CN1189769A - Electromagnetic object detector with test electrode for a medical diagnostic apparatus - Google Patents
Electromagnetic object detector with test electrode for a medical diagnostic apparatus Download PDFInfo
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- CN1189769A CN1189769A CN 97190407 CN97190407A CN1189769A CN 1189769 A CN1189769 A CN 1189769A CN 97190407 CN97190407 CN 97190407 CN 97190407 A CN97190407 A CN 97190407A CN 1189769 A CN1189769 A CN 1189769A
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- electrode
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- emission
- electromagnetic field
- test electrode
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Abstract
An apparatus for medical diagnosis and/or therapy includes an electromagnetic obstacle sensor in order to prevent collisions with, for example, a patient to be examined. The sensor is constructed so as to include a radiation transmitter and a radiation receiver in the form of capacitive electrodes (16 and 18), respectively, whereto electronic circuits (26 and 28) for signal processing are connected. In order to enable the electrodes (16 and 18) and the electronic circuits (26 and 28) to be checked for correct operation, a test electrode (14) is connected between the transmitter electrode (16) and the detection electrode (18), which test electrode can be connected, if desired, to a point (32) of fixed voltage via a controllable switch (34). The presence of an obstacle is thus simulated. The output signal of the electronic circuits (26 and 28) can be checked to determine whether this output signal corresponds to the situation in which an obstacle is present.
Description
The present invention relates to a kind of device that is used for medical diagnosis and/or treatment, comprise a checkout gear that is used near the target the movable part that is positioned at device is carried out electromagnetic detection, this checkout gear comprises:
An emission electrode that is connected to movable part, in order near electromagnetic field of generation emission electrode,
One is connected to movable part and is configured near the detecting electrode of emission electrode, in order near the electromagnetic field the detection detecting electrode,
Receptor in order near the input signal of electromagnetic field receiving corresponding to detecting electrode at input, and produce one and input signal corresponding output signal.
Known this kind of means from the disclosed patent application DE 4126168 of Germany.
A device that is used for medical diagnosis and/or treatment can comprise a ray emitter and a ray receiver.An example in this respect is exactly a medical X-ray device, and it comprises an X-ray source and an x-ray detector that is regarded as image intensifier usually.This two element is configured to that certain distance is arranged each other, and the patient that need check or treat is positioned between X-ray source and the image intensifier.X-ray source and image intensifier should enable needs inspection part (i.e. " target ") imaging to patient body with respect to the configuration of patient body.The direction of this device and position can be adjusted by a motor drive usually.In general, within the scope of the invention, a target is considered to refer to examine patient's health, perhaps other examine target, device attendant's the health or the part of health, the part of device itself (for example, the platform that the patient uses) or neighboring devices, or the barrier of other possibility intrusion device parts mobile route.
Many these class devices have a so-called C type arm, i.e. ring support, this support can rotate (promptly wind along an axle that extends perpendicular to plane, C type arm place and rotate) by guide rail (track) in the plane of himself, the plane of himself can be rotated around an axle that is positioned at this plane simultaneously.The probability of some other degree of excursion also can be provided in addition, usually.
When operative installations, the very important point is, in order to obtain the required definition of image, moveable part, for example image intensifier, the very closely target of close examine.Image intensifier has the front surface that relatively large being used to receives the X-ray, and on this front surface or the every bit on its edge all may touch mutually with the target of examine.This collision all may take place at any moving direction of image intensifier.This is undesirable, so this class device all has one in order to detect near the checkout equipment of the target the present device moveable part.Under the situation that adopts motor drive, it is even more important to dispose such checkout equipment.When in one of the distance means moveable part given slight distance, detecting a target, answer (this part) of arresting stop to move to avoid collision.
The patent application DE 4126168 that is quoted discloses a kind of medical X-ray device, and this device comprises an electromagnetism crash sensor, and it can detect the interior target of a given slight distance of present range moveable part.This device comprises that a signal source is in order to produce the signal of telecommunication of a fixed voltage form.This voltage is offered on the emission electrode of a metal in foil form.Near another metal forming with its electric insulation of configuration this metal forming as detecting electrode.Can detect between these two metal formings one corresponding to crash sensor near the signal of electromagnetic field intensity.This signal is for further processing and produces a output signal by a receptor that constitutes by many amplifiers corresponding to electromagnetic field intensity.
