CN102564666A - Non-driving power measuring system for travelling machinery - Google Patents

Abstract

The utility model relates to a non-driving power measuring system for travelling machinery. The non-driving power measuring system for the travelling machinery mainly comprises m groups of hydraulic pump/motor power measuring sensors with the same structure and n groups of motor/generator power measuring sensors, wherein the m groups of the hydraulic pump/motor power measuring sensors with the same structure comprise pressure sensors, rotational speed sensors and rotational angle sensors which are used for detecting the pressure, the rotational speed and the rotational angle of a hydraulic pump/motor respectively, and m groups of plus-minus switches; the n groups of the motor/generator power measuring sensors comprise voltage sensors and current sensors which are used for detecting the voltage and the current of a motor/generator respectively, as well as n groups of plus-minus switches; and the detection signals of the m groups of the hydraulic pump/motor power measuring sensors and the n groups of the motor/generator power measuring sensors are input in a measuring unit through harnesses, after the signals of all the sensors are received through the measuring unit, the power calculation is carried out according to the states of the m groups of the plus-minus switches or the n groups of the plus-minus switches and the algorithm of internal storage, and the results are sent to a display device for display through harnesses. The common sensors are adopted, therefore, the non-driving power measuring system for the travelling machinery has the advantages of high applicability, wide application range, simplicity and convenience in measurement, no big structural change in the original travelling machinery and the like.

Description

The non-road horsepower measuring system of a kind of walking machine

Technical field

The present invention relates to the non-road horsepower measuring system of a kind of walking machine, be applicable to the fields such as power circuit measurement, Energy Saving Control, power match test of walking machine, this technology also can be extended to the monitoring of boats and ships, aircraft constant power stream.

Background technology

In the design process of walking machines such as automobile, engineering machinery, agricultural machinery, army's construction machinery, robot, need to measure power, non-road horsepower and the ratio thereof that is used to go usually, calculate to carry out power match better.When these machineries are carried out Energy Saving Control, also need understand its detailed power circuit situation.General walking machine is estimated its power circuit situation according to its principle of work and power when initial design usually, designs model machine just according to this.But after just model machine is worked it out, must be through the power circuit situation of the first model machine of experimental measurement, so that initial design is improved.

Aforesaid walking machine, its engine was all demarcated before dispatching from the factory, and in throttle position and output speed one timing, its output power can obtain through the match of tabling look-up.If engine capacity all is used for walking, the power of its walking is exactly the output power of engine so, does not need monitoring.But mostly general walking machine be while the operation of walking, and it is of a great variety to be used for the executive component of operation, the present good without comparison measuring method of the instantaneous measurement of road horsepower, non-road horsepower and ratio thereof.

Summary of the invention

The technical matters that the present invention solves is: common its walking drives and adopts mechanical drive in view of general walking machine; Directly measure its road horsepower and need use force transducer or torque sensor; And need carry out necessary change to the structure of power train, measure very trouble.The present invention proposes a kind of method of measuring non-road horsepower for this reason.Use after this method, the not only non-transient power that goes can obtain measuring, and in conjunction with the family curve of the engine of demarcating, its road horsepower also can calculate with comparalive ease.

Technical scheme accompanying drawings of the present invention is following:

The non-road horsepower measuring system of a kind of walking machine; Mainly form by measuring unit, display device and sensor; Said sensor is made up of with the identical motor/generator power measurement sensor groups of n group structure the identical hydraulic pump/motor power measurement sensor groups of m group structure, and said m group hydraulic pump/motor power measurement sensor groups comprises that being respectively applied for the pressure transducer, speed probe, rotary angle transmitter and the m that detect hydraulic pump/motor pressure, rotating speed, corner organizes the plus-minus switch; Said n group motor/generator power measurement sensor groups comprises that being respectively applied for the voltage sensor, current sensor and the n group that detect motor/generator voltage, electric current adds and subtracts switch; The detection signal of said m group and n group sensor groups is through wire harness input measurement unit 1; Receive the signal of each sensor through measuring unit 1 after; Carry out power calculation, and send display device 2 to show through wire harness the result according to m group plus-minus switch or the state of n group plus-minus switch, the algorithm of internal reservoir.

