CN113202653A - Automatic measuring system for engine running data - Google Patents
Automatic measuring system for engine running data Download PDFInfo
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- CN113202653A CN113202653A CN202110560332.5A CN202110560332A CN113202653A CN 113202653 A CN113202653 A CN 113202653A CN 202110560332 A CN202110560332 A CN 202110560332A CN 113202653 A CN113202653 A CN 113202653A
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- rotating speed
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- 230000003750 conditioning effect Effects 0.000 claims abstract description 32
- RZVHIXYEVGDQDX-UHFFFAOYSA-N 9,10-anthraquinone Chemical compound C1=CC=C2C(=O)C3=CC=CC=C3C(=O)C2=C1 RZVHIXYEVGDQDX-UHFFFAOYSA-N 0.000 claims abstract description 17
- 238000007493 shaping process Methods 0.000 claims description 5
- 238000000034 method Methods 0.000 description 5
- 230000005540 biological transmission Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003990 capacitor Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000006870 function Effects 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
- 230000001052 transient effect Effects 0.000 description 1
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D45/00—Electrical control not provided for in groups F02D41/00 - F02D43/00
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D2200/00—Input parameters for engine control
- F02D2200/02—Input parameters for engine control the parameters being related to the engine
- F02D2200/10—Parameters related to the engine output, e.g. engine torque or engine speed
- F02D2200/101—Engine speed
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Arrangements For Transmission Of Measured Signals (AREA)
Abstract
An automatic measuring system for engine running data comprises a rotating speed sensor for sensing the rotating speed of an engine, a rotating speed signal conditioning circuit for converting a rotating speed signal acquired by the rotating speed sensor into a TTL level signal, a bus for transmitting running time data, a central processing unit for analyzing the data, and an internal memory for storing the data; the rotation speed sensor is connected with the central processing unit through the rotation speed signal conditioning circuit, the central processing unit is connected with the internal memory, and the central processing unit is also connected with an external flight control computer through a bus. The scheme provides a device for automatically detecting the rotating speed, which automatically counts, stores and uploads and realizes omnibearing automation.
Description
Technical Field
The invention relates to the field of rotating speed statistics, in particular to an automatic measuring system for engine running data.
Background
The service life control of the aircraft engine is extremely important for the reliable use of the engine, and accurate statistics of the running time of the engine is required in the service life control. The traditional engine running time statistical mode is that a detachable process recorder is manually recorded or installed, and relevant time information is read through ground equipment after the process recorder is detached. The former needs manual operation, and the latter needs dismouting many times on the aircraft, and efficiency is all lower.
Disclosure of Invention
The invention aims to: the utility model provides an engine running data automatic measurement system, set up speed sensor on aircraft engine, after the rotational speed of gathering the engine, convert TTL level signal into through rotational speed signal conditioning circuit, then send central processing unit to handle and resolve out rotational speed and the running time of engine, then central processing unit with rotational speed and running time save in the memory, send the data to the flight control computer through the bus and show simultaneously, provide an automated inspection rotational speed's device, solved above-mentioned problem.
The technical scheme adopted by the invention is as follows:
an automatic measuring system for engine running data comprises a rotating speed sensor for sensing the rotating speed of an engine, a rotating speed signal conditioning circuit for converting a rotating speed signal acquired by the rotating speed sensor into a TTL level signal, a bus for transmitting running time data, a central processing unit for analyzing the data, and an internal memory for storing the data;
the rotation speed sensor is connected with the central processing unit through the rotation speed signal conditioning circuit, the central processing unit is connected with the internal memory, and the central processing unit is further connected with an external flight control computer through a bus.
In order to better implement the scheme, a programmable logic circuit for performing logic processing on the TTL level signal and converting the TTL level signal into a frequency digital quantity in a bus form is further disposed between the rotational speed signal conditioning circuit and the central processing unit.
In order to better implement the scheme, further, the rotating speed signal conditioning circuit is a voltage division circuit, a first-order filter circuit, a second-order filter circuit and a shaping circuit which are connected in sequence.
In order to better realize the scheme, the speed signal conditioning circuit is a voltage dividing resistor R1 and a voltage dividing resistor R2 which are connected to the speed sensor in parallel, respectively, the voltage dividing resistors R1 and R2 are both connected to the non-inverting input terminal of the operational amplifier N1C, the inverting input terminal and the output terminal of the operational amplifier N1C are connected, the output terminal of the operational amplifier N1C is connected to the non-inverting input terminal of the operational amplifier N1D through a resistor R3, the inverting input terminal and the output terminal of the operational amplifier N1D are connected, the output terminal of the operational amplifier N1D is connected to the flip-flop D1A, the output terminal of the operational amplifier N1D is grounded through a resistor R4 which is connected in parallel and a diode V1 which is arranged in an inverting direction, and the output terminal of the flip-flop D1A serves as the output terminal of the speed signal conditioning circuit.
In order to better implement the scheme, a bus sending circuit for converting the signal output by the central processing unit into a bus form is further arranged between the central processing unit and the flight control computer.
In order to better implement the present solution, further, the bus transmission circuit includes a bus protocol chip TL16C754BPN and a driver chip DS26C31 ME/883.
In order to better implement the scheme, further, the central processing unit adopts a TMS320F28335 processor.
The automatic measuring system for the engine running data comprises a rotating speed sensor, a rotating speed signal conditioning circuit, a bus, a flight control computer, a central processing unit and an internal storage, wherein the rotating speed sensor is connected with the central processing unit through the rotating speed signal conditioning circuit, the central processing unit is connected with the internal storage, and the central processing unit is further connected with the flight control computer through the bus. The rotating speed sensor is arranged on an engine of the airplane and used for collecting the rotating speed of the engine of the airplane, then the rotating speed signal conditioning circuit divides, filters and shapes the collected rotating speed signal and sends the signal to the central processing unit for processing, one path of the processed data is sent to the internal memory by the central processing unit, and the other path of the processed data is sent to the flight control computer through the bus for displaying.
In summary, due to the adoption of the technical scheme, the invention has the beneficial effects that:
1. the invention relates to an automatic measuring system for engine running data, which is characterized in that a rotating speed sensor is arranged on an aircraft engine, the rotating speed of the engine is acquired and converted into TTL level signals through a rotating speed signal conditioning circuit, the TTL level signals are sent to a central processing unit for processing and analyzing the rotating speed and the running time of the engine, the central processing unit stores the rotating speed and the running time into a memory and sends data to a flight control computer through a bus for display, and a device for automatically detecting the rotating speed is provided;
2. the invention relates to an automatic measuring system for engine running data, which is characterized in that a rotating speed sensor is arranged on an aircraft engine, the rotating speed sensor is converted into a TTL level signal through a rotating speed signal conditioning circuit after collecting the rotating speed of the engine, then the TTL level signal is sent to a central processing unit for processing and analyzing the rotating speed and the running time of the engine, then the central processing unit stores the rotating speed and the running time into a storage and sends data to a flight control computer through a bus for displaying, and the automatic measuring system for the rotating speed is provided.
Drawings
In order to more clearly illustrate the technical solution, the drawings needed to be used in the embodiments are briefly described below, and it should be understood that, for those skilled in the art, other related drawings can be obtained according to the drawings without creative efforts, wherein:
FIG. 1 is a schematic view of the overall structure of the present invention;
FIG. 2 is a schematic diagram of a rotational speed signal conditioning circuit according to the present invention;
FIG. 3 is a schematic diagram of a bus protocol chip circuit connection of the bus transmitter circuit of the present invention;
fig. 4 is a circuit connection diagram of a driving chip of the bus transmission circuit of the present invention.
Detailed Description
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it should be understood that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments, and therefore should not be considered as a limitation to the scope of protection. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.
In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
The present invention will be described in detail with reference to fig. 1 to 4.
Example 1:
an automatic measuring system for engine operation data, as shown in fig. 1, comprises a rotation speed sensor for sensing the rotation speed of an engine, a rotation speed signal conditioning circuit for converting the rotation speed signal collected by the rotation speed sensor into a TTL level signal, a bus for transmitting operation time data, a central processing unit for analyzing the data, and an internal memory for storing the data;
the rotation speed sensor is connected with the central processing unit through the rotation speed signal conditioning circuit, the central processing unit is connected with the internal memory, and the central processing unit is further connected with an external flight control computer through a bus.
The working principle is as follows: the automatic measuring system for the engine running data comprises a rotating speed sensor, a rotating speed signal conditioning circuit, a bus, a flight control computer, a central processing unit and an internal storage, wherein the rotating speed sensor is connected with the central processing unit through the rotating speed signal conditioning circuit, the central processing unit is connected with the internal storage, and the central processing unit is further connected with the flight control computer through the bus. The rotating speed sensor is arranged on an engine of the airplane and used for collecting the rotating speed of the engine of the airplane, then the rotating speed signal conditioning circuit divides, filters and shapes the collected rotating speed signal and sends the signal to the central processing unit for processing, one path of the processed data is sent to the internal memory by the central processing unit, and the other path of the processed data is sent to the flight control computer through the bus for displaying.
Example 2:
on the basis of embodiment 1, as shown in fig. 1, a programmable logic circuit for performing logic processing on TTL level signals and converting the TTL level signals into frequency digital values in a bus form is further disposed between the rotational speed signal conditioning circuit and the central processing unit. The rotating speed measuring method of the programmable logic circuit is a cycle measuring method: the method is characterized in that a standard high frequency with very high precision is introduced, a rotating speed signal and the standard high frequency are counted simultaneously in the same time, and then the counting ratio of the two frequencies is integrated to calculate the frequency digital quantity of the rotating speed signal.
As shown in fig. 2, the rotation speed signal conditioning circuit is a voltage dividing circuit, a first-order filter circuit, a second-order filter circuit and a shaping circuit, which are connected in sequence. As shown in fig. 2, the speed signal conditioning circuit is a voltage dividing resistor R1 and a voltage dividing resistor R2 which are connected in parallel to the speed sensor, respectively, the voltage dividing resistors R1 and R2 are both connected to the non-inverting input terminal of the operational amplifier N1C, the inverting input terminal and the output terminal of the operational amplifier N1C are connected, the output terminal of the operational amplifier N1C is connected to the non-inverting input terminal of the operational amplifier N1D through a resistor R3, the inverting input terminal and the output terminal of the operational amplifier N1D are connected, the output terminal of the operational amplifier N1D is connected to the flip-flop D1A, the output terminal of the operational amplifier N1D is grounded through a resistor R4 and an inverting diode V1 which are connected in parallel, and the output terminal of the flip-flop D1A serves as the output terminal of the entire speed signal conditioning circuit.
And a bus sending circuit for converting the signal output by the central processing unit into a bus form is arranged between the central processing unit and the flight control computer. The bus transmission circuit comprises a bus protocol chip TL16C754BPN shown in FIG. 3 and a driver chip DS26C31ME/883 shown in FIG. 4.
The central processing unit adopts a TMS320F28335 processor. The bus width is 32 bits, the main frequency 150M, the instruction period of 6.67nS, the 20-bit data bus, the 32-bit address bus and the I/O interface adopt 3.3V for power supply. After receiving the frequency digital quantity of the rotating speed signal, the central processing unit firstly carries out software filtering, and then the rotating speed of the engine is calculated according to the following formula: engine speed (Rpm) = frequency (Hz) × seconds per minute/speed ratio. And the central processing unit judges whether the rotating speed of the engine is more than 500, and accumulates the total operating time of the engine and the operating time of the engine of the current flight task according to every minute when the rotating speed of the engine is more than 500, and stops accumulating until the rotating speed of the engine is less than or equal to 500. The total running time of the engine is accumulated by reading the total running time of the engine recorded in the internal memory at the last time and accumulating the total running time of the engine on the basis; and the engines of the current flight mission are accumulated from zero. In addition, the central processing unit can also upload the running time parameters of the engine to the flight control computer in real time.
The working principle is as follows: in the speed signal conditioning circuit of the present embodiment, the resistors R1 and R2 perform a voltage division function, and the high level of the speed signal after voltage division is 3.3V. The resistor R3, the capacitor C1 and the operational amplifier N1 form a first-order filter circuit. The resistor R4, the diode V1 and the Schmidt trigger D1 form a shaping circuit, the Schmidt trigger D1 has an obvious effect of shaping waveform distortion of signals, and the diode V1 is a voltage stabilizing diode and is used for clamping transient overvoltage. The rotating speed signal conditioning circuit can improve the acquisition precision of the rotating speed signal.
Other parts of this embodiment are the same as those of embodiment 1, and thus are not described again.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention in any way, and all simple modifications and equivalent variations of the above embodiments according to the technical spirit of the present invention are included in the scope of the present invention.
Claims (7)
1. An engine operation data automatic measuring system which is characterized in that: the system comprises a rotating speed sensor for acquiring the rotating speed of an engine, a rotating speed signal conditioning circuit for converting a rotating speed signal acquired by the rotating speed sensor into a TTL level signal, a bus for transmitting operating time data, a central processing unit for analyzing the data and an internal memory for storing the data;
the rotation speed sensor is connected with the central processing unit through the rotation speed signal conditioning circuit, the central processing unit is connected with the internal memory, and the central processing unit is further connected with an external flight control computer through a bus.
2. An engine operation data automatic measuring system according to claim 1, characterized in that: and a programmable logic circuit which is used for carrying out logic processing on the TTL level signal and converting the TTL level signal into a frequency digital quantity in a bus form is also arranged between the rotating speed signal conditioning circuit and the central processing unit.
3. The system for automatically measuring the engine operation data according to claim 1, wherein the rotating speed signal conditioning circuit is a voltage division circuit, a first-order filter circuit, a second-order filter circuit and a shaping circuit which are connected in sequence.
4. An engine operation data automatic measuring system according to claim 3, characterized in that: the rotating speed signal conditioning circuit is a voltage dividing resistor R1 and a voltage dividing resistor R2 which are connected to a rotating speed sensor in parallel respectively, the voltage dividing resistors R1 and R2 are connected to a non-inverting input end of an operational amplifier N1C, an inverting input end and an output end of the operational amplifier N1C are connected, an output end of the operational amplifier N1C is connected with the non-inverting input end of the operational amplifier N1D through a resistor R3, the inverting input end and the output end of the operational amplifier N1D are connected, the output end of the operational amplifier N1D is connected with a trigger D1A, the output end of the operational amplifier N1D is grounded through a resistor R4 and a diode V1 which is arranged in parallel, and the output end of the trigger D1A serves as the output end of the whole rotating speed signal conditioning circuit.
5. An engine operation data automatic measuring system according to claim 1, characterized in that: and a bus sending circuit for converting the signal output by the central processing unit into a bus form is arranged between the central processing unit and the flight control computer.
6. An engine operation data automatic measuring system according to claim 5, characterized in that: the bus transmitting circuit comprises a bus protocol chip TL16C754BPN and a driving chip DS26C31 ME/883.
7. An engine operation data automatic measuring system according to claim 1, characterized in that: the central processing unit adopts a TMS320F28335 processor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110560332.5A CN113202653A (en) | 2021-05-21 | 2021-05-21 | Automatic measuring system for engine running data |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110560332.5A CN113202653A (en) | 2021-05-21 | 2021-05-21 | Automatic measuring system for engine running data |
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| CN113202653A true CN113202653A (en) | 2021-08-03 |
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Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04183953A (en) * | 1990-11-15 | 1992-06-30 | Fuji Heavy Ind Ltd | Engine rotation speed control method |
| JP2010107349A (en) * | 2008-10-30 | 2010-05-13 | Oppama Kogyo Kk | Rotation speed display of engine |
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| CN112696272A (en) * | 2020-12-21 | 2021-04-23 | 苏州长风航空电子有限公司 | Aeroengine rotational speed monitoring limiting circuit |
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-
2021
- 2021-05-21 CN CN202110560332.5A patent/CN113202653A/en active Pending
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Application publication date: 20210803 |