CN2123774U - Fast static-electricity voltage testing probe - Google Patents

Fast static-electricity voltage testing probe Download PDF

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Publication number
CN2123774U
CN2123774U CN 92224700 CN92224700U CN2123774U CN 2123774 U CN2123774 U CN 2123774U CN 92224700 CN92224700 CN 92224700 CN 92224700 U CN92224700 U CN 92224700U CN 2123774 U CN2123774 U CN 2123774U
Authority
CN
China
Prior art keywords
crystal
static
light
voltage testing
fast
Prior art date
Application number
CN 92224700
Other languages
Chinese (zh)
Inventor
孙冰
王荣毅
Original Assignee
大连理工大学
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 大连理工大学 filed Critical 大连理工大学
Priority to CN 92224700 priority Critical patent/CN2123774U/en
Publication of CN2123774U publication Critical patent/CN2123774U/en

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Abstract

The utility model relates to a fast static-electricity voltage testing probe which belongs to the field of electrostatic measurement. The fast static-electricity voltage testing probe adopts an electro-optic switching system with high insulation and impedance, and an additional photoconduction control system. Through alternative application of the electro-optical effect and internal photoelectric effect of crystal, and the adoption of periodic irradiation or breaking of white light, the insulation resistance of the crystal is changed thereby. The crystal then acts in measuring through electro-optic transducing and switching static shorts. The overall system can react fast over the variance conditions of electronic charge, and achieve an on-line inspection over the static voltages of insulating liquid and powder.

Description

The utility model belongs to the electrostatic measurement field, particularly belongs to the measurement of liquid or powder electrostatic electric charge.
In commercial production, the intrinsic insulation resistance of a lot of flammable liquid and powder is very high, produces friction, collision and absorption etc. owing to flow in production and course of conveying.Be easy to generate static charge, the continuous accumulation along with static charge may produce spark discharge, makes the burning of liquid or powder cause serious accidents such as fire and blast.If utilize means of testing to monitor the situation of generation of static electricity, and, can reduce the loss according to the adequate measures of how much taking that produce the quantity of electric charge.Development in recent years is got up goes a step further before utilizing the crystal current luminous effect that static charge is measured, yet this system can not quick and precisely measure the stored charge of flowing liquid or powder generation, this is owing to making the insulation resistance of crystal and sensor very high in order to reach the measurement purpose, generally greater than 10 12Ohm.And sensor in manufacturing process, usually all have several pico farads to the distributed capacitance of tens pico farads, like this sensor in sampling process, its voltage is the charge and discharge process of the bigger exponential form of time constant, when liquid or body of powder electrification amount changed, sensor needed the long period just can reach balance.Therefore, measuring system can not be followed the charge variation situation fast, can not directly apply to liquid or powder continuous on-line and measure.
The purpose of this utility model is the variation that makes the quantity of electric charge in electro optical measurement system rapid reaction liquid or the powder, can be suitable for continuous on-line detection.And electric light converter section diversity is contained in the metal Cylinder.
The utility model electrostatic potential measuring head is characterized in that adopting the blue light or the white light crystal (6) of the variation of one-period property, alternately utilizes the electrooptical effect and the photoconductive effect of same crystal (6).Adopt electrooptical effect to realize the conversion of electrostatic potential, and photoconductive effect is released the electric charge on the sensor fast, property performance period ground measuring process to light intensity.The used light wavelength of electrooptical effect is at ruddiness or region of ultra-red, and the photoconductive effect of crystal (6) is less in this zone, and crystal has higher insulation resistance, greater than 10 12Ohm makes static charge accumulation, reaches the output light intensity and changes with electrostatic potential.After electrostatic charge accumulates one given period, at this moment sensor not necessarily reaches maximal value, utilize photoconductive effect, open stronger blue light of light intensity or white light fast, keep measurement result simultaneously, the insulation resistance of crystal (6) is descended rapidly, and the rapid short circuit of static charge that sensor is accumulated bleeds off zero clearing.Service time is as the criterion to guarantee zero clearing.This process crystal is equivalent to a static short switch.When blue light or white light shutoff, the insulation resistance of crystal raises rapidly again and returns to electric light converted measurement process, so circulation is carried out, on same crystal, alternately use electrooptical effect and photoconductive effect, make crystal (6) promptly play the electric light transformation and played the static switching effect again, the problems of measurement that has promptly solved high input impedance has improved the speed of following of measuring system again.Thereby make measurement result promptly and accurately.Can improve the safety coefficient of the production and the transportation of iknsulating liquid or powder, can realize the continuous on-line detection of high iknsulating liquid or powder electrostatic lotus simultaneously, enhance productivity.
The utility model description of drawings is as follows:
Accompanying drawing is the schematic diagram of quick electrostatic potential measuring head.(1) is the LED light emitting diode, (2) (10) (11) are core diameter 50um light transmitting fiber, (3) and (9) be GRIN Lens, (4) (8) are the polarizer and analyzer, (5) be quarter wave plate, (6) are bismuth silicate (Bi12SiO20) crystal, are called for short BSO, (7) be the transparency electrode lead-in wire, connect the sensor power taking and press signal.(13) be photoelectric commutator, (14) are current-to-voltage converter, and (15) keep the digital watch of function for band.(17) be metal shell.(16) be time controller, (12) are blue light or white light source.
Be described in detail specific embodiments of the present utility model below in conjunction with accompanying drawing:
Adopt high brightness LED, wavelength 0.85 μ m, by core diameter is 50 μ m optical fiber (2), through GRIN Lens (3), focal length 20mm aperture 10mm, make light become directional light, the polarizer (4) makes natural light become linearly polarized light, quarter wave plate (5) makes linearly polarized light become the garden polarized light, the polarizer (4) rise folk prescription to BSO crystal (6) making alive after optical axis direction angle at 45, size 6 * 6 * 4mm of crystal (6), behind the light process BSO crystal (6), because the electrooptical effect of crystal becomes ellipse garden polarized light, the light with the electrostatic potential variation that process analyzer (8) detects is by condenser lens (9) and optical fiber (10), carry out opto-electronic conversion for detector PIN photoelectric tube (13), after amplifier (14) amplifies, to give to have the digital indicator (15) that keeps function, white light (12) shines BSO crystal (6) periodically by optical fiber (11).Open with trip time and control by controller (16).It is φ 40mm that most of optical element is encapsulated in external diameter, in the cylindrical metal housing (17) of long 100mm.Extraction electrode (7) is the polytetrafluoroethylene RVV, connects the sensor power taking and presses signal.

