CN108226776A - A kind of small-sized piston formula engine magnetic electric motor signal acquisition circuit - Google Patents
A kind of small-sized piston formula engine magnetic electric motor signal acquisition circuit Download PDFInfo
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- CN108226776A CN108226776A CN201611155374.6A CN201611155374A CN108226776A CN 108226776 A CN108226776 A CN 108226776A CN 201611155374 A CN201611155374 A CN 201611155374A CN 108226776 A CN108226776 A CN 108226776A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/34—Testing dynamo-electric machines
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- General Physics & Mathematics (AREA)
- Measurement Of Length, Angles, Or The Like Using Electric Or Magnetic Means (AREA)
- Measuring Magnetic Variables (AREA)
Abstract
The invention belongs to aircraft engine parameter collection fields.To solve the problems, such as that aviation piston type engine magneto signal amplitude is high, interfering the acquisition precision brought greatly poor, propose a kind of small-sized piston engine magneto signal acquisition circuit, to magneto signal successively into horizontal high voltage attenuation, full-wave rectification, voltage clamp and digital filtering process, magneto signal amplitude and filtering interference signals can be effectively reduced, solve the problems, such as magneto signal acquisition.
Description
Technical field
The invention belongs to aircraft engine parameter collection fields, and in particular to a kind of small-sized piston formula engine magnetic electric motor letter
Number Acquisition Circuit.
Background technology
The ignition system of aviation piston type engine is divided into two class of level ignition system and magneto ignition system.It is wide at present
General application is magneto ignition system.Magneto is made of magnetic circuit, low-voltage circuit, high-tension circuit and starting circuit, by starting
Oscillator generates alternation current voltage, and when postponing circuit breaker disconnection, high voltage induction electricity is generated in left magnetic/right magnetic secondary coil induction
Gesture is sent into each cylinder sparking plug igniting.
Ignition by magneto number is directly proportional to rotating speed, therefore can calculate baby plane hair by acquiring magneto signal frequency
Motivation rotary speed parameter.Magneto signal has the characteristics that amplitude is high, interferes big and AC characteristic, and certain difficulty is brought to acquisition.
The present invention proposes a kind of small-sized piston engine magneto signal acquisition circuit, decayed by high pressure, full-wave rectification, voltage clamp
The methods of position and digital filtering, solve the problems, such as magneto signal acquisition.
Invention content
Goal of the invention：To solve the problems, such as that piston-mode motor magneto signal acquisition is difficult.
Technical solution：A kind of small-sized piston formula engine magnetic electric motor signal acquisition circuit, including high pressure attenuator circuit, all-wave
Rectification circuit, voltage clamping circuit, digital filter circuit；After signal enters high pressure attenuator circuit, magneto signal is decayed to
Hereinafter, attenuated signal enters voltage clamping circuit after full-wave rectification, becoming finally by digital filter circuit can adopt 10V
The voltage signal of collection；Wherein,
High pressure attenuator circuit, including external attenuation and attenuated inside two parts, wherein external attenuation uses adjustable resistance, interior
Portion's damping resistance resistance value is fixed, and external attenuation resistance is connected with attenuated inside resistance.
Full-wave rectifying circuit, in parallel after connecting two-by-two including 4 rectification diodes, the GND1 that wherein diode uses
It needs to be isolated with the ground of GND2.
Digital filter circuit is realized that function includes going metastable state and filter out dry near useful signal by programmable logic
Disturb signal.
Voltage clamping circuit, including Current Limiting Diodes and voltage amplification two parts.
Restricted portion includes resistance R3, R4, R6, diode V5, capacitance C1, C2.Diode V5, resistance R6, diode V6
It is sequentially connected in series with resistance R4, wherein diode V5 is just terminating full-wave rectifying circuit output signal, another termination GND1 of resistance R4, electricity
Resistance R3 one end, capacitance C1 anodes connect the positive and negative both ends of diode V5 respectively, and the resistance R3 other ends, capacitance C1 negative terminals meet GND1, electricity
Hold C2 and be connected in parallel on diode V6 both ends.
Voltage amplifying part includes operational amplifier N, resistance R5, R7, R8 and R9.Resistance R5 both ends connect diode respectively
V6 negative terminals and operational amplifier N input negative terminals, resistance R7 both ends are connecting diode V6 anodes and operational amplifier N inputs just respectively
End, resistance R8 both ends connect operational amplifier input negative terminal and its output terminal respectively, and resistance R9 both ends connect operation amplifier respectively
Device input positive terminal and GND1.
The invention also provides a kind of small-sized piston formula engine magnetic electric motor signal acquisition method, signal passes sequentially through high pressure
Attenuator circuit, full-wave rectifying circuit, voltage clamping circuit, digital filter circuit, are as follows：
Step 1；High pressure attenuator circuit：As shown in Figure 1, decayed using inside and outside two-stage, attenuated inside resistance R1,
R2 values are fixed, and external attenuation resistance RW values are adjustable.According to the maximum voltage value of different model magneto signal, external attenuation is adjusted
The value of resistance RW, so that voltage signal R_signal values are maintained at an internal Acquisition Circuit and can connect after non-essential resistance RW attenuation
By in the range of；
Step 2；Full-wave rectifying circuit：As shown in Figure 1, the power supply that full-wave rectifying circuit uses for AGND, AGND is corresponded to
Power supply power supply corresponding with magneto signal GND is isolation；
Step 3；Voltage clamping circuit：As shown in Figure 1, voltage clamping circuit is divided into current limliting and amplification two parts, through all-wave
Rectified signal is filtered, and voltage magnitude is clamped to the both ends pressure drop during conducting of diode PN junction with after diode clamp,
For follow-up signal processing, which is amplified to the amplitude of Transistor-Transistor Logic level through level-one amplifying circuit；
Step 4；Digital filter circuit：To prevent prime signal from being interfered to late-class circuit, voltage passes through after clamp
Enter programmable logic chip after photoelectric coupler isolation.In programmable logic chip, to prevent metastable state, signal is first
After two-stage trigger synchronizes, subsequently into digital filter circuit, the dry of the neighbouring specific time of magneto useful signal is filtered out
Disturb signal.
The technique effect of the present invention：It solves the features such as magneto signal amplitude is high, interference is big and AC characteristic acquisition is tired
The problem of difficult, the rotating speed and actual speed error that collected magneto signal calculates are small, and precision is high；This method directly acquires
Engine own signal does not need to newly-increased speed probe, reduces design complexities and cost.
Description of the drawings
Fig. 1 is magneto signal acquisition circuit figure.
Specific embodiment
Specific embodiment is as follows：
(1) high pressure attenuator circuit；External attenuation resistance selects 74k Ω resistance values, and attenuated inside resistance R1, R2 select 3k respectively
Ω and 8k Ω resistance values, maximum voltage value is about ± 8V or so after attenuation；
(2) full-wave rectifying circuit：BAS32 diodes are selected, after full-wave rectification, below 0V voltages are reversed positive electricity
Pressure, i.e., after full-wave rectification output signal voltage value 0 between 8V；
(3) voltage clamping circuit：C1, C2 select 1nF magnetic medium capacitances, and R3, R4, R6 select 1k Ω valued resistors, R5, R7
10k Ω valued resistor diodes V5, V6 is selected to select BAS32, amplifier selects AD8606, after voltage clamping circuit, output letter
Number voltage value is 3.3V or so；
(4) digital filter circuit：Digital filter circuit selects CPLD chip XC95288, voltage clamping circuit output signal
Into after chip, first pass through after two-stage trigger synchronizes, then using counter to the interference in the 5ns times near first rising edge
Signal is filtered out, and frequency is calculated using the acquisition of dsp chip TMS320C2812EVA partial functions through digital filter circuit signal；
Through being surveyed on certain type piston-mode motor engine, calculated by the collected magneto signal of this method
Rotating speed is less than 10r/m with actual speed error, works well.
Claims (4)
1. a kind of small-sized piston formula engine magnetic electric motor signal acquisition circuit, it is characterised in that：Including high pressure attenuator circuit, all-wave
Rectification circuit, voltage clamping circuit, digital filter circuit；Magneto signal enters high pressure attenuator circuit and carries out amplitude attenuation, declines
Subtract rear signal and enter voltage clamping circuit after full-wave rectification, finally by inputting Digital Signal Processing after digital filter circuit
Device is acquired；
The high pressure attenuator circuit includes external attenuation and attenuated inside two parts, and wherein external attenuation uses adjustable resistance, interior
Portion's damping resistance resistance value is fixed, and external attenuation resistance is connected with attenuated inside resistance；
The full-wave rectifying circuit, in parallel after connecting two-by-two including 4 rectification diodes, the GND1 that wherein diode uses
It needs to be isolated with the ground of GND2；
The voltage clamping circuit, including restricted portion and voltage amplification two parts；
The digital filter circuit, is realized by programmable logic, and function includes going metastable state and filter out dry near useful signal
Disturb signal.
A kind of 2. small-sized piston formula engine magnetic electric motor signal acquisition circuit according to claim 1, which is characterized in that institute
It states restricted portion and includes resistance R3, R4, R6, diode V5, capacitance C1, C2；Diode V5, resistance R6, diode V6 and resistance
R4 is sequentially connected in series, and wherein diode V5 is just terminating full-wave rectifying circuit output signal, resistance R4 another termination GND1, resistance R3 mono-
End, capacitance C1 anodes connect the positive and negative both ends of diode V5 respectively, and the resistance R3 other ends, capacitance C1 negative terminals meet GND1, and capacitance C2 is simultaneously
It is associated in diode V6 both ends.
A kind of 3. small-sized piston formula engine magnetic electric motor signal acquisition circuit according to claim 1, which is characterized in that institute
It states voltage amplifying part and includes operational amplifier N, resistance R5, R7, R8 and R9；Resistance R5 both ends connect diode V6 negative terminals respectively
With operational amplifier N input negative terminals, resistance R7 both ends connect diode V6 anodes and operational amplifier N input positive terminals respectively, electricity
Resistance R8 both ends connect operational amplifier input negative terminal and its output terminal respectively, and resistance R9 both ends connect operational amplifier input respectively
Anode and GND1.
4. a kind of small-sized piston formula engine magnetic electric motor signal acquisition method, it is whole that signal passes sequentially through high pressure attenuator circuit, all-wave
Current circuit, voltage clamping circuit, digital filter circuit, are as follows：
Step 1；High pressure attenuator circuit：Decayed using inside and outside two-stage, attenuated inside resistance R1, R2 value is fixed, and outside is declined
Reduced resistance RW values are adjustable；According to the maximum voltage value of different model magneto signal, the value of external attenuation resistance RW is adjusted, so that
Voltage signal R_signal values are maintained in an acceptable range of internal Acquisition Circuit after non-essential resistance RW attenuation；
Step 2；Full-wave rectifying circuit：Believe for AGND, AGND corresponding powers and magneto to the power supply that full-wave rectifying circuit uses
Number corresponding power supplys of GND are isolation；
Step 3；Voltage clamping circuit：Voltage clamping circuit is divided into current limliting and amplification two parts, and signal passes through after full-wave rectification
After filtering and diode clamp, voltage magnitude is clamped to the both ends pressure drop during conducting of diode PN junction, is handled for follow-up signal,
The signal is amplified to the amplitude of Transistor-Transistor Logic level through level-one amplifying circuit；
Step 4；Digital filter circuit：To prevent prime signal from being interfered to late-class circuit, voltage passes through photoelectricity after clamp
Enter programmable logic chip after coupler isolation；In programmable logic chip, to prevent metastable state, signal first passes through
After two-stage trigger synchronizes, subsequently into digital filter circuit, the interference letter of specific time near magneto useful signal is filtered out
Number.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611155374.6A CN108226776B (en) | 2016-12-14 | 2016-12-14 | Small piston engine magneto signal acquisition circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611155374.6A CN108226776B (en) | 2016-12-14 | 2016-12-14 | Small piston engine magneto signal acquisition circuit |
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| Publication Number | Publication Date |
|---|---|
| CN108226776A true CN108226776A (en) | 2018-06-29 |
| CN108226776B CN108226776B (en) | 2021-07-16 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201611155374.6A Active CN108226776B (en) | 2016-12-14 | 2016-12-14 | Small piston engine magneto signal acquisition circuit |
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| CN2586821Y (en) * | 2002-11-15 | 2003-11-19 | 陈万兴 | Motorcycle throttle electric starting controller |
| CN1748924A (en) * | 2005-01-08 | 2006-03-22 | 湘潭大学 | Automatic tracking control method for submerged-arc welding seam |
| CN201075665Y (en) * | 2007-07-13 | 2008-06-18 | 合肥英特电力设备有限公司 | Protection test control apparatus having functions of alternating-current/direct-current general use and checking the same term |
| CN102468795A (en) * | 2010-11-10 | 2012-05-23 | 南京南瑞继保电气有限公司 | Method for detecting rotor static position of synchronous motor |
| CN102621345A (en) * | 2012-04-10 | 2012-08-01 | 西北工业大学 | Detection method and device of rotation speed of generator |
| CN202374213U (en) * | 2011-08-23 | 2012-08-08 | 山东美邦电子科技有限公司 | Improved permanent magnet motor controller of electric walking-assistant vehicle |
| CN104330583A (en) * | 2014-10-28 | 2015-02-04 | 陕西千山航空电子有限责任公司 | Aircraft engine rotating speed signal acquisition circuit |
| CN105841867A (en) * | 2016-05-20 | 2016-08-10 | 广东工业大学 | Measuring method for tooth groove torque of permanent magnet motor |
-
2016
- 2016-12-14 CN CN201611155374.6A patent/CN108226776B/en active Active
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06350450A (en) * | 1993-06-10 | 1994-12-22 | Nippondenso Co Ltd | Data collection device with a/d converter |
| CN2438836Y (en) * | 2000-08-21 | 2001-07-11 | 王希桓 | Fuel-feeding & ignition controller of engine for motorcycle |
| CN2586821Y (en) * | 2002-11-15 | 2003-11-19 | 陈万兴 | Motorcycle throttle electric starting controller |
| CN1748924A (en) * | 2005-01-08 | 2006-03-22 | 湘潭大学 | Automatic tracking control method for submerged-arc welding seam |
| CN201075665Y (en) * | 2007-07-13 | 2008-06-18 | 合肥英特电力设备有限公司 | Protection test control apparatus having functions of alternating-current/direct-current general use and checking the same term |
| CN102468795A (en) * | 2010-11-10 | 2012-05-23 | 南京南瑞继保电气有限公司 | Method for detecting rotor static position of synchronous motor |
| CN202374213U (en) * | 2011-08-23 | 2012-08-08 | 山东美邦电子科技有限公司 | Improved permanent magnet motor controller of electric walking-assistant vehicle |
| CN102621345A (en) * | 2012-04-10 | 2012-08-01 | 西北工业大学 | Detection method and device of rotation speed of generator |
| CN104330583A (en) * | 2014-10-28 | 2015-02-04 | 陕西千山航空电子有限责任公司 | Aircraft engine rotating speed signal acquisition circuit |
| CN105841867A (en) * | 2016-05-20 | 2016-08-10 | 广东工业大学 | Measuring method for tooth groove torque of permanent magnet motor |
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| CN108226776B (en) | 2021-07-16 |
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Inventor after: Jing Desheng Inventor after: Gou Limin Inventor after: Gao Hao Inventor after: Jiang Xiegang Inventor after: Han Liang Inventor after: Kuang Wen Cong Inventor before: Jing Desheng Inventor before: Gou Limin Inventor before: Gao Hao Inventor before: Jiang Xiegang Inventor before: Han Liang Inventor before: Kuang Wen Cong |
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