CN106037692B - Micro-motion signal acquisition device, method and system - Google Patents
Micro-motion signal acquisition device, method and system Download PDFInfo
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- CN106037692B CN106037692B CN201610554676.4A CN201610554676A CN106037692B CN 106037692 B CN106037692 B CN 106037692B CN 201610554676 A CN201610554676 A CN 201610554676A CN 106037692 B CN106037692 B CN 106037692B
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- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/02—Detecting, measuring or recording pulse, heart rate, blood pressure or blood flow; Combined pulse/heart-rate/blood pressure determination; Evaluating a cardiovascular condition not otherwise provided for, e.g. using combinations of techniques provided for in this group with electrocardiography or electroauscultation; Heart catheters for measuring blood pressure
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- A61B5/02—Detecting, measuring or recording pulse, heart rate, blood pressure or blood flow; Combined pulse/heart-rate/blood pressure determination; Evaluating a cardiovascular condition not otherwise provided for, e.g. using combinations of techniques provided for in this group with electrocardiography or electroauscultation; Heart catheters for measuring blood pressure
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Abstract
The invention discloses a micro-motion signal acquisition device, method and system, wherein the method comprises the following steps: acquiring an air pressure value continuously acquired by an air pressure sensor arranged in a cavity made of a rigid material according to a specified sampling rate, wherein when the cavity is extruded by external force, the influence of extrusion on the air pressure in the cavity is greater than the influence of air leakage on the air pressure in the cavity; and judging the intensity and the change frequency of the inching signal according to the magnitude and the change frequency of the air pressure value. The pressure sensor is arranged in the cavity made of the rigid material to collect weak change of air pressure, the air in the cavity can generate pressure change due to extrusion, and compared with the flexible cavity in the prior art, the pressure change generated by the same micro motion is more obvious, and micro motion signals can be collected more sensitively; because the cavity is made of rigid materials, the air pressure sensor is directly arranged inside the cavity, the structure is simple and small, the use is convenient, and the anti-interference capability is stronger.
Description
Technical Field
The invention relates to the field of micro-motion signal acquisition, in particular to a micro-motion signal acquisition device, a micro-motion signal acquisition method and a micro-motion signal acquisition system.
Background
The acquisition device of micro-motion signals is placed under a pillow, a mattress or a bed sheet, a plurality of sensors for sensing external pressure changes by changing the internal pressure of the cavity by pressing the closed cavity are generally used for detecting body micro-motion signals during sleeping, further physiological information during sleeping such as heartbeat, respiration and rolling is obtained, the flexible material is generally adopted to form a sealed cavity, when the flexible cavity is pressed in the use process, the cavity wall is stressed and relaxed, when the cavity is slightly deformed, the change of the internal gas pressure is not obvious, the application and experience of the sensing modes are severely restricted by the characteristics of being pre-pressurized, the pressure is more sensitive, the good air tightness and the narrow linear measuring range are needed, and the like.
Disclosure of Invention
The invention mainly aims to provide a micro-motion signal acquisition device, method and system with low air tightness requirement.
In order to achieve the above object, the present invention provides a method for collecting micro-motion signals, including:
continuously acquiring air pressure values acquired by an air pressure sensor arranged in a cavity made of a rigid material according to a specified sampling rate; when the cavity is extruded by external force, the influence of the extrusion on the internal air pressure of the cavity is larger than the influence of the air leakage on the internal air pressure of the cavity;
and judging the intensity and the change frequency of the inching signal according to the magnitude and the change frequency of the air pressure value.
Further, the cavity is a closed cavity or an incompletely closed cavity.
Further, the manufacturing method of the cavity comprises the following steps:
an upper shell, a lower shell and an annular flexible support body are arranged;
the flexible support body is arranged between the upper shell and the lower shell and then sequentially connected to form the cavity.
Further, after the step of disposing the flexible support body between the upper case and the lower case and then sequentially connecting to form the cavity, it includes:
and a limiting device is arranged between the upper shell and the lower shell, and when the upper shell and the lower shell are positioned at a relative appointed position, the limiting device limits the relative position of any part between the upper shell and the lower shell to do relative separation movement.
Further, the cavity is a flat cavity.
The invention also provides a micro-motion signal acquisition device, which comprises a cavity and a pneumatic pressure sensor,
the cavity is made of rigid materials;
the air pressure sensor is arranged in the cavity, and continuously collects air pressure values in the cavity according to a specified sampling rate, wherein the size and the change frequency of the air pressure values correspond to the vibration intensity and the frequency of the inching signal; when the cavity is extruded by external force, the influence of the extrusion on the internal air pressure of the cavity is larger than the influence of the air leakage on the internal air pressure of the cavity.
