JPH0326335B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an electronic temperature measuring device that digitally converts and displays a temperature detected by a temperature sensor.

Recently, electronic wristwatches have become more multifunctional, and electronic wristwatches equipped with temperature measuring devices are being considered. This type of electronic wristwatch converts the temperature detected by the temperature sensor into a digital value and displays it. However, since the displayed temperature is the temperature sensitive to the temperature sensor itself, when the wristwatch is not being carried, measure temperature,
However, when you are carrying it (wearing it on your arm), it is affected by the temperature of your arm (body temperature).
The sensitive temperature of the temperature sensor did not reach the ambient temperature, making it impossible to accurately measure the ambient temperature.

This invention was made in view of the above-mentioned circumstances, and its purpose is to provide an electronic temperature measuring device that accurately measures and displays the outside temperature even if it is affected by body temperature when carried. It's about doing. ) Hereinafter, this invention will be specifically described based on an embodiment shown in the drawings. This embodiment shows a case where the present invention is applied to an electronic wristwatch equipped with a temperature measuring device.
In FIG. 1, reference numeral 1 indicates a display device provided on the front side of the electronic wristwatch. At the bottom of this display device 1, there is a first numerical display 2 that digitally displays time information and temperature setting temperature of a temperature alarm. is arranged,
Further, in the middle section, a character display 3 for displaying day of the week information and display mode information in alphabetical characters and a second numerical display 4 for digitally displaying date information and measured temperature information are arranged, and furthermore, in the upper section, An analog display 5 for displaying measured temperature information in analog form is disposed in the section. This analog display body 5 consists of two triangular display elements on the left and right and 40 display elements arranged in a straight line, and above the 40 display elements there is a temperature display corresponding to every 5 display elements. scale,
0, 5,...35, 40 are fixedly displayed, the left triangular display element above displays temperatures below 0°C, the right triangular display element displays temperatures above 41°C, and 40 display elements display temperatures below 0°C. It displays temperatures from 1°C to 40°C in units of 1°C. Further, a temperature sensor 6 composed of a thermistor or the like is provided on the front surface of the electronic wristwatch.

Next, the circuit configuration of this electronic wristwatch will be explained with reference to FIGS. 2 to 4. The reference clock signal outputted from the soot oscillation circuit 8 constituting the clock circuit 7 is frequency-divided into a 1-second signal (1 Hz signal) by a frequency dividing circuit 9, and sent to a counter circuit 10 for counting. The counting circuit 10 counts and outputs hour, minute, and second time information, day of the week information, and date information of the month and day based on the 1-second signal, and outputs it to the display device 1 via the display switching control section 11. Sent.

Further, the switch section 12 includes manual switches S ₁ to S ₄ provided outside the watch case, and a manual switch S _a provided inside the watch case. Switch _S1 is a switch for measuring and canceling the temperature at that time when operated, switch _S2 is a mode changeover switch for switching between temperature alarm setting mode, temperature measurement mode, and time mode, switch _S3 , _S4 is used to set a desired alarm temperature in temperature alarm setting mode, switch _S3 is a switch that increases the alarm temperature by +1℃ each time it is operated, and switch _S4 is a switch that increases the alarm temperature by +1℃ each time it is operated. A switch that decreases the alarm temperature by -1℃ each time it is operated, and a switch S _a that specifies what material the watch case is made of; for example, a metal case, a plastic case, or an insert. This is a switch that specifies one of the cases. The outputs of these switches S ₁ to S ₄ and S _a are respectively given to the switch control section 13 .

The switch control section 13 outputs various control signals according to the output of the switch section 12, and outputs a display switching command to the display switching circuit 11 and signals a to g to the temperature measuring device 14. signal b
is applied to the OR gate 15 to which the 1p (pulse)/1M (minute) signal output from the counting circuit 10 is input. The output of this OR gate 15 is a temperature sensor 6, an A/D (analog/digital) conversion circuit 16 that converts the temperature detected by this temperature sensor 6 into a digital value, and a temperature converted by this A/D conversion circuit 16. are respectively given to a temperature correction circuit 17 that corrects based on the influence of the human body,
These are operation commands for operating each circuit. Also,
Signal a is a signal that commands the material of the watch case.
It is applied to the temperature correction circuit 17. Note that since thermal conductivity differs depending on the material of the watch case, the influence of body temperature on the temperature sensor 6 differs depending on the material of the watch case. Therefore, the temperature correction circuit 1
7 corrects the temperature converted by the A/D conversion circuit 16 according to the material of the watch case. Further, the signals c to g are given to the temperature storage circuit 18, and the signals c to f are signals for setting an alarm temperature in the temperature storage circuit 18. Note that the temperature storage circuit 18 is configured to be able to set two types of alarm temperatures. Further, the signal g is the temperature memory circuit 1
This is a signal for selectively outputting two types of alarm temperatures set at 8 to the display switching control section 11.

The alarm temperature set in the temperature storage circuit 18 is sent out in accordance with the output of the OR gate 15, and given to each temperature comparison circuit 19 into which the corrected temperature is input from the temperature correction circuit 17. This temperature comparison circuit 19 compares the magnitude of both input temperature data and detects whether the corrected temperature has reached the alarm temperature. When the corrected temperature reaches the alarm temperature, it outputs the alarm temperature. The alarm device 20 generates an alarm sound.

The temperature converted by the A/D conversion circuit 16 is read into the latch 21, and the temperature corrected by the temperature correction circuit 17 is read into the latch 22.
The signals are sent to the display switching circuit 11, respectively.

Next, the switch control section 13 and display switching circuit 11 will be explained in detail with reference to FIG. The switch control unit 12 includes corresponding switches S ₁ to S ₄ , S _a
One-shot circuits 23 to 27 are provided, respectively, which output pulse signals when the operation signals of 1 and 2 are applied. The pulse signal output from the one-shot circuit 23 is applied to the T input terminal of the trigger flip-flop 28 to invert its output. The Q and output of this flip-flop 28 are applied to a decoder 29, respectively. Further, the pulse signal output from the one-shot circuit 24 is applied to a ternary counter 30, and increments its contents by +1. The ternary counter 30 is a one-shot circuit 24.
Depending on the output, the content changes as "0", "1", "2", "0", etc., and the content changes as "0", "1", "2" corresponds to the clock mode, temperature measurement mode, and temperature alarm setting mode, respectively, and each bit output is given to the decoder 29, respectively. Furthermore, the pulse signals output from the one shot circuits 25 and 26 are given to a decoder 29, and the signal a output from the one shot circuit 27 is sent out from the switch control section 13.

The decoder 29 is composed of a decoder section 29-1 having an AND gate function, and decoder sections 29-2 and 29-3 having an OR gate function, and outputs decoded output from lines _l1 to _l13 according to the combination of input signals. Send out. The decoder output from line _l1 is given to a one-shot circuit 31,
The one shot circuit 31 outputs the signal b.
The decoded outputs from lines _l2 to _l8 are display switching commands output to the display switching control section 11. The decoded outputs from lines l ₉ to _{l 13} are signals c to g that are output to temperature measuring device 14 . The display switching control section 11 includes a counting circuit 10.
gate circuits 32 to 34 into which date information, day of the week information, and time information are inputted, and a temperature storage circuit 18.
The gate circuit 35 receives the set temperature from the gate circuit 35, the gate circuits 36 and 37 receive the corrected temperature from the temperature correction circuit 17, and the temperature converted by the A/D conversion circuit 16 (temperature without correction) is input. gate circuits 38 and 39. and,
Gate circuits 32 to 37 are controlled to open and close in response to display switching commands input from lines _l2 to _l7 , and gate circuits 38 and 39 are controlled to open and close in response to display switching commands input from line _l8 . It is becoming more and more common. and gate circuits 32, 37,
The output contents of 38 are sent to the second numerical display 4 and are switched and displayed. The output contents of the gate circuit 33 are sent to the character display and displayed. This character display 3 is given the output of lines l ₅ and l ₈ ,
The character display 3 is in a mode in which, when the output of the line _l5 is given, the content displayed on the second numerical display 4 clearly indicates the temperature converted by the A/D conversion circuit 16, that is, the uncorrected temperature. information (TE-), and mode information (TA) that clearly indicates that the display content of the first numerical display 2 is the set temperature of the temperature storage circuit 18 when the output of line _l8 is given. -) is now displayed. Further, the output of line _l5 is given to the first numerical display 2. In this case, the first numerical display body 2
is designed to display Celsius (°C) in the lower digits. Further, the output contents of the gate circuits 34 and 35 are sent to the first numerical display 2 for switching display, and the output contents of the gate circuits 36 and 39 are sent to the analog display 5 for switching display. Ru.

Next, the temperature correction circuit 17, temperature storage circuit 18, and temperature comparison circuit 19 will be explained in detail with reference to FIG. arithmetic circuit 4 through
1 is input. This arithmetic circuit 41 is adapted to correct the temperature converted by the A/D conversion circuit 16 based on the following equation when the output of the OR gate 15 is given.

T _a = a _o・T + b _o T _a : Outside air temperature, T: Sensor detection temperature when carrying the watch, a _o : Temperature coefficient, b _o : Initial value In other words, the temperature detected by the temperature sensor 6 (sensor temperature) and the outside air temperature The relationship is as shown in FIG. Here, when the watch is not being carried, the sensor temperature changes equivalently in proportion to the outside temperature, as shown in A in Fig. 5, and when the watch is being carried, the sensor temperature changes equivalently in proportion to the outside temperature.
If the watch case is a metal case, B in Figure 5
As shown in Figure 5, the sensor temperature increases from the initial value of 22.5°C when the outside temperature is 0°C, as the outside temperature rises. The sensor temperature starts to rise from an initial value of 25° C. at an outside temperature of 0° C. as the outside temperature rises. In this way, the temperature coefficient a _o and the initial value b _o differ depending on the material of the watch case. In addition, A, B, C in Fig. 5
is consistent with the outside temperature of 34.5℃. As a result, in this embodiment, in order to be compatible with three types of watch cases, the storage section 42 stores the temperature coefficients a ₁ to a ₃ for metal cases, plastic cases, and insert cases, and the initial value b ₁ to _b3 ; and gate circuits 44 to 46, 47 to 49 to which temperature coefficients _a1 to _a3 and initial values _b1 to _b3 outputted from each of the storage units 42 and 43 are input. and a ternary counter 50 that selectively opens and closes these gate circuits 44-49. In this case, the contents of the ternary counter 50 are incremented by +1 by the signal a and change as "0", "1", "2", "0", etc., and each bit outputs Among "0", "1", and "2", the signal "2" opens the gate circuits 44 and 47 to supply the temperature coefficient a ₁ and the initial value b ₁ to the arithmetic circuit 41; 1” is the gate circuit 45,4
8 is opened to supply the temperature coefficient a ₂ and the initial value b ₂ to the arithmetic circuit 41. Further, the signal "0" opens the gate circuits 46 and 49 to supply the temperature coefficient a ₃ and the initial value b ₃ to the arithmetic circuit 41. It's a signal. The calculation result data of the calculation circuit 41 is supplied to the latch 22 and the temperature comparison circuit 19, respectively.

The temperature memory circuit 18 includes a temperature setting counter 5.
1 and 52. This counter 51 is for setting the lower limit temperature of the alarm temperature, and its contents are +
+1 according to the signal d input to the 1 input terminal
At the same time, it is decreased by -1 in accordance with the signal C input to the -1 input terminal. Further, the counter 52 is for setting the upper limit temperature of the alarm temperature, and its contents are incremented by +1 in accordance with the signal f input to the +1 input terminal, and are increased by +1 in accordance with the signal e input to the -1 input terminal. It is designed to be decremented by -1.
The outputs of these counters 51 and 52 are transmitted to the display switching control section 1 through corresponding gate circuits 53 and 54.
1. In this case, the signal g is applied to the gate circuit 53 via the inverter 55 and directly to the gate circuit 54 as a gate opening/closing signal to selectively open and close the gate circuits 53 and 54, respectively. Further, the outputs of the counters 51 and 53 are supplied to the temperature comparison circuit 19 via gate circuits 56 and 57. In this case, the output of the OR gate 15 is given to the gate circuits 56 and 57 as a gate opening/closing signal, thereby opening and closing the gate circuits 56 and 57 simultaneously.

The temperature comparison circuit 19 includes a temperature setting counter 5.
It has comparison circuits 58 and 59 corresponding to 1 and 52. The set temperature is input from the counter 51 to the B input terminal of the comparison circuit 58, and the corrected temperature is input from the arithmetic circuit 41 to the A input terminal. Then, the comparison circuit 58 compares the magnitude of both input temperature information, and as a result, when A>B, that is, the corrected temperature becomes larger than the set temperature, an alarm signal is sent out via the OR gate 60. It is configured as follows. In addition, the comparison circuit 59
The set temperature is inputted from the counter 52 to the C input terminal of , and the corrected temperature is inputted from the arithmetic circuit 41 to the A input terminal. Then, the comparison circuit 59 compares the magnitude of both input temperature information, and as a result, when C>A, that is, the corrected temperature becomes smaller than the set temperature, an alarm signal is sent out via the OR gate 60. It is composed of

Next, the operation of the electronic wristwatch configured as described above will be explained. First, for example, when the assembly of the watch module is completed, the switch S _a is operated depending on the material of the watch case. That is, when the switch S _a is operated, the one-shot circuit 27 outputs a pulse signal a each time the switch S _a is operated, and the pulse signal a is inputted to the ternary counter 50 of the temperature correction circuit 17 . Therefore, the ternary counter 50 is incremented each time the switch S _a is operated. In this case, if the watch case is a metal case, the contents of the ternary counter 50 are set to "0", if it is a plastic case, it is set to "1", and if it is an insert case, it is set to "2". When the contents of the ternary counter 50 are set in accordance with the material of the watch case in this way, the corresponding gate circuits 44 to 49 are opened by each bit output of the ternary counter 50, so that data from the storage units 42 and 43 is Temperature coefficients a ₁ to _{a 3} and initial values b ₁ to b ₃ depending on the material of the watch case are calculated by the calculation circuit 4.
1 is input. This allows the calculation circuit 41 to perform a predetermined calculation based on the input temperature coefficients and initial values among the temperature coefficients aA to _{a 3} and the initial values b ₁ to _{b 3} .

Next, the display states of FIGS. 6A to 6E will be sequentially explained. First, the ternary counter 3 of the switch control unit 13
If the content of 0 is "0", that is, the time mode is set, and the flip-flop 28
When the output of decoder 2 is logical value “1”, decoder 2
A signal of logical value “1” is output from the lines l ₂ , l ₃ , l ₄ , l ₆ of 9, and the gate circuit 3 of the display switching control section 11
2, 33, 34, and 36 are opened respectively. As a result, the date information output from the gate circuit 32 is sent to the second numerical display 4, the day of the week information output from the gate circuit 33 is sent to the character display 3, and the gate circuit The time information output from 34 is sent to the first numerical display 2, and
The corrected temperature information output from the gate circuit 36 is sent to the analog display section 5 and displayed. As a result, the display contents of the display device 1 become as shown in FIG. 6A. In this case, the temperature displayed on the analog display section 5 is changed every minute. In other words, with the 1P/1M signal output from the counting circuit 10,
The temperature sensor 6, A/D conversion circuit 16, and temperature correction circuit 17 automatically operate at one-minute intervals, and after the temperature detected by the temperature sensor 6 is converted into a digital value by the A/D conversion circuit 16, , in the temperature correction circuit 17
Correction is performed according to the correction formula T _a =a _o ·T + b _o , and this corrected temperature is sent to the analog display section 5 via the latch 22 and the display switching control section 11. Therefore, the temperature automatically measured every minute is corrected and displayed on the analog display section 5.

Next, in the watch mode, when switch _S1 is operated once, the output state of flip-flop 28 is inverted by the pulse signal output from one-shot circuit 23, and its Q output becomes a logical value "1", and decoder 29 Signals of logical value "1" are output from lines l ₁ , l ₃ , l ₄ , l ₆ , and l ₇ . As a result, the temperature sensor 6, A/D conversion circuit 16, and temperature correction circuit 17 are operated by the pulse signal b output from the one-shot circuit 31, so that the switch is activated.
When you operate S ₁ , the temperature at that point is measured.
In other words, if switch S ₁ is operated while temperature measurement is performed automatically every minute, the temperature at that point is measured, and manual temperature measurement is possible in contrast to automatic temperature measurement. Become. Therefore, decoder 2
When a signal of logical value "1" is output from the lines l ₃ , l ₄ , l ₆ , l ₇ of 9, the gate circuits 33 , 34 , 36 , 37 of the display switching control section 11 are opened. As a result, the temperature measured at the time of operation of the switch _S1 is corrected by the temperature correction circuit 17 on the second numerical display 4, and this corrected temperature is displayed as date information and a switching display as shown in FIG. 6B. be done. In this state, when switch _S1 is operated one more time, the output state of the flip-flop 28 is reversed and its Q output becomes a logical value "1", so the display state shown in FIG. 6A is returned to. .

Next, in the state shown in Figure 6A, switch _S2 is turned to 1.
When operated once, the content of the ternary counter 31 is incremented to "1" by the pulse signal output from the one shot circuit 24, and the temperature measurement mode is set. In this measurement mode, a signal with a logical value of "1" is output from lines l ₄ and l ₈ of the decoder 29,
Gate circuits 34, 38, 3 of display switching control section 11
9 is opened, and the output signal of line _l8 is applied to the character display body 3. As a result, as shown in FIG. 6C, in addition to the time information being displayed on the first numerical display 2, the uncorrected temperature output from the gate circuit 38 is displayed on the second numerical display 4, and , the uncorrected temperature output from the gate circuit 39 is displayed on the analog display section 5, "TE-" is displayed on the character display 3, and the content displayed on the second numerical display 4 is the uncorrected temperature. Make something clear.

In this measurement mode, when switch _S2 is further operated once, the ternary counter 30 is incremented to "3" by the pulse signal output from the one-shot circuit 24, and enters the temperature alarm setting mode, and the decoder A signal of logical value "1" is output from lines l ₅ , l ₆ , l ₇ of 29, and gate circuits 35 , 36 , 37 of the display switching control section 11 are opened. As a result, the set temperature output from the gate circuit 35 is displayed on the first numerical display 2. In this case, the signal g output from the decoder 29 is
Since the logical value is "0", the temperature storage circuit 18 receives the signal g inverted by the inverter 55.
Then, the gate circuit 53 is opened, and the contents of the temperature setting counter 51 are sent out through the gate circuit 53. Therefore, the set temperature displayed on the first numerical display 2 is the lower limit of the alarm temperature.
Initially, the content of the temperature storage circuit 18 is "0", so the displayed set temperature is "0".
When setting a desired alarm temperature, for example, -5 DEG C., in the temperature storage circuit 51, switch _S4 is operated five times. As a result, the pulse signal outputted from the one-shot circuit 26 is outputted as a signal C from line _l9 of the decoder 29,
− of the temperature setting counter 51 of the temperature storage circuit 18
1 input terminal. For this reason, counter 5
1 is set to a value corresponding to the number of times the switch S ₄ is operated, and this value is displayed on the first numerical display 2.
In this case, in temperature alarm setting mode,
Since the output signal on line _l5 of the decoder 29 is supplied to the first numerical display 2 and the character display 3,
As shown in FIG. 6D, "℃" is displayed in the lower digit of the first numerical display 2, "TA-" is displayed in the character display 3, and the display of the first numerical display 2 is Specify that the content is the alarm setting temperature. As shown in FIG. 6D, if "L" is displayed in the upper digit of the first numerical display 2 by appropriate means, the temperature displayed on the first numerical display 2 can be changed. It can be specified that is the lower limit temperature of the alarm temperature. In the temperature alarm setting mode, the corrected temperatures output from the gate circuits 36 and 37, as shown in FIG.
It is displayed digitally on the numerical display 4, and in analog form on the analog display 5.

Next, when setting the upper limit of the alarm temperature in the temperature alarm setting mode, first,
Operate switch S ₄ once to flip flop 28
inverts the output state of
Then, the lines l ₅ , l ₆ , l ₇ , l ₁₃ of the decoder 29
A signal with a logical value of "1" is output from the gate. Therefore, the gate circuits 35, 36, and 37 are opened, and the signal g output from the line _l13 is input to the temperature storage circuit 18, thereby closing the gate circuit 55 and opening the gate circuit 54. In this state, if you want to set the upper limit of the alarm temperature to, for example, 25°C, set switch S ₃ to 25°C.
Operate twice. As a result, one-shot circuit 2
The pulse signal outputted from 5 is outputted as a signal f from line _l12 of the decoder 29, and is inputted to the +1 input terminal of the temperature setting counter 52 of the temperature storage circuit 18. Therefore, the counter 52 is set with a value corresponding to the number of times the switch _S3 is operated.
As shown in FIG. E, the value set in the counter 52 is displayed on the first numerical display 2. As shown in FIG. 6E, by displaying "H" in the upper digit of the first numerical display 2 by appropriate means, the temperature displayed on the first numerical display 2 can be changed. It is possible to clearly indicate that the temperature is the upper limit temperature of the alarm temperature.

In this state, when the switch _S1 is operated one more time, the output state of the flip-flop 28 is inverted and its output Q becomes a logical value "1", so that the display state shown in FIG. 6D is returned to.

In addition, in the state shown in FIG. 6D, the switch
When _S2 is operated one more time, the contents of the ternary counter 30 become "0", so the state returns to the state shown in FIG. 6A.

Therefore, the counters 51 and 5 of the temperature storage circuit 18
The alarm temperature set to 2 is
Each time an output is given, the corresponding gate circuit 5
6 and 57 to comparison circuits 58 and 59. The comparison circuits 58 and 59 perform a comparison operation with the corrected temperature input from the arithmetic circuit 41 every time the output of the OR gate 15 is given.
Therefore, when the corrected temperature reaches the lower limit temperature of the alarm temperature, for example, -5°C, the comparator circuit 5
An alarm signal is output from the comparator circuit 59, and when the upper limit temperature of the alarm temperature reaches, for example, 25°C, an alarm signal is output from the comparator circuit 59.
An alarm sound is generated from the sound reporting device 20.

In addition, in the above embodiment, temperature correction is performed using a temperature coefficient a _o according to the material of the watch case set in advance.
and I tried to run it according to the initial value b _o , but
Furthermore, since body temperature varies from person to person, multiple temperature coefficients a _o and initial values b _o are set in advance, taking into consideration the general body temperature of humans, and the user selects one set from them. Temperature correction may also be performed. Furthermore,
In the above embodiment, a selection is made from a plurality of temperature coefficients and initial values, but one temperature coefficient and initial value may be fixedly stored in advance.

In addition, although the above embodiment shows the case where it is incorporated into an electronic wristwatch, if it is a portable electronic device,
It is not limited to electronic watches.

Furthermore, in the above embodiment, the outside air temperature is measured, but the water temperature may also be measured.

As explained in detail above, this invention converts the temperature detected by the temperature sensor into a digital value, and then
Since it is configured to correct based on the body temperature of the human body and display this corrected temperature, it is practical that the temperature can be accurately measured and displayed even if the temperature detected by the temperature sensor is affected by body temperature when carried. It has a highly effective effect.

[Brief explanation of the drawing]

The drawings show an embodiment in which the present invention is applied to an electronic wristwatch. FIG. 1 shows the front part of the electronic wristwatch, FIG. 2 shows the circuit configuration of the electronic wristwatch, and FIG. 3 shows the circuit configuration of the electronic wristwatch. The switch control section shown in FIG.
FIG. 4 is a diagram showing details of the display switching control unit and display device. FIG. 4 is a diagram showing details of the temperature correction circuit, temperature storage circuit, and temperature comparison circuit shown in FIG. 1. FIG. 5 is a diagram showing the sensor temperature A diagram showing the relationship between
FIGS. 6A to 6E are diagrams showing display states that are changed in response to operation switches. 1...Display device, 6...Temperature sensor, 16...A/D
Conversion circuit, 17...Temperature correction circuit.

Claims (1)

[Claims] 1. A temperature sensor that detects temperature built into a case body that is attached to a human body, a conversion means that converts the temperature detected by the temperature sensor into digital temperature data T, and a conversion means that converts the temperature detected by the temperature sensor into digital temperature data T. The obtained digital temperature data T and preset correction data _ao ,
Using b _o , Ta = a _o · T + b _o [where a _o is a temperature coefficient depending on the material of the case body, and b _o is an initial value when the outside temperature is 0°. ] An electronic temperature measuring device characterized by comprising a correction means for obtaining corrected temperature data Ta expressed by the following equation, and a display means for displaying the corrected temperature data Ta obtained by the correction means. 2. The electronic temperature measurement according to claim 1, wherein the correction data a _o and b _o used by the correction means are selected from a plurality of preset correction data. Device.