CN109405653A - Bilateral double-receiver array light curtain - Google Patents
Bilateral double-receiver array light curtain Download PDFInfo
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- CN109405653A CN109405653A CN201811319671.9A CN201811319671A CN109405653A CN 109405653 A CN109405653 A CN 109405653A CN 201811319671 A CN201811319671 A CN 201811319671A CN 109405653 A CN109405653 A CN 109405653A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F41—WEAPONS
- F41J—TARGETS; TARGET RANGES; BULLET CATCHERS
- F41J5/00—Target indicating systems; Target-hit or score detecting systems
- F41J5/02—Photo-electric hit-detector systems
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- General Engineering & Computer Science (AREA)
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Abstract
Bilateral double-receiver array light curtain, two array acceptors are respectively provided with by every side in an opposite side of frame structure to form entire optical detection coordinate surface, it can be avoided the existing overlap joint coupling phenomenon of neighboring receivers array for a phenomenon that array acceptor needs dog-ear to be arranged or two front-back staggereds occur, it is respectively carried out convenient for every side independent sealed, to be conducive to improve indication of shots precision and indication of shots reliability, reduce the failure that working service may face, it is characterized in that, including frame structure, the left side of the frame structure is provided with the first array acceptor and the second array acceptor, the right side of the frame structure is provided with third array acceptor and the 4th array acceptor, the right side inferior horn of the frame structure is provided with the first transmitter, angle is provided with the second transmitter on the right side of the frame structure , the left side inferior horn of the frame structure is provided with third transmitter, and angle is provided with the 4th transmitter on the left side of the frame structure.
Description
Technical field
The present invention relates to electric target light curtain technology, especially a kind of bilateral double-receiver array light curtain, by frame knot
Every side in one opposite side of structure is respectively provided with two array acceptors to form entire optical detection coordinate surface, can be avoided out
The neighboring receivers array of a phenomenon that existing array acceptor needs dog-ear to be arranged or two front-back staggereds is existing to overlap coupling
Phenomenon is closed, is respectively carried out convenient for every side independent sealed, it is no longer necessary to carry out intersecting linking sealing, reduce mounting process hardly possible
Degree reduces the failure that working service may face to be conducive to improve indication of shots precision and indication of shots reliability.
Background technique
Light curtain electric target generally passes through two transmitters and two array acceptors surround a quadrangle optical detection and sit
Mark face, the angle of departure of two transmitters are 90 degree, and a transmitter is located at the lower right corner, another transmitter is located at the lower left corner.
There is one array acceptor of corresponding lower right corner transmitter two side, that is, tops and the left side, top and the left side to be connected in the upper left corner
Form dog-ear (such as vertical linking angle).Another array acceptor of corresponding lower left corner transmitter have two side, that is, tops and
The right, top and the right are connected to form dog-ear (such as vertical linking angle) in the upper right corner.The inventors discovered that at beveled structure
Optical path sealing is difficult to realize, and dog-ear sealing structure may cause the interference of the reception to 45 degree of diagonal line optical paths, increases installation and dimension
Protect difficulty, moreover, at dog-ear the linking precision of array acceptor during installation also it is difficult to ensure that.Even if by what is be connected by dog-ear
With two while an array acceptor split into independent two while, that is, become two array acceptors, then carry out before
After shift to install, for the neighboring receivers array of two front-back staggereds remain in the presence of overlap joint coupling phenomenon, that is, still need
Intersect linking sealing.Inventors believe that if every side in an opposite side of frame structure is respectively provided with two receivers
Array is to form entire optical detection coordinate surface, it is no longer necessary in sides adjacent setting array acceptor (for example, only in the left and right sides
Be arranged array acceptor, and the upper side and lower side is without array acceptor), this can the opposite side every side respectively into
Row sealing does not need intersect linking sealing, reduces technique requirement, improve reliability.In view of this, the present inventor is complete
At the present invention.
Summary of the invention
The present invention is in view of the deficiencies in the prior art or insufficient, provides a kind of bilateral double-receiver array light curtain, leads to
The every side crossed in an opposite side of frame structure is respectively provided with two array acceptors to form entire optical detection coordinate surface,
It can be avoided the neighboring receivers array for a phenomenon that array acceptor needs dog-ear to be arranged or two front-back staggereds occur to deposit
Overlap joint coupling phenomenon, respectively carried out convenient for every side independent sealed, it is no longer necessary to carry out intersect linking sealing, reduce peace
Technology difficulty is filled, to be conducive to improve indication of shots precision and indication of shots reliability, reduces the failure that working service may face.
