Timepiece, rate measurement device, rate measurement system and rate measurement method

Abstract

To provide a timepiece, a rate measurement device, a rate measurement system and a rate measurement method which can achieve rate measurement for a long time and can increase the efficiency in rate measurement work.SOLUTION: A timepiece includes a pointer displaying the time, control means for controlling the operation of the pointer, a power generator having a coil for power generation, transmission means for transmitting a rate measurement signal to a rate measurement device provided outside the timepiece through the coil for power generation for a fixed period, and a power storage device for storing electric energy generated in the coil for power generation and supplying the electric energy to the control means and the transmission means. The power storage device receives power transmitted by the rate measurement device through the coil for power generation and stores the power in the power storage device between the transmission of the rate measurement signal and the transmission of the subsequent rate measurement signal.SELECTED DRAWING: Figure 2

Description

[Technical field]

[0001] The present invention relates to a timepiece, a walk measurement device, a walk measurement system, and a walk measurement method. [Background technology]

[0002] Patent Document 1 discloses an electronically controlled mechanical timepiece that uses the generator coil as a step measurement coil as well, and measures the step by passing a current through the generator coil for a predetermined period of time at regular intervals. This electronically controlled mechanical timepiece has a step measurement mode. In the step measurement mode, the generator brake control is released to put the generator into a free-running state, and then a step measurement pulse is output. As a result, in the step measurement mode, the chopping signal is no longer output by the chopping brake control, so that the step measurement pulse can be reliably detected, and the generator continues to operate, so that the power supply circuit can continue to be charged. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] International Publication No. 00 / 031595 Summary of the Invention [Problem to be solved by the invention]

[0004] In Patent Document 1, the generator is in a free-running state in the rate measurement mode, so the speed at which the mainspring unwinds is three to four times faster than during normal hand movement. Therefore, even if it takes, for example, 72 hours for the mainspring to completely unwind from a fully wound state during normal hand movement, in which the speed is regulated by applying an electromagnetic brake to the generator, in the rate measurement mode, the mainspring will unwind in 18 to 24 hours from a fully wound state. The generator generates electricity using the torque of the mainspring and uses that electricity to output the rate measurement pulse, so when the mainspring completely unwinds, power generation stops and the rate measurement pulse can no longer be output. On the other hand, for high-precision clocks known as annual difference clocks, the finished clock is placed in a thermostatic bath and the rate is measured at three temperatures, for example, 15°C, 25°C, and 35°C. In this case, it takes time for the temperature inside the thermostatic bath to reach a set temperature, time for the inside of the clock placed in the thermostatic bath to reach the set temperature, and time to measure the rate at each temperature, so it takes about six hours to measure at one temperature, and the total time required to measure the rate at three temperatures is about 18 hours. For this reason, the mainspring of the finished watch had to be fully wound before the rate measurement, which was time-consuming.In addition, if the mainspring unwinds before the rate measurement is completed, the rate measurement must be interrupted and the spring must be fully wound again before the next rate measurement can be performed, which requires even more time and effort, lengthens the rate measurement operation time, and reduces efficiency. [Means for solving the problem]

[0005] The timepiece disclosed herein comprises hands that display the time, a control means for controlling the operation of the hands, a generator equipped with a power-generating coil, a transmission means for transmitting a walk measurement signal at regular intervals via the power-generating coil to a walk measurement device provided outside the watch, and a power storage device for storing electrical energy generated by the power-generating coil and supplying the electrical energy to the control means and the transmitting means, and is characterized in that the power storage device receives power transmitted from the walk measurement device via the power-generating coil between the transmission of one walk measurement signal and the next walk measurement signal, and stores it in the power storage device.

[0006] The walk measurement device disclosed herein is a walk measurement device that measures the walk of a watch having a power generating coil, and is characterized in that it comprises a coil that is electromagnetically coupled to the power generating coil, a receiving unit that receives a walk measurement signal transmitted from the watch at a constant cycle via the coil, and a power transmission control unit that transmits power via the coil for a predetermined period of time that is shorter than the constant cycle after receiving the walk measurement signal until the next walk measurement signal is received.

[0007] The walk measurement system disclosed herein is a walk measurement system comprising a watch and a walk measurement device provided outside the watch and measuring the walk of the watch, wherein the watch comprises hands that display the time, a control means for controlling the operation of the hands, a generator having a power generating coil, a transmission means for transmitting walk measurement signals to the walk measurement device at regular intervals via the power generating coil, and a power storage device for storing electrical energy generated in the power generating coil and supplying the electrical energy to the control means and the transmission means, wherein the walk measurement device comprises a coil that is electromagnetically coupled to the power generating coil, a receiving unit that receives the walk measurement signals transmitted from the watch at regular intervals via the coil, and a power transmission control unit that transmits power via the coil for a predetermined time shorter than the regular interval after receiving the walk measurement signal until receiving the next walk measurement signal, and wherein the power storage device stores the power transmitted from the walk measurement device via the power generating coil.

[0008] The walk measurement method disclosed herein is a walk measurement method for measuring the walk of a watch using a walk measurement device, and is characterized by comprising the steps of: placing the watch in a constant temperature bath and switching to a walk measurement mode; transmitting a walk measurement signal from the watch at a constant cycle using a power generating coil; the walk measurement device, upon receiving the walk measurement signal, transmitting power via the coil of the walk measurement device for a predetermined period shorter than the constant cycle; and storing the power transmitted from the walk measurement device via the power generating coil in a power storage device of the watch. [Brief description of the drawings]

[0009] [Figure 1] FIG. 1 is a front view showing a timepiece according to a first embodiment. [Diagram 2] FIG. 1 is a block diagram showing a timepiece according to a first embodiment. [Diagram 3] FIG. 2 is a circuit diagram showing the main parts of the timepiece of the first embodiment. [Figure 4] FIG. 4 is a diagram showing waveforms during measurement of a walk speed in the first embodiment. [Diagram 5]1 is a block diagram showing a configuration of a walk measurement device according to a first embodiment; [Figure 6] 4 is a flowchart illustrating the operation of the timepiece of the first embodiment. [Figure 7] 4 is a flowchart illustrating the operation of the walk measurement device according to the first embodiment. [Figure 8] FIG. 11 is a block diagram showing a timepiece according to a second embodiment. [Figure 9] FIG. 11 is a block diagram showing the configuration of a walk measurement device according to a second embodiment. [Figure 10] 10 is a flowchart illustrating the operation of a timepiece according to a second embodiment. [Figure 11] 10 is a flowchart illustrating the operation of the walk measurement device according to the second embodiment. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0010] [First embodiment] A timepiece 1 and a walk measurement device 100 according to a first embodiment of the present disclosure will now be described with reference to the drawings. 1 is a front view showing the timepiece 1. In this embodiment, the timepiece 1 is configured as an electronically controlled mechanical timepiece. As shown in Fig. 1, the timepiece 1 is a wristwatch worn on the wrist of a user, and has a cylindrical exterior case 2, with a dial 3 disposed on the inner circumference of the exterior case 2. Of the two openings in the exterior case 2, the opening on the front side is closed by a cover crystal, and the opening on the back side is closed by a back cover.

[0011] The timepiece 1 is equipped with a movement (not shown) housed in an exterior case 2, and hour, minute, and second hands 4A, 4B, and 4C, which are hands that display time information. A small calendar window 3A is provided on the dial 3, and a date wheel 6 can be seen through the small calendar window 3A. The dial 3 also has hour marks 3B for indicating the time, and a fan-shaped sub-dial 3C that indicates the duration with a power reserve hand 5.

[0012] A crown 7 is provided on the side of the exterior case 2. The crown 7 can be pushed toward the center of the timepiece 1 at the 0 position, and can be pulled out to the 1st and 2nd positions. When the crown 7 is pulled to the first position and rotated, the date wheel 6 moves and the date can be adjusted. When the crown 7 is pulled to the second position, the hour hand 4A, minute hand 4B and second hand 4C stop, and when the crown 7 is rotated in the second position, the hour hand 4A and minute hand 4B move and the time can be adjusted. The method of adjusting the date wheel 6, hour hand 4A and minute hand 4B using the crown 7 is the same as that of conventional watches, so a description will be omitted.

[0013] Furthermore, when the crown 7 is rotated at the 0 position, the mainspring 40, which will be described later, can be wound. The power reserve hand 5 moves in conjunction with the winding of the mainspring 40. The timepiece 1 of this embodiment can ensure a running time of approximately 72 hours when the mainspring 40 is fully wound. Furthermore, if the crown 7 is kept pulled out to the second position, the timepiece 1 transitions to a walk measurement mode, which will be described later.

[0014] FIG. 2 is a block diagram showing a schematic configuration of the timepiece 1. The timepiece 1 is an electronically controlled mechanical timepiece that includes a mainspring 40 as a mechanical energy source, a wheel train 41 that transmits the mechanical energy supplied from the mainspring 40, a display device 42 that is connected to the wheel train 41 and displays the time, a generator 50 that also serves as a regulator and is driven by the mechanical energy transmitted via the wheel train 41, a rectifier circuit 60, a power storage device 70, a quartz crystal oscillator 8, and a rotation control device 10.

[0015] The wheel train 41 is a speed-increasing wheel train made up of multiple gears that accelerates and transmits the rotation of the barrel in which the mainspring 40 is housed to a rotor 51 of a generator 50, which will be described later. The multiple gears that make up the wheel train 41 are connected to hour hand 4A, minute hand 4B, and second hand 4C, which move in accordance with the rotation of the wheel train 41. The display device 42 includes an hour hand 4A, a minute hand 4B, and a second hand 4C, as well as a power reserve hand 5. The power reserve hand 5 moves by a power reserve train wheel (not shown) that is linked to the winding and unwinding of the mainspring 40.

[0016] [Generator] 2, the generator 50 includes a rotor 51 and a power generation coil 52 that generates an induced electromotive force as the rotor 51 rotates, and supplies electric energy. The rotor 51 is a typical rotor magnetized with two poles, and is driven by the spring 40 via the gear train 41. The generator 50 generates electricity by generating an induced electromotive force in the power generation coil 52 as the rotor 51 rotates, changing the magnetic flux. As shown in FIG. 3, output terminals MG1, MG2 of power generating coil 52 of generator 50 are connected to a brake circuit 55 controlled by a braking control circuit 14, which will be described later, and a rectifier circuit 60.

[0017] [Electricity storage device] The rectifier circuit 60 is connected to the power storage device 70. The power storage device 70 is configured with a capacitor connected between a first power supply line 81 and a second power supply line 82.

[0018] [Brake circuit] The brake circuit 55 applies a brake to the rotation of the rotor 51 in order to make the generator 50 function as a speed governor. The brake circuit 55 has a first chopping transistor 56 connected to a first output terminal MG1 from which an AC signal (AC current) generated by the generator 50 is output, and a second chopping transistor 57 connected to a second output terminal MG2 from which the AC signal is output. By turning on the chopping transistors 56 and 57, the output terminals MG1 and MG2 are short-circuited to create a closed loop state, and a short brake is applied to the generator 50. As shown in FIG. 3, these chopping transistors 56, 57 are first and second transistors connected between a first power supply line 81 connected to the power storage device 70 and output terminals MG1, MG2.

[0019] Each chopping transistor 56, 57 is composed of a P-channel field effect transistor. Control signals P1, P2 are input from the braking control circuit 14 to the gates of each chopping transistor 56, 57, respectively. Therefore, each chopping transistor 56, 57 is maintained in the ON state while the control signals P1, P2 are at the L level. On the other hand, while the control signals P1, P2 are at the H level, each chopping transistor 56, 57 is maintained in the OFF state, and no braking is applied to the generator 50. In other words, the ON / OFF of each chopping transistor 56, 57 is controlled by the level of the control signals P1, P2, and the generator 50 can be chopped and controlled.

[0020] Here, the control signals P1 and P2 are, for example, 128 Hz signals, and the braking force of the generator 50 is adjusted by changing the duty ratio. That is, as the period during which the control signals P1 and P2 are at the L level becomes longer in one cycle, the period during which the chopping transistors 56 and 57 are maintained in the ON state and short braking is applied becomes longer, and the braking force increases. On the other hand, as the period during which the control signals P1 and P2 are at the L level becomes shorter in one cycle, the braking force decreases. Therefore, the braking force can be adjusted by the duty ratio of the control signals P1 and P2. During chopping control, the control signals P1, P2 simultaneously control the chopping transistors 56, 57 to the on or off state. On the other hand, as will be described later, during transmission of a step measurement pulse, which is a step measurement signal, the chopping transistors 56, 57 are controlled separately, so the braking control circuit 14 is set to output separate control signals P1, P2 to each of the chopping transistors 56, 57.

[0021] [Rectifier circuit] The rectifier circuit 60 includes a step-up rectifier, a full-wave rectifier, a half-wave rectifier, a transistor rectifier, etc., and steps up and rectifies the AC output from the generator 50 to charge and supply the power storage device 70. As shown in Fig. 3, the rectifier circuit 60 of this embodiment includes a first rectifier switch 61, a second rectifier switch 62, a diode 65, a diode 66, and a step-up capacitor 67. The first rectifier switch 61 is connected in parallel with the first chopping transistor 56 of the brake circuit 55 and is composed of a first rectifier transistor having a gate connected to the second output terminal MG2. Similarly, the second rectification switch 62 is connected in parallel with the second chopping transistor 57 and is composed of a second rectification transistor having a gate connected to the first output terminal MG1. Each of these rectification transistors is composed of a P-channel field effect transistor. Any type of diodes 65 and 66 can be used as long as they are unidirectional elements that allow current to flow in one direction. In particular, because the electromotive force of generator 50 in timepiece 1 is small, it is preferable to use a silicon diode, which has a small reverse leakage current, as diode 65, and a Schottky barrier diode, which has a small voltage drop, as diode 66.

[0022] In this embodiment, as shown in Fig. 3, the first chopping transistor 56, the second chopping transistor 57, the first rectifier switch 61, the second rectifier switch 62, the diode 65, and the diode 66 are configured within the IC, just like the rotation control device 10, while the rotor 51 and the power generating coil 52 of the generator 50, the boost capacitor 67, and the power storage device 70 are provided outside the IC. By configuring part of the rectifier circuit 60 within the IC in this way, the number of elements mounted on the circuit board of the timepiece 1 can be reduced, which has the effect of reducing costs. Furthermore, by using an IC manufactured by an IC manufacturing process with a small leakage current, the leakage current can also be reduced. The capacity, i.e., size, of each of the chopping transistors 56 and 57 may be set based on the current during chopping in the generator 50.

[0023] Since such a rectifier circuit 60 includes a boost capacitor 67, the charge stored in the boost capacitor 67 during the charging process is also used to charge the power storage device 70. This increases the voltage that can be applied to the ICs that make up the rotation control device 10, allowing stable operation of the ICs to be achieved. Note that, although the rectifier circuit 60 in Fig. 3 is a two-stage boost rectifier circuit, it is also possible to increase the number of boost stages, such as three-stage or four-stage boost, by using diodes and capacitors to increase the voltage of the power storage device 70.

[0024] [Configuration of rotation control device] 2 and 3, a description will be given of the configuration of the rotation control device 10 that controls the rotation of the rotor 51 of the generator 50. The rotation control device 10 is a control means that controls the rotation speed of the train wheel 41, i.e., the operation of each of the hands of the hour hand 4A, minute hand 4B, and second hand 4C, by controlling the rotation of the rotor 51. The rotation control device 10 is configured by ICs, and includes an oscillator circuit 11, a frequency divider circuit 12, a rotation detection circuit 13, a braking control circuit 14, and a rate measurement signal transmission circuit 91 of a transmission means 90. Note that IC is an abbreviation for Integrated Circuit.

[0025] The oscillator circuit 11 is driven when the voltage of the power storage device 70 becomes high, and causes the crystal oscillator 8, which is an oscillation signal generating source, to oscillate. Then, the oscillation signal (32768 Hz) of the crystal oscillator 8 is output to the frequency division circuit 12, which is made up of a flip-flop. The oscillator circuit 11 is a general circuit for oscillating the crystal oscillator 8, which is equipped with an oscillation inverter, an adjustment capacitor, etc., and is configured so that the frequency of the oscillation signal can be adjusted by changing the connection time or number of connections of the adjustment capacitor.

[0026] The frequency divider circuit 12 divides the oscillation signal to generate clock signals of multiple frequencies, for example, 2 kHz to 1 Hz, and outputs the clock signals required by the brake control circuit 14 and the rate measurement signal transmitting circuit 91. Here, the clock signal output from the frequency divider circuit 12 to the brake control circuit 14 is a reference signal fs1 that serves as a reference for controlling the rotation of the rotor 51, as will be described later.

[0027] The rotation detection circuit 13 is composed of a waveform shaping circuit and a mono multivibrator (not shown) connected to the generator 50, and outputs a rotation detection signal FG1 that indicates the rotation frequency of the rotor 51 of the generator 50. The waveform shaping circuit is composed of a comparator, and converts a sine wave into a square wave by comparing the voltage generated at the output terminal MG1 with a predetermined reference potential and outputting the result. The mono multivibrator functions as a band pass filter that passes only pulses with a certain period or less, and outputs the rotation detection signal FG1 with noise removed.

[0028] The brake control circuit 14 compares the rotation detection signal FG1 output from the rotation detection circuit 13 with the reference signal fs1 output from the frequency divider circuit 12, and outputs control signals P1 and P2 to the brake circuit 55 for regulating the speed of the generator 50. The reference signal fs1 is a signal that is set to a reference rotation speed of the rotor 51 during normal hand movement, for example, 8 Hz. Therefore, the brake control circuit 14 changes the duty ratio of the control signals P1 and P2 according to the difference between the rotation detection signal FG1 indicating the rotation speed of the rotor 51 and the reference signal fs1, and controls the on-time of the chopping transistors 56 and 57 of the brake circuit 55 to adjust the braking force and control the rotation speed of the rotor 51, i.e., the gear train 41.

[0029] [Transmission method] The transmitting means 90 transmits a step measurement pulse to the external adjustment device via the power generating coil 52 when the mode switches to the step measurement mode, and as shown in FIG. 3, includes a step measurement signal transmitting circuit 91 and a transmitting transistor 93. In the walk measurement mode, the walk measurement signal transmitting circuit 91 outputs walk measurement pulses at one-second intervals, as shown in Fig. 4. Specifically, the walk measurement signal transmitting circuit 91 operates using the oscillation signal output from the frequency dividing circuit 12, and before time T1 at which the walk measurement pulse of 1 Hz is output, it outputs control signals P1, P2 via the braking control circuit 14 to turn on chopping transistors 56, 57 and set output terminals MG1, MG2 to VDD, i.e., H level. Next, the step measurement signal transmitting circuit 91 outputs a control signal P1 via the braking control circuit 14 to turn off the first chopping transistor 56, and outputs a control signal P3 to turn on the transmitting transistor 93 for time T2, changing only the output terminal MG1 to VSS, i.e., the L level. As a result, a current flows from the power storage device 70 to the power generating coil 52 via the second power supply line 82, the transmitting transistor 93, the output terminal MG1, the power generating coil 52, the output terminal MG2, the chopping transistor 57, and the first power supply line 81, generating a magnetic field in the power generating coil 52 and transmitting a step measurement pulse with a pulse width T2.

[0030] After outputting the step measurement pulse, the step measurement signal transmitting circuit 91 outputs a control signal P3 to turn off the transmitting transistor 93, thereby turning off the transmitting transistor 93. As a result, the output terminal MG1 is not connected to either the first power supply line 81 or the second power supply line 82, and the voltage level becomes indefinite. Until time T3 has elapsed since the start of output of the step measurement pulse, the step measurement signal transmitting circuit 91 outputs a control signal P2 that turns on the chopping transistor 57 via the braking control circuit 14, and maintains the output terminal MG2 at VDD. After time T3 has elapsed, the control signal P2 that turns off the chopping transistor 57 is output. As a result, the output terminal MG2, like the output terminal MG1, is not connected to either the first power supply line 81 or the second power supply line 82, and the voltage level is therefore indefinite.

[0031] In this embodiment, the relationship between times T1, T2, and T3 is T1>T3>T2. For example, time T1 is 15.6 msec, time T2 is 1.96 msec, and time T3 is 7.8 msec. The output terminals MG1 and MG2 are set to VDD immediately before the output of the step measurement pulse, because, as will be described later, between the output of one step measurement pulse and the output of the next step measurement pulse, chopping transistors 56, 57 and transmitting transistor 93 are turned off by control signals P1, P2, and P3, making it unclear which of the output terminals MG1 and MG2 is at a higher potential; therefore, if the output terminals MG1 and MG2 are set to the same potential at VDD and then the output terminal MG1 is changed to VSS, a sudden change in current occurs, making it easier for an external device to detect the step measurement pulse output from the generating coil 52. Furthermore, by setting the output terminals MG1 and MG2 to VDD before outputting the walk measurement pulse, it is possible to prevent power generation in the power generating coil 52, and it is also possible to prevent the walk measurement device 100 from erroneously detecting the power generation waveform as a walk measurement pulse. Furthermore, since T3>T2, the second chopping transistor 57 can be turned off after the transmitting transistor 93 is turned off, and the pulse width T2 of the rate measuring pulse can be reliably secured.

[0032] [Walking speed measuring device] The walk measurement device 100 has a function of receiving walk measurement pulses transmitted from the watch 1, and a function of charging the watch 1. For this reason, as shown in Figure 5, the walk measurement device 100 comprises a transmitting / receiving coil 101 that is electromagnetically coupled with the power generation coil 52 of the watch 1, a transmitting unit 102 that transmits a charging signal to the watch 1 via the coil 101, a receiving unit 103 that receives walk measurement pulses from the watch 1 via the coil 101, a control unit 110, and a memory unit 120. The control unit 110 includes a power transmission control unit 111 and a walking speed measuring unit 115 .

[0033] The power transmission control section 111 controls power transmission by non-contact charging using electromagnetic induction between the coil 101 of the walk measurement device 100 and the power generation coil 52 of the timepiece 1. For this reason, the power transmission control section 111 controls the transmission section 102 to supply AC current to the coil 101 for a preset power transmission time. The frequency of the AC current supplied to the coil 101 can be set appropriately. For example, it may be set to the same frequency as that of the generator 50 of the timepiece 1 in the rate measurement mode, that is, in a free-running state without brake control. When the generator 50 is speed-regulated by brake control, the rotor 51 rotates at 8 Hz, so the frequency of the generated current of the generator 50 is also 8 Hz. In contrast, the frequency of the generator 50 in the free-running state is several times that of 8 Hz during regulation, for example, about 30 Hz. Therefore, the frequency of the AC current supplied to the coil 101 may be set to about 30 Hz. Furthermore, the power transmission control unit 111 may supply the coil 101 with an AC current of a higher frequency than that of the generator 50 in the free-running state.

[0034] The walk measuring unit 115 measures the reception interval, that is, the frequency, of walk measuring pulses received from the clock 1 . The storage section 120 mainly stores measurement data such as the frequency of the walk measurement pulses measured by the walk measurement section 115 . The above-described timepiece 1 and the walk measurement device 100 constitute a walk measurement system.

[0035] [Method of measuring rate] Next, a walk measurement method in a walk measurement system including the timepiece 1 and the walk measurement device 100 will be described with reference to the flow charts of FIGS. The watch rate measurement method is carried out on the watch 1 in the production process after the movement has been assembled into the exterior case 2 and the watch 1 has been put into a finished product state. As shown in Fig. 6, when the mainspring 40 is wound by an operator, the rotor 51 rotates via the wheel train 41 to generate electricity using the generator 50. This causes the voltage of the electricity storage device 70, which is made up of a capacitor, to rise, and the rotation control device 10, which is made up of an IC, starts up (step S1). Note that the mainspring 40 does not need to be fully wound, as it is sufficient to have the generator 50 generate electricity to start the rotation control device 10. Next, the watch 1, which has been put into the walk measurement mode by operating the crown 7, is placed in the thermostatic chamber (step S2). Note that the walk measurement device 100 is installed in the thermostatic chamber, and the watch 1 is placed in the thermostatic chamber at a distance that allows transmission and reception between the walk measurement device 100 and the watch 1. The watch 1 that has entered the walk measurement mode activates the walk measurement signal transmitting circuit 91 and executes the walk measurement pulse transmitting process (step S3). In the walk measurement pulse transmitting process of step S3, as described above, the walk measurement signal transmitting circuit 91 controls the chopping transistors 56, 57 and the transmitting transistor 93 by the control signals P1, P2, P3 during the period from the start of time T1 to the end of time T3, to execute the walk measurement pulse transmitting process.

[0036] On the other hand, as shown in FIG. 7, when the power is turned on by the operator (step S11), the step measurement device 100 activates the receiving unit 103 and starts a process of receiving the step measurement pulse transmitted from the watch 1 (step S12). When starting the receiving process of step S12, the walk measurement device 100 judges whether or not the receiving unit 103 has received a walk measurement pulse (step S13). If the result of the judgment in step S13 is NO, the walk measurement device 100 continues the receiving process of step S12. When the walk measurement device 100 receives the walk measurement pulse and judges YES in step S13, the power transmission control unit 111 transmits power (step S14). The power transmission control unit 111 passes a current through the coil 101 via the transmission unit 102 in response to a synchronization signal input by receiving the walk measurement pulse, and transmits power by non-contact charging using electromagnetic induction between the power generation coil 52 of the timepiece 1, that is, transmits power. That is, the power transmission control unit 111 starts transmitting power after a preset time has elapsed from the timing of receiving the walk measurement pulse, that is, from the timing of inputting the synchronization signal from the reception unit 103. The time from receiving this walk measurement pulse to starting power transmission is at least longer than time T3, as shown in FIG. 4, and is, for example, 0.2 to 0.3 seconds.

[0037] 6, when the timepiece 1 finishes transmitting the step measurement pulse in step S3, it turns off the chopping transistors 56, 57 and the transmitting transistor 93 using the control signals P1, P2, and P3 to enable the power generation coil 52 to receive power (step S4). To this end, the power transmission control unit 111 of the step measurement device 100 applies an AC voltage from the transmitting unit 102 to the coil 101, causing the coil 101 to generate a magnetic field. Note that the power reception in step S4 can be performed even if the rotor 51 of the generator 50 is rotating due to the spring 40, and can also be performed even if the spring 40 is unwound and the rotor 51 of the generator 50 is stopped, because the transistors 56, 57, and 93 are controlled to enable the power generation coil 52 to receive power.

[0038] An induced electromotive force is generated in the power generation coil 52 of the timepiece 1 by the magnetic field generated by the coil 101 of the step measurement device 100. At this time, since the rectifier circuit 60 is equipped with a boost capacitor 67, the boost capacitor 67 is charged with half a cycle of the AC power generated by the power generation coil 52, and in the remaining half cycle, the charge stored in the boost capacitor 67 is also used to charge the power storage device 70. When the rotor 51 is rotating due to the mainspring 40, an induced electromotive force is also generated in the power generating coil 52 due to the rotation of the rotor 51. However, because the wireless power supply by the step measurement device 100 is high frequency, the watch 1 can receive power without being affected by the power generation due to the rotation of the rotor 51.

[0039] As shown in Fig. 7, the power transmission control unit 111 of the walk measurement device 100 judges whether the power transmission period has ended (step S15). The power transmission period is set while the walk measurement pulse is being transmitted, and is therefore set to a time shorter than 1 second, which is the transmission interval of the walk measurement pulse, for example, 0.5 to 0.6 seconds. If the power transmission control unit 111 judges NO in step S15, it continues the power transmission process of step S14, and if the power transmission control unit 111 judges YES in step S15, that is, if the power transmission period has ended, it stops the power transmission process (step S16).

[0040] Meanwhile, the walk measurement signal transmitting circuit 91 of the timepiece 1 determines whether or not one second has passed since the walk measurement pulse transmitting process of step S3 (step S5), as shown in Fig. 6. Since the walk measurement pulse transmitting process of step S3 begins at the start of time T1 in Fig. 4, as described above, in step S5 it is determined whether or not one second has passed since the start of time T1. If the answer to step S5 is NO, the step measurement signal transmitting circuit 91 continues the power receiving process of step S4. Therefore, during the power transmitting process of step S14, the power generating coil 52 receives the power and stores it in the power storage device 70, and the rotation control device 10 is operated. If the answer to step S5 is YES, the walk measurement signal transmitting circuit 91 judges whether or not a predetermined period of time has elapsed since the start of walk measurement (step S6). In this embodiment, the timing of transition to the walk measurement mode in step S2 is regarded as the start of walk measurement, and the predetermined period is set to a time required to change the temperature of the thermostatic bath to three stages and perform walk measurement, for example, 18 hours. Therefore, if the time elapsed since transition to the walk measurement mode in step S2 is less than the predetermined time, that is, 18 hours, the answer to step S6 is NO, and the processes of steps S3 to S6 are repeated. At this time, the thermostatic bath is controlled so that the set temperature is automatically switched every six hours and walk measurement is performed at three stages of temperature.

[0041] Similarly, the walk measurement device 100 judges whether or not a predetermined period has elapsed since the start of walk measurement, as shown in Fig. 7 (step S17). In this embodiment, turning on the power in step S11 is regarded as the start of walk measurement, and the predetermined period is set to a time required to change the temperature of the thermostatic bath to three stages and perform walk measurement, for example, 18 hours. Therefore, if the time elapsed since turning on the power in step S11 is less than the predetermined time, that is, 18 hours, the result of step S17 is NO, and the processes of steps S12 to S17 are repeated. Note that the start of walk measurement may be the point in time when the walk measurement pulse is received for the first time in step S13 and the result of the judgment is YES, instead of the point in time when the power is turned on in step S11.

[0042] 6, if the answer is YES in step S6, the step measurement signal transmitting circuit 91 of the timepiece 1 ends the step measurement mode. When the step measurement mode ends, the timepiece 1 transitions to the normal hand movement mode, but if the mainspring 40 is unwound during the step measurement and power generation by the mainspring 40 is not being generated, the voltage of the power storage device 70 drops and the rotation control device 10 also stops. In this embodiment, the end of the walk measurement mode of the timepiece 1 is determined by the elapsed time from the start of walk measurement, i.e., by a timer, but the walk measurement mode may also be ended by an operation such as returning the crown 7 to the 0 position.

[0043] As shown in FIG. 7, when the answer is YES in step S17, the walk measurement device 100 turns off the power (step S18) and ends the walk measurement process. The walk information measured by the walk measurement unit 115 is stored in the storage unit 120. Therefore, the walk measurement device 100 outputs whether walk adjustment is necessary and the amount of walk correction, etc., based on the walk information at each of the three temperature stages. Therefore, the operator need only adjust the walk of the timepiece 1 determined to require walk adjustment. The walk adjustment method may be the same as the conventional adjustment method, such as the logical slow-and-fast method or a method of adjusting the load capacity of the oscillator circuit 11. This completes the step adjustment method in the step measurement system.

[0044] [Effects of the first embodiment] According to the timepiece 1 of this embodiment, while the power generating coil 52 of the generator 50 is used to transmit walk measurement pulses to the walk measurement device 100 at a constant cycle, the power transmitted from the walk measurement device 100 can be received via the power generating coil 52 and stored in the power storage device 70. As a result, during walk measurement, power can be supplied from the external walk measurement device 100 to the power storage device 70 of the timepiece 1, so that walk measurement can be carried out over a long period of time without the rotation control device 10 of the timepiece 1, i.e., the IC, stopping. Since the rate measurement can be performed even if the generator 50 stops, there is no need to fully wind the mainspring 40 before measuring the rate, the workload during rate measurement can be reduced, and the work efficiency of the rate measurement can be improved.

[0045] By providing a first chopping transistor 56 and a second chopping transistor 57 which are individually controlled by control signals P1, P2 output from the braking control circuit 14, and a transmitting transistor 93 which is controlled by a control signal P3 output from a step measurement signal transmitting circuit 91, the power generating coil 52 of the generator 50 can be used both for receiving power from the step measurement device 100 and for transmitting step measurement pulses, thereby reducing the circuitry and enabling the IC to be made smaller and at lower cost.

[0046] [Second embodiment] Next, a timepiece 1B and a walk measurement device 100B of a second embodiment will be described with reference to Figures 8 to 11. In the timepiece 1B and the walk measurement device 100B, the same components as those in the timepiece 1 and the walk measurement device 100 of the first embodiment are given the same reference numerals and will not be described. As shown in Fig. 8, the rotation control device 10B of the timepiece 1B is equipped with communication means 90B that also functions as transmission means. The communication means 90B differs from the transmission means 90 of the first embodiment in that it is equipped with a data detection circuit 92, but the rest of the configuration is the same as that of the timepiece 1 of the first embodiment. In other words, the communication means 90B serves both as transmission means for transmitting a walk measurement signal and as reception means for receiving a synchronization signal and commands from the walk measurement device 100B. The rotation control device 10B includes a communication means 90B, which includes a step measurement signal transmitting circuit 91, a data detecting circuit 92, and a transmitting transistor 93. The data detection circuit 92 includes a comparator connected to the output terminal MG1 of the power generation coil 52, and is configured to compare the detection voltage generated at the output terminal MG1 of the power generation coil 52 with a reference potential VREF, and detect data "0" or "1" based on the magnitude of the detection voltage. The data detection circuit 92 outputs the detected data to the walk rate measurement signal transmission circuit 91.

[0047] As shown in FIG. 9, the walk measurement device 100B differs from the walk measurement device 100 of the first embodiment in that a control unit 110B includes a command transmission control unit 112, but the other configurations are the same as those of the walk measurement device 100 of the first embodiment. Control unit 110B includes a power transmission control unit 111, an instruction transmission control unit 112, and a walk measurement unit 115. The instruction transmission control unit 112 is a control unit that transmits to the timepiece 1 an output instruction for a walk measurement pulse.

[0048] [Method of measuring rate] Next, a walk measurement method in a walk measurement system including the timepiece 1B and the walk measurement device 100B will be described with reference to the flowcharts of FIGS. As shown in FIG. 10, the operator places the watch 1B in the thermostatic oven with the crown 7 pulled out to a predetermined position that instructs the transition to reception mode, for example, to the second click (step S21). 11, the operator turns on the power supply of the walk measurement device 100B (step S41). Then, the walk measurement device 100B transmits power by the power transmission control unit 111 (step S42). The power transmission control unit 111 measures in advance the power transmission time required to increase the voltage of the power storage device 70 of the timepiece 1B to a voltage that can reliably start the rotation control device 10B, and transmits power for the preset power transmission time in step S42.

[0049] 10, the timepiece 1B receives power from the walk speed measurement device 100B and stores the power in the power storage device 70 (step S22). This starts up the rotation control device 10B, that is, the IC (step S23). When the rotation control device 10B detects that the position of the crown 7 is a predetermined position that indicates a transition to the reception mode, it transitions to a reception mode in which it can receive a signal transmitted from the walk measurement device 100B (step S24). At this time, the rotation control device 10B turns on the second chopping transistor 57 by the control signal P2, turns off the first chopping transistor 56 by the control signal P1, and turns off the transmitting transistor 93 by the control signal P3, thereby making the data detection circuit 92 ready to receive a signal.

[0050] As shown in FIG. 11, after the power transmission time for transmitting power in step S42 has elapsed and power transmission has been stopped, the walk measurement device 100B transmits a synchronization signal by the command transmission control unit 112 (step S43). 10, the clock 1B determines whether or not a synchronization signal has been received by the data detection circuit 92 (step S25). The clock 1B continues the determination process of step S25 until it receives a synchronization signal and determines YES in step S25.

[0051] As shown in FIG. 11, the command transmission control unit 112 of the walk measurement device 100B transmits a walk measurement pulse output command after a preset predetermined time has elapsed after transmitting the synchronization signal in step S43 (step S44). 10, after receiving the synchronization signal in step S25, clock 1B starts receiving command codes after a preset time has elapsed, and determines whether or not a walk measurement pulse output command has been received (step S26). Clock 1B continues the determination process of step S26 until it receives the walk measurement pulse output command and determines YES in step S26.

[0052] When watch 1B receives the walk measurement pulse output command, it transitions to a walk measurement mode (step S27). After transmitting the walk measurement pulse output command in step S44, walk measurement device 100B activates receiver 103 and starts a process of receiving walk measurement pulses transmitted from watch 1B (step S45). The processing of steps S28 to S32 after the transition to the walk measurement mode in watch 1B is the same as steps S3 to S7 in watch 1 of the first embodiment, and the processing of steps S45 to S51 from the start of the reception processing in walk measurement device 100B is the same as steps S12 to S18 in walk measurement device 100 of the first embodiment, so description thereof is omitted.

[0053] In the walk rate measurement device 100B as well, information on the walk rate measured by the walk rate measurement unit 115 is stored in the memory unit 120, and the walk rate measurement device 100B outputs whether walk rate adjustment is necessary and the amount of walk rate correction, etc., based on the walk rate information at each of the three temperature stages. Therefore, the operator need only adjust the walk rate of the watch 1B determined to require walk rate adjustment, as in the first embodiment.

[0054] [Effects of the second embodiment] In the second embodiment, the same effects as those in the first embodiment can be achieved by using the same configuration and method. In addition, in the second embodiment, power is first transmitted from the walk measurement device 100B and the rotation control device 10B of the timepiece 1B is started, so there is no need to wind up the mainspring 40 of the timepiece 1B and generate electricity with the generator 50 to charge the power storage device 70 before the walk measurement operation, reducing the workload. In other words, the walk measurement process can be performed with only the power supply from the walk measurement device 100B.

[0055] By pulling out the crown 7 of the watch 1B to a designated position, the watch will automatically switch to reception mode when the rotation control device 10B is started up, and when the watch receives a walk measurement pulse output command sent from the walk measurement device 100B in reception mode, it will automatically switch to walk measurement mode. Therefore, the operator only needs to pull out the crown 7 to a designated position before starting measurement and turn on the power of the walk measurement device 100B. After measurement has started, no further operation by the operator is required, which reduces the workload and makes walk measurement easy.

[0056] [Variations] It should be noted that the present disclosure is not limited to the above-described embodiments, and modifications, improvements, etc. within the scope that can achieve the object of the present disclosure are included in the present disclosure. The generator of the timepiece may be any generator equipped with a power-generating coil, for example, a generator equipped with a rotor rotated by an oscillating weight. The generator may also be a generator that generates power from the vibration of a balance in a mechanical timepiece in which the train of wheels that transmits mechanical energy from the mainspring is regulated using an escape wheel, an anchor, and a balance. For example, a rotor for the generator may be attached to the balance of the balance, and a power-generating coil that generates power from the rotation of this rotor may be used both for transmitting a rate-measuring pulse and for receiving power. A permanent magnet may also be provided on the balance, and a power-generating coil that generates power through the movement of this permanent magnet may be used both for transmitting a rate-measuring pulse and for receiving power.

[0057] In the above embodiment, the timepiece transmits a step measuring pulse at one second intervals, but it may transmit at a different cycle, such as at 0.5 second or 2 second intervals. The walk measurement devices 100 and 100B are not limited to those that transmit power every time a walk measurement pulse is received, but may transmit power every time a walk measurement pulse is received multiple times. For example, if the power storage device 70 can store enough power to transmit a walk measurement pulse three times from the watch by one power transmission, it is sufficient to transmit power every time a walk measurement pulse is received three times.

[0058] The timepiece may be provided with a temperature compensation function section that compensates for the temperature characteristics of the crystal unit 8 and the like to suppress fluctuations in the oscillation frequency. The temperature compensation function section includes a temperature sensor provided inside the timepiece, a temperature compensation table storage section in which compensation data for the rate relative to the measured temperature of an ideal crystal unit 8 and the like is set, an individual difference compensation data storage section that compensates for individual differences between timepieces, a logical speed-adjustment circuit that controls each division stage of the frequency divider circuit 12, and a frequency adjustment control circuit that adjusts the load capacity of the oscillation circuit 11, and adjusts the rate based on the temperature characteristics of the crystal unit 8 and the like. The walk measurement device creates individual difference compensation data for each of the timepieces 1, 1B based on the measurement data of the walk measurement signal, and stores the created individual difference compensation data in the timepieces 1, 1B. At this time, the timepiece 1B, which is provided with a data detection circuit 92, can receive the individual difference compensation data transmitted from the walk measurement device 100B by the power generation coil 52 and the data detection circuit 92 of the timepiece.

[0059] In the watch 1B, when the rotation control device 10B is started, the position of the crown 7 is detected and the watch 1B transitions to the receiving mode, and when a walk measurement pulse output command is received from the walk measurement device 100B, the watch 1B transitions to the walk measurement mode. However, when the rotation control device 10B is started, the position of the crown 7 is detected and the watch 1B transitions directly to the walk measurement mode and begins transmitting walk measurement pulses.

[0060] [summary] The timepiece disclosed herein comprises hands that display the time, a control means for controlling the operation of the hands, a generator equipped with a power-generating coil, a transmission means for transmitting a walk measurement signal at regular intervals via the power-generating coil to a walk measurement device provided outside the watch, and a power storage device for storing electrical energy generated by the power-generating coil and supplying the electrical energy to the control means and the transmitting means, and is characterized in that the power storage device receives power transmitted from the walk measurement device via the power-generating coil between the transmission of one walk measurement signal and the next walk measurement signal, and stores it in the power storage device. According to the timepiece of the present disclosure, a step measurement signal can be transmitted to a step measurement device using a power generating coil of a generator, and power transmitted from the step measurement device can be received via the power generating coil and stored in a power storage device during the period from when a step measurement signal is transmitted until the next step measurement signal is transmitted. Therefore, even if the generator stops during the step measurement period, the power storage device can continue to store power from the step measurement device outside the timepiece, and it is possible to prevent the control means from stopping due to a voltage drop in the power storage device, so that a step measurement can be performed over a long period of time. In addition, since the step measurement can be performed even if the generator stops, for example, in a timepiece that drives a generator with a mainspring, there is no need to fully wind the mainspring before the step measurement, which reduces the workload during the step measurement and improves the work efficiency of the step measurement.

[0061] In the timepiece of the present disclosure, the power storage device may store the power received from the walk measurement device via the power generating coil before transmitting the walk measurement signal, and the transmission means may begin transmitting the walk measurement signal using the power stored in the power storage device. According to the timepiece of the present disclosure, before transmitting a step measurement signal, power transmitted from the step measurement device is received via the power generating coil and stored in the power storage device, so that step measurement can be started even when the generator has stopped and the voltage of the power storage device has dropped. Therefore, in the case of a timepiece that drives a generator with a spring, there is no need to wind the spring before step measurement, which further reduces the workload of step measurement and improves the efficiency of the step measurement work.

[0062] In the timepiece disclosed herein, the timepiece may be equipped with a crown that is movable in the axial direction, and the control means may detect the position of the crown after startup, and start transmitting the step measurement signal when the detected position of the crown is a predetermined position. According to the timepiece disclosed herein, even if the control means of the timepiece has stopped due to a drop in the voltage of the power storage device, by pulling the crown out to a specified position in advance, the power storage device of the timepiece will store power through power supplied from an external walk measurement device, causing the voltage to rise and the control means to start up, and the timepiece can automatically switch to a walk measurement mode that transmits a walk measurement signal. Therefore, after the control means has started up through power supply from an external walk measurement device, there is no need to operate the crown to switch to the walk measurement mode, and the timepiece can easily switch to the walk measurement mode.

[0063] In the timepiece disclosed herein, it is preferable that the timepiece comprises a mainspring and a gear train that transmits the mechanical energy of the mainspring, the hands are driven by the gear train, the generator is capable of generating electricity by converting the mechanical energy of the mainspring into the electrical energy, and the process in which the power storage device stores the power transmitted from the step measuring device via the power generating coil can be performed when the mainspring is not wound. According to the timepiece disclosed herein, in an electronically controlled mechanical timepiece that generates electricity using a mainspring and uses the generated electricity to operate a control means to control the movement of the hands, even when the mainspring is not wound, electricity transmitted from an external step measurement device can be stored in the power storage device via the generator's power generating coil, making it possible to output a step measurement signal by transmitting electricity from the step measurement device and measure the step without having to wind the mainspring.

[0064] In the timepiece of the present disclosure, it is preferable that the transmitting means comprises a first transistor connected between a first power supply line connected to the power storage device and one terminal of the power generating coil, a second transistor connected between the first power supply line and the other terminal of the power generating coil, a transmitting transistor connected between a second power supply line connected to the power storage device and one terminal of the power generating coil, and a step measurement signal transmitting circuit that controls the first transistor, the second transistor, and the transmitting transistor. According to the timepiece of the present disclosure, the step measurement signal transmitting circuit controls the on / off of the first and second transistors and the transmitting transistor, thereby connecting or disconnecting each terminal of the power generating coil to the power supply line, thereby allowing current to flow through the power generating coil and transmitting the step measurement signal. This simplifies the configuration of the transmitting means and reduces costs.

[0065] In the timepiece of the present disclosure, it is preferable that the step measurement signal transmitting circuit controls the first transistor and the second transistor to the on state at regular intervals, connects each terminal of the power generating coil to the first power supply line to short it, and then, while maintaining the second transistor in the on state, controls the first transistor to the off state and the transmitting transistor to the on state to connect one terminal of the power generating coil to the second power supply line, and passes current from the storage device to the power generating coil to transmit the step measurement signal. According to the timepiece of the present disclosure, at regular intervals, each terminal of the power generating coil is short-circuited and made to have the same potential by connecting it to a first power supply line, and then one terminal of the power generating coil is switched to connection to a second power supply line, so that the current flowing through the power generating coil can be changed rapidly and the walk rate measurement signal output from the power generating coil can be easily detected by an external walk rate measurement device.

[0066] In the timepiece of the present disclosure, the fixed period is preferably one second. According to the timepiece of the present disclosure, the walk measurement signal is transmitted at one-second intervals, so that the process of receiving power from the walk measurement device by the generator's power generating coil and storing it in the power storage device between the transmission of one walk measurement signal and the transmission of the next walk measurement signal can continue for less than one second, for example, for about 0.5 to 0.7 seconds, thereby improving power storage efficiency.

[0067] The walk measurement device disclosed herein is a walk measurement device that measures the walk of a watch having a power generating coil, and is characterized in that it comprises a coil that is electromagnetically coupled to the power generating coil, a receiving unit that receives a walk measurement signal transmitted from the watch at a constant cycle via the coil, and a power transmission control unit that transmits power via the coil for a predetermined period of time that is shorter than the constant cycle after receiving the walk measurement signal until the next walk measurement signal is received. According to the walk measurement device of the present disclosure, a walk measurement signal transmitted from a watch can be received using a coil that is electromagnetically coupled to the power generation coil of the watch, and while the walk measurement signal is transmitted from the watch at a constant cycle, power can be transmitted via the coil for a time shorter than the constant cycle, and the power can be received by the power generation coil and stored in the power storage device. Therefore, even if the generator stops during the walk measurement period, the power storage device continues to store power using power from the walk measurement device, and it is possible to prevent the control means from stopping due to a drop in the voltage of the power storage device, making it possible to perform walk measurement over a long period of time.

