CN105675117B - A kind of telescopic electronics hearing prosthesis - Google Patents
A kind of telescopic electronics hearing prosthesis Download PDFInfo
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- CN105675117B CN105675117B CN201610015591.9A CN201610015591A CN105675117B CN 105675117 B CN105675117 B CN 105675117B CN 201610015591 A CN201610015591 A CN 201610015591A CN 105675117 B CN105675117 B CN 105675117B
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Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01H—MEASUREMENT OF MECHANICAL VIBRATIONS OR ULTRASONIC, SONIC OR INFRASONIC WAVES
- G01H11/00—Measuring mechanical vibrations or ultrasonic, sonic or infrasonic waves by detecting changes in electric or magnetic properties
- G01H11/06—Measuring mechanical vibrations or ultrasonic, sonic or infrasonic waves by detecting changes in electric or magnetic properties by electric means
- G01H11/08—Measuring mechanical vibrations or ultrasonic, sonic or infrasonic waves by detecting changes in electric or magnetic properties by electric means using piezoelectric devices
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Abstract
The invention discloses a kind of telescopic electronics hearing prosthesis, comprising: pickup unit；The telescopic rod being connected with the pickup unit；The audition unit being connected with the telescopic rod；The cable being electrically connected with the pickup unit and the audition unit；Wherein: the pickup unit and the audition unit are telescopically connected to by the telescopic rod, it can change the length of telescopic electronics hearing prosthesis by stretching, compressing the telescopic rod, and the piezoelectricity sound pickup sensor being mounted in the pickup unit is connected with the signal processing circuit being mounted on inside the audition unit by the cable in the telescopic rod, the connection and transmission of electric signal are completed, driving solid conduction earphone is directly by audition head audition after the signal of piezoelectricity sound pickup sensor is carried out signal processing by the signal processing circuit.The present invention completes solid conduction pickup to the complete procedure of solid conduction audition, listens the physical process of clave audition completely the same with common metal, and on the other hand the voice signal after conditioning carries out wireless transmission.
Description
Technical field
The present invention relates to a kind of for judging to rotate mechanical operation conditions, pipe leakage, gas leakage, the permeable sound of underground coal mine
Electronic type hearing prosthesis belongs to mechanical fault diagnosis technical field.
Background technique
Audition detection is to check to rotate mechanical operation conditions, pipe leakage, gas leakage, the ideal work of the permeable sound of underground coal mine
Tool, traditional audition detection are to hear sound by solid conduction principle vibration ear-drum by picking up the vibration signal of detection position
Sound can accurately judge position and the property of defect, be each row such as petroleum, chemical industry, power generation, metallurgy, mine, coal mine, machinery
The ideal checking tool of industry.Very widely used today is exactly that metal listens clave, actually a metal bar, end thereof contacts quilt
Measurement equipment, end thereof contacts cheekbone, and hear by way of solid conduction and osteoacusis the voice signal of detection position.This side
Formula is simple, practical, but since what different occasions needed different length listens clave, needs to prepare the audition of plurality of specifications length
Stick is inconvenient inspection on site；In addition, since direct solid conduction voice signal is very weak, especially in noisy ring
Border increases difficulty to useful signal is identified；Third, this mode simultaneously can only a people go to monitor, for complicated, difficult letter
Number can not accomplish more people while listening for and the consultation of doctors, be unfavorable for comprehensive descision；4th, it can not accomplish the storage of signal and believe with history
Number compare, can not science judgment equipment cracking trend.
Summary of the invention
It is equally based on solid conduction principle, the present invention provides one kind can be with solid conduction pickup, telescopic, electronic signal
Amplification, solid conduction audition, the hearing process for listening clave completely the same with conventional metals, and there is radio transmitting device, it can
To realize wireless receiving audition, can be transferred signals to for more people while listening for also can use wireless frequency modulation reception USB card
Computer is handled by computer software and is stored, and specific technical solution is as follows:
A kind of telescopic electronics hearing prosthesis, comprising: pickup unit；The telescopic rod being connected with the pickup unit；With institute
State the connected audition unit of telescopic rod；The cable being electrically connected with the pickup unit and the audition unit, in which: described to stretch
The pickup unit and the audition unit are telescopically connected to by contracting bar, can be changed by the telescopic rod for stretching, compressing described
Elongated degree, and the cable by being mounted in the telescopic rod passes the piezoelectricity pickup being mounted in the pickup unit
Sensor is connected with the signal processing circuit being mounted on inside the audition unit, completes the connection and transmission of electric signal, described
What signal processing circuit was completed to pick up piezoelectricity sound pickup sensor listens sound signal to carry out signal processing completion driving solid conduction ear
Machine is directly by audition head audition.
Preferably, pickup unit described in above-described embodiment includes: magnetic conehead, pickup body lower part, piezoelectricity pickup biography
Sensor, compressed spring, pickup body top, in which: it is described magnetism conehead and pickup body lower part be integrated, be by magnetic material
Material production, conehead part carries out processing of magnetizing, for audition unit accurately to be navigated to detection position；The piezoelectricity pickup passes
Sensor is placed in the plane of the pickup body lower part rear end boss, for picking up vibration signal and the conversion of detection position
At charge signal；The compressed spring, for by the piezoelectricity sound pickup sensor and the pickup body lower part rear end boss
Contact surface is closely pushed down and is in close contact；The rear end boss of audition body lower part and the groove on pickup body top are closely detained
It is connected together, forms a space；The piezoelectricity sound pickup sensor and the compressed spring be mounted on audition body lower part with
In the space for the formation that pickup body top closely snaps together；The piezoelectricity sound pickup sensor picks up the charge letter of sound
It number is gone out by the cable transmission.
Preferably, audition unit described in above-described embodiment includes: audition body lower part, signal processing circuit, audition body
Top, solid conduction earphone and audition head, in which: the input of the signal processing circuit is received by the cable and picks up sound
Charge signal；The output of the signal processing circuit is connected to solid conduction earphone；On the solid conduction earphone and audition body
Portion is embedded in by tight fit and is connected；Audition body lower part is snapped together with audition body top tight fit, forms described listen
Sound unit.
Preferably, signal processing circuit described in above-described embodiment includes: pre-amplification circuit, audio power amplifying circuit
And radio transmitter, in which: the preamplifier will pick up the charge signal of sound by cable connection, be put by charge
Big device carries out charge to the charge signal for picking up sound and is amplified and converted to voltage signal, then to the sound of voltage output
Sound signal carries out high-pass filtering and low-pass filtering treatment, and finally by gain amplifying circuit, to filter circuit, treated that output is believed
It number is further amplified, guarantees the needs of subsequent conditioning circuit；
On the one hand, the output of the input connection gain amplifying circuit of the audio-frequency power amplifier, and the gain is put
Signal after big carries out Audio power amplifier, and the output of the audio-frequency power amplifier connects solid conduction earphone；
On the other hand, the input of the radio transmitter also connects the output of gain amplifying circuit, and to the gain
Amplified signal carries out wireless transmission, this transmit circuit can there are many forms, the present embodiment to select FM radio transmissions；
Preferably, in above-described embodiment to the radio transmitter can with its wireless transmission principles is consistent connects
Receiving apparatus receive and is transferred to computer by USB interface, and can use voice processing software can be recorded and be deposited
Storage.
Preferably, matched radio receiver can be used to the radio transmitter in above-described embodiment
It is received, may finally hear the voice signal that piezoelectricity sound pickup sensor picks up, using FM transmission in the present embodiment,
This radio receiver can be FM receiver or FM reception earphone, this frequency modulation radio reception device is not this implementation
Example included.
