JP4747484B2 - Electronically controlled mechanical timepiece, control program for electronically controlled mechanical timepiece, recording medium, method for controlling electronically controlled mechanical timepiece, and method for designing electronically controlled mechanical timepiece - Google Patents

Description

The present invention is electronic-controlled mechanical timepiece, an electronically controlled mechanical timepiece of the control program, the control method of the recording medium and an electronic-controlled mechanical timepiece records the program relates design method and, more particularly, a mainspring, this mainspring a generator for outputting electrical energy by generating induced power with driven, that having a rotation control unit electronic controlled mechanical for controlling the rotation cycle of the generator is driven by the electrical energy The present invention relates to a timepiece, a control program for an electronically controlled mechanical timepiece , a recording medium, and a control method and design method for an electronically controlled mechanical timepiece .

  The mechanical energy generated when the mainspring opens is converted into electrical energy by a generator, and the rotation control device is operated by the electrical energy to control the value of the current flowing through the coil of the generator. As an electronically controlled mechanical timepiece that accurately drives a pointer to be displayed and accurately displays the time, one described in Patent Document 1 is known.

  In such an electronically controlled mechanical timepiece, a reference signal generated based on a signal from a time standard source such as a crystal oscillator is compared with a rotation detection signal corresponding to the rotation period of the generator to compare the generator brake. The generator was controlled by setting an amount (for example, the time to apply the brake).

  In other words, when the generator rotation cycle is faster than the reference signal, the brake time is lengthened according to the phase difference, thereby slowing the generator rotation cycle and returning it to the reference cycle. Was.

Japanese Patent Publication No.7-119812

  However, if the generator rotation cycle is rapidly accelerated due to disturbances, etc., the braking time will be longer to eliminate the indication error by the brake control means, and the generator rotation cycle will be significantly delayed to stop the generator. Had controlled in the direction.

For this reason, even though the rotational period temporarily increased due to disturbances, etc., the generator could stop because a large amount of braking (long braking time) was applied according to the speed. .
Since the cogging torque is affected once the generator is stopped, it is necessary to apply a very large torque to rotate the generator again. Therefore, if the mainspring is not in a full winding state or a state close to full winding, there is a problem that the generator is stopped as it is and the duration is shortened.
In addition, since the mainspring is almost full, even if the generator can be rotated again, it takes some time for the generator to start rotating, so it is operated in conjunction with the rotation of the generator. There is a problem that an indication error occurs in the pointer.

An object of the present invention, a recording medium and an electronic-controlled mechanical recorded generator Ru electronic-controlled mechanical timepiece can be prevented from being stopped by the brake control, an electronically controlled mechanical timepiece of the control program, the program The object is to provide a clock control method and a design method.

An electronically controlled mechanical timepiece according to the present invention includes a mainspring, a speed increasing wheel train as an energy transmission device that transmits the torque of the main spring, a pointer connected to the speed increasing wheel train for displaying a time, and the spring An electronically controlled mechanical timepiece comprising: a generator that is driven to generate an induced power to supply electric energy; and a rotation control device that is driven by the electric energy to control a rotation period of the generator. The rotation control device compares a reference signal generated based on a signal from a time standard source and a rotation detection signal corresponding to a rotation period of the generator to perform brake control of the generator, When the rotation cycle of the generator is measured and the rotation cycle is equal to or longer than a first set cycle longer than a reference cycle, the brake amount of the generator is set to the first brake set value. Comprising a generator halting preventing means for preventing the stopping of the constant to the generator, wherein the first setting period, said generator stops have to switch the brake of the power generator to a first brake setting value The upper limit of the cycle and the brake amount of the generator is switched to the first brake set value, the fluctuation range of the rotation cycle of the generator becomes large, and the brake is applied for one cycle or more. the cycle of lost or the lower limit, Ru der those characterized by what is set in the period between these upper and lower limits.

According to such an electronically controlled mechanical timepiece of the present invention, since it is possible to prevent the generator from being stopped, it is possible to provide a timepiece having a long duration and to prevent the generator from restarting after being temporarily stopped. The indication error of the indication device (pointer) can be eliminated.
Furthermore, the first setting cycle for setting the first brake set value with a small braking force is set to the upper limit of the cycle in which the generator stops unless the brake amount of the generator is switched to the first brake set value, And if the brake amount of the generator is switched to the first brake set value, the fluctuation range of the rotation cycle of the generator becomes large, and the cycle in which the brake is applied for one cycle or more and is not applied is set to the lower limit. Since the cycle between these upper and lower limits is set, the fluctuation range of the rotation cycle of the generator becomes large, the pointer does not move at a constant speed, and the user will notice the fluctuation. It can prevent movement and stop the generator.

  In such an electronically controlled mechanical timepiece, the first brake set value is set to a value that makes the brake amount zero, or a value that is less than or equal to the minimum brake amount that can be set by the brake control means. It is preferable.

  In such this invention, when the rotation period of a generator becomes late | slow and becomes more than a 1st setting period, a brake amount is set to a 1st brake setting value and a generator is controlled. Here, since the first brake set value is, for example, a small brake amount that is zero or less than the minimum brake amount, the energy of the mechanical energy source such as the mainspring is not lost if the first brake set value is controlled. As long as the generator can be prevented from stopping.

In the electronically controlled mechanical timepiece of the invention, it is preferable that the generator stop prevention means sets the generator brake amount to the first brake set value in synchronization with the generator rotation cycle.
With such a configuration, the brake amount can be set to the first brake set value immediately after detecting a rotation period that is equal to or greater than the first set period, so that quick control can be performed.

A control program for an electronically controlled mechanical timepiece according to the present invention includes a mainspring, a speed increasing wheel train as an energy transmission device that transmits the torque of the power spring, a pointer that is connected to the speed increasing wheel train and displays time. An electronically controlled mechanical timepiece comprising: a generator that is driven by the mainspring to generate an induced electric power to supply electric energy; and a rotation control device that is driven by the electric energy to control a rotation cycle of the generator. The rotation control device compares the reference signal generated based on the signal from the time standard source and the rotation detection signal corresponding to the rotation cycle of the generator to perform brake control of the generator. and brake control means for the rotation cycle of the generator is measured, its rotation cycle is rather long than the reference period, and the generator of the braking amount of the first brake If the switching is not switched to a constant value, the upper limit is the period at which the generator stops, and if the brake amount of the generator is switched to the first brake setting value, the fluctuation range of the rotation period of the generator increases. When the brake is applied for a period of more than one period or the period when the brake is not applied is a lower limit, and the brake amount of the generator is greater than the first set period set by the period between these upper and lower limits , it is characterized in that the function as generator halting preventing means for preventing the stopping of the generator is set to the first brake setting value.

