CN105300582A - DC electric power power-measuring system based on signal linear filtering processing - Google Patents
DC electric power power-measuring system based on signal linear filtering processing Download PDFInfo
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- CN105300582A CN105300582A CN201510818366.4A CN201510818366A CN105300582A CN 105300582 A CN105300582 A CN 105300582A CN 201510818366 A CN201510818366 A CN 201510818366A CN 105300582 A CN105300582 A CN 105300582A
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Abstract
The invention discloses a DC electric power power-measuring system based on signal linear filtering processing. The system comprises a to-be-measured engine, a water temperature constant temperature control unit, a machine oil constant temperature control unit, a fuel oil constant temperature control unit, an intelligent oil consumption instrument, a torque sensor, a DC electric power power-measuring machine, a DCS speed regulator, a control unit, a power supply processing unit, a power grid, a power analyzer, a linear filtering processing unit, and a computer system. Interference signals in torque signals of the to-be-measured engine can be filtered by means of the linear filtering processing unit, so the real-time power output by the to-be-measured engine is more accurate to calculate, and the accuracy for a test worker to determine the performance of the to-be-measured engine is improved.
Description
Technical field
The present invention relates to mechanical test system regions, specifically refer to a kind of direct current power power-measuring system based on linearly filtering process.
Background technology
Engine Dynamic Performance test is the necessary means of measured engine power performance and economic performance.Engine rig test equipment is as the requisite equipment of performance test, can its level height directly have influence on the performance that reflect engine strictly according to the facts, whether the foundation of engine design and improvement can be provided, therefore, it occupy very important position in the raising of the Performance and quality of engine.Dynamometer machine, as the core of engine rig test equipment, plays a part very important wherein.But the hydraulic dynamometer that tradition uses is mainly used in testing high-power engine, its precision measured is low, measuring process operating difficulties; And the power-measuring system that electric eddy current dynamometer and electric A.C. dynamometer form is all very expensive, its price to millions of, and can not record data at hundreds of thousands in time, brings significant limitation to engine performance measuring.In order to solve the problem, there is direct current power power-measuring system on the market at present.But existing its signal of direct current power power-measuring system factor that is easily interfered affects, and makes tester well judge engine performance.
Summary of the invention
The object of the invention is to overcome existing its signal of direct current power power-measuring system to be easily interfered the defect of factor impact, a kind of direct current power power-measuring system based on linearly filtering process is provided.
Object of the present invention is achieved through the following technical solutions: a kind of direct current power power-measuring system based on linearly filtering process, by tested engine, the water temperature temperature control unit be connected with tested engine, machine oil temperature control unit, fuel oil constant-temperature control module, Intelligent Fuel Consumption Instrument and torque sensor, by the electric DC dynamometer that shaft coupling is connected with tested engine, the DCS speed regulator be connected with electric DC dynamometer, the control module be connected with DCS speed regulator respectively and power supply processing unit, the electrical network be connected with power supply processing unit, the linear filtering processing unit be connected with torque sensor, the power analyzer be connected with linear filtering processing unit, and respectively with water temperature temperature control unit, machine oil temperature control unit, fuel oil constant-temperature control module, Intelligent Fuel Consumption Instrument, the computer system composition that power analyzer is connected with control module, described linear filtering processing unit is by filtering chip U2, amplifier P2, amplifier P1, triode VT2, one end is connected with the IN pin of filtering chip U2, the other end then forms the resistance R9 of the input end of this linear filtering processing unit together with the CLK pin of filtering chip U2, be serially connected in the resistance R10 between the IN pin of filtering chip U2 and the negative pole of amplifier P2, be serially connected in the electric capacity C7 between the positive pole of amplifier P2 and output terminal, be serially connected in the resistance R11 between the OUT pin of filtering chip U2 and the negative pole of amplifier P1, and negative pole is connected with the output terminal of amplifier P2, the electric capacity C8 that positive pole is then connected with the output terminal of amplifier P1 forms, the OPIN pin of described filtering chip U2 is all connected with the positive pole of amplifier P1 with its OPOUT pin, the base stage of described triode VT2 is connected with output terminal with the positive pole of amplifier P2 respectively, its grounded emitter, and its collector then forms the output terminal of this linear filtering processing unit together with the output terminal of amplifier P1, the input end of described linear filtering processing unit is connected with torque sensor, its output terminal is then connected with power analyzer.
Described power supply processing unit is by transformer T, be arranged on telefault L1 and the telefault L2 on the former limit of transformer T, be arranged on the telefault L3 of transformer T secondary, the former limit circuit be simultaneously connected with telefault L2 with telefault L1, the current rectifying and wave filtering circuit be connected with former limit circuit and driving circuit, and the output circuit be connected with telefault L3 forms.
Described current rectifying and wave filtering circuit comprises diode rectifier U, resistance R1 and electric capacity C1; The positive pole of described electric capacity C1 is connected with the cathode output end of diode rectifier U after resistance R1, its minus earth, and the input end of described diode rectifier U forms the input end of this power supply processing unit, its cathode output end then ground connection; The positive pole of described electric capacity C1 is also connected with former limit circuit; The input end of described power supply processing unit is connected with electrical network.
Described driving circuit is by driving chip U1, triode VT1, field effect transistor MOS, positive pole is connected with the VREF pin of driving chip U1 after resistance R5, the electric capacity C4 of minus earth, positive pole is connected with the SS pin of driving chip U1, the electric capacity C3 that negative pole is then connected with the negative pole of electric capacity C4, be serially connected in the resistance R4 between the FB pin of driving chip U1 and the negative pole of electric capacity C4, positive pole is connected with the positive pole of electric capacity C1 after resistance R2, the electric capacity C5 of ground connection while negative pole is connected with the GND pin of driving chip U1, one end is connected with the OUT pin of driving chip U1, the resistance R6 that the other end is then connected with the grid of field effect transistor MOS, the diode D2 be in parallel with resistance R6, one end is connected with the source electrode of field effect transistor MOS, the resistance R7 of other end ground connection forms, the RVC pin of described driving chip U1 is connected with the positive pole of electric capacity C4, and its IS pin is then connected with the base stage of triode VT1, and its VCC pin is then connected with the positive pole of electric capacity C5, the described collector of triode VT1 is connected with the source electrode of field effect transistor MOS, its grounded emitter, the drain electrode of described field effect transistor MOS is then connected with former limit circuit.
Described former limit circuit comprises resistance R3, resistance R8, electric capacity C2, diode D1 and diode D3; The P pole of described diode D3 is connected with the drain electrode of field effect transistor MOS, its N pole is connected with the positive pole of electric capacity C1 after resistance R3, electric capacity C2 is then in parallel with resistance R3, and the N pole of diode D1 is connected with the positive pole of electric capacity C5, its P pole is then connected with the non-same polarity of telefault L2 after resistance R8; The Same Name of Ends of described telefault L1 is connected with the positive pole of electric capacity C1, its non-same polarity is then connected with the Same Name of Ends of telefault L2.
Described output circuit comprises diode D4 and electric capacity C6; The output terminal that the P pole of described diode D4 is connected with the non-same polarity of telefault L3, its N pole then forms this power supply processing unit together with the Same Name of Ends of telefault L3; The positive pole of described electric capacity C6 is connected with the Same Name of Ends of telefault L3, and its negative pole is then connected with the N pole of diode D4; The output terminal of described power supply processing unit is connected with DCS speed regulator.
In order to reach better implementation result, the preferred FAN7554 integrated chip of described driving chip U1, described filtering chip U2 then preferentially selects MAX291 integrated chip to realize.
The present invention comparatively prior art compares, and has the following advantages and beneficial effect:
(1) the present invention adopts electric DC dynamometer to load, and it is applicable to test high-power and low power engine, expands its range of application.
(2) the present invention adopts four-quadrant control technology, by the back electrical energy electrical network that motor absorbs, for other equipment use, can play the performance of motor to greatest extent, and economize energy.
(3) the present invention adopts computer technology and digital control technology to control, and improves the automaticity of equipment, also improves the control accuracy of equipment and measuring accuracy and equipment reliability of operation and stability simultaneously.
(4) the power-measuring system cost that the present invention is more traditional is more cheap, is only 70% of traditional power-measuring system.
(5) the present invention can filter out the undesired signal in tested engine torque signal by linear filtering processing unit, and the realtime power that tested engine is exported is more accurate, improves the accuracy that tester judges tested engine performance.
Accompanying drawing explanation
Fig. 1 is one-piece construction block diagram of the present invention.
Fig. 2 is the circuit structure diagram of power supply processing unit of the present invention.
Fig. 3 is the circuit structure diagram of linear filtering processing unit of the present invention.
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 direct current power power-measuring system based on linearly filtering process of the present invention, by tested engine, water temperature temperature control unit, machine oil temperature control unit, fuel oil constant-temperature control module, Intelligent Fuel Consumption Instrument, torque sensor, electric DC dynamometer, DCS speed regulator, control module, power supply processing unit, electrical network, power analyzer, linear filtering processing unit and computer system 14 part composition.
During work, electric DC dynamometer is connected with tested engine by shaft coupling, and it is for loading tested engine.DCS speed regulator is then connected with electric DC dynamometer, and power supply processing unit and control module are then connected with DCS speed regulator respectively, and power supply processing unit is then also connected with electrical network.Wherein, electrical network is used for providing power supply to whole power-measuring system.Power supply processing unit is then for processing line voltage, its structure as shown in Figure 2, by transformer T, be arranged on telefault L1 and the telefault L2 on the former limit of transformer T, be arranged on the telefault L3 of transformer T secondary, the former limit circuit be simultaneously connected with telefault L2 with telefault L1, the current rectifying and wave filtering circuit be connected with former limit circuit output end and driving circuit, and the output circuit be connected with telefault L3 forms.
Described current rectifying and wave filtering circuit can be converted to smooth-going direct current line voltage, and it comprises diode rectifier U, resistance R1 and electric capacity C1.The positive pole of described electric capacity C1 is connected with the cathode output end of diode rectifier U after resistance R1, its minus earth, and two input poles of described diode rectifier U form input end, its cathode output end then ground connection of this power supply processing unit together; The positive pole of described electric capacity C1 is also connected with former limit circuit; The input end of described power supply processing unit is connected with electrical network.
Described driving circuit is by driving chip U1, triode VT1, field effect transistor MOS, positive pole is connected with the VREF pin of driving chip U1 after resistance R5, the electric capacity C4 of minus earth, positive pole is connected with the SS pin of driving chip U1, the electric capacity C3 that negative pole is then connected with the negative pole of electric capacity C4, be serially connected in the resistance R4 between the FB pin of driving chip U1 and the negative pole of electric capacity C4, positive pole is connected with the positive pole of electric capacity C1 after resistance R2, the electric capacity C5 of ground connection while negative pole is connected with the GND pin of driving chip U1, one end is connected with the OUT pin of driving chip U1, the resistance R6 that the other end is then connected with the grid of field effect transistor MOS, the diode D2 be in parallel with resistance R6, one end is connected with the source electrode of field effect transistor MOS, the resistance R7 of other end ground connection forms.
Meanwhile, the RVC pin of this driving chip U1 is connected with the positive pole of electric capacity C4, and its IS pin is then connected with the base stage of triode VT1, and its VCC pin is then connected with the positive pole of electric capacity C5; The described collector of triode VT1 is connected with the source electrode of field effect transistor MOS, its grounded emitter.The drain electrode of described field effect transistor MOS is then connected with former limit circuit.In order to reach better implementation result, described driving chip U1 preferentially selects FAN7554 integrated chip to realize.
Described former limit circuit comprises resistance R3, resistance R8, electric capacity C2, diode D1 and diode D3.During connection, the P pole of described diode D3 is connected with the drain electrode of field effect transistor MOS, its N pole is connected with the positive pole of electric capacity C1 after resistance R3, electric capacity C2 is then in parallel with resistance R3, and the N pole of diode D1 is connected with the positive pole of electric capacity C5, its P pole is then connected with the non-same polarity of telefault L2 after resistance R8.The Same Name of Ends of described telefault L1 is connected with the positive pole of electric capacity C1, its non-same polarity is then connected with the Same Name of Ends of telefault L2.The direct current exported from former limit circuit exports to output circuit after transformer T transformation.
Described output circuit comprises diode D4 and electric capacity C6.The output terminal that the P pole of described diode D4 is connected with the non-same polarity of telefault L3, its N pole then forms this power supply processing unit together with the Same Name of Ends of telefault L3; The output terminal of described power supply processing unit is connected with DCS speed regulator; The positive pole of described electric capacity C6 is connected with the Same Name of Ends of telefault L3, and its negative pole is then connected with the N pole of diode D4.
Further, the voltage after power supply processing unit processes flows to electric DC dynamometer after DCS speed regulator, and controlled the rotating speed of electric DC dynamometer by DCS speed regulator, electric DC dynamometer then drives tested engine operation.This electric DC dynamometer can also be converted to direct current the mechanical energy that tested engine transmits, the DC inverter that DCS speed regulator then can send electric dynamometer is that alternating current feeds back to electrical network for miscellaneous equipment, so then the present invention can be made to add energy-conservation.
In addition, water temperature temperature control unit, machine oil temperature control unit and fuel oil constant-temperature control module then form the protection system of tested engine, it is connected with tested engine, for protecting tested engine, it can make the water temperature of tested engine, machine oil and fuel oil maintain steady state value respectively; Meanwhile, water temperature temperature control unit, machine oil temperature control unit and fuel oil constant-temperature control module are controlled by computer system, and therefore they are also connected with computer system respectively.
Intelligent Fuel Consumption Instrument is then connected with tested engine and computer system respectively, and it for measuring the oil consumption of tested engine, and is transferred to computer system metrical information.Torque sensor is then connected with tested engine, and linear filtering processing unit is then connected with torque sensor, and power analyzer is then connected with linear filtering processing unit, and computer system is also connected with control module with power analyzer respectively.This torque sensor for gathering the torque signal of tested engine, and is transferred to linear filtering processing unit filtration undesired signal, and this torque sensor can be preferably strain-type torque sensor to realize.Power analyzer then calculates the output power of tested engine according to torque signal and is transferred to computer system, its WT3000 type power analyzer can preferentially selecting the dynamo-electric science and technology of Japanese Yokogawa to produce realizes, this model power analyzer data-handling capacity is powerful, corresponding speed fast, can well guarantee reliability and the promptness of test data.
More thorough in order to make linear filtering processing unit filter undesired signal, as shown in Figure 3, it is by filtering chip U2, amplifier P2 for the structure of this linear filtering processing unit, amplifier P1, triode VT2, resistance R9, resistance R10, resistance R11, electric capacity C7 and electric capacity C8 form.
During connection, the input end that one end of resistance R9 is connected with the IN pin of filtering chip U2, its other end then forms this linear filtering processing unit together with the CLK pin of filtering chip U2, resistance R10 is then serially connected between the IN pin of filtering chip U2 and the negative pole of amplifier P2, between the positive pole that electric capacity C7 is serially connected in amplifier P2 and output terminal, resistance R11 is serially connected between the OUT pin of filtering chip U2 and the negative pole of amplifier P1, and the negative pole of electric capacity C8 is connected with the output terminal of amplifier P2, its positive pole is then connected with the output terminal of amplifier P1.The OPIN pin of described filtering chip U2 is all connected with the positive pole of amplifier P1 with its OPOUT pin.The base stage of described triode VT2 is connected with output terminal with the positive pole of amplifier P2 respectively, its grounded emitter, and its collector then forms the output terminal of this linear filtering processing unit together with the output terminal of amplifier P1.The input end of this linear filtering processing unit is connected with torque sensor, its output terminal is then connected with power analyzer.In order to reach better implementation result, this filtering chip U2 then preferentially selects MAX291 integrated chip to realize.
Control module is then for control DCS speed regulator.Computer system is then as control center of the present invention and signal transacting center, and tester can be controlled power-measuring system by computer system, and understands the real-time status of tested engine, and therefore this computer system is also as the window of human-computer exchange.In addition, this water temperature temperature control unit, machine oil temperature control unit, fuel oil constant-temperature control module, Intelligent Fuel Consumption Instrument, electric DC dynamometer, DCS speed regulator and control module all adopt prior art to realize.
As mentioned above, just well the present invention can be implemented.
Claims (8)
1. the direct current power power-measuring system based on linearly filtering process, it is characterized in that, by tested engine, the water temperature temperature control unit be all connected with tested engine, machine oil temperature control unit, fuel oil constant-temperature control module, Intelligent Fuel Consumption Instrument and torque sensor, by the electric DC dynamometer that shaft coupling is connected with tested engine, the DCS speed regulator be connected with electric DC dynamometer, the control module be connected with DCS speed regulator respectively and power supply processing unit, the electrical network be connected with power supply processing unit, the linear filtering processing unit be connected with torque sensor, the power analyzer be connected with linear filtering processing unit, and respectively with water temperature temperature control unit, machine oil temperature control unit, fuel oil constant-temperature control module, Intelligent Fuel Consumption Instrument, the computer system composition that power analyzer is connected with control module, described linear filtering processing unit is by filtering chip U2, amplifier P2, amplifier P1, triode VT2, one end is connected with the IN pin of filtering chip U2, the other end then forms the resistance R9 of the input end of this linear filtering processing unit together with the CLK pin of filtering chip U2, be serially connected in the resistance R10 between the IN pin of filtering chip U2 and the negative pole of amplifier P2, be serially connected in the electric capacity C7 between the positive pole of amplifier P2 and output terminal, be serially connected in the resistance R11 between the OUT pin of filtering chip U2 and the negative pole of amplifier P1, and negative pole is connected with the output terminal of amplifier P2, the electric capacity C8 that positive pole is then connected with the output terminal of amplifier P1 forms, the OPIN pin of described filtering chip U2 is all connected with the positive pole of amplifier P1 with its OPOUT pin, the base stage of described triode VT2 is connected with output terminal with the positive pole of amplifier P2 respectively, its grounded emitter, and its collector then forms the output terminal of this linear filtering processing unit together with the output terminal of amplifier P1, the input end of described linear filtering processing unit is connected with torque sensor, its output terminal is then connected with power analyzer.
2. a kind of direct current power power-measuring system based on linearly filtering process according to claim 1, it is characterized in that: described power supply processing unit is by transformer T, be arranged on telefault L1 and the telefault L2 on the former limit of transformer T, be arranged on the telefault L3 of transformer T secondary, the former limit circuit be simultaneously connected with telefault L2 with telefault L1, the current rectifying and wave filtering circuit be connected with former limit circuit and driving circuit, and the output circuit be connected with telefault L3 forms.
3. a kind of direct current power power-measuring system based on linearly filtering process according to claim 2, is characterized in that: described current rectifying and wave filtering circuit comprises diode rectifier U, resistance R1 and electric capacity C1; The positive pole of described electric capacity C1 is connected with the cathode output end of diode rectifier U after resistance R1, its minus earth, and the input end of described diode rectifier U forms the input end of this power supply processing unit, its cathode output end then ground connection; The positive pole of described electric capacity C1 is also connected with former limit circuit; The input end of described power supply processing unit is connected with electrical network.
4. a kind of direct current power power-measuring system based on linearly filtering process according to claim 3, it is characterized in that: described driving circuit is by driving chip U1, triode VT1, field effect transistor MOS, positive pole is connected with the VREF pin of driving chip U1 after resistance R5, the electric capacity C4 of minus earth, positive pole is connected with the SS pin of driving chip U1, the electric capacity C3 that negative pole is then connected with the negative pole of electric capacity C4, be serially connected in the resistance R4 between the FB pin of driving chip U1 and the negative pole of electric capacity C4, positive pole is connected with the positive pole of electric capacity C1 after resistance R2, the electric capacity C5 of ground connection while negative pole is connected with the GND pin of driving chip U1, one end is connected with the OUT pin of driving chip U1, the resistance R6 that the other end is then connected with the grid of field effect transistor MOS, the diode D2 be in parallel with resistance R6, one end is connected with the source electrode of field effect transistor MOS, the resistance R7 of other end ground connection forms, the RVC pin of described driving chip U1 is connected with the positive pole of electric capacity C4, and its IS pin is then connected with the base stage of triode VT1, and its VCC pin is then connected with the positive pole of electric capacity C5, the described collector of triode VT1 is connected with the source electrode of field effect transistor MOS, its grounded emitter, the drain electrode of described field effect transistor MOS is then connected with former limit circuit.
5. a kind of direct current power power-measuring system based on linearly filtering process according to claim 4, is characterized in that: described former limit circuit comprises resistance R3, resistance R8, electric capacity C2, diode D1 and diode D3; The P pole of described diode D3 is connected with the drain electrode of field effect transistor MOS, its N pole is connected with the positive pole of electric capacity C1 after resistance R3, electric capacity C2 is then in parallel with resistance R3, and the N pole of diode D1 is connected with the positive pole of electric capacity C5, its P pole is then connected with the non-same polarity of telefault L2 after resistance R8; The Same Name of Ends of described telefault L1 is connected with the positive pole of electric capacity C1, its non-same polarity is then connected with the Same Name of Ends of telefault L2.
6. a kind of direct current power power-measuring system based on linearly filtering process according to claim 5, is characterized in that: described output circuit comprises diode D4 and electric capacity C6; The output terminal that the P pole of described diode D4 is connected with the non-same polarity of telefault L3, its N pole then forms this power supply processing unit together with the Same Name of Ends of telefault L3; The positive pole of described electric capacity C6 is connected with the Same Name of Ends of telefault L3, and its negative pole is then connected with the N pole of diode D4; The output terminal of described power supply processing unit is connected with DCS speed regulator.
7. a kind of direct current power power-measuring system based on linearly filtering process according to claim 6, is characterized in that: described driving chip U1 is FAN7554 integrated chip.
8. a kind of direct current power power-measuring system based on linearly filtering process according to any one of claim 1 ~ 6, is characterized in that: described filtering chip U2 is MAX291 integrated chip.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510818366.4A CN105300582A (en) | 2015-11-20 | 2015-11-20 | DC electric power power-measuring system based on signal linear filtering processing |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510818366.4A CN105300582A (en) | 2015-11-20 | 2015-11-20 | DC electric power power-measuring system based on signal linear filtering processing |
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| JPH06261577A (en) * | 1993-03-08 | 1994-09-16 | Meidensha Corp | Control circuit of dc machine |
| CN1290856A (en) * | 2000-11-09 | 2001-04-11 | 常柴股份有限公司 | Measurement of engine mechanical efficiency and back drawing test system |
| CN1338617A (en) * | 2000-08-11 | 2002-03-06 | 刘向群 | Virtual test system of permanent-magnet DC motor |
| CN1587937A (en) * | 2004-09-28 | 2005-03-02 | 十堰市海泱科技有限公司 | Direct current power ergometer and its control system |
| CN202405881U (en) * | 2011-10-14 | 2012-08-29 | 西北工业大学 | Super capacitor energy storing device |
-
2015
- 2015-11-20 CN CN201510818366.4A patent/CN105300582A/en not_active Withdrawn
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06261577A (en) * | 1993-03-08 | 1994-09-16 | Meidensha Corp | Control circuit of dc machine |
| CN1338617A (en) * | 2000-08-11 | 2002-03-06 | 刘向群 | Virtual test system of permanent-magnet DC motor |
| CN1290856A (en) * | 2000-11-09 | 2001-04-11 | 常柴股份有限公司 | Measurement of engine mechanical efficiency and back drawing test system |
| CN1587937A (en) * | 2004-09-28 | 2005-03-02 | 十堰市海泱科技有限公司 | Direct current power ergometer and its control system |
| CN202405881U (en) * | 2011-10-14 | 2012-08-29 | 西北工业大学 | Super capacitor energy storing device |
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Application publication date: 20160203 |