Technical solution of the present invention is as follows:
Bilateral double-receiver array light curtain, which is characterized in that including frame structure, the left side of the frame structure is arranged
There are the first array acceptor and the second array acceptor, the right side of the frame structure is provided with third array acceptor and
Four array acceptors, the right side inferior horn of the frame structure are provided with the first transmitter, and angle is set on the right side of the frame structure
It is equipped with the second transmitter, the left side inferior horn of the frame structure is provided with third transmitter, angle on the left side of the frame structure
It is provided with the 4th transmitter.
First array acceptor is corresponding with first transmitter formation light transmitting-receiving, second array acceptor
Corresponding with second transmitter formation light transmitting-receiving, the third array acceptor and the third transmitter form light and receive
Hair corresponds to, and the 4th array acceptor is corresponding with the 4th transmitter formation light transmitting-receiving.
The frame structure is solid space structure, and the solid space structure includes front layer and back layer, before described
First array acceptor is arranged in the left side of surface layer, and second array acceptor is arranged in the left side of the back layer,
The third array acceptor is arranged in the right side of the front layer, and the 4th receiver is arranged in the right side of the back layer
First transmitter, angle on the right side of the solid space structure is arranged in array, the right side inferior horn of the solid space structure
Second transmitter is set, and the third transmitter, the solid space is arranged in the left side inferior horn of the solid space structure
The 4th transmitter is arranged in angle on the left side of structure.
First transmitter is located at the front layer, and second transmitter is located at the back layer, the third hair
It penetrates machine and is located at the front layer, the 4th transmitter is located at the back layer.
First transmitter, first array acceptor, the third transmitter and the third array acceptor
In approximately the same plane, second transmitter, second array acceptor, the 4th transmitter and the described 4th are connect
Receipts machine array is located in approximately the same plane.
Light covering lower-left area is penetrated in the lower right corner upper left that first array acceptor receives the first transmitter transmitting
Light covering top left region, institute are penetrated in domain, the upper right corner lower-left that second array acceptor receives the second transmitter transmitting
It states third array acceptor and receives the lower left corner upper right of third transmitter transmitting and penetrate light covering lower right area, the described 4th
Light covering right regions are penetrated in the upper left corner bottom right that array acceptor receives the 4th transmitter transmitting.
The lower left region and the right regions have light overlapping region, the top left region and the lower right area
With light overlapping region.
First array acceptor and first transmitter by the first matching wavelength form light transmitting-receiving corresponding, institute
It is corresponding by the second matching wavelength formation light transmitting-receiving with second transmitter to state the second array acceptor, the third receives
Machine array and the third transmitter match wavelength form light transmitting-receiving corresponding, the 4th array acceptor and institute by third
It states the 4th transmitter and light transmitting-receiving correspondence is formed by the 4th matching wavelength.
First array acceptor is corresponding by the formation light transmitting-receiving of the first matching direction angle with first transmitter,
Corresponding, the third that second array acceptor and second transmitter by the second matching direction angle form light transmitting-receiving
Corresponding, the 4th receiver battle array that array acceptor and the third transmitter by third matching direction angle form light transmitting-receiving
Column are corresponding by the formation light transmitting-receiving of the 4th matching direction angle with the 4th transmitter.
First array acceptor, second array acceptor, the third array acceptor and the described 4th connect
Receipts machine array all has biserial close-packed configuration straggly before and after receiver, first array acceptor, the second receiver battle array
Respectively there is independent optical path to seal for column, the third array acceptor and the 4th array acceptor, or be combined
Optical path sealing, or carry out whole optical path sealing.
The technology of the present invention effect is as follows: bilateral double-receiver array light curtain of the present invention passes through every side in an opposite side
Setting double-receiver array is just capable of forming entire optical detection coordinate surface, and left, upper, 3, the right side being related to than in the prior art connect
Receipts machine array side reduces an array acceptor side, i.e., the only side of left and right two has array acceptor, without
The array acceptor of upside, the also not no array acceptor of downside, that is to say, that can be avoided one array acceptor of appearance needs
The neighboring receivers array of the phenomenon that wanting dog-ear to be arranged or two front-back staggereds is existing to overlap coupling phenomenon.This facilitates each
Side respectively carries out independent sealed, it is no longer necessary to carry out intersecting linking sealing, mounting process difficulty be reduced, to be conducive to improve
Indication of shots precision and indication of shots reliability reduce the failure that working service may face.
Double-receiver array is arranged in every side in one opposite side, and two array acceptors of the same side can pass through difference
The modes such as space or different wave length or different directions are isolated, and are received corresponding transmitter in a manner of one-to-one and are sent out
The light penetrated realizes the alternate covering of the detection light in entirely detection target surface, to realize impact detection in entire target surface.
This corresponding relationship can also be understood by four transmitting-receiving groups.The corresponding first array acceptor composition first of first transmitter is received
Hair group, corresponding second array acceptor of the second transmitter form the second transmitting-receiving group, and third transmitter corresponds to third array acceptor
Third transmitting-receiving group is formed, corresponding 4th array acceptor of the 4th transmitter forms the 4th transmitting-receiving group.It is the first transmitting-receiving group, described
Second transmitting-receiving group, the third transmitting-receiving group, the 4th transmitting-receiving group intersect, and cover entire detection zone.Described first receives
Hair group and the second transmitting-receiving group are distinguished by space or wavelength is distinguished or direction is distinguished and is isolated, each described to realize
The array acceptor that the signal of the transmitter transmitting of transmitting-receiving group is only organized by this transmitting-receiving receives.The third transmitting-receiving group and
The 4th transmitting-receiving group is distinguished by space or wavelength is distinguished or direction is distinguished and is isolated, to realize each transmitting-receiving group
The array acceptor only organized by this transmitting-receiving of signal of transmitter transmitting receive.
For space distinguish isolation method be described as follows: two transmitting-receiving groups of the same side placement when, spatially every
From, guarantee the array acceptor of each transmitting-receiving group can only receive this transmitting-receiving group transmitter transmitting signal.Such as it will be same
Two transmitting-receiving groups of side are placed on two layers of front and back, and the first transmitting-receiving group is placed in front, and the second transmitting-receiving group is placed in below, the
Three transmitting-receiving groups are placed in front, and the 4th transmitting-receiving group is placed in below, accordingly even when the wavelength of all transmitting-receiving groups is identical, can also lead to
Space isolation is crossed, is formed and intersects light curtain.
The isolation method distinguished for wavelength is described as follows: the transmitting-receiving group work of two of the same side is in different wavelength
On, guarantee that the array acceptor of each transmitting-receiving group can only receive the signal of transmitter transmitting of this transmitting-receiving group.Such as first
The light of the transmitter launch wavelength 650nm of transmitting-receiving group, the first array acceptor only receive the light of wavelength 650nm, the second transmitting-receiving group
Transmitter launch wavelength 940nm light, the second array acceptor only receives the light of wavelength 940nm, accordingly even when the first transmitting-receiving
Group and the second transmitting-receiving group are placed in same layer, can also form intersection light curtain.
Bilateral double-receiver array light curtain, receiver is placed on two opposite side, is guaranteeing to intersect light curtain covering entirely
Under the premise of target surface, the intersection linking of array acceptor is avoided, is sealed so as to avoid to the receiver for intersecting linking, thus
The requirement for reducing production technology improves the reliability of product.The present invention has a characteristic that 1. receivers are placed in relatively
Two sides.2. every side includes at least two array acceptor.3. the corresponding transmitter of array acceptor is respectively in the array acceptor
The array acceptor of front-back staggered is irradiated at the both ends of opposite side respectively.4. array acceptor only needs to carry out respectively in every side close
Envelope does not need intersect linking sealing, reduces technique requirement.5. light curtain is overlapped: lower left region and right regions light curtain weight
Folded, top left region and the overlapping of lower right area light curtain can reduce the required precision of light curtain linking.
Detailed description of the invention
Fig. 1 is the structural schematic diagram for implementing bilateral double-receiver array light curtain of the present invention.
Fig. 2 is another structural schematic diagram for implementing bilateral double-receiver array light curtain of the present invention.
Appended drawing reference lists as follows: before 1-；2- median face；Behind 3-；4- front layer；5- back layer；(the right side 6-
Inferior horn) the first transmitter；7- (angle on right side) second transmitter；8- (left side inferior horn) third transmitter；9- (angle on left side)
Four transmitters；Light is penetrated in the upper left corner 10- bottom right (for covering right regions)；The lower left corner 11- upper right penetrates light (for covering the right side
Lower region)；Light is penetrated in the lower right corner 12- upper left (for covering lower left region)；Light is penetrated (for covering a left side in the upper right corner 13- lower-left
Upper region)；14- (front layer left side) first array acceptor；15- (back layer left side) second array acceptor；16-
(front layer right side) third array acceptor；17- (back layer right side) the 4th array acceptor；18- solid space structure
The lower right corner；The 19- solid space structure lower left corner.20- solid space structure (such as rectangular parallelepiped space structure etc., solid space knot
Structure belongs to a seed type of frame structure).
206- (right side inferior horn) first transmitter；207- (angle on right side) second transmitter；208- (left side inferior horn) third
Transmitter；209- (angle on left side) the 4th transmitter；Light is penetrated in the upper left corner 210- bottom right (for covering right regions)；211- is left
Inferior horn upper right penetrates light (for covering lower right area)；Light is penetrated in the lower right corner 212- upper left (for covering lower left region)；213-
Light is penetrated in upper right corner lower-left (for covering top left region)；214- (left side) the first array acceptor (the first array acceptor
It is corresponding by the first matching wavelength formation light transmitting-receiving with the first transmitter, such as the light of the first transmitter launch wavelength 650nm,
First array acceptor only receives the light of wavelength 650nm；Alternatively, the first array acceptor is matched with the first transmitter by first
Deflection forms light transmitting-receiving and corresponds to)；215- (left side) the second array acceptor (the second array acceptor and the second transmitter
It forms light transmitting-receiving by the second matching wavelength to correspond to, such as the light of the second transmitter launch wavelength 940nm, the second receiver battle array
Column only receive the light of wavelength 940nm；Alternatively, the second array acceptor and the second transmitter form light by the second matching direction angle
Line transmitting-receiving corresponds to)；(third array acceptor is matched with third transmitter by third 216- (right side) third array acceptor
Wavelength forms light transmitting-receiving and corresponds to, and the wavelength of third matching here can also be identical as the first matching wavelength such as 650nm；Alternatively,
Third array acceptor is corresponding by the formation light transmitting-receiving of third matching direction angle with third transmitter)；217- (right side)
(the 4th array acceptor is corresponding by the 4th matching wavelength formation light transmitting-receiving with the 4th transmitter, here for four array acceptors
4th matching wavelength can also be identical as the second matching wavelength such as 940nm；Alternatively, the 4th array acceptor and the 4th transmitter
It forms light transmitting-receiving by the 4th matching direction angle to correspond to)；230- frame structure (such as rectangle structure or rectangular parallelepiped space knot
Structure etc.).
Specific embodiment
With reference to the accompanying drawing (Fig. 1-Fig. 2) the present invention will be described.
Fig. 1 is the structural schematic diagram for implementing bilateral double-receiver array light curtain of the present invention.Fig. 2 is to implement bilateral pair of the present invention
Another structural schematic diagram of array acceptor light curtain.As shown in Figure 1 to Figure 2, bilateral double-receiver array light curtain, including frame knot
Structure 230 (solid space structure 20 is also a kind of frame structure), the left side of the frame structure 230 is provided with the first receiver
Array 14 (or 214) and the second array acceptor 15 (or 215), the right side of the frame structure 230 are provided with third reception
Machine array 16 (or 216) and the 4th array acceptor 17 (or 217), the right side inferior horn of the frame structure 230 are provided with first
Transmitter 6 (or 206), angle is provided with the second transmitter 7 (or 207), the frame structure on the right side of the frame structure 230
230 left side inferior horn is provided with third transmitter 8 (or 208), and angle is provided with the 4th transmitting on the left side of the frame structure 230
Machine 9 (or 209).First array acceptor 14 (or 214) and first transmitter 6 (or 206) form light transmitting-receiving pair
It answers, it is corresponding that second array acceptor 15 (or 215) and second transmitter 7 (or 207) form light transmitting-receiving, and described the
Three array acceptors 16 (or 216) are corresponding with the third transmitter 8 (or 208) formation light transmitting-receiving, the 4th receiver
Array 17 (or 217) is corresponding with the 4th transmitter 9 (or 209) formation light transmitting-receiving.
As shown in Figure 1, the frame structure is solid space structure 20, the solid space structure 20 includes front layer 4
(solid space structure 20 is divided into front 1 and median face 2 and below 3, solid space structure 20 from front to back with back layer 5
Including four corners, such as the solid space structure lower right corner 18 and the solid space structure lower left corner 19), a left side for the front layer 4
First array acceptor 14 is arranged in side, and second array acceptor 15 is arranged in the left side of the back layer 5, described
The third array acceptor 16 is arranged in the right side of front layer 4, and the 4th receiver is arranged in the right side of the back layer 5
First transmitter 6, the right side of the solid space structure 20 is arranged in the right side inferior horn of array 17, the solid space structure 20
Second transmitter 7 is arranged in angle on side, and the third transmitter 8, institute is arranged in the left side inferior horn of the solid space structure 20
It states angle on the left side of solid space structure 20 and the 4th transmitter 9 is set.First transmitter 6 is located at the front layer 4,
Second transmitter 7 is located at the back layer 5, and the third transmitter 8 is located at the front layer 4, the 4th transmitter 9
Positioned at the back layer 5.
First transmitter 6, first array acceptor 14, the third transmitter 8 and the third receiver
Array 16 is located in approximately the same plane, second transmitter 7, second array acceptor 15,9 and of the 4th transmitter
4th array acceptor 17 is located in approximately the same plane.
First array acceptor 14 (or 214) receives the lower right corner upper left of the first transmitter 6 (or 206) transmitting
Penetrate light 12 (or 212) covering lower left region, second array acceptor 15 (or 215) receive second transmitter 7 (or
207) light 13 (or 213) covering top left region is penetrated in the upper right corner lower-left emitted, and the third array acceptor 16 (or 216) connects
The lower left corner upper right for receiving the third transmitter 8 (or 208) transmitting penetrates light 11 (or 211) covering lower right area, and the described 4th
Light 10 (or 210) are penetrated in the upper left corner bottom right that array acceptor 17 (or 217) receives the 4th transmitter 9 (or 209) transmitting
Cover right regions.The lower left region and the right regions have light overlapping region, the top left region and the right side
Lower region has light overlapping region.
First array acceptor 214 matches wavelength (such as 650nm) shape by first with first transmitter 206
Receive and dispatch and correspond at light, second array acceptor 215 and second transmitter 207 pass through second match wavelength (such as
It 940nm) forms light transmitting-receiving to correspond to, the third array acceptor 216 matches wave by third with the third transmitter 208
Long (such as 650nm) forms light transmitting-receiving and corresponds to, and the 4th array acceptor 217 and the 4th transmitter 209 pass through the
Four matchings wavelength (such as 940nm) form light transmitting-receiving and correspond to.
First array acceptor 214 forms light by the first matching direction angle with first transmitter 206 and receives
Hair corresponds to, and second array acceptor 215 forms light transmitting-receiving by the second matching direction angle with second transmitter 207
Corresponding, the third array acceptor 216 forms light transmitting-receiving pair by third matching direction angle with the third transmitter 208
It answers, the 4th array acceptor 217 forms light transmitting-receiving pair by the 4th matching direction angle with the 4th transmitter 209
It answers.
First array acceptor 14 (or 214), second array acceptor 15 (or 215), the third receive
Machine array 16 (or 216) and the 4th array acceptor 17 (or 217) all have biserial close-packed configuration straggly before and after receiver,
First array acceptor 14 (or 214), second array acceptor 15 (or 215), the third array acceptor 16
(or 216) and the 4th array acceptor 17 (or 217) respectively have the sealing of independent optical path, or to be combined optical path close
Envelope, or carry out whole optical path sealing.
It is hereby stated that described above facilitate those skilled in the art understand that the invention, but not limit the present invention
The protection scope of creation.Any equivalent replacement described above, modification are improved without disengaging the invention substantive content
And/or delete numerous conform to the principle of simplicity and the implementation that carries out, each fall within the protection scope of the invention.
Claims (10)
1. bilateral double-receiver array light curtain, which is characterized in that including frame structure, the left side of the frame structure is provided with
First array acceptor and the second array acceptor, the right side of the frame structure are provided with third array acceptor and the 4th
Array acceptor, the right side inferior horn of the frame structure are provided with the first transmitter, and angle is arranged on the right side of the frame structure
There is the second transmitter, the left side inferior horn of the frame structure is provided with third transmitter, and angle is set on the left side of the frame structure
It is equipped with the 4th transmitter.
2. bilateral double-receiver array light curtain according to claim 1, which is characterized in that first array acceptor with
First transmitter forms light transmitting-receiving and corresponds to, and second array acceptor and second transmitter form light transmitting-receiving
Corresponding, it is corresponding that the third array acceptor and the third transmitter form light transmitting-receiving, the 4th array acceptor and
4th transmitter forms light transmitting-receiving and corresponds to.
3. bilateral double-receiver array light curtain according to claim 1, which is characterized in that the frame structure is three-dimensional empty
Between structure, the solid space structure includes front layer and back layer, and the left side setting described first of the front layer receives
Machine array, the left side of the back layer are arranged second array acceptor, the right side setting of the front layer described the
The 4th array acceptor, the right side of the solid space structure is arranged in the right side of three array acceptors, the back layer
First transmitter is arranged in inferior horn, and second transmitter, the solid is arranged in angle on the right side of the solid space structure
The third transmitter is arranged in the left side inferior horn of space structure, setting the 4th hair in angle on the left side of the solid space structure
Penetrate machine.
4. bilateral double-receiver array light curtain according to claim 3, which is characterized in that first transmitter is located at institute
Front layer is stated, second transmitter is located at the back layer, and the third transmitter is located at the front layer, the 4th hair
It penetrates machine and is located at the back layer.
5. bilateral double-receiver array light curtain according to claim 3, which is characterized in that first transmitter, described
First array acceptor, the third transmitter and the third array acceptor are located in approximately the same plane, second hair
Machine, second array acceptor, the 4th transmitter and the 4th array acceptor is penetrated to be located in approximately the same plane.
6. bilateral double-receiver array light curtain according to claim 1, which is characterized in that first array acceptor connects
Light covering lower left region is penetrated in the lower right corner upper left for receiving first transmitter transmitting, described in second array acceptor receives
Light covering top left region is penetrated in the upper right corner lower-left of second transmitter transmitting, and the third array acceptor receives the third hair
The lower left corner upper right for penetrating machine transmitting penetrates light covering lower right area, and the 4th array acceptor receives the 4th transmitter hair
Light covering right regions are penetrated in the upper left corner bottom right penetrated.
7. bilateral double-receiver array light curtain according to claim 6, which is characterized in that the lower left region and the right side
Upper region has light overlapping region, and the top left region and the lower right area have light overlapping region.
8. bilateral double-receiver array light curtain according to claim 1, which is characterized in that first array acceptor with
First transmitter forms light transmitting-receiving by the first matching wavelength and corresponds to, second array acceptor and second hair
It penetrates machine light transmitting-receiving is formed by the second matching wavelength and correspond to, the third array acceptor and the third transmitter pass through the
Three matching wavelength form light transmitting-receiving and correspond to, and the 4th array acceptor matches wavelength by the 4th with the 4th transmitter
Light transmitting-receiving is formed to correspond to.
9. bilateral double-receiver array light curtain according to claim 1, which is characterized in that first array acceptor with
First transmitter forms light transmitting-receiving by the first matching direction angle and corresponds to, second array acceptor and described second
Transmitter forms light transmitting-receiving by the second matching direction angle and corresponds to, and the third array acceptor and the third transmitter are logical
It crosses third matching direction angle and forms light transmitting-receiving correspondence, the 4th array acceptor and the 4th transmitter pass through the 4th
Light transmitting-receiving is formed with direction angle to correspond to.
10. bilateral double-receiver array light curtain according to claim 1, which is characterized in that first array acceptor,
Second array acceptor, the third array acceptor and the 4th array acceptor all have biserial before and after receiver
Close-packed configuration straggly, first array acceptor, second array acceptor, the third array acceptor and described
Respectively there is four array acceptors independent optical path to seal, and is perhaps combined optical path sealing or carries out whole optical path sealing.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811319671.9A CN109405653B (en) | 2018-11-07 | 2018-11-07 | Double-side double-receiver array light curtain |
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|---|---|---|---|
| CN201811319671.9A CN109405653B (en) | 2018-11-07 | 2018-11-07 | Double-side double-receiver array light curtain |
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| CN109405653A true CN109405653A (en) | 2019-03-01 |
| CN109405653B CN109405653B (en) | 2020-11-27 |
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| CN108759578A (en) * | 2018-07-11 | 2018-11-06 | 速得尔科技（北京）有限公司 | A kind of directive property optical path protecting device and anti-light interference light curtain electronics target system |
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2018
- 2018-11-07 CN CN201811319671.9A patent/CN109405653B/en active Active
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2068538C1 (en) * | 1992-06-30 | 1996-10-27 | Василий Иванович Яковлев | Device for recording of fire results at determination of bullet flight path coordinates |
| JPH11230699A (en) * | 1998-02-13 | 1999-08-27 | Babcock Hitachi Kk | Target arrival position measuring apparatus for bullet |
| US20060061039A1 (en) * | 2004-09-22 | 2006-03-23 | Francis Pan | Automatic score dartboard assembly |
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| Publication number | Publication date |
|---|---|
| CN109405653B (en) | 2020-11-27 |
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