CN204318788U - Multifunctional intelligent stethoscope - Google Patents

Abstract

The utility model relates to a multifunctional intelligent stethoscope, which comprises a left sound guide tube, a right sound guide tube and a sound pickup tube respectively provided with a left earplug, a right earplug and a pickup head, and the left sound guide tube, the right sound guide tube and the The pickup tubes are connected to each other through a three-way tube; the stethoscope is provided with a heart rate detection device at the three-way tube; the heart rate detection device includes a housing and a circuit board located in the housing, a heart sound collection device and a heart rate output device , the pickup end of the heart sound collection device is connected to the pickup tube, and its output end is connected to the circuit board, and the heart rate output device is connected to the circuit board. On the basis of not affecting the functions and usage habits of traditional stethoscopes, the automatic heart rate detection and broadcasting function is added. Doctors and nurses can concentrate on auscultation. The heart rate detection accuracy is high, and it is flexible to use, easy to carry, simple and reasonable in structure.

Description

A kind of multifunctional intelligent stethoscope

technical field

The utility model relates to the technical field of stethoscopes, in particular to a multifunctional intelligent stethoscope.

Background technique

The air conduction stethoscope is an essential diagnosis and treatment tool for every doctor and nurse. Using a stethoscope to measure a patient's heart rate is a daily routine for every physician and nurse. During the measurement process, the doctors and nurses obtain the heart rate of the testee per minute by listening to the heart sounds of the testee and counting the number of heartbeats while looking at the watch; this method of heart rate measurement is not accurate and requires doctors and nurses to concentrate Counting heartbeats and timing, it is impossible to focus on listening to heart sounds to diagnose the heart function of the subject under test, which seriously affects the efficiency of doctors' examinations. At present, electronic stethoscopes also appear on the market, which use a microphone to pick up heart sound signals, and calculate the heart rate value by analyzing the heart sound signals; but these electronic (smart) stethoscopes are actually an electronic device independent of traditional stethoscopes, and require a separate display device to display The measured heart rate value is provided to doctors and nurses. Doctors and nurses cannot use traditional stethoscopes together, and it is very inconvenient to use and carry.

Utility model content

In order to solve the above problems in the prior art, the utility model provides a stethoscope with automatic heart rate detection and broadcast function without affecting the function and usage habits of the traditional stethoscope, so that doctors and nurses can concentrate on auscultation to improve heart rate detection. The accuracy of the test is guaranteed, and it is flexible to use, easy to carry, simple in structure and reasonable in multifunctional intelligent stethoscope.

The utility model is achieved through the following technical solutions:

A multifunctional intelligent stethoscope comprises a left sound guide tube, a right sound guide tube and a sound pickup tube respectively provided with a left earplug, a right earplug and a pickup head, and the left sound guide tube, the right sound guide tube and the sound pickup tube pass through The three-way pipes are connected together; the stethoscope is provided with a heart rate detection device at the three-way pipes.

Further, the heart rate detection device includes a housing and a circuit board arranged in the housing, a heart sound collection device and a heart rate output device, the pickup end of the heart sound collection device is connected to the pickup tube, and its output end It is connected with the circuit board, and the heart rate output device is connected with the circuit board.

Further, the heart rate output device includes at least one of a voice announcement device, a wireless transceiver device, and a liquid crystal display device.

Further, the heart rate output device is a voice broadcast device, and the housing includes a front shell and a rear shell that are mutually symmetrical and matched, and the surfaces of the mutually jointed sides are respectively provided with an upper cavity and a lower cavity that are independent of each other, The circuit board is installed in the cavity formed by the upper cavity of the front shell and the rear shell; the tee pipe, heart sound collection device and voice broadcast device of the stethoscope are installed in the cavity formed by the lower cavity of the front shell and the rear shell, And it is conductively connected with the circuit board in the upper cavity.

Further, the shape of the lower cavity of the front shell and the rear shell is adapted to the tee pipe of the stethoscope, and the inner side walls of the lower cavity of the front shell and the lower cavity of the rear shell are respectively provided with a first installation concave position and the second installation recess, the heart sound collection device and the voice broadcast device are respectively installed in the first installation recess and the second installation recess.

