CN113749606A - Wearable eyeball protrusion measuring device and eyeball protrusion measuring method - Google Patents
Wearable eyeball protrusion measuring device and eyeball protrusion measuring method Download PDFInfo
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Abstract
The invention discloses a wearable eyeball protrusion degree measuring device and an eyeball protrusion degree measuring method. The measuring device comprises a measuring part, a fixing part and a control part, wherein the fixing part comprises a hard frame body and a fixing support; the measuring part comprises a pair of measuring mechanisms capable of detecting the protrusion degree of the left eye and the right eye and a camera; the control part comprises a pressure belt and a distance sensor, the pressure change of the pressure belt drives the measuring mechanism to move relatively, and the distance sensor can sense the relative displacement distance of the measuring mechanism; the control center comprises a pressure balance processing module and an image processing module. The measuring device controls the horizontal movement of the measuring mechanism through pressure change, obtains the determined orbital distance through means such as image quality evaluation and the like, automatically reads the eyeball protrusion measuring result under the constant orbital distance, has stable and uniform detection conditions, effectively avoids influencing factors such as angle change of manually selected detection sites, manual operation errors and the like, and improves the repeatability and the measuring precision of the eyeball protrusion.
Description
Technical Field
The invention relates to the technical field of eye detection, in particular to a wearable eyeball protrusion degree measuring device and an eyeball protrusion degree measuring method.
Background
The degree of eyeball protrusion is the basis for judging clinical diagnosis, severity and treatment effect of various ophthalmic diseases, and is a basic clinical examination item.
The existing eyeball protrusion measuring instrument is a handheld visual eyeball protrusion meter, and the total reflection property of an isosceles right triangle optical glass prism is utilized to project the corneal vertex and a graduated scale to the front of the prism through the total reflection of an inclined plane at the same time, so that the height of the eyeball protruding out of the orbital margin can be measured. Scales are marked on the inner side surface of the isosceles right triangle prism, and a red line is respectively arranged on the inner side surface and the front side surface. During measurement, a measured person needs to look ahead, a worker needs to move the sight line left and right to enable the two red lines of the prism to be completely overlapped, and at the moment, corresponding scales on the inner side face of the prism are read, namely the eyeball projection degree.
However, the conventional eyeball protrusion meter has the following disadvantages in the process of measuring the degree of eyeball protrusion: 1. subjective influence factors are many, links needing subjective judgment and interpretation by inspectors are too many, and repeatability and reproducibility of measurement results are reduced; 2. the requirement on an inspector in the operation process is high, the inspector needs to determine the reading size by the left-right movement of the horizontal sight line while maintaining the position balance of the eyeball protrusion meter by two hands, and the selection of the orbital distance detection point, the slight movement of the protrusion meter in the horizontal direction or the oblique direction, the change of the sight line direction and the like in the detection process are almost inevitable, and all the factors can cause the change of the measurement result; 3. manual reading is needed, and a measurement result is recorded additionally, so that rapid quality judgment cannot be performed on the measurement result, and the judgment on the accuracy of the detection result is influenced.
Aiming at the problems of low accuracy and poor repeatability of the traditional manual eyeball protrusion degree measurement, the prior art adopts various modes to replace manual eyeball protrusion degree reading or adopts some conversion modes to calibrate the measurement result. For example, the wearable eyeball protrusion measuring device disclosed in chinese patent CN110215185A is provided with a series of reflectors, eyepieces, objective lenses, adapter eyepieces and a second reticle, so that the image of the eyeball can be overlapped with the scale on the second reticle, and the measurement can be achieved by observing the image on the scale, without affecting the measurement result due to the observation angle and the difference of the observer; the eyeball protrusion measuring instrument disclosed in the Chinese patent CN112806956A improves the measurement precision through light-assisted calibration; the portable eyeball protrusion measuring instrument disclosed in the Chinese patent CN107960985B utilizes infrared light to detect the eyeball protrusion, thereby avoiding the angle deviation of manual observation and improving the accuracy of detection; the wearable device disclosed in CN112754421A automatically aligns the eyes of the patient by moving along XYZ axes, and takes a picture of the eye to measure the degree of protrusion, thereby improving the accuracy of the detection. It can be seen that the prior art mainly aims at improving the accuracy of the eyeball protrusion, especially the accuracy of the measurement reading, but the repeatability of the measurement result also has an important influence on the detection result of the eyeball protrusion, and the prior art lacks of improvement and improvement.
