JPH0589966A - Monitoring device for dimming output - Google Patents

Abstract

PURPOSE:To enable monitoring in real time by generating a current integrated value through the averaging of dimming outputs from dimmers, and sampling the value as data on dimming outputs. CONSTITUTION:Dimming outputs output by a plurality of dimmers (SCR) 1 are averaged by an averaging circuit 2 and these averaged outputs are digitized by an A/D converter circuit 3 by time division, and are 4 digitally transferred and then converted into analogue form by a D/A converter circuit 5, and 6 transferred in analogue form and then held in a sample and hold circuit 7 and distributed to corresponding LED displays 8. Thus an averaging circuit 2 is provided for every dimmer 1 and an average value approximating dimming output is generated by the averaging circuit 2 and dimming output is sampled from the average value whereby monitor display of two-line transfer method is made possible in real time.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION The present invention is applied to a television studio,
Regarding the dimming monitor device for lighting in theaters, etc.,
The present invention relates to a dimming output monitor device that samples and holds the dimming output from a dimmer and controls two-wire transmission of the dimming output in real time.

[0002]

2. Description of the Related Art Generally, a dimming monitor device for displaying a dimming level is disclosed in Japanese Patent Publication No. 58-36476. This is provided with a bar graph display next to the fader to display the dimming level of the current scene and the next scene. However, since such a bar graph display displays the level of the stored scene, it is not possible to grasp how bright the lamp is dimmed, and it is not linear with the brightness. On the other hand, the dimming level display device disclosed in Japanese Patent Application Laid-Open No. 57-883 displays the level based on the firing angle width of the dimming phase control signal. In other words, since this level display device displays the level by the pulses counted in the point call angle width of the dimming output from the dimmer, it is possible to make a linear display with respect to the amount of dimming change. there were.

[0004]

However, according to the dimming level display device of the dimming phase control described above, even if the dimming operation change amount is linear, the current change amount and the lamp brightness change are linear. Due to the characteristic of the lamp that does not change, the actual light of the lamp and the displayed level are not necessarily linear.

Further, since the dimming level display based on the pulse count of the firing angle width of the dimming phase control is not linear in the change of the firing angle width and the output voltage of the dimming output, the level display shows the dimming output. It does not correspond to the amount of change. In order to solve such a problem, there was a circuit provided with an effective value conversion circuit that outputs the effective value of the phase-controlled dimming output, but this circuit was expensive and there was a problem in terms of cost. ..

Further, a dimmer used in a stage or the like requires a large number of control channels (100 to 500 channels), and thus, the dimming outputs of multiple channels are monitored in a dimming operation room apart from the dimmer. In this case, it is difficult and difficult to connect as many monitor transmission lines as the number of channels in order to provide a monitor in the dimming operation room.

Therefore, the present invention eliminates the above-mentioned drawbacks of the conventional dimming output monitor device and controls while monitoring the dimming output data from the dimmers provided for each of the multiple channels in real time. It is an object of the present invention to provide a dimming output monitor device of a two-wire transmission system that can perform a linear display even with respect to the amount of change in the actual light of the lamp, at low cost.

[0008]

In order to solve the above-mentioned problems, according to the present invention, in claim 1, as shown in FIG. 1, an averaging circuit for averaging the dimming output from the dimmer. 2, an A / D conversion circuit 3 for time-division and A / D conversion of the dimming output output by the averaging circuit 2, and a digital signal for transmitting a digital signal output output by the A / D conversion circuit 3. Transmission circuit 4 and D / A conversion circuit 5 for D / A converting the digital signal output transmitted by this transmission circuit
And a sample-hold circuit 7 that samples and holds the analog conversion output output from the D / A conversion circuit 5.

Further, the dimming output monitor device according to claim 2 is
3. The dimming output monitor device according to claim 1, wherein an averaging circuit for averaging the dimming output from the dimmer is provided with the dimming output from the dimmer as shown in FIG. A half-wave rectifier circuit 2a that performs half-wave rectification of an optical output waveform, a current value conversion circuit 2b that detects the voltage value of the half-wave rectification output by this half-wave rectification circuit 2a and converts it into a current value, and this current value And an averaging circuit 2c for integrating and averaging the current values output by the current value conversion circuit 2b for conversion.

Further, the dimming output monitor device according to claim 3 is
As shown in FIG. 5, a voltage detection circuit 9 that detects the voltage value of the dimming output from the dimmer, and a reset pulse generation circuit 10 that generates a reset pulse for each cycle of the commercial power supply.
And a current average value output circuit 11 for converting the voltage waveform detected by the voltage detection circuit 9 into a current waveform and integrating and averaging the current value, and a current average value output by the current average value output circuit 11. And a sample hold circuit 12 for inputting a reset pulse generated by the reset pulse generating circuit 10, outputting the held current average value as dimming output data, and resetting the average value. It is characterized by that.

[0011]

As described above, the dimming output monitoring device of the present invention averages the dimming output from the dimmer to generate a current integrated value, and the averaged current integrated value is used as the dimming output data. Since the data is sampled, the dimming output data can be transmitted and can be easily monitored.

