CN103932712A - Low-temperature atomization trace showing instrument and working method of low-temperature atomization trace showing instrument - Google Patents
Low-temperature atomization trace showing instrument and working method of low-temperature atomization trace showing instrument Download PDFInfo
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- CN103932712A CN103932712A CN201410139082.8A CN201410139082A CN103932712A CN 103932712 A CN103932712 A CN 103932712A CN 201410139082 A CN201410139082 A CN 201410139082A CN 103932712 A CN103932712 A CN 103932712A
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Abstract
The invention discloses a low-temperature atomization trace showing instrument which is characterized by comprising a box, a control unit, a temperature-humidity sensor, a refrigerating unit, a humidification unit and a power supply module. The temperature-humidity sensor, the refrigerating unit and the humidification unit are arranged in the box, the control unit is respectively connected with the temperature-humidity sensor, the refrigerating unit and the humidification unit, and the power supply module is connected with the control unit, the temperature-humidity sensor, the refrigerating unit and the humidification unit. A working method includes the steps that the refrigerating unit and the humidification unit are controlled by the control unit to carry out refrigerating and humidification, the temperature and the humidity in the box are transmitted to the control unit through the temperature-humidity sensor to enable the interior environment of the box to be a constant-temperature and constant-humidity environment, thin even water mist is formed on the surface of an evidence object placed in the box, and a trace is shown. The low-temperature atomization trace showing instrument and the working method have the advantages that evidence obtaining deviation or evidence object damage and the like caused by improper manual operation in a traditional complex powder collecting mode is avoided, repeated collecting can be carried out on the evidence object, and secondary evidence obtaining is facilitated.
Description
(1) technical field:
The present invention relates to a kind of apparatus for obtaining evidence, especially a kind of low-temperature atomizing showing trace instrument and method of work thereof.
(2) background technology:
At present, solve the vestige (containing impression of the hand, footprint, cheilogramma seals, skin escutcheon etc.) of staying smooth object surface in Forensic Science find to extract difficulty, seriously polluted in extracting, the DNA extraction inspection in later stage is affected to the problems such as larger.
Impression of the hand is first of evidence, and the discovery of impression of the hand is the primary link that obtains evidence of crime with extracting, and is the important content that criminal-scene is reconnoitred.But the discovery of impression of the hand, extraction, utilization, exist and find to extract difficulty, and means are single, be suitable for Object range narrow, environmental pollution is serious, large to technical staff, the proprietary health of article and environmental injury, and the impression of the hand extracting can not carry out the problems such as other comprehensive utilization again.
Along with the raising of expanding economy and people's living standard, leaving over the object of the vestiges such as impression of the hand is also on the increase, the vestiges such as the impression of the hand on some objects, with traditional method discovery and extraction, can not satisfy the demand, as objects such as some metal door and windows, implements, sub-gloss varnish furniture, plastics, often leave over lower potential sweat fingerprint, because above object is stronger to reflection of light effect, be generally water white transparency and leave over superincumbent sweat fingerprint, also show as reflection of light with objects such as metals, can not form so effective contrast, be difficult for being found.Even if be found, all undesirable with extraction effects such as traditional powder methods, and as easy as rolling off a logly cause manifesting failure and cannot retrieve.
By research experiment, change absorption and the reflection characteristic of potential sweat fingerprint to light on smooth object, make it to form compared with high contrast, and the lasting regular hour, take impression of the hand for darkroom and create conditions, improve vestige contrast, find out and find and the better method extracting.
In recent years, the inspection technology of DNA and DNA database retrieval are all being brought into play larger effect.The impression of the hand that we can leave over scene carries out DNA inspection, often occurs the situation that impression of the hand and DNA can not get both between the two, is difficult to reach the multiple utilization of a kind of vestige.General is all to utilize just to carry out DNA inspection without the incompleteness of test condition, fuzzy fingerprint, this is main because use most methods, comprise that use " ultraviolet visualization photographic system " takes the fingerprint, and all checks generation pollution, interference and destruction in various degree to the DNA in later stage.