Disclosure of Invention
In order to further improve the repeatability of the detection result of the eyeball protrusion degree, the invention provides the wearable eyeball protrusion degree measuring device which has stable and uniform detection conditions and high repeatability of the measurement result through a constant pressure technology, and the measurement error of the eyeball protrusion degree is effectively reduced. The invention also provides a method for measuring the eyeball protrusion degree based on constant pressure adjustment, which determines the detection position of the eyeball protrusion degree through a constant pressure detection technology, reads the measurement result with the assistance of image processing, eliminates the interference of artificial observation factors, improves the repeatability of the measurement result and ensures that the measurement result is more reliable and controllable.
In order to achieve the above object, the present invention provides a wearable device for measuring an eyeball protrusion degree, comprising a measuring part, a fixing part and a control part, wherein the fixing part comprises a hard frame body and a fixing bracket; at least one auricle bracket is respectively arranged on two sides of the hard frame body; two ends of the hard frame body are respectively provided with a fixed bracket, and each fixed bracket is provided with a fixed groove;
the measuring part comprises a pair of measuring mechanisms and cameras capable of detecting the protrusion degree of the left eye and the right eye, the measuring mechanisms are respectively arranged on the fixed support and can move relatively, and the cameras are arranged at positions capable of reading the measurement readings of the measuring mechanisms;
the control part comprises a pressure belt and a distance sensor, a pressure adjusting element is arranged in the pressure belt, the pressure change of the pressure belt drives the measuring mechanism to move relatively, and the distance sensor can sense the relative displacement distance of the measuring mechanism;
the control center comprises a pressure balance processing module and an image processing module, and the pressure balance processing module controls the pressure adjusting element.
Preferably, the hard frame body is a closed frame body formed by more than two relatively movable fixed frames, and each fixed frame is provided with one fixed support.
Preferably, the fixed frames are connected through sliding rails, and the sliding rails of the fixed frames are mutually rails.
Preferably, the fixed bracket is connected with the hard frame in a sliding manner.
Preferably, the pressure belt is a pressure balloon, and the pressure adjusting element adjusts the pressure inside the pressure balloon by inflation and deflation.
Preferably, both ends of the pressure belt are respectively connected with a structure that the measuring part or the fixing part can move relatively.
Preferably, the distance sensor is arranged at a connecting part of the fixed bracket and the hard frame body.
Preferably, the fixing part further comprises a fixing band, and two ends of the fixing band are respectively connected with the two frames of the hard frame body.
The invention also provides an eyeball protrusion measuring method, which comprises the following steps:
s1, pressurizing the pressure band, and extruding the measuring mechanisms to move oppositely along the horizontal direction when the pressure band inside the hindbrain of the tested person is pressurized until the pressure inside the pressure band reaches the preset pressure;
s2, image acquisition, image processing and image quality evaluation are carried out on the measurement result of the eyeball protrusion degree measurement mechanism, and the pressure balance processing module adjusts the measurement mechanism to move relatively through the pressure adjusting element until the image quality evaluation is qualified; the distance sensor records the moving distance of the measuring mechanism when the image quality evaluation is qualified, and the outer orbital distance of the tested person under the preset pressure is calculated;
the image quality evaluation is to evaluate the distance between the eyeball protrusion position of the detected person and the effective scale mark in the eyeball protrusion measuring mechanism in the collected image and the image definition;
the image quality evaluation is qualified, namely the distance between the eyeball protrusion position of the detected person in the collected image and the prism mark line in the eyeball protrusion measuring mechanism is 0, and the image is clear;
and S3, when the image quality evaluation is qualified, acquiring a measurement result image of the eyeball protrusion measuring mechanism of the detected person under the eyeball protrusion detecting site, and outputting the eyeball protrusion measuring result after image processing.
Preferably, the image processing includes: and carrying out gray processing, median filtering processing and binary image conversion on the acquired image in sequence, and identifying the eyeball projection degree value of the detected person from the obtained binary image.
The invention also provides a computer readable storage medium for storing instructions, which comprises a control program for controlling the device in the technical scheme; or, a program for executing the eyeball protrusion degree measuring method according to the above-described technical means.
Compared with the prior art, the invention has the beneficial effects that:
the orbit distance and the accuracy of the measurement of the protrusion degree have a close relation, the wearable eyeball protrusion degree measuring device provided by the invention controls the horizontal movement of the measuring mechanism in a pressure adjusting mode, automatically measures the orbit distance under certain pressure, measures the eyeball protrusion degree under the condition of determining the orbit distance, can simultaneously realize the measurement of the orbit distance and the eyeball protrusion degree, has stable and uniform detection conditions, effectively avoids the influence factors of angle change, artificial operation error and the like of artificially selected detection sites, improves the repeatability and the measurement accuracy of the eyeball protrusion degree, and provides more reliable physiological and pathological detection data for clinic.
The method for measuring the eyeball protrusion degree provided by the invention firstly detects the orbital distance under constant pressure, detects the eyeball protrusion degree under the constant orbital distance, has more accurate detection result and high repeatability of the measurement result, and obtains more reliable data when the eyeball protrusion degree is detected in clinical reexamination or interval time.
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In order to make the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be described in detail below. It is to be understood that the described embodiments are merely exemplary of the invention, and not restrictive of the full scope of the invention. All other embodiments, which can be derived by a person skilled in the art from the examples given herein without any inventive step, are within the scope of the present invention.
FIG. 1 is a top view of a portable extraocular measuring device in accordance with the present invention;
the device comprises a left cross rod 1, a right cross rod 2, a controller 3, a left measuring mechanism support 4, a right measuring mechanism support 5, a left camera 6, a right camera 7, a left prism 8, a right prism 9, a left fixing frame 10, a right fixing frame 11, a pressure air bag 12, a transverse fixing belt 13, a left fixing support 14, a right fixing support 15 and a longitudinal fixing belt 16, wherein the left cross rod, the right cross rod, the controller 3, the left measuring mechanism support 5, the right measuring mechanism support 6, the right camera 7, the left prism 8, the right prism 9, the left fixing frame 10, the right fixing frame 11, the pressure air bag 12, the transverse fixing belt 13, the left fixing support 14, the right fixing support 15 and the longitudinal fixing belt 16 are arranged in sequence;
FIG. 2 is a schematic diagram of the left front side structure of the portable device for measuring eyeball protrusion according to the present invention;
wherein, 4 is a left measuring mechanism bracket, 8 is a left prism, 10 is a left fixing frame, and 17 is a left auricle bracket;
FIG. 3 is a schematic diagram of the controller of the portable device for measuring eyeball protrusion according to the present invention;
wherein 18 is a control button, 19 is a controller base box, 20 is a display screen, and 21 is a power interface;
fig. 4 is a measurement result image of the portable eyeball protrusion measuring device of the present invention.
Detailed Description
The invention provides a wearable eyeball protrusion measuring device which comprises a measuring part, a fixing part and a control part. The fixing part comprises a hard frame body and a fixing support. The hard frame body mainly plays a role in supporting and is used for fixing the device on the head of a testee to avoid shaking; at least one auricle bracket is respectively arranged on two sides of the hard frame body, the auricle bracket can be shown as 17 in figure 2, and the device is erected on the auricle of a testee to realize support. The fixed bracket mainly plays a role in bearing the measuring part and driving the measuring part to move; the two ends of the hard frame body are respectively provided with a fixing support, each fixing support is provided with a fixing groove, the fixing grooves can be as shown in 14 and 15 of figure 1, and the fixing supports are clamped at the lowest positions of two temporal side orbital rims of a tested person to realize fixing and supporting. The hard frame body is relatively fixed on the head of a patient through the auricle support and the fixing groove. In order to further strengthen the fixation, the fixing part preferably further comprises a fixing band, and two ends of the fixing band are respectively connected with the two frames of the hard frame body. The fixed band chooses flexible material for use usually, bypasses the supplementary fixed stereoplasm framework in testee top of the head portion during use, and cooperation auricle support and fixed recess realize three-dimensional fixed. In order to further enhance the auxiliary fixing effect, the fixing band of the present invention preferably includes a transverse fixing band and a longitudinal fixing band, as shown in 13 and 16 of fig. 1, respectively, to enhance the fixing effect of the device of the present invention by transverse and longitudinal fixing.
In some preferred embodiments of the present invention, the rigid frame is preferably a closed frame composed of two or more relatively movable fixed frames, and each fixed frame is provided with a fixed bracket. When the hard frame body consists of more than two fixing frames capable of moving relatively, the fixing supports are respectively arranged on different fixing frames. The number of the fixing frames can be two or more; as shown at 10 and 11 in fig. 1, the relatively movable fixed frames are two. The hard frame body is constructed by the fixing frame capable of moving relatively, so that the size of the whole frame body can be adjusted conveniently, and the head size of different testees can be adapted. In order to fix the relative position of the fixing frame, the invention can further adopt a proper temporary fastening structure to fix the fixing frame, and various fastening structures known in the field such as a buckle and the like can be suitable for the invention. The invention is further preferable that the fixed frames are connected through sliding rails, and the sliding rails of the fixed frames are mutually rails; fig. 1 provides an example, in the figure, sliding rails are respectively arranged on opposite surfaces of a left cross rod 1 and a right cross rod 2 and are mutually rails.
In the present invention, the fixing bracket may have various shapes as long as it can carry the measuring mechanism. The number of the fixing supports can be two or more, and the specific number is determined according to the number and the structure of the measuring mechanisms. In an alternative embodiment of the present invention, the measurement mechanisms may be capable of moving relative to each other, may be moved based on a relatively movable fixed frame, may be moved based on a fixed bracket that is slidable on a rigid frame, or may be a combination of moving methods. Preferably, the fixed support is connected with the hard frame body in a sliding manner, and the fixed support can drive the measuring part to move relatively; fig. 1 provides an example, in which a left fixing bracket 4 and a right fixing bracket 5 are respectively slidably connected to relatively movable fixing frames.
The measuring part comprises a pair of measuring mechanisms capable of detecting the protrusion degree of the left eye and the right eye and a camera. The measuring mechanisms are respectively arranged on the fixed support and can move relatively, and the camera is arranged at a position where the reading measured by the measuring mechanisms can be read. The measuring mechanism of the invention comprises an isosceles right triangle prism or a similar device using the prism principle, and the measuring result of the measuring mechanism is reflected on certain interfaces in the form of images and can be fixed through certain image forms. The camera of the present invention is used for capturing the measurement result of the measuring mechanism, such as one of the measurement result images shown in fig. 4, which includes a partial eye image of the subject and a partial scale for measuring the degree of eyeball protrusion. The cameras are arranged at positions capable of effectively collecting measurement result images, and can be respectively arranged on the fixed support as shown in 6 and 7 of figure 1; the camera may also be arranged on the measuring mechanism, the rigid frame or a separate holder.
The control part comprises a pressure belt and a distance sensor. The pressure belt of the present invention is provided with a pressure adjusting element for adjusting the internal pressure of the pressure belt. The pressure belt extrudes or relaxes the skin of a tested person and the measuring mechanism through the increase or decrease of the internal pressure, the slight extrusion of the pressure belt on the skin of the tested person during measurement can effectively reduce the measurement result error caused by the skin edema of a patient and the like, and the extrusion or relaxation of the measuring mechanism can drive the relative movement between the measuring mechanisms. Preferably, two ends of the pressure belt are respectively connected with a structure that the measuring part or the fixing part can move relatively; more optionally, two ends of the pressure belt are respectively connected to the outer side of the fixing support. In the present invention, the pressure regulating element preferably includes a pressure sensor and a pressure regulator, the pressure regulator can realize pressurization and depressurization inside the pressure band, and the pressure sensor can feed back the pressure value in the pressure band, so as to facilitate the control and regulation of the pressure balance processing module. The control part adjusts the relative movement of the measuring mechanism through pressure conversion, manual operation is replaced, the measuring site can be accurately positioned in each measurement, and the repeatability and the measuring accuracy of the measurement are effectively improved. In the present invention, the pressure belt may be a pressure bladder, and the internal pressure is adjusted by the inflation and deflation of the pressure adjusting element. The corresponding relation between the internal pressure regulation and control of the pressure belt and the relative movement of the measuring mechanism is as follows: when a pressure belt arranged behind the brain of a tested person is started, the pressure is increased to a preset pressure in advance according to the instruction of the pressure balance processing module, and the measuring mechanism is extruded through the connecting positions at the two ends of the pressure belt in the pressure increasing process, so that the measuring mechanisms move oppositely along the horizontal direction; the pressure band keeps stable in the measuring process, and the left and right eye protrusion degrees of the testee are measured when the image quality evaluation is qualified; after the measurement is finished, the pressure is reduced to an initial value according to the instruction of the pressure balance processing module, the pressure outside the measuring mechanism disappears in the pressure reduction process, and the normal position is automatically recovered. The distance sensor can sense the relative displacement distance of the measuring mechanism; in one embodiment of the invention, the distance sensor is arranged at a connecting part of the fixed bracket and the hard frame body.
