CN102846322A - Split type vacuum electrostatic imprint extraction device and application method thereof - Google Patents

Split type vacuum electrostatic imprint extraction device and application method thereof Download PDF

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Publication number
CN102846322A
CN102846322A CN2012103463542A CN201210346354A CN102846322A CN 102846322 A CN102846322 A CN 102846322A CN 2012103463542 A CN2012103463542 A CN 2012103463542A CN 201210346354 A CN201210346354 A CN 201210346354A CN 102846322 A CN102846322 A CN 102846322A
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vacuum
vacuum chamber
vacuum pump
plastic sheeting
generation module
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CN102846322B (en
Inventor
史力民
姚力
李泰山
汤澄清
马越
董佳英
张翠玲
姜吉哲
李冀
李洪武
赵洵
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CHINA COLLEGE OF CRIMINAL POLICE
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CHINA COLLEGE OF CRIMINAL POLICE
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Abstract

The invention relates to a split type vacuum electrostatic imprint extraction device and an application method thereof. The extraction device comprises a power supply module, a high voltage electrostatic generation module and a vacuumizing structure. The power supply module is electrically connected with the high voltage electrostatic generation module and the vacuumizing structure. The high voltage electrostatic generation module is used for converting low voltage direct current power into high voltage direct current power for output via high frequency oscillation, so as to generate continuous direct current high voltage static electricity. The vacuumizing structure includes a vacuum chamber and a vacuum pump connected with the vacuum chamber, and the vacuum pump is connected with a control module. The inventive split type vacuum electrostatic imprint extraction device has diversified functions, and is portable, wide in application range, practical and high in performance-to-price ratio.

Description

A kind of split type vacuum static electricity vestige extraction apparatus and using method
Technical field
The present invention relates to a kind of split type vacuum static electricity vestige extraction apparatus and using method, belong to the criminal investigation field.
 
Background technology
At present, domestic existing company develops the static vacuum and writes the extraction apparatuses such as impression, fingerprint, can be used for dust footprint on the paper extraction, write manifesting of impression and fingerprint.During use, the paper that the scene is extracted places on the extraction apparatus, covers transparent electrostatic film and adds vacuum, then adds static the dust on the paper is transferred on the electrostatic film, the method for taking pictures with the black background printing opacity obtains that contrast is large, details clearly footwear print photo; Or adopt the static powder to manifest written trace and fingerprint after by vacuum and Electrostatic Treatment the paper; Similar technology is abroad also arranged and a certain amount of product release is arranged to China market.But the existing product 26S Proteasome Structure and Function is single, and part occurs for vacuum section and high-pressure electrostatic is Unified Global with mainframe box, can not work alone, and carries inconvenience, only limits to use at laboratory, is difficult to satisfy the site inspection needs, and expensive.
 
