CN101784153B - Human body electrostatic discharge alarm apparatus - Google Patents
Human body electrostatic discharge alarm apparatus Download PDFInfo
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- CN101784153B CN101784153B CN 201010112731 CN201010112731A CN101784153B CN 101784153 B CN101784153 B CN 101784153B CN 201010112731 CN201010112731 CN 201010112731 CN 201010112731 A CN201010112731 A CN 201010112731A CN 101784153 B CN101784153 B CN 101784153B
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Abstract
The invention discloses a human body electrostatic discharge alarm apparatus, which comprises a static sub-conductor, a voltage detecting module, an A/D conversion module, a controller and an alarm module, which are sequentially connected to form a static detecting loop. The static sub-conductor is grounded through the voltage detecting module to form an electrostatic discharge loop. The alarm module comprises a buzzer and an indicating lamp. Because the static sub-conductor is made from a static sub-conducting material and the specific resistance of the static sub-conducting material is relatively high, the alarm apparatus can prolong the discharge and reliably inhibit the electrostatic discharge energy and does not generate electric shock and spark discharge. The method improves electrostatic discharge comfort of a user in a discharge process and also prevents the happening of fire or explosion caused by the spark discharge.
Description
Technical field
The present invention relates to a kind of static electricity on human body's detection, releasing device, a kind of specifically human body electrostatic discharge alarm apparatus.
Background technology
In recent years, in the time of industry high speed developments such as China's oil chemical industry, corresponding production accident has also got into the stage occurred frequently, eliminates static and especially avoids sparkover to seem particularly important, becomes very important important step.In order to prevent and reduce static electricity on human body's harm, people have carried out deep research to the electrostatic hazard and the management in inflammable, explosive deathtrap and antistatic place, have developed various static electricity on human body's cancellation element.
Because it is more prevalent that people wear the man-made fabric clothes, and man-made fabric very easily produces static.The oil depot staff is on getting into light oil pump house, tank deck and during the operation area, and static exceeds standard and then probably when contacting metal, strikes sparks, and produces sparkover.For preventing that the issuable spark of static from avoiding sparkover, need to get on light oil pump house, the light oil tank deck, the operating platform of light oil operation area, and on the staircase located such as explosion hazard area or porch is provided with the device of eliminating the static electricity on human body.
At present, the static eraser of extensive use all is to adopt the mode of metallic conductor ground connection discharge to eliminate the static electricity on human body.This mode exists utmost point short time static discharge energy bigger inevitably; Sparking easily; The possibility that causes human body electric shock and initiation fire explosion accident, and existing mode all can not detect and whether the static that reflects human body intuitively discharges fully fully, has great potential safety hazard.
Summary of the invention
The object of the present invention is to provide a kind of human body electrostatic discharge alarm apparatus, this alarm has advantage simple in structure, safe in utilization, comfortable.
The present invention is for realizing above-mentioned purpose, and the technical solution of employing is:
Human body electrostatic discharge alarm apparatus comprises electrostatic subconductor, voltage detection module, signal amplification module, A/D modular converter, controller and alarm module; Aforementioned each parts connect and compose electrostatic pressure successively and detect the loop, and electrostatic subconductor constitutes static through voltage detection module ground connection and discharges the loop.
Above-mentioned alarm module comprises buzzer and indicator light.
Above-mentioned human body electrostatic discharge alarm apparatus also comprises guide rod, and the guide rod top is provided with leads the static body, and guide rod is equipped with sleeve outward, and the compression spring is set between guide rod and the sleeve, and guide rod can move up and down along sleeve; Lead the static body and connect the upper end of compressing spring through lead, compression spring lower end connects electrostatic subconductor through lead.
Above-mentioned guide rod periphery is provided with protuberance, and sleeve is provided with the recess suitable with protuberance.
Above-mentioned guide rod below is provided with trigger, and lower end of the guide rod contacts with the trigger point of trigger.
Above-mentioned guide rod below is provided with body case of annunciator, and trigger, electrostatic subconductor, voltage detection module, signal amplification module, A/D modular converter, controller and alarm module all are arranged in the body case of annunciator.
Above-mentioned body case of annunciator below connects conductive stud, and the conductive stud lower end is provided with the installation leg.
