CN106885625B - Ultrasonic sound pressure and frequency measuring circuit - Google Patents
Ultrasonic sound pressure and frequency measuring circuit Download PDFInfo
- Publication number
- CN106885625B CN106885625B CN201710149111.2A CN201710149111A CN106885625B CN 106885625 B CN106885625 B CN 106885625B CN 201710149111 A CN201710149111 A CN 201710149111A CN 106885625 B CN106885625 B CN 106885625B
- Authority
- CN
- China
- Prior art keywords
- resistor
- capacitor
- twenty
- operational amplifier
- pin
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Classifications
-
- 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
Abstract
The invention belongs to the field of nano material preparation, and relates to an ultrasonic sound pressure and frequency measuring circuit which comprises a transmitting circuit module and a receiving circuit module. The transmitting circuit is simple and reliable and is easy to realize; the transmitting frequency can be adjusted according to the need; waveform generation is realized through hardware, programming is not needed, and development difficulty is reduced. The sound pressure range to be detected of the receiving circuit module can be adjusted through a potentiometer according to actual needs; the receiving circuit can work together with the transmitting circuit or can work independently, and the working mode is flexible; the adopted element device has low cost, rich sources and high integration level, and the two operational amplifier chips are used for realizing half-wave frequency measurement and accurate measurement of sound pressure, so that the cost and the power consumption are greatly reduced; the device is provided with a hardware windowing circuit, and after a measuring signal passes through a filtering circuit, harmful high-frequency components are filtered, so that the signal-to-noise ratio is improved, and a good signal is provided for A/D conversion.
Description
Technical Field
The invention belongs to the field of nano material preparation, relates to a measuring circuit, and in particular relates to a circuit for measuring ultrasonic sound pressure and frequency in liquid.
Background
In recent years, ultrasonic waves have been paid attention to in the field of nano-material preparation due to their advantages of simple operation, short period, high efficiency, and the like. The rapid development of nanotechnology has led to an attractive application prospect of ultrasound in the aspect of nanomaterial preparation. The energy characteristics and the frequency characteristics of ultrasonic waves are generally utilized simultaneously in the process of preparing the nanomaterial by applying ultrasonic waves. Specifically, such energy and frequency characteristics may manifest as pyrolysis, shear fracture, etc. during the preparation process. When the functions are applied to the solid-liquid surface, the shape, the composition, the structure, the chemical reactivity and the like of the solid surface are influenced, so that the aim of preparing the nano material is fulfilled.
An ultrasonic field refers to the portion of the medium in which ultrasonic waves propagate, i.e., the space occupied by the elastic medium in which ultrasonic waves exist. In the sound field, the energy characteristic is represented by sound pressure of ultrasonic waves, the frequency characteristic is represented by frequency of the ultrasonic waves, and in view of the significance of the sound pressure and the frequency in the sound field for measuring the performance of an ultrasonic system, the sound pressure and the frequency are accurately measured in the field of nano material preparation.
The action mechanism of ultrasonic waves in liquid is complex, cavitation effect can be generated by combining high-frequency sound waves with high enough energy, and cavitation bubbles can instantaneously generate local high-temperature and high-pressure environment. Measuring sound pressure and frequency in such sound field environments is a relatively complex challenge, and there is currently no fully developed measuring method.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides an ultrasonic sound pressure and frequency measuring circuit which measures the ultrasonic sound pressure and frequency as accurately as possible by controlling the receiving and transmitting states of an ultrasonic sensor.
In order to achieve the above purpose, the invention adopts the following technical scheme:
an ultrasonic sound pressure measuring circuit comprises a transmitting circuit module and a receiving circuit module.
