CN207424111U - A kind of closed type non-contact hand-held electro static instrument based on electric-field sensor - Google Patents
A kind of closed type non-contact hand-held electro static instrument based on electric-field sensor Download PDFInfo
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- CN207424111U CN207424111U CN201720596085.3U CN201720596085U CN207424111U CN 207424111 U CN207424111 U CN 207424111U CN 201720596085 U CN201720596085 U CN 201720596085U CN 207424111 U CN207424111 U CN 207424111U
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Abstract
The utility model discloses a kind of closed type non-contact hand-held electro static instruments based on electric-field sensor, are related to electrostatic detection field.The utility model proposes hand-held electrostatic instrument include induction electrode, separation layer, sleeve, tail-hood, display screen, control button, spacing module and form hermetically sealed shell mechanism, internal stationary electric field sensing chip for sensor, signal processing circuit and battery.When not in use, protected outside bare electrode using shielding case.The utility model proposes the closed type non-contact hand-held electro static instrument based on electric-field sensor compared with conventional hand electro static instrument, using all-sealed structure, without exposed movable member, can be used in combustible and explosive area, fully ensure the safety of test environment and core sensing element, test is accurate.
Description
Technical field
The utility model is related to electrostatic monitoring technical field more particularly to a kind of closed type based on electric-field sensor is non-connects
Touch holds electro static instrument.
Background technology
Electrostatic hazard is a major safety risks in science and technology and production activity.It contacted between different material, be after separation
Electrostatic can be generated, generation is simple, is not easy to realize due to it, careless slightly to lead to major accident.According to statistics, American Electronic
Industry department causes damages up to 10,000,000,000 dollars every year because of electrostatic hazard, and Britain's electronic product loses caused by electrostatic every year
For 2,000,000,000 pounds, no less than 45% harm is because static discharge (ESD) causes in the defective work of Japan Electronics component
's.Static discharge may light some flammable objects and explode.For example, in petroleum and petrochemical fields, human body or equipment carry
The gas that the easy light fluid product of electrostatic volatilize, oil product, powder rub in storage and transport process with surrounding container, also easily production
Raw a large amount of electrostatic.In dust such as field of industrial production, the flammable explosive gas such as hydrogen, acetylene, gas, coal dust, aluminium powder, flour,
It is likely to set off an explosion because of electrostatic spark.In electronics industry, general MOS circuits and field-effect tube breakdown voltage are about
300V, however in dry season static electricity on human body up to tens thousand of volts, easily damage even damage semiconductor devices, so as to cause equipment
Failure.
Conventional contactless electrostatic tester includes electric pole type, capacitance-type vibration formula, field mill formula etc..Wherein, electric pole type electrostatic
Instrument is directly amplified the charge signal on single induction electrode by circuit, AD samplings, since charge signal is easily in electricity
Decay in road, the electro static instrument null offset is big, need to often return to zero, inconvenient for use.Capacitance-type vibration formula, field grind formula electro static instrument by shaking
Charge inducing on dynamic or rotation modulation induction electrode measures the electric field strength near electrical body, the electrostatic electricity of inverting electrical body
Pressure avoids charge inducing attenuation.However, these electrostatic testers are generally exposed outside by sensing chip for sensor, these are naked
Dew mobile unit is easily damaged in the adverse circumstances such as dust, also easily collides generation electric spark because of self friction or with the external world,
Cause security risk.
Utility model content
(1) technical problems to be solved
Conventional contactless electrostatic tester contains exposed movable member, it is difficult to the work under full of adverse circumstances such as dust
Make, inflammable and explosive Different high risk sites using when there are risks.The utility model proposes a kind of closed types based on electric-field sensor
Non-contact hand-held electro static instrument based on external induction electrode structure, promotes reliability and the sensitivity of electro static instrument.
(2) technical solution
A kind of closed type non-contact hand-held electro static instrument based on electric-field sensor, including electric-field sensor, induction electrode,
Separation layer and shell, the induction electrode, separation layer and shell form sealing structure, and the electric-field sensor is located at sealing structure
Interior, the induction electrode and electric-field sensor are isolated by the separation layer, and are connected and turned on by connecting line.
Preferably, the shell includes sleeve and tail-hood, the sleeve both ends open, its one end connection tail-hood, the other end
Separation layer is connected, the induction electrode is arranged on separation layer, and the separation layer is between induction electrode and sleeve.
Preferably, shielding case is further included, induction electrode can be isolated from the outside by the shielding case.