Nowadays in to the field of fingerprint evidence obtaining, the extraction of fingerprint pattern is taked to following method substantially: (1) observational method of breathing out: the observation if just breathe out in smooth thing surface; (2) observation method of naked eye: observe by certain light, angle; (3) magnifier observational method: observe under certain light, angle by magnifier; (4) ultraviolet observational method: observe by ultraviolet feature; (5) physics, chemical observational method: for being with the naked eye difficult to observe the potential impression of the hand pattern of finding, need, by physics, chemical treatment, find to find.
The common physical method surface of the non-absorbent articles such as metal, plastic cement, glass, ceramic tile (be applicable to fingerprint be retained in):
(1) powder method, selects the large powder of color contrast, is sprinkling upon and extracts complete fingerprint;
(2) magnetic particle method, with fine ferrous powder granules, with Magnet, as brush, sweeping back and forth, manifests fingerprint.
Common chemical method (being applicable to the surface of the absorbent articles such as paper, card, leather, wood):
(1) iodine fumigation---use the iodine crystal generation steam of heating, it just there will be the fingerprint of yellowish-brown with after the oils and fats of fingerprint residues thing produces and reacts, and must take pictures immediately or fix by chemical method;
(2) Ninghai obtains woods (Ninhydrin) method---and reagent is sprayed on a corpse or other object for laboratory examination and chemical testing, after reacting with the aminoacid generation of body exudates, can presents the fingerprint of purple;
(3), after silver nitrate method---silver nitrate solution reacts with the ammonification sodium generation of hiding in fingerprint, can produce in the sun the fingerprint of black;
(4) fluorescent reagent method---fluorescent ammonia and phthalic aldehyde almost at once with protein or the aminoacid effect of fingerprint residues thing, produce high fluorescent fingerprint, this reagent can be used in the surface of colorful article.Can use in addition three seconds glue methods to gather fingerprint, the gas that utilizes cyanoacrylate reacts with water and amino acid molecular and produces fingerprint.
Hence one can see that, aspect fingerprint extraction, retains surperficial unlike material according to fingerprint, can adopt different extracting method.The extracting method of this complexity often can be because artificially judgement or operate miss cause the damage of irreparability to exhibit.Extracting method mostly is disposable evidence obtaining, if evidence obtaining personnel lack experience or error in judgement, causes and extracts unsuccessfully, and fingerprint material evidence damages, and so very likely loses important clue and strong material evidence, causes huge obstruction to solving a case.And taking physics extraction method as example, due to evidence obtaining personnel misoperation, the situation of destroying fingerprint when sweeping powder is of common occurrence.
In addition, the method that tradition manifests the vestiges such as impression of the hand is used powder and chemical reagent to manifest mostly, pollute excessive, to carried trace object, environment and technician healthy all produce larger infringement, object holder is more and more higher to the requirement of Public Security Organs simultaneously, so, be badly in need of exploring a kind of convenient, efficient, harmless, nontoxic, harmless method of inspection.
(3) summary of the invention:
The object of the present invention is to provide a kind of low-temperature atomizing showing trace instrument and method of work thereof, it can solve the deficiencies in the prior art, possess the showing traces such as fingerprint fast complete, leaching process do not damage exhibit, can repeatedly collect evidence, feature safe and reliable, easy and simple to handle.
Technical scheme of the present invention: a kind of low-temperature atomizing showing trace instrument, is characterized in that it comprises casing, control unit, Temperature Humidity Sensor, refrigeration unit, humidifying unit and supply module; Described Temperature Humidity Sensor, refrigeration unit and humidifying unit are arranged in casing; Described control unit is connected with Temperature Humidity Sensor, refrigeration unit and humidifying unit respectively; Described supply module connection control unit, Temperature Humidity Sensor, refrigeration unit and humidifying unit.
Described refrigeration unit comprises refrigerating plant and heat abstractor; Described refrigerating plant and heat abstractor are arranged on the overall structure that forms a sealing on constant temperature inner bag; Described Temperature Humidity Sensor and humidifying unit are installed on inner bag; Described inner bag is embedded in casing, and inner bag upper surface is useful on the fixing edge fixing with casing.
Described refrigerating plant adopts semiconductor chilling plate refrigeration, and it is cooling that described heat abstractor employing wind-cooling heat dissipating air channel mode is carried out quasiconductor hot junction; The air outlet in described air channel is arranged on casing.
Described casing top is transparency cover.
Described humidifying unit comprises damping device and agitating device; The equal connection control unit of described damping device and agitating device and supply module.
Described damping device adopts ultrasonic-wave water-atomization damping device.
In described inner bag, be provided with condensate water guide to the draining guiding device that carries out condensed water recovery in container.
The adjustable pallet of lifting that described inner bag mid portion is provided with placing articles.
On described inner bag, lighting unit is installed; Described lighting unit comprises fixed LED background light and adjustable spotlight; Described lighting unit is connected with control unit and supply module.
Outer cantilever or the support connecting for fixed camera of described casing.
Described control unit comprises control device and is installed on can provide the LCD of switching value control and analog acquisition lcd touch control panel on casing.
Described supply module is divided into constant-current source and two parts of Switching Power Supply, and described constant-current source is connected with refrigeration unit, and described Switching Power Supply is connected with lighting unit, humidifying unit and control unit.
A method of work for above-mentioned low-temperature atomizing showing trace instrument, is characterized in that it comprises the following steps:
(1) control unit control refrigeration unit and humidifying unit refrigeration humidification;
(2) humiture in casing is passed to control unit by Temperature Humidity Sensor, makes the environment for constant temperature and humidity in casing;
(3) the exhibit surface being placed in casing forms even water smoke as thin as a wafer, showing trace.
In described step (3), control unit control illuminator is adjusted illumination, angle, and vestige is high-visible.
The LCD lcd touch control panel of described control unit can be controlled calorstat temperature, humidity, stirring, lighting parameter, and the demonstration of temperature, humidity digital quantity is provided.
Described casing is outer to be connected on the cantilever of fixed camera or support, camera being installed, can mechanical adjustment camera position, can be in the optional position that rests on casing upper transparent lid, and make the downward level of camera lens in transparency cover and stablize motionless.
Operation principle of the present invention: the present invention utilizes atomization method by water purification atomization, " water smoke " is condensed on the object that leaves vestige (containing impression of the hand, footprint, cheilogramma seal, skin escutcheon etc.) with low temperature (5 DEG C-10 DEG C) refrigerating method, form optics contrast, coordinate light source and photographic equipment, find and extract fixing vestige (containing impression of the hand, footprint, cheilogramma seal, skin escutcheon etc.).
Superiority of the present invention: 1, the present invention avoids in the powder acquisition mode of tradition complexity, the situation such as evidence obtaining deviation or exhibit damage causing because manual operation is improper; 2, exhibit can gather repeatedly, is conducive to secondary evidence obtaining; 3, simple operation, only needs to use touch screen to set expection humiture, and adjusts article angle, light angle and illumination, can the clear fingerprint that manifests, and the evidence obtaining of being convenient to take pictures; 4, adopt semiconductor refrigerating, without leaking, when the present invention works peace and quiet shockproof, avoided the impact of mechanical shock on the evidence obtaining of taking pictures; 5, volume of the present invention is little, and reliability is high; 6, the process environmental protection that fingerprint manifestation gathers, does not produce pollution; 7, inner bag can separate with casing, and inner bag can be overall from the dismounting of casing upper surface; 8, the present invention manifests vestige (containing impression of the hand, footprint, cheilogramma seal, skin escutcheon etc.), belong to nondestructive testing, not only can repeat to manifest extraction to same piece of impression of the hand, can also carry out DNA inspection and carry out other trace material evidence inspections impression of the hand with good conditionsi, make impression of the hand can obtain comprehensively, utilize all sidedly, realize impression of the hand and DNA data base's dual test, inquiry, retrieval, the Police Information utilization of resources is arrived ultimate attainment; 9, the present invention does not use expensive chemistry, biological reagent, can manifest the impression of the hand of leaving over; Without harm, pollution-free to environment and object to the technical staff who operates, object holder health; Vestige (containing impression of the hand, footprint, cheilogramma seal, skin escutcheon etc.) after manifesting, as long as leave the skin exfoliation cell that is enough to carry out DNA typing detection, can carry out DNA extraction inspection again; 10, the present invention is widely used in the smooth objects such as sub-gloss varnish tool, metal plastic-steel door and window, porcelain jadeware, electronic product, gun; 11, success rate of the present invention is high, can repeat to manifest to the impression of the hand manifesting by the method; 12, the present invention is not subject to the impact of environmental factors and weather conditions, be applicable to various places Public Security Organss investigate on the spot at the scene with laboratory in apply.
(4) brief description of the drawings:
Fig. 1 is the structured flowchart of the related low-temperature atomizing showing trace of the present invention instrument.
Fig. 2 is the schematic perspective view of the related low-temperature atomizing showing trace of the present invention instrument.
Fig. 3 is the top view of the related low-temperature atomizing showing trace of the present invention instrument.
Fig. 4 is inner bag top view in the related low-temperature atomizing showing trace of the present invention instrument.
Fig. 5 is inner bag axonometric chart in the related low-temperature atomizing showing trace of the present invention instrument.
Wherein, 1 is casing, and 2 is inner bag, and 3 is transparency cover, and 4 is LCD lcd touch control panel, and 5 is air outlet, and 6 is Temperature Humidity Sensor, and 7 is fixed LED background light, and 8 is adjustable spotlight, and 9 is damping device, and 10 is agitating device, and 11 is draining guiding device.
(5) detailed description of the invention:
Embodiment: a kind of low-temperature atomizing showing trace instrument (seeing Fig. 1 to Fig. 5), is characterized in that it comprises casing 1, control unit, Temperature Humidity Sensor 6, refrigeration unit, humidifying unit and supply module; Described Temperature Humidity Sensor 6, refrigeration unit and humidifying unit are arranged in casing 1; Described control unit is connected with Temperature Humidity Sensor 6, refrigeration unit and humidifying unit respectively; Described supply module connection control unit, Temperature Humidity Sensor 6, refrigeration unit and humidifying unit.
Described refrigeration unit comprises refrigerating plant and heat abstractor; Described refrigerating plant and heat abstractor are arranged on the overall structure that forms a sealing on constant temperature inner bag 2; Described Temperature Humidity Sensor 6 and humidifying unit are installed on inner bag 2; Described inner bag 2 is embedded in casing 1, and inner bag 2 upper surfaces are useful on the fixing edge fixing with casing 1; Inner bag 2 is of a size of 380mm*400mm*300mm; It is 5mm aluminum alloy plate materials that described inner bag 2 adopts thickness, and inwall is Lycoperdon polymorphum Vitt plated film.(seeing Fig. 1 to Fig. 5)
Described refrigerating plant adopts semiconductor chilling plate refrigeration, and it is cooling that described heat abstractor employing wind-cooling heat dissipating air channel mode is carried out quasiconductor hot junction; The air outlet 5 in described air channel is arranged on rear side and the left side of casing 1.(seeing Fig. 1 to Fig. 5)
Described casing 1 top is transparency cover 3; Casing 1 outside is designed to cuboid metal plate structure, and overall dimensions is that the wide * of the long * of 800mm*600mm*600mm(is high); Transparency cover 3 is transparent double-layer glass cover; It is 1.2mm cold-rolled steel sheet that described casing 1 adopts thickness, and surface is the electrostatic spraying of computer color.(seeing Fig. 1 to Fig. 5)
Described humidifying unit comprises damping device 9 and agitating device 10; Described damping device 9 and the equal connection control unit of agitating device 10 and supply module.(seeing Fig. 1 to Fig. 5)
Described damping device 9 adopts ultrasonic-wave water-atomization damping device.
