CN105832344B - The automatic powder supply trace inspection equipment and its powder supply method to take the fingerprint for scene of a crime powder method - Google Patents
The automatic powder supply trace inspection equipment and its powder supply method to take the fingerprint for scene of a crime powder method Download PDFInfo
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- CN105832344B CN105832344B CN201510020424.9A CN201510020424A CN105832344B CN 105832344 B CN105832344 B CN 105832344B CN 201510020424 A CN201510020424 A CN 201510020424A CN 105832344 B CN105832344 B CN 105832344B
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Abstract
The present invention relates to the trace detection tools in police criminal detection field, specifically a kind of automatic powder supply trace inspection equipment to take the fingerprint for scene of a crime powder method and its powder supply method, front/rear cover and pedestal are separately mounted on holder, air pump and powder bottle are respectively contained in the inner space that rear cover is formed with holder, pedestal and holder, and it is separately mounted on holder, spray canister is placed in protecgulum, and one end is hinged with holder, and the other end installs villous brush；Fluid bed is located at the lower section of filled pulvis powder bottle Nei, and the lower end of powder bottle is connected with air pump, and upper end is connected by airflow duct with spray canister；The body of calming the anger of air pump offer carries out " boiling " processing through fluid bed to pulvis, mixed gas with pulvis is ejected into trace by spray canister and examines on working face, the pulvis of flowing, which touches trace and is adsorbed in evidence surface, forms sharp image, villus brush plays the effect for preventing dust lost, also has the effect of redevelopment simultaneously, the image after hairbrush brushing is more clear, stablizes.
Description
Technical field
The present invention relates to the trace detection tools in police criminal detection field, specifically a kind of to be used for scene of a crime powder
The automatic powder supply trace inspection equipment and its powder supply method that method takes the fingerprint.
Background technology
The most popular method for being presently used for scene of a crime fingerprint imaging and analysis is called powder visualization (-isa-).This in film or
Can often it see in TV, investigator paints fine powder on fingerprint, then sticks shape and trace that adhesive tape obtains powder
Mark (the actually namely trace of fingerprint)；In this way, investigator can preserve finger print information to adhesive tape, to conveniently take back
It is analysed in depth in laboratory.If fingerprint stays in the surface of the unwetted property article such as metal, plastic cement, glass, ceramic tile, powder can be used
Last method takes the fingerprint, and dips in a little powder with banister brush, gently plays brush handle, powder is made equably to be scattered on fingerprint；Then it shakes off
Or excessive powder is flicked with brush point, colourless fingerprint can become coloured.Common powder has aluminium powder, iron powder, copper powder, graphite
Powder etc..It is a kind of easy, effective method that powder method, which takes the fingerprint, still, since used powder is mostly superfines,
After largely brushing, powder largely suspends in air, very big to the physical impairment of professional technician；Moreover, with brush
Son directly brushes fingerprint surface, is easy fingerprint damage.
Invention content
In order to solve the problems, such as harmful dust diffuse pollute environment in air, injury is handled a case policeman's body, of the invention
It is designed to provide a kind of automatic powder supply trace inspection equipment to take the fingerprint for scene of a crime powder method and its powder supply method.
The purpose of the present invention is achieved through the following technical solutions：
The automatic powder supply trace inspection equipment of the present invention includes pedestal, protecgulum, rear cover, holder, spray canister, air pump, built-in fluid bed
Powder bottle and power panel, wherein protecgulum, rear cover and pedestal be separately mounted on the holder, and the air pump and powder bottle house respectively
In the inner space that rear cover and holder, pedestal and holder are formed, and it is separately mounted on the holder；The spray canister is not working
State is placed in protecgulum, and one end is hinged with the holder, and the other end installs villous brush；The fluid bed is located at institute in powder bottle
The lower section of pulvis is filled, the lower end of the powder bottle is connected with the air pump, and upper end is connected by airflow duct with the spray canister；Institute
It is covered after stating equipped with operation button, the operation button and air pump are electrically connected with the power panel in pedestal respectively, the electricity
Source plate is electrically connected with the power module of pedestal setting and switch respectively, is that the operation button and air pump are powered.
