CN105698609A - Light curtain electronic target system and installation method thereof - Google Patents
Light curtain electronic target system and installation method thereof Download PDFInfo
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- CN105698609A CN105698609A CN201610134749.4A CN201610134749A CN105698609A CN 105698609 A CN105698609 A CN 105698609A CN 201610134749 A CN201610134749 A CN 201610134749A CN 105698609 A CN105698609 A CN 105698609A
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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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Abstract
The invention discloses a light curtain electronic target system. The light curtain electronic target system comprises two or more transmitters and two or more receiver arrays; the transmitters and the receiver arrays are connected as a rectangle for arranging a rectangular light curtain inside; the transmitters and the receiver arrays form a corresponding relation one to one; the transmitters are arranged on at least two vertexes of the rectangle; receivers forming the receiver arrays are distributed along the edges of the rectangle; transmitting angles of the transmitters cover the inner plane of the rectangle; light rays emitted by the transmitters form virtual fan-shaped light curtain arcs; and the receivers are perpendicular to tangent lines of intersecting points between the light rays passing through setting points of the receivers and the virtual fan-shaped light curtain arcs. The light curtain electronic target system, proposed by the invention, gives consideration to high precision of fan-shaped intersecting light curtains for impact point detection and area effectiveness of perpendicular intersecting light curtains, and is simple in structure and convenient for installation and maintenance.
Description
Technical field
The present invention relates to shooting class of electronic devices and systems technology field, particularly a kind of light curtain electric target system and installation method thereof。
Background technology
Shoot class (such as physical culture gunnery meeting) electronic equipment light curtain electric target at present and be generally adopted following two structure: fan-shaped cross light curtain structure and square crossing light curtain structure。Fan-shaped cross light curtain structure usually utilizes sector optical curtain that transmitter launched by launch point and the array acceptor (or title receiving array) that the receiver that far-end is arranged on fan-shaped arc form to detect point of impact position, as shown in Figure 1, a kind of fan-shaped cross light curtain structure, including the transmitter 1 being correspondingly arranged and receiving array 1 (the sector optical curtain camber line setting launching light formation of each receiver edge of composition receiving array 1 transmitter 1 as shown in Figure 1, and each receiver is perpendicular to the tangent line of its set-point), (each receiver of composition receiving array 2 is arranged along the sector optical curtain camber line launching light formation of transmitter 2 for the transmitter 2 being correspondingly arranged and receiving array 2, and each receiver is perpendicular to the tangent line of its set-point) and (each receiver of composition receiving array 3 is arranged along the sector optical curtain camber line that light formed of launching of transmitter 2 to be correspondingly arranged the transmitter 3 of correspondence and receiving array 3, and each receiver is perpendicular to the tangent line of its set-point)。Generally, fan-shaped cross light curtain structure only needs two groups of transmitters being correspondingly arranged respectively and receiving array can realize point of impact position detection (namely providing the length value under such as polar coordinate system and angle value)。Three groups of transmitters being correspondingly arranged respectively and the preferably fan-shaped cross light curtain structure of receiving array composition as shown in Figure 1 can realize more accurate detection or offer other Function detection compatible。The advantage of fan-shaped cross light curtain structure is the power of test that can realize higher precision when identical array acceptor density, its shortcoming is that effective area of detection is less, only it is placed only in the border circular areas (dashed circle region as shown in Figure 1) that light curtain is intersected, in other words it is, if it is intended to realize the area of detection that fan-shaped cross light curtain structure is identical with square crossing light curtain structure covering, then fan-shaped cross light curtain structure needs bigger target drone structure。Square crossing light curtain structure usually utilizes the square crossing light curtain that the transmitter array that transmitter form launched by launch point and the array acceptor reception light that the receiver arranged with transmitter one_to_one corresponding form to detect point of impact position, as in figure 2 it is shown, a kind of square crossing light curtain structure includes horizontally disposed transmitter array one to one 1 and array acceptor 1 and the transmitter array one to one 2 being arranged in vertical and array acceptor 2 (namely providing coordinate figure horizontally and vertically under such as plane right-angle coordinate)。The advantage of square crossing light curtain structure is able to provide the effective area of detection about the same with target drone structure, its shortcoming is the distance (the black round dot in square crossing light curtain as shown in Figure 2 is bullet shooting to shut out the light signal through light curtain) that accuracy of detection is limited between receiver, and under identical array acceptor density conditions, its precision is lower than sector cross light curtain structure。
Summary of the invention
The present invention is directed to the defect or deficiency that exist in prior art, a kind of light curtain electric target system is provided, only need the array acceptor that two or more transmitter and two or more are correspondingly arranged respectively with each transmitter, and by it according to ad hoc fashion spread configuration, the area efficiency of high accuracy and the square crossing light curtain having the sector intersection light curtain of point of impact detection concurrently namely can be realized。The present invention also provides for a kind of light curtain electric target system installation method。
Technical scheme is as follows:
Light curtain electric target system, it is characterized in that, including two or more transmitters, two or more array acceptors, described transmitter and receiver array connects into for the interior rectangle setting rectangle light curtain, described transmitter and described array acceptor form man-to-man corresponding relation, the at least two summit of rectangle is respectively provided with described transmitter, form the receiver of described array acceptor to be distributed along the limit of described rectangle, the angle of departure of described transmitter covers the inner plane of described rectangle, the light that described transmitter is launched forms virtual sector optical curtain camber line, described receiver is perpendicular to the intersection point tangent line that the light through this receiver set-point intersects with described virtual sector optical curtain camber line。
Described transmitter is two, adjacent two summits of rectangle are respectively provided with described transmitter, described array acceptor is two, and an array acceptor is arranged on two limits relative with the rectangle summit arranging described transmitter in described rectangle, and the angle of departure of described transmitter is 90 °。
Each transmitter and receiver array to forming one-to-one correspondence lays respectively in Different Plane。
Interval between described Different Plane is 5mm-15mm；Plate washer is set between the transmitter of Different Plane。
Described transmitter is four, four summits of rectangle are respectively provided with described transmitter, described array acceptor is four, and an array acceptor is arranged on a limit relative with the rectangle summit arranging described transmitter in described rectangle, and the angle of departure of described transmitter is 45 °。
Described receiver includes at least one reception diode, and the spacing between described adjacent reception diode is 3mm-4mm。
Described transmitter and receiver array is arranged on rectangular target frame, and the area coverage of described rectangular target frame is more than the effective area of detection of light curtain。
Light curtain electric target system installation method, it is characterized in that, two or more transmitters and two or more array acceptors are connected into for the interior rectangle setting rectangle light curtain, and transmitter and array acceptor are formed man-to-man corresponding relation, the at least two summit of rectangle is respectively provided with described transmitter, and the receiver of the described array acceptor of composition is distributed along the limit of described rectangle, the angle of departure of described transmitter is covered the inner plane of described rectangle, the light that described transmitter is launched forms virtual sector optical curtain camber line, and described receiver is perpendicular to the intersection point tangent line that the light through this receiver set-point intersects with described virtual sector optical curtain camber line。
The transmitting angle arranging described transmitter is 45 °-90 °；Being separately positioned in Different Plane by each transmitter and receiver array to forming one-to-one correspondence, arranging interval between each plane is 5mm-15mm, and is arranging plate washer between the transmitter of Different Plane。
Arranging described receiver and include at least one reception diode, arranging the spacing between described adjacent reception diode is 3mm-4mm；Described transmitter and receiver array is arranged on rectangular target frame, the area coverage of described rectangular target frame is set more than the effective area of detection of light curtain。
The technique effect of the present invention is as follows: the light curtain electric target system that the present invention proposes, two or more transmitters and two or more and transmitter are only needed to form the array acceptor of one-to-one correspondence, and by it according to ad hoc fashion spread configuration, the area efficiency of high accuracy and the square crossing light curtain having the sector intersection light curtain of point of impact detection concurrently can be realized, namely transmitter and arrangement array acceptor are set by rational ad hoc fashion, can realize under the premise of effective area of detection of the square crossing light curtain of point of impact detection, obtain the high accuracy effect of sector intersection light curtain。
The invention have the characteristics that: 1. have the fan-shaped point of impact intersecting light curtain concurrently and detect high accuracy。2. have the point of impact area of detection effectiveness of square crossing light curtain concurrently。3. the array acceptor of each pair of transmitter and corresponding setting is separate。4. the more efficient fruit of accuracy of detection near light curtain electric target target center position is better。5. system structure is simple, installs, easy to maintenance。
Accompanying drawing explanation
Fig. 1 is a kind of preferred structure schematic diagram of prior art sector cross light curtain structure。
Fig. 2 is the structural representation of prior art square crossing light curtain。
Fig. 3 is a kind of preferred structure schematic diagram of light curtain electric target system of the present invention。
Fig. 4 is the side view after Fig. 3 arranges plate washer。
Fig. 5 is the another kind of preferred structure schematic diagram of light curtain electric target system of the present invention。
Accompanying drawing labelling lists as follows: 1-transmitter (A)；2-array acceptor (A)；3-transmitter (B)；4-array acceptor (B)；The virtual sector optical curtain camber line (A) of 5-；The virtual sector optical curtain camber line (B) of 6-；7-plate washer；8-shoots face；9-transmitter (C)；10-array acceptor (C)；11-transmitter (D)；12-array acceptor (D)；The virtual sector optical curtain camber line (C) of 13-；The virtual sector optical curtain camber line (D) of 14-。
Detailed description of the invention
Below in conjunction with accompanying drawing (Fig. 3-Fig. 5), the present invention will be described。
Shown in Fig. 3 to Fig. 5, the present invention relates to a kind of light curtain electric target system, including two or more transmitters (transmitter 1 and transmitter 3) in such as Fig. 3, (array acceptor 4 of corresponding transmitter 3 in such as Fig. 3, each receiver is distributed in top and the right to two or more array acceptors；The array acceptor 2 of corresponding transmitter 1, each receiver is distributed in top and the left side), transmitter and receiver array connects into for the interior rectangle (the heavy line square frame in Fig. 3 and Fig. 5) setting rectangle light curtain (dashed rectangle in Fig. 3 and Fig. 5), transmitter and array acceptor form man-to-man corresponding relation, the at least two summit of rectangle is respectively provided with transmitter, the receiver forming above-mentioned array acceptor is distributed along the limit of rectangle respectively, the transmitting angle of transmitter covers the inner plane of rectangle, the light that transmitter is launched forms virtual sector optical curtain camber line (virtual sector optical curtain camber line 5 and virtual sector optical curtain camber line 6) in such as Fig. 3, the receiver of composition array acceptor is perpendicular to the intersection point tangent line that the virtual sector optical curtain camber line (virtual sector optical curtain camber line 5 or virtual sector optical curtain camber line 6) that the light through this receiver set-point formed intersects with this light。
The transmitting angle that preferably can arrange each transmitter (i.e. generating laser, LASER Light Source) ranges for 45 °-90 °；Being separately positioned in Different Plane by each transmitter and receiver array to forming man-to-man corresponding relation, arranging interval between each plane is 5mm-15mm。
Fig. 3 is a kind of preferred structure schematic diagram of light curtain electric target system of the present invention。As shown in Figure 3, including transmitter 1, transmitter 3, array acceptor 2 and array acceptor 4, transmitter 1 and transmitter 3 and array acceptor 2 and array acceptor 4 connect into for the interior rectangle setting rectangle light curtain, above-mentioned transmitter and array acceptor form man-to-man corresponding relation, namely transmitter 1 and array acceptor 2 form corresponding relation, transmitter 3 and array acceptor 4 form corresponding relation, adjacent two summits of rectangle are respectively provided with transmitter 1 and transmitter 3, the receiver (each receiver can include at least one reception diode) of composition array acceptor 2 and array acceptor 4 is distributed along the limit of rectangle respectively, the each receiver forming array acceptor 2 in the present embodiment is distributed in top and the left side of rectangle, each receiver of composition array acceptor 4 is distributed in top and the right of rectangle, the transmitting angle of transmitter 1 and transmitter 3 is 90 ° and covers the inner plane of rectangle, the light that transmitter 1 and transmitter 3 are launched is made to form virtual sector optical curtain camber line 5 and virtual sector optical curtain camber line 6 respectively, composition array acceptor 2 and the receiver of array acceptor 4 are perpendicular to the intersection point tangent line that the virtual sector optical curtain camber line (virtual sector optical curtain camber line 5 or virtual sector optical curtain camber line 6) that the light through this receiver set-point formed intersects with this light。Preferably, spacing between each receiver and each receiver of composition array acceptor 4 of composition array acceptor 2 could be arranged to 3mm-4mm (when each receiver of each receiver or composition array acceptor 4 that form array acceptor 2 only includes a reception diode, namely the spacing between each reception diode could be arranged to 3mm-4mm)；Can require to arrange this spacing value according to the point of impact accuracy of detection in practical application, be not limited to above-mentioned span。The light curtain electric target system that the present invention proposes, only need two or more transmitters and two or more array acceptors being correspondingly arranged respectively with each transmitter, transmitter and arrangement array acceptor are set by the ad hoc fashion in such as the present embodiment, the area efficiency of high accuracy and the square crossing light curtain having the sector intersection light curtain of point of impact detection concurrently can be realized, namely can realize under the premise of effective area of detection of the square crossing light curtain of point of impact detection, obtain the high accuracy effect of sector intersection light curtain, add up according to practical application, accuracy of detection can be doubled by the light curtain electric target system that the present invention proposes on the basis of identical effective area of detection, in other words detection error can be decreased to half；In addition, for shooting class (such as physical culture gunnery meeting) project, accuracy of detection near the target center position of target drone is even more important, the light curtain electric target system that the present invention proposes, owing to its target center position is set to be positioned at the half place of each receiver (i.e. each reception diode) receiving range, therefore it is the precision better coverage of more efficient fruit of point of impact detection near its target center position, is very suitable for shooting intermediate item statistics score application。
The light curtain electric target system that the present invention proposes, can transmitter 1 and array acceptor 2 be arranged in same plane (in the shooting face in Fig. 4 8), and by transmitter 3 and array acceptor 4 in another plane away from shooting face 8 certain intervals, its side view is as shown in Figure 4, the scope at this interval could be arranged to 5mm-15mm, the light launched to block transmitter 1 exposes to array acceptor 4, and the light simultaneously blocking transmitter 3 transmitting exposes to array acceptor 2；And plate washer 7 can be set between transmitter 1 and transmitter 3, to further enhance the effect blocking light。
Fig. 5 is the another kind of preferred structure schematic diagram of light curtain electric target system of the present invention。As it is shown in figure 5, include transmitter 1, transmitter 3, transmitter 9, transmitter 11, array acceptor 2, array acceptor 4, array acceptor 10 and array acceptor 12, transmitter 1, transmitter 3, transmitter 9 and transmitter 11 and array acceptor 2, array acceptor 4, array acceptor 10 and array acceptor 12 connect into for the interior rectangle setting rectangle light curtain, above-mentioned transmitter and array acceptor form man-to-man corresponding relation, namely transmitter 1 and array acceptor 2 form corresponding relation, transmitter 3 and array acceptor 4 form corresponding relation, transmitter 9 and array acceptor 10 form corresponding relation, transmitter 11 and array acceptor 12 form corresponding relation, are respectively provided with transmitter 1 on four summits of rectangle, transmitter 3, transmitter 9 and transmitter 11, form array acceptor 2, array acceptor 4, the receiver of array acceptor 10 and array acceptor 12 is distributed along the limit of rectangle respectively (each receiver can include at least one reception diode), the each receiver forming array acceptor 2 in the present embodiment is distributed in the top of rectangle, each receiver of composition array acceptor 4 is distributed in the left side of rectangle, each receiver of composition array acceptor 10 is distributed in the following of rectangle, each receiver of composition array acceptor 12 is distributed in the right of rectangle, transmitter 1, transmitter 3, the transmitting angle of transmitter 9 and transmitter 11 is 45 ° and covers the inner plane of rectangle so that transmitter 1, the light that transmitter 3 transmitter 9 and transmitter 11 are launched forms virtual sector optical curtain camber line 5 respectively, virtual sector optical curtain camber line 6, virtual sector optical curtain camber line 13 and virtual sector optical curtain camber line 14, form array acceptor 2, array acceptor 4, the receiver of array acceptor 10 and array acceptor 12 is perpendicular to the intersection point tangent line that virtual sector optical curtain camber line that the light through this receiver set-point formed (virtual sector optical curtain camber line 5 or virtual sector optical curtain camber line 6 or virtual sector optical curtain camber line 13 or virtual sector optical curtain camber line 14) intersects with this light。Preferably, form the spacing between each receiver and each receiver of composition array acceptor 12 of each receiver of array acceptor 2, each receiver of composition array acceptor 4, composition array acceptor 10 and could be arranged to 3mm-4mm (when each receiver of each receiver or each receiver of composition array acceptor 4 or each receiver of composition array acceptor 10 or composition array acceptor 12 that form array acceptor 2 only includes a reception diode, namely the spacing between each reception diode could be arranged to 3mm-4mm)；Can require to arrange this spacing value according to the point of impact accuracy of detection in practical application, be not limited to above-mentioned span。
The transmitter and receiver that the light curtain electric target system that the present invention relates to adopts all can be arranged on rectangular target frame and arrange the area coverage of this rectangular target frame more than the effective area of detection of light curtain to avoid the interference between each transmitter, it is specifically, rectangular target frame can be set according to rectangle (namely such as heavy line square frame in Fig. 3 and Fig. 5) as shown in Figure 3 and Figure 5, and the transmitter and receiver array of employing is arranged on this rectangular target frame according to the setting of above-mentioned ad hoc fashion, and ensure that the area coverage (namely such as heavy line square frame in Fig. 3 and Fig. 5) of now rectangular target frame is more than the effective area of detection of now light curtain (namely such as dashed rectangle in Fig. 3 and Fig. 5), both back gauges such as can be set and be spaced apart 5cm-15cm。
The invention still further relates to the installation method of light curtain electric target system, two or more transmitters and two or more array acceptors are connected into for the interior rectangle setting rectangle light curtain, and transmitter and array acceptor are formed man-to-man corresponding relation, the at least two summit of rectangle is respectively provided with transmitter, and the receiver of composition array acceptor is distributed along the limit of rectangle, the angle of departure of transmitter is covered the inner plane of rectangle, the light that transmitter is launched forms virtual sector optical curtain camber line, and receiver is perpendicular to the intersection point tangent line that the light through this receiver set-point intersects with virtual sector optical curtain camber line。
It is specifically, first can design virtual sector in advance and intersect the light line structure (intending forming virtual sector optical curtain camber line) of light curtain so that it is area of detection reaches the area of detection of square crossing light curtain preset and marks the edge (heavy line square frame as shown in Figure 3 and Figure 5) of this square crossing light curtain rectangle and make it slightly larger than effective area of detection (dashed rectangle as shown in Figure 3 and Figure 5)；The summit of rectangle is placed transmitter respectively, in order to effectively utilize the transmitting angle of transmitter (can be generating laser, LASER Light Source), the transmitting angle that can arrange each transmitter ranges for 45 °-90 °, such as cover the inner plane (as shown in Figure 3) of rectangle with 2 the 90 ° transmitters launching angle, or cover the inner plane (as shown in Figure 5) of rectangle with 4 the 45 ° transmitters launching angle；Now the light of the virtual sector intersection light curtain that the center of circle is positioned at each transmitter center all forms intersection point one by one with the edge of rectangle, transmitter and array acceptor are formed man-to-man corresponding relation, the receiver forming each array acceptor is arranged on above-mentioned light with rectangular edges along the position of intersecting point place formed, and the tangent line that each receiver is perpendicular to the intersection point that the light through this receiver set-point intersects with virtual sector optical curtain camber line arranges the light launched with receiver/transmitter, owing to each receiver is arranged in each directions of rays of virtual sector intersection light curtain respectively, hence in so that its accuracy of detection substantially can be identical with the accuracy of detection of fan-shaped cross light curtain structure, simultaneously because each receiver may be contained within the edge of rectangular configuration, rather than on virtual sector optical curtain camber line, hence in so that its light curtain physical dimension is greatly reduced than sector intersection light curtain, substantially can be identical with square crossing light curtain physical dimension。The structural representation of the light curtain electric target system after installation is referred to Fig. 3 and Fig. 5。
The light curtain electric target system installation method that the present invention proposes, can each transmitter and receiver array to forming man-to-man corresponding relation be separately positioned in Different Plane, arranging interval between each plane is 5mm-15mm, and is arranging plate washer between the transmitter of Different Plane；Arranging receiver and include at least one reception diode, the spacing between adjacent reception diode is 3mm-4mm；In addition, in order to avoid the interference between relative transmitter, transmitter and receiver array can also be arranged on the rectangular target frame more slightly larger than effective area of detection, it is arranged on rectangular target frame by transmitter and receiver installation method as described above, and the area coverage of rectangular target frame is set more than the effective area of detection of light curtain, for instance both back gauges are set and are spaced apart 5cm-15cm。
It is hereby stated that, described above contribute to skilled artisan understands that the invention, but and the protection domain of unrestricted the invention。Any enforcement that equivalent replacement described above, modification are improved and/or delete numerous conforming to the principle of simplicity and carry out without departing from the invention flesh and blood, each falls within the protection domain of the invention。
Claims (10)
1. light curtain electric target system, it is characterized in that, including two or more transmitters, two or more array acceptors, described transmitter and receiver array connects into for the interior rectangle setting rectangle light curtain, described transmitter and described array acceptor form man-to-man corresponding relation, the at least two summit of rectangle is respectively provided with described transmitter, form the receiver of described array acceptor to be distributed along the limit of described rectangle, the angle of departure of described transmitter covers the inner plane of described rectangle, the light that described transmitter is launched forms virtual sector optical curtain camber line, described receiver is perpendicular to the intersection point tangent line that the light through this receiver set-point intersects with described virtual sector optical curtain camber line。
2. light curtain electric target system according to claim 1, it is characterized in that, described transmitter is two, adjacent two summits of rectangle are respectively provided with described transmitter, described array acceptor is two, an array acceptor is arranged on two limits relative with the rectangle summit arranging described transmitter in described rectangle, and the angle of departure of described transmitter is 90 °。
3. light curtain electric target system according to claim 2, it is characterised in that each transmitter and receiver array to forming one-to-one correspondence lays respectively in Different Plane。
4. light curtain electric target system according to claim 3, it is characterised in that the interval between described Different Plane is 5mm-15mm；Plate washer is set between the transmitter of Different Plane。
5. light curtain electric target system according to claim 1, it is characterized in that, described transmitter is four, four summits of rectangle are respectively provided with described transmitter, described array acceptor is four, an array acceptor is arranged on a limit relative with the rectangle summit arranging described transmitter in described rectangle, and the angle of departure of described transmitter is 45 °。
6. according to the light curtain electric target system one of claim 1 to 5 Suo Shu, it is characterised in that described receiver includes at least one reception diode, and the spacing between described adjacent reception diode is 3mm-4mm。
7., according to the light curtain electric target system one of claim 1 to 5 Suo Shu, it is characterised in that described transmitter and receiver array is arranged on rectangular target frame, the area coverage of described rectangular target frame is more than the effective area of detection of light curtain。
8. light curtain electric target system installation method, it is characterized in that, two or more transmitters and two or more array acceptors are connected into for the interior rectangle setting rectangle light curtain, and transmitter and array acceptor are formed man-to-man corresponding relation, the at least two summit of rectangle is respectively provided with described transmitter, and the receiver of the described array acceptor of composition is distributed along the limit of described rectangle, the angle of departure of described transmitter is covered the inner plane of described rectangle, the light that described transmitter is launched forms virtual sector optical curtain camber line, and described receiver is perpendicular to the intersection point tangent line that the light through this receiver set-point intersects with described virtual sector optical curtain camber line。
9. light curtain electric target system installation method according to claim 8, it is characterised in that the transmitting angle arranging described transmitter is 45 °-90 °；Being separately positioned in Different Plane by each transmitter and receiver array to forming one-to-one correspondence, arranging interval between each plane is 5mm-15mm, and is arranging plate washer between the transmitter of Different Plane。
10. light curtain electric target system installation method according to claim 8 or claim 9, it is characterised in that arrange described receiver and include at least one reception diode, arranging the spacing between described adjacent reception diode is 3mm-4mm；Described transmitter and receiver array is arranged on rectangular target frame, the area coverage of described rectangular target frame is set more than the effective area of detection of light curtain。
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| CN201610134749.4A CN105698609B (en) | 2016-03-10 | 2016-03-10 | Light curtain electronics target system and its installation method |
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Also Published As
| Publication number | Publication date |
|---|---|
| CN105698609B (en) | 2018-02-06 |
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