CN205181314U - Portable pair of mesh pupil detection device - Google Patents

Abstract

The utility model discloses a portable binocular pupil detection device, which comprises a grasping binocular pupil detection equipment imaging system, the imaging system includes two infrared cameras, two infrared illumination light sources, two stimulation light sources, a grasping type Equipment and single-chip microcomputer, infrared camera, lighting source, stimulation light source, and single-chip microcomputer are integrated in the grasping device, the camera and light source are connected with the single-chip microcomputer, and the single-chip microcomputer is responsible for signal control and data input and output; the pupil tracking measurement module is integrated in the single-chip microcomputer, and the The images collected by the single-chip microcomputer are tracked and measured, and the measurement results are analyzed and processed; the device is highly portable and can be used in first aid, field and other occasions. The measurement results are accurate and intuitive, and the application prospects are huge.

Description

A portable binocular pupil detection device

technical field

The utility model belongs to the field of visual detection, and in particular relates to a portable binocular pupil detection device, which includes an infrared camera, an infrared lighting light source, a stimulating light source, a grasping device, a measurement display device, a single-chip microcomputer control, a data processing control module and pupil tracking The measurement system module is suitable for medical applications in clinical ophthalmology, neurosurgery, psychiatry and related fields.

Background technique

When the human eye is stimulated by light, the pupil narrows, which is called the pupillary light reflex. The constriction of the pupil is accomplished by the pupillary sphincter muscle innervated by the parasympathetic nerve in the oculomotor nerve, and the dilation of the pupil is accomplished by the pupillary dilator muscle innervated by the sympathetic nerve. The reflex on the same side is called the direct light reflex, while the constriction on the opposite side is called the indirect light reflex. Damage to central accommodation will result in diminished or absent light reflexes.

The diameter of the normal pupil is 2.5-4.5 mm, which is round, and the pupils on both sides are basically the same size, the difference is generally not more than 0.5 mm, and the light reflection is sensitive. The pupil size of each person is affected by factors such as age, physiological state, refraction, and external environment, and is different in size. If the pupil diameter is more than 6 mm or less than 2 mm, it is abnormal; the pupils on both sides are unequal, especially when accompanied by slow or disappearing light emission, it is pathological. In normal people, the pupils of children are larger, and the pupils of the elderly are smaller. It is a physiological phenomenon that the pupils constrict during sleep and dilate after waking up. Some drug poisoning can cause miosis, such as organophosphate, barbiturol, morphine and opium derivatives poisoning. Some mental symptoms, such as anxiety, panic, pain, etc. can cause mydriasis; atropine, cocaine, and botulinum toxin poisoning can also cause mydriasis; local eye lesions can affect the shape, size and light reflection of the pupil, such as cornea , iris and other lesions. Therefore, clinically, according to the above characteristics, pupil light reflex equipment is used to screen related diseases in clinical ophthalmology, neurosurgery, psychiatry and even drug rehabilitation.

When inspecting the pupil light reflex equipment, use concentrated light to illuminate the middle of the two eyes, observe the light reflection, and then move the light source to the center of the pupils on both sides respectively, and observe the direct reflection and indirect light reflection of the pupil. Cause the aperture to become smaller, called direct light reflection. If the other eye is illuminated, the pupil of the non-illuminated eye causes constriction, which is called the indirect light reflex. Both direct and indirect reflexes are absent, seen in deep coma or ipsilateral oculomotor nerve damage; direct light reflex is absent, indirect light reflex exists, seen in ipsilateral optic nerve damage; therefore, binocular light reflex measurement is necessary.

There is a latency of the pupillary light reflex, which is the time interval between the initiation of light stimulation and the initiation of the pupillary response. Coma patients are dull, with a long latency period, and if the photosensitive time of the stimulus is too short, the pupillary light reflex is not obvious. Therefore, it is necessary to prolong the photo-stimulation time for deep coma patients.

