CN114476082B - High-precision ultrasonic icing detection driving circuit - Google Patents
High-precision ultrasonic icing detection driving circuit Download PDFInfo
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- CN114476082B CN114476082B CN202111612295.4A CN202111612295A CN114476082B CN 114476082 B CN114476082 B CN 114476082B CN 202111612295 A CN202111612295 A CN 202111612295A CN 114476082 B CN114476082 B CN 114476082B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B64—AIRCRAFT; AVIATION; COSMONAUTICS
- B64D—EQUIPMENT FOR FITTING IN OR TO AIRCRAFT; FLIGHT SUITS; PARACHUTES; ARRANGEMENTS OR MOUNTING OF POWER PLANTS OR PROPULSION TRANSMISSIONS IN AIRCRAFT
- B64D15/00—De-icing or preventing icing on exterior surfaces of aircraft
- B64D15/20—Means for detecting icing or initiating de-icing
Abstract
The invention belongs to the technical field of electronic circuits, and discloses a high-precision ultrasonic icing detection driving circuit which comprises a square wave control circuit, an ultrasonic transmitting circuit, an ultrasonic isolating circuit, an ultrasonic amplifying circuit, a DSP, an ultrasonic transducer and an AD conversion chip. The TTL circuit directly sent by the DSP is amplified by the square wave control circuit and then excites the transmitting circuit to generate high-voltage narrow pulses, feedback signals generated after the pulses excite the ultrasonic transducer are amplified by the amplifying circuit after being protected by the isolating circuit, and the feedback signals are collected by the AD collecting module; the choice of the withstand voltage values for switching fet CS830 of 15ns and 1000V and the 20ns conduction rate of FR107 in the peripheral circuit greatly increases the amplitude of the high voltage narrow pulse width signal generated and greatly reduces its pulse width. The amplitude of the excitation pulse voltage generated by the invention can reach 300V, and the pulse width can reach 50ns. The penetrating power, the detecting power and the anti-interference power of the ultrasonic signals can be greatly improved.
Description
Technical Field
The invention belongs to the technical field of electronic circuits, and relates to a high-precision ultrasonic icing detection driving circuit.
Background
Ultrasonic waves are widely used in various detection systems, such as ultrasonic flaw detection, B-ultrasonic, ultrasonic ranging, and the like, due to their good penetrability and directivity. In modern aircraft technology, aircraft icing problems have been an important contributor to flight safety. With the development of aircraft technology, new aircraft have higher demands for speed and stealth performance, which have placed higher demands on aerodynamic profiles. Compared with the traditional icing detection sensor, the ultrasonic detection has the characteristics of wide transmission range, large monitoring area, concentrated energy and the like, and the technology has very wide research background when being used for aircraft icing. In terms of the conformal mounting of the icing detector, the ultrasonic icing detector is in principle detectable across the aircraft skin and can be mounted within the aircraft skin, a feature which would exceed all conventional icing detection sensors. The pulse width and amplitude of the high-voltage narrow pulse signal generated by the ultrasonic drive circuit directly influence the core detection capability of the ultrasonic icing detector, so that the development of the high-precision ultrasonic icing detection drive circuit is necessary.
Disclosure of Invention
The purpose of the invention is that: a high-precision ultrasonic icing detection drive circuit which can be directly controlled by a DSP is provided.
The technical scheme of the invention is as follows: a high-precision ultrasonic icing detection driving circuit is characterized in that: the device comprises a square wave control circuit, an ultrasonic wave transmitting circuit, an ultrasonic wave isolating circuit, an ultrasonic wave amplifying circuit, a DSP, an ultrasonic wave transducer and an AD conversion chip. The TTL circuit directly sent by the DSP excites the ultrasonic transmitting circuit after being amplified by the square wave control circuit to generate high-voltage narrow pulse, and a feedback signal generated after the pulse excites the ultrasonic transducer is amplified by the ultrasonic amplifying circuit after being protected by the ultrasonic isolating circuit and is collected by the AD chip collecting module;
the square wave control circuit comprises an inverter N0, a resistor R1, a potentiometer R2, a resistor R3 and a high-speed optocoupler N1. The square wave pulse signal sent by the DSP is input by 6 pins of an inverter N0, an output end 5 pin of the inverter N0 is sequentially connected with a resistor R3 and a potentiometer R2 in series, and the other end of the potentiometer R2 is connected with an input end 1 pin of a high-speed optocoupler N1. The high-speed optocoupler N1 is characterized in that the pins 2 and 5 are connected with the ground, the pin 1 of the resistor R1 is connected with the pin 7 of the high-speed optocoupler, the pin 2 of the resistor R1 is connected with the pin 8 of the high-speed optocoupler N1, the pin 8 of the high-speed optocoupler N1 is connected with VCC voltage, the pin 1 of the capacitor C1 is connected with the pin 2 of the resistor R1, and the pin 2 of the capacitor C1 is grounded.
The ultrasonic wave transmitting circuit comprises a DCDC module N2, a field effect transistor Q1, a 400K resistor R1, a pulse capacitor C1, a switching diode D2, a resistor R2 and a transducer; the pulse wave is input by 1 foot of field effect tube Q1, 28V input positive links to each other with 1 foot of DCDC module N2, 28V input negative links to each other with 10 feet of DCDC module N2, the 5 feet of DCDC module N2 links to each other with 1 foot of resistance R1, 4 feet of DCDC module N2 ground, 2 feet of resistance R1 link to each other with 2 feet of field effect tube Q1, 3 feet ground of field effect tube Q1, 1 foot of pulse capacitor C1 links to each other with 2 feet of field effect tube Q1, 2 feet of pulse capacitor C1 link to the positive pole of switching diode D2, the positive pole of switching diode D2 links to each other with the negative pole of switching diode D1, the negative pole of switching diode D2 is grounded, the positive pole of switching diode D1 connects 1 foot of resistance R2, the 2 foot of resistance R2 ground, the positive pole of transducer connects 1 foot of resistance R2, the negative pole of transducer connects 2 foot of resistance R2.
The ultrasonic isolation circuit comprises a capacitor C2, a resistor R3, a fast diode D3 and a fast diode D4; the positive pole of transducer connects 1 foot of electric capacity C2, and electric capacity C2's 2 foot links to each other with 1 foot of resistance R3, and resistance R3's 2 foot links to each other with fast diode D3's positive pole and fast diode D4's negative pole, and the negative pole of transducer links to each other with fast diode D3's negative pole, fast diode D4's positive pole and ground.
The ultrasonic amplifying circuit comprises an operational amplifier N1, an operational amplifier N2, a subtracter N3, a resistor R5, a resistor R6, a resistor R7, a resistor R17, a resistor R19, a resistor R20, a resistor R21, a resistor R22, a resistor R23, a capacitor C3, a capacitor C4, a capacitor C5, a capacitor C8 and a potentiometer R18; the input end Vin of the circuit is connected with the 1 pin of a resistor R5 and the 3 pin of an operational amplifier N1, the 2 pin and the 4 pin of the operational amplifier N1 are connected with the 2 pin and the 4 pin of the operational amplifier N2, the 8 pin of the operational amplifier N1 is connected with +5V, the 6 pin of the operational amplifier N1 and the 6 pin of the operational amplifier N2 are connected with-5V, the 5 pin of the operational amplifier N1 is short-circuited with the 7 pin and connected with the 1 pin of the resistor R6, the 2 pin of the resistor R6 is connected with the 1 pin of a capacitor C4 and the 3 pin of the operational amplifier N2, the 2 pin of the capacitor C4 is connected with the ground, the 1 pin of the operational amplifier N1 is connected with the 1 pin of a capacitor C3, the 2 pin of the operational amplifier N2 is connected with the 7 pin of a resistor R7, the 1 pin of the operational amplifier N2 is connected with the 1 pin of a capacitor C5, the 2 pin of the capacitor C5 is connected with the ground, the 2 pin of the resistor R7 is connected with the output, the 1 pin of the resistor R17 is connected with +5V, the 2 pin of the resistor R17 is connected with the 1 pin of the potentiometer R18, the 3 pin of the resistor R18 is grounded, the 2 pin of the resistor R18 is connected with the 5 pin of the subtracter N3, the 6 pin of the subtracter N3 is connected with the 7 pin of the resistor R19, the 8 pin of the subtracter N3 is +5V, the 4 pin of the subtracter N3 is-5V, the 2 pin of the resistor R19 is connected with the 2 pin of the subtracter N3 and with the 1 pin of the resistor R20, the 2 pin of the resistor R20 is connected with the 1 pin of the subtracter N3 and the 1 pin of the operational amplifier N2, the 3 pin of the subtracter N3 is connected with the 1 pin of the resistor R22 and the 1 pin of the resistor R23 and the 1 pin of the capacitor C8, and the 2 pin of the resistor R22 and the capacitor C8 are connected.
The high-speed optocoupler N1 in the square wave control circuit is GH5231, and the rising time is 20ns; the inverter N0 is specifically 54HCT04;
the DCDC module N2 in the ultrasonic wave transmitting circuit is specifically ZHDC28S300, and the field effect transistor Q1, wherein the field effect transistor Q1 is specifically CS830;
the fast diode D3 and the fast diode D4 in the ultrasonic isolation circuit are specifically 1N4148;
the resistance values in the ultrasonic amplifying circuit are specifically 100 ohm resistors R5, 100 ohm resistors R6, 49.9 ohm resistors R7, 12 Kohm resistors R17, 20K resistors R19,10K resistors R20,10 ohm resistors R21, 10 Kohm resistors R22 and 820 ohm resistors R23;
the capacitors in the ultrasonic amplifying circuit are specifically a 1uF capacitor C3, a 1pF capacitor C4, a 1pF capacitor C5 and a 1uF capacitor C8;
specific models of the computing amplifiers N1 and N2 in the ultrasonic amplifying circuit are AD603; the specific model of the operational amplifier N3 is 7F2227A.
The invention has the advantages and beneficial effects that: the invention is characterized in that when the 3.3V signal is converted into the 15V signal, a high-voltage high-speed optocoupler is adopted, so that the pulse width of the control signal is greatly reduced, and the pulse width of the high-voltage narrow pulse signal generated by the ultrasonic wave transmitting circuit is greatly reduced. Meanwhile, the isolation function of the high-speed optocoupler can also reduce the interference of a post-stage circuit on the DSP chip. The choice of the withstand voltage values for switching fet CS830 of 15ns and 1000V and the 20ns conduction rate of FR107 in the peripheral circuit greatly increases the amplitude of the high voltage narrow pulse width signal generated and greatly reduces its pulse width. The amplitude of the excitation pulse voltage generated by the invention can reach 300V, and the pulse width can reach 50ns. The penetrating power, the detecting power and the anti-interference power of the ultrasonic signals can be greatly improved.
Drawings
FIG. 1 is a cross-linking diagram of a system according to the present invention;
FIG. 2 is a circuit diagram of a square wave control circuit;
FIG. 3 is a circuit diagram of an ultrasonic emission circuit;
FIG. 4 is a circuit diagram of an ultrasonic isolation circuit;
fig. 5 is a circuit diagram of an ultrasonic amplifying circuit.
Detailed Description
The invention is further described below with reference to examples. The following description is of some, but not all embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
The invention is further described below with reference to the accompanying drawings:
as shown in FIG. 1, a high-precision ultrasonic icing detection drive circuit comprises a square wave control circuit, an ultrasonic transmitting circuit, an ultrasonic isolation circuit and an ultrasonic amplifying circuit.
As shown in fig. 2, a square wave control circuit. Because the starting voltage of the field effect transistor is 10V, the DSP can only provide 3.3V square wave signals, and the 10V square wave control signals can be generated after the amplification. The DSP provides a positive pulse signal with high level of 3.3V, low level of 0V and pulse width of 40ns, and the positive pulse signal is input into the high-voltage high-speed optocoupler after passing through the adjustable resistor, and the turn-off of the output end of the high-speed optocoupler is rapidly controlled by controlling the input current of the positive pulse signal, so that a control pulse signal with high voltage of 15V, low voltage of 0V and pulse width of 40ns is formed. The high-speed optocoupler input end of the circuit not only adopts an adjustable resistor, so that the generated pulse wave with the high voltage of 15V and the pulse width of 40ns can be adjusted not only by the DSP itself, but also by adjusting the input resistor.
As shown in fig. 3, is an ultrasonic wave transmitting circuit. The circuit adopts a field effect transistor CS830 as a switching element, and the starting voltage is 10V. The 300V high voltage is provided by a DC-DC high voltage power supply module ZHDC28S300, the power consumption of the power supply is small, the power is only 6W, and the input voltage is 28V for most airplanes in the aviation industry. The resistor R1 and the capacitor C1 form a charge-discharge circuit, R1 is a protection resistor, and the discharge current of the capacitor C1 is controlled. The emission intensity of the probe is related to the damping resistor R2, the damping is small when R2 is large, the emission intensity is large when R2 is small, and the damping is large when R2 is small. D1, D2 are fast recovery diodes FR107, which act mainly to filter out charge noise in the circuit.
As shown in fig. 4, is an ultrasonic isolation circuit. Because the ultrasonic transmitting circuit and the high-sensitivity receiving circuit are connected in parallel with the transducer, a receiving and transmitting isolation circuit is added, the high-voltage excitation pulse cannot pass through or is limited in a small range by two fast recovery voltage stabilizing diodes D3 and D4, the receiving circuit is prevented from being destroyed by the high-voltage excitation pulse, echo signals are allowed to pass through almost without attenuation, and the functions of a capacitor and a resistor are to absorb the high-voltage pulse signals. The selection of the diode is carried out when the key device in the circuit is adopted, the diode is required to ensure that the reverse withstand voltage is above 100V, and the diode can be quickly recovered. The diode ultimately selects 1N4148 as the circuit application device. The diode is a small high-frequency switch diode, the reverse withstand voltage value reaches 100V, the reverse recovery time is 4ns, and the frequency requirement of ultrasonic signals can be met.
As shown in fig. 5, an ultrasonic amplifying circuit is provided. The core operational amplifier of the design adopts an AD603 gain adjustable amplifier. AD603 has the advantage of low noise, wide frequency band, adjustable gain and gain range, and a gain value that varies linearly with the external control voltage. The gain is continuously adjustable from-11 dB to 31dB within the bandwidth range of 90MHz, so that the gain range is (20-80 dB), the circuit adopts two-stage amplification, wherein the resistor R5 is input matching impedance, the resistor R7 is output matching impedance, and the capacitors C3, C4 and C5 are filter capacitors. VG is an adjustable external control voltage, and consists of a slide rheostat R18 and a subtracter circuit, wherein the voltage is continuously adjustable between-0.5V and +0.5V, and the Gain of the amplifying circuit is adjusted by adjusting the resistance value of the slide rheostat to change the control voltage, and the Gain is Gain (dB) = (40VG+10) dB.
High accuracy ultrasonic wave icing detection drive circuit, its characterized in that: the device comprises a square wave control circuit, an ultrasonic wave transmitting circuit, an ultrasonic wave isolating circuit, an ultrasonic wave amplifying circuit, a DSP, an ultrasonic wave transducer and an AD conversion chip. The TTL circuit directly sent by the DSP is amplified by the square wave control circuit and then excites the transmitting circuit to generate high-voltage narrow pulses, feedback signals generated after the pulses excite the ultrasonic transducer are amplified by the amplifying circuit after being protected by the isolating circuit, and the feedback signals are collected by the AD collecting module;
the square wave control circuit comprises an inverter N0, a 1.5KΩ resistor R1, a 500 Ω potentiometer R2, a 300 Ω resistor R3, a high-speed optocoupler N1., wherein the high-speed optocoupler N1 is GH5231, the inverter N0 is 54HCT04, a square wave pulse signal with the amplitude of 3.3V and the pulse width of 50ns sent by a DSP is input by a 6 pin of the inverter N0, an output end 5 pin of the inverter N0 is sequentially connected with a resistor R3 and a potentiometer R2 in series, the other end of the potentiometer R2 is connected with an input end 1 pin of the high-speed optocoupler N1, 2 pins and 5 pins of the high-speed optocoupler N1 are connected with ground, 1 pin of the resistor R1 is connected with a 7 pin of the high-speed optocoupler, 2 pin of the resistor R1 is connected with an 8 pin of the high-speed optocoupler N1, 8 pin of the high-speed optocoupler N1 is connected with VCC voltage 15V-20V, 1 pin of the capacitor C1 is connected with 2 pin of the resistor R1, and 2 pin of the capacitor C1 is grounded
The ultrasonic emission circuit comprises a DCDC module N2, wherein the DCDC module N2 is a ZHDC28S300, a field effect transistor Q1, the field effect transistor Q1 is a CS830, a 400K resistor R1, a 0.1uF pulse capacitor C1, a switch diode D2, a 100 omega resistor R2, a transducer, a pulse wave with the amplitude of 15V pulse width of 50ns is input by a 1 pin of the field effect transistor CS830, a 28V input positive electrode is connected with a 1 pin of the DCDC module N2, a 28V input negative electrode is connected with a 10 pin of the DCDC module N2, a 5 pin of the DCDC module N2 is connected with a 1 pin of the resistor R1, a 4 pin of the DCDC module N2 is grounded, a 2 pin of the resistor R1 is connected with a 2 pin of the field effect transistor Q1, a 3 pin of the field effect transistor Q1 is grounded, a 1 pin of the pulse capacitor C1 is connected with a positive electrode of the switch diode D2, a 2 pin of the pulse capacitor C1 is connected with a positive electrode of the switch diode D2, a negative electrode of the switch diode D1 is connected with a 2 pin of the switch diode D1, and a 2R 2 is connected with a negative electrode of the switch 2 of the switch diode R1, a positive electrode of the switch 2 is connected with a 2R 2, and a negative electrode of the resistor R2 is connected with the 2 of the switch 2
The ultrasonic isolation circuit comprises a (1 uF capacitor C2, a 50 omega resistor R3, a fast diode D3 and a fast diode D4, wherein the fast diode D3 and the fast diode D4 are specifically 1N4148, the positive electrode of the transducer is connected with the 1 pin of the capacitor C2, the 2 pin of the capacitor C2 is connected with the 1 pin of the resistor R3, the 2 pin of the resistor R3 is connected with the positive electrode of the fast diode D3 and the negative electrode of the fast diode D4, and the negative electrode of the transducer is connected with the negative electrode of the fast diode D3, the positive electrode of the fast diode D4 and the ground.)
The ultrasonic amplifying circuit includes (operational amplifier N1, operational amplifier N2, subtractor N3, 100deg.C resistor R5, 100deg.C resistor R6, 49.9Ω resistor R7, 12KΩ resistor R17, 20Kresistor R19, 10Kresistor R20,10Ω resistor R21, 10KΩ resistor R22, 820 Ω resistor R23,1uF capacitor C3,1pF capacitor C4,1pF capacitor C5,1uF capacitor C8, 10K potentiometer R18; the specific model of the operational amplifiers N1 and N2 is AD603; the specific model of the operational amplifier N3 is 7F2227A, the input end Vin of the circuit is connected with the 1 pin of the resistor R5 and the 3 pin of the operational amplifier N1, the 2 pin and the 4 pin of the operational amplifier N1 are connected with the 2 pin and the 4 pin of the operational amplifier N2, the 8 pin of the operational amplifier N1 is connected with the +5V, the 6 pin of the operational amplifier N1 and the 6 pin of the operational amplifier N2 are connected with-5V, the 5 pin of the operational amplifier N1 is short-circuited and connected with the 1 pin of the resistor R6, the 2 pin of the resistor R6 is connected with the 1 pin of the capacitor C4 and the 3 pin of the operational amplifier N2, the 2 pin of the capacitor C4 is connected with the ground, the 5 pin of the operational amplifier N2 is connected with the 1 pin of the resistor R7, the 6 pin of the subtractor is connected with the 1 pin of the resistor R7, the 2 pin of the C1 is connected with the C1 pin of the capacitor C3, the subtractor pin of the 3 is connected with the 3 pin of the resistor R7, the 2 pin of the subtractor is connected with the 3 pin of the resistor R3, the 2 is connected with the 3 pin of the resistor R3, the resistor R18 is connected with the resistor R3, the 3 is connected with the 3 pin of the resistor R3, the resistor R18 is connected with the pin of the 3 and the resistor R18, the 2 pin of the resistor R19 is connected with the 2 pin of the subtractor N3 and is connected with the 1 pin of the resistor R20, the 2 pin of the resistor R20 is connected with the 1 pin of the subtractor N3 and the 1 pin of the resistor R21, the 2 pin of the resistor R21 is connected with the 1 pin of the operational amplifier N1 and the 1 pin of the operational amplifier N2, the 3 pin of the subtractor N3 is connected with the 1 pin of the resistor R22 and the 1 pin of the resistor R23 and the 1 pin of the capacitor C8, and the 2 pin of the resistor R22 and the 2 pin of the resistor R23 and the 2 pin of the capacitor C8 are connected. )
The square wave control circuit uses GH5231 high-speed optocoupler as a core chip, and the rising time is 20ns.
And the input end of the square wave control circuit is added with a potentiometer, so that the pulse width of the output end is controlled by controlling the current of the input end.
The ultrasonic wave transmitting circuit is powered by a DCDC module ZHDC28S300 at high voltage 300V, the power is only 6W, and the ripple wave is small.
The ultrasonic wave transmitting circuit is characterized in that a field effect tube CS830 is rapidly switched on and off to generate high-voltage narrow pulses.
The ultrasound transmission circuit filters the circuit through FR 107.
The isolation circuit is an RC isolation circuit taking a 1N4148 small-sized high-frequency fast recovery diode as a core.
The ultrasonic amplifying circuit realizes the amplification of high-frequency signals by using an AD603 gain adjustable operational amplifier.
The ultrasonic amplifying circuit is provided with a core voltage-controlled circuit which takes a 7F2227 subtracter to realize the control of the AD603 amplifying factor.
The LC filter circuit is added between the two polar amplifying circuits in the ultrasonic amplifying circuit.
The ultrasonic amplifying circuit adopts 100 omega resistor to match input impedance, and the ultrasonic amplifying circuit adopts 50 omega resistor to match output impedance.
It will be understood by those skilled in the art that, unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. It will be further understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the prior art and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein. While the foregoing is directed to embodiments of the present invention, other and further details of the invention may be had by the present invention, it should be understood that the foregoing description is merely illustrative of the present invention and that no limitations are intended to the scope of the invention, except insofar as modifications, equivalents, improvements or modifications are within the spirit and principles of the invention.
Claims (8)
1. A high-precision ultrasonic icing detection driving circuit is characterized in that: the device comprises a square wave control circuit, an ultrasonic wave transmitting circuit, an ultrasonic wave isolating circuit, an ultrasonic wave amplifying circuit, a DSP, an ultrasonic wave transducer and an AD conversion chip; the circuit directly sends TTL signals by the DSP, the TTL signals are amplified by the square wave control circuit and then excite the ultrasonic wave transmitting circuit to generate high-voltage narrow pulses, feedback signals generated after the pulses excite the ultrasonic wave transducer are amplified by the ultrasonic wave amplifying circuit after being protected by the ultrasonic wave isolating circuit, and the feedback signals are collected by the AD conversion chip; the square wave control circuit comprises an inverter N0, a resistor R1, a potentiometer R2, a resistor R3 and a high-speed optocoupler; the square wave pulse signal sent by the DSP is input by 6 pins of an inverter N0, an output end 5 pin of the inverter N0 is sequentially connected with a resistor R3 and a potentiometer R2 in series, and the other end of the potentiometer R2 is connected with an input end 1 pin of the high-speed optocoupler; the 2 pin and the 5 pin of the high-speed optical coupler are connected with the ground, the 1 pin of the resistor R1 is connected with the 7 pin of the high-speed optical coupler, the 2 pin of the resistor R1 is connected with the 8 pin of the high-speed optical coupler, the 8 pins of the high-speed optocoupler are connected with VCC voltage, the 1 pin of the capacitor C1 is connected with the 2 pins of the resistor R1, and the 2 pins of the capacitor C1 are grounded; the high-speed optocoupler is GH5231, and the inverter N0 is specifically 54HCT04.
2. The high-precision ultrasonic icing detection drive circuit according to claim 1, wherein: the ultrasonic wave transmitting circuit comprises a DCDC module, a field effect transistor Q1, a 400K resistor R1, a pulse capacitor C1, a switching diode D2, a resistor R2 and an ultrasonic transducer; the pulse wave is input by a 1 pin of a field effect tube Q1, a 28V input positive is connected with a 1 pin of a DCDC module, a 28V input negative is connected with a 10 pin of the DCDC module, a 5 pin of the DCDC module is connected with a 1 pin of a resistor R1, a 4 pin of the DCDC module is grounded, a 2 pin of a resistor R1 is connected with a 2 pin of the field effect tube Q1, a 3 pin of the field effect tube Q1 is grounded, a 1 pin of a pulse capacitor C1 is connected with a 2 pin of the field effect tube Q1, a 2 pin of the pulse capacitor C1 is connected with an anode of a switch diode D2, an anode of the switch diode D2 is connected with a cathode of the switch diode D1, a cathode of the switch diode D1 is connected with a 1 pin of a resistor R2, a 2 pin of the resistor R2 is grounded, an anode of an ultrasonic transducer is connected with a 1 pin of the resistor R2, and a cathode of the ultrasonic transducer is connected with a 2 pin of the resistor R2; the DCDC module is specifically ZHDC28S300, and the field effect transistor Q1 is specifically CS830.
3. A high-precision ultrasonic icing detection drive circuit according to claim 2, characterized in that: the ultrasonic isolation circuit comprises a capacitor C2, a resistor R3, a fast diode D3 and a fast diode D4; the positive pole of the ultrasonic transducer is connected with the 1 pin of the capacitor C2, the 2 pin of the capacitor C2 is connected with the 1 pin of the resistor R3, the 2 pin of the resistor R3 is connected with the positive pole of the fast diode D3 and the negative pole of the fast diode D4, and the negative pole of the ultrasonic transducer is connected with the negative pole of the fast diode D3, the positive pole of the fast diode D4 and the ground.
4. A high-precision ultrasonic icing detection drive circuit according to claim 3, characterized in that: the ultrasonic amplifying circuit comprises an operational amplifier N1, an operational amplifier N2, a subtracter N3, a resistor R5, a resistor R6, a resistor R7, a resistor R17, a resistor R19, a resistor R20, a resistor R21, a resistor R22, a resistor R23, a capacitor C3, a capacitor C4, a capacitor C5, a capacitor C8 and a potentiometer R18; the input end Vin of the circuit is connected with the 1 pin of a resistor R5 and the 3 pin of an operational amplifier N1, the 2 pin and the 4 pin of the operational amplifier N1 are connected with the 2 pin and the 4 pin of the operational amplifier N2, the 8 pin of the operational amplifier N1 is connected with +5V, the 6 pin of the operational amplifier N1 and the 6 pin of the operational amplifier N2 are connected with-5V, the 5 pin of the operational amplifier N1 is short-circuited with the 7 pin and connected with the 1 pin of the resistor R6, the 2 pin of the resistor R6 is connected with the 1 pin of a capacitor C4 and the 3 pin of the operational amplifier N2, the 2 pin of the capacitor C4 is connected with the ground, the 1 pin of the operational amplifier N1 is connected with the 1 pin of a capacitor C3, the 2 pin of the operational amplifier N2 is connected with the 7 pin of a resistor R7, the 1 pin of the operational amplifier N2 is connected with the 1 pin of a capacitor C5, the 2 pin of the capacitor C5 is connected with the ground, the 2 pin of the resistor R7 is connected with the output, the 1 pin of the resistor R17 is connected with +5V, the 2 pin of the resistor R17 is connected with the 1 pin of the potentiometer R18, the 3 pin of the resistor R18 is grounded, the 2 pin of the resistor R18 is connected with the 5 pin of the subtracter N3, the 6 pin of the subtracter N3 is connected with the 7 pin of the resistor R19, the 8 pin of the subtracter N3 is +5V, the 4 pin of the subtracter N3 is-5V, the 2 pin of the resistor R19 is connected with the 2 pin of the subtracter N3 and with the 1 pin of the resistor R20, the 2 pin of the resistor R20 is connected with the 1 pin of the subtracter N3 and the 1 pin of the operational amplifier N2, the 3 pin of the subtracter N3 is connected with the 1 pin of the resistor R22 and the 1 pin of the resistor R23 and the 1 pin of the capacitor C8, and the 2 pin of the resistor R22 and the capacitor C8 are connected with the 2 pin of the resistor R23 and the capacitor C8; the specific model of the operational amplifiers N1 and N2 in the acoustic wave amplifying circuit is AD603; the specific model of the subtracter N3 is 7F2227A.
5. The high-precision ultrasonic icing detection drive circuit according to claim 4, wherein: the rise time of the high-speed optocoupler in the square wave control circuit is 20ns.
6. The high-precision ultrasonic icing detection drive circuit according to claim 5, wherein: the fast diode D3 and the fast diode D4 in the ultrasonic isolation circuit are specifically 1N4148.
7. The high-precision ultrasonic icing detection drive circuit according to claim 6, wherein: the resistors in the ultrasonic amplifying circuit are specifically a 100deg.OMEGA resistor R5, a 100deg.OMEGA resistor R6, a 49.9OMEGA resistor R7, a 12KOMEGA resistor R17, a 20Kresistor R19, a 10KKresistor R20, a 10OMEGA resistor R21, a 10KOMEGA resistor R22 and a 820 OMEGA resistor R23.
8. The high-precision ultrasonic icing detection drive circuit according to claim 7, wherein: the capacitors in the ultrasonic amplifying circuit are specifically a 1uF capacitor C3, a 1pF capacitor C4, a 1pF capacitor C5 and a 1uF capacitor C8.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112498698A (en) * | 2020-12-11 | 2021-03-16 | 武汉航空仪表有限责任公司 | Excitation circuit for ultrasonic icing detection and ultrasonic icing detector |
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| US5467944A (en) * | 1992-09-08 | 1995-11-21 | Soundek Oy | Detector for indicating ice formation on the wing of an aircraft |
| CN108507507A (en) * | 2018-03-16 | 2018-09-07 | 南京航空航天大学 | A kind of method that echo type ultrasound surveys ice thickness device and its surveys ice thickness |
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| CN114476082A (en) | 2022-05-13 |
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