Further, the circuit board is integrated with a front-end preprocessing device and a digital signal processing chip; the front-end preprocessing device is mainly composed of a band-pass filter circuit, a full-wave rectification circuit and a low-pass filter circuit, and the input of the full-wave rectification circuit end and the output end are respectively connected with the output end of the band-pass filter circuit and the input end of the low-pass filter circuit, and the output end of the low-pass filter circuit is connected on the digital signal processing chip; The pickup tube is connected, and its output end is connected with the input end of the band-pass filter circuit; the heart rate output device is connected with the digital signal processing chip.

Further, the band-pass filter circuit is composed of a second-order high-pass and a second-order low-pass using a sallen-key structure; the low-pass filter circuit (443) is a 10Hz low-pass filter circuit.

Further, the digital signal processing chip is a STC15F204EA series single-chip microcomputer, including a multi-channel selection switch, a comparator, a successive comparison register, a digital-to-analog conversion chip, a conversion result register and an AD conversion control register.

Further, the voice announcement device includes a voice chip and a speaker, and the input end and output end of the voice chip are respectively connected to the digital signal processing chip and the speaker.

Further, the heart rate output device also includes a wireless transceiver device, the wireless transceiver device is a wireless Bluetooth transceiver device, set on the circuit board, and connected to the digital signal processing chip.

Compared with the prior art, the utility model has the following advantages:

Through the above technical scheme, the utility model not only has the function of a traditional stethoscope, but also has the function of heart rate detection and broadcasting. During the measurement process, doctors and nurses do not need to perform additional operations (that is, without counting heartbeats and watching watches) to obtain the heart rate of the person under test. , you can concentrate on auscultation, which not only greatly reduces the labor of doctors and nurses, but also improves the accuracy of heart rate detection, the inspection results are guaranteed, and it is flexible to use, easy to carry, simple and reasonable in structure.

Description of drawings

Fig. 1 is the structural representation of the embodiment of multifunctional intelligent stethoscope described in the utility model;

Fig. 2 is the structural representation of front shell in the embodiment of multifunctional intelligent stethoscope described in the utility model;

Fig. 3 is the structural representation of the rear case in the embodiment of the multifunctional intelligent stethoscope described in the utility model;

Fig. 4 is a schematic block diagram of the structural principle of the heart rate detection device of the multifunctional intelligent stethoscope embodiment of the present invention;

Fig. 5 is a schematic block diagram of the structure and principle of the front-end preprocessing device in the multifunctional intelligent stethoscope embodiment of the utility model;

Fig. 6 is the circuit structure diagram of the band-pass filter circuit in the embodiment of the multifunctional intelligent stethoscope described in the utility model;

Fig. 7 is the circuit structural diagram of the full-wave rectification circuit in the embodiment of multifunctional intelligent stethoscope described in the utility model;

Fig. 8 is a circuit structure diagram of the low-pass filter circuit in the embodiment of the multifunctional intelligent stethoscope of the present invention.

Detailed ways

In order to make the purpose, technical solution and advantages of the utility model clearer, the utility model will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model, and are not intended to limit the utility model.

As shown in Figure 1 to Figure 8:

The embodiment of the utility model provides a multifunctional intelligent stethoscope, comprising a left sound guide tube 1, a right sound guide tube 2 and a sound pickup tube 3 respectively provided with a left earplug, a right earplug and a pickup head, and the left sound guide tube 1 , the right sound guiding tube 2 and the sound pickup tube 3 are connected to each other as a whole through a three-way tube. The stethoscope is provided with a heart rate detection device 4 at the three-way pipe, and the heart rate detection device 4 includes a housing 41 and a circuit board 42, a heart sound acquisition device 43 and a heart rate output device arranged in the housing 41. The circuit The board 42 is integrated with a front-end preprocessing device 44 and a digital signal processing chip 45 , and the heart rate output device is a voice broadcast device 46 . Wherein, the housing 41 includes a front shell 411 and a rear shell 412 that are mutually symmetrical and matingly engaged, and an upper cavity 413 and a lower cavity 414 that are independent of each other are respectively provided on the surfaces of the mutually joint sides, and the circuit board 42 is installed In the cavity formed by the upper cavity 413 of the front shell 411 and the rear shell 412; cavity, and is connected to the circuit board 42 in the upper cavity 413; the shape of the lower cavity 414 of the front shell 411 and the rear shell 412 is adapted to the tee tube of the stethoscope, and the lower cavity of the front shell 411 414 and the inner side wall of the lower cavity 414 of the rear shell 412 are respectively provided with a first installation recess 415 and a second installation recess 416, and the heart sound collection device 43 and the voice broadcast device 46 are respectively installed in the first installation recess 415 and the second installation recess 416.

The front-end preprocessing device 44 is mainly composed of a band-pass filter circuit 441, a full-wave rectifier circuit 442 and a low-pass filter circuit 443, and the input and output ends of the full-wave rectifier circuit 442 are respectively connected to the output end of the band-pass filter circuit 441. It is connected with the input end of the low-pass filter circuit 443, and the output end of the low-pass filter circuit 443 is connected on the digital signal processing chip 45; and a second-order low-pass; the low-pass filter circuit 443 is a 10Hz low-pass filter circuit. Described heart sound acquisition device 43 is a pickup, and its pickup end is connected with pickup tube 3, and output end is connected with the input end of band-pass filter circuit 441; Described digital signal processing chip 45 is STC15F204EA series single-chip microcomputer, comprises multiplex selection Switch, comparator, successive comparison register, (10) digital-to-analog conversion chip, conversion result register and AD conversion control register (ADC_CONTR); Described voice broadcast device 46 comprises voice chip 461 and loudspeaker 462, and the voice chip 461 The input end and the output end are respectively connected with the digital signal processing chip 45 and the speaker 462 , that is, the voice announcement device 46 is connected with the digital signal processing chip 45 .

When the multifunctional intelligent stethoscope described in the utility model was working, at first the heart sound acquisition device 43 collected the heart sound signal transmitted in the sound pickup tube 3, and sent it to the front-end preprocessing device 44 for preprocessing (i.e. filtering through the bandpass filter circuit 441 first) , amplified to obtain a relatively clean heart sound signal with a relatively obvious amplitude, and then the full-wave rectification circuit 442 performs full-wave rectification on the heart sound signal to obtain a unilateral signal, and finally the low-pass filter circuit 443 performs low-pass filtering on the unilateral signal, Obtain the envelope of the heart sound signal.), then the digital signal processing chip 45 calculates the heart rate value according to the envelope of the heart sound signal, and finally sends it to the voice broadcast device 46 for voice broadcast.

In this way, the stethoscope described in the utility model not only has the function of a traditional stethoscope, but also has the function of heart rate detection and broadcasting. During the measurement process, doctors and nurses do not need to perform additional operations (that is, without counting heartbeats and looking at the watch) to obtain the heart rate of the subject. , you can concentrate on auscultation, which not only greatly reduces the labor of doctors and nurses, but also improves the accuracy of heart rate detection, the inspection results are guaranteed, and it is flexible to use, easy to carry, simple and reasonable in structure.

As a preferred solution of the present invention, the heart rate output device may also include a wireless transceiver, which may be a wireless Bluetooth transceiver 47 , which is arranged on the circuit board 42 and connected to the digital signal processing chip 45 . In this way, the stethoscope is connected to an external Bluetooth device (such as a mobile phone with Bluetooth function) through the wireless Bluetooth transceiver device 7, and the measurement results are transmitted to the external Bluetooth device for display and storage through the wireless Bluetooth transceiver device 7.

Of course, the heart rate output device may also include at least one of a voice announcement device 46, a wireless transceiver device, and a liquid crystal display device.

The above is a preferred embodiment of the present utility model, it should be pointed out that for those of ordinary skill in the art, without departing from the principle of the present utility model, some improvements and modifications can also be made, these improvements and modifications It is also regarded as the protection scope of the present utility model.

Claims (10)

1. a multifunctional intellectual stethoscope, it is characterized in that: described stethoscope comprises and is respectively equipped with the left sound guide tube (1) of left earplug, right earplug and pick-up head, right sound guide tube (2) and pickup cartridge (3), and left sound guide tube (1), right sound guide tube (2) and pickup cartridge (3) are interconnected one by tee T; Described stethoscope is positioned at tee T place and is provided with heartbeat detection device (4).

2. multifunctional intellectual stethoscope according to claim 1, it is characterized in that: described heartbeat detection device (4) includes housing (41) and is located at circuit board (42), heart sound acquisition device (43) and the heart rate output device in housing (41), the pickup end of described heart sound acquisition device (43) is connected with described pickup cartridge (3), and its outfan is connected with described circuit board (42), described heart rate output device is connected with described circuit board (42).

3. multifunctional intellectual stethoscope according to claim 2, is characterized in that: described heart rate output device at least comprises the one in sound broadcasting device (46), wireless transmitter, liquid crystal indicator.

4. multifunctional intellectual stethoscope according to claim 2, it is characterized in that: described heart rate output device is sound broadcasting device (46), described housing (41) includes symmetrically and the fore shell (411) of coupling joint and back cover (412), its side surface that is bonded with each other is respectively equipped with separate upper plenum (413) and lower cavity (414), in the cavity that the upper plenum (413) that described circuit board (42) is arranged on fore shell (411) and back cover (412) is formed; In the cavity that the lower cavity (414) that described stethoscopic tee T, heart sound acquisition device (43) and sound broadcasting device (46) are arranged on fore shell (411) and back cover (412) is formed, and be connected with circuit board (42) conducting in upper plenum (413).

5. multifunctional intellectual stethoscope according to claim 4, it is characterized in that: lower cavity (414) shape of described fore shell (411) and back cover (412) and stethoscopic tee T suitable, and the inside side walls of the lower cavity (414) of the lower cavity (414) of fore shell (411) and back cover (412) is respectively equipped with the first installation recess (415) and the second installation recess (416), described heart sound acquisition device (43) and sound broadcasting device (46) are arranged on the first installation recess (415) and second respectively and install in recess (416).

6. the multifunctional intellectual stethoscope according to Claims 2 or 3 or 4 or 5, is characterized in that: described circuit board (42) is integrated with front end pretreatment unit (44) and digital signal processing chip (45); Described front end pretreatment unit (44) forms primarily of bandwidth-limited circuit (441), full-wave rectifying circuit (442) and low-pass filter circuit (443), and the input of full-wave rectifying circuit (442) and outfan are connected with the outfan of bandwidth-limited circuit (441) and the input of low-pass filter circuit (443) respectively, the outfan of described low-pass filter circuit (443) is connected on digital signal processing chip (45); The pickup end of described heart sound acquisition device (43) is connected with pickup cartridge (3), and its outfan is connected with the input of bandwidth-limited circuit (441); Described heart rate output device is connected with digital signal processing chip (45).

7. multifunctional intellectual stethoscope according to claim 6, is characterized in that: described bandwidth-limited circuit (441) is made up of jointly the second order high pass and a step low-pass adopting sallen-key structure; Described low-pass filter circuit (443) is 10Hz low-pass filter circuit.

8. multifunctional intellectual stethoscope according to claim 7, it is characterized in that: described digital signal processing chip (45) is STC15F204EA series monolithic, include multidiameter option switch, comparator, successively comparand register, analog-digital chip, transformation result depositor and AD conversion and control depositor.

9. the multifunctional intellectual stethoscope according to claim 3 or 4 or 5 or 7 or 8, it is characterized in that: described sound broadcasting device (46) comprises speech chip (461) and loudspeaker (462), the input of described speech chip (461) is connected with digital signal processing chip (45) and loudspeaker (462) respectively with outfan.

10. multifunctional intellectual stethoscope according to claim 4, it is characterized in that: described rate output device also includes wireless transmitter, described wireless transmitter is wireless blue tooth R-T unit (47), be arranged on circuit board (42), and be connected with digital signal processing chip (45).