The recording medium of the present invention is also driven by the mainspring , a speed increasing wheel train as an energy transmission device for transmitting the torque of the main spring, a pointer connected to the speed increasing wheel train for displaying time, and the spring . A control program for an electronically controlled mechanical timepiece comprising: a generator that generates induced electric power to supply electric energy; and a rotation control device that is driven by the electric energy and controls a rotation cycle of the generator. A recording medium for recording, wherein the rotation control device compares a reference signal generated based on a signal from a time standard source and a rotation detection signal corresponding to a rotation cycle of the generator to control the brake of the generator and brake control means for the rotation cycle of the generator is measured, its rotation cycle is rather long than the reference period, and the first brake setting the amount of braking the generator If it is not switched to the value, the upper limit is the period at which the generator stops, and if the brake amount of the generator is switched to the first brake setting value, the fluctuation range of the rotation period of the generator increases. When the brake is applied for a period of more than one period or the period when the brake is not applied is a lower limit, and the brake amount of the generator is greater than the first set period set by the period between these upper and lower limits , is characterized in that it has recorded a program for functioning as a generator halting prevention means is set to the first brake setting value to prevent stopping of the generator.

If such a control program of the present invention provided by a communication means such as a recording medium or the Internet is incorporated in an electronically controlled mechanical timepiece, when the rotation period of the generator becomes slower than the first set period, Since the brake control is performed with the brake amount of the first brake set value, it is possible to reliably prevent the generator from being stopped. For this reason, accurate rotation control can always be performed in the operating state.
Further, since this program can be installed and incorporated in an electronically controlled mechanical timepiece via a recording medium such as a CD-ROM or a communication means such as the Internet, the first set period is set for each electronically controlled mechanical timepiece . It can be set optimally and easily according to characteristics and the like, and more accurate rotation control can be performed.

The method for controlling an electronically controlled mechanical timepiece according to the present invention includes a mainspring, a speed-up wheel train as an energy transmission device that transmits the torque of the spring, and a pointer that is connected to the speed-up wheel train and displays time. An electronically controlled mechanical timepiece comprising: a generator that is driven by the mainspring to generate an induced electric power to supply electric energy; and a rotation control device that is driven by the electric energy to control a rotation cycle of the generator. And a reference signal generated based on a signal from a time standard source and a rotation detection signal corresponding to a rotation period of the generator to perform brake control of the generator, and the generator If the rotation period of becomes long first set period or more than the reference period, the amount of braking said generator is set to the first brake setting value to prevent stopping of the generator, The first setting cycle has an upper limit of a cycle in which the generator stops unless the brake amount of the generator is switched to the first brake set value, and the brake amount of the generator is set to the first brake set value. If it is switched to, the fluctuation range of the rotation cycle of the generator will increase, and the cycle in which the brake will be applied or disengaged for more than one cycle is set as the lower limit, and the cycle between these upper and lower limits is set It is characterized by.

  Also in the present invention, when the rotation period of the generator becomes slower than the first set period, the brake control is performed with the brake amount of the first brake set value, so that it is possible to reliably prevent the generator from being stopped. it can.

The electronically controlled mechanical timepiece design method of the present invention includes a spring, a speed increasing wheel train as an energy transmission device for transmitting the torque of the power spring, a pointer connected to the speed increasing wheel train and displaying time. A generator driven by the mainspring to generate an induced electric power to supply electric energy, and a rotation control device driven by the electric energy to control a rotation period of the generator; A reference signal generated based on the signal of the generator and a rotation detection signal corresponding to the rotation cycle of the generator are compared to perform brake control of the generator, and a first rotation cycle of the generator is longer than a reference cycle. when a set period or more, the generator configured set of electronically controlled mechanical timepiece as a braking amount is set to the first brake setting value to prevent stopping of the generator Switching to a method, the upper limit seeking period the generator have to switch the amount of braking power generator to a first brake setting value will stop, and the braking amount of said generator to a first brake setting value If this occurs, the fluctuation range of the rotation cycle of the generator will increase, and the cycle in which the brake will be applied or disengaged over one cycle will be determined as the lower limit, and the first set cycle will be the upper and lower limits. The period is set to a period between.

If the first setting cycle, which is a reference for setting the first brake setting value with a small brake amount, is not set to an appropriate value, the fluctuation range of the rotation cycle of the generator increases or the generator stops.
Although the fluctuation range of the rotation period of such a generator increases or the period in which the generator is stopped varies depending on the type of electronic equipment, the setting of the braking force, etc., it depends on the design method of the present invention. For example, since each period is actually obtained, it is possible to appropriately set the first setting period in which the fluctuation range of the rotation period of the generator is large or the generator is not stopped.

As described above, electronic-controlled mechanical timepiece of the present invention, an electronic-controlled mechanical timepiece of the control program, a recording medium, according to the control method and design method for an electronically controlled mechanical timepiece, the generator by the brake control Stopping can be surely prevented, and the responsiveness of the speed control can be improved and stable control can be performed.

FIG. 1 is a block diagram showing an electronically controlled mechanical timepiece according to an embodiment of the present invention.
The electronically controlled mechanical timepiece is connected to the mainspring 1 as a mechanical energy source, the speed increasing wheel train 3 as an energy transmission device for transmitting the torque of the main spring 1 to the generator 2, and the speed increasing wheel train 3 to be connected to the time. And a pointer 4 for displaying.

  The generator 2 is driven by the mainspring 1 via the speed increasing gear train 3, and generates an induced power to supply electric energy. The AC output from the generator 2 is stepped up and rectified through a rectifier circuit 5 including step-up rectification, full-wave rectification, half-wave rectification, transistor rectification, and the like, and is charged and supplied to a power supply circuit 6 composed of a capacitor and the like.

  In the present embodiment, as shown in FIG. 2, a brake circuit 20 including a rectifier circuit 5 is provided in the generator 2. The brake circuit 20 includes a first switch 21 connected to a first AC input terminal MG1 to which an AC signal (AC current) generated by the generator 2 is input, and a second switch to which the AC signal is input. And the second switch 22 connected to the AC input terminal MG2, and by simultaneously turning on these switches 21, 22, the first and second AC input terminals MG1, MG2 are short-circuited to form a closed loop state. And a short brake is applied.

  The first switch 21 includes a Pch first field effect transistor (FET) 26 whose gate is connected to the second AC input terminal MG2, and a chopper signal (chopper pulse) from a chopper signal generator 80 described later. A second field effect transistor 27 in which CH5 is input to the gate is connected in parallel.

