Wireless quick access recorder and implementation method thereof

Abstract

The invention discloses a wireless fast access recorder and an implementation method thereof. According to the scheme, the wireless fast access recorder comprises a radio frequency signal processing module; the radio frequency signal processing module comprises a radio frequency interlocking circuit, a local power supply circuit, a wireless communication circuit, a user identification card unit, an antenna combiner and an antenna unit; the radio frequency interlocking circuit is connected with the local power supply circuit and is used for controlling a switch of the local power supply circuit; the local power supply circuit is connected with the wireless communication circuit and is used for supplying power to the wireless communication circuit; the wireless communication circuit is respectively connected with the user identification card unit and the antenna combiner and is used for carrying out wireless communication on the user identification card unit through the antenna combiner; and the antenna combiner is connected with the antenna unit and is used for fusing the communication channels and receiving or sending wireless communication signals through the wireless unit. According to the embodiment of the invention, the safety of flight data processing can be improved, and the method can be widely applied to the field of aviation airborne equipment.

Description

Technical Field

[0001] The present application relates to the technical field of aviation airborne equipment, and in particular to a wireless quick access recorder and an implementation method thereof. Background Art

[0002] With the development of civil aviation technology, the degree of comprehensive integration of aviation airborne equipment is getting higher and higher. In the related technology, the wireless quick access recorder (WQAR) of civil aircraft has the disadvantages of poor wireless communication and poor maintainability. In summary, the technical problems existing in the related technology need to be improved. Summary of the invention

[0003] The main purpose of the embodiments of the present application is to propose a wireless quick access recorder and an implementation method thereof, which can improve the safety of flight data processing.

[0004] To achieve the above-mentioned purpose, an embodiment of the present application provides a wireless quick access recorder in one aspect, wherein the wireless quick access recorder includes a radio frequency signal processing module; the radio frequency signal processing module includes a radio frequency interlocking circuit, a local power supply circuit, a wireless communication circuit, a user identification card unit, an antenna combiner and an antenna unit;

[0005] The radio frequency interlocking circuit is connected to the local power supply circuit and is used to control the switch of the local power supply circuit;

[0006] The local power supply circuit is connected to the wireless communication circuit and is used to supply power to the wireless communication circuit;

[0007] The wireless communication circuit is connected to the user identification card unit and the antenna combiner respectively, and is used for wirelessly communicating with the user identification card unit through the antenna combiner;

[0008] The antenna combiner is connected to the antenna unit, and is used to combine the communication channels, and receive or send wireless communication signals through the wireless unit.

[0009] In some embodiments, the radio frequency interlock circuit includes a power supply unit, a discrete quantity acquisition interface unit, a logic control circuit unit, and a power on / off unit;

[0010] The power supply unit is connected to the discrete quantity acquisition interface unit and is used to supply power to the logic control circuit unit;

[0011] The discrete quantity acquisition interface unit is connected to the logic control circuit unit, and is used to receive the discrete signal quantity input from the outside, and convert the discrete signal quantity into the input signal of the logic control circuit unit;

[0012] The logic control circuit unit is connected to the power on / off unit and is used to generate a power on / off signal according to the input signal;

[0013] The power on / off unit is connected to the local power circuit and is used to perform on / off control on the local power circuit according to the power on / off signal.

[0014] In some embodiments, the power supply unit includes a low voltage dropout linear regulator and a bypass capacitor.

[0015] In some embodiments, the discrete quantity acquisition interface unit includes a first discrete signal acquisition circuit and a second discrete signal acquisition circuit, the first discrete signal acquisition circuit and the second discrete signal acquisition circuit are connected in parallel, the first discrete signal acquisition circuit includes a comparator, the second discrete signal acquisition circuit includes a pull-up resistor and a low-pass filter, one end of the pull-up resistor is connected to the input voltage, and the other end is respectively connected to the signal input end and the low-pass filter.

[0016] In some embodiments, the logic control circuit unit includes an XOR gate circuit, an XOR gate circuit and an inverter circuit, the XOR gate circuit includes a first XOR gate unit, a second XOR gate unit, a third XOR gate unit and a fourth XOR gate unit, the XOR gate circuit includes a first XOR gate unit, a second XOR gate unit, a third XOR gate unit and a fourth XOR gate unit, the inverter circuit includes a first inverter and a second inverter, the first XOR gate unit is connected in parallel with the second XOR gate unit, the third XOR gate unit and the fourth XOR gate unit, the output end of the first XOR gate unit is connected to the first input end of the first XOR gate unit, and the output end of the second XOR gate unit is connected to the first input end of the first XOR gate unit. The output end of the first XOR gate unit is connected to the second input end of the first XOR gate unit, the output end of the third XOR gate unit is connected to the first input end of the second XOR gate unit, the output end of the fourth XOR gate unit is connected to the second input end of the second XOR gate unit, the output end of the first XOR gate unit is connected to the first input end of the third XOR gate unit, the output end of the second XOR gate unit is connected to the second input end of the third XOR gate unit, the output end of the third XOR gate unit is connected to the first input end of the fourth XOR gate unit, the first inverter is connected to the output end of the fourth XOR gate unit, and the second inverter is connected to the first input end of the fourth XOR gate.

