JP3711766B2 - metronome - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a power generator and a metronome using the power generator and a power generator that adjusts the rotational force while performing power generation based on the rotational force of an urging means such as a spring that manually generates a mechanical rotational force. .
[0002]
[Prior art]
As this type of power generation speed control device, one applied to a timepiece has been proposed as described in, for example, JP-A-8-5758.
[0003]
This power generation speed control device uses a mainspring as a driving force, and connects a power generation speed control mechanism composed of a rotor and a stator through a speed increasing wheel train in which large and small gears are combined with the mainspring. By generating power with the power generated and driving the rotation control circuit with the generated power, the rotation control circuit controls the braking force against the power generation speed control mechanism to adjust the speed. This prevents a difference in the rotational speed of the second hand and the like to ensure an accurate rotational speed.
[0004]
[Problems to be solved by the invention]
However, the above-described conventional example is suitable when a constant speed movement is required, such as a watch, but is applied when a tact rod is rotated so as to engrave various tempos, such as a metronome. There is an unresolved issue that cannot be done.
[0005]
There are three types of metronome: mechanical metronome, electromagnetic metronome, and electronic metronome.
[0006]
As a mechanical metronome, for example, as disclosed in Japanese Patent Application Laid-Open No. 5-232254, an escape pin is attached to the lower side of the shaft of the tact rod, and an escape wheel having the same axis is used as a fixed shaft. The escape pin is fixed to the opposite flange surface and the opposite position is shifted by a half pitch. There has been proposed one in which contact is made alternately and the reciprocating motion of the tact rod is continued to obtain a predetermined time signature.
[0007]
As an electromagnetic metronome, for example, as disclosed in Japanese Patent Application Laid-Open No. 6-148355, a tact rod is swung by a drive coil, the position of the tact rod is detected by a reflective photosensor, and the output of the sensor In response to this, there has been proposed one that controls the swing of the tact rod by controlling the voltage applied to the drive coil.
[0008]
As an electronic metronome, for example, as described in Japanese Patent Application Laid-Open No. 6-148355, a tactile rod is driven by a step motor driven by an output pulse using a crystal oscillator. Has been proposed.
[0009]
However, in the mechanical metronome, it is necessary to take into account the torque change of the spring that drives the escape wheel, and to consider the lubrication and wear of each member, and in addition, the escape pin mounting accuracy, the escape pin breakage, There is an unsolved problem that an accurate rhythm cannot be engraved due to various factors such as weight adjustment of the pendulum.
[0010]
In addition, the electromagnetic metronome and the electronic metronome both require a power source such as a battery and have an unsolved problem that it is difficult to reproduce the movement of the pendulum like a mechanical type.
[0011]
SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a power generation governing device capable of rotating at a constant speed at a plurality of different rotational speeds by electrically controlling the rotational speed without requiring a power source such as a battery. .
[0012]
Another object of the present invention is to provide a metronome that can accurately electrically swing the tact rod without requiring a power source such as a battery.
[0013]
[Means for Solving the Problems]
In order to achieve the above object, a power generation governing device according to claim 1 is an urging unit that manually generates a mechanical rotational force, and an induced electric power that is generated when the rotational force from the urging unit is transmitted. In addition, in the power generation speed control device including the power generation speed control means having a speed control function for adjusting the speed to the target rotational speed, the power generation speed control means is configured such that the target rotational speed can be changed. Yes.
[0014]
According to a second aspect of the invention, in the invention according to the first aspect, the target rotational speed is changed by changing an electromagnetic braking force with respect to the rotational force of the urging means. It is a feature.
[0015]
Further, the power generation governing device according to claim 3 is the invention according to claim 1 or 2, wherein the power generation governing means includes a rotation control means of a feedback control system and a reference for varying a reference signal of the rotation control means. And a signal variable means.
[0016]
Still further, in the power generation governing device according to claim 4, in the invention according to claim 3, the rotation control unit includes a rotor to which the rotational force of the urging unit is transmitted and a stator wound with a coil. A speed machine, brake means for controlling the counter electromotive force of the stator coil, and brake control means for controlling the brake means operated by the induced power of the generator governor are provided.
[0017]
Still further, in the power generation governing device according to claim 5, in the invention according to claim 3 or 4, the reference signal varying means is constituted by a voltage varying means for varying the voltage of the reference signal in the rotation control means. It is characterized by that.
[0018]
According to a sixth aspect of the present invention, in the invention according to the third or fourth aspect, the reference signal varying means is composed of voltage varying means for varying the voltage of the reference signal in the rotation control means. It is characterized by.
[0019]
Furthermore, the power generation governing device according to claim 7 is the invention according to claim 5, wherein the variable frequency oscillation means comprises a programmable frequency divider that divides the reference clock signal into a plurality of different frequency division ratios. It is characterized by being.
