CN108037703B - Portable calibration device and calibration method for mounting position of angular displacement sensor - Google Patents
Portable calibration device and calibration method for mounting position of angular displacement sensor Download PDFInfo
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- CN108037703B CN108037703B CN201711352241.2A CN201711352241A CN108037703B CN 108037703 B CN108037703 B CN 108037703B CN 201711352241 A CN201711352241 A CN 201711352241A CN 108037703 B CN108037703 B CN 108037703B
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- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B19/00—Programme-control systems
- G05B19/02—Programme-control systems electric
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- G05B19/042—Programme control other than numerical control, i.e. in sequence controllers or logic controllers using digital processors
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- G—PHYSICS
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- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
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Abstract
The invention provides a portable calibration device and a portable calibration method for an installation position of an angular displacement sensor, and relates to the technical field of aero-engines. A portable calibration device for the installation position of an angular displacement sensor comprises an operation terminal, a USB data line, a back clip, a connecting plug and a cable; the operation terminal is a tablet personal computer, the back clamp is installed on the operation terminal shell, and the angular displacement sensor position data acquisition module is installed in the back clamp. The invention also provides a method for calibrating the installation position of the angular displacement sensor by adopting the device, so that the portable calibration device for the installation position of the angular displacement sensor can be used for calibrating the installation position of the angular displacement sensor of the aircraft engine. The portable calibration device and the calibration method for the mounting position of the angular displacement sensor, provided by the invention, have the advantages that the portable calibration of the position of the angular displacement sensor is realized in advance after the engine is assembled, the calibration process is changed, and the productivity of the ground test of the engine is improved.
Description
Technical Field
The invention relates to the technical field of aircraft engines, in particular to a portable calibration device and a calibration method for the installation position of an angular displacement sensor.
Background
When an aircraft engine with a digital electronic control system is used in a ground test, the installation positions of a fan compressor guide vane angular displacement sensor alpha 1, a high-pressure compressor guide vane angular displacement sensor alpha 2 and a nozzle area angular displacement sensor D8 which are assembled on the aircraft engine and used for indicating the blade rotation angle of the engine and the position of an engine nozzle are required to be calibrated, so that the corresponding relation between the position of each angular displacement sensor and the angle of a measured blade or the scale of the nozzle can meet the requirements of engine test technical files, the safety of a control system in the process of the engine test is ensured, and the engine is prevented from generating large damaging accidents such as surge and the like. And each time of calibrating the installation position of the angular displacement sensor, a special ground inspection instrument and engine ground test pressing equipment need to be connected, the position of the angular displacement sensor needs to be adjusted repeatedly, the effective working time of the aircraft engine ground test is occupied by 5 hours, and the productivity of the aircraft engine ground test is influenced.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides a portable calibration device and a calibration method for the installation position of an angular displacement sensor, which are used for calibrating the installation position of the angular displacement sensor assembled on an aircraft engine.
In one aspect, the invention provides a portable calibration device for the installation position of an angular displacement sensor, which comprises an operation terminal, a USB data line, a back clip, a connecting plug and a cable, wherein the operation terminal is connected with the USB data line; the operation terminal is a tablet computer; the back clamp is arranged on the shell of the tablet personal computer, an angular displacement sensor position data acquisition module is arranged in the back clamp, and one end of the angular displacement sensor position data acquisition module is connected with the angular displacement sensor to be detected through a connecting plug and a cable; the other end of the angular displacement sensor position data acquisition module is connected with the tablet personal computer through a USB data line;
the tablet computer is internally provided with a calibration program, and when the calibration program runs on the tablet computer, the functions realized by the tablet computer comprise:
(a) and (4) control functions: controlling an angular displacement sensor position data acquisition module to start and stop, and acquiring angular displacement sensor position data;
(b) the loop self-checking function: when a certain signal loop of the angular displacement sensor position data acquisition module is not connected with the angular displacement sensor or the angular displacement sensor fails, prompting is carried out on a display interface of the tablet personal computer through corresponding text information;
(c) curve and value display functions: displaying the numerical values of the installation positions of the alpha 1, alpha 2 and D8 angular displacement sensors and a motion process curve of the angular displacement sensors formed in the whole calibration process; each signal loop is displayed on an interface in an independent curve window and numerical value mode, the abscissa of the window is time, the unit is s, the ordinate is a digital value, the unit is bit, and the display refreshing period is not less than 500 ms;
(d) data storage function: manually setting the data starting storage time and the data ending storage time for the digital value of the installation position of any angular displacement sensor to store data;
(e) data analysis function: performing timely data analysis on the stored data on a display interface of the tablet personal computer, wherein the timely data analysis comprises calculating a mean value, a variance and a jumping amount, and performing playback analysis on the stored historical data;
(f) a recording function: the trace of the calibration device being operated and the fault condition are recorded.
Preferably, the angular displacement sensor position data acquisition module comprises a CPU processor, a power supply circuit, 3 excitation/feedback circuits, 3 conditioning circuits, an a/D conversion circuit, a power-on reset circuit, an external watchdog circuit, a USB communication circuit, and a 422 communication circuit; one end of the 3-path excitation circuit/feedback circuit is respectively connected with the 3 angular displacement sensors, the other end of the 3-path excitation circuit/feedback circuit is respectively connected with one end of the 3-path conditioning circuit, the other end of the 3-path conditioning circuit is respectively connected with the input end of the A/D conversion circuit, the output end of the A/D conversion circuit is connected with the CPU processor, and the CPU processor is connected with the USB communication circuit and then connected with the tablet personal computer through the USB data line; the CPU processor is in data transmission with the tablet personal computer through the USB communication circuit, the tablet personal computer sends a starting instruction to the angular displacement sensor position data acquisition module through the USB communication circuit, and the A/D conversion circuit is controlled to acquire data of the positions of the angular displacement sensors; the power-on reset circuit, the external watchdog circuit and the 422 communication circuit are all connected to the CPU processor; the power supply circuit supplies power to all other circuits in the angular displacement sensor position data acquisition module; the excitation/feedback circuit is used for providing excitation required by the angular displacement sensor, receiving a feedback signal of the angular displacement sensor and processing the feedback signal into a direct current signal which can be collected by the A/D conversion circuit; the A/D conversion circuit is used for converting the feedback signal of the angular displacement sensor into a digital signal and providing the digital signal to the CPU for collection; the external watchdog circuit is used for monitoring the operation of the CPU processor;
preferably, the CPU processor adopts an LPC2468 microcontroller designed based on an ARM7TDMI-S kernel.
Preferably, the power circuit of the angular displacement sensor position data acquisition module comprises a rechargeable lithium battery and a power chip; the 220V mains supply charges the rechargeable lithium battery, the power supply chip converts 5V voltage provided by the rechargeable lithium battery into 3.3V digital voltage and +/-15V analog voltage respectively, the 3.3V voltage supplies power for the CPU processor, the 422 communication circuit, the external watchdog circuit and the power-on reset circuit, and the +/-15V analog voltage supplies power for the 3-way excitation/feedback circuit; the power supply chip supplies power according to the specific type of the A/D converter used by the A/D conversion circuit.
Preferably, the excitation/feedback circuit comprises an excitation output circuit and a feedback circuit, the excitation output circuit outputs 400Hz and 9V square wave signals to the angular displacement sensor, and the feedback circuit is used for receiving sinusoidal signals fed back by the angular displacement sensor and processing the sinusoidal signals into 3V or 5V direct current signals for the A/D conversion circuit to collect.
Preferably, the display interface of the tablet computer comprises a control area and a display area, wherein the control area comprises a data receiving button for starting a calibration program to start receiving acquired data and a data receiving stopping button for stopping the calibration program to receive the acquired data, a coding button for setting a display form of the data of the installation position of the angular displacement sensor, a recording button for controlling the storage of the acquired data, an analysis button for viewing and analyzing a data curve and an operation button for recording the operation trace and the fault reporting condition of the calibration device; the display area comprises a display frame for displaying the connection state of the tablet personal computer and the angular displacement sensor position data acquisition module through a USB data line, a display frame for displaying the angular displacement sensor installation position data in real time and a display frame for displaying the acquired data curve.
