JP2005249522A - Non-contact electromagnetic writing device, transmission method for write information using the same, electronic apparatus with write information transmitted by the same mathod being written therein - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a non-contact electromagnetic writing device for modulating write pulses into an arbitrary analog waveform suitable for information transmission, etc. <P>SOLUTION: In this electromagnetic writing device 10, a waveform setting means 51 is provided for arbitrarily setting an analog waveform equivalent to one bit of write pulses by digital control, and write pulses are modulated at a signal modulation part 21 based on set data used when the setting is performed. By using the setting means 51 like this, the analog waveform is set so as to increase the amount of change per unit of time in magnetic flux generated in a coil 12 within one bit width. When modulating write pulses correspondingly to the set data, a magnetic field with a high rate of change in magnetic flux is generated in the coil 12 and can be impressed on a drive coil 101 (unillustrated) for a motor to increase induced electromotive force at the drive coil 101, and therefore information can be surely transmitted to the timepiece 100 side. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a non-contact type electromagnetic writing device, a writing information transmission method using the same, and an electronic apparatus in which writing information transmitted by the transmission method is written.

  Conventionally, for example, some analog electronic timepieces perform yearly writing correction in consideration of the frequency and temperature characteristics unique to a crystal unit. Such correction is performed especially with an electronic timepiece called a yearly clock with high accuracy (± 10 seconds / year), and is provided in a non-contact type electromagnetic writing device after the electronic timepiece is assembled. Information is transmitted from a coil, information is received using electromagnetic induction of a motor driving coil in an electronic timepiece, and this information is stored in an IC memory provided in the timepiece. For example, Patent Document 1 discloses such an electromagnetic writing device.

On the other hand, a yearly timepiece generally has a JIS 1 type or JIS 2 type magnetic resistance. This magnetic resistance performance is a level that can withstand a DC magnetic field of 16,000 A / m (200 G) in JIS class 2. According to this yearly timepiece, in order to ensure the magnetic resistance, a structure is adopted in which the motor drive coil and the stator, which are easily affected by a DC magnetic field, are sandwiched by a pair of magnetic plates from above and below.
Furthermore, in recent years, it has been desired to secure a superior magnetic resistance performance, for example, a level of DC magnetic field of 40,000 A / m or more. It is generally known that the above-described structure cannot sufficiently cope with such a demand, and therefore the entire movement of the timepiece is covered with upper and lower magnetic-resistant plates and magnetic-resistant frames.

JP-A-11-84028

  However, according to the conventional electromagnetic writing device, it is difficult to transmit and receive information in a finished product state in which the timepiece is assembled in an annual clock having better magnetic resistance because the level of magnetic resistance is high. Therefore, there arises a problem that yearly writing correction cannot be performed. That is, a magnetic field having a sufficient magnetic flux density cannot be applied to the watch-side coil, and the induced electromotive force in the coil becomes small, so that writing cannot be performed reliably.

As a solution to such a problem, it is conceivable to increase the amplitude of the voltage waveform supplied to the coil of the electromagnetic writing device and supply a larger voltage to generate a strong magnetic field.
However, in such a case, the watch-side motor stator is rotated by a strong magnetic field, so that reception sensitivity is lowered and a sufficient voltage cannot be generated in the motor drive coil. Does not send well. The same applies to the case where the number of turns and the cross-sectional area of the coil of the electromagnetic writing device are increased to generate a strong magnetic field.

An object of the present invention is to provide a non-contact type electromagnetic writing apparatus capable of modulating a writing pulse into an arbitrary analog waveform suitable for information transmission or the like.
Another object of the present invention is to provide a writing information transmission method using a non-contact type electromagnetic writing device capable of reliably transmitting information to a device having excellent magnetic resistance. .
Furthermore, another object of the present invention is to provide an electronic device in which writing information transmitted by such a transmission method is written.

The non-contact type electromagnetic writing device of the present invention is a non-contact type electromagnetic writing device having at least a coil for transmitting information, a waveform setting means capable of setting an arbitrary analog waveform, and the waveform setting And a signal modulation unit for modulating a write pulse for write information based on setting data of the means.
According to the present invention as described above, for example, an analog waveform corresponding to 1 bit of the write pulse is arbitrarily set by the waveform setting means, and the write pulse is set in the signal modulation unit based on the setting data at this time. Will be modulated. For this reason, if an analog waveform is set so that the amount of change per unit time of the magnetic flux density generated in the coil of the electromagnetic writing device is increased within 1 bit width, and the write pulse is modulated according to this setting data A magnetic field with a large change rate of the magnetic flux density is generated in the coil, and this magnetic field is applied to, for example, the motor driving coil on the clock side. Therefore, the induced electromotive force in the motor driving coil increases, and the magnetic force itself is reduced. Even if it is not increased, information transmission can be performed reliably.

On the other hand, a writing information transmission method using the non-contact type electromagnetic writing device of the present invention is a writing information transmission method performed using an electromagnetic writing device having at least a coil for information transmission. A sine wave having a write pulse width of 1 bit for write information as one cycle is modulated into a waveform in which the amount of change in magnetic flux density per unit time is increased, and the modulated waveform is supplied to the coil. It is characterized by.
According to the present invention, since the amount of change in the magnetic flux density per unit time in the coil increases, as described above, the induced electromotive force in the receiving coil increases and information transmission can be performed reliably. It becomes like this.

The write information transmitting method of the present invention includes a sine wave having an electromagnetic induction time that is approximately one half of the electromagnetic induction time when the sine wave is used, and the sine wave (write pulse 1). It is desirable to modulate the write pulse so as to have the same period as a sine wave having a bit width of one period.
In the present invention, the induced electromotive force is surely increased and the waveform can be detected well, which is more effective.

  On the other hand, the electronic apparatus of the present invention is characterized in that the writing information transmitted by the above transmission method is written.

According to the non-contact type electromagnetic writing device of the present invention, there is an effect that the writing pulse can be modulated into an arbitrary analog waveform suitable for information transmission or the like.
Further, according to the write information transmission method of the present invention, there is an effect that information transmission by a magnetic field can be reliably performed even for a device having excellent magnetic resistance.

Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
FIG. 1 shows how information is transmitted to and received from a timepiece (electronic device) 100 using the electromagnetic writing device 10 according to the present embodiment.
In FIG. 1, the electromagnetic writing device 10 includes a coil 12 wound around a ferrite core 11, and transmits necessary writing information to the timepiece 100 through the coil 12 in a non-contact state. Specifically, a voltage waveform corresponding to the writing information is supplied to the coil 12, and the writing information is transmitted to the motor driving coil 101 on the timepiece 100 side by a magnetic field generated at this time. On the watch 100 side, electromagnetic induction is generated by the magnetic field received by the motor drive coil 101, and the write information is recognized and received based on the current waveform of the induced electromotive force. The received write information is written into an IC or the like provided in the timepiece 100. By the reverse operation, information from the motor driving coil 101 of the timepiece 100 can be received by the coil 12 and read by the electromagnetic writing device 10 side.

  In the present embodiment, such an electromagnetic writing device 10 is used in a timepiece 100 having high antimagnetic performance. That is, in the watch 100 as the transmission destination of the write information, the upper side of the movement 102 is covered with a magnetic-resistant plate 103 made of an iron-based material (for example, SUS404), and a part of the periphery and the lower side are also made of the same material. It is covered with 104 and has a structure that ensures a level of DC magnetic field of 40,000 A / m or more. The timepiece 100 is accommodated in a case 200 made of a non-conductive material (for example, made of synthetic resin or ceramic) for movement between production processes and storage during the process, and the state accommodated in the case 200 Thus, the electromagnetic writing device 10 is set. The case 200 is provided with a plurality of (for example, ten) timepieces 100 by using a partition 201 made of a non-conductive material (for example, urethane). A plurality of coils 12 corresponding to each timepiece 100 are provided. Therefore, information can be written to a plurality of timepieces 100 at a time. Although not shown, in the electromagnetic writing device 10 according to the present embodiment, a plurality of cases 200 can be set, so that information can be efficiently written in each stage. Yes. Here, the information content written in the timepiece 100 includes, for example, time accuracy correction information, timepiece operation specification program, motor energy-saving drive control program, driving pulse, timepiece manufacturing history, customer information, user operation There is history.

