CN2526863Y - Portable metal detector - Google Patents
Portable metal detector Download PDFInfo
- Publication number
- CN2526863Y CN2526863Y CN 02200912 CN02200912U CN2526863Y CN 2526863 Y CN2526863 Y CN 2526863Y CN 02200912 CN02200912 CN 02200912 CN 02200912 U CN02200912 U CN 02200912U CN 2526863 Y CN2526863 Y CN 2526863Y
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- China
- Prior art keywords
- collimating apparatus
- radiation
- detection instrument
- metal detection
- potable metal
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- Geophysics And Detection Of Objects (AREA)
- Analysing Materials By The Use Of Radiation (AREA)
- Measurement Of Radiation (AREA)
Abstract
The utility model discloses a potable metal detector, consisting of a ray emitter, a ray receiver, a signal identifying and shaping device, a data storage processor, an optical alarm and a power supply etc six parts. The utility model can be used for detecting whether such dangerous articles as a gun or a dagger is concealed in human body, baggage or package in 5 meters, and has the advantages of small size, low weight, rational price, safe and simple operation, and exact and reliable detection etc., which can be used in rapid inspections of luggage or human body in such public occasions as airport or station.
Description
The utility model relates to a kind of object detection instrument, a kind of instrument that nuclear radiation source detect to be ensconced the metal threat object product that luggage, parcel or human body carry of using of more specifically saying so.
At present, on the airport, the metal detection equipment that generally uses of public places such as station, customs generally is divided into two classes: the one, checked luggage parcel is placed on one is on the travelling belt of U font, the cross break portion of travelling belt surrounds the shielding passage by fender wall, at the other ray emitter of placing of travelling belt.Monitor is equipped with at the place at the shielding feeder connection, places detector from shielding channel outlet a distance; The 2nd, abut against the human body appearance with detector and move, when detecting the containing metal thing, instrument can send interrupted alarm song.The equipment heaviness of first method, shielding also bothers, and detected object generally is an object; Second method is surveyed must be near the human body appearance, thereby when needing among the moving group of convection current (comprising its hand-baggage) terrorist under a cloud to detect and don't startling this object, this method has just been brought certain limitation.
The purpose of this utility model is to overcome above-mentioned the deficiencies in the prior art part, and a kind of potable metal detection instrument is provided, be applicable to detect be positioned at five meters with human body, luggage, parcel whether keep the dangerous goods of metals such as gun, dagger.
The purpose of this utility model is achieved through the following technical solutions.
As everyone knows, when a branch of lower energy photon, for example X ray or gamma-rays, when shining on metal, human body or other non-metallic objectsit is not a metal object respectively, the quantity of the ray that reflects has certain difference, if this difference more significantly greater than measuring error, then can differentiate whether there is metallic article in the reverberation according to the difference on the amount of radiation that reflects.The utility model just is based on above principle.
A kind of potable metal detection instrument, it comprises ray emitter, described ray emitter is made up of low-energy photon source, protective shielding body and emitted radiation collimating apparatus three parts; Ray receiver, described ray receiver is made up of radiation detector, prime amplifier, received radiation collimating apparatus and anti-interference radiation shield cover; The signal screening former, described signal screening former is made up of pulse amplifier and single-channel analyzer; The data storage processing device, described data storage processing device is made up of timer conter, data-carrier store, operational amplifier and microprocessor; The optoacoustic warning horn is made up of the luminous circuit for alarming of sound equipment; And power supply.
Fig. 1 is the theory diagram of the utility model potable metal detector.
Ray emitter produces and emitted radiation.The utility model adopts low-energy photon source, and for example low-energy gamma source or x-ray source are as emissive source.So, be foolproof to operating personnel.The emitted radiation collimating apparatus is made hollow cylinder, and the shield material can be by tungsten or plumbous the composition.Ray receiver received radiation, and the corresponding electric signal of conversion output.Wherein radiation detector can be with Geiger M or scintillation detector.The received radiation collimating apparatus receives the ray that reflects from related parts of human body, and limits the ray next from the place ahead, and available tungsten or lead are made.The signal screening former will amplify from the electric signal that receiver comes, and chooses useful electric signal, and it is configured as the standard electric pulse signal.Wherein the amplification of electric signal is finished by prime amplifier and pulse amplifier, and the output signal of pulse amplifier is fed to single-channel analyzer, screens out the signal of corresponding scattered photon amplitude, and makes signal shaping.After the data storage processing device will be reduced to digital signal corresponding to the electric pulse of accepting radiation, store, analyze by measurement period.Provide corresponding to the signal that receives abnormal radiation amount (metal objects) by the optoacoustic alarm at last, and start luminotron and sound the alarm.Power supply is supplied with the high and low pressure power supply.Adopt 1.5 volts of dry cells of four joints to provide required high and low pressure power supply by translation circuit.The used power supply of detector is generally supreme kilovolt of several hectovolts.