The control center comprises a pressure balance processing module and an image processing module, wherein the pressure balance processing module controls a pressure adjusting element. The pressure balance processing module is used for processing the relative movement of the measuring mechanism adjusted by the control part based on the pressure change, and the image processing module is used for correspondingly processing the measuring result data collected by the camera and outputting the measuring data. The pressure balancing module is respectively connected with the image processing module, the pressure adjusting element and the distance sensor and can receive the presetting and adjustment of the pressure in the pressure band from the outside. In order to realize the output of the measured data and the input of the preset pressure, the control center of the invention can also comprise a display screen and/or a sound output element, and the measured data can also be transmitted to a specified device in a wired or wireless mode.
The invention also provides an eyeball protrusion measuring method based on the constant pressure detection technology, which comprises the following steps:
s1, pressurizing the pressure band, and extruding the measuring mechanisms to move oppositely along the horizontal direction when the pressure band inside the hindbrain of the tested person is pressurized until the pressure inside the pressure band reaches the preset pressure;
s2, image acquisition, image processing and image quality evaluation are carried out on the measurement result of the eyeball protrusion degree measurement mechanism, and the pressure balance processing module adjusts the measurement mechanism to move relatively through the pressure adjusting element until the image quality evaluation is qualified; the distance sensor records the moving distance of the measuring mechanism when the image quality evaluation is qualified, and the outer orbital distance of the tested person under the preset pressure is calculated;
the image quality evaluation is to evaluate the distance between the eyeball protrusion position of the detected person and the effective scale mark in the eyeball protrusion measuring mechanism in the collected image and the image definition;
the image quality evaluation is qualified, namely the distance between the eyeball protrusion position of the detected person in the collected image and the prism mark line in the eyeball protrusion measuring mechanism is 0, and the image is clear;
and S3, when the image quality evaluation is qualified, acquiring a measurement result image of the eyeball protrusion measuring mechanism of the detected person under the eyeball protrusion detecting site, and outputting the eyeball protrusion measuring result after image processing.
In the invention, the method for judging the image definition can be a Tenengrad gradient method, a Lap l ac i an gradient method, a variance method and other methods known in the field or similar methods; and the judgment standard of the image definition is correspondingly adjusted according to different judgment methods. In the invention, the method for detecting the distance between the eyeball protrusion position of the tested person in the collected image and the effective scale mark in the eyeball protrusion measuring mechanism can be completed by image analysis software, such as imagi ne J and other methods known in the art and capable of achieving similar functions.
Preferably, the image processing includes: and carrying out gray processing, median filtering processing and binary image conversion on the acquired image in sequence, and identifying the eyeball projection degree value of the detected person from the obtained binary image.