Further, in the dimming output monitor device according to the second aspect, the dimming output waveform from the dimmer is half-wave rectified and converted into a current waveform, and then the current value is integrated to obtain an integrated current average value. Therefore, the dimming output data can be sampled.

Further, in the dimming output monitor device according to the present invention, the voltage waveform of the dimming output from the dimmer is detected and changed into a current waveform, and from the average value of the current values, one cycle of the commercial power source is detected. Refresh processing is performed by inputting a reset pulse from the reset pulse generation circuit every time, and sample holding is performed. Therefore, the monitor processing time can be changed depending on the pulse interval of the reset pulse.

[0014]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a block diagram showing the overall arrangement of a dimming output monitor device 20a according to the first embodiment of the present invention.

The dimming output monitoring device 20a includes a plurality of average values for averaging the dimming outputs for each half cycle output by the plurality of SCRs 1 for phase-controlling the power supply to the lamp (not shown). A conversion circuit 2, an A / D conversion circuit 3 that inputs the averaged outputs output by the plurality of averaging circuits 2 and performs digital conversion, and a digital that transmits the digital output converted by the A / D conversion circuit 3. Transmission circuit 4,
The digital signal output transmitted by the digital transmission circuit 4 is D /
A D / A conversion circuit 5 for A conversion, an analog transmission circuit 6 for transmitting the analog output converted by the D / A conversion circuit 5, and a sample hold circuit for sampling and holding the analog output transmitted by the analog transmission circuit 6. It consists of

A plurality of SCRs of the dimming output monitor device 20a
The dimming output that 1 outputs is a sawtooth output waveform as shown in FIG. When the averaging circuit 2 performs averaging, the average value of the waveform shown in FIG. 2B is obtained.

The averaged output is time-divided in the A / D conversion circuit 3 to be digitally changed, digitally transmitted (see FIG. 2 (c)), and then analog-converted in the D / A conversion circuit 5. After analog transmission (see FIG. 2 (d)), it is held by the sample hold circuit 7 and distributed to the corresponding LED display 8.

In the present embodiment, an averaging circuit is provided for each dimmer, an average value approximating the dimming output is created by the averaging circuit, and sampling is performed from the average value. It became easier to display on the monitor by the two-wire transmission method in real time, which was difficult. In the above-described embodiment, the example of the configuration in which the monitor display is output as bright and dark illumination has been described, but the configuration may be such that the dimming output level is converted into a numerical value and displayed in the range of 0 to 100. Further, the dimming output may be obtained by a method in which an insulation current is reduced by a resistor and a photocoupler for reducing insulation voltage by a transformer.

FIG. 3 is a block diagram showing only the main part of the dimming output monitoring device 20b according to the second embodiment of the present invention. The average value in the dimming output monitoring device 20a according to the first embodiment is shown. It is the block block diagram which improved the conversion circuit 2.

The dimming output monitor device 20b of this embodiment is the averaging circuit 2 of the dimming output monitor device 20a of the first embodiment.
Is a half-wave rectifier circuit 2a that half-wave rectifies the dimming output waveform output from the plurality of SCRs 1 as a dimmer, and detects the voltage value of the half-wave rectification output from the half-wave rectifier circuit 2a to detect the current. A current value conversion circuit 2b for converting into a value and an averaging circuit 2c as means for integrating and averaging the current values output by the current value conversion circuit 2b.

According to the dimming output monitor device 20b of this embodiment, the dimming output waveforms respectively output from the plurality of SCRs 1 are phase-controlled as shown in FIG.
The half-wave rectification circuit 2a detects the voltage value (see FIG. 4B) in one cycle from the half-wave rectification, the current value conversion circuit 2b converts it into a current value, and the current value output from the current value conversion circuit 2b. Is integrated and averaged, a current integrated waveform as shown in FIG. 4C is obtained, and sampling becomes possible.

The dimming output monitoring device 20b of this embodiment is characterized in that it uses only the half-wave value of the dimming output of the sawtooth waveform, integrates it, averages it, transmits it, and monitors it in real time. is there.

FIG. 5 is a block diagram showing the overall schematic configuration of the dimming output monitor device 20c according to the third embodiment of the present invention.

The dimming output monitor device 20c includes a voltage detecting circuit 9 for detecting the voltage waveform of the dimming output output by the SCR 1 for phase-controlling the power supply to the lamp load 13.
A reset pulse generation circuit 10 that generates a reset pulse for each cycle of the commercial power supply 14, and a current average value output that converts the voltage waveform detected by the voltage detection circuit 9 into a current waveform and integrates and averages the current value. The circuit 11 and the integrated current average value output by the current average value output circuit 11 are sample-held, the reset pulse generated by the reset pulse generation circuit 10 is input, and the held integrated current average value is output. A sample hold circuit 7 for resetting the integrated current average value, an A / D conversion circuit 15 for A / D converting the output signal from the sample hold circuit 7, and a transmission circuit 16 for transmitting the output of the A / D conversion circuit 15. Consists of.

The output voltage waveform of the commercial power source 14, the dimming output waveform from the SCR 1, the integrated current average value waveform output from the current average value output circuit 11, and the reset pulse generation circuit in the dimming output monitor device 20c of this embodiment. The reset pulse waveform generated at 10 and the sampling waveform by the sample hold circuit are as shown by the curves a, b, c, d, and e in FIG.

Reset pulse generation circuit in this embodiment
Although the reset pulse generated in 10 is generated every one cycle of the commercial power source 14, the reset pulse is generated every half cycle, and the dimming output can be sampled.

As described above, according to the dimming output monitor devices 20a, 20b, 20c of the present embodiment, the dimming output can be converted into effective and average values without using an expensive effective value converter. Since the effective and averaged dimming output data is sampled and transmitted, it is possible to easily and linearly monitor the actual light, which is an effective improvement in terms of mounting and cost. You can

[0029]

As described above with reference to the embodiments,
According to the present invention, the sawtooth dimming output is averaged, sampled, and monitored, so that real-time monitoring is possible.

Particularly, in the dimming output monitor device according to the second aspect, the dimming output waveform is half-wave rectified, and the current value is integrated from the current waveform to obtain the integrated current average value. It's easy.

Further, in the dimming output monitoring device according to the third aspect of the present invention, the average value of the current extracted from the voltage waveform of the sawtooth-shaped dimming output from the dimmer is sample-held, and the commercial power source is cycled for each cycle. By the reset pulse issued, the held current average value is refreshed,
It becomes possible to monitor the dimming output in real time.

The averaging of the dimming outputs described above does not require an expensive effective value converter, and can be configured easily and inexpensively.

[Brief description of drawings]

FIG. 1 is a block diagram of a dimming output monitor device according to a first embodiment.

2A is a dimming output waveform diagram from the SCR of the dimming output monitoring device according to the first embodiment, FIG. 2B is an averaged output from an averaging circuit, and FIG. 2C is an averaged value. The digital transmission waveform diagram of the digitized output, and (d) is the analog transmission waveform diagram of the averaged output.

FIG. 3 is a block configuration diagram of a main part of a dimming output monitor device according to a second embodiment.

4A is a dimming output waveform diagram from the SCR of the dimming output monitoring device of the second embodiment, FIG. 4B is a voltage waveform diagram for one cycle from the half-wave rectifier circuit, and FIG. ) Is a current integral waveform chart by the averaging circuit.

FIG. 5 is a block configuration diagram of a dimming output monitor device according to a third embodiment.

6A is an output voltage waveform diagram from a commercial power source of the dimming output monitoring device of the third embodiment, FIG. 6B is a dimming output waveform diagram from the SCR, and FIG. 6C is a current average value. An integrated current average value waveform diagram from the circuit, (d) is a reset pulse waveform diagram for each cycle from the reset pulse generation circuit, and (e) is a sampling waveform of the sample hold circuit.

[Explanation of symbols]

 1 SCR (dimmer) 2 Averaging circuit 3 A / D conversion circuit 4,16 Digital transmission circuit 5,15 A conversion circuit 6 Analog transmission circuit 7 Sample hold circuit 2a Half-wave rectification circuit 2b Current value conversion circuit 2c Average Conversion circuit 8 LED 9 Voltage detection circuit 10 Reset pulse generation circuit 11 Current average value output circuit 13 Lamp load 14 Commercial power supply

Claims (3)

[Claims] 1. An averaging circuit for averaging a dimming output from a dimmer, and a dimming output data output by the averaging circuit is time-divided and A / D-converted. D conversion circuit, digital transmission circuit for transmitting the digital signal output of the dimming output data output from the A / D conversion circuit, and D for D / A converting the digital signal output transmitted from the digital transmission circuit A dimming output monitor device comprising: an A / A conversion circuit; and a sample hold circuit that samples and holds the analog signal output output from the D / A conversion circuit. 2. The dimming output monitoring device according to claim 1, wherein the averaging for dimming the dimming output from the dimmer is performed by inputting the dimming output from the circuit dimmer. Half-wave rectification circuit that performs half-wave rectification, a current-value conversion circuit that detects the voltage value from the half-wave rectification output by this half-wave rectification circuit, and converts it to a current value, and the current value that this current-value conversion circuit outputs A dimming output monitor device comprising an averaging circuit for integrating and averaging. 3. A voltage detection circuit for detecting a voltage waveform of a dimming output from a dimmer, a reset pulse generation circuit for generating a reset pulse for each cycle of a commercial power supply, and a voltage detected by the voltage detection circuit. A current average value output circuit for converting a waveform into a current waveform and integrating and averaging the current value, and a sample hold of the integrated current average value output by the current average value output circuit, and the reset pulse generating circuit A dimming output monitor device, comprising: a sample-hold circuit that inputs a reset pulse that is generated, outputs the held integrated current average value, and resets the integrated current average value.