JPS6110732A - Electronic clinical thermometer - Google Patents

Abstract

PURPOSE:To prevent erroneous operation, by constituting the thermometer by a temperature measuring part, a measured-temperature memory means, a maximum-temperature memory means and its display, an increasing-rate detecting means and its reporting means, a means for detecting decrease in measured temperature, and a means for detecting increase in measured temperature after said decrease. CONSTITUTION:At every sampling timing, the measured temperature from a temperature measuring part 1 is stored in a measured-temperature memory means 2. The maximum temperature is stored in a maximum-temperature memory means 3 and displayed on a display 4. When the fact that the increasing rate of the maximum temperature is within a specified value is detected by an increasing-rate detecting means 5, a reporting means 6 reports the fact to a measuring person. The convergent value, i.e., the bodily temperature, of the display 4 is read by the measuring person. When the measuring part 1 is separated from a part to be measured during the measurement and the temperature is decreased from the maximum temperature by a specified value or more, a measured-temperature-reduction detecting means 7 detects this fact and stops the function of the detecting means 5. When the measuring part 1 is returned to the part to be measured and the temperature begins to rise, a measured-temperature-increase detecting means 8 detects the fact. The function of the reporting means 6 is recovered, and the memory means 3 is initialized.

Description

DETAILED DESCRIPTION OF THE INVENTION (a) Field of Industrial Application This invention relates to an electronic thermometer, and particularly to a so-called peak-hold type electronic thermometer that displays the maximum temperature.

(B) Conventional technology Conventional peak-hold type electronic body temperature needles measure the temperature at each sample timing in the temperature measuring section, find the highest temperature among the measured temperatures, hold this highest temperature, and display it on the display. it's shown.

In addition, in general, with electronic thermometers, when the sensor is attached to the measurement site after temperature measurement and measurement begins, the detected temperature is initially low, and this detected temperature, that is, the measured temperature, increases exponentially over time, and eventually reaches a predetermined temperature. converges to the value. This convergence value is usually read as body temperature.

Some types of body temperature needles determine the rate of increase in maximum temperature to determine the point of convergence, detect when the rate of increase in maximum temperature falls below a predetermined value, and at that point send an alarm such as a buzzer. There is a device that notifies you of the problem and prompts you to read the display. In this type of electronic thermometer, the rate of increase to be determined is merely the rate of increase in maximum temperature.

(c) Problems to be solved by the invention In the above-mentioned conventional electronic body temperature needle, the rate of increase in maximum temperature is determined;
The notification means is actuated when the rate of increase falls below a predetermined value, but for example, if the sensor of the temperature measurement section comes off from the measurement site for some reason, or is temporarily removed by the person taking the measurement, Even if the measured temperature decreases, the maximum temperature remains constant. Therefore, the maximum temperature rise is almost negligible (and the notification means is activated when the maximum temperature rise value is below a predetermined value, and the alarm is activated as if the temperature had converged, even though it had not actually reached the convergence temperature yet. There was a problem that this could lead to false measurements.

This invention prevents recreational movements by not driving the notification means even if the measuring part comes off the measuring part,
Also, when the temporarily removed measurement part is attached to the measurement site,
The purpose of the present invention is to provide an electronic body temperature needle that can maintain measurement as is.

(d) Means for Solving the Problems In order to solve the above problems, the electronic thermometer of the present invention, as shown in FIG. Measured temperature storage means 2 for storing temperature; maximum temperature storage means 3 for updating and storing the maximum temperature among the measured temperatures; and display 4 for displaying the maximum temperature.
A rate-of-rise detection means 5 detects that the rate of increase in the maximum temperature is below a predetermined value, and a notification means 6 is operated in response to the output of the rate-of-rise detection means. Measured temperature drop detection means 7 detects that the temperature has dropped below the specified value and uses this detection output to stop the driving function of the notification means 6 by the rate of rise detection means 5, and detects the temperature rise after the drop and uses this detection output to stop the driving function of the notification means 6 by the increase rate detection means 5. The detection output releases the stoppage of the driving function of the notification means 6, and also releases the maximum temperature storage means 3.
and a measurement temperature rise detection means 8 for initializing the temperature.

