CN112630470A - Ultrasonic wind speed detector adopting phase discrimination method - Google Patents

Ultrasonic wind speed detector adopting phase discrimination method Download PDF

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Publication number
CN112630470A
CN112630470A CN202110242460.5A CN202110242460A CN112630470A CN 112630470 A CN112630470 A CN 112630470A CN 202110242460 A CN202110242460 A CN 202110242460A CN 112630470 A CN112630470 A CN 112630470A
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pin
chip
resistor
capacitor
grounded
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刘冬
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Shandong Fengtu Internet Of Things Technology Co ltd
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Shandong Fengtu Internet Of Things Technology Co ltd
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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
    • G01P5/00—Measuring speed of fluids, e.g. of air stream; Measuring speed of bodies relative to fluids, e.g. of ship, of aircraft
    • G01P5/24—Measuring speed of fluids, e.g. of air stream; Measuring speed of bodies relative to fluids, e.g. of ship, of aircraft by measuring the direct influence of the streaming fluid on the properties of a detecting acoustical wave

Abstract

The application discloses a phase discrimination ultrasonic wind speed detector which comprises a digital waveform generator module, a digital signal processor module, an analog multiplier module, a power amplifier module, a signal amplifier module, a communication interface module, a transducer module and a power supply module; the transducer module includes an ultrasonic transducer A unit and an ultrasonic transducer B unit. Has the following advantages: the transducer with lower cost and lower frequency and the operational amplifier with lower cost can be used on the premise of ensuring the measurement precision, and the problems of low measurement precision, large influence of ambient temperature and the like caused by the time delay of the transducer and a signal propagation circuit can be effectively avoided.

Description

Ultrasonic wind speed detector adopting phase discrimination method
Technical Field
The invention relates to a phase discrimination ultrasonic wind speed detector, belonging to the technical field of ultrasonic application.
Background
The traditional ultrasonic wind speed and wind direction sensors are all detected by adopting a time difference method, and the precision is limited by the problems of start delay, aftershock, sensitivity of a receiving circuit, timing precision and the like of the sensors. Although the mode of increasing the ultrasonic frequency is improved, the requirements on the parameters of components and the sensitivity of the probe become very strict, and the ultrasonic frequency is greatly influenced by the application environment.
For example, patent No. CN201811411073.4 entitled ultrasonic wind speed and direction measuring device and method has the following characteristics: a program control gain amplifier connected behind the multi-path analog switch realizes the simultaneous acquisition of two clusters of signals for transmission and reception and amplifies the signals; the waveform signal processing is carried out through a band-pass filter, a detection diode and a threshold comparator, and the microcontroller carries out online evaluation and correction on the processed transmitting and receiving signals, so that the transmitting and receiving waveforms can obtain signal characteristics in the optimal collectable range, the measuring range is remarkably improved, and the precision and the disturbance resistance are improved; the microcontroller collects the waveforms of the transmitting probe and the receiving probe simultaneously, calculates the time difference of the two waveforms, and improves the precision and the disturbance resistance.
Said invention utilizes the acquisition of wave forms of transmitting probe and receiving probe to calculate time difference of two wave forms, and can raise accuracy and anti-interference capacity, but can produce measurement error due to sensitivity problem of transducer.
Disclosure of Invention
The technical problem to be solved by the invention is to provide a phase discrimination ultrasonic wind speed detector, which adopts a continuous sine wave driving and phase measurement method, uses a common intermediate frequency ultrasonic sensor probe, does not measure the time difference of the start and stop of ultrasonic waves, avoids the measurement error caused by the sensitivity of a transducer, does not need a high-precision timing chip, and can obtain higher measurement precision without a high-precision receiving and sending circuit.
In order to solve the technical problems, the invention adopts the following technical scheme:
a ultrasonic wind speed detector adopting a phase discrimination method is characterized in that: the device comprises a digital waveform generator module, a digital signal processor module, an analog multiplier module, a power amplifier module, a signal amplifier module, a communication interface module, a transducer module and a power supply module; the transducer module comprises an ultrasonic transducer A unit and an ultrasonic transducer B unit; the digital signal processor module is connected with a digital waveform generator module, an analog multiplier module and a communication interface module, the digital waveform generator module is connected with the analog multiplier module and a power amplifier module, the power amplifier module is connected with an ultrasonic transducer A unit of the transducer module, an ultrasonic transducer B unit of the transducer module is connected with the signal amplifier module, the signal amplifier module is connected with the analog multiplier module, and the power supply module supplies power to the digital waveform generator module, the digital signal processor module, the analog multiplier module, the power amplifier module, the signal amplifier module, the communication interface module and the transducer module.
Furthermore, the digital signal processor module comprises a chip U10, the model of the chip U10 is an STM32 microprocessor, a pin 1 of the chip U10 is connected with one end of a capacitor C29, the other end of the capacitor C29 is grounded, a pin 7 of the chip U10 is connected with one end of a capacitor C31 and one end of a resistor R44, the other end of the capacitor C31 is grounded, and the other end of the resistor R44 is connected with +3.3V of a power supply; a pin 13 of the chip U10 is connected with a power supply +3.3V and one end of a capacitor C32, and the other end of the capacitor C32 is grounded with a pin 12 of the chip U10; a pin 19 of the chip U10 is connected with a power supply +3.3V and one end of a capacitor C41, and the other end of the capacitor C41 is grounded with a pin 18 of the chip U10; a pin 32 of the chip U10 is connected with a power supply +3.3V and one end of a capacitor C55, and the other end of the capacitor C55 is grounded with a pin 31 of the chip U10;
the 64 pin of the chip U10 is connected with a power supply +3.3V and one end of a capacitor C30, and the other end of the capacitor C30 is grounded with the 63 pin of the chip U10; the pin 60 of the chip U10 is connected with one end of a resistor R43, the other end of the resistor R43 is grounded, the pin 48 of the chip U10 is connected with a power supply +3.3V and one end of a capacitor C39, and the other end of the capacitor C39 and the pin 47 of the chip U10 are grounded.
Furthermore, the digital waveform generator module comprises a chip U2, the model of the chip U2 is AD9833, a pin 1 of the chip U2 is connected with one end of a capacitor C2, and a pin 2 of the chip U2 and the other end of the capacitor C2 are connected with +3.3V of a power supply; a pin 3 of the chip U2 is connected with one end of a capacitor C8 and one end of a capacitor C9, and the other end of the capacitor C8 and the other end of the capacitor C9 are grounded; the 4 pin of the chip U2 is grounded, the 5 pin of the chip U2 is connected with the 3 pin of the crystal oscillator X1, the 4 pin of the crystal oscillator X1 is connected with one end of a capacitor C12 and one end of a resistor R5, the other end of the resistor R5 is connected with a power supply +3.3V, and the other end of the capacitor C12 and the 2 pin of the crystal oscillator X1 are grounded; one end of a capacitor C4, one end of a capacitor C10 of the power amplifier module and one end of a capacitor C13 of the analog multiplier module are connected to a pin 10 of the chip U2, and the other end of the capacitor C4 and a pin 9 of the chip U2 are grounded.
Furthermore, the power amplifier module comprises an operational amplifier U1A and an operational amplifier U1B, a pin 3 of the operational amplifier U1A is connected with one end of a resistor R1, a pin 4 of the operational amplifier U1A is connected with one end of a capacitor C1 and connected with a power supply of 8V, the other end of the capacitor C1 and the other end of the resistor R1 are grounded, a pin 2 of the operational amplifier U1A is connected with one end of a resistor R3 and one end of a resistor R4, the other end of the resistor R3 is connected with the other end of a capacitor C10, a pin 8 of the operational amplifier U1A is connected with one end of a capacitor C5 and connected with a power supply of + 12V; the pin 1 of the operational amplifier U1A and the other end of the resistor R4 are connected with one end of a resistor R7 and the transducer module;
the pin 7 of the operational amplifier U1B is connected with one end of a resistor R8 and the transducer module, the pin 4 of the operational amplifier U1B is connected with a power supply of-8V, the pin 5 of the operational amplifier U1B is connected with one end of a resistor R9, the other end of the resistor R9 is grounded, the pin 8 of the operational amplifier U1B is connected with the power supply of +12V, and the pin 6 of the operational amplifier U1B and the other end of the resistor R8 are connected with the other end of a resistor R7.
Further, the analog multiplier module comprises a chip U9, the model of the chip U9 is MC1496, pin 1 of the chip U9 is connected with one end of a resistor R25 and one end of a capacitor C20, pin 4 of the chip U9 is connected with one end of a resistor R28, the other end of the resistor R28 and the other end of a resistor R25 are grounded, the other end of the capacitor C20 is connected with one end of a resistor R10 and pin 1 of an operational amplifier U4A, pin 8 of the operational amplifier U4A is connected with a power supply +5V, pin 4 of the operational amplifier U4A is grounded, pin 3 of the operational amplifier U4A is connected with one end of a capacitor C14, one end of a resistor R13 and one end of a resistor R12, the other end of the capacitor C14 and the other end of a resistor R13 are grounded; the 2 pin of the operational amplifier U4A is connected with the other end of the resistor R10 and one end of the resistor R11, and the other end of the resistor R11 is connected with the other end of the capacitor C13;
the 8 pins of the chip U9 are connected with one end of a resistor R38, one end of a capacitor C24, one end of a resistor R31 and one end of a resistor R29, the other end of a resistor R31 and the other end of a capacitor C24 are grounded, the 10 pin of the chip U9 is connected with one end of the resistor R39 and the other end of a resistor R38, the other end of the resistor R39 is connected with one end of a capacitor C26, and the other end of the capacitor C26 is connected with a signal amplifier module; a pin 2 of the chip U9 is connected with one end of a resistor R41, the other end of the resistor R41 is connected with a pin 3 of the chip U9, a pin 5 of the chip U9 is connected with one end of a resistor R42, and the other end of the resistor R42 is grounded;
a pin 6 of the chip U9 is connected with one end of a resistor R33 and one end of a resistor R19, a pin 12 of the chip U9 is connected with one end of a resistor R32, the other end of the resistor R32 and the other end of the resistor R33 are connected with one end of a capacitor C21 and one end of an inductor L1, and the other end of the resistor R29 is connected in parallel; the other end of the capacitor C21 is grounded, the other end of the inductor L1 is connected with one end of a capacitor C22 and is connected with a power supply +12V, and the other end of the capacitor C22 is grounded;
the other end of the resistor R19 is connected with one end of a resistor R20 and a pin 5 of an operational amplifier U4B, a pin 4 of the operational amplifier U4B and the other end of the resistor R20 are grounded, a pin 8 of the operational amplifier U4B is connected with one end of a capacitor C16, the other end of the capacitor C16 is grounded, and the power supply +5V is connected in parallel; a pin 6 of the operational amplifier U4B is connected with one end of a resistor R18 and one end of a resistor R14, the other end of the resistor R18 is connected with one end of a resistor R16, one end of a resistor R17 and one end of a capacitor C15, the other end of the resistor R16 is connected with a power supply +12V, and the other end of the capacitor C15 and the other end of the resistor R17 are grounded; the other end of the resistor R14 and the pin 7 of the operational amplifier U4B are connected with one end of a resistor R55, the other end of the resistor R55 is connected with the pin 14 of the chip U10 and one end of a capacitor C56, and the other end of the capacitor C56 is grounded.
Furthermore, the ultrasonic transducer A unit comprises a chip U3, the model of the chip U3 is CD4052, 3 pins of the chip U3 are connected with an operational amplifier U1A of the power amplifier module, 13 pins of the chip U3 are connected with an operational amplifier U1B of the power amplifier module, 7 pins of the chip U3 are connected with one end of a capacitor C11 and one end of a resistor R6, 8 pins of the chip U3 and the other end of the capacitor C11 are grounded, and the other end of the resistor R6 is connected with a power supply-8V; the 16 pins of the chip U3 are connected with one end of a resistor R2 and one end of a capacitor C3, the other end of the capacitor C3 is grounded, and the other end of the resistor R2 is connected with a power supply + 12V;
the 1 pin of the chip U3 is connected with the 1 pin of the connector P1, the 2 pin of the chip U3 is connected with the 1 pin of the connector P4, the 4 pin of the chip U3 is connected with the 1 pin of the connector P2, and the 5 pin of the chip U3 is connected with the 1 pin of the connector P3; the 15 pin of the chip U3 is connected with the 2 pin of the connector P4, the 14 pin of the chip U3 is connected with the 2 pin of the connector P3, the 12 pin of the chip U3 is connected with the 2 pin of the connector P1, and the 11 pin of the chip U3 is connected with the 2 pin of the connector P2;
the ultrasonic transducer B unit comprises a chip U5 and a chip U8, the model of the chip U5 is CD4052, and the model of the chip U8 is CD 4504; the 3 pin of the chip U5 is grounded, the 7 pin of the chip U5 is connected with one end of a resistor R21 and one end of a capacitor C18, the other end of the capacitor C18 is grounded with the 8 pin of the chip U5, the other end of the resistor R21 is grounded, the 16 pin of the chip U5 is connected with one end of a resistor R15 and one end of a capacitor C17, the other end of the resistor R15 is connected with a power supply +12V, and the other end of the capacitor C17 is grounded;
the 1 pin of the chip U5 is connected with the 1 pin of the connector P1, the 2 pin of the chip U5 is connected with the 1 pin of the connector P4, the 4 pin of the chip U5 is connected with the 1 pin of the connector P2, and the 5 pin of the chip U5 is connected with the 1 pin of the connector P3; the 15 pin of the chip U5 is connected with the 2 pin of the connector P4, the 14 pin of the chip U5 is connected with the 2 pin of the connector P3, the 12 pin of the chip U5 is connected with the 2 pin of the connector P1, and the 11 pin of the chip U5 is connected with the 2 pin of the connector P2;
pin 1 of the chip U8 is connected with a power supply of +3.3V, pin 2 of the chip U8 is connected with pin 10 of the chip U5, and pin 3 of the chip U8 is connected with pin 56 of the chip U10; the pin 4 of the chip U8 is connected with the pin 9 of the chip U5, and the pin 5 of the chip U8 is connected with the pin 55 of the chip U10; the pin 6 of the chip U8 is connected with the pin 6 of the chip U5, the pin 7 of the chip U8 is connected with the pin 50 of the chip U10, and the pin 8 of the chip U8 is grounded;
a pin 16 of the chip U8 is connected with a power supply +12V, a pin 15 of the chip U8 is connected with a pin 6 of the chip U3, a pin 14 of the chip U8 is connected with a pin 57 of the chip U10, a pin 13 of the chip U8 is connected with a power supply +3.3V, a pin 12 of the chip U8 is connected with a pin 9 of the chip U3, and a pin 11 of the chip U8 is connected with a pin 58 of the chip U10; the 10 pin of the chip U8 is connected to the 10 pin of the chip U3, and the 9 pin of the chip U8 is connected to the 59 pin of the chip U10.