When using such device, hope can check out whether the electrode and the electronic circuit operation that are used for signal processing be normal.Therefore, in known crash sensor, with the voltage of each electrode deliver to one with comparator that relevant voltage links in, in comparator, this voltage is compared with a more smaller reference voltage.If the voltage that is transmitted by corresponding electrode is zero, signal of comparator output, its logical value is with to have voltage to transmit under the situation value of output signal by respective electrode opposite.The output voltage of comparator is delivered to a logic circuit to confirm existing of fault.This whether shortcoming of normal method of detecting electrode and electronic circuit operation that is used for: be the additional electronic circuits of its needs, and extension wire itself also may produce fault.So the inefficacy of electrode is not found yet on the one hand, and may send the signal that an expression was lost efficacy on the other hand even under the normal situation about moving of electrode yet.The reliability of the checkout equipment of medical diagnosis and/or therapy equipment thereby be adversely affected.
An object of the present invention is to provide a kind of like this device, wherein can detect the irregular operating of electrode and/or coupled electronic circuit more reliably.
For this reason, device according to the present invention is characterized in that, checkout equipment comprises that one is connected on the moveable part, and be configured near emission electrode and the detecting electrode test electrode, one is connected the control unit that test electrode and have the conduction state of controllable switch between the point of fixed voltage and this switch of control.
Under the situation of normal operation, controllable switch is in non-conductive state.When need be, switch be arranged on conduction state by the control unit that is used for the gauge tap conduction state about the operation information of electrode and the electronic circuit that links to each other.So test electrode just is connected on the point of fixed voltage,, near the electromagnetic field the electrode changes so that presenting as a barrier occurs near the moveable part of device.So by switch being placed conduction state just simulated the existence of a barrier.By observing, can check whether this output signal conforms to the situation that has barrier to exist by the output signal that receptor sent that is used to receive corresponding near the signal of the electromagnetic field detecting electrode.If situation is not like this, in fact can get rid of the not situation on electrode and electronic circuit of reason.
Additional embodiments of the present invention is disclosed in appended claims.
With reference to embodiment as described below, can know and set forth these and others of the present invention
In the accompanying drawings:
Fig. 1 is the full view of a medical X-ray device, wherein can carry out electromagnetic detection to the existence of barrier;
Fig. 2 is a sketch map according to checkout equipment of the present invention.
Fig. 1 is the medical diagnosis of an X-x-ray apparatus form and/or the full view of therapy equipment.The formation of X-x-ray apparatus should comprise a support 2, and an X-ray source 4 and an X-x ray image intensifier x 6 are housed on it.Support is circular arc, thereby can wind along an axle rotation of extending perpendicular to the circular arc plane by a guide rail (track) 8.The support of this form is commonly referred to as C type arm; In general an axle rotation also can extending in the circular arc plane of C type arm.The rotating mechanism that moves among the figure and not shown back one.Also can be by the molectron that support 2 and guide rail 8 constitute around 10 rotations of an axle.This axle is connected on the stand 12, and if desired, stand can be made movably form.X-ray source 4 and x-ray detector 6 preferably also can move with respect to support 2.For the ease of moving of these parts, they can be constructed like this to comprise a motor driver, and driver is not illustrated in the drawings.At this moment target to be detected is the patient's body of examine or treatment, is positioned on the estrade (not shown), and estrade is between image intensifier 6 and X-ray source 4.Because the probability of the various motions of described C type arm 2, image intensifier 6 and X-ray source 4, these parts can be positioned on all directions that need with respect to the patient, and can be to all position imaging that needs.
Because such as the mobility of movable parts such as image intensifier 6 and X-ray source 4, they can touch with examine patient's body or other barriers at an easy rate mutually.This is undesirable, and therefore, the image intensifier of present embodiment has a checkout equipment, is used to detect near the target that exists the moveable part of device.Checkout equipment comprises an emission electrode 16 and a detecting electrode 18.Emission electrode 16 be shaped as an annular electrode, it is settled around the end of image intensifier 6 so that produce an electromagnetic field near this electrode.Detecting electrode 18 be shaped as an annular electrode, settle around the end of image intensifier 6, and be positioned near the emission electrode 16, so that detect the electromagnetic field that produces and twisted by target to be detected by emission electrode 16.Annular electrode 16 and 18 can be subdivided into some circular segments so that obtain directional sensitivity, by the signal that each circular segments produced of emission electrode respectively the respective section of detected electrode detected.Between emission electrode 16 and detecting electrode 18, disposed a test electrode 14, with reference to Fig. 2 its running has been described in detail below.Emission electrode 16, test electrode 14 and detecting electrode 18 are made into band shape in the present embodiment, and are configured around the outer surface of columniform image intensifier.These band electrodes are configured in the same cylinder in parallel to each other around this column type outer surface.
