CN213217196U

CN213217196U - Integrated Doppler fetal rhythm instrument

Info

Publication number: CN213217196U
Application number: CN202021720172.3U
Authority: CN
Inventors: 陈沾常
Original assignee: Individual
Current assignee: Individual
Priority date: 2020-08-18
Filing date: 2020-08-18
Publication date: 2021-05-18
Anticipated expiration: 2030-08-18

Abstract

The utility model provides an integrated Doppler fetal rhythm instrument, which comprises a shell, an ultrasonic sensor, a board card, a loudspeaker and a display screen; the ultrasonic sensor, the board card, the loudspeaker and the display screen are arranged in the shell, a cavity is formed in the shell, and the ultrasonic sensor, the loudspeaker and the display screen are electrically connected with the board card and are arranged in the shell; the front surface of the ultrasonic sensor wafer faces the outside of the mounting cavity, the back surface of the ultrasonic sensor wafer faces the inside of the mounting cavity, no partition plate or baffle plate is arranged between the back surface of the ultrasonic sensor wafer and the board card, the back surface of the ultrasonic sensor wafer and the board card are mutually communicated in space, and the display screen is arranged on the front surface of the shell. The utility model has the advantages that: the traditional partition plate structure is cancelled, so that the influence on normal signal acquisition is avoided, and the signal-to-noise ratio of the product can be improved; the layout of the loudspeaker is optimized, and the defect of poor sound transmission path in the prior art is overcome.

Description

Integrated Doppler fetal rhythm instrument

Technical Field

The utility model relates to a fetus-voice meter especially relates to an integration Doppler fetus-voice meter.

Background

In the conventional integrated fetal heart monitor, as shown in fig. 1, a partition plate 103 is arranged between an acoustic head 101 of an ultrasonic sensor and a board card to separate a housing into a first chamber 102 and a second chamber 104, but the partition plate 103 may cause ultrasonic signals to be reflected in a reverse direction of an ultrasonic wafer, which affects normal signal acquisition, and meanwhile, when a body is subjected to vibration of a speaker, the partition plate 103 may be caused to vibrate, which causes a frequency deviation of ultrasonic echoes reflected by the ultrasonic signals due to a doppler principle, so that useless signals are received, demodulated, amplified and processed by the fetal heart monitor, which causes self-excited scream; moreover, the conventional speakers are usually arranged on the back of the product (the display surface of the display screen 105 is taken as the front surface), and the sound propagation direction of the speakers on the back is opposite to that of human ears, so that the sound propagation path is not good, the volume needs to be increased, and the problem of self-excited howling may be caused by the increased volume.

Disclosure of Invention

In order to solve the problems in the prior art, the utility model provides an integrated Doppler fetal rhythm instrument.

The utility model provides an integrated Doppler fetal rhythm instrument, which comprises a shell, an ultrasonic sensor, a board card, a loudspeaker and a display screen; the ultrasonic sensor, the board card, the loudspeaker and the display screen are arranged in the shell, an installation cavity is formed in the shell, and the ultrasonic sensor, the loudspeaker and the display screen are electrically connected with the board card and are arranged in the installation cavity of the shell; the front surface of the ultrasonic sensor wafer faces the outside of the mounting cavity, the back surface of the ultrasonic sensor wafer faces the inside of the mounting cavity, a partition plate or a baffle plate is not arranged between the back surface of the ultrasonic sensor wafer and the board card, the back surface of the ultrasonic sensor wafer and the board card are mutually communicated in space, and the display screen is arranged on the front surface of the shell;

as a further improvement of the utility model, the ultrasonic sensor wafer can be one or more wafers, and the working mode of the integrated Doppler fetal rhythm instrument can be a pulse wave working mode or a continuous wave working mode; the ultrasonic sensor wafer is mounted at the bottom end of the shell;

as a further improvement of the present invention, the speaker is installed on the top of the casing or both sides of the display screen or the front side.

The utility model has the advantages that: by the scheme, the traditional partition plate structure is cancelled, so that the influence on normal signal acquisition is avoided, and the signal-to-noise ratio of the product is improved; the layout of the loudspeaker is optimized, and the defect of poor sound transmission path in the prior art is overcome.

Drawings

Figure 1 is a schematic view of a prior art integrated fetal heart monitor.

Fig. 2 is a schematic view of an integrated doppler fetal rhythm instrument.

Fig. 3 is a schematic layout diagram of the speaker of the integrated doppler fetal rhythm instrument at the top end of the present invention.

Fig. 4 is a schematic layout diagram of the speakers of the integrated doppler fetal rhythm instrument of the present invention on both sides.

Fig. 5 is a schematic layout view of the speaker of the integrated doppler fetal rhythm instrument in front of the present invention.

Detailed Description

The present invention will be further described with reference to the following description and embodiments.