Wherein：The top of the powder bottle is equipped with gland, which can up or down install on the bracket, the pressure
It covers and is respectively equipped with connecting tube and convex block, one end of the airflow duct is connected by the connecting tube with the upper end of powder bottle, separately
One end is connected with the spray canister；It is arranged with compression spring on the convex block, the both ends of the compression spring are connected to gland and holder respectively；Institute
It is telescopic tube-in-tube structure to state spray canister, i.e., inner cylinder is tightly connected with the airflow duct, can be opposite between outer barrel and the inner cylinder
Flexible, the villus brush is mounted on outer barrel spout end；Top in the rear cover is equipped with headlamp, the headlamp and the electricity
Source plate is electrically connected；The power module is charging panel, which is mounted in the pedestal, is filled with what is be arranged on the pedestal
Electrical outlet is electrically connected, and is electrically connected with the power panel；
The powder supply method of the present invention automatic powder supply trace inspection equipment is：
The power module is powered by power panel for air pump, and the air pump is made to be provided with pressure air, described to have pressure air warp
The fluid bed forms air-flow, acts on the pulvis in the powder bottle so that the pulvis is mixed with air, is formed with pulvis
Mixed gas should be sent to by the airflow duct in spray canister with the mixed gas of pulvis；The band sprayed by the spray canister
Have in the mixed gas of pulvis, a part of pulvis directly hits trace inspection working face and is adsorbed in trace inspection working face, another part
Pulvis circles round under the action of air-flow at the spray chamber mouth of the spray canister, and converges again with the pulvis sprayed at the spray chamber mouth
It hits trace and examines working face, hit repeatedly；During the mixed gas with pulvis sprays, the villus brush is adsorbed with powder
Agent；The extra mixed gas with pulvis is controlled by villus brush at the spray chamber mouth in the spray canister；
After injection, working face is examined using the inswept trace of the villus brush, pulvis is made to be attached on trace inspection working face；
During the inswept trace inspection working face of villus brush, the pulvis on the villus brushing hair plays the role of redevelopment, for
There is no the part of development to be supplemented on the inspection working face of trace described in course of injection, keeps trace inspection working face complete.
Advantages of the present invention is with good effect：
1. the automatic powder supply trace inspection equipment of the present invention forms air-flow by the body of calming the anger that air pump provides through fluid bed, make powder
Agent and there is pressure gas mixing " boiling ", pulvis is sent automatically and carries out trace inspection to trace inspection working face and samples, under the protection of villus brush
It prevents harmful pulvis to scatter and disappear and diffuses the body for injuring policeman in air；Villus brush may also function as while blocking filtering pulvis
Redevelopment, fixing effect, so that the trace of acquisition is more clear, improve sampling operation efficiency, saved pulvis.
2. being provided with gland above the air pump of automatic powder supply trace inspection equipment of the invention, powder bottle can be limited, and facilitate powder bottle
It picks and places.
3. the method for the present invention is easy to operate, powder supply is efficient, and pulvis hits trace inspection working face, loss less repeatedly, through suede
The trace inspection working face that hairbrush is inswept is more clear, stablizes.
Description of the drawings
Fig. 1 is the structural schematic diagram that trace of the present invention examines equipment folded state；
Fig. 2 is that trace of the present invention inspection equipment takes away the usage state diagram after protecgulum；
Fig. 3 is the internal structure schematic diagram that trace of the present invention examines equipment；
Fig. 4 is the explosive view that trace of the present invention examines equipment；
Fig. 5 is the fundamental diagram that trace of the present invention examines equipment；
Fig. 6 is A-A sectional views in Fig. 4；
Fig. 7 is B-B sectional views in Fig. 4；
Fig. 8 is the structural schematic diagram that trace of the present invention examines plant bottom case bottom；
Wherein：1 is pedestal, and 2 be protecgulum, and 3 be rear cover, and 4 be holder, and 5 be spray canister, and 6 be villus brush, and 7 be air pump, and 8 be powder
Bottle, 9 be fluid bed, and 10 be airflow duct, and 11 be gland, and 12 be compression spring, and 13 be headlamp, and 14 be operation button, and 15 be connection
Pipe, 16 be convex block, and 17 be power panel, and 18 be charging panel, and 19 be switch, and 20 be charging socket.
Specific implementation mode
The invention will be further described below in conjunction with the accompanying drawings.
As shown in Fig. 1~8, it includes pedestal 1, protecgulum 2, rear cover 3, holder 4, spray canister that automatic powder supply trace of the invention, which examines equipment,
5, villus brush 6, air pump 7, the powder bottle 8 of built-in fluid bed 9, gland 11, power panel 17 and power module, the wherein lower end of holder 4
On pedestal 1, protecgulum 2 is located at the both sides of holder 4 with rear cover 3, and rear cover 3 is mounted on holder 4, and protecgulum 2 is detachable
Ground is mounted on holder 4；The horizontal cross-section of protecgulum 2 and rear cover 3 is " u "-shaped, and internal there are accommodating spaces, and in " u "-shaped
Open end both sides inner wall is from top to bottom arranged with multiple protrusions, to make itself to be fixed with holder 4.
Powder bottle 8 is placed in the inner space that rear cover 3 is formed with holder 4, and air pump 7 is vacant in pedestal 1 and holder 4 are formed
Portion space, and be separately fixed on holder 4；Air pump 7 is located at the lower section of powder bottle 8, and is connected with the lower end of powder bottle 8.Fluid bed 9
Positioned at the lower section of filled pulvis in powder bottle 8.The top of powder bottle 8 is equipped with gland 11, which can be mounted on branch up or down
The upper end of frame 4；It is respectively equipped with connecting tube 15 and convex block 16 on gland 11, compression spring 12 is arranged on convex block 16, the two of the compression spring 12
End is connected to gland 11 and holder 4 respectively, by the effect of compression spring 12, can be limited to powder bottle 8 by gland 11, and replacing
When powder bottle 8, only gland 11 need to be pushed up, you can take out powder bottle 8, after replacing with new powder bottle 8, work of the gland 11 in compression spring 12
With lower reset.Spray canister 5 is placed in non-working condition in protecgulum 2, and one end is hinged with holder 4, and the other end installs villous brush 6.
The upper end of powder bottle 8 is connected with one end of connecting tube 15, and the other end of connecting tube 15 is connected by airflow duct 10 with spray canister 5
It is logical.
Power panel 17, the power panel 17 and the power module for being located at 7 other side of air pump are equipped in the pedestal 1 of 7 side of air pump
Electrical connection.The mode of dry cell or rechargeable battery can be used in power module, and the power module of the present embodiment is in pedestal 1
Charging panel 18.Switch 19 and charging socket 20 are respectively equipped on the bottom surface of pedestal 1, charging panel 18 is electrically connected with charging socket 20
It connects, and is electrically connected with power panel 17, power panel 17 is electrically connected with switch 19.Rear cover 3 is equipped with operation button 14, the operation button
14 are electrically connected with power panel 17.Top in rear cover 3 is equipped with headlamp 13, which is electrically connected with power panel 17.
Spray canister 5 is telescopic tube-in-tube structure, i.e., inner cylinder is tightly connected with airflow duct 10, can between outer barrel and the inner cylinder
Relative telescopic, villus brush 6 are mounted on outer barrel spout end.
The powder supply method for the automatic powder supply trace inspection equipment that the present invention takes the fingerprint for scene of a crime powder method is：
It is charged to charging panel 18 using charging socket 20, which powers for power panel 17.Starting switch 19, is pressed
Operation button 14, power panel 17 are powered for air pump 7, and booster air pump (band speed-regulating function) 7 makes the air pump 7 be provided with pressure air, will
Body of calming the anger is provided with after air compression to use for powder bottle 8.What air pump 7 provided calms the anger body through the formation air-flow of fluid bed 9, acts on
Pulvis bottom makes pulvis float, is mixed with air, is in " boiling " state, forms the mixed gas with pulvis.With pulvis
Mixed gas is sent to by airflow duct 10 in spray canister 5, is sprayed by spray canister 5；The mixed gas with pulvis sprayed, air
It is discharged in air, a part of pulvis directly hits trace inspection working face and is adsorbed in trace inspection working face, and another part pulvis is in air-flow
Under the action of convolution at the spray chamber mouth of spray canister 5, and at spray chamber mouth spray pulvis converge again hit trace examine working face, such as
This hits repeatedly；At the same time when some pulvis passes through the villus brush 6 of development, fixing, filtering with air, by villus
6 absorption of brush, air is then after the filtering of villus brush 6 in row to air.
While villus brush 6 blocks, filters pulvis, the effect of redevelopment can be played.When pulvis injection strikes trace inspection
Working face, and the trace inspection pulvis being attached on trace inspection working face is in irregular status since pulvis is micro floc matter, it is right
The reflection of light is in scattering state, observes unobvious, pulvis can be made regularly to be attached to using the light sweeping work of villus brush 6
Trace examines working face, improves light reflection efficiency, reduces scattering light, the trace of acquisition is made to be more clear.It is attached to 6 villus of villus brush
On pulvis during light sweep, redevelopment can be played the role of, for there is no the part of development to carry out in course of injection
Supplement so that it is more perfect that trace examines achievement.The effect that villus brush 6 also acts as simultaneously is to control part pulvis in spray canister 5
Spray chamber mouth inside avoid excessive, so that extra pulvis is controlled at spray chamber mouth, avoid pollution environment, damage policeman's body.