In described inner bag 2, be provided with condensate water guide to the draining guiding device 11 that carries out condensed water recovery in container.(seeing Fig. 1 to Fig. 5)
Described inner bag 2 mid portions are provided with the adjustable pallet of lifting of placing articles.
On described inner bag 2, lighting unit is installed; Described lighting unit comprises fixed LED background light 7 and adjustable spotlight 8; Described lighting unit is connected with control unit and supply module.(seeing Fig. 1 to Fig. 5)
The outer connection of described casing 1 is for cantilever or the support of fixed camera.
Described control unit comprises control device and is installed on can provide the LCD of switching value control and analog acquisition lcd touch control panel 4 on casing 1; Touch control screen 4 is arranged on plane right side on casing, can regulate setting to every numerical value by touch screen; Control device is placed in casing 1, outside inner bag 2.
Described supply module is divided into constant-current source and two parts of Switching Power Supply, and described constant-current source is connected with refrigeration unit, and described Switching Power Supply is connected with lighting unit, humidifying unit and control unit; Supply module is placed in casing 1, outside inner bag 2.
A method of work for above-mentioned low-temperature atomizing showing trace instrument, is characterized in that it comprises the following steps:
(1) control unit control refrigeration unit and humidifying unit refrigeration humidification;
(2) humiture in casing is passed to control unit by Temperature Humidity Sensor 6, makes the environment for constant temperature and humidity in casing;
(3) the exhibit surface being placed in casing forms even water smoke as thin as a wafer, showing trace.
In described step (3), control unit control illuminator is adjusted illumination, angle, and vestige is high-visible.
The LCD lcd touch control panel 4 of described control unit can be controlled calorstat temperature, humidity, stirring, lighting parameter, and the demonstration of temperature, humidity digital quantity is provided.
The outer connection of described casing 1 is on the cantilever of fixed camera or support, camera being installed, can mechanical adjustment camera position, can be in the optional position that rests on casing upper transparent lid 3, and make the downward level of camera lens in transparency cover 3 and stablize motionless.
Claims (10)
1. a low-temperature atomizing showing trace instrument, is characterized in that it comprises casing, control unit, Temperature Humidity Sensor, refrigeration unit, humidifying unit and supply module; Described Temperature Humidity Sensor, refrigeration unit and humidifying unit are arranged in casing; Described control unit is connected with Temperature Humidity Sensor, refrigeration unit and humidifying unit respectively; Described supply module connection control unit, Temperature Humidity Sensor, refrigeration unit and humidifying unit.
2. a kind of low-temperature atomizing showing trace instrument according to claim 1, is characterized in that described refrigeration unit comprises refrigerating plant and heat abstractor; Described refrigerating plant and heat abstractor are arranged on the overall structure that forms a sealing on constant temperature inner bag; Described Temperature Humidity Sensor and humidifying unit are installed on inner bag; Described inner bag is embedded in casing, and inner bag upper surface is useful on the fixing edge fixing with casing.
3. a kind of low-temperature atomizing showing trace instrument according to claim 2, is characterized in that described refrigerating plant adopts semiconductor chilling plate refrigeration, and it is cooling that described heat abstractor adopts wind-cooling heat dissipating air channel mode to carry out quasiconductor hot junction; The air outlet in described air channel is arranged on casing; Described casing top is transparency cover.
4. a kind of low-temperature atomizing showing trace instrument according to claim 1, is characterized in that described humidifying unit comprises damping device and agitating device; The equal connection control unit of described damping device and agitating device and supply module.
5. a kind of low-temperature atomizing showing trace instrument according to claim 2, is characterized in that being provided with in described inner bag by condensate water guide to the draining guiding device that carries out condensed water recovery in container; The adjustable pallet of lifting that described inner bag mid portion is provided with placing articles.
6. a kind of low-temperature atomizing showing trace instrument according to claim 2, is characterized in that, on described inner bag, lighting unit is installed; Described lighting unit comprises fixed LED background light and adjustable spotlight; Described lighting unit is connected with control unit and supply module.
7. a kind of low-temperature atomizing showing trace instrument according to claim 1, it is characterized in that described control unit comprises control device and is installed on can provide the LCD of switching value control and analog acquisition lcd touch control panel on casing.
8. a kind of low-temperature atomizing showing trace instrument according to claim 1, it is characterized in that described supply module is divided into constant-current source and two parts of Switching Power Supply, described constant-current source is connected with refrigeration unit, and described Switching Power Supply is connected with lighting unit, humidifying unit and control unit.
9. a method of work for low-temperature atomizing showing trace instrument described in claim 1, is characterized in that it comprises the following steps:
(1) control unit control refrigeration unit and humidifying unit refrigeration humidification;
(2) humiture in casing is passed to control unit by Temperature Humidity Sensor, makes the environment for constant temperature and humidity in casing;
(3) the exhibit surface being placed in casing forms even water smoke as thin as a wafer, showing trace.
10. a kind of method of work of low-temperature atomizing showing trace instrument according to claim 9, is characterized in that in described step (3), control unit control illuminator is adjusted illumination, angle, and vestige is high-visible;
The LCD lcd touch control panel of described control unit can be controlled calorstat temperature, humidity, stirring, lighting parameter, and the demonstration of temperature, humidity digital quantity is provided;
Described casing is outer to be connected on the cantilever of fixed camera or support, camera being installed, can mechanical adjustment camera position, can be in the optional position that rests on casing upper transparent lid, and make the downward level of camera lens in transparency cover and stablize motionless.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410139082.8A CN103932712A (en) | 2014-04-09 | 2014-04-09 | Low-temperature atomization trace showing instrument and working method of low-temperature atomization trace showing instrument |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410139082.8A CN103932712A (en) | 2014-04-09 | 2014-04-09 | Low-temperature atomization trace showing instrument and working method of low-temperature atomization trace showing instrument |
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| CN103932712A true CN103932712A (en) | 2014-07-23 |
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| CN201410139082.8A Pending CN103932712A (en) | 2014-04-09 | 2014-04-09 | Low-temperature atomization trace showing instrument and working method of low-temperature atomization trace showing instrument |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106175783A (en) * | 2016-09-26 | 2016-12-07 | 张明辉 | Multi-functional fingerprint displaying cabinet |
| CN110954529A (en) * | 2019-11-04 | 2020-04-03 | 厦门市集美区乐安中学 | Iodine vapor fingerprint detection device |
| CN116400068A (en) * | 2023-02-13 | 2023-07-07 | 泉州圣源警用侦察设备有限公司 | Reagent for revealing potential biological trace containing DNA and revealing method |
-
2014
- 2014-04-09 CN CN201410139082.8A patent/CN103932712A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106175783A (en) * | 2016-09-26 | 2016-12-07 | 张明辉 | Multi-functional fingerprint displaying cabinet |
| CN110954529A (en) * | 2019-11-04 | 2020-04-03 | 厦门市集美区乐安中学 | Iodine vapor fingerprint detection device |
| CN116400068A (en) * | 2023-02-13 | 2023-07-07 | 泉州圣源警用侦察设备有限公司 | Reagent for revealing potential biological trace containing DNA and revealing method |
| CN116400068B (en) * | 2023-02-13 | 2023-09-22 | 泉州圣源警用侦察设备有限公司 | Reagent for revealing potential biological trace containing DNA and revealing method |
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Application publication date: 20140723 |