(E) Function In this electronic thermometer, when the temperature measuring part 1 is attached to the measurement site and measurement is started, the temperature measuring part 1 measures the temperature at each sample timing, and the measured temperature each time is stored in the measured temperature storage means 2. Further, the maximum temperature up to that point is stored in the maximum temperature storage means 3. Then, the maximum temperature is displayed on the display 4. Also, increase rate detection hand 'Bt5
The rate of increase in the maximum temperature is determined, and it is detected whether the rate of increase is smaller than a predetermined value. If the temperature is rising at the beginning of the measurement, the rate of increase detected by the rate of increase detection means 5 is equal to or higher than the predetermined value, so the measurement continues, and the rate of increase detected by the rate of increase detection means 5 detects that the rate of increase is within the predetermined value. Then, the notification means 6 is driven by the output. When the notification means 6 is activated, the measurer can read the convergence value, that is, the body temperature, by reading the display 4 using the notification means.

Furthermore, if a phenomenon such as the temperature measuring part l coming off the measuring site occurs for some reason during the measurement, the measured temperature starts to drop. Although the maximum temperature stored in the maximum temperature storage means 3 does not change, the measured temperature gradually decreases over time, and when the maximum temperature drops to a certain value or more, this is detected by the measured temperature drop detection means 7. , This detection output causes the function of the increase rate detection means 5 to be stopped. Thereby, even if the maximum temperature value does not change and the rate of increase is smaller than a predetermined value, the notification means 6 is not driven.

Further, when the removed temperature measurement section 1 is attached to the measurement site again, the measured temperature starts to rise again.

This is detected by the measured temperature rise detection means 8, and accordingly, the drive function of the notification means 6 is stopped, and the maximum temperature storage means 3 is initialized, and the maximum temperature continues to be updated thereafter.

(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 electrical signal from the temperature sensor 11 into a digital signal and inputs it to the CPU 13. C
The PU 13 has a temperature measurement function that takes in the temperature signal from the A/D converter 12 at each sample timing, as well as a function to calculate the maximum temperature from among the measured temperatures, and a function to display the calculated maximum temperature on the display 15. , a function that calculates the rate of increase in the maximum temperature and detects when the rate of increase has become below a predetermined value, a function that drives the buzzer 17 as a notification means based on this detection, and a function that calculates the rate of increase in the maximum temperature. A function that calculates the difference value and stops the rate of increase detection function when the difference value exceeds a predetermined value.Furthermore, when the measured temperature rises again, this is detected and the stoppage of the rate of increase detection function is canceled. It also has a function to initialize the maximum temperature.

Note that 14 is a memory used to store the measured temperature and maximum temperature, and 16 is a power switch.

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

When the power switch 16 is turned on and the operation starts, initialization to the highest value is first performed in step STI. The initial value of the maximum temperature is selected to be lower than any of the predicted measured temperatures.

Subsequently, the rate of increase is initialized (step 5T2).
. The rate of increase is expressed as the value of temperature rise per predetermined time,
This initial value is selected to be slightly smaller than ■.

After the maximum temperature and rate of increase are initialized, temperature measurement is subsequently performed (step 5T3). That is, a temperature signal detected by the temperature sensor 11 is taken in by the CPU 13 via the A/D converter 12 and stored in the memory 14.

Next, compare the current measured value with the highest value up to the previous time (Step 5T4). If the measured temperature is rising as during normal measurement, the current measured value is larger than the highest value up to the previous time. This determination is YES, and then the highest value is updated, that is, the current measured value is stored as the highest temperature (step 5T5).

Next, the rate of increase is determined from the current maximum temperature and the previous maximum temperature, and it is determined whether this rate of increase is less than a certain value (step 5T6). At the beginning of the measurement, the maximum temperature is rapidly rising, so this determination is No, and then in step ST7 it is determined whether the measurement is complete. If the power switch 16 is not turned off, this determination is N.
0, return to step ST3, and do the same as last time.
Temperature measurement, updating of the highest value, and determination of whether the rate of increase is smaller than a certain value are repeated at each sample timing.

As the temperature rise progresses and the maximum temperature approaches the convergence value, the rate of increase becomes smaller than the constant value, and the determination in step ST6 becomes YES. Then, the buzzer 17 is turned on, and the buzzer notifies the measurer that the measured value has reached the convergence state (step 5T8). The measurer can measure body temperature by listening to the buzzer 17 and reading the maximum temperature value on the display 15.

Note that due to slight fluctuations or variations in the measured values, the measured values may become smaller than the previous maximum temperature, and the step ST
Even if the determination in step ST9 is No, if the difference value between the highest value and the measured value is smaller than a certain value, the determination in step ST9 is No.
Therefore, the process moves to step ST6, and the same measurement as described above is continued. That is, after temperature measurement, the maximum value is not updated, the measurement is continued while the maximum temperature is maintained, and the buzzer 17 is sounded when the rate of increase falls below a certain value.

Now, if the temperature sensor 11 comes off the measurement site for some reason during measurement, the measured temperature value will drop rapidly. Therefore, the determination of "Is the measured value>the highest value?" in step ST4 is N.
The result is O, and the process moves to step ST9, where "highest value - measured value"
Is it a constant value? ” is determined as YES. In other words, the difference value between the highest value and the measured value becomes a certain value or more.Then, the temperature is measured (step 5TIO), and it is determined whether the measured value has started to rise (step 5TII). ).While the temperature sensor 11 remains removed from the measurement site, the measured temperature is falling, and this determination is No. From then on, steps 5TIO1STII are repeated until the measured value starts to rise. .

When the temperature sensor 11 that has been temporarily removed is reattached to the measurement site, the measured temperature starts to rise again. Therefore, the determination in step 5TII becomes YES, and the operation returns to step STI, where the highest value is initialized. That is, the highest value up to that point is reset, and thereafter the normal operation similar to that at the beginning of the first measurement is resumed.

(G) Effects of the Invention According to the heavy cell thermometer of the present invention, when the measured temperature falls below a certain value with respect to the maximum temperature, the driving of the notification means is stopped when the rate of increase falls below a predetermined value. Therefore, even if the temperature sensor etc. is disconnected during measurement and the maximum temperature is held at a constant value, the buzzer or other notification means will not be activated, so the measurer cannot judge the convergence and read the maximum temperature in the middle. Therefore, erroneous measurements can be prevented.

In addition, when the measured temperature starts to rise, the prohibition of driving the alarm means is canceled, the maximum temperature is initialized, and the maximum temperature is stored in updated memory from now on, so it is possible to return to body temperature measurement without the risk of erroneous measurement. can. Therefore, even if the temperature measuring part is temporarily moved away from the measurement site, or if it becomes temporarily disconnected for some reason, there will be no problem and the measurement will continue until the correct convergence value is reached. It can be carried out.

[Brief explanation of the drawing]

FIG. 1 is a schematic block diagram showing the configuration of this invention, FIG. 2 is a block diagram of an electronic thermometer showing one embodiment of this invention,
FIG. 3 is a flowchart for explaining the operation of the electronic body temperature needle. 1: Temperature measurement section, 2: Measured temperature memorization technique, 3: Maximum temperature memorization technique, 4: Display device, 5: Rise rate detection means, 6: @knowledge means, 7: Measured temperature drop detection means, 8: Measuring temperature rise detection means patent applicant Tateishi Electric Co., Ltd. agent
Patent Attorney Shigeru Nakamura Figure 1 Figure 2

Claims (1)

[Claims] (1) A temperature measuring section that measures the temperature at each sample timing, a measured temperature storage means that stores the measured temperature, a maximum temperature storage means that updates and stores the maximum temperature among the measured temperatures, and a display that displays the maximum temperature. a rate of increase detection means for detecting that the rate of increase in the maximum temperature has become below a predetermined value; a notification means driven in response to the output of the rate of increase detection means; Measured temperature drop detection means detects that the temperature has dropped below a value and uses this detection output to stop the driving function of the notification means by the rate of rise detection means, and detects a temperature rise after the drop and uses the detection output An electronic thermometer comprising measurement temperature rise detection means for canceling the stoppage of the driving function of the notification means and initializing the maximum temperature storage means.