CN104792381A - Phase shifting type engine oil consumption detecting system - Google Patents
Phase shifting type engine oil consumption detecting system Download PDFInfo
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- CN104792381A CN104792381A CN201510172227.9A CN201510172227A CN104792381A CN 104792381 A CN104792381 A CN 104792381A CN 201510172227 A CN201510172227 A CN 201510172227A CN 104792381 A CN104792381 A CN 104792381A
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- 239000010705 motor oil Substances 0.000 title abstract description 7
- 238000000034 method Methods 0.000 claims abstract description 28
- 238000001914 filtration Methods 0.000 claims abstract description 25
- 230000005669 field effect Effects 0.000 claims description 36
- 239000000295 fuel oil Substances 0.000 claims description 17
- 238000005259 measurement Methods 0.000 claims description 13
- 230000002457 bidirectional Effects 0.000 claims description 12
- 238000001514 detection method Methods 0.000 claims description 12
- 230000000087 stabilizing Effects 0.000 claims description 6
- 239000003921 oil Substances 0.000 claims description 5
- 239000000446 fuel Substances 0.000 abstract description 12
- 230000001276 controlling effect Effects 0.000 abstract description 3
- 238000010586 diagram Methods 0.000 description 4
- 238000011056 performance test Methods 0.000 description 2
- 230000015556 catabolic process Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000000875 corresponding Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000010304 firing Methods 0.000 description 1
Abstract
The invention discloses a phase shifting type engine oil consumption detecting system. The phase shifting type engine oil consumption detecting system is mainly composed of a single-chip processor (1), a detected power platform, a detected engine arranged on the detected power platform, a measuring and controlling instrument (4), a power analyzer (2), an accelerator driver (5) connected with the measuring and controlling instrument (4), a motor controller (3) connected with the power analyzer (2), a fuel signal collecting system (6) connected with the detected engine and a two-level low-pass filtering and amplifying system (7) connected with the fuel signal collecting system (6), wherein the measuring and control instrument (4) and the power analyzer (2) are connected with the single-chip processor (1). The phase shifting type engine oil consumption detecting system is characterized in that a phase shifting processing system (8) is further arranged between the two-level low-pass filtering and amplifying system (7) and the single-chip processor (1). According to the phase shifting type engine oil consumption detecting system, the two-level low-pass filtering and amplifying system and the phase shifting processing system can process collected signals, the fidelity of the processed signals is higher, and therefore the precision of the engine oil consumption detecting system can be improved.
Description
Technical field
The present invention relates to Engine Block Test field, specifically refer to a kind of phase shift engine consumption detection system.
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.And engine performance test is the Main Means judging condition of the engine quality, be also the important content of automotive check and maintenance job, therefore engine performance measuring is more and more subject to people's attention.In addition, fuel consumption is the important indicator of engine evaluated economy, is one of important measurement parameter of engine.Therefore the measurement of fuel consumption is the important component part of engine performance test, and its measuring accuracy directly affects engine actual performance index, every technical parameter is determined and the apolegamy of main accessories and adjustment etc.But the measuring accuracy of traditional engine fuel test macro is not high, this just brings very large difficulty to engine performance assessment.Therefore, a kind of high-precision engine fuel test macro is provided to be then the current task of top priority of people.
Summary of the invention
The object of the invention is to overcome the defect that the measuring accuracy of traditional engine consumption test macro is not high, a kind of phase shift engine consumption detection system is provided.
Object of the present invention is achieved through the following technical solutions: a kind of phase shift engine consumption detection system, primarily of single-chip microcomputer, tested power platform, and the tested engine be arranged on tested power platform, the measurement and control instrument be connected with single-chip microcomputer and power analyzer, the accelerator drive instrument be connected with measurement and control instrument, the electric machine controller be connected with power analyzer, the fuel oil signal acquiring system be connected with tested engine, and the two-stage low-pass filtering be connected with fuel oil signal acquiring system is amplified disposal system and is formed; This measurement and control instrument is also connected with tested engine, amplifies between disposal system and single-chip microcomputer be also provided with phase shift disposal system in two-stage low-pass filtering.
Further, described phase shift disposal system is by transformer T, triode VT8, triode VT9, field effect transistor Q1, dual-gate field-effect pipe Q2, amplifier P4, negative pole is connected with the negative pole of amplifier P4 after resistance R14, positive pole is as the electric capacity C7 of circuit input end, one end is connected with the emitter of triode VT8, the resistance R12 that the other end is connected with the negative pole of electric capacity C7, one end is connected with the base stage of triode VT8, the resistance R13 of other end ground connection, P pole is connected with the emitter of triode VT8, N pole is in turn through resistance R16, the diode D9 be connected with transformer T former limit Same Name of Ends after resistance R18 and resistance R20, one end is connected with the N pole of diode D9, the resistance R15 that the other end is connected with the drain electrode of field effect transistor Q1, one end is connected with the grid of field effect transistor Q1, the resistance R17 of other end ground connection, positive pole is connected with the tie point of resistance R18 with resistance R16, the electric capacity C8 that negative pole is connected with the emitter of triode VT9, be serially connected in the electric capacity C9 between the negative pole of amplifier P4 and output terminal, N pole is connected with the b grid of dual-gate field-effect pipe Q2, the diode D10 that P pole is connected with the output terminal of amplifier P4 after resistance R19, positive pole is connected with the source electrode of dual-gate field-effect pipe Q2, the electric capacity C10 of minus earth, and form with the resistance R21 that electric capacity C10 is in parallel, the emitter of triode VT8 is connected with the positive pole of electric capacity C7, collector is connected with the N pole of diode D9, the source electrode of field effect transistor Q1 is connected with positive pole with the negative pole of amplifier P4 simultaneously, grid is connected with the base stage of triode VT9, the collector of triode VT9 is connected with the P pole of diode D10, and a grounded-grid, the drain electrode of dual-gate field-effect pipe Q2 are then connected with transformer T former limit non-same polarity, described transformer T secondary Same Name of Ends ground connection, non-same polarity are as signal output part.
Described two-stage low-pass filtering amplifies disposal system by two-stage low-pass filtering amplifying circuit, and the output circuit be connected with two-stage low-pass filtering amplifying circuit forms.
Described two-stage low-pass filtering amplifying circuit is by amplifier P2, amplifier P3, triode VT5, triode VT6, triode VT7, bidirectional thyristor D4, negative pole is connected with the positive pole of amplifier P2, positive pole after resistance R8 as the electric capacity C1 of circuit input end, one end is connected with the collector of triode VT5, the resistance R9 of other end ground connection after resistance R10, P pole is connected with the control pole of bidirectional thyristor D4, the diode D5 that N pole is connected with the base stage of triode VT6 after electric capacity C2, positive pole is connected with the emitter of triode VT6, the electric capacity C3 of minus earth, P pole is connected with the emitter of triode VT6, the voltage stabilizing diode D6 that N pole is connected with the base stage of triode VT7, one end is connected with the collector of triode VT7, the resistance R11 that the other end is connected with the output terminal of amplifier P3, negative pole is connected with the emitter of triode VT7, the electric capacity C5 that positive pole is connected with the output terminal of amplifier P3, and positive pole is connected with the positive pole of amplifier P3, the electric capacity C4 that negative pole is connected with the output terminal of amplifier P3 forms, the base stage of described triode VT5 is connected with the tie point of electric capacity C1 with resistance R8, emitter is connected with the first anode of bidirectional thyristor D4, the second anode of bidirectional thyristor D4 is connected with the collector of triode VT6, minus earth, the output terminal of amplifier P2 are connected with the tie point of resistance R10 and the N pole of diode D5 with resistance R9 simultaneously, and the negative pole of amplifier P3 is connected with the collector of triode VT6, output terminal is connected with output circuit.
Described output circuit comprises process chip U, diode D7, diode D8, electric capacity C6, field effect transistor Q; The P pole of described diode D7 is connected with the output terminal of amplifier P3, N pole is connected with the VCC pin of process chip U, the N pole of diode D8 is with the LOG pin of process chip U and I/O pin is connected, P pole ground connection, the positive pole of electric capacity C6 is connected with the KA pin of process chip U, negative pole is connected with the P pole of diode D8, and the grid of field effect transistor Q is connected with the HOG pin of process chip U, grounded drain, source electrode are connected with the VS pin of process chip U; The IS pin of described process chip U and DT pin are all simultaneously with the P pole of diode D7 and the output terminal of amplifier P3 is connected, GND pin ground connection.
Described fuel oil signal acquiring system is by flow sensor, triode VT1, triode VT2, triode VT3, triode VT4, amplifier P1, P pole is connected with the output terminal of flow sensor, the N pole then diode D1 of ground connection after resistance R1 and resistance R2 in turn, one end is connected with the P pole of diode D1, the resistance R4 that the other end is connected with the positive pole of amplifier P1, N pole is connected with the positive pole of amplifier P1, the voltage stabilizing diode D2 of P pole ground connection, P pole is connected with the positive pole of amplifier P1 after resistance R7, the diode D3 that N pole is connected with the emitter of triode VT4, and one end is connected with the base stage of triode VT2, the resistance R3 that the other end is connected with the base stage of triode VT3 after resistance R6 through resistance R5 in turn forms, the base stage of described triode VT1 is connected with the tie point of resistance R2 with resistance R1, emitter is connected with the emitter of triode VT2, collector is connected with the base stage of triode VT2, the collector of triode VT2 is connected with the tie point of resistance R6 with resistance R5, emitter is connected with the collector of triode VT3, the emitter of triode VT3 is all connected with the collector of triode VT4 with base stage, and the negative pole of amplifier P1 is connected with the collector of triode VT2, output terminal is connected with the base stage of triode VT4.
Described process chip U is PM2020A integrated circuit, and flow sensor is V4OEM series oil consumption flow sensor.
Described field effect transistor Q and field effect transistor Q1 is technotron.
The present invention comparatively prior art compares, and has the following advantages and beneficial effect:
(1) collecting efficiency of fuel oil signal acquiring system of the present invention to fuel oil signal is high, is swift in response.
(2) two-stage low-pass filtering of the present invention amplifies disposal system and phase shift disposal system, and can process gathering the signal come, the signal fidelity after process is higher, thus can improve the degree of accuracy of fuel consume test macro.
Accompanying drawing explanation
Fig. 1 is one-piece construction schematic diagram of the present invention;
Fig. 2 is phase shift disposal system electrical block diagram of the present invention;
Fig. 3 is that two-stage low-pass filtering of the present invention amplifies disposal system electrical block diagram;
Fig. 4 is fuel oil signal acquiring system electrical block diagram of the present invention.
Reference numeral name in above accompanying drawing is called:
1-single-chip microcomputer, 2-power analyzer, 3-electric machine controller, 4-measurement and control instrument, 5-accelerator drive instrument, 6-fuel oil signal acquiring system, 7-two-stage low-pass filtering amplifies disposal system, 8-phase shift disposal system.
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 power platform, be fixed on the tested engine on tested power platform.In order to detect the oil consumption of tested engine, the present invention also includes single-chip microcomputer 1, the measurement and control instrument 4 be connected with single-chip microcomputer 1 and power analyzer 2, the accelerator drive instrument 5 be connected with measurement and control instrument 4, the electric machine controller 3 be connected with power analyzer 2, the fuel oil signal acquiring system 6 be connected with tested engine, the two-stage low-pass filtering be connected with fuel oil signal acquiring system 6 amplifies disposal system 7, and amplifies with two-stage low-pass filtering the phase shift disposal system 8 that disposal system 7 is connected.This phase shift disposal system 8 is connected with single-chip microcomputer 1 by RS232 connection, and this measurement and control instrument 4 is also connected with tested engine.
Wherein, single-chip microcomputer 1 is as control system of the present invention, electric machine controller 3 is for controlling the start and stop of tested engine, power analyzer 2 is for detecting the output power of tested engine, accelerator drive instrument 5 for providing fuel oil for tested engine, and is shown by measurement and control instrument 4 and controls its fuel delivery amount.Fuel oil signal acquiring system 6 is for gathering the fuel flow signal of tested engine, this fuel flow signal is after the process that two-stage low-pass filtering amplifies disposal system 7 and phase shift disposal system 8, flow to single-chip microcomputer 1 by RS232 connection, then calculated by single-chip microcomputer 1 according to the fuel consume of fuel flow signal to tested engine and show.
As shown in Figure 4, described fuel oil signal acquiring system 6 is by the flow sensor be arranged on tested engine oil inlet pipe, triode VT1, triode VT2, triode VT3, triode VT4, amplifier P1, P pole is connected with the output terminal of flow sensor, the N pole then diode D1 of ground connection after resistance R1 and resistance R2 in turn, one end is connected with the P pole of diode D1, the resistance R4 that the other end is connected with the positive pole of amplifier P1, N pole is connected with the positive pole of amplifier P1, the voltage stabilizing diode D2 of P pole ground connection, P pole is connected with the positive pole of amplifier P1 after resistance R7, the diode D3 that N pole is connected with the emitter of triode VT4, and one end is connected with the base stage of triode VT2, the resistance R3 that the other end is connected with the base stage of triode VT3 after resistance R6 through resistance R5 in turn forms.The base stage of described triode VT1 is connected with the tie point of resistance R2 with resistance R1, emitter is connected with the emitter of triode VT2, collector is connected with the base stage of triode VT2, the collector of triode VT2 is connected with the tie point of resistance R6 with resistance R5, emitter is connected with the collector of triode VT3, the emitter of triode VT3 is all connected with the collector of triode VT4 with base stage, and the negative pole of amplifier P1 is connected with the collector of triode VT2, output terminal is connected with the base stage of triode VT4.
When starting tested engine, fuel oil then can be transported to the firing chamber of tested engine from oil inlet pipe, and at this moment flow sensor then can detect the operational throughput of fuel oil and it is changed into the output of corresponding electric signal.In order to better implement the present invention, this flow sensor is preferably the V4OEM series oil consumption flow sensor of Shanghai Ci Xi instrument and meter company limited, and its maximum error is ± 1%.
As shown in Figure 3, two-stage low-pass filtering amplifies disposal system 7 by two-stage low-pass filtering amplifying circuit, and the output circuit be connected with two-stage low-pass filtering amplifying circuit forms.
Two-stage low-pass filtering amplifying circuit is wherein by amplifier P2, amplifier P3, triode VT5, triode VT6, triode VT7, bidirectional thyristor D4, negative pole is connected with the positive pole of amplifier P2, positive pole after resistance R8 as the electric capacity C1 of circuit input end, one end is connected with the collector of triode VT5, the resistance R9 of other end ground connection after resistance R10, P pole is connected with the control pole of bidirectional thyristor D4, the diode D5 that N pole is connected with the base stage of triode VT6 after electric capacity C2, positive pole is connected with the emitter of triode VT6, the electric capacity C3 of minus earth, P pole is connected with the emitter of triode VT6, the voltage stabilizing diode D6 that N pole is connected with the base stage of triode VT7, one end is connected with the collector of triode VT7, the resistance R11 that the other end is connected with the output terminal of amplifier P3, negative pole is connected with the emitter of triode VT7, the electric capacity C5 that positive pole is connected with the output terminal of amplifier P3, and positive pole is connected with the positive pole of amplifier P3, the electric capacity C4 that negative pole is connected with the output terminal of amplifier P3 forms.The base stage of described triode VT5 is connected with the tie point of electric capacity C1 with resistance R8, emitter is connected with the first anode of bidirectional thyristor D4, the second anode of bidirectional thyristor D4 is connected with the collector of triode VT6, minus earth, the output terminal of amplifier P2 are connected with the tie point of resistance R10 and the N pole of diode D5 with resistance R9 simultaneously, and the negative pole of amplifier P3 is connected with the collector of triode VT6, output terminal is connected with output circuit.
Described output circuit comprises process chip U, diode D7, diode D8, electric capacity C6, field effect transistor Q.During connection, the P pole of diode D7 is connected with the output terminal of amplifier P3, N pole is connected with the VCC pin of process chip U, the N pole of diode D8 is with the LOG pin of process chip U and I/O pin is connected, P pole ground connection, the positive pole of electric capacity C6 is connected with the KA pin of process chip U, negative pole is connected with the P pole of diode D8, and the grid of field effect transistor Q is connected with the HOG pin of process chip U, grounded drain, source electrode are connected with the VS pin of process chip U.The IS pin of described process chip U and DT pin are all simultaneously with the P pole of diode D7 and the output terminal of amplifier P3 is connected, GND pin ground connection.This process chip U is preferably PM2020A integrated circuit, and field effect transistor Q is then technotron.
Phase shift disposal system 8 is emphasis place of the present invention, as shown in Figure 2, it is by transformer T, triode VT8, triode VT9, field effect transistor Q1, dual-gate field-effect pipe Q2, amplifier P4, negative pole is connected with the negative pole of amplifier P4 after resistance R14, positive pole is as the electric capacity C7 of circuit input end, one end is connected with the emitter of triode VT8, the resistance R12 that the other end is connected with the negative pole of electric capacity C7, one end is connected with the base stage of triode VT8, the resistance R13 of other end ground connection, P pole is connected with the emitter of triode VT8, N pole is in turn through resistance R16, the diode D9 be connected with transformer T former limit Same Name of Ends after resistance R18 and resistance R20, one end is connected with the N pole of diode D9, the resistance R15 that the other end is connected with the drain electrode of field effect transistor Q1, one end is connected with the grid of field effect transistor Q1, the resistance R17 of other end ground connection, positive pole is connected with the tie point of resistance R18 with resistance R16, the electric capacity C8 that negative pole is connected with the emitter of triode VT9, be serially connected in the electric capacity C9 between the negative pole of amplifier P4 and output terminal, N pole is connected with the b grid of dual-gate field-effect pipe Q2, the diode D10 that P pole is connected with the output terminal of amplifier P4 after resistance R19, positive pole is connected with the source electrode of dual-gate field-effect pipe Q2, the electric capacity C10 of minus earth, and form with the resistance R21 that electric capacity C10 is in parallel.The emitter of triode VT8 is connected with the positive pole of electric capacity C7, collector is connected with the N pole of diode D9, the source electrode of field effect transistor Q1 is connected with positive pole with the negative pole of amplifier P4 simultaneously, grid is connected with the base stage of triode VT9, the collector of triode VT9 is connected with the P pole of diode D10, and a grounded-grid, the drain electrode of dual-gate field-effect pipe Q2 are then connected with transformer T former limit non-same polarity; Described transformer T secondary Same Name of Ends ground connection, non-same polarity are connected with single-chip microcomputer 1 as signal output part.This phase shift disposal system 8 can carry out Phase Processing to signal, signal is debugged the state of optimum.And this field effect transistor Q1 is preferably as technotron realizes.
As mentioned above, just well the present invention can be realized.
Claims (8)
1. a phase shift engine consumption detection system, primarily of single-chip microcomputer (1), tested power platform, and the tested engine be arranged on tested power platform, the measurement and control instrument (4) be connected with single-chip microcomputer (1) and power analyzer (2), the accelerator drive instrument (5) be connected with measurement and control instrument (4), the electric machine controller (3) be connected with power analyzer (2), the fuel oil signal acquiring system (6) be connected with tested engine, and the two-stage low-pass filtering be connected with fuel oil signal acquiring system (6) is amplified disposal system (7) and is formed; This measurement and control instrument (4) is also connected with tested engine; It is characterized in that, amplify between disposal system (7) and single-chip microcomputer (1) in two-stage low-pass filtering and be also provided with phase shift disposal system (8);
Described phase shift disposal system (8) is by transformer T, triode VT8, triode VT9, field effect transistor Q1, dual-gate field-effect pipe Q2, amplifier P4, negative pole is connected with the negative pole of amplifier P4 after resistance R14, positive pole is as the electric capacity C7 of circuit input end, one end is connected with the emitter of triode VT8, the resistance R12 that the other end is connected with the negative pole of electric capacity C7, one end is connected with the base stage of triode VT8, the resistance R13 of other end ground connection, P pole is connected with the emitter of triode VT8, N pole is in turn through resistance R16, the diode D9 be connected with transformer T former limit Same Name of Ends after resistance R18 and resistance R20, one end is connected with the N pole of diode D9, the resistance R15 that the other end is connected with the drain electrode of field effect transistor Q1, one end is connected with the grid of field effect transistor Q1, the resistance R17 of other end ground connection, positive pole is connected with the tie point of resistance R18 with resistance R16, the electric capacity C8 that negative pole is connected with the emitter of triode VT9, be serially connected in the electric capacity C9 between the negative pole of amplifier P4 and output terminal, N pole is connected with the b grid of dual-gate field-effect pipe Q2, the diode D10 that P pole is connected with the output terminal of amplifier P4 after resistance R19, positive pole is connected with the source electrode of dual-gate field-effect pipe Q2, the electric capacity C10 of minus earth, and form with the resistance R21 that electric capacity C10 is in parallel, the emitter of triode VT8 is connected with the positive pole of electric capacity C7, collector is connected with the N pole of diode D9, the source electrode of field effect transistor Q1 is connected with positive pole with the negative pole of amplifier P4 simultaneously, grid is connected with the base stage of triode VT9, the collector of triode VT9 is connected with the P pole of diode D10, and a grounded-grid, the drain electrode of dual-gate field-effect pipe Q2 are then connected with transformer T former limit non-same polarity, described transformer T secondary Same Name of Ends ground connection, non-same polarity are as signal output part.
2. a kind of phase shift engine consumption detection system according to claim 1, it is characterized in that: described two-stage low-pass filtering amplifies disposal system (7) by two-stage low-pass filtering amplifying circuit, and the output circuit be connected with two-stage low-pass filtering amplifying circuit forms.
3. a kind of phase shift engine consumption detection system according to claim 2, it is characterized in that: described two-stage low-pass filtering amplifying circuit is by amplifier P2, amplifier P3, triode VT5, triode VT6, triode VT7, bidirectional thyristor D4, negative pole is connected with the positive pole of amplifier P2, positive pole after resistance R8 as the electric capacity C1 of circuit input end, one end is connected with the collector of triode VT5, the resistance R9 of other end ground connection after resistance R10, P pole is connected with the control pole of bidirectional thyristor D4, the diode D5 that N pole is connected with the base stage of triode VT6 after electric capacity C2, positive pole is connected with the emitter of triode VT6, the electric capacity C3 of minus earth, P pole is connected with the emitter of triode VT6, the voltage stabilizing diode D6 that N pole is connected with the base stage of triode VT7, one end is connected with the collector of triode VT7, the resistance R11 that the other end is connected with the output terminal of amplifier P3, negative pole is connected with the emitter of triode VT7, the electric capacity C5 that positive pole is connected with the output terminal of amplifier P3, and positive pole is connected with the positive pole of amplifier P3, the electric capacity C4 that negative pole is connected with the output terminal of amplifier P3 forms, the base stage of described triode VT5 is connected with the tie point of electric capacity C1 with resistance R8, emitter is connected with the first anode of bidirectional thyristor D4, the second anode of bidirectional thyristor D4 is connected with the collector of triode VT6, minus earth, the output terminal of amplifier P2 are connected with the tie point of resistance R10 and the N pole of diode D5 with resistance R9 simultaneously, and the negative pole of amplifier P3 is connected with the collector of triode VT6, output terminal is connected with output circuit.
4. a kind of phase shift engine consumption detection system according to claim 3, is characterized in that: described output circuit comprises process chip U, diode D7, diode D8, electric capacity C6, field effect transistor Q; The P pole of described diode D7 is connected with the output terminal of amplifier P3, N pole is connected with the VCC pin of process chip U, the N pole of diode D8 is with the LOG pin of process chip U and I/O pin is connected, P pole ground connection, the positive pole of electric capacity C6 is connected with the KA pin of process chip U, negative pole is connected with the P pole of diode D8, and the grid of field effect transistor Q is connected with the HOG pin of process chip U, grounded drain, source electrode are connected with the VS pin of process chip U; The IS pin of described process chip U and DT pin are all simultaneously with the P pole of diode D7 and the output terminal of amplifier P3 is connected, GND pin ground connection.
5. a kind of phase shift engine consumption detection system according to claim 4, it is characterized in that: described fuel oil signal acquiring system (6) is by flow sensor, triode VT1, triode VT2, triode VT3, triode VT4, amplifier P1, P pole is connected with the output terminal of flow sensor, the N pole then diode D1 of ground connection after resistance R1 and resistance R2 in turn, one end is connected with the P pole of diode D1, the resistance R4 that the other end is connected with the positive pole of amplifier P1, N pole is connected with the positive pole of amplifier P1, the voltage stabilizing diode D2 of P pole ground connection, P pole is connected with the positive pole of amplifier P1 after resistance R7, the diode D3 that N pole is connected with the emitter of triode VT4, and one end is connected with the base stage of triode VT2, the resistance R3 that the other end is connected with the base stage of triode VT3 after resistance R6 through resistance R5 in turn forms, the base stage of described triode VT1 is connected with the tie point of resistance R2 with resistance R1, emitter is connected with the emitter of triode VT2, collector is connected with the base stage of triode VT2, the collector of triode VT2 is connected with the tie point of resistance R6 with resistance R5, emitter is connected with the collector of triode VT3, the emitter of triode VT3 is all connected with the collector of triode VT4 with base stage, and the negative pole of amplifier P1 is connected with the collector of triode VT2, output terminal is connected with the base stage of triode VT4.
6. a kind of phase shift engine consumption detection system according to claim 4 or 5, is characterized in that: described process chip U is PM2020A integrated circuit.
7. a kind of phase shift engine consumption detection system according to claim 5, is characterized in that: described flow sensor is V4OEM series oil consumption flow sensor.
8. a kind of phase shift engine consumption detection system according to claim 5, is characterized in that: described field effect transistor Q and field effect transistor Q1 is technotron.
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| CN201510172227.9A CN104792381A (en) | 2015-04-13 | 2015-04-13 | Phase shifting type engine oil consumption detecting system |
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| CN201510172227.9A CN104792381A (en) | 2015-04-13 | 2015-04-13 | Phase shifting type engine oil consumption detecting system |
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| CN104410314A (en) * | 2014-11-26 | 2015-03-11 | 成都创图科技有限公司 | Phase-shift processing based low-pass filtering inverter system |
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