Preferably, the data of the installation position of the angular displacement sensor is provided with a plurality of display forms, including hexadecimal, binary, bit value and physical value, and the data of the installation position of the angular displacement sensor is displayed by selecting one form from the hexadecimal, binary, bit value and physical value through a coding button of a display interface of a tablet computer by a user.
On the other hand, the invention also provides a method for calibrating the installation position of the angular displacement sensor by adopting the portable calibration device for the installation position of the angular displacement sensor, which comprises the following steps:
step 1, connecting an angular displacement sensor position data acquisition module with a fan compressor guide vane angular displacement sensor alpha 1, a high-pressure compressor guide vane angular displacement sensor alpha 2 and a nozzle area angular displacement sensor D8 which are installed on an aircraft engine through a connecting plug and a cable, and starting an operation terminal;
step 2, controlling an angular displacement sensor position data acquisition module to acquire data of the installation position of the angular displacement sensor through an operation terminal;
step 3, storing position data corresponding to the movement position of the angular displacement sensor in the calibration process in the operation terminal, forming a curve, displaying the curve on a display interface of the operation terminal, and simultaneously displaying the maximum value, the minimum value and the average value of the installation position of the angular displacement sensor;
and if the maximum value or the minimum value of the position data of the angular displacement sensor displayed on the interface of the operation terminal is not in the position data range specified in the factory test file of the aircraft engine, adjusting the installation position of the corresponding angular displacement sensor, moving the angular displacement sensor by using a pressing device, and observing whether the data of the positions at the two ends of the angular displacement sensor are qualified or not in real time until the adjustment is qualified.
Preferably, the position data collected in step 2 is analog quantity, the analog quantity is converted into digital quantity through an a/D conversion circuit, and the digital quantity is displayed on a display interface of the operation terminal in real time; a user selects one of the multiple coding forms of hexadecimal, binary, bit value and physical value to display the data of the installation position of the angular displacement sensor by operating a coding button on a display interface of the terminal.
According to the technical scheme, the invention has the beneficial effects that: according to the portable calibration device and the calibration method for the mounting position of the angular displacement sensor, the mounting position of the angular displacement sensor is collected by the angular displacement sensor position data collection module mounted on the portable pad, and the portable calibration device and the calibration method are displayed and processed through the built-in calibration program, so that the portable calibration for the position of the angular displacement sensor is performed in advance after the engine is assembled, the calibration process is changed, and the productivity of the ground test of the engine is improved.
Drawings
Fig. 1 is a block diagram of a portable calibration device for an installation location of an angular displacement sensor according to an embodiment of the present invention;
FIG. 2 is a functional block diagram of a CPU processor and its peripheral circuits according to an embodiment of the present invention;
FIG. 3 is a functional block diagram of a power circuit provided in an embodiment of the present invention;
FIG. 4 is a functional block diagram of a stimulus/feedback circuit provided by an embodiment of the present invention;
FIG. 5 is a functional block diagram of an A/D conversion circuit according to an embodiment of the present invention;
fig. 6 is a schematic view of a display interface of an operation terminal according to an embodiment of the present invention, where (a) is a startup entry screen, and (b) is a curved display interface;
FIG. 7 is a schematic diagram of the connection distance between the portable calibration device and the cable and plug for the mounting location of the angular displacement sensor according to an embodiment of the present invention;
fig. 8 is a diagram of a portable calibration device for an angular displacement sensor mounting location in relation to cabling and plugs provided by an embodiment of the present invention.
Detailed Description
The following detailed description of embodiments of the present invention is provided in connection with the accompanying drawings and examples. The following examples are intended to illustrate the invention but are not intended to limit the scope of the invention.
In this embodiment, taking an aircraft engine of a certain factory as an example, the portable calibration device and the calibration method for the installation position of the angular displacement sensor are used for performing position detection and calibration on a fan compressor guide vane angular displacement sensor α 1, a high-pressure compressor guide vane angular displacement sensor α 2 and a nozzle area angular displacement sensor D8 of the aircraft engine.
The invention provides a portable calibration device for the mounting position of an angular displacement sensor, which comprises an operation terminal, a USB data line, a back clip, a connecting plug and a cable, as shown in figure 1. The operation terminal is a tablet personal computer, the back clamp is installed on the operation terminal shell, the back clamp is internally provided with an angular displacement sensor position data acquisition module, one end of the angular displacement sensor position data acquisition module is connected with a measured angular displacement sensor through a connecting plug and a cable, and the other end of the angular displacement sensor position data acquisition module is connected with the tablet personal computer through a USB data line;
the tablet computer is internally provided with a calibration program, and when the calibration program runs on the tablet computer, the functions realized by the tablet computer comprise:
(a) and (4) control functions: controlling an angular displacement sensor position data acquisition module to start and stop acquiring angular displacement sensor position data;
(b) the loop self-checking function: when a certain signal loop of the angular displacement sensor position data acquisition module is not connected with the angular displacement sensor or the angular displacement sensor fails, a display interface of the tablet personal computer is prompted through corresponding text information. The three angular displacement sensors form three signal acquisition loops with 3 exciting/feedback circuits, an A/D circuit, a CPU processor and a built-in calibration program of a tablet computer through cables and plugs.
(c) Curve and value display functions: displaying the numerical values of the installation positions of the alpha 1, alpha 2 and D8 angular displacement sensors and a motion process curve of the angular displacement sensors formed in the whole calibration process; each signal loop is displayed on an interface in an independent curve window and numerical value mode, the abscissa of the window is time, the unit is s, the ordinate is a digital value, the unit is bit, and the display refreshing period is not less than 500 ms;
(d) data storage function: manually setting the data starting storage time and the data ending storage time for the digital value of the installation position of any angular displacement sensor to store data;
(e) data analysis function: performing timely data analysis on the stored data on a display interface of the tablet personal computer, wherein the timely data analysis comprises calculating a mean value, a variance and a jumping amount, and performing playback analysis on the stored historical data;
(f) a recording function: the trace of the calibration device being operated and the fault condition are recorded.
An angular displacement sensor position data acquisition module, as shown in fig. 1, includes a CPU processor, a power supply circuit, 3 pieces of ii 110 excitation/feedback circuit, 3 pieces of conditioning circuit, an a/D conversion circuit, a power-on reset circuit, an external watchdog circuit, a USB communication circuit, and a 422 communication circuit; one end of a 3 II 110 excitation circuit/feedback circuit is connected with the 3 angular displacement sensors respectively, the other end of the 3 II 110 excitation circuit/feedback circuit is connected with one end of a 3-way conditioning circuit respectively, the other end of the 3-way conditioning circuit is connected with the input end of an A/D conversion circuit, the output end of the A/D conversion circuit is connected with a CPU processor, and the CPU processor is further connected with a tablet computer through a USB data line; the power-on reset circuit, the external watchdog circuit, the USB communication circuit and the 422 communication circuit are all connected to the CPU processor; the CPU processor is in data transmission with the tablet personal computer through the USB communication circuit, the tablet personal computer sends a starting instruction to the angular displacement sensor position data acquisition module through the USB communication circuit, and the A/D conversion circuit is controlled to acquire data of the positions of the angular displacement sensors; the power supply circuit supplies power to all circuits in the angular displacement sensor position data acquisition module; the excitation/feedback circuit is used for providing excitation required by the angular displacement sensor, receiving a feedback signal of the angular displacement sensor and processing the feedback signal into a direct current signal which can be collected by the A/D conversion circuit; the A/D conversion circuit is used for converting the feedback signal of the angular displacement sensor into a digital signal and providing the digital signal to the CPU for collection; the external watchdog circuit is used for monitoring the operation of the CPU processor;
in this embodiment, the CPU processor adopts an LPC2468 microcontroller designed based on an ARM7TDMI-S core, and as shown in fig. 2, the CPU processor includes a Flash program memory in 512kB chip, an SRAM in 98kB chip, a USB2.0 full-speed dual-port device/host/OTG controller, and has an on-chip PHY and a related DMA controller; the CPU processor comprises external functions such as 1 10/100 Ethernet Media Access Controller (MAC), 4 UARTs, 2-way Controller Area Network (CAN) channels, 1 SPI interface, 2 Synchronous Serial Ports (SSP), 3I 2C interfaces and 1I 2S interface, an SD/MMC memory card interface, 4 universal timers/counters, 2 PWM/timer modules, a watchdog timer (WDT) and the like, and meets the functional requirements of the CPU processor.
Although the CPU is provided with an internal watchdog, the CPU is provided with an external watchdog for safety, and the operation of the CPU is monitored. And a path of UART of the CPU is led out to carry out RS422 communication for use in debugging and troubleshooting. In order to ensure the normal work of the CPU inner core, a power-on reset circuit is arranged on a reset pin of the CPU. The clock signal of 12MHz is directly provided for CPU to use through an external crystal oscillator.
The portable calibration device for the installation position of the angular displacement sensor mainly transmits a sensor feedback signal acquired by a CPU (central processing unit) to a tablet personal computer through a USB (universal serial bus), the tablet personal computer receives data and then displays the data on a screen, and the tablet personal computer can also issue an instruction to the CPU through the USB to start data acquisition, enter a sleep mode and other functions.
The CPU processor provided by the embodiment is provided with the USB2.0 and the PHY and the DMA controller in the chip, so that the USB directly led out of the CPU processor can be in communication connection with the flat plate.
A power circuit of an angular displacement sensor position data acquisition module, as shown in fig. 3, includes a rechargeable lithium battery and a power chip; the 220V mains supply charges the rechargeable lithium battery, the power supply chip converts 5V voltage provided by the rechargeable lithium battery into 3.3V digital voltage and +/-15V analog voltage respectively, the 3.3V voltage supplies power for the CPU processor, the 422 communication circuit, the external watchdog circuit and the power-on reset circuit, and the +/-15V analog voltage supplies power for the 3-way excitation/feedback circuit; the power supply chip supplies power according to the specific type of the A/D converter used by the A/D conversion circuit.
The 3-way II 110 excitation/feedback circuit, as shown in fig. 4, includes an excitation output circuit and a feedback circuit, the excitation output circuit outputs 400Hz and 9V square wave signals to the angular displacement sensor, and the feedback circuit is configured to receive sinusoidal signals fed back by the angular displacement sensor and process the sinusoidal signals into 3V or 5V dc signals for the a/D conversion circuit to acquire.
The a/D conversion circuit, as shown in fig. 5, includes a signal RC filter circuit, a multi-way switch, an operational amplifier, and an a/D conversion chip, completes the acquisition of the feedback signal of the 3-way sensor, and finally outputs a digital signal to the CPU. The A/D conversion chip selects 14-bit successive approximation ADC-AD 7899, the sampling time is 2.5us, a 2.5V precision reference source is additionally arranged, the conversion of analog quantity signal input is completed through the access control of a CPU, and data are transmitted to the CPU through a parallel bus interface.
A display interface of the tablet computer, as shown in fig. 6(a) and (b), including a control area and a display area, where the control area includes a data receiving button for starting a calibration program to start receiving collected data, a data receiving stopping button for stopping the calibration program to receive the collected data, a coding button for setting a display form of data of an installation position of the angular displacement sensor, a recording button for controlling the collected data to be stored, an analysis button for viewing and analyzing a data curve, and an operation button for recording an operation trace and an accident situation of the calibration device; the display area comprises a display frame for displaying the connection state of the tablet personal computer and the back clip through the USB data line, three display frames for displaying the data of the mounting positions of the three angular displacement sensors in real time and a display frame for displaying the acquired data curve. In this embodiment, fig. 6(a) is a power-on entry screen, fig. 6(b) is a curve display interface, a data receiving button in the power-on screen of fig. 6(a) is clicked, acquired real-time data is displayed in a display frame of mounting position data of three angular displacement sensors on a display screen of a tablet computer, a coding button is clicked to select a coding form of the acquired position data, analysis buttons corresponding to the three angular displacement sensors α 1, α 2, and D8 are clicked, and a maximum value, a minimum value, an average value of the mounting positions of the angular displacement sensors α 1, α 2, and D8, and a motion process curve of the angular displacement sensors formed in the whole calibration process are displayed on the curve display interface of fig. 6 (b). And clicking the record button to store the position data, and clicking the record button again to stop storing the position data. Clicking the operation button records the operated trace of the calibration device and the failure reporting condition. And clicking the stop receiving button to stop collecting the position data of the angular displacement sensor.
The data of the mounting position of the angular displacement sensor displayed on the display interface of the tablet personal computer is provided with a plurality of display forms including hexadecimal, binary, bit value and physical value, and a user selects one form to display the data of the mounting position of the angular displacement sensor through a coding button of the display interface of the operation terminal.
The invention also provides a method for calibrating the installation position of the angular displacement sensor by adopting the portable calibration device for the installation position of the angular displacement sensor, which comprises the following steps:
step 1, connecting an angular displacement sensor position data acquisition module with a fan compressor guide vane angular displacement sensor alpha 1, a high-pressure compressor guide vane angular displacement sensor alpha 2 and a nozzle area angular displacement sensor D8 which are installed on an aircraft engine through a connecting plug and a cable, and starting an operation terminal. In this embodiment, as shown in fig. 7 and 8, the angular displacement sensor position data acquisition module is connected with three angular displacement sensors through a socket X1z, a plug X1t, a plug X55, and two cables with lengths of 0.05m and 10m, respectively.
Step 2, controlling an angular displacement sensor position data acquisition module to acquire data of the installation position of the angular displacement sensor through an operation terminal; the acquired position data is analog quantity, the analog quantity is converted into digital quantity through an A/D conversion circuit, and the digital quantity is displayed on a display interface of the operation terminal in real time; a user selects one of the multiple coding forms of hexadecimal, binary, bit value and physical value to display the data of the installation position of the angular displacement sensor by operating a coding button on a display interface of the terminal.
Step 3, storing position data corresponding to the movement position of the angular displacement sensor in the calibration process in the operation terminal, forming a curve, displaying the curve on a display interface of the operation terminal, and simultaneously displaying the maximum value, the minimum value and the average value of the installation position of the angular displacement sensor; the average value of the acquired angular displacement sensor position data is only used as a reference value and is not used as a judgment basis.
And 4, comparing the maximum value and the minimum value of the installation positions of the angular displacement sensors displayed on the interface of the operation terminal with the position data ranges of the three angular displacement sensors specified in the factory test file of the aircraft engine.
And if the maximum value or the minimum value of the position data of the angular displacement sensor displayed on the interface of the operation terminal is not in the position data range specified in the factory test file of the aircraft engine, adjusting the installation position of the corresponding angular displacement sensor, moving the angular displacement sensor by using a pressing device, and observing whether the data of the positions at the two ends of the angular displacement sensor are qualified or not in real time until the adjustment is qualified.
The position data ranges of the three angular displacement sensors specified in the aircraft engine factory test file are as follows:
the angular displacement sensor α 1 has position data ranges of: the minimum value range is 500-600 bits, and the maximum value range is 3800-4000 bits:
the angular displacement sensor α 2 has position data ranges of: the minimum value range is 400-500 bits, and the maximum value range is 2800-3000 bits;
the angular displacement sensor D8 has position data ranges of: the minimum value range is 200-300 bits, and the maximum value range is 4800-5000 bits.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit of the corresponding technical solutions and scope of the present invention as defined in the appended claims.
Claims (7)
1. A portable calibrating device of angular displacement sensor mounted position which characterized in that: the USB interface device comprises an operation terminal, a USB data line, a back clip, a connecting plug and a cable; the operation terminal is a tablet computer; the back clamp is arranged on the shell of the tablet personal computer, an angular displacement sensor position data acquisition module is arranged in the back clamp, and one end of the angular displacement sensor position data acquisition module is connected with the angular displacement sensor to be detected through a connecting plug and a cable; the other end of the angular displacement sensor position data acquisition module is connected with the tablet personal computer through a USB data line;
the tablet computer is internally provided with a calibration program, and when the calibration program runs on the tablet computer, the functions realized by the tablet computer comprise:
(a) and (4) control functions: controlling an angular displacement sensor position data acquisition module to start and stop, and acquiring angular displacement sensor position data;
(b) the loop self-checking function: when a certain signal loop of the angular displacement sensor position data acquisition module is not connected with the angular displacement sensor or the angular displacement sensor fails, prompting is carried out on a display interface of the tablet personal computer through corresponding text information;
(c) curve and value display functions: displaying the numerical values of the installation positions of the alpha 1, alpha 2 and D8 angular displacement sensors and a motion process curve of the angular displacement sensors formed in the whole calibration process; each signal loop is displayed on an interface in an independent curve window and numerical value mode, the abscissa of the window is time, the unit is s, the ordinate is a digital value, the unit is bit, and the display refreshing period is not less than 500 ms;
(d) data storage function: manually setting the time for starting and ending storage of the digital value for the digital value of any angular displacement sensor mounting position for data storage;
(e) data analysis function: performing timely data analysis on the stored data on a display interface of the tablet personal computer, wherein the timely data analysis comprises calculating a mean value, a variance and a jumping amount, and performing playback analysis on the stored historical data;
(f) a recording function: recording the operated trace and the failure reporting condition of the calibration device;
the angular displacement sensor position data acquisition module comprises a CPU (central processing unit) processor, a power supply circuit, a 3-way excitation/feedback circuit, a 3-way conditioning circuit, an A/D (analog/digital) conversion circuit, a power-on reset circuit, an external watchdog circuit, a USB (universal serial bus) communication circuit and a 422 communication circuit; one end of the 3-path excitation circuit/feedback circuit is respectively connected with the 3 angular displacement sensors, the other end of the 3-path excitation circuit/feedback circuit is respectively connected with one end of the 3-path conditioning circuit, the other end of the 3-path conditioning circuit is respectively connected with the input end of the A/D conversion circuit, the output end of the A/D conversion circuit is connected with the CPU processor, and the CPU processor is connected with the USB communication circuit and then connected with the tablet personal computer through the USB data line; the CPU processor is in data transmission with the tablet personal computer through the USB communication circuit, the tablet personal computer sends a starting instruction to the angular displacement sensor position data acquisition module through the USB communication circuit, and the A/D conversion circuit is controlled to acquire data of the positions of the angular displacement sensors; the power-on reset circuit, the external watchdog circuit and the 422 communication circuit are all connected to the CPU processor; the power supply circuit supplies power to all other circuits in the angular displacement sensor position data acquisition module; the excitation/feedback circuit is used for providing excitation required by the angular displacement sensor, receiving a feedback signal of the angular displacement sensor and processing the feedback signal into a direct current signal which can be collected by the A/D conversion circuit; the A/D conversion circuit is used for converting the feedback signal of the angular displacement sensor into a digital signal and providing the digital signal to the CPU for collection; the external watchdog circuit is used for monitoring the operation of the CPU processor;
the display interface of the tablet personal computer comprises a control area and a display area, wherein the control area comprises a data receiving button for starting a calibration program to start receiving acquired data, a data receiving stopping button for stopping the calibration program to receive the acquired data, a coding button for setting the display form of the data of the installation position of the angular displacement sensor, a recording button for controlling the acquired data to be stored, an analysis button for viewing and analyzing a data curve and an operation button for recording the operation trace and the failure reporting condition of the calibration device; the display area comprises a display frame for displaying the connection state of the tablet personal computer and the angular displacement sensor position data acquisition module through a USB data line, a display frame for displaying the angular displacement sensor installation position data in real time and a display frame for displaying the acquired data curve;
the angular displacement sensor position data acquisition module is connected with a fan compressor guide vane angular displacement sensor alpha 1, a high-pressure compressor guide vane angular displacement sensor alpha 2 and a nozzle area angular displacement sensor D8 which are installed on the aircraft engine through a connecting plug and a cable, and the operation terminal is started;
the operation terminal controls the angular displacement sensor position data acquisition module to acquire data of the installation position of the angular displacement sensor;
storing position data corresponding to the movement position of the angular displacement sensor in the calibration process in the operation terminal, forming a curve, displaying the curve on a display interface of the operation terminal, and simultaneously displaying the maximum value, the minimum value and the average value of the installation position of the angular displacement sensor;
comparing the maximum value and the minimum value of the installation positions of the angular displacement sensors displayed on an operation terminal interface with the position data ranges of the three angular displacement sensors specified in an aircraft engine delivery test file;
and if the maximum value or the minimum value of the position data of the angular displacement sensor displayed on the interface of the operation terminal is not in the position data range specified in the factory test file of the aircraft engine, adjusting the installation position of the corresponding angular displacement sensor, moving the angular displacement sensor by using a pressing device, and observing whether the data of the positions at the two ends of the angular displacement sensor are qualified or not in real time until the adjustment is qualified.
2. The portable calibration device for the mounting position of an angular displacement sensor according to claim 1, wherein: the CPU processor adopts an LPC2468 microcontroller designed based on an ARM7TDMI-S inner core.
3. The portable calibration device for the mounting position of an angular displacement sensor according to claim 1, wherein: the power supply circuit comprises a rechargeable lithium battery and a power supply chip; the 220V mains supply charges the rechargeable lithium battery, the power supply chip converts 5V voltage provided by the rechargeable lithium battery into 3.3V digital voltage and +/-15V analog voltage respectively, the 3.3V voltage supplies power for the CPU processor, the 422 communication circuit, the external watchdog circuit and the power-on reset circuit, and the +/-15V analog voltage supplies power for the 3-way excitation/feedback circuit; the power supply chip supplies power according to the specific type of the A/D converter used by the A/D conversion circuit.
4. The portable calibration device for the mounting position of an angular displacement sensor according to claim 1, wherein: the excitation/feedback circuit comprises an excitation output circuit and a feedback circuit, the excitation output circuit outputs 400Hz and 9V square wave signals to the angular displacement sensor, and the feedback circuit is used for receiving sinusoidal signals fed back by the angular displacement sensor and processing the sinusoidal signals into 3V or 5V direct current signals for the A/D conversion circuit to collect.
5. The portable calibration device for the mounting position of an angular displacement sensor of claim 4, wherein: the data of the mounting position of the angular displacement sensor is provided with a plurality of display forms, including hexadecimal, binary, bit value and physical value, and a user selects one form of the display forms to display the data of the mounting position of the angular displacement sensor through a coding button of a display interface of a tablet personal computer.
6. A portable calibration method for a mounting position of an angular displacement sensor, which is performed by using the portable calibration device for a mounting position of an angular displacement sensor according to claim 1, wherein: the method comprises the following steps:
step 1, connecting an angular displacement sensor position data acquisition module on a portable calibration device of an angular displacement sensor installation position with a fan compressor guide vane angular displacement sensor alpha 1, a high-pressure compressor guide vane angular displacement sensor alpha 2 and a nozzle area angular displacement sensor D8 which are installed on an aircraft engine through a connecting plug and a cable, and starting an operation terminal;
step 2, controlling an angular displacement sensor position data acquisition module to acquire data of the installation position of the angular displacement sensor through an operation terminal;
step 3, storing position data corresponding to the movement position of the angular displacement sensor in the calibration process in the operation terminal, forming a curve, displaying the curve on a display interface of the operation terminal, and simultaneously displaying the maximum value, the minimum value and the average value of the installation position of the angular displacement sensor;
step 4, comparing the maximum value and the minimum value of the installation positions of the angular displacement sensors displayed on the interface of the operation terminal with the position data ranges of the three angular displacement sensors specified in the factory test file of the aircraft engine;
and if the maximum value or the minimum value of the position data of the angular displacement sensor displayed on the interface of the operation terminal is not in the position data range specified in the factory test file of the aircraft engine, adjusting the installation position of the corresponding angular displacement sensor, moving the angular displacement sensor by using a pressing device, and observing whether the data of the positions at the two ends of the angular displacement sensor are qualified or not in real time until the adjustment is qualified.
7. The portable calibration method for the mounting position of an angular displacement sensor according to claim 6, wherein: the position data collected in the step 2 is analog quantity, the analog quantity is converted into digital quantity through an A/D conversion circuit, and the digital quantity is displayed on a display interface of the operation terminal in real time; a user selects one of the multiple coding forms of hexadecimal, binary, bit value and physical value to display the data of the installation position of the angular displacement sensor by operating a coding button on a display interface of the terminal.
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