Above-mentioned electrostatic subconductor, voltage detection module, signal amplification module, A/D modular converter, controller and alarm module all adopt epoxy resin to water envelope and handle.
Beneficial effect of the present invention:
1, electrostatic subconductor is applied to human body electrostatic discharge alarm apparatus,, can prolongs discharge time, can suppress the static discharge energy, can not produce electric shock and sparkover because that resistivity of material is led in the static Asia is bigger.This mode had both improved the comfort level of user's release electrostatic in the discharge process, the fire of having stopped again to produce because of sparkover or the generation of blast.
2, electrostatic pressure detects the loop, has sound and indicator light prompt facility, can judge in time that whether the static electricity on human body presses in safe range, makes sound and light alarm and points out when surpassing set point for electrostatic pressure.
3, lead the static body connects the compression spring through lead upper end; Compression spring lower end connects electrostatic subconductor through lead; The compression spring is as the part of lead in this structure, and the compression spring can greatly prolong the useful life of alarm as the deformation lead when pressing electrostatic subconductor.
4, the guide rod periphery is provided with protuberance, and sleeve is provided with the recess suitable with protuberance, leads the static body when preventing to use and rotates.
5, electrostatic subconductor, voltage detection module, signal amplification module, A/D modular converter, controller and alarm module adopt epoxy resin to water the envelope processing, have guaranteed the durability of product at abominable and corrosive atmosphere.
Description of drawings
Fig. 1 is the structural representation of human body electrostatic discharge alarm apparatus.
Fig. 2 is an A-A line cutaway view among Fig. 1.
Fig. 3 connects block diagram for the module that electrostatic pressure detects loop, static release loop.
Below in conjunction with accompanying drawing the present invention is elaborated:
Embodiment
In conjunction with Fig. 1 to Fig. 3, human body electrostatic discharge alarm apparatus comprises electrostatic subconductor, voltage detection module, signal amplification module, A/D modular converter, controller and alarm module; Aforementioned each parts connect and compose electrostatic pressure successively and detect the loop, and electrostatic subconductor constitutes static through voltage detection module ground connection and discharges the loop.Said alarm module comprises buzzer and indicator light.
Human body electrostatic discharge alarm apparatus also comprises guide rod 1, and guide rod 1 top is provided with leads static body 2, is equipped with sleeve 3 outside the guide rod 1, and compression spring 4 is set between guide rod 1 and the sleeve 3, and guide rod 1 can move up and down along sleeve 3.Guide rod 1 periphery is provided with protuberance 5, and sleeve 3 is provided with the recess 6 suitable with protuberance 5, and guide rod 1 all adopts insulating material with sleeve 3.Lead static body 2 and connect the upper end of compressing spring 4 through lead 7, compression spring 4 lower ends connect electrostatic subconductor through lead 8.
Guide rod 1 below is provided with trigger, and guide rod 1 lower end is lined with baffle plate 9, and baffle plate 9 contacts with the trigger point of trigger.Press when leading the static body when staff, lead static body 2, guide rod 1 and baffle plate 9 and move down the triggering trigger simultaneously, the starting resistor detection module begins to detect electrostatic pressure.Guide rod 1 below is provided with body case of annunciator 10, and electrostatic subconductor, trigger, voltage detection module, signal amplification module, A/D modular converter, controller and alarm module all are arranged in the body case of annunciator 10.For adapting to abominable and corrosive atmosphere, electrostatic subconductor, voltage detection module, signal amplification module, A/D modular converter, controller and alarm module adopt epoxy resin to water envelope and handle.Body case of annunciator 10 belows connect conductive stud 11, and conductive stud 11 lower ends are provided with installs leg 12, earth connection one end connection leg, other end ground stud.Warning sign is installed on the conductive stud through two pieces of bolts.
In use, the user of service is leading hand on the static body, is higher than the safe voltage scope if human body institute static electrification is pressed; Then the indicator light red light is bright, buzzer warning, and simultaneously static discharges the loop and begins to lead and destatic; In electrostatic pressure drops to the safe voltage scope of setting; The indicator light green light is bright, and buzzer stops to report to the police, and the expression discharge finishes.