Further, the signal amplifier module comprises an operational amplifier U7A and an operational amplifier U7B, wherein a pin 4 of the operational amplifier U7B is connected with one end of a capacitor C27 and connected with a power supply of-8V, the other end of the capacitor C27 is grounded, a pin 5 of the operational amplifier U7B is connected with one end of a resistor R40, the other end of the resistor R40 is grounded, a pin 6 of the operational amplifier U7B is connected with one end of a resistor R37 and one end of a resistor R34, the other end of the resistor R37 is connected with a pin 13 of a chip U5, the other end of the resistor R34 and a pin 7 of the operational amplifier U7B are connected with one end of a capacitor C25, the other end of a capacitor C25 is connected with one end of a resistor R35, the other end of the resistor R35 is connected with one end of a pin R36 and a pin 2 of the operational amplifier U7A, a pin 8 of the operational amplifier U7A is connected with a power supply of +12V, a pin 3, the pin 1 of the operational amplifier U7A and the other end of the resistor R36 are connected with the other end of the capacitor C26 of the analog multiplier module; the 8 pin of the operational amplifier U7B is connected with one end of a capacitor C23, and the other end of the capacitor C23 is grounded.
Further, the communication interface module comprises a chip U6, the model of the chip U6 is THVD1500, pin 1 of the chip U6 is connected with one end of a resistor R50 of a digital signal processor module, the other end of the resistor R50 is connected with pin 17 of the chip U10, pin 4 of the chip U6 is connected with one end of a resistor R47 of the digital signal processor module, the other end of the resistor R47 is connected with pin 16 of the chip U10, pin 2 of the chip U6 and pin 3 of the chip U6 are connected with one end of a resistor R23 and an emitter of a triode Q1, the other end of the resistor R23 is connected with +5V, the base of the triode Q1 is connected with one end of a resistor R26 and connected with one end of a resistor R47 of the digital signal processor module, and the other end of the resistor R36;
the 8 pin of the chip U6 is connected with one end of a capacitor C19 and is connected with +5V of a power supply, the other end of a capacitor C19 is grounded, the 5 pin of the chip U6 is grounded, the 7 pin of the chip U6 is connected with one end of a resistor R22, one end of a resistor R24 and the 3 pin of a connector P5, and the other end of the resistor R22 is grounded; the other end of the resistor R24, one end of the resistor R27 and the 2 pin of the connector P5 are connected with the 6 pin of the chip U6, the other end of the resistor R27 is connected with the +5V power supply, the 1 pin of the connector J5 is connected with the power supply module, and the 4 pin of the connector J5 is grounded.
Furthermore, the power module comprises a chip U14, the model of the chip U14 is MT3608, pins 4, 5 and 6 of the chip U14 are connected with one end of a capacitor C50, one end of a capacitor C51, one end of a capacitor C52 and one end of an inductor L4, and are connected with the pin 4 of a connector J5 of the communication interface module, the other end of the capacitor C50, the other end of the capacitor C51 and the other end of the capacitor C52 are grounded, and pin 1 of the chip U14 is connected with one end of a capacitor C53, one end of a capacitor C54 and the other end of an inductor L4; the other end of the capacitor C53 and the other end of the capacitor C54 are connected with one end of an inductor L5 and one end of a diode D3, the other end of the diode D3 is connected with one end of a capacitor C47, one end of a capacitor C49, one end of a resistor R52, one end of a capacitor C46 and one end of a resistor R51, and the other ends of the capacitor C46, the capacitor C47, the other end of the capacitor C49 and the inductor L5 are grounded; the other end of the resistor R51 is connected with one end of a capacitor C38, a pin 3 of the chip U14 is connected with the other end of a resistor R52, one end of a capacitor C38, one end of a resistor R46 and one end of a diode D1, and the other end of the resistor R46 and the other end of the diode D1 are grounded;
the power supply module further comprises a chip U13, the model of the chip U13 is BL8033CB6TR, pin 1 of the chip U13 is grounded, pin 2 of the chip U13 is connected with one end of an inductor L2 and one end of a capacitor C44, the other end of the capacitor C44 is connected with pin 6 of the chip U13, the other end of the inductor L2 is connected with one end of a resistor R48 and one end of a capacitor C43, and is connected with +5V, the other end of the resistor R48 is connected with one end of a resistor R53 and pin 4 of the chip U13, the other end of the resistor R53 and the other end of the capacitor C43 are grounded, pin 3 of the chip U13 is connected with one end of a resistor R54 and one end of a capacitor C42, and is connected with +12V, the other end of.
Furthermore, the power module further comprises a chip U11, the model of the chip U11 is BL8064CB3TR33, the VIN pin of the chip U11 is connected with one end of a capacitor C33 and connected with +5V of a power supply, the VOUT pin of the chip U11 is connected with one end of a capacitor C34 and one end of a capacitor C35 and connected with +3.3V of the power supply, and the other end of the capacitor C34, the other end of the capacitor C35, the other end of the capacitor C33 and the GND pin of the chip U11 are grounded;
the power module further comprises a chip U12, the model of the chip U12 is TPS5430DDAR, a pin 1 of the chip U12 is connected with one end of a capacitor C48, the other end of the capacitor C48 is connected with a pin 8 of the chip U12, one end of a diode D2 and one end of an inductor L3, a pin 4 of the chip U12 is connected with one end of a resistor R49 and one end of a resistor R45, the other end of a resistor R49 is grounded, the other end of a resistor R45 is connected with the other end of a diode D2, one end of a capacitor C36 and one end of a capacitor C37 are connected with a power supply of-8V, the other end of an inductor L3, the other end of a capacitor C36 and the other end of a capacitor C37 are grounded, a pin 6 of the chip U37 and a pin 9 of the chip U37 are connected with one end of a capacitor C37 and the other end of a resistor R.
By adopting the technical scheme, compared with the prior art, the invention has the following technical effects:
compared with the existing wind speed detector adopting the time difference method, the wind speed detector adopting the continuous sine wave driving and the phase detection has the advantages that the use requirement on the ultrasonic transducer becomes wider, the requirement on the ultrasonic receiving and transmitting circuit is not harsh, the transducer with lower use cost and lower frequency and the operational amplifier with lower use cost can be used on the premise of ensuring the measurement precision, and a good measurement effect can be obtained under the condition of not using an intermediate frequency transformer.
Compared with the traditional TOF method for measuring the signal flight time to measure the wind speed and the wind direction, the method can effectively avoid the problems of low measurement precision, large influence of the environmental temperature and the like caused by the time delay of the energy transducer and the signal propagation circuit.
Drawings
In order to more clearly illustrate the detailed description of the invention or the technical solutions in the prior art, the drawings that are needed in the detailed description of the invention or the prior art will be briefly described below. Throughout the drawings, like elements or portions are generally identified by like reference numerals. In the drawings, elements or portions are not necessarily drawn to scale.
FIG. 1 is a schematic diagram of a digital signal processor module of the phase discrimination ultrasonic wind speed detector of the present invention;
FIG. 2 is a schematic diagram of a digital waveform generator module of the ultrasonic wind speed detector using phase discrimination method according to the present invention;
FIG. 3 is a schematic diagram of a power amplifier module of the ultrasonic wind speed detector using phase discrimination;
FIG. 4 is a schematic diagram of an analog multiplier module of the ultrasonic wind speed detector using phase discrimination;
fig. 5 to 8 are schematic diagrams of transducer modules of the phase discrimination ultrasonic wind speed detector according to the present invention;
FIG. 9 is a schematic diagram of a signal amplifier module of the ultrasonic wind speed detector using phase discrimination;
FIG. 10 is a schematic diagram of a communication interface module of the phase discrimination ultrasonic wind speed detector according to the present invention;
FIG. 11 is a schematic diagram of a 12V power output module of the phase discrimination ultrasonic wind speed detector of the present invention;
FIG. 12 is a schematic diagram of a 5V power output module of the phase discrimination ultrasonic wind speed detector of the present invention;
FIG. 13 is a schematic diagram of a 3.3V power output module of the phase discrimination ultrasonic wind speed detector of the present invention;
FIG. 14 is a schematic diagram of a-8V power output module of the phase discrimination ultrasonic wind speed detector of the present invention;
fig. 15 is an operation schematic diagram of the phase discrimination ultrasonic wind speed detector of the present invention.
Detailed Description
In embodiment 1, a phase-demodulation ultrasonic wind speed detector includes a digital waveform generator module, a digital signal processor module, an analog multiplier module, a power amplifier module, a signal amplifier module, a communication interface module, a transducer module, and a power supply module; the transducer module comprises an ultrasonic transducer A unit and an ultrasonic transducer B unit; the digital signal processor module is connected with a digital waveform generator module, an analog multiplier module and a communication interface module, the digital waveform generator module is connected with the analog multiplier module and a power amplifier module, the power amplifier module is connected with an ultrasonic transducer A unit of the transducer module, an ultrasonic transducer B unit of the transducer module is connected with the signal amplifier module, the signal amplifier module is connected with the analog multiplier module, and the power supply module supplies power to the digital waveform generator module, the digital signal processor module, the analog multiplier module, the power amplifier module, the signal amplifier module, the communication interface module and the transducer module.
As shown in fig. 1, the digital signal processor module includes a chip U10, the model of the chip U10 is an STM32 microprocessor, pin 1 of the chip U10 is connected with one end of a capacitor C29, the other end of the capacitor C29 is grounded, pin 7 of the chip U10 is connected with one end of a capacitor C31 and one end of a resistor R44, the other end of the capacitor C31 is grounded, and the other end of the resistor R44 is connected with + 3.3V; a pin 13 of the chip U10 is connected with a power supply +3.3V and one end of a capacitor C32, and the other end of the capacitor C32 is grounded with a pin 12 of the chip U10; a pin 19 of the chip U10 is connected with a power supply +3.3V and one end of a capacitor C41, and the other end of the capacitor C41 is grounded with a pin 18 of the chip U10; the 32 pin of the chip U10 is connected with a power supply of +3.3V and one end of a capacitor C55, and the other end of the capacitor C55 and the 31 pin of the chip U10 are grounded.
The 64 pin of the chip U10 is connected with a power supply +3.3V and one end of a capacitor C30, and the other end of the capacitor C30 is grounded with the 63 pin of the chip U10; the pin 60 of the chip U10 is connected with one end of a resistor R43, the other end of the resistor R43 is grounded, the pin 48 of the chip U10 is connected with a power supply +3.3V and one end of a capacitor C39, and the other end of the capacitor C39 and the pin 47 of the chip U10 are grounded.
As shown in fig. 2 and 3, the digital waveform generator module includes a chip U2, the model of the chip U2 is AD9833, pin 1 of the chip U2 is connected to one end of a capacitor C2, and pin 2 of the chip U2 and the other end of the capacitor C2 are connected to + 3.3V; a pin 3 of the chip U2 is connected with one end of a capacitor C8 and one end of a capacitor C9, and the other end of the capacitor C8 and the other end of the capacitor C9 are grounded; the 4 pin of the chip U2 is grounded, the 5 pin of the chip U2 is connected with the 3 pin of the crystal oscillator X1, the 4 pin of the crystal oscillator X1 is connected with one end of a capacitor C12 and one end of a resistor R5, the other end of the resistor R5 is connected with a power supply +3.3V, and the other end of the capacitor C12 and the 2 pin of the crystal oscillator X1 are grounded; one end of a capacitor C4, one end of a capacitor C10 of the power amplifier module and one end of a capacitor C13 of the analog multiplier module are connected to a pin 10 of the chip U2, and the other end of the capacitor C4 and a pin 9 of the chip U2 are grounded.
The power amplifier module comprises an operational amplifier U1A and an operational amplifier U1B, wherein a pin 3 of the operational amplifier U1A is connected with one end of a resistor R1, a pin 4 of the operational amplifier U1A is connected with one end of a capacitor C1 and connected with a power supply of 8V in parallel, the other end of the capacitor C1 and the other end of a resistor R1 are grounded, a pin 2 of the operational amplifier U1A is connected with one end of a resistor R3 and one end of a resistor R4, the other end of the resistor R3 is connected with the other end of a capacitor C10, a pin 8 of the operational amplifier U1A is connected with one end of a capacitor C5 and connected with a power supply; the pin 1 of the operational amplifier U1A and the other end of the resistor R4 are connected with one end of a resistor R7 and the transducer module.
The pin 7 of the operational amplifier U1B is connected with one end of a resistor R8 and the transducer module, the pin 4 of the operational amplifier U1B is connected with a power supply of-8V, the pin 5 of the operational amplifier U1B is connected with one end of a resistor R9, the other end of the resistor R9 is grounded, the pin 8 of the operational amplifier U1B is connected with the power supply of +12V, and the pin 6 of the operational amplifier U1B and the other end of the resistor R8 are connected with the other end of a resistor R7.
As shown in fig. 4, the analog multiplier module includes a chip U9, the model of the chip U9 is MC1496, pin 1 of the chip U9 is connected with one end of a resistor R25 and one end of a capacitor C20, pin 4 of the chip U9 is connected with one end of a resistor R28, the other end of the resistor R28 and the other end of a resistor R25 are grounded, the other end of the capacitor C20 is connected with one end of a resistor R10 and pin 1 of an operational amplifier U4A, pin 8 of the operational amplifier U4A is connected with a power supply +5V, pin 4 of the operational amplifier U4A is grounded, pin 3 of the operational amplifier U4A is connected with one end of a capacitor C14, one end of a resistor R13 and one end of a resistor R12, the other end of the capacitor C14 and the other end of the resistor R; the 2 pin of the operational amplifier U4A is connected with the other end of the resistor R10 and one end of the resistor R11, and the other end of the resistor R11 is connected with the other end of the capacitor C13.
The 8 pins of the chip U9 are connected with one end of a resistor R38, one end of a capacitor C24, one end of a resistor R31 and one end of a resistor R29, the other end of a resistor R31 and the other end of a capacitor C24 are grounded, the 10 pin of the chip U9 is connected with one end of the resistor R39 and the other end of a resistor R38, the other end of the resistor R39 is connected with one end of a capacitor C26, and the other end of the capacitor C26 is connected with a signal amplifier module; the 2 pin of the chip U9 is connected with one end of a resistor R41, the other end of the resistor R41 is connected with the 3 pin of the chip U9, the 5 pin of the chip U9 is connected with one end of a resistor R42, and the other end of the resistor R42 is grounded.
A pin 6 of the chip U9 is connected with one end of a resistor R33 and one end of a resistor R19, a pin 12 of the chip U9 is connected with one end of a resistor R32, the other end of the resistor R32 and the other end of the resistor R33 are connected with one end of a capacitor C21 and one end of an inductor L1, and the other end of the resistor R29 is connected in parallel; the other end of the capacitor C21 is grounded, the other end of the inductor L1 is connected with one end of a capacitor C22 and connected with a power supply +12V, and the other end of the capacitor C22 is grounded.
The other end of the resistor R19 is connected with one end of a resistor R20 and a pin 5 of an operational amplifier U4B, a pin 4 of the operational amplifier U4B and the other end of the resistor R20 are grounded, a pin 8 of the operational amplifier U4B is connected with one end of a capacitor C16, the other end of the capacitor C16 is grounded, and the power supply +5V is connected in parallel; a pin 6 of the operational amplifier U4B is connected with one end of a resistor R18 and one end of a resistor R14, the other end of the resistor R18 is connected with one end of a resistor R16, one end of a resistor R17 and one end of a capacitor C15, the other end of the resistor R16 is connected with a power supply +12V, and the other end of the capacitor C15 and the other end of the resistor R17 are grounded; the other end of the resistor R14 and the pin 7 of the operational amplifier U4B are connected with one end of a resistor R55, the other end of the resistor R55 is connected with the pin 14 of the chip U10 and one end of a capacitor C56, and the other end of the capacitor C56 is grounded.
As shown in fig. 5 to 8, the ultrasonic transducer a unit includes a chip U3, the model of the chip U3 is CD4052, pin 3 of the chip U3 is connected to an operational amplifier U1A of the power amplifier module, pin 13 of the chip U3 is connected to an operational amplifier U1B of the power amplifier module, pin 7 of the chip U3 is connected to one end of a capacitor C11 and one end of a resistor R6, pin 8 of the chip U3 and the other end of the capacitor C11 are grounded, and the other end of the resistor R6 is connected to a power supply-8V; the 16 pins of the chip U3 are connected with one end of a resistor R2 and one end of a capacitor C3, the other end of the capacitor C3 is grounded, and the other end of the resistor R2 is connected with a power supply + 12V.
The 1 pin of the chip U3 is connected with the 1 pin of the connector P1, the 2 pin of the chip U3 is connected with the 1 pin of the connector P4, the 4 pin of the chip U3 is connected with the 1 pin of the connector P2, and the 5 pin of the chip U3 is connected with the 1 pin of the connector P3; the 15 pin of the chip U3 is connected with the 2 pin of the connector P4, the 14 pin of the chip U3 is connected with the 2 pin of the connector P3, the 12 pin of the chip U3 is connected with the 2 pin of the connector P1, and the 11 pin of the chip U3 is connected with the 2 pin of the connector P2.
The ultrasonic transducer B unit comprises a chip U5 and a chip U8, the model of the chip U5 is CD4052, and the model of the chip U8 is CD 4504; the 3 feet of the chip U5 are grounded, the 7 feet of the chip U5 are connected with one end of a resistor R21 and one end of a capacitor C18, the other end of the capacitor C18 and the 8 feet of the chip U5 are grounded, the other end of a resistor R21 is grounded, the 16 feet of the chip U5 are connected with one end of a resistor R15 and one end of a capacitor C17, the other end of the resistor R15 is connected with +12V of a power supply, and the other end of the capacitor C17 is grounded.
The 1 pin of the chip U5 is connected with the 1 pin of the connector P1, the 2 pin of the chip U5 is connected with the 1 pin of the connector P4, the 4 pin of the chip U5 is connected with the 1 pin of the connector P2, and the 5 pin of the chip U5 is connected with the 1 pin of the connector P3; the 15 pin of the chip U5 is connected with the 2 pin of the connector P4, the 14 pin of the chip U5 is connected with the 2 pin of the connector P3, the 12 pin of the chip U5 is connected with the 2 pin of the connector P1, and the 11 pin of the chip U5 is connected with the 2 pin of the connector P2.
Pin 1 of the chip U8 is connected with a power supply of +3.3V, pin 2 of the chip U8 is connected with pin 10 of the chip U5, and pin 3 of the chip U8 is connected with pin 56 of the chip U10; the pin 4 of the chip U8 is connected with the pin 9 of the chip U5, and the pin 5 of the chip U8 is connected with the pin 55 of the chip U10; the pin 6 of the chip U8 is connected to the pin 6 of the chip U5, the pin 7 of the chip U8 is connected to the pin 50 of the chip U10, and the pin 8 of the chip U8 is grounded.
A pin 16 of the chip U8 is connected with a power supply +12V, a pin 15 of the chip U8 is connected with a pin 6 of the chip U3, a pin 14 of the chip U8 is connected with a pin 57 of the chip U10, a pin 13 of the chip U8 is connected with a power supply +3.3V, a pin 12 of the chip U8 is connected with a pin 9 of the chip U3, and a pin 11 of the chip U8 is connected with a pin 58 of the chip U10; the 10 pin of the chip U8 is connected to the 10 pin of the chip U3, and the 9 pin of the chip U8 is connected to the 59 pin of the chip U10.
As shown in fig. 9, the signal amplifier module includes an operational amplifier U7A and an operational amplifier U7B, a 4-pin of the operational amplifier U7B is connected to one end of a capacitor C27 and connected to-8V, the other end of the capacitor C27 is grounded, a 5-pin of the operational amplifier U7B is connected to one end of a resistor R40, the other end of the resistor R40 is grounded, a 6-pin of the operational amplifier U7B is connected to one end of a resistor R37 and one end of a resistor R34, the other end of the resistor R37 is connected to a 13-pin of a chip U5, the other end of the resistor R9 and a 7-pin of the operational amplifier U7B are connected to one end of a capacitor C25, the other end of a capacitor C25 is connected to one end of a resistor R35, the other end of the resistor R35 is connected to one end of a resistor R36-pin and a 2-pin of the operational amplifier U7A, a pin of the operational amplifier U7A is connected to +12V, a pin, the pin 1 of the operational amplifier U7A and the other end of the resistor R36 are connected with the other end of the capacitor C26 of the analog multiplier module; the 8 pin of the operational amplifier U7B is connected with one end of a capacitor C23, and the other end of the capacitor C23 is grounded.
As shown in fig. 10, the communication interface module includes a chip U6, the model of the chip U6 is THVD1500, pin 1 of the chip U6 is connected to one end of a resistor R50 of the digital signal processor module, the other end of the resistor R50 is connected to pin 17 of the chip U10, pin 4 of the chip U6 is connected to one end of a resistor R47 of the digital signal processor module, the other end of the resistor R47 is connected to pin 16 of the chip U10, pin 2 of the chip U6 and pin 3 of the chip U6 are connected to one end of a resistor R23 and an emitter of a transistor Q1, the other end of the resistor R23 is connected to +5V, a base of the transistor Q1 is connected to one end of a resistor R26 and connected to one end of a resistor R47 of the digital signal processor module, and the other end of.
The 8 pin of the chip U6 is connected with one end of a capacitor C19 and is connected with +5V of a power supply, the other end of a capacitor C19 is grounded, the 5 pin of the chip U6 is grounded, the 7 pin of the chip U6 is connected with one end of a resistor R22, one end of a resistor R24 and the 3 pin of a connector P5, and the other end of the resistor R22 is grounded; the other end of the resistor R24, one end of the resistor R27 and the 2 pin of the connector P5 are connected with the 6 pin of the chip U6, the other end of the resistor R27 is connected with the +5V power supply, the 1 pin of the connector J5 is connected with the power supply module, and the 4 pin of the connector J5 is grounded.
As shown in fig. 11, the power module includes a chip U14, the model of the chip U14 is MT3608, pins 4, 5 and 6 of the chip U14 are connected to one end of a capacitor C50, one end of a capacitor C51, one end of a capacitor C52 and one end of an inductor L4, and are connected to the pin 4 of a connector J5 of the communication interface module, the other end of the capacitor C50, the other end of the capacitor C51 and the other end of the capacitor C52 are grounded, and pin 1 of the chip U14 is connected to one end of a capacitor C53, one end of a capacitor C54 and the other end of an inductor L4; the other end of the capacitor C53 and the other end of the capacitor C54 are connected with one end of an inductor L5 and one end of a diode D3, the other end of the diode D3 is connected with one end of a capacitor C47, one end of a capacitor C49, one end of a resistor R52, one end of a capacitor C46 and one end of a resistor R51, and the other ends of the capacitor C46, the capacitor C47, the other end of the capacitor C49 and the inductor L5 are grounded; the other end of the resistor R51 is connected with one end of a capacitor C38, a pin 3 of the chip U14 is connected with the other end of a resistor R52, one end of a capacitor C38, one end of a resistor R46 and one end of a diode D1, and the other end of the resistor R46 and the other end of the diode D1 are grounded.
As shown in fig. 12, the power module further includes a chip U13, the model of the chip U13 is BL8033CB6TR, pin 1 of the chip U13 is grounded, pin 2 of the chip U13 is connected to one end of an inductor L2 and one end of a capacitor C44, the other end of the capacitor C44 is connected to pin 6 of the chip U13, the other end of the inductor L2 is connected to one end of a resistor R48 and one end of a capacitor C43, which are connected in parallel to a power supply +5V, the other end of the resistor R48 is connected to one end of a resistor R53 and pin 4 of the chip U13, the other end of the resistor R53 and the other end of the capacitor C43 are grounded, pin 3 of the chip U13 is connected to one end of a resistor R54 and one end of a capacitor C42, which are connected in parallel to.
As shown in fig. 13, the power module further includes a chip U11, the model of the chip U11 is BL8064CB3TR33, the VIN pin of the chip U11 is connected to one end of a capacitor C33 and connected to +5V, the VOUT pin of the chip U11 is connected to one end of a capacitor C34 and one end of a capacitor C35 and connected to +3.3V, and the other end of the capacitor C34, the other end of the capacitor C35, the other end of the capacitor C33 and the GND pin of the chip U11 are grounded.
As shown in fig. 14, the power module further includes a chip U12, the model of the chip U12 is TPS5430DDAR, pin 1 of the chip U12 is connected to one end of a capacitor C48, the other end of the capacitor C48 is connected to pin 8 of the chip U12, one end of a diode D2 and one end of an inductor L3, pin 4 of the chip U12 is connected to one end of a resistor R49 and one end of a resistor R45, the other end of the resistor R49 is grounded, the other end of the resistor R45 is connected to the other end of a diode D2, one end of a capacitor C36, one end of a capacitor C37 is connected to power-8V, the other end of an inductor L3, the other end of a capacitor C36 and the other end of a capacitor C37 are grounded, pin 6 of the chip U37 and pin 9 of the chip U37 are connected to one end of a capacitor C37 and the other end of a capacitor C37 are connected to power supply.
As shown in fig. 15, the digital waveform generator module is used to generate sine wave signals with specified frequency, the digital waveform generator module is controlled by the digital signal processor module through a digital interface, the power amplifier module is responsible for amplifying the sine wave signals and driving the ultrasonic transducer a in the transducer module, the ultrasonic transducer B in the transducer module is responsible for receiving the signals from the ultrasonic transducer a and converting the signals into sine wave electric signals, the signal amplifier module is responsible for amplifying weak signals to an input voltage range suitable for the analog multiplier module, the analog multiplier module has two signal sources, 1 is the sine wave signal of the digital waveform generator module, the other 1 is the output signal of the signal amplifier module, the analog multiplier module performs multiplication operation on the two signals, and the output result is digitally processed and operated after being acquired by the digital signal processor module through AD.
The working principle of the invention is as follows: after the ultrasonic wave is propagated through the air, the wavelength can be changed due to the difference of wind speed and temperature, but the received frequency can not be changed, assuming that the distance between the probes A and B is L, the frequency of the used ultrasonic wave is f, and the sound velocity at a certain moment is V, the corresponding wavelength in the air is V/f, the number of the wavelengths which can be accommodated in the distance L between the two probes is N = L/(V/f), two input signals of the analog multiplier are respectively an initial signal before transmission and a received signal propagated through the air, a phase difference exists between the two signals, the frequency of the signal is doubled after passing through the analog multiplier, and a certain direct current component exists due to the difference of the phase, the corresponding wavelength can also be changed when the flow rate of the air is changed, and the direct current component output by the analog multiplier can also be changed, the wind speed can then be detected by the digital processor. Since the ultrasonic wave wavelength will be less than 2CM in a general environment, when the distance of the A, B probe is N times the wavelength, a small wind speed change will bring about N times the phase change, so that a breeze can be easily detected.
The method uses continuous sine wave drive, so that the problems of sensitivity, frequency response and aftershock caused by a transducer or a hardware amplifier are avoided. And the life of the transducer will be longer.
The description of the present invention has been presented for purposes of illustration and description, and is not intended to be exhaustive or limited to the invention in the form disclosed. Many modifications and variations will be apparent to practitioners skilled in this art. The embodiment was chosen and described in order to best explain the principles of the invention and the practical application, and to enable others of ordinary skill in the art to understand the invention for various embodiments with various modifications as are suited to the particular use contemplated.

Claims (10)

1. A ultrasonic wind speed detector adopting a phase discrimination method is characterized in that: the device comprises a digital waveform generator module, a digital signal processor module, an analog multiplier module, a power amplifier module, a signal amplifier module, a communication interface module, a transducer module and a power supply module; the transducer module comprises an ultrasonic transducer A unit and an ultrasonic transducer B unit; the digital signal processor module is connected with a digital waveform generator module, an analog multiplier module and a communication interface module, the digital waveform generator module is connected with the analog multiplier module and a power amplifier module, the power amplifier module is connected with an ultrasonic transducer A unit of the transducer module, an ultrasonic transducer B unit of the transducer module is connected with a signal amplifier module, the signal amplifier module is connected with the analog multiplier module, and a power supply module supplies power to the digital waveform generator module, the digital signal processor module, the analog multiplier module, the power amplifier module, the signal amplifier module, the communication interface module and the transducer module;
the digital signal processor module comprises a chip U10, the model of the chip U10 is an STM32 microprocessor, a 64 pin of the chip U10 is connected with a power supply +3.3V and one end of a capacitor C30, and the other end of the capacitor C30 is grounded with a 63 pin of a chip U10; the pin 60 of the chip U10 is connected with one end of a resistor R43, the other end of the resistor R43 is grounded, the pin 48 of the chip U10 is connected with a power supply +3.3V and one end of a capacitor C39, and the other end of the capacitor C39 and the pin 47 of the chip U10 are grounded.
2. The phase-discrimination ultrasonic wind speed detector according to claim 1, characterized in that: a pin 1 of the chip U10 is connected with one end of a capacitor C29, the other end of the capacitor C29 is grounded, a pin 7 of the chip U10 is connected with one end of a capacitor C31 and one end of a resistor R44, the other end of the capacitor C31 is grounded, and the other end of the resistor R44 is connected with a power supply + 3.3V; a pin 13 of the chip U10 is connected with a power supply +3.3V and one end of a capacitor C32, and the other end of the capacitor C32 is grounded with a pin 12 of the chip U10; a pin 19 of the chip U10 is connected with a power supply +3.3V and one end of a capacitor C41, and the other end of the capacitor C41 is grounded with a pin 18 of the chip U10; the 32 pin of the chip U10 is connected with a power supply of +3.3V and one end of a capacitor C55, and the other end of the capacitor C55 and the 31 pin of the chip U10 are grounded.
3. The phase-discrimination ultrasonic wind speed detector according to claim 1, characterized in that: the digital waveform generator module comprises a chip U2, the model of the chip U2 is AD9833, a pin 1 of the chip U2 is connected with one end of a capacitor C2, and a pin 2 of the chip U2 and the other end of the capacitor C2 are connected with a power supply of + 3.3V; a pin 3 of the chip U2 is connected with one end of a capacitor C8 and one end of a capacitor C9, and the other end of the capacitor C8 and the other end of the capacitor C9 are grounded; the 4 pin of the chip U2 is grounded, the 5 pin of the chip U2 is connected with the 3 pin of the crystal oscillator X1, the 4 pin of the crystal oscillator X1 is connected with one end of a capacitor C12 and one end of a resistor R5, the other end of the resistor R5 is connected with a power supply +3.3V, and the other end of the capacitor C12 and the 2 pin of the crystal oscillator X1 are grounded; one end of a capacitor C4, one end of a capacitor C10 of the power amplifier module and one end of a capacitor C13 of the analog multiplier module are connected to a pin 10 of the chip U2, and the other end of the capacitor C4 and a pin 9 of the chip U2 are grounded.