Specifically, the method for detecting the degree of eyeball protrusion by using the portable device for measuring the degree of eyeball protrusion according to the above technical solution of the present invention comprises:
(1) fixing the hard frame body on the head of a testee, wherein the pressure belt surrounds the hindbrain of the testee, and the eyeball protrusion measuring device can horizontally move relatively in a fixed state;
(2) the pressure balance processing module sends a first instruction to control the pressure regulating element to pressurize the pressure band, and the pressure band extrudes the contact part of the testee and the measuring mechanism along with the rise of the pressure in the pressure band, so that the measuring mechanism moves oppositely along the horizontal direction until the pressure is increased to the preset pressure and stops;
(3) starting a camera, starting to acquire a measurement result image of the measurement mechanism, transmitting measurement result data to an image processing module by the camera for image processing and image quality evaluation, feeding back an image quality evaluation result to a pressure balance processing module, sending a second instruction by the pressure balance processing module, controlling a pressure regulating element to regulate the pressure in a pressure band so as to regulate the relative displacement of the measurement mechanism, continuously acquiring the measurement result image and feeding back the image quality evaluation result to the pressure balance processing module in the process, stopping the pressure regulating element when the pressure balance processing module receives a signal that the image quality evaluation is qualified, keeping the pressure in the pressure band unchanged, and taking the position of the measurement device as a detection site;
the image quality evaluation is to evaluate the distance between the eyeball protrusion position of the detected person and the effective scale mark in the eyeball protrusion measuring mechanism in the collected image and the image definition;
the image quality evaluation is qualified, namely the distance between the eyeball protrusion position of the detected person in the collected image and the prism mark line in the eyeball protrusion measuring mechanism is 0, and the image is clear;
(4) when the image quality evaluation is qualified, the distance sensor records the moving distance of the measuring mechanism, and the outer orbital distance of the tested person under the preset pressure is calculated; meanwhile, the camera processes the measurement result image of the measurement mechanism of the detection site and outputs the eyeball protrusion measurement result.
The portable eyeball protrusion measuring device provided by the invention can simultaneously realize the measurement of the orbital distance and the eyeball protrusion, obtain the constant orbital distance by a constant pressure control and image quality evaluation mode, measure the eyeball protrusion under the constant orbital distance, enable the measurement values to be stable and repeatable for many times, obtain the eyeball protrusion measuring result under the same orbital distance, and has more accurate detection result and smaller error.
The orbital distance is the distance between temporal lateral margins of orbital bones, namely the external orbital distance between two eyes of a tested person. Specifically, the orbital distance calculation method comprises the following steps: the distance between the measuring mechanisms when the portable device for measuring the degree of eyeball protrusion is started is recorded as L0The moving distance of the measuring mechanism from the start to the qualified image quality evaluation is L△Then the orbital distance L is calculated according to the following formula:
L＝L0-L△
the technical solutions provided by the present invention are described in detail below with reference to examples, but they should not be construed as limiting the scope of the present invention.
Example 1
As shown in fig. 1, the device is a portable device for measuring the degree of eyeball protrusion, and can detect the degree of eyeball protrusion and orbital distance.
The left fixing frame 10 and the right fixing frame 12 form a closed hard frame body, a left cross rod 1 and a right cross rod 2 between the left fixing frame 10 and the right fixing frame 12 realize horizontal relative movement, and sliding rail connections which are guide rails are arranged on contact surfaces of the left cross rod 1 and the right cross rod 2 to realize width adjustment of the hard frame body. As shown in fig. 2, the left fixing frame 10 and the right fixing frame 12 are respectively provided with an auricle support. The left fixing frame 10 and the right fixing frame 12 are respectively provided with a left fixing support 4 and a right fixing support 5, the fixing supports are connected with one frame of the fixing frame in a sliding mode, and the left fixing support 4 and the right fixing support 5 can move relatively in the horizontal direction. The inner sides of the left fixing support 4 and the right fixing support 5 are respectively provided with a left fixing groove 14 and a right fixing groove 15, and the hard frame body is fixed on the head of a testee by the fixing grooves and the auricle supports. The horizontal fixing strap 13 fixes both ends on two frames of the hard frame body along the horizontal direction, and the vertical fixing strap 16 fixes both ends on two frames of the hard frame body perpendicular to the horizontal direction. The eyeball protrusion measuring device is three-dimensionally fixed through a transverse fixing belt 13 and a longitudinal fixing belt 16. And distance sensors are further arranged at the joints of the left fixing support 4 and the right fixing support and the hard frame body and used for detecting the displacement distance of the measuring mechanism.