When human body electrostatic discharge alarm apparatus uses; Can directly fix on the ground through the installation leg under expansion bolt and the column; Can use the through hole on bolt and the column to be installed in the obvious place that wall, balustrade etc. are connected to the unit of ground wire, also can carry out reasonable arrangement and use according to user's demand and on-the-spot natural conditions.
Below in conjunction with the test calculated data, compare using electrostatic subconductor and two kinds of different products of normal conductor:
Electrostatic subconductor is that volume resistivity is greater than 1 * 10 under any condition
6Ω m is less than 1 * 10
10The material of Ω m and surface resistivity are greater than 1 * 10
7Ω m is less than 1 * 10
11The surface of solids of Ω m.
The material that electrostatic subconductor adopts was by the electro-insulating rubber that accounts for total weight 80%～85% and the acetylene carbon black that accounts for total weight 15%～20% under 130 ℃～140 ℃ temperature mixing 2～3 minutes; Be squeezed into laminar then through dual-screw-stem machine; Accomplish the modification of electro-insulating rubber material, process the electrostatic subconductor material.
The reason of sparkover: will the flashing discharge when electric field strength between two conductors surpasses breakdown strength.For parallel-plate or the very big face of radius of curvature, if the gap is 10mm, breakdown strength is about 3 * 10
3KV/m.If reduce in the gap, breakdown strength slightly increases thereupon.The conductor of discharge takes place, and all electric charges almost all get into spark, and promptly almost spark consumes all electrostatic energy.If on the discharge path between conductor and the earth resistance is arranged, spark energy will be worth less than this, but spark duration is longer.
When static electricity on human body's voltage reached 2000V, the discharge energy between human body and the normal conductor can reach 0.4mJ, and this is higher than the minimum ignition energy 0.2mJ of product vapour far away, and hydrogen minimum ignition energy 0.1mJ possesses the condition of initiation fire explosion accident fully.
The quantity of electric charge that discharge takes place between human body and conductor reaches 2 * 10
-7Just possibly feel electric shock when C is above.When body capacitance was 100pF, the about 3000V of people's bulk potential of electric shock took place.
When people's bulk potential during at 1000V and the electric shock degree of discharging between normal conductor be: feel and send faint discharging sound in the finger outside, when people's bulk potential reached 3000V, human body just had tangible electric-shock feeling, had by the sensation of pinprick, little painful.
Be lower than the 40%RH place in humidity, human body is easier to charged, generally, and the charged 2000V～5000V of human body.Make human body that the about 2000V～2500V of discharge voltage of electric-shock feeling arranged.
Most of body capacitances be 100pF～400pF (minority can reach 1000pF), human body energy storage 0.4mJ～2.5mJ (W=CV of charged 2000V～5000V
2/ 2, body capacitance is pressed 200pF and is calculated); Human body surface resistance 500 Ω～5000 Ω experiment showed, that human body shifts up to 80%～100% ground connection normal conductor body moment (about tens nanoseconds) discharge energy, are enough to light inflammable and explosive type of gas, oil gas etc.
Static discharge energy between conductor is calculated as follows:
In the formula: W---discharge energy, J;
C---the equivalent capacity between conductor, F;
V---the potential difference between conductor, V.
When W numerical value during greater than the minimum ignition energy of combustible, the danger of just igniting.
Press the charged 2000V of human body, body capacitance 200pF, calculating the human body energy storage is 0.4mJ, is far longer than minimum fire ignition energy 0.2mJ.
Energy discharges by following formula and calculates
In the formula: the U-----static electricity on human body presses V
I-----discharging current A
R-----discharge loop resistance Ω
T-----S discharge time
Energy discharges contrast table: (static electricity on human body presses 2000V)
| Normal conductor (100 Ω) | Electrostatic subconductor (gets minimum 1 * 10 6Ω) | |
| Discharge time (T) | 10nS | 0.1ms |
| Discharging current (I) | 20A | 20mA |
| The sparkover degree | Very easily | Difficult |
Can be seemed by above-mentioned data, static release loop discharges the static of human body through electrostatic subconductor, and slowly release electrostatic is released electrostatic safety.It is long to have a discharge time, and no tangible electric-shock feeling and pinprick sensation has improved the comfort level of user's release electrostatic in the discharge process in the discharge process.Discharging current reaches the scope of explosion-proof permission for a short time, the fire of having stopped to produce because of sparkover or the generation of blast.
Certainly, above-mentioned explanation is not to be limitation of the present invention, and the present invention also is not limited in above-mentioned giving an example, and variation, remodeling, interpolation or replacement that the technical staff in present technique field is made in essential scope of the present invention also should belong to protection scope of the present invention.
Claims (5)
1. human body electrostatic discharge alarm apparatus, it is characterized in that: said alarm comprises electrostatic subconductor, voltage detection module, signal amplification module, A/D modular converter, controller and alarm module; Aforementioned each parts connect and compose electrostatic pressure successively and detect the loop, and electrostatic subconductor constitutes static through voltage detection module ground connection and discharges the loop; Said human body electrostatic discharge alarm apparatus also comprises guide rod, and the guide rod top is provided with leads the static body, and guide rod is equipped with sleeve outward, and the compression spring is set between guide rod and the sleeve, and guide rod can move up and down along sleeve; Lead the static body and connect the upper end of compressing spring through lead, compression spring lower end connects electrostatic subconductor through lead; Said guide rod periphery is provided with protuberance, and sleeve is provided with the recess suitable with protuberance; Said guide rod below is provided with trigger, and lower end of the guide rod contacts with the trigger point of trigger.
2. human body electrostatic discharge alarm apparatus according to claim 1 is characterized in that: said alarm module comprises buzzer and indicator light.
3. human body electrostatic discharge alarm apparatus according to claim 1; It is characterized in that: said guide rod below is provided with body case of annunciator, and trigger, electrostatic subconductor, voltage detection module, signal amplification module, A/D modular converter, controller and alarm module all are arranged in the body case of annunciator.
4. human body electrostatic discharge alarm apparatus according to claim 3 is characterized in that: said body case of annunciator below connects conductive stud, and the conductive stud lower end is provided with the installation leg.
5. human body electrostatic discharge alarm apparatus according to claim 1 is characterized in that: said electrostatic subconductor, voltage detection module, signal amplification module, A/D modular converter, controller and alarm module all adopt epoxy resin to water envelope and handle.
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| Application Number | Priority Date | Filing Date | Title |
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| CN 201010112731 CN101784153B (en) | 2010-01-26 | 2010-01-26 | Human body electrostatic discharge alarm apparatus |
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| CN 201010112731 CN101784153B (en) | 2010-01-26 | 2010-01-26 | Human body electrostatic discharge alarm apparatus |
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| CN101784153B true CN101784153B (en) | 2012-12-19 |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102309814B (en) * | 2011-09-13 | 2014-02-26 | 青岛艾特仪器有限公司 | Human electrostatic discharge alarm device and alarm method |
| CN107196077B (en) * | 2017-07-12 | 2024-03-29 | 中国人民解放军63926部队 | Wall concealed-installation grounding terminal box and installation method thereof |
| CN109425419A (en) * | 2017-08-28 | 2019-03-05 | 奥豪斯仪器（常州）有限公司 | Electronic balance with static eliminating function |
| CN111787675B (en) * | 2020-06-11 | 2022-11-25 | 江西省标安安全设备有限公司 | Installation-free movable electrostatic releaser |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1714878A (en) * | 2005-07-04 | 2006-01-04 | 江苏东强股份有限公司 | Human body electrostatic eliminator |
| CN201324442Y (en) * | 2008-12-18 | 2009-10-14 | 青岛澳波泰克安全设备有限责任公司 | Human body static releasing alarm instrument |
| CN201684292U (en) * | 2010-01-26 | 2010-12-29 | 青岛澳波泰克安全设备有限责任公司 | Novel alarm for electrostatic discharge of human body |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1714878A (en) * | 2005-07-04 | 2006-01-04 | 江苏东强股份有限公司 | Human body electrostatic eliminator |
| CN201324442Y (en) * | 2008-12-18 | 2009-10-14 | 青岛澳波泰克安全设备有限责任公司 | Human body static releasing alarm instrument |
| CN201684292U (en) * | 2010-01-26 | 2010-12-29 | 青岛澳波泰克安全设备有限责任公司 | Novel alarm for electrostatic discharge of human body |
Non-Patent Citations (1)
| Title |
|---|
| JP特开2006-112809A 2006.04.27 |
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