JPS60128319A - Temperature measuring resistor surface sensor - Google Patents

Abstract

PURPOSE:To obtain a titled sensor which has a simple structure, strong mechanical strength, high accuracy and high response speed by winding a resistance wire of platinum to a wind core, containing these wind cores in a space part of a metallic plate, and thereafter, packing an insulator, and forming a sensor. CONSTITUTION:A resistance wire 3 of a platinum wire, etc. is wound continuously around two cylindrical wind cores 2 of glass, etc., a weld zone 4 is formed by welding terminals of both the resistance wires 3 so as to become a prescribed resistance value, and one resistance wire is formed. That which has connected in series two wind cores 2 to a space part 7 of a discoid metallic plate 6 consisting of steel, silver, stainless steel, etc. is inserted from an inserting port 8. Thereafter, the space part 7 is packed with an insulator 9 of inorganic or organic substance, etc., the wind core 2 is fixed, and a sensor 1 is formed.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a resistance temperature sensor surface sensor in which a resistance element is enclosed in a metal plate.

Conventionally, thermocouples have been mainly used as surface sensors to measure the surface temperature of objects. The reason for this was that it was difficult to manufacture small platinum resistive elements, and although some were manufactured using resistors, the resistors were placed between silicone rubber, making them difficult to manufacture. The speed is slow, and if the resistor comes off, the resistance value will change, making it difficult to handle.Furthermore, there are also products that have the resistor deposited on the ceramic surface, but they are indispensable. This is because it is easy to use, is sensitive to moisture, has poor accuracy, and has large drawbacks.

By the way, even when using a thermocouple, the contact between the contact point in the sensor part and the surface to be measured is unstable, and the sensor part is thin so it is easily affected by the surrounding atmosphere. , the change over time is much greater than that using a resistor, the sensor part is exposed, so it is easily damaged by being caught during handling, and its mechanical strength is weak. This method has disadvantages such as the need to use a compensating conductor, which tends to cause measurement errors.

This invention has been made in order to eliminate the above-mentioned drawbacks. This invention will be explained below.

Figures 1 (a) and (b) show one embodiment of this invention.
There is 1-□1 yo 5w1m□. In these figures, reference numeral 1 denotes a resistance temperature sensor surface sensor (hereinafter simply referred to as a sensor), which is configured as follows. - For example, a resistance wire 3 such as a platinum wire is continuously wound around two cylindrical winding cores 2 made of glass or the like, and a small platinum resistance wire with a wire diameter of about 0.0025 mm is used. Two wires 3 are wound toward the two ends at a predetermined interval, and the ends of both resistance wires 3 are welded to a predetermined resistance value to form a welded part 4.
form a part of the resistance line. A resistance wire 3 is similarly wound around the other winding core 2, and connected in series with the resistance wire 3 of the one winding core 2. 5 is the sunrise line of the resistance line 3, 6
After inserting the two winding cores 2 through the insertion opening 8 into the connecting part 7 made of disc-shaped steel, silver, stainless steel, etc., the space part 7 is filled with an insulating material 9 such as inorganic or organic material, and the winding core 2 are fixed to form the sensor 1 of the present invention. Reference numeral 10 denotes a pillar conductor, to which the eyeliner 5 is connected by appropriate means via a relay wire 11 such as a ribbon wire. Reference numeral 12 indicates a heat-resistant pipe made of a material such as fluororesin, and 10 to 12 are those used during use.

FIG. 2 is a side view showing an example of how the sensor 1 is used. In this figure, the heat-resistant pipe 12 is further connected to a long pipe 13 made of phenolic resin, and a vinyl lead 14 is inserted inside.
The lead wires 5 of the sensor 1 shown in FIG. 1 are connected to each core wire.

In use, the metal plate 6 of the sensor 1 is held against the surface of the object to be measured while being held by the pipe 13, and the temperature is measured from the resistance value of the resistance wire 3 at that time.

Figure 3 (a), (b), Figure 4 (IL), (
b) shows other embodiments of the present invention, each figure (5L) is a partially cutaway plan view, and each figure (b) is an IF-II
, is a side sectional view taken along line II. In these Figures, the same symbols as in Figure 1 indicate the same parts.

In the embodiment shown in FIG. 3, a space 7 is formed in a straight line at the center of the metal plate 6, and two nine-wound cores 2 are accommodated in the space 7, which are wound symmetrically with respect to the center. be. In this embodiment, the core 2 can be easily inserted.

In the embodiment shown in FIG. 4, two spaces 7 are formed near the center and parallel to each other, and the winding core 2 is housed in each space. In the case of this embodiment, since the length of one winding core can be increased, the distribution ratio of the resistance wire 3 on the surface of the metal plate 8 is improved, and the response speed can be improved.
In addition, since the number of turns of the resistance wire 3 can be increased, a high-resistance resistance element 1 can be obtained.

5 and 6 show still other embodiments of the present invention, in which the sensor 1 is attached to the heat-resistant pipe 12 so that the axis of the rectangular sensor 1 and the axis of the heat-resistant pipe 12 are connected. FIG. 6 shows a case in which a heat-resistant pipe 12 is provided at the center of a disc-shaped sensor 1 at right angles to the surface thereof.

Incidentally, as shown in FIG. 7, the part from which the sunrise line 5 is taken out does not necessarily have to be at the center of the sensor 1.

As explained above, in this invention, a platinum resistance wire is wound around a winding core, and these winding cores are housed in a space inside a metal plate, and then filled with essential materials to form a sensor. It is simple, has strong mechanical strength, does not break during use, has much better accuracy than conventional thermocouples, is not affected by ambient temperature, and is inexpensive. It has various advantages such as easy manufacturing and fast response speed.

[Brief explanation of drawings]

FIGS. 1(&) and (b) are a partially cutaway front view and a side sectional view taken along line I-I of a sensor showing an embodiment of the present invention, and FIG. 2 is an example of how the sensor shown in FIG. 1 is used. Side view, Figure 3 (5L
), (b), Figure 4 (a). (b) shows other embodiments of this invention,
Each figure (a) is a partially cutaway front view, each figure (b) is a ■-■ line,
Side sectional view taken along the line Xia-■, Figure 5. In both Figures 6 and s7, further parts of the present invention are welded parts, 5 is a lead wire, 6 is a metal plate, 7 is a space, 8 is an insertion opening, 9 is an insulator, 1O is a support, (a) No. (a) No. (a)' 5, J Figure 1 (b) Figure 3 (b) Figure 4 (b)

Claims (1)

[Claims] A resistance temperature detector characterized in that a platinum resistance wire wound around a winding core is housed in a space within a metal plate having high thermal conductivity, and the space is filled with an insulator to form a structure. surface sensor.