CN112683321B - Angular position calibration device of handheld angular displacement sensor - Google Patents
Angular position calibration device of handheld angular displacement sensor Download PDFInfo
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- CN112683321B CN112683321B CN202011590725.2A CN202011590725A CN112683321B CN 112683321 B CN112683321 B CN 112683321B CN 202011590725 A CN202011590725 A CN 202011590725A CN 112683321 B CN112683321 B CN 112683321B
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Abstract
The invention relates to the technical field of signal processing of an aeroengine angular displacement sensor, and particularly discloses a handheld angular displacement sensor angular position calibration device which comprises a CPU core circuit, a power supply circuit, a 3-way excitation/feedback circuit, an A/D conversion circuit and a touch panel, wherein the 3-way excitation/feedback circuit comprises a 3-way angular displacement excitation circuit and a 3-way feedback processing circuit, the CPU core circuit is respectively connected with a crystal oscillator, a power-on reset circuit, an RS422 communication circuit, a watchdog circuit, the 3-way angular displacement excitation circuit, the A/D conversion circuit and the touch panel, and the A/D conversion circuit is also connected with the 3-way feedback processing circuit. The angle position calibration device for the handheld angle displacement sensor provided by the invention can greatly improve the angle position calibration efficiency of the angle displacement sensor, can realize automatic storage and real-time analysis of data while realizing position calibration, and is convenient for subsequent data backtracking.
Description
Technical Field
The invention relates to the technical field of signal processing of an aeroengine angular displacement sensor, in particular to a handheld angular displacement sensor angular position calibration device.
Background
At present, the installation positions of a fan compressor guide vane sensor, a high-pressure compressor guide vane sensor and a nozzle area sensor cannot be corrected due to lack of acquisition equipment on an engine assembly site, the engine assembly is required to be completed and transported to a test bed, the position of the sensor is calibrated by using a digital electronic controller of the engine, and if the position is incorrectly installed, the position of the sensor is required to be reworked and adjusted, so that the test progress is influenced.
Disclosure of Invention
The invention aims to overcome the defects in the prior art, and provides a handheld angular displacement sensor angular position calibration device which can solve the problem that the angular position calibration of an aero-engine angular displacement sensor is inconvenient in an assembly workshop, can meet the requirements of an engine assembly site, can calibrate the angle of the angular displacement sensor conveniently, quickly and accurately, and shortens the test run debugging period of the engine.
As a first aspect of the present invention, there is provided a handheld angular displacement sensor angular position calibration apparatus, including a CPU core circuit, a power supply circuit, a 3-way excitation/feedback circuit, an a/D conversion circuit, and a touch panel, wherein the 3-way excitation/feedback circuit includes a 3-way angular displacement excitation circuit and a 3-way feedback processing circuit, the CPU core circuit is respectively connected to a crystal oscillator, a power-on reset circuit, an RS422 communication circuit, a watchdog circuit, a 3-way angular displacement excitation circuit, an a/D conversion circuit, and a touch panel, and the a/D conversion circuit is further connected to the 3-way feedback processing circuit, and the power supply circuit is configured to supply power to the CPU core circuit, the 3-way excitation/feedback circuit, and the a/D conversion circuit.
Further, the 3-path angular displacement excitation circuit is used for outputting excitation signals to the angular displacement sensor, and the angular displacement sensor starts to work; the 3-path feedback processing circuit is used for receiving the feedback signal output by the angular displacement sensor and processing the feedback signal into a direct current signal which can be acquired by the A/D conversion circuit; the A/D conversion circuit is responsible for converting the processed direct current signals into digital signals and providing the digital signals for the CPU core circuit to collect through a data parallel bus; and the CPU core circuit transmits the acquired data to the touch panel through a USB interface for display and storage.
Further, the 3-path angular displacement excitation circuit comprises an alpha 1 angular displacement excitation circuit, an alpha 2 angular displacement excitation circuit and a D8 angular displacement excitation circuit, the 3-path feedback processing circuit comprises an alpha 1 feedback processing circuit, an alpha 2 feedback processing circuit and a D8 feedback processing circuit, wherein the angular displacement sensor comprises an alpha 1 sensor, an alpha 2 sensor and a D8 sensor, the alpha 1 sensor is an engine fan inlet guide vane sensor, the alpha 2 sensor is a compressor inlet guide vane sensor, and the D8 sensor is a nozzle area sensor.
