JPH01156603A - Rotational signal generating device - Google Patents

Abstract

PURPOSE:To generate a rotational signal by using common mechanism parts and without changing its mechanical constitution by outputting selectively a binarization signal related to an intermittent rotation or a continuous rotation in accordance with whether an excitation of an exciting means for generating a holding torque against a rotation of a rotor exists or not. CONSTITUTION:An induced voltage of main coils 2a, 3a of exciting coils 2, 3 is converted to an alternating voltage whose amplitude is roughly constant irrespective of a rotating speed of a rotor which is not shown in the figure by an integrator 1T, binarized by a comparator CP, and pulse signals phiA, phiB are outputted. At the time of obtaining a binarization signal related to an intermittent rotation, auxiliary coils 2b, 3b of the exciting coils 2, 3 by turning ON a switch SW, and a torque for holding a position of the rotor is generated. In this case, when rotational force is given to the rotor from the outside, the intermittent rotation is executed. At the time of obtaining a binarization signal related to a continuous rotation, the auxiliary coils 2b, 3b are brought to non-excitation by turning OFF the switch SW.

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention relates to a rotation signal generating device, and more specifically, the present invention relates to a rotation signal generator that selectively generates a binary signal related to intermittent rotation operation or a binary signal related to continuous rotation operation. The present invention relates to a device that can obtain a binary signal.

(Prior art) Rotation signal generators include those that output signals related to smooth continuous rotation, such as rotary encoders, and those that output signals related to intermittent rotation, such as rotary switches. .

For example, in a recorder, a rotary encoder that outputs a signal related to smooth continuous rotation is used to specify the pen position or set an arbitrary value, whereas the latter is used to change the input range or chart speed. A type of rotary switch that outputs a signal related to intermittent rotational operation is used, such as a rotary switch.

(Problem to be Solved by the Invention) However, according to such a conventional configuration, in order to obtain a signal related to continuous rotation operation and a signal related to intermittent rotation operation, it is necessary to use the corresponding parts. This increases the number of parts and complicates the configuration.

The present invention has focused on these points, and its purpose is to generate signals related to continuous rotation operation or intermittent rotation by electrical control using common mechanical parts and without changing the mechanical configuration. An object of the present invention is to provide a rotation signal generating device that can selectively obtain signals related to operation.

(Means for Solving the Problems) The rotation signal generator of the present invention is a permanent magnet type motor that has two sets of excitation coils consisting of a main coil and an auxiliary coil, and whose rotor rotates in accordance with an externally applied force. And, as the rotor of this motor rotates, the induced voltage output from one wJ magnetic coil of each excitation coil set is 2.
a waveform shaping unit that converts the excitation coil into a value; and an excitation unit that selectively excites the other excitation coil of the excitation coil group to generate a holding torque with respect to rotation of the rotor, the excitation unit generating a value depending on whether or not excitation is performed by the excitation unit. Depending on the binary signal associated with the intermittent rotating motion or the binary signal associated with the continuous rotating motion.
It is characterized by selectively outputting valued signals.

(Example) Embodiments of the present invention will be described in detail below with reference to the drawings.

FIG. 1 is a diagram explaining the principle of a permanent magnet type motor used in the present invention. In Fig. 1, 1 is a rotor made of permanent magnets, which is rotated clockwise (C) by a force applied from the outside.
W) or counterclockwise (CCW). 2.3
are the main coils 2a, 3a and the auxiliary coils 2b, 3b, respectively.
This is an excitation coil made up of an excitation coil which is arranged perpendicular to the rotation center of the rotor 1. In addition, the first
In the figure, each excitation coil 2, 3 has a middle point COM, the coils at the middle point COM and 9A, B are the main coils 2a, 3a, and the coils at the middle point COM and the other ends A, B are auxiliary coils. Coils 2b and 3b are used.

FIG. 2 is a waveform diagram of the induced voltage in the main coils 2a, 3a and auxiliary coils 2b, 3b of each exciting coil 2.3 when the rotor 1 rotates CW or CCW in the motor shown in FIG. The solid line shows the CW induced voltage, and the broken line shows the CCW induced voltage.

