JP2001305242A - Electronically controlled mechanical clock and control method therefor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an electronically controlled mechanical clock having high- speed response in speed governing control, and allowing reduction in a cost. SOLUTION: This electrically controlled mechanical clock has a power generator 20 converting mechanical energy transmitted from a spiral spring 1a through a wheel train and supplying electric energy; hands connected to the wheel train; and a rotation control means 50 driven by the electric energy, controlling a rotation period of the power generator 20. The rotation control means 50 has a rotation detection circuit 53 outputting a rotation detection signal FG1 of the power generator 20, a reference signal generation means generating a reference signal fs, a first count means 54A and a second count means 54B counting the reference signal fs and the rotation detection signal FG1, and a brake control circuit 55 executing control such that the brake control circuit 55 which applies a brake to the power generator 20 when a first count value is smaller than a second count value and does not apply a brake to the generator 20 when the first count value is larger than the second count value.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for converting the mechanical energy of a mechanical energy source such as a mainspring into electrical energy by a generator, and operating the rotation control means by the electrical energy to thereby control the rotation cycle of the generator. The present invention relates to an electronically controlled mechanical timepiece that accurately drives a pointer fixed to a wheel train by controlling the time, and a control method therefor.

[0002]

2. Description of the Related Art By converting mechanical energy when a mainspring is opened into electric energy by a generator and operating a rotation control means by the electric energy to control a current value flowing through a coil of the generator, An electronically controlled mechanical timepiece that accurately drives the hands fixed to the wheel train and displays the time accurately is disclosed in Japanese Examined Patent Publication No.
What is described in -50186 is known.

[0003] Japanese Patent Publication No. Hei 7-119812 discloses an angle range in which the brake is turned off and the rotation speed of the rotor is increased to increase the power generation amount during one rotation of the rotor, that is, every period of the reference signal. An angle range in which the brake is applied and turned at a low speed is provided, and the speed is adjusted so as to compensate for a decrease in the generated power during braking while improving the generated power while the rotation speed is high.

[0004] Japanese Patent Application Laid-Open No. 8-50186 discloses a technique in which a reference pulse and a measurement pulse detected with the rotation of a rotor are counted, and the number of reference pulses is compared with the number of measurement pulses. In the first state in which the number of reference pulses is smaller than the number of measurement pulses, the control means generates a brake signal having a pulse width set in response to the measurement pulse to perform brake control.

[0005]

However, the motor described in Japanese Patent Publication No. Hei 7-119812 has one rotor.
Since the brake ON control and the brake OFF control are always performed during rotation, that is, for each reference signal, the rotation control amount of the rotor for each reference signal is particularly high when the generator starts up or the control is greatly deviated. Cannot be made so large, it takes time to shift to a normal control state, and the response is low.

[0006] Also, the brake signal generated for each reference signal has a constant pulse width, and the brake signal generated for each reference signal is also fixed even when control is largely deviated. The amount remains constant, it takes time to shift to a normal control state, and there is a problem that responsiveness is low.

Furthermore, in addition to a circuit for detecting the first and second states by counting and comparing the reference pulse and the measurement pulse, a control for generating a brake signal having a pulse width set in response to the measurement pulse It is necessary to separately provide means, and there is a problem that the configuration is complicated and the cost is high.

SUMMARY OF THE INVENTION An object of the present invention is to provide an electronically controlled mechanical timepiece capable of quick response of speed control and reducing costs, and a control method thereof.

[0009]

SUMMARY OF THE INVENTION An electronically controlled mechanical timepiece according to the present invention is driven by a mechanical energy source and the mechanical energy source connected via a train so as to generate an induced electric power. An electronically controlled mechanical timepiece comprising: a generator that supplies energy; a pointer coupled to the wheel train; and rotation control means driven by the electric energy to control a rotation cycle of the generator. Control means for detecting a rotation cycle of the generator and outputting a rotation detection signal corresponding to the rotation cycle; reference signal generation means for generating a reference signal based on a signal from a time standard source; First counting means for counting a reference signal from the reference signal generating means, second counting means for counting a rotation detection signal from the rotation detecting means, and counting by the first counting means. When the first count value is smaller than the second count value counted by the second counting means, the generator is braked, and when the first count value is equal to or greater than the second count value, the generator is braked. And braking control means for performing control not to apply a brake.

In the electronically controlled mechanical timepiece of the present invention, the pointer and the generator are driven by a mechanical energy source such as a mainspring, and the generator is braked by the braking control means of the rotation control means to thereby control the rotation of the rotor, that is, the pointer. Adjust the speed.

At this time, the rotation control means of the generator counts the reference signal from the reference signal generation means by the first counting means and counts the rotation detection signal from the rotation detection means by the second counting means. The first count value and the second count value are compared. When the first count value is smaller than the second count value, the generator is braked, and the first count value is equal to or greater than the second count value. Then, the rotation speed of the generator is regulated by the brake control means performing control not to apply a brake to the generator.

Therefore, when the state where the first count value is smaller than the second count value continues, that is, when the torque of the mechanical energy source such as the mainspring is large and the rotation of the generator is advanced. In this case, since the brake is continuously applied until the difference between the count values disappears, the speed can be quickly adjusted to the normal rotation speed, and the control with high responsiveness can be performed.

Further, since the brake control is performed only by comparing the respective count values, the configuration of the rotation control means can be simplified and the cost can be reduced.

In this case, it is preferable that the braking control means has a comparing means for comparing the values of the first counting means and the second counting means.

It is preferable that the first counting means, the second counting means, and the comparing means are constituted by up-down counters. If you use an up-down counter,
Since each count value can be compared at the same time as counting,
The configuration is further simplified, and the difference between the count values can be easily obtained.

It is preferable that the up / down counter is configured to be able to count three or more values.

For example, if a multi-step value can be held by using an up / down counter of 2 bits or more, not only the determination of delay or advance, but also the second count value with respect to the reference first count value , The accumulated amount (a plurality of holdings) of the delay amount and the advance amount can be stored, and as a result, the accumulated error can be corrected.

Further, when the electric energy is first supplied from the generator, the rotation control means detects a predetermined number of rotation detection signals, for example, until the generator is driven by a predetermined number of rotations. The braking control means may be configured to be kept in a non-operating state until the operation is stopped.

When electric energy is first supplied from the generator, that is, when the generator is started, the brake control means is deactivated and the brake is applied until the generator is driven by a predetermined number of revolutions. The absence of this can prioritize power generation. As a result, a voltage that can drive the rotation control means driven by the generated power can be obtained quickly, and control stability can be improved.

Further, the up / down counter may be provided with a specific counter value, and the generator may be braked or not applied with this value as a boundary.

In this way, since the brake control is performed only by comparing the respective count values, the configuration of the rotation control means can be simplified and the cost can be reduced.

It is preferable that the up / down counter is configured to set the up / down counter within ± 1 of the specific counter value when electric energy is first supplied from the generator. .

With this arrangement, since the difference between the preset value of the up / down counter and the specific counter value is small, the brake is applied immediately after the start of the rotation control, and the speed is quickly adjusted to the normal rotation speed. It is possible,
Control with quick response can be performed.

Further, the up / down counter has a value of 3
One or more values can be counted and held, and the range of the counter value in which the control to apply the brake is performed among the plurality of counter values is larger than the range of the counter value in which the brake is not applied. Preferably, it is narrowed.

In this way, the cumulative compensation range in which the rotation cycle of the rotor is delayed from the reference cycle (in a state where the brake is not applied) can be widened, and the accumulated error can be effectively compensated. it can. In other words, when the brake is applied, it is easy to make the rotation cycle of the rotor close to the reference cycle, and the accumulated error is small, so that the compensation range may be small. The accumulated error may increase due to mechanical fluctuations and the like. For this reason, if the cumulative compensation range when the brake is not applied is widened, the accumulated amount of those errors can be stored and the accumulated error can be corrected reliably.

According to a method of controlling an electronically controlled mechanical timepiece of the present invention, a mechanical energy source is driven by the mechanical energy source connected through a wheel train to generate induced power and supply electrical energy. An electronically controlled mechanical timepiece, comprising: a generator, a pointer connected to the wheel train, and rotation control means driven by the electric energy to control a rotation cycle of the generator. A first count value is obtained by counting a reference signal generated based on a signal from a source, and a second count value is obtained by counting a rotation detection signal output corresponding to a rotation cycle of the generator. When the first count value is smaller than the second count value, the generator is braked, and when the first count value is equal to or more than the second count value, the generator is not braked. And it is characterized in and.

With such a control method, if the state where the first count value is smaller than the second count value continues,
In other words, when the torque of the mechanical energy source such as the mainspring is large and the rotation of the generator is progressing, the brake will continue to be applied until the difference between the count values disappears,
The speed can be quickly adjusted to a normal rotation speed, and control with high responsiveness can be performed.

Further, according to the method of controlling an electronically controlled mechanical timepiece of the present invention, an electric energy is generated by generating an induced power by being driven by a mechanical energy source and the mechanical energy source connected via a wheel train. A power supply, a pointer coupled to the wheel train, and a control method of an electronically controlled mechanical timepiece including a rotation control unit driven by the electric energy to control a rotation cycle of the generator. One of a reference signal generated based on a signal from a time standard source and a rotation detection signal output in accordance with the rotation cycle of the generator is used as an up-count signal, and the other is input to an up-down counter as a down-count signal. When the counter value of the up / down counter reaches a preset value, the generator is braked, and the counter value becomes a value other than the above set value. It may be one and performing control not braked to et the generator.

With this control method, when the counter value of the up / down counter reaches the set value, that is, when the torque of the mechanical energy source such as the mainspring is large and the rotation of the generator is progressing In this case, since the brake is continuously applied until the difference between the count values disappears, the speed can be quickly adjusted to the normal rotation speed, and the control with high responsiveness can be performed.

Also, if an up-down counter is used,
Since each count value can be compared at the same time as counting,
The configuration is further simplified, and the difference between the count values can be easily obtained.

[0031]

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

FIG. 1 is a plan view showing a main part of an electronically controlled mechanical timepiece according to a first embodiment of the present invention, and FIGS. 2 and 3 are sectional views thereof.

The electronically controlled mechanical timepiece comprises a barrel wheel 1 comprising a mainspring 1a, barrel gear 1b, barrel barrel 1c and barrel lid 1d. The mainspring 1a has a barrel gear 1 at the outer end.
b, the inner end is fixed to barrel barrel 1c. The barrel case 1c is supported by the main plate 2 and the train wheel bridge 3, and is fixed by a square hole screw 5 so as to rotate integrally with the square hole wheel 4.

The square wheel 4 meshes with a hammer 6 so as to rotate clockwise but not counterclockwise. The method of rotating the hour wheel 4 in the clockwise direction and winding the mainspring 1a is the same as the automatic winding or the manual winding mechanism of the mechanical timepiece, and thus the description is omitted. The rotation of the barrel gear 1b is 7
Doubled to 2nd car 7, sequentially 6.4 times increased to 3rd car 8, 9.375 times increased to 4th car 9 3x increased to 5th car 10, 10 times increased Speeded up to sixth wheel 11 1
The speed is increased by a factor of 0 to the rotor 12, and the speed is increased by a total of 126,000 times through the respective wheel counts 7 to 11 forming the speed increasing train.

The second wheel & pinion 7 is fixed with a cannon pinion 7a, the cannon pinion 7a is fixed with a minute hand 13 for displaying time, and the fourth wheel 9 is fixed with a second hand 14 for displaying time. Therefore, in order to rotate the second wheel & pinion 7 at 1 rpm and the fourth wheel & pinion 9 at 1 rpm, the rotor 12 may be controlled to rotate at 5 rpm. At this time, the barrel gear 1b becomes 1/7 rph.

This electronically controlled mechanical timepiece has a rotor 12,
A generator 20 including a stator 15 and a coil block 16 is provided. The rotor 12 has a rotor magnet 12
a, a rotor pinion 12b, and a rotor inertia disk 12c. The rotor inertia disk 12 c is for reducing the fluctuation of the rotation speed of the rotor 12 with respect to the fluctuation of the driving torque from the barrel car 1. The stator 15 includes a stator body 15a.
Is wound with a 40,000 turn stator coil 15b.

The coil block 16 has 11 cores attached to the magnetic core 16a.
The coil 16b of 10,000 turns is wound. Here, the stator body 15a and the magnetic core 16a are made of PC permalloy or the like. Further, the stator coil 15b and the coil 16b are connected in series so that an output voltage is obtained by adding the respective generated voltages.

Next, a control circuit of the electronically controlled mechanical timepiece will be described with reference to FIGS. FIG. 4 is a block diagram showing an electronically controlled mechanical timepiece according to the embodiment.
FIG. 5 shows a circuit diagram thereof.

The AC output from the generator 20 is boosted rectified,
The voltage is boosted and rectified through a rectification circuit 21 composed of full-wave rectification, half-wave rectification, transistor rectification, and the like, and is supplied to a capacitor 22 as a power supply circuit.

A brake circuit 23 composed of a switching element transistor 23B is connected to the generator 20, and the speed of the generator 20 can be adjusted by controlling the brake circuit 23. It is desirable that the circuit configuration be made in consideration of a parasitic diode of the transistor 23B to which a diode is added.

The rotation control means 50 comprises an oscillation circuit 51, a frequency dividing circuit 52, a rotation detection circuit 53 of the rotor 12, a first counting means 54A, a second counting means 54B, a comparing means 54C, and a braking control circuit 55. Have been. In the present embodiment, the first counting unit 54A, the second counting unit 54B, the comparing unit 54C, and the braking control circuit 55 are configured by an up-down counter 54.

The oscillation circuit 51 outputs an oscillation signal (32768 Hz) by using a quartz oscillator 51A as a time standard source, and this oscillation signal is divided into a certain period by a frequency dividing circuit 52 composed of 12 flip-flops. Is done. This frequency-divided signal is output to the first counting means 54A as the 8 Hz reference signal fs. Therefore, the oscillation circuit 51 and the frequency dividing circuit 52 constitute reference signal generating means.

The rotation detecting circuit 53 comprises a waveform shaping circuit 61 connected to the generator 20 and a mono-multi vibrator 62. The waveform shaping circuit 61 includes an amplifier and a comparator, and converts a sine wave into a rectangular wave. The mono-multi vibrator 62 functions as a band-pass filter that passes only pulses of a certain period or less, and outputs a rotation detection signal FG1 from which noise has been removed.

The rotation detection signal FG1 of the rotation detection circuit 53 and the reference signal fs from the frequency dividing circuit 52 are supplied to an up / down counter 54 via a synchronization circuit 70 as shown in FIG.
Are input to the up-count input and the down-count input, respectively.

The synchronizing circuit 70 comprises four flip-flops 71, an AND gate 72 and a NAND gate 73.
The rotation detection signal FG1 is synchronized with the reference signal fs (8 Hz) using the signal of the output (512 Hz) at the stage, and adjustment is made so that these signal pulses are not output overlapping.

The up / down counter 54 is constituted by a 4-bit counter. Up / down counter 54
A signal based on the rotation detection signal FG1 is input from the synchronization circuit 70 to an up-count input, and a signal based on the reference signal fs is input from the synchronization circuit 70 to a down-count input. Thereby, counting of the reference signal fs and the rotation detection signal FG1 (the first counting unit 54A, the second
Counting means 54B) and calculating the difference (comparing means 54C)
And can be done at the same time.

The up / down counter 54 is provided with four data input terminals (preset terminals) A to D. When an H level signal is input to the terminals A to C, the up / down counter 54 The initial value (preset value) of 54 has a counter value set to “7”.

The LOA of the up / down counter 54
A start setting circuit 90 is connected to the D input terminal.
The startup setting circuit 90 is connected to the capacitor 22 and, when power is first supplied to the capacitor 22, outputs an initialization circuit 91 that outputs a system reset signal SR. A frequency dividing circuit 92 for counting that a predetermined number of rotation detection signals FG1 are input, and a flip-flop 93 which receives a signal from the frequency dividing circuit 92 as a clock input and is reset by the system reset signal SR. It is configured.

The frequency dividing circuit 92 is composed of four flip-flops and outputs an H level signal when the rotation detection signal FG1 is inputted for 16 pulses. Therefore, the flip-flop 93 is set so that the H level signal is input to the LOAD input of the up-down counter 54 when the rotation detection signal FG1 is input for 16 pulses after the system reset signal SR is output from the flip-flop 93. I have.

Since the up / down counter 54 does not accept the up / down input until the LOAD input becomes H level, that is, for a certain period after the system reset signal SR is output, the counter value of the up / down counter 54 is "7". Is maintained.

The up / down counter 54 has 4-bit outputs QA to QD. Therefore, the output QD of the fourth bit outputs an L level signal when the counter value is 7 or less, and outputs an H level signal when the counter value is 8 or more. This output QD is connected to the gate of the Nch transistor 23B of the brake circuit 23 connected in parallel with the generator 20. Therefore, from this output QD to H
When the level signal is output, a voltage is applied to the gate of the transistor 23B, the transistor 23B is maintained in the ON state, the generator 20 is short-circuited, and the brake is applied.

On the other hand, when an L level signal is output from the output QD, the gate voltage of the transistor 23B drops, so that the transistor 23B is kept in the OFF state and the brake is not applied to the generator 20. Therefore, since the brake circuit 23 is controlled by the output QD of the up / down counter 54, the up / down counter 54 also serves as the braking control circuit 55.

Next, the operation in this embodiment will be described with reference to FIGS.
This will be described with reference to the timing chart of FIG.

When the generator 20 starts operating, a system reset signal SR is output (step 1, hereinafter, "step" is abbreviated as "S"). After a certain period,
An H level signal is input from the activation setting circuit 90 to the LOAD input of the up / down counter 54 (S2). Then, as shown in FIG. 6, the up-count signal based on the rotation detection signal FG1 and the down-count signal based on the reference signal fs are counted by the up-down counter 54 (S3). These signals are set so that they are not simultaneously input to the counter 54 by the synchronization circuit 70.

For this reason, when the up-count signal is input from the state where the initial count value is set to “7”, the counter value becomes “8”, and the H level signal is output from the output QD to the transistor 23 B of the brake circuit 23. And the brake-on control for applying a brake to the generator 20 is performed (S4, S5).

Next, when a down-count signal is input, the counter value returns to "7" and an L level signal is output from the output QD, so that the brake-off control in which the generator 20 cannot be braked is performed. (S4, S6).

On the other hand, when the torque of the mainspring 1a is large and the rotation speed of the generator 20 is large, the up-count signal may be further input after the counter value becomes "8" by the up-count signal. . In this case, the counter value becomes "9" and the output QD becomes H
The brakes remain on to maintain the level. Then, by keeping the brake applied, the rotation speed of the generator 20 decreases, and the rotation detection signal FG
If the reference signal fs (down count signal) is input twice before 1 is input, the counter values become “8” and “7”.
And the brake is released when it becomes "7".

When such control is performed, the generator 20 approaches the set rotation speed, and as shown in FIG.
An up-count signal and a down-count signal are alternately input, and the state shifts to a locked state in which the counter value repeats “8” and “7”. At this time, the brake is repeatedly turned on and off according to the counter value.

Further, when the torque of the mainspring 1a is released and the torque is reduced, as shown in FIG. 8, the braking time is gradually reduced, and the rotation speed of the generator 20 is close to the reference speed even when the brake is not applied. State.

Then, even if the brake is not applied at all, a large down count value is input. When the count value becomes a small value of "6" or less, it is determined that the torque of the mainspring 1a has decreased, and the hand operation is started. By stopping, making the speed very low, or sounding or lighting a buzzer, a lamp, or the like, the user is urged to wind the mainspring 1a again.

According to the present embodiment, the following effects can be obtained.

(1) An up-count signal based on the rotation detection signal FG1 and a down-count signal based on the reference signal fs are input to the up-down counter 54, and the count of the rotation detection signal FG1 (up-count signal) is used as a reference. In a state where the count value is larger than the count number of the signal fs (down count signal) (when the initial value of the counter 54 is “7”, the counter value is “8” or more), the brake circuit 23
In the state where the count number of the rotation detection signal FG1 is equal to or less than the count number of the reference signal fs (counter value is equal to or less than "7"), the brake of the generator 20 is turned off. Therefore, even when the rotation speed of the generator 20 at the time of start-up or the like is greatly deviated from the reference speed, the speed can be quickly approached to the reference speed, and the responsiveness of the rotation control can be increased.

(2) In the brake control, the counter value is “7”.
Since it is set only by whether it is less than or equal to or more than “8”, it is not necessary to separately set a braking time and the like, so that the rotation control means 50 can have a simple configuration, and component costs and manufacturing costs can be reduced. A mechanical watch can be provided at low cost.

(3) Since the timing at which the up-count signal is input changes according to the rotation speed of the generator 20, the period during which the counter value is "8", that is, the time during which the brake is applied, is also automatically adjusted. can do. Therefore, especially in a locked state where the up-count signal and the down-count signal are alternately input, stable control with quick response can be performed.

(4) Since the up-down counter 54 is used as the counting means, the comparison (difference) between the respective count values can be automatically calculated at the same time as the counting, so that the first and second counting means are used. Compared with the case where the 54A and 54B are separately provided and the comparing means 54C for comparing their count values is provided, the configuration can be simplified and the difference between the count values can be easily obtained.

(5) 4-bit up / down counter 54
Is used, 16 count values can be counted. Therefore, when the up-count signal is continuously input, the input value can be accumulated and counted, and the set value, that is, the up-count signal or the down-count signal is continuously input and the counter value is input. In the range up to "15" or "0", the accumulated error can be corrected. For this reason, even if the rotation speed of the generator 20 greatly deviates from the reference speed, it takes time until the locked state is obtained, but the accumulated error is surely corrected and the rotation speed of the generator 20 is returned to the reference speed. Can maintain accurate hand movements in the long run.

(6) The start setting circuit 90 is provided, and the generator 2
0, the brake control is not performed and the generator 20 is not braked.
2 can be prioritized, the rotation control means 50 driven by the capacitor 22 can be driven quickly and stably, and the stability of subsequent rotation control can be enhanced.

Next, a second embodiment of the present invention will be described with reference to FIG.
0 will be described. In the following embodiments, the same or similar components as those in the above-described embodiments will be denoted by the same reference numerals, and description thereof will be omitted or simplified.