Traditional pupil detection methods mainly include electroretinogram, visual evoked potential and electrooculogram, etc.; pupil testers are mainly fully enclosed inspection boxes; portable inspection equipment mainly include hand-held pupil penlights, flashlights, etc. The disadvantages of existing inspection equipment and methods are:

(1) Measurement content and accuracy are limited: hand-held pupil penlights, flashlights, etc. cannot objectively, quantitatively and accurately measure the pupil size and light reflection, including the inability to measure the light reflection latency and pupil contraction speed, etc. ;

(2) Poor portability: the pupil detector is bulky and heavy, and needs to be placed in a flat environment, so it is not suitable for use in the field;

(3) The detection object is limited: the existing equipment, the stimulation time of the stimulating light source is fixed, and the disease cannot be checked for special patients, such as patients with severe coma;

(4) Inconvenient operation and susceptible to interference from subjective factors: Traditional pupil detector equipment requires manual participation in many test procedures. The differences in manual operations and subjective judgments may lead to inaccurate tests and require the cooperation of the subjects Very high, it will bring discomfort to the subject;

(5) Poor real-time performance: The camera acquisition frame rate of the existing pupil detection equipment is low, and the real-time performance of the pupil measurement software is poor, so the measurement accuracy is limited;

(6) Limited operating efficiency: Existing portable devices do not support binocular pupillary light reflex inspection, and cannot screen patients with abnormal indirect light reflex;

(7) The measurement result is not intuitive: the existing pupil light reflex equipment provides measurement result parameters without an intuitive change curve.

In view of the above-mentioned shortcomings of traditional equipment, the inventor has designed a portable binocular pupil detection device.

Utility model content

In order to overcome the deficiencies in the prior art, the utility model has developed a portable binocular pupil detection device, which includes an infrared camera, an infrared lighting source, a stimulating light source, a gripping device, a display device, a single-chip microcomputer data processing control module and pupil tracking measurement module. The time mode of the stimulating light source of the device is adjustable, and it supports binocular pupil measurement. The device is highly portable, and the algorithm of the pupil tracking measurement system has high precision and strong real-time performance, which improves the measurement accuracy of the device.

Among them, the infrared camera, light source and single-chip microcomputer data processing module are integrated inside the grip-type device, and the display module is installed outside the grip-type device; the pupil tracking measurement module is applied to the single-chip microcomputer data processing module, and the camera image input is obtained by the single-chip microcomputer, and the pupil tracking measurement Module tracking and calculation, single-chip microcomputer output to the display screen or other terminals through wireless WIFI or Bluetooth; infrared lighting source and stimulation light source are processed and controlled by the grasping device through the single-chip microcomputer, that is, the buttons on the grasping device can be controlled by the grasping device. button to select different light source stimulation time for measurement;

Among them, the software of the pupil tracking measurement module designed a step-by-step area-adaptive sub-pixel tracking algorithm, which not only improves the pupil tracking accuracy, but also reduces the tracking calculation algorithm time to 1/20 or even lower than the original, which greatly improves the pupil tracking accuracy. The time resolution ability of the pupil tracking process is improved, which can better meet the practical needs of clinical pupil tracking with high precision and high speed. The specific method is to aim at the gray distribution and noise characteristics of the human eye image, and propose an automatic threshold segmentation algorithm based on the gray feature of the human eye pupil, which realizes the rough positioning of the pupil center and the interception of the pupil area, avoiding the spot, eyelashes, The influence of disturbing objects such as eyelids. According to the result of rough positioning, remove the bright spots produced by the illumination source in the pupil, re-calculate the automatic threshold, judge and calculate the pupil centroid, and quickly limit the pupil position and pupil area in the next frame according to the centroid position, speed up the detection speed, and realize the real-time positioning of the pupil track. The measurement algorithm of the pupil tracking measurement system has high real-time performance, captures continuous pupil images, collects many samples, and realizes high-precision pupil tracking detection.

In addition, the measurement results are analyzed according to the collected data under different stimulation conditions, and the analysis plan is designed. According to the test experiment and clinical application experiment, a set of standard reference system for pupil light reflex parameters is analyzed and a diagnostic report is output. It can be directly displayed on the built-in display screen of the body, and can also complete the interaction between portable or wearable devices and terminals through data storage, compression technology, wireless transmission technologies such as Bluetooth, ZigBee, Wifi, and wired connections.