Claims (1)

1, a kind of quick electrostatic potential measuring head, by light source [1] [12] light transmitting fiber [2] [10] [11], BSO crystal [6] rises partially and analyzing system and photo-translating system [13] [14] [15] composition.It is characterized in that utilizing the blue light or the white light [12] that change periodically, make the insulation resistance cyclical variation of same BSO crystal [6], make crystal [6] promptly change again as the static short switch as electric light.
CN 92224700 1992-06-09 1992-06-09 Fast static-electricity voltage testing probe CN2123774U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN 92224700 CN2123774U (en) 1992-06-09 1992-06-09 Fast static-electricity voltage testing probe

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN 92224700 CN2123774U (en) 1992-06-09 1992-06-09 Fast static-electricity voltage testing probe

Publications (1)

Publication Number Publication Date
CN2123774U true CN2123774U (en) 1992-12-02

Family

ID=4967083

Family Applications (1)

Application Number Title Priority Date Filing Date
CN 92224700 CN2123774U (en) 1992-06-09 1992-06-09 Fast static-electricity voltage testing probe

Country Status (1)

Country Link
CN (1) CN2123774U (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103134964A (en) * 2013-01-28 2013-06-05 武汉理工大学 Static electricity optical fiber measurement appliance and measurement method
CN103163388A (en) * 2013-03-01 2013-06-19 江苏大学 Measuring method and measuring device of non-contact electrostatic spraying charge-to-mass ratios

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103134964A (en) * 2013-01-28 2013-06-05 武汉理工大学 Static electricity optical fiber measurement appliance and measurement method
CN103163388A (en) * 2013-03-01 2013-06-19 江苏大学 Measuring method and measuring device of non-contact electrostatic spraying charge-to-mass ratios

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PB01 Publication
C06 Publication
GR01 Patent grant
C14 Grant of patent or utility model
CB03 Change of inventor or designer information

Designer after: Wang Rongyi

Designer after: Xue Changchuan

Designer before: Wang Rongyi

C53 Correction of patent for invention or patent application
COR Change of bibliographic data

Free format text: CORRECT: DESIGNER; FROM: WANG RONGYI TO: WANG RONGYI; XUE ZHANGCHUAN

CF01 Termination of patent right due to non-payment of annual fee
C19 Lapse of patent right due to non-payment of the annual fee