JPH0342533A - electronic temperature measuring device - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to an electronic temperature measuring device that displays a temperature detected by a temperature sensor.

[Prior art and its problems]

An example of an electronic temperature measuring device is an electronic wristwatch equipped with a temperature measuring function. With this type of device, if the temperature detected by the temperature sensor installed on the watch itself is displayed as the ambient temperature at that time, then when the watch is being carried around (for example, when the watch is worn on the wrist), the temperature sensor It had the disadvantage that it was not able to display the correct ambient temperature because it was affected by body temperature.

Therefore, as a solution to this problem,
Japanese Patent No. 117429 proposes an electronic temperature measuring device that can selectively display the temperature measured by a temperature sensor and a corrected temperature that corrects temperature errors due to the influence of body temperature.

However, in the above temperature measuring device, if the temperature detected by the temperature sensor is displayed as is when the non-portable state is selected, and the corrected temperature is displayed when the portable state is selected, A problem arises in that the correct ambient temperature cannot be detected immediately after changing the state selection.

In other words, for example, when switching from a non-portable state to a mobile state, the temperature sensor is not yet affected by body temperature immediately after the switch, and the corrected temperature obtained by correcting the temperature detected by the temperature sensor is the actual ambient temperature. The temperature will be different from that. In addition, when switching from a mobile state to a non-mobile state, the temperature near the temperature sensor remains affected by body temperature, so if the measured temperature is displayed as it is, the displayed temperature may be different from the actual ambient temperature. Become.

As described above, the conventional electronic temperature measuring device has a problem in that when the selection between the portable state and the non-portable state is changed, the correct ambient temperature at that time cannot be detected.

In addition, electronic temperature measurement devices include those that store measured temperatures at regular intervals in a memory in order to see temperature changes within a measurement period, or those that store the maximum and minimum temperatures of those measured temperatures. There are some that sound an alarm when the target temperature is reached.

These devices have ii! non-portable and mobile states. If the temperature is measured when the temperature is changed, there is a problem in that incorrect temperature data is stored in the memory for the reasons described above.

[Purpose of the invention]

An object of the present invention is to provide an electronic temperature ff1l+ constant device that does not capture incorrect temperature data even when the selection of whether or not to correct the temperature detected by a temperature sensor is changed. .

[Key points of the invention]

According to the present invention, when the selection means changes the presence or absence of temperature correction in the temperature correction means, the operation of the temperature detection means or the control means that performs a predetermined process based on temperature data is prohibited for a certain period of time, and incorrect temperature data is detected. This is to prevent the incorporation of

〔Example〕

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a circuit diagram of an electronic timepiece with a temperature measurement function according to an embodiment of the present invention.

In the figure, an oscillation circuit 1 is a circuit that generates a reference clock signal with a constant period, and outputs the generated signal to a frequency dividing circuit 2. The frequency dividing circuit 2 divides the frequency of the reference clock signal, creates a signal of, for example, 16 Hz, and outputs the signal to the counter circuit 3.

The clock counting circuit 3 counts the 16 Hz signal to measure the current time and date, obtains time data consisting of the current time and date data, outputs the time data to the CPU 4, and clocks the current time and date. pulse signal (I P/M
') is output to the CPU 4 and the AND gate 6.

The CPU 4 is a central processing unit that controls the entire circuit, and updates the time based on the time data from the counting circuit 3, and also updates the temperature sensor 9 and A/M sensor, which will be described later, in accordance with the I P/M signal. The D conversion circuit 10 is driven.

The flip-flop 5 is a circuit that controls the start and stop of timing in a timer 7, which will be described later, and is set by a signal output from the CPU 4 when switching between portable mode and non-portable mode. When the flip-flop 5 is set, the AND gate 6 is opened and the I P/M signal from the counting circuit 3 is applied to the timer 7.

The timer 7 is a timer that counts the IP/signal for 25 minutes, and outputs a count-up signal to the CPU 4 after counting 25 minutes. Further, a signal for setting the flip-flop 5 is given to the timer 7 as a clear signal, and the count value of the timer 7 is cleared by this clear signal.

Although not shown, the switch section 8 includes keys for changing the SM flat key engraving for switching between portable mode and non-portable mode, and outputs operation signals of these keys to the CPU 4.

The temperature sensor 9 is a sensor that detects the ambient temperature and is built into the watch body. The analog temperature signal detected by the temperature sensor 9 is converted into a digital temperature signal in the A/D conversion circuit 10 and output to the CPU 4. Furthermore, these temperature sensor 9 and A/D conversion circuit 10 measure the ambient temperature based on a drive signal given from the CPU 4 every minute.

When switching between the portable mode (with the watch on the wrist) and the non-portable mode during temperature measurement, the CPU 4 sets the flip-flop 5 and causes the timer 7 to start counting. While performing this, the operations of the temperature sensor 9 and A/D conversion circuit 10 are stopped. As a result, the measurement of the ambient temperature is stopped for a certain period of time (25 minutes in this embodiment) after the mode is switched.

The RAM II is a memory that is written to and read from by the CPU 4, and has a memory area that stores various flag registers and measured temperature data.

FIG. 2 is a diagram showing the configuration of the RAM II.

As shown in the figure, RAMII includes a register T for storing the currently measured temperature, a register S for storing the previously measured temperature, a register AT for storing the preset alarm temperature, and a register AT for storing the previously measured temperature. A register TMAX stores the maximum temperature among the temperatures, a register THIN stores the minimum temperature, a mode register M stores a value indicating whether the mode is mobile or non-portable, and switching between mobile mode and non-portable mode is performed. A flag FT is provided which is set to "1" after a certain period of time.

For example, the mode register M is set to "0" in the non-portable mode, and "1j" is set in the portable mode.Furthermore, the flag FT is normally set to "0", and in the portable mode When the mode is switched from to non-portable mode or vice versa, rl is set in the flag door.

Then, when 25 minutes have passed after the mode switching and a count-up signal is output from the timer 7, the flag Fr is set to "0" again and temperature measurement every minute is started.

In addition, RAMII has 24 registers N0 to N that store temperature data obtained from temperature measurements performed every hour on the hour.
23 are provided. The first register number has 0 AM.
The ambient temperature measured at the hour is recorded, and the ambient temperature at every hour is stored in registers N+, Nz, . . . N23 in order.

Returning to FIG. 1, the buzzer 12 is a circuit that sounds an alarm sound based on a signal from the CPU 4. For example, when the measured temperature reaches the alarm temperature of the register AT, the buzzer 12 sounds an alarm sound.

The display drive circuit 13 is a circuit that converts special rule data and temperature data output from the CPU 4 into signals that drive the display elements of the display section 14.

The display section 14 consists of two segment displays: a temperature display section 14a and a time display section 14b.
4a displays the ambient temperature measured every minute, and the lower time display section 14b displays the current time.

Further, a triangular display 14c is provided on the left side of the segment display 14b to indicate that temperature measurement is not in progress, and this display 14c lights up for a certain period of time after the mode is switched, informing the user that the current temperature measurement is canceled. Let them know what is happening.

Next, the operation of the embodiment configured as above will be explained.

FIG. 3 is a flowchart illustrating the overall processing of the embodiment.

First, in step St in FIG. 3, it is determined whether any switch has been operated.

When any switch is operated, the next switch process of step S2 is executed.

FIG. 4 is a flowchart illustrating the contents of this switch processing, and the following description will be made with reference to this flowchart.

In step ST1 in FIG. 4, it is first determined whether or not the SN key was operated.

If it is the SN key that was operated, the next step ST2
At this point, it is determined whether the value of mode register M is "0".

If M=O, that is, when the 3M key is operated in the non-portable mode, the process proceeds to step ST3, where the mode register M is set to "1" and the mode is switched to the mobile mode.

On the other hand, if M=1, that is, 3 in mobile mode.
When the M key is operated, the process proceeds to step ST4, where the mode register M is set to "O" and the mode is switched to the non-portable mode.

After step ST3 or ST4, step ST
5, the flip-flop 5 shown in FIG. 1 is set and the timer 7 is started to clear. Furthermore, in step ST6, rl is set for 7991 copies.

By setting rl in the flag Fr, it is stored that switching between the portable mode and the non-portable mode has been performed.

In the determination at step STI, if the operated key is not the 89 key, it means that another key was operated for time adjustment or the like, and the process advances to step ST7 to execute the process of the corresponding key.

Returning to FIG. 3, after the switch processing, the process proceeds to step S3, where it is determined whether the flag F is "0".

When F,=O, that is, when mode switching is not performed, the process advances to step S4, and the counting circuit 3
It is determined whether the IP/M signal from the IP/M signal is input.

When the I P/M signal is input and the measurement timing is every minute, the temperature sensor 9 and the A/M signal are input in the next step S5.
The D conversion circuit 10 is driven.

Then, in the next step S6, the temperature data measured at that time is stored in the register r of RAMII.

Thereafter, in step S7, it is determined whether the value of the mode register M is 'IJ'.

When in portable mode with M=1, the measured ambient temperature T is multiplied by a coefficient A, a constant B is further added to perform temperature correction, and the corrected temperature data is stored in a register T.
Proceed to the next step S9.

If it is the non-portable mode where M=0, the process proceeds to step S9 without performing temperature correction.

Here, the temperature data measured in the handheld mode is multiplied by a coefficient A and a constant B is added because the temperature sensor installed on the watch body is affected by body temperature when the watch is worn on the wrist. This is to correct the fact that the detected temperature of No. 9 is higher or lower than the actual ambient temperature. Furthermore, since the coefficient A and the constant B at this time are constant values determined by the material of the watch case, values corresponding to the material of the watch case may be stored in the CPU 4 in advance.

In step S9, it is determined whether the current time is on the hour. If it is the hour, the process proceeds to the next step SIO, and the temperature data T obtained as described above is stored in the register N11 corresponding to the time at that time.

Thereafter, in step Sll, it is determined whether the temperature data T measured this time is higher than the highest temperature T (x) up to that point.

If T>TMAX, in the next step S12, the current temperature data T is stored in the register TMAX for storing the maximum temperature, and the process proceeds to the next step S13, and if T≦TMAX, the process directly proceeds to step S13.

In step S13, it is determined whether the temperature data T measured this time is lower than the lowest temperature TMIN up to that point.

As a result, if T < THIN, the next step S1
4, the current temperature data T is stored in the register TWIN that stores the lowest temperature, and the process proceeds to the next step S15.
If ≧T, . . . , the process directly advances to step S15.

In step 515, it is determined whether alarm temperature data AT is included between the previous measured temperature data S and the current measured temperature data T.

When the alarm temperature AT falls between the previous temperature data S and the current temperature data T, the ambient temperature has reached the alarm temperature, and in step 316, the buzzer 12 in FIG. 1 is activated. Notify the alarm sound.

If the alarm temperature AT does not fall between the previous temperature data S and the current temperature data T, this means that the measured temperature has not reached the alarm temperature AT, and the process directly proceeds to step 317.

In step S17, the current temperature data T is stored in the register S in preparation for the next measurement, and the process proceeds to the next display process.

On the other hand, in determining the flag FT in step S3,
If it is 1, it means that switching between the portable mode and the non-portable mode has been performed, so the process proceeds to step 319, and it is determined whether or not a 25-minute time-up signal has been output from the timer 7.

If the time-up signal has not been output, the process advances to step S20 to determine whether the current time is on the hour.

When the current time is on the hour, it is time to store the measured temperature data in the register NN corresponding to that time, but when FT=1, temperature measurement has been stopped, so in step S21, the temperature data is not stored. The measurement code is stored in the register NH, and the process then proceeds to display processing in step 31B.

Further, in the determination at step S19, when a 25-minute time-up signal from the timer 7 is detected, the process proceeds to step S22, where the flip-flop 5 is reset and the timer 7 ends the time measurement. Furthermore, since 25 minutes have passed since the mode switching, in the next step S23, the flag F is set to "0" and temperature measurement is started.

