JPH01428A - rod thermometer - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a rod-shaped thermometer using a heat-sensitive sensor element.

Conventional technology Rod-shaped thermometers have been widely used in fields such as industry and education.

As is well known, this method takes advantage of the fact that the volume of mercury or alcohol expands and contracts depending on the ambient temperature, and it is small, inexpensive, and can measure temperature easily and relatively accurately. It has the advantage of being

Problems to be Solved by the Invention However, depending on the application, the maximum temperature or minimum temperature may be required for a certain period of time.

The above-mentioned thermometers generally do not have the function of storing temperature measurements, so when it is necessary to know the maximum and minimum temperatures, it is necessary to prepare a separate thermometer for that purpose.

The present invention solves these problems, and the current temperature,
The present invention aims to provide a rod-shaped thermometer that can selectively display one of the maximum temperature and the minimum temperature.

Means for Solving the Problems In order to achieve this object, the rod-shaped thermometer of the present invention includes a pipe-like body having good thermal conductivity and having one end closed, and a closed end side of the pipe-like body. It is integrated with the heat-sensitive sensor element placed inside and the other end of the pipe-shaped body.
and a circuit storage case having a temperature display section, and a circuit section and a power supply section that process the output signal of the heat-sensitive sensor element and store the maximum temperature and minimum temperature, which are housed in the circuit storage case. The circuit section selectively displays the current temperature, the maximum temperature, or the minimum temperature on the temperature display section.

Function: This thermometer electrically processes and stores the output signal of the heat-sensitive sensor element, and selectively displays the current temperature, maximum temperature, or minimum temperature on the temperature display section, respectively, as necessary. do.

Embodiment Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

FIG. 1 is an external perspective view of an embodiment of a rod-shaped thermometer according to the present invention, FIG. 2 is a plan view of its temperature display section, and FIG. 3 is a block diagram showing its circuit configuration.

As shown in FIG. 1, this embodiment includes a pipe-shaped body 1 made of a material with good thermal conductivity and having one end closed.
The other end portion is integrated with a circuit housing portion 2.

A heat-sensitive sensor element 3 is fixed within the closed end portion of the pipe-shaped body 1 with adhesive, for example, so as to be in contact with the inner wall surface thereof.

On the outer surface of the circuit housing section 2, there is a temperature display section 4 shown in FIG.
A display changeover switch 5 and an erase switch 6 are provided. Furthermore, inside this circuit storage part 2, as shown in FIG.
A temperature measurement circuit 7 having an analog-to-digital conversion function, a display circuit 8, a display switching circuit 9, and a temperature storage circuit 10 are housed.

In this embodiment, the temperature change sensed by the thermal sensor element 3 is transmitted as an electrical signal to the temperature measurement circuit 7 through a lead wire. The temperature measurement circuit 7 converts the analog signal corresponding to the temperature from the thermal sensor element 3 into a digital signal, and supplies the digital signal to the temperature display circuit 8 and the temperature storage circuit 10.

The temperature storage circuit 10 stores data on the maximum temperature and minimum temperature, and supplies the stored data to the temperature display circuit 9 as needed.

When you press the display changeover switch 5 or the erase switch 6,
As a result, the display switching circuit 9 operates the temperature display circuit 8 and the temperature memory circuit 10, and the current temperature, maximum temperature, or minimum temperature is selectively displayed through the temperature display circuit 8, or the memory content in the temperature memory circuit 10 is displayed. is erased. For example, by pressing the display changeover switch 5 once, the display mode is changed and the maximum temperature is displayed using the maximum temperature display mark 11 and numbers shown in FIG. Next, by pressing the display mode changeover switch 3 one more time, that is, by pressing it down for the second time, the minimum temperature is numerically displayed together with the minimum temperature display mark 12. If you press it further, that is, if you press it a second time, the current temperature will be displayed numerically. Furthermore, when the clear switch 4 is pressed while the maximum and minimum temperatures are being displayed, the data of the maximum and minimum temperatures stored up to that point will be erased from the temperature storage circuit 10.

Effects of the Invention According to the thermometer of the present invention, the output signal of the heat-sensitive sensor element can be electrically processed and stored, and the current temperature, maximum temperature, or minimum humidity can be displayed numerically as necessary. Since the sensor is shaped like a rod and the output signal processing section of the heat-sensitive sensor element and the display section are provided at one end, the temperature can be easily measured with a small size.

[Brief explanation of drawings]

FIG. 1 is an external perspective view of an embodiment of a rod-shaped thermometer according to the present invention, FIG. 2 is a plan view of its display section, and FIG. 3 is a block diagram showing its circuit configuration. DESCRIPTION OF SYMBOLS 1... Pipe-shaped body, 2... Circuit housing part, 3... Heat sensitive sensor element, 4... Temperature display part, 5...・Display changeover switch, 6...
... Erase switch, 7... Temperature measurement circuit, 8...
...Display circuit, 9...Display switching circuit, 10
... Temperature memory circuit, 11 ... Maximum temperature display mark, 12 ... Minimum temperature display mark. Name of agent: Patent attorney Toshio Nakao and one other person (QC).

Claims (1)

[Claims] A pipe-like body with good thermal conductivity and one end of which is closed;
A heat-sensitive sensor element disposed inside the closed end of the pipe-like body, a circuit storage case that is integrated into the other end of the pipe-like body and has a humidity display section, and the circuit storage case It includes a circuit section and a power supply section that process the output signal of the heat-sensitive sensor element housed in the case and store the maximum temperature and minimum temperature, and the circuit section stores the current temperature, the maximum temperature, or the minimum temperature. A rod-shaped thermometer that selectively displays information on the temperature display section.