Preferably, the separation layer offers connecting hole, and the connecting line passes through connecting hole by the induction electrode and electricity
Field sensor connects.
Preferably, the electric-field sensor includes sensing chip for sensor, signal processing circuit and battery, the sensor
Sensitive chip is connected with induction electrode by connecting line.
Preferably, the separation layer sets spacing module；
The induction electrode opens up window, is passed to outflow for the signal of spacing module, window is sealed.
Preferably, the spacing module includes spacing module or range finder module；
The spacing module includes two laser lamps overlapped in pre-determined distance hot spot；
The range finder module is ultrasonic distance measuring module.
Preferably, window is opened up on the shell, for setting display unit, button or indicator light；
The display unit real-time display is tested electrostatic potential, battery capacity, measuring distance or alarm signal；
The button is enabled for controlling closed type non-contact hand-held electro static instrument switch, zeroing, gear switch or test；
The indicator light is used to show power supply or alarm condition.
Preferably, the shell is provided with battery wired charging interface, wireless charging module or signal output interface.
Preferably, the separation layer is more than 10 for resistivity8The insulating materials of Ω cm；
The sleeve is metal or semiconductor anti-static material；
The shielding case is metal or semiconductor anti-static material；
The connecting line is conductor or semi-conducting material.
(3) advantageous effect
The utility model proposes a kind of novel seal to promote the security of hand-held electro static instrument, reliability and sensitivity
Type structure introduces the critical components such as induction electrode, separation layer, has the advantages that：
Sealing structure is formed by induction electrode, separation layer, sleeve, tail-hood etc., electric-field sensor is sealed in cavity
Portion avoids transducer sensitive structure from being influenced by external severe test environment and damages.
Transducer sensitive structure work when movable member it is not direct contacted with test environment, avoid movable structure collide
Electric spark is generated to ignite test environment.
In addition, by induction electrode structure, the induction area of sensor is increased, improves sensitivity.
Description of the drawings
Fig. 1 is a kind of closed type non-contact hand-held electrostatic based on electric-field sensor according to the utility model embodiment
The diagrammatic cross-section of instrument.
【Symbol description】
1- electric-field sensor sensing elements, 2- signal processing circuits, 3- supplying cells, 4- connecting lines, 5- induction electrodes, 6-
Separation layer, 7- sleeves, 8- tail-hoods, 9- shielding cases.
Specific embodiment
For the purpose of this utility model, technical solution and advantage is more clearly understood, below in conjunction with specific embodiment, and
Referring to the drawings, the utility model is described in further detail.
It should be noted that in attached drawing or specification description, similar or identical part all uses identical figure number.It is attached
The realization method for not illustrating or describing in figure is form known to a person of ordinary skill in the art in technical field.In addition, though this
Text can provide the demonstration of the parameter comprising particular value, it is to be understood that parameter is worth accordingly without being definitely equal to, but can connect
The error margin received is similar to be worth accordingly in design constraint.In addition, the direction term mentioned in following embodiment, such as
" on ", " under ", "front", "rear", "left", "right" etc. are only the directions of refer to the attached drawing.Therefore, the direction term used be for
Illustrate not to be used for limiting the utility model.
A kind of closed type non-contact hand-held electro static instrument based on electric-field sensor is provided in the utility model embodiment.
Including electric-field sensor sensing element 1, signal processing circuit 2, supplying cell 3, connecting line 4, induction electrode 5, separation layer 6, set
Cylinder 7, tail-hood 8 and shielding case 9, in addition, it may further comprise display screen, control button, spacing module etc..
Induction electrode 5, separation layer 6, sleeve 7 and tail-hood 8 form hermetically sealed shell mechanism, and internal stationary electric field sensor is quick
Sense chip 1, signal processing circuit 2 and supplying cell 3.When not in use, 5 outside of induction electrode is protected using shielding case 9.
Each constituent element of the present embodiment closed type non-contact hand-held electro static instrument is described in detail individually below.
Electric-field sensor sensing element 1 is electrostatic field sensor or AC electric field sensor, including being prepared using micro-nano processing technology
Micro mechanical structure chip, microelectronics sensitive chip, optical sensitive chip or the capacitance-type vibration formula based on piezoelectric ceramics formed,
Or field mill formula electric field instrument.
Signal processing circuit 2 is used to provide the necessary pumping signal of work to electric-field sensor sensing element 1, and by electric field
The output signal progress current-voltage conversion of sensor sensing element 1, amplification, A/D samplings, Digital Signal Processing, data are real-time
Storage, Data Over Cable and wireless transmission etc., signal processing circuit may include wireless signal transmitting module, local datastore mould
Block.
Supplying cell 3 connects signal processing circuit 2, can be dry cell, lithium battery, Ni-MH battery etc..
Connecting line 4 is used to connect electric-field sensor sensing element 1 and induction electrode 5.Connecting line is plain conductor or partly leads
Body material does not have conduction to be connected with other component inside non-contact hand-held electro static instrument, can if can not avoid being physically contacted
Increase insulant on the contact point of connecting line 4.
Induction electrode 5 is fixed on separation layer 6, can be threaded connection, screw fixation solder welding or glue therebetween
It is viscous, to enhance sealing effect.Induction electrode is exposed outside, for sensing electrostatic signal, induction electrode inner surface and electric field sensing
Device sensitive chip directly or using conductor/semiconductor is connected.Window can be left on induction electrode 5, for the signal of spacing module
Incoming outflow, window are sealed using glass or transparent plastic.Induction electrode 5 is metal material or antistatic material.
Separation layer 6 is arranged between induction electrode and sleeve, resistivity is not small for connecting induction electrode 5 and sleeve 7
In 108Ω/cm.Separation layer center drilling penetrates convenient for connecting line 4.It can be with fixed range at center drilling on separation layer 6
Module.Spacing module does not have the physical contact of the conductance general character with induction electrode 5.Spacing module is by signal processing circuit 2 or power supply electricity
Pond 3 powers, and communicates with signal processing circuit 2, and spacing module includes two kinds of spacing module and range finder module, wherein, spacing
Module can be two laser lamps overlapped in pre-determined distance hot spot, two outside light beams can be sent, when two light beams are in quilt
It surveys plane to overlap, non-contact hand-held electro static instrument reaches suitable measuring distance；The originals such as ultrasonic wave may be employed in range finder module
Reason carry out distance test, can real time reaction be tested the distance between plane and hand-held electro static instrument, pass through spacing module and electric field
The real-time output of sensor sensing element calculates tested planar electrostatic current potential, can determine to hold by curve-fitting method or look-up table
Electro static instrument is in the sensitivity of different measuring distances.In addition, also can measuring distance be determined by the gage of preset length.Gage can be with
It, can be by the way that button be set to carry out gear and sensitivity switching on sleeve for different lengths.
The fixed separation layer 6 in the top of sleeve 7, fixing means has threaded connection, screw to fix, solder weld, gluing etc. is with guarantor
Card sealing.7 inside installation electric-field sensor sensing element 1 of sleeve, signal processing circuit 2 and supplying cell 3.According to using need
It asks, window can be opened up on sleeve or tail-hood, display unit, button, indicator light etc. are set.Wherein, liquid can be selected in display unit
Crystal display, OLED display, light-emitting diode display etc., for showing tested voltage, measuring distance, battery capacity, warning message
Deng.Button realizes the functions such as switch, zeroing, gear switch, test enabled (HOLD).Indicator light shows electro static instrument power supply, alarm
Situations such as.Sleeve 7 is metal material or antistatic material.
The methods of tail-hood 8 is connected through a screw thread, screw is fixed, solder welds, gluing sealing is fixed on 7 bottom of sleeve, is
Metal material or antistatic material.Battery charging interface, signal output interface, wireless charging module etc. can be fixed on tail-hood 8.Its
In, the ground terminal of battery charging interface and signal output interface can be used as the ground interface of hand-held electrometer.
The methods of shielding case 9 is connected through a screw thread, bayonet is fixed on 7 top of sleeve, and induction electrode 5, separation layer 6 are covered
Firmly.When not testing, shielding case 9 is installed on sleeve 7, protects exposed induction electrode.In addition, before zeroing, can also install
Shielding case 9 is used to generate zero point field.
In addition, so it is easy to understand that this patent propose non-contact hand-held electro static instrument can be not only used for measurement human body,
The electrostatic potential that object carries, can also directly display the electric field value measured by electric-field sensor, based on alternating electric field sensor
And corresponding signal processing circuit, it can be used for measurement alternating electric field, alternating voltage signal.
The utility model proposes the closed type non-contact hand-held electro static instrument based on electric-field sensor use hermetically sealed knot
Electric-field sensor is sealed in inside cavity by structure, and transducer sensitive structure is avoided to be influenced by external severe test environment and is damaged.
Transducer sensitive structure work when movable member it is not direct contacted with test environment, protect core sensing element from severe ring
Border influences, and avoids movable structure collision and generates electric spark and ignite test environment, can be used in combustible and explosive area, fully guarantor
Hinder the safety of test environment and core sensing element, test is accurate.In addition, by induction electrode structure, sensor is increased
Induction area improves sensitivity.
Electric-field sensor includes MEMS electric-field sensors, capacitance-type vibration formula electric-field sensor, optical electric field sensor, field mill
Formula electric-field sensor.So far, a kind of closed type based on electric-field sensor of the attached drawing to the utility model embodiment is had been combined
Non-contact hand-held electro static instrument is described in detail.According to above description, those skilled in the art should be to the utility model
Electric-field sensor package assembling has clear understanding.In addition, the above-mentioned definition to each element is not limited in embodiment
The various concrete structures or shape mentioned, those of ordinary skill in the art can replace while it is simply known.For example,
The hand-held electrometer that this patent proposes can be the different shapes such as cylinder or cuboid.
Particular embodiments described above has carried out into one the purpose of this utility model, technical solution and advantageous effect
Step is described in detail, it should be understood that the foregoing is merely specific embodiment of the utility model, are not limited to this reality
With new, within the spirit and principle of the utility model, any modification, equivalent substitution, improvement and etc. done should all include
Within the scope of protection of the utility model.
Claims (9)
1. a kind of closed type non-contact hand-held electro static instrument based on electric-field sensor, which is characterized in that including electric-field sensor,
Induction electrode, separation layer and shell, the induction electrode, separation layer and shell form sealing structure, the electric-field sensor position
In in sealing structure, the induction electrode and electric-field sensor are isolated by the separation layer, and are connected and turned on by connecting line；
The shell includes sleeve and tail-hood, the sleeve both ends open, and its one end connects tail-hood, and the other end connects separation layer,
The induction electrode is arranged on separation layer, and the separation layer is between induction electrode and sleeve.
2. closed type non-contact hand-held electro static instrument as described in claim 1, which is characterized in that shielding case is further included, it is described
Induction electrode can be isolated from the outside by shielding case.
3. closed type non-contact hand-held electro static instrument as claimed in claim 1 or 2, which is characterized in that the separation layer opens up
There is connecting hole, the induction electrode is connected by the connecting line through connecting hole with electric-field sensor.
4. closed type non-contact hand-held electro static instrument as claimed in claim 1 or 2, which is characterized in that the electric-field sensor
Including sensing chip for sensor, signal processing circuit and battery, the sensing chip for sensor passes through connecting line with induction electrode
Connection.
5. closed type non-contact hand-held electro static instrument as claimed in claim 3, which is characterized in that the separation layer sets distance
Module；
The induction electrode opens up window, is passed to outflow for the signal of spacing module, window is sealed.
6. closed type non-contact hand-held electro static instrument as claimed in claim 5, which is characterized in that the spacing module includes fixed
Away from module or range finder module；
The spacing module includes two laser lamps overlapped in pre-determined distance hot spot；
The range finder module is ultrasonic distance measuring module.
7. closed type non-contact hand-held electro static instrument as claimed in claim 1 or 2, which is characterized in that opened up on the shell
Window, for setting display unit, button or indicator light；
The display unit real-time display is tested electrostatic potential, battery capacity, measuring distance or alarm signal；
The button is enabled for controlling closed type non-contact hand-held electro static instrument switch, zeroing, gear switch or test；
The indicator light is used to show power supply or alarm condition.
8. closed type non-contact hand-held electro static instrument as claimed in claim 1 or 2, which is characterized in that the shell is provided with
Battery wired charging interface, wireless charging module or signal output interface.
9. closed type non-contact hand-held electro static instrument as claimed in claim 2, which is characterized in that
The separation layer is more than 10 for resistivity8The insulating materials of Ω cm；
The sleeve is metal or semiconductor anti-static material；
The shielding case is metal or semiconductor anti-static material；
The connecting line is conductor or semi-conducting material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720596085.3U CN207424111U (en) | 2017-05-25 | 2017-05-25 | A kind of closed type non-contact hand-held electro static instrument based on electric-field sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720596085.3U CN207424111U (en) | 2017-05-25 | 2017-05-25 | A kind of closed type non-contact hand-held electro static instrument based on electric-field sensor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207424111U true CN207424111U (en) | 2018-05-29 |
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ID=62397848
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720596085.3U Active CN207424111U (en) | 2017-05-25 | 2017-05-25 | A kind of closed type non-contact hand-held electro static instrument based on electric-field sensor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207424111U (en) |
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2017
- 2017-05-25 CN CN201720596085.3U patent/CN207424111U/en active Active
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