The flow of air pump 7 of the present invention is 60~120cm3/ s, gas outlet maximum working pressure (MWP) are no more than 0.05Mpa, can root
The bulk density that pulvis is examined according to trace adjusts uninterrupted.It is 0.3~1.0g/cm that trace, which examines pulvis bulk density,3, granularity 500~
Between 800 mesh.The aperture of fluid bed is 5~10 μm, a diameter of 15mm, thickness 2mm.
Experimental example
After pressing fingerprint on glass, it is the special silver powder of the criminal investigation of 800 mesh as work powder to use mesh number.Work
When, protecgulum 2 is unloaded, spray canister 5 is rotated, buckles protecgulum 2 again, holds automatic powder supply trace inspection equipment, spray canister 5 is made to be directed at trace inspection work
Face；Thumb presses switch 19, and 7 speed of air pump is adjusted to 100cm3/ s presses the operation button 14 driving air pumps 7, compressed air
Air-flow is formed through fluid bed 9, acts on development pulvis so that pulvis mixes " boiling " with air, forms the mixing with pulvis
Gas；Mixed gas enters through airflow duct 10 in spray canister 5, is sprayed onto on glass, using the performance of development pulvis, makes glass
The trace left on cup clearly displays；After villus brush 6 is gently swept, trace is more clear and stablizes, unemployed mixed
The pulvis closed in air is adsorbed under the filtering of villus brush 6 on villus, and air then filters heel row to environment sky by villus
In gas, the clear fingerprint of previous press can be seen on glass surface.In the process, headlamp 13 can also illuminate trace inspection working face.
After use, protecgulum 2 is opened, spray canister 5 is folded and is resetted, protecgulum 2 is covered.
Claims (7)
1. a kind of automatic powder supply trace inspection equipment to take the fingerprint for scene of a crime powder method, it is characterised in that：Including pedestal
(1), the powder bottle (8) and power panel of protecgulum (2), rear cover (3), holder (4), spray canister (5), air pump (7), built-in fluid bed (9)
(17), wherein protecgulum (2), rear cover (3) and pedestal (1) are separately mounted on the holder (4), the air pump (7) and powder bottle (8)
It is respectively contained in the inner space that rear cover (3) is formed with holder (4), pedestal (1) with holder (4), and is separately mounted to the branch
On frame (4)；The spray canister (5) is placed in non-working condition in protecgulum (2), and one end is hinged with the holder (4), other end peace
Equipped with villus brush (6)；The fluid bed (9) is located at the lower section of filled pulvis powder bottle (8) Nei, the lower end of the powder bottle (8) with it is described
Air pump (7) is connected, and upper end is connected by airflow duct (10) with the spray canister (5)；The rear cover (3) is equipped with operation and presses
Button (14), the operation button (14) and air pump (7) are electrically connected with the power panel (17) in pedestal (1) respectively, the electricity
Source plate (17) is electrically connected with the power module of pedestal (1) setting and switch (19) respectively, is the operation button (14) and air pump
(7) it powers.
2. examining equipment by the automatic powder supply trace that scene of a crime powder method takes the fingerprint is used for described in claim 1, it is characterised in that：
The top of the powder bottle (8) is equipped with gland (11), which can be mounted on the holder (4) up or down, described
Connecting tube (15) and convex block (16) are respectively equipped on gland (11), one end of the airflow duct (10) passes through the connecting tube (15)
It is connected with the upper end of powder bottle (8), the other end is connected with the spray canister (5)；It is arranged with compression spring (12) on the convex block (16),
The both ends of the compression spring (12) are connected to gland (11) and holder (4) respectively.
3. examining equipment by the automatic powder supply trace that scene of a crime powder method takes the fingerprint is used for described in claims 1 or 2, feature exists
In：The spray canister (5) is telescopic tube-in-tube structure, i.e., inner cylinder is tightly connected with the airflow duct (10), and outer barrel is interior with this
Cylinder between can relative telescopic, the villus brush (6) be mounted on outer barrel spout end.
4. examining equipment by the automatic powder supply trace that scene of a crime powder method takes the fingerprint is used for described in claims 1 or 2, feature exists
In：Top in the rear cover (3) is equipped with headlamp (13), which is electrically connected with the power panel (17).
5. examining equipment by the automatic powder supply trace that scene of a crime powder method takes the fingerprint is used for described in claims 1 or 2, feature exists
In：The power module is charging panel (18), which is mounted in the pedestal (1), is set on the pedestal (1)
Charging socket (20) electrical connection set, and be electrically connected with the power panel (17).