Summary of the invention
The present invention is directed to existing static vacuum and write the extraction apparatus above shortcomings such as impression, fingerprint, a kind of split type vacuum static electricity vestige extraction apparatus and using method are provided.
The technical scheme that the present invention solves the problems of the technologies described above is as follows: a kind of split type vacuum static electricity vestige extraction apparatus comprises supply module, high-pressure electrostatic generation module and Vacuuming structure, and described supply module is electrically connected respectively with between high-pressure electrostatic generation module and the Vacuuming structure; Described high-pressure electrostatic generation module is used for the mode of low-voltage DC by the higher-order of oscillation is converted to high voltage direct current output, thereby produces the high direct voltage static that continues; Described Vacuuming structure comprises vacuum chamber and the vacuum pump that links to each other with described vacuum chamber, and described vacuum pump links to each other with control module.
On the basis of technique scheme, the present invention can also do following improvement.
Further, described supply module is the direct current supply module, and described direct current supply module and high-pressure electrostatic generation module all are arranged in the portable vacuum pan, and described vacuum chamber is arranged on the bottom of portable vacuum pan.
Further, have a plurality of micropores on the lower surface of described vacuum chamber, have aspirating hole on the described portable vacuum pan, described aspirating hole links to each other with vacuum pump by exhaust tube.
Further, also comprise sealing ring, described sealing ring and sponge are arranged at the lower surface of vacuum chamber, described sponge is arranged in the sealing ring, the below of described vacuum chamber is provided with the Electrostatic Absorption film, described sponge is provided with electrode, and described electrode links to each other with high-pressure electrostatic generation module, is used for the high direct voltage static that high-pressure electrostatic generation module produces is applied to the Electrostatic Absorption film.
Further, also comprise control module and powder spraying structure, be electrically connected between described supply module and the control module, described control module is electrically connected respectively with between high-pressure electrostatic generation module, Vacuuming structure and the powder spraying structure; Described powder spraying structure comprises the static powder box and the box that dusts, and described static powder box is used for holding electrostatic powder, and an end links to each other with control module, and the other end links to each other with the box that dusts, and has the mouth of dusting on the described box that dusts.
Further, also comprise a casing, described supply module, control module and vacuum pump are arranged in the casing, and described vacuum pump is by being flexibly connected between jig and the casing; Described vacuum chamber is arranged on the casing, has a plurality of micropores on the upper surface of described vacuum chamber, has aspirating hole on the described vacuum chamber, and described aspirating hole links to each other with vacuum pump by exhaust tube; Described vacuum chamber is provided with on the plastic sheeting, and the described box that dusts covers on the plastic sheeting; The both sides of described casing top respectively are provided with a track, described track is provided with reciprocating corona electrode, described high-pressure electrostatic generation module links to each other with corona electrode, and described corona electrode is used for the high direct voltage static that high-pressure electrostatic generation module produces is applied to plastic sheeting by reciprocating motion.
Further, described supply module is direct current supply module or Alternating Current Power Supply module.
The present invention also provides a kind of technical scheme that solves the problems of the technologies described above as follows: a kind of using method of split type vacuum static electricity vestige extraction apparatus comprises: at first, vacuum pump is linked to each other with portable vacuum pan, again the Electrostatic Absorption film is placed on the surface of holding the trace object; Then, the portable vacuum pan that will have vacuum chamber covers on the Electrostatic Absorption film, with the hands brings pressure to bear on the portable vacuum pan again; Then, open vacuum pump, use vacuum pump that the air in the vacuum chamber is extracted out, when the Electrostatic Absorption film with hold between the trace object and to form the air negative pressure district, and when portable vacuum pan being adhere well to hold on the trace object, high-pressure electrostatic generation module is started working, and the high direct voltage static that produces is applied on the Electrostatic Absorption film by electrode, makes the dust traces of holding on the trace object to the Electrostatic Absorption film; At last, close vacuum pump, high-pressure electrostatic generation module quits work, and removes portable vacuum pan, start the Electrostatic Absorption film and be used for extracting the vestige that holds on the trace object.
The present invention also provides a kind of technical scheme that solves the problems of the technologies described above as follows: a kind of using method of split type vacuum static electricity vestige extraction apparatus comprises: at first, vacuum pump is connected in the casing, simultaneously vacuum chamber is placed on the casing, the soft object that will have again the dust footprint is placed on the vacuum chamber, and plastic sheeting is placed on the soft object with dust footprint; Then, open vacuum pump, use vacuum pump that the air in the vacuum chamber is extracted out, thereby vacuum chamber and have between the soft object of dust footprint and have the soft object of dust footprint and plastic sheeting between form the air negative pressure district, make plastic sheeting, have the soft object of dust footprint and the upper surface adsorbed close of vacuum chamber is in the same place; At last, high-pressure electrostatic generation module is started working, the high direct voltage static that produces is applied on the plastic sheeting by reciprocating corona electrode, closes vacuum pump, high-pressure electrostatic generation module quits work, open and take off plastic sheeting and be used for extracting dust footprint on the soft object.
The present invention also provides a kind of technical scheme that solves the problems of the technologies described above as follows: a kind of using method of split type vacuum static electricity vestige extraction apparatus comprises: at first, vacuum pump is connected in the casing, simultaneously vacuum chamber is placed on the casing, to leave the paper of writing impression or impression of the hand again and be placed on the vacuum chamber, plastic sheeting is placed on and leaves on the paper of writing impression or impression of the hand; Then, open vacuum pump, use vacuum pump that the air in the vacuum chamber is extracted out, thereby at vacuum chamber and leave between the paper of writing impression or impression of the hand and leave the paper of writing impression or impression of the hand and plastic sheeting between form the air negative pressure district, make plastic sheeting, leave the paper of writing impression or impression of the hand and the upper surface adsorbed close of vacuum chamber is in the same place; Then, high-pressure electrostatic generation module is started working, and the high direct voltage static that produces is applied on the plastic sheeting by reciprocating corona electrode, closes vacuum pump, high-pressure electrostatic generation module quits work; Then, the box that will dust is located at and is provided with plastic sheeting and leaves on the vacuum chamber table top of the paper of writing impression or impression of the hand, open the switch that dusts, the air of extracting out from vacuum chamber enters the static powder box, blow the static powder it is ejected on the plastic sheeting from the mouth that dusts on the box that dusts, the showing trace on plastic sheeting is out turned off the switch that dusts afterwards; At last, open the box that dusts, open and take off plastic sheeting and be used for to extract and to write impression or impression of the hand on the paper.
The invention has the beneficial effects as follows: the split type vacuum static electricity vestige of the present invention extraction apparatus has several functions, is a kind of portable, applicable extraction equipment that Object range is wide, practicality good, cost performance is high, has particularly following beneficial effect:
1, adopts split (combination) formula structure, but the Offhost case independently uses and works to make vacuum section and high-pressure electrostatic occur partly all, and parameter and the performance of work do not change, this has strengthened portability and the practicality of this equipment greatly, this equipment can not only be used at laboratory, also can take on the scene of a crime and use, can effectively improve extraction ratio and the checkability of on-the-spot vestige.
2, the hermetic unit of the vacuum chamber of this portable devices module adopts soft encapsulant, and cost is low, good sealing effect, applicable object are extensive.
3, strengthen the area of vacuum platform, make this equipment more be fit to the extraction of the larger vestiges such as footprint, the powder injection hole of equipment adopts multidirectional structure, and by radiation around the middle mind-set, the powder injection hole aperture is tiny, dusts more even.
4, the high-voltage electrostatic generator on the casing (corona mechanism) carries with track, track is positioned at both sides, casing top, track is provided with corona electrode, and generation high-pressure electrostatic, compare with the airsick structure of hand-held electric, both guarantee output and the extraction effect of high-pressure electrostatic, improved again the safety of operation.
5, this equipment has adopted novel machinery and electrical equipment raw material, accessory, has improved convenience and the reliability of equipment operating
Description of drawings
Fig. 1 is the structural representation of the split type vacuum static electricity vestige of the present invention extraction apparatus embodiment one;
Fig. 2 is the circuit structure diagram of the split type vacuum static electricity vestige of the present invention extraction apparatus embodiment one;
Fig. 3 is the structural representation of the split type vacuum static electricity vestige of the present invention extraction apparatus embodiment two.
 
