CN205592228U - Portable multi -functional hydraulic control valve failure diagnosis test instrument of intelligence - Google Patents

Abstract

The utility model relates to a portable multi -functional hydraulic control valve failure diagnosis test instrument of intelligence, include shell, demonstration and the control unit, interface and pacify cased first circuit board, second Circuit Board, install rechargeable lithium -ion battery, power switching over unit and PWM power output unit on the first circuit board, installation a central processing unit and output signal automatic switch -over unit, the feedback signal automatic acquisition unit be connected with a central processing unit IO respectively on second Circuit Board. The utility model discloses a centralized control system, the integrative portable multi -functional hydraulic control valve failure diagnosis test instrument of intelligence of test, exportable 0 10v, 4 20ma, 0 10ma, 0 10v and 0 2A's pulsewidth modulation (PWM) signal, to the servovalve, proportional valve and the control of ordinary switching -over valve homoenergetic, simultaneously can gather the servovalve, the spool displacement and the hydraulic control valve output A of proportional valve, the pressure in B chamber, and show with instrument or curved form on the screen, surveyability.

Description

Intelligent portable multifunctional hydraulic control valve Fault Diagnosis Testing Instrument device

Technical field

This utility model belongs to the fields such as the breakdown judge of hydraulic control system, performance test and maintenance, especially A kind of intelligent portable multifunctional hydraulic control valve Fault Diagnosis Testing Instrument device.

Background technology

At modern industry, metallurgy and machine industry, the application of hydraulic system widely, especially in the modern times The production line changed, hydraulic control system is tightly combined with mechanical action and electric control system, comprises hydraulic control Equipment once break down, it is mechanical breakdown, hydraulic control system fault or electricity that maintainer is difficult to judgement The gas control system failure, also in the market hydraulic control valve brand differ, model numerous, the most both at home and abroad Only have and control instrument or test instrunment.But, there is no the tester that the miniaturization that combines is portable not yet Multiple hydraulic control valve can be measured.

Utility model content

In place of the purpose of this utility model is to overcome the deficiencies in the prior art, it is provided that a kind of use side of carrying flexibly Just, the hydraulic control valve in market more than 90% can be carried out the instrument of breakdown judge and performance test.

This utility model solves technical problem and be the technical scheme is that

A kind of intelligent portable multifunctional hydraulic control valve Fault Diagnosis Testing Instrument device, including shell, shows and control Unit processed, interface and install first circuit board in the enclosure, second circuit board, the end face at shell is installed aobvious Showing and control unit, the sidewall at shell is installed and is externally tested output interface, signals collecting input interface and pulsewidth Modulation (PWM) signal output interface, installs charged lithium cells, power conversion unit and arteries and veins on first circuit board Wide modulation (PWM) power amplification unit, this pulse-width modulation PWM power amplification unit by second circuit board with Pulse-width modulation PWM signal output interface connects；On the second circuit board install CPU and respectively with The output signal automatic switch unit of CPU I/O connection, the automatic collecting unit of feedback signal, output Signal automatic switch unit is connected with externally test output interface I/O, the automatic collecting unit of feedback signal and signal Gather and input interface I/O connects, and CPU output connects display and control unit, and charged lithium cells leads to Crossing power transfer module to be connected with CPU, charged lithium cells is also respectively connected with externally tests output interface And signals collecting input interface.

And, the circuit of described output signal automatic switch unit includes that central processing element U1, digital-to-analogue turn Change chip U2, reference voltage chip U3 and analog quantity amplification chip U4, inside analog quantity amplification chip U4 There are 4 groups of amplifiers, respectively U4:A, U4:B, U4:C, U4:D, the outfan of analog-digital chip U2 Connected the input of amplifier U4:C by resistance, the outfan of amplifier U4:C connects amplification by resistance The input of device U4:B, the outfan of amplifier U4:B connects adjustable constant-flow source module, this tabilized current power supply Module includes amplifier U4:A, amplifier U4:D, audion Q9, audion Q10 and sampling resistor R19, The input of amplifier U4:A connects measures binding post D, is measuring binding post D and is measuring binding post Connect relay R L2 between E, measure binding post E and connect benchmark voltage chips U3, at reference voltage core Relay R L2, analog-digital chip U2 it is connected between the outfan of sheet U3 and the input of amplifier U4:B It is used for producing the analog quantity output signals of 0-4v；5v reference voltage chip U3 provides to analog-digital chip U2 Accurate+2v benchmark, makes U2 produce 0-4v analog signals accurately；Analog quantity amplification chip U4 is wherein U4:C as sign-changing amplifier, U4:B functions only as phase inverter when 4-20ma exports, at 0-± 10ma Due to the Guan Bi of relay R L1 during output, U4:B is adder here；U4:A and U4:D and audion Q9, Q10 and sample resistance R19 etc. form tabilized current power supply；Relay R L2 is used for switching 0-± 10ma With the output signal of 0-± 10v, measure binding post D, E and be used for connecting proportioning valve to be measured or servo valve.

And, described output signal automatic switch unit control the signal of switching include 0-± 10v, 4-20ma, 0-± 10ma, 0-10v and with enable the 0-± 10v of signal, 4-20ma.

And, the automatic collecting unit of described feedback signal gathers proportioning valve, valve core of servo valve displacement signal and pressure The signal of force transducer, is shown with the form of instrument or curve by display and control unit.

And, the circuit of the automatic collecting unit of described feedback signal includes central processing element U1, relay RL3, relay R L4, Simulation scale-up chip U9, reference voltage chip U7,2.5v reference voltage chip U7 provides 2.5v reference voltage for Simulation scale-up chip U9；Four groups of amplifications are had inside Simulation scale-up chip U9 Device, wherein 0-± 10v voltage of feedback is converted to the 0-5v born by amplifier U9:A, then through reversely putting Big device U9:D is converted into positive 0-5v and processes to central processing element, and relay R L3, RL4 are used for switching Feedback 0-± 10v, 4-20ma, 0-± 10ma, 0-10v signal, relay R L3, RL4 respectively with in Centre processes chip U1 and connects, and resistance R26 connects the input of amplifier U9:A, and amplifier U9:A's is defeated Going out the input that end connects sign-changing amplifier U9:D by resistance, the outfan of sign-changing amplifier U9:D connects Central processing element U1.

And, described externally test output interface uses 6 core aviation plugs, described signals collecting input to connect Mouth uses 4 core aviation plugs.

And, described charged lithium cells is 24v3000ma/h chargeable lithium battery group, band charging and overcurrent protection Circuit, is equipped with the constant current charger of pressure limiting 25.2v simultaneously.

And, described display uses serial ports touch screen with control unit.

And, described central processing unit CPU uses STC single-chip microcomputer.

Advantage of the present utility model and good effect be:

1, this utility model uses advanced design concept, in conjunction with the experience of a large amount of field failure judge processs, The hydraulic control valve in market more than 90% can be carried out breakdown judge and performance test.

2, power supply needed for this utility model carries hydraulic control valve, uses the most easy to carry, uses advanced person's Touch screen technology, full Chinese display and built-in description, simple to operate, easy-to-understand, easy to learn.

3, the exportable 0-± 10v of this utility model, the pulsewidth of 4-20ma, 0-± 10ma, 0-10v and 0-2A are adjusted System (PWM) signal, all can control servo valve, proportioning valve and common reversal valve, while can gather servo valve, The spool displacement of proportioning valve and the pressure in hydraulic control valve output A, B chamber, and with instrument or song on screen The form of line shows, very clear.

4, chargeable lithium cell group, power conversion unit are amplified by this utility model with the power output of PWM Unit is arranged on same circuit board, reduces the interference to CPU；CPU, output Signal automatic switch unit, feedback signal collecting unit and touch screen communication are arranged on another block circuit board, just In debugging and upgrading in the future；Touch screen is arranged on front, handling, visual good.Shell uses aluminium alloy Section bar, good heat dissipation, anti-interference.

5, in order to more accurately judge fault and the performance test of hydraulic valve to be measured, this utility model passes through feedback letter Number collecting unit gathers output signal, hydraulic valve spool displacement signal and the side of hydraulic valve output oil port pressure simultaneously Method, display is on screen in time, it is simple to user failure judgement, understands the characteristic of hydraulic valve in time.

Accompanying drawing explanation

Fig. 1 is structural representation of the present utility model；

Fig. 2 is circuit block diagram of the present utility model；

Fig. 3 is that output signal automatic switch unit is connected block diagram with the various control signals of output；

Fig. 4 is the circuit diagram of output signal automatic switch unit；

Fig. 5 is common without amplification board proportioning valve drive circuit figure；

Fig. 6 is the circuit diagram of the automatic collecting unit of feedback signal；

Fig. 7 is the connection block diagram of the automatic collecting unit of feedback signal and each input signal；

Fig. 8 is use scheme of installation of the present utility model；

Fig. 9 is overall control block diagram of the present utility model.

Detailed description of the invention

The utility model is described in further detail below in conjunction with the accompanying drawings and by specific embodiment, and following example are only It is illustrative, is not determinate, it is impossible to limit protection domain of the present utility model with this.

A kind of intelligent portable multifunctional hydraulic control valve Fault Diagnosis Testing Instrument device, including shell the 1, first electricity Road plate 5, second circuit board 7, display and control unit 6 and interface, as it is shown in figure 1, described shell is for long Cube shape, in end face installation display and the control unit of shell, the sidewall at shell is installed externally test output and is connect Mouth 10, signals collecting input interface 9 and 0-2A pulsewidth modulation (PWM) output interface 8.Pacify in the enclosure Dress first circuit board and second circuit board.First circuit board is installed charged lithium cells group 3, Power convert list Unit 2 and 0-2A pulsewidth modulation (PWM) amplifying unit 4, this 0-2A pulsewidth modulation (PWM) is amplified single Unit is connected with 0-2A pulsewidth modulation (PWM) output interface 8 by second piece of circuit board；At second circuit board Upper installation CPU and the output signal automatic switch unit being connected with CPU I/O respectively, The automatic collecting unit of feedback signal, output signal automatic switch unit is connected with externally test output interface I/O, The automatic collecting unit of feedback signal is connected with signals collecting input interface I/O.CPU output connects aobvious Show and control unit.Chargeable lithium cell group is connected with CPU, for central authorities by power transfer module Processing unit is powered.Meanwhile, chargeable lithium cell is also respectively connected with external test output interface and signals collecting is defeated Incoming interface, is that hydraulic valve to be measured is powered by interface.As shown in Figure 2.