  The second switch 22 includes a Pch third field effect transistor (FET) 28 whose gate is connected to the first AC input terminal MG1, and a chopper signal CH5 from the chopper signal generator 80 as a gate. An input fourth field effect transistor 29 is connected in parallel.

  The voltage doubler rectifier circuit 5 includes a boosting capacitor 23, diodes 24 and 25, and switches 21 and 22 connected to the generator 2. The diodes 24 and 25 may be any unidirectional element that allows a current to flow in one direction, and the type thereof is not limited. In particular, in the electronically controlled mechanical timepiece, since the electromotive voltage of the generator 2 is small, it is preferable to use a Schottky barrier diode or a silicon diode having a small drop voltage Vf and a low reverse leakage current as the diodes 24 and 25. The DC signal rectified by the rectifier circuit 5 is charged in the power supply circuit (capacitor) 6.

  The brake circuit 20 is controlled by a rotation control device 50 driven by electric power supplied from the power supply circuit 6. As shown in FIG. 1, the rotation control device 50 includes an oscillation circuit 51, a detection circuit 52, and a control circuit 53.

  The oscillation circuit 51 outputs an oscillation signal (32768 Hz) using a crystal resonator 51A which is a time standard source, and this oscillation signal is frequency-divided to a certain period by a frequency divider circuit 54 consisting of 12 stages of flip-flops. The twelfth stage output Q12 of the frequency divider 54 is output as an 8 Hz reference signal fs.

  The detection circuit 52 includes a waveform shaping circuit 61 and a mono multivibrator 62 connected to the generator 2. The waveform shaping circuit 61 is composed of an amplifier and a comparator, and converts a sine wave into a rectangular wave. The mono multivibrator 62 functions as a bandpass filter that passes only pulses having a certain period or less, and outputs a rotation detection signal FG1 from which noise has been removed.

  As shown in FIG. 1, the control circuit 53 includes a brake control device 55 that is a brake control unit and a generator stop prevention device 56 that is a generator stop prevention unit. The brake control device 55 includes an up / down counter 60, a synchronization circuit 70, and a chopper signal generator 80 as shown in FIG.

  The up count input and down count input of the up / down counter 60 are inputted with the rotation detection signal FG1 of the detection circuit 52 and the reference signal fs from the frequency divider circuit 54 via the synchronization circuit 70, respectively.

  The synchronization circuit 70 includes four flip-flops 71, an AND gate 72, and a NAND gate 73, and uses the signal of the fifth-stage output Q5 (1024 Hz) and the sixth-stage output Q6 (512 Hz) of the frequency divider 54. Thus, the rotation detection signal FG1 is synchronized with the reference signal fs (8 Hz) and adjusted so that these signal pulses are not overlapped and outputted.

  The up / down counter 60 is a 4-bit counter. A signal based on the rotation detection signal FG1 is input from the synchronization circuit 70 to the upcount input of the up / down counter 60, and a signal based on the reference signal fs is input from the synchronization circuit 70 to the downcount input. Thereby, the counting of the reference signal fs and the rotation detection signal FG1 and the calculation of the difference can be performed simultaneously.

  The up / down counter 60 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 60 is initialized. The value (preset value) is set to the counter value 7.

  An LOAD input terminal of the up / down counter 60 is connected to an initialization circuit 90 that is connected to the power supply circuit 6 and outputs a system reset signal SR according to the voltage of the power supply circuit 6. In the present embodiment, the initialization circuit 90 is configured to output an H level signal until the charging voltage of the power supply circuit 6 reaches a predetermined voltage, and to output an L level signal when the voltage exceeds the predetermined voltage. Has been.

  Since the up / down counter 60 does not accept the up / down input until the LOAD input becomes L level, that is, until the system reset signal SR is output, the count value of the up / down counter 60 is maintained at “7”. .

  The up / down counter 60 has 4-bit outputs QA to QD. Accordingly, the output QD of the fourth bit outputs an L level signal if the counter value is 7 or less, and outputs an H level signal if the counter value is 8 or more. This output QD is connected to the chopper signal generator 80.

  The outputs of the NAND gate 74 and the OR gate 75 to which the outputs QA to QD are input are respectively input to the NAND gate 73 to which the output from the synchronization circuit 70 is input. Therefore, for example, when a plurality of up-count signals are input and the counter value reaches “15”, an L level signal is output from the NAND gate 74, and even if an up-count signal is input to the NAND gate 73, the input Is set so that no more up count signals are input to the up / down counter 60. Similarly, when the counter value becomes “0”, an L level signal is output from the OR gate 75, and therefore the input of the down count signal is cancelled. Thus, the counter value is set so as not to exceed “15” and become “0”, or exceed “0” and become “15”.

  The chopper signal generator 80 uses an output Q5 to Q8 of the frequency divider 54 to output an AND gate 82 that outputs a first chopper signal CH1, an OR gate 83 that outputs a second chopper signal CH2, and an up-down A brake control signal generation circuit 81 that outputs a chopper signal CH3 serving as a brake control signal using the output QD of the counter 60, the AND gates 84 to which the chopper signals CH2 and CH3 are input, and the outputs of the AND gates 84 And a NOR gate 85 to which CH4 and the output CH1 are input.

  The output CH5 from the NOR gate 85 of the chopper signal generator 80 is input to the gates of the Pch transistors 27 and 29. Therefore, while the chopper output CH5 is at the L level, the transistors 27 and 29 are maintained in the ON state, the generator 2 is short-circuited, and the brake is applied.

  On the other hand, while the output CH5 is at the H level, the transistors 27 and 29 are maintained in the off state, and the generator 2 is not braked. Therefore, the generator 2 can be chopper-controlled by the chopper signal from the output CH5.

  Here, the duty ratio of each of the chopper signals CH1 and CH2 is a ratio of the time during which the generator 2 is braked during one cycle of the chopper signal. In this embodiment, the duty ratio of each chopper signal CH1 and CH2 is This is the ratio of the time that is at the H level during one cycle.

  As shown in FIG. 3, the brake control signal generation circuit 81 includes a rotation period detection circuit 200, a brake amount correction circuit 300, and a signal selection circuit 400.

  The rotation cycle detection circuit 200 includes an AND gate 209 to which an output Q7 (256 Hz) of the frequency dividing circuit 54 and an inverted output XQ (represented by a bar above Q in the figure) of a flip-flop 210 described later are input, A six-stage frequency dividing circuit 201 in which the output of the AND gate 209 is a clock input and the output FG2 of the AND gate 72 is a clear input, AND gates 202 to 206, a NOR gate 207, and an OR gate 208 are provided. ing.