The transmitting circuit module comprises a six-inverter chip U1, a time base circuit chip U2, a first resistor R1, a second resistor R2, a third resistor R3, a fourth resistor R4, a variable resistor R5, a sixth resistor R6, a first capacitor C1, a second capacitor C2, a first diode D1, a second diode D2 and a signal transmitting sensor LS1; the model of the time base circuit chip U2 is NE555; the model of the six-inverter chip U1 is CD4069;
one end of the first resistor R1 is connected with one end of the third resistor R3, the positive end of the first diode D1 and the seventh pin DISC of the time-base circuit chip U2, the other end of the first resistor R1 is connected with the fourth pin RST of the time-base circuit chip U2 and the eighth pin VCC of the time-base circuit chip U2 in parallel with a power supply VCC, the other end of the third resistor R3 is connected with the negative end of the second diode D2, and the negative end of the first diode D1 is connected with the positive end of the second diode D2 and the fixed end of the variable resistor R5; the sixth pin THR of the time base circuit chip U2 is connected with the second pin TRIG, the movable end of the variable resistor R5 and one end of the second capacitor C2, the fifth pin CVOLT of the time base circuit chip U2 is connected with one end of the first capacitor C1, the other end of the first capacitor C1 is connected with the other end of the second capacitor C2, the first pin GND of the time base circuit chip U2 and one end of the sixth resistor R6 is connected with the ground GND, the other end of the sixth resistor R6 is connected with the third pin OUT of the time base circuit chip U2 and the 1 pin of the sixth inverter U1, the 2 pin of the sixth inverter U1 is connected with the 3 pin of the sixth inverter U1, the 13 pin of the sixth inverter U1 and the 11 pin of the sixth inverter U1, the 4 pin of the sixth inverter U1 is connected with the 5 pin of the sixth inverter U1, the 9 pin of the sixth inverter U1, the 7 pin of the sixth inverter U1 is connected with the ground GND, the 14 pin of the sixth inverter U1 is connected with the power supply VCC, the 12 pin of the sixth inverter U1 is connected with the 12 pin of the sixth inverter U1, the other end of the sixth inverter U1, the signal of the fourth resistor R2 is connected with the other end of the fourth resistor R1 and the fourth resistor R1 is connected with the other end of the fourth resistor R1;
the receiving circuit module comprises a signal receiving sensor LS2, a double operational amplifier U4, a four operational amplifier U3, a third diode D3, a fourth diode D4, a seventh resistor R7, an eighth resistor R8, a ninth resistor R9, a tenth resistor R10, an eleventh resistor R11, a twelfth resistor R12, a thirteenth resistor R13, a fourteenth resistor R14, a fifteenth resistor R15, a sixteenth resistor R16, a seventeenth resistor R17, an adjustable resistor R18, a nineteenth resistor R19, a twentieth resistor R20, a twenty first resistor R21, a twenty second resistor R22, a twenty third resistor R23, a twenty fourth resistor R24, a twenty fifth resistor R25, a twenty sixth resistor R26, a twenty seventh resistor R27, a twenty eighth resistor R28, a twenty ninth resistor R29, a thirty third capacitor C3, a fourth capacitor C4, a fifth capacitor C5, a sixth capacitor C6, a seventh capacitor C7, an eighth capacitor C8, a twenty eighth capacitor C9, a nineteenth capacitor C10, a seventeenth capacitor C12 and a fifteenth capacitor C13; the double operational amplifier U4 comprises a first operational amplifier U4A and a second operational amplifier U4B; the fourth operational amplifier U3 comprises a third operational amplifier U3A, a fourth operational amplifier U3B, a fifth operational amplifier U3C and a sixth operational amplifier U3D; the model of the dual operational amplifier U4 is LM358, and the model of the four operational amplifier U3 is LM324;
one end of the signal receiving sensor LS2 is grounded, the other end is connected with one end of an eighth resistor R8, the other end of the eighth resistor R8 is connected with a seventh capacitor C7, the other end of the seventh capacitor C7 is connected with one end of a twelfth resistor R12, one end of a sixth capacitor C6 and an inverting input end of a second operational amplifier U4B, one end of a twenty-fourth resistor R20 is connected with a power supply VCC, the other end of the twenty-fourth resistor R20 is connected with one end of a twenty-fourth resistor R24, one end of the twelfth capacitor C12 and a normal phase input end of the second operational amplifier U4B, the other end of the twenty-fourth resistor R24 is connected with the other end of the twelfth capacitor C12 and grounded, the other end of the twelfth