CN111121950A - Non-contact frequency detection device - Google Patents
Non-contact frequency detection device Download PDFInfo
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- CN111121950A CN111121950A CN201911248403.7A CN201911248403A CN111121950A CN 111121950 A CN111121950 A CN 111121950A CN 201911248403 A CN201911248403 A CN 201911248403A CN 111121950 A CN111121950 A CN 111121950A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01H—MEASUREMENT OF MECHANICAL VIBRATIONS OR ULTRASONIC, SONIC OR INFRASONIC WAVES
- G01H11/00—Measuring mechanical vibrations or ultrasonic, sonic or infrasonic waves by detecting changes in electric or magnetic properties
- G01H11/06—Measuring mechanical vibrations or ultrasonic, sonic or infrasonic waves by detecting changes in electric or magnetic properties by electric means
Abstract
The invention belongs to the technical field of frequency detection of resonant icing detectors, and relates to a non-contact frequency detection device for a resonant icing detector, which comprises a detection coil (1), a passive signal amplification module (2), a connecting circuit (3), a signal acquisition module (4), a signal processing module (5), a display module (6) and a power supply module (7); the device converts the resonance frequency of the resonant icing detector probe into periodic voltage signals with the same frequency through electric field induction by utilizing the electric field signal induction characteristic of the detection coil (1). Amplify the voltage signal amplitude through passive signal amplification module (2) and be convenient for detect to through interconnecting link (3) with signal transmission to signal acquisition module (4), turn into frequency signal and transmit to display module (6) display frequency numerical value with periodic voltage signal by signal processing module (5).
Description
Technical Field
The invention belongs to the technical field of frequency detection of resonant icing detectors, and relates to a non-contact frequency detection device.
Background
The resonance type icing detector is used as a mainstream icing sensor of the current airplane equipment, and the icing condition of the environment where the airplane is located is represented by the change of the resonance frequency of the extended probe. In order to judge whether the resonant frequency point of the resonant icing detector is in a qualified range, online inspection is needed in an installed state, and judgment is carried out by detecting the resonant frequency of a probe extending out of the resonant icing detector. However, the contact-type measuring device affects the detection result, and the optical non-contact-type detecting device is not suitable for the inspection of the installation state due to installation and requirements on the detection environment, so that a portable non-contact-type frequency detecting device for the resonance-type icing detector is needed.
Disclosure of Invention
The purpose of the invention is: a non-contact frequency detection device is provided for detecting the resonant frequency of a probe extending out of a resonant icing probe.
The technical scheme of the invention is as follows: a non-contact frequency detection device comprises a detection coil 1, a connection circuit 3, a signal acquisition module 4, a signal processing module 5, a display module 6 and a power supply module 7; commercial power voltage passes through behind the power module 7 processing and the commercial power disconnection, continuously give signal acquisition module 4, signal processing module 5, display module 6 supplies power, detect the probe resonant frequency that coil 1 response resonant mode icing detector stretches out and convert voltage signal into, transmit for signal acquisition module 4 through interconnecting link 3, handle the signal and transmit for signal processing module 5 by signal acquisition module 4, signal processing module 5 becomes the frequency digit with voltage signal processing and transmits for display module 6, show the frequency that detects to the operator by display module 6.
And a passive signal amplification module 2 is added behind the detection coil 1.
The passive signal amplification module 2 can amplify the voltage amplitude under the condition of keeping the voltage frequency unchanged, so that the anti-interference capacity of signals is improved, and the signal acquisition module 4 at the rear end is convenient for acquiring signals.
And the connecting line 3 transmits the voltage signal processed by the passive signal amplification module 2 to the signal acquisition module 4.
The signal acquisition module 4 continuously acquires periodic voltage signals, filters noise signals, only retains the required periodic voltage signals, and transmits the periodic voltage signals to the signal processing module 5.
The signal processing module 5 processes the periodic voltage signal into a frequency signal through analog-to-digital conversion, reads the frequency signal frequency and transmits the frequency signal to the display module 6.
And the display module 6 receives the frequency value display signal provided by the signal processing module 5 and visually displays the currently detected frequency value for an operator.
The power supply device 7 comprises a power transformation component and a rechargeable battery and provides portable power supply for the frequency detection device; the power transformation component converts a power supply provided by the outside, such as commercial power, into a charging power supply required by the rechargeable battery, and the rechargeable battery realizes the energy storage function and provides portable power supply for the detection device under the condition of being separated from the external power supply.
The non-contact frequency detection device utilizes the resonance characteristic of a probe of the resonance type icing detector, generates an induction signal in the detection coil 1 through the interaction with the detection coil 1, processes the induction signal into a digital frequency signal through the signal acquisition module 4 and the signal processing module 5 of the signal processing part, and outputs the digital frequency signal through the display module 6.
The invention has the advantages that: the invention provides a portable non-contact frequency detection device, which solves the problem that the resonance frequency of a resonance type icing detector cannot be detected in an installed state. The detection coil 1 and the passive signal amplification module 2 do not need external power supply, and perform non-contact measurement with a probe extending out of the resonant icing detector, so that the detection precision is high, and the detection coil and the passive signal amplification module are independently powered by the power supply device 7, so that the portability is good.
Drawings
Fig. 1 is a schematic structural diagram of the device module of the present invention.
Detailed Description
The invention is described in further detail below with reference to the drawings.
The device is a non-contact frequency detection device and comprises a detection coil 1, a passive signal amplification module 2, a connecting circuit 3, a signal acquisition module 4, a signal processing module 5, a display module 6 and a power module 7. The detection coil 1 is close to the resonant icing detector probe in the working state, and the display module 6 directly displays the frequency value to an operator to visually and clearly obtain the working frequency of the resonant icing detector probe in the working state.
A passive signal amplification module 2 is added behind the detection coil 1, voltage amplitude amplification can be carried out under the condition that voltage frequency is kept unchanged, the anti-interference capacity of signals is improved, and signal acquisition is carried out by a signal acquisition module 4 at the rear end conveniently. The passive signal amplification module 2 does not need an external power supply, and can adopt some passive components to realize a voltage signal method, such as a capacitor and the like.
The connecting circuit 3 transmits the voltage signal processed by the passive signal amplification module 2 to the signal acquisition module 4. In order to avoid the interference of the external electromagnetic environment to the signal, the connecting line 3 needs to adopt shielding measures, such as adopting a shielding wire or adding an electromagnetic shielding wave-proof sleeve.
The signal acquisition module 4 continuously acquires periodic voltage signals, filters noise signals, only retains the required periodic voltage signals, and transmits the periodic voltage signals to the signal processing module 5.
The signal processing module 5 processes the periodic voltage signal into a frequency signal through analog-to-digital conversion, reads the frequency signal frequency and digitally transmits the frequency signal to the display module 6.
The display module 6 receives the frequency value display signal provided by the signal processing module 5 and visually displays the currently detected frequency value to an operator.
The power supply device 7 can realize power supply by adopting a mode of combining a power transformation component and a rechargeable battery, and the power supply device 7 comprises the power transformation component and the rechargeable battery and provides portable power supply for the frequency detection device; the power transformation component converts an externally provided power supply such as commercial power into a charging power supply required by a rechargeable battery, and can be composed of a transformer and a rectifier bridge circuit. The rechargeable battery realizes the function of energy storage, and batteries with long repeated charging times, such as lithium batteries, nickel-metal hydride batteries and the like, can be adopted to provide portable power supply for the detection device under the condition of being separated from an external power supply. After the voltage of the mains supply is processed by the power supply module 7, the voltage of the mains supply can be disconnected from the mains supply and continuously supplies power to a signal processing part of the frequency detection device, wherein the signal processing part comprises the signal acquisition module 4, the signal processing module 5 and the display module 6.
The working flow of the non-contact frequency detection device is as follows:
step 1: the non-contact frequency detection device is powered by commercial power to provide power supply for the power supply device 7 and charge;
step 2: the detection coil 1 is close to a probe extending out of a resonant icing detector in work, senses a probe resonant frequency signal and converts the probe resonant frequency signal into a periodic voltage signal with the same resonant frequency as the probe;
and step 3: the periodic voltage signal sensed by the detection coil 1 is processed into a periodic voltage signal with a constant period and an increased voltage amplitude through the passive signal amplification module 2, and is transmitted to the signal processing part through the connecting circuit 3;
and 4, step 4: the signal acquisition module 4 continuously acquires periodic voltage signals, filters noise signals, only retains the required periodic voltage signals, and transmits the periodic voltage signals to the signal processing module 5;
and 5: the signal processing module 5 processes the periodic voltage signal into a frequency signal through analog-to-digital conversion, transmits the frequency number to the display module 6, and outputs a frequency value through the display module 6.
Claims (9)
1. A non-contact frequency detection device is characterized by comprising a detection coil (1), a connecting circuit (3), a signal acquisition module (4), a signal processing module (5), a display module (6) and a power supply module (7); commercial power voltage passes through power module (7) and handles the back and the commercial power disconnection, continuously give signal acquisition module (4), signal processing module (5), display module (6) power supply, detect probe resonant frequency that coil (10) response resonant mode freezes the detector and stretch out and convert voltage signal, transmit for signal acquisition module (4) through interconnecting link (3), handle the signal and transmit for signal processing module (5) by signal acquisition module (4), signal processing module (5) become frequency digit with voltage signal processing and transmit for display module (6), show the frequency that detects to the operator by display module (6).
2. The non-contact frequency detection device according to claim 1, characterized in that a passive signal amplification module (2) is added after the detection coil (1).
3. The non-contact frequency detection device according to claim 2, wherein the passive signal amplification module (2) can amplify the voltage amplitude under the condition of keeping the voltage frequency unchanged, so that the anti-interference capability of the signal is improved, and the signal acquisition module (4) at the rear end is convenient for acquiring the signal.
4. The non-contact frequency detecting device according to claim 1, wherein the connecting line 3 transmits the voltage signal processed by the passive signal amplifying module (2) to the signal collecting module (4).
5. The non-contact frequency detection device according to claim 1, wherein the signal acquisition module (4) continuously acquires periodic voltage signals, filters out noise signals, retains only the required periodic voltage signals, and transmits the periodic voltage signals to the signal processing module (5).
6. The non-contact frequency detection device according to claim 1, wherein the signal processing module (5) processes the periodic voltage signal into a frequency signal through analog-to-digital conversion, and reads the frequency signal and transmits the frequency number to the display module (6).
7. The non-contact frequency detection device according to claim 1, wherein the display module (6) receives the frequency value display signal provided by the signal processing module (5) and visually displays the currently detected frequency value to an operator.
8. The non-contact frequency detecting device according to claim 1, wherein the power supply device 7 comprises a power transforming component and a rechargeable battery for providing portable power supply for the frequency detecting device; the power transformation component converts a power supply provided by the outside, such as commercial power, into a charging power supply required by the rechargeable battery, and the rechargeable battery realizes the energy storage function and provides portable power supply for the detection device under the condition of being separated from the external power supply.
9. The non-contact frequency detection device according to claim 1, wherein the non-contact frequency detection device utilizes the resonance characteristic of the resonant icing detector probe to generate an induction signal in the detection coil (1) through interaction with the detection coil (1), and the induction signal is processed into a digital frequency signal through the signal acquisition module (4) and the signal processing module (5) of the signal processing part and then is output through the display module (6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911248403.7A CN111121950A (en) | 2019-12-06 | 2019-12-06 | Non-contact frequency detection device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201911248403.7A CN111121950A (en) | 2019-12-06 | 2019-12-06 | Non-contact frequency detection device |
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| CN111121950A true CN111121950A (en) | 2020-05-08 |
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