JPS58186036A - Measuring apparatus of temperature characteristic - Google Patents

Abstract

PURPOSE:To obtain a temperature characteristic measuring apparatus capable of performing highly accurate measurement with good workability, by forming a tightly closed thermostat by a parallel plate-like heating unit of a half devided vessel facing each other. CONSTITUTION:A tightly closed space for forming a thermostat by parallel plale-like heating units 5a, 5b facing each other which are provided to each upper half part 1 and lower half part 2 of a half divided tightly closed vessel and generates heat by being supplied with electric power, is formed. A material 10 to be measured is held in this space by holding members 11a, 11b of an electric conductor and also, the variation of electric resistance etc. depending on the temperature of the material 10 is measured. Further, atmosphere gas can be filled in the closed space via through holes 23a, 23b. In this manner, a temperature characteristic measuring apparatus capable of performing highly accurate measurement with good workability is obtained.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an apparatus for measuring the temperature characteristics of a material whose resistance changes with temperature, such as a thermistor, or a material whose electromotive force changes with temperature, such as a thermocouple.

Conventionally, the method of measuring the temperature characteristics of materials as described above has been to place the material to be measured in a general-purpose thermostatic chamber. It takes time, and the temperature distribution is not uniform. The material to be measured handled by the inventors is a floor or several tens of watts.
Therefore, there was a lot of wasted time in the measurement, and it was difficult to accurately control the temperature of the material to be measured to the set value. Furthermore, some materials can only be measured in a cyclogenic atmosphere, but the conventional general-purpose constant temperature ovens described above do not have airtightness and therefore cannot be measured.

SUMMARY OF THE INVENTION An object of the present invention is to provide a compact device that can accurately measure the temperature characteristics of a material to be measured with good workability. The device of the present invention includes a half-split airtight container that can be opened and closed, a pair of electric heating elements that face each other inside the container when the container is sealed, a holding member that holds a material to be measured in a space between the heating elements, and a holding member that holds a material to be measured in a space between the heating elements. It includes a temperature sensing element placed close to the material to be measured and means for supplying a necessary atmospheric gas to the space.

The present invention will be explained below with reference to illustrated embodiments.

FIG. 1 shows a sectional view of the temperature measuring device. The airtight container A constituting the device is a circular metal container with a diameter and height of about 80 mm, and is divided into an upper half 1 and a lower half 2, and the contact surface with the upper half 1 is Hermeticity is maintained by an O-ring 3 fitted into a groove 21 formed in the end surface of the lower half 2. Further, bosses 22a and 22b are formed on the outer surface of the lower half 2 at positions facing each other in the radial direction, and through holes 23a and 23b reaching the inside of the container A are provided at the axial centers of the bosses 22a and 22b. An atmospheric gas introduction pipe and a discharge pipe (not shown) are connected to the above-mentioned posts 22a, 221), respectively.

On the other hand, stepped parts 1a and 2a are formed on the inner surfaces of the upper half part 1 and the lower half part 2, respectively. 41) are fitted into contact with the stepped portions 1a and 2a, respectively. A ceramic disk-shaped heating element 5a15b is bonded to the mutually parallel opposing surfaces of the supports 4a and 4b, and a pair of lead wires aa (one of which is not shown) for power supply is attached to the heating element 5a. Similarly, a pair of lead wires eb (one of which is not shown) is connected to the heating element 5b. The lead wires pass through through holes 41a and 41'b provided in the support bases 4aS and 4b, and are further passed through sealed glass terminals 7a and 71 provided in the upper half 1 and lower half 2 of the container A, respectively.
) is led out to the outside and reaches a thyristor circuit 8 for power supply connected to a temperature controller 9. The sealed glass terminals 7a and 7b are sleeves 71a made of Kovar alloy.
, 711), through which rod-shaped metal terminals 73a and r73b with lead wire rests formed at both ends are inserted, and their bodies are filled with soft glass.

Conductive material-to-be-measured holding members 11a and llb are inserted into the centers of the supports 4a and 4b, respectively, and the material-to-be-measured holding members 11a and llb are inserted between the opposing surfaces of the heating elements f5a and 51). The material 10 is sandwiched and supported from above and below. The holding members 11a, 111) include an outer tube 111a,
1llb and a shaft member 112 slidably fitted within the outer tube.
a, 112b, and the shaft members 112a, 11
Disk-shaped clamping parts 113a and 113b are formed at the tip of 2b. Further, in the outer tube 111a11111), clamping parts 113a, 1131) are provided with samples 1 having various lengths.
A spring member (not shown) is provided internally to bias the shaft members 112a and 112b in a direction to push them out so that the shaft members 112a and 112b can be pressed against each other. Lead wires 13a, 1 are attached to the holding members 11a, llb.
31) are connected to each other to form a loop-shaped circuit including the measuring device 12 and the material to be measured lO in order to detect a change in resistance or a change in electromotive force in the sandwiched material to be measured lO. The lead wire 13a113b passes through an insulated glass terminal 70.7α.

Furthermore, as shown in FIG. 4, a sheathed thermocouple 14, which is a temperature sensing element for temperature measurement, is inserted between the parallel surfaces formed by the heating elements 5a and 5b from the side surface of the lower half 2. The sheathed thermocouple 14 is connected to the temperature controller 9 through a compensating conductor (not shown).

FIG. 2 is an external view of the temperature measuring device whose cross section is shown in FIG. 1. Screws 16a (one of which is not shown) are screwed onto the outer surface of the upper half 1 of the closed container A at radially opposite positions, and the screws 16. Lever 1 with a as the pivot
5 is rotatably attached to the shaft. As shown in FIG. 4, the lever 15 is integrally molded in a U-shape with its upper end connected, and is slidable on the shaft of a screw 161) screwed onto the outer surface of the lower half 2.

The operation of the temperature measuring device constructed as above will be described below. The upper half 1 and lower half 2 of the closed container A can be separated as shown in FIG. 3, and the material to be measured 10 is placed on the holding member 11b of the lower half 2. Next, the upper half 1 and the lower half 2 are overlapped.

To do this, first stand the lever 15 vertically, and insert the screw 1 along the dogleg-shaped notch 151 formed in the lever 15.
-F half part 1 is lowered at the trench where 6b reaches the bent part of the notch 151. Subsequently, when the lever 15 is rotated clockwise in FIG. 2, the screw 16b is guided along the notch 151, so that the upper half 1 and the lower half 2 are locked in a pressed state. At this time, the upper half 1 is placed on the holding member 11b of the lower half 2 in advance, and the upper half 1 is placed on the material to be measured 1O.
The holding members 11a are in pressure contact with each other, and the material 10 is in contact with both holding members 1
1a, 111).

The ambient temperature in which the material to be measured 10 is placed is detected by the sheathed thermocouple 14 and fed back to the temperature controller 9. The temperature controller 9 compares the set temperature with the fed back ambient temperature, and controls the temperature via the sirinuta circuit 8 so that the ambient temperature becomes the set temperature.
Controls the power input to the heating element 5a151).

The spaces in which the materials to be measured 10 are placed are mutually ---'
? --- Since it is extremely small formed by the parallel plate-shaped heating elements 5a and 5b, the ambient temperature is lower than that of the heating elements 5.
It quickly follows the temperature of points a and 5b, and there is no unevenness in temperature distribution. Since the temperature of the material 10 to be measured closely follows the ambient temperature, the holding member 11a, which is brought into pressure contact with the material 10, while gradually increasing the set temperature of the temperature controller,
If a change in the current or voltage in the loop-shaped circuit is detected by a measuring device through Ilb, the temperature characteristics of the resistance or electromotive force of the material to be measured 10 can be known. Furthermore, by flowing a certain amount of atmospheric gas through the reducing gas inlet/outlet 22a122b, the atmosphere can be made reducing, and rapid cooling is also possible.

As described above, since the temperature characteristic measuring device according to the present invention has two parallel plate-shaped heating elements placed close to each other and housed in a compact sealed container, it is particularly possible to quickly raise and lower the temperature of small pieces of thin material. This eliminates unevenness in temperature distribution, making it possible to measure temperature characteristics accurately. Furthermore, if an atmospheric gas -8 is introduced into the closed container, measurement under a gas atmosphere is also possible.

In this embodiment, only one pair of holding members is provided, but if several pairs of holding members are provided, temperature characteristics of several materials can be measured at the same time.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention, in which Fig. 1 is a longitudinal cross-sectional view of the entire temperature measuring device, Fig. 2 is an external view of the sealed container of the measuring device, and Fig. 3 is the state in which the sealed container is opened. FIG. 4 is a partial side view as seen from another direction. A... Sealed container 1... Upper half of the sealed container 2... Lower half of the sealed container 5a15b... Heating element '7a, 7b, 70 .7d・−・・−・Terminal lO・
... Material to be measured xlaSxlb ... Holding member 14 ... Temperature sensing element for temperature measurement (sheath thermocouple)
Representative Patent Attorney Ito Kyumatan Figure 1 Figure 3 Figure 4 b

Claims (1)

[Claims] Flat electric heating elements are installed in the upper and lower halves of the sealed container, which can be divided into upper and lower halves, so as to form opposing parallel surfaces when sealed, and the material to be measured is placed between the heating elements. A conductive holding member for the material to be measured, which is expandable and contractible in the thickness direction of the material, is provided to hold the material, and a temperature characteristic signal of the material to be measured obtained through the holding member is transmitted to the outside of the container. A terminal and a terminal for supplying power to the heating element are respectively provided in the container, and the container is provided with an inlet/outlet for atmospheric gas, and a temperature sensing element for measuring the atmospheric temperature in the container is placed close to the material to be measured. A patent characterized by the fact that