4. The phase-discrimination ultrasonic wind speed detector according to claim 1, characterized in that: the power amplifier module comprises an operational amplifier U1A and an operational amplifier U1B, wherein a pin 3 of the operational amplifier U1A is connected with one end of a resistor R1, a pin 4 of the operational amplifier U1A is connected with one end of a capacitor C1 and connected with a power supply of 8V in parallel, the other end of the capacitor C1 and the other end of a resistor R1 are grounded, a pin 2 of the operational amplifier U1A is connected with one end of a resistor R3 and one end of a resistor R4, the other end of the resistor R3 is connected with the other end of a capacitor C10, a pin 8 of the operational amplifier U1A is connected with one end of a capacitor C5 and connected with a power supply; the pin 1 of the operational amplifier U1A and the other end of the resistor R4 are connected with one end of a resistor R7 and the transducer module;
the pin 7 of the operational amplifier U1B is connected with one end of a resistor R8 and the transducer module, the pin 4 of the operational amplifier U1B is connected with a power supply of-8V, the pin 5 of the operational amplifier U1B is connected with one end of a resistor R9, the other end of the resistor R9 is grounded, the pin 8 of the operational amplifier U1B is connected with the power supply of +12V, and the pin 6 of the operational amplifier U1B and the other end of the resistor R8 are connected with the other end of a resistor R7.
5. The phase-discrimination ultrasonic wind speed detector according to claim 1, characterized in that: the analog multiplier module comprises a chip U9, the model of the chip U9 is MC1496, a pin 1 of the chip U9 is connected with one end of a resistor R25 and one end of a capacitor C20, a pin 4 of the chip U9 is connected with one end of a resistor R28, the other end of the resistor R28 and the other end of a resistor R25 are grounded, the other end of the capacitor C20 is connected with one end of a resistor R10 and a pin 1 of an operational amplifier U4A, a pin 8 of the operational amplifier U4A is connected with a power supply +5V, a pin 4 of the operational amplifier U4A is grounded, a pin 3 of the operational amplifier U4A is connected with one end of a capacitor C14, one end of a resistor R13 and one end of a resistor R12, the other end of the capacitor C14 and the other end of; the 2 pin of the operational amplifier U4A is connected with the other end of the resistor R10 and one end of the resistor R11, and the other end of the resistor R11 is connected with the other end of the capacitor C13;
the 8 pins of the chip U9 are connected with one end of a resistor R38, one end of a capacitor C24, one end of a resistor R31 and one end of a resistor R29, the other end of a resistor R31 and the other end of a capacitor C24 are grounded, the 10 pin of the chip U9 is connected with one end of the resistor R39 and the other end of a resistor R38, the other end of the resistor R39 is connected with one end of a capacitor C26, and the other end of the capacitor C26 is connected with a signal amplifier module; a pin 2 of the chip U9 is connected with one end of a resistor R41, the other end of the resistor R41 is connected with a pin 3 of the chip U9, a pin 5 of the chip U9 is connected with one end of a resistor R42, and the other end of the resistor R42 is grounded;
a pin 6 of the chip U9 is connected with one end of a resistor R33 and one end of a resistor R19, a pin 12 of the chip U9 is connected with one end of a resistor R32, the other end of the resistor R32 and the other end of the resistor R33 are connected with one end of a capacitor C21 and one end of an inductor L1, and the other end of the resistor R29 is connected in parallel; the other end of the capacitor C21 is grounded, the other end of the inductor L1 is connected with one end of a capacitor C22 and is connected with a power supply +12V, and the other end of the capacitor C22 is grounded;
the other end of the resistor R19 is connected with one end of a resistor R20 and a pin 5 of an operational amplifier U4B, a pin 4 of the operational amplifier U4B and the other end of the resistor R20 are grounded, a pin 8 of the operational amplifier U4B is connected with one end of a capacitor C16, the other end of the capacitor C16 is grounded, and the power supply +5V is connected in parallel; a pin 6 of the operational amplifier U4B is connected with one end of a resistor R18 and one end of a resistor R14, the other end of the resistor R18 is connected with one end of a resistor R16, one end of a resistor R17 and one end of a capacitor C15, the other end of the resistor R16 is connected with a power supply +12V, and the other end of the capacitor C15 and the other end of the resistor R17 are grounded; the other end of the resistor R14 and the pin 7 of the operational amplifier U4B are connected with one end of a resistor R55, the other end of the resistor R55 is connected with the pin 14 of the chip U10 and one end of a capacitor C56, and the other end of the capacitor C56 is grounded.
6. The phase-discrimination ultrasonic wind speed detector according to claim 1, characterized in that: the ultrasonic transducer A unit comprises a chip U3, the model of the chip U3 is CD4052, 3 pins of the chip U3 are connected with an operational amplifier U1A of a power amplifier module, 13 pins of the chip U3 are connected with an operational amplifier U1B of the power amplifier module, 7 pins of the chip U3 are connected with one end of a capacitor C11 and one end of a resistor R6, 8 pins of the chip U3 and the other end of the capacitor C11 are grounded, and the other end of the resistor R6 is connected with a power supply-8V; the 16 pins of the chip U3 are connected with one end of a resistor R2 and one end of a capacitor C3, the other end of the capacitor C3 is grounded, and the other end of the resistor R2 is connected with a power supply + 12V;
the 1 pin of the chip U3 is connected with the 1 pin of the connector P1, the 2 pin of the chip U3 is connected with the 1 pin of the connector P4, the 4 pin of the chip U3 is connected with the 1 pin of the connector P2, and the 5 pin of the chip U3 is connected with the 1 pin of the connector P3; the 15 pin of the chip U3 is connected with the 2 pin of the connector P4, the 14 pin of the chip U3 is connected with the 2 pin of the connector P3, the 12 pin of the chip U3 is connected with the 2 pin of the connector P1, and the 11 pin of the chip U3 is connected with the 2 pin of the connector P2;
the ultrasonic transducer B unit comprises a chip U5 and a chip U8, the model of the chip U5 is CD4052, and the model of the chip U8 is CD 4504; the 3 pin of the chip U5 is grounded, the 7 pin of the chip U5 is connected with one end of a resistor R21 and one end of a capacitor C18, the other end of the capacitor C18 is grounded with the 8 pin of the chip U5, the other end of the resistor R21 is grounded, the 16 pin of the chip U5 is connected with one end of a resistor R15 and one end of a capacitor C17, the other end of the resistor R15 is connected with a power supply +12V, and the other end of the capacitor C17 is grounded;
the 1 pin of the chip U5 is connected with the 1 pin of the connector P1, the 2 pin of the chip U5 is connected with the 1 pin of the connector P4, the 4 pin of the chip U5 is connected with the 1 pin of the connector P2, and the 5 pin of the chip U5 is connected with the 1 pin of the connector P3; the 15 pin of the chip U5 is connected with the 2 pin of the connector P4, the 14 pin of the chip U5 is connected with the 2 pin of the connector P3, the 12 pin of the chip U5 is connected with the 2 pin of the connector P1, and the 11 pin of the chip U5 is connected with the 2 pin of the connector P2;
pin 1 of the chip U8 is connected with a power supply of +3.3V, pin 2 of the chip U8 is connected with pin 10 of the chip U5, and pin 3 of the chip U8 is connected with pin 56 of the chip U10; the pin 4 of the chip U8 is connected with the pin 9 of the chip U5, and the pin 5 of the chip U8 is connected with the pin 55 of the chip U10; the pin 6 of the chip U8 is connected with the pin 6 of the chip U5, the pin 7 of the chip U8 is connected with the pin 50 of the chip U10, and the pin 8 of the chip U8 is grounded;
a pin 16 of the chip U8 is connected with a power supply +12V, a pin 15 of the chip U8 is connected with a pin 6 of the chip U3, a pin 14 of the chip U8 is connected with a pin 57 of the chip U10, a pin 13 of the chip U8 is connected with a power supply +3.3V, a pin 12 of the chip U8 is connected with a pin 9 of the chip U3, and a pin 11 of the chip U8 is connected with a pin 58 of the chip U10; the 10 pin of the chip U8 is connected to the 10 pin of the chip U3, and the 9 pin of the chip U8 is connected to the 59 pin of the chip U10.
7. The phase-discrimination ultrasonic wind speed detector according to claim 1, characterized in that: the signal amplifier module comprises an operational amplifier U7A and an operational amplifier U7B, wherein a pin 4 of the operational amplifier U7B is connected with one end of a capacitor C27 and connected with a power supply of-8V in parallel, the other end of the capacitor C27 is grounded, a pin 5 of the operational amplifier U7B is connected with one end of a resistor R40, the other end of a resistor R40 is grounded, a pin 6 of the operational amplifier U7B is connected with one end of a resistor R37 and one end of a resistor R34, the other end of the resistor R37 is connected with a pin 13 of a chip U5, the other end of the resistor R5 and a pin 7 of the operational amplifier U7 5 are connected with one end of a capacitor C5, the other end of the capacitor C5 is connected with one end of a resistor R5, the other end of the resistor R5 is connected with one end of a pin 2 of the operational amplifier U7 5, a pin 8 of the operational amplifier U7 5 is connected with a power supply of +12V in parallel, a pin 3 of the operational amplifier U7 5 is connected with one end of a resistor R5, the other end of the (ii) a The 8 pin of the operational amplifier U7B is connected with one end of a capacitor C23, and the other end of the capacitor C23 is grounded.
8. The phase-discrimination ultrasonic wind speed detector according to claim 1, characterized in that: the communication interface module comprises a chip U6, the model of the chip U6 is THVD1500, a pin 1 of the chip U6 is connected with one end of a resistor R50 of a digital signal processor module, the other end of the resistor R50 is connected with a pin 17 of the chip U10, a pin 4 of the chip U6 is connected with one end of a resistor R47 of the digital signal processor module, the other end of the resistor R47 is connected with a pin 16 of the chip U10, a pin 2 of the chip U6 and a pin 3 of the chip U6 are connected with one end of a resistor R23 and an emitter of a triode Q1, the other end of the resistor R23 is connected with +5V of a power supply, the base of the triode Q1 is connected with one end of a resistor R26 and one end of a resistor R47 of the digital signal processor module;
the 8 pin of the chip U6 is connected with one end of a capacitor C19 and is connected with +5V of a power supply, the other end of a capacitor C19 is grounded, the 5 pin of the chip U6 is grounded, the 7 pin of the chip U6 is connected with one end of a resistor R22, one end of a resistor R24 and the 3 pin of a connector P5, and the other end of the resistor R22 is grounded; the other end of the resistor R24, one end of the resistor R27 and the pin 2 of the connector P5 are connected to the pin 6 of the chip U6, the other end of the resistor R27 is connected with +5V of a power supply, the pin 1 of the connector J5 is connected with a power supply module, and the pin 4 of the connector J5 is grounded.
9. The phase-discrimination ultrasonic wind speed detector according to claim 1, characterized in that: the power module comprises a chip U14, the model of the chip U14 is MT3608, the 4, 5 and 6 pins of the chip U14 are connected with one end of a capacitor C50, one end of a capacitor C51, one end of a capacitor C52 and one end of an inductor L4, and are connected with the 4 pins of a communication interface module connector J5, the other end of the capacitor C50, the other end of the capacitor C51 and the other end of the capacitor C52 are grounded, and the 1 pin of the chip U14 is connected with one end of a capacitor C53, one end of a capacitor C54 and the other end of an inductor L4; the other end of the capacitor C53 and the other end of the capacitor C54 are connected with one end of an inductor L5 and one end of a diode D3, the other end of the diode D3 is connected with one end of a capacitor C47, one end of a capacitor C49, one end of a resistor R52, one end of a capacitor C46 and one end of a resistor R51, and the other ends of the capacitor C46, the capacitor C47, the other end of the capacitor C49 and the inductor L5 are grounded; the other end of the resistor R51 is connected with one end of a capacitor C38, a pin 3 of the chip U14 is connected with the other end of a resistor R52, one end of a capacitor C38, one end of a resistor R46 and one end of a diode D1, and the other end of the resistor R46 and the other end of the diode D1 are grounded;
the power supply module further comprises a chip U13, the model of the chip U13 is BL8033CB6TR, pin 1 of the chip U13 is grounded, pin 2 of the chip U13 is connected with one end of an inductor L2 and one end of a capacitor C44, the other end of the capacitor C44 is connected with pin 6 of the chip U13, the other end of the inductor L2 is connected with one end of a resistor R48 and one end of a capacitor C43, and is connected with +5V, the other end of the resistor R48 is connected with one end of a resistor R53 and pin 4 of the chip U13, the other end of the resistor R53 and the other end of the capacitor C43 are grounded, pin 3 of the chip U13 is connected with one end of a resistor R54 and one end of a capacitor C42, and is connected with +12V, the other end of.
10. The phase-discrimination ultrasonic wind speed detector according to claim 9, wherein: the power supply module further comprises a chip U11, the model of the chip U11 is BL8064CB3TR33, the VIN pin of the chip U11 is connected with one end of a capacitor C33 and connected with +5V of a power supply, the VOUT pin of the chip U11 is connected with one end of a capacitor C34 and one end of a capacitor C35 and connected with +3.3V of the power supply, and the other end of the capacitor C34, the other end of a capacitor C35, the other end of the capacitor C33 and the GND pin of the chip U11 are grounded;
the power module further comprises a chip U12, the model of the chip U12 is TPS5430DDAR, a pin 1 of the chip U12 is connected with one end of a capacitor C48, the other end of the capacitor C48 is connected with a pin 8 of the chip U12, one end of a diode D2 and one end of an inductor L3, a pin 4 of the chip U12 is connected with one end of a resistor R49 and one end of a resistor R45, the other end of a resistor R49 is grounded, the other end of a resistor R45 is connected with the other end of a diode D2, one end of a capacitor C36 and one end of a capacitor C37 are connected with a power supply of-8V, the other end of an inductor L3, the other end of a capacitor C36 and the other end of a capacitor C37 are grounded, a pin 6 of the chip U37 and a pin 9 of the chip U37 are connected with one end of a capacitor C37 and the other end of a resistor R.
CN202110242460.5A 2021-03-05 2021-03-05 Ultrasonic wind speed detector adopting phase discrimination method Pending CN112630470A (en)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4922750A (en) * 1986-09-30 1990-05-08 Siemens Aktiengesellschaft Ultrasound phase difference method for measuring high flow rates
CN106771347A (en) * 2016-12-30 2017-05-31 内蒙古工业大学 A kind of frequency sweep type ultrasonic wind measurement method
CN107290564A (en) * 2017-07-28 2017-10-24 电子科技大学 A kind of ultrasonic flow-velocity measuring method based on phase difference
CN108489562A (en) * 2018-02-09 2018-09-04 杭州软库科技有限公司 A kind of water pipe flow rate detection water meter system and method based on ultrasonic resonance
CN111380597A (en) * 2018-12-27 2020-07-07 上海华虹计通智能系统股份有限公司 Flow abnormity detection method and circuit of phase difference type ultrasonic flowmeter

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4922750A (en) * 1986-09-30 1990-05-08 Siemens Aktiengesellschaft Ultrasound phase difference method for measuring high flow rates
CN106771347A (en) * 2016-12-30 2017-05-31 内蒙古工业大学 A kind of frequency sweep type ultrasonic wind measurement method
CN107290564A (en) * 2017-07-28 2017-10-24 电子科技大学 A kind of ultrasonic flow-velocity measuring method based on phase difference
CN108489562A (en) * 2018-02-09 2018-09-04 杭州软库科技有限公司 A kind of water pipe flow rate detection water meter system and method based on ultrasonic resonance
CN111380597A (en) * 2018-12-27 2020-07-07 上海华虹计通智能系统股份有限公司 Flow abnormity detection method and circuit of phase difference type ultrasonic flowmeter

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