Each of the outputs F2 to F5 of the frequency dividing circuit 201 and the inverted signal of the output F6 are input to the AND gate 202 and the NOR gate 207, respectively.
To the AND gate 203, an inverted signal of the output of the AND gate 202 and an inverted signal of the output F6 are input. Outputs F3 and F6 are input to the AND gate 204. The inverted signal of the output F2 and the output of the NOR gate 207 are input to the AND gate 205, and the output F2 and the output of the NOR gate 207 are input to the AND gate 206.
The signals of the AND gates 202 and 205 are input to the OR gate 208.

  The output FG2 is a pulse signal that is output almost once in synchronization with the rise of the rotation detection signal FG1, that is, once in one cycle of the rotation detection signal FG1.

  Further, the rotation period detection circuit 200 includes a flip-flop 210 in which an output of the AND gate 204 is a clock input, an inverted signal of the output FG2 is a clear input, and an H level signal is always applied to a data input, and an AND gate 203. , And the flip-flops 211 to 213 having the outputs of the OR gate 208 and the AND gate 206 as data inputs and the rotation detection signal FG1 as a clock input.

The rotation period detection circuit 200 configured as described above can detect the rotation period of the rotation detection signal FG1 and output the detected rotation period by each of the flip-flops 211 to 213.
Specifically, in this embodiment, the output SP1 is “H” when the rotation period of the rotor is less than 117 ms, and “L” otherwise. Similarly, each output SP2 is set to “H” only when the rotation period is 117 to 132 ms (117 ms or more and less than 132 ms, and so on), and the output SP3 is set to “H” only when the rotation period is 132 to 140 ms. Further, since the output Q of the flip-flop 210 is set to “H” only when the rotation period is 140 ms or more, the inverted signal XQ (inverted signal XSP4 of SP4) is normally “H”, and when the rotation period is 140 ms or more. Only “L”.

  That is, centering on the reference period (8 Hz = 125 ms), when it is substantially matched with the reference period (rotation period is 117 to 132 ms), one step in the direction faster than that period (rotation period is less than 117 ms), slow direction In addition, the rotation period can be detected in a total of four stages of two stages (the rotation period is 132 to 140 ms and 140 ms or more).

  The brake amount correction circuit 300 includes a NOR gate 301 and a NAND gate 302, and outputs the correction signals H01 and H02 shown in FIG. 6 using the outputs Q9 to Q12 of the frequency divider circuit 54. ing.

The signal selection circuit 400 includes an OR gate 401, AND gates 402 to 404, and an OR gate 405, and includes an output QD of the up / down counter 60, outputs SP1 to SP3, and correction signals H01 to H02. And the output QD is adjusted by the correction signals H01 and H02 corresponding to the output that is the H level signal among the outputs SP1 to SP3, and each brake control signal CH3 is output.
If the output SP2 is an H level signal, the output QD is not corrected and becomes the brake control signal CH3 as it is. Further, when the rotation period is 140 ms or more, since all of SP1 to SP3 are L level signals, the brake control signal CH3 is also an L level signal.

  Each of the correction signals H01 and H02 applies a weak brake from a control timing for applying a strong brake (strong brake control), that is, a change timing from the H level to the L level of the brake control signal CH3 that changes according to the output QD of the up / down counter 60. This is a signal for correcting the change timing to the control to be applied (weak brake control) according to the outputs SP1 to SP3 of the rotation cycle detection circuit 200, that is, the rotation cycle of the rotor.

That is, as shown in FIGS. 6 and 7, the correction signal H01 changes to an H level signal in accordance with the rising timing of the output Q12, and changes to an L level signal after one cycle of Q8 (128 Hz), that is, about 7.8 ms. It is set to be.
On the other hand, the correction signal H02 changes to an L level signal for one cycle of Q8 (128 Hz), that is, about 7.8 ms before the rise timing of the output Q12, and changes to an H level signal in accordance with the rise of the output Q12. It is set to be.

  In the present invention, the strong brake and the weak brake are relative, and the strong brake means that the braking force is stronger than the weak brake. The specific braking force in each brake, that is, the duty ratio and frequency of the chopper brake signal may be set as appropriate in implementation.

Next, the operation in this embodiment will be described with reference to the timing charts of FIGS. 4 to 7 and the flowchart of FIG.
When the generator 2 starts to operate and an L level system reset signal SR is input from the initialization circuit 90 to the LOAD input of the up / down counter 60, an up count signal based on the rotation detection signal FG1 as shown in FIG. Then, the down count signal based on the reference signal fs is counted by the up / down counter 60 (step 1, hereinafter, step is abbreviated as “S”). These signals are set so as not to be simultaneously input to the counter 60 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 from the output QD becomes the brake control signal of the chopper signal generator 80. It is output to the generation circuit 81.
On the other hand, when the count down signal is input and the counter value returns to “7”, an L level signal is output from the output QD.

  As shown in FIG. 5, the brake control signal generation circuit 81 of the chopper signal generation unit 80 uses the outputs Q5 to Q8 of the frequency dividing circuit 54 to output the chopper signals CH1 and CH2.

  The brake control signal CH3 is output based on the output QD of the up / down counter 60 input to the brake control signal generation circuit 81. At this time, the brake control signal generation circuit 81 detects the rotation cycle of the rotor in units of one cycle (S2), and based on the detected rotation cycle, predetermined correction signals H01 and H02 are added to the brake control signal CH3. The strong braking time is adjusted.

  That is, as shown in FIG. 7, when the rotation period of the rotor is less than 117 ms (reference signal fs = 8 Hz, when the rotation period is faster than 125 ms, S3), SP1 becomes the H level signal, so the brake control signal CH3 Is a signal obtained by combining the output QD and the correction signal H01 by the OR gate 401, that is, the correction signal H01 (time t1 in FIG. 7) after the fall of the output QD, that is, the fall time is late, that is, a strong brake is applied. A signal indicating that the strong braking time is extended is obtained (S4).

  Similarly, when the rotation period of the rotor is 117 to 132 ms (substantially the same as the reference signal period, S5), SP2 becomes an H level signal, so the brake control signal CH3 is a signal in which the output QD is output as it is ( S6).

  In addition, when the rotor rotation period is 132 to 140 ms (S7 when slower than the reference signal period), SP3 becomes an H level signal, so that the brake control signal CH3 uses the output QD and the correction signal H02 as the AND gate 406. In other words, the signal is a signal with a shorter fall time, that is, a shorter strong brake time (S8) than the signal synthesized at step S4, that is, the correction signal H02 (time t2 in FIG. 7).