[0020]
Furthermore, the power generation governing device according to claim 8 is the invention according to claim 5, wherein the variable frequency oscillation means is configured by a programmable multiplier that multiplies a reference clock signal into a plurality of different multiplication ratios. It is a feature.
[0021]
Furthermore, the power generation governing device according to claim 9 is the invention according to claim 5, wherein the frequency variable oscillation means is configured by a voltage / frequency converter that converts a speed command voltage value into a pulse. It is a feature.
[0022]
Still further, according to a tenth aspect of the present invention, in the invention according to the fifth aspect, the variable frequency oscillating means includes a plurality of clock signal generating means for generating reference clock signals having different frequencies, and the plurality of clocks. The clock signal selection means selects any one of the signal generation means.
[0023]
According to an eleventh aspect of the present invention, in the invention according to the fifth aspect, the frequency variable oscillating means includes a frequency variable oscillation circuit based on PLL control and a plurality of frequency divisions of the oscillation output of the frequency variable oscillation circuit. It is characterized by comprising a frequency divider that divides by a ratio and selection means for selecting at least a frequency division signal of the frequency divider.
[0025]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
[0026]
FIG. 1 is a schematic configuration diagram showing a first embodiment when the present invention is applied to a metronome.
[0027]
In the figure, reference numeral 1 denotes a metronome capable of engraving a desired rhythm, wherein a tact rod 3 is attached to a case body 2 so that the lower side of the center in the longitudinal direction is rotatably attached to a fixed shaft 4. 2 is swingably arranged.
[0028]
The tact bar 3 has its upper end locked by a locking claw 2 a formed on the case body 2, so that its rotation is forcibly stopped. A power generation governing device 10 that swings 3 at a desired speed is connected.
[0029]
As shown in FIG. 2, the power generation governing device 10 is an urging means comprising a mainspring 11a, a barrel gear 11b, a barrel complete 11c, and a barrel lid 11d in the same manner as an automatic winding or manual winding mechanism of a normal mechanical timepiece. The barrel 11 is provided.
[0030]
The spring 11a has an outer end fixed to the barrel gear 11b and an inner end fixed to the barrel 11c. The barrel complete 11c is supported by the main plate 12 and the train wheel bridge 13, and is fixed by a square hole screw 15 so as to rotate integrally with the square hole wheel 14.
[0031]
The square wheel 14 is meshed with the coil 16 so as to rotate in the clockwise direction but not in the counterclockwise direction. In addition, since the method of rotating the square hole wheel 14 clockwise and winding the mainspring 11a is the same as the automatic winding or the manual winding mechanism of the mechanical timepiece, the description thereof is omitted.
[0032]
The rotation of the barrel gear 11b is increased to a predetermined speed and transmitted to the second wheel 17 and is increased from the second wheel 17 to a predetermined speed and transmitted to the third wheel 18 to rotate the third wheel 18. The crank mechanism 19 attached to the shaft 18 a is connected to the lower end of the tact bar 3, and the rotational movement of the third wheel 18 is converted into the rotational movement of the tact bar 3.
[0033]
The rotation of the third wheel & pinion 18 is increased to a predetermined multiple and transmitted to the rotor 21 of the generator governor 20 constituting the generator governor.
[0034]
The generator governor 20 includes a rotor 21 and a stator 22. The rotor 21 includes a rotor magnet 21a, a rotor pinion 21b, and a rotor inertia disc 21c formed in a plurality of poles of two or more poles. The rotor inertia disc 21c is for reducing the rotational speed fluctuation of the rotor 21 with respect to the driving torque fluctuation from the barrel complete 11. The stator 22 is configured by winding a stator coil 22b of 150,000 turns, for example, around a stator body 22a made of a high permeability magnetic material such as PC permalloy.
[0035]
As shown in FIG. 3, the generator governor 20 has a braking resistor 23A and an enhancement type N-channel MOS field effect transistor 23B as a switching element connected in series with the stator coil 22b. A brake circuit 23 as a means is connected.
[0036]
The generator governor 20 and the brake circuit 23 constitute a voltage controlled oscillator (VCO) 25. In addition to the braking resistor 23A, a diode may be appropriately inserted into the brake circuit 23. When the resistance value of the stator coil 22b of the generator governor 20 is large, the braking resistor 23A can be omitted.
[0037]
The voltage control oscillator 25 is connected to a rotation control device 30 as a rotation speed control means that exhibits a speed adjusting function.
[0038]
As shown in FIG. 3, the rotation control device 30 includes a rectifier circuit 31 that performs half-wave rectification with, for example, a diode connected to a connection point between the stator coil 22 b and the drain of the field effect transistor 23 B; The power supply circuit 34 includes a charging capacitor 32 to which a rectified output is supplied, and a constant voltage circuit 33 to which a terminal voltage of the charging capacitor 32 is supplied to make the voltage constant to a predetermined voltage. The voltage across the capacitor 32 is supplied as an operating voltage to a braking control circuit 40 as braking control means for controlling the brake circuit 23.
[0039]
Here, a boosting chopper circuit is configured by the charging capacitor 32, the stator coil 22b, and the field effect transistor 23B, and a voltage higher than the induced voltage of the stator coil 22b is supplied to the charging capacitor 32 and the braking control circuit 40.
[0040]
As shown in FIG. 3, the braking control circuit 40 includes a variable resistor 41 to which the constant voltage output from the constant voltage circuit 33 is supplied, a triangular wave generation circuit 42 that generates a triangular wave signal Vt that is continuous at a predetermined period, A pulse width modulation circuit including a comparator 43 in which the output voltage of the slider 41a of the variable resistor 41 is supplied to one input side and the triangular wave signal Vt from the triangular wave generation circuit 42 is input to the other input side. The brake control signal BS having a duty ratio corresponding to the voltage selected by the slider 41a of the variable resistor 41 is output from the comparator 43 and supplied to the base of the field effect transistor 23B of the brake circuit 23. Is done.
[0041]
Here, the resistance value of the variable resistor 41 is, for example, about 95% of the constant voltage Vc supplied from the constant voltage circuit 33 when the slider 41a is used as the end portion on the constant voltage circuit 33 side. The voltage gradually decreases as the child 41a is slid to the opposite side, and is set to be, for example, about 10% of the constant voltage Vc when the opposite end is formed. The tempo number for 1 minute is set by the sliding position of the slider 41a.
[0042]
Next, the operation of the first embodiment will be described.
[0043]
Now, it is assumed that the mainspring 11a is wound up, and that the tact bar 3 is locked by the locking claw 2a and its rotation is stopped.
[0044]
In this stopped state, because the tact rod 3 is locked, the crank mechanism 19, the third wheel 18 and the second wheel 17 connected thereto are also stopped, and the mainspring 11a is not released. Since the rotor 21 of the generator governor 20 is also stopped, no voltage is induced in the stator coil 22b wound around the stator 22, and the charging capacitor 32 is in a discharged state. The braking control circuit 40 is in an inoperative state.
[0045]
In this stopped state, the slider 41a of the variable resistor 41 is used as an end portion on the constant voltage circuit 33 side, and a fast tempo number is set. In this state, the tact rod 3 is detached from the locking claw 2a of the case body 2. In the pivotable state, the rotational force of the mainspring 11a is accelerated and transmitted to the third wheel 18 via the second wheel 17 and is transmitted from the third wheel 18 via the crank mechanism 19 to the lower end side of the tact rod 3. Is transmitted to.
[0046]
For this reason, the tact rod 3 is reciprocated once during one rotation of the third wheel & pinion 18 and engraves the tempo.
[0047]
At this time, since the rotor 21 of the generator governor 20 is rotated at a high speed in accordance with the rotation of the third wheel & pinion 18, an induced voltage is generated in the stator coil 22b, and this is generated in the charging capacitor 32 via the rectifier circuit 31. When supplied, the charging capacitor 32 is rapidly charged, and the terminal voltage is supplied to the constant voltage circuit 33, whereby the braking control circuit 40 is activated.
[0048]
Therefore, the rotational speed command voltage Vv in which the slider 41a of the variable resistor 41 is set to a relatively high voltage of about 95% of the constant voltage Vc of the constant voltage circuit 33 is input to the comparator 43. Since the triangular wave signal Vt from the triangular wave generating circuit 42 is inputted to the other input side of 43, a brake with a small duty ratio that is turned on when the target speed command voltage Vv is lower than the triangular wave signal Vt from the comparator 43. A control signal BS is output and supplied to the base of the field effect transistor 23B of the brake circuit 23.
[0049]
For this reason, the field effect transistor 23B is turned on in a section where the brake control signal BS is on, and a short-circuit current flows through the stator coil 22b of the power generator 20 to generate an electromagnetic braking force. Acts on the third wheel 18, the third wheel 18 is decelerated, and the tact rod 3 is driven to swing at a large tempo in response to this.
[0050]
When changing the tempo number in a small direction in the swing driving state of the tact bar 3, by sliding the slider 41a of the variable resistor 41 to the sliding position corresponding to the set tempo number, By reducing the target speed command voltage Vv and increasing the duty ratio of the brake control signal BS output from the comparator 43, thereby increasing the short-circuit current amount of the stator coil 22b in the brake circuit 23, the target speed command voltage Vv is increased. By generating an electromagnetic braking force, the rotational speed of the third wheel & pinion 18 is decreased, and the rotational speed of the tact bar 3 is decreased accordingly to decrease the tempo number.
