CN204115707U - Medical electronic endoscope field angle self-operated measuring unit - Google Patents
Medical electronic endoscope field angle self-operated measuring unit Download PDFInfo
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- CN204115707U CN204115707U CN201420521454.9U CN201420521454U CN204115707U CN 204115707 U CN204115707 U CN 204115707U CN 201420521454 U CN201420521454 U CN 201420521454U CN 204115707 U CN204115707 U CN 204115707U
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Abstract
A kind of medical electronic endoscope field angle self-operated measuring unit, comprise display device, scope end locating device, image acquisition units and central processing unit, display device, scope end locating device is all connected with central processing unit with image acquisition units, display device is arranged at the front of scope end locating device, the end of tested fujinon electronic video endoscope is fixed on scope end locating device, central processing unit controls and obtains the shape of figure shown by display device, size and display position, obtain the distance between tested scope end and display device display screen exported from scope end locating device, receive the view data from image acquisition units, the summit field angle of the tested fujinon electronic video endoscope of measurements and calculations and entrance pupil field angle.This device can be measured automatically to the summit field angle of medical electronic endoscope and entrance pupil field angle, and without the need to requiring harsh adjustment operation, measure convenient and swift, measuring accuracy is high.
Description
Technical field
The utility model relates to a kind of device for measuring medical endoscope field angle, belongs to medical electronic endoscope field angle field of measuring technique.
Background technology
Medical endoscope is a kind of clinically important diagnostic equipment, enters inside of human body by natural duct or surgical incision, carries out observing, diagnose or treating.Medical endoscope common clinically mainly contains three classes at present: rigid endoscope, fibrescope, fujinon electronic video endoscope.Field angle is the important technical indicator of medical endoscope, directly reflects the range of observation of medical endoscope, is the basic index weighing endoscopic technique performance.The measurement of field angle all has necessity and significance in the field such as research and development, manufacture, quality control of medical endoscope.
China pharmaceuticals industry standard YY 0068.1-2008 " medical endoscope rigid endoscope part 1: optical property and method of testing " provides a kind of measuring method for rigid endoscope field angle.The method uses graduation ring as mark, measures the field angle of rigid endoscope.It is measured difficult point and is, the method requires that operating personnel are by adjustment operation repeatedly, " making mark graduation ring concentric with visual field and the vertical optical axis " (see this standard A .2.2.3 clause).In fact, this adjustment operation is the link wasted time and energy most in whole measuring process, needs operating personnel repeatedly to adjust many-sided influence factors such as mark, fixture, tested rigid endoscope and measuring distance and can meet above-mentioned test request.Experiment proves, even if experienced operating personnel, usually also needs the time expending more than 30 minutes just can reach the requirement of " making mark graduation ring concentric with visual field and the vertical optical axis ".
The measurement attempting above-mentioned rigid endoscope field angle measuring method to be used for fujinon electronic video endoscope field angle is unpractical.First, the mirror body of fujinon electronic video endoscope is flexible, can to a certain extent to surrounding free bend, and its optical axis is not easily directly accurately identified by naked eyes.Secondly, fujinon electronic video endoscope mirror body length is general longer, the easy stressed damage of internal component, adjustment is operated and implements very difficult.Above 2 reasons make rigid endoscope field angle measuring method not possess actual operability for the measurement of fujinon electronic video endoscope field angle.
At present, the documents and materials about medical electronic endoscope field angle measuring method or device are not yet retrieved.
Summary of the invention
The utility model, for the blank of medical electronic endoscope field angle automatic measurement technology, provides a kind of convenient to operation, medical electronic endoscope field angle self-operated measuring unit that measuring accuracy is high.
Medical electronic endoscope field angle self-operated measuring unit of the present utility model, by the following technical solutions:
This device, comprise display device, scope end locating device, image acquisition units and central processing unit, display device, scope end locating device are all connected with central processing unit with image acquisition units, and display device is arranged at the front of scope end locating device.