  Further, when the rotation period of the rotor is 140 ms or more (S9), since XSP4 becomes an L level signal, SP1 to SP3 all become L level signals, and the brake control signal CH3 also becomes an L level signal (S10).

And brake control is performed by the brake control signal CH3 corrected according to this rotation cycle (S11).
Specifically, when an L level signal is output from the brake control signal CH3, the output CH4 is also an L level signal. Therefore, as shown in FIG. 5, the output CH5 from the NOR gate 85 is a chopper signal obtained by inverting the output CH1, that is, the H level period (brake off period) is as long as 15/16, and the L level period (brake on) (Period) is as short as 1/16, that is, a (1/16) chopper signal with a small duty ratio (the ratio of turning on the switches 21 and 22) for performing weak brake control. Therefore, the weak brake control giving priority to the generated power is performed on the generator 2.

  On the other hand, when the H level signal is output from the brake control signal CH3 (count value “8” or more), the chopper signal CH2 is output as it is from the AND gate 84, and the output CH4 is the same as the chopper signal CH2. . Therefore, the output CH5 from the NOR gate 85 is a chopper signal obtained by inverting the output CH2, that is, the H level period (brake off period) is as short as 1/16 and the L level period (brake on period) is as short as 15/16. That is, it becomes a (15/16) chopper signal having a large duty ratio for performing the strong brake control. Therefore, the chopper signal CH5 becomes an H level signal at a constant period although the total time of the L level signal for applying the short brake to the generator 2 becomes longer and strong braking control is performed for the generator 2. Since the short brake is turned off, choppering control is performed, and the braking torque can be improved while suppressing the decrease in the generated power.

Therefore, strong brake control is performed with a chopper signal having a large duty ratio while an H level signal is output from the output QD of the up / down counter 60, and a chopper signal having a small duty ratio is output while an L level signal is output. The weak brake control is performed. That is, the strong brake control and the weak brake control are switched by the up / down counter 60 which is a brake control device.
At this time, as described above, the cycle of the rotation detection signal FG1 of the rotor is detected by the rotation cycle detection circuit 200, and whether the rotation cycle is substantially equal to the reference signal cycle or faster (one step) or slower ( (2 stages), which are divided into a total of 4 stages, and according to them, the time during which the strong brake control is performed by the brake control signal CH3, that is, the period of the H level signal is adjusted.

  That is, when the rotation cycle of the rotation detection signal FG1 is faster than the reference signal cycle (less than 117 ms), the brake control signal CH3 has a stronger brake control time by the correction signal H01 than when the output QD falls. Signal. As a result, a stronger brake than usual is applied to the rotor, so that the rotor is quickly adjusted to the reference period.

On the other hand, when the rotation cycle of the rotation detection signal FG1 is slower than the reference signal cycle (132 to 140 ms), the correction signal H02 is added to make the brake control signal CH3 the correction signal H02 than when the output QD falls. As a result, a strong brake control time is shortened. Thereby, since the braking force to the rotor is weakened, the rotational speed of the rotor is increased and the speed is quickly adjusted to the reference period.
By repeating such brake control, the generator 2 becomes close to the set rotation speed, and as shown in FIG. 4, the up counter signal and the down counter signal are alternately input, and the counter value becomes “ It shifts to a locked state in which “8” and “7” are repeated. Also at this time, the strong brake control and the weak brake control are repeated according to the counter value and the rotation cycle.

  In addition, when the rotor rotation period becomes 140 ms or more when the strong brake control is continued due to disturbance or the like, and the strong brake control is continued as a result, the brake control signal CH3 is not related to the output QD. Until the rotation period becomes less than 140 ms, it always becomes an L level signal. Therefore, even when the output QD becomes H level, when the rotation period of the rotor is slow, the strong brake control state is not continued and the rotor is stopped, so that the rotor can be reliably prevented from stopping.

  Therefore, in this embodiment, the brake amount is corrected (correction signal) according to the rotation period of the generator 2 by the brake control signal generation circuit 81 including the rotation period detection circuit 200, the brake amount correction circuit 300, and the signal selection circuit 400. A brake amount correction device (brake control device 55) that adds H01 and H02) is configured, and when the rotation cycle of the generator 2 is as slow as 140 ms or more, the weak brake control is continued and the generator 2 is stopped. A generator stop prevention device 56 that prioritizes prevention is configured.

  In the present embodiment, the first set cycle is set to 140 ms, and the first brake set value is set to the brake amount by a chopper signal having a duty ratio of 1/16.

According to this embodiment, there are the following effects.
(1) When generating the brake control signal CH3 for controlling the brake of the generator 2 in the brake control signal generation circuit 81, the rotation period of the rotor is detected, and the rotation period is not less than the first set period (140 ms) Is provided with a generator stop prevention device 56 that performs a weak brake control with a chopper signal having a duty ratio of 1/16, using the brake control signal CH3 as an L level signal. The generator 2 can be reliably prevented from stopping.
For this reason, it is possible to prevent the generator 2 from stopping due to excessive braking and shortening the duration, and the duration of the electronically controlled mechanical timepiece can be ensured as designed.
Further, since the generator 2 is temporarily stopped and is not driven again, the indication error of the pointer 4 can be eliminated.

(2) When the brake control signal generation circuit 81 generates the brake control signal CH3, the brake control signal CH3 is appropriately adjusted using the correction signals H01 and H02 selected according to the rotation period of the rotor. Therefore, the rotation period of the rotor can be adjusted so as to quickly approach the reference signal.
As a result, the optimum brake control according to the rotation cycle of the generator 2 can be performed regardless of the reference cycle, and therefore, compared with the case where the brake-on control and the brake-off control are always performed in one cycle of the reference cycle. Thus, a reliable and sufficient brake amount can be provided, and the response of the speed control can be improved. For this reason, the dispersion | variation in the rotation period of the rotor of the generator 2 can be made small, and the generator 2 can be stably rotated at a substantially constant speed.

  (3) When correcting the brake amount, the rotation cycle for setting the brake amount is the cycle before actually applying the brake. At the time of applying the brake, the brake is too strong and the generator 2 stops. However, in this embodiment, since the generator stop prevention device 56 is provided, the generator 2 is stopped regardless of the setting of the correction amount. Can be prevented. For this reason, the correction value of the brake amount can be set more dynamically, and the responsiveness of the speed control can be further enhanced.

  (4) Since the control is performed using a chopper signal with a large duty ratio during the strong brake control, the braking torque can be increased while suppressing the decrease in the charging voltage, and the system can be efficiently maintained while maintaining the stability of the system. Brake control can be performed. Thereby, the duration of the electronically controlled mechanical timepiece can also be increased.