[0051]
In order to stop the tact bar 3 from the swinging state of the tact bar 3, the tact bar 3 is rotated by holding the tact bar 3 by hand and locking it with the locking claw 2 a of the case body 2. The rotation of the second wheel 17 and the third wheel 18 is stopped by this, so that the power generation by the generator governor 20 is stopped.
[0052]
On the other hand, in the braking control circuit 40, when the charging voltage of the charging capacitor 32 in the power supply circuit 34 is discharged and the voltage output from the constant voltage circuit 33 falls below the operating voltage in the braking control circuit 40, this braking control is performed. The circuit 40 returns to the inactive state.
[0053]
As described above, in the first embodiment, the brake control is performed by changing the target speed command voltage Vv by selecting the sliding position of the slider 41a of the variable resistor 41 in the braking control circuit 40. By changing the duty ratio of the signal BS and changing the electromagnetic braking force generated by the brake circuit 23, the rotation speed of the tact bar 3 can be changed, and the tempo number can be arbitrarily changed.
[0054]
Next, a second embodiment of the present invention will be described with reference to FIG.
[0055]
In the second embodiment, the rotation speed of the tact bar 3 is controlled more accurately.
[0056]
That is, in the second embodiment, as shown in FIG. 4, the braking control circuit 40 generates a pulse signal generation circuit 51 that generates a pulse signal having a predetermined frequency, and a pulse signal generated by the pulse signal generation circuit 51 in a desired amount. Programmable frequency divider 52 serving as a frequency variable oscillation means that divides by a frequency ratio and outputs it as target speed pulse signal Pv, and induction between stator coil 22b and field effect transistor 23B of generator governor 20 on the non-inverting input side When the voltage is supplied and the reference voltage Vref is supplied to the inverting input side and the induced voltage is equal to or higher than the reference voltage Vref, it becomes high level and outputs the rotation detection pulse signal Pr having the same cycle as the induced voltage of the generator. The target speed pulse signal Pv of the comparator 53 as the rotation detection means of the machine 20 and the programmable frequency divider 52 is the down terminal t. _D Further, the rotation detection pulse signal Pr of the comparator 53 is connected to the up terminal t. _U From the D / A converter 55, the D / A converter 55 for D / A converting the count output N of the up / down counter 54, and the D / A converter 55. The amplifier 56 is configured to multiply the output analog voltage by the control gain, and the amplified output of the amplifier 56 is input, and based on this, the brake control circuit 57 that controls on / off of the field effect transistor 23B of the brake circuit 23 is configured. ing.
[0057]
The programmable frequency divider 52 is composed of, for example, a programmable N-ary counter, and has 4-bit data input terminals. For example, setting data from a tempo number setting switch 52a provided in the case body 2 is input to these data input terminals. By inputting, the frequency division ratio n is set by the combination of the selected data input terminals, and the frequency ratio (1 / n) is determined. A target speed pulse signal obtained by dividing the pulse signal of the pulse signal generation circuit 51 by the set division ratio is output. At this time, the frequency of the target speed pulse signal Pv set to the highest frequency division ratio is set so as to drive the tact rod 3 at the minimum tempo number, and the target speed pulse signal set to the lowest frequency division ratio is set. The frequency of Pv is set to drive the tact bar 3 at the maximum tempo number. Here, the tempo number setting switch 52a has, for example, a slide switch configuration having a plurality of selection positions, and is configured to select the selection position by sliding the operation lever 52b, for example, from the left selection position to the right side. Setting data is output so that the frequency division ratio of the programmable frequency divider 52 decreases as the selected position is reached, and the tempo number is set to increase sequentially.
[0058]
The comparator 53 is configured to receive the output waveform from the voltage controlled oscillator 25 with high impedance so as not to affect the generator governor 20.
[0059]
Further, the brake control circuit 57 is supplied with a triangular wave signal generating circuit 58 for generating a triangular wave signal, a triangular wave signal of the triangular wave signal generating circuit 58 is supplied to one input side, and an amplified output of the amplifier 56 is supplied to the other input side. When the triangular wave signal from the comparator 59 is lower than the amplified output, the comparator 59 is turned on, and vice versa, the amplified output is high. A brake control signal BS having a large duty ratio when the voltage is low and a small duty ratio when the voltage is low is supplied to the field effect transistor 23B of the brake circuit 23.
[0060]
Next, the operation of the second embodiment will be described.
[0061]
In the state where the tact rod 3 is locked to the locking claw 2a of the case body 2, since the generator governor 20 does not generate power as in the first embodiment, the charging capacitor 32 of the power circuit 34 is in a discharged state. Thus, the braking control circuit 40 is inactive, and the field effect transistor 23B of the brake circuit 23 is also off.
[0062]
By releasing the tact rod 3 from the locking claw 2a from this stop state and making it swingable, the releasing force of the mainspring 11a is tacted via the second wheel 17 and third wheel 18 via the crank mechanism 19. By being transmitted to the bar 3, the tact bar 3 is reciprocally rotated.
[0063]
At this time, as the third wheel 18 rotates, the rotor 21 of the generator governor 20 rotates, so that an induced voltage is generated from the stator coil 22b. The induced voltage is rectified by the rectifier circuit 31 and charged by the charging capacitor 32. To charge this quickly.
[0064]
Then, when the constant voltage circuit 33 enters a state in which a constant voltage is generated so that the braking control circuit 40 is in a stable operation state, the braking control circuit 40 is in an operation state, and the pulse signal generation circuit 51 outputs a pulse signal having a predetermined frequency. Is supplied to the programmable frequency divider 52, and the target speed pulse signal Pv obtained by dividing the pulse signal by the programmable frequency divider 52 to the desired frequency division ratio set by the tempo number setting switch 52a is supplied to the up / down counter 54. Down terminal t _D To be supplied.
[0065]
On the other hand, the induced voltage of the stator coil 22b of the generator governor 20 is supplied to the comparator 53. When the induced voltage becomes higher than the reference voltage Vref from the comparator 53, it becomes high level and has the same cycle as the induced voltage of the generator. The rotation detection pulse signal Pr is an up terminal t of the up / down counter 54. _U To be supplied.
[0066]
At this time, when the tempo number setting switch 52a is operated to set the division ratio of the programmable frequency divider 52 to a large value in order to obtain a small tempo number, the frequency of the target speed pulse signal Pv becomes low. When the frequency of the rotation detection pulse signal Pr input from the comparator 53 is high, the count value N of the up / down counter 54 increases according to the difference in the number of both pulses, and this is converted into an analog voltage by the D / A converter 55. Then, the control gain is multiplied by the amplifier 56 and supplied to the brake control circuit 57, so that the brake control signal BS having a large duty ratio is output from the brake control circuit 57 to the field effect transistor 23B of the brake circuit 23.
[0067]
For this reason, the section in which the field effect transistor 23B is turned on is lengthened, the short-circuit current of the stator coil 22b is increased, a large electromagnetic braking force is generated, and the rotation of the rotor 21 is suppressed. Control is performed so that the frequency of the rotation detection pulse signal Pr output from 53 decreases and matches the target speed pulse signal Pv output from the programmable frequency divider 52.
[0068]
Then, by suppressing the rotation of the rotor 21, the rotation speed of the third wheel & pinion 18 is decreased, the tempo number of the tact rod 3 is decreased, and the small tempo number set by the tempo number setting switch 52a is accurately set. Engraved.
[0069]
As described above, according to the second embodiment, since the rotational speed of the rotor, that is, the oscillation cycle of the tact rod 3 is detected and fed back, the tact rod 3 is controlled regardless of the change in the releasing force of the mainspring 11a. The tempo number can be precisely matched with the set tempo number and can be controlled with high accuracy.
[0070]
In the second embodiment, the case where the programmable frequency divider 52 is applied as the variable frequency oscillation means has been described. However, the present invention is not limited to this, and as shown in FIG. Is supplied to a voltage / frequency converter 62 that converts the output voltage of the slider 61a of the variable resistor 61 to a pulse signal having a frequency corresponding to the voltage to the slide of the variable resistor 61. A pulse signal having a frequency corresponding to the speed command voltage Vv selected by the child 61a may be obtained and supplied to the up / down counter 54 as the target speed pulse signal Pv. Similarly to the embodiment, by sliding the slider 61a of the variable resistor 61, the frequency of the target speed pulse signal Pv can be changed and the tempo number of the tact bar 3 can be changed. .
[0071]
As another frequency variable oscillation means, as shown in FIG. 6, a plurality of reference clock oscillation circuits CL for generating a pulse signal having a frequency corresponding to a desired number of tempos. ₁ , CL ₂ …… CL _N Prepare these reference clock oscillation circuits CL ₁ ~ CL _N The reference clock signal is supplied to the selector 65, and one of the reference clock signals is selected by the selector 65 based on the selection signal input from the tempo number setting switch 66 and supplied to the up / down counter 54. You may do it.
[0072]
Further, as another frequency variable oscillation means, as shown in FIG. 7, the other one of the phase comparators 84 in which, for example, a 1 Hz reference clock signal output from the reference clock signal generation circuit 83 is input to one input terminal. A 1 Hz frequency-divided pulse signal output from the frequency divider 85 is input to the input terminal, and the phase difference signal output from the phase comparator 84 is integrated by a low-pass filter 86 to be converted into a direct current. Is amplified and supplied to a voltage controlled oscillator (VCO) 88 to obtain a pulse signal of, for example, 64 Hz, this pulse signal is supplied to a frequency divider 85, and sequentially divided into half the frequency. By selecting the output pulse of 64 Hz and the pulse signal of 32 Hz, 16 Hz, 8 Hz, 4 Hz, 2 Hz, and 1 Hz divided by the frequency divider 85, the selector 89 selects the target speed. May be formed a pulse signal Pv, in this case, it is possible to obtain a target speed pulse signal Pv frequency higher than the reference clock signal.
[0073]
Furthermore, as another frequency variable oscillation means, as shown in FIG. 8, a reference clock signal generation circuit 91 for generating a pulse signal having a relatively low frequency is provided, and a reference output from the reference clock signal generation circuit 91 is provided. A clock signal is supplied to the programmable multiplier 92, and a target speed pulse signal Pv corresponding to the tempo number set by operating the operation lever 93a of the tempo number setting switch 93 from the programmable multiplier 92 is obtained. The up / down counter 54 may be supplied.
[0074]
In the second embodiment, the case where the braking control circuit 40 compares the frequencies of the target speed pulse signal Pv and the rotation detection pulse signal Pr has been described. However, the present invention is not limited to this. , The rotation detection pulse signal Pr output from the comparator 53 is supplied to the one-shot circuit 95 to generate a pulse signal having a predetermined width at the rising edge of the rotation detection pulse signal Pr, and the frequency is converted into a voltage. The speed command voltage Vv output from the slider 97a of the variable resistor 97 supplied to the frequency / voltage (F / V) converter 96 and supplied with the rotation detection voltage Vr and the constant voltage of the constant voltage circuit 33. May be supplied to the differential amplifier 98, and the difference voltage output from the differential amplifier 98 may be supplied to the brake control circuit 57. It is possible to obtain the same effect.
[0075]
Furthermore, in the said 1st and 2nd embodiment, although the case where it was set as the structure which generate | occur | produces a single phase induced voltage was demonstrated as the generator governor 20, it is not limited to this, It shows in FIG. As described above, a brushless motor in which three-phase exciting coils U, V, and W are star-connected is applied, and induced voltages generated from these exciting coils U, V, and W are changed to six diodes D. _U1 ~ D _W2 Is supplied to the diode bridge circuit 100, and the rectified output is supplied to the charging capacitor 32, and between the excitation coil U, V, W of each phase and the diode bridge circuit 100 and the ground. A brake circuit 102 is formed by inserting enhancement type N-channel MOS field effect transistors 101U, 101V, and 101W in between, and an induced voltage obtained from each excitation coil U to W is supplied to the comparators 103U to 103W, When the induced voltage is equal to or higher than the reference voltage Vref, the rotation detection pulse signals Prv to Prw having the same cycle as the induced voltage of the generator are obtained, and these are supplied to the up / down counter 54 via the OR circuit 104. The brake control signal BS of the brake control circuit 57 is sent to each field effect transistor of the brake circuit 102. Star 101U, 101V, may be braking control is supplied to the gate of 101W.
[0076]
In this case, the brake circuit 102 is not limited to the above configuration, and the diode D of the lower arm of the diode bridge circuit 100 as shown in FIG. _U2 , D _V2 And D _W2 In parallel with the switching element Q such as a switching transistor _U2 , Q _V2 And Q _W2 Or upper arm diode D, not shown _U2 , D _V2 And D _W2 A switching circuit is connected in parallel to form a brake circuit, and each switching element Q _U2 ~ Q _W2 May be supplied with the brake control signal BS from the brake control circuit 57, and further, all the diodes D of the diode bridge circuit 100 may be supplied. _U1 ~ D _W2 A switching circuit is connected in parallel to form a brake circuit, and each switching element is individually controlled according to the phase of the induced voltage generated by each exciting coil, and the charging capacitor 32 is discharged via the brake circuit. You may control braking so that it may not be in a state.
[0077]
In the first and second embodiments, the case where the comparator 43 and the brake control circuit 57 perform duty control on the field effect transistor 23B of the brake circuit 23 has been described. However, the present invention is not limited to this. The braking force may be controlled by controlling the voltage applied to the gate of the effect transistor 23B to control the short-circuit current amount of the stator coil 22b.
