CN210493476U - Baby mattress with heart rate respiration detection function - Google Patents
Baby mattress with heart rate respiration detection function Download PDFInfo
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- CN210493476U CN210493476U CN201920793339.XU CN201920793339U CN210493476U CN 210493476 U CN210493476 U CN 210493476U CN 201920793339 U CN201920793339 U CN 201920793339U CN 210493476 U CN210493476 U CN 210493476U
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Abstract
The utility model discloses a baby mattress with heart rate respiration detection, wherein a mattress body is provided with an integrated structure, a vacuum layer and a concave air groove which are communicated, and an acoustic surface wave sensor transmits signals between a signal transmission antenna module and a reader; the piezoelectric substrate is arranged on the lower side of the concave air groove, the top surface of the piezoelectric substrate is in contact with the bottom of the concave air groove, and the input interdigital transducers and the output interdigital transducers are symmetrically distributed at two ends of the piezoelectric substrate and are respectively arranged on the left side and the right side of the concave air groove. The utility model discloses can realize passive wireless real-time detection, adopt non-contact to measure in the testing process, to the data that gather pass through signal processing can be real-time quick accurate detect baby's rhythm of the heart and breathe the situation data, the injury to the baby of uncertain factors such as the detection electromagnetic wave of having avoided high strength and electric leakage.
Description
Technical Field
The utility model relates to a health status data acquisition device field, in particular to baby's mattress with detection is breathed to rhythm of the heart.
Background
With the development of science and technology, modern science and technology are gradually merged into the daily life of people, the heart rate and the breathing condition of a human body are monitored in real time by utilizing a plurality of simple and convenient scientific devices, particularly, all organs of infants are in a rapid development stage, the heart rate and the breathing have a vital function on the body health of the infants, and meanwhile, the heart rate and the breathing are also the most important physiological parameters for the body development of the infants, so that the following conditions exist for the heart rate and the breathing detection mode at present. 1. Heart rate and breath are detected by a plurality of wearable electronic products on the market at present, however, all the wearable detection devices are in direct or indirect contact with the bodies of infants, and the wearable devices are heavy or complex, so that the wearable devices are not convenient and safe to wear for the infants just born; 2. adopting infrared sequence image to carry out omnibearing scanning analysis on heart rate and respiration of human body, and adopting non-contact measurement; 3. a radar type non-contact measurement system is adopted, electromagnetic radiation is emitted through a radiation source, signals reflected back from a body are received, sampling analysis is carried out on the signals, heart rate and respiration data are obtained, however, the mode 2 and the mode 3 are non-contact measurement, and radiation such as generated electromagnetic waves has great harm to the body of a newborn baby.
In the prior art, chinese patent publication No. CN101822542A discloses a chest and abdomen respiration detector, in which a piezoelectric ceramic sheet is bound to the chest, the volume of the chest changes when a subject breathes, and further the surface pressure of the piezoelectric ceramic sheet changes, and the piezoelectric ceramic sheet converts the pressure signal into an electrical signal and outputs the electrical signal through a lead. Although the method is portable and flexible, the fixation has strong constraint inductance, and the transmission line can also influence the movement of the tested object; and requires power supply, easily introducing high voltage hazards.
Chinese patent CN106175695A discloses a detection system for sleep apnea syndrome, which uses a finger end signal acquisition device to acquire photoelectric signals representing blood volume changes in a finger end blood vessel, converts the photoelectric signals into photoelectric volume pulse wave data, and wirelessly transmits the photoelectric volume pulse wave data to the signal conversion module in real time; the signal conversion module receives photoplethysmography data output by the finger tip signal acquisition device, obtains oxyhemoglobin saturation data, heart rate variability data and pulse rate data through filtering processing and calculation, and transmits the data to the data processing module; the data processing module is based on output sleep state data such as photoplethysmography data and respiratory event data, however this kind of measuring mode also needs mains operated, and collection system needs and human body carry out direct contact in the acquisition process, also can produce some influences to baby's health, and whole measuring process is loaded down with trivial details relatively, can produce certain error to the measuring result in complicated information conversion process.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a baby's mattress with detection is breathed to rhythm of the heart to not enough among the prior art to solve above-mentioned problem.
