CN204613314U - A kind of gas electrostatic density measuring instrument - Google Patents
A kind of gas electrostatic density measuring instrument Download PDFInfo
- Publication number
- CN204613314U CN204613314U CN201520324575.9U CN201520324575U CN204613314U CN 204613314 U CN204613314 U CN 204613314U CN 201520324575 U CN201520324575 U CN 201520324575U CN 204613314 U CN204613314 U CN 204613314U
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- measuring instrument
- gas
- density measuring
- inner core
- gas electrostatic
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Abstract
The utility model discloses a kind of gas electrostatic density measuring instrument, this gas electrostatic density measuring instrument comprises electric charge induction sensor, capacitance-type vibration sensor, Signal-regulated kinase and control module, main measuring principle is the electric potential difference produced at electric charge induction sensor inside and outside wall by electric charge in measurement gas, calculates the electric density of charged gas.Can measure thunder cloud gas electric density by this gas electrostatic density measuring instrument, the design of bicylindrical barrel structure can effectively avoid extraneous gas on the impact of measuring, and circuit is simple, and good stability, measuring accuracy is high, has a good application prospect, and is worthy to be popularized.
Description
Technical field
The utility model belongs to space charge distribution measurement techniques field, is specifically related to a kind of gas electrostatic density measuring instrument, and this surveying instrument is the instrument that one is applicable to the measurement to electric density in gas (as cumulonimbus, thunder cloud).
Background technology
Under given conditions, some gases can bring certain electrostatic, as thunder cloud etc.Owing to there is electric potential difference with ground in thunder cloud, electric discharge can form thunder and lightning earthward, thunder and lightning can smash buildings, damage equipment, also forest fire can be caused, threaten the life security of people, therefore people have carried out large quantity research to thunder and lightning, comprise the measurement, early warning etc. of the Crack cause of thunder and lightning, thunder and lightning.In air, the detection of electric charge, electric field is that thunder and lightning occurs, the exploration, research, early warning etc. of the physical process of development provide essential tool, especially in thunder cloud the detection of CHARGE DISTRIBUTION be thunder cloud internal charge structure, in the air of the inner and periphery of thunder cloud the analysis of Electric Field Distribution and lightning discharge characteristic and research provide important evidence, but existing static measuring instruments, atmospheric electric field surveying instrument etc., all can only measure qualitatively the existence of electric charge, cannot measure by accurate quantitative analysis.
Chinese patent publication No. is the instruments and methods that patent discloses the measurement of a kind of space charge density of CN103091567A, adopt single cylindrical structure, effectively cannot avoid the electric field overlaying influence that the electric body of cylinder tyre brings, and circuit is complicated, antijamming capability is weak, therefore, need further to study.
Utility model content
In order to solve the deficiencies in the prior art, the utility model provides a kind of gas electrostatic density measuring instrument, thunder cloud gas electric density can be measured by this gas electrostatic density measuring instrument, the design of bicylindrical barrel structure can effectively avoid extraneous gas on the impact of measuring, circuit is simple, good stability, measuring accuracy is high.
For solving the problem, the utility model specifically by the following technical solutions:
A kind of gas electrostatic density measuring instrument, it is characterized in that, comprise the electric charge induction sensor connected successively, capacitance-type vibration sensor, Signal-regulated kinase and control module, described electric charge induction sensor comprises metal inner core and coaxial with metal inner core, the metal outer cylinder outside metal inner core is set in by insulating support, described metal outer cylinder and metal inner core are equipped with insulation course, in electric charge induction sensor, outer metal cylinder is all coated with the insullac that one deck principal ingredient is poly-amino formicester, thus formation insulation course, fill full insulating material between the barrel of described metal outer cylinder and metal inner core to seal, the described inwall of metal inner core is connected with the earth polar of capacitance-type vibration sensor, the outer wall of described metal outer cylinder is connected with the probe of capacitance-type vibration sensor, one end of described metal inner core is provided with fan.
Aforesaid a kind of gas electrostatic density measuring instrument, it is characterized in that, described Signal-regulated kinase and control module are packaged in shielding case.
Aforesaid a kind of gas electrostatic density measuring instrument, it is characterized in that, described Signal-regulated kinase comprises pre-amplification circuit and phase-sensitive detection circuit, and the input end of described pre-amplification circuit is connected with the output terminal of capacitance-type vibration sensor.The signal of capacitance-type vibration sensor collection reaches the requirement of follow-up microprocessor after pre-amplification circuit amplifies.
Aforesaid a kind of gas electrostatic density measuring instrument, it is characterized in that, described control module comprises microprocessor, power supply and LCD display.
Aforesaid a kind of gas electrostatic density measuring instrument, it is characterized in that, described microprocessor is STM32f101 microprocessor.
Aforesaid a kind of gas electrostatic density measuring instrument, is characterized in that, also comprise the data transmission circuit with upper machine communication, described data transmission circuit is connected with microprocessor.By wireless transmission method as GPRS by data upload to host computer, facilitate follow-up data storing and analysis.
The measuring method of this gas electrostatic density measuring instrument, comprises the following steps:
Step (1), opens fan, and fan rotates with certain speed and sucked in electric charge induction sensor by charged gas, causes the potential change of the inside and outside wall of electric charge induction sensor;
Step (2), the capacitance-type vibration sensor be connected with electric charge induction sensor measures the electric potential difference of electric charge induction sensor, exports faint Signal transmissions to the pre-amplification circuit in Signal-regulated kinase; By the operational amplification circuit of high input impedance, loss of signal is minimum.
Step (3), signal after amplification leads up to zero-crossing comparator becomes the synchronizing signal that square wave becomes the phase-sensitive detection circuit in Signal-regulated kinase, another road signal transfers in STM32f101 microprocessor by the phase-sensitive detection circuit in Signal-regulated kinase, convert simulating signal to digital signal through the A/D conversion of 12, go out the computing formula of electric density according to the relation derivation of Gauss theorem, electromotive force and electric field:
Wherein ρ is the electric density of gas, ε
0represent the dielectric constant of gas, V represents the electric potential difference of the inside and outside wall of electric charge induction sensor, and a is the radius of electric charge induction sensor inwall, and b is the radius of electric charge induction sensor outer wall;
Step (4), the result after microprocessor processes is shown by LCD display.
The beneficial effects of the utility model:
1. the utility model gas electrostatic density measuring instrument adopts the model that two coaxial metal cylinders with insulation course form, can the gas that cannot directly measure be fixed in metallic cylinder, derive the relation between electric density and electromotive force by physics principle, thus determining charge density is converted into the measurement of the electromotive force that electric charge produces.
2. phase-sensitive detection circuit adopts synchronizing signal, can distinguish the polarity of electric charge easily, facilitate follow-up analytical work in detection process.
3. the utility model gas electrostatic density measuring instrument circuit design is simple, and cost is low.The signal that capacitance-type vibration sensor gathers, by pre-amplification circuit and phase-sensitive detection circuit input microprocessor, utilizes the A/D translation function of STM32 microprocessor itself that simulating signal is converted into digital signal, enormously simplify circuit and reduce cost.
4. the utility model gas electrostatic density measuring instrument antijamming capability is strong, and precision is high.The metallic cylinder model of insulation effectively can reduce charged particles in ambient gas and produce the mutual overlaying influence of electric field, and circuit is all packaged in shielding case, effectively can reduce the impact of varying environment on this device, improves measuring accuracy.
Accompanying drawing explanation
Fig. 1 is the structured flowchart of gas electrostatic density measuring instrument of the present utility model.
Fig. 2 is metering circuit schematic diagram.
Reference numeral implication is as follows:
1: metal inner core; 2: metal outer cylinder; 3: insulating material; 4: fan.
Embodiment
Below in conjunction with accompanying drawing, the utility model is described in further detail.
As Fig. 1, shown in Fig. 2, a kind of gas electrostatic density measuring instrument, comprise the electric charge induction sensor connected successively, capacitance-type vibration sensor, Signal-regulated kinase and control module, described electric charge induction sensor comprises metal inner core 1 and coaxial with metal inner core 1, the metal outer cylinder 2 outside metal inner core 1 is set in by insulating support, described metal outer cylinder 2 and metal inner core 1 are equipped with insulation course, fill full insulating material 3 between described metal outer cylinder 2 and the barrel of metal inner core 1 to seal, the described inwall of metal inner core 1 is connected with the earth polar of capacitance-type vibration sensor, the described outer wall of metal outer cylinder 2 is connected with the probe of capacitance-type vibration sensor, one end of described metal inner core 1 is provided with fan 4.
Further, described Signal-regulated kinase and control module are packaged in shielding case.Described Signal-regulated kinase comprises pre-amplification circuit and phase-sensitive detection circuit, and the input end of described pre-amplification circuit is connected with the output terminal of capacitance-type vibration sensor.The signal of capacitance-type vibration sensor collection reaches the requirement of follow-up microprocessor after pre-amplification circuit amplifies.Described control module comprises microprocessor, power supply and LCD display, and preferred described microprocessor is STM32f101 microprocessor.
Further, also comprise the data transmission circuit with upper machine communication, described data transmission circuit is connected with microprocessor.By wireless transmission method as GPRS by data upload to host computer, facilitate follow-up data storing and analysis.
The measuring method of this gas electrostatic density measuring instrument, comprises the following steps:
Step (1), opens fan, and fan rotates with certain speed and sucked in electric charge induction sensor by charged gas, causes the potential change of the inside and outside wall of electric charge induction sensor;
Step (2), the capacitance-type vibration sensor be connected with electric charge induction sensor measures the electric potential difference of electric charge induction sensor, exports faint Signal transmissions to the pre-amplification circuit in Signal-regulated kinase; By the operational amplification circuit of high input impedance, loss of signal is minimum.
