CN113317975A - Cardio-pulmonary resuscitation pressing depth feedback system based on machine vision - Google Patents
Cardio-pulmonary resuscitation pressing depth feedback system based on machine vision Download PDFInfo
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- CN113317975A CN113317975A CN202110713123.XA CN202110713123A CN113317975A CN 113317975 A CN113317975 A CN 113317975A CN 202110713123 A CN202110713123 A CN 202110713123A CN 113317975 A CN113317975 A CN 113317975A
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61H—PHYSICAL THERAPY APPARATUS, e.g. DEVICES FOR LOCATING OR STIMULATING REFLEX POINTS IN THE BODY; ARTIFICIAL RESPIRATION; MASSAGE; BATHING DEVICES FOR SPECIAL THERAPEUTIC OR HYGIENIC PURPOSES OR SPECIFIC PARTS OF THE BODY
- A61H31/00—Artificial respiration or heart stimulation, e.g. heart massage
- A61H31/004—Heart stimulation
- A61H31/006—Power driven
Abstract
The invention discloses a cardio-pulmonary resuscitation pressing depth feedback system based on machine vision, which comprises a feedback pad and a host machine which are independently arranged; the feedback pad is provided with a reference mark for bearing and transmitting the double-hand pressing of a rescuer by being placed at the lower end of the sternum of the patient; the host includes: the video shooting module is used for continuously shooting video images of the feedback pad when the rescuer presses the hands; the control module is used for judging the pressing depth according to the video image and outputting a prompt signal according to the pressing depth; and the prompt module is used for outputting prompt information according to the prompt signal. The cardio-pulmonary resuscitation compression depth feedback system based on machine vision comprises the feedback pad and the host which are independently arranged, the defect that a connecting cable is inconvenient to use is thoroughly overcome, the compression depth is measured by the machine vision, CPR (cardio pulmonary resuscitation) first aid cannot be disturbed by winding the cable in an emergency site, and emergency interruption cannot be caused by carelessly tearing the cable in a hurry way.
Description
Technical Field
The invention relates to the technical field of cardio-pulmonary resuscitation auxiliary equipment, in particular to a cardio-pulmonary resuscitation compression depth feedback system based on machine vision.
Background
Cardiopulmonary resuscitation (CPR for short) is an operation method for applying external compression to the chest of a patient with cardiac arrest in time to promote the heart to recover the normal blood pumping function and corresponding matched instrument equipment.
Most of the existing actual CPR instruments do not have a compression depth feedback function, only voice prompts a rescuer to perform chest compression according to a certain frequency, and the rescuer cannot know whether the compression is in place or not, can not achieve the resuscitation effect when the compression is too shallow, and can easily cause fracture accidents when the compression is too deep.
Some CPR instruments have a CPR compression depth feedback function, but the CPR feedback pads and the CPR host machine are connected by cables, and the cables are very inconvenient in the actual rescue scene. In the sudden cardiac arrest scene of a patient, the optimal rescue time is the implementation of cardiopulmonary resuscitation and rescue within minutes after the onset of disease, under the situation of tension and confusion, a cable connecting a sensor and a host computer is likely to wind the arm of a rescuer to influence normal pressing, or the cable is inadvertently touched to drag the host computer to cause equipment damage, and a cable is likely to cause ineffective rescue, thereby avoiding the optimal rescue opportunity.
In addition, the cable-equipped CPR feedback pad is internally provided with a precise circuit with electronic elements such as an acceleration sensor, and the internal circuit may be damaged by external force during pressing, thereby causing a rescue interruption. The CPR feedback pad with the cable must be horizontally placed when in use, the level is difficult to ensure when rescuing patients, the output signal of the internal acceleration sensor is inaccurate, and the rescue can be misled.
Disclosure of Invention
Aiming at the defects in the prior art, the invention provides a cardio-pulmonary resuscitation pressing depth feedback system based on machine vision, which is used for overcoming the defect that a connecting cable is inconvenient to use and solving the technical problem provided by the background technology.
A cardio-pulmonary resuscitation compression depth feedback system based on machine vision comprises a feedback pad and a host which are independently arranged;
the feedback pad is provided with a reference mark for bearing and transmitting the double-hand pressing of a rescuer by being placed at the lower end of the sternum of the patient;
the host includes:
the video shooting module is used for continuously shooting video images of the feedback pad when the rescuer presses the hands;
the control module is used for judging the pressing depth according to the video image and outputting a prompt signal according to the pressing depth; and
and the prompt module is used for outputting prompt information according to the prompt signal.
Further, the video shooting module comprises an adjusting device, a camera and a video data processor;
the adjusting device is arranged in a shell of the host;
the camera is arranged on the adjusting device, and the adjusting device is in signal connection with the control module and is used for adjusting the shooting angle of the camera;
the camera is in signal connection with the video data processor, and the video data processor is in signal connection with the control module;
the camera is used for continuously shooting video images of the feedback pad when the rescuer presses the hands and converting the video images into video digital signals;
the video data processor is used for processing the video digital signal.
Further, the adjusting device comprises a controller, a rotating mechanism and a holder arranged on the rotating mechanism;
the rotating mechanism comprises a rotating motor and a rotating rod, one end of the rotating rod is in transmission connection with a transmission shaft of the rotating motor, and the holder is installed at the other end of the rotating rod;
the rotating motor and the holder are in signal connection with the controller;
the controller is in signal connection with the control module.
Further, be provided with the mount pad on the casing of host computer, the mount pad is the U type, the one end of rotary rod is rotated through the pivot and is installed in the mount pad, the pivot with the rotary rod sets up perpendicularly, the one end of pivot pass through the gear train with the rotating electrical machines transmission is connected.
Further, the feedback pad is in a shape of a circular cake.
Further, the reference mark comprises a plurality of two-dimensional codes arranged on the upper surface and the lower surface of the feedback pad for positioning and a plurality of rulers longitudinally arranged on the side wall of the feedback pad.
Further, the two-dimensional codes are uniformly distributed on the upper surface and the lower surface of the feedback pad in a circumferential array;
the scales are uniformly distributed along the outer side wall of the feedback pad.
Furthermore, the host computer still includes power module, orientation module, pronunciation collection module and wireless communication module, power module, orientation module, pronunciation collection module and wireless communication module all with control module signal connection.
Further, the control module is a DSP processor.
Further, the prompt module comprises a display screen and a loudspeaker;
the display screen is in signal connection with the control module through a display driving circuit;
the loudspeaker is in signal connection with the control module through an audio power amplifier circuit.
The invention has the beneficial effects that:
(1) the cardio-pulmonary resuscitation compression depth feedback system based on machine vision comprises the feedback pad and the host which are independently arranged, the defect that a connecting cable is inconvenient to use is thoroughly overcome, the compression depth is measured by the machine vision, CPR (cardio pulmonary resuscitation) first aid cannot be disturbed by winding the cable in an emergency site, and emergency interruption cannot be caused by carelessly tearing the cable in a hurry way.
(2) The feedback pad of the invention does not need to be horizontally placed below the sternum of the patient, the host can automatically calibrate the feedback data, and the pressing direction of the arms of the rescuer is not strictly required.
(3) The adjusting device can automatically adjust the shooting angle of the camera, automatically capture the position of the feedback pad and the position of the arm of a rescuer, is convenient and quick, and improves the rescue success rate.
(4) The feedback pad is a passive component for assisting in pressing, electronic components and circuits are not arranged in the feedback pad, and CPR operation cannot be interrupted due to component damage caused by pressing.
Drawings
In order to more clearly illustrate the detailed description of the invention or the technical solutions in the prior art, the drawings that are needed in the detailed description of the invention or the prior art will be briefly described below. Throughout the drawings, like elements or portions are generally identified by like reference numerals. In the drawings, elements or portions are not necessarily drawn to scale.
Fig. 1 is a schematic diagram illustrating the use of a machine vision based cardiopulmonary resuscitation compression depth feedback system according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a host of a cardiopulmonary resuscitation compression depth feedback system based on machine vision according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of a feedback pad of a machine vision based cardiopulmonary resuscitation compression depth feedback system according to an embodiment of the present invention;
fig. 4 is an electrical schematic diagram of a machine vision based cardiopulmonary resuscitation compression depth feedback system according to an embodiment of the present invention;
fig. 5 is a schematic structural diagram of a relationship between a camera inclination angle and a compression depth of a cardiopulmonary resuscitation compression depth feedback system based on machine vision according to an embodiment of the present invention.
Detailed Description
Embodiments of the present invention will be described in detail below with reference to the accompanying drawings. The following examples are only for illustrating the technical solutions of the present invention more clearly, and therefore are only examples, and the protection scope of the present invention is not limited thereby.
It is to be noted that, unless otherwise specified, technical or scientific terms used herein shall have the ordinary meaning as understood by those skilled in the art to which the invention pertains.
As shown in fig. 1-4, the cardiopulmonary resuscitation compression depth feedback system based on machine vision provided by the embodiment of the present invention includes a feedback pad 1 and a host machine 2 which are independently arranged. The feedback pad 1 is provided with a reference mark, when a patient with sudden cardiac arrest is treated, the feedback pad 1 is placed at the lower end of the sternum of the patient, and the host machine 2 is placed on the ground beside the patient opposite to the rescuer. The palms of the hands of the rescuer press the central part of the feedback pad 1 to press quickly, and the feedback pad 1 bears and transmits the pressing of the hands of the rescuer to press the chest of the patient.
The feedback pad 1 is in a round cake shape and comprises a hard inner disc made of a metal plate or hard plastic and a silica gel layer wrapped outside the hard inner disc, the hard inner disc has certain rigidity, so that the chest is uniformly pressed down integrally under stress during pressing, and local damage caused by excessive force is avoided. The silica gel layer plays antiskid and cushioning effect, prevents to scratch chest skin, also can improve and press the handle and be unlikely to be too hard.
The reference mark comprises a plurality of two-dimensional codes 12 arranged on the upper surface and the lower surface of the feedback pad 1 for positioning and a plurality of scales 13 longitudinally arranged on the side wall of the feedback pad 1, and the scales 13 comprise a plurality of scale marks which horizontally extend and are longitudinally distributed at intervals. The two-dimensional codes 12 are uniformly distributed on the upper and lower surfaces of the feedback pad 1 in a circumferential array. The plurality of scales 13 are evenly distributed along the outer side wall of the feedback pad 1.
The host 2 comprises a shell 8 and a video shooting module, a control module and a prompt module which are arranged in the shell 8. The video shooting module is used for continuously shooting video images of the feedback pad 1 when the rescuer presses both hands. The control module is used for judging the pressing depth according to the video image and outputting a prompt signal according to the pressing depth. The prompting module is used for outputting prompting information according to the prompting signal.
Specifically, the video shooting module comprises an adjusting device, a camera 3 and a video data processor. Adjusting device installs in host computer 2's casing 8, and camera 3 installs on adjusting device, and adjusting device and control module signal connection for adjust the shooting angle of camera 3. The camera 3 is in signal connection with a video data processor, and the video data processor is in signal connection with a control module. The camera 3 is used for continuously shooting video images of the feedback pad 1 when the rescuer presses the hands and converting the video images into video digital signals, the color contrast of the scale 13 and the silica gel layer is clear, and the scale is provided with fluorescence, so that the scales of the images shot by the camera 3 at any angle can be read, and the control module can calculate the size proportion coefficient of pixels according to the number of pixels between the scales 12.
The video data processor is used for processing the video digital signal, for example, deleting invalid data such as an unclear image signal or an image signal with an inaccurate shooting angle in the video digital signal.
