JP2011177499A - Thermometer - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a setting type thermometer 101 which is low-priced and has a non-touch system. <P>SOLUTION: The setting type thermometer 101 keeps a red LED and a thermopile sensor in a visible manner buried in the surface of a half mirror. A person to be measured projects the person's own face on the half mirror to adjust a distance between the half mirror and the person's own face so that the lighting red LED may take a position at the center of the person's own forehead and further the position may coinside with the thermopile sensor. The thermometer 101 has a positional relationship determined to measure the temperature of a position at which the thermopile sensor coinsides on the point for the red LED to irradiate the forehead. In this positional relationship, the thermopile sensor catches the infrared ray emitted from the person's forehead, and a microcomputer calculates to give the temperature of a body surface or a body. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a non-contact type thermometer.

A new influenza virus confirmed in Mexico in April 2009 (pandemic influenza A (H1N1)) was prevalent worldwide, and the cumulative estimated number of patients from the 28th to 51st week in 2009 is approximately 16.53 million in Japan. It is estimated to be a person (https://hasseidoko.mhlw.go.jp/Hasseidoko/Levelmap/flu/new_jmap.html).
Against this background, in order to prevent the spread of influenza and other infections, there is an increasing need for devices that instantaneously measure the temperature of people at the entrances of buildings such as public institutions and companies where many people gather.

Special Table 2000-513975

Unit shape surface temperature checker TP-U0260ET (Thermopics Ai): [Search January 6, 2010], Internet <URL: http://www.yamagata-chino.co.jp/product/tp-u.html>

Patent Document 1 discloses a pen-type non-contact thermometer. Using a thermopile sensor, the body temperature is measured about 3 cm away from the forehead of the subject. Since it is a non-contact type, there is no risk of infection such as pathogenic bacteria due to contact, but since it is necessary for the doctor or nurse to face the person to be measured, the possibility of air infection cannot be eliminated.
Non-Patent Document 1 discloses a stationary non-contact type thermometer. An infrared camera is used to photograph the face of the measurement subject, recognize the forehead, and then measure the body temperature from the surface temperature of the forehead. It is excellent in that it is non-contact and does not need to be face-to-face operated, but an infrared camera is expensive.
From the background as described above, there is a demand for a stationary thermometer that can be introduced at a low price in the market.

  An object of the present invention is to solve the problems and provide a stationary thermometer that is low-cost and non-contact.

  In order to solve the above-described problem, the thermometer of the present invention includes a mirror capable of projecting a forehead of a person to be measured, a light emitting unit provided on the mirror and irradiating light on the forehead of the person to be measured, A temperature measurement sensor that is provided adjacent to the light emitting unit and measures the surface temperature of the forehead of the person to be measured, and calculates the body surface temperature or body temperature of the person to be measured based on a signal obtained from the temperature measurement sensor. A temperature data calculation unit that outputs data and a display unit that displays temperature data are provided.

  By combining the light emitting unit and the temperature measurement sensor with a mirror, the person to be measured can adjust the distance between the thermometer and his face, and the distance and angle between the thermometer body and the forehead of the person to be measured are easy. Can be fixed. Further, measurement of the body surface temperature or body temperature can be realized with high accuracy without contact and without the presence of an operator.

  According to the present invention, it is possible to provide a stationary thermometer that is low-cost and non-contact.

It is an external appearance perspective view of the thermometer which concerns on 1st embodiment of this invention. It is a disassembled perspective view of the thermometer which concerns on 1st embodiment of this invention. It is sectional drawing of a top plate. It is a block diagram which shows the hardware constitutions of the thermometer which concerns on 1st embodiment of this invention. It is a block diagram explaining the function of the software of the thermometer which concerns on 1st embodiment of this invention. It is a flowchart which shows the flow of the whole operation | movement of the thermometer which concerns on 1st embodiment of this invention. It is a flowchart which shows the flow of a measurement process of the thermometer which concerns on 1st embodiment of this invention. It is a figure which shows the state where a to-be-measured person reflected his face on the top plate of the thermometer. It is the schematic which shows the positional relationship of a to-be-measured person and a thermometer. It is an external appearance perspective view of the thermometer which concerns on 2nd embodiment of this invention. It is a block diagram which shows the hardware constitutions of the thermometer which concerns on 2nd embodiment of this invention. It is a block diagram explaining the function of the software of the thermometer which concerns on 2nd embodiment of this invention. It is a flowchart which shows the flow of a measurement process of the thermometer which concerns on 2nd embodiment of this invention. It is the schematic which shows the positional relationship of a to-be-measured person and a thermometer from a viewpoint which looks down at a to-be-measured person and a thermometer from the head of a to-be-measured person.

[Outline of thermometer]
An outline of an embodiment of the present invention will be described.
In the stationary thermometer according to the present embodiment, the red LED and the thermopile sensor are embedded in the surface of the half mirror in a visible state. The person to be measured shows his / her face on the half mirror. At that time, the half mirror and the face of the person to be measured are positioned so that the red LED that emits light is positioned at the center of the forehead and the position coincides with the position of the thermopile sensor that the person to be measured can see from the half mirror. Adjust the distance. The thermometer measures the body surface temperature of the measurement subject at the position where the red LED illuminates the forehead and the thermopile sensor on the face of the measurement subject reflected on the half mirror (see FIGS. 8 and 9). Therefore, the positional relationship is determined. In this state, the thermopile sensor captures infrared rays emitted from the forehead of the measurement subject, and the microcomputer calculates the body surface temperature or body temperature.

[First Embodiment: Appearance and Internal Configuration of Thermometer 101]
FIG. 1 is an external perspective view of a thermometer 101 according to the first embodiment of the present invention.
In the thermometer 101, the top plate 103 of the main body 102 forms a mirror. The main body 102 is inclined at an angle of about 70 ° by the base 104.
A half mirror film 105 is attached to the back surface of the acrylic top plate 103 and functions as a mirror. A first LCD unit 106 is fixed on the upper side and a second LCD unit 107 is fixed on the lower side of the half mirror film 105 on the back surface of the top plate 103. The half mirror film 105, which is also known as a magic mirror, is a film that is attached to a transparent plate such as acrylic or glass to form a half mirror, and is made of a material such as a dielectric multilayer film or a metal thin film.

Through the half mirror film 105, the current date and time, temperature and humidity are displayed on the first LCD unit 106, and the body surface temperature of the measurement subject is displayed on the second LCD unit 107. That is, the display characters of the first LCD unit 106 and the second LCD unit 107 appear to emerge from the mirror. This is a measure for effectively utilizing the limited area of the device as well as the visual beauty that can be found in recent mobile phones and the like.
Note that the first LCD unit 106 and the second LCD unit 107 incorporate a backlight LED for illuminating the display of characters displayed on the liquid crystal display element.

A light emitting opening 109 of the red LED unit 108 that can be called a light emitting portion is provided on the top plate 103 below the first LCD unit 106.
An infrared light receiving opening 111 of a thermopile sensor unit 110 that can be called a temperature measurement sensor is provided on the top plate 103 below the light emitting opening 109 of the red LED unit 108.
A power switch 112 and a push button switch 113 for date and time calibration are provided on the side surface of the main body 102.

FIG. 2 is an exploded perspective view of the thermometer 101.
The top plate 103 includes a transparent acrylic plate 202, a half mirror film 105 attached to the back thereof, and a fixing plate 203 for fixing components to be described later.
The acrylic plate 202 is provided with a light emitting opening 109 and an infrared light receiving opening 111.
In addition to the light emitting opening 109 and the infrared light receiving opening 111, the fixed plate 203 includes a first LCD opening 204 into which the first LCD unit 106 is fitted, and a second LCD opening 205 into which the second LCD unit 107 is fitted. Is provided.
The red LED unit 108 and the thermopile sensor unit 110 are fixed through the acrylic plate 202 and the fixed plate 203.

The first LCD unit 106 is fixed to the first LCD opening 204, and the second LCD unit 107 is fixed to the second LCD opening 205, and is in close contact with the half mirror film 105 attached to the back surface of the acrylic plate 202.
The red LED unit 108, the thermopile sensor unit 110, the first LCD unit 106 and the second LCD unit 107 are connected to the substrate 206.
The substrate 206 is provided with a humidity sensor 207 in addition to a circuit centered on a microcomputer (not shown).
In addition, a speaker 209 that can be called an audio transmission unit is attached to the back case 208 of the main body to which the substrate 206 is fixed, and the speaker 209 is connected to the substrate 206.

3A and 3B are cross-sectional views of the top plate 103. FIG. FIG. 3 shows a state viewed in the direction of the arrow aa ′ in FIG.
3A is a sectional view of the entire top plate 103, and FIG. 3B is an enlarged sectional view of only the red LED unit 108 and the thermopile sensor unit 110. FIG.
As described above with reference to FIG. 2, the red LED unit 108 and the thermopile sensor unit 110 are fixed through the acrylic plate 202 and the fixing plate 203. The red LED unit 108 and the thermopile sensor unit 110 are each fixed with an angle.

  In the red LED unit 108, a red LED element 302, a condenser lens 303a, and a cover 307a are housed in a tube 304. The light of the red LED element 302 is collected by the condenser lens 303a and is configured to focus on the surface of the forehead of the measurement subject approximately 20 cm away. The red LED unit 108 is inclined downward by about 16.7 ° with respect to the vertical line of the top plate 103.

  In the thermopile sensor unit 110, a thermopile sensor 305, a condenser lens 303b, and a cover 307b are housed in a tube 306. Infrared light emitted from the forehead of the measurement subject approximately 20 cm away is collected by the condenser lens 303 b and focused by the thermopile sensor 305. The thermopile sensor unit 110 is inclined approximately 4.3 ° upward with respect to the vertical line of the top plate 103.

  The distance between the red LED unit 108 and the thermopile sensor unit 110 is 7.5 cm. This distance, and the angle provided in each of the red LED unit 108 and the thermopile sensor unit 110 described above, indicates that when the person to be measured is located at a distance of about 20 cm from the thermometer 101, the emission point of the red LED unit 108 is It is assumed that the thermopile sensor unit 110 is overlapped with the light emitting point at a place located on the forehead of the face of the person to be measured, which is reflected on the mirror (top plate 103) from the eye of the person to be measured. These positional relationships will be described in detail with reference to FIGS.

FIG. 4 is a block diagram showing a hardware configuration of the thermometer 101.
The thermometer 101 is configured around a known microcomputer. In addition to the well-known CPU 403, ROM 404, and RAM 405, the bus 402 includes an LCD display unit 406, a backlight LED 407 that irradiates the LCD display unit 406, a red LED element 302, an audio interface 408, and an A / D converter 410. It is connected. The LCD display unit 406 indicates the first LCD unit 106 and the second LCD unit 107 described with reference to FIGS. Although not explicitly shown in FIG. 4, a real-time clock for acquiring date / time data to be displayed on the first LCD unit 106 is connected to the bus 402.

The thermopile sensor 305 is a complex of an infrared sensor 411 and a reference temperature sensor 412 and is connected to a temperature signal generation unit 413 of an analog circuit. An output signal of the temperature signal generation unit 413 is supplied to the A / D converter 410. Further, the temperature signal generation unit 413 is controlled to supply power through the bus 402.
In general, the thermopile sensor outputs the difference between the temperature of the object and the ambient temperature. Therefore, in order to measure the temperature of the object, the output signal of the reference temperature sensor 412 is used with respect to the output signal of the infrared sensor 411. It is necessary to add. An amplifier circuit including an adding circuit for this purpose is the temperature signal generation unit 413.
On the other hand, the output signal of the humidity sensor 207 is also supplied to the A / D converter 410.

  When the thermometer 101 enters a state of measuring the body surface temperature, the audio interface 408 utters a message according to the usage guidance and the measurement result to the measurement subject through the speaker 209. Audio data for this purpose is stored in the ROM 404.

FIG. 5 is a block diagram for explaining the software functions of the thermometer 101.
The program stored in the ROM 404 functions as an operation mode control unit 502, a temperature data calculation unit 503, and an intermittent control unit 504 by the CPU 403 and the RAM 405.
The analog temperature voltage signal output from the temperature signal generation unit 413 is converted into digital data by the A / D converter 410 and input to the temperature data calculation unit 503.

The temperature data calculation unit 503 continuously acquires data from the thermopile sensor 305 and stores the data in the RAM 405. The RAM 405 constitutes a known ring buffer.
If the data of the thermopile sensor 305 stored in the ring buffer is not less than 31 ° C. and the temperature fluctuation range of the predetermined number of sample data falls within the predetermined fluctuation allowable value, the sample data Is a valid value. Then, the total average value of the valid sample data is determined as the measured body surface temperature and displayed on the LED display unit (second LCD unit 107).

The “predetermined number” of sample data is determined by the measurement time and the sampling frequency. For example, if the measurement time is 0.5 seconds and the sampling frequency is 1 kHz, the number of sample data is 500 samples. It is desirable that the ring buffer has a capacity that can store the number of samples more than twice the number of samples.
The allowable fluctuation value is determined based on the trend of the temperature measurement value until the person to be measured approaches the thermometer 101 and reaches a state of being stationary before the thermometer 101. The temperature variation range of the data of all 500 samples is, for example, 0.3 ° C.

By the way, the thermometer 101 of 1st embodiment of this invention is comprised so that it may operate | move when a to-be-measured person approaches. That is, when the person to be measured is not in front of the thermometer 101, it is not necessary to operate, so it is desirable to reduce power consumption as much as possible.
From the block diagram shown in FIG. 4, the temperature signal generation unit 413 configured with an operational amplifier and the A / D converter 410 tend to consume more power than the microcomputer centering on the CPU 403. Therefore, during non-measurement (hereinafter referred to as “power save mode”, and the state during measurement is referred to as “measurement mode”), an intermittent operation is performed only to detect the presence or absence of the measurement subject.
For example, the operational amplifier is provided with intermittent power supply for capturing data of about 10 samples at a sampling frequency of 1 kHz per second, and the A / D converter 410 reduces the number of output bits, thereby reducing power consumption. If there is a mode, this is specified, and an intermittent operation that operates with the operational amplifier is performed. The intermittent control unit 504 realizes such an operation. In the power save mode, power is not supplied to the LCD display unit 406, the backlight LED 407, and the red LED element 302 for illuminating the forehead.

  That is, in the power save mode, the thermopile sensor 305 functions as a human sensor. In the power save mode, in order to make the thermopile sensor 305 function as a human sensor, it is preferable to detect whether or not the difference between the output signal of the infrared sensor 411 and the output signal of the reference temperature sensor 412 exceeds a predetermined temperature difference. . Alternatively, for example, 33 ° C. may be set as a predetermined reference temperature, and if it exceeds this, it may be determined that the presence of a person has been detected.

When the operation mode control unit 502 detects that the person to be measured has approached through the temperature data calculation unit 503, the operation mode control unit 502 switches the operation from the power save mode to the measurement mode.
When the operation mode control unit 502 instructs the intermittent control unit 504 to perform a continuous operation, the intermittent control unit 504 supplies power to the temperature signal generation unit 413 and the A / D converter 410 continuously, and the A / D converter 410 is also switched to the measurement mode. At the same time, the operation mode control unit 502 causes the red LED element 302 for illuminating the forehead and the backlight LED 407 of the LCD display unit 406 to emit light.

[First Embodiment: Measurement Operation of Thermometer 101]
FIG. 6 is a flowchart showing an overall operation flow of the thermometer 101.
When the process is started (S601), the operation mode control unit 502 first performs an initialization operation such as measuring the temperature around the thermometer 101 through the reference temperature sensor 412 (S602).
Next, the operation mode control unit 502 once enters the power save mode (S603). In this power save mode, specifically, the red LED element 302 is turned off, and the temperature signal generation unit 413 (analog circuit) and the A / D converter 410 are intermittently operated through the intermittent control unit 504, and the A / D converter 410 is operated. Is set to the power saving mode, the LCD display unit 406 is turned off, and the backlight LED 407 is turned off.

Subsequent processing is loop processing.
The operation mode control unit 502 confirms whether or not a person (a person to be measured) has approached through the temperature data calculation unit 503 (S604). If the presence of a person is recognized (YES in S604), measurement processing is executed (S605), and the presence of a person is confirmed again (S604).
If it is recognized in step S604 that there is no person (NO in S604), the operation mode control unit 502 next checks whether or not a first predetermined time has elapsed since the end of the previous measurement (S606). The “first predetermined time” is a time that is a timeout for shifting from the measurement mode to the power save mode. For example, 30 seconds.
If the first predetermined time has not elapsed in step S606 (NO in S606), the presence of a person is confirmed again (S604).

If the first predetermined time has elapsed in step S606 (YES in S606), the operation mode control unit 502 next determines whether or not the second predetermined time has elapsed since the execution of the immediately previous initialization process. Confirmation is made (S607). The “second predetermined time” is a time for performing the initialization process periodically, such as the thermometer 101 confirming and calibrating the ambient temperature. For example, 5 minutes.
If the second predetermined time has not elapsed in step S607 (NO in S607), the operation mode control unit 502 executes the power save mode (S603).
If the second predetermined time has elapsed in step S607 (YES in S607), the operation mode control unit 502 ends the series of processes (S608). Since a series of processes are always looped, the process is started again from step S601. As a result, the initialization process (S602) is executed every time the second predetermined time elapses.

FIG. 7 is a flowchart showing the flow of measurement processing. This is the content of step S605 in FIG.
When the process is started (S701), the operation mode control unit 502 first switches the operation mode from the power save mode to the measurement mode (S702). In this measurement mode, specifically, the red LED element 302 is turned on, the temperature signal generation unit 413 (analog circuit) and the A / D converter 410 are continuously operated through the intermittent control unit 504, and the A / D converter 410 is operated. The normal operation mode is set, the LCD display unit 406 is turned on, and the backlight LED 407 is turned on. That is, the operation is the reverse of step S603 in FIG.

Next, the operation mode control unit 502 controls the temperature data calculation unit 503 to record the data calculated by the temperature data calculation unit 503 in the ring buffer (S703).
Then, the temperature data calculation unit 503 verifies the data in the ring buffer. As described above with reference to FIG. 5, the average value of a predetermined number of sample data stored in the ring buffer is 31 ° C. or more, and the temperature fluctuation range (upper limit value−lower limit value) is predetermined. It is checked whether or not the fluctuation allowable value (threshold value) is within 0.3 ° C. (S704). As a result of the confirmation, if the condition is not satisfied (NO in S704), the process returns to step S703 again, and the data fetching (S703) and the calculation (S704) are repeated.
As a result of the confirmation, if the condition is satisfied (YES in S704), the temperature data calculation unit 503 writes the average value as a measured value in the RAM 405 (S705), and displays the value on the second LCD (S706). A series of processing ends (S707).

[First Embodiment: Positional Relationship between Thermometer 101 and Person to be Measured]
FIG. 8 is a diagram illustrating a state in which the measurement subject reflects his / her face on the top plate 103 of the thermometer 101.
FIG. 9 is a schematic diagram showing the positional relationship between the person to be measured and the thermometer 101.
As shown in FIGS. 8 and 9, the greatest feature of the thermometer 101 of the first embodiment of the present invention is that the measurement subject 901 reflects the light emitting point of the red LED unit 108 while reflecting his / her face on the mirror. It is possible to easily fix the distance and angle between the thermometer 101 main body and the forehead of the person 901 to be measured by combining the light emitting point and the thermopile sensor unit 110 embedded in the mirror while applying to the forehead. There is a point that can be done.

  The state shown in FIG. 8 is a state in which the person to be measured 901 is at the normal position P902 shown in FIG. From the eye of the person to be measured 901, he / she is looking at himself (virtual video V903) behind the mirror (top plate 103 of the thermometer 101). At that time, the line of sight of the person to be measured 901 is virtual. Looking up at the forehead of the video V903, the thermopile sensor unit 110 is present there, so the thermopile sensor unit 110 appears to overlap the forehead. On the other hand, the light emitted from the red LED unit 108 illuminates the forehead of the measurement subject 901. The position in a state that exactly matches the forehead of the virtual video V903 is the normal position P902.

On the other hand, when the person to be measured 901 approaches the mirror from the normal position P902 (position P904), the irradiation point of the light emitted from the red LED unit 108 is on the forehead of the person to be measured 901 on the virtual video V903. The position of the visible thermopile sensor unit 110 is shifted upward.
On the contrary, when the person to be measured 901 moves away from the normal position P902 toward the mirror (position P905), the irradiation point of the light emitted from the red LED unit 108 is the forehead of the person to be measured 901 on the virtual video V903. The thermopile sensor unit 110 can be seen below the visible position.

As shown in FIG. 9, the person to be measured 901 indicates the distance between the thermometer 101 and his / her face, the forehead reflected in the mirror, the irradiation point of the light emitted from the red LED unit 108, the thermopile sensor unit 110, The distance and angle between the thermometer 101 main body and the forehead of the person to be measured 901 can be easily fixed.
Once the distance and angle between the thermometer 101 main body and the forehead of the person to be measured 901 are fixed, the measurement of the body surface temperature using the thermopile sensor 305 can be realized with high accuracy.

  As described above, the mirror formed by the top plate 103 of the thermometer 101 according to the first embodiment of the present invention needs to have at least an area necessary for projecting the forehead of the person 901 to be measured. is there. When designed based on the size of a typical adult face, a width of at least 10 cm and a length of about 7 cm are required at a minimum. Desirably, it is desirable that the area that can reflect the entire face is about 20 cm in width and about 30 cm in length, or larger.

[Second Embodiment: Appearance and Internal Configuration of Thermometer 1001]
FIG. 10 is an external perspective view of a thermometer 1001 according to the second embodiment of the present invention.
The same components of the thermometer 1001 as those of the thermometer 101 of the first embodiment are denoted by the same reference numerals and description thereof is omitted.
The thermometer 1001 is different from the thermometer 101 of the first embodiment in appearance in that the red LED unit 1008 provided immediately above the thermopile sensor unit 110 in the thermometer 101 is different from the thermometer 1001 in the thermometer 1001. It is provided on the left side of the thermopile sensor unit 110 and (b) a distance sensor 1002 is newly provided.
A distance sensor 1002 that can also be referred to as a distance measuring unit is fixed to the back of the top plate 103 in the same manner as the first LCD unit 106 and the second LCD unit 107.
The distance sensor 1002 is a distance measuring device using a well-known triangulation method that incorporates an infrared LED, a photodiode, and a signal processing circuit, and outputs a result of measuring the distance as an analog voltage signal.

FIG. 11 is a block diagram showing a hardware configuration of the thermometer 1001.
In FIG. 11, as in FIG. 10, the same components as those of the thermometer 101 of the first embodiment of the thermometer 1001 are denoted by the same reference numerals and description thereof is omitted.
In FIG. 11, the difference from the block diagram of FIG. 4 is that the distance sensor 1002 is connected to the A / D converter 410.

FIG. 12 is a block diagram for explaining the software functions of the thermometer 1001.
Also in FIG. 12, like FIG.10 and FIG.11, the component same as the thermometer 101 of 1st embodiment of the thermometer 1001 attaches | subjects the same code | symbol, and abbreviate | omits description.
12 is different from the block diagram of FIG. 5 in that (a) the A / D converter 410 operates in a time-sharing manner, and therefore the A / D converter 410a that processes the output signal of the temperature signal generation unit 413 is different from the block diagram of FIG. The A / D converter 410b that processes the distance measurement signal output from the distance sensor 1002 is shown separately, and (b) the distance sensor 1002 is connected to the operation mode control unit 502 through the A / D converter 410b. It has been done.

Similarly to the thermometer 101 of the first embodiment of the present invention, the thermometer 1001 of the second embodiment of the present invention is configured to operate when the person to be measured approaches. That is, when the person to be measured is not in front of the thermometer 1001, it is not necessary to perform a temperature measurement operation, so it is desirable to reduce power consumption as much as possible.
Therefore, the thermometer 1001 performs an intermittent operation for measuring the temperature through the reference temperature sensor 412 for measuring the temperature of the thermopile sensor 305 and an operation for detecting the presence / absence of the person to be measured through the distance sensor 1002 in the power saving mode. .
Actually, since the A / D converter 410 operates in a time-sharing manner, the A / D converter 410 uses the temperature measurement signal output from the temperature signal generation unit 413 through the reference temperature sensor 412 and the distance output from the distance sensor 1002. Convert measurement signals in time division.
The operation mode control unit 502 receives distance measurement information based on the distance measurement signal of the distance sensor 1002 obtained from the A / D converter 410b. When the distance sensor 1002 detects a human body within a range of, for example, 60 cm, the operation mode control unit 502 recognizes that the distance measurement information is within a threshold range corresponding to 60 cm, and thus the range from the thermometer 1001 to 60 cm. Recognize that there is a human body inside. Then, the operation mode control unit 502 controls the intermittent control unit 504, whereby the thermometer 1001 returns to the measurement mode.
That is, the thermometer 1001 includes a distance sensor 1002 as a dedicated human sensor, unlike the thermometer 101 that causes the thermopile sensor 305 to function as a human sensor.

When the operation mode control unit 502 detects that the person to be measured has approached through the A / D converter 410b, the operation mode control unit 502 switches the operation from the power save mode to the measurement mode.
When the operation mode control unit 502 instructs the intermittent control unit 504 to perform a continuous operation, the intermittent control unit 504 supplies power to the temperature signal generation unit 413 and the A / D converter 410a continuously, and the A / D converter 410a is also switched to the measurement mode. At the same time, the operation mode control unit 502 causes the red LED element 302 for illuminating the forehead and the backlight LED 407 of the LCD display unit 406 to emit light.

Furthermore, if the distance data obtained from the distance sensor 1002 through the A / D converter 410b and indicating the distance between the thermometer 1001 and the person to be measured is within a range of, for example, 30 cm ± 2 cm, the operation mode control unit 502 displays the temperature data. The operation unit 503 is instructed to calculate the temperature.
That is, the distance sensor 1002 outputs information for instructing switching between the power save mode and the measurement mode and information for instructing a trigger for the measurement operation.
If the measurement distance is more than 30 cm + 2 cm or too close to 30 cm-2 cm, the LCD display unit 406 displays a message that prompts the subject to adjust the distance instead of lighting the red LED element 302. Thus, it is possible to assist the distance adjustment of the measurement subject.

The measurement operation of the thermometer 1001 of the second embodiment is the same as that of the thermometer 101 of the first embodiment except for a part.
FIG. 13 is a flowchart showing the flow of measurement processing. This is the content of step S605 in FIG.
The difference between the measurement process shown in FIG. 13 and the measurement process of FIG. 7 related to the thermometer 101 of the first embodiment is a thermometer 1001 obtained from the distance sensor 1002 between step S702 and step S703. Step S1301 for confirming whether or not the distance between the measurement subject and the person to be measured is within the range of 30 cm ± 2 cm is added.

[Second Embodiment: Positional Relationship between Thermometer 1001 and Person to be Measured]
FIG. 14 is a schematic diagram illustrating the positional relationship between the person to be measured 901 and the thermometer 1001 from the viewpoint of looking down on the person to be measured 901 and the thermometer 1001 from above the person to be measured 901.
The thermometer 1001 can be understood as the one in which the positional relationship between the red LED unit 108 and the thermopile sensor unit 110 is the same as that of the thermometer 101 of the first embodiment.
In a state where the person to be measured 1401 is in the normal position P1402, from the viewpoint of the person to be measured 1401, he / she is looking at himself (virtual image V1403) behind the mirror (top plate 103 of the thermometer 1001). However, when the line of sight of the person 1401 to be measured looks at the forehead of the virtual video V1403, the thermopile sensor unit 110 is present there, so that the thermopile sensor unit 110 appears to overlap the forehead. On the other hand, the light emitted from the red LED unit 108 illuminates the forehead of the person 1401 to be measured (point P1310). The position in a state that exactly matches the forehead of the virtual video V1403 is the normal position P1402.

On the other hand, when the person to be measured 1401 approaches the mirror from the normal position P1402 (position P1404), the irradiation point of the light emitted from the red LED unit 108 is on the forehead of the person to be measured 1401 on the virtual video V1403. The point moves to the left side point P1405 from the position of the visible thermopile sensor unit 110.
On the contrary, when the person to be measured 1401 moves away from the normal position P1402 toward the mirror (position P1406), the irradiation point of the light emitted from the red LED unit 108 is the forehead of the person to be measured 1401 on the virtual video V1403. The position P1407 on the right side of the position of the thermopile sensor unit 110 that is visible in FIG.

As shown in FIG. 9, the person to be measured 1401 indicates the distance between the thermometer 1001 and his / her face, the forehead reflected in the mirror, the irradiation point of the light emitted from the red LED unit 108, the thermopile sensor unit 110, The distance between the thermometer 1001 main body and the forehead of the person to be measured 1401 can be easily fixed by adjusting so as to match.
Once the distance between the thermometer 1001 main body and the forehead of the person 1401 to be measured is fixed, the measurement of the body surface temperature using the thermopile sensor 305 can be realized with high accuracy.

This embodiment can be applied as follows.
(1) A measurement start switch may be provided to explicitly instruct the operation mode control unit 502 to shift from the power save mode to the measurement mode.

  (2) The processes in steps S704 and S705 surrounded by the dotted line in FIG. 7 are an example of an algorithm for measuring the body surface temperature of the measurement subject. Not limited to steps S704 and S705, for example, the average and variance of the data in the ring buffer are obtained, and the average value is output when the variance falls below a predetermined threshold, and the average value is acquired a predetermined number of times within a predetermined time, Various algorithms such as outputting an average value of the plurality of average values can be applied.

  (3) The infrared condensing means of the thermopile sensor unit 110 is not limited to the condensing lens 303b, and may be, for example, an elongated hole.

  (4) Since the top plate 103 only needs to function as a mirror, it is not necessarily a half mirror.

  (5) The temperature data calculation unit 503 may calculate the body temperature from the measured body surface temperature. In this case, the thermometer 101 or the thermometer 1001 is a thermometer.

(6) Instead of displaying the body surface temperature or body temperature on the LCD display unit 406, the body surface temperature or body temperature can be read out by voice synthesis.
Also, instead of displaying specific values of body surface temperature or body temperature, if there is heat (for example, 37 ° C. or more), a light emitting body such as an LED emits red light, and if it is normal (for example, less than 37 ° C.) A display mode in which the illuminant emits blue light can also be employed.

  (7) The thermopile sensor 305 may be a thermopile sensor equipped with a lens. In this case, the condenser lens 303b in FIG. 3 is not necessary.

In the present embodiment, a non-contact type thermometer has been disclosed.
By combining an inexpensive thermopile sensor with a mirror, the person to be measured can adjust the distance between the thermometer and his face, and the distance between the thermometer and the forehead of the person to be measured can be easily fixed. it can. And measurement of body surface temperature can be realized with high accuracy without contact and without the presence of an operator.
In the thermometer of this embodiment, the thermopile sensor 305 for measuring the body surface temperature or body temperature of the measurement subject can also be used as a human sensor in the power save mode.