The specific embodiment
Below in conjunction with accompanying drawing principle of the present invention and feature are described, institute gives an actual example and only is used for explaining the present invention, is not be used to limiting scope of the present invention.
Embodiment 1
Shown in Fig. 1 and 2, described split type vacuum static electricity vestige extraction apparatus comprises supply module 7, high-pressure electrostatic generation module 8, Vacuuming structure, control module, powder spraying structure and casing 3, be electrically connected between described supply module 7 and the control module, described control module is electrically connected respectively with between high-pressure electrostatic generation module 8, Vacuuming structure and the powder spraying structure.Described control module is comprised of the power control switch of each module and the static powder box switch that dusts.The power control part of each module adopts touch switch; The static powder box switch that dusts adopts electromagnetic valve 4 controls, when electromagnetic valve 4 is opened, the air of being extracted out by vacuum chamber directly enters the static powder box through electromagnetic valve, blow the static powder, make it mouthful ejection of dusting from the box that dusts, when closed electromagnetic valve, discharge from the another one passage from the air that vacuum chamber is extracted out.
Described high-pressure electrostatic generation module 8 is used for the mode of low-voltage DC by the higher-order of oscillation is converted to high voltage direct current output, thereby produce the high direct voltage static that continues, so both can continue to produce high direct voltage static, and can make again whole electrostatic generator have smaller volume.Described Vacuuming structure comprises vacuum chamber 1 and the vacuum pump 5 that links to each other with described vacuum chamber 1, and described vacuum pump 5 links to each other with control module; Described powder spraying structure comprises static powder box 6 and the box 9 that dusts, and described static powder box 6 is used for holding electrostatic powder, and an end links to each other with control module, and the other end links to each other with the box 9 that dusts, and has the mouth 10 that dusts on the described box 9 that dusts.Described supply module 7, control module and vacuum pump 5 are arranged in the casing 3, and described vacuum pump 5 is by being flexibly connected between jig and the casing 3; Described vacuum chamber 1 is arranged on the casing 3, has a plurality of micropores on the upper surface of described vacuum chamber 1, has aspirating hole on the described vacuum chamber 1, and described aspirating hole links to each other with vacuum pump 5 by exhaust tube; Described vacuum chamber is provided with on the plastic sheeting, and the described box 9 that dusts covers on the plastic sheeting.The both sides of described casing 3 tops respectively are provided with a track, described track is provided with reciprocating corona electrode 2, described high-pressure electrostatic generation module 8 links to each other with corona electrode, and described corona electrode is used for the high direct voltage static that high-pressure electrostatic generation module 8 produces is applied to plastic sheeting by reciprocating motion.Described supply module is direct current supply module or Alternating Current Power Supply module, and the civil power that both can use 220V also can adopt aneroid battery (6V) as working power as power supply.This function of HV generator both can be used at laboratory like this, also can be at outdoor scene uses during without civil power.
Vacuum pump adopts domestic Miniature vacuum pump without oil, (design parameter: 0.5 liter/second of capacity, final vacuum :≤180 holders, rotating speed: 2800 rev/mins, power of motor: 60 watts, volume is: 245mm (length) * 175mm(is wide) * 120mm(is high)) both guaranteed to make the requirement of vacuum again the volume of vacuum pump reduce to minimum, thereby reached portable purpose; Adopt split-type design between vacuum pump and the casing simultaneously, utilize jig that vacuum pump is fixed on the engine housing, open jig and vacuum pump can be taken out, extract plate with the portable dust footprint of embodiment 3 and be used in combination, both reduce cost, realized again a tractor serves several purposes.
Vacuum chamber is made by the thick aluminium alloy plate of 3mm, long 420mm, wide 260mm, height 15mm; Bleed evenly in order to make, its upper surface has the micropore of 1200 diameter 0.2mm; Its lower surface has aspirating hole to link to each other with the exhaust tube of vacuum pump.When the vacuum room air is extracted in covered with plastic film above the vacuum chamber and vacuum pump work out, just formed the air negative pressure district at the upper surface of vacuum chamber.
