Fuel oil measurement and control system and method with component fault positioning and pre-selection automatic refueling functions

Abstract

The invention belongs to the technical field of aircraft fuel system design, and discloses a fuel measurement and control system and method with component fault positioning and preselection automatic refueling functions, and the fuel measurement and control system comprises a C / V conversion module 1, a C / V conversion module 2, a fuel quantity measurement module, a communication module and a power supply module. By perfecting the function design of the fuel oil measuring and controlling system and the pressure refueling control box, the pre-refueling function of pressure refueling is added, and the refueling working efficiency is improved.

Description

Technical Field

[0001] The present invention belongs to the technical field of aircraft fuel system design, and specifically relates to a fuel measurement and control system and method for an aircraft fuel system with component fault location and pre-selected automatic refueling functions. Background Art

[0002] The fuel measurement and control system in the aircraft fuel system is used to measure the fuel tank, control the automatic transfer of fuel and issue corresponding warning signals. The system has a high failure rate during use, the fuel measurement and control system consists of many components, and the fault location cycle is long, which affects the aircraft maintenance cycle, reduces economy, and causes inconvenience to users; and according to different flight missions, refueling requires manual calculation and allocation of refueling volume values, monitoring of the oil volume change value on the refueling panel, and timely operation of the refueling switch on and off, which reduces work efficiency. Therefore, it is very important to study and improve the fuel measurement and control system, increase system self-checking, detect the working status of components in real time through self-checking, and increase the automatic allocation of pre-selected oil volume to the tank for automatic refueling. Summary of the invention

[0003] The present invention provides a fuel measurement and control system with component fault location and pre-selected automatic refueling functions for an aircraft fuel system, so as to solve at least one problem existing in the existing fuel measurement and control systems.

[0004] The technical solution of the present invention is achieved in this way:

[0005] A fuel measurement and control system with component fault location and pre-selected automatic refueling function, comprising:

[0006] C / V conversion module 1 receives detection signals from the left wing fuel measurement sensor and the temperature sensing component, and converts the capacitance value signal into a voltage value signal through internal calculation;

[0007] C / V conversion module 2 receives detection signals from the right wing fuel measurement sensor and the temperature sensing component, and converts the capacitance value signal into a voltage value signal through internal calculation;

[0008] The oil quantity measurement module obtains the voltage value signal, converts it into oil quantity information through calculation and processing, and outputs the oil quantity information to an external module / device;

[0009] The communication module sends the above fuel quantity information to the flight parameter equipment for recording;

[0010] The power module is mainly used to provide power support for the system.

[0011] As a further solution of the present invention: the external module / device is a pressure refueling control box and a fuel gauge.

[0012] As a further solution of the present invention: the pressure refueling control box transmits the preselected oil quantity to the fuel measurement and control system through the ARINC429 bus, and the fuel measurement and control system compares the preselected refueling quantity with the actual refueling quantity in the fuel tank; when the actual oil quantity in the fuel tank is less than the preselected oil quantity, a control signal for opening the fuel tank refueling valve is sent to the pressure refueling control box; when the actual oil quantity in the fuel tank is greater than the preselected oil quantity, a control signal for closing the fuel tank refueling valve is sent to the pressure refueling control box; the pressure refueling control box sends a closing / opening signal to each fuel tank refueling valve according to the control signal of the fuel measurement and control system, thereby realizing the automatic control function of pressure refueling.

[0013] As a further solution of the present invention: the fuel gauge screen displays the status of system components. When the fuel measurement and control system detects a system component failure, it sends component failure information to the fuel gauge, and the system component on the display screen changes from green to red.

[0014] As a further solution of the present invention: the information of each component displayed on the display screen is green signal points when the passage is normal, and the information of each component displayed when the passage is abnormal and a fault is detected is red signal points.

[0015] As a further solution of the present invention: the pre-selected fuel quantity refers to: setting the pressure refueling state selection knob to the "pre-selected" position, toggling the "pre-selected" switch, and based on the basic fuel quantity value preset by the system, when turning "+" upward, it continues to increase by a certain order of magnitude to the pre-selected refueling value, or when turning "-" downward, it continues to decrease by a certain order of magnitude to the pre-selected refueling value.

[0016] A fuel measurement and control method with component fault location and pre-selected automatic refueling function, comprising the following steps:

[0017] Receive the oil level and temperature detection signals of the two wings, and obtain the voltage value signal through C / V conversion;

[0018] Obtaining the voltage value signal, converting it into oil quantity information through calculation and processing, and outputting the oil quantity information externally;

[0019] Record the above oil quantity information;

[0020] By judging the above detection signal, fault detection of the measurement channel can be performed.

[0021] As a further solution of the present invention: it also includes a pre-selected automatic refueling step: after setting the pre-selected oil volume value, the pressure refueling state selection knob is placed in the "refueling" position, the normal pressure refueling program is started, and pressure refueling is performed.

[0022] The beneficial effects of this application are:

[0023] 1. The present invention designs a fuel measurement and control system with component fault location display and pressure refueling preselection functions on the basis of maintaining the original fuel tank fuel quantity measurement, full fuel signal, fuel tank fuel empty signal, remaining fuel alarm signal, and unbalanced fuel quantity alarm functions of the fuel measurement and control system of the fuel system. Compared with the original fuel measurement and control system, the fuel measurement and control system, pressure refueling control box, fuel quantity meter and other components in the system are mainly improved to realize the addition of two functional units of fuel measurement and control system component fault location monitoring and preselection automatic refueling.

[0024] 2. The present invention improves the functional design of the fuel measurement and control system, adds fault detection and display functions to various components of the fuel measurement and control system, and improves the usability and maintainability of the product.

[0025] 3. The present invention improves the functional design of the fuel measurement and control system and the pressure refueling control box, adds a pressure refueling pre-selection refueling function, and improves the refueling work efficiency.

[0026] The present application is further described in detail below in conjunction with the accompanying drawings of the embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a principle block diagram of the fuel measurement and control system with component fault location and pre-selected automatic refueling function of the present invention;

[0028] Figure 2 It is a component monitoring status display diagram displayed on a fuel gauge in a fuel measurement and control system with component fault location and pre-selected automatic refueling function of the present invention;

[0029] Figure 3 It is a diagram of the operation panel of the pressure refueling control box in the fuel measurement and control system with component fault location and pre-selected automatic refueling function of the present invention;

[0030] Figure 4 The diagram is a diagram of an operation panel of a fuel indication switch in a fuel measurement and control system with a component fault location and preselected automatic refueling function of the present invention. DETAILED DESCRIPTION

[0031] The technical solution of the present application will be described clearly and completely below in conjunction with the accompanying drawings of the embodiments.

[0032] Figures 1 to 4 It is a schematic diagram for explaining an embodiment of a fuel measurement and control system with component fault location and preselected automatic refueling function of the present invention.

[0033] In the first aspect, the present invention provides a fuel measurement and control system with component fault location and refueling preselection functions. Compared with the original fuel measurement and control system, two functional units of fault location monitoring and refueling preselection are mainly added.

[0034] The fuel computer adopts a highly modular design according to the function, input and output relationship. The fuel measurement and control system includes C / V conversion module 1, C / V conversion module 2, power module, fuel quantity measurement module and communication module. The power module provides power support for the fuel measurement and control system; C / V conversion module 1 converts the capacitance value and temperature information of the left wing fuel measurement sensor, temperature sensing component, etc. through internal calculation, and converts the capacitance value into a voltage value signal; C / V conversion module 2 converts the capacitance value and temperature information of the right wing fuel measurement sensor, temperature sensing component, etc. through internal calculation, and converts the capacitance value into a voltage value signal; the fuel quantity information of the converted voltage signal is sent to the fuel quantity measurement module, and the fuel quantity measurement module outputs it to the external module / equipment (pressure refueling control equipment and fuel quantity display equipment). The communication module sends the fuel quantity information sent by the fuel quantity measurement module to the flight parameter equipment for recording.

[0035] Corresponding test points are designed in each functional module, and through these test points in the functional modules, LRU tests can be performed by BIT or external test equipment to achieve the LRU fault detection and fault isolation requirements of system components. When the fuel measurement and control system is working, the C / V conversion module controls the excitation source signal to excite the capacitive sensors in each fuel tank. According to the characteristic data of each sensor stored in the non-volatile memory of the fuel measurement and control system, the signal output data of each sensor is judged, and the fault of each sensor measurement channel can be detected, and this detection is periodic. After identifying the fault of the sensor measurement channel, the fuel measurement and control system enables the standard measurement circuit and detection circuit of the forward measurement channel of the fuel measurement and control system to perform fuel quantity measurement forward channel fault detection to locate the fault of the measurement channel.

[0036] Will Figure 4 When the fuel indicator switch (device for checking the fuel gauge to display fuel information and status) is turned to CH (check / self-check) channel, the fuel gauge screen displays the status of system components. When the fuel measurement and control system detects a system component failure, it sends a component failure message to the fuel gauge, and the system components on the display screen change from green to red. The status display screen is as follows: Figure 2 The sensor failure modes are divided into open circuit and short circuit. When the path is normal, the information of each component displayed is a green (customizable color) signal point. When the path is abnormal and a fault is detected, the information of each component displayed is a red (customizable color) signal point.

[0037] The pressure refueling preselection operation is to Figure 3 The pressure refueling state selection knob is placed in the "pre-select" position, and the "pre-select" switch is toggled. Based on the system preset basic fuel value, the fuel value will continue to increase by a certain order of magnitude to the pre-selected refueling value when the "+" is turned upward, or will continue to decrease by a certain order of magnitude to the pre-selected refueling value when the "-" is turned downward. After setting the pre-selected fuel value, the pressure refueling state selection knob is placed in the "refueling" position, the normal pressure refueling procedure is started, and pressure refueling is performed.

[0038] The pressure refueling control box transmits the preselected fuel volume to the fuel measurement and control system through the ARINC429 bus, and the fuel measurement and control system compares the preselected fuel volume with the actual fuel volume in the fuel tank. When the actual fuel volume in the fuel tank is less than the preselected fuel volume, a control signal to open the fuel tank refueling valve is sent to the pressure refueling control box. When the actual fuel volume in the fuel tank is greater than the preselected fuel volume, a control signal to close the fuel tank refueling valve is sent to the pressure refueling control box. The pressure refueling control box sends a close / open signal to each fuel tank refueling valve according to the control signal of the fuel measurement and control system, thereby realizing the automatic control function of pressure refueling.

[0039] The fuel measurement and control system for an aircraft fuel system provided by the present invention improves the functional design of the fuel measurement and control system, adds the fault detection and display functions of the various components of the fuel measurement and control system, and improves the usability and maintainability of the product; and adds the pressure refueling preselection refueling function by improving the functional design of the fuel measurement and control system and the pressure refueling control box, thereby improving the refueling work efficiency.

[0040] In a second aspect, the present invention provides a fuel measurement and control method with component fault location and pre-selected automatic refueling function, which comprises the following steps:

[0041] Receive the oil level and temperature detection signals of the two wings, and obtain the voltage value signal through C / V conversion;

[0042] Obtaining the voltage value signal, converting it into oil quantity information through calculation and processing, and outputting the oil quantity information externally;

[0043] Record the above oil quantity information;

[0044] By judging the above detection signal, the fault of the measurement channel can be detected;

[0045] Pre-selected automatic refueling: After setting the pre-selected oil volume value, turn the pressure refueling state selection knob to the "refueling" position to start the normal pressure refueling procedure and perform pressure refueling.

[0046] So far, the purpose of the present invention has been achieved.

[0047] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A fuel measurement and control system with component fault location and pre-selected automatic refueling function, characterized in that: include: C / V conversion module 1 receives detection signals from the left wing fuel measurement sensor and the temperature sensing component, and converts the capacitance value signal into a voltage value signal through internal calculation; C / V conversion module 2 receives detection signals from the right wing fuel measurement sensor and the temperature sensing component, and converts the capacitance value signal into a voltage value signal through internal calculation; The oil quantity measurement module obtains the voltage value signal, converts it into oil quantity information through calculation and processing, and outputs the oil quantity information to an external module / device; The communication module sends the above fuel quantity information to the flight parameter equipment for recording; The power module is mainly used to provide power support for the system.

2. The fuel measurement and control system with component fault location and pre-selected automatic refueling function according to claim 1, characterized in that: The external modules / devices are a pressure refueling control box and a fuel gauge.

3. The fuel measurement and control system with component fault location and pre-selected automatic refueling function according to claim 2, characterized in that: The pressure refueling control box transmits the preselected fuel volume to the fuel measurement and control system through the ARINC429 bus, and the fuel measurement and control system compares the preselected fuel volume with the actual fuel volume in the fuel tank; when the actual fuel volume in the fuel tank is less than the preselected fuel volume, a control signal for opening the fuel tank refueling valve is sent to the pressure refueling control box; when the actual fuel volume in the fuel tank is greater than the preselected fuel volume, a control signal for closing the fuel tank refueling valve is sent to the pressure refueling control box; the pressure refueling control box sends a closing / opening signal to each fuel tank refueling valve according to the control signal of the fuel measurement and control system, thereby realizing the automatic control function of pressure refueling.

4. The fuel measurement and control system with component fault location and pre-selected automatic refueling function according to claim 3, characterized in that: The fuel gauge screen displays the status of system components. When the fuel measurement and control system detects a system component failure, it sends component failure information to the fuel gauge, and the system component on the display screen changes from green to red.

5. The fuel measurement and control system with component fault location and pre-selected automatic refueling function according to claim 4, characterized in that: In the display screen, when the passage is normal, the information of each component displayed is a green signal point, and when the passage is abnormal and a fault is detected, the information of each component displayed is a red signal point.

6. The fuel measurement and control system with component fault location and pre-selected automatic refueling function according to claim 3, characterized in that: The preselected fuel quantity means: put the pressure refueling state selection knob to the "preselected" position, turn the "preselected" switch, and based on the basic fuel quantity value preset by the system, it will continue to increase by a certain order of magnitude to the preselected refueling value when turned "+" upward, or continue to decrease by a certain order of magnitude to the preselected refueling value when turned "-" downward.

7. A fuel measurement and control method with component fault location and pre-selected automatic refueling function, characterized in that: The steps include: Receive the oil level and temperature detection signals of the two wings, and obtain the voltage value signal through C / V conversion; Obtaining the voltage value signal, converting it into oil quantity information through calculation and processing, and outputting the oil quantity information externally; Record the above oil quantity information; By judging the above detection signal, fault detection of the measurement channel can be performed.

8. The fuel measurement and control method with component fault location and pre-selected automatic refueling function according to claim 7, characterized in that: It also includes the steps of pre-selecting automatic refueling: after setting the pre-selected oil volume value, the pressure refueling state selection knob is placed in the "refueling" position, the normal pressure refueling procedure is started, and pressure refueling is performed.

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