CN109458263B

CN109458263B - Electronic controller and unmanned aerial vehicle

Info

Publication number: CN109458263B
Application number: CN201811506242.2A
Authority: CN
Inventors: 欧阳鹏; 张明; 薛晓波; 谷新宇; 苏庆怀; 陈方; 舒伟华; 叶子嘉
Original assignee: AECC South Industry Co Ltd
Current assignee: AECC South Industry Co Ltd
Priority date: 2018-12-10
Filing date: 2018-12-10
Publication date: 2021-02-09
Anticipated expiration: 2038-12-10
Also published as: CN109458263A

Abstract

The invention discloses an electronic controller, which is used for realizing electronic control on a turboprop engine and comprises a power board assembly, a CPU board assembly and an IO board assembly; the power board assembly is used for converting an input power supply; the IO board assembly is respectively connected with a sensor and an actuating mechanism of the engine, and is used for conditioning a signal input by the sensor into a signal which can be collected by the CPU board assembly and driving the actuating mechanism of the engine based on a control signal output by the CPU board assembly; the CPU board assembly is used for carrying out signal acquisition, signal analysis and processing and signal control; the power board assembly is connected with the CPU board assembly and the IO board assembly respectively, and the IO board assembly is connected with the CPU board assembly. The electronic controller of the invention changes the hydraulic mechanical control system into digital electronic control, can reduce and reduce the size and weight of the control system, improve the control precision of the engine, ensure that the engine has good steady-state and transient performance, and ensure that the engine can work stably and reliably.

Description

Electronic controller and unmanned aerial vehicle

Technical Field

The invention relates to the technical field of control of turboprop engines, in particular to an electronic controller. In addition, the invention also relates to an unmanned aerial vehicle comprising the electronic controller.

Background

A certain type of turboprop engine is widely applied to unmanned aerial vehicles, and the engine adopts a hydraulic mechanical control system at present and mainly comprises an engine fuel regulator FMU and a propeller pitch regulator PCU. The hydraulic mechanical control system generally has the problems of large size and weight, extensive and simple control mode, low control precision, large workload of a driver, poor maintainability and the like. Therefore, it is necessary to develop a digital electronic controller (hereinafter referred to as an electronic controller).

Disclosure of Invention

The invention provides an electronic controller and an unmanned aerial vehicle, and aims to solve the technical problem that an existing engine is low in control precision due to the fact that a hydraulic mechanical control system is adopted.

According to one aspect of the present invention, there is provided an electronic controller for electronically controlling a turboprop engine,

the power supply board assembly comprises a power supply board assembly, a CPU board assembly and an IO board assembly;

the power board assembly is used for converting an input power supply;

the IO board assembly is respectively connected with a sensor and an actuating mechanism of the engine, and is used for conditioning a signal input by the sensor into a signal which can be collected by the CPU board assembly and driving the actuating mechanism of the engine based on a control signal output by the CPU board assembly;

the CPU board assembly is used for carrying out signal acquisition, signal analysis and processing and signal control;

the power board assembly is connected with the CPU board assembly and the IO board assembly respectively, and the IO board assembly is connected with the CPU board assembly.

Furthermore, a rotating speed signal conditioning circuit is integrally arranged on the IO board assembly and is used for conditioning sinusoidal signals input by the Ng rotating speed sensor and/or the Ns rotating speed sensor into signals capable of being collected by the CPU board assembly.

Furthermore, the rotating speed signal conditioning circuit comprises a voltage division module, an amplitude limiting module, a filtering module, a signal conversion module and an optical coupling isolation module which are sequentially connected;

the voltage division module is used for dividing voltage signals input by the Ng rotating speed sensor and/or the Ns rotating speed sensor;

the amplitude limiting module is used for flattening the amplitude of the sine wave signal input by the Ng sensor and/or the Ns sensor according to a set amplitude range;

the filtering module is used for filtering signals input by the Ng sensor and/or the Ns sensor;

the signal conversion module is used for converting sine wave signals input by the Ng sensor and/or the Ns sensor into square wave signals;

the optical coupling isolation module is used for isolating input signals and output signals.

Furthermore, the IO board assembly is also integrated with a thermal resistance temperature signal conditioning circuit for conditioning the signal input by the lubricating oil temperature sensor into a signal which can be collected by the CPU board assembly.

Furthermore, the thermal resistance temperature signal conditioning circuit comprises an excitation signal circuit and a signal amplifying circuit which are connected;

the excitation signal circuit is used for providing an excitation signal for the lubricating oil temperature sensor;

the signal amplifying circuit is used for amplifying the signal output by the excitation signal circuit and transmitting the signal to the CPU board assembly.

Furthermore, a thermocouple temperature signal conditioning circuit is further integrated on the IO board assembly and used for conditioning signals input by the thermocouple into signals capable of being collected by the CPU board assembly.

Furthermore, a singlechip and an RS422 serial port extension circuit which are connected are integrated on the CPU board component, and the singlechip is only provided with an RS232 communication interface;

the RS422 serial port expansion circuit is used for expanding the communication interface of the singlechip and converting the RS232 communication interface into an RS422 communication interface.

Furthermore, the RS422 serial port extension circuit comprises a two-way universal asynchronous transceiver circuit and an RS422 conversion chip;

the two-way universal asynchronous transceiver circuit is used for expanding two RS232 serial interfaces;

the RS422 conversion chip is used for respectively converting one path of RS232 communication interface carried by the singlechip microcomputer and two paths of RS232 serial interfaces expanded by the two paths of universal asynchronous transceiver circuits into RS422 serial interfaces.

Further, the two-way universal asynchronous transceiver circuit comprises a universal asynchronous transceiver U24, an OR gate U25, a capacitor C91, a capacitor C92, a capacitor C93 and a crystal oscillator G1, wherein the model of the universal asynchronous transceiver U24 is TL16C2552FN, and the model of the OR gate U25 is CD74HC 4075M;

pin 13 of the universal asynchronous receiver/transmitter U24 is connected with the second end of the capacitor C92, the first end of the capacitor C92 is grounded, the first end of the capacitor C91 is grounded, the second end of the capacitor C91 is connected with pin 11 of the universal asynchronous receiver/transmitter U24, the first end of the crystal oscillator G1 is connected with the second end of the capacitor C91, and the first end of the crystal oscillator G1 is connected with the second end of the capacitor C92;

the No. 33 pin, the No. 42 pin, the No. 43 pin and the No. 41 pin of the universal asynchronous receiver/transmitter U24 are connected with a power panel assembly (11), the first end of a capacitor C93 is grounded, and the second end of a capacitor C93 is connected with the No. 33 pin of the universal asynchronous receiver/transmitter U24;

pins 2-16 of the universal asynchronous transceiver U24 are connected with the single chip microcomputer, a pin 34 of the universal asynchronous transceiver U24 is connected with a pin 8 of the OR gate U25, a pin 17 of the universal asynchronous transceiver U24 is connected with a pin 2 of the OR gate U25, a pin 1 of the OR gate U25 is grounded, a pin 9 of the OR gate U25 is connected with the single chip microcomputer, and a pin 17 and a pin 34 of the universal asynchronous transceiver U24 are connected with the single chip microcomputer;

no. 38 pin and No. 39 pin of the universal asynchronous transceiver U24 are used as output pin positions of one path of RS232 communication interface, No. 25 pin and No. 26 pin are used as output pin positions of the other path of RS232 communication interface, the No. 38 pin, the No. 39 pin, the No. 25 pin and the No. 26 pin of the universal asynchronous transceiver U24 are all connected with the RS422 conversion chip, and the RS232 communication interface on the single chip microcomputer is connected with the RS422 conversion chip.

The invention also provides an unmanned aerial vehicle which comprises the electronic controller.

The invention has the following beneficial effects:

the electronic controller of the invention changes the hydraulic mechanical control system into digital electronic control, can reduce and reduce the size and weight of the control system, improve the control precision of the engine, reduce the working load of a driver, effectively avoid the engine fault caused by artificial misoperation, realize comprehensive automatic control of the starting, steady state, acceleration and deceleration and stopping processes of the engine, ensure that the engine has good steady state and transient state performance, and ensure that the engine can stably and reliably work.

The unmanned aerial vehicle disclosed by the invention also has the advantages.

In addition to the objects, features and advantages described above, other objects, features and advantages of the present invention are also provided. The present invention will be described in further detail below with reference to the drawings.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the invention and, together with the description, serve to explain the invention and not to limit the invention. In the drawings:

fig. 1 is a mechanical structure diagram of an electronic controller according to a preferred embodiment of the present invention.

FIG. 2 is a schematic diagram of a speed conditioning circuit of the electronic controller in accordance with a preferred embodiment of the present invention.

FIG. 3 is a schematic diagram of the activation signal circuit of the electronic controller of the preferred embodiment of the present invention.

Fig. 4 is a schematic diagram of a signal amplification circuit of the electronic controller of the preferred embodiment of the present invention.

FIG. 5 is a schematic diagram of a thermocouple temperature signal conditioning circuit of the electronic controller of the preferred embodiment of the present invention.

FIG. 6 is a schematic diagram of a first pressure signal conditioning circuit of the electronic controller of the preferred embodiment of the present invention.

FIG. 7 is a schematic diagram of a second pressure signal conditioning circuit of the electronic controller of the preferred embodiment of the present invention.

Fig. 8 is a schematic diagram of the internal temperature acquisition circuitry of the electronic controller of the preferred embodiment of the present invention.

Fig. 9 is a schematic diagram of the internal atmospheric pressure acquisition circuitry of the electronic controller of the preferred embodiment of the present invention.

Fig. 10 is a schematic diagram of a relay output circuit of the electronic controller of the preferred embodiment of the present invention.

Fig. 11 is a schematic diagram of a switching value input detection circuit of the electronic controller in accordance with the preferred embodiment of the present invention.

Fig. 12 is a schematic diagram of a reference voltage output circuit of the electronic controller of the preferred embodiment of the present invention.

Fig. 13 is a schematic diagram of a stepper motor drive circuit of an electronic controller in accordance with a preferred embodiment of the present invention.

Fig. 14 is a schematic diagram of a hardware reset circuit of the electronic controller in accordance with a preferred embodiment of the present invention.

FIG. 15 is a schematic diagram of the A/D conversion circuit of the electronic controller of the preferred embodiment of the present invention.

Fig. 16 is a schematic diagram of the RC bridge oscillator circuit and the push-pull output circuit of the electronic controller of the preferred embodiment of the present invention.

Fig. 17 is a schematic diagram of a rotary digital converter of an electronic controller and its peripheral circuits in accordance with a preferred embodiment of the present invention.

Fig. 18 is a schematic diagram of an LVDT switching circuit of the electronic controller in accordance with a preferred embodiment of the present invention.

Fig. 19 is a schematic diagram of the RS422 serial port extension circuit of the electronic controller of the preferred embodiment of the present invention.

Illustration of the drawings:

11. a power board assembly; 12. a CPU board assembly; 13. an IO board assembly; 14. a base; 15. a housing; 16. a support pillar; 17. an electrical connector; 131. a voltage division module; 132. an amplitude limiting module; 133. a filtering module; 134. a signal conversion module; 135. optical coupling isolation module.

Detailed Description

The embodiments of the invention will be described in detail below with reference to the accompanying drawings, but the invention can be embodied in many different forms, which are defined and covered by the following description.

As shown in fig. 1, a preferred embodiment of the present invention provides an electronic controller, which is configured to collect external signals, such as analog quantity signals, frequency quantity signals, discrete quantity signals, and communication signals, transmitted by an aircraft and an engine, control the rotational speed of a gas turbine of the engine by adjusting the flow rate of fuel oil, control the rotational speed of a propeller by adjusting the variable-pitch oil pressure, implement comprehensive automatic control of the starting, steady-state, acceleration and deceleration, and stopping processes of the engine, and comprehensively limit and protect important parameters, thereby ensuring that the engine has good steady-state and transient-state performance, and ensuring that the engine can stably and reliably operate.

The electronic controller comprises a power board assembly 11, a CPU board assembly 12 and an IO board assembly 13, wherein the power board assembly 11 is used for converting an input power supply, so that a proper working power supply is provided for the CPU board assembly 12, the IO board assembly 13 and corresponding sensors and actuating mechanisms, and meanwhile, the power board assembly 11 also has the functions of reverse connection protection, short circuit prevention, current limiting protection and the like. For example, the power board assembly 11 provides 28V operating voltage to the relay, 24V operating voltage to the torque pressure sensor and the oil pressure sensor, 15V operating voltage to the stepping motor, 12V operating voltage to the amplifier circuit, 5V operating voltage to the digital circuit, and 9V operating voltage to the rotational speed signal conditioning circuit.

The CPU board assembly 12 is a core part of the electronic controller, and is used for signal acquisition, signal processing, and signal control, and specifically includes sampling analog signals such as temperature and pressure, performing a/D conversion at different times for voltage sampling, counting speed signals, reading data of each expansion port through a data bus, processing received signals and outputting corresponding control signals, and adjusting currents of a stepping motor and an electro-hydraulic servo valve, thereby maintaining and adjusting the engine speed and the propeller speed. The CPU board assembly 12 is also used to check the operating status of the engine and the electronic controller circuit, output a corresponding fault signal when a certain fault occurs in the engine or the electronic controller circuit, and control the engine to stop. The CPU board assembly 12 is integrated with a single chip microcomputer and an expansion circuit thereof, and the expansion circuit includes an LVDT (Linear Variable Differential Transformer) conversion circuit, an RVDT (Rotary Variable Differential Transformer) conversion circuit, an a/D conversion circuit, and an RS422 serial expansion circuit.

The IO board assembly 13 is mainly used for conditioning a signal input by a sensor into a signal which can be collected by the CPU board assembly 12 and transmitting the signal to the CPU board assembly 12, and is also used for driving an execution mechanism with a control signal output by the CPU board assembly 12 through a driving circuit, and collecting the total atmospheric pressure and the ambient temperature of the environment where the electronic controller is located. The IO board assembly 13 is integrated with various signal conditioning circuits, an internal temperature acquisition circuit, an internal atmospheric pressure acquisition circuit, a relay output circuit, a switching value input detection circuit, a reference voltage output circuit, a switching value relay output circuit, and a stepping motor drive circuit. It CAN be understood that, as an optimization, a CAN communication interface circuit is further integrated on the power panel assembly 11, so that the single chip microcomputer CAN communicate with the engine and/or the external control device through a CAN bus.

In addition, electronic controller still includes base 14, dustcoat 15 and support column 16, electronic controller overall assembly structure is frame box-type structure, and base 14 is whole electronic controller's assembly basis, IO board subassembly 13 is connected with power strip subassembly 11 and CPU board subassembly 12 through support column 16, power strip subassembly 11 passes through support column 16 and connects on base 14, dustcoat 15 and the detachable connection of base 14 in order to protect inner structure parcel. The base 14 is provided with an electric connector 17 and a transfer cable (not shown) connected with each other, the electric connector 17 is butted with a connector socket on the engine, and the transfer cable is connected with the power panel assembly 11, the CPU board assembly 12 and the IO board assembly 13.

As shown in fig. 2, a speed signal conditioning circuit is integrated on the IO board assembly 13, and is configured to condition sinusoidal signals input by an Ng speed sensor and/or an Ns speed sensor into signals that can be collected by the CPU board assembly 12, where the Ng speed sensor is used to detect the engine turbine speed, and the Ns speed sensor is used to detect the propeller speed. The rotating speed signal conditioning circuit comprises a voltage division module 131, an amplitude limiting module 132, a filtering module 133, a signal conversion module 134 and an optical coupling isolation module 135 which are connected in sequence, the voltage dividing module 131 is used for dividing the voltage signal input by the Ng speed sensor or the Ns speed sensor, the voltage dividing module 131 comprises a resistor R1, a resistor R2, a resistor R3, a resistor R4 and a capacitor C1, a first end of the resistor R1 is connected with a positive electrode input end of the Ng sensor or the Ns sensor, a first end of the resistor R1 is further connected with a first end of the resistor R3, a second end of the resistor R1 is connected with a first end of a resistor R2, a second end of the resistor R1 is connected with a negative electrode input end of the Ng sensor or the Ns sensor, a second end of the resistor R2 is grounded, a second end of the resistor R3 is connected with a first end of the resistor R4, a second end of the resistor R4 is connected with a second end of the resistor R1, and two ends of the capacitor C1 are respectively connected with two ends of the resistor R4. The type of resistance R1, resistance R3 is 100K, the type of resistance R2 is 0R, and the setting of resistance R2 can restrict loop current effectively, plays the effect of suppressing circuit noise, the type of resistance R4 is 4.7K, and the type of electric capacity C1 is 0.01 mu F/100V.

The amplitude limiting module 132 is configured to flatten the amplitude of the sine wave signal input by the Ng sensor or the Ns sensor according to a set amplitude range, the amplitude limiting module 132 is a bidirectional diode D1, a first end of the bidirectional diode D1 is connected to a second end of the resistor R3, and a second end of the bidirectional diode D1 is connected to a second end of the resistor R1. The bidirectional diode D1 is of the type MMBD4148 SE.

The filtering module 133 is configured to filter a signal input by the Ng sensor and/or the Ns sensor, where the filtering module 133 includes a resistor R5, a resistor R6, a capacitor C2, a capacitor C3, and a capacitor C4, a first end of the resistor R5 is connected to a second end of the bidirectional diode D1, a second end of the resistor R5 is connected to a second end of the capacitor C2 and the signal conversion module 134, a second end of the capacitor C2 is connected to the signal conversion module 134, a first end of the capacitor C2 is connected to a first end of the bidirectional diode D1, a first end of the resistor R6 is connected to a second end of the resistor R5, a second end of the resistor R6 is grounded, a first end of the capacitor C3 is connected to a second end of the resistor R6, a second end of the capacitor C3 is grounded, a first end of the capacitor C4 is connected to a first end of the capacitor C3, and a second end of the capacitor C4 is connected to the signal conversion module. The type of the resistor R5 is 150K, the type of the resistor R6 is 1.2K, the type of the capacitor C2 is 1000pF/100V, the type of the capacitor C3 is 0.1 muF/25V, and the type of the capacitor C4 is 0.1 muF/25V. The filtering module 133 of the present invention has an inventive circuit design, and can achieve a better filtering effect. It is understood that the capacitor C3 and the capacitor C5 may be omitted.

The signal conversion module 134 is configured to convert a sine wave signal input by the Ng sensor and/or the Ns sensor into a square wave signal, the signal conversion module 134 includes a comparator U1, a resistor R7, a resistor R8, a resistor R9, a resistor R10, a resistor R11, a transistor Q1, and a capacitor C5, the model of the comparator U1 is LM211D, a pin No. 5 of the comparator U1 is connected to a second end of the capacitor C4, a pin No. 3 is connected to a second end of the resistor R3, a pin No. 2 is connected to a second end of the resistor R5, a pin No. 6 is connected to a second end of the capacitor C4, a pin No. 4 is connected to a second end of the capacitor C3, a pin No. 1 is grounded, a pin No. 8 is connected to the power board assembly 11, one end of the capacitor C5 is connected to a pin No. 8, the other end is grounded, a pin No. 7 is connected to a first end of the resistor R10 and a first end of the resistor R9, a second end of, the second end of the resistor R10 is connected to the first end of the resistor R11 and the base of the transistor Q1, the second end of the resistor R11 is connected to the power board assembly 11 and the emitter of the transistor Q1, and the collector of the transistor Q1 is connected to the optocoupler isolation module 135. The first end of the resistor R7 is connected with the power panel component 11, the second end of the resistor R7 is connected with the No. 2 pin, the first end of the resistor R8 is connected with the second end of the resistor R7, and the second end of the resistor R8 is connected with the first end of the resistor R9. The type of the resistor R7 is 470K, the type of the resistor R8 is 240K, the type of the resistor R9 is 1.2K, the type of the resistor R10 is 10K, the type of the resistor R11 is 3.3K, the type of the triode Q1 is 2N2907A, and the type of the capacitor C5 is 0.1 mu F/25V. The signal conversion module 134 controls the triode Q1 to be in saturation conduction or cutoff by using the comparator U1, and further controls the optocoupler isolation module 135 to be in conduction or cutoff, and the circuit is simple in structure, low in manufacturing cost and high in control precision.

The optical coupling isolation module 135 is used for isolating input signals and output signals, the optical coupling isolation module 135 comprises an optoelectronic coupling chip U2, a resistor R12 and a resistor R13, the model of the optoelectronic coupling chip U2 is HCPL0600, a pin No. 2 of the optoelectronic coupling chip U2 is connected with a collector electrode of a triode Q1 through a resistor R12, a pin No. 8 and a pin No. 7 are pulled up to +5V power through a resistor R13, so that the input signals are integrated to form TTL pulse signals and are output to the CPU board assembly 12 through a pin No. 6, namely the pin No. 8 and the pin No. 7 are connected with a first end of the resistor R13, and a second end of the resistor R13 is connected with the power board assembly 11. The resistor R12 is 680R. The optical coupling isolation module 135 of the present invention shapes the signal input by the Ng speed sensor or the Ns speed sensor into a TTL pulse signal by pulling up the optical coupling output signal to the +5V power supply through the resistor R13, so as to facilitate the collection by the CPU board assembly 12, and simultaneously, also realize the isolation between the output signal and the input signal. It is understood that all the grounds in the tachometer signal conditioning circuit are digital grounds.

The IO board assembly 13 is further integrated with a thermal resistance temperature signal conditioning circuit, and is used for conditioning a signal input by a lubricating oil temperature sensor into a signal which can be acquired by the CPU board assembly 12, wherein the lubricating oil temperature sensor is PT 100. The thermal resistance temperature signal conditioning circuit comprises an excitation signal circuit and a signal amplification circuit which are connected, wherein the excitation signal circuit is used for providing an excitation signal for the lubricating oil temperature sensor, and the signal amplification circuit is used for amplifying a signal output by the excitation signal circuit. As shown in FIG. 3, the excitation signal circuit comprises a resistor R14, a resistor R15, a resistor R16, a resistor R17, a resistor R18, a capacitor C6, a capacitor C7, an operational amplifier U3 and a transistor Q2, the operational amplifier U3 is OPA277UA, the first end of the resistor R14 is grounded, the second end of the resistor R14 is connected to the first end of the resistor R15 and the inverting input end of the operational amplifier U3, the inverting input end is a pin No. 2, the second end of the resistor R14 is further connected to the first end of the resistor R15, the second end of the resistor R15 is connected to the emitter of the triode Q2, the first end of the resistor R16 is connected to the power board assembly 11, the second end of the resistor R16 is connected to the non-inverting input end of the operational amplifier U3, the non-inverting input end is a pin No. 3, the pin No. 7 of the operational amplifier U3 is connected to the power board assembly 11, the first end of the capacitor C6 is connected to the pin No. 7 of the operational amplifier U3, and the second end of the capacitor. The No. 4 pin of the operational amplifier U3 is connected with the power panel assembly 11, the first end of the capacitor C7 is connected with the No. 4 pin of the operational amplifier U3, and the second end of the capacitor C7 is grounded. It is understood that the power board assembly 11 provides an operating voltage of + -12V to the operational amplifier U3 through

pins

7 and 4. A first end of the resistor R17 is connected to the non-inverting input terminal of the operational amplifier U3, and a second end of the resistor R17 is connected to the signal amplification circuit. The output end of the operational amplifier U3 is connected with the first end of the resistor R19, the second end of the resistor R19 is connected with the base electrode of the triode Q2, the collector electrode of the triode Q2 is connected with the power panel component 11, the emitter electrode of the triode Q2 is connected with the first end of the resistor R18, the second end of the resistor R18 is connected with the second ends of the lubricating oil temperature sensor and the resistor R17, and the lubricating oil temperature sensor is grounded. The type of the resistor R14, the type of the resistor R15, the type of the resistor R16 and the type of the resistor R17 are 100K, the type of the resistor R18 is 5.1K, the type of the triode Q2 is 2N2222A, and the types of the capacitor C6 and the capacitor C7 are 0.1 mu F/25V. The excitation signal circuit of the invention adopts the operational amplifier U3 and the triode Q2 to form the constant current source, thereby providing stable excitation signals for the lubricating oil temperature sensor, and the circuit structure is very simple, and the cost of the used components is lower. It is understood that the capacitor C6 and the capacitor C7 may be omitted.

As shown in fig. 4, the signal amplifying circuit includes a resistor R20, a resistor R21, a resistor R22, a resistor R23, a resistor R24, a resistor R25, a capacitor C8, a capacitor C9, a capacitor C10, a capacitor C11, a capacitor C12, a bidirectional diode D2 and an amplifier U4, the amplifier U4 is of a model 1NA114AU, a first end of the resistor R20 is connected to a second end of the resistor R17, a second end of the resistor R20 is connected to a pin No. 4 of the amplifier U4, that is, to an inverting input terminal of the amplifier U4, a first end of the capacitor C8 is connected to a second end of the resistor R20, and a second end of the capacitor C8 is grounded. The first end of the diode C9 is connected with the second end of the resistor R21, the second end of the diode C9 is grounded, the first end of the resistor R21 is connected with the first end of the resistor R22, the second end of the resistor R22 is connected with the second end of the capacitor C9, and the second end of the resistor R21 is connected with the non-inverting input end of the amplifier U4, namely, the non-inverting input end of the amplifier U4 is connected with the No. 5 pin. The bidirectional diode D2 has one end connected to the second terminal of the resistor R20 and the other end connected to the second terminal of the resistor R21. The first end of the resistor R23 is connected with the No. 5 pin of the amplifier U4, the second end of the resistor R23 is grounded, the first end of the resistor R24 is connected with the No. 4 pin of the amplifier U4, and the second end of the resistor R24 is grounded. The pin 10 of the amplifier U4 is connected to ground, and the pin 13 is connected to the power strip assembly 11. The first end of the capacitor C10 is connected with the No. 13 pin of the amplifier U4, and the second end of the capacitor C10 is grounded. The pin 7 of the amplifier U4 is connected to the first terminal of the capacitor C11, the first terminal of the capacitor C11 is connected to the power strip assembly 11, and the second terminal of the capacitor C11 is grounded. The first end of the capacitor C12 is connected with the output end of the amplifier U4, namely, connected with the No. 11 pin, and the second end of the capacitor C12 is grounded. The No. 15 pin of the amplifier U4 is connected with the No. 2 pin through a resistor R25, the No. 11 pin is connected with the No. 12 pin, and the output end of the amplifier U4 is connected with the CPU board assembly 12. The type of the resistor R20 and the type of the resistor R21 are 470R, the type of the resistor R22 is 0R, the type of the resistor R23 and the type of the resistor R24 are 100K, the type of the resistor R25 is 1K/0.1%, the type of the bidirectional diode D2 is MMBD4148SE, the types of the capacitor C8, the capacitor C9 and the capacitor C12 are 0.47 mu F/25V, and the types of the capacitor C10 and the capacitor C11 are 0.1 mu F/25V. It is understood that the capacitor C10 and the capacitor C11 may be omitted.

It is understood that the grounds referred to in the thermal resistance temperature signal conditioning circuit are all analog grounds. The power board assembly 11 inputs +5V voltage through a resistor R16, and the constant current source current I output by the excitation signal circuit_Tffs+5V/R18 ≈ 0.98 mA. The lubricating oil temperature sensor adopts a platinum resistor PT100, and the relation between the resistance value of the platinum resistor PT100 and the ambient temperature is R_pt100Considering the collection temperature range of the oil temperature sensor (-40 ℃ to +160 ℃), the resistance value variation range of the platinum resistor PT100 is (84.6 Ω to 161.6 Ω) obtained by the above formula, the voltage signal range input to the operational amplifier U4 is (0.083V to 0.1584V), and the amplification factor a of the signal amplification circuit is 1+50K/R25 is 51, so that the voltage range output by the signal amplification circuit is (4.233V to 8.0784V) after amplification processing, and the voltage range is convenient for being collected by the CPU board assembly 12.

As shown in fig. 5, a thermocouple temperature signal conditioning circuit is further integrated on the IO board assembly 13, and is configured to condition a signal input by a thermocouple into a signal that can be collected by the CPU board assembly 12, where the thermocouple is a T45 type thermocouple, and the thermocouple is configured to detect an exhaust temperature of a gas turbine, which is hereinafter referred to as T45. The thermocouple temperature signal conditioning circuit comprises a resistor R26, a resistor R27, a resistor R28, a resistor R29, a resistor R30, a resistor R31, a capacitor C13, a capacitor C14, a capacitor C15, a capacitor C16, a capacitor C17, a capacitor C18 and an amplifier U5, wherein the model of the amplifier U5 is 1NA114AU, the first end of the resistor R26 is connected with the T45, and the second end of the resistor R26 is connected with the non-inverting input end of the amplifier U5, namely connected with the No. 5 pin of the amplifier U5. The capacitor C3 has a first terminal connected to ground and a second terminal connected to the second terminal of the resistor R26. The first end of the resistor R28 is connected with the first ends of the T45 and the resistor R27, the second end of the resistor R28 is connected with the first end of the resistor R29 and the second end of the resistor R30, the second end of the resistor R29 is grounded, and the first end of the resistor R30 is connected with the power panel assembly 11. The second terminal of the resistor R27 is connected to the inverting input of the amplifier U5, i.e., to pin 4 thereof. The first end of the capacitor C14 is connected to the second end of the resistor R27, and the second end of the capacitor C14 is grounded. A first terminal of the capacitor C15 is connected to the second terminal of the resistor R26, and a second terminal of the capacitor C15 is connected to the second terminal of the capacitor R27. No. 15 pin of the amplifier U5 is connected with No. 2 pin through the resistor R31, the No. 10 pin is grounded, the No. 13 pin is connected with the first end of the capacitor C16, the second end of the capacitor C16 is grounded, and the first end of the capacitor C16 is also connected with the power board assembly 11. Pin No. 7 of the amplifier U5 is connected to the first terminal of the capacitor C17, the second terminal of the capacitor C17 is connected to ground, and the first terminal of the capacitor C17 is also connected to the power board assembly 11. The output end of the amplifier U5 is connected with the No. 12 pin, namely the No. 11 pin is connected with the No. 12 pin, the first end of the capacitor C18 is connected with the output end of the amplifier U5, the second end of the capacitor C18 is grounded, and the output end of the amplifier U5 is connected with the CPU board assembly 12. The type of the resistor R26 and the type of the resistor R27 are 5.11K/0.1%, the type of the resistor R28 is 1M/0.5W, the type of the resistor R29 is 4.02K/0.1%, the type of the resistor R30 is 13.3K/0.1%, the type of the resistor R31 is 511R/0.1%, the types of the capacitor C13 and the capacitor C14 are 0.068 muF/16V, the type of the capacitor C15 is 0.33 muF/16V, the types of the capacitor C16 and the capacitor C17 are 0.1 muF/25V, and the type of the capacitor C18 is 0.47 muF/25V. It is understood that the capacitor C16 and the capacitor C17 may be omitted.

It is understood that the ground referred to in the thermocouple temperature signal conditioning circuit is an analog ground. The thermocouple signal input by T45 is sent to the input end of the precision instrument amplifier after RC filtering, the noise interference signal of T45 is filtered, and the circuit cut-off frequency f is set₀1/2 pi R26C 13 458Hz, the amplification factor a of the amplifier U5 1+50K/R31 98.8474, and the actual temperature range measured by T45 is (-50 ℃ to 1200 ℃) measured by checking a thermocouple graduation table pairThe thermoelectric voltage range (-1.889 mV-48.828 mV), which cannot be picked up by the CPU board assembly 12. The voltage range after being amplified by the amplifier U5 is (0.1867V-4.8265V), so that the voltage can be collected by the CPU board assembly 12 smoothly, and the precision requirement of a collecting circuit on the CPU board assembly 12 is reduced.

Still integratively be provided with pressure signal conditioning circuit on the IO board subassembly 13, pressure signal conditioning circuit includes first pressure signal conditioning circuit and second pressure signal conditioning circuit, first pressure signal conditioning circuit is used for conditioning into the signal that CPU board subassembly 12 can gather with the signal of P3 pressure sensor input, second pressure signal conditioning circuit is used for conditioning into the signal that CPU board subassembly 12 can gather with the signal of torque pressure sensor or lubricating oil pressure sensor input, and wherein P3 pressure sensor is used for detecting the pressure of the press export of engine, and torque pressure sensor is used for detecting the moment of torsion of screw, and lubricating oil pressure sensor is used for detecting the pressure of lubricating oil.

As shown in fig. 6, the first pressure signal conditioning circuit includes a resistor R32, a resistor R33, a resistor R34, a resistor R35, a resistor R36, a capacitor C19, a capacitor C20, a capacitor C21, a capacitor C22, a capacitor C23, a capacitor C24, a capacitor C25, a capacitor C26, a capacitor C27, and an amplifier U6, where the model of the amplifier U6 is 1NA114AU, a first end of the resistor R32 is connected to the P3 pressure sensor, a second end of the resistor R32 is connected to a first end of the resistor R34, and a second end of the resistor R34 is connected to a non-inverting input terminal of the amplifier U6, that is, to the pin No. 5 thereof. The first end of the capacitor C20 and the first end of the capacitor C23 are grounded, the second end of the capacitor C20 is connected with the second end of the resistor R32, and the second end of the capacitor C23 is connected with the second end of the resistor R34. The first end of the resistor R33 is connected with the P3 pressure sensor, the second end of the resistor R33 is connected with the first end of the resistor R35, and the second end of the resistor R35 is connected with the inverting input end of the amplifier U6, namely, the No. 4 pin of the amplifier U6. The first end of the capacitor C21 and the first end of the capacitor C24 are both grounded, the second end of the capacitor C21 is connected to the second end of the resistor R33, and the second end of the capacitor C24 is connected to the second end of the resistor R35. The first end of the capacitor C19 is connected with the second end of the resistor R32, the second end of the capacitor C19 is connected with the second end of the resistor R33, the first end of the capacitor C22 is connected with the second end of the resistor R34, and the second end of the capacitor C22 is connected with the second end of the resistor R35. The No. 10 pin of the amplifier U6 is grounded, the No. 13 pin is connected with the power board component 11, the No. 15 pin is connected with the No. 2 pin through a resistor R36, the No. 7 pin is connected with the power board component 11, and the output end is connected with the No. 12 pin and the CPU board component 12. The first end of the capacitor C26 is connected with the No. 13 pin of the amplifier U6, and the second end of the capacitor C26 is grounded. A first end of the capacitor C25 is connected with a No. 7 pin of the amplifier U6, and a second end of the capacitor C25 is grounded. A first terminal of the capacitor C27 is connected to the output terminal of the amplifier U6, and a second terminal of the capacitor C27 is connected to ground. The type of the resistor R32, the type of the resistor R33, the type of the resistor R34 and the type of the resistor R35 are 10K, the type of the resistor R36 is 1K/0.1%, the type of the capacitor C19, the type of the capacitor C22 and the type of the capacitor C27 are 0.47 mu F/25V, the type of the capacitor C20, the type of the capacitor C21, the type of the capacitor C23 and the type of the capacitor C24 are 0.01 mu F/100V, and the type of the capacitor C25 and the type of the capacitor C26 are 0.1 mu F/25V. It is understood that the capacitor C25 and the capacitor C26 may be omitted.

It is understood that the ground referred to in the first pressure signal conditioning circuit is an analog ground. The signal input by the P3 pressure sensor is sent to the input end of an amplifier U6 after being filtered by two stages of RC, and noise interference signals of the P3 pressure sensor are fully filtered. The voltage range of P3 pressure sensor output is (0 ~ 26mV), and the voltage range of output is (0 ~ 1.326V) after amplifier U6 enlargies, and the CPU board subassembly 12 of being convenient for carries out signal acquisition, has reduced acquisition circuit's precision demand on the CPU board subassembly 12, and first pressure signal conditioning circuit simple structure moreover adopts and all is comparatively common electronic components in the market, and low cost has good control accuracy.

As shown in fig. 7, the second pressure signal conditioning circuit includes a resistor R37, a resistor R38, a capacitor C28, a schottky diode D3 and an amplifier U7, the schottky diode D3 is of BAS40-04W type, the amplifier U7 is of LM148J type, a first end of the resistor R37 is connected to pin 3 of the schottky diode D3, a first end of the resistor R37 is further connected to a torque pressure sensor or a lubricant pressure sensor, and a second end of the resistor R37 is connected to an inverting input terminal of the amplifier U7, that is, to pin 9 thereof. The first end of the capacitor C28 is connected to the second end of the resistor R37, and the second end of the capacitor C28 is grounded. The output terminal of the amplifier U7 is connected to the non-inverting input terminal through a resistor R38, and the output terminal of the amplifier U7 is also connected to the CPU board assembly 12. The type of the resistor R37 is 4.7K, the type of the resistor R38 is 10K, and the type of the capacitor C28 is 0.1 mu F/25V.

It is understood that the ground referred to in the second pressure signal conditioning circuit is an analog ground. The voltage signal input by the torque pressure sensor or the lubricating oil pressure sensor passes through the RC low-pass filter circuit, the noise interference signal in the torque pressure sensor or the lubricating oil pressure sensor is processed firstly, and then the noise interference signal is sent to the amplifier U7 for amplification, the voltage range output after the amplification of the amplifier U7 is (0-5V), and the collection of the CPU board assembly 12 is facilitated.

As shown in fig. 8, an internal temperature acquisition circuit is further integrated on the IO board assembly 13, and is used for acquiring the internal temperature of the electronic controller through a platinum resistor PT100 and transmitting the temperature to the CPU board assembly 12. The internal temperature acquisition circuit comprises a resistor R39, a resistor R40, a resistor R41, a platinum resistor PT100, a resistor R41, a resistor R42, a resistor R43, a resistor R44, a resistor R45, a capacitor C29, a capacitor C30, a capacitor C31, a capacitor C32 and an amplifier U8, wherein the model of the amplifier U8 is 1NA114AU, the first end of the resistor R39 and the first end of the resistor R40 are connected with the power panel assembly 11, the second end of the resistor R39 is connected with the first end of the platinum resistor PT100, the second end of the platinum resistor PT100 is grounded, the first end of the resistor R41 is connected with the second end of the resistor R40, and the second end of the resistor R41 is grounded. The second end of the resistor R39 is connected with the first end of the resistor R42, and the second end of the resistor R42 is connected with the non-inverting input end of the amplifier U8, namely, the No. 5 pin thereof. The second end of the resistor R40 is connected with the first end of the resistor R43, and the second end of the resistor R43 is connected with the inverting input terminal of the amplifier U8, namely, the No. 4 pin thereof. The first end of the capacitor C29 is connected with the second end of the resistor R34, the second end of the capacitor C29 is grounded, the first end of the capacitor C30 is connected with the second end of the resistor R43, and the second end of the resistor R30 is grounded. A first terminal of the resistor R44 is connected to the non-inverting input of the amplifier U8, and a second terminal of the resistor R44 is connected to ground. The pin No. 10 of the amplifier U8 is grounded, the pin No. 13 is connected with the first end of the capacitor C31, the first end of the capacitor C31 is also connected with the power board assembly 11, and the second end of the capacitor C31 is grounded. The pin 7 of the amplifier U8 is connected to the first terminal of the capacitor C32, the first terminal of the capacitor C32 is also connected to the power board assembly 11, and the second terminal of the capacitor C32 is grounded. The output end of the amplifier U8 is connected with the No. 12 pin, the No. 15 pin is connected with the No. 2 pin through a resistor R45, and the output end of the amplifier U8 is connected with the CPU board assembly 12. The type of the resistor R39 and the type of the resistor R40 are 10K, the type of the resistor R41 is 84.5/0.05%, the type of the platinum resistor PT100 is PT1DM-513, the type of the resistor R42 and the type of the resistor R43 are 470R, the type of the resistor R44 is 100K, the type of the resistor R45 is 1K/0.1%, the type of the capacitor C29 and the type of the capacitor C30 are 0.47 muF/25V, and the type of the capacitor C31 and the type of the capacitor C32 are 0.1 muF/25V. It is understood that the capacitor C31 and the capacitor C32 may be omitted.

It can be understood that, as preferred, the internal temperature acquisition circuit further includes an RC low-pass filter circuit, the RC low-pass filter circuit is connected with the output end of the amplifier U8, and the voltage signal output by the amplifier U8 is subjected to RC low-pass filtering and then sent to the CPU board assembly 12 for sampling, so that noise interference signals can be effectively filtered.

It is understood that all grounds referred to in the internal temperature acquisition circuit are analog grounds. The relationship between the resistance value of the platinum resistor PT100 and the ambient temperature is R_pt100Considering the actual storage temperature of the electronic controller (-55 ℃ to +85 ℃), the resistance value variation range (78.825 Ω to 132.725 Ω) of the platinum resistor PT100 can be obtained by the above formula. The difference between the voltage at two ends of the platinum resistor PT100 and the reference voltage is collected through an electric bridge, the difference voltage of the electric bridge is sent to a precision instrument amplifier U8 to be amplified, the amplification factor A is 1+50K/R45 is 51, and the output voltage U is output_pt100For sampling by the CPU board assembly 12 after passing through the RC low pass filter circuit. The resistor R39, the resistor R40, the resistor R41 and the platinum resistor PT100 form an electric bridge, so that the signal acquisition precision is improved, the circuit structure is simpler, and the cost is low.

As shown in fig. 9, an internal atmospheric pressure collecting circuit is further integrated on the IO board assembly 13, and is configured to collect a pressure value inside the electronic controller and transmit the pressure value to the CPU board assembly 12. The internal atmospheric pressure acquisition circuit comprises an atmospheric pressure sensor, an operational amplifier U9, a resistor R46, a resistor R47, a capacitor C33, a capacitor C34, a capacitor C35 and a capacitor C36, wherein the pressure sensor is a high-precision integrated silicon atmospheric pressure sensor MPXHZ6115A6U, the model of the amplifier U9 is LM148J, a No. 2 pin of the pressure sensor is connected with the power panel component 11, a No. 3 pin is grounded, a No. 4 pin is connected with the first end of the resistor R46, the first end of the capacitor C33 is connected with the No. 2 pin of the pressure sensor, and the second end of the capacitor C33 is grounded. The second terminal of the resistor R46 is connected to the inverting input of the amplifier U9, i.e., to pin No. 2 thereof. The first end of the capacitor C34 is connected to the second end of the resistor R46, and the second end of the capacitor C34 is grounded. The power board assembly 11 with the No. 11 pin of the amplifier U9 is connected, the first end of the capacitor C35 is connected with the No. 11 pin of the amplifier U9, and the second end of the capacitor C35 is grounded. The No. 4 pin of the amplifier U9 is connected with the power panel assembly 11, the first end of the capacitor C36 is connected with the No. 4 pin, and the second end of the capacitor C36 is grounded. The output terminal of the amplifier U9 is connected to the CPU board assembly 12, and the output terminal of the amplifier U9 is connected to the non-inverting input terminal through a resistor R47. The model of the resistor R46 is 4.7K, the model of the resistor R47 is 10K, and the models of the capacitor C33, the capacitor C34, the capacitor C35 and the capacitor C36 are 0.1 mu F/25V. It is understood that the capacitor C35 and the capacitor C36 may be omitted.

It can be understood that, as an optimization, the internal atmospheric pressure acquisition circuit further includes an RC low-pass filter circuit, the RC low-pass filter circuit is connected with the output end of the amplifier U9, and the voltage signal output by the amplifier U9 is subjected to RC low-pass filtering and then sent to the CPU board assembly 12 for sampling, so that noise interference signals can be effectively filtered.

It is understood that the ground referred to in the internal atmospheric pressure acquisition circuit is an analog ground. The internal atmospheric pressure of the electronic controller is 15-115 Mpa, the output voltage of the internal atmospheric pressure acquisition circuit is (0.2-4.7V), the output voltage signal passes through the RC low-pass filter circuit to eliminate the noise interference signal in the atmospheric pressure sensor, the signal after filtering is followed by voltage, and the result is sent to the CPU board assembly 12 for acquisition, and the acquisition precision is high.

As shown in fig. 10, the IO board assembly 13 is further integrated with a relay output circuit, and the relay output circuit is controlled by the CPU board assembly 12 and provides power to the ignition box, the starting generator controller or the contact box, and the parking solenoid valve according to a control rule. The relay output circuit comprises a relay K1, a resistor R48, a resistor R49, a triode Q3 and a diode D4, the model of the relay K1 is 1JG1-1Y, the first end of the resistor R48 is connected with a power panel component 11, the second end of the resistor R48 is connected with the first end of a resistor R49, the first end of the resistor R49 is connected with a CPU panel component 12, the second end of the resistor R49 is connected with the base of the triode Q3, the collector of the triode Q3 is grounded in a simulation mode, and the emitter of the triode Q3 is connected with a No. 2 pin of the relay K1. No. 1 pin of relay K1 is connected with the solenoid valve that parks, and No. 3 pin and No. 5 pin disconnection of relay K1, No. 6 pin are connected with the ignition box, and No. 4 pin is connected with starting generator controller or contact box, and diode D4's positive terminal digit ground connection, diode D4's negative pole end is connected with No. 4 pin of relay K1. The type of the resistor R48 is 4.7K, the type of the resistor R49 is 2K, the type of the triode Q3 is 3CG100, and the type of the diode D4 is IN4004G.

As shown in fig. 11, the IO board assembly 13 is further provided with a switching value input detection circuit, and the switching value input detection circuit is configured to convert a switching value input signal into a TTL level signal and transmit the TTL level signal to the CPU board assembly 12, where the switching value input signal is from an aircraft control computer, an engine switch, or a ground maintenance box. The switching value input detection circuit comprises a resistor R50, a resistor R51, a capacitor C37 and a photoelectric coupler U10, wherein the model of the photoelectric coupler U10 is TLP291-4, the first end of the resistor R50 is connected with an aircraft control computer or an engine switch or a ground maintenance box, the second end of the resistor R50 is connected with the positive electrode end of a light emitting diode in the photoelectric coupler U10, the first end of the capacitor C37 is connected with the second end of the resistor R50, and the second end of the capacitor C37 is digitally grounded. The negative end of the light emitting diode in the photoelectric coupler U10 is digitally grounded, the emitter of the triode in the photoelectric coupler U10 is grounded in an analog mode, the collector of the triode is connected with the second end of the resistor R51, the first end of the resistor R51 is connected with the power panel assembly 11, and the collector of the triode is further connected with the CPU panel assembly 12. The type of the resistor R50 is 2.7K, the type of the resistor R51 is 4.7K, and the type of the capacitor C37 is 0.1 mu F/16V. The switching value input detection circuit can convert 28V switching value input signals input by an aircraft control computer or an engine switch or a ground maintenance box into TTL level signals so as to be convenient for the CPU board assembly 12 to collect, and is very simple in circuit structure and low in cost.

As shown in fig. 12, a reference voltage output circuit is further integrated on the IO board assembly 13, and the reference voltage output circuit is used for providing a +10V working power supply for the P3 pressure sensor, so that the voltage conversion process is very stable and is not easily disturbed by the outside. The reference voltage output circuit comprises a voltage reference chip U11, a capacitor C38, a capacitor C39, a capacitor C40, a capacitor C41, a resistor R52, a resistor R53, a capacitor C42, a capacitor C43, a capacitor C44 and an operational amplifier U12, wherein the model of the voltage reference chip U11 is REF02CSZ, the model of the operational amplifier U12 is LF347D, a No. 2 pin of the voltage reference chip U11 is connected with a power panel component 11, a first end of the capacitor C38 is connected with a No. 2 pin of the voltage reference chip U11, and a second end of the capacitor C38 is grounded. Pin 6 of the voltage reference chip U11 is connected to the non-inverting input terminal of the operational amplifier U12, the first terminal of the capacitor C39 is connected to pin 6 of the voltage reference chip U11, and the second terminal of the capacitor C39 is grounded. The inverting input terminal of the operational amplifier U12 is connected to the second terminal of the resistor R52, and the first terminal of the resistor R52 is grounded. The positive terminal of the capacitor C41 is connected with the non-inverting input terminal of the operational amplifier U12, and the negative terminal of the capacitor C41 is grounded. A first terminal of the resistor R53 is connected to the inverting input terminal of the operational amplifier U12, and a second terminal of the resistor R53 is connected to the output terminal of the operational amplifier U12. The No. 4 pin of the operational amplifier U12 is connected with the power panel assembly 11, the first end of the capacitor C40 is connected with the No. 4 pin of the operational amplifier U12, and the second end of the capacitor C40 is grounded. Pin 11 of the operational amplifier U12 is connected to the power strip assembly 11, a first terminal of the capacitor C42 is connected to pin 11 of the operational amplifier U12, and a second terminal of the capacitor C42 is grounded. The capacitor C43 has a first terminal connected to the output terminal of the operational amplifier U12 and a second terminal connected to ground. The positive terminal of the capacitor C44 is connected with the output terminal of the operational amplifier U12, and the negative terminal is grounded. The output of the operational amplifier U12 is connected to the P3 pressure sensor to provide +10V operating voltage thereto. The type of the capacitor C38, the type of the capacitor C39, the type of the capacitor C40, the type of the capacitor C42 and the type of the capacitor C43 are 0.1 muF/25V, the type of the capacitor C41 and the type of the capacitor C44 are 10 muF/25V, and the type of the resistor R52 and the type of the resistor R53 are 20K/0.05%. It is understood that the capacitor C40 and the capacitor C42 may be omitted.

It is understood that all references to ground in the reference voltage output circuit are analog grounds. The reference voltage output circuit generates +5V reference voltage through a voltage reference chip, then generates +10V reference voltage by using the in-phase proportional amplification circuit, and outputs the +10V base station voltage to the P3 pressure sensor. The in-phase proportion amplifying circuit is very simple in circuit structure, stable in voltage conversion process and not easy to be interfered by external signals.

As shown in fig. 13, a stepping motor driving circuit is further integrated on the IO board assembly 13, and the stepping motor driving circuit is configured to provide a driving current for a coil of the stepping motor according to a control signal of the CPU board assembly 12. The stepping motor driving circuit comprises a resistor R54, a photoelectric coupler U13, a resistor R55, a resistor R56, a resistor R57, a zener diode D5, an MOS tube Q4, a zener diode D6, a capacitor C45 and a diode D7, wherein the photoelectric coupler U13 is TLP291-4 in model, the MOS tube is IRFF9230 in model, a first end of the resistor R54 is connected with the power panel assembly 11, a second end of the resistor R54 is connected with an anode end of a light emitting diode of the photoelectric coupler U13, a cathode end of the light emitting diode of the photoelectric coupler U13 is connected with the CPU panel assembly 12, an emitter of a triode of the photoelectric coupler U13 is grounded, a collector is connected with a first end of the resistor R55 and a first end of the resistor R56, an anode end of the zener diode D5 is connected with a second end of the resistor R56, a cathode end of the zener diode D5 is connected with a second end of the resistor R55, a second end of the resistor R53 is connected with a gate of the MOS tube Q84 4, the second end of the resistor R55 is connected with the source electrode of the MOS transistor Q4, the source electrode of the MOS transistor Q4 is further connected with the power board assembly 11, and the drain electrode of the MOS transistor Q4 is connected with the stepping motor to output the driving current to the stepping motor. The positive electrode end of the voltage stabilizing diode D6 is grounded, and the negative electrode end of the voltage stabilizing diode D6 is connected with the drain electrode of the MOS tube Q4. The capacitor C45 has a first terminal connected to the drain of the MOS transistor Q4 and a second terminal connected to ground. The resistor R57 has a first terminal connected to the drain of the MOS transistor Q4 and a second terminal connected to ground. The anode terminal of the diode D7 is grounded, and the cathode terminal is connected to the drain of the MOS transistor Q4. The type of the resistor R54 is 510R, the type of the resistor R55 is 15K, the type of the resistor R56 is 10K, the type of the resistor R57 is 1K/1W, the type of the zener diode D5 is BWB12, the type of the zener diode D6 is SML4744, the type of the diode D7 is 2CZ103E, and the type of the capacitor C45 is 3300 pF/50V.

It is to be understood that all references to ground in the stepper motor driver circuit are digital grounds. The stepping motor driving circuit utilizes the cooperative work of the photoelectric coupler U13 and the MOS tube Q4 to realize the supply of driving current for the coil of the stepping motor, realizes digital control, and has simple circuit structure and low cost. In addition, components such as a voltage stabilizing diode and a capacitor are adopted, so that the circuit is more stable in operation and strong in reliability.

The CPU board component 12 is integrated with a single chip microcomputer, wherein the single chip microcomputer is an Intel company EE80C196KC20 single chip microcomputer, a 16-bit CPU is adopted, a program memory is omitted, an external program memory must be expanded, and safety is guaranteed. In addition, the single chip microcomputer also supports 3 paths of PWM output and a full-duplex serial interface, the working temperature range is-55 ℃ to +125 ℃, and the single chip microcomputer can be suitable for various severe temperature environments. In addition, a crystal resonator and a capacitor are integrated on the CPU board assembly 12, and the crystal resonator and the capacitor form a clock circuit of the microcontroller to provide an oscillation frequency of 16MHz required by the operation of the single chip microcomputer. In addition, the software is used for setting the frequency division coefficient, so that the accurate communication baud rate, such as 19200bps, can be generated. The chip of the single chip microcomputer is provided with 128Kbit E2PROM, 64Kbit CMOS SRAM and 16Kbit NVSRAM. Four 8-bit output interfaces and two 8-bit input interfaces are expanded by an encoder and a three-state buffer, and a 4-path RS422 interface is expanded.

As shown in fig. 14, in addition, a hardware reset circuit for resetting the single chip microcomputer is integrated on the CPU board assembly 12, and the hardware reset circuit uses a gate circuit to form the hardware reset circuit, so that the single chip microcomputer is reliably reset when the power is turned on. The hardware reset circuit comprises a NAND gate U14, a resistor R58, a diode D8, a capacitor C46 and a capacitor C47, wherein the model of the NAND gate U14 is 74HCT00D, the first end of the resistor R58 is connected with the power panel assembly 11, the first end of the diode D8 is connected with the power panel assembly 11, the second end of the diode D8 is connected with the second end of the resistor R58, the first end of the capacitor C46 is connected with the second end of the resistor R58, and the second end of the capacitor C46 is grounded. Pin 2 of the nand gate U14 is connected to the second end of the resistor R58, pin 1 is connected to the power board assembly 11, pin 3 is connected to pin 5, pin 7 is grounded, pin 4 is connected to pin 1, pin 14 is connected to the power board assembly 11, pin 14 is connected to the second end of the capacitor C47, and the first end of the capacitor C47 is grounded. And a pin 6 of the NAND gate U14 is connected with the singlechip. The model of the resistor R58 is 20K, the model of the capacitor C46 is 47 mu F/16V, the model of the capacitor C47 is 0.1 mu F/25V, and the model of the diode D8 is 1N 4148W.

It is to be understood that all references to ground in the hardware reset circuit are analog grounds. When the electronic controller is powered on, the power panel component 11 inputs 5V direct current to the hardware reset circuit, the reset of the single chip microcomputer is controlled through logical operation of the NAND gate circuit, the control precision is high, the reaction speed is high, the reliability is high, the circuit structure is very simple, the used electronic components are cheap, and the production cost is reduced.

As shown in fig. 15, an a/D conversion circuit is further integrated on the CPU board assembly 12, and is configured to convert the analog signal output by the IO board assembly 13 into a digital signal and output the digital signal to the single chip. The A/D conversion circuit comprises an OR gate U15, a logic chip U17, an analog-to-digital converter U18, a voltage follower U19, an analog multiplexer U16, a capacitor C48, a capacitor C49, a capacitor 50, a capacitor 51, a capacitor 52, a capacitor 53, a capacitor 54, a capacitor 55, a capacitor 56, a capacitor 57, a capacitor 58, a capacitor 59, a resistor R59, a resistor R60, a resistor R61, a zener diode D9 and a zener diode D10, the model of the OR gate U15 is CD74HC4075M, the model of the logic chip U17 is 74HCT14D hexadecimal inversion Schmitt trigger, the model of the analog-to-digital converter U18 is ADC574AKP, the model of the voltage follower U19 is LM110J-8, the model of the analog multiplexer U16 is HI9P0506-9Z, the analog-to-IO multiplexer U16 is connected with an analog-to-board assembly 13, the singlechip converter U18 is connected with a singlechip, the number of the pin of the OR gate U15 and the pin is, pin number 14 is connected to power strip assembly 11. The first end of the capacitor C59 is connected with the No. 14 pin of the OR gate U15, and the second end is connected with the No. 7 pin of the OR gate U15. No. 6 pin of the OR gate U15 is connected with No. 1 pin of the logic chip U17, No. 7 pin of the logic chip U17 is grounded, No. 14 pin is connected with the power panel component 11, and No. 2 pin is connected with No. 6 pin of the analog-to-digital converter U18. The resistor R59 has a first end connected to the power strip assembly 11 and a second end connected to pin No. 7 of the analog-to-digital converter U18. The positive terminal of the capacitor C51 and the first terminal of the capacitor C52 are both connected with the pin No. 7 of the analog-to-digital converter U18, the negative terminal of the capacitor C51 and the second terminal of the capacitor C52 are grounded, and the pin No. 9 of the analog-to-digital converter U18 is grounded. The resistor R60 has a first end connected to the power strip assembly 11 and a second end connected to pin 11 of the analog-to-digital converter U18. The positive terminal of the capacitor C53 and the first terminal of the capacitor C54 are grounded, and the negative terminal of the capacitor C53 and the second terminal of the capacitor C54 are connected with the No. 11 pin of the analog-to-digital converter U18. The pin 1 of the analog-to-digital converter U18 is connected with the power panel assembly 11, the positive terminal of the capacitor C55 and the first terminal of the capacitor C56 are connected with the pin 1 of the analog-to-digital converter U18, and the negative terminal of the capacitor C55 and the second terminal of the capacitor C56 are grounded. No. 33 pin and No. 27 pin of the analog multiplexer U16 are respectively connected with the power supply board assembly 11, the first end of the capacitor C48 and the first end of the capacitor C49 are grounded, the second end of the capacitor C48 is connected with the No. 33 pin of the analog multiplexer U16, and the second end of the capacitor C49 is connected with the No. 27 pin of the analog multiplexer U16. The output end of the analog multiplexer U16, i.e., pin 28, is connected to the first end of the resistor R61, the second end of the resistor R61 is connected to the third pin of the voltage follower U19, the negative end of the zener diode D9 is connected to the second end of the resistor R61, the positive end of the zener diode D10 is connected to the positive end of the zener diode D9, and the negative end of the zener diode D10 is grounded. No. 4 pin and No. 7 pin of voltage follower U19 are connected with power strip subassembly 11 respectively, and the first end ground of electric capacity C58, the second end of electric capacity C58 is connected with No. 7 pin of voltage follower U19, and the first end of electric capacity C57 is connected with No. 4 pin of voltage follower U19, and the second end ground of electric capacity C57. The output terminal of the voltage follower U19, pin 6, is connected to pin 14 of the analog-to-digital converter U18. The type of the capacitor C59, the capacitor C48, the capacitor C49, the capacitor C50, the capacitor C56, the capacitor C54, the capacitor C52, the capacitor C57 and the capacitor C58 is 0.1 muF/25V, the type of the capacitor C51, the capacitor C53 and the capacitor C55 is 22 muF/25V, the type of the resistor R59 and the resistor R60 is 21.5R, the type of the resistor R61 is 10K, and the type of the zener diode D9 and the type of the zener diode D10 are BZX84C 10.

It is understood that the grounds referred to in the a/D conversion circuit are all analog grounds. The output ends of the thermocouple signal conditioning circuit, the internal temperature acquisition circuit, the pressure signal conditioning circuit, the internal atmospheric pressure acquisition circuit, the thermal resistance signal conditioning circuit and the like on the IO board assembly 13 output multiple analog quantity signals which enter the analog-to-digital converter U18 in a time sharing manner through the analog multiplexer U16, and the analog quantity signals firstly pass through the zener diode for amplitude limiting before entering the analog-to-digital converter U18 and then are output to the analog-to-digital converter U18 through the voltage follower U19. The analog-to-digital conversion process block has the conversion time of only 35 mu s, and the circuit has simple structure and low cost.

The CPU board assembly 12 is further integrated with an RVDT conversion circuit, the RVDT conversion circuit is used for providing excitation for the oil needle position sensor and the throttle lever position sensor and collecting RVDT signals, the RVDT conversion circuit comprises an RC bridge type oscillation circuit, a push-pull output circuit, a rotary variable digital converter and peripheral circuits thereof, the RC bridge type oscillation circuit is used for generating excitation signals, the push-pull output circuit is used for driving the oil needle position sensor and the throttle lever position sensor, the rotary variable digital converter and the peripheral circuits thereof are used for collecting displacement signals for driving the oil needle position sensor and the throttle lever position sensor and converting the displacement signals into digital signals which are then transmitted to the single chip microcomputer, the push-pull output circuit is respectively connected with the RC bridge type oscillation circuit, the rotary variable digital converter and the peripheral circuits thereof, and the push-pull output circuit is connected with the oil needle position sensor and the throttle lever position sensor, the rotary digital converter and the peripheral circuit thereof are connected with the oil needle position sensor and the throttle lever position sensor.

As shown in fig. 16, the RC bridge oscillator circuit includes a resistor R62, a resistor R63, a resistor R64, a resistor R65, a resistor R66, a resistor R67, a potentiometer R68, a capacitor C68, a diode D68, and an operational amplifier U68, where the model of the potentiometer R68 is 3224W-1-103E, the model of the operational amplifier U68 is OPA277 68, a first end of the resistor R68 is grounded, a second end of the resistor R68 is connected to an inverting input terminal of the operational amplifier U68, a second end of the resistor R68 is connected to pin No. 2 of the potentiometer R68, i.e., to a sliding end thereof, a pin No. of the potentiometer R68 is connected to a first end of the resistor R68, a second end of the resistor R68 is connected to a first end of the resistor R68, a negative end of the diode R68 and a negative end of the diode D68 are connected to a diode D68, the second end of the resistor R67 is connected with the push-pull output circuit. No. 7 pin and No. 4 pin of the operational amplifier U20 are respectively connected with the power panel assembly 11, the first end of the capacitor C60 is connected with the No. 4 pin of the operational amplifier U20, the second end of the capacitor C60 is grounded, the first end of the capacitor C61 is connected with the No. 7 pin of the operational amplifier U20, and the second end of the capacitor C61 is grounded. The non-inverting input end of the operational amplifier U20, that is, the pin 3, is connected to the first end of the resistor R64, the first end of the resistor R65, and the first end of the capacitor C62, respectively, the second end of the resistor R64 and the second end of the capacitor C62 are grounded, the second end of the resistor R65 is connected to the first end of the capacitor C63, and the second end of the capacitor C63 is connected to the push-pull output circuit. The output terminal of the operational amplifier U20, pin 6, is connected to the first terminal of the resistor R66, and the second terminal of the resistor R66 is connected to the push-pull output circuit. The type of the resistor R62, the type of the resistor R63 and the type of the resistor R67 are 10K, the type of the resistor R66 is 51R, the type of the resistor R64 and the type of the resistor R65 are 5.6K/0.1%, the type of the capacitor C60 and the type of the capacitor C61 are 0.1 mu F/25V, the type of the capacitor C62 and the type of the capacitor C63 are 10 nF% 1/50V, and the type of the diode D11 and the type of the diode D12 are IN4004G. The RC bridge oscillator circuit can generate a 2.8KHz sine wave excitation signal.

The push-pull output circuit comprises a resistor R69, a resistor R70, a resistor R71, a resistor R72, a resistor R73, a diode D13, a diode D14, a diode D15, a diode D16, a triode Q5, a triode Q6, a capacitor C64 and a capacitor C65, wherein a first end of the resistor R69 is connected with a second end of the resistor R66, a second end of the resistor R69 is connected with the rotary digital converter and peripheral circuits thereof, and a second end of the resistor R69 is connected with a second end of the resistor R67 and a second end of the capacitor C63. The positive terminal of the diode D13, the base of the triode Q5, the negative terminal of the diode D15 and the base of the triode Q6 are connected with the second end of the resistor R66, the collector of the triode Q5 is connected with the second end of the resistor R71, the first end of the resistor R71 is connected with the power panel assembly 11, the positive terminal of the capacitor C64 is connected with the collector of the triode Q5, and the negative terminal of the capacitor C64 is grounded. An emitter of the transistor Q5 is connected to a first terminal of the resistor R70, a cathode of the diode D13 is connected to an anode of the diode D14, and a cathode of the diode D14 is connected to a second terminal of the resistor R70 and a second terminal of the resistor R69. The positive terminal of the diode D15 is connected to the negative terminal of the diode D16, and the positive terminal of the diode D16 is connected to the second terminal of the resistor R69. An emitter of the transistor Q6 is connected to a second terminal of the resistor R72, and a first terminal of the resistor R72 is connected to a positive terminal of the diode D16. The collector of the transistor Q6 is connected to the second terminal of the resistor R73 and the first terminal of the capacitor C65, the first terminal of the resistor R73 is connected to the power board assembly 11, and the second terminal of the capacitor C65 is grounded. The type of the resistor R69 is 1K, the types of the resistor R71 and the resistor R73 are 33R, the types of the resistor R70 and the resistor R72 are 10R, the types of the capacitor C64 and the capacitor C65 are 10 muF/25V, the types of the diode D1, the diode D2, the diode D3 and the diode D4 are 1N4147W, the type of the triode Q5 is BC817, and the type of the triode Q6 is BV 807. And the output end of the push-pull output circuit is connected with the oil needle position sensor and the throttle lever position sensor.

As shown in fig. 17, the rotary digital converter and its peripheral circuits include a rotary digital converter U21, an or gate U22, a capacitor C66, a capacitor C67, a capacitor C68, a capacitor C69, a capacitor C70, a capacitor C71, a capacitor C72, a capacitor C73, a capacitor C74, a capacitor C75, a capacitor C76, a capacitor C77, a capacitor C78, a capacitor C79, a resistor R74, a resistor R75, a resistor R76, a potentiometer R77, a resistor R78, a resistor R79, a resistor R80, a resistor R81, and a resistor R82, the rotary digital converter U21 is of a type AD2S83AP, a first end of the capacitor C66 is connected to an output terminal of the output circuit, i.e., to a second end of the resistor R69, a second end of the capacitor C66 is connected to a pin No. 2 of the rotary digital converter U21, and a first end of the resistor R75 is connected to a second end of the push-pull terminal of the capacitor R75 and a second end of the push-pull terminal. Pin 3 of the rotary digital converter U21 is connected to the second terminal of the resistor R76, the first terminal of the resistor R76 is connected to the second terminal of the capacitor C68, and the first terminal of the capacitor C68 is connected to pin 44 of the rotary digital converter U21. The capacitor C67 has a first terminal connected to ground and a second terminal connected to pin 44 of the rotary digital converter U21. The resistor R74 has a first terminal connected to ground and a second terminal connected to pin 44 of the rotary digital converter U21. No. 8 pin, No. 39 pin and No. 26 pin of the rotary digital converter U21 are all connected with the power panel assembly 11, the first end of the capacitor C69 is connected with the No. 8 pin of the rotary digital converter U21, and the second end of the capacitor C69 is grounded. The first terminal of the capacitor C70 is connected to pin 39 of the rotary digital converter U21, and the second terminal is connected to ground. The first terminal of the capacitor C71 is connected to pin 26 of the rotary digital converter U21, and the second terminal is connected to ground. The input end of the or gate U22 is connected with the single chip microcomputer, and the output end of the or gate U22 is connected with a No. 27 pin of the rotary digital converter U21. The pin 3 and the pin 1 of the potentiometer R77 are respectively connected to the power board assembly 11, the pin 2 is connected to the first end of the resistor R78, the second end of the resistor R78 is respectively connected to the first end of the resistor R77, the pin 43 of the rotary digital converter U21, and the first end of the resistor R79, the second end of the resistor R77 is connected to the pin 1 of the rotary digital converter U21, the second end of the resistor R79 is connected to the first end of the capacitor C73, and the second end of the capacitor C73 is connected to the pin 42 of the rotary digital converter U21. A first terminal of the capacitor C72 is connected to a first terminal of the capacitor C73, and a second terminal of the capacitor C72 is connected to a second terminal of the capacitor C73. The first terminal of the capacitor C74 is connected to pin 43 of the rotary digital converter U21, and the second terminal is connected to the second terminal of the capacitor C73. The capacitor C75 has a first terminal connected to pin 43 of the rotary digital converter U21 and a second terminal connected to pin 42 of the rotary digital converter U21. The resistor R81 has a first terminal connected to pin 42 of the rotary digital converter U21 and a second terminal connected to pin 40 of the rotary digital converter U21. The first end of the capacitor C76 and the first end of the capacitor C77 are both connected with pin number 41 of the rotary digital converter U21, the second end of the capacitor C76 and the second end of the capacitor C77 are both connected with pin number 40 of the rotary digital converter U21, the first end of the resistor R82 is connected with pin number 41 of the rotary digital converter U21, the second end of the resistor R82 is respectively connected with the first end of the capacitor C78 and the first end of the capacitor C79, and the second end of the capacitor C78 and the second end of the capacitor C79 are grounded. The output end of the rotary digital converter U21 is connected with a bus, and the rotary digital converter U21 is also connected with an oil pointer position sensor and an oil throttle lever position sensor to acquire displacement signals of the oil pointer position sensor and the oil throttle lever position sensor. The type of the capacitor C66 is 10 nF% 1/50V, the types of the capacitor C67 and the capacitor C68 are 3.3nF/50V, the types of the capacitor C69, the capacitor C70 and the capacitor C71 are 0.1 muF/25V, the types of the capacitor C72 and the capacitor C73 are 27nF/50V, the types of the capacitor C74 and the capacitor C75 are 5.6nF/50V, the types of the capacitor C76 and the capacitor C77 are 150pF/50V, the types of the capacitor C78 and the capacitor C79 are 390pF/50V, the types of the resistor R75 and the resistor R81 are 100K, the types of the resistor R76 and the resistor R74 are 20K, the types of the potentiometer R77 are 3224W-1-105E, the type of the resistor R78 is 4.7M, the type of the resistor R79 is 120K, the type of the resistor R4072 is 20K, the type of the resistor R72 is 3224W-1-105E, the type of the resistor R72 is 3674K, and the type of the resistor R79 is 79 or the type HC-3675.

The RVDT conversion circuit can not only provide excitation signals for the oil needle position sensor and the throttle lever position sensor, but also collect displacement signals of the oil needle position sensor and convert the displacement signals into digital signals to be transmitted to the bus, and then the digital signals are transmitted to the single chip microcomputer to be subjected to operation processing.

As shown in fig. 18, an LVDT conversion circuit is further integrated on the CPU board assembly 12, and is configured to collect and transmit the displacement signal of the pitch sensor to an input terminal of an analog multiplexer U16 of the a/D conversion circuit. The LVDT conversion circuit comprises an LVDT signal regulator U23, a resistor R83, a capacitor C80, a capacitor C81, a capacitor C82, a capacitor C83, a resistor R91, a resistor R84, a resistor R85, a capacitor C84, a capacitor C85, a capacitor C86, a resistor R86, a resistor R92, a resistor R93, a capacitor C87, a capacitor C88, a resistor R87, a resistor R88, a capacitor C89, a resistor R89, a resistor R90, a capacitor C90, a zener diode D17 and a zener diode D18. The LVDT signal regulator U23 is AD698AP, the first end of the resistor R83 is connected with the power panel assembly 11, the second end of the resistor R83 is connected with the pin 1 of the LVDT signal regulator U23, the positive end of the capacitor C80 and the first end of the capacitor C81 are grounded, and the negative end of the capacitor C80 and the second end of the capacitor C81 are connected with the pin 1 of the LVDT signal regulator U23. The negative terminal of the capacitor C82 and the first terminal of the capacitor C83 are grounded, the positive terminal of the capacitor C82 and the second terminal of the capacitor C83 are connected to pin 28 of the LVDT signal conditioner U23, pin 28 of the LVDT signal conditioner U23 is connected to the first terminal of the resistor R91, and the second terminal of the resistor R91 is connected to the power board assembly 11. Pin 2 of the LVDT signal conditioner U23 is connected to pin 18, and pin 3 is connected to pin 14 and pin 17 respectively. The No. 5 pin of the LVDT signal regulator U23 is connected with the No. 6 pin through a resistor R84 and a resistor R85 in sequence. The first terminal of the capacitor C84 and the first terminal of the capacitor C85 are connected to pin No. 7 of the LVDT signal conditioner U23, and the second terminal of the capacitor C84 and the second terminal of the capacitor C85 are connected to pin No. 8 of the LVDT signal conditioner U23. A first terminal of the capacitor C86 is connected to pin 10 of the LVDT signal conditioner U23, and a second terminal of the capacitor C86 is connected to pin 11 of the LVDT signal conditioner U23. Pin 15 of LVDT signal regulator U23 is connected to the second terminal of resistor R86, the first terminal of resistor R86 is connected to ground, and pin 15 of LVDT signal regulator U23 is also connected to the pitch sensor. Pin 16 of LVDT signal conditioner U23 is connected to a pitch sensor. A first terminal of the capacitor C88 is connected to pin 20 of the LVDT signal conditioner U23, and a second terminal of the capacitor C88 is connected to pin 19 of the LVDT signal conditioner U23. A first terminal of the capacitor C87 is connected to pin 21 of the LVDT signal conditioner U23, and a second terminal of the capacitor C87 is connected to pin 22 of the LVDT signal conditioner U23. The output terminal of the LVDT signal regulator U23, pin 23, is connected to a resistor R90, and a second terminal of the resistor R90 is connected to the a/D conversion circuit on the IO board assembly 13. The first end of the resistor R87 is connected with the output end of the LVDT signal regulator U23, the second end of the resistor R87 is connected with the first end of the resistor R88, and the second end of the resistor R88 is connected with the No. 22 pin of the LVDT signal regulator U23. A first terminal of capacitor C89 is connected to the output of LVDT signal conditioner U23 and a second terminal of capacitor C89 is connected to the output of LVDT signal conditioner U23. The first end of the resistor R89 is connected with pin No. 22 of the LVDT signal regulator U23, and the second end of the resistor R89 is grounded. The first end of the capacitor C90 is connected to the second end of the resistor R90, and the second end of the capacitor C90 is grounded. The positive terminal of the zener diode D17 is connected with the second terminal of the resistor R90, the negative terminal of the zener diode D17 is connected with the negative terminal of the zener diode D18, and the positive terminal of the zener diode D18 is grounded. A first terminal of the resistor R92 is connected to ground and a second terminal of the resistor R92 is connected to the pitch sensor to connect sin-ground in the pitch sensor. A first terminal of resistor R93 is connected to ground and a second terminal of resistor R93 is connected to the pitch sensor to ground the cos-in-pitch sensor. The types of the resistor R83, the resistor R91, the resistor R92 and the resistor R93 are 0R, the types of the resistor R84 and the resistor R85 are 5.6K/0.1%, the type of the resistor R86 is 1M, the types of the resistor R87 and the resistor R88 are 4.7K/0.1%, the type of the resistor R89 is 4.7K, the type of the resistor R90 is 1K, the types of the capacitor C80 and the capacitor C82 are 10 muF/25V, the types of the capacitor C81, the capacitor C83 and the capacitor C90 are 0.1 muF/25V, the types of the capacitor C84 and the capacitor C85 are 15nF/50V, the types of the capacitor C86, the capacitor C87 and the capacitor C88 are 0.47 muF/25V, the type of the capacitor C89 is 1000pF/50V, and the types of the zener diode D17 and the zener diode D18 are ZX 72C 84.

The LVDT conversion circuit only acquires sin + and cos + by grounding sin-and cos-signals in the pitch sensor signals, which is equivalent to converting the pitch sensor signals by taking the ground as a reference, so that the acquisition precision is better, the acquisition speed is higher, the circuit structure is simple, and the cost is low.

As shown in fig. 19, an RS422 serial port expansion circuit is further integrated on the CPU board assembly 12, the single chip microcomputer itself only has one RS232 interface circuit and cannot meet the communication requirement, and the RS422 serial port expansion circuit is used for expanding the interface of the single chip microcomputer and converting the RS232 communication interface into an RS422 communication interface. The RS422 serial port extension circuit includes a two-way universal asynchronous transceiver circuit and an RS422 conversion chip (not shown), the two-way universal asynchronous transceiver circuit is used to extend two RS232 serial interfaces, and the RS422 conversion chip is used to convert one way of RS232 communication interface carried by the single chip microcomputer and two ways of RS232 serial interfaces extended by the two-way universal asynchronous transceiver circuit into RS422 serial interfaces, respectively. The two-way universal asynchronous transceiver circuit comprises a universal asynchronous transceiver U24, an OR gate U25, a capacitor C91, a capacitor C92, a capacitor C93 and a crystal oscillator G1, wherein the model of the universal asynchronous transceiver U24 is TL16C2552FN, the model of the OR gate U25 is CD74HC4075M, a No. 13 pin of the universal asynchronous transceiver U24 is connected with a second end of the capacitor C92, a first end of the capacitor C92 is grounded, a first end of the capacitor C91 is grounded, and a second end of the capacitor C91 is connected with a No. 11 pin of the universal asynchronous transceiver U24. The first terminal of the crystal oscillator G1 is connected to the second terminal of the capacitor C91, and the first terminal of the crystal oscillator G1 is connected to the second terminal of the capacitor C92. Pin number 33, pin number 42, pin number 43 and pin number 41 of the universal asynchronous receiver/transmitter U24 are connected with the power panel assembly 11, the first end of the capacitor C93 is grounded, and the second end of the capacitor C93 is connected with pin number 33 of the universal asynchronous receiver/transmitter U24. No. 2-16 pins of the universal asynchronous transceiver U24 are connected with the single chip microcomputer, No. 34 pin of the universal asynchronous transceiver U24 is connected with No. 8 pin of the OR gate U25, No. 17 pin of the universal asynchronous transceiver U24 is connected with No. 2 pin of the OR gate U25, No. 1 pin of the OR gate U25 is grounded, No. 9 pin of the OR gate U25 is connected with the single chip microcomputer, and the No. 17 pin and the No. 34 pin of the universal asynchronous transceiver U24 are further connected with the single chip microcomputer. Pin 38 and pin 39 of the universal asynchronous receiver and transmitter U24 serve as output pins of one RS232 communication interface, and pin 25 and pin 26 serve as output pins of one RS232 communication interface. No. 38 pin, No. 39 pin, No. 25 pin and No. 26 pin of the universal asynchronous receiver and transmitter U24 are all connected with the RS422 conversion chip, and the RS422 conversion chip is also connected with the RS232 communication interface on the single chip microcomputer. The model of the capacitor C91 and the model of the capacitor C92 are 33pF/50V, the model of the capacitor C93 is 0.1 muF/25V, and the model of the crystal oscillator G1 is JA8-14.7456 MHz. RS422 serial ports expander circuit can expand three interface to a single chip computer's an interface, converts the interface type from RS232 to RS422 moreover, and interface communication speed is faster, can satisfy the demand that many mouths communicate simultaneously well, and in addition, RS422 serial ports expander circuit's circuit structure is simple, and the integrated level is high, low cost.

The electronic controller of the invention integrates various signal processing circuits, has high circuit integration level, small volume and low cost, can comprehensively and automatically control the starting, steady-state, acceleration and deceleration and stopping processes of the engine, ensures that the engine has good steady-state and transient-state performance, and ensures that the engine can stably and reliably work.

Another embodiment of the present invention also provides a drone comprising an electronic controller as described above.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. An electronic controller is used for realizing electronic control on a turboprop engine and is characterized in that,

comprises a power board component (11), a CPU board component (12) and an IO board component (13);

the power board assembly (11) is used for converting input power;

the IO board assembly (13) is respectively connected with a sensor and an actuating mechanism of the engine, and the IO board assembly (13) is used for conditioning signals input by the sensor into signals capable of being collected by the CPU board assembly (12) and driving the actuating mechanism of the engine based on control signals output by the CPU board assembly (12);

the CPU board component (12) is used for carrying out signal acquisition, signal analysis and processing and signal control;

the power board assembly (11) is respectively connected with the CPU board assembly (12) and the IO board assembly (13), and the IO board assembly (13) is connected with the CPU board assembly (12);

the CPU board component (12) is integrated with an RVDT conversion circuit, the RVDT conversion circuit is used for providing excitation for the oil needle position sensor and the throttle lever position sensor and collecting RVDT signals, the RVDT conversion circuit comprises an RC bridge type oscillation circuit, a push-pull output circuit, a rotary variable digital converter and a peripheral circuit thereof, the RC bridge type oscillation circuit is used for generating excitation signals, the push-pull output circuit is used for driving the oil needle position sensor and the throttle lever position sensor, the rotary variable digital converter and the peripheral circuit are used for collecting displacement signals for driving the oil needle position sensor and the throttle lever position sensor and converting the displacement signals into digital signals and then transmitting the digital signals to the single chip microcomputer, the push-pull output circuit is respectively connected with the RC bridge type oscillation circuit, the rotary variable digital converter and the peripheral circuit thereof, and the push-pull output circuit is connected with the oil needle position sensor and the throttle lever position sensor, the rotary digital converter and the peripheral circuit thereof are connected with the oil needle position sensor and the throttle lever position sensor;

the RC bridge oscillation circuit comprises a resistor R62, a resistor R63, a resistor R64, a resistor R65, a potentiometer R65, a capacitor C65, a diode D65 and an operational amplifier U65, wherein a first end of the resistor R65 is grounded, a second end of the resistor R65 is connected with an inverting input end of the operational amplifier U65, a second end of the resistor R65 is connected with a pin No. 2 of the potentiometer R65, a pin No. of the potentiometer R65 is connected with a first end of the resistor R65, a second end of the resistor R65 is respectively connected with a first end of the resistor R65, a negative end of the diode D65 and a positive end of the diode D65, a second end of the resistor R65 is respectively connected with a positive end of the diode D65 and a negative end of the diode D65, a second end of the resistor R65 is connected with a push-pull-up amplifier U72 and a first end of the operational amplifier U364 are respectively connected with the first, the second end of the capacitor C60 is grounded, the first end of the capacitor C61 is connected with the pin No. 7 of the operational amplifier U20, the second end of the capacitor C61 is grounded, the non-inverting input end of the operational amplifier U20 is respectively connected with the first end of the resistor R64, the first end of the resistor R65 and the first end of the capacitor C62, the second end of the resistor R64 and the second end of the capacitor C62 are grounded, the second end of the resistor R65 is connected with the first end of the capacitor C63, the second end of the capacitor C63 is connected with a push-pull output circuit, the output end of the operational amplifier U20 is connected with the first end of the resistor R66, and the second end of the resistor R66 is connected with the push-pull output;

the push-pull output circuit comprises a resistor R69, a resistor R70, a resistor R71, a resistor R72, a diode D72, a transistor Q72, a capacitor C72 and a capacitor C72, wherein a first end of the resistor R72 is connected with a second end of the resistor R72, a second end of the resistor R72 is connected with the rotary digital converter and peripheral circuits thereof, a second end of the resistor R72 is connected with the second end of the resistor R72 and the second end of the capacitor C72, a positive terminal of the diode D72, a base of the transistor Q72, a negative terminal of the diode D72 and a base of the transistor Q72 are connected with the second end of the resistor R72, a collector of the transistor Q72 is connected with a power supply, a positive terminal of the capacitor C72 is connected with a collector of the transistor Q72, a negative terminal of the capacitor C72 is connected with the second end of the transistor R72, and a cathode of the resistor R72 is connected with the emitter of the transistor R72, the negative end of a diode D13 is connected with the positive end of a diode D14, the negative end of a diode D14 is connected with the second end of a resistor R70 and the second end of a resistor R69, the positive end of a diode D15 is connected with the negative end of a diode D16, the positive end of a diode D16 is connected with the second end of the resistor R69, the emitter of a triode Q6 is connected with the second end of the resistor R72, the first end of a resistor R72 is connected with the positive end of the diode D16, the collector of a triode Q6 is connected with the second end of the resistor R73 and the first end of a capacitor C65, the first end of the resistor R73 is connected with a power supply, the second end of the capacitor C65 is grounded, and the output end of a push-pull output circuit is respectively connected with an oil needle position sensor and an oil;

the rotary digital converter and the peripheral circuit thereof comprise a rotary digital converter U21, an OR gate U22, a capacitor C66, a capacitor C67, a capacitor C68, a capacitor C69, a capacitor C70, a capacitor C71, a capacitor C72, a capacitor C73, a capacitor C74, a capacitor C75, a capacitor C76, a capacitor C77, a capacitor C78, a capacitor C79, a resistor R74, a resistor R75, a resistor R76, a potentiometer R77, a resistor R78, a resistor R79, a resistor R80, a resistor R81 and a resistor R82, wherein a first end of the capacitor C66 is connected with an output end of the push-pull output circuit, a second end of the capacitor C66 is connected with a pin No. 2 of the rotary digital converter U66, a first end of the resistor R66 is connected with a second end of the capacitor C66, a second end of the resistor R66 is connected with a ground, a pin No. 3 of the variable digital converter U66 is connected with a second end of the capacitor C66, and a second end of the capacitor C66 is connected with a second end of the capacitor C66, the first terminal of the capacitor C67 is grounded, the second terminal thereof is connected to pin 44 of the rotary digital converter U21, the first terminal of the resistor R74 is grounded, and the second terminal thereof is connected to pin 44 of the rotary digital converter U21. The No. 8 pin, the No. 39 pin and the No. 26 pin of the rotary digital converter U21 are connected with the power panel assembly 11, the first end of a capacitor C69 is connected with the No. 8 pin of the rotary digital converter U21, the second end of the capacitor C69 is grounded, the first end of a capacitor C70 is connected with the No. 39 pin of the rotary digital converter U21, the second end of a capacitor C70 is grounded, the first end of a capacitor C71 is connected with the No. 26 pin of the rotary digital converter U21, and the second end of a capacitor C71 is grounded; the input end of the OR gate U22 is connected with the singlechip, the output end of the OR gate U22 is connected with a pin No. 27 of the variable digital converter U21, a pin No. 3 and a pin No. 1 of the potentiometer R77 are respectively connected with a power supply, a pin No. 2 is connected with a first end of a resistor R78, a second end of the resistor R78 is respectively connected with a first end of a resistor R77, a pin No. 43 of the variable digital converter U21 and a first end of a resistor R79, a second end of the resistor R77 is connected with a pin No. 1 of the variable digital converter U21, a second end of the resistor R79 is connected with a first end of a capacitor C73, a second end of the capacitor C73 is connected with a pin No. 42 of the variable digital converter U21, a first end of the capacitor C72 is connected with a first end of a capacitor C73, a second end of the capacitor C72 is connected with a second end of a capacitor C73, a first end of the variable digital converter U74 is connected with a pin No. 43 of the variable digital converter U5, a first end of a capacitor C75 is connected to pin 43 of the rotary digital converter U21, a second end of a capacitor C75 is connected to pin 42 of the rotary digital converter U21, a first end of a resistor R81 is connected to pin 42 of the rotary digital converter U21, a second end of the capacitor C75 is connected to pin 40 of the rotary digital converter U21, a first end of a capacitor C76 and a first end of a capacitor C77 are both connected to pin 41 of the rotary digital converter U21, a second end of a capacitor C76 and a second end of a capacitor C77 are both connected to pin 40 of the rotary digital converter U21, a first end of a resistor R82 is connected to pin 41 of the rotary digital converter U21, a second end of a resistor R82 is connected to a first end of a capacitor C78 and a first end of a capacitor C79, a second end of a capacitor C78 and a second end of a capacitor C79 are grounded, an output terminal of the rotary digital converter U21 is connected to a bus, an oil level sensor U21 and a displacement sensor lever 21 for acquiring displacement signals.

2. The electronic controller of claim 1,

and a rotating speed signal conditioning circuit is integrated on the IO board component (13) and is used for conditioning sinusoidal signals input by an Ng rotating speed sensor and/or an Ns rotating speed sensor into signals capable of being collected by the CPU board component (12), wherein the Ng rotating speed sensor is used for detecting the rotating speed of an engine turbine, and the Ns rotating speed sensor is used for detecting the rotating speed of a propeller.

3. The electronic controller of claim 2,

the rotating speed signal conditioning circuit comprises a voltage division module (131), an amplitude limiting module (132), a filtering module (133), a signal conversion module (134) and an optical coupling isolation module (135) which are connected in sequence;

the voltage division module (131) is used for dividing voltage signals input by the Ng rotating speed sensor and/or the Ns rotating speed sensor;

the amplitude limiting module (132) is used for flattening the amplitude of the sine wave signal input by the Ng sensor and/or the Ns sensor according to the set amplitude range;

the filtering module (133) is used for filtering the signals input by the Ng sensor and/or the Ns sensor;

the signal conversion module (134) is used for converting sine wave signals input by the Ng sensor and/or the Ns sensor into square wave signals;

the optical coupling isolation module (135) is used for isolating the input signal and the output signal.

4. The electronic controller of claim 1,

and a thermal resistance temperature signal conditioning circuit is further integrated on the IO board assembly (13) and used for conditioning the signal input by the lubricating oil temperature sensor into a signal which can be acquired by the CPU board assembly (12).

5. The electronic controller of claim 4,

the thermal resistance temperature signal conditioning circuit comprises an excitation signal circuit and a signal amplifying circuit which are connected;

the signal amplifying circuit is used for amplifying the signal output by the excitation signal circuit and transmitting the signal to the CPU board component (12).

6. The electronic controller of claim 1,

and a thermocouple temperature signal conditioning circuit is further integrated on the IO board assembly (13) and used for conditioning signals input by a thermocouple into signals capable of being collected by the CPU board assembly (12).

7. The electronic controller of claim 1,

the CPU board component (12) is integrally provided with a singlechip and an RS422 serial port extension circuit which are connected, and the singlechip is only provided with an RS232 communication interface;

8. The electronic controller of claim 7,

the RS422 serial port extension circuit comprises a two-way universal asynchronous transceiver circuit and an RS422 conversion chip;

9. The electronic controller of claim 8,

the two-way universal asynchronous transceiver circuit comprises a universal asynchronous transceiver U24, an OR gate U25, a capacitor C91, a capacitor C92, a capacitor C93 and a crystal oscillator G1, wherein the model of the universal asynchronous transceiver U24 is TL16C2552FN, or the model of the gate U25 is CD74HC 4075M;

10. An unmanned aerial vehicle comprising an electronic controller as claimed in any of claims 1 to 9.