CN202748413U - Self-checking circuit of ground electric filed instrument - Google Patents
Self-checking circuit of ground electric filed instrument Download PDFInfo
- Publication number
- CN202748413U CN202748413U CN201220450086.4U CN201220450086U CN202748413U CN 202748413 U CN202748413 U CN 202748413U CN 201220450086 U CN201220450086 U CN 201220450086U CN 202748413 U CN202748413 U CN 202748413U
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- electric field
- field instrument
- self
- amplifier
- checking circuit
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Abstract
The utility model discloses a self-checking circuit of a ground electric field instrument, which comprises an electric field instrument controller, a D/A converter, an analog switch, an amplifier and a calibration electrode plate which are sequentially connected, wherein the electric field instrument controller controls the D/A converter to convert equipment self-checking parameter values into square wave standard voltage signals whose frequency is the same as that of an electric field instrument moving plate, and controls the analog switch to switch on or off; an output end of the analog switch is connected with an input end of the amplifier so as to connect the amplifier to amplify the voltage signals, and the amplified voltage signals are added on the calibration electrode plate so as to produce an electric field value; and the calibration electrode plate is arranged between an electric field instrument motor and a stator plate. The self-checking circuit disclosed by the utility model can monitor the precision of the electric field value measured by the electric field instrument, thereby ensuring the detection stability of the electric field instrument.
Description
Technical field
The utility model belongs to electronic applications, particularly a kind of self-checking circuit of ground electric field instrument.
Background technology
The surface air electric field instrument is a kind of equipment of measuring surface air electric field intensity by preposition sensor probe, for a long time the atmospheric electric field intensity of Near Ground is measured it be applied as us and study the whole process that lightning and thunderstorm occur favourable technological means is provided in the open air under the rugged environment.But now widely used mill formula electric field instrument do not have self-checking function, so that the stability of electric field instrument detection operations is difficult to guarantee.
The utility model content
The purpose of this utility model is to provide a kind of self-checking circuit of ground electric field instrument, and it can be monitored the electric field value precision that electric field instrument is measured, and guarantees that it surveys stability.
In order to reach above-mentioned purpose, solution of the present utility model is:
A kind of self-checking circuit of ground electric field instrument, comprise the electric field instrument controller, D/A converter, analog switch, amplifier and the demarcation battery lead plate that are linked in sequence, wherein, electric field instrument controller control D/A converter is converted to the frequency square wave standard voltage signal identical with the electric field instrument moving plate with the equipment self-inspection parameter value, the turning on and off of control simulation switch; The output terminal of described analog switch connects the input end of amplifier, connects amplifier the aforesaid voltage signal is amplified, and is added to and demarcates on the battery lead plate, produces electric field value; Described demarcation battery lead plate is located between electric field instrument motor and the stator.
Above-mentioned electric field instrument controller adopts C8051 F020 single-chip microcomputer.
Two 12 DAC that above-mentioned D/A converter adopts C8051 F020 single-chip microcomputer to carry.
Above-mentioned analog switch adopts ADG509.
Above-mentioned amplifier adopts the fundamental operation amplifier.
Above-mentioned demarcation battery lead plate adopts the sheet metal identical with the stator size.
After adopting such scheme, the utility model can preset the equipment self-inspection parameter value, electric field instrument controller control D/A converter carries out analog to digital conversion to it, produce the square wave standard voltage signal, then the control simulation switch connection is added in after amplifier amplifies voltage signal and demarcates on the battery lead plate, obtain one and be used for electric field value relatively, compare with the actual electric field value that records, judge the two error whether in accuracy rating, thereby realize self-checking function.This kind circuit structure can be so that the ground electric field instrument has self-checking function, and project organization is simple, and cost is low, can be used for the self check of electric field instrument detection accuracy.
Description of drawings
Fig. 1 is structured flowchart of the present utility model;
Fig. 2 is a kind of enforcement structural drawing of the present utility model.
Embodiment
Below with reference to accompanying drawing, the technical solution of the utility model is elaborated.
As shown in Figure 1, the utility model provides a kind of self-checking circuit of ground electric field instrument, comprises electric field instrument controller, D/A converter, analog switch, amplifier and demarcation battery lead plate, and the below introduces respectively.
Store the equipment self-inspection parameter value that the user sets in the electric field instrument controller, and control D/A converter and carry out digital-to-analog conversion, described electric field instrument controller can adopt C8051 F020 single-chip microcomputer.
D/A converter is used for the self check parameter value that the electric field instrument controller transmits is converted to the self check control signal of analog quantity, and this self check control signal is the square wave standard voltage signal, but the turning on and off of control simulation switch; Described D/A converter can adopt aforementioned C8051 F020 single-chip microcomputer self with two 12 DAC.
Turning on and off of analog switch determines beginning and the end of self check work, and described analog switch can adopt ADG509, and its output terminal connects the input end of amplifier.
Amplifier is used for aforementioned square wave standard voltage signal is amplified, and the voltage signal after will amplifying is added on the demarcation battery lead plate; Described amplifier can adopt the fundamental operation amplifier.
Demarcate battery lead plate and be located between electric field instrument motor and the stator, for generation of an electric field value, this electric field value and the actual electric field value that records of electric field instrument are compared, detect the two error whether in accuracy rating, thus the realization self-checking function.Described demarcation battery lead plate can adopt the sheet metal identical with the stator size.
During the utility model work, at set intervals, the electric field instrument controller produces the self check control signal according to the self check parameter value control D/A converter that the user sets, and this self check control signal is the square wave standard voltage signal, and the control simulation switch connection begins self check work; The aforesaid voltage signal is demarcated on the battery lead plate through being added to behind the amplifier magnify 20, produce an electric field value by demarcating battery lead plate, this electric field value and the actual electric field value that records of electric field instrument are compared, detect both errors whether in accuracy rating, realize self-checking function.The utility model can be so that the ground electric field instrument has self-checking function, and project organization is simple, and cost is low, can be used for the self check of electric field instrument detection accuracy.
As shown in Figure 2, the utility model in the specific implementation, the electric field instrument controller adopts the C8051F020 single-chip microcomputer, wherein stores the digital quantity equipment self-inspection parameter value that the user sets, and automatically exports at set intervals this parameter value and produces the self check control signal to D/A converter; D/A converter be C8051F020 single-chip microcomputer self with two 12 DAC, the equipment self-inspection parameter value is converted to analog quantity by digital quantity, for generation of the self check control signal, the aanalogvoltage after the conversion is 0～2.5V square-wave signal, and its frequency is identical with the frequency that the electric field instrument moving plate produces; D/A converter output control simulation switch ADG509 connects beginning self check work; Amplifier adopts the fundamental operation amplifier to self check parameter simulation magnitude of voltage magnify 20, i.e. 0～50V; Voltage after the amplification is that demarcation signal is added in the electric field instrument on the demarcation battery lead plate between the stator and motor, the electric field value of demarcating the battery lead plate generation is E=V/d, V is for demarcating the pressure reduction of pole plate and signal stator, d is two distances between the pole piece, its scope is 0～50kV/m, this electric field value and electric field instrument actual measurement electric field value is compared, detect both errors whether in accuracy rating, realize self-checking function.
Specific embodiment described in the utility model is preferred embodiment of the present utility model only, is not to limit practical range of the present utility model.Be that all equivalences of doing according to the content of the utility model claim change and modification, all should be as technology category of the present utility model.
Claims (6)
1. the self-checking circuit of a ground electric field instrument, it is characterized in that: comprise the electric field instrument controller, D/A converter, analog switch, amplifier and the demarcation battery lead plate that are linked in sequence, wherein, electric field instrument controller control D/A converter is converted to the frequency square wave standard voltage signal identical with the electric field instrument moving plate with the equipment self-inspection parameter value, the turning on and off of control simulation switch; The output terminal of described analog switch connects the input end of amplifier, connects amplifier the aforesaid voltage signal is amplified, and is added to and demarcates on the battery lead plate, produces electric field value; Described demarcation battery lead plate is located between electric field instrument motor and the stator.
2. the self-checking circuit of a kind of ground electric field instrument as claimed in claim 1 is characterized in that: described electric field instrument controller employing C8051 F020 single-chip microcomputer.
3. the self-checking circuit of a kind of ground electric field instrument as claimed in claim 2 is characterized in that: two 12 DAC that described D/A converter adopts C8051 F020 single-chip microcomputer to carry.
4. the self-checking circuit of a kind of ground electric field instrument as claimed in claim 1 is characterized in that: described analog switch employing ADG509.
5. the self-checking circuit of a kind of ground electric field instrument as claimed in claim 1 is characterized in that: described amplifier employing fundamental operation amplifier.
6. the self-checking circuit of a kind of ground electric field instrument as claimed in claim 1 is characterized in that: the described demarcation battery lead plate employing sheet metal identical with the stator size.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201220450086.4U CN202748413U (en) | 2012-09-06 | 2012-09-06 | Self-checking circuit of ground electric filed instrument |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201220450086.4U CN202748413U (en) | 2012-09-06 | 2012-09-06 | Self-checking circuit of ground electric filed instrument |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202748413U true CN202748413U (en) | 2013-02-20 |
Family
ID=47707787
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201220450086.4U Expired - Lifetime CN202748413U (en) | 2012-09-06 | 2012-09-06 | Self-checking circuit of ground electric filed instrument |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202748413U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112285443A (en) * | 2020-12-31 | 2021-01-29 | 中国电力科学研究院有限公司 | Electric field measuring equipment provided with self-calibration device and self-calibration method |
-
2012
- 2012-09-06 CN CN201220450086.4U patent/CN202748413U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112285443A (en) * | 2020-12-31 | 2021-01-29 | 中国电力科学研究院有限公司 | Electric field measuring equipment provided with self-calibration device and self-calibration method |
| CN112285443B (en) * | 2020-12-31 | 2021-04-13 | 中国电力科学研究院有限公司 | Electric field measuring equipment provided with self-calibration device and self-calibration method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130220 |
|
| CX01 | Expiry of patent term |