resistor R12 is connected with the other end of the sixth capacitor C6, the output end of the second operational amplifier U4B, one end of the tenth resistor R10 and one end of the twenty-fifth resistor R25, the other end of the tenth resistor R10 is connected with the inverting input end of the third operational amplifier U3A, the negative end of the third diode D3, one end of the eighteenth resistor R18 and one end of the ninth capacitor C9, the output end of the third operational amplifier U3A is connected with the positive end of the third diode D3, the negative end of the fourth diode D4, one end of the eleventh resistor R11 and one end of the twenty-first resistor R21, the positive phase input end of the third operational amplifier U3A is connected with the ground GND, the positive power end of the third operational amplifier U3A is connected with +5V, the negative power end of the third operational amplifier U3A is connected with-5V, the positive end of the fourth diode D4 is connected with the other end of the eighteenth resistor R18 and the other end of the ninth capacitor C9, the other end of the eleventh resistor R11 is connected with one end of the seventh resistor R7, one end of the third capacitor C3 and the inverting input end of the fourth operational amplifier U3B, the positive phase input end of the fourth operational amplifier U3B is connected with the fourteenth resistor R14, the other end of the fourteenth resistor R14 is connected with the ground GND, the output of the fourth operational amplifier U3B is connected with the other end of the seventh resistor R7, the other end of the third capacitor C3 and one end of the thirteenth resistor R13, the other end of the thirteenth resistor R13 is connected with one end of the fourth capacitor C4, one end of the fifth capacitor C5 and one end of the fifteenth resistor R15, the other end of the fifteenth resistor R15 is grounded, one end of the ninth resistor R9 is connected with the other end of the fifth capacitor C5 and the inverting input end of the first operational amplifier U4A, the positive power end of the first operational amplifier U4A is connected with +5v, the negative power end of the first operational amplifier U4A is connected with-5V, one end of the sixteenth resistor R16 is connected with the power VCC, the other end of the sixteenth resistor R16 is connected with one end of the seventeenth resistor R17, one end of the eighth capacitor C8 and the positive input end of the first operational amplifier U4A, and the other end of the seventeenth resistor R17 is connected with the ground. The other end of the fourth capacitor C4 is connected to the other end of the ninth resistor R9 and the output end of the first operational amplifier U4A, and outputs a frequency measurement signal FREQ. The other end of the twenty-first resistor R21 is connected with the inverting input end of the sixth operational amplifier U3D, the other end of the twenty-fifth resistor R25, one end of the twenty-third resistor R23 and one end of the eleventh capacitor C11, the normal phase input end of the sixth operational amplifier U3D is connected with one end of the thirty-second resistor R30, the other end of the thirty-second resistor R30 is connected with the ground, the output end of the sixth operational amplifier U3D is connected with the other end of the twenty-third resistor R23, the other end of the eleventh capacitor C11 and one end of the twenty-ninth resistor R29, the other end of the twenty-ninth resistor R29 is connected with the normal phase input of the fifth operational amplifier U3C, the negative phase input of the fifth operational amplifier U3C is connected with the active end of the adjustable resistor R19, one end of the twenty-second resistor R22 and one end of the tenth capacitor C10, the other end of the adjustable resistor R19 is connected with the ground, the output end of the fifth operational amplifier U3C is connected with one end of a twenty-sixth resistor R26, the other end of a twenty-second resistor R22 and the other end of a tenth capacitor C10, one end of a twenty-seventh resistor R27 at the other end of the twenty-sixth resistor R26 and one end of a thirteenth capacitor C13 are connected, the other end of the twenty-seventh resistor R27 is connected with one end of a twenty-eighth resistor R28 and one end of a fourteenth capacitor C14 respectively, the other end of the thirteenth capacitor C13 is connected with the other end of the fourteenth capacitor C14 and one end of a fifteenth capacitor C15 respectively and then is connected with the ground GND, and the other end of the twenty-eighth resistor R28 is connected with the other end of the fifteenth capacitor C15 and serves as an output V_DC of a sound pressure measurement signal.
The sound pressure and frequency measuring circuit has the beneficial effects that: the transmitting circuit is simple and reliable and is easy to realize; the transmitting frequency can be adjusted according to the need; waveform generation is realized through hardware, programming is not needed, and development difficulty is reduced. The sound pressure range to be detected of the receiving circuit module can be adjusted through a potentiometer according to actual needs; the receiving circuit can work together with the transmitting circuit or can work independently, and the working mode is flexible; the adopted element device has low cost, rich sources and high integration level, and the two operational amplifier chips are used for realizing half-wave frequency measurement and accurate measurement of sound pressure, so that the cost and the power consumption are greatly reduced; the device is provided with a hardware windowing circuit, and after a measuring signal passes through a filtering circuit, harmful high-frequency components are filtered, so that the signal-to-noise ratio is improved, and a good signal is provided for A/D conversion.
Drawings
FIG. 1 is a schematic diagram of a transmitting circuit module of the present invention;
fig. 2 is a schematic diagram of a receiving circuit module according to the present invention.
Detailed Description
The following describes a specific embodiment of the technical scheme of the ultrasonic sound pressure and frequency measuring circuit according to the present invention with reference to the accompanying drawings.
An ultrasonic sound pressure and frequency measuring circuit comprises a transmitting circuit module and a receiving circuit module.
As shown in fig. 1, in the transmitting circuit module, a multivibrator circuit is formed by an NE555 time-base integrated chip, and the whole circuit works in a monostable mode. When the second capacitor C2 is charged, the first resistor R1 and the adjustable resistor R5 are used for charging, when the second capacitor C2 is discharged, the adjustable resistor R5 is used for discharging, the values of the first resistor R1, the second capacitor C2 and the adjustable resistor R5 are adjusted to achieve signal generation of different frequencies from 20KKHz to 300KHz, an output signal is loaded onto an input port of one inverter of the six inverters U1 and is divided into two parts after being inverted, one part passes through two parallel inverters, the other part passes through the two parallel inverters after being inverted, the signals are amplified in a push-pull mode through a plurality of inverters in a multistage increasing mode, and then the ultrasonic signal transmitting sensor LS1 is driven.
As shown in fig. 2, in the receiving circuit module, the sound pressure signal is received by the ultrasonic signal receiving sensor LS2 and is sent to the second operational amplifier U4B for processing, and this circuit realizes the low-pass filtering function of the original signal, and the voltage amplification factor in the passband of the circuit is the first resistor R1 divided by the second resistor R2, and the value of the twelfth resistor R12 and the sixth capacitor C6 is set to adjust the cut-off frequency of the low-pass filtering circuit. In the third operational amplifier U3A, the tenth resistor R10 and the eighteenth resistor R18 are the same, and the third diode D3 and the fourth diode D4 realize the reverse interception of signals and prevent the forward signals from passing through. The signal retains the negative half-cycle signal when the signal input signal is output through the third operational amplifier U3A section. And when the fourth operational amplifier U3B part outputs, the signal is inverted to realize half-wave signal output, wherein the eleventh resistor R11 and the seventh resistor R7 select the same value. The first operational amplifier U4A part realizes a multipath negative feedback second-order active band-pass filter, the fourth capacitor C4 and the fifth capacitor C5 select the same value, and the upper limit and the lower limit of the cut-off frequency can be adjusted by combining the ninth resistor R9, the thirteenth resistor R13 and the fifteenth resistor R15, so that the filter has very strong frequency selectivity, realizes the windowing processing of signals, greatly reduces the loss of measurement signals and outputs accurate frequency measurement signals. In the sixth operational amplifier U3D part, the twenty-fifth resistor R25 is half of the thirty-fifth resistor R30, the thirty-fifth resistor R30 and the twenty-ninth resistor R29 are the same, the input signals are overlapped through the output of the twenty-fifth resistor R25 and the twenty-first resistor R21, and the amplification and inversion of the signals are realized through the inversion of the twenty-fifth resistor R25, the twenty-third resistor R23 and the sixth operational amplifier U3D. In the fifth operational amplifier U3C part, the twenty-ninth resistor R29 and the adjustable resistor R19 are selected to be the same in value, the twenty-second resistor R22 is selected to be one tenth of the twenty-ninth resistor R29, signals are output by the twenty-ninth resistor R29 through the amplifier U1C to realize amplification of the signals, and the amplification factor of the output signals can be adjusted through the adjustable resistor R19. Finally, a filter circuit is formed by a twenty-sixth resistor R26, a thirteenth capacitor C13, a twenty-seventh resistor R27, a twelfth capacitor C14, a twenty-eighth resistor R28 and a fifteenth capacitor C15, noise generated by an operational amplifier is removed, the signal-to-noise ratio of an output signal is improved, and an excellent signal is provided for A/D conversion.
When measuring ultrasonic sound pressure and frequency, the traditional measuring method only comprises a receiving circuit, and the invention is innovatively added into a transmitting circuit. The receiving circuit can work together with the transmitting circuit or can work independently and independently. When the receiving circuit works together with the transmitting circuit, the sound pressure and frequency signal output end measures that the data contains known fixed sound pressure and frequency information; the accurate sound pressure and frequency data can be obtained by comparing the data measured by the sound pressure and frequency signal output ends when the receiving circuit works independently and comparing the different frequencies of the transmitting circuit when the receiving and transmitting circuits work together.
Finally, it should be noted that the above embodiments are only for illustrating the technical solution of the present invention and not for limiting the technical solution, and although the applicant has described the present invention in detail with reference to the preferred embodiments, modifications and equivalents of the technical solution of the present invention should be covered in the scope of the claims of the present invention without departing from the spirit and scope of the technical solution.
Claims (1)
1. An ultrasonic sound pressure and frequency measuring circuit comprises a transmitting circuit module and a receiving circuit module;
the method is characterized in that: the transmitting circuit module comprises a six-inverter chip U1, a time base circuit chip U2, a first resistor R1, a second resistor R2, a third resistor R3, a fourth resistor R4, a variable resistor R5, a sixth resistor R6, a first capacitor C1, a second capacitor C2, a first diode D1, a second diode D2 and a signal transmitting sensor LS1; the model of the time base circuit chip U2 is NE555; the model of the six-inverter chip U1 is CD4069;
one end of the first resistor R1 is connected with one end of the third resistor R3, the positive end of the first diode D1 and the seventh pin DISC of the time-base circuit chip U2, the other end of the first resistor R1 is connected with the fourth pin RST of the time-base circuit chip U2 and the eighth pin VCC of the time-base circuit chip U2 in parallel with a power supply VCC, the other end of the third resistor R3 is connected with the negative end of the second diode D2, and the negative end of the first diode D1 is connected with the positive end of the second diode D2 and the fixed end of the variable resistor R5; the sixth pin THR of the time base circuit chip U2 is connected with the second pin TRIG, the movable end of the variable resistor R5 and one end of the second capacitor C2, the fifth pin CVOLT of the time base circuit chip U2 is connected with one end of the first capacitor C1, the other end of the first capacitor C1 is connected with the other end of the second capacitor C2, the first pin GND of the time base circuit chip U2 and one end of the sixth resistor R6 is connected with the ground GND, the other end of the sixth resistor R6 is connected with the third pin OUT of the time base circuit chip U2 and the 1 pin of the sixth inverter U1, the 2 pin of the sixth inverter U1 is connected with the 3 pin of the sixth inverter U1, the 13 pin of the sixth inverter U1 and the 11 pin of the sixth inverter U1, the 4 pin of the sixth inverter U1 is connected with the 5 pin of the sixth inverter U1, the 9 pin of the sixth inverter U1, the 7 pin of the sixth inverter U1 is connected with the ground GND, the 14 pin of the sixth inverter U1 is connected with the power VCC, the 12 pin of the sixth inverter U1 is connected with the other end of the sixth inverter U1, the signal of the other end of the sixth inverter U1 is connected with the signal emitting end of the fourth resistor R1 and the other end of the sixth inverter U1, the fourth resistor R2 is connected with the other end of the fourth resistor R1 and the fourth resistor R1 is connected with the other end of the fourth resistor R1;
