JPH09159705A - Apparatus for measuring electric characteristic - Google Patents

Abstract

PROBLEM TO BE SOLVED: To continuously measure under extremely low temperatures by providing a plurality of clamping means for fixing and holding at two points, a transfer means, an electric characteristic-measuring means and a fixing/connecting means for mechanically and electrically fixing/connecting at two points. SOLUTION: As a first chain 3 and a second chain 3, drive, a linear sample 1 is fixed without being loosened by a clamping part consisting of a first clamping part 2 and a second clamping part 2'. When a driving part 14 drives to feed a driving force to a sprocket gear, the clamping parts 2 and 2' fixing the sample 1 are also driven along a locus indicated by a chain line. At a timing when the sample 1 is located between an upper terminal 8 and a lower terminal 6, a roller butts against a breadthwise part of a cam 11, and the sample 1 is held between the terminals 8 and 6 to be electrically connected to a measuring part 16. At the same time, the sample 1 is fixed mechanically by a moment generated by a self weight of a weight.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electric characteristic measuring device for measuring electric characteristics of a linear material, and particularly to an electric characteristic such as electric resistance of a metal material under a special environment such as an extremely low temperature. The present invention relates to an electric characteristic measuring device for measuring characteristics.

[0002]

2. Description of the Related Art Conventionally, a four-terminal method such as a Wheatstone bridge or a double bridge has been used for measuring electric resistance, which is one of electric characteristics of metal materials.
However, in the general four-terminal method, 1) it is not possible to efficiently measure the electrical resistance of a plurality of measurement target samples at the measurement site.

2) There is no method for measuring the electric resistance of a sample to be measured in an extremely low temperature atmosphere such as in liquid nitrogen (N ₂ ) or liquid helium (He). And other issues. As a method of solving the above problem 1), as disclosed in JP-A-60-220872, a standard electric resistance and a sample resistance to be measured are connected in series to obtain the standard electric resistance and the sample resistance. A method of automatically measuring the electric resistance of a plurality of sample resistances by energizing and sequentially measuring the voltage and temperature across each resistance can be mentioned.

As a method for solving the above problem 2), when measuring the purity of a sample disclosed in Japanese Patent Laid-Open No. 60-157041, a sample is used by using a small cryogenic refrigerator by a gas cycle. It is conceivable to apply the method of measuring the electric resistance of the sample at each temperature while lowering the temperature, and obtaining the residual electric resistance from the measured electric resistance value.

[0005]

By the way, due to the progress of technology in the field of superconductivity, there are many kinds of substances exhibiting the superconductivity phenomenon in a cryogenic state. In addition, as the shape of these superconducting substances, linear ones are becoming more popular from a practical point of view. There is a need for a device that can measure well and continuously.

However, in the resistance measuring device described in Japanese Patent Laid-Open No. Sho 60-220872, the partial electric resistance of one continuous sample can be continuously measured by its principle, but they are independent of each other. There is a problem in that the electrical resistances of the plurality of samples cannot be continuously measured under the same measurement conditions (temperature, etc.).

Further, in the purity measuring apparatus described in the above-mentioned Japanese Patent Laid-Open No. 60-157041, the purpose is to use the apparatus for identifying the material of the sample. There is a problem that it is not suitable for the measurement of a linear sample having the above-mentioned characteristics and that the electrical characteristics such as electric resistance cannot be measured efficiently for a plurality of samples.

Therefore, an object of the present invention is to make it possible to continuously measure the electrical characteristics such as the electrical resistance of a plurality of linear samples which are independent of each other under a cryogenic condition or in an arbitrary atmosphere. It is to provide a characteristic measuring device.

[0009]

In order to solve the above-mentioned problems, the invention according to claim 1 has a plurality of clamp means for fixing and holding a linear sample at two points separated by a predetermined distance, and the clamp means. Conveying means for sequentially conveying to the measurement position, and measuring means for measuring the electrical characteristics of the linear sample,
Fixed connection for mechanically fixing the linear sample held by the clamp means conveyed to the predetermined measurement position at two points separated by a predetermined distance at least during the measurement period and electrically connected to the measurement means. And means.

According to the first aspect of the invention, each of the clamp means fixes and holds the linear sample at two points separated by a predetermined distance. The transport means sequentially transports each of the clamp means on which the linear sample is fixedly held to a predetermined measurement position.

In parallel with the fixing and holding operation by the clamp means and the conveying operation by the conveying means, the fixed connecting means, at least during the measurement period by the measuring means, of the linear sample held by the clamp means is conveyed to a predetermined position. It is mechanically fixed at two points separated by a predetermined distance and is electrically connected to the measuring means, and the measuring means measures the electrical characteristics of the linear sample.

According to a second aspect of the present invention, in the first aspect of the invention, the fixed connection means is mechanically fixed and electrically connected to the measuring means while the conveying means conveys the clamp means. Is configured to be released.
According to the invention described in claim 2, in addition to the function of the invention described in claim 1, the fixed connection means is mechanically fixed and electrically connected to the measuring means while the conveying means conveys the clamping means. (Temporarily) is released, the transport means can again transport each clamp means on which the linear sample is fixedly held.

According to a third aspect of the present invention, in the first or second aspect of the present invention, the conveying means drives the chain, and a chain formed in an annular shape in which the clamp means is fixed at a predetermined position. Drive means for transporting the clamp means by doing so.

According to the invention of claim 3, in addition to the operation of the invention of claim 1 or 2, the drive means of the conveying means drives the chain having the clamp means fixed at a predetermined position. The clamp means is conveyed on an annular orbit. According to a fourth aspect of the present invention, in the invention according to any one of the first to third aspects, each of the fixed connecting means abuts on the linear sample so that the linear sample cooperates to clamp the linear sample. In addition, at least one of the first connecting member and the second connecting member functions as a terminal for electrically connecting the linear sample to the measuring means, and the first connecting member and the second connecting member are the linear sample. Holding a weight member for applying a load for mechanically fixing the linear sample by its own weight to the first connecting member and the second connecting member, and a cam member, A separating means for separating the first connecting member and the second connecting member against the load of the weight member based on the conveying state of the clamping means in the conveying means.

According to the invention described in claim 4, in addition to the function of the invention described in any one of claims 1 to 3, the first connecting member and the second connecting member constituting each fixed connecting means are , The linear sample is clamped cooperatively by abutting the linear sample at a predetermined distance apart from each other, mechanically fixed, and electrically connected to the measuring means.

In parallel with this, the weight member is provided with respect to the first connecting member and the second connecting member when the first connecting member and the second connecting member hold the linear sample. ,
A load for mechanically fixing the linear sample is applied by its own weight. On the other hand, the separating means uses the cam member to separate the first connecting member and the second connecting member against the load of the weight member based on the conveying state of the clamp means in the conveying means.

According to a fifth aspect of the invention, in the invention according to any one of the first to fourth aspects, at least during the measurement by the measuring means, the linear sample and the fixed connecting means which are the measuring objects are to be measured. Is maintained at an extremely low temperature or in an arbitrary atmosphere.

According to the invention described in claim 5, in addition to the function of the invention described in any one of claims 1 to 4, the measuring tank is a measuring object at least during the measurement by the measuring means. A certain linear sample and the fixed connecting means are held at an extremely low temperature or in an arbitrary atmosphere.

[0019]

Preferred embodiments of the present invention will now be described with reference to the drawings. FIG. 1 shows a front sectional view of an electric resistance measuring apparatus for automatically measuring electric resistance as an electric characteristic.

The electrical resistance measuring device is roughly classified into a main body 3 having an outer casing 47 and a measuring tank 7 for accommodating a measurement sample.
0, and a control unit 13 that controls the entire electrical resistance measuring device,
A driving unit 14 that functions as a driving unit that applies a driving force for transporting the measurement sample, and a measuring unit 16 that functions as a measuring unit that measures the electrical resistance of the measurement sample are configured.

In the measuring tank 7 of the main body 30, a plurality of clamp parts composed of the first clamp part 2 and the second clamp part 2'is fixed, and driven by the drive part 14 to convey the plurality of clamp parts. At the same time, when the electric resistance is measured, the conveyance unit 40 functions as a conveying means to interrupt the conveyance and hold the clamp portion at a predetermined position, and the measuring terminal 6 for measuring the electric resistance when measuring the electric resistance (see FIG. 3). ) Is brought into contact with the linear sample 1 to be electrically connected to the measuring section 16, and at the same time, the measuring terminal 6 is mechanically fixed to the linear sample, and a machine for the measuring terminal 6 when the electric resistance is not measured. Measurement terminal unit 45 (FIG. 3) that functions as two fixed connection means to disconnect the fixed connection and the electrical connection.
), And are provided.

In this case, the clamp portion functions as a clamp means, the transport unit 40 functions as a transport means, and each of the pair of measurement terminal units 45 functions as a fixed connection means. The outer casing 47 has a suction port 24 for performing vacuum suction, and the vacuum chamber 26 functions as a heat insulating layer for keeping the measurement chamber 7 in a cryogenic state.
And a liquid nitrogen tank 27 having a feed port 25 for feeding liquid nitrogen therein and for storing the liquid nitrogen therein in order to keep the measuring tank 7 in an extremely low temperature state, and liquid nitrogen or the like in the measuring tank 7. Inlet 18 for feeding in the refrigerant and a linear sample 1 are provided on the upper side of the outer casing 47 so as to be opened and closed so that the linear sample 1 can be attached and detached. The double layer of the vacuum tank 26U and the liquid nitrogen tank 27U is provided. And a lid 19 having a structure.

Next, the structure of the transport unit 40 is shown in FIG.
This will be described with reference to FIG. Here, FIG. 2 is an enlarged side cross-sectional view of the transport unit 40 (an enlarged cross-sectional view of a main part in the direction of arrow AA ′ in FIG. 1). The transport unit 40 includes the drive unit 1.
4, a sprocket gear 4 that directly rotates a rotary shaft 5B, which will be described later, by being given a driving force via a chain 20, and a rotary shaft 5A rotatably held by the first bearing 5A1 and the second bearing 5A2, A rotating shaft 5B rotatably held by a first bearing and a second bearing (not shown), first sprocket gears 21A and 21A ′ fixed to the rotating shaft 5A and rotating with the rotation of the rotating shaft 5A, and a rotating shaft. 5B
The second sprocket gear 21B (the other is not shown) fixed to the sprocket gear 21 and fixed to the sprocket gear 21.
A first chain 3 driven by A and 21B in a substantially elliptical orbit and a plurality of second clamp portions 2 ′ are fixed, and a first sprocket gear 21A ′ and a second unshown second
And a second chain 3'which is driven by a sprocket gear in a substantially elliptical orbit.

Next, the measuring terminal unit 45 will be described with reference to FIGS. Here, FIG. 3 is an enlarged cross-sectional view in the vicinity of the measurement terminal unit (enlarged cross-sectional view of the main part in the direction of arrow BB ′ of FIG. 1). The measurement terminal unit 45 includes the first bearing 10
Rotating shaft 1 rotatably held by A and the second bearing 10B
0, the cam 11 fixed to the rotary shaft 10, and the rotary shaft 10
And a sprocket gear 17 for rotating the rotating shaft 10 and the cam 11 by a driving force applied by the drive unit 14 via the chain 15 and the cam 11 via the roller 43A to contact the rotating shaft 12. A movable terminal portion 50 having an upper terminal 8 that rotates about a center is fixed to the measuring tank 7 and is connected to the measuring portion 16 via a lead wire or the like, and the linear sample 1 is sandwiched in cooperation with the upper terminal 8. The lower terminal 6 for electrically connecting the linear sample 1 to the measuring part 16
And is provided.

The movable terminal portion 50 has a vertical arm 43 for holding the roller 43A and a horizontal arm 44, and an L-shaped support 9 having an upper terminal 8 provided below the horizontal arm 44 and a horizontal arm 44. When the linear sample 1 is sandwiched between the upper terminal 8 and the lower terminal 6 by a moment generated by its own weight and detachably attached to one end of the arm by a weight fixing screw 23, the linear sample 1 is electrically connected to the measuring section 16. , And a weight 22 for mechanically fixing the linear sample 1 between the upper terminal 8 and the lower terminal 6.

In this case, one of the upper terminal 8 and the lower terminal 6 of the movable terminal portion 50 functions as a first connecting member, the other functions as a second connecting member, and the cam 11 functions as a cam member. , The weight 22 functions as a weight member,
The vertical arm 43, the horizontal arm 44, the roller 43A, and the cam 11 function as a separating unit.

As described above, the measuring terminal unit 45 is a set of two, and in FIG. 1, two sets are provided because one is used as a voltage measuring terminal group and the other is used. This is because it is used as a current measuring terminal group. The drive unit 14 includes a motor (not shown) and a gear (described later).

The measuring unit 16 is a measuring device required for performing electric resistance measurement by a four-terminal method (for example, Wheatstone bridge, double bridge), for example, a power supply for current supply and a voltage measuring device or current supply. It is configured to include a resistance measuring device in which a power supply and a voltage measuring device are integrated, and a calculation computer that performs various calculations based on the measurement results of the measuring device. (1) Basic Measurement Operation Next, the operation for measuring the electric resistance and the basic measurement operation of the electric resistance measuring device will be described with reference to FIGS. 1 to 3.

First, the lid 19 of the electric resistance measuring device is opened, and a drive switch (not shown) of the control unit 13 is turned on to operate the drive unit 14 and apply a drive force to the sprocket gear 4 via the chain 20. When the sprocket gear 4 rotates, the rotary shaft 5B rotates, and the rotary shaft 5B
The second sprocket gear 21B and the first sprocket gear 21A 'which are attached to the first sprocket gear 21A' and a second sprocket gear (not shown) that drives the second chain 3'are rotated.

The driving force of the rotating second sprocket gear 21B is transmitted to the first sprocket gear 21A via the first chain 3. Further, the driving force of the second sprocket gear (not shown) attached to the rotary shaft 5B is the second
It is transmitted to the first sprocket gear 21A 'via the chain 3'.

As a result, the first chain 3 and the second chain 3'will be driven along a substantially elliptical orbit. Along with the driving of the first chain 3 and the second chain 3 ', the clamp part composed of the first clamp part 2 and the second clamp part 2'is driven on a substantially elliptical orbit. By driving to a position suitable for mounting the linear sample 1 and stopping at the position, the linear sample 1 is fixed without slack by using both the first clamp part 2 and the second clamp part 2 ′. To do.

In FIG. 2, the first clamp portion 2
Is shown only at point C, but since it is also fixed at 5 points from point D to point H, the lid 19 is closed after fixing the linear sample to all 6 clamp parts in the same manner. . In this case, it is possible to lock the lid body 19, but when there is a possibility that the atmospheric pressure in the measurement tank 7 becomes equal to or higher than the atmospheric pressure, such as when liquid nitrogen is used as the refrigerant. , It is necessary to install a relief valve separately.

Next, the drive switch (not shown) of the control unit 13 is turned on again to operate the drive unit 14, and the drive force is applied to the sprocket gear 4 via the chain 20. The first chain 3 and the second chain 3 ′ are driven along a substantially elliptical orbit, and the first clamp part 2 and the second chain 2 to which the linear sample 1 is fixed.
The clamp portion 2'is also driven along the trajectory indicated by the alternate long and short dash line in FIGS. 3 (a) and 3 (b).

By applying a driving force to the sprocket gear 17 via the chain 15 in parallel with the driving of the sprocket gear 4, the rotary shaft 10 and the cam 11 also rotate. In this case, the linear sample 1 is transported by
It is necessary to perform it while the upper terminal 8 and the lower terminal 6 are in the open state (mechanical fixing and electrical disconnection), but as a gear (not shown) of the driving unit 14, for example, a Geneva gear (Ge
By using the neva gear, Maltese cross), the movements of the chain 15 and the chain 20 can be controlled in accordance with the above operation.

More specifically, as shown in FIG. 3 (a), the first clamp portion is provided only when the long-diameter portion of the cam 11 is in the section I to J in which the upper terminal 8 is in the open state. 2 and the second clamp part 2 ′ are configured to be driven. As a result, the vertical arm 43 of the L-shaped support tool 9 is pushed by the long diameter side of the cam 11 via the roller 43A, and the horizontal arm 44 rotates about the rotation shaft 12, so that the upper terminal 8 is removed from the drawing. As it is pushed up, the linear sample 1
It becomes a state where it can freely pass between the upper terminal 8 and the lower terminal 6.

In a state where the linear sample 1 can freely pass between the upper terminal 8 and the lower terminal 6, the first clamp portion 2
3A, the linear sample 1 is conveyed from the upper side in the figure to the left side in the figure by driving the second clamp section 2 '.

Then, at the timing when the linear sample 1 is positioned between the upper terminal 8 and the lower terminal 6, the roller 43A
Comes into contact with the short diameter part of the cam 11, and the linear sample 1
Is sandwiched between the upper terminal 8 and the lower terminal 6 and electrically connected to the measuring unit 16, and is mechanically fixed by the moment generated by the weight of the weight 22 (FIG. 3).
(B)).

At this time, the measuring section 16 measures the current or voltage between the two lower terminals 6 forming a pair, and calculates the electric resistance. Then, as the cam 11 rotates, the vertical arm 43 of the L-shaped support 9 is again moved to the cam 1.
1 is pushed through the roller 43A by the long diameter side, the horizontal arm 44 is rotated around the rotation shaft 12, and the upper terminal 8 is pushed upward in the drawing. The terminal 6 is in an open state (see FIG. 3A).

When the upper terminal 8 and the lower terminal 6 are opened, the linear sample 1 for which the measurement is completed freely passes between the upper terminal 8 and the lower terminal 6, and the linear sample 1 shown in FIG. It will be transported to the left side in the figure along the trajectory indicated by the one-dot chain line. Similarly, the upper terminal 8 of the movable terminal portion 50 is opened / closed at a constant time interval, that is, a time interval corresponding to the installation interval of the linear sample 1, by pressing a drive switch (not shown) of the control unit 13. Will be repeated.

In parallel with the opening / closing operation of the upper terminal 8, the first clamp portion 2 fixed to the point C shown in FIG. 2 is sequentially moved from point D → point E → point F → point G → point H. As a result, it is possible to continuously measure six linear samples. Similarly, the second clamp portion 2'corresponding to the first clamp portion 2 also operates in synchronization.

In this case, when the load for mechanically fixing the linear sample is changed according to the diameter of the linear sample, the weight fixing screw 23 is removed and the weight 22 is set to a different weight. You can replace it with another one. In addition, the distance between the two upper terminals 8 (or the lower terminals 6) that form a pair of electrodes,
That is, the terminal-to-terminal distance L (see FIG. 1) is assumed to be constant (for example, 50 cm or more), and the terminal-to-terminal distance L is the uniformity of the linear sample to be measured and the economical efficiency of the entire apparatus. It is necessary to set the optimum one in consideration of (because the device becomes large when the distance is increased). (2) Measurement operation at cryogenic temperature In the above basic measurement operation, the case where the measurement is performed in the atmosphere has been described.
The operation when measuring the electrical resistance at a cryogenic temperature using a refrigerant such as liquid helium will be described mainly on the points different from the basic measurement operation.