[0017] In some embodiments, the power on / off unit includes a first switch tube, a second switch tube and a third switch tube, the gate of the first switch tube is connected to the output end of the logic control circuit unit, the drain of the first switch tube is connected to the ground end, the source of the first switch tube is connected to the gate of the second switch tube and the gate of the third switch tube, the source of the second switch tube is connected to the voltage end, the drain of the second switch tube is connected to the drain of the third switch tube, and the source of the third switch tube is connected to the ground end.

[0018] In some embodiments, the radio frequency interlock circuit further includes a voltage monitoring unit, and the voltage monitoring unit is used to monitor the input voltage.

[0019] In some embodiments, the radio frequency interlocking circuit further includes a redundant backup unit, the output end of the redundant backup unit is connected to the input end of the discrete quantity acquisition interface unit, and is used to perform redundant backup of external input discrete signal quantities.

[0020] In some embodiments, the wireless quick access recorder further includes a liquid crystal display module, function buttons and a fault indicator light.

[0021] To achieve the above-mentioned purpose, another aspect of the embodiment of the present application provides a data collection and transmission method for a wireless quick access recorder, which is applied to a wireless quick access recorder as described above, and the method comprises:

[0022] Get external discrete semaphore;

[0023] The switch of the local power supply circuit is controlled according to the external discrete signal quantity, and when the switch of the local power supply circuit is in an on state, a wireless signal is acquired through a wireless communication circuit for data transmission.

[0024] The embodiments of the present application include at least the following beneficial effects: The present application provides a wireless quick access recorder and an implementation method thereof, wherein the wireless quick access recorder includes a radio frequency signal processing module; the radio frequency signal processing module includes a radio frequency interlocking circuit, a local power supply circuit, a wireless communication circuit, a user identification card unit, an antenna combiner and an antenna unit; the radio frequency interlocking circuit is connected to the local power supply circuit for controlling the switch of the local power supply circuit; the local power supply circuit is connected to the wireless communication circuit for powering the wireless communication circuit; the wireless communication circuit is respectively connected to the user identification card unit and the antenna combiner for wireless communication with the user identification card unit through the antenna combiner; the antenna combiner is connected to the antenna unit for fusing the communication channel and receiving or sending wireless communication signals through the wireless unit. The embodiments of the present application receive external signals for power supply control through the radio frequency interlocking circuit in the radio frequency signal processing module, and can cut off the power supply of the radio frequency transmitting module during flight, thereby improving the safety of flight data processing. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a structural schematic diagram of a wireless quick access recorder provided in an embodiment of the present application;

[0026] Figure 2 It is a structural schematic diagram of a radio frequency interlocking circuit provided in an embodiment of the present application;

[0027] Figure 3 is a structural schematic diagram of a power supply unit provided in an embodiment of the present application;

[0028] Figure 4 It is a structural schematic diagram of a discrete quantity acquisition interface unit provided in an embodiment of the present application;

[0029] Figure 5 is a structural schematic diagram of a logic control circuit unit provided in an embodiment of the present application;

[0030] Figure 6 It is a structural schematic diagram of a power on / off unit provided in an embodiment of the present application;

[0031] Figure 7 It is a structural schematic diagram of a voltage monitoring unit provided in an embodiment of the present application. DETAILED DESCRIPTION

[0032] In order to make the purpose, technical solutions and advantages of the present application clearer, the present application is further described in detail below in conjunction with the accompanying drawings and examples. It should be understood that the specific embodiments described herein are only used to explain the present application and are not intended to limit the present application. When the following description refers to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the embodiments of the present application. They are only examples of devices and methods consistent with some aspects of the embodiments of the present application as detailed in the attached claims.

[0033] It is understood that the terms "first", "second", etc. used in this application can be used to describe various concepts in this article, but unless otherwise specified, these concepts are not limited by these terms. These terms are only used to distinguish one concept from another concept. For example, without departing from the scope of the embodiment of the present application, the first information may also be referred to as the second information, and similarly, the second information may also be referred to as the first information. Depending on the context, the words "if" and "if" as used herein can be interpreted as "at the time of" or "when" or "in response to determination".

[0034] The terms "at least one", "multiple", "each", "any", etc. used in this application, at least one includes one, two or more, multiple includes two or more, each refers to each of the corresponding multiple, and any refers to any one of the multiple.

[0035] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which this application belongs. The terms used herein are only for the purpose of describing the embodiments of this application and are not intended to limit this application.

[0036] With the development of civil aviation technology, the degree of comprehensive integration of aviation airborne equipment is getting higher and higher. Performance monitoring and predictive maintenance of aircraft systems are important links to ensure safe operation of aircraft and reduce maintenance costs. The requirements for the speed and timeliness of fault location and trend analysis are also getting higher and higher. It is also necessary to integrate multiple functions such as collecting various flight data of aircraft, such as navigation data, longitudinal roll data, instructions and sensor data. Remote real-time data collection through wireless fast access recorders is sent to ground operation control, safety supervision and maintenance engineering departments for aircraft status monitoring and post-flight analysis, which can effectively and quickly improve the fault diagnosis ability of aircraft. At present, civil aircraft WQAR and its related equipment are expensive, the number of interfaces is not rich, the product technology is backward, the scalability is low, the product robustness is low, the maintainability is poor, and the product application scenarios are limited.

[0037] In view of this, a wireless quick access recorder is provided in an embodiment of the present application, in which the wireless quick access recorder includes a radio frequency signal processing module; the radio frequency signal processing module includes a radio frequency interlocking circuit, a local power supply circuit, a wireless communication circuit, a user identification card unit, an antenna combiner and an antenna unit; the radio frequency interlocking circuit is connected to the local power supply circuit for controlling the switch of the local power supply circuit; the local power supply circuit is connected to the wireless communication circuit for powering the wireless communication circuit; the wireless communication circuit is respectively connected to the user identification card unit and the antenna combiner for wireless communication with the user identification card unit through the antenna combiner; the antenna combiner is connected to the antenna unit for fusing the communication channel and receiving or sending wireless communication signals through the wireless unit. The embodiment of the present application receives an external signal for power supply control through the radio frequency interlocking circuit in the radio frequency signal processing module, and can cut off the power supply of the radio frequency transmitting module during flight, thereby improving the safety of flight data processing.

[0038] Figure 1 1 is a schematic diagram of the structure of a wireless quick access recorder provided in an embodiment of the present application, wherein the wireless quick access recorder comprises a radio frequency signal processing module; the radio frequency signal processing module comprises a radio frequency interlocking circuit, a local power supply circuit, a wireless communication circuit, a user identification card unit, an antenna combiner and an antenna unit;

[0039] The radio frequency interlocking circuit is connected to the local power supply circuit and is used to control the switch of the local power supply circuit;

[0040] The local power supply circuit is connected to the wireless communication circuit and is used to supply power to the wireless communication circuit;

[0041] The wireless communication circuit is connected to the user identification card unit and the antenna combiner respectively, and is used for wirelessly communicating with the user identification card unit through the antenna combiner;

[0042] The antenna combiner is connected to the antenna unit, and is used to combine the communication channels, and receive or send wireless communication signals through the wireless unit.

[0043] In an embodiment of the present application, the wireless quick access recorder includes a radio frequency signal processing module, wherein the radio frequency signal processing module includes a radio frequency interlocking circuit, a local power supply circuit, a wireless communication circuit, a user identification card unit, an antenna combiner and an antenna unit; the radio frequency interlocking circuit is connected to the local power supply circuit for controlling the switch of the local power supply circuit; the local power supply circuit is connected to the wireless communication circuit for powering the wireless communication circuit; the wireless communication circuit is respectively connected to the user identification card unit and the antenna combiner for wireless communication with the user identification card unit through the antenna combiner; the antenna combiner is connected to the antenna unit for fusing the communication channel and receiving or sending wireless communication signals through the wireless unit. The radio frequency signal processing module realizes the radio frequency interlocking function through the radio frequency interlocking circuit. The radio frequency signal processing module has 4 wireless network module slots. The wireless communication circuit is installed in these 4 slots. It can support mixed insertion of multiple wireless communication formats, which is convenient for replacing and upgrading modules of other formats in the future. Each module can be managed independently. The wireless communication circuit uses a 4G full-standard module. The module uses Quectel's EG25-G. EG25-G is a full-network LTE cat4 wireless communication module. It uses multiple-input multiple-output (MIMO) technology to improve the data rate and connection reliability of the wireless communication system; it supports DFOTA and DTMF functions. The device can access the global Internet (I nternet) through the wireless communication module. EG25-G can support 4GTDD LTE, FDD LTE, and is backward compatible with 3G (UTMS / WCDMA, HSPA, HSPA+, DCHS DPA), 2G (GSM, GPRS, EDGE). The device gives priority to 4G mode high-speed transmission during transmission, and selects 3G mode when 4G signal is not available. Therefore, the 4G module needs to provide support for 2G mode. The 2G mode is mainly used in remote areas without 4 / 3G coverage. In 4G mode (LTECAT4), the maximum downlink rate can reach 150Mbps, and the maximum upload rate is 50Mbps. It supports full-duplex communication in 4G, 3G and 2G modes. EG25-G uses a module to connect to the PS through a serial port and a USB interface. The serial port is used for debugging and troubleshooting, and the USB interface is used to transmit data and send AT commands. It can transmit data to the ground station through a wireless communication circuit.