when the second capacitor C2 is charged, the first resistor R1 and the adjustable resistor R5 are used for charging, when the second capacitor C2 is discharged, the adjustable resistor R5 is used for discharging, the values of the first resistor R1, the second capacitor C2 and the adjustable resistor R5 are adjusted to realize the generation of signals with different frequencies from 20KKHz to 300KHz, output signals are loaded to the input port of one inverter of the six inverters U1, after inversion, the output signals are divided into two parts, one part passes through two parallel inverters, the other part passes through the two parallel inverters, the signal amplification is completed in a push-pull mode by utilizing a plurality of inverters in a multistage increment mode, and then the ultrasonic signal transmitting sensor LS1 is driven;
the receiving circuit module comprises a signal receiving sensor LS2, a double operational amplifier U4, a four operational amplifier U3, a third diode D3, a fourth diode D4, a seventh resistor R7, an eighth resistor R8, a ninth resistor R9, a tenth resistor R10, an eleventh resistor R11, a twelfth resistor R12, a thirteenth resistor R13, a fourteenth resistor R14, a fifteenth resistor R15, a sixteenth resistor R16, a seventeenth resistor R17, an adjustable resistor R18, a nineteenth resistor R19, a twentieth resistor R20, a twenty first resistor R21, a twenty second resistor R22, a twenty third resistor R23, a twenty fourth resistor R24, a twenty fifth resistor R25, a twenty sixth resistor R26, a twenty seventh resistor R27, a twenty eighth resistor R28, a twenty ninth resistor R29, a thirty third capacitor C3, a fourth capacitor C4, a fifth capacitor C5, a sixth capacitor C6, a seventh capacitor C7, an eighth capacitor C8, a twenty eighth capacitor C9, a nineteenth capacitor C10, a seventeenth capacitor C12 and a fifteenth capacitor C13; the double operational amplifier U4 comprises a first operational amplifier U4A and a second operational amplifier U4B; the fourth operational amplifier U3 comprises a third operational amplifier U3A, a fourth operational amplifier U3B, a fifth operational amplifier U3C and a sixth operational amplifier U3D; the model of the dual operational amplifier U4 is LM358, and the model of the four operational amplifier U3 is LM324;
one end of the signal receiving sensor LS2 is grounded, the other end is connected with one end of an eighth resistor R8, the other end of the eighth resistor R8 is connected with a seventh capacitor C7, the other end of the seventh capacitor C7 is connected with one end of a twelfth resistor R12, one end of a sixth capacitor C6 and an inverting input end of a second operational amplifier U4B, one end of a twenty-fourth resistor R20 is connected with a power supply VCC, the other end of the twenty-fourth resistor R20 is connected with one end of a twenty-fourth resistor R24, one end of the twelfth capacitor C12 and a normal phase input end of the second operational amplifier U4B, the other end of the twenty-fourth resistor R24 is connected with the other end of the twelfth capacitor C12 and grounded, the other end of the twelfth resistor R12 is connected with the other end of the sixth capacitor C6, the output end of the second operational amplifier U4B, one end of the tenth resistor R10 and one end of the twenty-fifth resistor R25, the other end of the tenth resistor R10 is connected with the inverting input end of the third operational amplifier U3A, the negative end of the third diode D3, one end of the eighteenth resistor R18 and one end of the ninth capacitor C9, the output end of the third operational amplifier U3A is connected with the positive end of the third diode D3, the negative end of the fourth diode D4, one end of the eleventh resistor R11 and one end of the twenty-first resistor R21, the positive phase input end of the third operational amplifier U3A is connected with the ground GND, the positive power end of the third operational amplifier U3A is connected with +5V, the negative power end of the third operational amplifier U3A is connected with-5V, the positive end of the fourth diode D4 is connected with the other end of the eighteenth resistor R18 and the other end of the ninth capacitor C9, the other end of the eleventh resistor R11 is connected with one end of the seventh resistor R7, one end of the third capacitor C3 and the inverting input end of the fourth operational amplifier U3B, the positive phase input end of the fourth operational amplifier U3B is connected with the fourteenth resistor R14, the