In this embodiment, the adjusting device includes a controller 4, a rotating mechanism, and a pan/tilt head 5 mounted on the rotating mechanism. The rotating mechanism comprises a rotating motor 6 and a rotating rod 7, one end of the rotating rod 7 is in transmission connection with a transmission shaft of the rotating motor 6, and the cloud platform 5 is installed at the other end of the rotating rod 7. The rotating motor 6 and the holder 5 are in signal connection with the controller 4, and the controller 4 is in signal connection with the control module.
The controller 4 can adopt a microcontroller, the rotating motor 6 adopts a servo motor, the holder 5 adopts an omnidirectional holder, 360-degree rotation can be carried out through a horizontal steering engine, and the up-down inclination angle adjustment within a 90-degree range is carried out in the vertical direction through an inclination angle steering engine. The microcontroller receives a control instruction of the control module, so that the rotating motor 6 and the holder 5 are controlled to move, and the shooting angle of the camera 3 is adjusted. The tripod head 5 is provided with an inclination angle sensor which is in signal connection with the microcontroller and feeds back inclination angle data beta when the camera 3 shoots to the control module in time. The camera 3 automatically captures the two-dimensional code 12 on the feedback pad 1 for positioning under the control of the omnidirectional pan-tilt, and shoots a ruler 13 around the feedback pad 1 for calibrating the image size. A plurality of two-dimensional codes 12 are distributed on two sides of the feedback pad 1 respectively, so that the camera 3 can find the feedback pad 1 quickly at any angle and can be positioned accurately.
Be provided with mount pad 9 on the casing 8 of host computer 2, mount pad 9 is the U type, and the one end of rotary rod 7 is rotated through pivot 10 and is installed in mount pad 9, and pivot 10 sets up with rotary rod 7 is perpendicular, and the one end of pivot 10 is passed through the gear train and is connected with the transmission of rotating electrical machines 6. The housing 8 is provided with a storage groove for storing the rotary rod 7 and the holder 5, and when the device is not used, the rotary rod 7 and the holder 5 are stored in the storage groove, so that the host machine 2 is compact in structure. During the use, rotating electrical machines 6 drives pivot 10 rotatory through the gear train, and pivot 10 both ends are passed through the bearing and are rotated and install in mount pad 9 to make rotary rod 7 upwards lift, make camera 3 stretch out.
Further, the host 2 further comprises a power module, a positioning module, a voice acquisition module and a wireless communication module, wherein the power module, the positioning module, the voice acquisition module and the wireless communication module are in signal connection with the control module.
In this embodiment, the power module includes lithium cell and supply circuit, and the lithium cell passes through supply circuit to video shooting module, control module and prompt module power supply.
The positioning module can adopt a GPS module or a Beidou module and is used for acquiring the geographical position data of the host 2. The voice acquisition module adopts a microphone and is used for converting voice signals into electric signals. The wireless communication module can adopt a 4G module, a 5G module and/or a WiFi module, and is in contact with a 120 first-aid center and an ambulance through the wireless communication module to transmit geographic position data, voice and video, and the first-aid center can remotely guide the scene to carry out more effective rescue.
Specifically, the control module is a DSP processor. The DSP processor measures the depth of compression using machine vision, the basic principle of which is as follows:
and (3) calibrating the depth size: the static image containing the scale 13 is collected and subjected to autocorrelation operation, so that the number n of pixels between adjacent scale marks can be obtained, and the actual distance delta between the adjacent scale marks is known, so that the proportionality coefficient between the pixels and the actual size can be calculated:
measuring the compression depth: continuously collecting up-and-down reciprocating motion images of the pressed palm, finding out the motion images of the palm through a pattern recognition algorithm, carrying out single-valued processing on the two-dimensional images, carrying out cross correlation and other operations in the vertical direction on a plurality of groups of pictures containing the motion trail of the palm, finding out the motion depth pixel value m of the palm in the vertical direction, and calibrating by using a proportionality coefficient to obtain the pressing depth.
With two functions v (t) and h (t) for time-varying picture data, the cross-correlation function z (t) of the two functions reflects the degree to which the functions v (t) and h (t) match each other at different relative positions, which can be expressed as:
discretization into a discretization function of N points is as follows:
the extreme point of the cross-correlation function is determined, and if t is mT, z (kt) reaches the maximum extreme value, which indicates that the difference between the two pictures at different positions is m pixels, and the pixel value m is the pixel projection of the actual compression depth d on the picture, as shown in fig. 5.
Obtaining actual pressing depth data d according to the trigonometric function relation of the inclination angle beta of the camera, the pressing depth d and the pixel displacement m and the calibration of the pixel calibration coefficient k, wherein:
in the above equation, d is the actual CPR compression depth feedback data, m is the calculated pixel depth, Δ is the actual distance between adjacent graduation marks of the scale, n is the number of pixels between adjacent graduation marks of the scale, and β is the inclination angle of the camera.
In this embodiment, the prompting module includes a display screen 14 and a speaker 15. The display screen 14 is in signal connection with the control module through a display driving circuit. The loudspeaker 15 is connected with the control module through an audio power amplifier circuit.
After the control module calculates the actual pressing depth data d, the display screen 14 can be controlled by the display driving circuit to perform visual display on the actual pressing depth data d. According to the real-time change of the actual pressing depth data d, the pressing frequency f can be calculated, whether the pressing depth d and the pressing frequency f reach the standard or not is judged, and how to adjust the force and speed is prompted through voice. For example, the actual pressing depth data d is less than 5cm, and the voice prompt force is too small; and when the actual pressing depth data d is larger than 6cm, the voice prompt force is too large. The pressing frequency is less than 100 times/minute, and the voice prompts that the pressing is too slow; the pressing frequency is more than 120 times/minute, and the voice prompts that the pressing is too fast; and if the actual compression depth data d is more than or equal to 5cm and less than or equal to 6cm, and the compression frequency is more than or equal to 100 times/minute and less than or equal to 120 times/minute, the voice prompt operation is normal. The operation is repeated until the rescue is successful or the rescue is handed over to professional rescuers.
In conclusion, the cardio-pulmonary resuscitation compression depth feedback system based on machine vision disclosed by the invention comprises the feedback pad and the host which are independently arranged, the defect of inconvenience in use of the connecting cable is thoroughly overcome, the compression depth is measured by using the machine vision, the CPR first aid cannot be interfered by winding the cable in an emergency scene, and the first aid cannot be interrupted by carelessly tearing the cable in a hurry way.
The feedback pad of the invention does not need to be horizontally placed below the sternum of the patient, the host can automatically calibrate the feedback data, and the pressing direction of the arms of the rescuer is not strictly required.
The adjusting device can automatically adjust the shooting angle of the camera, automatically capture the position of the feedback pad and the position of the arm of a rescuer, is convenient and quick, and improves the rescue success rate.
The feedback pad is a passive component for assisting in pressing, electronic components and circuits are not arranged in the feedback pad, and CPR operation cannot be interrupted due to component damage caused by pressing.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention, and they should be construed as being included in the following claims and description.
Claims (10)
1. A cardio-pulmonary resuscitation compression depth feedback system based on machine vision is characterized by comprising a feedback pad (1) and a host (2) which are independently arranged;
the feedback pad (1) is provided with a reference mark and is used for being placed at the lower end of the sternum of a patient to bear and transmit the double-hand pressing of a rescuer;
the host (2) includes:
the video shooting module is used for continuously shooting video images of the feedback pad (1) and the pressed hands of the rescuer when the hands are pressed;
the control module is used for judging the pressing depth according to the video image and outputting a prompt signal according to the pressing depth; and
and the prompt module is used for outputting prompt information according to the prompt signal.
2. The machine vision based cardiopulmonary resuscitation compression depth feedback system of claim 1, wherein: the video shooting module comprises an adjusting device, a camera (3) and a video data processor;
the adjusting device is arranged in a shell (8) of the main machine (2);
the camera (3) is arranged on the adjusting device, and the adjusting device is in signal connection with the control module and is used for adjusting the shooting angle of the camera (3);
the camera (3) is in signal connection with the video data processor, and the video data processor is in signal connection with the control module;
the camera (3) is used for continuously shooting video images of the feedback pad (1) when the rescuer presses the hands and converting the video images into video digital signals;
the video data processor is used for processing the video digital signal.
