A system and method for heating a total and static pressure sensor

Abstract

The application belongs to the technical field of atmospheric data system, and particularly relates to a system and method for heating total pressure sensor and static pressure sensor. The system comprises: a total pressure sensor connected with an atmospheric data computer through a total pressure pipeline; a static pressure sensor connected with the atmospheric data computer through a static pressure pipeline; a first control pipeline connected with an on-board air source system at one end and connected with the total pressure sensor at the other end, and a second control pipeline connected with the on-board air source system at one end and connected with the static pressure sensor at the other end; a first electric control one-way valve arranged on the first control pipeline, and a second electric control one-way valve arranged on the second control pipeline; and the atmospheric data computer is used for controlling the opening or closing of the first electric control one-way valve according to the signal of the total pressure sensor received, and for controlling the opening or closing of the second electric control one-way valve according to the signal of the static pressure sensor received. The application can provide a backup heating measure, improve the system safety, and ensure the flight task and flight safety.

Description

Technical Field

[0001] This application belongs to the field of atmospheric data system technology, and specifically relates to a system and method for heating total and static pressure sensors. Background Technology

[0002] Aircraft are typically equipped with total pressure sensors and static pressure sensors to collect the total and static pressure information of the incoming airflow, which is then transmitted to the air data computer via pipelines. After processing, the air data computer calculates atmospheric data parameters such as altitude, speed, Mach number, and climb rate, and transmits them to the onboard flight control and avionics systems via a designated bus.

[0003] To ensure that the total and static pressure sensors can provide accurate and reliable total static pressure information to the air data computer in the air, electric heating wires are typically installed at the head of the total pressure sensor and around the pressure orifice of the static pressure sensor to prevent icing and blockage. However, if the electric heating wires inside the total and static pressure sensors break, causing the heating function to fail, there is a high probability of icing in the air, blocking the total and static pressure orifices. This prevents the air data computer from properly calculating the relevant atmospheric data parameters, thus affecting flight missions and even flight safety.

[0004] Therefore, it is desirable to have a technical solution to overcome or at least mitigate one of the aforementioned defects of the prior art. Summary of the Invention

[0005] The purpose of this application is to provide a system and method for heating the total and static pressure sensors to solve the problem in the prior art where atmospheric data parameters cannot be calculated normally when the heating of the total and static pressure sensors fails.

[0006] The technical solution of this application is:

[0007] The first aspect of this application provides a system for heating a total and static pressure sensor, comprising:

[0008] Total pressure sensor, which is connected to an atmospheric data computer via a total pressure line;

[0009] A static pressure sensor, which is connected to an atmospheric data computer via a static pressure pipeline;

[0010] The environmental control pipeline includes a first environmental control pipeline and a second environmental control pipeline. One end of the first environmental control pipeline is connected to the onboard air supply system, and the other end is connected to the total pressure sensor. One end of the second environmental control pipeline is connected to the onboard air supply system, and the other end is connected to the static pressure sensor.

[0011] An electrically controlled check valve includes a first electrically controlled check valve and a second electrically controlled check valve, wherein the first electrically controlled check valve is disposed on the first environmental control pipeline and the second electrically controlled check valve is disposed on the second environmental control pipeline;

[0012] An atmospheric data computer is configured to control the opening or closing of the first electrically controlled check valve based on a signal received from the total pressure sensor, and to control the opening or closing of the second electrically controlled check valve based on a signal received from the static pressure sensor.

[0013] In at least one embodiment of this application, the total pressure sensor is provided with a first gas line connector, and the first environmental control pipeline is connected to the first gas line connector.

[0014] In at least one embodiment of this application, the static pressure sensor is provided with a second air passage connector, and the second air control pipeline is connected to the second air passage connector.

[0015] In at least one embodiment of this application, both the first and second loop control pipelines are covered with a heat insulation layer.

[0016] In at least one embodiment of this application, the atmospheric data computer receives a first pressure signal from the total pressure sensor through a total pressure pipeline and converts the first pressure signal into a first current signal.

[0017] In at least one embodiment of this application, the atmospheric data computer is used to control the opening or closing of the first electrically controlled check valve according to the first current signal.

