CN2043759U - Optotarget for speed measuring - Google Patents
Optotarget for speed measuring Download PDFInfo
- Publication number
- CN2043759U CN2043759U CN 88219444 CN88219444U CN2043759U CN 2043759 U CN2043759 U CN 2043759U CN 88219444 CN88219444 CN 88219444 CN 88219444 U CN88219444 U CN 88219444U CN 2043759 U CN2043759 U CN 2043759U
- Authority
- CN
- China
- Prior art keywords
- light
- speed
- optical
- activated element
- target
- Prior art date
- 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.)
- Expired - Lifetime
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Abstract
The utility model discloses a photoelectric target for speed measuring mainly used for measuring the speed of bullets with small aperture (gun bullets, shells with small aperture). The photoelectric target for speed measuring adopts a filament lamp bulb which is supplied by a DC regulated power supply as a light source, and forms a bunch of thin parallel light by a screw lens, and an exiting aperture; the parallel light is accumulated on the sensitive surface of a vacuum photodiode by bundling optical fiber. When bullets pass through the parallel light, part of light ray is prevented, forming an optical signal; the optical signal is changed into an electrical signal by the photodiode, then amplified by an electronic circuit, and output in the form of an electrical pulse, which is used for starting (or stopping) timing of an electronic time meter.
Description
The utility model is a kind of optical target that is used to test the speed, and is mainly used in the speed of measuring small-bore bullet (bullet, whizbang).
Along with the development of photoelectric technology, traditional speed measuring device such as coil target, copper wire target are progressively replaced by optical target.At present, the optical target of the band light source that is used to test the speed has many kinds, the BALLS15 optical target of for example Austrian AVL company development and production, AVL450 laser target, AVL470 optical target etc.These instrument and equipments in use all expose deficiency separately, or price is too expensive, or performance is not ideal enough, or make and debug relatively difficulty etc.
The utility model designs at above situation, and purpose is to realize that a kind of performance is more stable reliable and cost is cheaper, maintenance is used to the optical target technical scheme that tests the speed eaily.
Solution of the present utility model:
The design is made up of optical transmitting set (1) and optical receiver (2) two parts.Optical transmitting set penetrates a branch of approximate directional light, and (outgoing diaphragm (3) width is l
1, thickness is d
1); Incident diaphragm (4) width of optical receiver is l
2, thickness is d
2
The outgoing diaphragm (3) of optical transmitting set and the incident diaphragm (4) of optical receiver have constituted the visual field of optical target, and this visual field is called the light curtain again, and its width is l, and length equals the distance h of outgoing diaphragm and incident diaphragm.
When bullet when injecting perpendicular to the direction of light curtain, body (5) is with deluster a part of incident light of receiver of screening, so the luminous flux of the light by optical receiver incident diaphragm changes, light activated element in the optical receiver and electronic circuit are transformed into electric pulse output with this variation, this electric impulse signal is linked on the electric time keeping instrument can be started or stop timing.
Two above-mentioned devices of cover and an electric time keeping instrument (6) are promptly formed a velocity-measuring system.The calculating of speed and disposal route and coil target, copper wire target are identical.
Being characterized as of the technical program: incandescent lamp bulb (7) visible light emitted by the D.C. regulated power supply power supply becomes very thin approximate parallel beam through condenser (8), Fresnel lens (9), outgoing diaphragm (10), shine on the photosurface of light activated element (13) through incident diaphragm (11), boundling light transmitting fiber (12), electronic circuit (14) amplifies the electric signal of light activated element output and handles also output electric pulse again.
The approximate parallel beam of above what is called promptly refers to exist certain scattering angle by the light of the every bit ejaculation of outgoing diaphragm, but the scattered beam axis of symmetry that the difference of outgoing diaphragm penetrates is parallel to each other.
The boundling light transmitting fiber is bundled into plastic optical fiber, by line spread, is circle shape plane at the exit end of light at the incident end of light.
Light activated element adopts the end-window vacuum photodiode.
Parts in this programme (7-9) constitute optical transmitting set, and parts (10-14) constitute optical receiver.
The utility model advantage:
Adopt incandescent lamp as light source cost more much lower than the optical target of making light source with laser tube; Adopt the combined ratio of Fresnel lens and boundling light transmitting fiber can do widelyer (the wide l=170 millimeter in AVL BAL LS15 optical target visual field, the technical program can be accomplished 400 millimeters) with optical system (Austrian AVL BAL LS15 optical target just belongs to this structure) the visual field width l that two cylindrical mirrors constitute; And owing to the problem that does not have aberration with boundling light transmitting fiber optically focused, the technical program is much lower with the scheme of two cylindrical lenses to the technical requirement ratio of optical element, thereby is easy to make; Because this programme adopts vacuum photodiode to make light activated element, not only parameter stability, be convenient to produce, and help improving functional reliability; The components and parts price that this programme adopted is not high easy to utilize.
Fig. 1 is the utility model measuring principle synoptic diagram.
Fig. 2 is the utility model structural representation (wherein (a) is side view, (b) is top view).
Embodiment:
Incandescent lamp adopts 10～20 watts of the bulb powers of elongated coiled filament, slender axles should be parallel to outgoing diaphragm length direction during installation, make light that optical transmitting set penetrates in that to be parallel to light curtain curtain face directional divergence angle big, less perpendicular to light curtain curtain face directional divergence angle.The Fresnel lens focal length is 300 millimeters, 250 millimeters of outgoing diaphragm width, 2 millimeters of thickness.The boundling light transmitting fiber adopts 0.8 mm dia plastic optical fiber to be bundled into, and arranges in a line at the incident end of light, is bundled into the disk that diameter is approximately 15 millimeters at the exit end of light.Photoelectric tube adopts GD-31 type vacuum photo tube.This pipe photosurface is circular, 23 millimeters of optical window effective diameters, spectral response range 3000～8500
, peak wavelength 4400
Claims (3)
1, a kind of optical target that is used to test the speed, it is characterized in that becoming very thin approximate parallel beam through condenser (8), Fresnel lens (9) outgoing diaphragm (10) by incandescent lamp bulb (7) visible light emitted of D.C. regulated power supply power supply, shine on the photosurface of light activated element (13) through incident diaphragm (11), boundling light transmitting fiber (12), electronic circuit (14) amplifies the electric signal of light activated element output and handles also output electric pulse again.
2, by its feature of the described optical target of claim 1, be that the boundling light transmitting fiber is bundled into plastic optical fiber, by line spread, be circle shape plane at the incident end of light at the exit end of light.
3,, be that light activated element adopts the end-window vacuum photodiode by claim 1 and 2 its features of described optical target.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 88219444 CN2043759U (en) | 1988-11-30 | 1988-11-30 | Optotarget for speed measuring |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 88219444 CN2043759U (en) | 1988-11-30 | 1988-11-30 | Optotarget for speed measuring |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2043759U true CN2043759U (en) | 1989-08-30 |
Family
ID=4851789
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 88219444 Expired - Lifetime CN2043759U (en) | 1988-11-30 | 1988-11-30 | Optotarget for speed measuring |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2043759U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101943549A (en) * | 2010-08-03 | 2011-01-12 | 西安工业大学 | All-weather speed-measuring sky screen target |
-
1988
- 1988-11-30 CN CN 88219444 patent/CN2043759U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101943549A (en) * | 2010-08-03 | 2011-01-12 | 西安工业大学 | All-weather speed-measuring sky screen target |
| CN101943549B (en) * | 2010-08-03 | 2013-03-20 | 西安工业大学 | All-weather speed-measuring sky screen target |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| CU01 | Correction of utility model patent |
Correction item: Applicant Correct: Liu Zhengting False: Liu Zhengxing Number: 35 Page: 107 Volume: 5 Correction item: Description False: The instruction page is correct Number: 35 Page: 107 Volume: 5 Correction item: Designer Correct: Liu Zhengting False: Liu Zhengxing Number: 35 Page: 107 Volume: 5 |
|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| COR | Change of bibliographic data |
Free format text: CORRECT: APPLICANT; FROM: ZHANG HUAZHI TO: ZHANG HUAXIN; DESIGNER; FROM: ZHANG HUAZHI TO: ZHANG HUAXIN |
|
| C17 | Cessation of patent right | ||
| CX01 | Expiry of patent term |