6. a kind of by the confession for being used for the automatic powder supply trace inspection equipment that scene of a crime powder method takes the fingerprint described in claims 1 or 2
Powder method, it is characterised in that：The power module is powered by power panel (17) for air pump (7), and the air pump (7) is made to be provided with pressure
Air, it is described to there is pressure air to form air-flow through the fluid bed (9), act on the pulvis in the powder bottle (8) so that the pulvis
It is mixed with air, forms the mixed gas with pulvis, the airflow duct (10) quilt should be passed through with the mixed gas of pulvis
It send to spray canister (5)；In the mixed gas with pulvis sprayed by the spray canister (5), a part of pulvis directly hits trace inspection
Working face and it is adsorbed in trace inspection working face, another part pulvis circles round under the action of air-flow in the spray chamber of the spray canister (5)
At mouthful, and converge with the pulvis sprayed at the spray chamber mouth and hit trace inspection working face again, hits repeatedly；Mixed with pulvis
During closing gas ejection, the villus brush (6) is adsorbed with pulvis；The extra mixing with pulvis in the spray canister (5)
Gas is controlled by villus brush (6) at the spray chamber mouth.
7. powder supply method as described in claim 6, it is characterised in that：After injection, the inswept trace of villus brush (6) is utilized
Working face is examined, pulvis is made to be attached on trace inspection working face；It, should during the inswept trace of the villus brush (6) examines working face
Pulvis on villus brush (6) villus plays the role of redevelopment, for no aobvious on the inspection working face of trace described in course of injection
The part of shadow is supplemented, and keeps trace inspection working face complete.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510020424.9A CN105832344B (en) | 2015-01-15 | 2015-01-15 | The automatic powder supply trace inspection equipment and its powder supply method to take the fingerprint for scene of a crime powder method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510020424.9A CN105832344B (en) | 2015-01-15 | 2015-01-15 | The automatic powder supply trace inspection equipment and its powder supply method to take the fingerprint for scene of a crime powder method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105832344A CN105832344A (en) | 2016-08-10 |
| CN105832344B true CN105832344B (en) | 2018-08-21 |
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ID=56580056
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510020424.9A Active CN105832344B (en) | 2015-01-15 | 2015-01-15 | The automatic powder supply trace inspection equipment and its powder supply method to take the fingerprint for scene of a crime powder method |
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| Country | Link |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109419513B (en) * | 2017-08-28 | 2020-12-08 | 大连圣迈新材料有限公司 | Automatic powder supply trace detection equipment for extracting fingerprints by powder method on crime scene and powder supply method thereof |
| CN108954923B (en) * | 2018-09-30 | 2020-07-10 | 上海交通大学 | Accurate powder supply device for accelerated dust deposition test of air conditioner heat exchanger |
| CN111228103A (en) * | 2020-01-14 | 2020-06-05 | 上海理工大学 | Hand skin care instrument based on fluidized bed principle |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4248543A (en) * | 1979-02-14 | 1981-02-03 | Sirchie Finger Print Laboratories, Inc. | Finger print powder dispensing apparatus |
| CN200941894Y (en) * | 2006-08-22 | 2007-09-05 | 李保供 | Electric fingerprint brush |
| CN203861232U (en) * | 2014-03-27 | 2014-10-08 | 李承承 | Special magnetic powder brush for extraction of fingerprints |
| CN104107050A (en) * | 2014-07-31 | 2014-10-22 | 张琦 | Fingerprint powder automatic rotating brush displaying device |
| CN204468090U (en) * | 2015-01-15 | 2015-07-15 | 大连圣迈新材料有限公司 | The automatic powder trace that supplies taken the fingerprint for scene of a crime powder method examines equipment |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8360078B2 (en) * | 2010-06-25 | 2013-01-29 | Hct Asia Ltd | Compact system with magnetic slide out brush |
-
2015
- 2015-01-15 CN CN201510020424.9A patent/CN105832344B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4248543A (en) * | 1979-02-14 | 1981-02-03 | Sirchie Finger Print Laboratories, Inc. | Finger print powder dispensing apparatus |
| CN200941894Y (en) * | 2006-08-22 | 2007-09-05 | 李保供 | Electric fingerprint brush |
| CN203861232U (en) * | 2014-03-27 | 2014-10-08 | 李承承 | Special magnetic powder brush for extraction of fingerprints |
| CN104107050A (en) * | 2014-07-31 | 2014-10-22 | 张琦 | Fingerprint powder automatic rotating brush displaying device |
| CN204468090U (en) * | 2015-01-15 | 2015-07-15 | 大连圣迈新材料有限公司 | The automatic powder trace that supplies taken the fingerprint for scene of a crime powder method examines equipment |
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