JPS60151527A - Electronic clinical thermometer - Google Patents

Abstract

PURPOSE:To allow a buzzer circuit to annunciate a comparison result under the control of a timer circuit by providing a comparing circuit which compares count results, the timer circuit which indicates counted elapsed time, and the buzzer circuit which annunciates the comparison result. CONSTITUTION:A temperature counter 203 counts output pulses 211 temperature sensing part 100 transferred through a gate 202. A memory part 24 is stored with the output signal 214 of a temperature counter 203 and also stored with, for example, a maximum value of temperature which varies momently at any time. A display part 400 displays the output signal 216 of a decoder/driver 205 optically and numerically on, for example, liquid-crystal elements. A comparing part 206 compares the output signal 214 of the counter 203 with the temperature data stored in the memory 204 to detect a rise or fall in temperature. A driving part 208 drives a buzzer 500 and is controlled by the comparing part 206, reference part 201, and timer 207. Consequently, the real bodily temperature that a user requires is confirmed by sound without looking at the display result repeatedly, and the effect in practical use is large.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an electronic thermometer that uses a temperature sensing element to capture body temperature as a physical quantity, such as a change in resistance or a change in frequency, that can be counted by an electronic circuit and displays it digitally.

[Background of the invention]

In recent years, electronic thermometers have become smaller and more popular for general household use, and their effectiveness is increasing. It is quite cumbersome to take a reading or take out the thermometer and read it after a certain amount of time has elapsed, and it is extremely difficult to take the correct temperature.

[Prior art and problems]

Therefore, when the temperature sensing element and the body temperature reach temperature equilibrium, notifications such as emitting a buzzer sound or flashing a displayed value have been considered. However, in reality, even if temperature equilibrium is detected and reported, there are many cases where the true body temperature has not actually been reached, and this has caused problems. This situation will be explained below. Figure 1 is a block diagram of the configuration of a conventional electronic thermometer.
00 is the temperature sensing part, 200 is the control IC 1300, 4
00 is a display section, and 500 is a part of a buzzer.

The temperature sensing section 100 is, for example, an element whose resistance value changes depending on the temperature or an IC oscillator whose frequency changes depending on the temperature, and electronically captures body temperature.

The control rc 200 counts electronic quantities from the temperature sensing section 100, converts them into digital data, compares the counting results, and counts elapsed time.

The power source gOo is, for example, a button battery, which provides a driving source.

The display section 400 is, for example, a liquid crystal, and optically converts an electronic numerical signal from the control IC 200 to display body temperature numerically.

The buzzer part 500 is, for example, a small sounding body, and the control IC 2
00 electronic signal.

Figures 2 and 3 show the time course of the division results. Figure 2 is an example of a relatively stable measurement in which the temperature sensing part is attached to the living body, for example, after 6 minutes. The next body temperature value l> and the body temperature value C which is y equal to body temperature E according to the displayed value or buzzer sound.
It is a system that provides information that users want to know.

Figure 3 shows an example of a case where the adhesion between raw shame and temperature sensing > 21S is poor at the beginning of measurement, or temporary fluctuations in the living body occur due to measurement, and the displayed value or buzzer sound is Therefore, the user is notified of body temperature values A, B, etc., and the result is different from the information that the user wants to know.

[Object of the present invention] The object of the present invention is to eliminate such drawbacks and to provide an electronic thermometer that uses an electronic sound to notify close to the true body temperature (temperature equilibrium).

[Structure of the invention]

Electronic thermometers use a thermosensing element to capture body temperature as a physical quantity that can be counted by an electronic circuit and display it digitally, and a buzzer notifies the thermal balance between the body temperature and the thermosensor. An electronic thermometer is characterized in that it is equipped with a timer circuit that indicates the elapsed time and a buzzer circuit that notifies the comparison result, and the buzzer circuit is controlled and notified by the timer circuit.Details of embodiments of the invention are described below based on the drawings. Give a detailed explanation.

[Embodiments of the invention]

FIG. 4 shows an embodiment of the present invention, where 201 is a reference part, 2
02 is a gate section, 203 is a temperature counter section, 204 is a memory section, 205 is a decoder/driver section, 206 is a comparison section, 207 is a timer section, and 208 is a drive section.

The reference section 201 is a time reference such as an oscillation frequency generated by a crystal oscillator, and serves as a reference for various signals such as a body temperature measurement cycle, a display drive signal, a buzzer drive signal, and a timer signal.

The gate section 202 controls the pulse signal 211 of the temperature sensing section 100 with the output signal 212 of the reference section 201, and when the output signal 212 is at the l(level), the output pulse signal 211 of the temperature sensing section 100 is sent to the temperature counter. Forward.

The temperature counter 206 counts the output pulse signal 211 of the temperature sensing section 100 transferred via the gate section 202. It goes without saying that the temperature counter 203 has an addition or subtraction counter configuration depending on the characteristics of the temperature sensing section 1dO, that is, the resistance, frequency, or other change amount with respect to temperature is positive or negative.

The memory part 204 receives the output signal 21 of the temperature counter 206.
4, and for example, it constantly stores the maximum value of the temperature, which changes from moment to moment.

The decoder/driver section 205 converts the output signal 215 of the memory section 204 into a numerical signal, and the output signal 216 is transferred to the display section 400.

The display section 400 is, for example, a liquid crystal element, and displays the output signal 216 of the decoder/driver part 205 in an optical numerical value.

The comparison section 206 receives the output signal 214 of the temperature counter section 203.
, that is, the latest temperature data Ti and memory Ma 2 o
4, i' t = 'I'' t n ie temperature equilibrium, Ti)Ttn ie warm rise, T 1. (1
"in", that is, it detects a temperature drop.

The timer section 207 counts the output signal 218 of the reference section 201 to indicate the passage of time, and starts time measurement when the external switch of the body temperature indicator 1 is turned on or when the temperature data Tt reaches a specific temperature.

Here, the output signal 213 of a part of the timer is transferred to the drive unit, but it goes without saying that this part of the timer is also used for a function such as automatically turning off the power for body temperature reduction after a certain period of time. .

The drive unit 208 drives the buzzer part 500,
It is controlled by a comparison section 206, a reference section 201, and a timer section 207.

FIG. 5(a) shows an example of the configuration of the drive section 208, and FIG.
1)) indicates a time chart, and 2801.
2814 is AN I) gate, 2802.2803.
2804 is 1) type 1-'/' F, 2805, -28
07.2808 is N A N I) gate, 2806.
2811 is the INV gate, 2809.2810.281
5 is NOR gate, 2812.2816 is ゛l゛lI
・7/F, 2816 is B LJ FF gate, 2817
is the ort gate.

The human input signal 211a is the matching output of the comparing section, and the input signal 211
b is the mismatch output of the comparison section, input signal 212a is the start output of the reference section, 2121), 212c, 212d is the clock output of the reference section, 213a is the output of a part of the timer, 21
4 is an output signal of the driving section.

When the input 212a occurs, the circuit enters an initial state, and in this embodiment, the input 212a is a power-on detection pulse. Since the initial state is also created by the input 211b, that is, the non-coincidence output of the comparator, in this embodiment, it is when the coincidence output of the comparator occurs continuously, that is, when temperature equilibrium continues for a certain period of time.

Input 216a is a timer output, and if it is logic 1, the shift register consisting of the D-type F/F 2802.2803.28o4 is logic 1, and output 214 maintains logic 1-1.

Input 211a is a coincidence signal generated every time temperature equilibrium is reached;
When the input 213a becomes logic 1, it is transferred to the D-type F'/F 2802 through the -A N +) gate 2801.Here, 1) the type 1.
3. In order for all Q outputs of 2804 to become logic 1f,
Input 211a is logic 1 for 3 clocks of input 212b
, that is, it matches three times in a row, and the signal 213a from the timer part is logic I (in case NΔN I) gate 280
The output of 5 is logic I, which is a NAND game) 2807
．． 1 composed of 2808, ts type 11゛/F inverted,
N A N I) The output of the gate 2808 is logical, and the clock inputs 212c and 212d are the NOR gate 28.
15, output 21 via B U F F gate 2816
When the output of the NAND gate 2808 is logic I7, the drive waveform shown in FIG.
The clock 212C is connected to the i” type F through the t gate 2810.
/F2812, and when the clock 212C is transferred with 3 pulses, the Q of T type F/F2812.2816
The output becomes logic 11, and the output of the ANI gate 2814 becomes a logic 1-1, which is transferred to the NOR gate 2809.

When the input of the NOR gate 2809 becomes logic 11, the output becomes I, and the l (inverted to S type F/F and N A N +) gate 2 composed of NAND gates 2807 and 2808
The output of 808 becomes lI, and this state is maintained. F
Then, the output 214 is output for three pulses of the clock 212C as shown in FIG. 5(1), and the operation is completed. In addition, the number of times the coincidence signal occurs consecutively, and the output 2
It goes without saying that the number of pulses generated in step 14 is not limited to three and can be set arbitrarily7. [Effects of the Invention] As described above, according to the present invention, in body temperature measurement,
It prevents false alarms due to temporary temperature equilibrium that occurs in the initial stage, and allows users to confirm their true body temperature as a sound without having to repeatedly look at the displayed results (or watch the elapsed time using a wristwatch, etc.). The effect is extremely large.

[Brief explanation of drawings]

Figure 1 is a schematic block diagram of the configuration of a conventional electronic thermometer;
3 is a diagram showing the time course of body temperature measurement, FIG. 4 is a block diagram of the configuration of the present invention, and FIG. Figure (Al is the circuit diagram, Figure 5?hl is the time chart, -1.201 Reference section, 202...Gate section, 203.
Temperature counter part, 204-・Part of memory, 205...Part of Tecoder driver, 206...
Comparison section, 207 --- Timer part, 208 - Drive section. Figure 1 Figure 2 Figure 3 1:, I4! 1) t) ri〉 Figure 4 27

Claims (2)

[Claims] (1) In an electronic thermometer that uses a thermosensing element to capture and digitally display body temperature as a physical quantity that can be counted by an electronic circuit, and uses a buzzer to notify the thermal balance between body temperature and the thermosensor, there is a comparison circuit that compares and detects the counting results. , an electronic body temperature sensor comprising a tie foot circuit for counting elapsed time and a buzzer circuit for notifying a comparison result, the buzzer circuit being controlled by a timer circuit and for notifying the user. (2) The electronic body temperature side according to claim 1, wherein the timer circuit is started by an external switch signal or a signal passing through a set temperature.