[0068] The walk measurement system disclosed herein is a walk measurement system comprising a watch and a walk measurement device provided outside the watch and measuring the walk of the watch, wherein the watch comprises hands that display the time, a control means for controlling the operation of the hands, a generator having a power generating coil, a transmission means for transmitting walk measurement signals to the walk measurement device at regular intervals via the power generating coil, and a power storage device for storing electrical energy generated in the power generating coil and supplying the electrical energy to the control means and the transmission means, wherein the walk measurement device comprises a coil that is electromagnetically coupled to the power generating coil, a receiving unit that receives the walk measurement signals transmitted from the watch at regular intervals via the coil, and a power transmission control unit that transmits power via the coil for a predetermined time shorter than the regular interval after receiving the walk measurement signal until receiving the next walk measurement signal, and wherein the power storage device stores the power transmitted from the walk measurement device via the power generating coil. According to the walk measurement system of the present disclosure, since it is equipped with the watch and the walk measurement device, it is possible to carry out walk measurement over a long period of time, reduce the workload of walk measurement, and improve the work efficiency of walk measurement.

[0069] The walk measurement method disclosed herein is a walk measurement method for measuring the walk of a watch using a walk measurement device, and is characterized by comprising the steps of: placing the watch in a constant temperature bath and switching to a walk measurement mode; transmitting a walk measurement signal from the watch at a constant cycle using a power generating coil; the walk measurement device, upon receiving the walk measurement signal, transmitting power via the coil of the walk measurement device for a predetermined period shorter than the constant cycle; and storing the power transmitted from the walk measurement device via the power generating coil in a power storage device of the watch. According to the walk rate measurement method of the present disclosure, walk rate measurement can be performed over a long period of time, the workload of walk rate measurement can be reduced, and the work efficiency of walk rate measurement can be improved. [Explanation of symbols]

[0070] 1...clock, 1B...clock, 2...exterior case, 3...dial, 4A...hour hand, 4B...minute hand, 4C...second hand, 7...crown, 8...quartz crystal oscillator, 10...rotation control device, 10B...rotation control device, 40...spring, 41...wheel train, 42...display device, 50...generator, 51...rotor, 52...generator coil, 55...brake circuit, 56...first chopping transistor, 57...second chopping transistor, 60...rectifier circuit, 70...energy storage device, 81...first power supply line, 82...second power supply line, 90...transmitting means, 90B...communication means, 91...walking speed measurement signal transmitting circuit, 92...data detection circuit, 93...transmitting transistor, 100...walking speed measurement device, 100B...walking speed measurement device, 101...coil, 102...transmitting unit, 103...receiving unit, 110...control unit, 110B...control unit, 111...power transmission control unit, 112...command transmission control unit, 115...walking speed measurement unit, 120...memory unit.

Claims

1. A hand that displays the time, A control means for controlling the operation of the pointer; A generator including a power generating coil; a transmitting means for transmitting a step measuring signal at a constant cycle via the power generating coil to a step measuring device provided outside the timepiece; a power storage device that stores the electric energy generated by the power generating coil and supplies the electric energy to the control means and the transmission means, The power storage device receives the power transmitted from the walk measurement device via the power generation coil between the transmission of the walk measurement signal and the next transmission of the walk measurement signal, and stores the power in the power storage device. A watch characterized by

2. 2. The timepiece according to claim 1, the power storage device stores the power received from the walk measurement device via the power generation coil before transmitting the walk measurement signal; The transmitting means starts transmitting the step measuring signal using the power stored in the power storage device. A watch characterized by

3. 3. The timepiece according to claim 2, Equipped with an axially movable crown, The control means detects the position of the crown after startup, and starts transmitting the movement measuring signal when the detected position of the crown is a predetermined position. A watch characterized by

4. 2. The timepiece according to claim 1, A spring and a gear train that transmits mechanical energy of the spring, The hands are driven by the wheel train, the generator is capable of generating electricity by converting the mechanical energy of the spring into the electrical energy, The process of storing the power transmitted from the walking speed measuring device through the power generating coil in the power storage device can be performed in a state where the mainspring is not wound. A watch characterized by

5. 2. The timepiece according to claim 1, The transmitting means is a first transistor connected between a first power supply line connected to the power storage device and one terminal of the power generating coil; a second transistor connected between the first power supply line and the other terminal of the power generating coil; a transmitting transistor connected between a second power supply line connected to the power storage device and one terminal of the power generating coil; a step measurement signal transmitting circuit for controlling the first transistor, the second transistor, and the transmitting transistor. A watch characterized by

6. 6. The timepiece according to claim 5, The step measurement signal transmitting circuit The first transistor and the second transistor are controlled to be in an on state, and each terminal of the power generating coil is connected to the first power supply line to short-circuit the terminals, and then While maintaining the second transistor in an on state, the first transistor is controlled to be in an off state and the transmission transistor is controlled to be in an on state, one terminal of the power generating coil is connected to the second power supply line, and a current is caused to flow from the power storage device to the power generating coil, thereby transmitting the step measurement signal. A watch characterized by

7. 2. The timepiece according to claim 1, The fixed period is 1 second. A watch characterized by

8. A timepiece movement measuring device for measuring the time of a timepiece having a power generating coil, comprising: a coil that is electromagnetically coupled to the power generating coil; a receiver for receiving a time measurement signal transmitted at a constant interval from the timepiece via the coil; a power transmission control unit that transmits power through the coil for a predetermined time period that is shorter than the constant period from when the step measuring signal is received until when the next step measuring signal is received; A walking speed measuring device comprising:

9. A step measurement system including a timepiece and a step measurement device provided outside the timepiece for measuring the step of the timepiece, The clock comprises: A hand that displays the time, A control means for controlling the operation of the pointer; A generator including a power generating coil; a transmitting means for transmitting a walking speed measuring signal at a constant cycle to the walking speed measuring device via the power generating coil; a power storage device that stores the electric energy generated by the power generating coil and supplies the electric energy to the control means and the transmission means, The walking speed measuring device comprises: a coil that is electromagnetically coupled to the power generating coil; a receiver for receiving the step measurement signal transmitted at a constant interval from the timepiece via the coil; a power transmission control unit that transmits power through the coil for a predetermined time period that is shorter than the constant period from when the step measurement signal is received until when the next step measurement signal is received, The power storage device stores the power transmitted from the walking speed measurement device via the power generation coil. A walking speed measurement system.

10. A method for measuring the rate of a timepiece using a rate measuring device, comprising the steps of: placing the timepiece in a thermostatic chamber and transitioning to a rate measurement mode; a step of transmitting a time measurement signal from the timepiece at a constant interval using a power generating coil; a step of transmitting power through a coil of the step measurement device for a predetermined time period shorter than the constant period, the step measurement device receiving the step measurement signal; a step of storing the power transmitted from the step measuring device via the power generating coil in a power storage device of the timepiece; A walking speed measuring method comprising:

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