JPS61243333A - Temperature detector - Google Patents

Abstract

PURPOSE:To enable easy to handle and accurate temperature measurement, by burying a resistance element for temperature detection into a contact plate, which is pressed on a measuring surface with a magnet to be attracted onto the measuring surface and a pressing means. CONSTITUTION:A magnet 1 is mounted on a holding plate 2 so as to be attracted onto a measuring surface 0. A highly heat conductive contact onto a measuring surface 0. A highly heat conductive contact plate 3 is mounted on the holding plate 2 through a pressing means 5 such as spring. A resistance element as temperature detecting element is buried into the contact plate 3 to form a temperature detector. As the temperature detector approaches the measuring surface 0, the contact plate 3 is pressed on the measuring surface 3 simultaneously with the attraction of the magnet 1 onto the measuring surface 3 and thus, heat is introduced to the resistance element handily as well as accurately thereby enabling the detection of the temperature.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a temperature detector that detects one degree using a resistance element.

(Prior Art) Conventionally, there is a method of molding a resistance element such as a resistance temperature detector or a thermistor with a molding material such as silicone rubber or epoxy resin, and bringing it into contact with the surface of a measurement object to measure the temperature.

[Problems to be solved by this invention] However,
There was a problem in that the heat capacity of the molding material was large, resulting in a temperature being measured that was lower than the actual temperature of the object to be measured. Moreover, the contact state with the measurement surface and the position of the resistance element within the molding material are not constant, resulting in problems such as variations in products, measurement accuracy, and response. In view of the above points, it is an object of the present invention to provide a temperature detector that uses magnets 1 to 1 and makes more reliable temperature measurement possible.

[Means for Solving the Problems] The present invention comprises a magnet 1 to which is attracted to a measurement surface, a contact plate with good heat conduction that is pressed onto the measurement surface by a pressing means,
The temperature sensor includes a resistance element embedded within the contact plate.

[Example] FIG. 1 is a partially sectional side view showing an example of this light.

In the figure, 1 is, for example, a donut-shaped magnet l-
A space 1a is formed in the center.

A holding plate 2 made of an insulating material provided on the upper surface of the magnet 1 has openings 2a and 2b communicating with the space 1a of the magnet 1 at the center and at appropriate locations.

A column 4 fixed to the upper surface of the contact plate 3 in the space 1 of the magnet 1 is inserted into the opening 2b of the holding plate 2 via a pressing means 5 such as a spring, and the upper part of the column 4 is inserted into the opening 2b of the holding plate 2.
a is provided to hold the contact plate 3. The 1)-domain wire 6 from the contact plate 3 is covered with a suitable insulating vibrator 8 from the protector 7 of the holding plate 2 and pulled out to the outside, and the humidity is measured and indicated by a suitable measuring means. In addition,? The net 1, the holding plate 2, and the protective body are integrated with suitable tightening means 7a.

The details of the contact plate 3 are, for example, as shown in FIG. 2, a resistance element 10 such as a temperature-measuring resistor is buried in the internal space via an adhesive 9, the contact plate 3 is closed with a lid 3a, and a lead wire is connected to the contact plate 3. The structure is such that 6 can be taken out.

In other words, when the magnet 1 is attracted to the measurement surface O, the plate surface of the contact plate 3 that slightly protrudes from the bottom surface of the magnet 1 comes into contact with the measurement surface 0 and is lifted to the same plane position as the 1 surface of the magnet 1. , the contact plate 3 is pressed downward by the pressing means 5, and the contact plate 3 is pressed against the measurement surface 0. In this state, the temperature of the measurement surface 0 and the temperature of the contact plate 3 with good heat conduction become equal temperature immediately, and the resistance value of the resistance element 10 corresponding to this temperature can be taken out from the lead wire 6. Further, since the space 1a is an air layer above the contact plate 3, heat is not easily transmitted, and a more accurate temperature measurement can be performed. Further, by adjusting the strength of the spring pressure of the pressing means 1 or adjusting the position of the nut 4a of the support 4, it is possible to adjust the strength of the pressure bonding of the contact plate 3=4 and the degree of downward protrusion.

In other words, when the measurement surface O is a curved surface, as shown in Figure 3,
Accordingly, the magnet 1 and the contact plate 3 may have curved surfaces, and the shape of the magnet may be as shown in FIG.
It may be rectangular depending on the application, the position of the contact plate 3 does not necessarily need to be in the center, and the magnet 1 does not need to be entirely a magnet.

[Effect of the invention] ■Uses magnets, so it's easy to put on and take off.

(2) Since the contact plate in which the resistance element is embedded is pressed onto the measurement surface by the pressing means, the degree of adhesion is good and the pressure can be applied with a constant pressure, so there is little variation in measurement due to individual differences.

■The contact plate is made of a material with good thermal conductivity such as metal, and there is no molding material, and the upper part is an air layer, so it has a small heat capacity and does not cool the measurement surface, and it is immediately connected to the measurement surface. The temperature is isothermal, the response is good, and highly accurate measurements closer to the true value are possible.

[Brief explanation of drawings]

FIG. 1, FIG. 2, FIG. 3, and FIG. 4 are explanatory views showing one embodiment of the present invention. DESCRIPTION OF SYMBOLS 1... Magnet, 2... Holding plate, 3... Contact plate, 4... Support column, 5... Pressing means, 6...
Lead wire, 7... Protector, 8... Insulated pipe,
9... Adhesive material, 10... Resistance element patent applicant Chino Seisakusho Shin Co., Ltd.

Claims (1)

[Claims] 1. A temperature sensor comprising: a magnet that attracts a measurement surface; a contact plate with good thermal conductivity that is pressed onto the measurement surface by a pressing means; and a resistance element embedded in the contact plate.