In this embodiment, the up-down counter 5
4, a line decoder 100 is provided, and Y8 to Y15 outputs corresponding to counter values "8" to "15" of the up / down counter 54 are input to the transistor 23B of the brake circuit 23 to perform brake control. .

In this line decoder 100, one of the selected outputs goes to L level and the other 15 outputs go to H level.
01, when one of these outputs is selected, that is, when the counter value of the up / down counter 54 is “8” to “15”, the transistor 2
An H level signal is output to the gate of 3B, and an L level signal is output when the counter value is “7” or less.

The outputs of Y0 and Y15 of the line decoder 100 are input to the NAND gate 102 to which the output from the synchronization circuit 70 is input. Therefore, for example, when a plurality of input of the up-count signal continues and the counter value becomes “15” and the L-level signal is output from Y15, the up-count signal further becomes N
Even if the signal is input to the AND gate 102, the input is canceled so that the up-count signal is not input to the up-down counter 54 any more. Thus, the counter value is set so as not to exceed “15” and become “0” or to exceed “0” and become “15”. In the present embodiment, the initial value of the up / down counter 54 is set to the counter value “8”.

In this embodiment, the same effects as (1) to (6) of the first embodiment can be obtained, and the following effects can be obtained.

(7) The line decoder 100 is provided to provide each output Y0 to Y15 corresponding to each counter value “0” to “15”.
And outputs Y0 and Y15 to NAND
Since the signal is returned to the gate 102, the counter value is "15" even if the up-count signal or the down-count signal continues.
Can be prevented from becoming “0” beyond “0” or “15” beyond “0”. When the accumulated error becomes very large, whether the error is in the leading direction or in the lagging direction Can be accurately grasped, and erroneous control can be surely eliminated.

Next, a third embodiment of the present invention will be described with reference to FIG.
This will be described with reference to 1 to 15. In the present embodiment, FIG.
As shown in FIG.
20 is provided in the generator 20. Specifically, the generator 2
A brake circuit 120 is constituted by switches 121 and 122 that short-circuit MG1 and MG2, which are output terminals of 0, and apply a short brake. In the present embodiment, the switches 121 and 122 are configured by Pch transistors.

The voltage doubler rectifier circuit 1 is constituted by a capacitor 123 connected to the generator 20, diodes 124 and 125, and transistors 126 and 127 as switching elements.
05 is constituted.

The brake circuit 120 is controlled by the rotation control means 50 driven by the electric power supplied from the power supply circuit (capacitor) 22, as in the above embodiments.

The braking control circuit 55 includes a chopper signal generator 8 in addition to the up / down counter 54 and the synchronization circuit 70.
0.

The up-count input and the down-count input of the up-down counter 54 include a rotation detection circuit 5.
The rotation detection signal FG1 of No. 3 and the reference signal fs from the frequency dividing circuit 52 are input via the synchronization circuit 70, respectively.

The up / down counter 54 is composed of a 4-bit counter as in the above embodiment. Note that, of the four data input terminals (preset terminals) A to D of the up / down counter 54, the terminals A, B, D
, The initial value (preset value) of the up / down counter 54 is set to the counter value “11”.

Since the up / down counter 54 does not accept the up / down input until the LOAD input, that is, the system reset signal SR goes low, the up / down counter 54 shown in FIG.
As shown in (5), the counter value of the up / down counter 54 is maintained at "11".

The up-down counter 54 has 4-bit outputs QA to QD. Therefore, if the counter value is “12” or more, the outputs QC and Q of the third and fourth bits are output.
D outputs an H level signal, and the counter value is "11".
If it is below, at least one of the third and fourth bit outputs QC and QD always outputs an L level signal.

Therefore, AN to which outputs QC and QD are inputted
The output LBS of the D gate 110 becomes an H level signal when the counter value of the up / down counter 54 is "12" or more, and becomes an L level signal when the counter value is "11" or less. This output LBS is supplied to the chopper signal generator 80.
It is connected to the.

It should be noted that the NAN to which the outputs QA to QD are input
Each output of the D gate 111 and the OR gate 112 is the NAND gate 10 to which the output from the synchronization circuit 70 is input.
2, respectively. Therefore, for example, when a plurality of input of the up-count signal continues and the counter value becomes “15”
, The L level signal is output from the NAND gate 111, and even if the up-count signal is input to the NAND gate 102, the input is canceled so that the up-count counter 54 does not receive the up-count signal any more. Is set. Similarly, when the counter value becomes “0”, an L level signal is output from the OR gate 112, so that the input of the down count signal is canceled. Thus, similarly to the second embodiment, the counter value is set so as not to exceed “15” and become “0” or to exceed “0” and become “15”.

The chopper signal generator 80 has three ANDs.
The output Q5 of the frequency dividing circuit 52 is constituted by gates 82 to 84.
To a first chopper signal generating means 81 for outputting a first chopper signal CH1 using
6 and 87, a second chopper signal generating means 85 for outputting a second chopper signal CH2 using outputs Q5 to Q8 of the frequency dividing circuit 52, and the up / down counter 5
4 and the second chopper signal generating means 85
And an NOR gate 89 to which the output of the AND gate 88 and the output CH1 of the first chopper signal generating means 81 are input.

The output CH3 from the NOR gate 89 of the chopper signal generator 80 is input to the gates of switches 121 and 122 formed of Pch transistors.
Therefore, when an L level signal is output from the output CH3,
The switches 121 and 122 are kept on, and the generator 20 is short-circuited and the brake is applied.

On the other hand, when the H level signal is output from the output CH3, the switches 121 and 122 are kept in the off state, and the brake is not applied to the generator 20. Therefore, the generator 20 can be chopper-ring-controlled by the chopper signal from the output CH3.

Next, the operation in this embodiment will be described with reference to FIGS.
14 and the output waveform diagram, and FIG.
This will be described with reference to the flowchart of FIG.

When the generator 20 starts to operate, the initialization circuit 9
When a system reset signal SR of 1 to L level is input to the LOAD input of the up / down counter 54 (S1
1) As shown in FIG. 12, the up-count signal based on the rotation detection signal FG1 and the down-count signal based on the reference signal fs are counted by the up-down counter 54 (S12). These signals are set so that they are not simultaneously input to the counter 54 by the synchronization circuit 70.

For this reason, when the up-count signal is input from the state where the initial count value is set to “11”, the counter value becomes “12”, the output LBS becomes an H level signal, and the chopper signal generator 80 Is output to an AND gate 88.

On the other hand, when the down-count signal is input and the counter value returns to "11", the output LBS becomes an L level signal.

In the chopper signal generator 80, as shown in FIG. 13, the output CH1 is output from the first chopper signal generator 81 using the outputs Q5 to Q8 of the frequency dividing circuit 52.
The output CH2 is output from the second chopper signal generating means 85.

When an L level signal is output from the output LBS of the up / down counter 54 (count value “11” or less), the output from the AND gate 88 is also an L level signal. The output CH3 is a chopper signal obtained by inverting the output CH1, that is, the duty ratio (the ratio at which the switches 121 and 122 are turned on) in which the H level signal (brake off time) is long and the L level signal (brake on time) is short. It becomes a small chopper signal. Therefore, the brake-on time in the reference cycle is shortened, and the brake is hardly applied to the generator 20, that is, the brake-off control giving priority to the generated power is performed (S13, S15).

On the other hand, the output L of the up / down counter 54
When the H level signal is output from the BS (count value “12” or more), the output from the AND gate 88 is also an H level signal, so the output CH3 from the NOR gate 89 is a chopper in which the output CH2 is inverted. Signal, ie L
The level signal (brake-on time) is long, and the H-level signal (brake-off time) is short. Therefore, the brake-on time in the reference cycle becomes longer, and the brake-on control is performed on the generator 20. However, since the brake is turned off at a constant cycle, the choppering control is performed, and the decrease in the generated power is suppressed. (S13, 1)
4).

When the torque of the mainspring 1a is large and the rotation speed of the generator 20 is large, the counter value becomes "12" by the up-count signal.
Further, an up-count signal may be input. In this case, the counter value becomes "13" and the output L
In order to maintain the BS at the H level, the brake-on control is performed in which the brake is applied while the brake is turned off at a constant cycle by the chopper signal CH3. When the brake is applied, the rotation speed of the generator 20 decreases, and the reference signal f is output before the rotation detection signal FG1 is input.
When s (down count signal) is input twice, the counter value decreases to “12” and “11”, and the control is switched to the brake-off control in which the brake is released when the counter value reaches “11”.

By performing such control, the generator 20 approaches the set rotation speed, and as shown in FIG. 12, an up-count signal and a down-count signal are alternately input, and the counter value is reduced. The state shifts to a locked state in which “12” and “11” are repeated. At this time, the brake is repeatedly turned on and off according to the counter value. That is, a chopper signal having a large duty ratio and a chopper signal having a small duty ratio are applied to the switches 121 and 122 during one cycle of the reference cycle in which the rotor makes one rotation, and chopper ring control is performed.

Further, when the torque of the mainspring 1a is released and the torque is reduced, the braking time is gradually shortened, and the rotation speed of the generator 20 is close to the reference speed even when the brake is not applied.

Then, even if the brake is not applied at all, a large down-count value is input, and when the count value becomes a small value of "10" or less, the mainspring 1a
It is determined that the torque of the mainspring has decreased, the hand movement is stopped, the speed is extremely reduced, and a buzzer, a lamp or the like is sounded or turned on, thereby urging the user to rewind the mainspring 1a.

Therefore, while the H level signal is being output from the output LBS of the up / down counter 54, the brake-on control is performed by the chopper signal having a large duty ratio, and while the L level signal is being output from the output LBS, Brake-off control is performed by a chopper signal having a small duty ratio. That is, the brake-on control and the brake-off control are switched by the up / down counter 54 as the braking control means.

In this embodiment, when the output LBS is an L level signal, the chopper signal CH3 is in the H level period:
The L level period is 15: 1, that is, the duty ratio is 1/16
= 0.0625, and when the output LBS is an H level signal, the chopper signal CH3 has an H level period: L level period of 1:15, that is, a duty ratio of 15/16 =
It becomes a chopper signal of 0.9375.

Then, from MG1 and MG2 of generator 20, alternating current waveforms corresponding to changes in magnetic flux are output as shown in FIG. At this time, the chopper signal CH having a constant frequency and a different duty ratio according to the signal of the output LBS.
3 is appropriately applied to the switches 121 and 122, and the output LB
When S outputs the H level signal, that is, at the time of the brake-on control, the short braking time in each chopper cycle becomes longer, the braking amount increases, and the generator 20 is decelerated. Then, the amount of power generation also decreases as much as the brake is applied. However, the energy stored during the short brake can be output when the switches 121 and 122 are turned off by the chopper signal and the chopper can be boosted. Can be compensated for, and the braking torque can be increased while suppressing a decrease in the generated power.

Conversely, when the output LBS outputs an L level signal, that is, during the brake-off control, the short brake time in each chopper cycle is shortened, the brake amount is reduced, and the speed of the generator 20 is increased. Also in this case, since the chopper can be boosted when the switches 121 and 122 are turned off from on by the chopper signal, the generated power can be improved as compared with the case where the control is performed without applying the brake at all.

The AC output from the generator 20 is boosted and rectified by the voltage doubler rectifier circuit 105 and charged in the power supply circuit (capacitor) 22, which drives the rotation control means 50.

The output L of the up / down counter 54
Since the BS and the chopper signal CH3 both use the outputs Q5 to Q8 and Q12 of the frequency dividing circuit 52, that is, since the frequency of the chopper signal CH3 is an integer multiple of the frequency of the output LBS, the output LBS The change in the output level, that is, the switching timing of the brake-on control and the brake-off control, and the chopper signal CH3 are generated in synchronization.

In this embodiment as well, the same effects as (1) to (5) and (7) of each of the above embodiments can be obtained.
There are also the following effects:

(8) Further, when the counter value of the up / down counter 54 is equal to or more than "12", that is, in the range of four counts of "12 to 15", the brake is applied and "11"
In the following, in other words, the control is performed so as not to apply the brake when it is within the range of 12 counts of "11 to 0". In other words, in each counter value of the up / down counter 54, the range where the brake is applied is not applied. Since the range is narrower than the range, the cumulative compensation range in the case where the rotor rotation cycle is delayed from the reference cycle can be widened, and the cumulative error which is likely to occur when the brake is not applied is reliably corrected so that the generator 20 Can be returned to the reference speed.

That is, when the counter value is equal to or greater than "12", the torque of the mainspring 1a is large, so that there is little possibility that the up-count signal is input due to temporary factors such as mechanical fluctuations, and the brake is not applied. Is rarely input continuously for three to four or more signals. Therefore, even if the range of the counter value for applying the brake is set to a narrow range of four, the control can be reliably performed. On the other hand, when the brake is not applied, the down-count value is continuously input due to a temporary factor such as a mechanical fluctuation or a shock applied to the timepiece due to a decrease in the torque of the mainspring 1a. Could be done.

At this time, in this embodiment, since the count value for 12 counts is set in the range where the brake is not applied, even if the down count value is continuously inputted, the accumulated amount is stored and accumulated. The error can be reliably corrected.

(9) The brake on / off control is
Since two types of chopper signals CH3 having different duty ratios are used, the brake (braking torque) can be increased without lowering the charging voltage (power generation voltage). In particular, since the control is performed using a chopper signal having a large duty ratio when the brake is on, the braking torque can be increased while suppressing a decrease in the charging voltage,
Efficient brake control can be performed while maintaining the stability of the system. As a result, the duration of the electronically controlled mechanical timepiece can be increased.

(10) Further, also at the time of the brake-off control, the chopper control is performed by the chopper signal having a small duty ratio, so that the charging voltage while the brake is off can be further improved.

(11) Since the output level change of the output QD, that is, the switching timing of the brake ON / OFF control and the change timing of the chopper signal CH3 from ON to OFF are synchronized, the chopper signal CH3 of the generator 20 is synchronized. Can be output at regular intervals, and the output can be used as a rate measurement pulse of a timepiece.

That is, the output LBS and the chopper signal CH
When the output LBS 3 is not synchronized, a portion where the electromotive voltage is high is generated from the generator 20 also when the output LBS changes apart from the chopper signal CH3 having a constant period. Therefore, the generator 2
The "whisker portion" in the output waveform of 0 cannot be used as a rate measurement pulse because it is not always output at a constant interval, but if synchronized as in the present embodiment, it can be used as a rate measurement pulse. .

The present invention is not limited to each embodiment, but may be modified or modified within a range that can achieve the object of the present invention.
Improvements and the like are included in the present invention.

For example, in the above embodiment, the 4-bit up / down counter 54 is used as the counting means. However, an up / down counter of 3 bits or less may be used, or an up / down counter of 5 bits or more may be used. Is also good. If an up / down counter having a large number of bits is used, the countable value is increased, so that the range in which the accumulated error can be stored can be increased. In particular, control in an unlocked state such as immediately after starting the generator 20 is advantageous. On the other hand, if a counter with a small number of bits is used, the range in which the accumulated error can be stored becomes small. However, in the locked state, up and down are repeated. There is an advantage that can be reduced.

The specific counter value is "8" or "12".
But is not limited to these,
The brake may be applied at "11" to "15". Preferably, the range of the counter value for applying the brake is narrower than the range of the counter value for not applying the brake. However, depending on the setting of the watch, the range of the counter value for applying the brake may be equal to the range of the counter value for not applying the brake, or the range of the counter value for not applying the brake (brake-off) may be wider. .

Further, the range of the counter value for applying the brake is the maximum or minimum counter value (for example, "15").
Or "0"). If such a value is included, the outputs QA to QA
A brake control signal can be easily formed using QD, and the configuration of the brake control means can be simplified.

The counting means is not limited to the up / down counter, but may be used for the reference signal fs and the rotation detection signal Fs.
The first and second counting means may be separately provided for G1. However, in this case, a comparing means (comparing circuit) for comparing the count values of the respective counting means must be separately provided, and using the up-down counter 54 has the advantage that the circuit configuration is simplified.

Furthermore, the start setting circuit 90 is not necessarily provided, but it is preferable that the start setting circuit 90 be provided since the power generation can be prioritized when the generator 20 is started and the rotation control means 50 can be driven quickly. The specific configuration of the activation setting circuit 90 is not limited to the above embodiment.

In the first and second embodiments,
As in the third embodiment, a chopper pulse is added to the brake signal to be applied to the transistor 23B so that the transistor 2B
Choppering control for repeating ON / OFF of 3B may be performed. By performing such choppering control, there is an advantage that the brake torque can be increased while maintaining the generated power at or above a certain level.

[0119]

As described above, according to the electronically controlled mechanical timepiece and the method for controlling the same according to the present invention, the response of the speed control can be made faster and the cost can be reduced.

[Brief description of the drawings]

FIG. 1 is a plan view showing a main part of an electronically controlled mechanical timepiece according to a first embodiment of the invention.