The beneficial effect of measuring device of the present utility model is:

(1) Grip or wearable devices are highly portable and can be used in places with poor natural conditions such as first aid, wards, and even the wild;

(2) The measurement results are accurate and intuitive, and can be quickly displayed on the display screen;

(3) The grasping handle is detachable, and the main body of the device can be used as the core component of the wearable device, which can be fixed on the operating table or on the subject alone;

(4) Support binocular pupil measurement, and can obtain direct and indirect pupil light reflex measurement results;

(5) The equipment is highly flexible and supports wireless or wired output of the measurement results to the data terminal to meet the storage requirements of the measurement results;

(6) The stability of the measurement results is high. The structure of the grasping or wearable device ensures the stability of the phase position between the device and the eye, ensuring the pupil image quality and the accuracy of the measurement results;

(7) The stimulation spectrum, stimulation intensity, stimulation waveform and stimulation time of the optical stimulator of the measurement equipment can be set as required to meet the needs of various clinical indications and special environments;

(8) The pupil tracking measurement software algorithm adopts a step-by-step area adaptive sub-pixel tracking method, which has high tracking accuracy and effectively improves the pupil tracking frame rate and tracking accuracy under the same computing performance;

(9) The measuring equipment includes a display device, which not only displays the pupil image and the parameters of the measurement results, but also provides an intuitive pupil change curve, which is convenient for the operator to observe and analyze;

(10) The software system provides a standard reference system for pupil light reflex parameters through test experiments and clinical application tests.

The above description is only an overview of the technical solution of the utility model. In order to understand the technical means of the utility model more clearly and implement it according to the contents of the specification, the following is a detailed description of the preferred embodiment of the utility model with accompanying drawings. rear. The specific embodiment of the utility model is given in detail by the following examples and accompanying drawings. Many places in the utility model only describe the parts that have been improved, while other unexplained parts can be realized by means of existing technologies in the field, that is, the undescribed parts can be realized by using existing technologies, and will not be described in detail here.

Description of drawings

The drawings described here are used to provide a further understanding of the utility model and constitute a part of the application. The schematic embodiments of the utility model and their descriptions are used to explain the utility model and do not constitute improper limitations to the utility model. In the attached picture:

Fig. 1 is a schematic diagram of the system structure of the present utility model.

Fig. 2 is a schematic diagram of the appearance structure of the utility model.

Fig. 3 is a schematic structural diagram of the pupil tracking measurement module of the present invention.

Explanation of reference signs:

1: switch button; 2: stimulus light source knob; 3: pupil tracking button; 4: display screen; 5: grip device; 6, 7: measured position; 8, 9: soft buffer ring; 11: power supply; 12, 13: infrared camera; 14, 15: infrared lighting source; 16, 17: stimulating light source.

detailed description

The technical implementation process of the present utility model will be further described below in conjunction with the accompanying drawings and embodiments.

Example 1:

This embodiment illustrates the system framework of the present invention.

In conjunction with accompanying drawing 1, it is a schematic structural diagram of the system of the present invention, and the system includes a graspable binocular pupil detection device imaging system and a pupil tracking measurement module. Among them, the imaging system includes two infrared cameras, two infrared lighting sources, two stimulating light sources, a grasping device and a single-chip microcomputer. The infrared camera, lighting source, stimulating light source and single-chip microcomputer are integrated inside the grasping device. Single-chip microcomputer connection, the single-chip microcomputer is responsible for signal control and data input and output; the pupil tracking measurement module is integrated in the single-chip microcomputer, and the image collected by the single-chip microcomputer is tracked and measured, and the measurement results are analyzed and processed, and finally displayed on the built-in screen. Output to the terminal through wireless (such as WIFI, Bluetooth) or wired connection.

The lighting source inside the imaging system of the grasping binocular pupil detection device can be a near-infrared lighting source. The near-infrared lighting source is controlled by a single-chip microcomputer to provide a stable lighting environment for imaging; the spectrum, brightness, and stimulation time of the stimulating light source can be set through the system. Changes, such as: choose green light for stimulation light source, brightness 1000mcd, stimulation time 400ms;

The measurement result display device is embedded on the grip device, supporting the display of pupil images and measurement results.

The pupil tracking measurement module supports the output of data and measurement reports, and outputs the results to other terminals for further storage and analysis.

With reference to Figure 1, external control input, record storage, report generation, etc. can also be completed by a computer with memory.

Example 2:

This embodiment is carried out on the basis of the foregoing embodiment 1. The difference from the foregoing embodiment 1 is that this embodiment describes the appearance structure of the system of the present utility model in detail.

In conjunction with accompanying drawing 2, it is a schematic diagram of the appearance structure of the utility model, including a front view, a rear view (Fig. 2a) and a top view (Fig. 2b).

The utility model is a grasping measuring device, which includes infrared cameras 12 and 13, and the two cameras are independently and directly controlled by a single-chip microcomputer to respectively complete image acquisition and finally connect with the pupil tracking measurement module; combined with the attached Figure 2a, the top of the gripping device is the measuring part, and the lower part is the handle.

Infrared lighting sources 14 and 15 are installed in the device, which are controlled by a single-chip microcomputer and are installed on one side of the camera, in front of the eyes, to ensure that the bright spots formed by the infrared lighting sources in the eyes fall inside the pupils, so as not to affect the pupil measurement accuracy;

Stimulating light sources 16 and 17 are installed in the device, and the stimulating light source is installed on the other side of the camera, directly facing the eyes. The pupil tracking measurement module or the buttons on the device control the opening and closing and the stimulation time of the stimulating light source.

A display screen 4 is installed above the measurement part of the equipment, and the display screen displays the input image of the pupil measurement software, the measurement results and the change curve of the measurement results; the display screen faces doctors and other personnel for easy observation.

A single-chip microcomputer 10 and a power supply 11 are installed inside the handle of the device. The single-chip microcomputer provides the operating environment of the pupil tracking measurement software, is responsible for the input and output of camera control and acquisition, is responsible for the signal input of various light sources, and is responsible for the display driver of the display screen. The control line and the data line are connected with the infrared camera, the light source and the display screen. The power supply 11 provides power for the camera and the single-chip microcomputer, and can also provide power for other light sources. The power supply supports AC charging and is convenient to use.

There are buttons 1, 2, and 3 on the left and right sides of the display. 1 is the device switch button, 2 is the stimulus light source knob, and 3 is the pupil tracking button. The stimulus light source knob and the pupil tracking button are respectively installed on the left and right sides of the display screen. It is convenient for both left and right hands to operate.

The system structure of the utility model is light and compact. The user only needs to turn on the switch of the device, hold the handle of the device, place the device in front of the subject, wait for the pupil image to appear on the display screen, and press the tracking button to start the measurement. The result is displayed on the screen. The user can also adjust the time of the stimulating light source and the illuminance of the illuminating light source for different patients and then perform tracking measurement. After the inspection is completed, the results can be sent to other terminals, such as printers, to print inspection reports.

Example 3:

This embodiment is carried out on the basis of the foregoing embodiment 1 or 2. The difference from the foregoing embodiments is that this embodiment further improves the grasping device.

The binocular pupil light reflex tracking system includes a grasping device. The top of the grasping device is a measuring part, and the lower part is a handle. Both the measuring part and the handle have built-in spaces for installing infrared cameras, infrared lighting sources, and single-chip microcomputers. , stimulating light source, and power supply; the handle of the grasping device is equipped with a single-chip microcomputer and power supply; the front surface of the measuring part of the grasping device is embedded with a display screen, which is connected to the single-chip microcomputer; the bottom of the right side of the display screen has a On and off buttons. There are stimulus light source knobs and pupil tracking buttons on the left and right sides of the display screen respectively. One set of stimulus light source knobs and pupil tracking buttons are installed on the left and right sides of the display screen; The inspected position is surrounded by a soft buffer ring; an infrared camera, an infrared lighting source, and a stimulating light source are installed above each inspected position and near the top surface of the measuring part of the grasping device; two cameras Each is independently connected to the single-chip microcomputer; the two infrared lighting sources are connected to the single-chip microcomputer; the power supply is connected to the infrared camera, the single-chip microcomputer, the infrared lighting source, the infrared camera, and the stimulating light source.

The devices in the system are connected using data lines.

