JPS613018A - Electronic clinical thermometer - Google Patents

Abstract

PURPOSE:To enable the correct measurement of a temperature at all times by a constitution wherein an information is made a prescribed time after a measured temperature reaches a prescribed value and a displayed temperature is read as a body temperature. CONSTITUTION:A temperature is converted into an electronic signal by a temperature sensor 11, and then this signal is converted into a digital signal by an A/D converter 12 and taken in CPU13. Based on a program stored in a memory 16, CPU13 takes in the temperature signal from the converter 12 at every sampling time, and when a measured temperature reaches a prescribed time, a timer 15 is started. When a prescribed time passes and timing of the timer 15 comes to the end, a buzzer 18 for urging the reading of a display unit 14 is made to sound. Thus, a correct temperature is measured at all times even when a time at which the temperature sensor is set is varied after a power source switch 19 is turned ON, since a bodily temperature is read a prescribed time after the measured temperature reaches a prescribed time.

Description

DETAILED DESCRIPTION OF THE INVENTION (a) Field of Industrial Application This invention relates to an electronic thermometer that notifies you when a certain period of time has elapsed from a reference time.

(b) Conventional technology In general, electronic thermometers do not measure body temperature immediately by attaching a sensor section to the measurement site, as is known, but rather, the sensor section is attached to the measurement site and the body temperature is measured immediately. As time passes, the temperature increases sequentially until the measurement site and the sensor unit reach thermal equilibrium, and the measurement temperature also increases exponentially.Therefore, from the start of measurement until the measurement temperature reaches a convergence value that can almost be considered as body temperature, Normally, it takes several hours.

Therefore, conventional electronic thermometers notify the user when a certain period of time has passed since the power is turned on until the measured body temperature has almost reached the convergence value, and the person taking the measurement visually watches the display at that time. There is something I did.

(c) Problems to be solved by the invention The above-mentioned conventional electronic thermometer uses the time when the power switch is turned on as a reference time, and then notifies the passage of a certain period of time.
The temperature measured at the time of notification is taken as body temperature.

However, since the time it takes to attach the sensor section to the measurement site varies from when the power is turned on, even if the alarm is to be sent a certain amount of time after the power switch is turned on, the sensor section cannot be attached to the measurement site. The time from when the notification is received varies.

Therefore, the measured temperature at the time of notification varies for each measurement,
There was a problem that accurate measurements could not be made.

That is, if there were variations in the time from turning on the power switch to attaching the sensor part to the measurement site, accurate body temperature measurement could not be achieved.

(d) Means for Solving the Problems As shown in FIG. 1, the electronic thermometer of the present invention includes a temperature measuring section 1, a display 2 for displaying the temperature measured by the temperature measuring section, a predetermined temperature detection means 3 for detecting that the measured temperature has reached a predetermined value; a timer means 4 for measuring a certain period of time in response to the output of the predetermined temperature detection means 3; It is comprised of a notification means 5 for making a notification prompting reading of the display on the display device in response to a time-up.

(E) When the operation temperature measuring operation is started, the temperature measured by the temperature measuring section 1 increases and increases with time. When the measured temperature reaches a predetermined temperature value, it is detected by the predetermined temperature detection means 3,
The timer 4 is activated with that point in time as a reference point, and when the timer 4 times out after a certain period of time has elapsed, the notification means 5 is driven and the temperature displayed on the display 2 at that point is read as the body temperature.

(F) Embodiment FIG. 2 is a block diagram of an electronic thermometer showing one embodiment of the present invention. In the figure, a temperature sensor 11 includes a temperature measuring element such as a thermistor, and converts temperature into an electrical signal. The A/D converter 12 converts the temperature signal from the temperature sensor 11 into a digital signal and inputs it to CPlj]3.

The CPU 3 has a temperature measurement function that captures the temperature signal from the A/D converter 12 at every sampling time, and
Function to display measured temperature on display 14, measured temperature is 3
Function to detect when the temperature reaches 2℃ (predetermined value), indicator 1
4 is provided with a peak hold function to display the highest value of the measured temperature, a function to start the timer 15, etc.

16 is a memory for storing measured temperatures and the like. The reference oscillator 17 inputs a clock signal to the CPtJ 13 and also to the timer 15 for time counting. The buzzer 18 is turned on by a time-up signal from the timer 15. Note that 19 is a power switch.

Next, the operation of the electronic thermometer of the above embodiment will be explained with reference to flowchart 1 shown in FIG.

When the power switch 19 is turned on and operation starts,
First, the registers, flags, etc. of the memory 16 are initialized (step S T ]). Subsequently, temperature measurement is performed (step 5T2). That is, the temperature signal detected by the temperature sensor 11 is sent to the CPU via the A/D converter 12.
13 and stored in the memory 16. Then, it is determined whether the measured temperature value is 32.0°C or higher (step ST3).Here, the power switch 19 is turned on as described above, but the temperature sensor 11 is not attached to the measurement site. Assuming a case, as shown in FIG. 4, the power switch 19 is turned on at time to, and since the temperature sensor 11 has not yet been attached to the measurement site, the measured temperature is also relatively low (room temperature). Once the determination in step ST3 is NO, the process moves to step ST4, and the display 14
"L" is displayed.

This "L" display indicates that actual measurement has not yet begun.

Step ST until the measurement temperature reaches 32.0°C.
2, ST3, and ST4 are repeated at every sample time.

When the temperature sensor [1] is attached to the measurement site, it absorbs body temperature and the measured temperature starts to rise rapidly. When the measured temperature reaches 32.0'C (see t1 in FIG. 4), the determination in step ST3 becomes YES, and the timer 15 is turned on seven times (step 5T5).
receives the clock signal from the reference oscillator 17 and starts time counting. Subsequently, the temperature is measured in the same manner as in step ST2 (step 5T6), and it is further determined whether the measured temperature value is the highest value (step ST7).
. That is, the highest value of the previous measured value and the current measured value are compared, and if the current measured value is large, the current measured value is stored as the highest value, and the display on the display 14 is updated to the current measured value. (Step 5T8). If the current measured value is smaller than the previous highest value, step ST8 is skipped.

Next, it is determined whether “the timer has time amplified or not” (
Step 5T9), if the time is not up, “
If it is determined whether the power switch is off or not (step 5T10), and if measurement is in progress, this determination is of course No, so step S
Return to T6 and perform step ST for each sampling.
The processes from step 6 to step 5T10 are repeated. As a result, body temperature measurement continues, and during the measurement, the maximum temperature is displayed on the display 14.

When time "F" has elapsed since the timer 15 was set, the timer 15 times up, the determination in step ST9 becomes YES, the buzzer 18 is turned on, and a notification sound is output from the buzzer 18 (step 5TII). The measurer who hears the notification sound checks the display on the display 14 and reads the displayed value at that time as the body temperature.

As shown in FIG. 4, if the time T is set so that the temperature value at time t2, after time T has elapsed from time t1, becomes approximately the convergence value, the display at time t2 when the notification sound is emitted. By reading this, it is possible to measure the body temperature almost accurately.

If there is a delay in attaching the temperature sensor 11 after turning on the power switch 19, the temperature curve will move to the right, and if it is attached immediately after turning on the power switch 19, it will shift to the left, but in either case, the temperature curve will reach 32°C. Since the body temperature is read after a certain period of time T has elapsed from the time t1, there is no variation in the measured body temperature.

In the above embodiment, when the timer times up, the buzzer is turned on and a sound is issued to notify the user. However, instead of this, the display may be blinked, or the display may be erased until the time is up. Other different notification means may be used, such as displaying the measured temperature at the amplifier for the first time.

(G) Effect According to this invention, after the measured temperature reaches a predetermined temperature,
After a certain period of time, a notification is sent and the displayed temperature is read as body temperature, so even if there is a problem when attaching the temperature sensor to the measurement site after the power is turned on, accurate body temperature measurements can always be made. .

[Brief explanation of the drawing]

Fig. 1 is a block diagram showing the configuration of the electronic thermometer of the present invention, Fig. 2 is a block diagram of electronic thermometer #1 showing one embodiment of the invention, and Fig. 3 is a block diagram showing the operation of the electronic thermometer. The flowchart, FIG. 4, is a diagram showing the time-temperature characteristics during measurement with the same electronic body temperature needle. 1: Temperature measurement unit, 2: Predetermined temperature detection means, 3: Timer, 4: Display device, 5: Notification means patent applicant Tateishi Electric Co., Ltd. agent
Patent Attorney Shigeru Nakamura Figure 1 Figure 4 Spear 1

Claims (1)

[Claims] (1) A temperature measurement section, a display for displaying the temperature measured by the temperature measurement section, a predetermined temperature detection means for detecting that the measured temperature has reached a predetermined value, and the predetermined temperature An electronic thermometer comprising a timer means for counting a certain period of time in response to the output of the detection means, and a notification means for notifying the user to read the display on the display device in response to the time-up of the timer means.