The left fixing support 4 and the right fixing support 5 are respectively provided with an optical prism in the shape of an isosceles right triangle, namely a left prism 8 and a right prism 9, the left prism 8 and the right prism 9 can convert the protruding degree of left and right eyes into transverse length, and the eyeball protruding degree measuring result is displayed through mirror scale marks on one sides of the left prism 8 and the right prism 9, which are parallel to the left cross rod 1 and the right cross rod 2. And a left camera 6 and a right camera 7 are arranged at the positions parallel to the mirror surfaces of the left prism 8 and the right prism 9 for displaying the measuring results, and the left camera 6 and the right camera 7 are respectively fixed on the left fixing support 4 and the right fixing support 5. And the left fixing support 4 and the right fixing support 5 are respectively provided with a control motor for controlling the horizontal relative movement of the left fixing support 4 and the right fixing support 5. The two ends of a pressure belt 12 capable of adjusting the internal pressure are respectively connected with the outermost sides of the left fixing support 4 and the right fixing support 5, the pressure belt 12 is a pressure air bag, a pressure adjusting element is arranged on the pressure belt, the pressure adjusting element is composed of a pressure regulator capable of inflating and deflating and a pressure sensor capable of sensing the internal pressure, and the pressure sensor feeds back the internal pressure value of the pressure belt to the pressure balance processing module.
The right fixed bracket 5 is also provided with a controller 8, the controller 8 comprises a control base box 10, a control button 18 arranged on the surface of the control set 10, a liquid crystal display 20 and a power interface 19; a control center is arranged in the control base box 10 and is respectively in signal connection with the pressure sensor, the pressure belt and the camera; the control center comprises a pressure balance processing module and an image processing module. A power supply is also provided within the control base box 10 for powering the various control elements.
When the portable device for measuring the exophthalmos is used:
(1) before measurement, the device is fixed on the head of a testee, the distance between the left fixing groove 14 and the right fixing groove 15 can be adjusted by the testee through the relatively movable fixing frame, so that the fixing grooves are respectively attached to the left eye outer orbital rim and the right eye outer orbital rim of the testee, the auricle bracket is manufactured on the ear, and the transverse fixing belt and the longitudinal fixing belt are fixed around the top of the head of the testee.
(2) The pressure balance processing module sends a first instruction to control the pressure regulating element to pressurize the pressure band, and the pressure band extrudes the contact part of the testee and the measuring mechanism along with the rise of the pressure in the pressure band, so that the measuring mechanism moves oppositely along the horizontal direction until the pressure is increased to the preset pressure and stops.
(3) The measuring device is started, the testee looks at the front, the left prism 8 and the right prism 9 can convert the protruding degree of the glasses in the axial direction of the testee into the transverse length, and the scales on the inner side surface of the triangular prism with the same waist straight angle are collected by the left camera and the right camera together. The left camera and the right camera collect measurement result images of the left prism and the right prism respectively, the collected measurement result images are transmitted to the control center, the image processing module processes the images and evaluates the image quality, and the image quality evaluation result is fed back to the pressure balance processing module; when the image quality evaluation is unqualified, the pressure balance processing module sends a second instruction, the pressure adjusting element is controlled to adjust the pressure in the pressure band so as to adjust the relative displacement of the measuring mechanism, the measuring result image is continuously acquired and the image quality evaluation result is fed back to the pressure balance processing module in the process, until the pressure balance processing module receives a signal that the image quality evaluation is qualified, the pressure adjusting element stops working, the pressure in the pressure band is kept unchanged, and the position of the measuring device is the detection site;
the image processing is specifically as follows: carrying out gray level processing on the acquired measurement result image to obtain a corresponding gray level image; carrying out median filtering processing on the gray level image; converting the image after the median filtering processing into a binary image; and identifying the information of the protruding length of the eyeball of the tested person in the binary image.
The image quality evaluation is specifically as follows: a) image sharpness evaluation: evaluating whether the image analysis software can effectively identify the scale; b) evaluating the coincidence degree of two side marking lines of the prism in the image; c) the scale is clear and recognizable; d) and acquiring the distance between the eyeball protrusion position of the detected person in the image and the effective scale mark in the eyeball protrusion measuring mechanism.
The image quality evaluation is qualified, namely the distance between the eyeball protrusion position of the detected person in the collected image and the prism mark line in the eyeball protrusion measuring mechanism is 0, and the image is clear.