FIG. 2 is a sectional view showing a main part of FIG.

FIG. 3 is a sectional view showing a main part of FIG. 1;

FIG. 4 is a block diagram showing a configuration of the first embodiment.

FIG. 5 is a circuit diagram showing a configuration of the first embodiment.

FIG. 6 is a timing chart in the circuit of the first embodiment.

FIG. 7 is a timing chart in the circuit of the first embodiment.

FIG. 8 is a timing chart in the circuit of the first embodiment.

FIG. 9 is a flowchart illustrating a control method according to the first embodiment.

FIG. 10 is a circuit diagram showing a configuration of a second embodiment of the present invention.

FIG. 11 is a circuit diagram showing a configuration of a third embodiment of the present invention.

FIG. 12 is a timing chart in the circuit of the third embodiment.

FIG. 13 is a timing chart in the circuit of the third embodiment.

FIG. 14 is a timing chart in the circuit of the third embodiment.

FIG. 15 is a flowchart illustrating a control method according to the third embodiment.

[Explanation of symbols]

 Reference Signs List 1 barrel car 1a mainspring 7 second wheel 8 third wheel 9 fourth wheel 10 fifth wheel 11 sixth wheel 12 rotor 13 minute hand 14 second hand 20 generator 21 rectifier circuit 22 capacitor 23 brake circuit 23B transistor 50 rotation control means 51 oscillation Circuit 51A Quartz crystal unit 52 Frequency divider 53 Rotation detection circuit 54 Up / down counter 54A First counting means 54B Second counting means 54C Comparison means 55 Braking control circuit 61 Waveform shaping circuit 62 Monomultivibrator 70 Synchronization circuit 71 Flip-flop 80 Chopper Signal generator 81 First chopper signal generator 85 Second chopper signal generator 90 Start setting circuit 91 Initialization circuit 92 Divider circuit 93 Flip-flop 100 Line decoder 105 Double voltage rectifier circuit 120 Brake circuits 121, 122 Switch H 123 Capacitor 124 Diode 126, 127 Transistor fs Reference signal FG1 Rotation detection signal SR System reset signal

Claims (10)

[Claims] 1. A mechanical energy source, a generator driven by the mechanical energy source coupled through a wheel train to generate induced power and provide electrical energy, and coupled to the wheel train. And an electronically controlled mechanical timepiece having a rotation control means driven by the electric energy to control a rotation cycle of the generator, wherein the rotation control means detects a rotation cycle of the generator. Rotation detection means for outputting a rotation detection signal corresponding to the rotation cycle, reference signal generation means for generating a reference signal based on a signal from a time standard source, and a second signal for counting the reference signal from the reference signal generation means. 1 counting means, second counting means for counting a rotation detection signal from the rotation detecting means, and a first count value counted by the first counting means is counted by the second counting means. A braking control means for applying a brake to the generator in a state smaller than the second count value, and not applying a brake to the generator in a state where the first count value is equal to or larger than the second count value. An electronically controlled mechanical clock. 2. The electronically controlled mechanical timepiece according to claim 1, wherein said braking control means includes a first counting means and a second counting means.
An electronically controlled mechanical timepiece having comparison means for comparing a value with a counting means. 3. The electronically controlled mechanical timepiece according to claim 2, wherein the first counting means, the second counting means, and the comparing means are constituted by up-down counters. clock. 4. The electronically controlled mechanical timepiece according to claim 3, wherein the up / down counter is configured to count and hold three or more values. clock. 5. The electronically controlled mechanical timepiece according to claim 1, wherein the rotation control means is configured such that when the electric energy is first supplied from the generator, the generator is turned on. An electronically controlled mechanical timepiece configured to maintain the brake control means in an inoperative state until driven by a predetermined number of revolutions. 6. The electronically controlled mechanical timepiece according to claim 3, wherein the up / down counter is provided with a specific counter value, and the generator is braked or the power generation is performed at the specified value. An electronically controlled mechanical timepiece, wherein the timepiece is not braked. 7. The electronically controlled mechanical timepiece according to claim 6, wherein the up / down counter is within ± 1 of the specific counter value when the electric energy is first supplied from the generator. An electronically controlled mechanical timepiece configured to set an up / down counter. 8. The electronically controlled mechanical timepiece according to claim 4, wherein the up / down counter has a counter value in which a brake value is controlled out of the plurality of counter values in a range in which the brake is not applied. An electronically controlled mechanical timepiece characterized by being narrower than the value range. 9. A mechanical energy source, a generator driven by the mechanical energy source coupled through the wheel train to generate induced power and provide electrical energy, and coupled to the wheel train. And a rotation control means for controlling a rotation cycle of the generator driven by the electric energy, wherein a reference signal generated based on a signal from a time standard source is provided. To obtain a first count value, and count a rotation detection signal output corresponding to the rotation cycle of the generator to obtain a second count value, wherein the first count value is calculated from the second count value. A brake is applied to the generator when the first count value is smaller than the second count value, and a control is performed such that the brake is not applied to the generator when the first count value is equal to or greater than the second count value. Method. 10. A mechanical energy source, a generator driven by the mechanical energy source coupled through the wheel train to generate induced power and provide electrical energy, and coupled to the wheel train. And a rotation control means for controlling a rotation cycle of the generator driven by the electric energy, wherein a reference signal generated based on a signal from a time standard source is provided. And one of the rotation detection signals output corresponding to the rotation cycle of the generator as an up-count signal, and the other as a down-count signal, which is input to an up-down counter, and the counter value of the up-down counter is a preset value. When the brake is applied to the generator, and when the counter value becomes a value other than the above set value, the brake is not applied to the generator. Electronically controlled mechanical control method of the watch, characterized in that.