[0078]
Furthermore, in the said 1st and 2nd embodiment, although the case where the releasing force of the mainspring 11a was transmitted to the generator governor 20 via a speed increasing wheel train was demonstrated, the rotor diameter of the generator governor 20 is changed. If it can be increased, the speed-up wheel train can be omitted.
[0079]
In the first and second embodiments described above, the brake circuit 23 controls the short-circuit current of the stator coil 22b to generate the braking force. However, the present invention is not limited to this. A brake control signal from the control circuit 57 can be supplied to an electromagnet facing the rotor 21 to generate a braking force by an electromagnetic force.
[0080]
Further, in the first and second embodiments, the case where the crank mechanism 19 transmits the rotational force to the tact bar 3 has been described. However, the present invention is not limited to this, and the tact bar using a cam is used. 3 may be driven to swing. Further, a pin is protruded from the third wheel & pinion 18, and this pin is engaged with an elongated hole formed in the tact bar 3 to swing the tact bar 3. Alternatively, a mechanism for converting any other rotational force into a swinging force can be applied.
[0081]
In the first and second embodiments, the case where the power generation governor is applied to the metronome 1 has been described. However, the present invention is not limited to this, and an infusion supply device that supplies an infusion to the human body, The power generation governing device according to the present invention can be applied to other devices that are driven at a constant speed at different rotational speeds.
[0082]
【The invention's effect】
As described above, according to the first aspect of the present invention, the urging means for manually generating the mechanical rotational force, the rotational force from the urging means is transmitted to generate the induced electric power, and the target In the power generation speed control device comprising the power generation speed control means having a speed control function for adjusting the rotational speed, the power generation speed control means is configured such that the target rotational speed can be changed. It is possible to adjust the speed to an arbitrary target rotation speed, and it can be easily applied to devices that adjust the speed at different rotation speeds such as a metronome, and without using a power source that is a consumable item such as a battery. Since the speed can be adjusted automatically, there is an effect that accurate speed control can be performed.
[0083]
According to the second aspect of the present invention, the target rotational speed is changed by changing the electromagnetic braking force with respect to the rotational force of the urging means. There is no need to provide a separate means, and the entire configuration can be easily reduced in size.
[0084]
Further, according to the invention according to claim 3, the power generation speed adjusting means includes the rotation control means of the feedback control system and the reference signal variable means for changing the reference signal of the rotation control means. The effect is obtained that the rotational speed of the speed control means can be accurately controlled to different speeds.
[0085]
Furthermore, according to the invention according to claim 4, the rotation control means includes a rotor to which the rotational force of the urging means is transmitted and a stator having a coil wound thereon, and a reverse of the stator coil. Since the brake means for controlling the electromotive force and the brake control means for controlling the brake means operated by the induced electric power of the generator governor are provided, the brake control means does not require a power source such as a battery. Thus, by electrically controlling the brake means, it is possible to obtain an effect that a highly accurate speed control function can be exhibited.
[0086]
Still further, according to the invention of claim 5, since the reference signal variable means is composed of frequency variable oscillation means for changing the frequency of the reference signal in the rotation control means, a programmable frequency divider or the like is applied. Thus, it is possible to easily form a target speed pulse signal having an arbitrary frequency and to reduce the influence of voltage fluctuation.
[0087]
According to the invention of claim 6, since the reference signal varying means is constituted by voltage varying means for varying the voltage of the reference signal in the rotation control means, simple voltage varying means such as a variable resistor. Thus, the effect that the target speed command voltage can be formed is obtained.
[0088]
Further, according to the invention of claim 7, since the variable frequency oscillation means is composed of a programmable frequency divider that divides the reference clock signal into a plurality of different frequency division ratios, The desired pulse period can be easily set from the high frequency reference signal.
[0089]
Furthermore, according to the invention of claim 8, since the variable frequency oscillation means is composed of a programmable multiplier that multiplies the reference clock signal into a plurality of different multiplication ratios, An effect that a desired pulse period can be easily set is obtained.
[0090]
Still further, according to the invention of claim 9, since the variable frequency oscillation means is composed of a voltage / frequency converter that converts a speed command voltage value into a pulse, a target speed pulse signal of a desired frequency can be easily obtained. The effect that it can be generated is obtained.
[0091]
According to a tenth aspect of the present invention, the variable frequency oscillating means selects a plurality of clock signal generating means for generating reference clock signals having different frequencies and any one of the plurality of clock signal generating means. Therefore, it is possible to reliably generate a desired reference clock signal.
[0092]
According to an eleventh aspect of the present invention, the frequency variable oscillation means includes a frequency variable oscillation circuit based on PLL control, and a frequency divider that divides the oscillation output of the frequency variable oscillation circuit by a plurality of frequency division ratios. Since it comprises at least the selection means for selecting the frequency-divided signal of the frequency divider, the effect that the target speed pulse signal can be generated with high accuracy is obtained.
[Brief description of the drawings]
FIG. 1 is a schematic configuration diagram showing a first embodiment when the present invention is applied to a metronome.
FIG. 2 is a cross-sectional view showing a mainspring mechanism.
FIG. 3 is a block diagram showing a rotation control device in the first embodiment.
FIG. 4 is a block diagram showing a rotation control device in a second embodiment of the present invention.
FIG. 5 is a block diagram showing another first example of the braking control circuit according to the second embodiment.
FIG. 6 is a block diagram showing another second example of the braking control circuit according to the second embodiment.
FIG. 7 is a block diagram showing another third example of the braking control circuit according to the second embodiment.
FIG. 8 is a block diagram showing another fourth example of the braking control circuit according to the second embodiment.
FIG. 9 is a block diagram showing another fifth example of the braking control circuit according to the second embodiment.
FIG. 10 is a block diagram showing another fifth example of the braking control circuit according to the second embodiment.
FIG. 11 is a block diagram showing another sixth example of the braking control circuit according to the second embodiment.
[Explanation of symbols]
1 Metronome
2 Case body
3 Tact stick
10 Power generation governor
11a Spring (energizing means)
19 Crank mechanism
20 Power generator governor (power generator governor)
21 Rotor
22 Stator
22b Stator coil
23 Brake circuit
23B Field Effect Transistor
30 Rotation control device
31 Rectifier circuit
32 Capacitor for charging
33 Constant voltage circuit
34 Power supply circuit
40 Braking control circuit
41 Variable resistor
42 Triangular wave generator
43 comparator
51 Crystal resonator
52 Programmable frequency divider
53 Comparator
54 Up / Down Counter
57 Brake control circuit
61 Variable resistor
62 Voltage / frequency converter
CL ₁ ~ CL _N Reference clock oscillator
65 selector
66 Tempo number setting switch
83 Reference clock signal generation circuit
84 Phase comparator
85 divider
86 Low-pass filter
87 DC amplifier
88 Voltage controlled oscillator (VCO)
91 Reference clock signal generation circuit
92 Programmable multiplier
95 One-shot circuit
96 Frequency / Voltage (F / V) Converter
97 Variable resistor
98 Differential Amplifier
100 Diode bridge circuit
101U to 101W field effect transistor
102 Brake circuit
103U to 103W comparator
104 OR circuit

Claims (11)

  A metronome that swings and drives a tact rod. The biasing means that manually generates a mechanical rotational force, the rotational force from the biasing means is transmitted to generate an induced electric power, and the target rotational speed is adjusted. A power generation speed control device including a power generation speed control means having a speed control function, and the power generation speed control means is configured such that a target rotational speed can be changed. A metronome characterized by the use of   2. The metronome according to claim 1, wherein the target rotational speed is changed by changing an electromagnetic braking force with respect to a rotational force of the urging means.   The metronome according to claim 1, wherein the power generation speed adjusting unit includes a rotation control unit of a feedback control system and a reference signal variable unit that varies a reference signal of the rotation control unit.   The rotation control means includes a generator governor having a rotor and a coil wound with a rotor to which the rotational force of the urging means is transmitted, a brake means for controlling a counter electromotive force of the stator coil, and the power generator governor. The metronome according to claim 3, further comprising a braking control unit that is operated by an induced electric power of the machine and controls the braking unit.   5. The metronome according to claim 3, wherein the reference signal varying means is constituted by a frequency variable oscillating means for varying the frequency of the reference signal in the rotation control means.   5. The metronome according to claim 3, wherein the reference signal varying unit is configured by a voltage varying unit that varies the voltage of the reference signal in the rotation control unit.   6. The metronome according to claim 5, wherein the variable frequency oscillating means comprises a programmable frequency divider that divides the reference clock signal into a plurality of different frequency division ratios.   6. The metronome according to claim 5, wherein the variable frequency oscillating means comprises a programmable multiplier that multiplies a reference clock signal into a plurality of different multiplication ratios.   6. The metronome according to claim 5, wherein the variable frequency oscillating means comprises a voltage / frequency converter that converts a speed command voltage value into a pulse.   The frequency variable oscillating means includes a plurality of clock signal generating means for generating reference clock signals having different frequencies and a clock signal selecting means for selecting any one of the plurality of clock signal generating means. The metronome according to claim 5.   The frequency variable oscillation means selects a frequency variable oscillation circuit under PLL control, a frequency divider that divides the oscillation output of the frequency variable oscillation circuit by a plurality of frequency division ratios, and at least a frequency division signal of the frequency divider 6. The metronome according to claim 5, wherein the metronome is configured with a selection means.

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