CN116365441A - Terminal junction box of aircraft windshield and method for detecting humidity - Google Patents

Terminal junction box of aircraft windshield and method for detecting humidity Download PDF

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Publication number
CN116365441A
CN116365441A CN202111609766.6A CN202111609766A CN116365441A CN 116365441 A CN116365441 A CN 116365441A CN 202111609766 A CN202111609766 A CN 202111609766A CN 116365441 A CN116365441 A CN 116365441A
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CN
China
Prior art keywords
humidity
temperature control
wire
shell
windshield
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Pending
Application number
CN202111609766.6A
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Chinese (zh)
Inventor
冯岩鹏
陈力
蒋彬
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Boyan Times Aviation Technology Beijing Co ltd
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Boyan Times Aviation Technology Beijing Co ltd
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Priority to CN202111609766.6A priority Critical patent/CN116365441A/en
Publication of CN116365441A publication Critical patent/CN116365441A/en
Pending legal-status Critical Current

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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
    • H02G3/00—Installations of electric cables or lines or protective tubing therefor in or on buildings, equivalent structures or vehicles
    • H02G3/02—Details
    • H02G3/08—Distribution boxes; Connection or junction boxes
    • H02G3/088—Dustproof, splashproof, drip-proof, waterproof, or flameproof casings or inlets
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B64—AIRCRAFT; AVIATION; COSMONAUTICS
    • B64C—AEROPLANES; HELICOPTERS
    • B64C1/00—Fuselages; Constructional features common to fuselages, wings, stabilising surfaces or the like
    • B64C1/14—Windows; Doors; Hatch covers or access panels; Surrounding frame structures; Canopies; Windscreens accessories therefor, e.g. pressure sensors, water deflectors, hinges, seals, handles, latches, windscreen wipers
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
    • G01D21/00—Measuring or testing not otherwise provided for
    • G01D21/02—Measuring two or more variables by means not covered by a single other subclass
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
    • H02G3/00—Installations of electric cables or lines or protective tubing therefor in or on buildings, equivalent structures or vehicles
    • H02G3/02—Details
    • H02G3/08—Distribution boxes; Connection or junction boxes
    • H02G3/16—Distribution boxes; Connection or junction boxes structurally associated with support for line-connecting terminals within the box

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  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Aviation & Aerospace Engineering (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Investigating Or Analyzing Materials Using Thermal Means (AREA)

Abstract

The invention provides an aircraft windshield terminal junction box and a method for detecting humidity, and belongs to the field of aviation equipment. The terminal junction box of the aircraft windshield glass is arranged on the aircraft windshield glass; the terminal junction box includes: the shell, the humidity sensor and the temperature control plug; the temperature control plug is communicated with the shell; a plurality of wiring terminals are arranged in the temperature control plug; the humidity sensor is connected with the temperature control plug. The invention can timely detect the water inlet condition in or near the terminal junction box and timely feed back the water inlet condition to the control system (WHC), thereby reducing the flight risk.

Description

Terminal junction box of aircraft windshield and method for detecting humidity
Technical Field
The invention belongs to the field of aviation equipment, and particularly relates to an aircraft windshield terminal junction box and a method for detecting humidity.
Background
Current aircraft windshield anti-icing and defogging systems include: heating film, power supply system, temperature monitoring system, etc. The power from the motor is transmitted to the heating film through the terminal plug and the power supply wire. The inside of the anti-collision layer glass at the outermost side of the windshield is plated with a heating film, and when two ends of the heating film are electrified, the heating film generates heat to prevent the windshield from icing and water mist. Temperature monitoring devices are distributed on one side of the heating film, and when the heating film is continuously heated, the filling layer on the inner side of the windshield can be overheated, aged or decomposed. Therefore, when the temperature monitoring device detects high temperature information, the temperature monitoring device is connected with the windshield heating control computer through the lead wire of the terminal junction box. The windshield heating control computer (Windshield Heating Computer, WHC) shuts off the heating system based on the temperature signal, avoiding the continuous generation of high temperatures.
The terminal junction box is a key component of a windshield heating and control system, and is a common interface of a power supply system and a temperature control system. Also when a windshield failure is suspected or found, the resistance and impedance of the windshield heating system and windshield temperature control system need to be detected via the terminal terminals.
However, when the sealing silica gel at the edge of the windshield is used for generating water, the terminal junction box is very easy to be a water storage container, so that a local water storage environment is formed. At this time, if the windshield heating wire wears or the windshield heating wire is immersed in water, an arc is easily generated. However, the current mainstream windshield heating control system does not have arc detection capability. The water inlet inside the junction box is a precondition for the occurrence of an arc or a short circuit, so that the water resistance or the timely detection of the water inlet state becomes a key step of the operation safety of the windshield.
There is currently no good method or way to detect wire wear, especially junction box water ingress. Junction box water accumulation is an important cause of the windshield heating system faults and local high temperature and arc generation of the wires, and if the arc is generated at a key position, structural layer glass of the windshield is cracked, and the windshield is flying off when serious, so that a pilot is in an extremely dangerous environment.
Disclosure of Invention
The invention aims to solve the problems in the prior art and provide an aircraft windshield terminal junction box and a method for detecting humidity, which can timely detect water entering the junction box and timely feed the water back to a control system (WHC) so as to reduce risks.
The invention is realized by the following technical scheme:
in a first aspect of the invention, there is provided an aircraft windshield terminal block, the terminal block being mounted on an aircraft windshield; the terminal junction box includes: the shell, the humidity sensor and the temperature control plug;
the temperature control plug is communicated with the shell;
a plurality of wiring terminals are arranged in the temperature control plug;
the humidity sensor is connected with the temperature control plug.
The invention further improves that:
the humidity sensor adopts a resistance type lithium oxide hygrometer, a dew point type lithium chloride hygrometer, a carbon humidity sensitive element, an alumina humidity sensitive sensor or a ceramic humidity sensor.
The invention further improves that:
the shell is of an L-shaped shell structure with an opening at the rear side, and the opening at the rear side of the shell is adhered to the windshield;
an opening is arranged at the left end of the shell and is used as a lead-out end of the lead, and the right end of the shell is connected with the temperature control plug;
the binding post in the accuse temperature plug includes: a plurality of heating wire terminals, a plurality of temperature measuring wire terminals and a plurality of unused wire terminals.
The invention further improves that:
the humidity sensor comprises a sensor substrate and two humidity acquisition wires connected with two ends of the sensor substrate respectively;
the other ends of the two humidity acquisition wires are respectively connected with unused wiring terminals in the temperature control plug.
The invention further improves that:
the other end of the power supply wire connected with the aircraft windshield penetrates into the inner cavity of the shell from the wire leading-out end and is connected with the heating wire terminal in the temperature control joint;
the other end of the temperature control wire connected with the aircraft windshield penetrates into the inner cavity of the shell from the wire leading-out end and is connected with a temperature measurement wire terminal in the temperature control joint;
the sensor substrate is arranged between the power supply wire, the temperature control wire and the side wall of the shell;
the length of the sensor substrate of the humidity sensor is larger than the width of all the temperature control wires and the power supply wires after being distributed.
The invention further improves that:
the sensor substrate of the humidity sensor is arranged at the joint of the shell and the temperature control joint.
The invention further improves that:
the sensor substrate of the humidity sensor is arranged at the sealed silica gel position at the bottom of the windshield glass, and the other ends of the two humidity acquisition wires penetrate into the inner cavity of the shell from the wire leading-out ends and are connected with the temperature control joint.
The invention further improves that:
the humidity acquisition wire adopts a copper braided wire with a tinned layer, and an insulating bushing made of insulating plastic is arranged outside the wire.
Further, a temperature sensor is arranged in the shell, and a temperature acquisition wire of the temperature sensor is connected with an unused wiring terminal.
According to a second aspect of the invention, a humidity detection method is provided, wherein a humidity sensor is arranged in a terminal junction box of an aircraft windshield, or a humidity sensor is arranged at a sealing silica gel at the bottom of the aircraft windshield, the humidity sensor is used for collecting humidity, then whether the humidity exceeds a set threshold value is judged, and if so, replacement of the aircraft windshield is prompted.
Compared with the prior art, the invention has the beneficial effects that: the invention can timely detect the water inlet condition in or near the terminal junction box and timely feed back the water inlet condition to the control system (WHC), thereby reducing the flight risk.
Drawings
FIG. 1 is a schematic diagram of a terminal on a conventional temperature control joint;
FIG. 2 is a schematic view of a typical installation of a prior art windshield terminal block;
FIG. 3-1 is a schematic view of a prior art windshield terminal block lead terminal;
FIG. 3-2 is a schematic illustration of the routing of moisture into the housing in the terminal block;
FIG. 4 is a recommended installation location of the humidity sensor;
FIG. 5 is a schematic view of the structure of a prior art windshield junction box removed;
FIG. 6-1 is a schematic view of the bottom view of the terminal block of the present invention;
FIG. 6-2 is a schematic side view of the junction box of the present invention;
FIG. 7 is a schematic view of the structure of the lead-out terminal of the terminal block of the present invention;
fig. 8 is a functional structure diagram of the terminal block of the present invention.
Detailed Description
The invention is described in further detail below with reference to the attached drawing figures:
in order to realize detection of accumulated water in the terminal junction box, the humidity sensor is arranged in the junction box, and the humidity information is read by utilizing the WHC or an external detection circuit, so that automatic detection or active detection of the humidity condition in the junction box is realized. When the junction box is found to be water-in, damaged glass is replaced in time, so that technical support is provided for guaranteeing the safety of the air route.
As shown in fig. 2, 6-1 and 6-2, the conventional terminal box for windscreen glass comprises a housing 301 and a temperature control plug 1, wherein the housing 301 is an L-shaped housing structure with an opening at the rear side, an opening is arranged at the left end of the housing 301 and is used as a lead-out end, the temperature control plug 1 is connected to the right end of the housing, and the temperature control plug 1 is communicated with the housing 301.
When installed, the edge of the rear opening of the casing 301 is adhesively attached to the inside of the windscreen 201. The temperature control plug 1 in the embodiment shown in fig. 2 is located below the right end of the housing 301, and the temperature control plug 1 of some other types of windshield terminal junction boxes is located in the middle of the housing, and the direction of the temperature control plug 1 is perpendicular to the glass and faces the side of the cockpit.
The layout of the connection terminals on the existing temperature control plug 1 is shown in fig. 1, the black round terminal is a connection terminal that has been used at present, and specifically includes: 2-3 warming wire terminals (power supply terminals) 101 indicated by large black circles, and 6-8 temperature measuring wire terminals 102 indicated by small black circles. There are also other unused terminals, and the blank ring in fig. 1 is an unused terminal.
The embodiment shown in fig. 1 is only one way of arranging terminals in an existing junction box, and this way is used for an aircraft of a certain model (for example, model ARJ 21), and temperature control plugs of other aircraft may adopt different forms of wiring terminal arrangement, but the common characteristics are that: there are 2-4 power terminals and 4-8 temperature sensing wire terminals and some unused terminals.
The invention utilizes the unused connecting terminals on the temperature control plug 1 to increase the humidity monitoring function inside the terminal junction box.
Specifically, set up humidity transducer in the inside of terminal box, humidity transducer's humidity acquisition wire is connected on unused binding post, can realize the real-time analysis and the detection to the humidity in the terminal box through current outside windscreen control computer (WHC) or outside detection circuitry that heats.
According to the invention, on the premise of not changing the layout mode of the wiring terminals in the existing terminal junction box, the humidity sensor is connected to the spare wiring terminals.
Fig. 3-1 is a schematic view of the structure of the lead-out terminal of the conventional windshield terminal, wherein the rear opening of the casing 301 is adhesively bonded to the glass 201. The lead wires include 2-3 power supply wires 103 and 6-8 temperature control wires 104 (the temperature control wires are connected to the heating film on the inner side of the outer glass of the windshield glass for controlling the temperature of the glass, generally 4-8 wires are divided into 2-4 groups to form a loop for monitoring the temperature of the heating film), all the lead wires are sequentially arranged from top to bottom, and all the wires pass through the edge of the windshield glass through the positions shown in fig. 3-1, enter the inside of the housing 301 through the wire lead-out ends of the terminal junction box, and are connected with the connection terminals in the temperature control plug, wherein the power supply wires 103 are connected with the heating wire terminals 101, and the temperature control wires 104 are connected with the temperature measurement wire terminals 102. Both the lead wires (power supply wire and temperature control wire) are copper braided wires with tin plating layers, and the periphery of the lead wires is provided with an insulating lining formed by insulating plastic (vinylidene chloride polytetrafluoroethylene).
Fig. 5 is a schematic view of the structure of the conventional windshield terminal block taken out, the view being from the rear side opening to the front side of the case, and the power supply wire 103 and the temperature control wire 104 in fig. 5 are connected to the terminal block.
The humidity sensor used in the present invention may be one of the following existing humidity sensors:
resistive lithium oxide hygrometers, dew point lithium chloride hygrometers, carbon humidity sensors, alumina humidity sensors or ceramic humidity sensors, and the like.
Preferably, the humidity sensor is an alumina humidity sensor, mainly because the alumina humidity sensor has small volume and is easy to be installed in the junction box, and meanwhile, the sensitivity is high, so that the WHC can conveniently collect information in the junction box in real time or access other instruments and equipment into the wiring terminal after aviation, and the sampling detection of humidity is realized.
The humidity sensor can be mounted at any position inside the junction box, for example at the incoming line position, at the lower part of the housing.
Preferably, as shown in fig. 4, the humidity sensor is installed between the power supply wire, the temperature control wire and the side wall of the housing, and may also be installed at the connection of the housing and the temperature control joint. The reasons are as follows:
first, the location shown in FIG. 3-1 is the lead-out of the wire, typically with a moisture path between the sealing silicone and windshield at the periphery of the wire. Moisture will enter the interior cavity of the housing along the wires (including power wires, temperature control wires) from the opening on the left side of the housing, as shown by the dashed lines in fig. 3-2. The first recommended location for the humidity sensor is therefore between the lead-out wire and the side wall of the housing.
Secondly, after the steam enters the inner cavity of the shell, the steam is easy to reside in the temperature control plug. In order to conduct electricity, a small section of the wire at the connection part of the connecting terminal and the wire must be exposed to form a nesting gap (generally 0.5-0.8 mm), and the exposed section of the wire is easy to generate an electric arc after encountering water vapor. The second recommended place for the installation of the humidity sensor is therefore on the back of the temperature-control plug, i.e. the junction of the temperature-control plug with the housing.
The humidity sensor is installed as follows:
the humidity sensor is generally in the form of a sheet or needle, and a sheet alumina humidity sensor is preferably used. As shown in fig. 4, the sheet alumina humidity sensor includes: the sensor substrate 501 is an aluminum substrate sheet, namely a rectangular aluminum plate, and the humidity acquisition wires 502 can be connected to the sensor substrate 501 in a plurality of existing modes, and the preferred construction method is to weld the lead wires of the humidity sensor at two ends of the sensor substrate 501 respectively by adopting a laser welding process.
One end of each humidity acquisition wire is connected with the aluminum substrate sheet, and the other end is connected to a connecting terminal of a temperature control plug which is not used at present (the temperature control plug of the windshield glass of any aircraft is provided with a surplus connecting terminal, and the temperature control plug can be used for expanding functions). The humidity acquisition wire is recommended to be made of the same material as the wire of the windshield glass temperature sensor, namely a tinned copper braided wire, and the wire has low resistivity and strong bending damage resistance, and other wires can be used.
Preferably, the length of the sensor substrate 501 of the humidity sensor is greater than the width of all the temperature control wires and the power supply wires after being arranged, so that the water vapor entering along each wire can be fully detected.
Fig. 4 shows a preferred installation position of the humidity sensor, in which the sensor substrate 501 and the humidity acquisition wires 502 are located in the inner cavity of the housing 301, and the other end of the humidity acquisition wires 502 is connected to the unused connection terminals in fig. 1.
Fig. 7 is a schematic view of the structure of the lead-out terminal of the junction box with the humidity self-checking function according to the present invention, in which the humidity sensor substrate 501 is located between the lead-out wire and the side wall of the junction box 301.
Fig. 8 is a functional structure diagram of a junction box with humidity self-checking function according to the present invention. The humidity sensor is located inside the terminal box (the dew point probe in fig. 8 refers to the humidity sensor) for detecting the water inflow inside the terminal box, and the temperature control wire of the windshield is connected to the temperature measuring resistor on the glass for detecting and controlling the heating condition of the windshield. The power supply leads are connected to bus bars on two sides of the windshield, and the electric charges are connected to the heating film through the bus bars, so that the automatic control heating of the windshield is realized.
Further, a temperature sensor can be arranged in the terminal junction box, and a temperature acquisition wire of the temperature sensor is connected with an unused wiring terminal, so that the temperature in the terminal junction box can be detected. When the temperature control plug is used for post-navigation inspection, the humidity and temperature information in the shell can be read by using the humidity sensor and the temperature sensor as long as the external equipment is connected with the temperature control plug, so that the safety of the system can be greatly improved.
In order to avoid shielding the sight, the shell of the terminal junction box is generally arranged near the left lower corner or the right lower corner of the windshield glass, and the left lower corner and the right lower corner are just places where water vapor is easy to gather, in order to move forward the position for detecting humidity, the humidity sensor can be arranged at the sealing silica gel position of the left lower corner and the right lower corner closest to the shell, specifically, when the windshield glass is sealed by the sealing silica gel, the sensor substrate of the humidity sensor is directly adhered to the sealing silica gel, and then the other end of the humidity acquisition wire penetrates into the inner cavity of the shell from the wire leading-out end on the shell and is connected with the temperature control joint. Like this, when the silica gel no longer seals tightly, steam can collect windshield's lower left corner, lower right corner, and steam can contact sensor substrate this moment, and then humidity transducer can detect humidity, just so before steam enters into terminal box's casing, defect and hidden danger have earlier been found.
Furthermore, the invention also provides a humidity detection method, which can detect the water accumulation condition in the terminal junction box by using the terminal junction box, or set the humidity sensor at the sealing silica gel position at the bottom of the windshield glass, so that defects and hidden dangers can be found earlier before water vapor enters the shell.
When water enters the junction box, arc faults can be caused, and the windshield glass is broken and flies off under severe conditions, so that flight safety is compromised. The invention can obtain the humidity in or near the shell, if the humidity is too high (namely, the humidity exceeds the set threshold), the corrosion and the breakage of the temperature control lead are easy to cause, so that after water is fed, workers can be prompted to replace the windshield glass in time, the fault glass is not used for flying, and the flying safety is further ensured.
In the description of the present invention, it should be noted that, unless explicitly specified and limited otherwise, the terms "connected," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.
In the description of the present invention, unless otherwise indicated, the terms "upper," "lower," "left," "right," "inner," "outer," and the like are used for convenience in describing the present invention and simplifying the description based on the orientation or positional relationship shown in the drawings, and do not denote or imply that the devices or elements in question must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present invention.
Finally, it should be noted that the above-mentioned technical solution is only one embodiment of the present invention, and various modifications and variations can be easily made by those skilled in the art based on the application methods and principles disclosed in the present invention, and are not limited to the methods described in the above-mentioned specific embodiments of the present invention, therefore, the foregoing description is only preferred, and not meant to be limiting.

Claims (10)

1. An aircraft windshield terminal block, characterized in that: the terminal junction box is arranged on an aircraft windshield; the terminal junction box includes: the shell, the humidity sensor and the temperature control plug;
the temperature control plug is communicated with the shell;
a plurality of wiring terminals are arranged in the temperature control plug;
the humidity sensor is connected with the temperature control plug.
2. An aircraft windshield terminal block according to claim 1, wherein: the humidity sensor adopts a resistance type lithium oxide hygrometer, a dew point type lithium chloride hygrometer, a carbon humidity sensitive element, an alumina humidity sensitive sensor or a ceramic humidity sensor.
3. An aircraft windshield terminal block according to claim 1, wherein: the shell is of an L-shaped shell structure with an opening at the rear side, and the opening at the rear side of the shell is adhered to the windshield;
an opening is arranged at the left end of the shell and is used as a lead-out end of the lead, and the right end of the shell is connected with the temperature control plug;
the binding post in the accuse temperature plug includes: a plurality of heating wire terminals, a plurality of temperature measuring wire terminals and a plurality of unused wire terminals.
4. An aircraft windshield terminal block according to claim 3, wherein: the humidity sensor comprises a sensor substrate and two humidity acquisition wires connected with two ends of the sensor substrate respectively; the other ends of the two humidity acquisition wires are respectively connected with unused wiring terminals in the temperature control plug.
5. An aircraft windshield terminal block according to claim 4, wherein: the other end of the power supply wire connected with the aircraft windshield penetrates into the inner cavity of the shell from the wire leading-out end and is connected with the heating wire terminal in the temperature control joint;
the other end of the temperature control wire connected with the aircraft windshield penetrates into the inner cavity of the shell from the wire leading-out end and is connected with a temperature measurement wire terminal in the temperature control joint;
the sensor substrate is arranged between the power supply wire, the temperature control wire and the side wall of the shell;
the length of the sensor substrate of the humidity sensor is larger than the width of all the temperature control wires and the power supply wires after being distributed.
6. An aircraft windshield terminal block according to claim 4, wherein: the sensor substrate of the humidity sensor is arranged at the joint of the shell and the temperature control joint.
7. An aircraft windshield terminal block according to claim 4, wherein: the sensor substrate of the humidity sensor is arranged at the sealed silica gel position at the bottom of the windshield glass, and the other ends of the two humidity acquisition wires penetrate into the inner cavity of the shell from the wire leading-out ends and are connected with the temperature control joint.
8. An aircraft windshield terminal block according to claim 4, wherein: the humidity acquisition wire adopts a copper braided wire with a tinned layer, and an insulating bushing made of insulating plastic is arranged outside the wire.
9. An aircraft windshield terminal block according to claim 3, wherein: a temperature sensor is arranged in the shell, and a temperature acquisition wire of the temperature sensor is connected with an unused wiring terminal.
10. A humidity detection method, characterized in that: the method comprises the steps of arranging a humidity sensor in a terminal junction box of the aircraft windshield, or arranging the humidity sensor at a sealing silica gel position at the bottom of the aircraft windshield, collecting humidity by using the humidity sensor, judging whether the humidity exceeds a set threshold value, and if so, prompting replacement of the aircraft windshield.
CN202111609766.6A 2021-12-27 2021-12-27 Terminal junction box of aircraft windshield and method for detecting humidity Pending CN116365441A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202111609766.6A CN116365441A (en) 2021-12-27 2021-12-27 Terminal junction box of aircraft windshield and method for detecting humidity

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202111609766.6A CN116365441A (en) 2021-12-27 2021-12-27 Terminal junction box of aircraft windshield and method for detecting humidity

Publications (1)

Publication Number Publication Date
CN116365441A true CN116365441A (en) 2023-06-30

Family

ID=86925209

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202111609766.6A Pending CN116365441A (en) 2021-12-27 2021-12-27 Terminal junction box of aircraft windshield and method for detecting humidity

Country Status (1)

Country Link
CN (1) CN116365441A (en)

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