  (5) Since the chopper is controlled by the chopper signal having a small duty ratio even during the weak brake control, the charging voltage while the weak brake is applied can be further improved.

  (6) Since switching between the strong brake control and the weak brake control is set only depending on whether the counter value is “7” or less or “8” or more, the rotation control device 50 can be configured simply. Parts costs and manufacturing costs can be reduced, and electronically controlled mechanical watches can be provided at low cost.

  (7) Since the timing at which the up counter signal is input changes according to the rotational speed of the generator 2, the period during which the counter value is “8”, that is, the time during which the brake is applied can be automatically adjusted. it can. For this reason, particularly in the locked state where the up-counter signal and the down-count signal are alternately input, stable control with a quick response can be performed.

  (8) Since the up / down counter 60 is used as the brake control device, the comparison (difference) between the count values can be automatically calculated simultaneously with the count of the up counter signal and the down counter signal. And the difference between the respective count values can be easily obtained.

  (9) Since the 4-bit up / down counter 60 is used, 16 count values can be counted. For this reason, when the up counter signal is continuously input, the input value can be accumulated and counted, and the set range, that is, the up counter signal and the down counter signal are continuously input and the counter value is counted. In the range up to “15” or “0”, the accumulated error can be corrected. For this reason, even if the rotational speed of the generator 2 deviates significantly from the reference speed, it takes time until the locked state is reached. However, the accumulated error is reliably corrected and the rotational speed of the generator 2 is returned to the reference speed. In the long term, accurate hand movement can be maintained.

  (10) The initialization circuit 90 is provided so that the brake control is not performed until the power supply circuit 6 at the time of starting the generator 2 is charged to a predetermined voltage so that the generator 2 is not braked. Therefore, priority can be given to the charging of the power supply circuit 6, the rotation control device 50 driven by the power supply circuit 6 can be driven quickly and stably, and the stability of the subsequent rotation control can be improved. .

(11) Since the brake control signal generation circuit 81 is formed using various logic circuits, the circuit can be reduced in size and power can be saved. In particular, since the rotation period detection circuit 200 uses flip-flops 210 to 213 and the like, the circuit configuration can be simplified and the data can be easily used as compared with the case where other rotation detectors or the like are used.
In addition, the brake control signal generation circuit 81 includes a brake amount correction device that corrects the brake amount according to the rotation cycle of the generator 2 and a generator stop that gives priority to preventing the stop of the generator 2 by continuing weak brake control. Since the prevention device 56 is also used, the circuit configuration can be simplified and the cost can be reduced as compared with the case where these are configured as separate circuits.

  It should be noted that the present invention is not limited to each embodiment, and modifications, improvements, etc. within a scope that can achieve the object of the present invention are included in the present invention.

  For example, the duty ratio of the chopper signal in the chopper signal generator 80 is not limited to 1/16 or 15/16 as in the above-described embodiment, and may be other values such as 14/16, for example. Furthermore, the duty ratio of the chopper signal may be 28/32, 31/32, etc., and the change of the duty ratio may be 32 stages instead of 16 stages. At this time, as a chopper signal used at the time of strong brake control, the duty ratio is preferably in the range of about 0.75 to 0.97, and if it is in the range of about 0.75 to 0.89, The charging voltage can be further improved. If the charging voltage is set to a high range of 0.90 to 0.97, the braking force can be further increased.

  Furthermore, in each embodiment, the chopper signal used at the time of weak brake control should just be made into the low range whose duty ratio is about 1/16-1/32. In short, the duty ratio and frequency of each chopper signal may be set as appropriate during implementation. In this case, for example, if the frequency is set to a high frequency range of 500 to 1100 Hz, the charging voltage can be further improved. On the other hand, if the frequency is in the low range of 25 to 50 Hz, the braking force can be further increased. For this reason, by changing the frequency of each chopper signal as well as the duty ratio, the charging voltage and the braking force can be further increased.

Further, the first brake set value in the generator stop prevention device 56 may be one used at the time of weak brake control (a chopper signal having a low duty ratio of about 1/16 to 1/32), or a brake further than this. The value may be a small value or may be set to 0 (zero) as the brake amount.
The first brake set value may be a value that can prevent the generator 2 from stopping even when the rotation period becomes equal to or longer than the first set period (for example, 140 ms). Specifically, the present invention is applied. What is necessary is just to set suitably from experiment etc. according to an electronic device.

  Further, when the chopper signal is switched by the counter value of the up / down counter 60, the counter value is not limited to the one in which the counter value is switched in three stages of less than “8”, “8”, and “9” or more. For example, the counter value may be switched between less than “8”, “8-9”, and “10-15”, and these values may be set as appropriate in implementation.

  Although the 4-bit up / down counter 60 is used as the brake control device, 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. If an up / down counter with a large number of bits is used, the number of values that can be counted increases, so the range in which the accumulated error can be stored can be increased, and control in an unlocked state such as immediately after the generator 2 is started is particularly 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, when the lock state is entered, the up and down operations are repeated. There is an advantage that can be reduced.

  Further, the brake control device is not limited to the up / down counter, and the first and second counting means provided for the reference signal fs and the rotation detection signal FG1, respectively, and a comparison circuit that compares the count values of the respective counting means. It may be composed of However, the use of the up / down counter 60 has an advantage that the circuit configuration is simplified.

  Further, the brake control device may be a device that detects a power generation voltage, a rotation cycle (speed), etc. of the generator 2 and controls the brake based on the detected value. Good.

Furthermore, in the above-described embodiment, the brake control is performed using two types of chopper signals having different duty ratios and frequencies during strong brake control. However, three or more types of chopper signals having different duty ratios and frequencies may be used. Furthermore, the frequency and the duty ratio may be changed continuously as in frequency modulation, instead of stepwise.
When brake control is performed with three or more types of chopper signals whose frequency and duty ratio change continuously as described above, the first brake set value at the time of generator stop prevention control is the value among these brake control signals. It is sufficient to use the same or less than the one with the smallest brake amount.
However, the brake amount is not limited to the smallest brake amount, and a brake amount larger than the minimum brake amount may be set as the first brake set value as long as the generator 2 does not stop.

Moreover, in the said embodiment, although the brake force of the rotor was controlled using the chopper signal, you may control a brake without using a chopper signal. For example, by inverting the brake control signal CH3 from the brake control signal generation circuit 81 through an inverter or the like to obtain the brake signal CH5, the brake is continuously applied when the brake control signal CH3 is at the H level, and when the brake control signal CH3 is at the L level. Alternatively, the brake may be controlled by turning off the brake.
In this case, the first brake set value may be brake off, that is, the brake amount is zero.