Further, the cavity is a closed cavity or a non-fully closed cavity.
Further, the cavity comprises an upper shell, a lower shell and an annular flexible support body;
the flexible support body is arranged between the upper shell and the lower shell, and the upper shell, the lower shell and the flexible support body are sequentially connected to form the cavity.
Further, the acquisition device of the micro-motion signal also comprises a limiting device; when the upper shell and the lower shell are positioned at the relative appointed positions, the limiting device limits the relative position of any part between the upper shell and the lower shell to do relative separation movement.
Further, the cavity is a flat cavity.
Further, a wireless communication module and a battery are arranged in the cavity;
the wireless communication module is connected with the air pressure sensor and transmits the air pressure value or the related information thereof to the outside;
the battery supplies power to the wireless communication module and the air pressure sensor.
The invention provides a micro-motion signal acquisition system, which comprises an analyzer and a micro-motion signal acquisition device;
the micro-motion signal acquisition device comprises a cavity and a pneumatic pressure sensor,
the cavity is made of rigid materials;
the air pressure sensor is arranged in the cavity, and continuously collects air pressure values in the cavity according to a specified sampling rate, wherein the size and the change frequency of the air pressure values correspond to the vibration intensity and the frequency of the inching signal; when the cavity is extruded by external force, the influence of the extrusion on the internal air pressure of the cavity is larger than the influence of the air leakage on the internal air pressure of the cavity;
the analyzer receives the air pressure value continuously collected by the air pressure sensor according to the designated sampling rate, and judges the intensity and the change frequency of the inching signal according to the magnitude and the change frequency of the air pressure value.
Further, the cavity is a closed cavity or a non-fully closed cavity.
Further, the cavity comprises an upper shell, a lower shell and an annular flexible support body;
the flexible support body is arranged between the upper shell and the lower shell, and the upper shell, the lower shell and the flexible support body are sequentially connected to form the cavity.
Further, the acquisition device of the micro-motion signal also comprises a limiting device; when the upper shell and the lower shell are positioned at the relative appointed positions, the limiting device limits the relative position of any part between the upper shell and the lower shell to do relative separation movement.
Further, the cavity is a flat cavity.
Further, a wireless communication module and a battery are arranged in the cavity;
the wireless communication module is connected with the air pressure sensor and transmits the air pressure value or the related information thereof to the outside;
the battery supplies power to the wireless communication module and the air pressure sensor.
According to the micro-motion signal acquisition device, method and system, the air pressure sensor is arranged in the cavity made of the rigid material for acquisition, the cavity can generate pressure change due to extrusion in a certain direction, and compared with the flexible cavity in the prior art, the pressure change is more obvious, so that the air pressure value can be acquired more sensitively, and the intensity and frequency of the air pressure value correspond to the vibration signal; because the lateral wall of cavity is rigid material, the airtight requirement of cavity is not high for flexible cavity, and inside can directly set up air pressure sensor moreover, simple structure, air pressure sensor can directly be with the analog signal conversion digital signal of atmospheric pressure, and it is more convenient to use, and interference killing feature is stronger.
Drawings
FIG. 1 is a flow chart of a method for collecting micro-motion signals according to an embodiment of the invention;
FIG. 2 is a schematic diagram of a micro-signal acquisition device according to an embodiment of the present invention;
FIG. 3 is a schematic cross-sectional view of a micro-motion signal acquisition device according to an embodiment of the present invention;
fig. 4 is a schematic block diagram of a micro signal acquisition system according to an embodiment of the present invention.
The achievement of the objects, functional features and advantages of the present invention will be further described with reference to the accompanying drawings, in conjunction with the embodiments.
Detailed Description
It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.
Referring to fig. 1, an embodiment of the present invention provides a method for collecting micro-motion signals, including the steps of:
s1, continuously acquiring air pressure values acquired by an air pressure sensor 20 arranged in a cavity 10 made of a rigid material according to a specified sampling rate; when the cavity 10 is extruded by external force, the influence of extrusion on the internal air pressure of the cavity 10 is greater than the influence of gas leakage on the internal air pressure of the cavity;
s2, judging the intensity and the change frequency of the inching signal according to the magnitude and the change frequency of the air pressure value.
As described in step S1, the cavity 10 made of the rigid material is not required to be inflated and pressurized during production, and is not required to be subjected to air suction, depressurization and other treatments, and the rigid material can be a tough object such as hard plastic, metal and the like, and can be slightly deformed after being subjected to external force, and can be restored to its original shape after the force is removed. The air pressure sensor 20 may be directly installed in the cavity 10, and the air pressure sensor 20 may be installed in the cavity 10 by installing a mounting plate or other components, or the air pressure sensor 20 may be directly installed on the inner wall of the cavity 10. The above-mentioned "the influence of the extrusion on the internal air pressure of the cavity 10 is greater than the influence of the air leakage on the internal air pressure of the cavity 10" means that when the cavity 10 is extruded, the air in the cavity 10 is extruded, and in the extrusion process, if the cavity 10 is in a non-sealing state, the air leaks along the gap of the cavity 10, but the leakage rate is smaller than the influence of the air in the cavity 10 caused by extrusion, and the air pressure change in the cavity 10 is obviously collected by the air pressure sensor 20, otherwise, the accurate air pressure change is not easily collected, that is, the cavity 10 is preferably a closed cavity, but when the tightness of the cavity 10 is not strong, the air pressure sensor 20 can still be normally used as long as the gap is in the allowable range, and the data collection of the air pressure sensor 20 is not affected. The air pressure sensor 20 is generally a digital sensor, and is relatively simple to use, and does not require processes such as analog-to-digital conversion.
As described in the above step S2, the inching signal refers to a signal generated by vibration with smaller vibration intensity, such as vibration generated by heartbeat, vibration generated by respiration, and the like. The air pressure value collected by the air pressure sensor 20 can truly reflect the vibration condition of the object contacting the cavity 10, if the air pressure value is high, the vibration intensity of the object is high, if the change frequency of the air pressure value is high, the vibration frequency of the object is high, and the like, and the two air pressure values are positively correlated, so that whether the air pressure value collected by the air pressure sensor 20 is a true value of the external air pressure or not, the change of the air pressure value can reflect the vibration condition of the object contacting the cavity 10.
Referring to fig. 2 and 3, in the present embodiment, the method for manufacturing the cavity 10 includes:
s11, an upper shell 11, a lower shell 12 and an annular flexible support body 13 are arranged; the flexible support 13 is disposed between the upper and lower cases 11 and 12, and then sequentially connected to form the chamber 10.
As described in step S11, the flexible support 13 is disposed between the upper housing 11 and the lower housing 12, and when the upper housing 11 and the lower housing 12 are relatively pressed, the flexible support 13 is compressed, the air pressure in the cavity 10 is increased, but the increased air pressure can hardly cause any expansion increase of the cavity 10, so that the air pressure variation in the cavity 10 is maintained, and accordingly, the collection sensitivity of the micro-motion signal can be improved. In other embodiments, the cavity 10 may be formed in a ring shape, and the flexible support 13 may be spaced from the rigid housing.
In this embodiment, after the step S11 of disposing the flexible support 13 between the upper case 11 and the lower case 12 and then sequentially connecting the two cases to form the cavity 10, the method includes:
s12, a limiting device 14 is arranged between the upper shell 11 and the lower shell 12, and when the upper shell 11 and the lower shell 12 are positioned at a relative designated position, the limiting device 14 limits any position between the upper shell 11 and the lower shell 12 to perform relative separation movement.
As described in the above step S12, when one side of the cavity 10 is pressed downward, the opposite side thereof will tilt relatively, if the upper housing 11 is located above the lower housing 12, the tilting amplitude of the upper housing 11 will be generally larger than that of the lower housing 12, i.e. the pressed sides of the upper housing 11 and the lower housing 11 will move relatively close to each other, while the corresponding other sides will move relatively apart, so as to counteract the air pressure variation inside the cavity 10 caused by local pressure, and affect the sensitivity of the air pressure sensor 20 for acquiring air pressure values. The limiting device 14 is a structure for limiting the relative separation movement of the upper housing 11 and the lower housing 12, such as wrapping the cavity 10 with inelastic cloth, or providing a device for hooking connection between the upper housing 11 and the lower housing 12. The upper case 11 and the lower case 12 are positioned at opposite predetermined positions, and the chamber 10 is generally placed stationary on a plane, and when the flexible support 13 is in a natural state, the upper case 11 and the lower case 12 are positioned in relation to each other. In other embodiments, the upper housing 11 and the lower housing 12 may be positioned at opposite designated positions, i.e., the positional relationship between the upper housing 11 and the lower housing 12 when the cavity 10 is compressed in the axial direction of the flexible support 13 by a certain force. In any case, the limiting means 14 define that the flexible support body 13 can only be moved in compression in its axial direction.
In this embodiment, the cavity 10 is a flat cavity, which is convenient to be stressed, and when the cavity 10 is placed under a mattress to collect vibration signals of a human body, the flat cavity 10 is convenient to be placed. The flat shape can be cuboid, cake shape, ring shape, etc.
In a specific embodiment, the cavity 10 is placed under the mattress, the axis of the flexible support 13 is arranged along the vertical direction, when a user lies on the mattress, micro-motion signals generated by the user can be transmitted to the cavity 10 through the mattress, the cavity 10 is compressed to generate internal air pressure change, the air pressure sensor 20 is used for collecting the changed air pressure value, finally, vibration signals of the user are judged through the change frequency and the intensity of the air pressure value, and physiological signals of the user such as heart beat, respiration, rolling and the like can be analyzed from the vibration signals of the user.
In another embodiment, a single cavity 10 can be used as a detection tool for cardiopulmonary resuscitation, the cavity 10 is acted on the chest of a human body, and then cardiopulmonary resuscitation is performed on the human body by pressing the cavity 10, in this process, the cavity 10 and the air pressure sensor 20 can collect the action signals of cardiopulmonary resuscitation, and in the use process, the intensity and the frequency of the pressing signals of rescue actions can be analyzed, so that the implementation condition of cardiopulmonary resuscitation work can be judged, guidance can be performed according to the implementation condition, and the accuracy of the cardiopulmonary resuscitation work can be improved.
According to the method for collecting the micro-motion signals, the air pressure sensor 20 is arranged in the cavity 10 made of the rigid material for collecting, the cavity 10 can generate pressure change due to extrusion in a certain direction, and compared with the flexible cavity 10 in the prior art, the pressure change is more obvious, so that the change of the air pressure value can be collected more sensitively, and the intensity and the frequency of the air pressure value correspond to the vibration signals; because the lateral wall of cavity 10 is rigid material, the airtight requirement of cavity 10 is not high for flexible cavity 10, and inside can directly set up air pressure sensor 20 moreover, simple structure, air pressure sensor 20 can directly convert the analog signal of atmospheric pressure into digital signal, and it is more convenient to use, and interference killing feature is stronger.
Referring to fig. 2 and 3, an embodiment of the present invention provides a micro-motion signal acquisition device 100, including a cavity 10 and a gas pressure sensor 20, where the cavity 10 is a cavity 10 made of a rigid material; the air pressure sensor 20 is arranged in the cavity 10, and continuously collects air pressure values in the cavity 10 according to a specified sampling rate, wherein the magnitude and the change frequency of the air pressure values correspond to the vibration intensity and the frequency of the inching signal; when the cavity 10 is pressed by an external force, the influence of the pressing on the internal air pressure of the cavity 10 is larger than the influence of the air leakage on the internal air pressure of the cavity.
In this embodiment, the inching signal refers to a signal generated by vibration with smaller vibration intensity, such as vibration generated by heartbeat, vibration generated by respiration, and the like. The cavity 10 made of the rigid material does not need to be inflated and pressurized in the cavity 10 during production, and does not need to be subjected to treatments such as air suction, depressurization and the like, and the rigid material can be a tough object such as hard plastic, metal and the like, and can slightly deform after being subjected to external force, and can recover the original shape after the force is removed. The air pressure sensor 20 may be directly installed in the cavity 10, and the air pressure sensor 20 may be installed in the cavity 10 by installing a mounting plate or other components, or the air pressure sensor 20 may be directly installed on the inner wall of the cavity 10. The above-mentioned "the influence of the extrusion on the internal air pressure of the cavity 10 is greater than the influence of the air leakage on the internal air pressure of the cavity 10" means that when the cavity 10 is extruded, the air in the cavity 10 is extruded, if the cavity 10 is in a non-sealing state in the extrusion process, the air leaks along the gaps of the cavity 10, but the leakage rate is smaller than the influence of the air in the cavity 10 caused by extrusion, the air pressure change in the cavity 10 is obviously collected by the air pressure sensor 20, otherwise, the accurate air pressure change is not easily collected, that is, the cavity 10 is preferably a sealed cavity 10, but when the tightness of the cavity 10 is not strong, the air pressure sensor 20 can still be normally used as long as the gaps are in the allowable range, and the data collection of the air pressure sensor 20 is not affected. The air pressure sensor 20 is generally a digital sensor, and is relatively simple to use, and does not need to perform processes such as relatively processing the collected data. The air pressure value collected by the air pressure sensor 20 can truly reflect the vibration condition of the object contacting the cavity 10, if the air pressure value is high, the vibration intensity of the object is high, if the change frequency of the air pressure value is high, the vibration frequency of the object is high, and the like, and the two are positively correlated, so that the change of the air pressure value collected by the air pressure sensor 20 can reflect the vibration condition of the object contacting the cavity 10 no matter whether the air pressure value is the actual value of the external air pressure or not.
