JP2746526B2 - Automatic control device for lighting equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an automatic control device of a lighting device for performing lighting for a staging effect in a theater, a studio, a hall, and the like.

[0002]

2. Description of the Related Art Generally, in stage lighting of a theater, it is necessary to locally illuminate a specific place on the stage by using a lighting device such as a spotlight in order to realize a desired effect on the stage. It is. If the object to be illuminated on the stage is a human or other moving object, or if it illuminates a specific location based on such a moving object, the object is illuminated. It is necessary to control the lighting device according to the movement to change its lighting direction. Until now, the illumination direction control of the illumination device has been usually performed while the operator of the illumination device visually confirms the movement of the target object.

[0003] However, in controlling the lighting direction of the lighting device by the operator, a high level of operating skill is required of the operator, and the desired lighting direction control is performed due to individual differences in the skill of the operator and fatigue of the operator. It is very difficult to reliably perform the operation for a long time. Moreover, in this type of lighting, a plurality of lighting devices are often used, and in that case, the same number of operators as the lighting devices are required.

Conventionally, an example of an automatic spotlight tracking device for tracking and illuminating a moving object is disclosed in Japanese Patent Application Laid-Open No. Sho 6 (1994).
It has been proposed by JP-A-4-33802. This device is composed of an ultrasonic transmitter, which is held on a moving target object irradiated with a spotlight and generates ultrasonic waves at regular intervals by a clock oscillator, and a plurality of ultrasonic detectors for detecting the ultrasonic waves. , A clock oscillator of a control device for transmitting a frequency very similar to the frequency of the clock oscillator of the object, and a time difference detection for detecting a time difference between a clock signal of the clock oscillator of the control device and a clock signal of the ultrasonic detection device. An arithmetic unit that calculates the distance between the ultrasonic detector and the object from the time difference signal to determine the position of the object, and a control device that controls the irradiation direction of the spotlight by the output of the arithmetic unit. Things.

In this device, theoretically, the position data of the moving object can be obtained, so that the illuminating device is controlled to automatically change the light projection direction and track the moving object. It is possible to illuminate.

However, this device has the following problems in practice. (1) It is necessary to approximate the frequency of the clock oscillator of the ultrasonic oscillator held by the moving object and the frequency of the clock oscillator of the control device with high accuracy , but achieving this is actually quite appropriate. Difficult. This difficulty is further increased when the number of moving objects becomes plural. To solve this problem, additional signal processing means such as synchronizing a plurality of clock oscillators with radio signals is required. (2) When there are a plurality of moving target objects, it is necessary to use ultrasonic waves having a frequency individually set for each target object, and accordingly, the ultrasonic detector also sets the set frequency. Must be used. In this case, additional signal processing means is required for each frequency, so that the above-described difficulty becomes more remarkable. (3) Since the above additional signal processing is required, complicated signal processing is required to obtain one position data for each moving object, and the required time is long. As a result, the temporal density of the obtained position data is inevitably low, and as a result, the control of the illumination device becomes coarse.

[0007]

As described above, the conventional control system for a lighting device requires a complicated configuration and complicated signal processing, and as a result, the accuracy of the movement of the moving object is reduced. However, there is a problem that it is not possible to achieve the control of the lighting device with high performance.

SUMMARY OF THE INVENTION An object of the present invention is to provide an automatic control device for a lighting device which can achieve highly accurate control of the lighting device in accordance with the movement of a moving object with a simple structure. Another object of the present invention is to provide an automatic control device for a lighting device that can achieve high-precision control of a lighting device for each target object even when a plurality of target objects move.

[0009]

An automatic control device for a lighting device according to the present invention comprises a central control device, a radio wave transmitting device for transmitting a radio signal in response to a transmission command signal from the central control device, and a moving object. An ultrasonic transmission device that is held and transmits an ultrasonic wave by detecting the radio signal, and has a time counter that is initialized by a start command signal from a central control device and starts a measurement operation, A plurality of ultrasonic detectors each arranged at a different fixed position for detecting ultrasonic waves transmitted from the transmitting device and stopping the measuring operation of the time counter, and a drive installed at the fixed position to change the illumination direction The central control device sends a transmission command signal for intermittently transmitting a radio signal to the radio wave transmitting device. At the same time as each transmission command signal, a time measurement system control unit that sends a start command signal to the time counters in all the ultrasonic detection devices, and time data based on the time measured by the time counter of the ultrasonic detection device, An arithmetic unit that calculates a coordinate position of the object in the spatial coordinate system based on position data based on a coordinate position occupied by the ultrasonic detection device in the set space coordinate system; and a calculated coordinate of the object. A lighting control unit that sends a lighting direction control command signal for the lighting device based on the position data based on the position and the position data based on the coordinate position of the lighting device in the spatial coordinate system.

[0010]

In the device having such a configuration, a radio wave signal is intermittently transmitted from the radio wave transmitting device in response to a transmission command signal from the central control device. The transmitted ultrasonic wave is transmitted from the ultrasonic transmission device. At the same time, the time counters in all the ultrasonic detection devices are initialized by the start command signal from the central control device, and time measurement is started, and the ultrasonic detection devices detect ultrasonic waves from the ultrasonic transmission devices. The elapsed time until the time is measured. However, since the time required for the radio signal from the radio wave transmission device to reach the ultrasonic transmission device can be virtually ignored, the measurement time obtained here is substantially the same as when the ultrasonic wave is transmitted from the ultrasonic transmission device. This is the time required to reach the ultrasonic detection device. Therefore, the time data based on the measurement time is data representing the magnitude of the distance between the target object and the ultrasonic detection device.

Then, based on the time data from the plurality of ultrasonic detecting devices and the position data based on the coordinate positions occupied by the ultrasonic detecting devices in the space coordinate system, the arithmetic unit of the central control unit performs the relevant operation on the target object. The coordinate position in the spatial coordinate system is calculated, and the position data based on the calculated coordinate position of the target object is referred to the position data based on the coordinate position of the lighting device, and the lighting direction control unit of the central control device controls the lighting device. Is transmitted, whereby the illuminating device is controlled to illuminate a desired portion with respect to the target object.

In the present invention, when there are a plurality of moving objects, each of the objects is caused to hold the ultrasonic wave transmitting device. Then, according to the transmission command signal from the central control device, the radio wave signals identified corresponding to each of the ultrasonic transmission devices are sequentially transmitted from the radio transmission device, and the time counters of all the ultrasonic detection devices are transmitted to the time counters. Then, a start command signal is transmitted simultaneously with each transmission command signal, and each ultrasonic transmission device transmits an ultrasonic wave by detecting an identified radio signal corresponding to itself.

[0013] According to such a configuration, the ultrasonic wave transmitting device held by each object is specified by the discriminated radio signal specified by the central control device, so that the time from the ultrasonic detecting device can be reduced. It is possible to identify which object the data pertains to the ultrasonic transmission device held by the object, and thereby, it is possible to control the illumination direction of the lighting device based on the object.

[0014]

FIG. 1 is an explanatory view showing a state in which an automatic control device for a lighting device according to a first embodiment of the present invention is applied to a theater. Reference numeral 1 denotes a theater, and reference numeral 2 denotes a stage thereof. FIG.
FIG. 2 is an explanatory diagram showing an outline of main functional parts in this embodiment and a state of their connection. As shown in FIGS. 1 and 2, a central control device 10 is provided in the theater 1, and a radio wave transmitting device 20 that transmits a radio signal R in accordance with a transmission command signal issued from the central control device 10 is a central control device 1.
0 is provided. Reference numeral 30 denotes an ultrasonic transmission device held by an object such as a person moving on the stage 2. This ultrasonic transmission device 30 is a radio wave transmission device 2
Radio wave detector 31 for detecting a radio signal R transmitted from 0
The radio wave detector 31 transmits the ultrasonic wave S by detecting the radio wave signal R.

In the theater 1, for example, ceilings, walls,
A plurality of ultrasonic detectors 40 each having a time counter 41 are installed on the floor and other appropriate fixed positions, and a lighting device 50 whose lighting direction is three-dimensionally variable is located at a fixed position facing the stage 2. is set up.

As shown in FIG. 3, the central control unit 10
Time measurement system control unit 11, calculation unit 12, and illumination control unit 1
3. Each of the ultrasonic detection devices 40 and the illumination device 50 are connected to the time measurement system control unit 11 and the illumination control unit 13 of the central control device 10 by wire or wirelessly so that data communication is possible. .

The time measuring system control unit 11 includes the radio wave transmitting device 2
0 and a start command signal for initializing and resetting the time counter 41 in each of the ultrasonic detection devices 40 and further starting the measurement operation. And has a function of receiving the time data from the controller 12 and transmitting the time data to the calculation unit 12.

As will be described in detail later, the arithmetic unit 12 uses the time data from each of the ultrasonic detecting devices 40 and the position data of the ultrasonic detecting devices 40 based on the coordinate position in the spatial coordinate system to generate the ultrasonic transmitting device. 30 has a function of calculating a coordinate position in the spatial coordinate system. In order to exhibit such a function, the arithmetic unit 12 stores, for example, coordinates occupied by each of the ultrasonic detection devices 40 in a three-dimensional spatial coordinate system arbitrarily set with an arbitrary position in the theater 1 as an origin. Position data based on the position is registered, and the position data can be called up as needed. Further, position data based on a coordinate position occupied by the lighting device 50 in the spatial coordinate system is registered so as to be callable.

The illumination control unit 13 refers to the position data based on the coordinate position of the object calculated by the arithmetic unit 12 and the position data based on the coordinate position of the illumination device 50 in the spatial coordinate system, and controls the illumination device 50. It has a function of sending an illumination direction control command signal to be controlled.

In the above, the radio wave signal R transmitted from the radio wave transmitting device 20 according to the transmission command signal is a signal of a specific frequency component, and serves as a trigger for transmitting the ultrasonic wave S to the ultrasonic transmitting device 30 . Play an effect. The frequency of the radio signal is not particularly limited and can be arbitrarily determined. The radio wave transmitting device 20 may be installed at a position different from the central control device 10, or may be integrated with the central control device 10.

The ultrasonic wave transmitting device 30 held by the object is a radio wave signal R transmitted by the radio wave transmitting device 20.
Has a function of transmitting an ultrasonic wave S of a specific frequency by detecting the radio wave signal. The frequency of the ultrasonic wave varies depending on the size of the theater 1 and the range in which the target body moves, but may range from 20 kHz to 8 kHz.
It is preferable to select within the range of 0 kHz.

The ultrasonic transmission device 30 must be of a portable type, and a small battery is preferably used as a driving power source. This ultrasonic transmission device 30
A band or other holding unit may be provided for the purpose of holding the object, or the ultrasonic transmitting device 3
It is preferable to provide a pin or clip for fixing the 0 to a part of the costume.

The ultrasonic detector 40 has a time counter 4
1 and the ultrasonic detector 42, and stops the measurement operation started by the start command signal by detecting the ultrasonic wave. It has a function of measuring the time T until the detection of.

A plurality of ultrasonic detecting devices 40 are arranged at appropriate intervals, and all time data obtained by each ultrasonic detecting device 40 is supplied to the time measuring system control section 11 of the central control device 10. You. The number of the ultrasonic detection devices 40 is three or more, preferably four or more, and the arrangement state thereof is appropriately set according to the size, structure, and other conditions of the theater. As shown in the figure, it is preferable that the four ultrasonic detection devices 40 particularly arranged adjacent to each other are arranged at three-dimensionally different positions so that not all of them are present on the same plane.

As shown in FIG. 5, the illuminating device 50 has a light source lamp 51 made of, for example, a xenon discharge lamp and a lens 52, and illuminator 53 for projecting light in a specific direction.
And a first motor 5 for rotating the illuminator 53 around a horizontal rotation axis perpendicular to the optical axis L as indicated by an arrow x.
4 and a driving mechanism 56 having a second motor 55 that rotates around a vertical rotation axis perpendicular to the optical axis L as indicated by an arrow y.
The light projection direction is changed.

The driving characteristic value of the driving mechanism 56 in the lighting device 50 is registered in the central control device 10. For example,
The reference stop positions of the first motor 54 and the second motor 55 are set as starting reference positions, respectively.
The coordinate position of the illumination target point in the spatial coordinate system is registered in the illumination control unit 13 of the central controller 10, and the first motor 54 is set to the reference position state and the second motor 55 is set to an arbitrary angle state position from the reference position. Illuminator 5 when stopped
The coordinate position of the lighting target point according to 3 is registered in the lighting control unit 13 of the central control device 10. Specifically, with reference to two vectors connecting each of the two spatial coordinates and the spatial coordinates of the lighting device 50, a vector connecting the ultrasonic transmitting device 30 and the lighting device 50 held by the moving object is used. Is determined, and the illumination device 50 is determined based on this vector.
Is controlled.

The operation of the above-described automatic control device for the lighting device will be described. The central control device 10 includes a radio wave transmitting device 20
To the ultrasonic detection device 4 at the same time.
A start command signal of the time counter 41 is sent to 0.
As a result, the radio wave signal R transmitted from the radio wave transmitting device 20 is detected by the radio wave detector 31 of the ultrasonic wave transmitting device 30, and at the same time, the ultrasonic wave
Is transmitted.

On the other hand, in the ultrasonic detector 40, the time counter 41 is initialized by the start command signal, and the measuring operation is started. Then, the measuring operation of the time counter 41 is stopped by the ultrasonic detector 42 detecting the ultrasonic wave. The time data based on the measurement time is transmitted from the time counter 41 to the time measurement system control unit 11 of the central control device 10, and the calculation unit 12
Supplied to

Here, the time T measured by the time counter 41 is the time from when the start command signal is transmitted to when the ultrasonic wave is detected by the ultrasonic detecting device 40. Since the time from the transmission of the ultrasonic wave by the ultrasonic transmission device 30 to the transmission of the ultrasonic wave is extremely short, it can be practically ignored. Therefore, the measurement time T is calculated from the time when the ultrasonic transmission device 30 transmits the ultrasonic wave to the ultrasonic detection device. This is substantially the same as the time until the detection of the ultrasonic wave by 40. Therefore, the time data corresponds to the distance d (see FIG. 2) between the ultrasonic detection device 40 and the object holding the ultrasonic transmission device 30.

The arithmetic unit 12 of the central control unit 10 includes, for example, three or four time data selected from the time data transmitted from each of the ultrasonic detection devices 40,
Based on the position data of the ultrasonic detection device 40 relating to the time data, the coordinate position of the ultrasonic transmission device 30 in the spatial coordinate system is calculated from the magnitude of the velocity of the ultrasonic wave.

When a large number of ultrasonic detecting devices are provided,
In other words , the selected time data is in order from the smallest detection time T relating to the time data by all the ultrasonic detection devices 40, or in order from the largest detection energy of the ultrasonic waves detected by the ultrasonic detection device 40. Preferably, it is selected. Such time data in which the detection time T is short or time data in which the energy of the detected ultrasonic wave is large is actually obtained by the ultrasonic detection device 40 located in the region closest to the target object. Therefore, by selecting the time data in this way, it is possible to reliably avoid detection of noise ultrasonic waves that cause an error such as ultrasonic waves reflected by a theater wall or the like.

When three time data are used, the coordinate position of the ultrasonic transmitting device 30 can be calculated according to the following principle. That is, as shown in FIG. 6, the ultrasonic detecting device 40 and the ultrasonic transmitting device 3 are calculated based on time data detected by the three ultrasonic detecting devices 40.
When the distances between 0 are r1, r2, and r3, and the positions of the ultrasonic detection devices 40 are P1, P2, and P3, the positions of the ultrasonic transmission devices 30 are points P1, P2, and P, respectively.
It should be on the intersection of three spheres S1, S2, S3 centered at 3 and with radii r1, r2, r3. More specifically, a set of intersections of the two spherical surfaces S1 and S2 is a circle, which is shown as a hatched ellipse H in FIG. The intersection of the ellipse and the spherical surface S3 is the intersection of the three spherical surfaces. Therefore, simultaneous equations representing such three spherical surfaces S1, S2, and S3 in the space coordinate system may be set and solved to find the solution. Here, the number of obtained solutions is 1 or 2, but 2
When one solution exists, a more rational solution is selected in consideration of other conditions, for example, the level in the height direction of the object.

In the case of four time data,
As shown in FIG. 7, the coordinate positions of the four ultrasonic detection devices 40 in the X, Y, Z space coordinate system are (x ₁ , y ₁ ,
z ₁ ), (x ₂ , y ₂ , z ₂ ), (x ₃ , y ₃ ,
z ₃ ), (x ₄ , y ₄ , z ₄ ), and the ultrasonic transmitter 3
When the coordinate position of 0 is (x, y, z), the distance d between the ultrasonic transmitting device 30 and each of the four ultrasonic detecting devices 40 is d.
Each of 1, d2, d3 and d4 is represented by the following formulas. (D1) ² = (xx ₁ ) ² + (yy ₁ ) ² + (zz ₁ )
² (d2) ² = (xx ₂ ) ² + (yy ₂ ) ² + (zz ₂ )
² (d3) ² = (xx ₃ ) ² + (yy ₃ ) ² + (zz ₃ )
² (d4) ² = (xx ₄ ) ² + (yy ₄ ) ² + (zz ₄ )
² Therefore, by solving the above equations for x, y, and z, the coordinate position (x,
y, z) can be calculated exactly.

The ultrasonic transmission device 30 calculated in this way
Based on the position data based on the spatial coordinates of the lighting device 50, the position data based on the spatial coordinates of the lighting device 50, and the driving characteristic value of the driving mechanism 56, a lighting direction control command signal from the lighting control unit 13 of the central controller 10 Illumination direction control of the illumination device 50 is performed, and as a result, illumination of a location with respect to the object is achieved.

In the above, the time counter 41 in the ultrasonic detection device 40 can measure time with an accuracy of, for example, about 0.0001 seconds. Therefore, although this accuracy is related to the range of the error in the position data of the ultrasonic transmitting device 30, the air propagation speed of the ultrasonic wave is about 340 m.
/ Sec, the error in the distance on the stage is at most 3.4 cm. Therefore, it is possible to obtain the coordinate position of the ultrasonic wave transmitting device 30, that is, the target object with extremely high accuracy.

The time required for one control operation, that is, the time required from the transmission of the transmission command signal by the central control device 10 to the control of the lighting direction of the lighting device, is as follows.
Although it depends on the magnitude of the distance between the ultrasonic wave transmitting device 30 and the ultrasonic wave detecting device 40, it is, for example, about 50 to 200 msec. This means that the transmission of the transmission command signal by the central controller 10, in other words, the transmission of the radio signal is performed in 5 to 2 seconds per second.
This means that it can be performed at a time interval of about 0 times, that is, a short time interval of 200 msec or less, and
According to the present invention, the illumination direction control can be performed with a very high temporal density.

Assuming that the time density of the transmission of the transmission command signal by the central controller 10 is 20 times per second, the time interval is 50 msec. Therefore, within this time, the transmission of the illumination direction control command signal and the illumination by the transmission are performed. It is necessary that the control of the device 50 be completed, and for that purpose, the time that can be measured by the time counter 41 of each ultrasonic detection device 40 needs to be at most less than about 50 msec. Then, the range of the distance that the ultrasonic waves reach within the longest measurement time of the time counter 41 is the detectable area covered by the ultrasonic detection device 40. Therefore, the longest measurement time of the time counter 41 is set to 4
When set to 5 msec, the ultrasonic wave propagation speed in the air is about 340 m / sec.
Is a spherical area with a radius of 15.3 m.
Therefore, the ultrasonic detecting device must be located at the position of the ultrasonic transmitting device.
That is, three or more spherical regions having a radius of 15.3 m centered on the position of the target object need only be present.

As can be understood from the above description, according to the above-mentioned automatic control device for the lighting device, the ultrasonic wave transmitting device 30
Is detected by each of the ultrasonic detection devices 40. The length of time measured by each of the ultrasonic detection devices 40 depends on the position of the ultrasonic transmission device 30, that is, the position of the target object. Therefore, the coordinate position of the target object in the spatial coordinate system is obtained, and the illumination direction of the illumination device 50 is controlled, so that the target object can be illuminated with reference to the position. .

In addition, since the illumination direction of the illumination device 50 can be controlled at a rate of, for example, 5 times or more, preferably 10 times or more per second, even when the target body moves at a considerably high speed, it can be controlled. The desired illumination can be performed with high accuracy faithfully to the movement, and the movement of the illumination location becomes extremely smooth.

Further, in the ultrasonic wave transmitting device 30, the ultrasonic wave is transmitted only when the radio wave signal is transmitted from the radio wave transmitting device 20, and the ultrasonic wave is not continuously and continuously transmitted. The power is low and a long possible use time is obtained even with a battery-based power supply.

Illumination by the illumination device 50 is, specifically,
The present invention can be executed in various modes using the object as a reference of the position. The simplest form of illumination is to directly illuminate a moving object. In this case, the direction of the lighting device 50 is controlled to the direction of the calculated coordinate position of the target object.

When two or more lighting devices 50 are used, control is performed by including a unique identification signal corresponding to each lighting device in the lighting direction control command signal from the lighting control unit 13. Lighting device 50 to be selected, and then for this selected lighting device 50,
It is possible to control the illumination direction. In this case, illumination of a plurality of locations can be executed with reference to one target object.

It is also possible to illuminate a moving object at a location having a specific positional relationship. For example, as shown in FIG. 8, when the coordinate position of the ultrasonic transmission device 30 is (x, y, z), X ′ = x +
a, Y ′ = y + b Z ′ = z + c It is possible to illuminate a position represented by a coordinate position (X ′, Y ′, Z ′) defined by a specific expression, thereby providing a moving target object. On the other hand, a portion having a fixed positional relationship is illuminated.

Further, by controlling each of the four illumination devices, for example, as shown in FIG. 9, a specific positional relationship defined by the following formulas with respect to the ultrasonic transmission device 30 is obtained. It is possible to illuminate the four locations A, B, C and D. Location A X1 = x, Y1 = y + a, Z1 = z location B X2 = x + a, Y2 = y, Z2 = z location C X3 = x, Y3 = ya, Z3 = z location D X4 = x−a, Y4 = Y, Z4 = z

As described above, when illuminating a location having a specific fixed positional relationship with respect to the object, the illuminating location naturally moves together with the object.

Further, the illumination can be executed in such a manner that the positional relationship changes with time using the object as a reference for the position. For example, as shown in FIG.
When using A, 50B, 50C, and 50D,
At time t1, the illumination device 50A causes the coordinate position (X
1, Y1, Z1), the coordinate position (X2, Y2, Z2) by the lighting device 50B, and the coordinate position (X3, Y3, Z3) by the lighting device 50C, the lighting device 50D.
Illuminates the coordinate position (X1, Y1, Z1), respectively, and at time t2 after the elapse of the minute time Δt, the illumination device 50A causes the coordinate position (X4, Y4, Z4) to be illuminated by the illumination device 50B. (X1, Y1, Z
The position (1) is located at the coordinate position (X2,
Each lighting device can be controlled such that the lighting device 50D illuminates the position of (Y2, Z2) at the coordinate position (X3, Y3, Z3). In this case, the movement of the lighting location by each lighting device can be performed in any mode, such as a mode of switching at a time, a mode of gradually moving the lighting position, or a mode of moving stepwise.

Next, a second embodiment of the present invention will be described. FIG. 11 is an explanatory diagram of an automatic control device for a lighting device according to a second embodiment of the present invention. In this example, each of two objects moving on the stage 2 uses an ultrasonic wave transmitting device 30. Are held, and two illumination devices 50 are provided.

Then, the time measurement system control unit 11 of the central control unit 10 causes the radio wave transmitting device 20 to alternately transmit the two types of radio signal identified corresponding to each of the ultrasonic transmitting devices 30. It has a function of issuing a transmission command signal.
The discriminated radio signal may be, for example, a signal having a different frequency, but is a radio signal having the same frequency and includes a unique discrimination component set for each of the ultrasonic transmitters 30. You may.

On the other hand, the radio wave detector 31 in each of the ultrasonic wave transmitting devices 30 held by the two objects has the identification signal corresponding to itself among the discriminated radio signal transmitted by the radio wave transmitting device 20. It has a function of detecting a converted radio signal, and transmits an ultrasonic wave by detecting the radio signal. Further, regardless of which of the identified radio signals, the time measurement system control unit 11 starts the transmission from the central control device 10 to all the ultrasonic detection devices 40 at the same time. Sends a command signal.

As for the two lighting devices 50, a unique identification signal corresponding to each of the plurality of lighting devices 50 is included in the lighting direction control command signal from the lighting control unit 13, as in the case described above. In this way, the illumination device 50 to be controlled is selected by the identification signal, and the selected illumination device 50 is controlled to change its light projection direction. Except for the matters described above, the configuration is the same as that of the first embodiment described above.

According to the device having such a configuration, the illumination of the two illumination devices 50 is performed basically by using each of the two objects as a position reference, similarly to the first embodiment. The direction can be controlled.

For example, in the time measurement system control unit 11 of the central control unit 10, two kinds of radio wave signals identified by the transmission command signal corresponding to the ultrasonic transmission device 30 of one target object and the other target object. Are alternately transmitted 2.5 to 10 times, preferably 5 to 10 times, respectively, per second, thereby detecting the position of each object and controlling the lighting direction by each lighting device 50 accordingly. It is possible.

Also in this embodiment, the specific location and mode of illumination by the illumination device 50 can be variously set as in the case described above. That is, to illuminate each moving object, to illuminate a portion having a specific positional relationship with each moving object, and to illuminate a portion having a temporally changing positional relationship with respect to each moving object. can do. In this embodiment, the specific illuminating device 50 does not always need to be controlled in relation to the specific ultrasonic transmitting device 30 or the target object, and the ultrasonic wave to be used as a position reference, if necessary. The transmitting device can be switched to another ultrasonic transmitting device. In addition, one specific ultrasonic transmission device 30 is used as a reference for a common position,
It is also possible to control a plurality of lighting devices 50.

As described above, in the present invention, the number of objects and the number of lighting devices are not particularly limited. However, when the number of objects is large, the time interval from one control operation of collecting position data of one object and the lighting direction control operation of the lighting device thereby to the next control operation is long. Become. However, since the time density of the control needs to be 2.5 times or more per second (400 msec or less at a time interval) in practice, the discriminated radio signal from the common radio wave transmitting device 20 is used. Is selected according to this condition. For example, if the transmission time interval of the radio signal is 50 msec, the number of types of the discriminated radio signal is preferably 8 or less. In this case, the target object or the ultrasonic wave to be processed by one control system The number of transmitting devices is eight or less.

Further, when the present invention is applied to a larger number of objects, a plurality of control systems according to the present invention may be provided. In this case, in order to prevent crosstalk of communication between the control systems. It is necessary that the frequency of the radio wave signal from the radio wave transmitting device and the frequency of the ultrasonic wave transmitted from the ultrasonic wave transmitting device be clearly different. Of course, if the central controller has enough capacity,
It can be commonly used for a plurality of control systems.

[0056]

According to the automatic control device of the lighting device according to the present invention, the coordinate position in the spatial coordinate system of the object holding the ultrasonic transmitting device can be easily obtained by utilizing the characteristics of the radio wave and the ultrasonic wave. Since the lighting apparatus is accurately calculated by the processing and the lighting device is controlled based on the calculated position, the moving object is used as a reference for the position, and the moving object is in a fixed positional relationship with the object, that is, the moving object is fixed in time. It is possible to illuminate a location having a positional relationship or a time-varying positional relationship, and it is easy to process information, so that it is easy to increase the temporal density of the control operation and, as a result, to move The illumination direction control of the illumination device with high accuracy can be achieved in accordance with the movement of the object.

Further, even when there are a plurality of moving objects, the central control unit can identify the ultrasonic wave transmitting device held by each of the objects.
For each target object, it is possible to achieve highly accurate illumination direction control of the illumination device as described above.

[Brief description of the drawings]

FIG. 1 is an explanatory diagram showing a state in which a configuration of an automatic control device for a lighting device according to a first embodiment of the present invention is applied to a theater.

FIG. 2 is an explanatory diagram showing an outline of main functional parts in the first embodiment and a state of their connection.

FIG. 3 is a block diagram schematically showing a configuration of a central control device.

FIG. 4 is an explanatory diagram showing an arrangement state of an ultrasonic detection device.

FIG. 5 is an explanatory diagram illustrating a configuration of an example of a lighting device.

FIG. 6 is an explanatory diagram of a principle in which a position of an ultrasonic transmitting device is specified by three ultrasonic detecting devices.

FIG. 7 is an explanatory diagram of a principle in which the position of an ultrasonic transmitting device is specified by four ultrasonic detecting devices.

FIG. 8 is an explanatory diagram showing one mode of illumination performed by a lighting device controlled by the device of the present invention.

FIG. 9 is an explanatory diagram showing another mode of illumination.

FIG. 10 is an explanatory diagram showing still another mode of illumination when illuminating a location having a positional relationship that changes with time.

FIG. 11 is an explanatory diagram showing a state in which a configuration of an automatic control device for a lighting device according to a second embodiment of the present invention is applied to a theater.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Theater 2 Stage 10 Central control device R Radio signal 11 Time measurement system control unit 12 Operation unit 13 Lighting control unit 20 Radio transmission device 30 Ultrasonic transmission device 31 Radio wave detector S Ultrasonic 40 Ultrasonic detection device 41 Time counter 42 Super Sound wave detector 50 Lighting device 51 Light source lamp 52 Lens 53 Lighting device L Optical axis 54 First motor 55 Second motor 56 Drive mechanism

Claims (8)

(57) [Claims] 1. A central control device, a radio wave transmitting device for transmitting a radio signal in response to a transmission command signal from the central control device, and an ultrasonic wave transmitted by being held by a moving object and detecting the radio signal. And a time counter that is initialized by a start command signal from the central control device and starts a measurement operation, and detects an ultrasonic wave transmitted from the ultrasonic wave transmitting device, and sets a time counter. A plurality of ultrasonic detection devices each arranged at a different fixed position for stopping the measurement operation, and an illumination device having a drive mechanism for changing the illumination direction, which is installed at the fixed position, the central control device includes: A transmitting command signal for intermittently transmitting a radio signal to the radio transmitting device is transmitted, and simultaneously with each transmitting command signal, all the ultrasonic detecting devices are transmitted. A time measurement system control unit that sends a start command signal to a time counter in the device, time data based on the time measured by the time counter of the ultrasonic detection device, and the ultrasonic detection device in a set spatial coordinate system A calculating unit that calculates a coordinate position of the object in the spatial coordinate system based on position data based on a coordinate position occupied by; position data based on the calculated coordinate position of the object;
An illumination control unit for transmitting an illumination direction control command signal for the illumination device based on position data based on the coordinate position of the illumination device in the spatial coordinate system. 2. A central control device; a radio wave transmitting device for transmitting a radio signal in response to a transmission command signal from the central control device; and a discriminating device which is held by each of two or more moving objects and corresponds to itself. An ultrasonic transmission device that transmits ultrasonic waves by detecting a received radio signal, and a time counter that is initialized by a start command signal from a central control device and starts a measurement operation, wherein the ultrasonic transmission device A plurality of ultrasonic detectors arranged at different fixed positions to detect the ultrasonic waves transmitted from and stop the measurement operation of the time counter, and a driving mechanism installed at the fixed position to change the illumination direction The central control device sequentially transmits a radio signal identified corresponding to each of the ultrasonic transmitting devices to the radio transmitting device. Next, while transmitting the transmission command signal to be transmitted, simultaneously with each transmission command signal,
A time measurement system control unit that sends a start command signal to a time counter in all the ultrasonic detection devices, and time data based on the time measured by the time counter of the ultrasonic detection device, and in a set spatial coordinate system. An arithmetic unit that calculates a coordinate position of the object in the spatial coordinate system based on position data based on a coordinate position occupied by the ultrasonic detection device; anda position data based on the calculated coordinate position of the object.
An illumination control unit for transmitting an illumination direction control command signal for the illumination device based on position data based on the coordinate position of the illumination device in the spatial coordinate system. 3. The arithmetic unit of the central control device,
3. The coordinate position of a target object is calculated by processing time data from three ultrasonic detection devices arranged at different positions.
6. The automatic control device for the lighting device according to claim 1. 4. The arithmetic unit of the central control device,
3. The illumination device according to claim 1, wherein the coordinate position of the target object is calculated by processing time data from a plurality of ultrasonic detection devices that do not exist on the same plane. 4. Automatic control device. 5. The illumination device according to claim 1, wherein the illumination direction control command signal from the central control device controls the illumination device so that the target object is illuminated. Automatic control device. 6. An illumination direction control command signal from the central control device controls an illumination device so that a portion having a specific positional relationship with the target object is illuminated based on the target object. The automatic control device for a lighting device according to claim 4. 7. An illumination direction control command signal from the central control device controls the illumination device such that a location that changes with time in a manner in which a positional relationship with respect to the target object is determined with respect to the target object is illuminated. The automatic control device for a lighting device according to any one of claims 1 to 4, wherein the automatic control device is a lighting device. 8. The time interval of a radio signal transmitted from a radio transmitter and corresponding to a specific ultrasonic transmitter is 400 m.
The automatic control device for a lighting device according to claim 1 or 2, wherein the time is not more than sec.