As shown in fig. 2-5, an integration doppler fetal rhythm appearance, including casing 1, ultrasonic sensor sound head 2 and integrated circuit board, be equipped with installation cavity 4 in the casing 1, ultrasonic sensor sound head 2 with the integrated circuit board is connected, ultrasonic sensor sound head 2 and host computer are located jointly within the installation cavity 4, do not set up the baffle between ultrasonic sensor sound head 2 and the integrated circuit board, communicate each other, the integrated circuit board is connected with display screen 3 and speaker 5, display screen 3 installs casing 1's front, the back at display screen 3 is installed to the integrated circuit board.

As shown in fig. 3, in order to improve the sound propagation path, a speaker 5 is installed at the top end of the housing 1 with the sound outlet facing upward or forward.

As shown in fig. 4, in order to improve the sound propagation path, the speakers 5 are installed at both sides of the housing 1, that is, the speakers 5 are designed at both sides of the screen, and either a single speaker or a dual speaker design may be used.

As shown in fig. 5, in order to improve the sound propagation path, a speaker 5 is installed on the front surface of the housing 1, and the speaker 5 is designed below the screen.

As shown in fig. 2 to 5, the ultrasonic sensor head 2 includes an ultrasonic sensor wafer mounted on the bottom end of the housing 1.

As shown in fig. 2 to 5, the front surface of the ultrasonic sensor wafer faces the outside of the mounting cavity 4, the back surface of the ultrasonic sensor wafer faces the inside of the mounting cavity 4, and no partition or baffle is arranged between the back surface of the ultrasonic transducer wafer and the host.

The utility model provides an integrated Doppler fetal rhythm instrument, which cancels a cavity partition plate between an ultrasonic sensor wafer and a board card, and does not design a partition plate between the ultrasonic sensor wafer and the board card, thereby facilitating the passing of cables; when the ultrasonic sensor wafer is excited by voltage, a piezoelectric effect occurs, electric energy is converted into mechanical energy, the wafer vibrates, the vibration can be transmitted through the front surface and the back surface of the wafer, when ultrasonic waves on the back surface of the ultrasonic sensor wafer are transmitted, if a partition board is encountered, a reflection phenomenon can also occur, reflected ultrasonic signals can be received by the ultrasonic sensor wafer, when a body is vibrated by a loudspeaker, the partition board also vibrates, reflected ultrasonic echoes of the ultrasonic signals generate frequency offset due to the Doppler principle, and therefore useless signals can be received by a fetal heart instrument, demodulated and amplified, and self-excited whistling is caused; on the other hand, the ultrasonic sensor wafer receives an ultrasonic reflection signal on the back surface of the ultrasonic sensor wafer due to the reflection of the partition board, and the signal is an useless signal and can reduce the overall signal-to-noise ratio of the product; therefore, the utility model discloses with the baffle cancellation, with the ultrasonic echo elimination at this wafer back, avoid taking place the self excitation and whistle, also promoted the SNR of product simultaneously.

The utility model provides a pair of integration Doppler fetal rhythm appearance has following advantage:

1. the clapboard is cancelled, so that the generation of self-excited squeal can be effectively inhibited, and the signal-to-noise ratio of the product is improved.

2. By adopting the new loudspeaker structure, the problem that the sound production path of the loudspeaker arranged on the back of the display screen is not good can be solved.

The utility model provides a pair of integration Doppler fetal heart instrument has promoted fetal heart instrument's performance, has reduced the possibility of self-excited screaming, and mainly used medical field acquires fetus heart sound and rhythm of the heart for detect fetus health condition.

The foregoing is a more detailed description of the present invention, taken in conjunction with the specific preferred embodiments thereof, and it is not intended that the invention be limited to the specific embodiments shown and described. To the utility model belongs to the technical field of ordinary technical personnel, do not deviate from the utility model discloses under the prerequisite of design, can also make a plurality of simple deductions or replacement, all should regard as belonging to the utility model discloses a protection scope.

Claims

1. An integrated Doppler fetal rhythm instrument, which is characterized in that: the ultrasonic sensor comprises a shell, an ultrasonic sensor, a board card, a loudspeaker and a display screen; the ultrasonic sensor, the board card, the loudspeaker and the display screen are respectively arranged in the shell, an installation cavity is formed in the shell, and the ultrasonic sensor, the loudspeaker and the display screen are electrically connected with the board card and are arranged in the installation cavity of the shell; the ultrasonic sensor comprises an ultrasonic sensor wafer, the front surface of the ultrasonic sensor wafer faces the outside of the installation cavity, the back surface of the ultrasonic sensor wafer faces the inside of the installation cavity, no partition plate or baffle plate is arranged between the back surface of the ultrasonic sensor wafer and the board card, the back surface of the ultrasonic sensor wafer and the board card are mutually communicated in space, and the display screen is installed on the front surface of the shell.

2. The integrated doppler fetal heart monitor of claim 1, wherein: one or more of the ultrasonic sensor wafers; the ultrasonic sensor wafer is mounted at a bottom end of the housing.

3. The integrated doppler fetal heart monitor of claim 2, wherein: the loudspeaker is arranged at the top end of the shell or at two sides of the display screen or at the front of the shell.