit, high voltage source unit, measurement selection unit, measurement interface, display unit, storage unit and PC, microcontroller implementation is to high voltage source unit, the control of measuring selection unit, display unit, storage unit and PC, read the data value that volt-ampere collecting unit records simultaneously, and these data are stored in storage unit, then data importing PC is carried out secondary treating; Volt-ampere collecting unit mainly realizes measuring ability, and by electromagnetic induction principle, the current value after powering up tested gas-discharge tube and magnitude of voltage gather respectively in the form of a voltage, transfers in microcontroller by the data after conversion; High voltage source unit mainly provides the optional bimodulus measuring voltage of 100V/s and 1000V/s; The channel selecting instruction that measurement selection unit mainly sends microcontroller is decoded and realizes the switching of Measurement channel; Measurement interface mainly reliably connects the metal pole of gas-discharge tube or gas-discharge tube, and carries out safeguard protection with plastic-steel cloche.
As shown in Figure 2, be the structural representation of high voltage source unit of the present invention, form primarily of sine-wave generator, voltage-controlled amplifier, power amplifier, step-up transformer, current rectifying and wave filtering circuit and 100V/s, 1000V/s control circuit.Its course of work is that the sine wave of sine-wave generator generation 1kHz amplifies through voltage-controlled amplifier, the gain of voltage-controlled amplifier is controlled by 100V/s, 1000V/s control circuit, 20dB scope, after power amplifier amplifies, step-up transformer is as the load of power amplifier, first turn ratio is 1:500, and ceiling voltage exports and is 10kV, exports the DC voltage for 100V/s, 1000V/s through current rectifying and wave filtering circuit.
As shown in Figure 3, be the circuit theory diagrams of sine-wave generator of the present invention and voltage-controlled amplifier, the simple electric bridge oscillatory circuit that sine-wave generator (a) is high-voltage power supply work, its oscillation frequency is 110Hz, runs amplifier and adopts OP27.In voltage-controlled amplifier and control circuit (b), electric capacity C and resistance R main composition control circuit, in fact RC charging circuit loop, control RC time constant can change the frequency of output voltage, and voltage-controlled amplifier is made up of field effect transistor and operational amplifier LM358, and D is equivalent to electronic potentiometer, change the size of grid voltage, the resistance of drain electrode and source electrode is changed, thus changes the size of output voltage, the relative gain changing whole circuit.
As shown in Figure 4, for the circuit theory diagrams of power amplifier of the present invention, step-up transformer and current rectifying and wave filtering circuit, in power amplifier and step-up transformer (c), power device Q1 and Q2 grid power input are sine wave signal, these two field effect transistor alternate conduction of Q1 and Q2, by the secondary output high pressure of step-up transformer T1 and T2 at stepup transformer.Current rectifying and wave filtering circuit (d) is primarily of D1 ~ D4 rectification silicon, and electric current is 1A, and voltage is 10kV, and the high-voltage capacitance composition of 10kV/10 μ F.
As shown in Figure 5, be the circuit diagram of volt-ampere collecting unit of the present invention, volt-ampere collecting unit is formed primarily of sample resistance, TVS pipe, operational amplifier, optocoupler device, and the control signal that this circuit exports controls voltage-controlled amplifier and stops exporting.This circuit working process is as follows: current-limiting resistance is R1, sample resistance is R2, after gas-discharge tube punctures, voltage on sample resistance R2 drives transistor base through voltage follower, then photoelectric coupled device is driven, photoelectric coupled device is luminous, and exports the control signal of gas-discharge tube conducting, and microcontroller starts to gather voltage breakdown.In addition, the data of microcontroller can also be uploaded to PC, carry out secondary treating analysis by PC to data, as curve plotting, calculation expectation variance etc.
Above embodiment is only and technological thought of the present invention is described, can not limit protection scope of the present invention with this, and every technological thought proposed according to the present invention, any change that technical scheme basis is done, all falls within scope.
Claims (6)
1. an intelligent gas discharge tube DC breakdown voltage measuring apparatus, it is characterized in that: comprise microcontroller, volt-ampere collecting unit, high voltage source unit, measurement selection unit and measurement interface, described volt-ampere collecting unit is connected with described microcontroller, described high voltage source unit is connected with volt-ampere collecting unit through measuring selection unit, and described measurement interface is connected with described measurement selection unit; Described high voltage source unit is used for providing measuring voltage to described gas-discharge tube, described measurement selection unit is for selecting different measuring voltages, described measurement interface is for connecting gas-discharge tube, and described volt-ampere collecting unit is for gathering current value and the magnitude of voltage of gas-discharge tube.
2. intelligent gas discharge tube DC breakdown voltage measuring apparatus as claimed in claim 1, is characterized in that: described intelligent gas discharge tube DC breakdown voltage measuring apparatus also comprises display unit, and described display unit is connected with described microcontroller.
3. intelligent gas discharge tube DC breakdown voltage measuring apparatus as claimed in claim 1, is characterized in that: described intelligent gas discharge tube DC breakdown voltage measuring apparatus also comprises storage unit, and described storage unit is connected with described microcontroller.
4. intelligent gas discharge tube DC breakdown voltage measuring apparatus as claimed in claim 1, is characterized in that: described intelligent gas discharge tube DC breakdown voltage measuring apparatus also comprises PC, and described PC is connected with described microcontroller.
5. intelligent gas discharge tube DC breakdown voltage measuring apparatus as claimed in claim 1, it is characterized in that: described high voltage source unit comprises the sine-wave generator, voltage-controlled amplifier, power amplifier, step-up transformer and the current rectifying and wave filtering circuit that connect successively, also comprise the 100V/s control circuit, the 1000V/s control circuit that are connected with described voltage-controlled amplifier respectively.
6. intelligent gas discharge tube DC breakdown voltage measuring apparatus as claimed in claim 1, is characterized in that: described microcontroller is TMS320LF240x series DSP controller.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510002641.5A CN104569762A (en) | 2015-01-05 | 2015-01-05 | Intelligent gas discharge tube DC breakdown voltage measuring device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510002641.5A CN104569762A (en) | 2015-01-05 | 2015-01-05 | Intelligent gas discharge tube DC breakdown voltage measuring device |
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| CN104569762A true CN104569762A (en) | 2015-04-29 |
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| CN201510002641.5A Pending CN104569762A (en) | 2015-01-05 | 2015-01-05 | Intelligent gas discharge tube DC breakdown voltage measuring device |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105004978A (en) * | 2015-08-10 | 2015-10-28 | 南京信息工程大学 | Multi-channel testing apparatus for direct-current breakdown voltage of switching type surge protection device |
| CN105137314A (en) * | 2015-08-29 | 2015-12-09 | 东莞市金华电子有限公司 | Gas discharge tube testing method and system employing mode of CPU numerical control |
| CN109901039A (en) * | 2019-03-29 | 2019-06-18 | 国网上海市电力公司 | A kind of converter valve thyristor presses component test set and method |
-
2015
- 2015-01-05 CN CN201510002641.5A patent/CN104569762A/en active Pending
Non-Patent Citations (2)
| Title |
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| 周方亮: "气体放电管浪涌防护电路自动测试系统研制", 《铁路通信信号工程技术》 * |
| 黎步银等: "气体放电管直流击穿电压自动测试系统的研制", 《计量学报》 * |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105004978A (en) * | 2015-08-10 | 2015-10-28 | 南京信息工程大学 | Multi-channel testing apparatus for direct-current breakdown voltage of switching type surge protection device |
| CN105004978B (en) * | 2015-08-10 | 2017-09-26 | 南京信息工程大学 | Multi-channel switch type surge protector dc breakdown voltage test device |
| CN105137314A (en) * | 2015-08-29 | 2015-12-09 | 东莞市金华电子有限公司 | Gas discharge tube testing method and system employing mode of CPU numerical control |
| CN109901039A (en) * | 2019-03-29 | 2019-06-18 | 国网上海市电力公司 | A kind of converter valve thyristor presses component test set and method |
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Application publication date: 20150429 |