  Further, in each of the above embodiments, the strong brake control and the weak brake control are performed using two types of chopper signals, but the strong brake control using the chopper signals and the brake off control for completely turning off the brakes are provided. You can adjust the speed with. Also in this case, the first brake set value may be set to brake off, that is, the brake amount 0.

  Furthermore, the correction value set by the brake amount correction circuit 300 is not limited to the two-stage value in the above-described embodiment, but may be one or more stages, and may be set as appropriate in the implementation. For example, in each of the above-described embodiments, the correction is performed both when the reference period is faster and later than the reference period, except for the case where the correction is not substantially performed with the reference period as the center. Correction may be made only in one of cases where the period is faster or slower than the period. At this time, the correction value may be adjusted in one step (two steps including the case of no correction) or may be adjusted in two or more steps. However, as in each of the above-described embodiments, there is an advantage that the speed control can be performed more quickly if correction is made both when it is faster and slower than the reference period.

  Moreover, you may set a correction value so that it may change continuously according to the rotation period of a generator. In this case, finer adjustment can be performed. However, if the correction value is set in advance as in the above embodiments, there is an advantage that the configuration of the brake amount correction circuit 300 can be simplified.

The rotation period detected by the rotation period detection circuit 200 may be set as appropriate according to this correction stage.
Further, the specific correction amount of the correction signals H01 and H02 set by the brake amount correction circuit 300 and the range of the rotation cycle using the correction signals H01 and H02 may be set as appropriate in the implementation.

  Further, in the present invention, the configuration for correcting the brake amount with the correction signals H01 and H02 is not necessarily required, and the brake is turned on (including strong brake control) and brake off (including weak brake control) using the output QD as it is. Brake control may be performed by switching to. Also in this case, the generator stop prevention device 56 may be configured to prevent the generator 2 from being stopped by the brake-off control if the rotation period is equal to or greater than the first set period regardless of the brake control. .

  The specific configurations of the rectifier circuit 5, the brake circuit 20, the control circuit 53, the chopper signal generation unit 80, etc. are not limited to the above embodiments, and the brake control of the generator 2 of the electronically controlled mechanical timepiece is controlled by chopper control or the like. Anything is possible. In particular, the rectifier circuit 5 is not limited to the configuration of the above-described embodiment using chopper boosting, and may be configured to include, for example, a booster circuit that boosts voltage by switching a connection of a plurality of capacitors. What is necessary is just to set suitably according to the kind etc. of the electronically controlled mechanical timepiece incorporating the machine 2 and a rectifier circuit.

  Furthermore, the switches having both ends of the generator 2 as closed loops are not limited to the switches 21 and 22 of the above embodiment. For example, when a resistance element is connected to a transistor and each transistor is turned on by a chopper signal to make both ends of the generator 2 a closed loop, the resistance element may be arranged in the path. In short, any switch may be used as long as both ends of the generator 2 can be closed loop.

  In addition, the present invention is not limited to those applied to the electronically controlled mechanical timepiece as in the above-described embodiment, but includes various types of timepieces such as table clocks and clocks, portable timepieces, portable sphygmomanometers, cellular phones, pagers, all steps The present invention can also be applied to various electronic devices such as a meter (registered trademark), a calculator, a portable personal computer, an electronic notebook, a portable radio, a music box, a metronome, and an electric razor.

For example, if the present invention is applied to a music box, the generator does not stop, it can be operated for a long time, and an accurate performance can be performed for a long time.
In addition, when the present invention is applied to a metronome, a metronome sound transmitting vehicle is attached to the gear wheel of the train wheel, and the metronome sound piece may be played by the rotation of the vehicle to generate a periodic metronome sound. . The metronome needs to generate sounds that correspond to various tempos.In this case, the frequency of the reference signal from the oscillation circuit can be changed by changing the frequency division stage of the crystal unit. That's fine.

In addition, the first setting cycle in which the generator stop prevention device 56 operates is not limited to 140 ms, and may be set as appropriate according to the type of electronic device to which the present invention is applied.
In designing the first set cycle, the cycle in which the generator stops unless the brake amount of the generator 2 is actually switched to the first brake set value and the brake amount of the generator 2 are set to the first set cycle. What is necessary is just to obtain | require by experiment etc. the period which the generator 2 oscillates if it switches to 1 brake setting value, and sets it to the period between these periods.

Further, the mechanical energy source is not limited to the mainspring, but may be a rubber, a spring, a weight, or the like, and may be set as appropriate according to an object to which the present invention is applied.
In addition, the energy transmission device that transmits mechanical energy from a mechanical energy source such as a spring to the generator is not limited to the train wheel (gear) as in each of the above embodiments, but includes a friction wheel, a belt, a pulley, and a chain. In addition, a sprocket wheel, a rack and pinion, a cam, or the like may be used, and may be set as appropriate according to the type of electronic device to which the present invention is applied.

  In addition, the rotation control device of the present invention may be configured by hardware and incorporated in the electronic device in advance, but the electronic device includes a computer function, that is, a CPU (Central Processing Unit), a memory, a hard disk, and the like. In this case, the rotation control device may be realized using software by installing (incorporating) a control program via a recording medium such as a CD-ROM or a communication means such as the Internet.

It is a block diagram which shows the structure of the principal part of the electronically controlled mechanical timepiece in one Embodiment of this invention. It is a circuit diagram which shows the structure of the electronically controlled mechanical timepiece of the embodiment. It is a circuit diagram which shows the structure of the brake control signal generation circuit of the said embodiment. It is a timing chart in the up-down counter of the embodiment. It is a timing chart in the chopper signal generation part of the embodiment. It is a timing chart in the chopper signal generation part of the embodiment. It is a timing chart in the brake control signal generation circuit of the embodiment. It is a flowchart explaining operation | movement of the said embodiment.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Spring, 2 ... Generator, 3 ... Speed-up wheel train, 4 ... Pointer, 5 ... Voltage doubler rectifier circuit, 6 ... Power supply circuit, 20 ... Brake circuit, 21, 22 ... Switch, 23 ... Capacitor, 24, 25 DESCRIPTION OF SYMBOLS ... Diode, 27-29 ... Field effect transistor, 50 ... Rotation control device, 51 ... Oscillation circuit, 51A ... Crystal oscillator, 52 ... Detection circuit, 53 ... Control circuit, 54 ... Frequency division circuit, 55 ... Brake control device 56 ... Generator stop prevention device, 60 ... Up / down counter, 61 ... Waveform shaping circuit, 62 ... Mono multivibrator, 70 ... Synchronization circuit, 80 ... Chopper signal generator, 81 ... Brake control signal generation circuit, 90 ... Initial , 200... Rotation cycle detection circuit, 201... Frequency dividing circuit, 300.