Described scope end locating device, comprises pedestal, line slide rail, slide block and annular lock tube; Line slide rail is arranged on pedestal, and slide block is installed on line slide rail, slide block is provided with annular lock tube, and slide block and line slide rail are equipped with displacement sensing apparatus, and displacement sensing apparatus is connected with central processing unit.Ring lock cover is used for the end of fixing tested fujinon electronic video endoscope.
The instruction assigned address display given size on the display apparatus of display device foundation central processing unit and the figure of geometric relationship.Scope end locating device is used for the end of fixing tested fujinon electronic video endoscope and makes its eyepiece towards display device, tested fujinon electronic video endoscope end is moved along the vertical center axis of display device display screen, measures the distance between tested fujinon electronic video endoscope end and display device display screen and export result to central processing unit.Image acquisition units is connected with the image output interface of tested fujinon electronic video endoscope and gathers the image that tested fujinon electronic video endoscope obtains, and is connected and by the image transmitting of tested fujinon electronic video endoscope to central processing unit with central processing unit.Central processing unit is for controlling and obtain the shape of figure shown by display device, size and display position, obtain the distance between tested scope end and display device display screen exported from scope end locating device, receive the view data from image acquisition units, the summit field angle of the tested fujinon electronic video endoscope of measurements and calculations and entrance pupil field angle.
The utility model can be measured automatically to the summit field angle of medical electronic endoscope and entrance pupil field angle, without the need to requiring harsh adjustment operation, measure convenient and swift, measuring accuracy is high, and this device will become the important survey instrument in the fields such as medical electronic endoscope research and development, manufacture and quality control.
Accompanying drawing explanation
Fig. 1 is the structured flowchart of the utility model medical electronic endoscope field angle self-operated measuring unit.
Fig. 2 is the structural representation of scope end locating device in the utility model.
Wherein, 1, display device, 2, scope end locating device, 3, image acquisition units, 4, central processing unit, 5, slide block, 6, line slide rail, 7, annular lock tube, 8, pedestal.
Embodiment
As shown in Figure 1, medical electronic endoscope field angle self-operated measuring unit of the present utility model, comprise display device 1, scope end locating device 2, image acquisition units 3 and central processing unit 4, display device (display) 1, scope end locating device 2 are all connected with central processing unit 4 with image acquisition units 3.
Display device 1 is for showing various resolution chart.Be arranged on the front (see Fig. 2) of scope end locating device 2.The display screen that display device adopts is flat-faced screen, and display area should be enough large.Display screen can adopt the modes such as LCDs, electronic ink screen or light emitting diode matrix to realize.Display device 1 is by the control of central processing unit 4.Display device 1 adopt the physical resolution of display screen (picture element density), the display display parameter such as area, pixel column columns are stored into central processing unit 4 in advance.Central processing unit 4 can according to the shape of figure shown by above-mentioned display parameter control display device 1, size and display position.In instantiation, display device 1 uses white (or high brightness) as display background, uses black (or low-light level) to carry out display test pattern, and should improve the contrast of display graphics as far as possible.
Image acquisition units 3 can adopt image or video frequency collection card to realize.Image acquisition units 3 is connected to the image output interface of tested fujinon electronic video endoscope by corresponding interface, and the resolution chart that display device 1 can be shown gathers after tested fujinon electronic video endoscope imaging, and transfers to central processing unit 4.
