JPS62265819A - Rotary dial circuit - Google Patents

Abstract

PURPOSE:To attain minute setting over a wide range by applying N-th power to the rotating speed of a rotary dial (N>2) and adding/subtracting the result accumulatingly so as to obtain a change in response to the rotary speed of the rotary dial. CONSTITUTION:The rotary dial 1, a rotary encoder 2 driven by the dial, a decoder 3 extracting a signal DR representing the direction of revolution of the rotary dial from the output of the rotary encoder, an up-down counter 4 counting the output Pa of the rotary encoder for a prescribed period and subject to up-count or down-count control by a signal DR representing the direction of rotation, an N-th power circuit 6 applying N-th power to teh count output of the up-down counter and an adder/subtrator circuit 7 adding or subtracting accumulatingly the output of the N-th power circuit according to the signal representing the direction of rotatoin are provided. Then the control output in response to the rotating speed of the rotary dial is obtained from the adder/subtractor circuit. Thus, the resolution is changed continuously steplessly in response to the dial rotating speed to improve the operability.

Description

[Detailed description of the invention] [Industrial application field] This invention relates to a rotary dial circuit.

[Summary of the invention]

This invention provides fine control over a wide range by making it possible to obtain a rate of change that corresponds to the rotational speed of the rotating dial when various setting amounts are given using a rotating dial such as the Jeddah dial. This allows it to be set to .

[Conventional technology]

There is a waveform memory type electronic musical instrument called a sampler. This system stores a few seconds of sound in the form of a digital signal in memory, and when playing, the stored digital signal is D/A converted and then played. By performing various types of processing on the signal, it is possible to perform with a different pitch, length, or timbre from the original sound.

In such a sampler, when storing, for example, 5 seconds of input sound is stored, and when playing (editing), the necessary section of the 5 seconds of input sound is extracted with an accuracy of 0.1 msec. Then, a resolution of 50,000 counts is required.

Therefore, when determining the position of the extraction point using a rotary dial such as a shock dial, if you try to cover 5 seconds with 5 rotations of the rotary dial, for example,
10,000 counts are required for each rotation of the rotary dial, but this is almost impossible due to the structure of the rotary encoder.

Furthermore, even if it were possible, the number of counts per rotation angle of the rotary dial would be large, so it would be impossible to operate the rotary dial with a resolution of 1 force count, that is, 0.101 seconds. , it is not feasible.

On the other hand, if the number of counts per rotation of the rotary dial is set to a number that can be output by a rotary encoder, or if the number of counts is set to a number that allows easy positioning at around 0.1 mm seconds, the number of counts per rotation of the rotary dial for 5 seconds becomes The number of revolutions will be high, resulting in poor operability.

Also, Jtlil! Some VTRs with this function use a rotary dial to position the editing point on the tape, but the same problem occurs.

Therefore, conventionally, a resolution changeover switch is provided, and by switching the switch, coarse adjustment and fine adjustment can be performed, or switching can be performed between coarse adjustment and fine adjustment according to the rotational speed.

[Problem that the invention seeks to solve]

However, when using a changeover switch, the changeover switch must also be operated. For example, if you turn the rotary dial while in coarse adjustment mode near the target point, the adjustment will deviate significantly from the target point, and you will have to operate it to return it to its original position. This results in poor operability, as it is difficult to do so.

In addition, in devices that switch between coarse adjustment and fine adjustment according to the rotational speed of a rotary dial, the resolution changes abruptly and discontinuously at the switching point, creating a sense of discomfort and resulting in poor operability. Put it away.

This invention attempts to eliminate the above-mentioned problems. − [Means for solving the problem] By the way, if we consider the case where a human imitates the rotating dial, when the current value of the controlled variable is far away from the bar target value, he tries to turn the dial faster, and when it gets closer. It is a natural human movement to try to turn slowly. Therefore, if the rate of change (sensitivity) is adapted to the speed, compassion can be reflected effectively.

This invention focuses on the above points, and obtains a target setting amount by cumulatively adding and subtracting the rotational speed of the rotary dial to the Nth power (N≧2).

[Effect]

Therefore, a rate of change can be obtained that corresponds to the rotational speed of the rotary dial, and fine settings can be made over a wide range.

〔Example〕

In FIG. 1, fil is a rotary dial, and (2) is a rotary encoder. Although this encoder (2) is not shown, in this example, the dial (1) rotates 9! It is composed of a gear to be moved and two photointerrupters provided at a predetermined angular interval with respect to the gear, and pulses Pa and Pb as shown in FIG. obtained for each given rotation angle,
and a rectangular wave-like pulse Pa that has a phase difference of 90° from each other and whose phase relationship is reversed depending on whether the dial (11) is turned clockwise or counterclockwise.
, Pb are extracted.

Then, this pulse Pa is supplied to the D input of the D flip-flop (3) for decoding, and the pulse pb is supplied to the clock input of the flip-flop (3), so that the Q output of the flip-flop (3) is When the dial is turned clockwise, the signal DR becomes "H" level, and when the dial is turned counterclockwise, the signal DR becomes "L" level, that is, the signal DR indicating the rotation direction of the dial (11) is extracted.

Then, this signal DR is supplied to the count mode input U/D of the up/down counter (4), and the pulse Pa is supplied to the count input of the counter (4). The pulse Pc that goes to L” level every time is the clear input CL of the counter (4).
is supplied to Therefore, the counter (4) counts up (when DR="H") or counts down (when DR="L") the number of pulses PaO in a unit period (period of Pcm "H"). Therefore, the count value is the rotation speed (rotation angular velocity) of dial (1)
will be shown.

A latch is connected to the counter (4), and a pulse P is input to the latch control input of this launch (5).
The count value of the counter (4) immediately before the pulse Pc is supplied and the counter (4) is cleared by the pulse Pc, that is, the data VL indicating the rotational speed of the dial (1) is latched.

Then, this latched rotational speed data VL is supplied to an N-th power circuit (N22), for example, a square circuit (6), and a signal SQ obtained by squaring the signal VL is taken out.
is supplied to the addition/subtraction circuit (7), and this addition/subtraction circuit (7)
The output signal AS of is passed through the latch (8) to the addition/subtraction circuit (7).
), and the direction signal DR is supplied to the addition/subtraction circuit (
7) as a control signal, and addition is performed when DR="H" (rotation of dial (1) clockwise).
Subtraction is performed when R=“L” (rotation of dial (1) is counterclockwise). Further, a pulse Pc is supplied to the latch control force of the latch (8).

Therefore, in the addition/subtraction circuit (7), the signal SQ is either cumulative addition (DR-“H”) or cumulative subtraction K (DR
= "L"), and the signal AS becomes a value obtained by integrating the square of the rotational speed of the dial (1).

Then, this signal As is taken out through the latch (8) and supplied as an address signal to, for example, a memory (not shown), from which the input sound signal for 5 seconds is 0.
．． It is extracted with a resolution of 1ms.

Therefore, the amount of change in the address signal with respect to the rotation of the dial (10) in this case, that is, generally speaking,
The characteristics of the control amount with respect to the rotation direction and rotation speed of the dial (11) are as shown in FIG. 3, and the characteristics of the rate of change of the control amount are as shown in N=2 in FIG.

Furthermore, if the square circuit (6) is replaced by a cube circuit, the rate of change of the control amount will be as shown in N=3 in the figure.

[One result of the invention] Thus, according to the present invention, the rate of change of the control amount with respect to the rotation of the rotary dial fil is adapted to the speed, that is, it is made to correspond to the natural movement of humans.
The operating characteristics are significantly improved.

That is, by turning the dial (1) quickly, control can be performed with coarse resolution, and by turning it slowly, control can be performed with fine resolution and at the same time, fine control can be performed. Also,
Since the resolution changes automatically and steplessly and continuously according to the rotational speed of the dial (1), operability is improved.

According to experiments, when the resolution of the controlled variable is about 100 steps or less, the conventional method (method using signal VL) is sufficient, but when the resolution is about 100 to 10,000 steps, N = 2.When the resolution is 10,000 steps or more, the company =3
was found to be suitable.

Further, signal processing can also be performed by a microcomputer and software, in which case there is no increase in hardware.

[Brief explanation of drawings]

FIG. 1 is a system diagram of an example of the present invention, and FIGS. 2 to 4 are diagrams for explaining the same. (1) is a rotary dial, and (2) is a rotary encoder.

Claims (1)

[Scope of Claims] A rotary dial, a rotary encoder driven by the rotary dial, a decoder that extracts a signal indicating the rotational direction of the rotary dial from the output of the rotary encoder, and a decoder that extracts a signal indicating the rotation direction of the rotary dial from the output of the rotary encoder, and a decoder that outputs the output of the rotary encoder at regular intervals. an up-down counter that is controlled to up-count or down-count by the signal indicating the rotation direction, an N-th power circuit that raises the count output of this up-down counter to the Nth power (N≧2), and this N A rotary dial circuit comprising an adder/subtracter circuit that cumulatively adds or subtracts the output of the multiplier circuit according to a signal indicating the rotation direction, and obtains a control output from the adder/subtracter circuit in accordance with the rotational speed of the rotary dial. .