CN210447058U

CN210447058U - Digital physiological sound collector

Info

Publication number: CN210447058U
Application number: CN201920886861.2U
Authority: CN
Inventors: 王皓; 罗狄锋; 黄毅新; 杨红光; 曹丽兵; 陈伟
Original assignee: Foshan Hedelong Electronic Co ltd
Current assignee: Guangdong Hanhong Medical Technology Co.,Ltd.
Priority date: 2019-06-13
Filing date: 2019-06-13
Publication date: 2020-05-05
Anticipated expiration: 2029-06-13

Abstract

The utility model relates to a digital physiological sound collector, including shell, vibrating diaphragm and pickup sensor, the shell is equipped with the inner chamber, the lateral wall of inner chamber is equipped with the division board, the division board will first cavity and second cavity are separated into to the inner chamber, the division board is equipped with the intercommunication first cavity with the sound hole of leading of second cavity, the one end of shell be equipped with the opening of first cavity intercommunication. The vibrating diaphragm is hermetically arranged at the opening of the shell; the pickup sensor is installed in the second cavity, and an acoustic cavity is arranged between the pickup sensor and the diaphragm. The pickup sensor is used for converting the vibration signal into a digital signal. When the digital physiological sound collector is used, ultrasonic waves cannot be radiated to tissues of a human body, the damage to a pregnant woman and a fetus cannot be caused, a cold and viscous coupling agent which is uncomfortable does not need to be smeared, and the digital physiological sound collector has the effect of safe use.

Description

Digital physiological sound collector

Technical Field

The utility model relates to a sound detector technical field especially relates to a digital physiological sound collector.

Background

The ultrasonic Doppler fetal rhythm instrument adopts an ultrasonic non-focusing continuous wave Doppler principle, consists of an ultrasonic transducer and a circuit part which are acoustically coupled with the abdomen of a mother body, can monitor and record the heart rate of a fetus and the uterine contraction of the mother body, and is mainly used for monitoring the fetus in the later pregnancy period, before and during the parturient. During detection, an ultrasonic beam generated by an ultrasonic transducer is directly aimed at a fetus, a part of the ultrasonic beam is incident to a moving surface of the fetal heart, the frequency of the ultrasonic beam is shifted due to Doppler effect, the frequency of the ultrasonic beam is detected by a receiving transducer, and a low-frequency signal related to the fetal heart can be separated and amplified for fetal heart detection through signal processing. The ultrasonic Doppler fetal heart monitor is a fetal heart monitoring mode and instrument which are recognized in the industry and have the widest application range.

However, as early as 16.12.2014, the FDA (Food and Drug Administration) indicated that ultrasound slightly heated tissue and, in some cases, created tiny vacuoles (cavities) in tissue. Since the household device cannot control the number of times or the duration of a single time for scanning a fetus, too high frequency of use may increase the damage to the fetus and even a pregnant woman. In addition, when the ultrasonic Doppler fetal rhythm instrument is used, cold and sticky couplant needs to be used, so that discomfort is caused to people. Therefore, the traditional physiological sound (for example, the heartbeat sound of a fetus) acquisition mode adopts an ultrasonic Doppler fetal heart instrument, and the physiological sound acquisition mode has the problem of unsafe use.

SUMMERY OF THE UTILITY MODEL

In view of the above, there is a need to provide a digital physiological sound collector with safe use, which can solve the problem of unsafe use.

A digital physiological sound collector, comprising:

the shell is provided with an inner cavity, the side wall of the inner cavity is provided with a partition plate, the partition plate divides the inner cavity into a first cavity and a second cavity, the partition plate is provided with a sound guide hole communicated with the first cavity and the second cavity, and one end of the shell is provided with an opening communicated with the first cavity;

the vibrating diaphragm is hermetically arranged at the opening of the shell, and can vibrate due to physiological sound when contacting the skin of the detected person; and

the pickup sensor is arranged in the second cavity, an acoustic cavity is arranged between the pickup sensor and the vibrating diaphragm, and the acoustic cavity can form a vibration signal due to vibration of the vibrating diaphragm and transmit the vibration signal to the pickup sensor; the pickup sensor is used for converting the vibration signal into a digital signal.