As in the case of the basic measurement operation, after fixing the linear sample to all the six clamp parts, the lid 19 is closed.
Next, vacuum suction is performed by a vacuum pump (not shown) connected to the suction port 24, and the vacuum chamber 26 is evacuated.

When the vacuum tank 26 becomes a vacuum, liquid nitrogen is fed into the liquid nitrogen tank 27 through the inlet 25. After that, the refrigerant (liquid nitrogen,
A predetermined amount of liquid helium or the like) is fed into the measuring tank 7.

Subsequently, it is confirmed that the temperature in the measuring tank 7 is sufficiently stabilized by a temperature sensor (not shown), and the drive switch (not shown) of the controller 13 is turned on.
The drive unit 14 is operated to drive the first chain 3 and the second chain 3'in a substantially elliptical orbit, and the first clamp unit 2 and the second clamp unit 2'to which the linear sample 1 is fixed are also The coolant in the measuring tank 7 is driven and conveyed along the trajectory shown by the one-dot chain line in FIG. At this time, since the linear sample 1 is in a state where it can freely pass between the upper terminal 8 and the lower terminal 6, the linear sample 1 is positioned between the upper terminal 8 and the lower terminal 6.

At the timing when the linear sample 1 is positioned between the upper terminal 8 and the lower terminal 6, the sprocket gear 1
By the rotation of 7, the roller 43A comes into contact with the short diameter portion of the cam 11, and as shown in FIG.
Is sandwiched between the upper terminal 8 and the lower terminal 6 and electrically connected to the measuring unit 16, and is mechanically fixed by the moment generated by the weight of the weight 22.

At this time, the linear sample 1 is in thermal equilibrium with the refrigerant due to being conveyed through the refrigerant, and the measuring unit 1
6 measures the current or voltage between two lower terminals 6 forming a pair, and calculates the electrical resistance of the linear sample 1 at an extremely low temperature. Then, as the cam 11 rotates, the vertical arm 43 of the L-shaped support 9 is again moved.
Is pushed by the long diameter side of the roller 43A via the roller 43A,
The horizontal arm 44 rotates about 2 to move the upper terminal 8
Is pushed upward in the drawing, and the upper terminal 8 and the lower terminal 6 are in an open state (see FIG. 3A).

When the upper terminal 8 and the lower terminal 6 are in the open state, the linear sample 1 for which the measurement is completed freely passes between the upper terminal 8 and the lower terminal 6, and is indicated by a chain line in the figure. It will be transported to the left side in the figure along the trajectory shown by. For example, when the measurement of the linear sample 1 at the G point is completed, the linear sample 1 at the G point is transported to the H point, and at the same time, the linear sample at the H point is moved to the C point and C The linear sample at the point is D
Point, the linear sample at point D is transported to point E, the linear sample at point E is transported to point F, the linear sample at point F is transported to point G. The measuring unit 16 will perform the measurement.

In the same manner, the operations are repeated in the same manner as transport → measurement → transport → measurement → ..., and the measurement is continuously performed on all (six) linear samples. In the above description, as a drive force transmission mechanism to each part,
Chains 3, 3 ', 15, 20 and sprocket gear 1
7, 21A, 21A ', and 21B are used to accurately convey a linear sample to be measured to a measurement position (between the upper terminal 8 and the lower terminal 6) in a wide temperature range including a cryogenic environment. , A transmission mechanism that uses frictional force such as a belt cannot be used because it lacks stability, and a transmission mechanism that requires a strict clearance like a normal gear mechanism has a wide range. This is because it cannot be applied to all temperature ranges.

A cam mechanism is used as a mechanism for driving the upper terminal 8 because the mechanism is simple and can reliably operate in a wide temperature range from extremely low temperature to room temperature. is there. In the above embodiment, only the measurement in a cryogenic environment using a refrigerant has been described. However, the measurement tank 7 may be filled with oil or another non-conductive solution, or a heating device such as a heater may be provided for heating conditions. It is also possible to measure below.

As described above, according to the above embodiment, the clamp parts (first clamp part 2 and second clamp part 2 ') move on the substantially elliptical orbit shown in FIG. By opening 19 the linear sample to be measured can be easily mounted.

Further, by increasing the number of clamp parts, it is possible to mount a large number of samples without changing the volume of the entire electric resistance measuring device. Further, by not immersing the whole of the measuring tank 7 with the refrigerant or the oil, but immersing only the vicinity of the measuring unit 45 in the refrigerant, the oil, or the like, the measurement itself is performed under a desired atmosphere, It is also possible to attach / detach the sample in the atmosphere.

In the above description of the embodiment, the case of measuring the electric resistance is described. However, the measuring system of the measuring section 16 and the measuring terminal unit 45 are changed to corresponding ones, and the temperature range to be held is further changed. By providing a necessary configuration such as a temperature control device capable of changing the temperature, other electrical devices such as a conductivity measuring device for measuring the conductivity and a purity measuring device for measuring the purity of the material based on the electric resistance. It can be configured as a characteristic measuring device.

Further, a transmission system (chains 15, 20, sprocket gears 4, 1) for transmitting the driving force of the drive unit 14
It is needless to say that the arrangement of (7 etc.) is an example, and that other arrangement within the scope of those objects is merely a design modification and belongs to the scope of the present invention. .

[0054]

According to the first aspect of the present invention, each clamp means fixes and holds the linear sample at two points separated by a predetermined distance, and the transport means each clamp holds the linear sample. The means are sequentially transported to a predetermined measurement position, and each fixed connection means is configured such that at least the linear sample held by the clamp means transported to the predetermined position is measured by the measurement means,
The mechanical characteristics are fixed mechanically at two points separated by a predetermined distance and electrically connected to the measuring means, and the measuring means measures the electrical characteristics of the linear sample. Can be measured continuously. Therefore, the measurement time of the electrical characteristics such as the electric resistance can be significantly reduced, and the measurement cost can be reduced. Moreover, since continuous measurement is possible, the measurement operation can be performed at a distant position, and the measurement can be performed safely.

According to the second aspect of the present invention, in addition to the function of the first aspect of the invention, the fixed connecting means is provided for the mechanical fixing and measuring means while the conveying means conveys the clamping means. Since the electrical connection is temporarily released, the linear sample can be easily transported except during measurement, and continuous measurement can be performed easily and automatically. .

According to the invention of claim 3, in addition to the operation of the invention of claim 1 or 2, the drive means of the conveying means drives the chain having the clamp means fixed at a predetermined position. Since the clamp means is transported on the annular orbit, the clamp means can be reliably transported in a wide temperature range from extremely low temperature to room temperature. Also,
Since the linear sample is transported on the circular orbit, a plurality of linear samples can be efficiently stored, and the entire electrical characteristic measuring device can be made compact.

According to the invention described in claim 4, in addition to the function of the invention described in any one of claims 1 to 3, the first connecting member and the second connecting member constituting the fixed connecting means are: The linear sample is clamped cooperatively by abutting the linear sample at a predetermined distance apart from each other so as to be mechanically fixed and electrically connected to the measuring means, and the weight member is the first member. A load for mechanically fixing the linear sample by its own weight to the first connecting member and the second connecting member when the connecting member and the second connecting member hold the linear sample. And the separating means separates the first connecting member and the second connecting member against the load of the weight member based on the conveyance state of the clamp means in the conveying means by the cam member, so that the line is surely applied during measurement. Sample can be fixed and transported Can easily carry the linear samples, the reduction of securing the measurement time certainty of measurement can be easily compatible in.

According to the invention of claim 5, in addition to the effect of the invention of any one of claims 1 to 4, the measuring tank is the object to be measured at least during the measurement by the measuring means. Since the linear sample and the fixed connection means are kept at a cryogenic temperature or in an arbitrary atmosphere, it is possible to carry out continuous measurement while holding a plurality of linear samples in a cryogenic state or in an arbitrary atmosphere. It is possible to obtain and compare the measurement results of a plurality of linear samples under the same measurement conditions. Therefore,
For example, it can greatly contribute to the measurement of the electric resistance of the superconducting substance in an extremely low temperature state, particularly the measurement of the electric resistance when the superconducting substance has a practical linear shape. In addition, even in a measurement involving a danger such as an extremely low temperature in which a measurement tank is filled with a refrigerant or the like, the measurement can be performed at a remote position, and the measurement can be performed safely.

[Brief description of the drawings]

FIG. 1 is a front sectional view of an electric resistance measuring device according to an embodiment.

FIG. 2 is an enlarged cross-sectional view of a main part of FIG.

FIG. 3 is an enlarged cross-sectional view of a main part of FIG. 1 taken along the line BB ′.

[Explanation of symbols]

 1 linear sample 2 first clamp part 2'second clamp part 3 first chain 3'second chain 4 sprocket gear 5A rotating shaft 5B rotating shaft 5A1 first bearing 5A2 second bearing 6 lower terminal 7 measuring tank 8 upper Terminal 9 L-shaped support 10A 1st bearing 10B 2nd bearing 10 Rotating shaft 11 Cam 12 Rotating shaft 13 Control part 14 Drive part 15 Chain 16 Measuring part 17 Sprocket gear 18 Inlet port 19 Lid body 20 Chain 21A 1st sprocket Gear 21A 'First sprocket gear 21B Second sprocket gear 22 Weight 23 Weight fixing screw 24 Suction port 25 Inlet 26 Vacuum tank 26U Vacuum tank 27 Liquid nitrogen tank 27U Liquid nitrogen tank 30 Main body 40 Transfer unit 43 Vertical arm 43A Roller 44 Horizontal Arm 45 Measuring terminal unit 47 External housing 50 Movable end Part L distance between the terminals

Claims (5)

[Claims] 1. A plurality of clamp means for fixing and holding a linear sample at two points separated by a predetermined distance, a conveying means for sequentially conveying the clamp means to a predetermined measurement position, and an electric characteristic of the linear sample. The measuring means for measuring and the linear sample held by the clamp means conveyed to the predetermined measuring position are mechanically fixed at two points separated by a predetermined distance at least during the measurement period and electrically connected to the measuring means. An electrical characteristic measuring device, comprising: two fixed connecting means for electrically connecting to each other; 2. The electrical characteristic measuring device according to claim 1, wherein the fixed connection means releases the mechanical fixing and the electrical connection to the measuring means while the conveying means conveys the clamp means. An electrical characteristic measuring device characterized by: 3. The electrical characteristic measuring device according to claim 1, wherein the conveying unit drives the chain, and a chain formed in an annular shape in which the clamp unit is fixed at a predetermined position. Drive means for conveying the clamp means by means of: 4. The electrical characteristic measuring device according to claim 1, wherein each of the fixed connection means abuts on the linear sample to cooperate with the linear sample. A first connecting member and a second connecting member which are sandwiched and at least one of which functions as a terminal for electrically connecting a linear sample to the measuring means;
When the first connecting member and the second connecting member hold the linear sample, the linear sample is mechanically fixed to the first connecting member and the second connecting member by its own weight. Has a weight member for applying a load to prevent the weight of the weight member from being applied to the first connecting member and the second connecting member based on the carrying state of the clamping means in the carrying means. An electrical characteristic measuring device comprising: 5. The electric characteristic measuring device according to claim 1, wherein at least during measurement by the measuring means, the linear sample to be measured and the fixed connecting means are poled. An electrical characteristic measuring device comprising a measuring tank for holding at a low temperature or in an arbitrary atmosphere.