The utility model provides a technical problem can adopt following technical scheme to realize:
a baby mattress with heart rate respiration detection function comprises a mattress body, an acoustic surface wave sensor, a signal transmission antenna module and a reader, wherein a vacuum layer is arranged inside the mattress body, the bottom of the vacuum layer is downwards sunken to form a concave air groove, and the caliber of the bottom of the concave air groove is smaller than that of the top of the concave air groove; the surface acoustic wave sensor is arranged in the mattress body and comprises a piezoelectric substrate, an input interdigital transducer and an output interdigital transducer, wherein the piezoelectric substrate is arranged on the lower side of the concave air groove, the top surface of the piezoelectric substrate is contacted with the bottom of the concave air groove, and the input interdigital transducer and the output interdigital transducer are respectively and symmetrically distributed at two ends of the piezoelectric substrate and are respectively arranged on the left side and the right side of the concave air groove; the surface acoustic wave sensor is electrically connected with the signal transmission antenna module, and the signal transmission antenna module is used for signal transmission between the surface acoustic wave sensor and the reader.
Furthermore, the signal transmission antenna module comprises a signal receiving antenna and a signal transmitting antenna, the signal receiving antenna and the signal transmitting antenna are respectively connected with the input interdigital transducer and the output interdigital transducer, the signal receiving antenna is used for receiving an excitation signal transmitted by the reader, and the signal transmitting antenna is used for transmitting a signal output by the output interdigital transducer to the reader.
Furthermore, the concave air grooves are of strip structures, the concave air grooves are formed in the width direction of the mattress body, the piezoelectric substrate is arranged in the length direction of the mattress body, and the plurality of surface acoustic wave sensors are sequentially arranged below the concave air grooves in an array mode in the width direction of the mattress body.
Furthermore, the thickness of the vacuum layer is 2-5 cm.
Further, the piezoelectric substrate is a lithium niobate substrate, the thickness of the piezoelectric substrate is 0.1mm, the width of the piezoelectric substrate is 0.5mm, and the length of the piezoelectric substrate is 25 mm; the interdigital of the input interdigital transducer and the interdigital of the output interdigital transducer are both 20 μm.
Furthermore, the surface acoustic wave sensor is a delay line type surface acoustic wave sensor.
Further, the vacuum layer is arranged in the mattress body and arranged in the middle of the mattress body, a base is further arranged in the mattress body, the base is arranged below the vacuum layer, and the surface acoustic wave sensor is fixed on the lower side of the vacuum layer through the base.
Compared with the prior art, the beneficial effects of the utility model are as follows:
(1) this device is non-contact measuring device, and the conversion of heartbeat breathing pressure signal and signal of telecommunication can be realized to the surface acoustic wave sensor of adoption, need not the power supply and can realize, keeps apart detection device and baby through the vacuum layer and makes detection device need not with detected object direct contact, has avoided dangerous factors such as electric leakage, and factor of safety is high, can not appear breaking down yet and lead to the condition that data do not record.
(2) The device adopts the surface acoustic wave device with the antenna as a detection sensor, can work only by giving a certain inquiry exciting signal to an external reader, does not need to provide a power supply for the device, and is a passive wireless device.
(3) The device adopts a delay line type surface acoustic wave sensor, signals output by the surface acoustic wave sensor are subjected to signal processing such as morphological filtering, autocorrelation operation, peak-to-peak measurement, low-pass filtering and the like, heart rate and respiration data are finally obtained, and finally, corresponding assessment and corresponding control are carried out on a baby box according to the body condition of a baby corresponding to the heart rate and respiration data of the baby; the sensor that this device adopted is high to the pressure variation detection sensitivity that heart rate and breathing arouse to adopted the vacuum layer to carry out little pressure conduction, be convenient for extract the heart rate and the breathing situation information of detection person from feedback information.