Said m group hydraulic pump/motor power measurement sensor groups and said n group motor/generator power measurement sensor groups are according to the complexity selection group number and the kind of system under test (SUT).

Said m group plus-minus switch, n group plus-minus switch are connected with measuring unit 1 through wire harness, and it gives measuring unit 1 according to the flow direction output various signals of measured dynamical element output power, are used for when the non-road horsepower of accumulative total, getting plus sige or minus sign.

When said walking machine is the Work machine of hybrid power system driving; Its non-transient power measurement of going comprises hydraulic system and/or electric system; The non-transient power that goes of hydraulic system uses two groups of hydraulic pump/motor survey sensor groups to measure; The non-transient power that goes of electric system uses two groups of motor/generator power measurement sensor groups to measure; The power that the non-transient power that goes of hydraulic system is a fixed displacement pump 24 deducts the power of variable displacement motor 27, and the power that the non-transient power that goes of electric system is a generator 32 deducts the power of motor 36, and then the total non-road horsepower of this walking machine is: the non-transient power N that goes of hydraulic system _PNon-road horsepower N with electric system _VSum.

Said fixed displacement pump 24 transient powers are measured and are used first pressure transducer 3, first speed probe 4, first rotary angle transmitter 5 and the m group first plus-minus switch 6; Because hydraulic pump is a fixed displacement pump; First rotary angle transmitter 5 that is used to survey the variable output pump corner is arranged on the position of corner for " 0 "; The m group first plus-minus switch 6 places the position of " opening ", uses plus sige during representative accumulative total; Said variable displacement motor 27 transient powers are measured and are used m pressure transducer 8, m speed probe 9, m rotary angle transmitter 10 and m plus-minus switch 11, and wherein m plus-minus switch 11 places the position of " closing ", uses minus sign during representative accumulative total; Measuring unit 1 receives pressure signal, tach signal, the angular signal of each sensor, and according to the state of m group first plus-minus switch 6 and m plus-minus switch 11, the algorithm of its internal reservoir carries out the non-road horsepower N of hydraulic system _PCalculate, computing formula is following:

$N_P=\frac{2\mathrm{n\&pi;}}{60}[\frac{q_{24}{\mathrm{<figure-callout\; id="24"\; label="P"\; filenames="HDA0000138368740000021.png"\; state="\{\{state\}\}">P</figure-callout>}}_{24}}{{\mathrm{\&eta;}}_{24}}-\frac{q_{27}\left(\mathrm{\&gamma;}\right){\mathrm{<figure-callout\; id="27"\; label="P"\; filenames="HDA0000138368740000021.png"\; state="\{\{state\}\}">P</figure-callout>}}_{27}}{{\mathrm{\&eta;}}_{24-27}{\mathrm{\&eta;}}_{27}}]---\left(1\right)$

Q in the formula ₂₄, q ₂₇Be the discharge capacity of fixed displacement pump 24 and variable displacement motor 27 (γ), wherein the latter is the function of its variable angle γ, can after demarcating match, draw P ₂₄, P ₂₇Be the output pressure of 27 of fixed displacement pump 24 and variable displacement motors, η ₂₄, η ₂₇, η _24-27Be fixed displacement pump send out 24 with the transmission efficiency of variable displacement motor 27 and from fixed displacement pump 24 to variable displacement motor 27 transmission efficiency, n is a fixed displacement pump 24 and the rotating speed of variable displacement motor 27,60 is constants.

Said generator 32 transient powers are measured and are used first voltage sensor 13, first current sensor 14 and the n group first plus-minus switch 15, and wherein the n group first plus-minus switch 15 is placed in the position of " opening ", uses plus sige during representative accumulative total; Said motor 36 transient powers are measured, and use n voltage sensor 17, n current sensor 18 and n plus-minus switch 19, and wherein n plus-minus switch 19 places the position of " closing ", uses minus sign during representative accumulative total; Measuring unit 1 receives voltage signal, the current signal of each sensor, and according to the state of n group first plus-minus switch 15 and n plus-minus switch 19, the algorithm of its internal reservoir carries out the non-road horsepower N of hydraulic system _PCalculate, computing formula is following:

$N_V=\frac{V_{32}{\mathrm{<figure-callout\; id="32"\; label="I"\; filenames="HDA0000138368740000021.png"\; state="\{\{state\}\}">I</figure-callout>}}_{32}}{{\mathrm{\&eta;}}_{32}}-\frac{V_{32}{\mathrm{<figure-callout\; id="36"\; label="I"\; filenames="HDA0000138368740000021.png"\; state="\{\{state\}\}">I</figure-callout>}}_{36}}{{\mathrm{\&eta;}}_{32-36}{\mathrm{\&eta;}}_{36}}---\left(2\right)$

I in the formula ₃₂, I ₃₆Be the electric current of generator 32 and motor 36, V ₃₂, V ₃₆Be the output voltage of generator 32 and motor 36, η ₃₂, η ₃₆, η _32-36 Be generator 32 with the transmission efficiency of motor 36 and from generator 32 to motor 36 transmission efficiency.

This invents employed sensor all is common sensor; It is strong to have applicability; Measure easy; Former walking machine is not carried out big advantages such as structural modification, can select the group number and the kind of hydraulic pump/motor survey sensor group or motor/generator power measurement sensor groups voluntarily, therefore applicable to fields such as the road horsepower of various walking machines and non-road horsepower transient measurement, Energy Saving Control, power match tests according to the configuration of former car.This technology also can be extended to the monitoring of boats and ships, aircraft constant power stream.

Description of drawings

Fig. 1 is the non-road horsepower measuring system of a walking machine structural representation

Fig. 2 is the synoptic diagram with the non-road horsepower of non-road horsepower measuring system certain type walking machine of test

Among the figure: 1 measuring unit, 2 display device, 3 first pressure transducers, 8m pressure transducer, 4, first speed probe, 9m speed probe; 5 first rotary angle transmitters, 10 m rotary angle transmitters, 6 m group, the first plus-minus switch, 11 m add and subtract switch, 7 wire harness I, 12 wire harness II; 13 first voltage sensors, 17 n voltage sensors, 14 first current sensors, 18 n current sensors, 15 n group, the first plus-minus switch; 19 n add and subtract switch, 16 wire harness III, 20 wire harness IV, 21 engines, 22 driven wheels, 23 fixed displacement pump gears; 24 fixed displacement pumps, 25 guiding valves, 26 oil cylinders, 27 variable displacement motors, 28 sun gears, 29 planetary gears, 30 planet carriers; 31 generator gears, 32 generators, 33 operation electrical equipment, 34 accumulators, 35 motor drivers, 36 motor; 37 motor gears, 38 gear rings, 39 gear ring detents, 40 sun gear detents, 41 wheels.

Embodiment

Further specify concrete containing of the present invention and embodiment below in conjunction with the accompanying drawing illustrated embodiment.

The present invention has designed a kind of non-road horsepower measuring system that is used for walking machine, and it asks non-road horsepower through measuring the transient power of kinematic train medium power element through the mode of add up (or subtracting).Use the simple sensors group, measure the transient power of motor/generator power and hydraulic pump/motor, thereby measure the road horsepower and the non-road horsepower of walking machine, the digit basis of necessity is provided for accurately carrying out power match, Energy Saving Control.

The non-road horsepower measuring system of a kind of walking machine of the present invention; Said sensor is made up of with the identical motor/generator power measurement sensor groups of n group structure the identical hydraulic pump/motor power measurement sensor groups of m group structure; Mainly form by measuring unit, display device and sensor; Hydraulic pump/motor survey sensor group is used for measurand or the quantitative hydraulic pump and the transient power of oil motor, and it is made up of first pressure transducer 3 (or m pressure transducer 8), first speed probe 4 (or m speed probe 9), first rotary angle transmitter 5 (or m rotary angle transmitter 10), the m group first plus-minus switch 6 (or m plus-minus switch 11), wire harness I 7 (or wire harness II 12).Motor/generator power measurement sensor groups is used to measure the power of motor 36 or generator 32, and it is made up of first voltage sensor 13 (or n voltage sensor 17), first current sensor 14 (or n current sensor 18), the n group first plus-minus switch 15 (or n plus-minus switch 19), wire harness III 16 (or wire harness IV 20).Plus-minus switch in the two sensors passes various signals back for measuring unit 1 according to the flow direction of the output power of measured dynamical element, is used for when this dynamical element power of accumulative total, getting plus sige or getting minus sign.Receive the signal of each sensor through measuring unit 1 after, carry out power calculation, and send display device 2 to show through wire harness the result according to m group plus-minus switch or the state of n group plus-minus switch, the algorithm of internal reservoir.

Said m group hydraulic pump/motor power measurement sensor groups and said n group motor/generator power measurement sensor groups are according to the complexity selection group number and the kind of system under test (SUT).

Said m group plus-minus switch, n group plus-minus switch are connected with measuring unit 1 through wire harness, and it gives measuring unit 1 according to the flow direction output various signals of measured dynamical element output power, are used for when the non-road horsepower of accumulative total, getting plus sige or minus sign.

Consult Fig. 2, the walking machine that is used to measure non-road horsepower is a kind of Work machine that is driven by hybrid power system, the power of its engine be separately converted to electric energy and hydraulic pressure can, two kinds of energy are arranged through a planet and are converged the rear drive wheel and go.Its electric energy and hydraulic pressure can also drive electric equipment and the hydraulic actuator that is used for operation except that driving walking.

Hydraulic circuit is that driven wheel 22 drives a fixed displacement pump 24 with fixed displacement pump gear 23 by engine 21 through gear pair; Connect 26 operations of guiding valve 25 driving oil cylinder; Also drive every trade star row's sun gear 28, drive planet row drive wheels 41 and go through variable displacement motor 27.

Electrical circuit is that driven wheel 22 drives 32 generatings of a generator with generator gear 31 by engine 21 through gear pair; Drive operation electrical equipment 33; And be accumulator 34 chargings; Also through motor driver 35 driving motors 36, drive the gear ring 38 that planet is arranged through motor gear 37, drive wheels 41 is gone.

This walking machine can combination drive by electric energy and hydraulic pressure, but also can only use a kind of power.If when only wanting to use hydraulic pressure can drive walking, can be through gear ring 38 brakings of gear ring detent 39 with planet row.Another kind of situation if only want to use electric energy to drive when walking, can use sun gear detent 40 with sun gear 28 brakings.

For measuring the instantaneous non-road horsepower of this walking machine, use two groups of motor/generator power measurement sensor groups and two groups of hydraulic pump/motor survey sensor groups to accomplish test job respectively.

(1) measurement of the non-transient power that goes of hydraulic system.The non-walking power of hydraulic system is the power that the power of fixed displacement pump 24 deducts variable displacement motor 27, need measure the transient power of fixed displacement pump 24 and variable displacement motor 27 for this reason.First pressure transducer, 3, the first speed probes, 4, the first rotary angle transmitters 5 have been used in the measurement of fixed displacement pump 24 power, the m group first plus-minus switch 6.Because of hydraulic pump is a fixed displacement pump, be set at the position of corner for " 0 " so survey first rotary angle transmitter 5 of variable output pump corner.In addition, the m group first plus-minus switch 6 places the position of " opening ", uses plus sige during representative accumulative total.For variable displacement motor 27, used m pressure transducer 8, m speed probe 9, m rotary angle transmitter 10, m adds and subtracts switch 11, and wherein m plus-minus switch 11 places the position of " closing ", uses minus sign during representative accumulative total.The non-road horsepower N of hydraulic system then _PComputing formula is following:

$N_P=\frac{2\mathrm{n\&pi;}}{60}[\frac{q_{24}{\mathrm{<figure-callout\; id="24"\; label="P"\; filenames="HDA0000138368740000021.png"\; state="\{\{state\}\}">P</figure-callout>}}_{24}}{{\mathrm{\&eta;}}_{24}}-\frac{q_{27}\left(\mathrm{\&gamma;}\right){\mathrm{<figure-callout\; id="27"\; label="P"\; filenames="HDA0000138368740000021.png"\; state="\{\{state\}\}">P</figure-callout>}}_{27}}{{\mathrm{\&eta;}}_{24-27}{\mathrm{\&eta;}}_{27}}]---\left(1\right)$

Q in the formula ₂₄, q ₂₇Be the discharge capacity of fixed displacement pump 24 and variable displacement motor 27 (γ), wherein the latter is the function of its variable angle γ, can after demarcating match, draw.P ₂₄, P ₂₇It is the output pressure of fixed displacement pump 24, variable displacement motor 27.η ₂₄, η ₂₇, η _24-27Be the transmission efficiency of fixed displacement pump 24, variable displacement motor 27 and from fixed displacement pump 24 to variable displacement motor 27 transmission efficiency.N is the rotating speed of fixed displacement pump 24 and variable displacement motor 27, and 60 is constants.

(2) measurement of the non-walking transient power of electric system.The non-walking power of electric system is the power that the power of generator 32 deducts motor 36, need measure the transient power of generator 32 and motor 36 for this reason.First voltage sensor, 13, the first current sensors 14 have been used in the measurement of generator 32 power, the n group first plus-minus switch 15.Wherein the n group first plus-minus switch 15 is placed in the position of " opening ", uses plus sige during representative accumulative total.For motor 36, used n voltage sensor 17, n current sensor 18, n adds and subtracts switch 19.Wherein n plus-minus switch 19 places the position of " closing ", uses minus sign during representative accumulative total.The non-road horsepower N of electric system then _VComputing formula is following:

$N_V=\frac{V_{32}{\mathrm{<figure-callout\; id="32"\; label="I"\; filenames="HDA0000138368740000021.png"\; state="\{\{state\}\}">I</figure-callout>}}_{32}}{{\mathrm{\&eta;}}_{32}}-\frac{V_{36}{\mathrm{<figure-callout\; id="36"\; label="I"\; filenames="HDA0000138368740000021.png"\; state="\{\{state\}\}">I</figure-callout>}}_{36}}{{\mathrm{\&eta;}}_{32-36}{\mathrm{\&eta;}}_{36}}---\left(2\right)$

I in the formula ₃₂, I ₃₆Be the electric current of generator 32 and motor 36, V ₃₂, V ₃₆It is the output voltage of generator 32 and motor 36.η ₃₂, η ₃₆, η _32-36Be the transmission efficiency of generator 32, motor 36 and from generator 32 to motor 36 transmission efficiency.

Then the total non-road horsepower of this walking machine is:

N＝N _P+N _V (3)

Claims (6)

1. non-road horsepower measuring system of walking machine; Mainly form by measuring unit, display device and sensor; It is characterized in that; Said sensor is made up of with the identical motor/generator power measurement sensor groups of n group structure the identical hydraulic pump/motor power measurement sensor groups of m group structure, and said m group hydraulic pump/motor power measurement sensor groups comprises that being respectively applied for the pressure transducer, speed probe, rotary angle transmitter and the m that detect hydraulic pump/motor pressure, rotating speed, corner organizes the plus-minus switch; Said n group motor/generator power measurement sensor groups comprises that being respectively applied for the voltage sensor, current sensor and the n group that detect motor/generator voltage, electric current adds and subtracts switch; The detection signal of said m group and n group sensor groups is through wire harness input measurement unit (1); After measuring unit (1) receives the signal of each sensor; Carry out power calculation, and send display device (2) to show through wire harness the result according to m group plus-minus switch or the state of n group plus-minus switch, the algorithm of internal reservoir.

2. the non-road horsepower measuring system of a kind of walking machine according to claim 1; It is characterized in that said m group hydraulic pump/motor power measurement sensor groups and said n group motor/generator power measurement sensor groups are according to the complexity selection group number and the kind of system under test (SUT).

3. the non-road horsepower measuring system of a kind of walking machine according to claim 1; It is characterized in that; Said m group plus-minus switch, n group plus-minus switch are connected with measuring unit (1) through wire harness; It gives measuring unit (1) according to the flow direction output various signals of measured dynamical element output power, is used for when the non-road horsepower of accumulative total, getting plus sige or minus sign.

4. the non-road horsepower measuring system of a kind of walking machine according to claim 1; It is characterized in that; When said walking machine is the Work machine of hybrid power system driving; Its non-transient power measurement of going comprises hydraulic system and/or electric system; The non-transient power that goes of hydraulic system uses two groups of hydraulic pump/motor survey sensor groups to measure, and the non-transient power that goes of electric system uses two groups of motor/generator power measurement sensor groups to measure, and the non-transient power that goes of hydraulic system is the power that the power of fixed displacement pump (24) deducts variable displacement motor (27); The non-transient power that goes of electric system is the power that the power of generator (32) deducts motor (36), and then the total non-road horsepower of this walking machine is: the non-transient power N that goes of hydraulic system _PNon-road horsepower N with electric system _VSum.

5. the non-road horsepower measuring system of a kind of walking machine according to claim 4; It is characterized in that; Said fixed displacement pump (24) transient power is measured and is used first pressure transducer (3), first speed probe (4), first rotary angle transmitter (5) and the m group first plus-minus switch (6); Because hydraulic pump is a fixed displacement pump; First rotary angle transmitter (5) that is used to survey the variable output pump corner is arranged on the position of corner for " 0 ", and the m group first plus-minus switch (6) places the position of " opening ", uses plus sige during representative accumulative total; Said variable displacement motor (27) transient power is measured and is used m pressure transducer (8), m speed probe (9), m rotary angle transmitter (10) and m plus-minus switch (11), and wherein m plus-minus switch (11) places the position of " closing ", uses minus sign during representative accumulative total; Measuring unit (1) receives pressure signal, tach signal, the angular signal of each sensor, and according to the state of the m plus-minus switch (11) and the first plus-minus switch (6), the algorithm of its internal reservoir carries out the non-road horsepower N of hydraulic system _PCalculate, computing formula is following:

$N_P=\frac{2\mathrm{n\&pi;}}{60}[\frac{q_{24}{P}_{24}}{{\mathrm{\&eta;}}_{24}}-\frac{q_{27}\left(\mathrm{\&gamma;}\right)P_{27}}{{\mathrm{\&eta;}}_{24-27}{\mathrm{\&eta;}}_{27}}]$

Q in the formula ₂₄, q ₂₇Be the discharge capacity of fixed displacement pump (24) and variable displacement motor (27) (γ), wherein the latter is the function of its variable angle γ, can after demarcating match, draw P ₂₄, P ₂₇Be the output pressure of fixed displacement pump (24) and variable displacement motor (27), η ₂₄, η ₂₇, η _24-27Be fixed displacement pump (24) and the transmission efficiency of variable displacement motor (27) and the transmission efficiency from fixed displacement pump (24) to variable displacement motor (27), n is the rotating speed of fixed displacement pump (24) and variable displacement motor (27), and 60 is constants.

6. the non-road horsepower measuring system of a kind of walking machine according to claim 4; It is characterized in that; Said generator (32) transient power is measured and is used first voltage sensor (13), first current sensor (14) and the n group first plus-minus switch (15); Wherein the n group first plus-minus switch (15) is placed in the position of " opening ", uses plus sige during representative accumulative total; Said motor (36) transient power is measured, and uses n voltage sensor (17), n current sensor (18) and n plus-minus switch (19), and wherein n plus-minus switch (19) places the position of " closing ", uses minus sign, the then non-road horsepower N of electric system during representative accumulative total _VComputing formula is following:

Measuring unit (1) receives voltage signal, the current signal of each sensor, and according to the state of n group first plus-minus switch (15) and n plus-minus switch (19), the algorithm of its internal reservoir carries out the non-road horsepower N of hydraulic system _PCalculate, computing formula is following:

$N_V=\frac{V_{32}{I}_{32}}{{\mathrm{\&eta;}}_{32}}-\frac{V_{36}{I}_{36}}{{\mathrm{\&eta;}}_{32-36}{\mathrm{\&eta;}}_{36}}$

I in the formula ₃₂, I ₃₆Be the electric current of generator (32) and motor (36), V ₃₂, V ₃₆Be the output voltage of generator (32) and motor (36), η ₃₂, η ₃₆, η _32-36Be generator (32) and the transmission efficiency of motor (36) and transmission efficiency from generator (32) to motor (36).

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