[0018] In at least one embodiment of this application, the atmospheric data computer receives a second pressure signal from the static pressure sensor through a static pressure pipeline and converts the second pressure signal into a second current signal.

[0019] In at least one embodiment of this application, the atmospheric data computer is used to control the opening or closing of the second electrically controlled check valve according to the second current signal.

[0020] In at least one embodiment of this application, the air data computer is used to control the opening or closing of the first electronically controlled one-way valve according to received pilot instructions.

[0021] In at least one embodiment of this application, the air data computer is used to control the opening or closing of the second electronically controlled check valve according to received pilot instructions.

[0022] A second aspect of this application provides a method for heating a total and static pressure sensor, based on the system for heating a total and static pressure sensor as described above, comprising:

[0023] When the atmospheric data computer detects a heating failure in the total pressure sensor and / or static pressure sensor: it sends a valve opening command to the electrically controlled check valve;

[0024] After the electrically controlled check valve is opened, the high-temperature and high-pressure airflow output by the onboard air supply system is transmitted through the environmental control pipeline to the total pressure sensor and / or static pressure sensor that has failed to be heated.

[0025] High-temperature, high-pressure airflow blows away or melts the ice buildup on the surface of the total pressure sensor and / or static pressure sensor, enabling them to function properly.

[0026] In at least one embodiment of this application, the atmospheric data computer determines whether the heating status is normal by detecting the current signal of the total pressure sensor and / or the static pressure sensor.

[0027] In at least one embodiment of this application, the atmospheric data computer sends a valve opening command to the electrically controlled check valve via an electrical signal.

[0028] The invention has at least the following beneficial technical effects:

[0029] The system for heating the total and static pressure sensors in this application can output high-temperature, high-pressure airflow to the sensors through the existing onboard system when the heating functions of the total and static pressure sensors on the aircraft fail individually or completely, resulting in icing and blockage. This airflow blows away or melts the ice on the sensor surface, allowing the sensors to return to normal operation and ensuring reliable output of total and static pressure information to the atmospheric data computer. Attached Figure Description

[0030] Figure 1 This is a schematic diagram of a system for heating the total and static pressure sensors according to one embodiment of this application;

[0031] Figure 2 This is a flowchart of a method for heating the total and static pressure sensors according to one embodiment of this application. Detailed Implementation

[0032] To make the objectives, technical solutions, and advantages of this application clearer, the technical solutions in the embodiments of this application will be described in more detail below with reference to the accompanying drawings. In the drawings, the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The described embodiments are some, but not all, embodiments of this application. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this application, and should not be construed as limiting this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application. The embodiments of this application will be described in detail below with reference to the accompanying drawings.

[0033] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting the scope of protection of this application.

[0034] The following is in conjunction with the appendix Figures 1 to 2 This application will be described in further detail.

[0035] The first aspect of this application provides a system for heating total and static pressure sensors, comprising: a total pressure sensor, a static pressure sensor, an environmental control line, an electrically controlled check valve, and an atmospheric data computer.

[0036] Specifically, such as Figure 1 As shown, the total pressure sensor is connected to the air data computer via a total pressure line; the static pressure sensor is connected to the air data computer via a static pressure line; the environmental control line includes a first environmental control line and a second environmental control line. One end of the first environmental control line is connected to the onboard air supply system, and the other end is connected to the total pressure sensor. One end of the second environmental control line is connected to the onboard air supply system, and the other end is connected to the static pressure sensor; the electrically controlled check valve includes a first electrically controlled check valve and a second electrically controlled check valve. The first electrically controlled check valve is located on the first environmental control line, and the second electrically controlled check valve is located on the second environmental control line. The electrically controlled check valve mainly includes an electromagnet, a mechanical check valve, and a control circuit, which is controlled by the air data computer. The air data computer is used to control the opening or closing of the first electrically controlled check valve based on the signal received from the total pressure sensor, and to control the opening or closing of the second electrically controlled check valve based on the signal received from the static pressure sensor.

[0037] In a preferred embodiment of this application, both the total pressure sensor and the static pressure sensor are provided with a separate air connection port for connecting to the piping of the electrically controlled check valve. Specifically, the total pressure sensor is provided with a first air connection port, to which a first air control line is connected. The static pressure sensor is provided with a second air connection port, to which a second air control line is connected.

[0038] In a preferred embodiment of this application, both the first and second loop control pipelines are wrapped with a heat insulation layer to ensure the high temperature of the airflow inside the pipelines.

[0039] In a preferred embodiment of this application, the atmospheric data computer receives a first pressure signal from the total pressure sensor via the total pressure pipeline, converts the first pressure signal into a first current signal, and controls the opening or closing of the first electrically controlled check valve based on the first current signal. The atmospheric data computer receives a second pressure signal from the static pressure sensor via the static pressure pipeline, converts the second pressure signal into a second current signal, and controls the opening or closing of the second electrically controlled check valve based on the second current signal. The atmospheric data computer can detect the heating status of the total pressure sensor and the static pressure sensor based on the current signals from the two sensors. When it determines that the heating status is invalid, it sends a valve opening command to the corresponding electrically controlled check valve.

[0040] Advantageously, in this embodiment, the air data computer is also used to control the opening or closing of the first electrically controlled check valve according to the received pilot instructions, and to control the opening or closing of the second electrically controlled check valve according to the received pilot instructions.

[0041] The system for heating the total and static pressure sensors in this application uses an atmospheric data computer to monitor the heating status of the total and static pressure sensors. When the heating status fails, a valve opening command is sent to the electrically controlled check valve. The electrically controlled check valve can receive the valve opening / closing command sent by the atmospheric data computer and outputs high-temperature, high-pressure airflow from the onboard air supply system to the total and static pressure sensors as needed through the environmental control pipeline. The environmental control pipeline is used to transmit high-temperature, high-pressure airflow from the onboard air supply system, and its exterior is wrapped with a heat insulation layer to ensure the high temperature of the airflow inside the pipeline. The total and static pressure sensors are equipped with separate air supply nozzles and receive high-temperature, high-pressure airflow from the onboard air supply system through these nozzles.

[0042] Based on the above-described system for heating the total and static pressure sensors, a second aspect of this application provides a method for heating the total and static pressure sensors, specifically including:

[0043] When the atmospheric data computer detects a heating failure in the total pressure sensor and / or static pressure sensor: it sends a valve opening command to the electrically controlled check valve;

[0044] After the electrically controlled check valve is opened, the high-temperature and high-pressure airflow output by the onboard air supply system is transmitted through the environmental control pipeline to the total pressure sensor and / or static pressure sensor that has failed to be heated.

[0045] High-temperature, high-pressure airflow blows away or melts the ice buildup on the surface of the total pressure sensor and / or static pressure sensor, enabling them to function properly.

[0046] In a preferred embodiment of this application, the atmospheric data computer determines whether the heating status is normal by detecting the current signals of the total pressure sensor and / or the static pressure sensor. The atmospheric data computer sends a valve opening command to the electrically controlled check valve via an electrical signal.

[0047] The heating method for the total and static pressure sensors in this application allows for the output of accurate total and static pressure information to the air data computer for calculating air data parameters when the heating function of the onboard total and static pressure sensors is normal. When the heating wire of the onboard total and static pressure sensors breaks, causing the heating function to fail, the air data computer detects an abnormal heating current and can accurately obtain the heating status. At this time, the air data computer sends a valve opening command to the one-way solenoid valve. Upon receiving the opening command, the one-way solenoid valve controls its internal mechanical valve to rotate and open, allowing high-temperature, high-pressure airflow from the onboard air source system to flow through the control pipeline to the total and static pressure sensors. The high-temperature, high-pressure airflow can blow away ice buildup on the total pressure port of the total pressure sensor or the static pressure port of the static pressure sensor, and utilizes the high temperature to provide heating for the total and static pressure sensors.

[0048] The method for heating the total and static pressure sensors in this application effectively ensures the accuracy of the total and static pressure information output by setting up a separate air path connector for the total and static pressure sensors to receive high-temperature, high-pressure airflow from the onboard air source system, without sharing the air path connector connected to the air data computer.

[0049] Preferably, when the pilot determines that the atmospheric data parameters calculated by the atmospheric data computer corresponding to the faulty total and static pressure sensors on the aircraft have returned to normal, the pilot can send a valve closing command to the electronically controlled check valve through the atmospheric data computer and operate the aircraft to return to base as soon as possible.

[0050] The system and method for heating the total and static pressure sensors in this application are simple and reliable to implement, require minimal onboard modifications, and can provide backup heating measures when the onboard total and static pressure sensor heating function fails, thereby improving system safety and ensuring flight mission and flight safety.

[0051] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A system for heating total and static pressure sensors, characterized in that, include: Total pressure sensor, which is connected to an atmospheric data computer via a total pressure line; A static pressure sensor, which is connected to an atmospheric data computer via a static pressure pipeline; The environmental control pipeline includes a first environmental control pipeline and a second environmental control pipeline. One end of the first environmental control pipeline is connected to the onboard air supply system, and the other end is connected to the total pressure sensor. One end of the second environmental control pipeline is connected to the onboard air supply system, and the other end is connected to the static pressure sensor. An electrically controlled check valve includes a first electrically controlled check valve and a second electrically controlled check valve, wherein the first electrically controlled check valve is disposed on the first environmental control pipeline and the second electrically controlled check valve is disposed on the second environmental control pipeline; An atmospheric data computer is configured to control the opening or closing of the first electrically controlled check valve based on the received signal from the total pressure sensor, and to control the opening or closing of the second electrically controlled check valve based on the received signal from the static pressure sensor. Methods for heating the total and static pressure sensors include: When the atmospheric data computer detects a heating failure in the total pressure sensor and / or static pressure sensor: it sends a valve opening command to the electrically controlled check valve; After the electrically controlled check valve is opened, the high-temperature and high-pressure airflow output by the onboard air supply system is transmitted through the environmental control pipeline to the total pressure sensor and / or static pressure sensor that has failed to be heated. High-temperature, high-pressure airflow blows away or melts the ice buildup on the surface of the total pressure sensor and / or static pressure sensor, enabling them to function properly.

2. The system for heating the total and static pressure sensors according to claim 1, characterized in that, The total pressure sensor is equipped with a first gas line connector, and the first environmental control pipeline is connected to the first gas line connector.

3. The system for heating the total and static pressure sensors according to claim 2, characterized in that, The static pressure sensor is equipped with a second air passage connector, and the second air control pipeline is connected to the second air passage connector.

4. The system for heating the total and static pressure sensors according to claim 3, characterized in that, Both the first and second ring control pipelines are wrapped with a heat insulation layer.

5. The system for heating the total and static pressure sensors according to claim 4, characterized in that, The atmospheric data computer receives the first pressure signal from the total pressure sensor through the total pressure pipeline and converts the first pressure signal into a first current signal.

6. The system for heating the total and static pressure sensors according to claim 5, characterized in that, The atmospheric data computer is used to control the opening or closing of the first electrically controlled check valve based on the first current signal.

7. The system for heating the total and static pressure sensors according to claim 6, characterized in that, The atmospheric data computer receives the second pressure signal from the static pressure sensor through the static pressure pipeline and converts the second pressure signal into a second current signal.

8. The system for heating the total and static pressure sensors according to claim 7, characterized in that, The atmospheric data computer is used to control the opening or closing of the second electrically controlled check valve based on the second current signal.

9. The system for heating the total and static pressure sensors according to claim 8, characterized in that, The air data computer is used to control the opening or closing of the first electronically controlled check valve according to the received pilot instructions.

10. The system for heating the total and static pressure sensors according to claim 9, characterized in that, The air data computer is used to control the opening or closing of the second electronically controlled check valve according to the received pilot instructions.

11. The system for heating the total and static pressure sensors according to claim 1, characterized in that, The atmospheric data computer determines whether the heating status is normal by detecting the current signal of the total pressure sensor and / or static pressure sensor.

12. The system for heating the total and static pressure sensors according to claim 11, characterized in that, The atmospheric data computer sends a valve opening command to the electrically controlled check valve via an electrical signal.

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