FIG. 2 is a block diagram showing a schematic configuration of the entire electromagnetic writing device 10.
In FIG. 2, the electromagnetic writing device 10 is provided with a relay 13 that switches transmission / reception of information using a coil 12. The state of FIG. 2 is a case where information from the watch 100 is received. In this case, an induced electromotive force is generated in the coil 12 by the magnetic field from the timepiece 100 side. The current waveform at this time is amplified by the waveform shaping unit 14 and converted into a voltage waveform. Thereafter, the input gain adjustment unit 15 adjusts the strength of the signal composed of the voltage waveform by digital control. This degree of adjustment is arbitrarily set on a personal computer (hereinafter referred to as a personal computer) 50 and is changed by a command from the CPU 20.

The voltage waveform with the gain adjusted is converted from an analog signal to a digital signal by the A / D converter 16 and input to the CPU 20, while being compared with a comparison reference voltage by the voltage comparator 17. That is, when it is lower than the comparison reference voltage, it is amplified according to the degree. Here, the comparison reference voltage is output from the CPU 20, adjusted by the comparison reference signal adjustment unit 18, and then input to the voltage comparison unit 17. Then, in the voltage comparison unit 17, the noise is cut from the signal amplified to a predetermined magnitude based on the threshold value. The threshold value at this time is also arbitrarily set on the personal computer 50 and can be changed by a command from the CPU 20. Thereafter, the signal from which the noise has been cut is counted by a counter 19 for period measurement.
For this reason, by treating such a signal as the rate information of the timepiece 100 that is stepped, it is possible to measure the rate by counting the signal. FIG. 3 shows a circuit diagram of the input gain adjustment unit 15 and the voltage comparison unit 17 for reference.

The configuration of the electromagnetic writing device 10 has been described along the information receiving side. The following description will be given along the writing information output side.
In FIG. 2, a write pulse as write information output from the CPU 20 is converted into an analog signal by the signal modulator 21 and modulated by digital control. For example, FIG. 5A shows a case where one bit of a write pulse is converted into a sine wave of one cycle and modulated. The sine wave in this case represents “1” as a signal. That is, if the detection timing P is “negative”, “1” is indicated. Therefore, the sine wave corresponding to “0” is “positive” at the detection timing P, and is an inversion of the sine wave shown in the figure. In addition to the sine wave, the write pulse may be a triangular wave, a trapezoidal rectangular wave, or the like.

A personal computer 50 is used for such modulation. In the main body of the personal computer 50, waveform setting means 51 made of software is provided, and arbitrary modulation can be performed by calling up and starting up the waveform setting means 51.
Specifically, first, as shown in FIG. 5A, a tha coordinate system with a 1-bit signal width as one cycle is displayed on the display of the personal computer 50, and each time (t0 to t16 in this figure). Is determined (h0 to h16 in this figure), and a desired arbitrary waveform is set. Of course, since it is troublesome to manually input all the values of h0 to h16, a desired waveform is displayed by inputting the minimum necessary parameters in a preset arithmetic expression, and h0 to h16 are automatically set. Let me decide. Note that the zero point in the hh coordinate system is the intersection of each axis. Further, the number of t and h serving as setting data is not limited to 0 to 16, and a more detailed data group such as 0 to 32 may be constructed.

  In this embodiment, a voltage waveform as shown in FIG. 5B is actually set for the timepiece 100 having high magnetic resistance. The waveform of (B) is set so that the amount of change in magnetic flux density per unit time (rate of change of magnetic flux density) is larger than when the sine wave of (A) is supplied to the coil 12. Yes. In other words, the rising (falling) slope of the waveform is steeper. Further, among the waveforms satisfying such conditions, the waveform of (B) is a sine wave (approximately 2 minutes) in which the electromagnetic induction time is approximately half that of the waveform of (A). 1 bit width). However, the period of the entire waveform after modulation and the detection timing P do not change.

The set data t0 to t16 and h0 to h16 of the waveform (B) set in this way are stored in a storage means (not shown) in the personal computer 50 body and passed to the signal modulator 21 via the CPU 20. Thereby, the signal modulation unit 21 actually modulates the write pulse output from the CPU 20 as shown in the waveform (B) based on the setting data.
The waveform setting means 51 and the signal modulation unit 21 described above are one of the most characteristic configurations in the present embodiment.

Thereafter, the modulated waveform (write information) is inverted by the waveform shaping unit 22 as necessary, and the signal strength is adjusted by the output gain adjustment unit 23 by digital control. This degree of adjustment is also arbitrarily set on the personal computer 50 and is changed by a command from the CPU 20. The gain-adjusted waveform is amplified to a magnitude sufficient to be applied to the coil 12 by the voltage amplification amplifier 24, and is applied to the coil 12 when the relay 13 is switched.
As a result, a magnetic field having a large change rate of the magnetic flux density is generated in the coil 12, and this magnetic field acts on the motor driving coil 101 of the timepiece 100, so that an induced electromotive force is generated and writing information is transmitted. Yearly writing correction is performed. FIG. 4 shows a circuit diagram of the output gain adjusting unit 23 as a reference.

According to the present embodiment as described above, the following effects are obtained.
(1) That is, since the electromagnetic writing device 10 is provided with the waveform setting means 51 for arbitrarily setting an analog waveform corresponding to one bit of the writing pulse by digital control, it is based on the setting data at the time of setting. The write pulse can be easily modulated by the signal modulator 21.

(2) By using such a waveform setting means 51, an analog waveform is set so that the amount of change per unit time of the magnetic flux density generated in the coil 12 is increased within one bit width. If the write pulse is modulated, a magnetic field having a large change rate of the magnetic flux density can be generated in the coil 12 and applied to the motor drive coil 101, and the induced electromotive force in the motor drive coil 101 can be increased. For this reason, even if the magnetic force itself in the coil 12 is not increased, information transmission to the timepiece 100 side can be ensured, and operation compensation of the timepiece 100 can be ensured.

(3) The waveform obtained by converting the write pulse into analog is usually a sine wave with one pulse width as one cycle (FIG. 5A), and the time of one cycle is equal to the electromagnetic induction time. In contrast, in the present embodiment, the write pulse is width-modulated so as to include a sine wave having an electromagnetic induction time that is approximately one half of the electromagnetic induction time when such a sine wave is used (FIG. 5). (B)) As a result, the rate of change of the magnetic flux density is increased, so that the induced electromotive force can be reliably increased and the waveform can be detected well.

(4) Further, since the amount of energy consumption can be reduced by the amount that the electromagnetic induction time is approximately halved, power consumption can be saved, which is economical.

(5) Since the magnetic field itself generated by the coil 12 is not increased, the motor rotor of the timepiece 100 can be prevented from malfunctioning due to the magnetic field, and the reception sensitivity on the timepiece 100 side can be maintained well. In addition, seizure on the coil 12 side can be well prevented.

(6) Further, the waveform of FIG. 5 (A) has an advantage that it can be detected more reliably at the detection timing P, and is not used for the watch 100 having high magnetic resistance because the induced electromotive force is small. For watches that do not require high magnetic resistance, it can be used sufficiently. Therefore, by properly using the waveforms (A) and (B) according to the required anti-magnetic performance, reliable information transmission can be realized for a piece or a high anti-magnetic performance watch. For a watch that is not required, there is an effect that the detection capability on the watch side can be improved.

It should be noted that the present invention is not limited to the above-described embodiments, and modifications, improvements, and the like within the scope that can achieve the object of the present invention are included in the present invention.
For example, in the embodiment, the waveform shown in FIG. 5B is set as the waveform for increasing the change rate of the magnetic flux density. However, the waveform shown in FIGS. 6A and 6B is not limited to this. It may be. The waveform shown in FIG. 6 (A) is set to a period three times that in FIG. 5 (A). The waveform in FIG. 6B is a modified sine wave, and is set so that the rate of change is large when switching from positive to negative. In addition to these, any waveform that can increase the rate of change of magnetic flux density can be applied.

  The waveform in FIG. 6C is set to use only the half wave in FIG. This waveform does not contribute in terms of increasing the rate of change in magnetic flux density, but such a waveform can also be set if necessary for some reason. That is, the electromagnetic writing device of the present invention only needs to have a function capable of arbitrarily modulating the writing pulse, and it does not matter whether or not it contributes to increasing the change rate of the magnetic flux density.

  In the embodiment, the transmission destination of the writing information is the clock 100, but the electronic device of the transmission destination is not limited to such a clock, but a mobile phone, a PDA, a medical device, other portable electronic devices, etc. It may be.

  The control program for controlling the electromagnetic writing device 10 of the above embodiment is normally stored in advance in a storage means such as a ROM and has been described on the assumption that it is a storage medium such as various magnetic disks, optical disks, and memory cards. It is also possible to store the control program in advance, read from these storage media via the communication unit, and install them. Furthermore, it is also possible to connect the write information to a network such as the Internet or LAN, download the control program via the network, install it, and execute it. By configuring in this way, there is an effect that high-functional processing control can be realized.

In addition, the best configuration, method and the like for carrying out the present invention have been disclosed in the above description, but the present invention is not limited to this. That is, the invention has been illustrated and described primarily with respect to particular embodiments, but may be configured for the above-described embodiments without departing from the scope and spirit of the invention. Various modifications can be made by those skilled in the art in terms of materials, quantity, and other detailed configurations.
Therefore, the description limiting the shape, material, etc. disclosed above is an example for easy understanding of the present invention, and does not limit the present invention. The description by the name of the member which remove | excluded the limitation of one part or all of such restrictions is included in this invention.

Sectional drawing which shows the mode of transmission / reception of the information in the electromagnetic writing apparatus concerning one embodiment of this invention. The block diagram which shows schematic structure of the said whole electromagnetic writing apparatus. The circuit diagram which shows the principal part of the said electromagnetic writing apparatus. The circuit diagram which shows the other principal part of the said electromagnetic writing apparatus. The figure which shows the waveform (B) for making the change rate of magnetic flux density larger than the sine wave (A) which makes a write pulse 1 bit width 1 period, and the said sine wave. The figure which shows the waveforms (A) to (C) which concern on the modification of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 ... Electromagnetic writing device, 12 ... Coil, 21 ... Signal modulation part, 51 ... Waveform setting means, 1001 ... Clock (electronic device), 101 ... Clock side coil, t0-t16, h0-h16 ... Setting data.

Claims (4)

  A non-contact type electromagnetic writing device having at least a coil for transmitting information, a waveform setting means capable of setting an arbitrary analog waveform, and a writing information writing based on setting data of the waveform setting means A non-contact type electromagnetic writing device comprising: a signal modulation unit that modulates the embedded pulse.   A method of transmitting write information using an electromagnetic writing device having at least a coil for transmitting information, wherein a sine wave having a write pulse width of 1 bit for one cycle is written per unit time A method of transmitting write information using an electromagnetic writing device, characterized in that the magnetic flux density is modulated into a waveform in which the amount of change in magnetic flux increases, and the modulated waveform is supplied to the coil.   A writing information transmission method using the electromagnetic writing device according to claim 2, including a sine wave having an electromagnetic induction time that is approximately one half of an electromagnetic induction time when the sine wave is used, and A writing information transmitting method using an electromagnetic writing device, wherein the writing pulse is modulated so as to have the same period as the sine wave. An electronic apparatus in which the write information transmitted by the transmission method according to claim 2 or 3 is written.

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