JPS6171380A - Rotary-type signal receiver of tracer of light beam - Google Patents

Abstract

PURPOSE:To allow a scanning light beam to be irradiated constantly to an effective range of a corner cube, by judging an incident position of a beam of light irradiated to a signal-receiving sensor of signal receiver and rotating a signal-receiving apparatus driving motor in the required direction. CONSTITUTION:Among light-receiving elements 11-15 of signal-receiving sensor of signal-receiving apparatus of a moving body, outputs of the elements 11, 15 set FFs 20, 30 respectively and by the respective outputs of the element 14, 12 the FFs 20, 30 are reset. Further, by respective Q-output of the FF20 and Q-outputs of the FFs 20, 30 through an 'OR' circuit 30 control operations at switches S1-S5 through switching circuits 40, 50, etc. for controlling rotational direction as well as magnitude of rotation of a signal-receiving motor M and the signal-receiving apparatus is so rotated that a scanning light beam passing through a beam splitter located in the range of effective irradiation of a corner cube prism is received by elements 12-14. Consequently, the scanning light beam is allowed constantly to the corner cube and tracing of a moving body can be made in an extensive manner.

Description

[Detailed Description of the Invention] (a) Industrial Application Field The present invention relates to a tracking device for a moving object using a light beam, and is particularly applicable when the moving object performs rotational motion or when the moving object moves over a wide range. The present invention relates to a rotary receiver of an optical beam tracking device suitable for various cases.

(B) Prior Art Conventionally, in a moving object tracking device using a light beam, a corner cube of a receiver, a beam splitter, a condensing lens,
Each light receiving detector was individually mounted on the moving object.

For example, see the specification of Japanese Patent Application No. 59-242673.

Therefore, for example, when tracking a moving object by scanning a light beam from the side, the scanned light beam may be placed on a corner cube mirror in a place where the direction of the moving object changes significantly when rotating the moving object. A problem arises in that it is not possible to irradiate the area within the effective range of the object, making tracking impossible. Similarly, if you move the moving object over a wide angle range,
This means that the light beam is scanning outside the effective range of the corner cube. Therefore, a problem arises in that the range of movement of the moving body is restricted.

(C) Purpose This invention provides a rotating receiver for a light beam tracking device that allows a scanning light beam to always illuminate the effective range of a corner cube and to track a moving object over a wide range. The purpose is

(D) Structure The rotary receiver of the optical beam tracking device according to the present invention is characterized by a corner cube, a beam splitter, a condensing lens, and a receiving sensor being appropriately disposed within a predetermined frame to receive signals. The present invention further comprises an incident direction determining means for receiving a signal from the receiving sensor and rotating the receiver in an appropriate direction using a motor.

(Po) Embodiment FIG. 1 is an explanatory diagram of the configuration of an embodiment of a rotary receiver of an optical beam tracking device according to the present invention, (a) is a front view thereof, and (b) is a (a) )0) A cross-sectional view taken along line A-A is shown.

In the figure, the symbol (■) indicates a receiver, which is constructed by housing and holding a corner cube prism 7, a beam splitter 8, a condensing lens 9, and a receiving sensor 10 in a frame 5, respectively.

Specifically, a DC motor 3 is fixed to a base plate 2 (moving body) with a base 4, and an output shaft 3 of this DC motor 3
A rotary receiver is formed by fixing the receiver 1 to the receiver 1 .

More specifically, a DC motor 3 is vertically installed on the base plate 2, and with the output shaft 31 of the DC motor 3 protruding, the top plate 41 of the base 4 is parallel to the base plate 2 at a predetermined distance. At the same time, hanging walls 42 are fixed to the ends of two opposing sides of the top plate 41 in a direction perpendicular thereto, and these hanging walls 42 are fixed to the base plate 2. A base 4 is formed by the top plate 41 and the hanging wall 42.

A rectangular image-shaped main body of the frame 5 is erected at the tip of the bottom plate 51 of the frame 5, and a predetermined portion of the bottom plate 51 is fixed to the output shaft 31. A dustproof glass 6 is disposed in a window 52 formed by opening the lower half of the front plate of the frame 5 main body.
A corner cube prism 7 is disposed in a window 53 formed by a circular opening near the lower end of the rear plate of the frame 5 so as to protrude rearward.