Further, the CPU core circuit adopts an LPC2468 microcontroller designed based on an ARM7TDMI-S kernel.
Further, the power supply circuit comprises a 5V-to-3.3V power supply chip, a 5V-to-15V power supply chip and a 5V-to-15V power supply chip, wherein the 5V-to-3.3V power supply chip is used for supplying power to the crystal oscillator, the CPU core circuit, the RS422 communication circuit and the watchdog circuit.
Further, the A/D conversion circuit comprises an RC filter circuit, a multi-way switch, an operational amplifier chip and an A/D conversion chip.
Further, the touch panel is an explosion-proof type strong panel.
Further, each angular displacement excitation circuit comprises a CPU chip D1, an analog switch D2, a first operational amplifier chip N1, a first triode N2, a second triode N3, a first capacitor C1, a second capacitor C2, a third capacitor C3, a first resistor R1, a second resistor R2, a third resistor R3 and a fourth resistor R4, wherein the CPU chip D1 is connected with the analog switch D2, the analog switch D2 is respectively connected with the first capacitor C1, the second capacitor C2, the third capacitor C3, the first resistor R1 and the second resistor R2, the analog switch D2 is also connected with the positive input end of the first operational amplifier chip N1, the negative input end of the first operational amplifier chip N1 is connected with the output end of the first operational amplifier chip N1, the output end of the first operational amplifier chip N1 is connected with the third resistor R3, the third resistor R3 is respectively connected with the fourth resistor R4, the base electrode of the first triode N2, the base electrode of the second triode N3 is connected with the triode N3.
Further, each feedback processing circuit comprises a second operational amplifier chip N4, a third operational amplifier chip N5, a fourth operational amplifier chip N6, a fifth operational amplifier chip N7, a fifth resistor R5, a sixth resistor R6, a seventh resistor R7, an eighth resistor R8, a ninth resistor R9, a tenth resistor R10, an eleventh resistor R11, a twelfth resistor R12, a thirteenth resistor R13, a fourth capacitor C4, a fifth capacitor C5, a sixth capacitor C6, a first diode VD1 and a second diode VD2, wherein the positive input end of the second operational amplifier chip N4 is connected with the fifth resistor R5, the negative input end of the second operational amplifier chip N4 is connected with the seventh resistor R7, the output end of the second operational amplifier chip N4 is connected with the positive input end of the third operational amplifier chip N5, the negative input end of the third operational amplifier chip N5 is respectively connected with the negative electrodes of the sixth resistor R6 and the first diode 1, the output end of the third operational amplifier chip N5 is respectively connected with the positive electrode of the first diode VD1 and the negative electrode of the second diode VD2, the positive electrode of the second diode VD2 is respectively connected with a sixth resistor R6 and an eighth resistor R8, the seventh resistor R7 is connected with a ninth resistor R9, the eighth resistor R8 is connected to the negative input end of the fourth operational amplifier chip N6, the positive input end of the fourth operational amplifier chip N6 is grounded, the output end of the fourth operational amplifier chip N6 is respectively connected with a ninth resistor R9 and a tenth resistor R10, the tenth resistor R10 is respectively connected with an eleventh resistor R11 and a fourth capacitor C4, the eleventh resistor R11 is respectively connected with a twelfth resistor R12 and a sixth capacitor C6, the twelfth resistor R12 is respectively connected with a thirteenth resistor R13 and a fifth capacitor C5, the sixth capacitor C6 is connected to the negative input end of the fifth operational amplifier chip N7, the positive input end of the fifth operational amplifier chip N7 is connected with the thirteenth resistor R13.
The handheld angular displacement sensor angular position calibration device provided by the invention has the following advantages: injecting an excitation signal into the angular displacement sensor through the device, and simultaneously receiving a feedback signal of the angular displacement sensor and processing the feedback signal into a direct current signal which can be acquired by an A/D conversion circuit; the A/D conversion circuit is responsible for converting the processed direct current signals fed back by the sensor into digital signals, the digital signals are provided for the CPU core circuit for collection through the data parallel bus, the CPU core circuit transmits collected data to the touch panel through the USB interface for display and storage, the efficiency of angular position calibration of the angular displacement sensor is greatly improved, the device can realize automatic storage and real-time analysis of the data while realizing position calibration, and the subsequent data backtracking is facilitated; in addition, the device is a handheld flat plate structure, and is convenient for assembly on-site debugging, calibration and use.
Drawings
The accompanying drawings are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate the invention and together with the description serve to explain, without limitation, the invention.
Fig. 1 is a schematic block diagram of a hand-held angular displacement sensor angular position calibration device according to the present invention.
Fig. 2 is a schematic block diagram of a CPU core circuit provided by the present invention.
Fig. 3 is a schematic block diagram of a power supply circuit provided by the present invention.
FIG. 4 is a schematic diagram showing the connection relationship among the angular displacement excitation circuit, the angular displacement sensor, the feedback processing circuit and the A/D conversion circuit.
Fig. 5 is a schematic block diagram of an a/D conversion circuit according to the present invention.
Fig. 6 is a schematic structural diagram of an angular displacement excitation circuit provided by the invention.
Fig. 7 is a schematic structural diagram of a feedback processing circuit provided by the present invention.
Reference numerals illustrate: 1-a CPU core circuit; a 2-power supply circuit; 3-3 excitation/feedback circuits; a 4-A/D conversion circuit; 5-touch panel.
Detailed Description
In order to further describe the technical means and effects adopted by the invention to achieve the preset aim, the following detailed description refers to the specific implementation, structure, characteristics and effects of the handheld angular displacement sensor angular position calibration device according to the invention with reference to the accompanying drawings and the preferred embodiments. It will be apparent that the described embodiments are some, but not all, embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to fall within the scope of the invention.
In this embodiment, as shown in fig. 1, the handheld angular displacement sensor angular position calibration device includes a CPU core circuit 1, a power supply circuit 2, a 3-way excitation/feedback circuit 3, an a/D conversion circuit 4, and a touch panel 5, where the 3-way excitation/feedback circuit 3 includes a 3-way angular displacement excitation circuit and a 3-way feedback processing circuit, the CPU core circuit 1 is connected to a crystal oscillator, a power-on reset circuit, an RS422 communication circuit, a watchdog circuit, a 3-way angular displacement excitation circuit, an a/D conversion circuit 4, and a touch panel 5, and the a/D conversion circuit 4 is further connected to the 3-way feedback processing circuit, and the power supply circuit 2 is used to supply power to the CPU core circuit 1, the 3-way excitation/feedback circuit 3, and the a/D conversion circuit 4.
Preferably, as shown in fig. 2, the CPU core circuit 1 adopts an LPC2468 microcontroller based on an ARM7TDMI-S kernel design; in addition, the CPU core circuit 1 comprises 512kB on-chip Flash program memory, 98kB on-chip SRAM, USB2.0 full-speed dual-port device/host/OTG controller with on-chip PHY and associated DMA controller, 1 10/100 ethernet Media Access Controller (MAC), 4 UARTs, 2-way Controller Area Network (CAN) channels, 1 SPI interface, 2 Synchronous Serial Ports (SSPs), 3I 2C interfaces, 1I 2S interface, SD/MMC memory card interface, 4 universal timers/counters, 2 PWM/timer modules, watchdog timers (WDT) and other external functions, satisfying the functional requirements of the system; a UART of a CPU core circuit 1 is led out, RS422 communication is realized through an external RS422 communication circuit (comprising a MAX3490EESA chip), and the UART can be communicated with a computer through the RS422 communication circuit for debugging and troubleshooting; in order to ensure the normal operation of the core of the CPU core circuit 1, a power-on reset circuit is arranged on a reset pin of the CPU core circuit 1; the external crystal oscillator outputs 12MHz clock frequency to the CPU core circuit 1, and the clock frequency is used as the main frequency of the CPU core circuit 1; the JTAG interface is used for debugging and programming the program of the CPU chip; the CPU core circuit 1 is provided with a USB2.0 interface and can be directly connected with the touch panel 5 for transmitting signals to the touch panel 5 for display.
Although the CPU core circuit 1 is provided with an internal watchdog, for safety, the CPU core circuit 1 is further provided with an external watchdog, the chip model is STWD100, 100NYWY3F, the CPU core circuit 1 needs to feed the external watchdog at regular time, and the watchdog chip resets the CPU when the external watchdog is not fed for a certain time.
Preferably, as shown in fig. 3, the power circuit 2 includes a 5V to 3.3V power chip, a 5V to 15V power chip, and a 5V to-15V power chip, where the 5V to 3.3V power chip is used to supply power to the crystal oscillator, the CPU core circuit 1, the RS422 communication circuit, and the watchdog circuit, the 5V to 3.3V power chip is of the type SPX1117M3-3.3,5V V to 15V power chip is of the type TPS61081, and the 5V to-15V power chip is of the type TPS63700.
Specifically, when the device is charged, 220V mains supply is used for charging a rechargeable lithium battery, when the rechargeable lithium battery is used for supplying power, a 5V-to-3.3V power chip in a power circuit 2 is used for converting 5V voltage provided by the lithium battery into 3.3V digital voltage, a 5V-to-15V power chip is used for converting 5V voltage provided by the lithium battery into 15V analog voltage, a 5V-to-15V power chip is used for converting 5V voltage provided by the lithium battery into-15V analog voltage, 3.3V voltage mainly supplies power for digital circuits such as a crystal oscillator, a CPU core circuit, an RS422 communication circuit, an external watchdog circuit and the like, the + -15V analog voltage is used for a feedback processing circuit, a +15V analog voltage is converted into + -6V voltage to be provided for an angular sensor to be used as excitation voltage, and the +15V analog voltage is converted into 2.5V reference voltage to be used for the A/D conversion circuit.
It should be noted that, since the device is a handheld device, in normal use, power is supplied from a rechargeable lithium battery.
Preferably, the 3-path angular displacement excitation circuit is used for outputting excitation signals to an angular displacement sensor, and the angular displacement sensor starts to work; the 3-path feedback processing circuit is used for receiving the feedback signal output by the angular displacement sensor and processing the feedback signal into a direct current signal which can be acquired by the A/D conversion circuit; the A/D conversion circuit is responsible for converting the processed direct current signals into digital signals and providing the digital signals for the CPU core circuit 1 for acquisition through a data parallel bus; the CPU core circuit 1 transmits the collected data to the touch panel 5 through a USB interface for display and storage.
Preferably, as shown in fig. 4, the 3-path angular displacement excitation circuit comprises an α1 angular displacement excitation circuit, an α2 angular displacement excitation circuit and a D8 angular displacement excitation circuit, the 3-path feedback processing circuit comprises an α1 feedback processing circuit, an α2 feedback processing circuit and a D8 feedback processing circuit, wherein the angular displacement sensor comprises an α1 sensor, an α2 sensor and a D8 sensor, the α1 sensor is an engine fan inlet guide vane sensor, the α2 sensor is a compressor inlet guide vane sensor, and the D8 sensor is a nozzle area sensor; the 3-path angular displacement excitation circuit converts 3.3V and 400Hz square wave signals provided by the CPU core circuit 1 into +/-6V and 400Hz square wave signals and provides the +/-6V and 400Hz square wave signals for the three angular displacement sensors, so that the three angular displacement sensors can work normally, the 3-path feedback processing circuit is responsible for receiving sine signals fed back by the corresponding angular displacement sensors, and the sine signals are processed into direct current voltages within 0-5V through internal full-wave rectification, voltage amplification and fourth-order low-pass filtering and provided for the following A/D conversion circuit to be collected.
Preferably, as shown in fig. 5, the a/D conversion circuit 4 includes an RC filter circuit, a multi-way switch, an op-amp chip, and an a/D conversion chip; the A/D conversion circuit completes the collection of 3 paths of sensor feedback signals, firstly, the processed direct current signals enter the multi-way switch after passing through the first-order passive RC filter circuit, one path of the three paths of feedback processing signals is sequentially selected by the multi-way switch to be amplified and then enter the A/D conversion chip, if only one path of sensor feedback signals need to be collected, the multi-way switch is controlled by the CPU core circuit 1 to always select the path of feedback signals to collect, and the A/D conversion chip receives the direct current signals and then converts the direct current signals into 14-bit digital signals through an internal A/D conversion function and transmits collected values to the CPU core circuit 1 through a parallel bus connected with the CPU core circuit 1.
Specifically, the A/D conversion chip selects 14-bit successive approximation type ADC-AD 7899, the sampling time is 2.5us, a 2.5V precision reference source is additionally added, the conversion of analog quantity signal input is completed through the access control of the CPU core circuit 1, and data is transmitted to the CPU core circuit 1 through a parallel bus interface.
Preferably, the touch panel 5 is an explosion-proof type solid panel, and the basic configuration of the explosion-proof type solid panel is as follows:
a) A processor: an intel pentium processor;
b) Memory: 4G DDR3;
c) Hard disk: 128GB;
d) Operating system: windows 7;
e) And (3) a display screen: 8.1 "display;
f) Lithium battery: 4200mAh;
g) Comprises an alternating current power adapter (65W, 100-240V AC,50/60 Hz).
Preferably, as shown in fig. 6, each angular displacement excitation circuit includes a CPU chip D1, an analog switch D2, a first operational amplifier chip N1, a first triode N2, a second triode N3, a first capacitor C1, a second capacitor C2, a third capacitor C3, a first resistor R1, a second resistor R2, a third resistor R3, and a fourth resistor R4, where the CPU chip D1 is connected to the analog switch D2, the analog switch D2 is respectively connected to the first capacitor C1, the second capacitor C2, the third capacitor C3, the first resistor R1, the second resistor R2, the analog switch D2 is further connected to the positive input end of the first operational amplifier chip N1, the negative input end of the first operational amplifier chip N1 is connected to the output end of the first operational amplifier chip N1, the output end of the first operational amplifier chip N1 is connected to the third resistor R3, and the third resistor R3 is respectively connected to the first resistor R4, the second triode N2, the emitter of the second triode N3, and the base of the third triode N2.
The CPU chip D1 generates a 400Hz/3.3V PWM signal, the signal controls the on-off of the analog switch D2, the analog switch D2 converts the input +10V and-10V signals and outputs a 400 Hz/+ -10V square wave signal, the square wave signal enters the first operational amplifier chip N1 and is then divided into 400 Hz/+ -6V square wave signals through the third resistor R3 and the fourth resistor R4, and the signals drive a push-pull circuit formed by the two triodes N2 and N3 to form excitation signals required by the sensor and provide the excitation signals for the sensor.
Preferably, as shown in fig. 7, each feedback processing circuit includes a second operational amplifier chip N4, a third operational amplifier chip N5, a fourth operational amplifier chip N6, a fifth operational amplifier chip N7, a fifth resistor R5, a sixth resistor R6, a seventh resistor R7, an eighth resistor R8, a ninth resistor R9, a tenth resistor R10, an eleventh resistor R11, a twelfth resistor R12, a thirteenth resistor R13, a fourth capacitor C4, a fifth capacitor C5, a sixth capacitor C6, a first diode VD1 and a second diode VD2, wherein a positive input end of the second operational amplifier chip N4 is connected to the fifth resistor R5, a negative input end of the second operational amplifier chip N4 is connected to the seventh resistor R7, an output end of the second operational amplifier chip N4 is connected to a positive input end of the third operational amplifier chip N5, a negative input end of the third operational amplifier chip N5 is respectively connected to a negative electrode of the sixth resistor R6 and the first diode VD1, the output end of the third operational amplifier chip N5 is respectively connected with the positive electrode of the first diode VD1 and the negative electrode of the second diode VD2, the positive electrode of the second diode VD2 is respectively connected with a sixth resistor R6 and an eighth resistor R8, the seventh resistor R7 is connected with a ninth resistor R9, the eighth resistor R8 is connected to the negative input end of the fourth operational amplifier chip N6, the positive input end of the fourth operational amplifier chip N6 is grounded, the output end of the fourth operational amplifier chip N6 is respectively connected with a ninth resistor R9 and a tenth resistor R10, the tenth resistor R10 is respectively connected with an eleventh resistor R11 and a fourth capacitor C4, the eleventh resistor R11 is respectively connected with a twelfth resistor R12 and a sixth capacitor C6, the twelfth resistor R12 is respectively connected with a thirteenth resistor R13 and a fifth capacitor C5, the sixth capacitor C6 is connected to the negative input end of the fifth operational amplifier chip N7, the positive input end of the fifth operational amplifier chip N7 is connected with the thirteenth resistor R13.
The sinusoidal signal fed back and input by the angular displacement sensor is processed by the second operational amplifier chip N4, then enters a precise full-wave rectifying circuit formed by the third operational amplifier chip N5, the first diode VD1, the second diode VD2 and the R5-R8 to be processed into steamed bread waves, and is amplified by an amplifying circuit formed by the fourth operational amplifier chip N6 and the fifth operational amplifier chip N7, and finally is filtered by a fourth-order low-pass filter circuit to generate a proper direct current signal.
The working process of the handheld angular displacement sensor angular position calibration device provided by the invention is as follows:
Firstly, connecting the handheld angular displacement sensor angular position calibration device with an angular displacement sensor on an engine through a cable;
Secondly, the output angle of the angular displacement sensor is regulated to be minimum and maximum through the pressing equipment, the acquired numerical values when the angles are minimum and maximum are observed and stored in real time through acquisition software on the touch panel, whether the numerical value change is linear or not in the process of observing the angles from minimum to maximum is observed, and the minimum and maximum acquisition values and the linearity are ensured to meet the sensor assembly requirement.
The handheld angular displacement sensor angular position calibration device provided by the invention can be widely used for on-site calibration of the angular displacement sensor, fills the blank that no portable equipment exists at present, and improves the efficiency of the installation test of the angular displacement sensor on an assembly site and a test bed.
The present invention is not limited to the preferred embodiments, and the present invention is described above in any way, but is not limited to the preferred embodiments, and any person skilled in the art will appreciate that the present invention is not limited to the embodiments described above, while the foregoing disclosure is directed to embodiments of the present invention, other and further embodiments of the invention may be devised without departing from the basic scope thereof, and the scope thereof is determined by the claims that follow.
Claims (7)
1. The angle position calibration device of the handheld angle displacement sensor is characterized by comprising a CPU core circuit (1), a power supply circuit (2), a 3-way excitation/feedback circuit (3), an A/D conversion circuit (4) and a touch panel (5), wherein the 3-way excitation/feedback circuit (3) comprises a 3-way angle displacement excitation circuit and a 3-way feedback processing circuit, the CPU core circuit (1) is respectively connected with a crystal oscillator, a power-on reset circuit, an RS422 communication circuit, a watchdog circuit, the 3-way angle displacement excitation circuit, the A/D conversion circuit (4) and the touch panel (5), the A/D conversion circuit (4) is also connected with the 3-way feedback processing circuit, and the power supply circuit (2) is used for supplying power to the CPU core circuit (1), the 3-way excitation/feedback circuit (3) and the A/D conversion circuit (4);
each angular displacement excitation circuit comprises a CPU chip D1, an analog switch D2, a first operational amplifier chip N1, a first triode N2, a second triode N3, a first capacitor C1, a second capacitor C2, a third capacitor C3, a first resistor R1, a second resistor R2, a third resistor R3 and a fourth resistor R4, wherein the CPU chip D1 is connected with the analog switch D2, the analog switch D2 is respectively connected with the first capacitor C1, the second capacitor C2, the third capacitor C3, the first resistor R1 and the second resistor R2, the analog switch D2 is also connected with the positive input end of the first operational amplifier chip N1, the negative input end of the first operational amplifier chip N1 is connected with the output end of the first operational amplifier chip N1, the output end of the first operational amplifier chip N1 is connected with the third resistor R3, the third resistor R3 is respectively connected with the fourth resistor R4, the base electrode N3 of the first triode N2, and the third triode N3 of the base electrode of the second triode N is connected with the triode N3;
Each feedback processing circuit comprises a second operational amplifier chip N4, a third operational amplifier chip N5, a fourth operational amplifier chip N6, a fifth operational amplifier chip N7, a fifth resistor R5, a sixth resistor R6, a seventh resistor R7, an eighth resistor R8, a ninth resistor R9, a tenth resistor R10, an eleventh resistor R11, a twelfth resistor R12, a thirteenth resistor R13, a fourth capacitor C4, a fifth capacitor C5, a sixth capacitor C6, a first diode VD1 and a second diode VD2, wherein the positive input end of the second operational amplifier chip N4 is connected with the fifth resistor R5, the negative input end of the second operational amplifier chip N4 is connected with the seventh resistor R7, the output end of the second operational amplifier chip N4 is connected with the input end of the third operational amplifier chip N5, the negative input end of the third operational amplifier chip N5 is respectively connected with the negative electrodes of the sixth resistor R6 and the first diode VD1, the output end of the third operational amplifier chip N5 is respectively connected with the positive electrode of the first diode VD1 and the negative electrode of the second diode VD2, the positive electrode of the second diode VD2 is respectively connected with a sixth resistor R6 and an eighth resistor R8, the seventh resistor R7 is connected with a ninth resistor R9, the eighth resistor R8 is connected to the negative input end of the fourth operational amplifier chip N6, the positive input end of the fourth operational amplifier chip N6 is grounded, the output end of the fourth operational amplifier chip N6 is respectively connected with a ninth resistor R9 and a tenth resistor R10, the tenth resistor R10 is respectively connected with an eleventh resistor R11 and a fourth capacitor C4, the eleventh resistor R11 is respectively connected with a twelfth resistor R12 and a sixth capacitor C6, the twelfth resistor R12 is respectively connected with a thirteenth resistor R13 and a fifth capacitor C5, the sixth capacitor C6 is connected to the negative input end of the fifth operational amplifier chip N7, the positive input end of the fifth operational amplifier chip N7 is connected with the thirteenth resistor R13.
2. The device for calibrating the angular position of a hand-held angular displacement sensor according to claim 1, wherein the 3-path angular displacement excitation circuit is configured to output an excitation signal to the angular displacement sensor, and the angular displacement sensor is started to operate; the 3-path feedback processing circuit is used for receiving the feedback signal output by the angular displacement sensor and processing the feedback signal into a direct current signal which can be acquired by the A/D conversion circuit; the A/D conversion circuit is responsible for converting the processed direct current signals into digital signals and providing the digital signals for the CPU core circuit (1) for acquisition through a data parallel bus; the CPU core circuit (1) transmits the acquired data to the touch panel (5) through a USB interface for display and storage.
3. The hand-held angular displacement sensor angular position calibration apparatus of claim 2, wherein the 3-way angular displacement excitation circuit comprises an α1 angular displacement excitation circuit, an α2 angular displacement excitation circuit, and a D8 angular displacement excitation circuit, the 3-way feedback processing circuit comprises an α1 feedback processing circuit, an α2 feedback processing circuit, and a D8 feedback processing circuit, wherein the angular displacement sensor comprises an α1 sensor, an α2 sensor, and a D8 sensor, the α1 sensor is an engine fan inlet guide vane sensor, the α2 sensor is a compressor inlet guide vane sensor, and the D8 sensor is a nozzle area sensor.
4. The device for calibrating the angular position of the handheld angular displacement sensor according to claim 1, wherein the CPU core circuit (1) adopts an LPC2468 microcontroller based on ARM7TDMI-S kernel design.
5. The device for calibrating the angular position of a hand-held angular displacement sensor according to claim 1, wherein the power circuit (2) comprises a 5V to 3.3V power chip, a 5V to 15V power chip and a 5V to 15V power chip, wherein the 5V to 3.3V power chip is used for powering the crystal oscillator, the CPU core circuit (1), the RS422 communication circuit and the watchdog circuit.
6. The device for calibrating the angular position of a hand-held angular displacement sensor according to claim 1, wherein the a/D conversion circuit (4) comprises an RC filter circuit, a multi-way switch, an op-amp chip and an a/D conversion chip.
7. The device for calibrating the angular position of a hand-held angular displacement sensor according to claim 1, wherein the touch panel (5) is an explosion-proof type solid panel.
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