[0044] In the embodiment of the present application, the antenna unit is a detachable antenna. In some embodiments, the antenna unit is provided with two antennas for transmitting or receiving wireless radio frequency signals, which can ensure that the wireless quick access recorder is installed in the equipment compartment inside the aircraft shell and can communicate with the outside. In a feasible embodiment, the detachable antenna is mainly used for wireless communication module communication. The number of antennas is 2, which are respectively connected to the output ends of two antenna combiners, which can ensure that the WQAR is installed in the equipment compartment inside the aircraft shell and can communicate with the outside. The antenna is installed on the outside of the front panel of the device. The user can remove the antenna at the front panel without tools for replacement or other maintenance work. It should be noted that the user identification card unit of the embodiment of the present application is a pluggable SIM card (user identification card) unit: it contains 4 SIM card sockets, and can install up to 4 SIM cards, which are used for 4 4G subunits respectively. The unit can be plugged in and out through the front panel, which is convenient for users to replace SIM cards. The pluggable SIM card module consists of a SIM card socket, ESD protection devices, a module connector, and a base connector. The pluggable SIM card module is used to carry the SIM card required by the 4G module. There are 4 card holders, each corresponding to the 4G block SIM card interface to which it belongs. Users can replace the SIM cards of a single or multiple modules separately. ESD devices are used to protect the card holder and the module, and each SIM has an in-place signal and is led to the PS. The PS can detect whether the SIM card is in place by detecting the status of the signal. The pluggable SIM card module is installed on the RF signal processing module, and is electrically connected to the RF signal processing module through the base connector. At the same time, a hole is opened on the front panel, and the user can plug and unplug, lock / unlock the pluggable SIM card module from the front panel, making it convenient for users to replace SIM cards.

[0045] In addition, for WQAR, due to the built-in 4 wireless communication modules, 4 antennas are theoretically required (only the main antenna is connected), but due to the space limitation of the front panel, an antenna combiner is needed to reduce the number of antennas. If a four-input and one-output antenna combiner is used, the insertion loss in the receiving direction is too large, and it is difficult to make up for it through the gain of the antenna. Therefore, WQAR adopts a two-input and one-output antenna combiner, so as to balance the number of antennas and system performance. The built-in 4 wireless communication modules can simultaneously transmit data in full-duplex, which can greatly improve the data transmission efficiency. Therefore, the embodiment of the present application adopts 4 full-network 4G modules, which are synthesized by two combiners with excellent S parameter performance indicators, so that the number of WQAR antennas is reduced by 1 times, and the crosstalk between channels is effectively suppressed. The full-band antenna with excellent standing wave ratio and high gain is adopted to make the communication distance farther and the out-of-band spurious is small, so as to meet the DO-160 identification test. The use of four 4G full network access modules is conducive to forming a large-capacity channel by aggregating multiple channels, and realizing large-bandwidth, large-capacity, and highly stable communication transmission through multi-channel fusion, thus making up for the communication bottleneck of low 4G bandwidth.

[0046] In some embodiments, the radio frequency interlock circuit includes a power supply unit, a discrete quantity acquisition interface unit, a logic control circuit unit, and a power on / off unit;

[0047] The power supply unit is connected to the discrete quantity acquisition interface unit and is used to supply power to the logic control circuit unit;

[0048] The discrete quantity acquisition interface unit is connected to the logic control circuit unit, and is used to receive the discrete signal quantity input from the outside, and convert the discrete signal quantity into the input signal of the logic control circuit unit;

[0049] The logic control circuit unit is connected to the power on / off unit and is used to generate a power on / off signal according to the input signal;

[0050] The power on / off unit is connected to the local power circuit and is used to perform on / off control on the local power circuit according to the power on / off signal.

[0051] In the embodiment of the present application, the radio frequency interlock circuit includes a power supply unit, a discrete quantity acquisition interface unit, a logic control circuit unit and a power on / off unit. Figure 2, the discrete quantity acquisition interface unit is used to change the discrete quantity. A redundant circuit can be connected to the input end of the discrete quantity acquisition interface unit, and a logic decoding circuit, i.e., a logic control circuit unit, can be connected to the output end of the discrete quantity acquisition interface unit to control the switch of the local power supply circuit through the power switch circuit. In addition, the embodiment of the present application can also set multiple sub-circuits of the power switch circuit, such as power switch circuit 1 and power switch circuit 2, for power switch control of different devices. One end of the power supply unit is connected to the external power bus, and the other end is connected to the logic control circuit unit to supply power to the logic control circuit unit. One end of the discrete quantity acquisition interface unit is connected to the discrete signal quantity input externally, and the other end is connected to the logic control circuit unit. The discrete signal quantity input externally may include aircraft air-ground signals, cabin door signals, or engine signals. The logic control circuit unit is connected to the local power supply circuit to control the switch of the local power supply circuit, that is, the on and off of the local power supply can be controlled. The RF interlock circuit receives 4 external discrete inputs, 4 jumper selection inputs and an RF override input discrete quantity, which is converted into a signal that matches the input voltage of the logic circuit through a level conversion circuit. It can be connected to the aircraft air-to-ground signal, cabin door signal or engine signal. When it is determined that the flight status of the aircraft reaches the predetermined conditions (for example, the aircraft lands, the engine is shut down, and after 5 minutes), it is used to control the power supply of the wireless transmission module, so that the wireless rapid transcription recorder transmits data to the ground base station in an appropriate state after the aircraft lands, and turns off the wireless transmission function when the aircraft is ready to take off, to prevent wireless transmission from interfering with and affecting the on-board communication. The RFoverr ide signal is used to override the RF interlock circuit. When the discrete signal is grounded, the cellular wireless communication control interlock circuit is enabled, and there is no wireless communication transmission signal, thereby improving the safety of the flight.

[0052] In some embodiments, the power supply unit includes a low voltage dropout linear regulator and a bypass capacitor.

[0053] In the embodiments of this application, please refer to Figure 3 The power supply unit is composed of a low-voltage dropout linear regulator U1, multiple bypass capacitors and filter beads, among which the bypass capacitors include CE7, C1, C58, C2, C3, C4, C5, C6, and the filter bead FB1. The low-voltage dropout linear regulator can use the TPS73733QDRBRQ1 rail-grade chip. The label under each capacitor is the capacity, rated voltage and accuracy of the capacitor. For example, the label of the CE1 capacitor (220uF, 10V, 5%) indicates that the capacity of the capacitor is 10 microfarads, the maximum operating voltage is 10 volts, and its actual capacity may fluctuate between 209uF and 231uF. The power supply unit converts the +5VDC input from the external power bus into +3.3VDC and supplies it to each integrated circuit of the logic control circuit unit.

[0054] In some embodiments, the discrete quantity acquisition interface unit includes a first discrete signal acquisition circuit and a second discrete signal acquisition circuit, the first discrete signal acquisition circuit and the second discrete signal acquisition circuit are connected in parallel, the first discrete signal acquisition circuit includes a comparator, the second discrete signal acquisition circuit includes a pull-up resistor and a low-pass filter, one end of the pull-up resistor is connected to the input voltage, and the other end is respectively connected to the signal input end and the low-pass filter.

[0055] In the embodiments of this application, please refer to Figure 4 The discrete quantity acquisition interface unit includes a first discrete signal acquisition circuit and a second discrete signal acquisition circuit, wherein the first discrete signal acquisition circuit is composed of a comparator U7 and its peripheral circuits, and the peripheral circuits include resistors R16, R15, R14, R13, R12 and capacitor C1, and the mark under each resistor is the resistance value, precision and rated power of the resistor, such as the mark (7.50K, 1%, 0.5W) of resistor R15 indicates that the resistance value of the resistor is 7.5 kilo-ohms, the precision is ±1% and the rated power is 0.5 watts. The second discrete signal acquisition circuit is composed of a pull-up resistor R18 and a low-pass filter, wherein the low-pass filter is composed of a resistor R17 and a capacitor C2, one end of the pull-up resistor is connected to the input voltage, and the other end is respectively connected to the signal input end and the low-pass filter, that is, one end of the pull-up resistor is connected to one end of the resistor R17, the other end of the resistor R17 is connected to one end of the capacitor C2, and the other end of the capacitor C2 is connected to the ground. The embodiment of the present application receives a discrete signal quantity input from the outside through a discrete quantity acquisition interface unit, and converts it into a signal that adapts to the input voltage of the logic circuit.

[0056] In some embodiments, the logic control circuit unit includes an XOR gate circuit, an XOR gate circuit and an inverter circuit, the XOR gate circuit includes a first XOR gate unit, a second XOR gate unit, a third XOR gate unit and a fourth XOR gate unit, the XOR gate circuit includes a first XOR gate unit, a second XOR gate unit, a third XOR gate unit and a fourth XOR gate unit, the inverter circuit includes a first inverter and a second inverter, the first XOR gate unit is connected in parallel with the second XOR gate unit, the third XOR gate unit and the fourth XOR gate unit, the output end of the first XOR gate unit is connected to the first input end of the first XOR gate unit, and the output end of the second XOR gate unit is connected to the first input end of the first XOR gate unit. The output end of the first XOR gate unit is connected to the second input end of the first XOR gate unit, the output end of the third XOR gate unit is connected to the first input end of the second XOR gate unit, the output end of the fourth XOR gate unit is connected to the second input end of the second XOR gate unit, the output end of the first XOR gate unit is connected to the first input end of the third XOR gate unit, the output end of the second XOR gate unit is connected to the second input end of the third XOR gate unit, the output end of the third XOR gate unit is connected to the first input end of the fourth XOR gate unit, the first inverter is connected to the output end of the fourth XOR gate unit, and the second inverter is connected to the first input end of the fourth XOR gate.

[0057] In the embodiment of the present application, the logic control circuit unit generates a corresponding RF power supply on-off signal according to the input of the external discrete quantity, and is composed of 74 series logic devices U1 (XOR gate), U2 (XOR gate) and U3 (inverter). It does not contain any programmable devices inside, so there is no black box in this part of the unit, and its input-output correspondence is clear and unique. The external discrete quantity is converted and processed by the discrete quantity acquisition interface unit, and the two discrete quantity signals RF IL[1..4]A and RFI SEL[1..4]A can be used to generate the RF_ENA signal through this part of the circuit. The RF_ENA signal is the RF power supply on-off signal, which drives the power on-off unit at the back end. When any one or more devices among U1, U2, and U3 fail, the RF_ENA signal is at a low level or in a high impedance state, and will not turn on the power on-off unit at the back end. It can be imagined that the embodiment of the present application can also use a device with a Schmitt trigger as the input to prevent the generation of glitch levels at the output end, thereby ensuring the stability of the output end. Please refer to Figure 5 The logic control circuit unit includes an XOR gate circuit, an XOR gate circuit and an inverter circuit. The XOR gate circuit includes a first XOR gate unit U1A, a second XOR gate unit U1B, a third XOR gate unit U1C and a fourth XOR gate unit U1D. The XOR gate circuit includes a first XOR gate unit U2A, a second XOR gate unit U2B, a third XOR gate unit U2C and a fourth XOR gate unit U2D. The inverter circuit includes a first inverter U3A and a second inverter U3B.

[0058] In some embodiments, the power on / off unit includes a first switch tube, a second switch tube and a third switch tube, the gate of the first switch tube is connected to the output end of the logic control circuit unit, the drain of the first switch tube is connected to the ground end, the source of the first switch tube is connected to the gate of the second switch tube and the gate of the third switch tube, the source of the second switch tube is connected to the voltage end, the drain of the second switch tube is connected to the drain of the third switch tube, and the source of the third switch tube is connected to the ground end.

[0059] In the examples of this application, please refer to Figure 6 The power on / off unit is controlled by the logic control circuit unit and can turn on or off the power supply of the RF circuit. It consists of a first switch tube Q5, a second switch tube Q6, a third switch tube Q7 and its peripheral circuits, and the peripheral circuits include resistors R117, R118, R119, R120, R121, R122 and R123, diodes D8 and D9, capacitors C42, C43 and C44. When the RF_ENA signal is high, Q7 is turned on. At this time, the Vgs of the main switch tube Q5 reaches the threshold voltage, so that the switch is turned on and the circuit module is powered. Vgs refers to the voltage actually applied between the gate and the source. The main switch uses an enhanced P-channel MOSFET tube, whose threshold voltage Vgs (th) is a negative voltage. The main switch tube can only be turned on when the external power supply is normal (that is, its source voltage) and Vgs reaches the turn-on condition. When the front-end circuit fails, the RF_ENA signal is generally low (output short circuit) or open (high impedance state). At this time, the main switch tube is cut off to ensure that the RF circuit power supply will not be accidentally turned on.

[0060] In some embodiments, the radio frequency interlock circuit further includes a voltage monitoring unit, and the voltage monitoring unit is used to monitor the input voltage.

[0061] In the embodiment of the present application, the voltage monitoring unit is responsible for monitoring the +5V power supply and the +3.3V power supply status. Figure 7This part of the power supply mainly consists of two parts. The first part consists of comparator U16 and inverter U18 and their peripheral circuits. The peripheral circuits include resistors R68, R69, R70, R71 and R72, capacitors C23, C24, C25 and C26, inverters U18A and U18B, and diode D1. The voltage monitoring unit of the first part is used to monitor the +5V voltage. When the input voltage (+5V0) is greater than 4.7V, PSFAI LA is high level, and when it is less than 4.5V, PSFAI LA is low level; the second part is composed of comparator U19 and inverter U20 and their peripheral circuits, which include resistors R73, R74, R75, R76, R77 and R78, capacitors C27, C28, C29 and C30, inverters U20A and U20B, and diode D2. The voltage monitoring unit of the second part is used to monitor +3.3V voltage. When the input voltage (+3V3DCA) is greater than 3V, PWRONA is high level, and when it is less than 2.8V, PWRONA is low level.

[0062] In some embodiments, the radio frequency interlocking circuit further includes a redundant backup unit, the output end of the redundant backup unit is connected to the input end of the discrete quantity acquisition interface unit, and is used to perform redundant backup of external input discrete signal quantities.

[0063] In the embodiment of the present application, the radio frequency interlock circuit can also be provided with a redundant backup unit, which is used to perform redundant backup for the external input of the component to prevent a device on the signal path of a discrete quantity input from being damaged and causing an erroneous decoding result. The discrete quantity input from the rear connector is divided into two in the redundant backup unit and isolated by the same diode and the same safety capacitor for EMC filtering.

[0064] In some embodiments, the wireless quick access recorder further includes a liquid crystal display module, function buttons and a fault indicator light.

[0065] In the embodiment of the present application, the wireless quick access recorder also includes a display button module, which includes a liquid crystal display module, a function button and a fault indicator light. Among them, the display button module is installed on the front panel, which is used to display key system information and provide buttons for users to turn pages, select menus and other operations. It is specifically composed of a liquid crystal display module, four function buttons and a fault indicator light. The LCD screen is used for system settings, displaying wireless transmission status, other WQAR function status and BI T (built-in self-test) fault information. It is a character LCD screen with a display size of 4×20 characters. The display content is output through the SPI interface (serial peripheral interface) of the PS (processing system); the fault indicator light is yellow, and it is always on when the device and data card status are abnormal, and it is off when it is normal. The display button module is connected to the acquisition processing board through a flexible cable.

[0066] The following is a detailed description of the embodiments of the present invention with reference to specific application examples:

[0067] The embodiments of the present application can be applied to airborne system parameter collectors, civil aircraft data processing equipment, civil aircraft data real-time monitoring / flight status identification equipment, engine and aircraft status monitoring data management equipment, aircraft status monitoring and post-flight analyzers and other airborne equipment. The wireless quick access recorder of the embodiment of the present application includes a radio frequency signal processing module; the radio frequency signal processing module includes a radio frequency interlocking circuit, a local power supply circuit, a wireless communication circuit, a user identification card unit, an antenna combiner and an antenna unit; the radio frequency interlocking circuit is connected to the local power supply circuit for controlling the switch of the local power supply circuit; the local power supply circuit is connected to the wireless communication circuit for powering the wireless communication circuit; the wireless communication circuit is respectively connected to the user identification card unit and the antenna combiner for wireless communication with the user identification card unit through the antenna combiner; the antenna combiner is connected to the antenna unit for fusing the communication channel and receiving or sending wireless communication signals through the wireless unit. The wireless quick access recorder supports 4G / 3G / 2G cellular wireless network communications, can support duplex modes such as 4G TDD LTE, FDD LTE, and is backward compatible with 3G (UTMS / WCDMA, HSPA, HSPA+, DCHS DPA), 2G (GSM, GPRS, EDGE). The device gives priority to 4G mode high-speed transmission during transmission, and selects 3G mode when 4G signal is not available. When 4G / 3G is not available, 2G mode is selected. In addition, the wireless quick access recorder in the embodiment of the present application has a radio frequency interlocking function, and interlocking logic judgment is performed through 4 external discrete quantity inputs, 4 jumper selection inputs and an RF override input discrete quantity. When the working abnormal conditions are met, the fuse function is activated and the fuse is blown. Once the fuse is blown, the radio frequency interlocking circuit will completely cut off the power supply of the radio frequency transmitting module.

[0068] The present application also provides a data collection method for a wireless quick access recorder, which is applied to a wireless quick access recorder as described above, and the method includes:

[0069] Get external discrete semaphore;

[0070] The switch of the local power supply circuit is controlled according to the external discrete signal quantity, and when the switch of the local power supply circuit is in an on state, a wireless signal is acquired through a wireless communication circuit for data transmission.

[0071] It can be understood that the contents of the above-mentioned device embodiments are all applicable to the present method embodiments, the functions specifically implemented by the present method embodiments are the same as those of the above-mentioned device embodiments, and the beneficial effects achieved are also the same as those achieved by the above-mentioned device embodiments.

[0072] The embodiment of the present application provides a wireless quick access recorder and its implementation method. In the scheme, the wireless quick access recorder includes a radio frequency signal processing module; the radio frequency signal processing module includes a radio frequency interlocking circuit, a local power supply circuit, a wireless communication circuit, a user identification card unit, an antenna combiner and an antenna unit; the radio frequency interlocking circuit is connected to the local power supply circuit for controlling the switch of the local power supply circuit; the local power supply circuit is connected to the wireless communication circuit for powering the wireless communication circuit; the wireless communication circuit is respectively connected to the user identification card unit and the antenna combiner for wireless communication with the user identification card unit through the antenna combiner; the antenna combiner is connected to the antenna unit for fusing the communication channel and receiving or sending wireless communication signals through the wireless unit. The embodiment of the present application receives an external signal for power supply control through the radio frequency interlocking circuit in the radio frequency signal processing module, and can cut off the power supply of the radio frequency transmitting module during flight, thereby improving the safety of flight data processing.

[0073] The embodiments described in the embodiments of the present application are intended to more clearly illustrate the technical solutions of the embodiments of the present application and do not constitute a limitation on the technical solutions provided in the embodiments of the present application. Those skilled in the art will appreciate that with the evolution of technology and the emergence of new application scenarios, the technical solutions provided in the embodiments of the present application are also applicable to similar technical problems.

[0074] Those skilled in the art will appreciate that the technical solutions shown in the figures do not constitute a limitation on the embodiments of the present application, and may include more or fewer steps than shown in the figures, or a combination of certain steps, or different steps.

[0075] The device embodiments described above are merely illustrative, and the units described as separate components may or may not be physically separated, that is, they may be located in one place or distributed on multiple network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0076] Those skilled in the art will appreciate that all or some of the steps in the methods disclosed above, and the functional modules / units in the systems and devices may be implemented as software, firmware, hardware, or a suitable combination thereof.

[0077] The terms "first", "second", "third", "fourth", etc. (if any) in the specification of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchangeable where appropriate, so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device comprising a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0078] It should be understood that in the present application, "at least one (item)" means one or more, and "plurality" means two or more. "And / or" is used to describe the association relationship of associated objects, indicating that three relationships may exist. For example, "A and / or B" can mean: only A exists, only B exists, and A and B exist at the same time, where A and B can be singular or plural. The character " / " generally indicates that the objects associated before and after are in an "or" relationship. "At least one of the following" or similar expressions refers to any combination of these items, including any combination of single or plural items. For example, at least one of a, b or c can mean: a, b, c, "a and b", "a and c", "b and c", or "a and b and c", where a, b, c can be single or multiple.

[0079] In the several embodiments provided in the present application, it should be understood that the disclosed devices and methods can be implemented in other ways. For example, the device embodiments described above are only schematic. For example, the division of the above units is only a logical function division. There may be other division methods in actual implementation, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of devices or units, which can be electrical, mechanical or other forms.

[0080] The units described above as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0081] In addition, each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit. The above-mentioned integrated unit may be implemented in the form of hardware or in the form of software functional units.

[0082] The preferred embodiments of the present invention are described above with reference to the accompanying drawings, but the scope of the rights of the present invention is not limited thereto. Any modification, equivalent substitution and improvement made by a person skilled in the art without departing from the scope and essence of the present invention should be within the scope of the rights of the present invention.

Claims

1. A wireless quick access recorder, characterized in that: The wireless quick access recorder includes a radio frequency signal processing module; the radio frequency signal processing module includes a radio frequency interlocking circuit, a local power supply circuit, a wireless communication circuit, a user identification card unit, an antenna combiner and an antenna unit; The radio frequency interlocking circuit is connected to the local power supply circuit and is used to control the switch of the local power supply circuit; The local power supply circuit is connected to the wireless communication circuit and is used to supply power to the wireless communication circuit; The wireless communication circuit is connected to the user identification card unit and the antenna combiner respectively, and is used for wirelessly communicating with the user identification card unit through the antenna combiner; The antenna combiner is connected to the antenna unit, and is used to combine the communication channels, and receive or send wireless communication signals through the wireless unit.

2. The wireless quick access recorder according to claim 1, characterized in that: The radio frequency interlocking circuit includes a power supply unit, a discrete quantity acquisition interface unit, a logic control circuit unit and a power on / off unit; The power supply unit is connected to the discrete quantity acquisition interface unit and is used to supply power to the logic control circuit unit; The discrete quantity acquisition interface unit is connected to the logic control circuit unit, and is used to receive the discrete signal quantity input from the outside, and convert the discrete signal quantity into the input signal of the logic control circuit unit; The logic control circuit unit is connected to the power on / off unit and is used to generate a power on / off signal according to the input signal; The power on / off unit is connected to the local power circuit and is used to perform on / off control on the local power circuit according to the power on / off signal.

3. The wireless quick access recorder according to claim 2, characterized in that: The power supply unit includes a low voltage dropout linear regulator and a bypass capacitor.

4. The wireless quick access recorder according to claim 2, characterized in that: The discrete quantity acquisition interface unit includes a first discrete signal acquisition circuit and a second discrete signal acquisition circuit, the first discrete signal acquisition circuit and the second discrete signal acquisition circuit are connected in parallel, the first discrete signal acquisition circuit includes a comparator, the second discrete signal acquisition circuit includes a pull-up resistor and a low-pass filter, one end of the pull-up resistor is connected to the input voltage, and the other end is respectively connected to the signal input end and the low-pass filter.

5. The wireless quick access recorder according to claim 2, characterized in that: The logic control circuit unit includes an XOR gate circuit, an XOR gate circuit and an inverter circuit. The XOR gate circuit includes a first XOR gate unit, a second XOR gate unit, a third XOR gate unit and a fourth XOR gate unit. The XOR gate circuit includes a first XOR gate unit, a second XOR gate unit, a third XOR gate unit and a fourth XOR gate unit. The inverter circuit includes a first inverter and a second inverter. The first XOR gate unit is connected in parallel with the second XOR gate unit, the third XOR gate unit and the fourth XOR gate unit. The output end of the first XOR gate unit is connected to the first input end of the first XOR gate unit, and the output end of the second XOR gate unit is connected to the The second input end of the first XOR gate unit and the output end of the third XOR gate unit are connected to the first input end of the second XOR gate unit, the output end of the fourth XOR gate unit is connected to the second input end of the second XOR gate unit, the output end of the first XOR gate unit is connected to the first input end of the third XOR gate unit, the output end of the second XOR gate unit is connected to the second input end of the third XOR gate unit, the output end of the third XOR gate unit is connected to the first input end of the fourth XOR gate unit, the first inverter is connected to the output end of the fourth XOR gate unit, and the second inverter is connected to the first input end of the fourth XOR gate.

6. The wireless quick access recorder according to claim 2, characterized in that: The power on-off unit includes a first switch tube, a second switch tube and a third switch tube, the gate of the first switch tube is connected to the output end of the logic control circuit unit, the drain of the first switch tube is connected to the ground end, the source of the first switch tube is connected to the gate of the second switch tube and the gate of the third switch tube, the source of the second switch tube is connected to the voltage end, the drain of the second switch tube is connected to the drain of the third switch tube, and the source of the third switch tube is connected to the ground end.

7. The wireless quick access recorder according to claim 2, characterized in that: The radio frequency interlocking circuit further includes a voltage monitoring unit, and the voltage monitoring unit is used to monitor the input voltage.

8. The wireless quick access recorder according to claim 2, characterized in that: The radio frequency interlocking circuit also includes a redundant backup unit, the output end of which is connected to the input end of the discrete quantity acquisition interface unit, and is used for performing redundant backup of externally input discrete signal quantities.

9. The wireless quick access recorder according to claim 1, characterized in that: The wireless quick access recorder also includes a liquid crystal display module, function keys and a fault indicator light.

10. A method for collecting and transmitting data from a wireless fast access recorder, characterized in that: Applied to a wireless quick access recorder as claimed in any one of claims 1 to 9, the method comprising: Get external discrete semaphore; The switch of the local power supply circuit is controlled according to the external discrete signal quantity, and when the switch of the local power supply circuit is in an on state, a wireless signal is acquired through a wireless communication circuit for data transmission.

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