The box that dusts mainly works the effect of shrouding, and prevents from dispersing air from mouthful static powder of ejection that dusts.
The using method of the vestige extraction apparatus of this embodiment comprises: at first, vacuum pump is connected in the casing, simultaneously vacuum chamber is placed on the casing, to leave the paper of writing impression or impression of the hand is placed on the vacuum chamber (wherein again, write impression or impression of the hand faces up), plastic sheeting is placed on and leaves on the paper of writing impression or impression of the hand, cuts redundance; Then, open vacuum pump, use vacuum pump that the air in the vacuum chamber is extracted out, thereby at vacuum chamber and leave between the paper of writing impression or impression of the hand and leave the paper of writing impression or impression of the hand and plastic sheeting between form the air negative pressure district, make plastic sheeting, leave the paper of writing impression or impression of the hand and the upper surface adsorbed close of vacuum chamber is in the same place; Then, high-pressure electrostatic generation module is started working, and the working time is 8~10 seconds, and the high direct voltage static that produces is applied on the plastic sheeting by reciprocating corona electrode, closes vacuum pump, high-pressure electrostatic generation module quits work; Then, the box that will dust is located at and is provided with plastic sheeting and leaves on the vacuum chamber table top of the paper of writing impression or impression of the hand, opening the switch that dusts (adds in the static powder box before manifesting and shows that powder is no less than whole volume 1/3, as the quantity not sufficient of dusting can be turned off the table top vacuum switch), the air of extracting out from vacuum chamber enters the static powder box, blow the static powder it is ejected on the plastic sheeting from the mouth that dusts on the box that dusts, the showing trace on plastic sheeting is out turned off the switch that dusts afterwards; At last, open the box that dusts, open and take off plastic sheeting, as the quantity not sufficient of dusting can turn off the table top vacuum switch, be used for extracting and write impression or impression of the hand on the paper.
Embodiment 2
The structure of the structure of this embodiment and embodiment 1 is basically the same, be exactly when in use, box need not dust, concrete using method is: at first, vacuum pump is connected in the casing, simultaneously vacuum chamber is placed on the casing, the soft object that will have again a dust footprint is placed on the vacuum chamber (wherein, footprint is left over the surface upwards), plastic sheeting is placed on the soft object with dust footprint, cuts redundance; Then, open vacuum pump, use vacuum pump that the air in the vacuum chamber is extracted out, thereby vacuum chamber and have between the soft object of dust footprint and have the soft object of dust footprint and plastic sheeting between form the air negative pressure district, make plastic sheeting, have the soft object of dust footprint and the upper surface adsorbed close of vacuum chamber is in the same place, with eliminating bubbles such as cotton balls, smooth the film surface wrinkle; At last, high-pressure electrostatic generation module is started working, working time is 8~10 seconds, the high direct voltage static that produces is applied on the plastic sheeting by reciprocating corona electrode, close vacuum pump, high-pressure electrostatic generation module quits work, open and take off plastic sheeting, take a picture and fix and thin film is kept properly, be used for extracting the dust footprint on the soft object.
Embodiment 3
As shown in Figure 3, described split type vacuum static electricity vestige extraction apparatus comprises portable vacuum pan, described portable vacuum pan is provided with supply module 12 and high-pressure electrostatic generation module 11, the bottom of described portable vacuum pan is vacuum chamber 13, has aspirating hole on the described portable vacuum pan, described aspirating hole links to each other with vacuum pump by exhaust tube, and described supply module 12 links to each other with control module, and described control module is electrically connected respectively with between high-pressure electrostatic generation module 11 and the vacuum pump; Described high-pressure electrostatic generation module 11 is used for the mode of low-voltage DC by the higher-order of oscillation is converted to high voltage direct current output, thereby produces the high direct voltage static that continues.The lower