As seen from the above technical solution, telescopic electronics hearing prosthesis provided by the invention, by piezoelectricity sound pickup sensor,
The voice signal of pickup is converted into charge signal in a manner of solid conduction, further passes through charge amplifier, filtered electrical
Road and gain amplifying circuit improve the voice signal of pickup, on the one hand the voice signal after conditioning carries out power and puts
Greatly, solid conduction earphone is driven, solid conduction pickup can be completed to solid conduction audition with audition by contacting cheekbone by audition head
Complete procedure, listen the physical process of clave audition completely the same with common metal, on the other hand by conditioning after sound
Signal carries out wireless frequency modulation transmitting, can receive USB card with wireless frequency modulation and receive, connect computer and utilize voice processing software
It can be recorded, be stored and comparative analysis, while audition, such as FM receiver can also be carried out with frequency modulation radio reception device
Or FM reception earphone.
Detailed description of the invention
It, below will be to embodiment or existing skill in order to illustrate more clearly of the present embodiment or technical solution in the prior art
Attached drawing needed in art description is introduced, it should be apparent that, the accompanying drawings in the following description is only to remember in the present invention
The some embodiments carried for those of ordinary skill in the art without creative efforts, can be with root
Other attached drawings are obtained according to these attached drawings.
Fig. 1 is telescopic electronics hearing prosthesis structure chart of the invention；
Fig. 2 is the pickup unit structure chart of Fig. 1；
Fig. 3 is the audition cellular construction figure of Fig. 1；
Fig. 4 is signal processing circuit schematic diagram of the invention；
Fig. 5 is that wireless frequency modulation of the invention receives USB card circuit diagram.
Specific embodiment
Technical solution in order to enable those skilled in the art to better understand the present invention, below in conjunction with of the invention real
The attached drawing in example is applied, technical scheme in the embodiment of the invention is clearly and completely described, it is clear that described implementation
Example is only a part of the embodiment of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, this field is common
Technical staff's every other embodiment obtained without making creative work, all should belong to protection of the present invention
Range.
Further detailed description is done below in conjunction with basic structure of the attached drawing to the present embodiment.
It is a kind of telescopic electronics hearing prosthesis of the invention, by pickup unit (1), telescopic rod (2), audition referring to Fig. 1
Unit (3) and cable (4) composition, in which:
Telescopic rod (2) is unlimited length, hollow stem not less than two sections, and each hollow stem that saves is nested together, can
To complete to stretch and compress, the variation of length is realized；
Referring to fig. 2, pickup unit (1) includes: magnetic conehead (14), pickup body lower part (13), piezoelectricity sound pickup sensor
(16), cable (4) composition of compressed spring (15), pickup body top (12) and electrical connection, wherein；The magnetism conehead (14)
It is integrated with pickup body lower part (13), is made by magnetic material, conehead part carries out processing of magnetizing, and is used for pickup
Unit (1) accurately navigates to detection position；
The piezoelectricity sound pickup sensor (16) is placed in the plane of pickup body lower part (13) rear end boss, uses
In the vibration signal for picking up detection position and it is converted into charge signal；
The compressed spring (15), for by the piezoelectricity sound pickup sensor (16) and the pickup body lower part (13)
Rear end boss contact surface is closely pushed down and is in close contact；
The rear end boss of pickup body lower part (13) and the groove on pickup body top (12) closely snap together,
Form a space；
The piezoelectricity sound pickup sensor (16) and the compressed spring (15) are mounted on pickup body lower part (13) and institute
In the space for stating the formation that pickup body top (12) closely snaps together；
The charge signal that the piezoelectricity sound pickup sensor (16) picks up sound is transferred out by the cable (4).
Referring to Fig. 3, audition unit (3) includes: audition body lower part (33), signal processing circuit (35), audition body top
(32), solid conduction earphone (34) and audition head (31), in which: the input of the signal processing circuit (35) passes through the cable
(4) charge signal for picking up sound is received；
The output of the signal processing circuit (35) is connected to the solid conduction earphone (34)；
The solid conduction earphone (34) and audition body top (32) are embedded in together by tight fit；
Audition body lower part (33) is snapped together with audition body top (32) tight fit, forms the audition
Unit (3)；
Audition body top (32) and the audition head (31) be it is integrated, the audition head is spherical.
Referring to fig. 4, the signal processing circuit (35) includes: pre-amplification circuit (351), audio power amplifying circuit
(352), radio transmitter (353) and power circuit (354)；
The preamplifier (351) will connect the charge signal for picking up sound by cable (4), be amplified by charge
Device carries out charge to the charge signal for picking up sound and is amplified and converted to voltage signal, then to the sound of voltage output
Signal carries out high-pass filtering and low-pass filtering treatment, finally by gain amplifying circuit to filter circuit treated output signal
It is further amplified, guarantees the needs of subsequent conditioning circuit；
On the one hand, the output of the input connection gain amplifying circuit of the audio-frequency power amplifier (352), and to the increasing
The amplified signal of benefit carries out Audio power amplifier, and the output of the audio-frequency power amplifier (352) connects solid conduction earphone
(34)；
On the other hand, the input of the radio transmitter (353) also connects the output of gain amplifying circuit, and to described
The amplified signal of gain carries out wireless transmission；
Referring to Fig. 5, it is preferable that further include: wireless frequency modulation receive USB card circuit (355) and wireless universal reception device into
Row receives.
Basic structure and composition is described above, below in conjunction with attached drawing again to electrical connection and working principle in the present embodiment
Do further detailed description.
It is referring to fig. 4 signal processing circuit (35), comprising: pre-amplification circuit (351), audio power amplifying circuit
(352) and radio transmitter (353) and power supply (354) composition；
Pre-amplification circuit (351) effect is to handle the voice signal of pickup, comprising:
Charge amplifier (U1A) is made of high impedance, low-voltage operational amplifier LMV822 and peripheral cell, and completing will
Piezoelectricity sound pickup sensor exports faint charge signal and becomes voltage signal suitably to be amplified again, the output electricity of this amplifier
Pressure is only related with the quantity of electric charge that the size of feedback capacity, piezoelectrics generate, and the nothings such as capacitor with the capacitor of piezoelectrics, cable
It closes, therefore the output voltage of U1A is that the charge generated with piezoelectric acoustic sensor has relationship, it is unrelated with the length of cable (4),
It therefore can accurate transmission measurement signal.Capacitor C1 and R1 is to limit high frequency response in a suitable range, capacitor C2
For feedback capacity, the size of output voltage is determined, resistance R2 is stable operating point setting.
Gain amplifying circuit (U1B) is further to amplify the measured value for converting voltage signal, it is ensured that follow audio
The needs of power amplification and frequency-modulated transmitter.Capacitor C3 and resistance R3 forms high-pass filter, mainly filters out the low frequency of 50hZ
Interference, capacitor C4 and resistance R6, R7, R8 and operational amplifier U1B form inverting amplifier, and the size for adjusting R7 is adjustable defeated
The size of voltage out.
Resistance R4 and R5 are two equal resistance, form half volt circuit as the non-inverting input terminal of U1A and U1B and provide biasing
Voltage guarantees the output area of output signal.
Audio power amplifying circuit (352) is by the signal of preamplifier processing, and further amplification is to drive solid
It conducts earphone (34).Integrated circuit HT6879 (U4) is the ultralow EMI of a high-fidelity, is internally integrated the control of 32 rank digital volumes
And exempt from filtering D-type audio power amplifier with the anti-top distortion that disappears.It is anti-cut top distortion function can detect and inhibit due to music,
The output that speech signal amplitude is excessive or cell voltage decline is caused, which disappears, pushes up distortion, significantly improves sound quality.For different demands,
Anti- top of cutting has ACF-1 and ACF-2 both of which, respectively corresponds about 3% and 10% maximum THD+N, while having ACF-OFF mould
Formula.