Step (3), signal after amplification leads up to zero-crossing comparator becomes the synchronizing signal that square wave becomes the phase-sensitive detection circuit in Signal-regulated kinase, another road signal transfers in STM32f101 microprocessor by the phase-sensitive detection circuit in Signal-regulated kinase, convert simulating signal to digital signal through the A/D conversion of 12, go out the computing formula of electric density according to the relation derivation of Gauss theorem, electromotive force and electric field:
Wherein ρ is the electric density of gas, ε
0represent the dielectric constant of gas, V represents the electric potential difference of the inside and outside wall of electric charge induction sensor, and a is the radius of electric charge induction sensor inwall, that is the radius of metal inner core, and b is the radius of electric charge induction sensor outer wall, that is the radius of metal outer cylinder;
Step (4), the result after microprocessor processes is shown by LCD display.
The utility model in order to solve the problem of gas electrostatic density measure, provide a kind of can the surveying instrument of effective measurement gas electrostatic density.This instrument can by measuring the electrostatic potential that gas produces, and gone out the electrostatic density of gas by physics formulae discovery, circuit is simple, and good stability, measuring accuracy is high, is worthy to be popularized.
More than show and describe ultimate principle of the present utility model, principal character and advantage.The technician of the industry should understand; the utility model is not restricted to the described embodiments; what describe in above-described embodiment and instructions just illustrates principle of the present utility model; under the prerequisite not departing from the utility model spirit and scope; the utility model also has various changes and modifications, and these changes and improvements all fall within the scope of claimed the utility model.The claimed scope of the utility model is defined by appending claims and equivalent thereof.
Claims (7)
1. a gas electrostatic density measuring instrument, it is characterized in that, comprise the electric charge induction sensor connected successively, capacitance-type vibration sensor, Signal-regulated kinase and control module, described electric charge induction sensor comprises metal inner core and coaxial with metal inner core, the metal outer cylinder outside metal inner core is set in by insulating support, described metal outer cylinder and metal inner core are equipped with insulation course, fill full insulating material between the barrel of described metal outer cylinder and metal inner core to seal, the described inwall of metal inner core is connected with the earth polar of capacitance-type vibration sensor, the outer wall of described metal outer cylinder is connected with the probe of capacitance-type vibration sensor, one end of described metal inner core is provided with fan.
2. a kind of gas electrostatic density measuring instrument according to claim 1, it is characterized in that, described Signal-regulated kinase and control module are packaged in shielding case.
3. a kind of gas electrostatic density measuring instrument according to claim 2, it is characterized in that, described Signal-regulated kinase comprises pre-amplification circuit and phase-sensitive detection circuit, and the input end of described pre-amplification circuit is connected with the output terminal of capacitance-type vibration sensor.
4. a kind of gas electrostatic density measuring instrument according to claim 2, it is characterized in that, described control module comprises microprocessor, power supply and LCD display.
5. a kind of gas electrostatic density measuring instrument according to claim 4, it is characterized in that, described microprocessor is STM32f101 microprocessor.
6. a kind of gas electrostatic density measuring instrument according to claim 1, is characterized in that, also comprise the data transmission circuit with upper machine communication, described data transmission circuit is connected with microprocessor.
7. a kind of gas electrostatic density measuring instrument according to claim 1, is characterized in that, described insulating material is dry air or cotton, silicon rubber.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520324575.9U CN204613314U (en) | 2015-05-19 | 2015-05-19 | A kind of gas electrostatic density measuring instrument |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520324575.9U CN204613314U (en) | 2015-05-19 | 2015-05-19 | A kind of gas electrostatic density measuring instrument |
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| Publication Number | Publication Date |
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| CN204613314U true CN204613314U (en) | 2015-09-02 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520324575.9U Expired - Fee Related CN204613314U (en) | 2015-05-19 | 2015-05-19 | A kind of gas electrostatic density measuring instrument |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104820140A (en) * | 2015-05-19 | 2015-08-05 | 南京信息工程大学 | Gas electrostatic density measuring instrument and method |
| CN110389261A (en) * | 2018-04-19 | 2019-10-29 | 中国石油化工股份有限公司 | For monitoring the device of liquid line electrostatic charge density |
-
2015
- 2015-05-19 CN CN201520324575.9U patent/CN204613314U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104820140A (en) * | 2015-05-19 | 2015-08-05 | 南京信息工程大学 | Gas electrostatic density measuring instrument and method |
| CN110389261A (en) * | 2018-04-19 | 2019-10-29 | 中国石油化工股份有限公司 | For monitoring the device of liquid line electrostatic charge density |
| CN110389261B (en) * | 2018-04-19 | 2021-09-10 | 中国石油化工股份有限公司 | Device for monitoring electrostatic charge density of liquid pipeline |
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Legal Events
| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150902 Termination date: 20170519 |
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| CF01 | Termination of patent right due to non-payment of annual fee |