DE102015208702A1 - Collision detection device, medical device and method for operating a medical device - Google Patents

Abstract

The invention specifies a collision detection device for a medical device. The device has a surface-trained tactile sensor (1), which is designed to detect a contact of the medical device with an object and a two-dimensional proximity sensor (2), which is designed to detect an approximation of the object, wherein the tactile Sensor (1) and the proximity sensor (2) are at least partially fabric-like. A medical device with such a collision detection device as well as a method for operating a medical device with such a collision detection device are also provided. The invention offers the advantage that both approximations of an object as well as contacts with an object can be detected safely and robustly.

Description

Field of the invention

The invention relates to a collision detection device for a medical device, a medical device having a collision detection device and a method for operating a medical device having a collision detection device, wherein two different collision detection methods are used.

Background of the invention

Medical devices, in particular those with at least one moving component, carry the risk that components of the medical device collide with one another or even that persons or objects undesirably come into contact with components. Therefore, it has already been proposed in the prior art to use for personal and machine protection collision detection devices that can detect a contact of a part of the medical device with other components of the medical device or a person. Such a dangerous situation is detected in an evaluation device of the medical device and provides for appropriate measures, such as stopping a movement of a movable component of the medical device and / or the issue of warnings.

Another requirement in the field of medical devices is the robustness and disinfectability of contact parts, which are also valid for collision detection devices.

Many known in the art collision detection devices for force, collision and / or pressure measurement record measured values only selectively and spatially limited, for example in the case of a load cell or a conventional pressure sensor. Although collision detection devices for surface detection have become known in principle, for example safety mats used in safety technology and tactile floors for detecting whether, for example, older people are on the floor, but the presented sensor principles do not meet the present in medical devices additional requirements, in particular to the disinfectability and the robustness.

By way of example, the published patent application US 2010/0061509 A1 a generic collision detection device according to the prior art described.

Summary of the invention

It is an object of the invention to provide a further collision detection device, a further medical device with a collision detection device and a further method for operating a medical device with a collision detection device that detect collisions with objects robustly and safely in everyday clinical practice.

According to the invention, the stated object is achieved with the collision detection device, the medical device and the method for operating a medical device of the independent patent claims. Advantageous developments are specified in the dependent claims.

According to the invention, the device consists of a planar proximity sensor and a planar tactile sensor, which are arranged parallel to one another (sandwich structure) and therefore can detect both the approximation of an object and a contact with the object. The two sensors are at least partially fabric-like, whereby the sensors are very sensitive and mobile.

Tactile sensors are modeled on the human sense of touch. They serve to receive and recognize information through mechanical contact with objects. Proximity sensors are assigned to the class of non-tactile sensors and are used to locate objects at a specific, predeterminable distance.

The invention claims a collision detection device for a medical device, for example a mobile C-arm X-ray device, having a flat tactile sensor which detects a contact of the medical device with an object, and a planar proximity sensor which detects an approximation of the object. wherein the tactile sensor and the proximity sensor are at least partially fabric-like.

By combining a tactile sensor with a proximity sensor, it is possible to detect the approach of an object. The fabric-like sensor structure allows a flexible and sensitive construction.

In one development of the invention, the tactile sensor and the proximity sensor can each be constructed in a multilayered manner. Due to the multi-layered design, both sensors can share components cost-effectively.

In a further embodiment, the tactile sensor can be designed as a resistive sensor and the proximity sensor as a capacitive sensor. As a result, different physical principles of object recognition are used.

In a further embodiment, the device comprises a crumpling layer which provides a follow-up path, a conductive, textile first sensor layer, a conductive, textile second sensor layer, a conductive, textile third sensor layer, a first separation layer, which electrically isolates the first and the second sensor layer from one another , a second separation layer electrically insulating the second and third sensor layers from each other, and a surface layer above the third sensor layer, wherein the first separation layer, the first sensor layer, and the second sensor layer constitute the tactile sensor, and wherein the second separation layer is the second Sensor layer and the third sensor layer form the proximity sensor.

In one development, the device has a crumple layer that provides a follow-up path, a conductive, textile first sensor layer, a conductive, textile second sensor layer, a first separation layer, which electrically isolates the first and second sensor layers from each other, and a surface layer above the second sensor layer on, wherein the first sensor layer, the second sensor layer and the first separation layer at the same time form the tactile sensor and the proximity sensor. With the help of this structure, a sensor layer can be saved.

In a development, the surface layer may be formed as a seamless surface, in particular as a spray coating. As a result, even complex surface structures can be protected.

Furthermore, the collision detection device can have at least one housing shell assigned to the medical device (also called a cover).

In one development, the tactile sensor, the proximity sensor, the crumple layer and the surface layer can at least partially form the housing shell.

In a further embodiment, the tactile sensor, the proximity sensor, the crumple layer and the surface layer may be arranged in the housing shell.

In one development, the tactile sensor, the proximity sensor, the crumple layer and the surface layer can be arranged on the housing shell.

In a further embodiment, the proximity sensor and / or the tactile sensor can additionally be designed as a switching sensor for controlling and operating the medical device. This allows functions of the medical device to be controlled and operated.

In another embodiment, the tactile sensor and / or the proximity sensor may be subdivided into sections that locally resolve a touch or proximity. This makes it possible to accurately locate the location of a touch or approximation.

The invention also claims a medical device with a collision detection device according to the invention. These may preferably be X-ray imaging devices or patient couches.

The invention also claims a method for operating a movable medical device with a collision detection device according to the invention, wherein a movement of the medical device is stopped when the tactile sensor detects a contact with the object and / or the proximity sensor detects an approximation of the object within a predeterminable distance , The invention offers the advantage that a serious collision can be avoided under all operating circumstances.

Other features and advantages of the invention will become apparent from the following explanations of an embodiment with reference to schematic drawings.

Show it:

1 FIG. 2: a sectional view through a collision detection device, FIG.

2 FIG. 2: a sectional view through a further collision detection device, FIG.

3 a circuit diagram of a collision detection device and

4 : a spatial view of a housing shell.

Detailed description of an embodiment

1 shows the structure of a collision detection device of a medical device based on a cross section through the sensors of the collision detection device. On a crumple layer 6 , which ensures a tracking path upon contact of the medical device with an object, is a tissue-like, conductive first sensor layer 3 , an electrically insulating first separation layer 7 and a conductive, web-like second sensor layer 4 , They form a planar tactile sensor 1 in a sandwich-like structure. The first separation layer 7 For example, is made of foam and has openings, through which the first and the second sensor layer 3 . 4 at a compression of the first separation layer 7 can touch, whereby an electrical contact is formed, which can be detected.

Above the second sensor layer 4 sits an electrically insulating second separation layer 8th on which a conductive, fabric-like, planar third sensor layer 5 is arranged. The second sensor layer 4 forms together with the second separation layer 8th and the third sensor layer 5 a flat proximity sensor 2 , In this case, the second sensor layer form 4 , the second separating layer 8th and the third sensor layer 5 as a capacitor. The second separation layer 8th forms the dielectric of the capacitor. Objects that are the proximity sensor 2 approach, the capacitance of the capacitor changes, which can be detected.

To protect the sensors 1 and 2 is a surface layer 9 arranged outside, which are the sensors 1 and 2 Protects against external influences and can be easily and sterile cleaned in clinical routine. Preferably, the surface layer is 9 a spray coating made of plastic, which can easily be applied three-dimensionally. Alternatively, the surface layer 9 also be a padding.

2 shows the structure of another collision detection device of a medical device based on a cross section through the sensors of the collision detection device. On a crumple layer 6 , which ensures a follow-up path upon contact of the medical device with an object, there is a tissue-like, conductive, areally formed first sensor layer 3 , an electrically insulating first separation layer 7 and a conductive, web-like, sheet-formed second sensor layer 4 , They form a planar tactile sensor 1 and a planar proximity sensor 2 in a sandwich-like structure. The first separation layer 7 For example, is made of foam and has openings, through which the first and the second sensor layer 3 . 4 at a compression of the first separation layer 7 can touch, whereby an electrical contact is formed, which can be detected.

The first sensor layer 3 , the first separating layer 7 and the second sensor layer 4 also form a capacitor. The first separation layer 7 forms the dielectric of the capacitor. Objects that are the proximity sensor 2 approach, the capacitance of the capacitor changes, which can be detected.

To protect the sensors 1 and 2 is a surface layer 9 arranged outside, which are the sensors 1 and 2 Protects against external influences and can be easily cleaned. Preferably, the surface layer is 9 a spray coating made of plastic, which can easily be applied three-dimensionally. Alternatively, the surface layer 9 also be a padding.

The sensors 1 and or 2 of the 1 or 2 can also be divided into sections / fields, so that the location of a touch or approximation can be detected. In addition, the sensors can 1 and or 2 be designed as a shift sensors by a touch or approximation can trigger a switching operation in the medical device.

3 shows a circuit diagram of the collision detection device after 1 or 2 , The tactile sensor 1 and the proximity sensor 2 are electrical with a computing and evaluation unit 11 connected. The tactile sensor 1 is, for example, resistive. A change in resistance can be made by the computing and evaluation unit 11 be recorded. The proximity sensor 2 For example, it can be capacitive. The approximation of an object alters the capacitance of the proximity sensor 2 , what of the computing and evaluation unit 11 is detected. The computing and evaluation unit 11 may then stop the movement of the medical device or a portion of the medical device upon detecting an approximation of an object or a touch by an object. Additionally or alternatively, a warning signal can be output.

4 shows a three-dimensional view of a housing shell 10 a medical device in which a collision detection device according to 1 or 2 is integrated. On the housing shell 10 there is a sprayed surface layer 9 , With such a structure not only planar but also simple spatial structures can be formed.

Although the invention has been further illustrated and described in detail by the embodiments, the invention is not limited by the disclosed examples, and other variations can be derived therefrom by those skilled in the art without departing from the scope of the invention.

LIST OF REFERENCE NUMBERS

1

tactile sensor

2

Proximity sensor

3

first sensor layer

4

second sensorschict

5

third sensor layer

6

Knautschschicht

7

first separation layer

8th

second separating layer

9

surface layer

10

shell

11

Calculating and evaluation unit

QUOTES INCLUDE IN THE DESCRIPTION

This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Cited patent literature

• US 2010/0061509 A1 [0005]

Claims (14)

Collision detection device for a medical device, characterized by: - a surface-trained tactile sensor ( 1 ), which is designed to detect a contact of the medical device with an object, and - a flat-shaped proximity sensor ( 2 ), which is designed to detect an approximation of the object, - wherein the tactile sensor ( 1 ) and the proximity sensor ( 2 ) are formed at least partially tissue-like. Collision detection device according to claim 1, characterized in that the tactile sensor ( 1 ) and the proximity sensor ( 2 ) are each constructed in multiple layers. Collision detection device according to claim 1 or 2, characterized in that - the tactile sensor ( 1 ) is designed as a resistive sensor and - the proximity sensor ( 2 ) is formed as a capacitive sensor. Collision detection device according to one of the preceding claims, characterized by: - a crumple layer ( 6 ), which is designed to provide a follow-up path, - an electrically conductive, textile first sensor layer ( 3 ), - an electrically conductive, textile second sensor layer ( 4 ), - an electrically conductive, textile third sensor layer ( 5 ), - a first separating layer ( 7 ), which is formed, the first and the second sensor layer ( 3 . 4 ) to isolate each other electrically, - a second separating layer ( 8th ), which is formed, the second and the third sensor layer ( 4 . 5 ) to electrically isolate each other, and - a surface layer ( 9 ) above the third sensor layer ( 5 ), - wherein the first separating layer ( 7 ), the first sensor layer ( 3 ) and the second sensor layer ( 4 ) the tactile sensor ( 1 ), and - wherein the second separating layer ( 8th ), the second sensor layer ( 4 ) and the third sensor layer ( 5 ) the proximity sensor ( 2 ) form. Collision detection device according to one of claims 1 to 3, characterized by: - a crumple layer ( 6 ), which is designed to provide a follow-up path, - an electrically conductive, textile first sensor layer ( 3 ), - an electrically conductive, textile second sensor layer ( 4 ), - a first separating layer ( 7 ), which is formed, the first and the second sensor layer ( 3 . 4 ) to electrically isolate each other, and - a surface layer ( 9 ) above the second sensor layer ( 4 ), - wherein the first separating layer ( 7 ), the first sensor layer ( 3 ) and the second sensor layer ( 4 ) both the tactile sensor ( 1 ) as well as the proximity sensor ( 2 ) form. Collision detection device according to claim 4 or 5, characterized in that the surface layer ( 9 ) is formed as a seamless surface. Collision detection device according to one of claims 3 to 6, characterized by: - at least one housing assigned to the medical device ( 10 ). Collision detection device according to claim 7, characterized in that the tactile sensor ( 1 ), the proximity sensor ( 2 ), the crumple layer ( 6 ) and the surface layer ( 9 ) at least partially the housing shell ( 10 ) form. Collision detection device according to claim 7, characterized in that the tactile sensor ( 1 ), the proximity sensor ( 2 ), the crumple layer ( 6 ) and the surface layer ( 9 ) in the housing shell ( 10 ) are arranged. Collision detection device according to claim 7, characterized in that the tactile sensor ( 1 ), the proximity sensor ( 2 ), the crumple layer ( 6 ) and the surface layer ( 9 ) on the housing shell ( 10 ) are arranged. Collision detection device according to one of the preceding claims, characterized in that the proximity sensor ( 2 ) and / or the tactile sensor ( 1 ) are additionally designed as a switching sensor for controlling and operating the medical device. Collision detection device according to one of the preceding claims, characterized in that the tactile sensor ( 1 ) and / or the proximity sensor ( 2 ) are divided into sections which are adapted to dissolve a touch or proximity locally. Medical device with a collision detection device according to one of the preceding claims. Method for operating a movable medical device with a collision detection device according to one of claims 1 to 12, characterized in that a movement of the medical device is stopped when the tactile sensor ( 1 ) detects a contact with the object and / or the proximity sensor ( 2 ) detects an approximation of the object within a predeterminable distance.

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