CN202119786U - System for measuring rotating speed of aviation gasoline engine - Google Patents
System for measuring rotating speed of aviation gasoline engine Download PDFInfo
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- CN202119786U CN202119786U CN2011202182913U CN201120218291U CN202119786U CN 202119786 U CN202119786 U CN 202119786U CN 2011202182913 U CN2011202182913 U CN 2011202182913U CN 201120218291 U CN201120218291 U CN 201120218291U CN 202119786 U CN202119786 U CN 202119786U
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Abstract
The utility model relates to a system for measuring rotating speed of an aviation gasoline engine which takes an igniting generator of an engine as a signal source and comprises a burr filtering unit, a current amplitude limiting unit, a signal isolation unit and a signal inversion unit, wherein an input end of the burr filtering unit is connected with the igniting generator of the engine, an output end of the burr filtering unit is connected with an input end of the current amplitude limiting unit, an output end of the burr filtering unit is connected with an input end of the signal isolation unit, an output end of the signal isolation unit is connected with an input end of the signal inversion unit, and an output end of the signal inversion unit is connected with a rotating speed controller of the engine. With no sensitive device arranged on a rotating part of the engine, ignition pulses of the igniting generator of the engine are used to calculate the rotating speed of the generator. Speed measuring is not influenced by illumination, strong magnetic fields or strong electric fields. Principle is simple and reliable.
Description
Technical field
The utility model relates to Motronic control maps control technology field, specifically is a kind of aviation gasoline measurement of engine rotate speed system.
Background technology
The small-sized aviation gasoline machine that unmanned plane uses, in light weight, simple in structure.In use, the operator needs the rotating speed of monitoring engine or the rotating speed of controlling engine in certain scope.Just need measure the rotating speed of engine through direct or indirect mode.The Traditional engine tachometric survey often need embed magnetic bead on rotatable parts, perhaps realize through external photoelectric encoder on rotation axis.Embedding magnetic bead influence the transient equilibrium of rotary part, can not keep constant because Plane of rotation embeds the distance of magnetic bead with the distance of Hall element simultaneously, and magnetic signal intensity maybe deficiency in the measuring process, causes measurement inaccurate or can't normally accomplish measurement.Some special part can't embed magnetic material in addition.Photoelectric encoder need be installed on the engine output shaft, and installation workload is big, and measuring element damages easily under high rotating speed.In addition, the sensor of photoelectric encoder receives the dust in the atmosphere, the pollutions such as lubricating oil of engine easily, cause probe to be blocked and cause measure inaccurate.Its functional reliability under rugged surroundings is not high, receives the influence at sunshine out of doors easily.
The utility model content
The utility model is to the deficiency of above-mentioned existing measuring technique, and purpose is to provide a kind of aviation gasoline measurement of engine rotate speed system.In order to reach, realize the purpose of tachometric survey not through directly measuring the rotation of engine output shaft.Adopt electronic sensor, through measuring the output voltage that engine carries spark generator, indirect measurement engine speed.Under the noncontact situation, measure engine speed reliably in this way.
For realizing that the technical scheme that above-mentioned purpose the utility model adopts is: a kind of aviation gasoline measurement of engine rotate speed system; Spark generator with engine is a signal source, and this system comprises burr filter element, current limit unit, Signal Spacing unit and signal roll-over unit; The input end of said burr filter element is connected with the spark generator of engine, and the output terminal of burr filter element is connected with the current limit unit; Said current limit unit input end is connected with the burr filter element, and current limit unit output terminal is connected with the Signal Spacing unit; Said Signal Spacing unit input end is connected with the current limit unit, and Signal Spacing unit output terminal is connected with the signal roll-over unit; Said signal roll-over unit input end is connected with the Signal Spacing unit, and signal roll-over unit output terminal is connected with motor speed controller.
Said burr filter element comprises voltage comparison module, and the input end of said voltage comparison module is connected with the spark generator of generator, and output terminal is connected with the current limit unit through triode Q1, triode Q2.
Said voltage comparison module is made up of resistance R 3, diode D1, resistance R 7, resistance R 4 and resistance R 5, and wherein resistance R 3 is connected with diode D1, between resistance R 3 and diode D1, is provided with the D node; Resistance R 7 is connected with resistance R 4, between resistance R 7 and resistance R 4, is provided with the C node, is connected to resistance R 5 between diode D1 and the resistance R 4; Said C node is connected with triode Q1, and the D node is connected with triode Q2.
The spark generator of the A of said burr filter element, B input end and engine connects, and when the voltage between input end A, B during less than 15V, the C node voltage is lower than 15V; Diode D1 is not reversed puncture, D node and input end A equipotential; Because the C node voltage is the result of resistance R 7 and resistance R 4 dividing potential drops, its voltage is lower than the A node voltage, and promptly the C node voltage is lower than the D node, triode Q1, not conducting of triode Q2, and the burr signal that is lower than 15V is filtered; When the voltage between A, B input end during at 15V-48V, diode D1 is reversed puncture, and D node voltage clamper is at 15V; The C node voltage is the result of resistance R 7 and resistance R 4 dividing potential drops, and in the 15-48V input voltage range, C node maximum voltage is 15V, and promptly the C node voltage is lower than the D node, triode Q1, not conducting of triode Q2, and the spark generator burr signal that is lower than 48V is filtered; When the voltage between input end A, B during at 48-216V; Diode D1 is reversed puncture, and D node voltage clamper is at 15V, and the C node voltage is the result of R7 and R4 dividing potential drop; C node minimum voltage is 15V; Be that the C node voltage is higher than the D node, triode Q1, triode Q2 conducting, the spark generator ignition signal that is higher than 48V is converted into useful rotating speed count signal.
Said current limit unit adopts 3 watts of amplitude limit resistance R 1, through the electric current of amplitude limit resistance R 1 restricted passage photoelectrical coupler U1, guarantees the operate as normal of Signal Spacing unit.
Said Signal Spacing unit adopts photoelectrical coupler, and the high-voltage signal of spark generator and the low pressure tach signal of output are isolated through the mode of photoelectricity.
Said signal roll-over unit can use rotational speed governor through the high-low level upset of photoelectrical coupler with signal normally.
The utility model has the advantages that:
1. the utility model is a signal source with the ignition pulse voltage of petrolic spark generator, and this pulse voltage signal is shaped as the 5V square-wave pulse signal, supplies motor speed controller to use.
2. the utility model need not on the engine rotation parts, Sensitive Apparatus to be installed, and only comes the current rotating speed of calculation engine through the firing pulse of petrolic spark generator.Testing the speed does not receive the influence of illumination, high-intensity magnetic field, highfield, and measuring principle is simple, reliable.
3. the utility model is can the MEASUREMENT OF STEAM oil turbine range of speeds wide, can measure engine speed range between 650rpm-14000rpm, satisfies the requirement of engine speed control.
Description of drawings
Fig. 1 is the one-piece construction figure of the utility model;
Fig. 2 is the circuit theory diagrams of the utility model.
Embodiment
A kind of aviation gasoline measurement of engine rotate speed system is like Fig. 1, shown in 2.Spark generator with engine is a signal source, and this system comprises burr filter element 2, current limit unit 3, Signal Spacing unit 4 and signal roll-over unit 5.
The input end of said burr filter element 2 is connected with the spark generator of generator, and the output terminal of burr filter element 2 is connected with current limit unit 3; Said current limit unit 3 input ends are connected with burr filter element 2, and current limit unit 3 output terminals are connected with Signal Spacing unit 4; Said Signal Spacing unit 4 input ends are connected with current limit unit 3, and Signal Spacing unit 4 output terminals are connected with signal roll-over unit 5; Said signal roll-over unit 5 input ends are connected with Signal Spacing unit 4, and signal roll-over unit 5 output terminals are connected with motor speed controller (like Futaba GV-1).Said burr filter element 2 comprises voltage comparison module 1, and the input end of said voltage comparison module 1 is connected with the spark generator of generator, and output terminal is connected with the current limit unit through triode Q1, triode Q2.Said voltage comparison module 1 is made up of resistance R 3, diode D1, resistance R 7, resistance R 4 and resistance R 5, and wherein resistance R 3 is connected with diode D1, between resistance R 3 and diode D1, is provided with the D node; Resistance R 7 is connected with resistance R 4, between resistance R 7 and resistance R 4, is provided with the C node, is connected to resistance R 5 between diode D1 and the resistance R 4; Said C node is connected with triode Q1, and the D node is connected with triode Q2.The spark generator of the A of said burr filter element 2, B input end and engine connects, and when the voltage between input end A, B during less than 15V, the C node voltage is lower than 15V; Diode D1 is not reversed puncture, D node and input end A equipotential; Because the C node voltage is the result of resistance R 7 and resistance R 4 dividing potential drops, its voltage is lower than the A node voltage, and promptly the C node voltage is lower than the D node, triode Q1, not conducting of triode Q2, and the burr signal that is lower than 15V is filtered; When the voltage between A, B input end during at 15V-48V, diode D1 is reversed puncture, and D node voltage clamper is at 15V; The C node voltage is the result of resistance R 7 and resistance R 4 dividing potential drops, and in the 15-48V input voltage range, C node maximum voltage is 15V, and promptly the C node voltage is lower than the D node, triode Q1, not conducting of triode Q2, and the spark generator burr signal that is lower than 48V is filtered; When the voltage between input end A, B during at 48-216V; Diode D1 is reversed puncture, and D node voltage clamper is at 15V, and the C node voltage is the result of R7 and R4 dividing potential drop; C node minimum voltage is 15V; Be that the C node voltage is higher than the D node, triode Q1, triode Q2 conducting, the spark generator ignition signal that is higher than 48V is converted into useful rotating speed count signal.Said current limit unit 3 adopts 3 watts of amplitude limit resistance R 1, through the electric current of amplitude limit resistance R 1 restricted passage photoelectrical coupler U1, guarantees the operate as normal of Signal Spacing unit 4.Said Signal Spacing unit 4 adopts photoelectrical coupler, and the high-voltage signal of spark generator and the low pressure tach signal of output are isolated through the mode of photoelectricity.Said signal roll-over unit 5 can use rotational speed governor through the high-low level upset of photoelectrical coupler U2 with signal normally.This system can the MEASUREMENT OF STEAM oil turbine range of speeds between 650rpm-14000rpm.
The spark generator of engine changed between the voltage 60-216V of each firing pulse in high voltage package man-hour.Ignition voltage is when engine speed 400rpm-14000rpm, along with rotating speed raises and raises.When engine speed arrived 6500rpm, output voltage is constant no longer to raise at 216V.But in the electric fiery signal of output, also produce an igniting burr signal that raises with rotating speed at spark generator, this signal amplitude peak is 40V.This burr signal will have influence on tachometric survey.Therefore need burr filter element 2.
Claims (7)
1. aviation gasoline measurement of engine rotate speed system is a signal source with the spark generator of engine, and it is characterized in that: this system comprises burr filter element, current limit unit, Signal Spacing unit and signal roll-over unit;
The input end of said burr filter element is connected with the spark generator of generator, and the output terminal of burr filter element is connected with the current limit unit;
Said current limit unit input end is connected with the burr filter element, and current limit unit output terminal is connected with the Signal Spacing unit;
Said Signal Spacing unit input end is connected with the current limit unit, and Signal Spacing unit output terminal is connected with the signal roll-over unit;
Said signal roll-over unit input end is connected with the Signal Spacing unit, and signal roll-over unit output terminal is connected with motor speed controller.
2. a kind of aviation gasoline measurement of engine rotate speed according to claim 1 system; It is characterized in that: said burr filter element comprises voltage comparison module; The input end of said voltage comparison module is connected with the spark generator of generator, and output terminal is connected with the current limit unit through triode Q1, triode Q2.
3. a kind of aviation gasoline measurement of engine rotate speed according to claim 2 system; It is characterized in that: said voltage comparison module is made up of resistance R 3, diode D1, resistance R 7, resistance R 4 and resistance R 5; Wherein resistance R 3 is connected with diode D1, between resistance R 3 and diode D1, is provided with the D node; Resistance R 7 is connected with resistance R 4, between resistance R 7 and resistance R 4, is provided with the C node, is connected to resistance R 5 between diode D1 and the resistance R 4; Said C node is connected with triode Q1, and the D node is connected with triode Q2.
4. a kind of aviation gasoline measurement of engine rotate speed according to claim 1 system; It is characterized in that: the spark generator of the A of said burr filter element, B input end and engine connects; When the voltage between input end A, B during less than 15V, the C node voltage is lower than 15V; Diode D1 is not reversed puncture, D node and input end A equipotential; Because the C node voltage is the result of resistance R 7 and resistance R 4 dividing potential drops, its voltage is lower than the A node voltage, and promptly the C node voltage is lower than the D node, triode Q1, not conducting of triode Q2, and the burr signal that is lower than 15V is filtered;
When the voltage between A, B input end during at 15V-48V, diode D1 is reversed puncture, and D node voltage clamper is at 15V; The C node voltage is the result of resistance R 7 and resistance R 4 dividing potential drops, and in the 15-48V input voltage range, C node maximum voltage is 15V, and promptly the C node voltage is lower than the D node, triode Q1, not conducting of triode Q2, and the spark generator burr signal that is lower than 48V is filtered;
When the voltage between input end A, B during at 48-216V; Diode D1 is reversed puncture, and D node voltage clamper is at 15V, and the C node voltage is the result of R7 and R4 dividing potential drop; C node minimum voltage is 15V; Be that the C node voltage is higher than the D node, triode Q1, triode Q2 conducting, the spark generator ignition signal that is higher than 48V is converted into useful rotating speed count signal.
5. a kind of aviation gasoline measurement of engine rotate speed according to claim 1 system; It is characterized in that: said current limit unit adopts amplitude limit resistance R 1; Through the electric current of amplitude limit resistance R 1 restricted passage photoelectrical coupler U1, guarantee the operate as normal of Signal Spacing unit.
6. a kind of aviation gasoline measurement of engine rotate speed according to claim 1 system, it is characterized in that: said Signal Spacing unit adopts photoelectrical coupler, and the high-voltage signal of spark generator and the low pressure tach signal of output are isolated through the mode of photoelectricity.
7. a kind of aviation gasoline measurement of engine rotate speed according to claim 1 system, it is characterized in that: said signal roll-over unit can use rotational speed governor through the high-low level upset of photoelectrical coupler with signal normally.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011202182913U CN202119786U (en) | 2011-06-24 | 2011-06-24 | System for measuring rotating speed of aviation gasoline engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011202182913U CN202119786U (en) | 2011-06-24 | 2011-06-24 | System for measuring rotating speed of aviation gasoline engine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202119786U true CN202119786U (en) | 2012-01-18 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011202182913U Expired - Lifetime CN202119786U (en) | 2011-06-24 | 2011-06-24 | System for measuring rotating speed of aviation gasoline engine |
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| Country | Link |
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| CN (1) | CN202119786U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102841215A (en) * | 2011-06-24 | 2012-12-26 | 中国科学院沈阳自动化研究所 | System for measuring rotation speed of aviation gasoline engine |
| CN107219375A (en) * | 2017-05-27 | 2017-09-29 | 四川新川航空仪器有限责任公司 | It is a kind of to realize the method measured during tach signal high-precision real |
-
2011
- 2011-06-24 CN CN2011202182913U patent/CN202119786U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102841215A (en) * | 2011-06-24 | 2012-12-26 | 中国科学院沈阳自动化研究所 | System for measuring rotation speed of aviation gasoline engine |
| CN107219375A (en) * | 2017-05-27 | 2017-09-29 | 四川新川航空仪器有限责任公司 | It is a kind of to realize the method measured during tach signal high-precision real |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20120118 Effective date of abandoning: 20140507 |
|
| AV01 | Patent right actively abandoned |
Granted publication date: 20120118 Effective date of abandoning: 20140507 |
|
| RGAV | Abandon patent right to avoid regrant |