(4) The utility model discloses frequency and the vibration according to breathing and heartbeat in the aspect of signal detection have proposed a method that breathes and heartbeat detect simultaneously (respiratory frequency is about the fourth of heartbeat frequency under the normal condition, and the vibration that breathes and produce is usually bigger than the vibration that the heartbeat produced). The signal processing module divides the acoustic surface wave sensor into two paths of heart rate respiration signals, and the signal processing of Kalman filtering can obtain the heart rate respiration signals without noise: one path adopts morphological filtering, autocorrelation operation and peak-to-peak interval extraction to obtain heart rate information; and the other path of the signal carries out low-pass filtering processing on the heart rate respiration signal after the noise is removed to obtain the respiration information.
(5) The device has good linearity in an effective measurement range, and has the characteristics of high stability, low power consumption and the like when working under the normal temperature condition. The whole volume is small, the cost is low, the operation is convenient and simple, and the use is convenient.
Drawings
Fig. 1 is a schematic structural view of a baby mattress with heart rate respiration detection of the present invention.
Fig. 2 is a partial cross-sectional view of a baby mattress with heart rate breath detection of the present invention.
Fig. 3 is a schematic structural diagram of the surface acoustic wave sensor according to the present invention.
Fig. 4 is a flowchart of a control method of the baby mattress with heart rate respiration detection of the present invention.
Detailed Description
In order to make the technical means, creation features, achievement purposes and functions of the present invention easy to understand, the present invention is further described below with reference to the following embodiments.
Referring to fig. 1-4, the utility model discloses a baby's mattress with detection is breathed to rhythm of heart, include mattress body 1, surface acoustic wave sensor 4, signal transmission antenna module and read ware 6. The vacuum air cushion layer, the surface acoustic wave sensor, the signal transmission antenna module, the signal processing module and the external real-time data display are sequentially connected. The inside of mattress body is equipped with vacuum layer 2, and the bottom undercut of vacuum layer 2 forms concave air groove 3, and the bore of concave air groove 3 bottom is less than the bore at its top. The concave air groove 3 and the vacuum layer 2 are of an integrated structure and are communicated with each other, and the concave air groove is used as a force application point when a pressure sensor detects, and can concentrate the minute pressure generated by heartbeat and respiration; the structure with large upper part and small lower part can concentrate the stress points of acting force, so that the micro pressure generated by the heartbeat and the breath of a human body extrudes the air in the vacuum layer, all the force is concentrated to the concave air groove 3, the measurement is convenient, and the sensitivity is improved. The vacuum air cushion layer is arranged on the top layer of the mattress, so that the vacuum air cushion layer is prevented from being collided by the hard mattress in the process of horizontally placing the baby, the buffer function is realized, the direct contact between the sensor and the body is avoided, and the comfort of the mattress is improved; on the other hand, the micro heartbeat and respiratory pressure can be transmitted in real time, and the heartbeat and frequency can be accurately detected when the surface acoustic wave sensor is used for measuring. Mattress body and vacuum layer have constituted the baby's mattress's of heart rate respiration detection testing platform jointly, and the material of adoption is with frivolous as the benefit, and its main effect just can pass power, transmits the produced little power of heart and lung in the baby's body to surface acoustic wave sensor test point position. The concave air groove is mainly used for enabling the micro pressure generated by the heart and the lung of the infant to push the air in the vacuum layer to flow into the groove, so that the sensor can detect weak pressure change, and the measurement sensitivity and accuracy are improved. The surface acoustic wave sensor is electrically connected with the signal transmission antenna module. The signal transmission antenna module is used for signal transmission between the surface acoustic wave sensor and the reader. The reader is mainly responsible for on the one hand transmitting excitation signal and impels the sensor to carry out measurement work, and on the other hand is responsible for collecting the signal that the sensor fed back, collects all information that the sensor was gathered simultaneously, and reader and sensor can carry out real-time information acquisition at the distance of 3 ~ 5 meters under general condition.