In other words, a certain period of time (2
5 minutes), the ambient temperature is not detected, and the temperature data is not loaded into the memory during that time.

As a result, when switching between non-portable mode and mobile mode, the measured temperature or the corrected temperature obtained by correcting the measured temperature may be significantly different from the actual ambient temperature. Also, it is possible to prevent erroneous temperature data from being stored in the register number.

FIG. 5 is a flowchart illustrating the content of the display process.

In step ST8 of FIG. 5, the current time data from the counting circuit 3 is output to the display drive circuit 13, and the time is displayed on the time display section 14b.

Next, in step ST9, the temperature data in the register T is similarly displayed on the temperature display section 14a.

Next, in step 5TIO, it is determined whether the flag Ft is "1". If Ft=O, the process ends, and if Fy=1, the process proceeds to step 5T11, where the display section 1
The non-measurement display 14c of No. 4 is turned on to indicate that the measurement of the ambient temperature has been stopped.

As a result, switching between portable mode and non-portable mode is performed, and while flag F is set, temperature data is not loaded into register NH, and the temperature data is stored in register T before mode switching. The temperature data is
The ambient temperature at that time is displayed on the display unit 14. In addition, at this time, the non-measurement display body 14 is lit and displayed on the display unit 14.
c indicates that temperature measurement is currently suspended.

FIG. 6 shows an example of the display when the mode is switched by operating the S9 key.

As shown in Figure 6 (]), the ambient temperature is r25.6°.
If you operate the S4 key to switch the mode with "C" displayed, temperature measurement will be stopped for a certain period of time as described above, and the display section 14 will display the register T at that time as shown in (2) in the same figure. The non-measurement display 14c lights up and displays the temperature "25.degree. 6.degree. C." stored therein.

In this state, when 25 minutes have passed since the mode switching, temperature measurement is started again, the non-measurement display 14c goes off as shown in FIG. temperature is displayed.

As described above, according to the above embodiment, in a temperature measuring device that can switch between portable mode and non-portable mode, by prohibiting temperature measurement for a certain period of time after mode switching, it is possible to prevent incorrect temperature data from being loaded into the memory. can be prevented.

In the above embodiment, measurement with the temperature sensor is prohibited for a certain period of time after the mode is switched, and the ambient temperature measured just before is displayed during that time. It is also possible to prohibit only the import of temperature data.

In addition, by displaying on a non-measurement display that the data acquisition has been stopped, it becomes clear that the temperature measured at that time is incorrect, so the temperature data measured during the prohibited period is The temperature may be displayed directly on the temperature display section 14a.

Furthermore, the present invention is applicable not only to the above-mentioned electronic wristwatch with a temperature measurement function, but also to other temperature measurement devices that can selectively display at least the measured temperature and a corrected tilt temperature.

〔Effect of the invention〕

According to the present invention, even when the selection is changed from with correction to no correction or from no correction to with correction, incorrect temperature data is displayed or various processes are performed based on the incorrect temperature data. This can be prevented.

[Brief explanation of drawings]

FIG. 1 is a circuit configuration diagram of an electronic timepiece with a temperature measurement function according to an embodiment of the present invention. FIG. 2 is a diagram of the constituent countries of the RAM shown in FIG. 1. FIGS. FIG. 6 is a flowchart illustrating an example operation. FIG. 6 is a diagram showing an example of a display state.・Cpu.・Flip-flop, ・Timer, ・Switch unit, ・Temperature sensor.

Claims (1)

[Scope of Claims] Temperature detection means; Temperature correction means for correcting measured temperature data obtained by the temperature detection stage based on preset correction data to obtain corrected temperature data; a selection means for selecting whether or not to perform temperature correction; a control means for performing a predetermined process based on the measurement data or the corrected temperature data according to a selection result of the selection means; and a control means for selecting whether or not to perform correction by the selection means. An electronic temperature measuring device comprising: inhibiting means for inhibiting the operation of the temperature detecting means or the controlling means for a certain period of time when the selection is changed.