The collimating aperture of the described emission collimating apparatus in the described ray emitter is shaped as circle or rectangular, the linear width of the collimating aperture of emission collimating apparatus is 1mm～6mm, the degree of depth in hole is that 3～15mm and protective shielding body are connected as a single entity, and the wall thickness of shield is greater than 4mm.
The size of the described received radiation collimating apparatus in the described ray receiver is according to the size decision of detector, the wall thickness of described received radiation collimating apparatus is greater than 4mm, the length of described received radiation collimating apparatus exceeds the place ahead of scintillator at least, and this length is 25mm～40mm.
The described anti-interference radiation shield cover and the described received radiation collimating apparatus of described ray receiver can be selected one as required for use, perhaps both all can omit need not.
The sound equipment of described optoacoustic warning horn or luminous warning can be selected one as required for use.
The utility model is described in further detail below in conjunction with embodiment.
Fig. 2 is a potable metal detection instrument structural representation, adopts the scintillation detector of being made up of photomultiplier and NaI scintillator as the embodiment radiation detector.Among the figure
1-low-energy photon source
2-shield
3-emission collimating apparatus
4-block door
5-scintillator (NaI)
6-reception collimating apparatus
7-photomultiplier
8-prime amplifier
9-electronics circuit (comprises pulse amplifier, single-channel analyzer, timer conter, number
According to storer, operational amplifier, microprocessor, do not mark among the figure)
10-battery
11-loudspeaker
12-pilot lamp
In the place ahead of emission collimating apparatus 3, can have one and block door 4 by what lead was made, when this detection instrument was in closed condition, this blocked door and 4 is used to block ray to external radiation.Scintillator 5 is close on the photomultiplier 7.
Receive collimating apparatus 6, scintillator 5, photomultiplier 7, prime amplifier 8 and be contained in together in the sleeve of being made by duralumin, the cover tube bottom is equipped with spring, keeps in touch good.The shell of whole potable metal detection instrument is made by duralumin, and its overall dimensions are about 30 * 12 * 8cm
3
The collimating aperture of emitted radiation collimating apparatus 3 is circular, and the diameter of collimating aperture is 3mm, and the degree of depth in hole is that 5mm and protective shielding body 2 are connected as a single entity, and the thickness of shield 2 is 5mm.Received radiation collimating apparatus 6 wall thickness are 5mm, its length 30mm.
Fig. 3 is the electronics circuit fundamental diagram of potable metal detection instrument.
As embodiment, the low energy that the utility model adopts is americium-241, and source strength can be very safe to operating personnel from tens millicuries to 2 Curie.The radiation detector of ray receiver part adopts scintillation detector, comprises NaI scintillation crystal 5, photomultiplier 7 and prime amplifier 8.Ray particle is fallen in the NaI scintillation crystal and is caused passage of scintillation light.Passage of scintillation light is got photoelectron on the negative electrode of photomultiplier 7.Photomultiplier 7 makes the several magnitudes of photoelectron current multiplication, and the electric impulse signal that output is corresponding is delivered to the main pulse amplifier through prime amplifier 8 again and amplified.Fig. 4 is the pulse amplitude spectrum of main pulse amplifier output signal.X-axis indicating impulse amplitude wherein, Y-axis indicating impulse counting.
The examination that single-channel analyzer is finished signal is shaped.Single-channel analyzer has two discrimination thresholds up and down, and their setting should guarantee to write down effectively the reflection photon and eliminate background and noise.The impulse feeding of single-channel analyzer output makes the electric impulse signal corresponding to received radiation be reduced to digital signal to timer conter, and by data-carrier store, operational amplifier, microprocessor this digital signal is analyzed by the measurement period storage.At last, finding to have under the situation that exceeds measuring error counting existence in addition, optoacoustic alarm output alarm signal starts the optoacoustic warning circuit, sends the optoacoustic alarm.