The signal processing module divides the heart rate respiration signals collected by the surface acoustic wave sensor into two paths, and performs Kalman filtering signal processing to obtain the heart rate respiration signals without noise; the signal is divided into two identical paths of signals, one path of signal is connected into a form filter circuit, then an output signal is connected into a controller to carry out self-correlation operation and peak-to-peak interval extraction, and finally the controller is used for collecting information, namely heart rate information. And the other path of the heart rate respiration signals after the noise removal is accessed to a low-pass filter circuit to be subjected to low-pass filtering twice to obtain the respiration information.
The external real-time data display is to perform D/A conversion on the two paths of information after signal processing to obtain accurate heart rate and respiration data of the baby, and then evaluate the health state of the baby by analyzing the heart rate and the respiration data of the baby.
The surface acoustic wave sensor is arranged in the mattress body and comprises a piezoelectric substrate 43, an input interdigital transducer 42 capable of receiving signals, an output interdigital transducer 41 for emitting signals and a peripheral protection device. The interdigital transducer is a delay line type interdigital transducer, and the interdigital transducer is connected with an antenna of the radio frequency transmitting and receiving unit. The piezoelectric substrate 43 is disposed on the lower side of the concave air groove 3 and the top surface thereof touches the bottom of the concave air groove 3. The input interdigital transducer 42 and the output interdigital transducer 41 are respectively symmetrically distributed at both ends of the piezoelectric substrate 43 and are respectively disposed at the left and right sides of the concave air groove 3.
The signal transmission antenna module transmits an external excitation signal to the surface acoustic wave sensor to prompt the sensor to work on one hand, and receives a signal fed back by the surface acoustic wave sensor on the other hand. The signal transmission antenna module comprises two signal transmitters, namely a signal receiving antenna and a signal transmitting antenna 7, wherein the receiving antenna and the signal transmitting antenna are both positioned on the piezoelectric material substrate and are miniature antennas. The signal receiving antenna and the signal transmitting antenna are respectively connected with the input interdigital transducer and the output interdigital transducer. The signal receiving antenna is used for receiving an excitation signal transmitted by the reader, and the signal transmitting antenna is used for transmitting a signal output by the output interdigital transducer to the reader.
The concave air groove is of a strip-shaped structure and is arranged on the lower side of the vacuum layer, and the concave air groove is formed in the width direction of the mattress body. The piezoelectric substrate is arranged along the length direction of the mattress body, and the plurality of surface acoustic wave sensors are sequentially arranged below the concave air grooves in an array mode along the width direction of the mattress body. The array measurement has the advantages that the data of each sensor can be analyzed, a more accurate value can be obtained after the data are finally corrected by adopting a reasonable algorithm, different results can be obtained due to the difference of the positions of the sensors, and the measurement error can be greatly reduced through the array design.
The signal transmission of the surface acoustic wave sensor is completed through a micro transmission line of a base band, one end of the transmission line is connected with the interdigital transducer, and the other end of the transmission line is directly connected with the micro antenna; the sum of the lengths of the miniature antennas of the signal transmission antenna modules is about 28mm, the miniature antennas are stored in the gaps on the edges of the sensors, the reader is provided with a plurality of channels to receive signals fed back by the sensors, and all the signals are collected in the reader.
The vacuum layer is arranged in the mattress body and in the middle of the top layer of the mattress body, namely the vacuum layer is arranged in the mattress body and on one side close to the contact with the baby. The shape of the vacuum layer is the interval from the shoulder to the hip when the baby lies down, so that the interference of the disturbance generated elsewhere on the detection is reduced. For the detection sensitivity, the smaller the distance between the vacuum layer and the top surface of the mattress body is, the better the distance is, so that the loss of acting force can be reduced, the distance between the vacuum layer and the top surface is 0.3-0.7 cm, and the distance can be set to be 0.5cm during actual production. Still be equipped with the base in the mattress body, the below on vacuum layer is located to the base, and the surface acoustic wave sensor passes through the base and glues the downside that the viscose was fixed in the vacuum layer. The height of the base is determined by the concave air groove so that the bottom of the concave groove just contacts the force point of the surface acoustic wave sensor.
The thickness of the vacuum layer is 2-5 cm, and non-contact measurement is really realized. The mattress body is covered with a protective frame 5, which mainly protects the baby.
The piezoelectric substrate had a thickness of 0.1mm, a width of 0.5mm and a length of 25 mm.
The input interdigital transducer receives an inquiry signal from an external reader, converts the signal into a surface acoustic wave signal, the surface acoustic wave is transmitted on the piezoelectric material substrate and is mixed with the surface acoustic wave signal generated by heartbeat and respiratory pressure and then is transmitted to the output interdigital transducer, and the output interdigital transducer converts the received signal into an electromagnetic wave signal which is transmitted to the external reader by a miniature antenna connected with the output interdigital transducer. The utility model discloses in the lithium niobate substrate of piezoelectric material for having better electromechanical coupling coefficient that adopts, piezoelectricity basement is the lithium niobate substrate promptly, and the thickness of piezoelectricity basement is about 0.1mm, and wide being 0.5mm, length are 25mm, and the interdigital of input interdigital transducer and output interdigital transducer is 20 microns. The pressure generated by heartbeat and respiration is 0-0.2N, so that the measurement of the tiny pressure is realized by utilizing the piezoelectric effect of the lithium niobate and the passive wireless transmission of the surface acoustic wave.
The surface acoustic wave sensor is a delay line type surface mount passive wireless surface acoustic wave pressure sensor, and is mainly sequentially placed in a concave air groove in an array mode for real-time monitoring.
The utility model discloses when using, put the baby to testing platform's mattress body back on, read the ware and send excitation signal to the input interdigital transducer, transmit this signal conversion surface acoustic wave signal and the piezoelectric material's that is in piezoelectricity basement surface after the surface acoustic wave sensor receives external inquiry signal. The acoustic surface wave signal is superposed with a pressure signal generated by heartbeat and respiration of the baby, and then the signal is converted into an electromagnetic wave signal by the output interdigital transducer and transmitted to the reader through the signal transmitting antenna. As the baby can generate certain pressure when put on the detection platform, the signal detected by the acoustic surface wave sensor is the signal generated by the pressure of the baby, and the signal at the moment is used as an initial reference signal. When the baby is in a resting state, the pressure in the vacuum layer is changed by the micro pressure generated by the heartbeat and the breath of the baby, and the pressure change generated in the concave air groove is the micro pressure conducted by the heartbeat and the breath, so that the sensitive surface acoustic wave signal is changed. After the surface acoustic wave signal is superposed with pressure signals generated by heartbeat and respiration, the signals are converted into electromagnetic wave signals by the output interdigital transducer and transmitted to a reader through the signal transmitting antenna. The reader accesses a series of collected heart rate respiration signals into the filter circuit to remove noise, and the signals subjected to noise removal are accessed into the single chip microcomputer to be judged to judge whether the signals are effective heart rate respiration signals. Because the signals are influenced by factors such as turning over of the body of the baby and the like sometimes, if the signals are effective signals, the signals are processed in two ways, and one way is processed by signals such as morphological filtering, peak-to-peak value measurement and the like, so that heart rate data is finally obtained; and the other path of the data is subjected to low-pass filtering twice to obtain respiratory frequency data, then the measured heart rate data and respiratory data are fed back to the control terminal, and finally corresponding evaluation is carried out according to the heart rate and respiratory data of the infant and the physical condition of the infant and corresponding control is carried out on the infant box. Otherwise, when the signal is an invalid signal, the reader sends out an excitation signal again to prompt the surface acoustic wave sensor to start working and receive the heart rate respiration signal fed back by the sensor.
The utility model discloses utilize the surface acoustic wave to receive structural design and sensor parameter detection a little, detect baby's rhythm of the heart and breathe simultaneously and carry out data acquisition through the surface acoustic wave sensor, detection device does not need mains operated, the transmission of detected signal adopts the wireless transmission form, detection device adopts non-contact to measure in the testing process, need not to wear tedious wearable equipment, can not produce electromagnetic radiation yet and produce the influence to the baby body, only need put the infant to put on the intellectual detection system mattress who has equipped the surface acoustic wave sensor and just can be real-time quick accurate the rhythm of the heart that detects the baby and breathe situation data.