The structure of scope end locating device 2, as shown in Figure 2, comprises pedestal 8, line slide rail 6, slide block 5 and annular lock tube 7.Pedestal 8 is provided with line slide rail 6, slide block 5 is installed on line slide rail 6, can linearly slide rail 6 linear reciprocating motion, and can be locked in a certain position of line slide rail 6 to measure.Slide block 5 is provided with annular lock tube 7, annular lock tube 7 is for the end of fixing tested fujinon electronic video endoscope.Annular lock tube 7 is arranged on slide block 5 by having the optical adjusting frame (adjustment rack be such as made up of extension bar and bridge) rotating adjustment and lock function, also can adopt other that annular lock tube 7 can be made to rotate device or the structure of adjustment and locking.Pass through optical adjusting frame, annular institute overlap 7 also can be locked to certain anglec of rotation around the rotation of its vertical center axis, regulate with this and lock tested video image dendoscope end towards so that measure stravismus, side-looking or backsight fujinon electronic video endoscope time by its eyepiece towards display device 1.Display device 1 is installed on the front (left side in Fig. 2 is front) of line slide rail 6, and line slide rail 6 is perpendicular to the display screen of display device 1.The central point of annular lock tube 7 is arranged on the vertical center axis (dot-and-dash line of Fig. 2) of display device 1 display screen, and during to ensure to measure, tested fujinon electronic video endoscope end is also positioned on the vertical center axis of display device 1 display screen.As shown in Figure 2, readjusting the geometry site of each parts after moving for avoiding carrying, can display device 1 is installed on pedestal 8, to guarantee that the geometry site of each parts immobilizes.Slide block 5 and line slide rail 6 are equipped with displacement sensing apparatus (such as capacitor grid transducer), this displacement sensing apparatus is connected with central processing unit 4, carrys out the distance between measure annular lock tube 7 and display device 1 display screen by the relative displacement of measuring slide block 5 and line slide rail 6 and exports result to central processing unit 4.In fact this distance measurements characterizes the distance between tested endoscope tip and display device 1 display screen.
When measuring the field angle of tested endoscope, central processing unit 4 controls display device 1, show a marker graphic in display device display screen central spot, as round dot, cross or other be easy to identify figure, to indicate the position of display device display screen central point.Adopt round dot as marker graphic in instantiation.
The position of moving slider 5 on line slide rail 6, makes display device display location in the working range of tested fujinon electronic video endoscope.The end of tested fujinon electronic video endoscope is installed on annular lock tube 7, and makes the central point of display device display screen be positioned at the visual field of tested fujinon electronic video endoscope.After adjustment, lock tested fujinon electronic video endoscope end, annular lock tube 7 and slide block 5 parts, make them in follow-up measurement, keep relative position constant.Central processing unit 4 reads the distance a between tested fujinon electronic video endoscope end and display device display screen by the position sensing device on slide block 5 and line slide rail 6.
The image output interface of tested fujinon electronic video endoscope is connected with image acquisition units 3.Image acquisition units 3 gathers the output image of a tested fujinon electronic video endoscope, transfers to central processing unit 4.Central processing unit 4 carries out following analyzing and processing to this image: use Boundary extracting algorithm to extract the field of view edge of tested fujinon electronic video endoscope; Within the scope of field of view the searching image visual field central point and store; With field of view central point be the center of circle, with the bee-line at field of view central point and field of view edge for radius, delimit a circular scope.In the utility model, this circular scope is called the effective image visual field.
Next, central processing unit 4 controls display device 1 and shows each pixel successively.Often show a pixel, central processing unit 4 just calculates the picture (pixel shown by display device 1 is through tested fujinon electronic video endoscope imaging) of shown pixel and the distance of field of view central point according to the output image of tested fujinon electronic video endoscope, to judge whether both overlap.Showing in the process of each pixel successively, when the picture of shown pixel equals zero with the distance of field of view central point, now the display position of this pixel is the intersection point (being called optical axis intersection point in the present invention) of display device 1 display screen and the tested fujinon electronic video endoscope optical axis.Central processing unit 4 calculates the distance b of optical axis intersection point and display device 1 display screen central point.Then, central processing unit 4 calculates distance between tested fujinon electronic video endoscope end and optical axis intersection point according to Pythagorean theorem
Next, pixel display device display screen with following characteristics searched for by central processing unit 4: after tested fujinon electronic video endoscope imaging, and the image position of this pixel is on the edge of the image effective field of view of tested fujinon electronic video endoscope.Central processing unit 4 controls display device 1 and shows each pixel successively.Often show a pixel, central processing unit 4 just gathers the output image of a tested scope by image acquisition units 3, and according to this output image judgement shown by pixel similarly be no being positioned on image effective field of view edge.Circulation like this, until search all satisfactory pixels.In order to improve search efficiency, also can adopt with the optical axis intersection point senior search strategy such as involute urve search or sector search that is starting point.In the utility model, the scope that pixel display device 1 with above-mentioned feature delimited is called apparent field, and the set of above-mentioned pixel is called apparent field edge.Usually, the optical axis due to tested fujinon electronic video endoscope is not orthogonal to display device 1, and apparent field is also non-circular, but the zhou duicheng tuxing of a sub-elliptical.