3. The machine vision based cardiopulmonary resuscitation compression depth feedback system of claim 2, wherein: the adjusting device comprises a controller (4), a rotating mechanism and a cloud platform (5) arranged on the rotating mechanism;
the rotating mechanism comprises a rotating motor (6) and a rotating rod (7) with one end in transmission connection with a transmission shaft of the rotating motor (6), and the cloud platform (5) is installed at the other end of the rotating rod (7);
the rotating motor (6) and the cradle head (5) are in signal connection with the controller (4);
the controller (4) is in signal connection with the control module.
4. The machine vision based cardiopulmonary resuscitation compression depth feedback system of claim 3, wherein: be provided with mount pad (9) on casing (8) of host computer (2), mount pad (9) are the U type, the one end of rotary rod (7) is rotated through pivot (10) and is installed in mount pad (9), pivot (10) with rotary rod (7) set up perpendicularly, the one end of pivot (10) pass through the gear train with rotating electrical machines (6) transmission is connected.
5. The machine vision based cardiopulmonary resuscitation compression depth feedback system of claim 1, wherein: the feedback pad (1) is in a round cake shape.
6. The machine vision based cardiopulmonary resuscitation compression depth feedback system of claim 5, wherein: the reference mark comprises a plurality of two-dimensional codes (12) arranged on the upper surface and the lower surface of the feedback pad (1) for positioning and a plurality of rulers (13) longitudinally arranged on the side wall of the feedback pad (1).
7. The machine vision based cardiopulmonary resuscitation compression depth feedback system of claim 6, wherein: the two-dimensional codes (12) are uniformly distributed on the upper surface and the lower surface of the feedback pad (1) in a circumferential array;
the scales (13) are uniformly distributed along the outer side wall of the feedback pad (1).
8. The machine vision based cardiopulmonary resuscitation compression depth feedback system of claim 1, wherein: the host (2) further comprises a power supply module, a positioning module, a voice acquisition module and a wireless communication module, wherein the power supply module, the positioning module, the voice acquisition module and the wireless communication module are in signal connection with the control module.
9. The machine vision based cardiopulmonary resuscitation compression depth feedback system of claim 1, wherein: the control module is a DSP processor.
10. The machine vision based cardiopulmonary resuscitation compression depth feedback system of claim 1, wherein: the prompting module comprises a display screen (14) and a loudspeaker (15);
the display screen (14) is in signal connection with the control module through a display driving circuit;
the loudspeaker (15) is in signal connection with the control module through an audio power amplifier circuit.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110713123.XA CN113317975A (en) | 2021-06-25 | 2021-06-25 | Cardio-pulmonary resuscitation pressing depth feedback system based on machine vision |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110713123.XA CN113317975A (en) | 2021-06-25 | 2021-06-25 | Cardio-pulmonary resuscitation pressing depth feedback system based on machine vision |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114556447A (en) * | 2021-12-30 | 2022-05-27 | 焦旭 | Hand pressing depth detection method and device |
| CN114984456A (en) * | 2022-06-14 | 2022-09-02 | 山东大学齐鲁医院 | System and method for assisting cardiopulmonary resuscitation of emergency unmanned aerial vehicle |
-
2021
- 2021-06-25 CN CN202110713123.XA patent/CN113317975A/en not_active Withdrawn
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114556447A (en) * | 2021-12-30 | 2022-05-27 | 焦旭 | Hand pressing depth detection method and device |
| WO2023123213A1 (en) * | 2021-12-30 | 2023-07-06 | 焦旭 | Hand pressing depth measurement method and apparatus |
| CN114984456A (en) * | 2022-06-14 | 2022-09-02 | 山东大学齐鲁医院 | System and method for assisting cardiopulmonary resuscitation of emergency unmanned aerial vehicle |
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