CN2048974U - Microwave detector for firer articals charging quality - Google Patents
Microwave detector for firer articals charging quality Download PDFInfo
- Publication number
- CN2048974U CN2048974U CN 89207788 CN89207788U CN2048974U CN 2048974 U CN2048974 U CN 2048974U CN 89207788 CN89207788 CN 89207788 CN 89207788 U CN89207788 U CN 89207788U CN 2048974 U CN2048974 U CN 2048974U
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- CN
- China
- Prior art keywords
- microwave
- priming system
- charging quality
- quality
- firer
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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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Abstract
The utility model relates to a microwave detector for firer articles charging quality, which belongs to detecting devices for firer articles charging quality. The utility model is a device utilizing the microwave measurement philosophy and technique to detect the charging quality of firer articles which are made of non-metallic materials, and can automatically detect the dynamite-leaking dead section, the evenness of dynamite, the charge density, fissures, etc. The utility model has the advantages of simple structure, reliable performance, low cost, no high pressure, no radiation hazard, safe and reliable operation, convenient adjustment, easy actual application for engineering, etc.
Description
The utility model relates to a kind of device that detects the priming system charging quality, belongs to priming system charging quality checkout equipment.
For a long time, the charging quality of priming system (Nonel, safety fuse, detonator, detonating primer etc.) detection, the particularly continuous automatic inspection in its production run are difficult task on the engineering always.Once adopt measuring techniques such as ultrasound wave, infrared ray and various rays, observed and surveyed the powder charge situation and the crack of priming system inside, but because the priming system volume is little, partial structurtes are complicated, inflammable, explosive, characteristics such as transmissivity is low, and be difficult to realize.Adopt X-ray machine to survey, then exist shortcoming such as cost an arm and a leg, high pressure amplitude is penetrated.
The utility model is to utilize microwave measurement principle and technology and the priming system that nonmetallic materials are manufactured developed carries out the device that charging quality detects.Adopt the utility model, can detect powder-leaking dead section in the priming system, dose uniformity coefficient, charge density, crack etc. automatically.
Principal feature of the present utility model has:
One, microwave or millimeter wave carry out Non-Destructive Testing as the signal source that the priming system charging quality is surveyed to priming system powder charge situation.
Two, the utility model is that detected priming system is contained among the waveguide, and places the position of space electric field in the waveguide or changes of magnetic field sensitivity, thereby has obtained tangible reflection wave, has realized the success with microwave sounding priming system charging quality;
Three, the utility model has utilized the reflection coupling branch line of symmetrical placement dexterously, thereby has eliminated background interference effectively, has realized in highly sensitive system, extracts the weak reflection wave signal that has tested explosive charging quality information;
Four, in the utility model, the microwave coupling is very crucial parts, it and other relative section have been finished signal allocation, phase shift jointly and reflected signal have been done multiple effect such as the synthetic and directional transmissions of vector, thereby have guaranteed realization of the present utility model.
Composition frame chart of the present utility model is seen accompanying drawing I: it is by microwave signal source (1), microwave level controller (3), microwave coupling (5), priming system detection head (6) (also claiming the test branch line), reference load branch line (7), microwave remote sensor and level amplifier (10), quality display formations such as (11).
The utility model principle of work is as follows: send oscillating electromagnetic wave by microwave signal source (1), transfer to microwave coupling (5) via microwave level controller (3), utilize the electromagnetic characteristic of directional couple of coupling (5), to be sent to the electromagnetic wave of microwave coupling (5), be divided into two-way, send in priming system detection head (6) and the reference member year branch line (7).Priming system detection head (6) is a rectangular waveguide (6 ') that tested explosive is housed (with reference to the accompanying drawings 4) and a matched load (8), and priming system is inserted in the hole, garden (21) of rectangular waveguide (6 ').After the road microwave signal that enters detection head (6) is run into tested explosive, will produce reflection wave.The priming system that charging quality is qualified will produce a fixation reflex to the microwave signal of importing, and to the underproof priming system of charging quality, the power of its reflected signal will change thereupon; Another road enters the microwave signal of reference load branch line (7), will make this branch line produce another fixation reflex signal.This two femoral reflex signal when turning back to microwave coupling (5), generates the vector composite signal, and this composite signal will be sent to after inspection sensor and level amplifier (10) be detected and amplify, and send into quality display (11), display result.
The utility model is to judge the priming system quality with the power level of reflection wave vector composite signal, introduces this principle below in conjunction with accompanying drawing 2; Accompanying drawing 2 is the working state figure of microwave coupling (5), the wherein outstanding incident wave that shown
1, reflection wave
2,
3, composite wave
2+
3Transmission status.Among the figure
1Be injected into the input microwave signal of end face (4) for signal source;
2Be the reflected signal that produces by priming system detection head (6);
3The reflection wave signal that expression produces with reference to branch line (7), and following relation is arranged:
In last two formulas, z
0Be the characteristic impedance of ripple, z
2, z
3Be respectively the equiva lent impedance that priming system detection head (6) and reference load branch line (7) present in its reflection wave output port (14) and (15), φ
2, φ
3Be respectively the phase factor that is caused by path length difference, k is a coupling factor, adopts three decibels coupled in reverse wi electric bridge if microwave coupling connects (5), and two branch lines (6) and (7) then have when symmetrical: k=
, and △ φ=| φ
2-φ
3|=π is (promptly
2With
3) anti-phase, at this moment, at the available power level P of input end face (16) of microwave remote sensor and level amplifier
4Should direct proportion in appear at composite wave amplitude on this end face square, promptly
P
4∞｜
2＋
3｜
2＝ (｜a
1｜
2)/2 ｜ (Z3-Z0)/(Z3+Z0) － (Z
3-Z
0)/(Z
3+Z
0) ｜
2
Point out the front, z
3Be the port equiva lent impedance of reference load (7), it is a definite value.|
1| with z
0Also be constant in measurement.Therefore, has only z in the following formula
2Variation can cause P
4Variation, and z
2Change change and cause that this has just realized the process with reflection wave level detection priming system charging quality owing to inserting in the waveguide branch line (6 ') the priming system charging quality again.This concerns being expressed as of image:
The variation of tested explosive charging quality → microwave impedance z
2Variation → detection level P
4Variation → charging quality detect and realize.
According to Manufactured quality testing meter, through measured test, can find out the quantitative corresponding relation between P4 and the fire detecting worker product quality, and to detect count demarcate after, promptly available it detect the equipment of priming system quality.
Accompanying drawing 3 is an embodiment of the present utility model.It can be used for detecting the charging quality of primacord fuse.In this complete equipment, the microwave coupling adopts microwave magic-T junction (5); The ripple level controller is to be made of isolator (2) and variable attenuator (3 ') slightly; The reference load branch line is to constitute with matched load (8) with one section waveguide segment (7 ') that inserts the up-to-standard priming system of standard; Priming system detection head (6) is to constitute with matched load (8) with one section waveguide segment (6 ') that inserts tested explosive, for guaranteeing that primacord fuse guiding device (13) (its structure is seen accompanying drawing 5) has also been added in the dragline continuous coverage in detection head.(9) are that microwave remote sensor (10 ') is a level amplifier in the accompanying drawing 3, and their effect is to be low frequency signal with the microwave level conversion, and is amplified; (11) be the charging quality display; (12) be observation oscilloscope; This example new type of microwave signal source, the solid-state signal source (1 ') of employing 9.630GHZ, the power level of injection port (4) is about 20mw.Adopt the present embodiment measurement result to be:
1. to no medicine dead band (length 〉=1cm)
The indicator level can reach 92.5 μ A
The oscillograph level is about 60mv
2. to the section (length 〉=1cm) of dose deficiency
The indicator level is between 92.5 μ A～65 μ A.
The oscillograph level is about between 60mv～50mv.
