JPS6150025A - Electronic thermometer - Google Patents

Abstract

PURPOSE:To reduce power consumption, by starting a thermometer by an external switch, and measuring and displaying temperature at every short time interval only during a specified time. CONSTITUTION:When a power source is turned ON, a clock signal is started. A timer is started so that the temperature detection is continued at every short time interval. Then, e.g., a temperature sensor S1 is selected by the command from a CPU3 based on the operation of a switch 1. The temperature, which is measured at the short time interval by the sensor S1, is displayed on a temperature display part 2 and also stored in a memory 4. Until the specified time, the temperature detection, display and storing are continued at every short time interval. Therefore, the latest temperature is displayed on the temperature display part 2 during the specified time.

Description

[Detailed description of the invention] <Technical field of invention> The present invention relates to electronic thermometers.

<Prior Art and Problems> Conventional electronic thermometers have the disadvantage that the temperature sensor consumes a large amount of power when continuously detecting temperature, which is particularly inconvenient when the power source is a battery.

To compensate for this shortcoming, there are devices that detect temperature at longer time intervals, but in this case the temperature display does not change during the above time interval and therefore cannot always display the current temperature. OBJECT OF THE INVENTION In view of the drawbacks of the above-mentioned conventional examples, it is an object of the present invention to provide an electronic thermometer that can reduce power consumption and display the current temperature at a desired time. .

<Configuration and Effects of the Invention> In order to achieve the above object, the present invention measures the temperature at relatively short time intervals during a predetermined time after the start of measurement, and at relatively long time intervals after the predetermined time elapses. It is characterized by comprising means for measuring temperature, means for displaying the temperature measured by the temperature measuring means, and a switch for starting the predetermined time.

According to the present invention, the temperature dl11 is fixed and displayed at short time intervals only during a predetermined time period that is started by an external switch, so that power consumption can be reduced. Even in a thermometer equipped with a plurality of temperature sensors in a housing, the temperature measurement described above is carried out by selecting the sensor using an external switch, which has the effect of reducing power consumption.

<Embodiments of the invention> The present invention will be described in detail below with reference to the drawings.

FIG. 1 is a perspective view of an electronic thermometer according to an embodiment of the present invention, where S, , S are temperature sensors, and 1 is a switch.

2 is a temperature sensor S1. This is a temperature display section that displays the temperatures measured at S and S, respectively.

FIG. 2 is a block diagram of the electronic thermometer shown in FIG.
Switch to change 3. Arithmetic processing unit (CPU) 3, switch 1 and temperature display unit 2 in FIG. It is composed of a memory 4. The CPU 3 has a temperature sensor S as shown in Figure 3.
, , a relatively short time interval T for reading the temperature at S2
, and a relatively long time interval T.

pulses are set sequentially, with shorter time intervals T.

A time T0 is set for which the period continues.

FIG. 3 and FIG. 4 are a timing chart and a flow chart, respectively, for explaining the above embodiment.

When the power is turned on in step 11, a clock signal is started, and a timer for a time T0 for continuing temperature detection at every short time interval T1 is started.

Next, in step 12, the switch flag (SF) set in the CPU 3 is displayed. Here SF=
In the case of O, select temperature sensor S1 (step 13),
If 5F=1, select all the temperature sensors S (step 14). This senna selection is performed by a command from the CPU 3 using the changeover switch 3 shown in FIG.

In step 15, the temperature measured by the sensor selected in step 12, for example, the sensor S, at a short time interval T is displayed on the temperature display section 2, and the temperature
You can find it in the store.

Next, in step 16, it is determined whether the time T0 has ended or not. If it has not ended, the process branches to step 17, and the temperature is detected at every short time interval T.

Continue displaying and storing. Therefore, during the time To, the latest temperature is displayed on the temperature display section 2.

[Terama T. When completed, step 16 to step 18
The temperature is detected at every long time interval T. During this period, the latest temperature is not displayed, but the detected temperature is stored in the memory 4 and displayed on the display section 2. That is, the temperature display during this period is updated every time interval T.

As long as switch 1 in FIGS. 1 and 2 is not turned on, the process returns from step 19 to step 12, and loop 20 is repeated.

When switch 1 is turned on in step 19, the switch flag (Slli') is inverted and the process returns to step 11. In step 11, the clock signal is reset and restarted, and the clock signal is restarted at the correct time T. starts. Step 21
Since the SF is inverted in step 12, a different sensor than the previous one is selected, and the same temperature measurement, indication, and
Perform memory store. Repeat loop 22 every time switch 1 is turned on.

In the embodiment described above, a 2 liter temperature sensor is used, but a single sensor may be used instead to measure and display the latest temperature for a predetermined period each time a switch is pressed. Furthermore, three or more temperature sensors may be provided and switched by the above-mentioned external switch.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of an electronic thermometer according to an embodiment of the present invention;
Figure 2 is a block diagram of the electronic thermometer, Figure 3 is a timing chart, and Section 4 is a flowchart.

Claims (2)

[Claims] (1) means for measuring the temperature at relatively short time intervals during a predetermined time period after the start of measurement, and at relatively long time intervals after the elapse of the predetermined time period; An electronic thermometer comprising: means for displaying; and a switch for starting the predetermined time. (2) The temperature measuring means has a plurality of temperature sensors, one of the plurality of temperature sensors is selected by the switch, and the temperature detected by the selected temperature sensor is displayed on the temperature display means. An electronic thermometer according to claim 1, characterized in that: