CN104880229A - Low-pass filtering based engine fuel consumption detection system - Google Patents
Low-pass filtering based engine fuel consumption detection system Download PDFInfo
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- CN104880229A CN104880229A CN201510172345.XA CN201510172345A CN104880229A CN 104880229 A CN104880229 A CN 104880229A CN 201510172345 A CN201510172345 A CN 201510172345A CN 104880229 A CN104880229 A CN 104880229A
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Abstract
The invention discloses a low-pass filtering based engine fuel consumption detection system, mainly comprising a single-chip microcomputer (1), a power platform to be detected, an engine to be detected, a measuring and controlling instrument (4), a power analyzer (2), an accelerator driver (5), a motor controller (3), a fuel signal acquisition system (6), and a low-pass filtering system (7). The engine is disposed on the power platform. The measuring and controlling instrument (4) and the power analyzer (2) are connected with the single-chip microcomputer (1). The accelerator driver (5) is connected with the power analyzer (2). The fuel signal acquisition system (6) is connected with the engine. The input end of the low-pass filtering system (7) is connected with the fuel signal acquisition system (6), and the output end thereof is connected with the single-chip microcomputer (1). The system is capable of processing acquired signals, the processed signals are of high fidelity, and thus precision of the system is improved.
Description
Technical field
The present invention relates to Engine Block Test field, specifically refer to that a kind of engine fuel based on low-pass filtering treatment consumes 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 not high defect of traditional engine consumption test system and test precision, provide a kind of engine fuel based on low-pass filtering treatment to consume detection system.
Object of the present invention is achieved through the following technical solutions: a kind of engine fuel based on low-pass filtering treatment consumes detection system, mainly comprise 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 input end is connected with fuel oil signal acquiring system, the low-pass filtering treatment system that output terminal is connected with single-chip microcomputer, described measurement and control instrument is also connected with tested engine, described low-pass filtering treatment system is by low-pass filtering amplifying circuit, and the output circuit be connected with low-pass filtering amplifying circuit forms, between low-pass filtering amplifying circuit and output circuit, be also provided with gain feedback circuit, described gain feedback circuit is by triode VT8, triode VT9, triode VT10, triode VT11, field effect transistor Q1, field effect transistor Q2, diode D9, one end is connected with the base stage of triode VT8, the resistance R12 that the other end is connected with the base stage of triode VT9 after resistance R13, positive pole is connected with the emitter of triode VT8 after resistance R17, the electric capacity C7 that negative pole is connected with the P pole of diode D9, one end is connected with the positive pole of electric capacity C7, the resistance R19 that the other end is connected with the collector of triode VT10, the resistance R18 be in parallel with resistance R19, N pole is connected with the N pole of diode D9, the diode D10 that P pole is connected with the emitter of triode VT11 after resistance R14, one end is connected with the emitter of triode VT9, the resistance R15 that the other end is connected with the P pole of diode D10, one end is connected with the collector of triode VT11, the resistance R16 that the other end is connected with the P pole of diode D10 forms, the emitter of described triode VT8 is connected with the base stage of triode VT10, and collector is connected with the P pole of diode D10, the base stage of described triode VT11 is connected with the emitter of triode VT9, emitter is connected with the emitter of triode VT10, collector is connected with the grid of field effect transistor Q2, the drain electrode of described field effect transistor Q2 is connected with the drain electrode of field effect transistor Q1, source electrode is connected with the P pole of diode D10, the grid of field effect transistor Q1 is connected with the collector of triode VT10, source electrode is connected with the positive pole of electric capacity C7, the N pole of described diode D9 is connected with the drain electrode of field effect transistor Q1, the P pole ground connection of diode D10, the collector of described triode VT9 is connected with the positive pole of electric capacity C7.Described resistance R12 is connected with low-pass filtering amplifying circuit with the tie point of resistance R13, the N pole of diode D9 is connected with output circuit.
Further, described 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 one end is connected with the positive pole of amplifier P3, the electric capacity C4 that the other end 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, the minus earth of amplifier P2, output terminal are connected with the tie point of resistance R10 and the N pole of diode D5 with resistance R9 simultaneously, the negative pole of amplifier P3 is connected with the collector of triode VT6, output terminal while be connected with the tie point of resistance R12 and resistance R13 and 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, KB pin are connected with the N pole of diode D9.
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.
Described flow sensor is V4OEM series oil consumption flow sensor.
Described field effect transistor Q, field effect transistor Q1 and field effect transistor Q2 are 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) the present invention can process gathering the signal come, and the signal fidelity after process is higher, thus can improve the degree of accuracy of fuel consume detection system.
Accompanying drawing explanation
Fig. 1 is one-piece construction schematic diagram of the present invention.
Fig. 2 is low-pass filtering treatment circuit system structural representation of the present invention.
Fig. 3 is gain feedback circuit structural representation of the present invention.
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-low-pass filtering treatment 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, and the low-pass filtering treatment system 7 be connected with fuel oil signal acquiring system 6; This low-pass filtering treatment system 7 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 flows to single-chip microcomputer 1 by RS232 connection after the process of low-pass filtering treatment system 7, is calculated by single-chip microcomputer 1 and shows according to the fuel consume of fuel flow signal to tested engine.
As shown in Figure 4, this 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%.
This low-pass filtering treatment system 7 can do filtering process to fuel flow signal, and as shown in Figure 2, it is by low-pass filtering amplifying circuit, and the output circuit be connected with low-pass filtering amplifying circuit and gain feedback circuit form.
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 one end is connected with the positive pole of amplifier P3, the electric capacity C4 that the other end 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 and gain feedback circuit simultaneously.
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 all simultaneously with the P pole of diode D7 and the output terminal of amplifier P3 is connected, KB pin is connected with gain feedback circuit, GND pin ground connection, VS pin then as the output terminal of circuit, this output terminal is connected with single-chip microcomputer 1.This process chip U is preferably PM2020A integrated circuit, and field effect transistor Q is then technotron.
As shown in Figure 3, this gain feedback circuit is by triode VT8, triode VT9, triode VT10, triode VT11, field effect transistor Q1, field effect transistor Q2, diode D9, one end is connected with the base stage of triode VT8, the resistance R12 that the other end is connected with the base stage of triode VT9 after resistance R13, positive pole is connected with the emitter of triode VT8 after resistance R17, the electric capacity C7 that negative pole is connected with the P pole of diode D9, one end is connected with the positive pole of electric capacity C7, the resistance R19 that the other end is connected with the collector of triode VT10, the resistance R18 be in parallel with resistance R19, N pole is connected with the N pole of diode D9, the diode D10 that P pole is connected with the emitter of triode VT11 after resistance R14, one end is connected with the emitter of triode VT9, the resistance R15 that the other end is connected with the P pole of diode D10, one end is connected with the collector of triode VT11, the resistance R16 that the other end is connected with the P pole of diode D10 forms.The emitter of described triode VT8 is connected with the base stage of triode VT10, and collector is connected with the P pole of diode D10; The base stage of described triode VT11 is connected with the emitter of triode VT9, emitter is connected with the emitter of triode VT10, collector is connected with the grid of field effect transistor Q2; The drain electrode of described field effect transistor Q2 is connected with the drain electrode of field effect transistor Q1, source electrode is connected with the P pole of diode D10; The grid of field effect transistor Q1 is connected with the collector of triode VT10, source electrode is connected with the positive pole of electric capacity C7; The N pole of described diode D9 is connected with the drain electrode of field effect transistor Q1, the P pole ground connection of diode D10; The collector of described triode VT9 is connected with the positive pole of electric capacity C7.Described resistance R12 is connected with the output terminal of amplifier P3 with the tie point of resistance R13, the N pole of diode D9 is connected with the KB pin of process chip U.
As mentioned above, just well the present invention can be realized.
Claims (7)
1. the engine fuel based on low-pass filtering treatment consumes detection system, mainly comprise 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 input end is connected with fuel oil signal acquiring system (6), the low-pass filtering treatment system (7) that output terminal is connected with single-chip microcomputer (1), described measurement and control instrument (4) is also connected with tested engine, described low-pass filtering treatment system (7) is by low-pass filtering amplifying circuit, and the output circuit be connected with low-pass filtering amplifying circuit forms, it is characterized in that: between low-pass filtering amplifying circuit and output circuit, be also provided with gain feedback circuit, described gain feedback circuit is by triode VT8, triode VT9, triode VT10, triode VT11, field effect transistor Q1, field effect transistor Q2, diode D9, one end is connected with the base stage of triode VT8, the resistance R12 that the other end is connected with the base stage of triode VT9 after resistance R13, positive pole is connected with the emitter of triode VT8 after resistance R17, the electric capacity C7 that negative pole is connected with the P pole of diode D9, one end is connected with the positive pole of electric capacity C7, the resistance R19 that the other end is connected with the collector of triode VT10, the resistance R18 be in parallel with resistance R19, N pole is connected with the N pole of diode D9, the diode D10 that P pole is connected with the emitter of triode VT11 after resistance R14, one end is connected with the emitter of triode VT9, the resistance R15 that the other end is connected with the P pole of diode D10, one end is connected with the collector of triode VT11, the resistance R16 that the other end is connected with the P pole of diode D10 forms, the emitter of described triode VT8 is connected with the base stage of triode VT10, and collector is connected with the P pole of diode D10, the base stage of described triode VT11 is connected with the emitter of triode VT9, emitter is connected with the emitter of triode VT10, collector is connected with the grid of field effect transistor Q2, the drain electrode of described field effect transistor Q2 is connected with the drain electrode of field effect transistor Q1, source electrode is connected with the P pole of diode D10, the grid of field effect transistor Q1 is connected with the collector of triode VT10, source electrode is connected with the positive pole of electric capacity C7, the N pole of described diode D9 is connected with the drain electrode of field effect transistor Q1, the P pole ground connection of diode D10, the collector of described triode VT9 is connected with the positive pole of electric capacity C7, and described resistance R12 is connected with low-pass filtering amplifying circuit with the tie point of resistance R13, the N pole of diode D9 is connected with output circuit.
2. a kind of engine fuel based on low-pass filtering treatment according to claim 1 consumes detection system, it is characterized in that: described 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 one end is connected with the positive pole of amplifier P3, the electric capacity C4 that the other end 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, the minus earth of amplifier P2, output terminal are connected with the tie point of resistance R10 and the N pole of diode D5 with resistance R9 simultaneously, the negative pole of amplifier P3 is connected with the collector of triode VT6, output terminal while be connected with the tie point of resistance R12 and resistance R13 and output circuit.
3. a kind of engine fuel based on low-pass filtering treatment according to claim 2 consumes detection system, it 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, KB pin are connected with the N pole of diode D9.
4. a kind of engine fuel based on low-pass filtering treatment according to claim 3 consumes detection system, 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.
5. a kind of engine fuel based on low-pass filtering treatment according to claim 3 or 4 consumes detection system, it is characterized in that: described process chip U is PM2020A integrated circuit.
6. a kind of engine fuel based on low-pass filtering treatment according to claim 4 consumes detection system, it is characterized in that: described flow sensor is V4OEM series oil consumption flow sensor.
7. a kind of engine fuel based on low-pass filtering treatment according to claim 4 consumes detection system, it is characterized in that: described field effect transistor Q, field effect transistor Q1 and field effect transistor Q2 are technotron.
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| CN201510172345.XA CN104880229A (en) | 2015-04-13 | 2015-04-13 | Low-pass filtering based engine fuel consumption detection system |
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| CN105466508A (en) * | 2015-11-20 | 2016-04-06 | 成都科瑞信科技有限责任公司 | Simple oil consumption tester based on signal filtering processing |
| CN105277884A (en) * | 2015-11-21 | 2016-01-27 | 成都科瑞信科技有限责任公司 | Testing rotating speed automatic adjustment type motor test system on the basis of band-pass filtering |
| CN105445661A (en) * | 2015-11-21 | 2016-03-30 | 成都科瑞信科技有限责任公司 | Motor testing system of rotating speed automatic adjustment type based on bandpass filtering and voltage detection |
| CN105467316A (en) * | 2015-11-21 | 2016-04-06 | 成都科瑞信科技有限责任公司 | Voltage-stabilization-type test rotating speed automation adjusting type motor test system based on band-pass filtering |
| CN105467315A (en) * | 2015-11-21 | 2016-04-06 | 成都科瑞信科技有限责任公司 | Test rotating speed automation adjusting type motor test system with high-efficiency signal conversion |
| CN108111168A (en) * | 2017-11-23 | 2018-06-01 | 中国航空工业集团公司西安航空计算技术研究所 | A kind of modified engine fuel flow sensor signal Acquisition Circuit |
| CN108111168B (en) * | 2017-11-23 | 2021-04-20 | 中国航空工业集团公司西安航空计算技术研究所 | Improved engine fuel flow sensor signal acquisition circuit |
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