JPH06260004A - Device for controlling irradiation direction of spotlight - Google Patents

Abstract

PURPOSE:To obtain a device for making a spotlight automatically track a moving article. CONSTITUTION:A moving article 11 is made to have a transmitter 16 for sending an ultrasonic wave, and four receiving sensors X1, X2, Y1, Y2 for receiving the ultrasonic wave are provided in a spotlight main body at four positions in the X-axis direction and the Y-axis direction around of an axis of a spotlight irradiation port. Furthermore, a position detection converting circuit for controlling the direction of the spotlight on the basis of the output of these sensors is provided to make the spotlight always track the moving article 11 so that the irradiation direction of the spotlight can point a position of the moving article 11. A device for controlling the irradiation direction of the spotlight, which can apply the spotlight to the moving article 11 effectively and accurately, and furthermore, which can save the labor of lighting sufficiently, is thereby obtained.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a spotlight irradiation direction control device for effectively irradiating a spotlight on a moving person or moving object on a stage such as a theater or a wedding hall.

[0002]

2. Description of the Related Art For example, it is very common to illuminate an actor or the like on a stage of a theater or the like with a spotlight. As a conventional irradiation means for irradiating a human body (hereinafter referred to as a moving object) with a spotlight, for example, as shown in FIG. 1, a remote control system for wirelessly controlling the irradiation direction of the spotlight 1, and FIG. As shown in, a remote control method of operating by wire is adopted.

That is, the wireless remote control is
An operator (operator) 2 who controls the spotlight has a transmitter 3, and the spotlight 1 is provided with a receiver 4 and a position control drive unit 5, and the spotlight 1 is wirelessly operated by the worker. Is controlled to a desired position.

In the wired remote control shown in FIG. 2, the operator 2 operates the controller 6 installed at a specific place, and the operation signal is input to the spotlight drive unit 8 by the wire 7. Then, the orientation of the spotlight 1 is controlled.

[0005]

However, both of the above-mentioned wireless remote control and wired remote control require an operator for driving and adjusting the spotlight. Further, since there is a distance between the driving adjustment position by the operator and the moving object, it is difficult to accurately align the central part of the spotlight with the central part of the moving object. There was a problem that it was difficult.

[0006]

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems of the prior art. A moving object has a transmitter for transmitting ultrasonic waves, and the spotlight receives the ultrasonic waves. The position detection sensor for controlling the irradiation direction of the spotlight is provided so that the irradiation direction of the spotlight can be always tracked so as to point to the position of the moving object. It is an object of the present invention to provide a spotlight irradiation direction control device which can be aimed at and can be sufficiently utilized for labor saving of writing work.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in detail based on the embodiments shown in the drawings.

In FIG. 3, 11 is, for example, a stage 12
A moving object that moves on the surface, 13 is a spotlight main body suspended from a ceiling 14 above the stage, and this spotlight main body 13 is controlled by the direction control drive means 15 to emit light from the spotlight main body 13. The irradiation direction is held adjustable.

Further, one or a plurality of ultrasonic wave transmitters 16 are carried on the moving object 11 via personal accessories such as necklaces, belts, bracelets and the like. Further, the spotlight body 13 has X-axis direction receiving sensors X ₁ and X ₂ which are vertically and horizontally (X-axis direction and Y-axis direction) spaced from the body 13 and a Y-axis direction receiving sensor. A receiving circuit 17 equipped with four sensors Y ₁ and Y ₂ is attached.

As shown in FIG. 4, the ultrasonic transmitter 16 has a power source 16-1 and an ultrasonic transmitter circuit 16-2. Reference numeral 18 denotes a position detection conversion circuit, and this position detection conversion circuit 18 is provided for each of the sensors X ₁ , X ₂ , Y.
₁ , a phase difference detection circuit 18-1 for detecting the phase difference between the ultrasonic signals received by Y ₂ and the phase difference detection circuit 18-
Each X-axis direction control circuit 18-2 for controlling the drive of the motor in the X-axis direction and the Y-axis direction based on the signal from 1
And a Y-axis direction control circuit 18-3.

The drive means 15 includes an X-axis drive motor 1
5-1 and Y-axis drive motor 15-2 and the control circuit 18
-2 and 18-3, and a drive circuit 15-3 for driving the X-axis drive motor 15-1 and the Y-axis drive motor 15-2, respectively, and the motors 15-1 and 15-3. -2 has a control pedestal 15-4 which operates by -2.

The configuration of this embodiment has been described above. Next, its operation will be described.

When an ultrasonic wave is transmitted from the ultrasonic wave transmitter 16 carried by the moving object 11, this ultrasonic wave transmitter 1
The ultrasonic waves emitted from 6 are received by the respective receiving sensors X ₁ , X ₂ , Y ₁ ,
Receive with Y ₂ . These receiving sensors X ₁ , X ₂ , Y ₁ ,
Since Y ₂ is arranged in the vertical and horizontal directions centering on the light irradiation opening of the spotlight body, if the light irradiation optical axis does not accurately face the moving object 11, ultrasonic waves received by each reception sensor will be transmitted. A phase difference (shift) will occur in the received signal from the device 16. This phase difference is detected by the detection circuit 18-1, and the X-axis direction control circuit 18- in the position detection conversion circuit 18 is programmed so that the phase difference becomes zero based on the phase difference signal.
2. The orientation is corrected (tracking) so that the irradiation optical axis of the spotlight main body 13 points to the central portion of the moving object 11 via the Y-axis direction control circuit 18-3 and the driving means 15.

In other words, the central part of the spotlight emitted from the spotlight body is pre-programmed so as to illuminate the ultrasonic transmitter 16 (moving object).
It is converted by the axial direction control circuit 18-2 and the Y-axis direction control circuit 18-3, and as a result, by the drive circuit 15-3.
The axis drive motor 15-1 and the Y-axis drive motor 15-2 are amplified to a level at which they can be driven, and the amplification control signal drives the motors 15-1 or 15-2, whereby the control pedestal 15-4 is used. Thus, the irradiation direction of the spotlight main body is drive-adjusted so as to always point to the moving object 11 that emits ultrasonic waves, and the moving object is always irradiated with the spotlight at a stable position.

Further, this spotlight irradiation direction control device is provided with a manual switching means so that directivity adjustment of the spotlight and on / off operation of the light can be performed by this manual operation, for example, when a moving object is superposed. When the sound wave transmitter is not possessed or when ultrasonic wave reception from the sound generator is disabled, the irradiation direction of the spotlight can be adjusted by manual operation.

[0016]

INDUSTRIAL APPLICABILITY As described above, according to the present invention, the ultrasonic transmitter 1 carried by the moving object 11 to be irradiated with the spotlight is carried.
6 and respective receiving sensors X ₁ arranged at four positions on the X-axis and Y-axis centering on the spotlight irradiation optical axis of the spotlight main body 13 and receiving the ultrasonic waves from the ultrasonic transmitter 16. , X ₂ , Y ₁ , Y ₂ , a phase difference detection circuit 18-1 for detecting the phase difference between the reception signals received by these reception sensors, and this phase difference detection circuit 18
Based on the output from -1, a spotlight irradiation direction control device having a spotlight main body drive means 15 for directing the spotlight irradiation optical axis to the moving object 11 so that the phase difference becomes zero. So, according to this,
The ultrasonic transmitter carried by the moving object and the X-axis centered on the irradiation optical axis of the spotlight for detecting the transmitter position
The spotlight body can be automatically tracked by the four receiving sensors arranged in the axial direction and the Y-axis direction so that the irradiation optical axis points to the central portion of the moving object. This eliminates the need for a worker (operator) to adjust the light position, which helps save labor. In addition, since the transmitter is held by the moving object, it is possible to perform fine control so that the center (optical axis) of the spotlight is directed to the center of the moving object.

[Brief description of drawings]

FIG. 1 is an explanatory view of a conventional spotlight irradiation direction control device.

FIG. 2 is an explanatory diagram of another conventional spotlight irradiation direction control device.

FIG. 3 is an explanatory diagram of a spotlight irradiation direction control device according to an embodiment of the present invention.

FIG. 4 is an explanatory diagram of a circuit configuration according to an embodiment of the present invention.

[Explanation of symbols]

11 ... Moving object 12 ... Stage 13 ... Spotlight main body 14 ... Ceiling 15 ... Direction control drive circuit 15-1 ... X-axis drive motor 15-2 ... Y-axis drive motor 15-3 ... Drive circuit 15-4 ... Control pedestal 16 ... ultrasonic transmitter 16-1 ... power 16-2 ... ultrasonic transmitter circuit 17 ... receiving circuit _{X 1, X 2, Y 1} ,
Y ₂ ... Reception sensor 18 ... Position detection conversion circuit 18-1 ... Detection circuit 18-2 ... X-axis direction control circuit 18-3 ... Y-axis direction control circuit

Claims (1)

[Claims] 1. An ultrasonic transmitter (16) carried by a moving object (11) to be irradiated with a spotlight, and an X-axis and a Y-axis centered on the spotlight irradiation optical axis of the spotlight body (13). Receiving sensors (X ₁ ), (X ₂ ), (Y ₁ ), (Y ₂ ) arranged at four points on the line and receiving ultrasonic waves from the ultrasonic transmitter (16).
And a phase difference detection circuit (18-1) for detecting the phase difference between the reception signals received by these reception sensors, and the phase difference detection circuit (18-1) based on the output from the phase difference detection circuit (18-1). A spotlight irradiation direction control device comprising a spotlight main body drive means (15) for directing the spotlight irradiation optical axis toward the moving object (11) so that zero becomes zero.