  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.

 DESCRIPTION OF SYMBOLS 101 ... Thermometer, 102 ... Main part, 103 ... Top plate, 104 ... Base, 105 ... Half mirror film, 106 ... First LCD unit, 107 ... Second LCD unit, 108 ... Red LED unit, 109 ... Light emission opening 110 ... Thermopile sensor unit, 111 ... Infrared light receiving opening, 112 ... Power switch, 113 ... Push button switch, 202 ... Acrylic plate, 203 ... Fixed plate, 204 ... First LCD opening, 205 ... Second LCD opening , 206 ... Substrate, 207 ... Humidity sensor, 208 ... Main body back case, 209 ... Speaker, 302 ... Red LED element, 303a ... Condensing lens, 303b ... Condensing lens, 304 ... Tube, 305 ... Thermopile sensor, 306 ... Tube 307a ... Cover, 307b ... Cover, 402 ... Bus, 403 ... CPU, 404 ... ROM 405 ... RAM, 406 ... LCD display, 407 ... backlight LED, 408 ... audio interface, 410 ... A / D converter, 410a ... A / D converter, 410b ... A / D converter, 411 ... infrared sensor, 412 ... Reference temperature sensor, 413 ... Temperature signal generator, 500 ... All, 502 ... Operation mode controller, 503 ... Temperature data calculator, 504 ... Intermittent controller, 901 ... Person to be measured, 1001 ... Thermometer, 1002 ... Distance sensor, 1008 ... Red LED unit, 1401 ... Person to be measured

Claims (8)

A mirror that can reflect the forehead of the person being measured,
A light emitting unit provided on the mirror for irradiating the forehead of the person to be measured;
A temperature measuring sensor provided adjacent to the light emitting part of the mirror and measuring a surface temperature of the forehead of the person to be measured;
A temperature data calculation unit that calculates the body surface temperature or body temperature of the measurement subject based on a signal obtained from the temperature measurement sensor and outputs temperature data; and
A thermometer comprising a display unit for displaying the temperature data. The light emitting unit is inclined by a predetermined angle with respect to a vertical line of the mirror in order to irradiate light on the forehead of the subject.
The temperature measurement sensor is an irradiation point of the light emitted from the light emitting unit on the forehead of the measurement subject reflected in the mirror when the measurement subject views the mirror from a position at a predetermined distance and angle from the mirror. The thermometer according to claim 1, wherein the thermometer has a positional relationship corresponding to Furthermore,
A distance measuring unit for measuring the distance to the measurement subject;
An operation mode control unit that stops the light emitting operation of the light emitting unit when it is determined that the measured person does not exist within the measurable range of the temperature measuring sensor based on the distance data obtained from the distance measuring unit; The thermometer according to claim 1 or 2.   When the operation mode control unit determines that the person to be measured exists within the measurable range of the temperature measurement sensor from the distance data obtained from the distance measurement unit from a state where the light emission operation of the light emission unit is stopped. The thermometer according to claim 3, wherein the light emitting operation of the light emitting unit is started. Furthermore,
Based on the temperature data obtained from the temperature data calculation unit, an operation mode control unit that stops the light emission operation of the light emitting unit when the measured person determines that the person is not within the measurable range of the temperature measurement sensor; The thermometer according to claim 1 or 2, comprising.   The operation mode control unit is configured to stop the light emission operation of the light emitting unit, and when the measured person exists within the measurable range of the temperature measurement sensor from the temperature data obtained from the temperature data calculation unit. The thermometer according to claim 5, wherein when judged, the light emitting operation of the light emitting unit is started.   The display unit emits light in a first display color when the temperature data is equal to or greater than a predetermined threshold value, and emits light in a second display color when the temperature data is less than the threshold value. The thermometer according to 3 or 4 or 5 or 6. A mirror that can reflect the forehead of the person being measured,
A light-emitting unit that is provided on the mirror and irradiates the forehead of the person to be measured;
A temperature measuring sensor provided adjacent to the light emitting part of the mirror and measuring a surface temperature of the forehead of the person to be measured;
A temperature data calculation unit that calculates the body surface temperature or body temperature of the measurement subject based on a signal obtained from the temperature measurement sensor and outputs temperature data; and
A thermometer comprising a voice transmission unit that reads out the temperature data by voice synthesis.

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