Further, the system is also externally connected with a computer and a printer.

Further, the system also includes a wireless signal transmitting end.

Further, the grasping device is equipped with a packing box, and a hollow foam pad is arranged in the packing box, and the space formed by the hollow part is slightly larger than that of the grasping device.

Further, it also includes a support frame used in conjunction with the grasping device.

Further, the bottom of the supporting frame body is equipped with 3 or more rollers.

Example 4:

This embodiment is carried out on the basis of the foregoing embodiment 1 or 2 or 3, and the difference from the foregoing embodiments is that the pupil tracking measurement module is designed in this embodiment.

In conjunction with accompanying drawing 3, it is a schematic diagram of the pupil tracking measurement module of the present invention. After the system module inputs the pupil image, the pupil threshold is calculated by the threshold calculation module 01 based on the gray feature of the pupil. Based on the pupil threshold, the pupil centroid fuzzy positioning module 02 Carry out fuzzy positioning calculation on the pupil centroid to obtain the rough centroid of the pupil. Verify the validity of the pupil centroid through the pupil centroid verification module 03. If it is invalid, the tracking will fail. Otherwise, the pupil area prediction pupil tracking module 04 will predict the pupil area. Precisely locate the pupil in the area, that is, the pupil centroid precise positioning module 05 obtains the precise pupil centroid coordinates, and the pupil centroid verification module 06 verifies the pupil centroid. If it is invalid, it fails, otherwise enter the pupil diameter calculation module 07 to obtain the pupil diameter, that is, one frame Image tracking is complete. After all the image tracking within the detection time is completed, the analysis module of the pupil tracking measurement module will analyze and process the pupil data to obtain measurement results, such as the pupil response latency to light, pupil contraction rate, pupil contraction ratio and other parameters, and then can be used for the measurement parameters Further analysis of the subject's condition.

The utility model improves the existing technology, so the prior art is used for reference in the implementation process, and due to space limitations, the prior art part is not described in detail; any technical part not mentioned in the utility model can be adopted. There is technology to achieve.

The above descriptions are only preferred embodiments of the present utility model, and are not intended to limit the present utility model. For those skilled in the art, the present utility model can have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present utility model shall be included in the protection scope of the present utility model.

Claims (6)

1. a portable binocular pupil detector, it is characterized in that: portable binocular pupil detector comprises grasping type equipment, described grasping type equipment top is measurement section, bottom is handle, measurement section, handle all with built-in space, for installation infrared camera, infrared illumination source, single-chip microcomputer, stimulating light source, power supply; The handle position inside of grasping type equipment is provided with single-chip microcomputer and power supply; The measurement section front side surface of grasping type equipment is embedded with display screen, and display screen is connected with single-chip microcomputer; Display screen bottom right side has shift knob, and on the left of display screen and right side has stimulating light source knob, pupil tracing button respectively, and wherein stimulating light source knob and pupil tracing button respectively install one group about display screen; On rear side of the measurement section of grasping type equipment, embedded two are subject to inspection position, are soft bumper ring by examining around position; Each by above inspection position, the measurement section of grasping type equipment is provided with infrared camera, infrared illumination source, stimulating light source near the position of end face; Two infrared cameras separate connection single-chip microcomputer separately; Two infrared illumination source are connected to single-chip microcomputer; Power supply is connected to infrared camera, single-chip microcomputer, infrared illumination source, stimulating light source; In described portable binocular pupil detector, device connects employing data wire.

2. portable binocular pupil detector according to claim 1, is characterized in that: described device is also circumscribed with computer, printer.

3. portable binocular pupil detector according to claim 1 and 2, is characterized in that: described device also comprises wireless signal transmission end.

4. portable binocular pupil detector according to claim 3, is characterized in that: described grasping type equipment is furnished with packing crates, and arrange the foam pad of hollow in described packing crates, space that hollow space is formed is slightly larger than grasping type equipment.

5. portable binocular pupil detector according to claim 4, is characterized in that: described device also comprise one with the supporting frame of described grasping type coordinative composition of equipments.

6. portable binocular pupil detector according to claim 5, is characterized in that: the roller being furnished with more than 3 and 3 bottom described supporting frame.