A universal monitoring platform for microwave landing equipment and precision ranging equipment

Abstract

The present invention proposes a universal monitor platform for microwave landing equipment and precision ranging equipment, comprising: an analog input channel is connected to a dual-channel A / D analog-to-digital converter, the dual-channel A / D analog-to-digital converter is connected to an FPGA chip in a data processing module, the FPGA chip and the DSP chip in the data processing module are connected to a storage call module and a time module through a bus; the DSP chip is connected to a CAN communication module; the dual-channel A / D analog-to-digital converter comprises: an A / D chip, a peripheral resistor, a capacitor and a resistor array, the A / D chip is connected to the resistor array, the peripheral resistor performs function configuration on the A / D chip, and the capacitor is used for powering the A / D chip and filtering the reference voltage; the power supply circuit comprises: a fusible fuse component and a power chip component, wherein the power chip component is connected to the fusible fuse component, the power chip component performs power conversion on the voltage connected from the fusible fuse component, and then the converted voltage is supplied to the corresponding chip of the monitor.

Description

Technical Field

[0001] The present invention relates to the field of monitoring digital processing technology common to microwave landing equipment and precision ranging equipment, and in particular to a monitoring platform common to microwave landing equipment and precision ranging equipment. Background Art

[0002] The MLS landing system and the precision DME system have become essential equipment for the precision landing guidance of advanced aircraft. The two systems are often installed together and play a very important role in ensuring the safe landing of aircraft. The monitor has the function of monitoring equipment in these two devices. Whether the parameters are in alarm can directly reflect whether the equipment is in normal working condition. Summary of the invention

[0003] The object of the present invention is to solve at least one of the technical drawbacks.

[0004] To this end, the purpose of the present invention is to provide a monitor platform that is common to microwave landing equipment and precision ranging equipment.

[0005] In order to achieve the above-mentioned object, an embodiment of the present invention provides a monitoring platform common to microwave landing equipment and precision ranging equipment, including:

[0006] Analog input channel, dual-channel A / D analog-to-digital converter, data processing module, parameter storage and call module, CAN communication module, level conversion circuit, time module and power supply circuit, among which,

[0007] The analog input channel is connected to a dual-channel A / D analog-to-digital converter, the dual-channel A / D analog-to-digital converter is connected to an FPGA chip in a data processing module, the FPGA chip and the DSP chip in the data processing module are connected to a storage call module and a time module via a bus, and the FPGA chip in the data processing module is connected to a level conversion circuit; the DSP chip is connected to a CAN communication module;

[0008] The dual-channel A / D analog-to-digital converter comprises: an A / D chip, a peripheral resistor, a capacitor and a resistor bank, wherein the A / D chip is connected to the resistor bank, the peripheral resistor is used to perform functional configuration on the A / D chip, and the capacitor is used to power the A / D chip and filter the reference voltage;

[0009] The data processing module includes: an FPGA chip, a first crystal oscillator, a reset chip, a first download interface, a second download interface, a DSP chip, a second crystal oscillator, and a second download interface, wherein the bus between the FPGA chip and the DSP chip is connected by a resistor bank, the first crystal oscillator, the reset chip, the first download interface, and the second download interface are respectively connected to the FPGA chip, and the second crystal oscillator and the second download interface are connected to the DSP chip;

[0010] The parameter storage calling module includes: an E2PROM chip, a FLASH chip and a ferroelectric chip, wherein the E2PROM chip is connected to the FPGA chip, and the FLASH chip and the ferroelectric chip are respectively connected to the DSP chip through a data bus;

[0011] The CAN communication module comprises: a first crystal, a CAN expansion chip, and a CAN communication chip, wherein the first crystal is connected to the CAN expansion chip, and the CAN expansion chip is connected to the CAN communication chip;

[0012] The level conversion circuit comprises: a level conversion chip and a resistor bank, wherein the level conversion chip is connected to the resistor bank and the FPGA chip;

[0013] The time module comprises: a second crystal, a battery, a triode and a time chip, wherein the second crystal and the battery are connected to the time chip respectively, and the battery is connected to the triode;

[0014] The power supply circuit includes: a fusible fuse component and a power chip component, wherein the power chip component is connected to the fusible fuse component, and the power chip component performs power conversion on the voltage connected to the fusible fuse component, and then supplies the converted voltage to the corresponding chip of the monitor.

[0015] Furthermore, the analog input channel includes: 7 operational amplifiers, a multi-way analog switch, a first differential operational amplifier, a multi-way analog switch, and a second differential operational amplifier, wherein the multi-way analog switch is connected to the first differential operational amplifier and the second differential operational amplifier, and the differential signals output by the first differential operational amplifier and the second differential operational amplifier are respectively sent to a dual-channel A / D analog-to-digital converter.

[0016] Furthermore, the sampling data of the A / D chip reaches the DSP chip through the data bus, the DSP chip judges and performs corresponding processing, and then sends it to the display platform through the CAN interface.

[0017] Further, the fusible fuse assembly includes: a first fusible fuse, a second fusible fuse, and a third fusible fuse; the power chip assembly includes: a first power chip, a second power chip, a third power chip and a fourth power chip; wherein, the first fusible fuse, the second fusible fuse and the third fusible fuse respectively input a +5V voltage, a +15V voltage and a -15V voltage; the first power chip converts the +5V voltage to 3.3V, the second power chip converts the +5V voltage to 1.2V, the third power chip converts the +5V voltage to 2.5V, and the fourth power chip converts the -15V voltage to -5V, and the converted voltages supply power to the corresponding chips of the monitor.

[0018] Furthermore, the DSP chip performs the following functions: power-on initialization, self-detection function, communication function, data acquisition and analysis, and data processing function, wherein:

[0019] The power-on initialization includes: power-on initialization of external hardware and DSP internal resources;

[0020] The self-test function includes: power-on self-test;

[0021] The communication functions include: CAN bus transceiver and I / O bus transceiver;

[0022] The data collection and analysis includes: high-speed data collection, data transmission and preprocessing, data calculation and judgment;

[0023] The data processing functions include: alarm storage and calling, and protocol parsing and packaging.

[0024] Furthermore, the FPGA chip includes: a frequency division module, an AD interface, a dual-port RAM, a main state machine, a pulse calculation state machine and a DSP bus interface, wherein the input end of the frequency division module is connected to a 20MHz signal, the output end of the frequency division module is connected to the input end of the AD interface, the output end of the AD interface is connected to the input end of the dual-port RAM, the main state machine is bidirectionally connected to the DSP bus interface, the output end of the main state machine is connected to the input end of the dual-port RAM, the dual-port RAM is bidirectionally connected to the DSP bus interface; the output end of the pulse calculation state machine is connected to the input end of the DSP bus interface.

[0025] Furthermore, the level conversion circuit is connected to the frequency signal, the DPSK signal, the self-test scanning signal, the self-test DPSK signal and the periodic synchronization signal.

[0026] Furthermore, the monitor measures the detection signals from the inner field, outer field, data, and OCI to obtain various signal power values ​​and angle information; measures the DPSK detection signal from the frequency combination, monitors the preamble code, basic / auxiliary data word information, measures the frame rate and data word correctness; measures the number of failed phase shifters; measures the azimuth / elevation synchronization superposition time; measures the complete scanning cycle time; receives the self-test signal from the communication interface to perform periodic self-test to ensure the integrity of the monitor itself.

[0027] Furthermore, the DSP bus interface is connected to the DSP address and data bus, the main state machine receives the DPSK signal, and sends an analog switch signal to the outside; the pulse calculation state machine receives the 20MHz signal, the phase shifter pulse, the synchronization period pulse and the frequency signal, and sends an interrupt signal and a data signal to the DSP bus interface.

[0028] Furthermore, the DSP bus interface sends a dual-port RAM address signal to the dual-port RAM, and receives a data signal returned by the dual-port RAM.

[0029] According to the universal monitor platform for microwave landing equipment and precision ranging equipment of the embodiment of the present invention, the main function of the monitor is to monitor whether the radiation signal of the equipment is normal, that is, to compare all measurements with the corresponding alarm threshold preset in the on-board memory. If the alarm threshold is exceeded, an alarm indication signal is sent to the control unit to notify the corresponding control unit to switch the main and standby machines or shut down. At the same time, the alarm record at this time is saved. It has advanced technology, stable operation, and reliable performance, which meets the monitoring requirements of microwave landing equipment and precision ranging equipment. The digital processing unit monitor implements sampling digital processing technology in microwave landing equipment and precision ranging equipment, softwareizes hardware functions, and has good operability. At the same time, real-time monitoring of parameters such as the angle of the internal and external field signals is realized, and the angle measurement speed and accuracy are improved compared with the previous generation of products. The technical effect is that it has advanced technology, stable operation, and reliable performance, which meets the monitoring requirements of microwave landing equipment and precision ranging equipment. The digital processing unit monitor of the present invention implements sampling digital processing technology in microwave landing equipment and precision ranging equipment, softwareizes hardware functions, and has good operability. At the same time, real-time monitoring of parameters such as the angles of internal and external field signals is achieved, and the angle measurement speed and accuracy are improved compared to the previous generation of products.

[0030] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0032] Figure 1 A block diagram of the hardware composition of a monitor platform common to microwave landing equipment and precision ranging equipment according to an embodiment of the present invention;

[0033] Figure 2 This is a DSP functional module structure diagram of a monitor platform common to microwave landing equipment and precision ranging equipment according to an embodiment of the present invention;

[0034] Figure 3 This is a structural diagram of the FPGA functional modules of a monitor platform common to microwave landing equipment and precision ranging equipment according to an embodiment of the present invention;

[0035] Figure 4a and Figure 4b is a circuit diagram of seven operational amplifiers according to an embodiment of the present invention;

[0036] Figure 5 A circuit diagram of a group of multi-way analog switches and a differential operational amplifier according to an embodiment of the present invention;

[0037] Figure 6 is a circuit diagram of another group of multi-way analog switches and differential operational amplifiers according to an embodiment of the present invention;

[0038] Figure 7 is a circuit diagram of an A / D chip according to an embodiment of the present invention;

[0039] Figure 8 A circuit diagram of an FPGA chip according to an embodiment of the present invention;

[0040] Fig. 9 A circuit diagram of a DSP chip according to an embodiment of the present invention;

[0041] Fig.10 A circuit diagram of a FLASH chip according to an embodiment of the present invention;

[0042] Fig.11 A circuit diagram of a ferroelectric according to an embodiment of the present invention;

[0043] Fig.12a and Figure 12b is a circuit diagram of a level conversion chip according to an embodiment of the present invention;

[0044] Fig.13 A circuit diagram of a time chip according to an embodiment of the present invention;

[0045] Fig.14 A circuit diagram of a CAN expansion chip according to an embodiment of the present invention;

[0046] Fig.15 is a circuit diagram of a power chip according to an embodiment of the present invention. DETAILED DESCRIPTION

[0047] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limiting the present invention.

[0048] This application involves the monitoring digital processing technology common to microwave landing equipment and precision ranging equipment. This monitoring platform can be applied not only to the above two types of equipment, but also to the digital processing circuits of other equipment with monitoring functions, such as TACAN, due to its redundant design.

[0049] like Figure 1 As shown, the universal monitoring platform for microwave landing equipment and precision ranging equipment in the embodiment of the present invention includes: analog input channel, dual-channel A / D analog-to-digital converter, data processing module, parameter storage and calling module, CAN communication module, level conversion circuit, time module and power supply circuit. The FPGA+DSP dual CPU architecture is adopted, in which the FPGA is mainly responsible for digital signal processing tasks, and the DSP is mainly responsible for control, communication, storage and other tasks. Programmable logic devices are used to convert hardware functions into software.

[0050] The analog input channel is connected to the dual-channel A / D analog-to-digital converter, the dual-channel A / D analog-to-digital converter is connected to the FPGA chip in the data processing module, the FPGA chip and DSP chip in the data processing module are connected to the storage call module and the time module by a bus, and the FPGA chip in the data processing module is connected to the level conversion circuit. The monitor monitors the controller, transmitter components and antenna feedback signals in the equipment at the same time. At the same time, the monitor has a self-test function, which can receive the self-test signal from the communication interface to perform a periodic self-test function to verify the accuracy of the monitor's own power measurement and angular accuracy to ensure the integrity of the monitor itself.

[0051] Monitor whether the radiation signal of the equipment is normal, that is, compare all measured parameters with the corresponding alarm thresholds preset in the memory of the monitor. If the alarm threshold is exceeded, an alarm indication signal is sent to the main control unit to notify the corresponding control unit to switch between the main and standby machines or shut down. At the same time, the alarm record is saved.

[0052] Specifically, the analog input channel is connected to the dual-channel A / D analog-to-digital converter, the dual-channel A / D analog-to-digital converter is connected to the FPGA chip in the data processing module, the FPGA chip and the DSP chip in the data processing module are connected to the storage call module and the time module through a bus, the FPGA chip in the data processing module is connected to the level conversion circuit; the DSP chip is connected to the CAN communication module.

[0053] The analog input channel includes: 7 operational amplifiers, a multi-channel analog switch, a first differential operational amplifier, a multi-channel analog switch, and a second differential operational amplifier, wherein three channels are used for analog signal input for microwave equipment monitoring, and two channels are used for analog signal input for precision ranging equipment monitoring. The operational amplifier is connected to the multi-channel analog switch, the multi-channel analog switch is connected to the first differential operational amplifier and the second differential operational amplifier, and the differential signals output by the first differential operational amplifier and the second differential operational amplifier are respectively sent to the dual-channel A / D analog-to-digital converter.

[0054] like Figure 4a and Figure 4b As shown, the analog input channel includes 7 operational amplifiers such as N301 to N307, a multi-way analog switch D302, a differential operational amplifier D303, a multi-way analog switch D304, and a differential operational amplifier D305. Among them: three channels are used for analog signal input for microwave equipment monitoring, and two channels are used for analog signal input for precision ranging equipment monitoring. N301 is connected to N302, N303 is connected to N304, N302, N305 and N307 are connected to D302, N304 and N306 are connected to D304, the multi-way analog switch D302 is connected to the differential operational amplifier D303, the multi-way analog switch D304 is connected to the differential operational amplifier D305, refer to Figure 5 and Figure 6 The differential signals output by the two differential operational amplifiers are respectively sent to the A / D analog-to-digital converters for sampling.

[0055] The dual-channel A / D analog-to-digital converter includes: an A / D chip, peripheral resistors, capacitors and a resistor bank, wherein the A / D chip is connected to the resistor bank, the peripheral resistors are used to perform functional configuration on the A / D chip, and the capacitors are used to power the A / D chip and filter the reference voltage.

[0056] refer to Figure 7 The dual-channel A / D analog-to-digital converter includes an A / D chip D301 and its peripheral resistors, capacitors and resistor banks. Among them: the A / D analog-to-digital converter D301 is connected to the resistor bank, the peripheral resistors are used for the functional configuration of D301, and the capacitors are used for chip power supply and reference voltage filtering.

[0057] The data processing module includes: FPGA chip, first crystal oscillator, reset chip, first download interface, second download interface, DSP chip, second crystal oscillator and second download interface, wherein the bus between FPGA chip and DSP chip is connected by resistor row, the first crystal oscillator 20MHz crystal oscillator, reset chip, first download interface CONFIG download interface, second download interface JTAG download interface are connected to FPGA chip respectively, the second crystal oscillator 37.5MHz crystal oscillator and second download interface JTAG download interface are connected to DSP chip. The sampling data of A / D enters FPGA through data bus for calculation, and the calculated data is sent to DSP through bus, judged and processed accordingly by DSP, and then sent to display platform through CAN port.

[0058] Figure 8 is a circuit diagram of an FPGA chip according to an embodiment of the present invention. Figure 3 The FPGA functional module structure diagram of the monitor platform commonly used for microwave landing equipment and precision ranging equipment according to the embodiment of the present invention. The data processing module includes FPGA chip D101, crystal oscillator G1, reset chip D103, download interface XP11, download interface XP12, DSP chip D201, crystal oscillator G21 and download interface XP2. Among them: the bus between FPGA chip D101 and DSP chip D201 is connected by a resistor bank, crystal oscillator G1, reset chip D103, download interface XP11, download interface XP12 are connected to FPGA chip D101, and crystal oscillator G21 and download interface XP2 are connected to DSP chip D201. The sampling data of A / D enters FPGA through the data bus for calculation, and the calculated data is sent to DSP through the bus, judged and processed accordingly by DSP, and then sent to the display platform through the CAN port.

[0059] refer to Figure 3 , the DSP bus interface accesses the DSP address and data bus, the main state machine receives the DPSK signal and sends an analog switch signal to the outside; the pulse calculation state machine receives the 20MHz signal, the phase shifter pulse, the synchronization period pulse and the frequency signal, and sends an interrupt signal and a data signal to the DSP bus interface. The DSP bus interface sends the dual-port RAM address signal to the dual-port RAM and receives the data signal returned by the dual-port RAM.

[0060] Figure 2 It is a structural diagram of the DSP functional modules of a monitor platform common to microwave landing equipment and precision ranging equipment according to an embodiment of the present invention. Fig. 9 FIG. 4 is a circuit diagram of a DSP chip according to an embodiment of the present invention.

[0061] The DSP chip performs the following functions: power-on initialization, self-detection, communication, data acquisition and analysis, and data processing.

[0062] Power-on initialization includes: power-on initialization of external hardware and DSP internal resources;

[0063] Self-test functions include: power-on self-test;

[0064] Communication functions include: CAN bus transceiver and I / O bus transceiver;

[0065] Data collection and analysis include: high-speed data collection, data transmission and preprocessing, data calculation and judgment;

[0066] Data processing functions include: alarm storage and call, protocol parsing and packaging.

[0067] refer to Figure 3 The FPGA chip includes: a frequency division module, an AD interface, a dual-port RAM, a main state machine, a pulse calculation state machine and a DSP bus interface, wherein the input end of the frequency division module is connected to a 20MHz signal, the output end of the frequency division module is connected to the input end of the AD interface, the output end of the AD interface is connected to the input end of the dual-port RAM, the main state machine is bidirectionally connected to the DSP bus interface, the output end of the main state machine is connected to the input end of the dual-port RAM, the dual-port RAM is bidirectionally connected to the DSP bus interface; the output end of the pulse calculation state machine is connected to the input end of the DSP bus interface.

[0068] The parameter storage calling module includes: an E2PROM chip, a FLASH chip and a ferroelectric chip, wherein the E2PROM chip is connected with the FPGA chip, and the FLASH chip and the ferroelectric chip are respectively connected with the DSP chip through a data bus.

[0069] Fig.10 A circuit diagram of a FLASH chip according to an embodiment of the present invention; Fig.11 : is a circuit diagram of a ferroelectric according to an embodiment of the present invention. Specifically, the parameter storage calling module includes an E2PROM chip D102, a FLASH chip D203 and a ferroelectric D204. Among them: the E2PROM chip D102 is connected to D101, and the FLASH chip D203 and the ferroelectric D204 are respectively connected to D201 through a data bus.

[0070] The CAN communication module includes: a first crystal, a CAN expansion chip, and a CAN communication chip, wherein the first crystal is connected to the CAN expansion chip, and the CAN expansion chip is connected to the CAN communication chip. Fig.14 The circuit diagram of the CAN expansion chip according to the embodiment of the present invention is shown in FIG. The CAN interface includes a first crystal G24, a CAN expansion chip D208, and a CAN communication chip D209. The first crystal G24 is connected to the CAN expansion chip D208, and the CAN expansion chip D208 is connected to the CAN communication chip D209.

[0071] The level conversion circuit includes: a level conversion chip and a resistor bank, wherein the level conversion chip is connected to the resistor bank and the FPGA chip. Specifically, the level conversion circuit includes 4 level conversion chips and a resistor bank. Among them: 3 level conversion chips are connected to the I / O of the FPGA, and 1 level conversion chip is connected to the resistor bank. 3 chips are used for input signal conversion, and 1 chip is used for output signal conversion.

[0072] The level conversion circuit is connected to the frequency signal, the DPSK signal, the self-checking scanning signal, the self-checking DPSK signal and the periodic synchronization signal.

[0073] like Fig.12a and Figure 12b As shown, the level conversion circuit includes level conversion chips D601, D602, D603, D604 and resistor arrays RN61 to RN68. Among them: D601 is connected to some pins of D604, D601, D602, D603 are connected to the I / O of FPGA, and the remaining pins of D604 are connected to the resistor arrays RN61 to RN68. D601, D602 and D603 are used for input signal conversion, and D604 is used for output signal conversion.

[0074] The time module includes: a second crystal, a battery, a triode and a time chip, wherein the second crystal and the battery are connected to the time chip respectively, and the battery is connected to the triode V23. Fig.13 The circuit diagram of the time chip according to the embodiment of the present invention. The battery powers the clock chip, and the clock chip can still work even if the device is turned off. The output of the transistor provides a battery test voltage to ensure that it can be replaced in time when the voltage is low.

[0075] Specifically, the time module includes a crystal G22, a battery GB1, a transistor V23 and a time chip D202. Among them: the crystal G22, the battery GB1 and D202 are connected, and GB1 is connected to the transistor V23. The battery powers the clock chip, and the clock chip can still work even if the device is turned off. The output of the transistor V23 provides a battery test voltage to ensure that it can be replaced in time when the voltage is low.

[0076] The power supply circuit includes: a fusible fuse component and a power chip component, wherein the power chip component is connected to the fusible fuse component, and the power chip component performs power conversion on the voltage connected from the fusible fuse component, and then supplies the converted voltage to the corresponding chip of the monitor. Fig.15 is a circuit diagram of a power chip according to an embodiment of the present invention.

[0077] Among them: the fusible fuses are input +5V voltage, +15V voltage and -15V voltage respectively. The power chip converts the +5V voltage to 3.3V, 1.2V, 2.5V according to the configured resistor, and the power chip converts the -15V voltage to -5V. The converted voltage supplies power to the corresponding chip of the monitor.

[0078] Specifically, the fusible fuse component includes: a first fusible fuse, a second fusible fuse, and a third fusible fuse; the power chip component includes: a first power chip, a second power chip, a third power chip and a fourth power chip; wherein, the first fusible fuse, the second fusible fuse, and the third fusible fuse respectively input +5V voltage, +15V voltage and -15V voltage; the first power chip converts the +5V voltage to 3.3V, the second power chip converts the +5V voltage to 1.2V, the third power chip converts the +5V voltage to 2.5V, and the fourth power chip converts the -15V voltage to -5V, and the converted voltages supply power to the corresponding chips of the monitor.

[0079] The power supply circuit includes fusible fuses F501~F503 and power supply chips D501~D504. Among them: fusible fuses F501~F503 input +5V voltage, +15V voltage and -15V voltage respectively. D501 converts +5V voltage to 3.3V, D502 converts +5V voltage to 1.2V, D503 converts +5V voltage to 2.5V and D504 converts -15V voltage to -5V. The converted voltages power the corresponding chips of the monitor.

[0080] The monitoring subsystem adopts dual monitors, consisting of monitor 1 and monitor 2.

[0081] The main function of the monitor subsystem is to monitor whether the radiation signal of the equipment is normal, that is, to compare all measurements with the corresponding alarm thresholds preset in the on-board memory. If the alarm threshold is exceeded, an alarm indication signal is sent to the main control unit to notify the corresponding control unit to switch between the main and standby machines or shut down. At the same time, the alarm record is saved.

[0082] Signals monitored by the monitor include:

[0083] (1) Measure the detection signals from the internal field, external field, data, and OCI channels to obtain various signal power values ​​and angle information. Perform real-time processing and judgment on the angular accuracy, power amplitude, PFE, CMN and other information;

[0084] (2) Measure the DPSK detection signal from the frequency combination, monitor the preamble code, basic / auxiliary data word information, and measure the frame rate and data word correctness;

[0085] (3) Measure the number of failed phase shifters;

[0086] (4) Measure azimuth / elevation synchronous stacking time;

[0087] (5) Measure the complete scanning cycle time;

[0088] (6) Receive the self-test signal from the communication interface to perform periodic self-test to ensure the integrity of the monitor itself.

[0089] The technical indicators are as follows:

[0090] (1) Hardware technical indicators

[0091] a) CAN port communication rate: 500kbps;

[0092] b) Power consumption: ≤7.5W;

[0093] c) A / D conversion: input voltage: 0.0V~2V;

[0094] d) Number of conversion digits: 14 digits;

[0095] e) Conversion speed: 40MHz;

[0096] f) Input IO number: 54;

[0097] g) Number of output IO: 5.

[0098] (2) System parameter technical indicators

[0099] a) Measurement angle accuracy: ±0.002°;

[0100] b) Measurement level accuracy: ±0.01V;

[0101] c) Measurement frequency accuracy: ±1kHz;

[0102] d) Power amplitude accuracy: 0.01V;

[0103] e) Power percentage accuracy: 1%;

[0104] f) Indoor field level accuracy: 1dB;

[0105] g) Synchronous complete cycle accuracy: 0.1ms;

[0106] h) Synchronous superposition measurement: 1us.

[0107] According to the universal monitor platform for microwave landing equipment and precision ranging equipment of the embodiment of the present invention, the main function of the monitor is to monitor whether the radiation signal of the equipment is normal, that is, to compare all measurements with the corresponding alarm threshold preset in the on-board memory. If the alarm threshold is exceeded, an alarm indication signal is sent to the control unit to notify the corresponding control unit to switch the main and standby machines or shut down. At the same time, the alarm record at this time is saved. It has advanced technology, stable operation, and reliable performance, which meets the monitoring requirements of microwave landing equipment and precision ranging equipment. The digital processing unit monitor implements sampling digital processing technology in microwave landing equipment and precision ranging equipment, softwareizes hardware functions, and has good operability. At the same time, real-time monitoring of parameters such as the angle of the internal and external field signals is realized, and the angle measurement speed and accuracy are improved compared with the previous generation of products. The technical effect is that it has advanced technology, stable operation, and reliable performance, which meets the monitoring requirements of microwave landing equipment and precision ranging equipment. The digital processing unit monitor of the present invention implements sampling digital processing technology in microwave landing equipment and precision ranging equipment, softwareizes hardware functions, and has good operability. At the same time, real-time monitoring of parameters such as the angles of internal and external field signals is achieved, and the angle measurement speed and accuracy are improved compared to the previous generation of products.

[0108] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0109] Although the embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and cannot be understood as limiting the present invention. Those skilled in the art may change, modify, replace and modify the above embodiments within the scope of the present invention without departing from the principles and purpose of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A universal monitoring platform for microwave landing equipment and precision ranging equipment, characterized in that: include: Analog input channel, dual-channel A / D analog-to-digital converter, data processing module, parameter storage and call module, CAN communication module, level conversion circuit, time module and power supply circuit, among which, The analog input channel is connected to a dual-channel A / D analog-to-digital converter, the dual-channel A / D analog-to-digital converter is connected to an FPGA chip in a data processing module, the FPGA chip and the DSP chip in the data processing module are connected to a storage call module and a time module via a bus, and the FPGA chip in the data processing module is connected to a level conversion circuit; the DSP chip is connected to a CAN communication module; The dual-channel A / D analog-to-digital converter comprises: an A / D chip, a peripheral resistor, a capacitor and a resistor bank, wherein the A / D chip is connected to the resistor bank, the peripheral resistor is used to perform functional configuration on the A / D chip, and the capacitor is used to power the A / D chip and filter the reference voltage; The data processing module includes: an FPGA chip, a first crystal oscillator, a reset chip, a first download interface, a second download interface, a DSP chip, a second crystal oscillator, and a second download interface, wherein the bus between the FPGA chip and the DSP chip is connected by a resistor bank, the first crystal oscillator, the reset chip, the first download interface, and the second download interface are respectively connected to the FPGA chip, and the second crystal oscillator and the second download interface are connected to the DSP chip; The parameter storage calling module includes: an E2PROM chip, a FLASH chip and a ferroelectric chip, wherein the E2PROM chip is connected to the FPGA chip, and the FLASH chip and the ferroelectric chip are respectively connected to the DSP chip through a data bus; The CAN communication module comprises: a first crystal, a CAN expansion chip, and a CAN communication chip, wherein the first crystal is connected to the CAN expansion chip, and the CAN expansion chip is connected to the CAN communication chip; The level conversion circuit comprises: a level conversion chip and a resistor bank, wherein the level conversion chip is connected to the resistor bank and the FPGA chip; The time module comprises: a second crystal, a battery, a triode and a time chip, wherein the second crystal and the battery are connected to the time chip respectively, and the battery is connected to the triode; The power supply circuit includes: a fusible fuse component and a power chip component, wherein the power chip component is connected to the fusible fuse component, and the power chip component performs power conversion on the voltage connected to the fusible fuse component, and then supplies the converted voltage to the corresponding chip of the monitor; The monitor measures the detection signals from the infield, outfield, data, and OCI channels to obtain various signal power values ​​and angle information; measures the DPSK detection signal from the frequency combination, monitors the preamble, basic / auxiliary data word information, and measures the frame rate and data word correctness; measures the number of failed phase shifters; measures the azimuth / elevation synchronization superposition time; measures the complete scanning cycle time; receives the self-test signal from the communication interface to perform periodic self-test to ensure the integrity of the monitor itself; The analog input channel includes: 7 operational amplifiers, a multi-way analog switch, a first differential operational amplifier, and a second differential operational amplifier, wherein the multi-way analog switch is connected to the first differential operational amplifier and the second differential operational amplifier, and the differential signals output by the first differential operational amplifier and the second differential operational amplifier are respectively sent to a dual-channel A / D analog-to-digital converter; The fusible fuse assembly includes: a first fusible fuse, a second fusible fuse, and a third fusible fuse; the power chip assembly includes: a first power chip, a second power chip, a third power chip, and a fourth power chip; wherein the first fusible fuse, the second fusible fuse, and the third fusible fuse are respectively input with a +5V voltage, a +15V voltage, and a -15V voltage; the first power chip converts the +5V voltage to 3.3V, the second power chip converts the +5V voltage to 1.2V, the third power chip converts the +5V voltage to 2.5V, and the fourth power chip converts the -15V voltage to -5V, and the converted voltages are used to supply power to the corresponding chips of the monitor; The FPGA chip includes: a frequency division module, an AD interface, a dual-port RAM, a main state machine, a pulse calculation state machine and a DSP bus interface, wherein the input end of the frequency division module is connected to a 20MHz signal, the output end of the frequency division module is connected to the input end of the AD interface, the output end of the AD interface is connected to the input end of the dual-port RAM, the main state machine is bidirectionally connected to the DSP bus interface, the output end of the main state machine is connected to the input end of the dual-port RAM, the dual-port RAM is bidirectionally connected to the DSP bus interface; the output end of the pulse calculation state machine is connected to the input end of the DSP bus interface.

2. The universal monitoring platform for microwave landing equipment and precision ranging equipment as claimed in claim 1, characterized in that: The sampling data of the A / D chip reaches the DSP chip through the data bus, and the DSP chip judges and performs corresponding processing, and then sends it to the display platform through the CAN interface.

3. The universal monitoring platform for microwave landing equipment and precision ranging equipment as claimed in claim 1, characterized in that: The DSP chip performs the following functions: power-on initialization, self-detection function, communication function, data acquisition and analysis, and data processing function, wherein: The power-on initialization includes: power-on initialization of external hardware and DSP internal resources; The self-test function includes: power-on self-test; The communication functions include: CAN bus transceiver and I / O bus transceiver; The data collection and analysis includes: high-speed data collection, data transmission and preprocessing, data calculation and judgment; The data processing functions include: alarm storage and calling, and protocol parsing and packaging.

4. The universal monitoring platform for microwave landing equipment and precision ranging equipment as claimed in claim 1, characterized in that: The level conversion circuit is connected to a frequency signal, a DPSK signal, a self-check scanning signal, a self-check DPSK signal and a periodic synchronization signal.

5. The universal monitoring platform for microwave landing equipment and precision ranging equipment as claimed in claim 1, characterized in that: The DSP bus interface is connected to the DSP address and data bus, the main state machine receives the DPSK signal and sends an analog switch signal to the outside; the pulse calculation state machine receives the 20MHz signal, the phase shifter pulse, the synchronization period pulse and the frequency signal, and sends an interrupt signal and a data signal to the DSP bus interface.

6. The common monitoring platform for microwave landing equipment and precision ranging equipment as claimed in claim 1, characterized in that: The DSP bus interface sends a dual-port RAM address signal to the dual-port RAM, and receives a data signal returned by the dual-port RAM.

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