Fig. 2 is the sketch map according to checkout equipment of the present invention.Signal source 22 generates a sinusoidal electric signals, and its wave amplitude size is about 5V and the frequency size is about 100kIIz.Signal source 22 links to each other with emission electrode 16 by a buffer amplifier 24, and its generates near a signal of telecommunication corresponding electromagnetic field with emission electrode 16.Electrode 16 is positioned at the outside of the shell 20 of image intensifier 6.Shell 20 is connected on the point 24 that has a fixed voltage, and this point is called as the ground connection of system.
The electromagnetic field that is produced by emission electrode 16 generates a signal of telecommunication in detecting electrode 18, this signal of telecommunication is delivered to the input of an amplifier 26.Electrode 18 also is positioned at the outside of the shell 20 of image intensifier 6.The output signal of amplifier 26 is sent to a signal processing unit 28 through signal processing apparatus, and this signal processing apparatus and the present invention are irrelevant, thereby (for example, a band filter and a synchronizing indicator) be not shown in the drawings.Said signal processing apparatus can constitute the part of unit 28.Amplifier 26 is formed a receptor in order to receive the output signal corresponding near the electromagnetic field detecting electrode 18 with signal processing unit 28.
The signal that signal source 22 produces is delivered to electrode 16 by buffer amplifier 24.When supposing beginning, near this electrode, there is not target to exist.Between electrode 16 and 18, have capacitive couplings, thereby the electric field that electrode 16 produces is responded to a signal of telecommunication in electrode 18.26 amplifications form a signal thereby this signal is exaggerated device, and its value is the tolerance of input signal amplitude.The output signal of signal source 22 is also delivered to signal processing unit 28, wherein, for example utilizes a synchronizing indicator to produce a DC signal.When a ground connection target (for example, the patient that need check with the X-x-ray apparatus) convergence electrode 16 and 18 o'clock, because the Capacitance Coupled between the electrode increases the voltage of input, thereby said DC signal also increased.To such an extent as to this DC signal is pointed out whether barrier is positioned at very near the place of image intensifier and need be taked control operation, so this signal is used to control moving of this device moveable part.Yet this control method does not constitute a part of the present invention, thereby does not describe in detail below.
When using the X-x-ray apparatus, wish being used for the signal source 22 that signal receives and handles, electrode 16 and 18 and the normal operation of electronic circuit 26 and 28 check.For this reason, disposed a control unit 30 that is connected on the signal processing unit 28, and one be connected test electrode 14 and have controllable switch 34 between the point 32 of fixed voltage, control unit 30 is arranged the conduction state of switch 34 is controlled.Before X-x-ray apparatus operation or switch in service 34 can or under the control of control unit 30, automatically place conduction state by operator's needs.Then test electrode 14 is connected on the point 32 that has fixed voltage, thereby near the electromagnetic field electrode 16 and 18 is with as existing a barrier mode to change near X-x-ray apparatus moveable part 6.Therefore, just can simulate the existence of a barrier to conduction state by regulating switch 34.By the above-mentioned DC signal in the observation signal processing unit 28, just can detect this output signal and whether conform to the situation that has a barrier.If not this situation, can conclude there is a fault that its reason is signal source 22 in fact certainly, is used for the electrode 16 and 18 or electronic circuit 26 and 28 of signal processing and reception.
Claims (3)
1. a device that is used for medical diagnosis and/or treatment comprises a checkout equipment, is used for a near barrier that exists a moveable part (6) of device is carried out electromagnetic detection, and this checkout equipment comprises:
An emission electrode (16), this electrode is connected to above-mentioned moveable part, in order near electromagnetic field of generation emission electrode,
A detecting electrode (18), this electrode is connected to above-mentioned moveable part, and is configured near the emission electrode, in order to a near electromagnetic field the detection detecting electrode,
A receptor (26,28), this receptor are arranged near the corresponding input signal of electromagnetic field one of reception and detecting electrode (18) on the input, generate one and input signal corresponding output signal simultaneously,
It is characterized in that: checkout equipment comprises that is connected to a moveable part, and be configured near emission electrode (16) and the detecting electrode (18) test electrode (14), one is connected test electrode (14) and one and has controllable switch (34) and a control unit (30) that is used for gauge tap (34) conduction state between the point (32) of fixed voltage.
2. according to a device of claim 1, it is characterized in that: emission electrode (16), test electrode (14) and detecting electrode (18) are made into band shape, and are configured to extend parallel to each other in same plane.
3. according to a device of claim 1 or 2, it is characterized in that: test electrode (14) is positioned between emission electrode (16) and the detecting electrode (18).
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP96201075 | 1996-04-22 | ||
| EP96201075.7 | 1996-04-22 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1189769A true CN1189769A (en) | 1998-08-05 |
| CN1153548C CN1153548C (en) | 2004-06-16 |
Family
ID=8223899
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB971904073A Expired - Fee Related CN1153548C (en) | 1996-04-22 | 1997-04-14 | Electromagnetic object detector with test electrode for a medical diagnostic apparatus |
Country Status (3)
| Country | Link |
|---|---|
| JP (1) | JP3882945B2 (en) |
| CN (1) | CN1153548C (en) |
| DE (1) | DE69723394T2 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2007059692A1 (en) * | 2005-11-23 | 2007-05-31 | Beijing Oriental E.T Medical Equipment Co., Ltd | Non-touching crashworthy equipment for medical x-ray devices |
| CN100415167C (en) * | 2002-08-30 | 2008-09-03 | Ge医疗系统环球技术有限公司 | Collision proof method and equipment for C Shape arm X-ray machine |
| CN101044980B (en) * | 2006-03-31 | 2011-07-06 | 株式会社东芝 | Device for preventing magnetic field suction |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2844349B1 (en) * | 2002-09-06 | 2005-06-24 | Nanotec Solution | CAPACITIVE SENSOR PROXIMITY DETECTOR |
| CN101010877B (en) * | 2004-08-31 | 2010-09-08 | 皇家飞利浦电子股份有限公司 | Proximity sensor for x-ray apparatus |
| FR2904750B1 (en) * | 2006-08-03 | 2008-10-17 | Gen Electric | METHOD FOR THREE-DIMENSIONAL RECONSTRUCTION OF AN OUTER ENVELOPE OF A BODY OF AN X-RAY APPARATUS |
| KR101677752B1 (en) * | 2008-06-13 | 2016-11-18 | 코닌클리케 필립스 엔.브이. | Capacitive proximity device and electronic device comprising the capacitive proximity device |
-
1997
- 1997-04-14 JP JP53788797A patent/JP3882945B2/en not_active Expired - Fee Related
- 1997-04-14 CN CNB971904073A patent/CN1153548C/en not_active Expired - Fee Related
- 1997-04-14 DE DE69723394T patent/DE69723394T2/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100415167C (en) * | 2002-08-30 | 2008-09-03 | Ge医疗系统环球技术有限公司 | Collision proof method and equipment for C Shape arm X-ray machine |
| WO2007059692A1 (en) * | 2005-11-23 | 2007-05-31 | Beijing Oriental E.T Medical Equipment Co., Ltd | Non-touching crashworthy equipment for medical x-ray devices |
| CN101044980B (en) * | 2006-03-31 | 2011-07-06 | 株式会社东芝 | Device for preventing magnetic field suction |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2002514949A (en) | 2002-05-21 |
| CN1153548C (en) | 2004-06-16 |
| JP3882945B2 (en) | 2007-02-21 |
| DE69723394T2 (en) | 2004-07-22 |
| DE69723394D1 (en) | 2003-08-14 |
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Legal Events
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| C06 | Publication | ||
| PB01 | Publication | ||
| C53 | Correction of patent for invention or patent application | ||
| CB02 | Change of applicant information |
Applicant after: Koninklike Philips Electronics N. V. Applicant before: Philips Electronics N. V. |
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| COR | Change of bibliographic data |
Free format text: CORRECT: APPLICANT; FROM: N.V. PHILIPS OPTICAL LAMP LTD., CO. TO: ROYAL PHILIPS ELECTRONICS CO., LTD. |
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| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20040616 Termination date: 20100414 |