Central processing unit 4 calculates and searches for the point with optical axis intersection point spacing maximum (or minimum) on apparent field edge.This point and the determined straight line of optical axis intersection point are apparent field's axis of symmetry.On the display screen of display device 1, cross optical axis intersection point and be called that visual field calculates axle perpendicular to the straight line of apparent field's axis of symmetry.Central processing unit 4 FOV of search calculates the intersection point at axle and apparent field edge, and calculates the distance r between this intersection point and optical axis intersection point, and this distance is called that visual field calculates radius.
Central processing unit 4 is according to the summit field angle α of the tested scope of following formulae discovery:
Wherein arctan () is traditional method of indicating the pronunciation of a Chinese character function.
Within the scope of the operating distance of tested fujinon electronic video endoscope, after slide block 5 is moved a segment distance, and lock slider 5 again.Repeat above-mentioned measuring process, obtain distance c ' under new position between tested fujinon electronic video endoscope end and optical axis intersection point and visual field calculates radius r '.Central processing unit 4 is according to the entrance pupil field angle β of the tested scope of following formulae discovery:
Claims (1)
1. a medical electronic endoscope field angle self-operated measuring unit, it is characterized in that, comprise display device, scope end locating device, image acquisition units and central processing unit, display device, scope end locating device are all connected with central processing unit with image acquisition units, and display device is arranged at the front of scope end locating device; Described scope end locating device comprises pedestal, line slide rail, slide block and annular lock tube; Line slide rail is arranged on pedestal, and slide block is installed on line slide rail, slide block is provided with annular lock tube, and slide block and line slide rail are equipped with displacement sensing apparatus, and displacement sensing apparatus is connected with central processing unit.
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| CN201420521454.9U CN204115707U (en) | 2014-09-11 | 2014-09-11 | Medical electronic endoscope field angle self-operated measuring unit |
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| CN201420521454.9U CN204115707U (en) | 2014-09-11 | 2014-09-11 | Medical electronic endoscope field angle self-operated measuring unit |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106017867A (en) * | 2015-03-24 | 2016-10-12 | 北京威斯顿亚太光电仪器有限公司 | Method for detecting field angle of hard tube endoscope |
| CN106153303A (en) * | 2015-03-24 | 2016-11-23 | 北京威斯顿亚太光电仪器有限公司 | A kind of dioptric detection method of rigid endoscope based on liquid lens |
| CN110530608A (en) * | 2019-07-16 | 2019-12-03 | 韶关市技师学院(韶关市高级技工学校、韶关市职工大学、韶关市农业学校) | A kind of rigid endoscope device for detecting performance |
-
2014
- 2014-09-11 CN CN201420521454.9U patent/CN204115707U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106017867A (en) * | 2015-03-24 | 2016-10-12 | 北京威斯顿亚太光电仪器有限公司 | Method for detecting field angle of hard tube endoscope |
| CN106153303A (en) * | 2015-03-24 | 2016-11-23 | 北京威斯顿亚太光电仪器有限公司 | A kind of dioptric detection method of rigid endoscope based on liquid lens |
| CN106017867B (en) * | 2015-03-24 | 2018-07-06 | 北京威斯顿亚太光电仪器有限公司 | A kind of detection method for rigid pipe endoscope field angle |
| CN106153303B (en) * | 2015-03-24 | 2018-07-20 | 北京威斯顿亚太光电仪器有限公司 | A kind of detection method of the rigid endoscope diopter based on liquid lens |
| CN110530608A (en) * | 2019-07-16 | 2019-12-03 | 韶关市技师学院(韶关市高级技工学校、韶关市职工大学、韶关市农业学校) | A kind of rigid endoscope device for detecting performance |
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Granted publication date: 20150121 Termination date: 20170911 |
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| CF01 | Termination of patent right due to non-payment of annual fee |