surface of described vacuum chamber is provided with sealing ring and sponge, described sponge is arranged in the sealing ring, the below of described vacuum chamber is provided with the Electrostatic Absorption film, described sponge is provided with electrode, described electrode links to each other with high-pressure electrostatic generation module, be used for the high direct voltage static that high-pressure electrostatic generation module produces is applied to the Electrostatic Absorption film, described sealing ring is the Air Flow between isolated vacuum chamber and the external world.Described sealing ring adopts a kind of textile rubber layer and air-locked soft textile such as rain repellent silk class that scribbles, and has obtained good sealing effectiveness, and all applicable to the hard ground of routine such as cement flooring, floor, floor tile, marble, flooring laminate etc.
The structure of vacuum chamber is just the same among the structure of this embodiment vacuum chamber and the embodiment 1, made by the aluminium alloy plate that 3mm is thick, and long 420mm, wide is 260mm, highly is 15mm; Bleed evenly in order to make, it is the micropore of 0.2mm that its upper surface has 1200 diameters.
The structure of the HV generator also structure with embodiment 1 mesohigh electrostatic generator is the same, adopt the mode of the higher-order of oscillation that low-voltage DC is converted to high voltage direct current output, so both can continue to produce high direct voltage static, and can make again whole electrostatic generator have smaller volume.
Described supply module is the direct current supply module, described direct current supply module and high-pressure electrostatic generation module all are arranged in the portable vacuum pan, described vacuum chamber is arranged on the bottom of portable vacuum pan, have a plurality of micropores on the lower surface of described vacuum chamber, have aspirating hole 14 on the described portable vacuum pan, described aspirating hole links to each other with vacuum pump by exhaust tube.Battery case and handle combine, and the unidirectional current of 6V both can be provided for HV generator, can reduce unnecessary member again, weight reduction and reduced volume.
The vestige extraction apparatus of this embodiment has another name called portable footprint and extracts plate, to integrate static and vacuum function, vacuum pump among it and the embodiment 1 is used in combination, vacuum pump is extracted the air in the vacuum chamber out and is formed negative pressure, make the extraction plate tightly be attached at ground, the recycling high-pressure electrostatic adsorbs the dust footprint, thereby improves the extraction effect of footprint.
The using method of the vestige extraction apparatus of this embodiment comprises: at first, vacuum pump is linked to each other with portable vacuum pan, again the Electrostatic Absorption film is placed on and holds trace object (footprint or fingerprint on the object that can not move arbitrarily such as ground etc., black side contacts with footprint, gets final product greater than footprint) the surface; Then, the portable vacuum pan that will have vacuum chamber covers on the Electrostatic Absorption film, then, screws out ground wire and inhales in grounded metal surface or connection, with the hands brings pressure to bear on the portable vacuum pan again; Then, open vacuum pump, use vacuum pump that the air in the vacuum chamber is extracted out, when the Electrostatic Absorption film with hold between the trace object and to form the air negative pressure district, and when portable vacuum pan being adhere well to hold on the trace object, high-pressure electrostatic generation module is started working, and the electrode that the high direct voltage static that produces is provided with by sponge is applied on the Electrostatic Absorption film, working time is 8~10 seconds, makes the dust traces of holding on the trace object to the Electrostatic Absorption film; At last, close vacuum pump, high-pressure electrostatic generation module quits work, and removes portable vacuum pan, starts the Electrostatic Absorption film, the vestige that shows is held vestige on the trace object with taking a picture fixing and thin film being kept properly for extraction.When without the 220V power supply, then directly use portable vacuum cup to extract, the method for extracting footprint is the same, but can not carry out vacuum pumping.
The above only is preferred embodiment of the present invention, and is in order to limit the present invention, within the spirit and principles in the present invention not all, any modification of doing, is equal to replacement, improvement etc., all should be included within protection scope of the present invention.