As is clear from FIG. 2, the phases of the induced voltages of the main coil 2a and the auxiliary coil 2b of the excitation coil 2 and the main coil 3a and the auxiliary coil 3b of the excitation coil 3 differ by 180 degrees in electrical angle, and The phases of the induced voltages of the main coil 2a of the excitation coil 3 and the main coil 3a of the excitation coil 3 and the auxiliary coil 2b of the excitation coil 2 and the auxiliary coil 3b of the excitation coil 3 differ by 90 degrees in electrical angle. The phase advance and lag are reversed depending on the rotational direction of the rotor 1. These relationships are illustrated in FIG. 3. Note that in FIG. 3, θe is an electrical angle of 90@.

Therefore, by shaping the waveform of each induced voltage in the main coils 2a, 3a or each induced voltage in the auxiliary coils 2b, 3b, binarizing them, and then counting them, the rotation angle and the rotation direction can be determined. That is, if the step angle is θ°, the number of binarized pulses after waveform shaping is 360/(4θ) per rotation for each phase.

FIG. 4 is a circuit diagram showing one embodiment of the present invention. Fourth
In the figure, 4 is an excitation circuit that excites each auxiliary coil 2b, 3b, and is composed of a DC power supply E, a diode D, a transistor Q, resistors R1, R2, and a switch SW. A DC power supply E is connected to the emitter of the transistor Q, an anode of the diode D is connected to the collector of the transistor Q, and a cathode is connected to the emitter of the transistor Q. Further, the collector of the transistor Q is connected to a common potential point via each auxiliary coil 2b, 3b,
The emitter is connected to a common potential point through a series circuit of resistor R1 and switch SW, and the base is connected to the connection point of resistor R1 and switch SW through resistor R2.

5 is a waveform shaping section that binarizes the induced voltage output from the main coil 2a, and 6 is a waveform shaping section that binarizes the induced voltage output from the main coil 3a.
6 is composed of a series circuit of an integrator IT and a comparator CP.

The operation of the device configured in this way will be explained.

The amplitude of the induced voltage in the main coils 2a, 3a of the excitation coils 2, 3 changes depending on the rotation speed, and as the rotation speed decreases, the amplitude becomes smaller. Therefore, an alternating voltage whose amplitude is approximately constant regardless of the rotational speed is obtained by the integrator IT. As a result, it is possible to simultaneously reduce waveform distortion and suppress high-frequency noise. Comparator CP is integrator I
The output voltage of T is received and binarized, and pulse signals φA and φB corresponding to the rotational direction as shown in FIG. 5 are output, respectively.

To obtain a binary signal related to the intermittent rotation operation, the switch SW is turned on to excite the auxiliary coils 2b and 3b of each excitation coil 2.3.

By energizing the auxiliary coils 2b and 3b in this manner, a torque that maintains the position of the rotor 1 is generated. When a rotational force is applied to the rotor 1 from the outside in this state, the rotation of the rotor 1 becomes intermittent rotation with a step angle of 4θ. Also in this case, the main coils 2a and 3a of each excitation coil 2.3
An induced voltage having a phase difference of 90° is generated depending on the angular velocity. Therefore, based on these induced voltages, the rotational speed and rotational direction can be detected as described above.

Note that the value of the excitation current may be adjusted so as to obtain the optimum intermittent torque.

To obtain a binary signal related to continuous rotation operation, the switch SW is turned off to de-energize the auxiliary coils 2b and 3b of each excitation coil 2.3. In this case, only detent torque acts on the rotor 1. This detent torque is sufficiently small for a small permanent magnet type motor, and smooth rotational motion can be obtained.

FIG. 6 is a configuration explanatory diagram showing a specific example of a motor-driven model. In FIG. 6, 7 is a motor as shown in FIG. 1, and 8 is a rotary knob that applies rotational force to the motor 7. These motor 5 and rotary knob 8 are connected via gears 9 and 10. With this configuration, the angular resolution can be arbitrarily set according to the gear ratio. In addition, the rotary knob 8
The switch SW shown in Fig. 4 is constructed so that it can be moved in the axial direction.
By turning on and off, it is possible to switch between the intermittent rotational operation output signal mode and the continuous rotational operation output signal mode.

FIG. 7 is a circuit diagram showing a specific example of the operation sound generating circuit in the intermittent rotation operation output signal mode, and FIG. 8 is a waveform diagram of each part in FIG. 7. In FIG. 7, 11 is a binary signal φA
, φB, a rotation detection pulse generation circuit that outputs a rotation detection pulse S, 12 a damped vibration generator that outputs a damped vibration signal e9 similar to the click sound of a mechanical changeover switch in accordance with the rotation detection pulse S, 13 a damped vibration generator Damped vibration signal e
This is a piezoelectric speaker driven by S. With this configuration, the piezoelectric speaker 13 is driven by the damped vibration signal e9 during intermittent operation, and a good operational feeling can be obtained.

FIG. 9 is a configuration explanatory diagram showing a specific example of a recorder using the present invention. In FIG. 9, 14 is an input terminal for an analog input signal, and a voltage dividing circuit 1 corresponding to the measurement range.
It is connected to the input terminal of 5. Reference numeral 16 denotes a changeover switch for changing the voltage division ratio, and the analog input signal divided into zero voltage, which is switched and controlled by the range setting signal SR applied from the arithmetic control section 19, is applied to the A/D converter via the amplifier 17. After being converted to a digital signal, the arithmetic control unit (
CPU) 19. 20 is an encoder configured as shown in FIG. 6, and an encoder interface 2
1 to the calculation control section 19. Reference numeral 22 denotes a display section, which displays the input range, chart speed setting values, operation mode of the encoder 20, etc. in accordance with the display control signal SD applied from the arithmetic control section 19. Reference numeral 23 denotes a paper feed motor drive circuit, which causes the chart 25 to run by driving and controlling the paper feed motor 24 in accordance with a paper feed control signal SPH applied from the arithmetic control section 19. 26
is a servo control circuit, which rotates the servo motor 27 according to the pen position setting signal SPE applied from the arithmetic control section 19, moves the recording pen 28 to a position according to the value of the analog input signal, and performs analog recording on the chart 25. Have them do it. Note that the servo motor 2 is connected to the servo control circuit 26.
A drive signal DV is applied to 7, and a feedback signal FB corresponding to the position of the recording pen 28 is applied from the servo motor 27 to the servo control circuit 26.

In such a configuration, by setting the operation mode of the encoder 20 to intermittent rotation mode, the input range, chart speed, etc. can be selected and set with the same operation feeling as a conventional changeover switch, and it can be set to continuous rotation mode. This allows you to set the pen movement to a desired position.

That is, by configuring as shown in FIG. 9, one encoder 20 can set various parameters of the recorder and mW.

Although FIG. 9 shows an example in which the present invention is applied to a recorder, it is also effective as an adjustment setting mechanism in various devices.

(Effects of the Invention) As explained above, according to the present invention, signals related to continuous rotation operation or intermittent rotation can be generated by electrical control using a common Rm component and without changing its mechanical configuration. A rotation signal generating device that can selectively obtain signals related to operation can be realized, which has great practical effects.

[Brief explanation of the drawing]

Fig. 1 is an explanatory diagram of the principle of the permanent magnet type motor used in the present invention, Fig. 2 is an induced voltage waveform diagram of the exciting coil of Fig. 1, Fig. 3 is an explanatory diagram of the phase relationship of Fig. 2, and Fig. 4 is a circuit diagram showing one embodiment of the present invention, and FIG. 5 is 217! of FIG. 4. Fig. 6 is a configuration explanatory diagram showing a specific example of the motor drive mechanism, Fig. 7 is a circuit diagram showing a specific example of the operation sound generating circuit in the intermittent rotation operation output signal mode, and Fig. Waveform diagrams of various parts in the figure and FIG. 9 are configuration explanatory diagrams showing a specific example of a recorder using the present invention. DESCRIPTION OF SYMBOLS 1... Rotor, 2.3... Excitation coil, 4... Excitation circuit, 5.6... Waveform shaping part, 7... Motor, 8
... Rotation knob, 9, 10 ... Gear, 11 ... Rotation detection pulse generation circuit, 12 ... Attenuation signal generator, 13
...Piezoelectric speaker. Figure 1 Figure 2 @ 3 Figure B Figure 5 Pavilion Figure 6

Claims (1)

[Claims] A permanent magnet motor having two sets of excitation coils consisting of a main coil and an auxiliary coil, the rotor of which rotates in response to an externally applied force, and each set of excitation coils according to the rotation of the rotor of this motor. a waveform shaping unit that binarizes the induced voltage output from one of the excitation coils, and an excitation unit that selectively excites the other excitation coil of the excitation coil set to generate a holding torque with respect to the rotation of the rotor. and a binary signal associated with the intermittent rotational operation or a binary signal associated with the continuous rotational operation, depending on whether or not the excitation means is energized.
A rotation signal generator characterized by selectively outputting a value signal.