(4) When the image quality evaluation is qualified, the distance sensor records the moving distance of the measuring mechanism, and the outer orbital distance of the tested person under the preset pressure is calculated; meanwhile, the camera processes the measurement result image of the measurement mechanism of the detection site and outputs the eyeball protrusion measurement result.
By using the device, the orbital distance and the left and right eyeball projection data of the testee can be obtained. The measured value of the orbital distance of the testee is basically unchanged during repeated measurement, and the obtained measured data of the eyeball protrusion degree is more accurate and has strong repeatability.
Claims (10)
1. A wearable device for measuring the degree of eyeball protrusion is characterized by comprising a measuring part, a fixing part and a control part, wherein the fixing part comprises a hard frame body and a fixing bracket; at least one auricle bracket is respectively arranged on two sides of the hard frame body; two ends of the hard frame body are respectively provided with a fixed bracket, and each fixed bracket is provided with a fixed groove;
the measuring part comprises a pair of measuring mechanisms and cameras capable of detecting the protrusion degree of the left eye and the right eye, the measuring mechanisms are respectively arranged on the fixed support and can move relatively, and the cameras are arranged at positions capable of reading the measurement readings of the measuring mechanisms;
the control part comprises a pressure belt and a distance sensor, a pressure adjusting element is arranged in the pressure belt, the pressure change of the pressure belt drives the measuring mechanism to move relatively, and the distance sensor can sense the relative displacement distance of the measuring mechanism;
the control center comprises a pressure balance processing module and an image processing module, and the pressure balance processing module controls the pressure adjusting element.
2. The apparatus of claim 1, wherein the rigid frame is a closed frame consisting of two or more relatively movable fixed frames, each fixed frame having a fixed bracket.
3. The device of claim 2, wherein the fixed frames are connected by sliding rails, and the sliding rails of the fixed frames are mutually rails.
4. The device of claim 1, wherein the fixed bracket is slidably connected to a rigid frame.
5. The device of claim 1, wherein the pressure band is a pressure bladder and the pressure regulating element regulates pressure within the pressure bladder by inflation and deflation.
6. The device according to claim 1 or 5, wherein the two ends of the pressure belt are respectively connected with a structure that the measuring part or the fixed part can move relatively.
7. The device according to claim 1 or 5, wherein the distance sensor is arranged at a connecting part of the fixing bracket and the hard frame body.
8. The device of claim 1, wherein the fixing portion further comprises a fixing band, and two ends of the fixing band are respectively connected to two rims of the rigid frame.
9. An eyeball protrusion measuring method is characterized by comprising the following steps:
s1, pressurizing the pressure band, and extruding the measuring mechanisms to move oppositely along the horizontal direction when the pressure band inside the hindbrain of the tested person is pressurized until the pressure inside the pressure band reaches the preset pressure;
s2, image acquisition, image processing and image quality evaluation are carried out on the measurement result of the eyeball protrusion degree measurement mechanism, and the pressure balance processing module adjusts the measurement mechanism to move relatively through the pressure adjusting element until the image quality evaluation is qualified; the distance sensor records the moving distance of the measuring mechanism when the image quality evaluation is qualified, and the outer orbital distance of the tested person under the preset pressure is calculated;
the image quality evaluation is to evaluate the distance between the eyeball protrusion position of the detected person and the effective scale mark in the eyeball protrusion measuring mechanism in the collected image and the image definition;
the image quality evaluation is qualified, namely the distance between the eyeball protrusion position of the detected person in the collected image and the prism mark line in the eyeball protrusion measuring mechanism is 0, and the image is clear;
and S3, when the image quality evaluation is qualified, acquiring a measurement result image of the eyeball protrusion measuring mechanism of the detected person under the eyeball protrusion detecting site, and outputting the eyeball protrusion measuring result after image processing.
Preferably, the image processing includes: and carrying out gray processing, median filtering processing and binary image conversion on the acquired image in sequence, and identifying the eyeball projection degree value of the detected person from the obtained binary image.
10. A computer-readable storage medium storing instructions, comprising a control program for controlling the apparatus of any one of claims 1-8; or, a program for executing the eyeball protrusion degree measuring method according to claim 9.
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| CN116807382A (en) * | 2023-07-07 | 2023-09-29 | 浙江大学 | Intraoperative eyeball protrusion measuring device and measuring method |
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