The basic principles and the main features of the invention and the advantages of the invention have been shown and described above. It will be understood by those skilled in the art that the present invention is not limited to the above embodiments, and that the foregoing embodiments and descriptions are provided only to illustrate the principles of the present invention without departing from the spirit and scope of the present invention. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (7)
1. An infant mattress with heart rate breath detection, characterized by: the mattress comprises a mattress body, an acoustic surface wave sensor, a signal transmission antenna module and a reader, wherein a vacuum layer is arranged in the mattress body, the bottom of the vacuum layer is downwards sunken to form a concave air groove, and the caliber of the bottom of the concave air groove is smaller than that of the top of the concave air groove; the surface acoustic wave sensor is arranged in the mattress body and comprises a piezoelectric substrate, an input interdigital transducer and an output interdigital transducer, wherein the piezoelectric substrate is arranged on the lower side of the concave air groove, the top surface of the piezoelectric substrate is contacted with the bottom of the concave air groove, and the input interdigital transducer and the output interdigital transducer are respectively and symmetrically distributed at two ends of the piezoelectric substrate and are respectively arranged on the left side and the right side of the concave air groove; the surface acoustic wave sensor is electrically connected with the signal transmission antenna module, and the signal transmission antenna module is used for signal transmission between the surface acoustic wave sensor and the reader.
2. The infant mattress with heart rate breath detection of claim 1, wherein: the signal transmission antenna module comprises a signal receiving antenna and a signal transmitting antenna, the signal receiving antenna and the signal transmitting antenna are respectively connected with the input interdigital transducer and the output interdigital transducer, the signal receiving antenna is used for receiving an excitation signal transmitted by the reader, and the signal transmitting antenna is used for transmitting a signal output by the output interdigital transducer to the reader.
3. The infant mattress with heart rate breath detection of claim 1, wherein: the concave air grooves are of strip structures, the concave air grooves are formed in the width direction of the mattress body, the piezoelectric substrate is arranged in the length direction of the mattress body, and the plurality of surface acoustic wave sensors are sequentially arranged below the concave air grooves in an array mode in the width direction of the mattress body.
4. The infant mattress with heart rate breath detection of claim 1, wherein: the thickness of the vacuum layer is 2-5 cm.
5. The infant mattress with heart rate breath detection of claim 1, wherein: the piezoelectric substrate is a lithium niobate substrate, the thickness of the piezoelectric substrate is 0.1mm, the width of the piezoelectric substrate is 0.5mm, and the length of the piezoelectric substrate is 25 mm; the interdigital of the input interdigital transducer and the interdigital of the output interdigital transducer are both 20 μm.
6. The infant mattress with heart rate breath detection of claim 1, wherein: the surface acoustic wave sensor is a delay line type patch surface acoustic wave sensor.
7. The infant mattress with heart rate breath detection of claim 1, wherein: the vacuum layer is arranged in the mattress body and is arranged in the middle of the mattress body, a base is further arranged in the mattress body, the base is arranged below the vacuum layer, and the surface acoustic wave sensor is fixed on the lower side of the vacuum layer through the base.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920793339.XU CN210493476U (en) | 2019-05-29 | 2019-05-29 | Baby mattress with heart rate respiration detection function |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201920793339.XU CN210493476U (en) | 2019-05-29 | 2019-05-29 | Baby mattress with heart rate respiration detection function |
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| CN210493476U true CN210493476U (en) | 2020-05-12 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110200447A (en) * | 2019-05-29 | 2019-09-06 | 上海工程技术大学 | A kind of crib mattress and its control method with heart rate breathing detection |
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2019
- 2019-05-29 CN CN201920793339.XU patent/CN210493476U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110200447A (en) * | 2019-05-29 | 2019-09-06 | 上海工程技术大学 | A kind of crib mattress and its control method with heart rate breathing detection |
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