Claims (8)

A mainspring, a speed increasing wheel train as an energy transmission device that transmits the torque of the mainspring, a pointer that is connected to the speed increasing wheel train to display the time, and is driven by the mainspring to generate an induced electric power In an electronically controlled mechanical timepiece comprising: a generator that supplies dynamic energy; and a rotation control device that is driven by the electrical energy and controls a rotation period of the generator.
The rotation control device includes:
A brake control means for performing brake control of the generator by comparing a reference signal generated based on a signal from a time standard source and a rotation detection signal corresponding to a rotation period of the generator;
When the rotation cycle of the generator is measured and the rotation cycle is equal to or longer than a first set cycle longer than a reference cycle, the brake amount of the generator is set to a first brake set value and the generator A generator stop prevention means for preventing the stop,
The first set period is
If the brake amount of the generator is not switched to the first brake setting value, the upper limit is the period at which the generator stops.
And if the brake amount of the generator is switched to the first brake set value, the fluctuation range of the rotation cycle of the generator becomes large, and the cycle in which the brake is applied for one cycle or more and is not applied is set to the lower limit. age,
An electronically controlled mechanical timepiece set with a period between these upper and lower limits .   The electronically controlled mechanical timepiece according to claim 1,
  The electronically controlled mechanical timepiece, wherein the first brake set value is set to a value that makes a brake amount zero.   The electronically controlled mechanical timepiece according to claim 1,
  The electronically controlled mechanical timepiece, wherein the first brake set value is set to a value equal to or less than a minimum brake amount among brake amounts that can be set by the brake control means.   The electronically controlled mechanical timepiece according to any one of claims 1 to 3,
  The generator stop prevention means sets the brake amount of the generator to the first brake set value in synchronization with the rotation cycle of the generator.   A mainspring, a speed increasing wheel train as an energy transmission device that transmits the torque of the mainspring, a pointer that is connected to the speed increasing wheel train to display the time, and is driven by the mainspring to generate an induced electric power A control program for an electronically controlled mechanical timepiece comprising: a generator for supplying static energy; and a rotation control device that is driven by the electrical energy and controls a rotation cycle of the generator,
  The rotation control device;
  A brake control means for performing brake control of the generator by comparing a reference signal generated based on a signal from a time standard source and a rotation detection signal corresponding to a rotation period of the generator;
  The rotation cycle of the generator is measured, and the rotation cycle is longer than a reference cycle, and the cycle in which the generator stops unless the brake amount of the generator is switched to the first brake set value is set as the upper limit. In addition, if the brake amount of the generator is switched to the first brake set value, the fluctuation range of the rotation cycle of the generator becomes large, and the cycle in which the brake is applied or not applied over one cycle is set. The lower limit is set and the brake amount of the generator is set to the first brake set value to prevent the generator from being stopped when it is equal to or longer than the first set cycle set in the cycle between these upper and lower limits. A control program for an electronically controlled mechanical timepiece, which functions as a generator stop prevention means.   A mainspring, a speed increasing wheel train as an energy transmission device that transmits the torque of the mainspring, a pointer that is connected to the speed increasing wheel train to display the time, and is driven by the mainspring to generate an induced electric power A recording medium recording a control program of an electronically controlled mechanical timepiece comprising a generator for supplying static energy and a rotation control device that is driven by the electrical energy and controls a rotation cycle of the generator,
  The rotation control device;
  A brake control means for performing brake control of the generator by comparing a reference signal generated based on a signal from a time standard source and a rotation detection signal corresponding to a rotation period of the generator;
  The rotation cycle of the generator is measured, and the rotation cycle is longer than a reference cycle, and the cycle in which the generator stops unless the brake amount of the generator is switched to the first brake set value is set as the upper limit. In addition, if the brake amount of the generator is switched to the first brake set value, the fluctuation range of the rotation cycle of the generator becomes large, and the cycle in which the brake is applied or not applied over one cycle is set. The lower limit is set and the brake amount of the generator is set to the first brake set value to prevent the generator from being stopped when it is equal to or longer than the first set cycle set in the cycle between these upper and lower limits. A recording medium on which a program for functioning as a generator stop prevention means is recorded.   A mainspring, a speed increasing wheel train as an energy transmission device that transmits the torque of the mainspring, a pointer that is connected to the speed increasing wheel train to display the time, and is driven by the mainspring to generate an induced electric power A control method of an electronically controlled mechanical timepiece comprising a generator for supplying a mechanical energy and a rotation control device that is driven by the electrical energy and controls a rotation cycle of the generator,
  While comparing the reference signal issued based on the signal from the time standard source and the rotation detection signal corresponding to the rotation cycle of the generator, to perform the brake control of the generator,
  When the rotation period of the generator is not less than a first set period longer than a reference period, the brake amount of the generator is set to a first brake set value to prevent the generator from being stopped,
  The first set cycle has an upper limit of a cycle in which the generator stops unless the brake amount of the generator is switched to the first brake set value, and the brake amount of the generator is set to the first brake set value. If it is switched to, the fluctuation range of the rotation cycle of the generator will increase, and the cycle in which the brake will be applied or disengaged for more than one cycle is set as the lower limit, and the cycle between these upper and lower limits is set A method for controlling an electronically controlled mechanical timepiece. A mainspring, a speed increasing wheel train as an energy transmission device that transmits the torque of the mainspring, a pointer that is connected to the speed increasing wheel train to display the time, and is driven by the mainspring to generate an induced electric power A generator that supplies the energy, and a rotation control device that is driven by the electrical energy and controls the rotation period of the generator,
While comparing the reference signal issued based on the signal from the time standard source and the rotation detection signal corresponding to the rotation cycle of the generator, to perform the brake control of the generator,
When the rotation period of the generator becomes equal to or longer than a first set period longer than a reference period, the generator brake amount is set to a first brake set value to prevent the generator from being stopped. A method of designing a configured electronically controlled mechanical watch,
If the brake amount of the generator is not switched to the first brake set value, the cycle in which the generator stops is set as the upper limit, and if the brake amount of the generator is switched to the first brake set value, the power generation The fluctuation range of the rotation cycle of the machine becomes large, and the period in which the brake is applied or disengaged over one period is set as the lower limit, and the first set period is set to the period between these upper and lower limits. A method for designing an electronically controlled mechanical timepiece.

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