JPS584975B2 - temperature measuring device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a temperature measuring device for measuring the surface temperature of an elongated cylindrical object such as an electric wire.

Conventionally, when measuring the surface temperature of an object, temperature information is obtained by bringing a heat-sensitive element into contact with the measurement location and making the temperature of the heat-sensitive element equal to the surface temperature.

Therefore, in order to reduce temperature measurement errors, various measurement means have been considered in which the heat-sensitive element is brought into close contact with the measurement point as much as possible to improve thermal conduction.

For example, when measuring the same location continuously for a long time, the temperature measurement error is minimized by welding or mechanically bonding the thermosensitive element to the part to be measured.

On the other hand, when measuring temperatures at a plurality of locations using the same measuring device, the heat-sensitive element cannot be fixed to the location to be measured.

Therefore, in this case, a relatively good contact state is obtained by configuring the heat-sensitive element to be pressed against the measurement point using an elastic means such as a spring.

However, when measuring with such a measuring device,
When a heat-sensitive element is pressed against a measurement point, it is difficult to accurately confirm the contact state, especially when the heat-sensitive element is pressed against a high cylindrical object such as an electric wire.

Therefore, a state of poor contact is likely to occur (and temperature measurement errors often occur).

This invention was made in view of the above circumstances,
It is an object of the present invention to provide a temperature measuring device that can accurately measure the surface temperature of a cylindrical object to be measured such as an electric wire.

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

FIG. 1 shows its configuration, in which a measuring section 11 includes a flexible elongated heat-sensitive element 12 made of, for example, a thermistor thermocouple, a semiconductor heat-sensitive element, etc., and a long and thin one to which this heat-sensitive element 12 is attached. It is a support 13 in the form of a planar bag made of, for example, hard polyethylene and whose ends are sealed.

The support 13 is, for example, formed in a natural state so as to be wound in a spiral as shown in FIG. 2, and the heat-sensitive element 12 is adhered along the inner surface of the spiral.

The support body 13 is set to extend linearly as shown in FIG. 1 by introducing air through its opening.

This support 13 is attached at its open end to the air control section 14 .

This air control section 14 is connected to the cylinder 1 as shown in FIG.
5, and this cylinder 15 communicates with the opening of the support body 13 via a connecting cylinder 16.

A piston 17 is mounted within the cylinder 15, and this piston 17 is moved linearly within the cylinder 15 by a piston rod 18 to control the intake and withdrawal of air within the support body 13.

In this case, the piston 17 is provided with an appropriate valve 19, and especially when lowering the air pressure in the support 13, that is, when the piston 17 moves downward in the figure as shown in FIG.
The state shown in FIG. 2 may be quickly set by opening the support body 13 and making the inside of the support body 13 equal to the outside pressure.

The piston rod 18 is connected to a control rod 21 that is driven as shown by the arrow along a guide hole 20 formed in the side surface of the casing 14a of the air control section 14, as shown in FIG.
Normally, the spring 22 sets the state shown in FIG. 4, that is, the state in which the piston 17 is pushed down and the support body 13 becomes spiral.

The control rod 21 is, for example, integrated with an operating rod 23.

This operating rod 23 extends upward and has a locking claw 2 at its tip.
4, and when the control unit 14 is pulled down after being engaged with the electric wire 25 that is the object to be measured, the control rod 21 is moved by the spring 2.
2, it is raised as shown in FIG. 3, and air is sent into the support body 13.

The temperature measurement signal from the heat-sensitive element 12 is led to the temperature measuring section 26 using a lead wire as appropriate, and is displayed or recorded as appropriate.

That is, the device configured in this manner locks the square locking claw 24 to the electric wire 25 that is the object to be measured during this measurement.

Then, the housing 14a of the air control unit 14 is pulled downward (thereby pushing down the piston 17, and the air in the cylinder 15 is sent into the support body 13, as shown in FIG. 3).

Therefore, as shown in FIG. 1, the support 13, which is spirally wound in its natural state, extends linearly.

Then, the surface of the extended support 11 to which the heat-sensitive element 12 is adhered is pressed against the electric wire 25, and the housing 1 is pulled.
Return 4a upwards.

That is, the piston 17 is lowered by the action of the spring 22 as shown in FIG. 4, and the air pressure within the support body 13 becomes equal to the outside air pressure.

Therefore, as shown in FIG.
3 is wound into a spiral shape, and the heat-sensitive element 12
is brought into contact with the surface of the electric wire 25 in a well-adhered state.

Then, the temperature measuring section 26 can measure the surface temperature.

Such a temperature measuring device is easy to use and has a relatively simple structure, so it is small, lightweight, and inexpensive.

Moreover, temperature measurement errors due to poor contact can be minimized, and contact confirmation is not so necessary, for example, even when measuring objects at high places.

As described above, according to the present invention, it is possible to provide a temperature measuring device that can accurately measure the surface temperature of a cylindrical object to be measured such as an electric wire.

[Brief explanation of the drawing]

The figures show a temperature measuring device according to an embodiment of the present invention, in which Fig. 1 shows the support body, which is the measuring part, in an extended state, and Fig. 2 shows the support body wrapped around the object to be measured. FIGS. 3 and 4 are cross-sectional views illustrating the operation inside the air control section of the apparatus, and FIG. 5 is a side view of the casing of the apparatus. 11... Measuring section, 12... Heat sensitive element, 13... Support, 14... Air control section, 14a... Housing , 15...°...Cylinder, 16...Connecting cylinder, 17...Piston, 18...Piston rod, 19...Valve, 20... ...Guide hole, 21 ... Control rod, 22 ... Spring, 23 ... Operation rod, 24 ... Locking claw, 25-・−・・−Electric wire,
26...Temperature measurement section.

Claims (1)

[Claims] 1 Strong in a natural state (a wound elongated bag-shaped support, a heat-sensitive element adhered to the inner surface of the support in the winding direction, an air control unit that controls the air pressure inside the support, A temperature measurement device comprising: a temperature measurement section that measures temperature information sensed by the heat-sensitive element.