The used power supply of the utility model by dry cell of four joints totally 6 volts provide through power supply chip, wherein photomultiplier voltage is for bearing 700V, remainder is 12V.
This potable metal detection instrument was no more than for 2 seconds to the Measuring Time of every detected object (comprising people or object), the beam of this instrument radiation is a narrow beam, search is strafed in instantaneous part tested people, suppose to sweep and get ten points, every shone 0.1 second, and then timing is collected the counting of useful pulse in 2 seconds, can find the counting of abnormal point, can declare the metal object that may exist.Can certainly be designed so that Measuring Time was greater than or less than for 2 seconds, sampling spot is changeable also.
The physical dimension of this detection instrument is 30 * 12 * 8cm
3, weight is less than 2.5kg.
The utility model is compared with prior art, has that volume is little, in light weight, price is suitable, handling safety is simple and surveys and wait advantage accurately and reliably.
The processing safety of detection instrument of the present utility model is very high, and for example applied energy is the photon of 60keV, and source strength is 3.7 * 10
10/ s (=1 Curie), shield is the lead of wall thickness 5mm, under the condition that all work 24 hours all day, the irradiation dose that is subjected to the whole year be lower than ten thousand of nuclear facilities surrounding resident year acceptable dose/.
The usefulness that this detection instrument can be used as airport, station or check luggage in other places, parcel or human body keep the fast detecting of metal dangerous material.
Claims (5)
1. a potable metal detection instrument comprises ray emitter, and described ray emitter partly is made up of low-energy photon source, protective shielding body and emitted radiation collimating apparatus three; Ray receiver, described ray receiver is made up of radiation detector, prime amplifier, received radiation collimating apparatus and anti-interference radiation shield cover; The signal screening former, described signal screening former is made up of pulse amplifier and single-channel analyzer; The data storage processing device, described data storage processing device is made up of timer conter, data-carrier store, operational amplifier and microprocessor; The optoacoustic warning horn, described optoacoustic warning horn is made up of and power supply six major parts sound equipment, luminous warning circuit.
2. potable metal detection instrument according to claim 1, the collimating aperture that it is characterized in that described emission collimating apparatus is shaped as circle or rectangular, the linear width of the collimating aperture of emission collimating apparatus is 1mm～6mm, the degree of depth in hole is 3～15mm, be connected as a single entity with the protective shielding body, the wall thickness of shield is greater than 4mm.
3. potable metal detection instrument according to claim 1, it is characterized in that of the size decision of the size of described received radiation collimating apparatus according to detector, the wall thickness of described received radiation collimating apparatus is greater than 4mm, the length of described received radiation collimating apparatus exceeds the place ahead of scintillator at least, is 25mm～40mm.
4. potable metal detection instrument according to claim 1 is characterized in that the described anti-interference radiation shield cover and the described received radiation collimating apparatus of described ray receiver, can select one as required for use, perhaps both all can omit need not.
5. potable metal detection instrument according to claim 1 is characterized in that the sound equipment of described optoacoustic warning horn or luminous warning can select one as required for use.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02200912 CN2526863Y (en) | 2002-01-17 | 2002-01-17 | Portable metal detector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02200912 CN2526863Y (en) | 2002-01-17 | 2002-01-17 | Portable metal detector |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2526863Y true CN2526863Y (en) | 2002-12-18 |
Family
ID=33683960
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 02200912 Expired - Fee Related CN2526863Y (en) | 2002-01-17 | 2002-01-17 | Portable metal detector |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2526863Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101379415B (en) * | 2005-10-24 | 2013-07-17 | 美国科技工程公司 | X-ray inspection based on scatter detection |
| CN107067613A (en) * | 2017-04-28 | 2017-08-18 | 福建师范大学 | A kind of safety alarm system and its method |
| CN110879423A (en) * | 2019-12-18 | 2020-03-13 | 君安南通特种装备科技有限公司 | Portable metal detector and detection method thereof |
-
2002
- 2002-01-17 CN CN 02200912 patent/CN2526863Y/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101379415B (en) * | 2005-10-24 | 2013-07-17 | 美国科技工程公司 | X-ray inspection based on scatter detection |
| CN107067613A (en) * | 2017-04-28 | 2017-08-18 | 福建师范大学 | A kind of safety alarm system and its method |
| CN110879423A (en) * | 2019-12-18 | 2020-03-13 | 君安南通特种装备科技有限公司 | Portable metal detector and detection method thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |