CN104849053A - Engine measurement and control system based on second-order low-pass filter circuit - Google Patents
Engine measurement and control system based on second-order low-pass filter circuit Download PDFInfo
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- CN104849053A CN104849053A CN201510257568.6A CN201510257568A CN104849053A CN 104849053 A CN104849053 A CN 104849053A CN 201510257568 A CN201510257568 A CN 201510257568A CN 104849053 A CN104849053 A CN 104849053A
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Abstract
The invention discloses an engine measurement and control system based on a second-order low-pass filter circuit. The engine measurement and control system is composed of a tested engine (1), a sensor system (3) and a servo motor (2) which are connected with the tested engine (1), a servo motor control system (4) which is connected with the servo motor (2), a test stand PC (6) which is connected with the servo motor control system (4), and a background server (7) which is connected with the test stand PC (6). The engine measurement and control system is characterized in that the second-order low-pass filter circuit (5) is also arranged between the sensor system (3) and the test stand PC (6). Interference signals of the system can be filtered by the effect of the second-order low-pass filter circuit so that all the parameter signals of the tested engine are enabled to be more accurate.
Description
Technical field
The present invention relates to a kind of engine TT&C system, specifically refer to a kind of engine TT&C system based on second-order low-pass filter circuit.
Background technology
People improve constantly the reliability of automobile, the requirement of the aspect such as security and green, and engine is as the heart component of automobile, its technical merit directly has influence on the performance index such as its dynamic property, economy and discharge, and the frequency of engine breakdown is also the highest.Engine performance measuring is the Main Means judging condition of the engine quality, and be also the important content of automotive check and maintenance job, therefore engine performance measuring is more and more subject to people's attention.As the detection system of test engine performance, engine TT&C system then seems that by for important, it is detection system indispensable on car engine machine production line.But, traditional engine TT&C system its cannot well process the every engine signal collected, thus cause system to engine various performance parameters test inaccurate, affect the outgoing of engine.Therefore, a kind of high-precision engine control system is provided to be then the current task of top priority.
Summary of the invention
It tests inaccurate defect to engine parameter to the object of the invention is to overcome traditional engine TT&C system, provides a kind of engine TT&C system based on second-order low-pass filter circuit.
Object of the present invention is achieved through the following technical solutions: a kind of engine TT&C system based on second-order low-pass filter circuit, it comprises tested engine, the sensing system be connected with tested engine and servomotor, the servo control system be connected with servomotor, the test board PC be connected with servo control system, and the background server to be connected with test board PC, between sensing system and test board PC, be also provided with second-order low-pass filter circuit.
Further, described second-order low-pass filter electricity routing amplifier P1, amplifier P2, unidirectional thyristor D8, one end is connected with the positive pole of amplifier P1, the resistance R11 of other end ground connection, one end is connected with the negative pole of amplifier P1, the other end then after resistance R10 as the resistance R12 of the input end of this second-order low-pass filter circuit, N pole is connected with the N pole of unidirectional thyristor D8, the diode D7 that P pole is then connected with the P pole of unidirectional thyristor D8 after polar capacitor C4, one end is connected with the control pole of unidirectional thyristor D8, the resistance R13 that the other end is then connected with the output terminal of amplifier P1, and positive pole is connected with the negative pole of amplifier P2, the polar capacitor C5 that negative pole is then connected with the positive pole of amplifier P1 forms, the P pole of described unidirectional thyristor D8 is connected with the tie point of resistance R12 with resistance R10, its N pole is then connected with the output terminal of amplifier P1, as the output terminal of this second-order low-pass filter circuit while the negative pole of described amplifier P2 is connected with the output terminal of amplifier P1, its positive pole is then connected with its output terminal, its output terminal is then connected with the output terminal of amplifier P1.
Described servo control system is then by symmetrical expression field effect transistor driving circuit, and the trigger circuit be connected with symmetrical expression field effect transistor driving circuit form.Described symmetrical expression field effect transistor driving circuit is then by the first driving circuit, and the second driving circuit be connected with the first driving circuit forms.
Described first driving circuit is by triode VT1, field effect transistor Q1, field effect transistor Q2, one end is connected with the grid of field effect transistor Q2, the other end is then as the resistance R3 of the input end of this first driving circuit, the diode D1 be in parallel with resistance R3, one end is connected with the base stage of triode VT1, the resistance R1 that the other end is then connected with the P pole of diode D1, N pole is connected with the collector of triode VT1, the diode D2 of ground connection while P pole is then connected with the drain electrode of field effect transistor Q2, P pole is connected with the second driving circuit, the diode D3 that N pole is then connected with the collector of triode VT1 after resistance R2, and positive pole is connected with the N pole of diode D3, the polar capacitor C1 that negative pole is then connected with the P pole of diode D2 forms, the P pole of described diode D1 is extremely all connected with trigger circuit with N, grounded emitter, its collector of described triode VT1 are then connected with the grid of field effect transistor Q1, the drain electrode of described field effect transistor Q1 is connected with the N pole of diode D3, its source electrode is then connected with the drain electrode of field effect transistor Q2, the source electrode of described field effect transistor Q2 is then connected with the second driving circuit and trigger circuit respectively.
The second described driving circuit is by field effect transistor Q3, field effect transistor Q4, triode VT5, one end is connected with the grid of field effect transistor Q4, the other end is then as the resistance R8 of the output terminal of this second driving circuit, the diode D6 be in parallel with resistance R8, one end is connected with the base stage of triode VT5, the resistance R9 that the other end is then connected with the P pole of diode D6, N pole is connected with the collector of triode VT5, the diode D5 of ground connection while P pole is then connected with the drain electrode of field effect transistor Q4, P pole is connected with the P pole of diode D3, the diode D4 that N pole is then connected with the collector of triode VT5 after resistance R7, and positive pole is connected with the N pole of diode D4, the polar capacitor C3 that negative pole is then connected with the P pole of diode D5 forms, the P pole of described diode D6 is also connected with trigger circuit, grounded emitter, its collector of triode VT5 are then connected with the grid of field effect transistor Q3, the drain electrode of described field effect transistor Q3 is connected with the N pole of diode D4, its source electrode is then connected with the drain electrode of field effect transistor Q4, the source electrode of described field effect transistor Q4 is then connected with the source electrode of field effect transistor Q2.
Described trigger circuit are by triode VT2, triode VT3, flip chip U, the resistance R4 be in parallel with diode D1, the resistance R5 that one end is connected with the P pole of diode D1, the other end is then connected with the base stage of triode VT2, the resistance R6 of ground connection while one end is connected with the source electrode of field effect transistor Q2, the other end is then connected with the RESET pin of flip chip U, and the polar capacitor C2 that negative pole is connected with the emitter of triode VT3, positive pole is then connected with the base stage of triode VT4 forms; Grounded emitter, its collector of described triode VT2 are then connected with the N pole of diode D1; The base stage of described triode VT3 is connected with the collector of triode VT2, its collector is then connected with the collector of triode VT4; The grounded emitter of described triode VT4, its collector are then connected with the CLK pin of flip chip U and DATA pin respectively; The SET pin of described flip chip U is connected with its RESET pin, its Q2 pin is then connected with the P pole of diode D6.
Described flip chip U is CD4013 integrated circuit, and field effect transistor Q1, field effect transistor Q2, field effect transistor Q3 and field effect transistor Q4 are enhancement mode PNP field effect transistor.
The present invention comparatively prior art compares, and has the following advantages and beneficial effect:
(1) the present invention uses servomotor to drag tested engine rotation, does not burn, when not doing work, using sensor to gather related data and analyze, assessing engine performance by calculating various engine parameter at engine.
(2) the present invention does not need the resource such as fuel consumption, chilled water, saves the cost in engine testing process.
(3) the present invention is without the need to combustion process, therefore energy-saving and environmental protection more.
(4) the present invention is by the effect of second-order low-pass filter circuit, can filter out the undesired signal of system, make the parameters signal of tested engine more accurate.
Accompanying drawing explanation
Fig. 1 is one-piece construction schematic diagram of the present invention;
Fig. 2 is servo control system electrical block diagram of the present invention;
Fig. 3 is second-order low-pass filter electrical block diagram of the present invention.
Reference numeral name in above accompanying drawing is called:
1-tested engine, 2-servomotor, 3-sensing system, 4-servo control system, 5-second-order low-pass filter circuit, 6-test board PC, 7-background server.
Embodiment
Below in conjunction with embodiment, the present invention is described in further detail, but embodiments of the present invention are not limited to this.
Embodiment
As shown in Figure 1, the present invention includes tested engine 1, the sensing system 3 be connected with tested engine 1 and servomotor 2, the servo control system 4 be connected with servomotor 2, the test board PC6 be connected with servo control system 4, the background server 7 be connected with test board PC6, in order to reach object of the present invention, the present invention is also provided with second-order low-pass filter circuit 5 between sensing system 3 and test board PC6.
Wherein, sensing system 3 is made up of multiple sensor, and the present embodiment preferentially adopts torque sensor, temperature sensor and vibration transducer to realize, and it is for gathering moment of torsion, the signal such as temperature and vibration of tested engine 1.Various signals when 5, second-order low-pass filter circuit is for working to tested engine 1 carry out filtering process.Servomotor 2 works for driving tested engine 1, and by adjusting the rotating speed of servomotor 2, the present invention can test the various data of tested engine 1 under different rotating speeds.Test board PC6 is as man-machine conversation window of the present invention, tester can send instruction to servo control system 4 on test board PC6, controlled by the rotating speed of servo control system 4 pairs of servomotors 2, simultaneously, test board PC6 can also receive the various parameters of tested engine 1, and sends to background server 7.Background server 7 stores all standard parameter of tested engine 1, its real-time parameter by the tested engine 1 of contrast and canonical parameter, thus judges that whether the properties of tested engine 1 is up to standard.
Background server 7 adopts existing computing machine, and test board PC6 then adopts existing single-chip microcomputer, and servomotor 2, sensing system 3 all adopt existing technology to realize.Second-order low-pass filter circuit 5 is then emphasis of the present invention.
As shown in Figure 2, this servo control system 4 is by symmetrical expression field effect transistor driving circuit, and the trigger circuit be connected with symmetrical expression field effect transistor driving circuit form.Described symmetrical expression field effect transistor driving circuit is then by the first driving circuit, and the second driving circuit be connected with the first driving circuit forms.
Described first driving circuit is by triode VT1, field effect transistor Q1, field effect transistor Q2, one end is connected with the grid of field effect transistor Q2, the other end is then as the resistance R3 of the input end of this first driving circuit, the diode D1 be in parallel with resistance R3, one end is connected with the base stage of triode VT1, the resistance R1 that the other end is then connected with the P pole of diode D1, N pole is connected with the collector of triode VT1, the diode D2 of ground connection while P pole is then connected with the drain electrode of field effect transistor Q2, P pole is connected with the second driving circuit, the diode D3 that N pole is then connected with the collector of triode VT1 after resistance R2, and positive pole is connected with the N pole of diode D3, the polar capacitor C1 that negative pole is then connected with the P pole of diode D2 forms.The P pole of described diode D1 is extremely all connected with trigger circuit with N; Grounded emitter, its collector of described triode VT1 are then connected with the grid of field effect transistor Q1; The drain electrode of described field effect transistor Q1 is connected with the N pole of diode D3, its source electrode is then connected with the drain electrode of field effect transistor Q2; The source electrode of described field effect transistor Q2 is then connected with the second driving circuit and trigger circuit respectively.
The second described driving circuit is by field effect transistor Q3, field effect transistor Q4, triode VT5, one end is connected with the grid of field effect transistor Q4, the other end is then as the resistance R8 of the output terminal of this second driving circuit, the diode D6 be in parallel with resistance R8, one end is connected with the base stage of triode VT5, the resistance R9 that the other end is then connected with the P pole of diode D6, N pole is connected with the collector of triode VT5, the diode D5 of ground connection while P pole is then connected with the drain electrode of field effect transistor Q4, P pole is connected with the P pole of diode D3, the diode D4 that N pole is then connected with the collector of triode VT5 after resistance R7, and positive pole is connected with the N pole of diode D4, the polar capacitor C3 that negative pole is then connected with the P pole of diode D5 forms.The P pole of described diode D6 is also connected with trigger circuit; Grounded emitter, its collector of triode VT5 are then connected with the grid of field effect transistor Q3; The drain electrode of described field effect transistor Q3 is connected with the N pole of diode D4, its source electrode is then connected with the drain electrode of field effect transistor Q4; The source electrode of described field effect transistor Q4 is then connected with the source electrode of field effect transistor Q2.
Signal carries out reverse drive through field effect transistor Q3 and field effect transistor Q4 again after field effect transistor Q1 and field effect transistor Q2 drives, thus improves the control accuracy of the present invention to servomotor 2.Better drive effect to reach, described field effect transistor Q1, field effect transistor Q2, field effect transistor Q3 and field effect transistor Q4 preferentially adopt enhancement mode PNP field effect transistor to realize.
Described trigger circuit are by triode VT2, triode VT3, flip chip U, the resistance R4 be in parallel with diode D1, the resistance R5 that one end is connected with the P pole of diode D1, the other end is then connected with the base stage of triode VT2, the resistance R6 of ground connection while one end is connected with the source electrode of field effect transistor Q2, the other end is then connected with the RESET pin of flip chip U, and the polar capacitor C2 that negative pole is connected with the emitter of triode VT3, positive pole is then connected with the base stage of triode VT4 forms.Grounded emitter, its collector of described triode VT2 are then connected with the N pole of diode D1; The base stage of described triode VT3 is connected with the collector of triode VT2, its collector is then connected with the collector of triode VT4; The grounded emitter of described triode VT4, its collector are then connected with the CLK pin of flip chip U and DATA pin respectively; The SET pin of described flip chip U is connected with its RESET pin, its Q2 pin is then connected with the P pole of diode D6.In order to reach better implementation result, described flip chip U is preferably CD4013 integrated circuit to realize.
As shown in Figure 3, this second-order low-pass filter circuit 5 is by amplifier P1, and amplifier P2, unidirectional thyristor D8, resistance R10, resistance R11, resistance R12, resistance R13, polar capacitor C4, polar capacitor C5 and diode D7 form.During connection, one end of this resistance R11 is connected with the positive pole of amplifier P1, its other end ground connection, one end of resistance R12 is connected with the negative pole of amplifier P1, its other end then after resistance R10 as the input end of this second-order low-pass filter circuit 5, the N pole of diode D7 is connected with the N pole of unidirectional thyristor D8, its P pole is then connected with the P pole of unidirectional thyristor D8 after polar capacitor C4, one end of resistance R13 is connected with the control pole of unidirectional thyristor D8, its other end is then connected with the output terminal of amplifier P1, the positive pole of polar capacitor C5 is connected with the negative pole of amplifier P2, negative pole is then connected with the positive pole of amplifier P1.The P pole of described unidirectional thyristor D8 is connected with the tie point of resistance R12 with resistance R10, its N pole is then connected with the output terminal of amplifier P1.As the output terminal of this second-order low-pass filter circuit 5 while the negative pole of described amplifier P2 is connected with the output terminal of amplifier P1, its positive pole is then connected with its output terminal, its output terminal is then connected with the output terminal of amplifier P1.This second-order low-pass filter circuit 5 can filter out the undesired signal of system, makes the parameters signal of tested engine 1 more accurate.
As mentioned above, just well the present invention can be realized.
Claims (7)
1. the engine TT&C system based on second-order low-pass filter circuit, it is by tested engine (1), the sensing system (3) be connected with tested engine (1) and servomotor (2), the servo control system (4) be connected with servomotor (2), the test board PC(6 be connected with servo control system (4)), and with test board PC(6) background server (7) that is connected forms, it is characterized in that: at sensing system (3) and test board PC(6) between be also provided with second-order low-pass filter circuit (5), described second-order low-pass filter circuit (5) is by amplifier P1, amplifier P2, unidirectional thyristor D8, one end is connected with the positive pole of amplifier P1, the resistance R11 of other end ground connection, one end is connected with the negative pole of amplifier P1, the other end then after resistance R10 as the resistance R12 of the input end of this second-order low-pass filter circuit (5), N pole is connected with the N pole of unidirectional thyristor D8, the diode D7 that P pole is then connected with the P pole of unidirectional thyristor D8 after polar capacitor C4, one end is connected with the control pole of unidirectional thyristor D8, the resistance R13 that the other end is then connected with the output terminal of amplifier P1, and positive pole is connected with the negative pole of amplifier P2, the polar capacitor C5 that negative pole is then connected with the positive pole of amplifier P1 forms, the P pole of described unidirectional thyristor D8 is connected with the tie point of resistance R12 with resistance R10, its N pole is then connected with the output terminal of amplifier P1, as the output terminal of this second-order low-pass filter circuit (5) while the negative pole of described amplifier P2 is connected with the output terminal of amplifier P1, its positive pole is then connected with its output terminal, its output terminal is then connected with the output terminal of amplifier P1.
2. a kind of engine TT&C system based on second-order low-pass filter circuit according to claim 1, it is characterized in that: described servo control system (4) is then by symmetrical expression field effect transistor driving circuit, and the trigger circuit be connected with symmetrical expression field effect transistor driving circuit form; Described symmetrical expression field effect transistor driving circuit is then by the first driving circuit, and the second driving circuit be connected with the first driving circuit forms.
3. a kind of engine TT&C system based on second-order low-pass filter circuit according to claim 2, it is characterized in that: described first driving circuit is by triode VT1, field effect transistor Q1, field effect transistor Q2, one end is connected with the grid of field effect transistor Q2, the other end is then as the resistance R3 of the input end of this first driving circuit, the diode D1 be in parallel with resistance R3, one end is connected with the base stage of triode VT1, the resistance R1 that the other end is then connected with the P pole of diode D1, N pole is connected with the collector of triode VT1, the diode D2 of ground connection while P pole is then connected with the drain electrode of field effect transistor Q2, P pole is connected with the second driving circuit, the diode D3 that N pole is then connected with the collector of triode VT1 after resistance R2, and positive pole is connected with the N pole of diode D3, the polar capacitor C1 that negative pole is then connected with the P pole of diode D2 forms, the P pole of described diode D1 is extremely all connected with trigger circuit with N, grounded emitter, its collector of described triode VT1 are then connected with the grid of field effect transistor Q1, the drain electrode of described field effect transistor Q1 is connected with the N pole of diode D3, its source electrode is then connected with the drain electrode of field effect transistor Q2, the source electrode of described field effect transistor Q2 is then connected with the second driving circuit and trigger circuit respectively.
4. a kind of engine TT&C system based on second-order low-pass filter circuit according to claim 3, it is characterized in that: the second described driving circuit is by field effect transistor Q3, field effect transistor Q4, triode VT5, one end is connected with the grid of field effect transistor Q4, the other end is then as the resistance R8 of the output terminal of this second driving circuit, the diode D6 be in parallel with resistance R8, one end is connected with the base stage of triode VT5, the resistance R9 that the other end is then connected with the P pole of diode D6, N pole is connected with the collector of triode VT5, the diode D5 of ground connection while P pole is then connected with the drain electrode of field effect transistor Q4, P pole is connected with the P pole of diode D3, the diode D4 that N pole is then connected with the collector of triode VT5 after resistance R7, and positive pole is connected with the N pole of diode D4, the polar capacitor C3 that negative pole is then connected with the P pole of diode D5 forms, the P pole of described diode D6 is also connected with trigger circuit, grounded emitter, its collector of triode VT5 are then connected with the grid of field effect transistor Q3, the drain electrode of described field effect transistor Q3 is connected with the N pole of diode D4, its source electrode is then connected with the drain electrode of field effect transistor Q4, the source electrode of described field effect transistor Q4 is then connected with the source electrode of field effect transistor Q2.
5. a kind of engine TT&C system based on second-order low-pass filter circuit according to claim 4, it is characterized in that: described trigger circuit are by triode VT2, triode VT3, flip chip U, the resistance R4 be in parallel with diode D1, one end is connected with the P pole of diode D1, the resistance R5 that the other end is then connected with the base stage of triode VT2, one end is connected with the source electrode of field effect transistor Q2, the resistance R6 of ground connection while the other end is then connected with the RESET pin of flip chip U, and negative pole is connected with the emitter of triode VT3, the polar capacitor C2 that positive pole is then connected with the base stage of triode VT4 forms, grounded emitter, its collector of described triode VT2 are then connected with the N pole of diode D1, the base stage of described triode VT3 is connected with the collector of triode VT2, its collector is then connected with the collector of triode VT4, the grounded emitter of described triode VT4, its collector are then connected with the CLK pin of flip chip U and DATA pin respectively, the SET pin of described flip chip U is connected with its RESET pin, its Q2 pin is then connected with the P pole of diode D6.
6. a kind of engine TT&C system based on second-order low-pass filter circuit according to claim 5, is characterized in that: described flip chip U is CD4013 integrated circuit.
7. a kind of engine TT&C system based on second-order low-pass filter circuit according to claim 6, is characterized in that: described field effect transistor Q1, field effect transistor Q2, field effect transistor Q3 and field effect transistor Q4 are enhancement mode PNP field effect transistor.
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| CN201510257568.6A CN104849053A (en) | 2015-05-19 | 2015-05-19 | Engine measurement and control system based on second-order low-pass filter circuit |
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| CN201510257568.6A CN104849053A (en) | 2015-05-19 | 2015-05-19 | Engine measurement and control system based on second-order low-pass filter circuit |
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| CN1884992A (en) * | 2005-06-22 | 2006-12-27 | 上海华依科技发展有限公司 | Engine testing system and testing method thereof |
| CN101262162A (en) * | 2007-03-06 | 2008-09-10 | 桂林吉星电子等平衡动力有限公司 | Fuel engine servo loading device and its dynamic optimization operation control method |
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Application publication date: 20150819 |