JPH0738833Y2 - Electronic thermometer - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Industrial field of application) The present invention relates to a measurement-type electronic thermometer.

(Prior Art) Conventionally, electronic thermometers are broadly divided into an equilibrium temperature prediction formula and an actual measurement formula as their measurement systems, and are widely used. Then,
In the case of a measurement type electronic thermometer, the temperature of the temperature sensing element is displayed accurately, but the temperature rising characteristic of the temperature sensing element requires a measurement time of 5 minutes or more depending on the thermal capacity of the measurement site of the human body. There is. On the other hand, in the case of the equilibrium temperature prediction type electronic thermometer, there are many cases where accurate measurement cannot be performed with a specific algorithm due to the difference in personal temperature rise characteristics of the measurer and the degree of pressure contact of the temperature sensitive element to the measurement site. The measurement takes the same time as in the case of the above actual measurement formula.

Therefore, the body temperature of the measurer is forced to be in a rest state not only when there is heat but also during normal temperature measurement during body temperature measurement. This imposes freedom on the measurer, and therefore there is a demand for the development of an actual measurement type electronic clinical thermometer capable of accurately measuring the body temperature in a very short time.

Therefore, conventionally, as a means for solving this problem, a method has been considered in which a heater is provided inside the electronic thermometer to preheat the temperature sensitive element and the measurement is started from a value relatively close to the body temperature. However, this method has a drawback in that when a battery such as silver oxide or lithium is used as a power source, it is not suitable for practical use due to restrictions on power consumption. Furthermore, even if this power supply problem is solved, it will be impossible to measure with a body temperature measurement method that holds the maximum value in the past if it is preheated to a value higher than the body temperature, so it will be more effective than general body temperature of about 32 ° C. There is a problem that the measurement must be started from a low value, and therefore, there is no great expectation for shortening the body temperature measurement time.

(Problems to be solved by the invention) As described above, the conventional measurement type electronic clinical thermometer takes 5 times per measurement time.
Since more than a minute is required, a method has been considered in which a heater is provided inside the electronic thermometer and a battery is used as a power source to preheat the temperature sensitive element to a value relatively close to the body temperature and start the measurement. However, there was a problem in that there was a problem with the power source and preheating, and great expectations could not be obtained for shortening the body temperature measurement time.

The present invention has been made to solve the above problems, and an object thereof is to provide an electronic thermometer capable of measuring body temperature in a short time by a measurement method without predicting the body temperature of a measurer.

[Constitution of device]

(Means for Solving the Problems) In order to solve the above problems, the present invention is an electronic thermometer which is used after being preheated to an average body temperature or higher in advance, which has a temperature sensitive element. A temperature measuring circuit section for detecting the temperature corresponding to the body temperature, a display means for displaying the temperature value output from the temperature measuring circuit section, and a sampling signal for measuring the temperature detected by the temperature measuring circuit section. And a storage unit for storing the temperature value output from the temperature measurement circuit unit for each of the sampling signals output from the time measurement unit and outputting the stored temperature value, and the temperature measurement circuit unit. A ratio for detecting a difference between the temperature value output from the first sampling time and the temperature value measured in the second sampling time before that and stored in the storage means. Comparing circuit part,
When the temperature value measured during the first sampling time is within a predetermined temperature range and the difference between the temperature values detected by the comparison circuit unit falls within a preset first setting range And a notification means for notifying the start of the measurement and further for notifying the end of the measurement of the body temperature when the difference between the temperature values detected by the comparison circuit unit falls within the second set range.

Further, the present invention is characterized in that, after the notification of the start of body temperature measurement by the notification means, the timing means gradually lengthens the cycle of the sampling signal.

(Function) The present invention is a body temperature measuring method in which the conventional actual measurement type electronic thermometer holds the maximum value, whereas the electronic thermometer is preheated to the average body temperature or higher, and then the measurement of the body temperature is started. Since the end is determined by the temperature value for each measurement cycle, that is, the difference between the previous value and the current value, it is possible to measure the temperature after preheating to a temperature above the body temperature, so the temperature value can be measured at the equilibrium temperature in a short time. As a result, when the difference between the previous value and the current value falls within the second set range, the notification means notifies the end of measurement, so that the body temperature can be measured accurately and in a short time.

Further, when the temperature value measured during the first sampling time is within a predetermined temperature range and the difference between the previous value and the current value is within the first setting range, the notification means starts the measurement of the body temperature. By notifying the thermometer,
It is possible to judge whether the thermometer is correctly set in the thermometer's mouth or underarm.

In the electronic thermometer of the present invention, the timekeeping means gradually lengthens the sampling signal cycle, that is, the sampling cycle,
Since the cycle of measuring body temperature gradually increases, the number of measurements that consume a lot of power is reduced, and as described above, the temperature value reaches the equilibrium temperature in a short time, which significantly reduces power consumption. Therefore, the life of the battery can be extended.

(Embodiment) The present invention will be described below based on an embodiment shown in FIGS. 1 to 3.

FIG. 1 is a perspective view showing an example of preheating by using a thermometer temperature raising device in the actual measurement type electronic thermometer of the present invention. First
In the figure, (1) is an actual measurement type electronic thermometer, and (2) is, for example, a thermometer temperature raising device for preheating the above-mentioned actual measurement type electronic thermometer (1) to about 30 to 50 ° C. according to temperature setting. The power source of the temperature raising device is supplied from a household outlet or the like, and is a power source separate from the battery built in the electronic thermometer.

FIG. 2 is a block diagram showing a circuit of the actual measurement type electronic clinical thermometer. In the figure, (11) is a power source with a built-in battery in the electronic thermometer, (12) is a power switch, and (13) switches (12) are turned on so that all circuits (1
It is a power supply control circuit that supplies the power supply (11) to 4).

Next, the entire circuit (14) starts a time measurement from the time when the switch (12) is turned on and outputs a body temperature measurement trigger signal, and a time measurement control circuit (15) and a temperature sensing part (not shown) of the electronic thermometer. ) To operate the A / D conversion circuit (17) to input the detection signal and the trigger signal input from the time measurement control circuit (15) to measure the body temperature data (16) and this measurement circuit (16). 16) Data storage circuit (18) that inputs and stores the measured data and outputs the previously measured data, and the data measured by the measurement circuit (16) and the previous data output from the data storage circuit (18) The comparison calculation circuit (19) that inputs the measurement data and compares the difference between the measurement data and detects the start and end of the measurement, and the output of this comparison calculation circuit (19) drive the buzzer to start and start the measurement. Notification time to notify the end (20) and a from the display circuit (21) for displaying the measured values on a display, not shown.

Next, the operation of the present invention based on the above configuration will be described with reference to the flowchart shown in FIG. Now, when the electronic thermometer is inserted into the thermometer temperature raising device (2) shown in FIG. 1 and preheated, the electronic thermometer does not hold the maximum value, so it is pulled out of the device (2) and set in the mouth or underarm. Within a few seconds, the temperature sensing part of the thermometer drops to a value very close to the body temperature. Therefore, the power switch (1
When 2) is turned on, the power supply (11) is supplied to all circuits (14) via the power supply control circuit (13) (step-1). Then,
All circuits (14) are initialized (step-2), and the time measurement control circuit (15) starts time measurement. And, for example, K ₁ = 1
When the second has elapsed (step-3), the data storage circuit (18) stores the shifted value T- ₁ at this time (step-4). On the other hand, the measurement circuit (16) holds the measured value T ₀ when the value measured this time is within a predetermined temperature range, for example, 32 ° C to 43 ° C (step-5), and the data storage circuit (18). It is output to the comparison calculation circuit (19) together with the previous value T _-1 stored in. Then, the comparison operation circuit (19) displays the measured value | T ₀ −T ₋₁ |
Is calculated and compared with the first temperature set value D ₁ (= 0.5 ° C.) (step-6).

Therefore, when the result of comparison is | T ₀ −T ₋₁ | ≦ 0.5 ° C,
The next step-7, the current measured value T _0, is displayed on the display (not shown) via the display circuit (21) and the alarm circuit (20) is used to notify the thermometer of the start of body temperature measurement. The buzzer of the tone color 1 is driven, for example, K ₂ = 5 seconds is sounded (step-8), and then the buzzer is stopped (step-9). At this time, if | T ₀ −T ₋₁ |> 0.5 ° C., t = K ₁ again.
The subsequent steps are repeated.

After that, t _n = K ₃ (for example, 1 second) + K ₄ (for example, 0.05)
Second) × n (1,2,3, ...) Wait until time elapses (step-1
0), the previous measured value T _-1 is stored in the data storage circuit (18) (step-11). Here, n is the number of times of data sampling. On the other hand, the measured value when the body temperature is measured according to the instruction from the measurement circuit (16) is set to T ₀ (step-12).

Then, the comparison operation circuit (19) again calculates the measured value | T ₀ −T ₋₁ | at that time to obtain the second temperature set value D.
₂ (= 0.01 ℃) and compare (step-13). Therefore, when the result of comparison is | T ₀ −T ₋₁ | ≦ 0.01 ℃, the next step-14
After displaying the measured value T _{0 of} this time on the display, hold the measured value T ₀ and notify the thermometer of the end of the measurement by driving the second tone buzzer, for example, K ₅ = 10 seconds (St
After ep-15), stop the buzzer (step-16). At this time, if | T ₀ −T ₋₁ |> 0.01 ° C, t _n = K ₃ + K again
Steps after ₄ × n are repeated.

Then, if the measured value T ₀ is continuously displayed on the display, for example, K ₆ = 10 minutes (step-17), it is transmitted to the power supply control circuit (12) and the power supply (11) is automatically turned off (step -18).

As described above, in the thermometer temperature raising device (2), for example, 41
The thermometer, which was preheated to ℃, is pulled out from the temperature raising device (2) and the temperature sensor is set in the mouth or underarm of the thermometer within a few seconds. When this thermometer is set in the mouth or underarm, heat is rapidly absorbed and the characteristics shown in (1) to (3) in FIG.
It is verified that the equilibrium temperature is within ± 0.1 ° C within about 20 seconds. In addition, it shows the characteristics even when it takes more than 20 seconds to set it in the mouth or armpit, and the equilibrium temperature is ± 0.1 in about 1 minute.
Within ℃.

Thus, by using the actual measurement type electronic thermometer of the present invention in combination with, for example, the thermometer temperature raising device (2), when the conventional electronic thermometer was individually measured, the measurement time required 5 minutes or more. On the other hand, since the measurement can be performed in only one minute, the time can be significantly shortened, and at the time of measurement, it is possible to adjust the optimum temperature rise value for each thermometer.

Further, even if the above-mentioned thermometer temperature raising device (2) is not used, the measurement can be performed in the same time (5 minutes or more) as the conventional one, and the sampling cycle is represented by t _n = K ₃ + K ₄ × n. This is advantageous in that the number of body temperature measurements is reduced as shown in FIG. 4 and the battery life can be extended to more than twice that of the conventional one.

Further, in the present invention, since the buzzer sounds at the start of measurement, it is possible to judge whether or not the temperature sensing element is properly set in the mouth or underarm.

The present invention is not limited to the above embodiment,
The values of the constants K ₁ , K ₂ , K ₃ , K ₄ , K ₅ and K ₆ shown in FIG. 3 can be other values. Further, the two values of the present value and the previous value are not limited as the data for determining the start and end of the measurement, and it is possible to use the value several times before instead of the previous value. Further, even if the buzzer for informing the start of measurement does not sound, there is no problem in terms of function, and it is not always necessary to change the timbre between the start and end of measurement.

Further, the present invention can obtain the same effect without any problem even with a simple hot water tank in which hot water and water are put in a container instead of the thermometer temperature raising device (2) shown in FIG.

[Effect of device]

As described above, according to the present invention, the maximum temperature hold method, which is the conventional method for measuring the temperature of the actual measurement type thermometer, is not used, but the measurement start and end of the temperature measurement are measured during the data sampling period (previous value and current value). ), The thermometer is preheated to a value higher than the body temperature by using it in combination with an external device that does not have a problem with the power capacity of the thermometer, such as a thermometer temperature raising device or a hot water tank. It is also possible to measure, even though it is an actual measurement formula, it is ± 0 in a short time of about 20 seconds.
Body temperature can be measured with an accuracy of 1 ℃.

In addition, the temperature change ΔT for each measurement can be made larger than before by gradually increasing the data sampling cycle of body temperature measurement, so the determination of the end of measurement becomes more accurate and the number of measurements within the same time is Since the power consumption is further reduced, the power consumption is also significantly reduced (about 30% reduction in 1 minute measurement), and the battery life is extended.

Further, when the measurement start condition is satisfied, the start of measurement is notified to the outside by a buzzer, so that it is possible to judge whether or not the temperature sensing element portion of the thermometer is correctly set in the mouth or the armpit. That is, when the buzzer does not sound for several tens of seconds after being set in the mouth or underarm, it is possible to know that the body temperature is not correctly measured and it is necessary to reset.

[Brief description of drawings]

1 shows an embodiment of the present invention. FIG. 1 is a perspective view showing the appearance of a thermometer temperature raising device for preheating an actually measured electronic thermometer, and FIG. 2 is a block diagram showing the circuit configuration of the electronic thermometer.
FIG. 3 is a flow chart of the same example, FIG. 4 is a waveform diagram showing the relationship between the measurement time and the number of data samplings, and FIG. 5 is the temperature sensing element when the temperature sensing element is preheated to 41 ° C. and then measured. It is a wave form diagram which shows the change of a part. 1 ... Electronic thermometer, 2 ... Thermometer temperature raising device 11 ... Power supply, 12 ... Switch 15 ... Time measurement control circuit (time measuring means) 16 ... Measurement circuit (temperature measuring circuit section) 17 ... A / D Conversion circuit 18 …… Data storage circuit (storage means) 19 …… Comparison operation circuit (comparison circuit section) 20 …… Notification circuit (report means) 21 …… Display circuit (display means)

Claims (2)

[Scope of utility model registration request] 1. An electronic thermometer which is used after being preheated to an average body temperature or higher in advance, which has a temperature sensing element to detect a temperature corresponding to the body temperature, and a temperature measuring circuit section. Display means for displaying the temperature value output from the temperature circuit section, time measuring means for outputting a sampling signal for measuring the temperature detected in the temperature measuring circuit section, and each sampling signal output from the time measuring means A storage unit for storing the temperature value output from the temperature measurement circuit unit and outputting the stored temperature value; and a temperature value measured at the first sampling time output from the temperature measurement circuit unit. A comparison circuit unit that detects a difference from the temperature value measured in the second sampling time before that and stored in the storage unit, and measured in the first sampling time. When the temperature value is within a predetermined temperature range and the difference between the temperature values detected by the comparison circuit unit is within a preset first setting range, the start of body temperature measurement is notified, and An electronic clinical thermometer comprising: an informing unit for informing the end of the measurement of the body temperature when the difference between the temperature values detected by the comparison circuit unit enters the second set range. 2. After notification of the start of body temperature measurement by the notification means,
The electronic thermometer according to claim 1, wherein the time measuring means gradually lengthens the cycle of the sampling signal.