In this embodiment, the cavity 10 includes an upper housing 11, a lower housing 12, and an annular flexible support 13; the flexible support body 13 is disposed between the upper housing 11 and the lower housing 12, and the upper housing 11, the lower housing 12 and the flexible support body 13 are sequentially connected to form the cavity 10. The flexible supporting body 13 is disposed between the upper housing 11 and the lower housing 12, when the upper housing 11 and the lower housing 12 are relatively pressed, the flexible supporting body 13 is compressed, the air pressure in the cavity 10 is increased, but the increased air pressure can hardly cause any place of the cavity 10 to have a tendency of expansion increase, thereby maintaining the change of the air pressure in the cavity 10, and accordingly, the collection sensitivity of the micro-motion signals can be improved. In other embodiments, the cavity 10 may be formed in a ring shape, and the flexible support 13 may be spaced from the rigid housing.
In this embodiment, the above-mentioned micro-motion signal acquisition device further includes a limiting device, and when the upper housing 11 and the lower housing 12 are located at a relatively specified position, the limiting device 14 limits the relative position between any one of the upper housing 11 and the lower housing 12 to perform a relatively separated movement. When one side of the cavity 10 is pressed downward, the opposite side thereof will tilt relatively, if the upper housing 11 is located above the lower housing 12, the tilting amplitude of the upper housing 11 will be generally larger than that of the lower housing 12, i.e. the pressed sides of the upper housing 11 and the lower housing 11 will move relatively close to each other, while the corresponding other sides will move relatively apart, so as to reduce the air pressure variation in the cavity 10 and affect the accuracy of the air pressure sensor 20 for acquiring the air pressure value. The limiting device 14 is a structure for limiting the relative separation movement of the upper housing 11 and the lower housing 12, such as wrapping the cavity 10 with inelastic cloth, or providing a device for hooking connection between the upper housing 11 and the lower housing 12. The upper case 11 and the lower case 12 are positioned at opposite predetermined positions, and the chamber 10 is generally placed stationary on a plane, and when the flexible support 13 is in a natural state, the upper case 11 and the lower case 12 are positioned in relation to each other. In other embodiments, the upper housing 11 and the lower housing 12 may be positioned at opposite designated positions, i.e., the positional relationship between the upper housing 11 and the lower housing 12 when the cavity 10 is compressed in the axial direction of the flexible support 13 by a certain force. In any case, the limiting means 14 define that the flexible support body 13 can only be moved in compression in its axial direction.
In this embodiment, the cavity 10 is a flat cavity 10, which is convenient to be stressed, and when the cavity 10 is placed under a mattress to collect vibration signals of a human body, the flat cavity 10 is convenient to be placed. The flat shape can be cuboid, cake shape, ring shape, etc.
In this embodiment, a wireless communication module 40 and a battery 30 are disposed in the cavity 10; the wireless communication module 40 is connected with the air pressure sensor 20 and transmits the air pressure value or the related information thereof to the outside; the battery 30 powers the wireless communication module 40 and the air pressure sensor 20. The wireless communication module 40 can conveniently transmit the data acquired by the air pressure sensor 20 to the analysis device for data analysis, and is convenient to use. The above information related to the barometric pressure generally includes battery level information and the like to know the usable time of the device.
In a specific embodiment, the above-mentioned micro-motion signal acquisition device 100 is arranged under a mattress, the axis of the flexible support body 13 is arranged along the vertical direction, when a human body lies on the mattress, micro-motion pressure signals generated by the human body are transmitted to the cavity 10 through the mattress, the cavity 10 is compressed to generate internal air pressure changes, the air pressure sensor 20 acquires the changed air pressure values, finally, vibration signals of the human body are judged through the change frequency and the change intensity of the air pressure values, and physiological signals of the human body such as heart beat, respiration, rolling and the like can be analyzed from the vibration signals of the human body.
In another embodiment, the single micro-motion signal acquisition device 100 can be used as a detection tool for cardiac resuscitation, the micro-motion signal acquisition device 100 is applied to the chest of a human body, and then the heart-beat resuscitation is performed on the human body through the micro-motion signal compression acquisition device 100, in the process, the cavity 10 and the air pressure sensor 20 can acquire the vibration signals of the human body, and in the use process, the intensity and the frequency of the compression signals of the rescue actions can be analyzed, so that the implementation condition of the heart-lung resuscitation is judged, guidance is performed according to the implementation condition, and the accuracy of the heart-beat resuscitation is improved.
In the micro-motion signal acquisition device 100 of the embodiment, the air pressure sensor 20 is arranged in the cavity 10 made of rigid material for acquisition, the cavity 10 can generate pressure change due to extrusion in a certain direction, and compared with the flexible cavity 10 in the prior art, the pressure change is more obvious, so that the air pressure value can be acquired more sensitively, and the intensity and frequency of the air pressure value correspond to the vibration signal; because the lateral wall of cavity 10 is rigid material, the airtight requirement of cavity 10 is not high for flexible cavity 10, and inside can directly set up air pressure sensor 20 moreover, simple structure, air pressure sensor 20 can directly convert the analog signal of atmospheric pressure into digital signal, and it is more convenient to use, and interference killing feature is stronger.
Referring to fig. 4, the embodiment of the present invention further provides a micro-motion signal acquisition system, including an analyzer 200 and a micro-motion signal acquisition device 100; the micro-motion signal acquisition device 100 comprises a cavity 10 and a pneumatic sensor 20, wherein the cavity 10 is made of a rigid material and is a cavity 10; the air pressure sensor 20 is arranged in the cavity 10, and continuously collects air pressure values in the cavity 10 according to a specified sampling rate, wherein the magnitude and the change frequency of the air pressure values correspond to the vibration intensity and the frequency of the inching signal; when the cavity 10 is extruded by external force, the influence of extrusion on the internal air pressure of the cavity 10 is greater than the influence of gas leakage on the internal air pressure of the cavity; the analyzer 200 receives the air pressure value collected by the air pressure sensor 20, and determines the intensity and the change frequency of the inching signal according to the magnitude and the change frequency of the air pressure value.
In the embodiment of the present invention, the inching signal refers to a signal generated by vibration with smaller vibration intensity, such as vibration generated by heartbeat, vibration generated by respiration, and the like. The cavity 10 made of the rigid material does not need to be inflated and pressurized in the cavity 10 during production, and does not need to be subjected to treatments such as air suction, depressurization and the like, and the rigid material can be a tough object such as hard plastic, metal and the like, and can slightly deform after being subjected to external force, and can recover the original shape after the force is removed. The air pressure sensor 20 may be directly installed in the cavity 10, and the air pressure sensor 20 may be installed in the cavity 10 by installing a mounting plate or other components, or the air pressure sensor 20 may be directly installed on the inner wall of the cavity 10. The above-mentioned "the influence of the extrusion on the internal air pressure of the cavity 10 is greater than the influence of the air leakage on the internal air pressure of the cavity 10" means that when the cavity 10 is extruded, the air in the cavity 10 is extruded, and in the extrusion process, if the cavity 10 is in a non-sealing state, the air leaks along the gap of the cavity 10, but the leakage rate is smaller than the influence of the air in the cavity 10 caused by extrusion, and the air pressure sensor 20 in the cavity 10 obviously collects, otherwise, the accurate air pressure change is not easy to collect, that is, the cavity 10 is preferably a sealed cavity 10, but when the sealing performance of the cavity 10 is not strong, the air pressure sensor 20 can still be normally used as long as the gap is in an allowable range, and the data collection of the air pressure sensor 20 is not affected. The air pressure sensor 20 is generally a digital sensor, and is relatively simple to use, and does not need to perform processes such as relatively processing the collected data. The air pressure value collected by the air pressure sensor 20 can truly reflect the vibration condition of the object contacting the cavity 10, if the air pressure value is high, the vibration intensity of the object is high, if the change frequency of the air pressure value is high, the vibration frequency of the object is high, and the two are positively correlated, so that the change of the air pressure value collected by the air pressure sensor 20 can reflect the vibration condition of the object contacting the cavity 10 no matter whether the air pressure value is the real value of the external air. The analyzer 200 may be a computer or a smart phone, etc., and is provided with corresponding analysis software for analyzing the forehead pressure value collected by the air pressure sensor, converting the forehead pressure value into a vibration signal, and further analyzing the vibration signal to obtain physiological signals of a human body, etc.
In this embodiment, the cavity 10 includes an upper housing 11, a lower housing 12, and an annular flexible support 13; the flexible support body 13 is disposed between the upper housing 11 and the lower housing 12, and the upper housing 11, the lower housing 12 and the flexible support body 13 are sequentially connected to form the cavity 10. The flexible supporting body 13 is disposed between the upper housing 11 and the lower housing 12, when the upper housing 11 and the lower housing 12 are relatively pressed, the flexible supporting body 13 is compressed, the air pressure in the cavity 10 is increased, but the increased air pressure can hardly cause any place of the cavity 10 to have a tendency of expansion increase, thereby maintaining the change of the air pressure in the cavity 10, and accordingly, the collection sensitivity of the micro-motion signals can be improved. In other embodiments, the cavity 10 may be formed in a ring shape, and the flexible support 13 may be spaced from the rigid housing.
In this embodiment, the above-mentioned micro-motion signal acquisition device further includes a limiting device, and when the upper housing 11 and the lower housing 12 are located at a relatively specified position, the limiting device 14 limits the relative position between any one of the upper housing 11 and the lower housing 12 to perform a relatively separated movement. When one side of the cavity 10 is pressed downward, the opposite side thereof will tilt relatively, if the upper housing 11 is located above the lower housing 12, the tilting amplitude of the upper housing 11 will be generally larger than that of the lower housing 12, i.e. the pressed sides of the upper housing 11 and the lower housing 11 will move relatively close to each other, while the corresponding other sides will move relatively apart, so as to reduce the air pressure variation in the cavity 10 and affect the accuracy of the air pressure sensor 20 for acquiring the air pressure value. The limiting device 14 is a structure for limiting the relative separation movement of the upper housing 11 and the lower housing 12, such as wrapping the cavity 10 with inelastic cloth, or providing a device for hooking connection between the upper housing 11 and the lower housing 12. The upper case 11 and the lower case 12 are positioned at opposite predetermined positions, and the chamber 10 is generally placed stationary on a plane, and when the flexible support 13 is in a natural state, the upper case 11 and the lower case 12 are positioned in relation to each other. In other embodiments, the upper housing 11 and the lower housing 12 may be positioned at opposite designated positions, i.e., the positional relationship between the upper housing 11 and the lower housing 12 when the cavity 10 is compressed in the axial direction of the flexible support 13 by a certain force. In any case, the limiting means 14 define that the flexible support body 13 can only be moved in compression in its axial direction.
In this embodiment, the cavity 10 is a flat cavity 10, which is convenient to be stressed, and when the cavity 10 is placed under a mattress to collect vibration signals of a human body, the flat cavity 10 is convenient to be placed. The flat shape can be cuboid, cake shape, ring shape, etc.
In this embodiment, a wireless communication module 40 and a battery 30 are disposed in the cavity 10; the wireless communication module 40 is connected with the air pressure sensor 20 and transmits the air pressure value to the outside in a wireless manner; the battery 30 powers the wireless communication module 40 and the air pressure sensor 20. The wireless communication module 40 can conveniently transmit the data acquired by the air pressure sensor 20 to the analysis device for data analysis, and is convenient to use. The above information related to the barometric pressure generally includes battery level information and the like to know the usable time of the device.
In a specific embodiment, the above-mentioned micro-motion signal acquisition device 100 is arranged under a mattress, the axis of the flexible support body 13 is arranged along the vertical direction, when a human body lies on the mattress, micro-motion pressure signals generated by the human body are transmitted to the cavity 10 through the mattress, the cavity 10 is compressed to generate internal air pressure changes, the air pressure sensor 20 acquires the changed air pressure values, finally, vibration signals of the human body are judged through the change frequency and the change intensity of the air pressure values, and physiological signals of the human body such as heart beat, respiration, rolling and the like can be analyzed from the vibration signals of the human body.
In another embodiment, the single micro-motion signal acquisition device 100 can be used as a detection tool for cardiac resuscitation, the micro-motion signal acquisition device 100 is applied to the chest of a human body, and then the heart-beat resuscitation is performed on the human body through the micro-motion signal compression acquisition device 100, in the process, the cavity 10 and the air pressure sensor 20 can acquire the vibration signals of the human body, and in the use process, the intensity and the frequency of the compression signals of the rescue actions can be analyzed, so that the implementation condition of the heart-lung resuscitation is judged, guidance is performed according to the implementation condition, and the accuracy of the heart-beat resuscitation is improved.
In the micro-motion signal acquisition system of the embodiment, the air pressure sensor 20 is arranged in the cavity 10 made of rigid materials for acquisition, the cavity 10 can generate pressure change due to extrusion in a certain direction, and compared with the flexible cavity 10 in the prior art, the pressure change is more obvious, so that the air pressure value can be acquired more sensitively, and the intensity and frequency of the air pressure value correspond to the vibration signal; because the lateral wall of cavity 10 is rigid material, the airtight requirement of cavity 10 is not high for flexible cavity 10, and inside can directly set up air pressure sensor 20 moreover, simple structure, air pressure sensor 20 can directly convert the analog signal of atmospheric pressure into digital signal, and it is more convenient to use, and interference killing feature is stronger.
The foregoing description is only of the preferred embodiments of the present invention and is not intended to limit the scope of the invention, and all equivalent structures or equivalent processes using the descriptions and drawings of the present invention or directly or indirectly applied to other related technical fields are included in the scope of the invention.
Claims (8)
1. The method for acquiring the micro-motion signal is characterized by comprising the following steps of:
acquiring an air pressure value continuously acquired by an air pressure sensor arranged in a cavity made of a rigid material according to a specified sampling rate; when the cavity is extruded by external force, the influence of the extrusion on the internal air pressure of the cavity is larger than the influence of the air leakage on the internal air pressure of the cavity;
judging the intensity and the change frequency of the inching signal according to the magnitude and the change frequency of the air pressure value;
the manufacturing method of the cavity comprises the following steps:
an upper shell, a lower shell and an annular flexible support body are arranged;
the flexible supporting body is arranged between the upper shell and the lower shell and then sequentially connected to form the cavity;
after the step of disposing the flexible support body between the upper case and the lower case and then sequentially connecting the upper case and the lower case to form the cavity, the method comprises the steps of:
and a limiting device is arranged between the upper shell and the lower shell, and when the upper shell and the lower shell are positioned at a relatively appointed position, the limiting device limits the relative position of any part between the upper shell and the lower shell to perform relative separation movement.
2. The method of claim 1, wherein the cavity is a closed cavity or a non-fully closed cavity.
3. The method of any one of claims 1-2, wherein the cavity is a flat cavity.
4. A micro-motion signal acquisition device is characterized by comprising a cavity and a pneumatic pressure sensor,
the cavity is made of rigid materials;
the air pressure sensor is arranged in the cavity, and continuously collects air pressure values in the cavity according to a specified sampling rate, wherein the size and the change frequency of the air pressure values correspond to the vibration intensity and the frequency of the inching signal; when the cavity is extruded by external force, the influence of the extrusion on the internal air pressure of the cavity is larger than the influence of the air leakage on the internal air pressure of the cavity; the device also comprises a limiting device; when the upper shell and the lower shell are positioned at the relative appointed positions, the limiting device limits the relative position of any part between the upper shell and the lower shell to do relative separation movement;
the cavity comprises an upper shell, a lower shell and an annular flexible support body;
the flexible support body is arranged between the upper shell and the lower shell, and the upper shell, the lower shell and the flexible support body are sequentially connected to form the cavity.
5. The micro-motion signal acquisition device of claim 4, wherein the cavity is a closed cavity or a non-fully closed cavity.
6. The micro-motion signal acquisition device of claim 4, wherein the cavity is a flat cavity.
7. The micro-motion signal acquisition device according to claim 4, wherein a wireless communication module and a battery are arranged in the cavity;
the wireless communication module is connected with the air pressure sensor and transmits the air pressure value or the related information thereof to the outside; the battery supplies power to the wireless communication module and the air pressure sensor.
8. The micro-motion signal acquisition system is characterized by comprising an analyzer and a micro-motion signal acquisition device;
the micro-motion signal acquisition device is as defined in any one of the preceding claims 4 to 7;
the analyzer receives the air pressure value continuously collected by the air pressure sensor according to the designated sampling rate, and judges the intensity and the change frequency of the inching signal according to the magnitude and the change frequency of the air pressure value.
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| CN102429648A (en) * | 2011-09-21 | 2012-05-02 | 北京大学深圳研究生院 | Respiration and heartbeat monitoring pillow during sleep |
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