JP2017201314A - Ultraviolet amount measurement device and ultraviolet amount measurement system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an ultraviolet amount measurement device and an ultraviolet amount measurement system which easily measure the amount of ultraviolet with an extremely simple and inexpensive configuration of a circuit.SOLUTION: An ultraviolet amount measurement device includes: a first photodetection part whose photosensitive portion is covered by a photochromatic plate on which a photochromic dye is applied, and which converts the intensity of visible light into an analog voltage signal; a second photodetection part whose photosensitive portion is not covered by a cover for blocking light; and an ultraviolet amount calculation part for calculating the amount of ultraviolet on the basis of data of the first photodetection part and the second photodetection part.SELECTED DRAWING: Figure 1

Description

  The present invention relates to an ultraviolet ray amount measuring apparatus and an ultraviolet ray amount measuring system.

In recent years, electronic devices have been improved in performance and price. For example, an LED light-emitting device having a flashing function rich in variations, which was unthinkable in the past, can be obtained at a low price of around 100 yen.
However, in order to perform data communication, an accessory device other than the LED issuing instrument is required, and thus it is difficult to realize it with a low-cost electronic circuit as described above.

Japanese Patent No. 3057438

The inventor has developed an apparatus for measuring the amount of ultraviolet rays as an accessory applied to a smartphone (portable wireless terminal) that has become widespread in recent years. Since various communication means are built in the portable wireless terminal, at first glance, it seems easy to transmit the measured amount of ultraviolet ray data to the portable wireless terminal. However, when data communication is performed using the communication function provided in the portable wireless terminal, the following problems occur.
First, wireless LAN and BlueTooth (registered trademark) devices are expensive and consume large power. In addition, prior to communication, various settings are required in advance, which is inconvenient.
IrDA (Infrared Data Association) using infrared rays is not equipped in some terminals, and the light emitting element on the transmission side and the light receiving element on the reception side must be firmly opposed to each other without a shield.
As described above, when data communication is performed using the communication function provided in the portable wireless terminal, inconveniences such as an expensive circuit and poor usability occur.
The cheapest communication means is a wired USB cable, but it is complicated because it is wired, and is not easy to use. There is also a possibility of cable disconnection.

  The present invention has been made in view of such a situation, and an object of the present invention is to provide an ultraviolet ray amount measuring apparatus and an ultraviolet ray amount measuring system that easily realize data communication with a very simple and inexpensive circuit configuration.

In order to solve the above-described problems, the ultraviolet light amount measuring apparatus according to the present invention includes a first light detection method for converting the intensity of visible light into an analog voltage signal in which a photosensitive part is shielded by a photosensitive color changing plate coated with a photochromic dye. And a second photodetecting unit having substantially the same electrical characteristics as the first photodetecting unit, the photosensitive part not being shielded by a shielding object that shields light, and the first photodetecting unit and the second photodetecting unit An A / D converter that converts the output signal of the unit into digital data, and an ultraviolet ray amount calculation unit that calculates the ultraviolet ray amount based on the digital data of the first light detection unit and the second light detection unit.
Furthermore, an encoder that converts the amount of UV data into a rectangular wave signal, and a vibration that has a peak at a single natural vibration frequency that receives the rectangular wave signal and produces sound at the edge of the rectangular wave signal. And a sounding body that emits sound.

In order to solve the above problems, the ultraviolet ray amount measuring system of the present invention is an ultraviolet ray amount measuring system including an ultraviolet ray amount measuring device and a data receiving device.
The ultraviolet light amount measuring device is substantially the same as the first light detection unit and the first light detection unit that converts the intensity of visible light into an analog voltage signal, in which the photosensitive part is shielded by a photosensitive color change plate coated with a photochromic dye. A second photodetection unit that has the electrical characteristics of the above and whose photosensitive part is not shielded by a shield that shields light, and A that converts output signals of the first photodetection unit and the second photodetection unit into digital data / D converter, and the ultraviolet-ray amount calculation part which calculates an ultraviolet-ray amount based on the digital data of a 1st light detection part and a 2nd light detection part. Furthermore, an encoder that converts the amount of UV data into a rectangular wave signal, and a vibration that has a peak at a single natural vibration frequency that receives the rectangular wave signal and produces sound at the edge of the rectangular wave signal. And a sounding body that emits.
A data receiving device includes a microphone, an A / D converter that converts a sound signal output from the microphone into digital sound data, and a waveform of a sounding body that has a peak at a single natural vibration frequency and emits a damping vibration A waveform correlation processing unit that calculates the correlation between the data and audio data, and a decoder that outputs data based on the correlation data output by the waveform correlation processing unit.

According to the present invention, it is possible to provide an ultraviolet ray amount measuring apparatus and an ultraviolet ray amount measuring system that can easily realize data communication with an extremely simple and inexpensive circuit configuration.
Problems, configurations, and effects other than those described above will be clarified by the following description of embodiments.

It is the schematic which shows the use condition of the ultraviolet-ray amount measuring apparatus based on embodiment of this invention, and the schematic which shows an external appearance and an internal structure. It is a block diagram which shows the hardware constitutions of an ultraviolet-ray amount measuring apparatus, and a block diagram which shows a software function. Graph showing frequency characteristics of piezoelectric speaker, rectangular wave signal applied to piezoelectric speaker, waveform of sound generated from piezoelectric speaker, signal waveform converted to pulse based on sound generated from piezoelectric speaker, and monostable pulse signal It is a waveform schematic diagram which shows the signal waveform passed through the multivibrator (mono multi). It is the signal waveform figure which measured the sound emitted from the piezoelectric speaker of the ultraviolet light amount measuring apparatus 102 of this embodiment with the oscilloscope, and the signal waveform partially enlarged view. FIG. 2 is a block diagram showing a hardware configuration of a data receiving apparatus and a block diagram showing software functions. It is the schematic explaining the operation | movement principle of a waveform correlation process part, and the functional block diagram of a waveform correlation process part. It is a functional block diagram of a data transmitter.

[Outline of ultraviolet ray measuring device and portable wireless terminal]
FIG. 1A is a schematic diagram illustrating a usage state of an ultraviolet ray amount measuring apparatus according to an embodiment of the present invention.
FIG. 1B is a schematic diagram showing an external appearance and an internal structure of the ultraviolet ray amount measuring apparatus according to the embodiment of the present invention.
The ultraviolet ray amount measuring device 102 used as an accessory of the portable wireless terminal 101 is a stuffed animal 104 connected to a strap cord 103 having a length of about 3 to 5 cm. That is, the stuffed animal 104 becomes a housing of the ultraviolet ray amount measuring device 102. A first photodiode 106 shielded by the photosensitive color changing plate 105, a second photodiode 107 without a shield, and a circuit board 108 are embedded in the stuffed toy 104. The light receiving surfaces of the first photodiode 106 and the second photodiode 107 are exposed from the stuffed animal 104. In FIG. 1B, the first photodiode 106 and the second photodiode 107 are exposed at the head of the bear stuffed animal 104.

  The photosensitive color changing plate 105 is an acrylic plate coated with a photochromic dye. The photochromic dye used in photochromic glass such as sunglasses has a reversible color change property that changes to gray or black when absorbing ultraviolet rays and returns to discoloration when no ultraviolet rays are irradiated. The stronger the ultraviolet rays, the darker the photochromic dye. The first photodiode 106 and the second photodiode 107 are visible light sensors, and the output current of the first photodiode 106 shielded by the photosensitive color changing plate 105 and the output current of the second photodiode 107 having no shield are obtained. By comparing, the intensity of ultraviolet rays can be calculated. As is well known, a sensor for visible light is less expensive than an ultraviolet sensor that directly detects ultraviolet light. According to the ultraviolet ray amount measuring apparatus 102 using this method, it is possible to detect the intensity of ultraviolet rays at a lower price compared to existing ultraviolet sensors.

The circuit board 108 includes a well-known one-chip microcomputer (not shown), a push button switch 109, a piezoelectric speaker 207 (not shown) (see FIG. 2), and a button battery socket (not shown).
For example, a one-chip microcomputer that operates on a button battery such as CR 2032 receives the output currents of the first photodiode 106 and the second photodiode 107, calculates the amount of ultraviolet rays, and stores it in a RAM 203 (not shown) (see FIG. 2). . When the push button switch 109 is pressed by the user, the piezoelectric speaker 207 is driven to convert the ultraviolet ray amount data in the RAM 203 into an audio signal. That is, the ultraviolet ray amount measuring apparatus 102 of the present embodiment is also a data transmitting apparatus in which sound becomes a data carrier wave.
The portable wireless terminal 101 has an application program for receiving voice data, picks up sound emitted from the piezoelectric speaker 207 of the ultraviolet ray amount measuring apparatus 102 from the microphone, decodes it through noise removal processing, and obtains ultraviolet ray amount data. Get.

[Hardware configuration and software function of ultraviolet ray measuring device 102]
FIG. 2A is a block diagram illustrating a hardware configuration of the ultraviolet ray amount measuring apparatus 102.
The ultraviolet ray amount measuring device 102 is a device including a well-known microcomputer to which a well-known CPU 201, ROM 202, RAM 203, and push button switch 109 are connected to a bus 204. Further, a first photodiode 106 and a second photodiode 107 are connected to the bus 204 through an A / D converter 205 (abbreviated as “A / D” in FIG. 2), and a serial interface 206 (“serial” in FIG. 2). The piezoelectric speaker 207 is connected through an abbreviation “I / F”.
What should be noted here is that the piezoelectric speaker 207 is not connected to the D / A converter and is directly driven by a rectangular wave voltage signal output from the bus 204. The details of driving the piezoelectric speaker 207 will be described later with reference to FIG.

FIG. 2B is a block diagram illustrating software functions of the ultraviolet ray amount measuring apparatus 102.
Output signals from the first photodiode 106 and the second photodiode 107 are converted into digital data by the A / D converter 205. The ultraviolet ray amount calculation unit 208 calculates the ultraviolet ray amount based on the data of the first photodiode 106 and the second photodiode 107. Then, under the control of the input / output control unit 209, the ultraviolet ray amount data is recorded in the log memory 211 together with the relative time information output from the timer 210. The log memory 211 is a non-volatile storage such as a battery-backed RAM 203 or a flash memory ROM 202.
When the input / output control unit 209 receives the operation information of the push button switch 109, the input / output control unit 209 outputs the ultraviolet ray amount data and the elapsed time information from the log memory 211 to the encoder 212. The encoder 212 converts the digital data into a pulse width modulated rectangular wave.

FIG. 2C is a diagram illustrating a data structure of data stored in the log memory 211.
The log memory 211 is provided with an ultraviolet ray amount field 213 and an elapsed time field 214.
The ultraviolet ray amount field 213 stores the ultraviolet ray amount calculated by the ultraviolet ray amount calculating unit 208.
The elapsed time field 214 stores the elapsed time measured by the timer 210 from the time when the push button switch 109 was previously pressed, in seconds.

  The low-cost one-chip microcomputer includes a CPU 201, a ROM 202, a RAM 203, a bus 204, an A / D converter 205, and a serial interface 206. On the other hand, a real-time clock that outputs current date and time information (“Real Time Clock”, hereinafter referred to as “RTC”). Is often not equipped. However, the ultraviolet ray amount measuring device 102 needs to transmit the elapsed time indicating how much time the ultraviolet ray amount has been measured together with the ultraviolet ray amount to the data receiving device which is the portable wireless terminal 101. . If the elapsed time, which is relative time information, is known, it is possible to know how much ultraviolet light the skin has received on average during the elapsed time. Therefore, the timer 210 that is reset by the push button switch 109 is driven to measure the elapsed time and record it in the elapsed time field 214 of the log memory 211.

FIG. 3A is a graph showing frequency characteristics of the piezoelectric speaker 207.
The frequency characteristics of the piezoelectric speaker 207 are a bandwidth with a center frequency of about 4 kHz and a frequency band of about several hundred Hz. Almost practically, only a single pitch can be produced.
There are various modulation methods for data communication in the audio frequency band, such as frequency shift keying and phase shift keying. These modulation methods will increase the data transfer rate. The more bandwidth is required. On-off modulation, which may have a narrow bandwidth, is not practical because the data transfer rate is as low as about 100 bps.

Therefore, in the ultraviolet ray amount measuring apparatus 102 of the present embodiment, a rectangular wave voltage is directly applied to the piezoelectric speaker 207 in order to perform data communication in the audio frequency band. Then, since the frequency band of the piezoelectric speaker 207 is very narrow, ringing due to the center frequency occurs at the edges (rising and falling) of the rectangular wave.
FIG. 3B shows a rectangular wave signal (a) applied to the piezoelectric speaker 207, a sound waveform (b) generated from the piezoelectric speaker 207, and a signal waveform (c) converted into a pulse based on the sound generated from the piezoelectric speaker 207. FIG. 4 is a waveform schematic diagram showing a signal waveform (d) obtained by passing a pulse signal through a monostable multivibrator (monomulti). A rectangular wave voltage shown in (a) is applied to the piezoelectric speaker 207. Then, since the frequency band of the piezoelectric speaker 207 is very narrow, as shown in (b), ringing with attenuation due to the center frequency occurs at the edge of the rectangular wave.
When the rising part of the ringing is converted into a pulse, a waveform as shown in (c) is obtained. When the signal shown in (c) is given to the mono-multi, a rectangular wave having the same waveform as (a) can be reproduced as shown in (d).

  In the signal waveform shown in FIG. 3B, it is not known which time point is the high potential portion or the low potential portion of the original signal. Therefore, there is a possibility that the waveform of (d) has an opposite phase to the waveform of (a). However, the ultraviolet light amount measuring apparatus 102 of the present embodiment is not intended to reproduce the phase of the original digital signal, and it is only necessary for the receiving side to grasp “0” and “1”. Therefore, the ultraviolet ray amount measuring apparatus 102 according to this embodiment causes the encoder 212 to perform pulse width modulation. “0” and “1” are expressed by the difference in pulse width.

FIG. 4A is a signal waveform obtained by measuring the sound emitted from the piezoelectric speaker 207 of the ultraviolet ray amount measuring apparatus 102 of the present embodiment with an oscilloscope. It can be seen that there are places where the interval of the ringing waveform is wide and narrow. With this interval, “0” and “1” can be expressed.
FIG. 4B is a signal waveform obtained by partially expanding the waveform of FIG. 4A. However, the amplitude is reduced for the convenience of the drawing. From FIG. 4B, it can be seen that the ringing waveform is a damped oscillation and has a substantially constant frequency. This frequency is a natural vibration frequency of the diaphragm of the piezoelectric speaker 207. It can be said that the ultraviolet ray amount measuring apparatus 102 of this embodiment is hitting the diaphragm of the piezoelectric speaker 207 with an edge of a rectangular wave.

The ultraviolet ray amount measuring apparatus 102 according to this embodiment may cause the piezoelectric speaker 207 to ring based on a rectangular wave. For this reason, the piezoelectric speaker 207 is directly connected to the serial port of the one-chip microcomputer without using an amplifier such as a transistor or an operational amplifier.
Since the piezoelectric speaker 207 is a capacitive load, no through current is generated. Since a sound can be generated only by voltage, a button battery that can take out only a small amount of power can be used for a long period of time. As a result, the ultraviolet light amount measuring apparatus 102 of the present embodiment can achieve extremely low power consumption.

[Hardware configuration and software function of portable wireless terminal 101]
FIG. 5A is a block diagram illustrating a hardware configuration of the portable wireless terminal 101.
The portable wireless terminal 101 that is a data receiving device includes a well-known CPU 501, ROM 502, RAM 503, nonvolatile storage 504 such as a flash memory, a display unit 505 that is a liquid crystal display, an operation unit 506 that is an electrostatic position detection device, An RTC 507 that outputs current date and time information is connected to the bus 508. The transparent electrode operation unit 506 and the display unit 505 constitute a touch panel 509.
In addition to this, the bus 508 has an A / D converter 511 (abbreviated as “A / D” in FIG. 5) to which a microphone 510 used for a call is connected, and a wireless communication unit 512 used for a call or Internet connection. And a D / A converter 514 (abbreviated as “D / A” in FIGS. 5 and 7) to which a speaker 513 used for calling or listening to music is connected.

FIG. 5B is a block diagram illustrating software functions of the portable wireless terminal 101.
The microphone 510 converts sound into an analog sound signal. The analog audio signal is converted into digital audio data by the A / D converter 511, and then the level of the audio data is adjusted by an AGC (Auto Gain Control) 515, and temporarily stored in the temporary memory 516 configured in the RAM 503. Stored.

On the other hand, the non-volatile storage 504 stores waveform data 517 obtained by converting the ringing waveform of the piezoelectric speaker 207 of the ultraviolet ray amount measuring apparatus 102 into digital data.
The waveform correlation processing unit 518 performs a multiplication process and an addition process on the audio data in the temporary memory 516 and the waveform data 517 while shifting the relative time axis. The voice communication data issued by 102 is extracted.
The voice communication data is subjected to digital signal processing equivalent to diode detection by the envelope detector 519, and envelope waveform data is obtained.
The envelope waveform data is compared with a predetermined threshold value by the binarization processing unit 520 and converted to rectangular wave signal data.
The signal data on the rectangular wave is subjected to pulse width demodulation by the decoder 521, and the ultraviolet ray amount data output from the ultraviolet ray amount measuring apparatus 102 is obtained.

The ultraviolet light amount data is temporarily stored as received data 522 in the RAM 503 and then transmitted to the server (not shown) through the input / output control unit 523 to the server (not shown) together with the user identification information. Further, the input / output control unit 523 receives information on the transition of the amount of ultraviolet rays from the server through the wireless communication unit 512 and displays the information on the display unit 505.
The input / output control unit 523 acquires the current time information from the RTC 507 in addition to the relative time information when transmitting the ultraviolet ray amount data to the server, and transmits this to the server. In addition, in response to an instruction operation output from the operation unit 506, the input / output control unit 523 performs execution control of the series of data reception processes described above.

FIG. 6A is a schematic diagram illustrating the operation principle of the waveform correlation processing unit 518.
The audio data (a) acquired from the microphone 510 is multiplied by the waveform data 517 (b) held in the nonvolatile storage 504. At the time of multiplication, if the waveform of the sound data and the waveform data 517 have the same frequency and phase, the multiplication result waveform (c) has a large amplitude that is substantially the same frequency and phase as the waveform of the input signal. Is obtained. However, if the frequency and phase of the waveform (d) of the input signal and the waveform (e) of the waveform data 517 are out of phase, the waveform (f) of the multiplication result has an extremely small amplitude or almost no amplitude. .
That is, only signal components having a high correlation with the waveform data 517 can be extracted from the input signal by multiplication processing.

FIG. 6B is a functional block diagram of the waveform correlation processing unit 518.
The audio data acquired from the microphone 510 is temporarily stored in the first buffer 601 in the temporary memory 516. As an example, it is assumed that audio data composed of 40000 samples is stored in the first buffer 601.
The multiplier 602 multiplies the audio data in the first buffer 601 by the waveform data 517. Waveform data 517 is data for one ringing. As an example, assume that there are 160 samples.

First, the multiplier 602 multiplies the audio data from the first sample to the 160th sample of the first buffer 601 by the first sample to the 160th sample of the waveform data 517.
Next, the multiplier 602 multiplies the audio data from the second sample to the 161st sample of the first buffer 601 by the first sample to the 160th sample of the waveform data 517.
Similarly, the multiplier 602 multiplies the waveform data 517 by shifting the reading start position (pointer) of the first buffer 601 by one sample.

Multiplication data output from the multiplier 602 is delivered to the adder 603. The adder 603 reads the data in the second buffer 604, adds it to the multiplication data, and then writes it back into the second buffer 604 again.
The second buffer 604 in the initial state is filled with “0” data indicating a no-signal state. The addition data output from the adder 603 is overwritten on this, with sequential addition processing.
First, the adder 603 outputs the multiplication data of the audio data from the first sample to the 160th sample of the first buffer 601 and the waveform data 517 and the 160th sample from the first sample of the second buffer 604 output from the multiplier 602. The data up to the sample is added. Since the second buffer 604 in the initial state is “0”, the adder 603 overwrites the multiplication data output from the multiplier 602 as it is from the first sample to the 160th sample of the second buffer 604.

Next, the adder 603 outputs the multiplication data of the audio data from the second sample to the 161st sample of the first buffer 601 and the waveform data 517 output from the multiplier 602, and the second sample 161 of the second buffer 604. The data up to the sample is added. In the region from the first sample to the 160th sample of the second buffer 604, the previous calculation result is written by the processing of the adder 603 immediately before. Therefore, the adder 603 adds the data from the second sample to the 160th sample of the second buffer 604 to the multiplication data output from the multiplier 602. The calculation result is overwritten from the second sample to the 161st sample of the second buffer 604.
Similarly, the adder 603 adds the multiplication data of the multiplier 602 while shifting the reading start position (pointer) of the second buffer 604 by one sample, and overwrites the original position of the second buffer 604. To do.

  By the processing of the waveform correlation processing unit 518, only the component having a high correlation with the waveform data 517 among the audio data stored in the first buffer 601 is stored in the second buffer 604. That is, noise removal is performed with high accuracy.

In the ultraviolet ray amount measuring apparatus 102 composed of a one-chip microcomputer driven by a button battery such as CR2032, the piezoelectric speaker 207 is driven by a rectangular wave formed by the voltage of the button battery. The sound emitted from the piezoelectric speaker 207 is an extremely quiet sound of about −40 dB to −30 dB. At this volume, there will be no inconvenience to the surroundings even in crowded trains.
The strap cord 103 is approximately 3 cm to 5 cm in length. That is, the distance between the piezoelectric speaker 207 of the ultraviolet ray amount measuring apparatus 102 configured as an accessory for mobile phones and the microphone 510 of the data receiving apparatus that is a smartphone is less than 10 cm. The data receiving apparatus of this embodiment can sufficiently perform data communication even when the distance is about 30 cm by the excellent noise removal processing of the waveform correlation processing unit 518.
The voice data communication realized by the ultraviolet ray amount measuring apparatus 102 and the data receiving apparatus according to this embodiment realizes a communication speed of about 1200 bps. Communication can be performed in 1 second or less as long as the amount of ultraviolet rays and the elapsed time are transmitted and received.

Communication between the ultraviolet light amount measuring apparatus 102 and the data receiving apparatus is performed using voice. Since the range in which the ultraviolet ray measuring device 102 and the data receiving device can communicate with each other is a short distance, there is no need for troublesome settings such as wireless LAN and BlueTooth (registered trademark) in consideration of interference and security. . Further, it is not necessary to make the transmission side device and the reception side device face each other in a predetermined positional relationship like NFC (Near field communication) or IrDA. And since smartphones are always equipped with a microphone 510, there is no worry of non-compliance depending on the model.
The only possible disadvantage is that the calculation processing on the receiving side (data receiving device) is enormous compared to the calculation processing on the transmitting side (ultraviolet ray amount measuring device 102). However, most smartphones have such a high computing capacity as to provide a compressed audio data playback function such as MP3. The process of the waveform correlation processing unit 518 for about several seconds is a light process for a smartphone.

  Above all, the ultraviolet ray amount measuring apparatus 102 of the present embodiment has an advantage that it can be manufactured at a very low cost. A low-cost one-chip microcomputer, a low-cost piezoelectric speaker 207, a low-cost photodiode and a photosensitive color changing plate 105 may be prepared. The ultraviolet ray amount measuring apparatus 102 according to the present embodiment does not require a coil for transmitting radio waves or an oscillation circuit that consumes power for emitting radio waves. Therefore, it is not necessary to perform various software and setting work necessary for realizing the communication required for wireless LAN, BlueTooth (registered trademark), and the like.

In the embodiment described above, the following application examples are possible.
(1) The portable wireless terminal 101 can also function as a data transmission device similar to the ultraviolet light amount measurement device 102.
FIG. 7 is a functional block diagram of the portable wireless terminal 101 as the data transmitting apparatus. The block diagram of the hardware configuration is the same as FIG. 5A.
Arbitrary transmission data 701 stored in the nonvolatile storage 504 or the like is subjected to pulse width modulation by the encoder 212. In the pulse width modulation code, waveform data 517 is provided at the edge portion by the waveform generation unit 702. Then, after being converted into an analog signal by the D / A converter 514, sound is output from the speaker 513.
In the case of the ultraviolet ray amount measuring apparatus 102, the pulse width modulation rectangular wave signal output from the encoder 212 directly drives the piezoelectric speaker 207, but in the case of the portable wireless terminal 101, the piezoelectric speaker 207 There is an electromagnetic speaker 513 (dynamic speaker) with much better audio characteristics. For this reason, the same sound as when the piezoelectric speaker 207 is directly driven by a pulse-modulated rectangular wave signal is synthesized using the waveform data 517. That is, the waveform generation unit 702, the waveform data 517, the D / A converter 511, and the speaker 513 imitate the operation of the piezoelectric speaker 207.

The portable wireless terminal 101 can function as both a data transmission device and a data reception device according to the communication method of the present embodiment. That is, the communication method of the present embodiment can be used as a simple data transmission / reception means that replaces IrDA.
The number of smartphones and future phones that are not equipped with IrDA is increasing. The communication method of the present embodiment can realize simple data exchange such as a telephone number or a digital business card even when the portable wireless terminal 101 without IrDA is the other party.

  (2) In the above-described embodiment, the ultraviolet ray amount measuring apparatus 102 is disclosed, but the content of communication is not limited to the ultraviolet ray amount. For example, the data communication function disclosed in the ultraviolet ray amount measuring apparatus 102 of the present embodiment may be mounted on a biological information measuring apparatus such as a pedometer, a thermometer, a pulse oximeter, or a body composition meter. In addition, it is possible to realize a product information public information device that is installed in a store in a store in combination with a proximity sensor and transmits product information to an approaching customer.

(3) The data modulation method is not limited to pulse width modulation. Various digital modulations such as 8-14 modulation well-known for optical disks and the like can be used.
(4) The speaker used for the data transmission device is not necessarily the piezoelectric speaker 207. Even in the case of an electromagnetic speaker, if the frequency characteristic of the diaphragm is a narrow frequency band, natural vibration can be generated at the edge portion only by applying a pulse in the same manner as the piezoelectric speaker 207. However, when an electromagnetic speaker is used, current needs to flow, so that power consumption increases.
The data transmitting apparatus of the present embodiment can be used as long as it is a sounding body that has a narrow frequency band, has a strong peak at a single natural vibration frequency, and emits vibration that attenuates in a short time.

In the present embodiment, the ultraviolet ray amount measuring device 102 that is a data transmitting device and the portable wireless terminal 101 that is a data receiving device are disclosed.
The data transmission device applies a rectangular wave voltage to a sounding body such as the piezoelectric speaker 207 that has a narrow frequency band, has a strong peak at the natural vibration frequency, and emits vibration that attenuates in a short time. Thus, the natural vibration of the sounding body is generated. With a quiet sound, a data transfer rate sufficient to transmit a small amount of data can be realized. Unlike wireless communication using radio waves as a carrier wave, it does not have an oscillation circuit, so it has extremely low power consumption and a small circuit scale.
The data receiving apparatus converts the sound emitted from the data transmitting apparatus into an audio signal by the microphone 510, converts it to digital data by the A / D converter 511, and then uses the waveform data 517 of the sounding body of the data transmitting apparatus. Only voice components with high correlation are extracted. Since the waveform of the sound emitted by the sound generator of the data transmission device is known, extremely high noise removal performance can be realized by storing the sound as waveform data 517 in advance and using it for correlation processing by multiplication.

The embodiment of the present invention has been described above. However, the present invention is not limited to the above-described embodiment, and other modifications may be made without departing from the gist of the present invention described in the claims. Includes application examples.
For example, the above-described exemplary embodiments are detailed and specific descriptions of the configuration of the apparatus and system in order to explain the present invention in an easy-to-understand manner, and are not necessarily limited to those having all the configurations described. . Further, a part of the configuration of one embodiment can be replaced with the configuration of another embodiment, and the configuration of another embodiment can be added to the configuration of one embodiment. Moreover, it is also possible to add, delete, and replace other configurations for a part of the configuration of each embodiment.
Each of the above-described configurations, functions, processing units, and the like may be realized by hardware by designing a part or all of them with, for example, an integrated circuit. Further, each of the above-described configurations, functions, and the like may be realized by software for interpreting and executing a program that realizes each function by the processor. Information such as programs, tables, and files for realizing each function is stored in a memory, a hard disk, a volatile or non-volatile storage such as an SSD (Solid State Drive), or a recording medium such as an IC card or an optical disk. be able to.
In addition, the control lines and information lines are those that are considered necessary for the explanation, and not all the control lines and information lines on the product are necessarily shown. Actually, it may be considered that almost all the components are connected to each other.

DESCRIPTION OF SYMBOLS 101 ... Portable radio | wireless terminal, 102 ... Ultraviolet light amount measuring apparatus, 103 ... Strap cord, 105 ... Photosensitive discoloration board, 106 ... 1st photodiode, 107 ... 2nd photodiode, 108 ... Circuit board, 109 ... Push button switch, 201 ... CPU, 202 ... ROM, 203 ... RAM, 204 ... bus, 205 ... A / D converter, 206 ... serial interface, 207 ... piezoelectric speaker, 208 ... ultraviolet ray amount calculation unit, 209 ... input / output control unit, 210 ... Timer 211 211 Log memory 212 Encoder 213 UV amount field 214 Elapsed time field 501 CPU CPU 502 503 RAM 504 Non-volatile storage 505 Display unit 506 Operation unit 507 ... RTC, 508 ... bus, 509 ... touch panel, 510 Microphone, 511 ... A / D converter, 512 ... wireless communication unit, 513 ... speaker, 514 ... D / A converter, 515 ... AGC, 516 ... temporary memory, 517 ... waveform data, 518 ... waveform correlation processing part, 519 ... envelope detector, 520 ... binarization processor, 521 ... decoder, 522 ... received data, 523 ... input / output controller, 601 ... first buffer, 602 ... multiplier, 603 ... adder, 604 ... second Buffer, 701 ... Transmission data, 702 ... Waveform generator

Claims (6)

A first photodetection unit for converting the intensity of visible light into an analog voltage signal, wherein a photosensitive part is shielded by a photosensitive color changing plate coated with a photochromic dye;
A second photodetection unit having substantially the same electrical characteristics as the first photodetection unit, wherein the photosensitive part is not shielded by a shield that shields light;
An A / D converter that converts output signals of the first light detection unit and the second light detection unit into digital data;
An ultraviolet ray amount calculating unit for calculating an ultraviolet ray amount based on the digital data of the first light detecting unit and the second light detecting unit;
An encoder that converts the data of the amount of ultraviolet light into a rectangular wave signal;
An ultraviolet ray amount measuring apparatus, comprising: a sounding body that receives the rectangular wave signal and generates a sound at an edge of the rectangular wave signal and has a peak at a single natural vibration frequency and emits a damping vibration. The encoder performs modulation to express data with a difference in period of a rectangular wave.
The ultraviolet ray amount measuring apparatus according to claim 1. A first photodetection unit for converting the intensity of visible light into an analog voltage signal, wherein a photosensitive part is shielded by a photosensitive color changing plate coated with a photochromic dye;
A second photodetection unit having substantially the same electrical characteristics as the first photodetection unit, wherein the photosensitive part is not shielded by a shield that shields light;
An A / D converter that converts output signals of the first light detection unit and the second light detection unit into digital data;
An ultraviolet ray amount calculating unit for calculating an ultraviolet ray amount based on the digital data of the first light detecting unit and the second light detecting unit;
An encoder that converts the data of the amount of ultraviolet light into a rectangular wave signal;
A waveform that receives the rectangular wave signal and generates voice data that generates sound using waveform data of a sounding body that has a peak at a single natural vibration frequency at the edge of the rectangular wave signal and emits a vibration that attenuates A generator,
An ultraviolet ray amount measuring device comprising a speaker that generates sound based on the audio data. The encoder performs modulation to express data with a difference in period of a rectangular wave.
The ultraviolet ray amount measuring apparatus according to claim 3. An ultraviolet ray amount measuring system comprising an ultraviolet ray amount measuring device and a data receiving device,
The ultraviolet ray amount measuring device is
A first photodetection unit for converting the intensity of visible light into an analog voltage signal, wherein a photosensitive part is shielded by a photosensitive color changing plate coated with a photochromic dye;
A second photodetection unit having substantially the same electrical characteristics as the first photodetection unit, wherein the photosensitive part is not shielded by a shield that shields light;
An A / D converter that converts output signals of the first light detection unit and the second light detection unit into digital data;
An ultraviolet ray amount calculating unit for calculating an ultraviolet ray amount based on the digital data of the first light detecting unit and the second light detecting unit;
An encoder that converts the data of the amount of ultraviolet light into a rectangular wave signal;
A sounding body that receives the rectangular wave signal and generates sound at an edge of the rectangular wave signal, has a peak at a single natural vibration frequency, and emits vibration that attenuates;
The data receiving device is:
With a microphone,
An A / D converter for converting an audio signal output from the microphone into digital audio data;
A waveform correlation processing unit that calculates the correlation between the sound data and the waveform data of a sounding body that has a peak at a single natural vibration frequency and emits a damping vibration;
An ultraviolet ray amount measuring system, comprising: a decoder that outputs data based on the correlation data output by the waveform correlation processing unit. The decoder extracts data from a modulated signal in which data is represented by a difference in the period of a rectangular wave.
The ultraviolet ray measurement system according to claim 5.

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