Claims (10)

1. a split type vacuum static electricity vestige extraction apparatus is characterized in that, comprise supply module, high-pressure electrostatic generation module and Vacuuming structure, described supply module is electrically connected respectively with between high-pressure electrostatic generation module and the Vacuuming structure; Described high-pressure electrostatic generation module is used for the mode of low-voltage DC by the higher-order of oscillation is converted to high voltage direct current output, thereby produces the high direct voltage static that continues; Described Vacuuming structure comprises vacuum chamber and the vacuum pump that links to each other with described vacuum chamber, and described vacuum pump links to each other with control module.
2. split type vacuum static electricity vestige extraction apparatus according to claim 1, it is characterized in that, described supply module is the direct current supply module, and described direct current supply module and high-pressure electrostatic generation module all are arranged in the portable vacuum pan, and described vacuum chamber is arranged on the bottom of portable vacuum pan.
3. split type vacuum static electricity vestige extraction apparatus according to claim 2 is characterized in that having a plurality of micropores on the lower surface of described vacuum chamber, has aspirating hole on the described portable vacuum pan, and described aspirating hole links to each other with vacuum pump by exhaust tube.
4. split type vacuum static electricity vestige extraction apparatus according to claim 3, it is characterized in that, also comprise sealing ring, described sealing ring and sponge are arranged at the lower surface of vacuum chamber, described sponge is arranged in the sealing ring, and the below of described vacuum chamber is provided with the Electrostatic Absorption film, and described sponge is provided with electrode, described electrode links to each other with high-pressure electrostatic generation module, is used for the high direct voltage static that high-pressure electrostatic generation module produces is applied to the Electrostatic Absorption film.
5. split type vacuum static electricity vestige extraction apparatus according to claim 1, it is characterized in that, also comprise control module and powder spraying structure, be electrically connected between described supply module and the control module, described control module is electrically connected respectively with between high-pressure electrostatic generation module, Vacuuming structure and the powder spraying structure; Described powder spraying structure comprises the static powder box and the box that dusts, and described static powder box is used for holding electrostatic powder, and an end links to each other with control module, and the other end links to each other with the box that dusts, and has the mouth of dusting on the described box that dusts.
6. split type vacuum static electricity vestige extraction apparatus according to claim 5 is characterized in that, also comprise a casing, described supply module, control module and vacuum pump are arranged in the casing, and described vacuum pump is by being flexibly connected between jig and the casing; Described vacuum chamber is arranged on the casing, has a plurality of micropores on the upper surface of described vacuum chamber, has aspirating hole on the described vacuum chamber, and described aspirating hole links to each other with vacuum pump by exhaust tube; Described vacuum chamber is provided with on the plastic sheeting, and the described box that dusts covers on the plastic sheeting; The both sides of described casing top respectively are provided with a track, described track is provided with reciprocating corona electrode, described high-pressure electrostatic generation module links to each other with corona electrode, and described corona electrode is used for the high direct voltage static that high-pressure electrostatic generation module produces is applied to plastic sheeting by reciprocating motion.
7. split type vacuum static electricity vestige extraction apparatus according to claim 6 is characterized in that, described supply module is direct current supply module or Alternating Current Power Supply module.
8. the using method of a split type vacuum static electricity vestige extraction apparatus is characterized in that, described using method comprises: at first, vacuum pump is linked to each other with portable vacuum pan, again the Electrostatic Absorption film is placed on the surface of holding the trace object; Then, the portable vacuum pan that will have vacuum chamber covers on the Electrostatic Absorption film, with the hands brings pressure to bear on the portable vacuum pan again; Then, open vacuum pump, use vacuum pump that the air in the vacuum chamber is extracted out, when the Electrostatic Absorption film with hold between the trace object and to form the air negative pressure district, and when portable vacuum pan being adhere well to hold on the trace object, high-pressure electrostatic generation module is started working, and the high direct voltage static that produces is applied on the Electrostatic Absorption film by electrode, makes the dust traces of holding on the trace object to the Electrostatic Absorption film; At last, close vacuum pump, high-pressure electrostatic generation module quits work, and removes portable vacuum pan, start the Electrostatic Absorption film and be used for extracting the vestige that holds on the trace object.
9. the using method of a split type vacuum static electricity vestige extraction apparatus, it is characterized in that, described using method comprises: at first, vacuum pump is connected in the casing, simultaneously vacuum chamber is placed on the casing, the soft object that will have again the dust footprint is placed on the vacuum chamber, and plastic sheeting is placed on the soft object with dust footprint; Then, open vacuum pump, use vacuum pump that the air in the vacuum chamber is extracted out, thereby vacuum chamber and have between the soft object of dust footprint and have the soft object of dust footprint and plastic sheeting between form the air negative pressure district, make plastic sheeting, have the soft object of dust footprint and the upper surface adsorbed close of vacuum chamber is in the same place; At last, high-pressure electrostatic generation module is started working, the high direct voltage static that produces is applied on the plastic sheeting by reciprocating corona electrode, closes vacuum pump, high-pressure electrostatic generation module quits work, open and take off plastic sheeting and be used for extracting dust footprint on the soft object.
10. the using method of a split type vacuum static electricity vestige extraction apparatus, it is characterized in that, described using method comprises: at first, vacuum pump is connected in the casing, simultaneously vacuum chamber is placed on the casing, to leave the paper of writing impression or impression of the hand again and be placed on the vacuum chamber, plastic sheeting is placed on and leaves on the paper of writing impression or impression of the hand; Then, open vacuum pump, use vacuum pump that the air in the vacuum chamber is extracted out, thereby at vacuum chamber and leave between the paper of writing impression or impression of the hand and leave the paper of writing impression or impression of the hand and plastic sheeting between form the air negative pressure district, make plastic sheeting, leave the paper of writing impression or impression of the hand and the upper surface adsorbed close of vacuum chamber is in the same place; Then, high-pressure electrostatic generation module is started working, and the high direct voltage static that produces is applied on the plastic sheeting by reciprocating corona electrode, closes vacuum pump, high-pressure electrostatic generation module quits work; Then, the box that will dust is located at and is provided with plastic sheeting and leaves on the vacuum chamber table top of the paper of writing impression or impression of the hand, open the switch that dusts, the air of extracting out from vacuum chamber enters the static powder box, blow the static powder it is ejected on the plastic sheeting from the mouth that dusts on the box that dusts, the showing trace on plastic sheeting is out turned off the switch that dusts afterwards; At last, open the box that dusts, open and take off plastic sheeting and be used for to extract and to write impression or impression of the hand on the paper.
CN201210346354.2A 2012-09-19 2012-09-19 A kind of Split type vacuum electrostatic imprint extraction device and using method Expired - Fee Related CN102846322B (en)

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Cited By (3)

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Publication number Priority date Publication date Assignee Title
CN105534529A (en) * 2016-02-23 2016-05-04 北京布兰特警用装备有限责任公司 Electrostatic membrane for extracting dust footprint and manufacturing method of electrostatic membrane
CN106913343A (en) * 2017-03-24 2017-07-04 刘力 A kind of tridimensional footprint extraction element
CN112977897A (en) * 2021-03-25 2021-06-18 中国人民解放军63919部队 Equipment for loading charges to simulated lunar dust based on electrostatic corona technology

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