HT6879 can use differential input and single ended input, and the voice signal for being converted to single ended voltage is coupled to through C10
5 feet (IN+) of HT6879, while 4 feet (IN-) are grounded by capacitor C11, the capacity of C10 and C11 is identical, meets single ended input
Condition.HT6879 can be by external terminal 2 (UP), the 32 very big control function of rank digital volume of pin 3 (DN) Lai Shixian, in figure
S2 is volume up button, S3 is volume down button, and resistance R10, R11 are pull-up resistor, when guaranteeing that S2 and S3 is not pressed
UP and DN is high level.10 feet (CTRL) are scheme control end, and different voltage values is inputted at the end CTRL, is able to achieve 4 kinds of works
Operation mode, i.e., the anti-top-mould type 1 (ACF-1) that disappears, the anti-top-mould type 2 (ACF-2) that disappears, it is anti-disappear push up function close pattern (ACF-OFF) and
Chip shutdown mode (SD), specifically see the table below:
| Mode setting threshold voltage | Symbol | Minimum value | Ideal value | Maximum value | Unit |
| ACF-OFF mode | VMOD1 | 2.00 | VDD | VDD | V |
| ACF-1 mode | VMOD2 | 1.55 | 1.70 | 185 | V |
| ACF-2 mode | VMOD3 | 1.10 | 1.25 | 1.40 | V |
| SD mode | VMOD4 | VSS | 0 | 0.30 | V |
Voltage value by changing the end CTRL can change control model, can be with the low and high level of microprocessor I/O port
And the switching of 4 kinds of modes of form control by electric resistance partial pressure, the present apparatus use ACF-1 fixed mode, only by resistance R8 and
R9 partial pressure, makes the end CTRL voltage 1.70V, capacitor C12 play burning voltage.
The voice signal of audio-signal-driven solid conduction earphone (34) by power amplification, output passes through audition head
(31) cheekbone is contacted, so that it may hear the voice signal of pickup.
Radio transmitter (353) is to launch the voice signal of pickup by the way of FM transmission, frequency modulation hair
Penetrating working principle is: the audio signal Jing Guo preposition amplification, and another way enters FM transmission chip U3, carries out FM transmission, should
Voice signal is sent to QN8027 through C5, C6 coupling.Integrated circuit QN8027 (U3) is a high-performance, low energy consumption, Full Featured
Stereo fm emits single-chip, it is integrated with the functions such as complete FM transmitting, empty station scanning and antenna automatic tuning.Branch
Hold global FM wave band transmitting, 76MHz~108MHz all band, step-length 50/100/200kHz.The 3 foot VCC of U3 are derived from the battery of 3V
BT1,8 foot VIO are system I/O threshold voltages, and for 3V power supply system VIO, directly it is connected with VCC.1 foot and 2 feet are external stone
English crystal oscillator, forms oscillation circuit by Y2, C8 and C9, provides reference oscillation source for U3.6 foot SCL and 7 foot SDA are that I2C is total
Line communication interface can be written and read QN8027 register by microprocessor (U2), complete tranmitting frequency, transmission power etc.
The setting of parameter, 10 foot ALI and 9 foot ARI are respectively left and right sound channels input terminal, and 5 foot RFO are external antenna output end, it is contemplated that
The influence inductance coil L1 of parasitic inductance when wiring board is routed chooses a suitable value between 100nH -150nH.
Microprocessor U2 is P89LPC901, it is a only 8 pins, the single chip package that can have up to 6 I/O ports
Microcontroller, be suitable for it is many require high integration, low cost occasions, due to use high performance processor structure,
Time for each instruction only needs 2 to 4 clock cycle.The present apparatus is configured U3 just with the I/O port simulation I2C communication of U2,
So two I/O ports of P0.4 and P0.5 are only utilized, other I/O ports are not used.Due to two signal SCL in I2C communications protocol
It is required to be open collector output with SDA, so P0.4 (SCL) and P0.5 (SDA) are set as open collector output, resistance
R12 and R13 is pull-up resistor, guarantees I2C normal communication.
Power supply circuit (354) is that the present embodiment provides DC power supplies, using 3.6V lithium battery power supply.By lower switch
S1, circuit engaging means are started to work, and trip switch S1, circuit disconnects device and stops working, and capacitor C14 and C15 are to stablize
Voltage setting.
Referring to Fig. 5 be wireless frequency modulation receive USB card circuit diagram, integrated circuit QN8025 (U6) be a high-performance,
Low energy consumption, Full Featured stereo fm receive single-chip, are primarily adapted for use in mobile phone, MP3 player and portable radio etc.,
Support whole world FM band reception, 76MHz~108MHz all band receives, step-length 50/100/200kHz.The 24 foot VCC of U6 are electricity
Source pin connects 3V power supply, which is system I/O threshold voltage from 13,10 foot VIO of MT402 (U7) REGV pin, for 3V
Directly it is connected power supply system VIO with VCC, and 11 foot CEN are that piece selects enable end, and high level is enabled, is fixedly connected in the present apparatus
To VCC.17 feet and 18 feet are external quartz oscillator, form oscillation circuit by Y3, C16 and C17, provide benchmark vibration for U6
Swing source.22 foot SCL and 23 foot SDA are I2C bus communication interface, are connected with microprocessor P89LPC901 (U5), can by programming
To be written and read to QN8025 register, the setting for receiving the parameters such as frequency is completed, 1 foot ALO and 2 foot ARO are respectively left and right sound
Road output end, 7 foot RFO are antenna input, and the FM signal of emitter sending is received by antenna (8), passes through coupling
Capacitor C18 is input to 7 feet of QN8025 chip.
Audio AD conversion chip MT402 (U7) is a kind of monophonic USB microphone scheme, built-in sigma-delta ADC,
Microphone preamplifier gain amplifying circuit, phaselocked loop, volume gain adjuster and USB transceiver.It is to be very suitable to microphone, preceding
The application of confidence number recording.1 foot, the end DM and DP that 2 feet are USB interface, 4 foot MODE are Mike's mode enable end, it is necessary to meet 3V
High level, 6 foot VBIAS are microphone bias level, due to the output signal that prime is QN8025 in the present apparatus, do not need to bias
Voltage, this pin is not connected, and 13 feet are the low-dropout regulator of built-in 3V output, can use for 3V device, C24 and C25 are
Filter capacitor stablizes the setting of 3V voltage, and 15 feet, 16 feet are crystal oscillator input and output side, forms crystalline substance by Y4, C22 and C23
Oscillation body circuit provides reference oscillation source for U7.
QN8025 output end signal ALO or ARO, the signal input part 8 of MT402 (U7) is coupled to through capacitor C19 or C20
Foot, C21 are the filter capacitor of internal reference power supply, are connected by USB interface DM and DP with computer USB port after U7 is handled.Figure
Middle P1 is USB interface, and it is U7 analog power AVDD and digital power DVDD power supply, while through 13 feet that+5V power supply, which is USB power source,
Voltage-stablizer exports 3V power supply, uses for U5 and U6.
The above is the specific embodiment of the embodiment of the present invention, it is noted that for the common skill of the art
For art personnel, various improvements and modifications may be made without departing from the principle of the present invention, these improvements and modifications
Also it should be regarded as protection scope of the present invention.
Claims (5)
1. a kind of telescopic electronics hearing prosthesis characterized by comprising
Pickup unit；
The telescopic rod being connected with the pickup unit；
The audition unit being connected with the telescopic rod；
The cable being electrically connected with the pickup unit and the audition unit；Wherein:
The pickup unit and the audition unit are telescopically connected to by the telescopic rod, by stretching, compressing described stretch
Contracting bar can change the length of telescopic electronics hearing prosthesis, and will be mounted in the telescopic rod by the cable described
Piezoelectricity sound pickup sensor in pickup unit is connected with the signal processing circuit being mounted on inside the audition unit, completes electrical
The connection and transmission of signal, the signal processing circuit drive solid after the signal of piezoelectricity sound pickup sensor is carried out signal processing
Earphone is conducted directly by audition head audition；
The pickup unit includes: the magnetic conehead positioned at pickup unit front, pickup body lower part, piezoelectricity sound pickup sensor, pressure
Contracting spring and pickup body top；
Wherein, the pickup body lower front part is the magnetic conehead, for pickup unit accurately to be navigated to detection
Position, the piezoelectricity sound pickup sensor are placed in the plane of the pickup body lower part rear end boss, for picking up detection
The vibration signal at position is simultaneously converted into charge signal, the compressed spring, for by the piezoelectricity sound pickup sensor and institute
The pickup body lower part rear end boss contact surface stated closely is pushed down and is in close contact, the rear end of the pickup body lower part of the pickup unit
Boss is closely snapped together with the concave of pickup body top, forms a space, the piezoelectricity sound pickup sensor and institute
State the formation that compressed spring is mounted on the pickup body lower part of the pickup unit and pickup body top closely snaps together
Space in, the voice signal that the piezoelectricity sound pickup sensor picks up is gone out by the cable transmission.
2. telescopic electronics hearing prosthesis according to claim 1, which is characterized in that further include: the telescopic rod is empty
The heart, at least two sections, between it is nested against one another, length does not limit, and the cable is mounted in the telescopic rod.
3. telescopic electronics hearing prosthesis according to claim 1, which is characterized in that the audition unit further include: listen
Sound body top, audition body lower part, solid conduction earphone and audition head；
Wherein, audition body lower part and audition body top are all hollow, can be snapped together, centre is equipped with letter
Number processing circuit, the signal processing circuit input terminal receive the voice signal that cable transfer comes, the signal processing
The output signal of circuit drives the solid conduction earphone, and the solid conduction earphone and audition body top carry out tight fit insertion
Together；The audition head is spherical structure, contacts human body cheekbone by the audition head and carries out audition.
4. telescopic electronics hearing prosthesis according to claim 3, which is characterized in that before the signal processing circuit includes
Set amplifier circuit, audio power amplifying circuit and radio transmitter；
Preamplifier circuit includes charge amplifier, gain amplifying circuit and filter circuit, and charge amplifier is by piezoelectricity pickup
Sensor exports faint charge signal and becomes voltage signal to be amplified again, the voltage that filter circuit exports charge amplifier
Signal carries out high-pass filtering and low-pass filtering treatment, finally by gain amplifying circuit to filter circuit treated output signal
It is further amplified；
The output of the input connection gain amplifying circuit of audio-frequency power amplifier, and sound is carried out to the amplified signal of the gain
Frequency power amplification, the output of audio-frequency power amplifier connect solid conduction earphone；The input of radio transmitter also connects gain and puts
The output of big circuit, and wireless transmission is carried out to the amplified signal of gain.
5. telescopic electronics hearing prosthesis according to claim 4, which is characterized in that the signal processing circuit further includes
Perhaps wireless frequency modulation receives USB card radio receiver to radio receiver or wireless frequency modulation receives USB card and wireless transmission
Circuit communicates wirelessly.
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| CN108732633A (en) * | 2017-04-24 | 2018-11-02 | 广东建元和安科技发展有限公司 | Compound safety check instrument |
| CN108055616A (en) * | 2018-02-08 | 2018-05-18 | 广州市蓝深贸易有限公司 | A kind of musical instrument sound pick up equipment |
| CN108933977A (en) * | 2018-09-27 | 2018-12-04 | 江苏鹿得医疗电子股份有限公司 | Cardiopulmonary sound pick up equipment |
| CN110426121A (en) * | 2019-09-13 | 2019-11-08 | 顺德职业技术学院 | A kind of motor or engine abnormal noise detection device and method |
| CN111212271A (en) * | 2020-01-17 | 2020-05-29 | 深圳市惟新科技股份有限公司 | Portable mobile law enforcement terminal based on intelligent identification technology |
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Effective date of registration: 20210519 Address after: 130031 no.6898, donghuancheng Road, Erdao District, Changchun City, Jilin Province Patentee after: CHANGCHUN NO.2 CO-GENERATION POWER Co.,Ltd. Patentee after: Jiang Xiangdong Address before: No.6898, East Ring Road, Changchun City, Jilin Province, 130031 Patentee before: Jiang Xiangdong |