other end of the fourteenth resistor R14 is connected with the ground GND, the output of the fourth operational amplifier U3B is connected with the other end of the seventh resistor R7, the other end of the third capacitor C3 and one end of the thirteenth resistor R13, the other end of the thirteenth resistor R13 is connected with one end of the fourth capacitor C4, one end of the fifth capacitor C5 and one end of the fifteenth resistor R15, the other end of the fifteenth resistor R15 is grounded, one end of the ninth resistor R9 is connected with the other end of the fifth capacitor C5 and the inverting input end of the first operational amplifier U4A, the positive power end of the first operational amplifier U4A is connected with +5V, the negative power end of the first operational amplifier U4A is connected with-5V, one end of the sixteenth resistor R16 is connected with the power VCC, the other end of the sixteenth resistor R16 is connected with one end of the seventeenth resistor R17, one end of the eighth capacitor C8 and the positive input end of the first operational amplifier U4A, and the other end of the seventeenth resistor R17 is connected with the ground; the other end of the fourth capacitor C4 is connected with the other end of the ninth resistor R9 and the output end of the first operational amplifier U4A and then outputs a frequency measurement signal FREQ; the other end of the twenty-first resistor R21 is connected with the inverting input end of the sixth operational amplifier U3D, the other end of the twenty-fifth resistor R25, one end of the twenty-third resistor R23 and one end of the eleventh capacitor C11, the normal phase input end of the sixth operational amplifier U3D is connected with one end of the thirty-first resistor R30, the other end of the thirty-first resistor R30 is connected with the ground, the output end of the sixth operational amplifier U3D is connected with the other end of the twenty-third resistor R23, the other end of the eleventh capacitor C11 and one end of the twenty-ninth resistor R29, the other end of the twenty-ninth resistor R29 is connected with the positive phase input of the fifth operational amplifier U3C, the negative phase input of the fifth operational amplifier U3C is connected with the active end of the adjustable resistor R19, one end of the twenty-second resistor R22 and one end of the tenth capacitor C10, the other end of the adjustable resistor R19 is connected with the ground, the output end of the twenty-sixth resistor R30 is connected with one end of the twenty-sixth resistor R26, the other end of the twenty-second resistor R22, the other end of the twenty-second resistor C10 is connected with the twenty-third end of the twenty-fifth capacitor C28, the twenty-eighth capacitor C28 is connected with the twenty-eighth end of the twenty-eighth capacitor C14, the twenty-eighth capacitor C28, and the twenty-eighth capacitor C28 is connected with the twenty-eighth end of the twenty-eighth capacitor C28, and the twenty-eighth capacitor C28, the twenty-third end of the twenty-third capacitor C28 is connected with the other end of the twenty-third capacitor C28, and the twenty-third capacitor C28, the twenty-third end of the twenty-third capacitor 13 is respectively, and the twenty-third end, the one is connected;
the receiving circuit works together with the transmitting circuit, and the sound pressure and frequency signal output end measures that the data contains known fixed sound pressure and frequency information; the measured sound pressure and frequency data are obtained by comparing the sound pressure and frequency signal output ends of the receiving circuit when the receiving circuit works independently and comparing different frequencies of the transmitting circuit when the receiving and transmitting circuits work together.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710149111.2A CN106885625B (en) | 2017-03-14 | 2017-03-14 | Ultrasonic sound pressure and frequency measuring circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710149111.2A CN106885625B (en) | 2017-03-14 | 2017-03-14 | Ultrasonic sound pressure and frequency measuring circuit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106885625A CN106885625A (en) | 2017-06-23 |
| CN106885625B true CN106885625B (en) | 2023-10-13 |
Family
ID=59181832
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710149111.2A Active CN106885625B (en) | 2017-03-14 | 2017-03-14 | Ultrasonic sound pressure and frequency measuring circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106885625B (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007292625A (en) * | 2006-04-26 | 2007-11-08 | Hitachi Kokusai Denki Engineering:Kk | Ultrasonic sound pressure measurement device |
| TW201040508A (en) * | 2009-05-06 | 2010-11-16 | Univ Nat Taiwan | Method for changing sound wave frequency by using the acoustic matching layer |
| CN103978496A (en) * | 2014-05-26 | 2014-08-13 | 国家电网公司 | Ultrasonic sensing circuit for bionic robots |
| CN104601182A (en) * | 2013-11-01 | 2015-05-06 | 成都摩宝网络科技有限公司 | Ultrasonic generator for ultrasonic near field payment |
| CN207132970U (en) * | 2017-03-14 | 2018-03-23 | 杭州电子科技大学 | Ultrasonic wave acoustic pressure and frequency measurement circuit |
-
2017
- 2017-03-14 CN CN201710149111.2A patent/CN106885625B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007292625A (en) * | 2006-04-26 | 2007-11-08 | Hitachi Kokusai Denki Engineering:Kk | Ultrasonic sound pressure measurement device |
| TW201040508A (en) * | 2009-05-06 | 2010-11-16 | Univ Nat Taiwan | Method for changing sound wave frequency by using the acoustic matching layer |
| CN104601182A (en) * | 2013-11-01 | 2015-05-06 | 成都摩宝网络科技有限公司 | Ultrasonic generator for ultrasonic near field payment |
| CN103978496A (en) * | 2014-05-26 | 2014-08-13 | 国家电网公司 | Ultrasonic sensing circuit for bionic robots |
| CN207132970U (en) * | 2017-03-14 | 2018-03-23 | 杭州电子科技大学 | Ultrasonic wave acoustic pressure and frequency measurement circuit |
Non-Patent Citations (1)
| Title |
|---|
| 叶国祥 等.压差法测量超声波声强.南京工业大学学报.2007,第第29卷卷(第第29卷期),51-53. * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106885625A (en) | 2017-06-23 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105391345B (en) | A kind of piezoelectric generator fluid dynamic sound source excitation method | |
| CN106140592A (en) | Digital ultrasonic generator and auto frequency locking method thereof | |
| CN103604189A (en) | Separately excited ultrasonic atomization control circuit | |
| CN104252146B (en) | The driving method and device of a kind of ultrasonic transducer | |
| CN209176642U (en) | A kind of windscreen supersonic dust removal device | |
| CN106885625B (en) | Ultrasonic sound pressure and frequency measuring circuit | |
| CN101372066A (en) | Piezoelectric type ultrasonic transducer driving power | |
| CN207132970U (en) | Ultrasonic wave acoustic pressure and frequency measurement circuit | |
| CN105471319B (en) | A kind of air-flow cause sound piezo-electric generating forced vibration device | |
| CN100447576C (en) | Driver of resonant transducer and signal collector | |
| CN105932906A (en) | Piezoelectric energy collector and manufacturing method therefor | |
| CN207234695U (en) | A kind of rotary piezoelectric energy accumulator | |
| CN105537091A (en) | Infrasonic wave synthetic method and device based on heterodyne frequency type and parametric acoustic array technology | |
| CN110112952A (en) | A kind of high-power dual-frequency ultrasonic wave vibratory impulse power supply with fixed skew | |
| CN105281601B (en) | The rotary generation cylinder energized for pneumatic system Internet of things node | |
| CN208562850U (en) | A kind of portable ultraphonic washer | |
| TWI514991B (en) | Pocket size ultrasonic temperature analyzer and measuring method thereof | |
| Hu et al. | Driver Power Design of Piezoelectric Vibrator Based on Single Phase Bridge Monopole SPWM Technology | |
| CN207070311U (en) | A kind of circuit for increasing ultrasonic echo amplitude | |
| CN204768634U (en) | Ultrasonic wave catalyzing gas liquid reaction ware | |
| CN2303616Y (en) | Supersonic transmission head | |
| CN215812546U (en) | Frequency sweep driving circuit for detecting bonding strength of chemical embedded steel bar | |
| CN116359334A (en) | Preparation method and device of gas-sensitive sensing film on surface of surface acoustic wave delay line | |
| CN211839190U (en) | Dust removal cleaning device for instruments and meters | |
| CN201378267Y (en) | Multifunctional embedded control panel of ultrasonic pulse scale-preventing and scale-removing device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |