CN111114792B - Icing sensor and method capable of calculating icing rate - Google Patents
Icing sensor and method capable of calculating icing rate Download PDFInfo
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- CN111114792B CN111114792B CN201911323255.0A CN201911323255A CN111114792B CN 111114792 B CN111114792 B CN 111114792B CN 201911323255 A CN201911323255 A CN 201911323255A CN 111114792 B CN111114792 B CN 111114792B
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- icing
- temperature
- rate
- heater assemblies
- signal processing
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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
- B64D15/12—De-icing or preventing icing on exterior surfaces of aircraft by electric heating
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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
- B64D15/22—Automatic initiation by icing detector
Abstract
The invention discloses an icing detector capable of resolving icing rate and a method thereof, wherein the detector comprises a signal processing circuit, two heating components respectively arranged on a windward side and a leeward side, and two temperature sensors respectively detecting the external temperatures of the windward side and the leeward side, wherein the two temperature sensors detect the real-time temperatures of the windward side and the leeward side, and the signal processing circuit controls the on/off states of the two heater components according to the detected real-time temperatures; when the two heater assemblies are in the on state, the signal processing circuit controls the two heater assemblies to keep the same first preset temperature, and the icing rate is calculated according to the current difference of the two heater assemblies. The icing sensor and the icing method not only can detect the icing thickness, but also can calculate the icing rate, and the icing condition can be detected more comprehensively and effectively.
Description
Technical Field
The invention belongs to the technical field of ice prevention and deicing, and relates to an icing sensor capable of calculating an icing rate and a method.
Background
The icing sensor is used as special detection equipment for detecting whether icing exists on the surface of the airplane when the airplane flies under the icing meteorological condition. At present, icing sensing technology is successfully applied in many fields, but most icing detection technologies detect icing thickness, are immature in the aspect of icing rate settlement, have certain time delay in icing thickness detection, cannot reflect icing conditions in real time, and have certain limitation in icing thickness-based detection when icing rate is too high.
Disclosure of Invention
In view of the above-mentioned circumstances of the prior art, it is an object of the present invention to provide an icing sensor and method that can resolve the icing rate to more fully and effectively monitor the icing condition.
According to one aspect of the invention, there is provided an icing detector capable of resolving an icing rate, comprising signal processing circuitry, two heating elements disposed on a windward side and a leeward side, respectively, and two temperature sensors for sensing an external ambient temperature of the windward side and the leeward side, respectively,
the two temperature sensors detect the real-time temperatures of the windward side and the leeward side, and the signal processing circuit controls the on/off states of the two heater assemblies according to the detected real-time temperatures;
when the two heater assemblies are in the on state, the signal processing circuit controls the two heater assemblies to keep the same first preset temperature, and the icing rate is calculated according to the current difference of the two heater assemblies.
Wherein the signal processing circuit can also calculate the icing thickness according to the calculated icing rate.
The icing rate is calculated according to the relationship between the icing rate and the difference between the currents of the windward side and the leeward side which are determined in advance through calibration experiments.
Wherein the signal processing circuit controls the off/on states of the two heater assemblies according to the detected real-time temperature includes the signal processing circuit controlling the two heater assemblies to be in the off state when the detected temperature is higher than a second predetermined temperature, and the signal processing circuit controlling the two heater assemblies to be in the on state when the detected temperature is equal to or lower than the second predetermined temperature, wherein the second predetermined temperature is 5 ℃, wherein the first predetermined temperature is 100 ℃.
According to a second aspect of the present invention, there is provided an icing detection method capable of resolving an icing rate, comprising the steps of:
respectively detecting the real-time temperature of the windward side and the leeward side, and controlling the off/on states of two heater assemblies respectively arranged on the windward side and the leeward side according to the detected real-time temperature;
when the two heater assemblies are in the on state, the two heater assemblies are kept at the same first preset temperature, and the icing rate is calculated according to the current difference of the two heater assemblies.
The method may further include calculating an icing thickness based on the calculated icing rate.
The icing rate is calculated according to the relationship between the icing rate and the difference between the currents of the windward side and the leeward side which are determined in advance through calibration experiments.
Wherein controlling the off/on states of the two heater assemblies according to the detected real-time temperature includes bringing the two heater assemblies into the off state when the detected temperature is higher than a second predetermined temperature, and bringing the two heater assemblies into the on state when the detected temperature is equal to or lower than the second predetermined temperature.
The icing sensor and the icing method not only can detect the icing thickness, but also can calculate the icing rate, and the icing condition can be detected more comprehensively and effectively.
Drawings
FIG. 1 is a block diagram of an icing detector of the present invention that resolves icing rates.
Detailed Description
For a clearer understanding of the objects, technical solutions and advantages of the present invention, the present invention will be described in further detail below with reference to the accompanying drawings and embodiments.
FIG. 1 is a block diagram of an icing detector of the present invention that resolves icing rates. As shown in the figure, the icing detector capable of calculating the icing rate comprises a signal processing circuit, two heating assemblies respectively arranged on the windward side and the leeward side, and two temperature sensors respectively used for detecting the external temperature of the windward side and the leeward side.
The two temperature sensors on the windward side and the leeward side detect real-time temperatures, the detected temperatures are provided to the signal processing circuit in a feedback signal mode, and the signal processing circuit controls the on/off states of the two heater assemblies according to the detected real-time temperatures. Specifically, in this example, the signal processing circuit determines whether the detected real-time temperature is higher than 5 ℃ (the second predetermined temperature), and it is generally considered that the icing phenomenon occurs when the temperature is lower than 5 ℃, so the temperature is determined to be 5 ℃ in the present embodiment, although the temperature is not limited thereto, and may be set to other temperatures as appropriate. When the detected real-time temperature is higher than 5 ℃, the signal processing circuit controls the two heater assemblies to be in an off state, and when the detected real-time temperature is equal to or lower than 5 ℃, the signal processing circuit controls the two heater assemblies to be switched on and gives heating instructions to the two heater assemblies so that the two heater assemblies keep the same temperature, and the temperature is between 90 ℃ and 110 ℃, because when the temperature is in the temperature range, the moisture on the surface of the heater assembly on the leeward side can be considered to be almost completely evaporated, and the leeward side has no moisture content, so that the icing phenomenon cannot be generated, and the same temperature is determined to be 100 ℃ (the first predetermined temperature) in the embodiment.
When no icing occurs, the power of the two heater components is consistent, no current difference exists, when the icing phenomenon of moisture caused by wind beside the windward heater component exists, the surface temperature of the windward heater component can be reduced, and because the voltage of the two heater components is the same, in order to ensure that the temperature of the two heater components is consistent, the signal processing circuit increases the heating power of the windward heater component by changing the resistance of the windward heater component, so that the current I of the windward heater component1Increase in the lee side current I2The difference is generated, and the real-time icing rate can be calculated by the signal processing circuit according to the current difference and by combining the relationship between the icing rate and the difference between the currents of the windward side and the leeward side which are predetermined through a calibration experiment. The freezing rate can be divided into weak freezing, moderate freezing, strong freezing and strong freezing. The icing rates represented by the different icing rate signals are as follows: weak icing: JBv (freezing rate) < 0.6 mm/min; moderate freezing: the thickness of the film is not less than 0.6mm/min and not more than JBv and less than 1.0 mm/min; strong icing: JBv is not less than 1.0mm/min and not more than 2.0 mm/min; extremely strong freezing: JBv is more than 2.0mm/min, and the icing thickness can be further obtained according to the integration of the icing speed in time.
The icing sensor and the icing method not only can detect the icing thickness, but also can calculate the icing rate, and the icing condition can be detected more comprehensively and effectively.
Claims (10)
1. An icing detector capable of calculating icing rate comprises a signal processing circuit, two heating assemblies respectively arranged on a windward side and a leeward side, and two temperature sensors respectively detecting the external temperature of the windward side and the leeward side,
the two temperature sensors detect the real-time temperatures of the windward side and the leeward side, and the signal processing circuit controls the on/off states of the two heater assemblies according to the detected real-time temperatures;
when the two heater assemblies are in the on state, the signal processing circuit controls the two heater assemblies to keep the same first preset temperature, and the icing rate is calculated according to the current difference of the two heater assemblies.
2. The icing detector capable of resolving icing rates of claim 1, wherein the signal processing circuitry is further capable of resolving icing thickness based on the resolved icing rate.
3. The icing detector capable of resolving icing rates according to claim 1 or 2, wherein the resolution of icing rates is based on the difference between windward and leeward currents and the icing rate determined beforehand by calibration experiments.
4. The icing probe capable of resolving an icing rate according to claim 1, wherein the signal processing circuit controlling the off/on states of the two heater assemblies according to the detected real-time temperature includes the signal processing circuit controlling the two heater assemblies to be in the off state when the detected temperature is higher than a second predetermined temperature and controlling the two heater assemblies to be in the on state when the detected temperature is equal to or less than the second predetermined temperature.
5. The icing detector capable of resolving icing rates according to claim 4, wherein the second predetermined temperature is 5 ℃.
6. The icing detector capable of resolving icing rates according to claim 1, wherein the first predetermined temperature is 100 ℃.
7. An icing detection method capable of resolving an icing rate, comprising the following steps:
respectively detecting the real-time temperature of the windward side and the leeward side, and controlling the off/on states of two heater assemblies respectively arranged on the windward side and the leeward side according to the detected real-time temperature;
when the two heater assemblies are in the on state, the two heater assemblies are kept at the same first preset temperature, and the icing rate is calculated according to the current difference of the two heater assemblies.
8. The icing detection method capable of calculating an icing rate of claim 7 further comprising calculating an icing thickness based on the calculated icing rate.
9. The icing detection method capable of calculating the icing rate according to claim 7 or 8, wherein the calculation of the icing rate is performed according to the relationship between the icing rate and the difference between the windward current and the leeward current, which is determined in advance through calibration experiments.
10. The icing detection method capable of calculating an icing rate according to claim 7, wherein controlling the off/on states of the two heater assemblies according to the detected real-time temperature includes putting the two heater assemblies in the off state when the detected temperature is higher than a second predetermined temperature and putting the two heater assemblies in the on state when the detected temperature is equal to or lower than the second predetermined temperature.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201911323255.0A CN111114792B (en) | 2019-12-19 | 2019-12-19 | Icing sensor and method capable of calculating icing rate |
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| CN201911323255.0A CN111114792B (en) | 2019-12-19 | 2019-12-19 | Icing sensor and method capable of calculating icing rate |
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| CN111114792B true CN111114792B (en) | 2021-04-23 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112498699A (en) * | 2020-12-11 | 2021-03-16 | 武汉航空仪表有限责任公司 | Icing detector based on electric heating principle |
| CN112896525A (en) * | 2020-12-24 | 2021-06-04 | 太原航空仪表有限公司 | Resistance type icing detector |
| CN115909669B (en) * | 2023-03-10 | 2023-05-16 | 长安大学 | Road surface temperature monitoring system and device for anti-icing and deicing control of asphalt road surface |
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| US8348501B2 (en) * | 2002-11-19 | 2013-01-08 | Rosemount Aerospace, Inc. | Thermal icing conditions detector |
| CA2704249C (en) * | 2005-02-24 | 2013-02-12 | Bell Helicopter Textron Inc. | Ice management system for tiltrotor aircraft |
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