When the digital physiological sound collector is used for detecting physiological sound (such as fetal heartbeat sound), the vibrating diaphragm is attached to the belly of a pregnant woman, and the fetal heartbeat sound can vibrate due to the vibrating diaphragm. Because the vibrating diaphragm shakes, the vibrating diaphragm can extrude the air in the acoustic cavity, and therefore the acoustic cavity can form a shaking signal due to the shaking of the vibrating diaphragm. The pickup sensor receives the vibration signal and converts the vibration signal into a digital signal, so that the collection of physiological sound is completed. When the digital physiological sound collector is used, ultrasonic waves cannot be radiated to tissues of a human body, the damage to a pregnant woman and a fetus cannot be caused, a cold and viscous coupling agent which is uncomfortable does not need to be smeared, and the digital physiological sound collector has the effect of safe use.

In one embodiment, the pickup sensor is installed on one side of the separation plate close to the second cavity, and a first rubber pad is arranged between the pickup sensor and the separation plate.

In one embodiment, the pickup sensor comprises a mounting cover and a pickup PCBA board, the mounting cover is mounted on the partition plate, a mounting cavity for accommodating the pickup PCBA board is arranged in the mounting cover, and the mounting cavity is communicated with the acoustic cavity.

In one embodiment, the mounting cover comprises an upper cover and a lower cover which are detachably connected, and the upper cover and the lower cover are connected together to form the mounting cavity.

In one embodiment, a second rubber pad is arranged between the wall of the mounting cavity and the pickup PCBA board.

In one embodiment, a bell mouth is arranged on one side of the partition plate close to the first cavity, the mounting cover is provided with a guide tube, and the guide tube is inserted into the sound guide hole and extends to the bottom center of the bell mouth.

In one embodiment, the diameter value of the bell mouth is 10 mm-15 mm, and/or the depth value h of the bell mouth is 1 mm-2 mm.

In one embodiment, the method further comprises at least one of the following steps:

the diameter value of the first cavity is 15-36 mm;

the height value of the first cavity is 1-8 mm; and

the diameter value of the sound guide hole is 1-5 mm.

In one embodiment, the digital physiological sound collector further comprises a fixing ring, the fixing ring is detachably fixed at the opening end of the shell, and the outer edge of the diaphragm is fixedly arranged between the fixing ring and the shell.

In one embodiment, a space is provided between the outer edge of the diaphragm and the fixing ring.

Drawings

Fig. 1 is a top view of a digital physiological sound collector in an embodiment of the present invention;

FIG. 2 is a cross-sectional view taken along line A-A of FIG. 1;

FIG. 3 is a partial enlarged view of FIG. 2 at B;

fig. 4 is a detection schematic diagram of the digital physiological sound collector of the present invention;

FIG. 5 is a graph showing the results of the test for the presence or absence of a flare in FIG. 4;

FIG. 6 is a graph of the test results of FIG. 4 for different first lumen diameter values;

FIG. 7 is a graph of the test results of FIG. 4 for different first chamber height values;

fig. 8 is a graph showing the test results of fig. 4 for different diameters of the sound guide hole.

100. The shell, 101, the first cavity, 102, the second cavity, 103, the third cavity, 104, the inner chamber, 110, the division board, 111, lead the sound hole, 112, the horn mouth, 120, first cushion, 200, the vibrating diaphragm, 300, the pickup sensor, 310, the installation lid, 311, the upper cover, 312, the lower cover, 320, pickup PCBA board, 330, the fastener, 340, the second cushion, 400, solid fixed ring, 410, the interval, 510, main PCBA board, 520, touch PCBA board, 530, the glass pane, 540, the earphone socket, 550, the battery, 560, the upper bracket, 570, the lower bracket, 580, the third cushion.

Detailed Description

In order to facilitate understanding of the present invention, the present invention will be described more fully hereinafter with reference to the accompanying drawings. The preferred embodiments of the present invention are shown in the drawings. The invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.

It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. In contrast, when an element is referred to as being "directly on" another element, there are no intervening elements present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only. In the present invention, the terms "first", "second" and "third" do not denote any particular quantity or order, but are merely used to distinguish names.

Referring to fig. 1 and 2, a digital physiological sound collector includes a housing 100, a diaphragm 200 and a pickup sensor 300. The casing 100 is provided with an inner cavity 104, a partition plate 110 is arranged on the side wall of the inner cavity 104, the partition plate 110 divides the inner cavity 104 into a first cavity 101 and a second cavity 102, the partition plate 110 is provided with a sound guide hole 111 communicating the first cavity 101 and the second cavity 102, and one end of the casing 100 is provided with an opening communicating with the first cavity 101. The diaphragm 200 is hermetically installed at the opening of the housing 100, and the diaphragm 200 can vibrate due to physiological sound when contacting the skin of the subject.

It should be noted that the term "contact" herein includes direct contact of the diaphragm 200 directly attached to the skin of the human body, and also includes indirect contact of the diaphragm 200 attached to the clothing of the human body.

The sound pickup sensor 300, also called a pickup head, is an electro-acoustic instrument that receives sound vibration, and reduces and amplifies the sound. The pickup sensor 300 is installed in the second cavity 102, and an acoustic cavity is formed between the pickup sensor 300 and the diaphragm 200, and the acoustic cavity can generate a vibration signal due to vibration of the diaphragm 200 and transmit the vibration signal to the pickup sensor 300. The pickup sensor 300 is used to convert the vibration signal into a digital signal.

When the digital physiological sound collector is used for detecting physiological sound (for example, heartbeat sound of a fetus), the diaphragm 200 is attached to the belly of a pregnant woman, and the heartbeat sound of the fetus can be vibrated by the diaphragm 200. As the diaphragm 200 vibrates, the diaphragm 200 may press air inside the acoustic cavity, and thus, the acoustic cavity may form a vibration signal due to the vibration of the diaphragm 200. The pickup sensor 300 receives the vibration signal and converts the vibration signal into a digital signal, thereby completing the collection of the physiological sound. When the digital physiological sound collector is used, ultrasonic waves cannot be radiated to tissues of a human body, the damage to a pregnant woman and a fetus cannot be caused, a cold and viscous coupling agent which is uncomfortable does not need to be smeared, and the digital physiological sound collector has the effect of safe use.

In addition, at the in-process that physiological sound formed vibration signal transmission to pickup sensor 300 behind vibrating diaphragm 200 and the acoustics cavity, vibrating diaphragm 200 and acoustics cavity have played filterable effect to physiological sound, can get rid of ambient noise's interference, can concentrate and enlarge physiological sound, improve the precision that physiological sound gathered.

Specifically, referring to fig. 2 and 3, the pickup sensor 300 is mounted on a side of the partition plate 110 close to the second cavity 102, and a first rubber pad 120 is disposed between the pickup sensor 300 and the partition plate 110. Note that since the acoustic cavity is separable from the pickup sensor 300, airtightness between the acoustic cavity and the pickup sensor 300 is particularly important, and has a large influence on the frequency response. Therefore, to ensure the best effect, the first rubber pad 120 is disposed at the mounting interface of the acoustic cavity and the pickup sensor 300, and plays a role in mounting and fixing.

In addition, this first cushion 120 plays the cushioning effect between pickup sensor 300 and shell 100, can completely cut off external invalid sound, avoids invalid sound to get into pickup sensor 300 to improve the precision that physiological sound gathered.

Further, referring to fig. 2 and 3, pickup sensor 300 includes a mounting cover 310 and a pickup PCBA board 320. A PCBA Board (Printed Circuit Board Assembly) refers to a Printed Circuit Board Assembly. Wherein, be provided with sound sensor on the pickup PCBA board 320, sound sensor can select for quartz sensor, can detect vibrations, gathers physiological sound. The installation lid 310 is installed in the division board 110, is equipped with the installation cavity that is used for holding pickup PCBA board 320 in the installation lid 310, and installation cavity and acoustic cavity intercommunication. Leading sound hole 111 can concentrate and amplify the vibration signal that the transmission formed to the pickup PCBA board 320 that is located the installation intracavity with the acoustic cavity because air vibrations to improve the precision of gathering the physiology sound. Because the physiological sound is amplified through the acoustic cavity and the sound guide hole 111, the pickup sensor 300 forms a sound spectrum curve according to the digital signal obtained by the vibration signal, and can conveniently distinguish the environmental noise from the amplified physiological sound in the sound spectrum curve, thereby facilitating subsequent filtering and improving the detection accuracy.

Moreover, the pickup PCBA board 320 is positioned in the mounting cover 310, and the mounting cover 310 can isolate environmental noise introduced by other parts of the inner cavity 104, so that the accuracy of physiological sound collection is improved.

Wherein, the mounting cover 310, the first rubber mat 120 and the partition plate 110 are all provided with a connecting hole, and the fastening piece 330 is arranged on the connecting hole in a penetrating manner, so that the connecting and mounting of the mounting cover 310 and the first rubber mat 120 are realized.

Further, with reference to fig. 3, a second rubber pad 340 is disposed between the wall of the mounting cavity and the PCBA board 320. This second cushion 340 plays the cushioning effect between the chamber wall of installation cavity and pickup PCBA board 320, can completely cut off the invalid sound that comes from installation lid 310 to improve the precision that physiological sound gathered.

Specifically, with reference to fig. 2 and 3, the mounting cover 310 includes an upper cover 311 and a lower cover 312 that are detachably connected, and the upper cover 311 and the lower cover 312 are folded and connected to form a mounting cavity. The upper cover 311 and the lower cover 312 are detachably connected, which facilitates installation and maintenance of the pickup PCBA board 320.

Specifically, referring to fig. 2 and 3, a bell mouth 112 is provided on a side of the partition plate 110 close to the first cavity 101. In particular, when the frequency of the physiological sound to be collected is lower than 100Hz, the side of the partition plate 110 close to the first cavity 101 is provided with a bell mouth 112. The mounting cover 310 is provided with a guide sleeve inserted in the sound guide hole 111 and extending to the bottom center of the bell mouth 112. Because one end of the sound guiding hole 111 is located at the center of the bottom of the bell mouth 112, the combination of the first cavity 101, the bell mouth 112 and the sound guiding hole 111 can realize sound gathering and amplification of auscultation sound signals, so as to achieve the optimal auscultation effect, thereby being beneficial to collecting more subtle physiological sounds in vivo, facilitating subsequent noise reduction treatment and improving the detection accuracy. Wherein, the end of the guide cylinder extends to the bottom center of the bell mouth 112, and does not go deep into the bell mouth 112.

Referring to fig. 4, an audio frequency analyzer is used to output 20Hz to 1KHz (blood pressure pulse wave, heart sound wave and lung sound wave are all contained in the frequency range of 20Hz to 1 KHz), the audio frequency signal is coupled to the digital physiological sound collector provided by the application through a sounding horn in the test fixture, and finally received by a pickup sensor 300 of the digital physiological sound collector and converted into an audio frequency electrical signal, which is output to an input end of the audio frequency analyzer, and the audio frequency analyzer obtains an audio frequency spectrum response curve through calculation. Whether the arrangement of the bell mouth 112, the diameter value M of the first cavity 101, the height value L of the first cavity 101 and the diameter value P of the sound guide hole 111 is reasonable or not can be accurately verified by using the audio analyzer.

The heart sound frequency is 60-100 Hz, and belongs to low frequency.

Referring to fig. 5, according to the test of the audio analyzer, it is shown that, under the condition that other conditions are kept unchanged (for example, the diameter value M of the first cavity 101, the height value L of the first cavity 101, and the diameter value P of the sound guide hole 111 are unchanged), the presence of the bell mouth 112 and the absence of the bell mouth 112 at the front end of the sound guide hole 111 only have a significant effect on low frequencies (<100 Hz). Therefore, different physiological sounds are collected as required, and the frequency of the physiological sounds is analyzed to determine whether to provide the bell 112.

Optionally, the diameter value R of the flare 112 is 10mm to 15mm, and the depth value h of the flare 112 is 1mm to 2 mm. The diameter value of the bell mouth 112 refers to the maximum distance between two ends of the bell mouth 112, and does not refer to the diameter of the circle corresponding to the bell mouth 112.

In particular, the diameter value R of the flare 112 is 12mm and the depth value h of the flare 112 is 1.5 mm.

Further, referring to fig. 6, the diameter value M of the first cavity 101 is 15mm to 36 mm. Under the premise that other conditions are unchanged, different diameters of the first cavity 101 have influence on the attenuation of 20 Hz-1 KHz full-band signals, and the attenuation amplitude changes along with the frequency change when the divergence between low frequency (<100Hz) and high frequency (>700Hz) is large. The diameter of the first cavity 101 is selected according to actual needs. Generally, the lung sound is heard with a small diameter, and the heart sound is heard with a large diameter, so that the heart sound signal with the frequency of less than 100Hz is attenuated, and the resolution of the lung sound signal is improved.

Further, referring to fig. 7, the height L of the first cavity 101 is 1mm to 8 mm. Under the premise that other conditions are not changed, different height values of the first cavity 101 all affect the attenuation of 20 Hz-1 KHz full-band signals, but the attenuation amplitude does not change obviously along with the change of frequency. The height of the cavity is selected according to actual needs.

Further, referring to fig. 8, the diameter R of the sound guide hole 111 is 1mm to 5 mm. Under the premise that other conditions are kept unchanged, different sizes of the sound guide holes 111 bring different attenuation effects to low-frequency signals (<300 Hz). The aperture needs to be selected according to actual needs.

On the basis of the foregoing embodiment, in conjunction with fig. 2, the digital physiological sound collector further comprises a fixing ring 400. The fixing ring 400 is detachably fixed to the open end of the housing 100. The outer edge of the diaphragm 200 is fixedly disposed between the fixing ring 400 and the housing 100. The fixing ring 400 is provided to facilitate the installation of the diaphragm 200 and ensure the sealing property of the installation. Wherein, the thickness N of the diaphragm 200 is between 1mm and 3 mm.

Specifically, referring to fig. 2, a space 410 is provided between the outer edge of the diaphragm 200 and the fixing ring 400. This interval 410 can effectively keep apart or eliminate ambient noise, is favorable to vibrating diaphragm 200 vibrations, is favorable to vibrating diaphragm 200 to gather more subtle internal sound to improve the precision that detects.

Specifically, in conjunction with fig. 2, the inner cavity 104 further comprises a third cavity 103. The third cavity 103 is located on a side of the second cavity 102 away from the first cavity 101. Install main PCBA board 510 and touch PCBA board 520 in the third cavity 103, main PCBA board 510 respectively with pickup sensor 300 and touch PCBA board 520 electric connection. The main PCBA board 510 processes the digital signal of the physiological sound collected by the sound pickup sensor 300. The glass panel 530 is arranged on the outer side of the touch PCBA board 520, and the touch function and the indicator light function are achieved. The touch PCBA board 520 may be used to receive control instructions. The main PCBA board 510 can also process the digital signal of the physiological sound according to the control instruction received by the touch PCBA board 520, and display the detected indicator light of the physiological sound control glass panel 530 to remind medical staff.

In addition, with continued reference to FIG. 2, an upper bracket 560 and a lower bracket 570 are also mounted within the third housing 103. Specifically, the upper bracket 560 and the lower bracket 570 are detachably coupled. The upper bracket 560 and the lower bracket 570 come together to form a cavity for mounting the main PCBA board 510 and the touch PCBA board 520. The cavity protects the main PCBA board 510 and the touch PCBA board 520. Main PCBA board 510 and touch PCBA board 520 are located in this cavity, also avoid it to influence pickup sensor 300's normal work, guarantee the degree of accuracy that detects.

Wherein, the casing 100 is further provided with an earphone socket 540, which facilitates the insertion of the digital physiological sound collector into an earphone, and facilitates the auscultation of medical staff. A third rubber pad 580 is disposed at a port of the earphone jack 540, and the third rubber pad 580 can protect the earphone jack 540.

With reference to fig. 2, a battery 550 is also mounted within the third housing 103, the battery 550 being electrically connected to the main PCBA board 510, the battery 550 being configured to provide electrical power to the main PCBA board 510.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only represent some embodiments of the present invention, and the description thereof is specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.

Claims

1. A digital physiological sound collector is characterized in that the digital physiological sound collector comprises:

2. The digital physiological sound collector according to claim 1, wherein the pickup sensor is installed at one side of the separation plate close to the second cavity, and a first rubber cushion is arranged between the pickup sensor and the separation plate.

3. The digital physiological sound collector of claim 2, wherein the pickup sensor comprises a mounting cover and a pickup PCBA board, the mounting cover is mounted on the partition plate, a mounting cavity for accommodating the pickup PCBA board is arranged in the mounting cover, and the mounting cavity is communicated with the acoustic cavity.

4. The digital physiological sound collector according to claim 3, wherein the mounting cover comprises an upper cover and a lower cover which are detachably connected, and the upper cover and the lower cover are connected together to form the mounting cavity.

5. The digital physiological sound collector according to claim 3, wherein a second rubber pad is arranged between the wall of the mounting cavity and the pickup PCBA board.

6. The digital physiological sound collector according to claim 3, wherein a bell mouth is arranged on one side of the partition plate close to the first cavity, the mounting cover is provided with a guide tube, and the guide tube is inserted into the sound guide hole and extends to the center of the bottom of the bell mouth.

7. The digital physiological sound collector according to claim 6, wherein the diameter value of the bell mouth is 10 mm-15 mm, and/or the depth value h of the bell mouth is 1 mm-2 mm.

8. The digital physiological sound collector of claim 1, further comprising at least one of:

the diameter value of the first cavity is 15-36 mm;

the height value of the first cavity is 1-8 mm; and

the diameter value of the sound guide hole is 1-5 mm.

9. The digital physiological sound collector according to any one of claims 1 to 8, further comprising a fixing ring detachably fixed to the open end of the housing, wherein the outer edge of the diaphragm is fixedly disposed between the fixing ring and the housing.

10. The digital physiological sound collector of claim 9, wherein a space is provided between the outer edge of the diaphragm and the fixing ring.