3. qualified full powder charge section (length 〉=1cm)
The indicator level is 50 μ A
The oscillograph level is about 40mv
Advance to measure branch line (6) owing to adopted the insertion guiding device (13) of tested explosive to insert tested explosive continuously, thereby this equipment also is applicable to the quality monitoring in the production run with changing.In addition, the middle aperture (21) of waveguide segment (6 ') is used to guide primacord fuse to use in the accompanying drawing 4; Plastic ferrule (17) and pressure pad volution (18) are used to prevent primacord fuse (20) and directly wearing and tearing of waveguide aperture (21).Hole, garden (19) on the guiding device in the accompanying drawing 5 (13) is the external guidance that is used for primacord fuse (20).
Major advantage of the present utility model is as follows:
1. simple in structure, dependable performance is convenient to realize that engineering uses and be generalized to the on-line monitoring of priming system production line. Used components and parts all can have been bought on market, and are cheap. And do not have high pressure, radiationless, handling safety is regulated easyly, uses the multiple advantages such as reliable.
2. adopted dexterously the weak reflected signal of guided wave coupling extraction from priming system, realized utilizing symmetrical comparison principle to eliminate the scattering mismatch signal that non-priming system charging quality changes.
3. do not adopt over habitual, that penetrate with antenna irradiation, low sensitivity mode. And directly priming system is introduced the leading waveguide, and the priming system qualitative factor is very responsive to the incidence wave reaction, thereby realized detecting with the back wave extracting method strategy of priming system charging quality, and this will be conducive to open up this frontier.
4. the electric test signal with priming system charging quality information to obtaining is easy to be extended to various monitoring and index signal, namely can be used for quality inspection, also can be used for the quality monitoring in the production process.
5. the utility model can be used microwave, also can use millimeter wave, and these two kinds of ripples all available waveguide transmit. Used circuit can be integrated, and further reduced volume, testing process also can be introduced microcomputer control.
Attached: the explanation of accompanying drawing title:
Accompanying drawing 1: priming system charging quality Microwave Measurement meter composition frame chart;
Accompanying drawing 2: the working state figure of microwave coupling;
Accompanying drawing 3: priming system charging quality Microwave Measurement meter embodiment composition frame chart;
Accompanying drawing 4: firer's product examine is surveyed waveguide and is implemented structural drawing in the Microwave Measurement head;
Accompanying drawing 5: the primacord fuse guiding device is implemented structural drawing.
Claims (1)
1, a kind of priming system charging quality Microwave Measurement meter, it is by microwave signal source (1), microwave level controller (3), microwave coupling (5), priming system detection head (6), reference load branch line (7), microwave remote sensor and level amplifier (10) and quality display (11) are formed, and it is characterized in that:
1. microwave level controller (3) is to be made of isolator (2) and variable attenuator (3 ');
2. microwave coupling (5) adopts microwave magic-T junction (5 ') or other 3dB directional coupler.
3. priming system detection head (6) is a rectangular waveguide (6 ') and a matched load (8) that tested explosive is housed, and priming system is gone in the hole, garden (21) of rectangular waveguide (6 ') by skewer;
4. reference arm (7) is the waveguide segment (7 ') and coupling electric loading (8) formation of going into normal charge quality priming system with one section skewer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 89207788 CN2048974U (en) | 1989-06-14 | 1989-06-14 | Microwave detector for firer articals charging quality |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 89207788 CN2048974U (en) | 1989-06-14 | 1989-06-14 | Microwave detector for firer articals charging quality |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2048974U true CN2048974U (en) | 1989-12-06 |
Family
ID=4864583
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 89207788 Withdrawn CN2048974U (en) | 1989-06-14 | 1989-06-14 | Microwave detector for firer articals charging quality |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2048974U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103940833A (en) * | 2014-04-30 | 2014-07-23 | 嘉兴市特种设备检测院 | Detection method and detection device for welded joint defects of polyethylene pipe |
-
1989
- 1989-06-14 CN CN 89207788 patent/CN2048974U/en not_active Withdrawn
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103940833A (en) * | 2014-04-30 | 2014-07-23 | 嘉兴市特种设备检测院 | Detection method and detection device for welded joint defects of polyethylene pipe |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| 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 |