A mounting member 54 fixed to the inner surface of the lower end of the front plate of the frame 5 main body
A beam splitter 8 with a predetermined angle is fixed to a mounting member 55 fixed to the inner surface near the center of the rear plate of the frame body 5 body, and a beam splitter 8 with a predetermined angle is fixed to the mounting member 55 fixed to the inner surface near the center of the rear plate of the frame body 5 body. The condenser lens 9 is fixed to the mounting member 55 and the mounting member 56 fixed to the inner surface of the front plate opposite thereto, and the beam splitter 8
It is disposed above and parallel to the heel plate 2. moreover,
A receiving sensor 10 is fixed to the inner surface of the upper plate of the frame 5 main body, which is the focal point of the condensing lens 9. The receiving sensor 10 is formed by arranging a plurality of light receiving elements in parallel, and here five light receiving elements 11 to 15 (not shown) are employed. For example, the light receiving element 1 of the receiving sensor 10
The area from 2 to 14 is the effective range of the corner cube prism 7, and the receiver 1 is set not to rotate even if the optical beam enters this range.

The incident direction determining means shown in FIG. 2 will be described as an example. In FIG. 2, the same parts as in FIG. 1 are given the same reference numerals.

Light receiving element 11.12.13.14.1 of receiving sensor 10
The output signals of 5 are sent to individual sensor circuits 11a and 1, respectively.
2a, 13a, 14a, and 15a, and the output signal of each sensor circuit is provided to a communication circuit 70 via an OR gate circuit 60, respectively. The set terminal S of the flip-flop 20 is supplied with an output signal from the sensor circuit 11a, and the reset terminal R is supplied with an output signal from the sensor circuit 14a. A signal from the output terminal Q of the flip-flop 20 is applied to a switch circuit 40 and an OR gate circuit 80, respectively. Also flip flop 30
The output signal of the sensor circuit 12a is connected to the reset terminal R of the
The output signal of the sensor circuit 15a is given to the set product 1 child S, and the signal from the output terminal Q of the flip-flop 30 is sent to the switch circuit 50 via the OR gate circuit 80.
given to. The relay coils 40a and 50a are energized by the operation signals of the switch circuits 40 and 50, and the switch groups 81 to S5 are actuated to instruct the direction of rotation of the DC motor 3. However, the switch circuit 40
is not operating, switch S1,
The contacts a1 and a2 of S2 are in contact with the bl and b2 sides of terminal S2, and the contacts of switches S3 and S4 are
It is assumed that a3 and a4 are set to maintain contact with the terminals C3 and C4, and are interlocked and connected to the switch group S1 and S3 to S4. Next, the operation of the rotary rotary receiver 1 of the optical beam tracking device of the above-described embodiment will be explained. For example, when a light beam enters the light receiving element 11 outside the effective range of the corner cube prism 7, an input signal is given from the light receiving element 1 to the sensor ν circuit 11a.
Sensor times + Il? 'IIIGH' from r11 a to switch terminal S of flip-flop 20
A signal is input from the terminal Q, and a signal is input from the output terminal Q.
The switch circuit 40 is operated by the signal of T(lG HJ) and the relay coil 40a is activated.
At the same time, the excitation force θ+M
By applying the H and r output signals to the switch circuit 50 via the OR gate circuit 80, the relay coil 50a is activated. In other words, switch S5 is turned on by relay coil 50a.
When switch S1 and contact pieces a1 and a2 are brought into contact with terminals C1 and C2 by relay coil 40a, contact pieces a3 and a4 of switches S3 and S4 are connected to terminal b3 and
By touching the b4 side, current flows from the power supply Vcc to the DC mode, and the receiver 1 is rotated in the set direction. and receive t
Due to the rotation of a 1, the light beam becomes Nacube prism 7
If it becomes incident on the receiver 14 which is within the effective range of
Since the output signal 'HIGHJ' is input to the terminal R of the flip-flop 20 through the sensor circuit 14a of the light receiving element 14, the signal rLOWJ is transmitted from the output terminal Q to the circuit 4.
0, the relay controller 40a is deenergized and the rLOW output signal is applied to the OR gate circuit 8.
0 to the switch path 50, the relay coil 50a is released and the switch S5 is brought into a non-conducting state, thereby stopping the flow of current to the DC motor 3. As a result, the rotation of the receiver ta 1 is stopped. Note that the contact pieces a1 and a2 of the switches S1 and S2 are returned to the end b2 side, and the contact pieces a3 and a4 of the switches S3 and S4 are returned to the terminal C3 and 04 sides, respectively. G)] Also, if the light beam enters the light receiving cable 15 outside the effective range of the corner cube prism 7, the receiving
When an input signal is applied from the sensor circuit 15 to the sensor circuit 15a, and a HIGH signal is input from the sensor circuit 15a to the terminal S of the flip-flop 30, the output terminal Q is kararHI'
The GHJ signal is applied to the switch circuit 50 via the OR gate (η circuit 80), which excites the relay coil 50a and makes the switch S5 conductive.
In this case, current is applied to the DC motor 3 from the power supply Vcc.

(reception) ~ Here, since the switch circuit 40 is not operating, the contact pieces al, a of the mass isochi St, S2
2 is on the terminal b1, b2 side, 704: Switch S3
, S4 contacts a3 and a4 are in contact with terminals C3 and C4.
This means that there is one touch. That is, the DC motor 3 is
Since the rotation is in the opposite direction to the ξ predicate, the receiver 1 also rotates in the opposite direction to the above I) predicate. Then, when the field of the receiver 1 changes (by rotation, the light beam comes out to be incident on the light receiving element 12 within the effective range of the corner cube prism element F7), the light receiving element 12
Since the output signal 'HI i' is input to the reset terminal R of the flip-flop 30 via the sensor circuit 12a, the output terminal Q・' LOW
The signal of J is passed through the OR gate circuit 80 to the isochi circuit 50.
When the current is applied to the DC motor 3, the excitation of the relay rail 50a is canceled and the switch S5 is placed in the non-circular state. stop it. This allows receiver 1
Same sex, stop and end.

Furthermore, when a light beam is incident on the light receiving element 13 within the effective range of the corner cube prism 7, the output signal from the element 13 is given to the OR gate circuit 60 via the sensor circuit 13a, and then input to the communication circuit. . In addition, DC motor 3
Since no current flows through the receiver 1, it does not rotate the receiver 1.

, the light beam is incident on the light receiving element 12.14 which is the effective range 1 of the corner cube prism 7, and 'H' is applied to the reset terminal □ of the flip-flop 20.
IGHJ signal is input and from J terminal Q to r LOW OW
The r switch circuits 40 and 50 to which the J signal is output do not operate.

2. In the above embodiment, the number of light receiving elements of the receiving sensor 10 is 5 (IM), but the present invention is not limited to this. For example, the number of light receiving elements may be increased to correct the incident position of the light beam. By obtaining this value, it becomes possible to rotate the receiver 1 in the scanning direction of the light beam with higher precision than described above.

(F1) According to this invention, the incident position of the light beam incident on the receiving sensor of the receiver is determined by the incident direction determining means, and the receiver is rotated in an appropriate direction by the motor.゛The optical beam scanned by C1 always enters the corner cuf within the effective range.

Therefore, it is particularly suitable for use in a light beam tracking device that tracks a moving object that rotates at a rotational speed of 'JJj' or a moving object that moves over a wide angle range.

[Brief explanation of the drawing]

FIG. 1 is a configuration explanatory diagram showing one embodiment of a rotary receiver of a system filtering beam tracking device according to the present invention, and FIG. 2 is a block diagram showing the configuration of a folding means for each direction of incidence. 1... Receiver, 3... DC motor, 5... Frame,
6... Dust-proof glass, 7... Corner cube prism, 8... Beam splitter, 9... Condensing lens, 1
0...Reception sensor.

Claims (1)

[Claims] (1) A corner cube that receives a light beam irradiated from a light beam generator and scanned by a scanning device and returns a reflected light beam parallel to the incident direction of the light beam, and a part of the incident light beam. A beam splitter that changes the optical path of the beam, a condensing lens that condenses the light beam whose optical path has been changed, and a reception sensor that is placed at the focal point of the condensed light beam are housed in a frame and received. an incident direction determination means determines the incident direction of the light beam based on the irradiation position of the receiving sensor irradiated with the light beam, and rotates the receiver in an appropriate direction with a motor. A rotary receiver for a light beam tracking device characterized by: