CN108082496B - Drive circuit of resonant icing detector - Google Patents
Drive circuit of resonant icing detector Download PDFInfo
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- CN108082496B CN108082496B CN201711177611.3A CN201711177611A CN108082496B CN 108082496 B CN108082496 B CN 108082496B CN 201711177611 A CN201711177611 A CN 201711177611A CN 108082496 B CN108082496 B CN 108082496B
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- resistor
- driving circuit
- resonant
- operational amplifier
- capacitor
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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 field of aircraft deicing design, and particularly relates to a driving circuit of a resonant icing detector. At present, a resonant icing detector forms a self-excited oscillation circuit through a driving circuit and a vibration head to enable the vibration head to work at a natural frequency, the driving circuit mainly comprises a voltage comparator, a resistor, a capacitor and the like, and the driving circuit works by supplying power of +/-15V. The invention uses a path of 5V power supply to supply power to the operational amplifier, and finely adjusts the phase of the driving circuit by adjusting the capacitance value to ensure that the whole circuit reaches phase balance. The high-frequency noise-wave filter circuit filters high-frequency noise signals by filtering through a grounding capacitor and a resistor, provides enough energy for a driving circuit through a pull-up resistor, achieves normal oscillation starting, and removes a necessary power resistor in an old driving circuit. The integrated ice detector has the advantages of simple structure, stable operation, high reliability, few electronic components, small occupied size and suitability for integration.
Description
Technical Field
The invention belongs to the field of aircraft deicing design, and particularly relates to a driving circuit of a resonant icing detector.
Background
At present, a resonant icing detector forms a self-excited oscillation circuit through a driving circuit and a vibration head to enable the vibration head to work at a natural frequency, the driving circuit mainly comprises a voltage comparator, a resistor, a capacitor and the like, and the driving circuit works through +/-15V power supply.
Disclosure of Invention
The purpose of the invention is as follows: a novel icing detector driving circuit based on 5V power supply is provided.
The technical scheme is as follows: the driving circuit of the resonant icing detector adopts operational amplifiers N1 and N2 powered by 5V, wherein
The inverting input end of an operational amplifier N1 is respectively connected with a capacitor C4 and then grounded, and is connected with a resistor R1 and then grounded, the non-inverting input end of the operational amplifier N1 is respectively connected with a capacitor C5 and then grounded, and is connected with a resistor R2 and then grounded, and is connected with a resistor R3 and a capacitor C6 in series and then connected with a 5V power supply, three paths of adjusting capacitors C1, C2 and C3 are connected in parallel between the inverting input end and the non-inverting input end of the operational amplifier N1 and are connected with a feedback coil in a resonant coil, the output end of the operational amplifier N1 is connected with the resistor R4 and then connected with the 5V power supply, is connected with the inverting input end of the operational amplifier N2 and is connected with a capacitor C7 and then divided into two paths, wherein one path is connected with the capacitor C8 and then;
the non-inverting input terminal of the operational amplifier N2 is grounded through a resistor R5, connected to a 5V power supply through a resistor R6, and connected to the output terminal of the operational amplifier N2 through a resistor R7, and the output terminal is connected to the 5V power supply through a resistor R8.
The output end of the operational amplifier N2 outputs a frequency signal generated by the vibrating head under a driving circuit.
The resistance value of the resistor R1 ranges from 27K omega to 47K omega.
The resistance of the resistor R1 is 33.2K ohms.
The sum of the capacitance values of the adjusting capacitors C1, C2 and C3 is not less than 5600 pF.
A5V power supply is used for supplying power to a voltage comparator G7J193, and the vibration head is driven to work through the voltage comparator and a plurality of peripheral resistors and capacitors. The phase of the driving circuit is finely adjusted by adjusting the capacitance value so as to enable the whole circuit to reach phase balance. The high-frequency noise-wave filter circuit filters high-frequency noise signals by filtering through a grounding capacitor and a resistor, provides enough energy for a driving circuit through a pull-up resistor, achieves normal oscillation starting, and removes a necessary power resistor in an old driving circuit.
Has the advantages that: the invention has the characteristics of using one path of 5V power supply, no need of +/-15V power supply, simple structure, stable work, high reliability, few electronic components, small occupied volume and more suitability for integrated icing detectors.
The circuit has the characteristics of few electronic components, simple circuit structure, good circuit consistency, strong anti-interference capability, wide working frequency band and small influence of environmental factors.
Drawings
Fig. 1 is a circuit schematic of the present invention.
Detailed Description
The present invention is described in further detail below. Refer to fig. 1.
(1) The driving circuit adopts a 5V power supply;
(2) an operational amplifier G7J193 is used as a main device of the circuit;
(3) the vibration head is driven to work through the operational amplifier and some peripheral resistors and capacitors;
(4) the phase of the driving circuit is finely adjusted by adjusting the capacitors C1, C2 and C3 to balance the phase of the whole circuit;
(5) filtering by a grounding capacitor and resistors R1 and R2 to filter high-frequency and clutter signals;
enough energy is provided to the driving circuit through the pull-up resistor R4 to achieve normal starting.
Claims (5)
1. A resonant mode freezes drive circuit of detector which characterized in that: the circuit employs 5V powered operational amplifiers N1 and N2, wherein
The inverting input end of an operational amplifier N1 is respectively connected with a capacitor C4 and then grounded, and is connected with a resistor R1 and then grounded, the non-inverting input end of the operational amplifier N1 is respectively connected with a capacitor C5 and then grounded, and is connected with a resistor R2 and then grounded, and is connected with a resistor R3 and a capacitor C6 in series and then connected with a 5V power supply, three paths of adjusting capacitors C1, C2 and C3 are connected in parallel between the inverting input end and the non-inverting input end of the operational amplifier N1 and are connected with a feedback coil in a resonant coil, the output end of the operational amplifier N1 is connected with the resistor R4 and then connected with the 5V power supply, is connected with the inverting input end of the operational amplifier N2 and is connected with a capacitor C7 and then divided into two paths, wherein one path is connected with the capacitor C8 and then;
the non-inverting input terminal of the operational amplifier N2 is grounded through a resistor R5, connected to a 5V power supply through a resistor R6, and connected to the output terminal of the operational amplifier N2 through a resistor R7, and the output terminal is connected to the 5V power supply through a resistor R8.
2. The drive circuit of the resonant icing detector of claim 1, wherein: the output end of the operational amplifier N2 outputs a frequency signal generated by the vibrating head under a driving circuit.
3. The drive circuit of the resonant icing detector of claim 1, wherein: the resistance value of the resistor R1 ranges from 27K omega to 47K omega.
4. The drive circuit of the resonant icing detector of claim 3, wherein: the resistance of the resistor R1 is 33.2K omega.
5. The drive circuit of the resonant icing detector of claim 1, wherein: the sum of the capacitance values of the adjusting capacitors C1, C2 and C3 is not less than 5600 pF.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711177611.3A CN108082496B (en) | 2017-11-21 | 2017-11-21 | Drive circuit of resonant icing detector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711177611.3A CN108082496B (en) | 2017-11-21 | 2017-11-21 | Drive circuit of resonant icing detector |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108082496A CN108082496A (en) | 2018-05-29 |
| CN108082496B true CN108082496B (en) | 2020-03-24 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711177611.3A Active CN108082496B (en) | 2017-11-21 | 2017-11-21 | Drive circuit of resonant icing detector |
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| Country | Link |
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| CN (1) | CN108082496B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111077819B (en) * | 2019-12-06 | 2021-06-01 | 武汉航空仪表有限责任公司 | Frequency starting circuit |
| CN112591106A (en) * | 2020-12-24 | 2021-04-02 | 太原航空仪表有限公司 | Resonant mode detector drive circuit that freezes |
| CN112896525A (en) * | 2020-12-24 | 2021-06-04 | 太原航空仪表有限公司 | Resistance type icing detector |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5140135A (en) * | 1989-09-21 | 1992-08-18 | Rosemount Inc. | Adaptive ice detector circuit |
| US6166661A (en) * | 1999-01-22 | 2000-12-26 | Rockwell Collins, Inc. | System for detecting ice on an aircraft |
| CN101234672A (en) * | 2007-01-31 | 2008-08-06 | 伊斯帕诺-絮扎公司 | Electrical supply circuit in an aircraft for electrical equipment, including a de-icing circuit |
| CN201355244Y (en) * | 2008-12-30 | 2009-12-02 | 武汉航空仪表有限责任公司 | Data acquisition circuit of ultrasonic ice melting sensor |
-
2017
- 2017-11-21 CN CN201711177611.3A patent/CN108082496B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5140135A (en) * | 1989-09-21 | 1992-08-18 | Rosemount Inc. | Adaptive ice detector circuit |
| US6166661A (en) * | 1999-01-22 | 2000-12-26 | Rockwell Collins, Inc. | System for detecting ice on an aircraft |
| CN101234672A (en) * | 2007-01-31 | 2008-08-06 | 伊斯帕诺-絮扎公司 | Electrical supply circuit in an aircraft for electrical equipment, including a de-icing circuit |
| CN201355244Y (en) * | 2008-12-30 | 2009-12-02 | 武汉航空仪表有限责任公司 | Data acquisition circuit of ultrasonic ice melting sensor |
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| Publication number | Publication date |
|---|---|
| CN108082496A (en) | 2018-05-29 |
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