JPH02205719A - Detecting-system supporting and driving mechanism - Google Patents

Abstract

PURPOSE:To make quickly the positioning with a detecting system, to reduce the amount of driving, to shorten the required measuring time and to improve measuring accuracy by correcting an error which is caused by the fact that a measuring point and the detector are not arranged in predetermined positional relationship. CONSTITUTION:A detecting system 1 is attached so that the head of a detector 11 has the specified direction with respect to a wall 5 of an environment device. An environment device 2 houses the detector 11. The environment device 2 has the wall surface of the environment device which is commonly used and picks up a plurality of data all together. Adjustment is performed so that the detector 11 corresponding to each measuring point of a material to be measured 4 has the predetermined positional relationship. Then the shape of the material to be measured is measured. The achievement of the predetermined positional relationship is found with the detecting system 1. The shape of the material to be measured 4 is found based on the amount of movement up to now. The data with regard to the shape of the material to be measured 4 are obtained. An error which is caused by the fact that the measuring point and the material to be measured 4 are not in the predetermined positional relationship is corrected based on said data. In this way, the positioning can performed quickly, and the measuring accuracy can be improved.

Description

Detailed Description of the Invention (A) Technical field This invention consists of a plurality of detectors and an environmental device necessary to realize and maintain an environment in which they operate, and The present invention relates to a device for detecting point information.

Here, a detector is a detector that requires some kind of special environment, such as being kept at low temperature, high pressure, or maintained at high temperature and low pressure.

For example, a quantum interference device (SQU) that requires a superconducting state
ID) etc. This must be cooled, for example with liquid helium. If a high-temperature oxide superelectric body could be used as the detector material, it would be possible to cool it with liquid nitrogen.

A device for realizing and maintaining a special environment in this way is referred to as an environmental device here.

Assume that the object to be measured is a living body or the like and cannot be placed in this environment. Therefore, the object to be measured is outside the environmental device. Only the detector is in the environmental equipment.

Furthermore, there are multiple measurement points on the surface of the object to be measured, and it is desired to use multiple detectors at the same time to obtain information on all of the measurement points at once. This is the purpose of the present invention.

(a) Prior art When a detector is located inside an environmental device and an object to be measured is located outside the environmental device, a conventional measuring device has been a type of clothing.

Conventional device I (a) 4j! The number of output devices is one, or multiple devices are grouped together in one flr location. There was actually one piece.

(b) An environmental device surrounds the detector.

(C) The environmental device containing the detector is a moving table or
Attached to a universal joint. In some cases, the object-to-be-measured mounting table is attached to a moving table.

(d) Prior to measurement, move the environmental device and check the relative positional relationship between the object to be measured and the environmental device. i. A detector is placed facing each measurement point of the object at a constant interval and direction.

(e) Perform measurements.

At another measurement point, perform (d) and perform the next measurement.

Such a device has already been produced as a practical device and is widely applied.

Conventional device I+ (a) A number of detectors corresponding to the measurement points of the object to be measured are prepared and arranged in a predetermined direction at the position to be measured. All the multiple detectors are independent. They can be moved independently and fixed independently.

(b) Cover the entire detection system with an environmental device.

(C) Bring the environmental device containing the detection system close to the object to be measured, and after confirming that it is in the specified position, perform the measurement.

This device is still in the proposal stage and has not yet been put into practical use. This is because it is difficult to independently move and independently fix the many detectors in an environmental device.

(1) Problems to be Solved by the Invention An environmental device includes a detector. The head of the detector and the object to be measured are separated by at least the thickness of the environmental device.

In order to obtain accurate measurement values for measurement points on the object to be measured, it is desirable to bring the outer wall of the environmental device as close as possible to the object to be measured.

Conventional device I can realize the optimal positional relationship between the measurement point of the object to be measured and the detector. There are some shortcomings here and there.

One is that a complex drive mechanism and long adjustment time are required to achieve the optimal positional relationship.

Another problem is that there are directions in which the environmental device cannot realize or maintain a unique environment. For this reason, blind spots are created in the object to be measured, resulting in points that cannot be measured.

Of course, the simpler the drive mechanism and the shorter the adjustment time, the better. Also, there should be no blind spots.

Since the conventional device 11 has an independent detector, it is easy to set the positional relationship. You can also eliminate blind spots. but,
On the other hand, there are the following difficulties.

The shape of the object to be measured and the shape of the environmental device must correspond. Therefore, if the object to be measured has an arbitrary shape and dimensions, an environmental device is required for each object to be measured. This means that environmental devices of many shapes and sizes are required.

Alternatively, it is necessary to limit the environment that can be realized and to make the wall surface of the environmental device variable. However, it is not easy to make the wall surface variable.

Alternatively, it is not impossible to use one common environmental device that is the greatest common divisor.

However, in this case, individual detectors and measurement points do not necessarily correspond accurately, resulting in inaccurate measurements.

(1) Configuration The mechanism of the present invention includes a plurality of detectors. A support drive mechanism is provided to make the plurality of detectors correspond to the plurality of measurement points.

Additionally, an array of multiple detectors is provided. The detection system detects that multiple detectors correspond to multiple objects. After or before this, measurements are taken.

Furthermore, a calculation device and a position detection mechanism are provided.

The position detection mechanism determines the positional relationship between the detection system and the object to be measured during measurement.

After the measurement, the arithmetic device corrects the measured value based on the positional relationship information.

These are for correcting errors caused by the fact that the object to be measured and the detector are not in a predetermined positional relationship during measurement.

The configuration of the detection system support and drive mechanism of the present invention is listed below.

A detection system consisting of multiple detectors corresponding to the measurement points of the object to be measured, an environmental device that realizes and maintains the environment necessary to operate the detection system, and an environment device that supports the environment device that houses the detection system and supports the object to be measured. A support drive mechanism that adjusts each measurement point of an object and a corresponding detector so that they have a predetermined positional relationship, a position detection mechanism, and a position detection mechanism that detects when the detector has reached a predetermined positional relationship with the object It consists of a detection system in which a detector is arranged corresponding to each measurement point, and a processing unit, and the system is configured to detect a detection system corresponding to each measurement point of the object to be measured before or after measurement at each measurement point. Adjusting the detector so that it has a predetermined positional relationship, measuring the shape of the object to be measured, and based on this, correcting errors that occur because the measuring point and the detector are not in the predetermined positional relationship. shall be.

This will be explained using drawings.

FIGS. 1 and 2 are schematic cross-sectional views showing an example of the vicinity of one measurement point.

The object to be measured has many measurement points, and the detection system accordingly has many detectors. The support and drive mechanism supports and drives all the detectors, but since only the vicinity of one detector is shown here, the support and drive mechanism is not shown in the figure.

The detection system 1 has a plurality of detectors 11. The detector is supported and driven by a support drive mechanism.

An environmental device 2 surrounds all the detectors.

The environmental device 2 has a space surrounded by an environmental device wall 5 filled with, for example, a refrigerant 6. This may be to prepare an environment in which the detector can function, or may be an environment at low temperature, high temperature, vacuum, or even high pressure. Since it is partitioned by the environmental device wall 5, any environment can be provided.

The object to be measured 4 is, for example, a part of the human body.

The environmental device 2 does not have a shape that corresponds to the shape of each individual object 4 to be measured, but can be adapted to an object to be measured having an arbitrary size and shape.

The detection system 3 is provided outside the environmental device wall 5.

The detection system 3 includes an upper cover 7, an optical fiber 9, compressed air 8, and the like.

The upper covering 7 is made of a material with a certain degree of rigidity and flexibility. A space of a certain width is created between the environmental device wall 5 and compressed air 8 and an optical fiber 9 are placed in this space.

In front of the detector 11, the optical fiber 9
exists. The micro loop detects the pressure applied to the upper coating 7 by causing a micro bending loss change.

One end of the optical fiber passes light from a light source such as a light emitting diode or a laser diode.

A light receiving element is provided at the other end to detect the amount of light passing through the optical fiber.

If pressure is applied to the upper coating 7, the minute loop 10 of the optical fiber will bend. Then, the amount of transmitted light changes due to the change in microbending loss. This indicates that pressure has been applied. Micro loop and detector 1
1 are located at the same point, it means that the detector 11 and the object to be measured 4 overlap at this time.

This is one example of the detection system 3.

The example shown in Figure 2 uses a light detector.

The detection system 3 includes a cover 17 with a reflective surface and an optical fiber 19.
, an optical fiber support section 18, and the like.

The reflective surface cover 17 is made of a material with a certain degree of rigidity and flexibility. A space of a certain width is created between the environmental device wall 15 and the optical fiber 19 and the optical fiber support section 18 are placed in this space.

Since the cover 17 with a reflective surface has a certain degree of rigidity and contains air 23, it can maintain its original shape unless external force is applied.

A resin film 22 is lined inside the cover 17 with a reflective surface.

Just in front of the detector 11, the optical fiber 19 curves forward and has an obliquely polished surface 20 at its end.

The obliquely polished surface is used to detect the pressure applied to the cover 17 with a reflective surface by changing the reflection conditions.

The optical fiber support part 18 is a block member fixed to the environmental device wall 15, and is a member for directing the obliquely polished surface 20 of the optical fiber toward the cover 17 with a reflective surface.

The starting end of the optical fiber is branched into two, and one end passes light from a light source such as a light emitting diode or a laser diode.

A light receiving element is provided at the other end of the branch.

The light entering from one end of the optical fiber reaches the diagonally polished surface 2 at the tip.
0, is reflected by the reflective surface cover 17, and part of the light returns to the optical fiber and enters the other end of the branch.

The light receiving element detects the amount of returned light.

If pressure is applied to the cover 17 with a reflective surface in front of the detector, the reflective surface in front of the obliquely polished surface 20 at the end of the optical fiber approaches. Then, the reflection conditions change. Since the obliquely polished surface 20 and the reflective surface become closer, the amount of reflected light increases.

This indicates that pressure has been applied. Since the obliquely polished surface 20 and the detector 11 are located at the same point, the detector 11 and the object to be measured 4 overlap at this time.

This is another example of the detection system 3. In the present invention,
Measurements are not made after a certain positional relationship has been achieved. It can be measured in any positional relationship. Once measured, it is corrected.

Although not shown in the diagram, in addition to these, there is also an arithmetic processing unit,
There is a position detection mechanism. The position detection mechanism detects the positional relationship between each measurement point of the object to be measured and the detector during measurement.

The arithmetic processing device corrects the measured value based on this positional relationship.

(E) Effect In the detection system 1, the head of the detector 11 is attached to the environmental device wall 5 so as to form a predetermined direction.

The environmental device 2 incorporates the detector 11, as already mentioned. The environmental device has a commonly used environmental device wall surface, and can collect a plurality of pieces of information at once.

Before or after measurement, the shape of the object is measured by adjusting each measuring point of the object and the corresponding detector to have a predetermined positional relationship.

The word detection system can tell that a predetermined positional relationship has been reached. The shape of the object to be measured can be determined by the amount of movement until this point occurs.

In this way, information regarding the shape of the object to be measured can be obtained.

Based on this information about the shape of the object to be measured, the measurement points are
Corrects errors caused by objects being measured that are not in a predetermined positional relationship.

Of course, it is assumed that the relationship between the deviation from the determined positional relationship and the error is known in advance.

According to the present invention, positioning by the detection system can be performed quickly and the amount of driving can be reduced, so that the time required for measurement can be shortened. Furthermore, measurement accuracy is improved.

(Power) Example of implementation An example will be described.

A quantum interference device (SQUID) is assumed as a detector, and a living body, particularly a magnetic brain, is assumed as a measurement object. The object to be measured is the brain.

Magnetoencephalography is measured at over 100 points on the head for diagnostic and observation purposes.

Environmental equipment needs to meet the following requirements: (a) It must be able to maintain extremely low temperatures to maintain superconducting state, and (b) It must be made of materials that are difficult to magnetize to reduce noise.

Therefore, the environmental device usually has a dewar structure made of fiber-reinforced plastic (FPC) with vacuum insulation, double structure, etc. The thickness of the environmental device is typically several centimeters
There are m. Inside the environmental equipment, as a refrigerant, liquid or
If it contains gaseous He and therefore liquid, the environmental device cannot be turned upwards.

Furthermore, since the FPC has high rigidity, it is difficult to deform the wall surface of the environmental device.

The environmental device is in the form of a helmet that covers the head, and is shaped to accommodate heads of various shapes and sizes.

The detection coil of the 5QUID, which is a detector, is attached at a predetermined angle to the wall of this environmental device.

Since the helmet-shaped environmental device or a part of it is filled with a refrigerant such as liquid or gaseous He,
The detection system including the 5QUID body is maintained in a superconducting state.

A helmet-like environmental device is attached to a predetermined position on the head, and -
Collect information collectively.

Before or after the measurement, each measurement point and the corresponding detector are adjusted so that they have a predetermined positional relationship, and the shape of the head is measured.

Based on this information regarding the shape of the head, errors due to influences such as deviations in measurement intervals, tilt of the detector, etc. caused by the fact that the measurement point and the detector are not in a predetermined positional relationship are corrected.

(g) Effect: A detection system consisting of multiple detectors corresponding to multiple measurement points of the object to be measured, an environmental device that accommodates the detection system and realizes and maintains an environment in which it operates, and the object to be measured. It has the effect of being comprised of a support drive mechanism and a position detection mechanism that can obtain shape information of the object, and a detection system that detects that the detector is in a predetermined positional relationship with the object to be measured.

(1) Can handle objects of any size and shape.

(2) The support drive mechanism of the environmental device can be simplified.

(3) The time required for measurement can be shortened.

(4) Errors associated with measurement can be reduced.

[Brief explanation of the drawing]

FIG. 1 is a schematic sectional view showing a part of the support drive mechanism of the present invention. FIG. 2 is a schematic sectional view showing a part of a support drive mechanism according to another example of the present invention. 1 ・ ・ ・ 2 ・ ・ ・ 3 ・ 1 4 ・ 1 5 ・ ・ ・ Fist detection system/environment equipment 0 detection system Φ measurement/environment equipment wall ornament 6 ・ 1 7 ・ ・ ・ 8 ・ 1 9・ ・ ・ 10 ・ ・ 11 ・ ・ 18 ・ ・ 19 ・ ・ 20 ・ ・ 22 ・ ・ Inventor

Claims (1)

[Claims] A detection system consisting of multiple detectors that correspond to the measurement points of the object to be measured, an environmental device that realizes and maintains the environment necessary to operate the detection system, and an environmental device that supports and supports the environment device that houses the detection system. A support drive mechanism that adjusts each measurement point of the object to be measured and the corresponding detector to have a predetermined positional relationship; a position detection mechanism; It consists of a detection system in which an array of detectors for detection is arranged corresponding to the measurement points, and a processing unit, and the detection system corresponds to each measurement point of the object to be measured before or after measurement at each measurement point. Adjust the instrument so that it has a predetermined positional relationship, measure the shape of the object, and use this to correct errors that occur because the measuring point and detector are not in the predetermined positional relationship. Features a detection system support drive mechanism.