Described externally test output interface uses 6 core aviation plugs, described signals collecting input interface to use 4 core aviation plugs.

Needed for output signal automatic switch unit coordinates CPU to be used for exporting various proportioning valve, servo valve Control signal, be connected to hydraulic valve to be tested by 6 core aviation plugs；Meet different brands and different shaped Number hydraulic control valve breakdown judge and testing requirement.As shown in Figure 3.

By to the hydraulic control valve brand on market, model analysis, output signal the most of the present utility model It is set to following 7 kinds:

1, without enable signal 0-± 10v, can with the voltage-type percentage of import reversal valve of the built-in amplification board of calibration tape, The such as 4WRTE16V1-200L-4X/6EG24K31/A1M of Germany's BOSCH-REXROTH；

2, without enabling the 4-20ma of signal, can with the current mode proportional reversing valve of the built-in amplification board of calibration tape, than 4WRTE16V1-200L-4X/6EG24K31/F1M such as Germany's BOSCH-REXROTH；

3, band enable signal 0-± 10v, can with the voltage-type percentage of import reversal valve of the built-in amplification board of calibration tape, The 4WRDE16V125L-5X/6L24K9/MR of such as BOSCH-REXROTH；

4, band enable signal 4-20ma, can with the current mode percentage of import flow valve of the built-in amplification board of calibration tape, The FESE 40CA-3X/450LK0G1M of such as BOSCH-REXROTH；

5,0-± 10ma signal can be with the D791 of the servo valve of the built-in amplification board of calibration tape, such as MOOG；

6, the signal of 0-10Vv can test proportional pressure control valve and the proportional pressure-reducing valve of the built-in amplification board of various band；

7, the high-power output of the PWM of 0-2A can directly drive the proportioning valve without amplification board and common electricity Magnetic reversal valve；

Above signal user only needs to set to hydraulic valve desired signal to be measured on the touchscreen, this utility model Central processing unit controls output signal automatic switch unit automatically switch, convenient and swift.

The circuit of described output signal automatic switch unit as shown in Figure 4, including central processing element U1, Analog-digital chip U2, reference voltage chip U3 and analog quantity amplification chip U4, analog quantity amplification chip 4 groups of amplifiers, respectively U4:A, U4:B, U4:C, U4:D, analog-digital chip U2 is had inside U4 Outfan by resistance R13 connect amplifier U4:C input, the outfan of amplifier U4:C passes through Resistance R15 connects the input of amplifier U4:B, and the outfan of amplifier U4:B connects tabilized current power supply mould Block, this adjustable constant-flow source module includes amplifier U4:A, amplifier U4:D, audion Q9, audion Q10 Connect with the input of sampling resistor R19, amplifier U4:A and measure binding post D, measuring binding post D is connected relay R L2 with measuring between binding post E, measure binding post E and connect benchmark voltage chips U3, is connected relay R L2 between the outfan and the input of amplifier U4:B of reference voltage chip U3.

Analog-digital chip U2 is used for producing the analog quantity output signals of 0-4v；

5v reference voltage chip U3 provides the+2v benchmark of precision to analog-digital chip U2, makes U2 produce 0-4v analog signals accurately；

Having 4 groups of amplifiers inside analog quantity amplification chip U4, U4:C therein is as sign-changing amplifier, U4:B Phase inverter is functioned only as when 4-20ma exports, when 0-± 10ma exports due to the Guan Bi of relay R L1, U4:B is adder here；U4:A and U4:D and the group such as audion Q9, Q10 and sample resistance R19 Become tabilized current power supply；Relay R L2 is used for switching the output signal of 0-± 10ma and 0-± 10v.

D, E are two binding posts of aviation plug, are used for connecting proportioning valve to be measured or servo valve；

Central processing element U1 controls the voltage signal of analog-digital chip output 0.8-4v, and central authorities process simultaneously Chip U1 controls relay R L1 and RL2 disconnects, and the voltage signal of such 0.8-4v is through U4:C, U4:B Reversely, obtaining the voltage signal of 0.8-4v twice, this signal passes through by U4:A, U4:D, Q9, Q10 and adopts The tabilized current power supply of the composition such as sample resistance R19, can produce 4-20ma signal at D, E two ends.

Central processing element U1 controls the voltage signal of analog-digital chip output 0-4v, and central authorities process core simultaneously Sheet U1 controls relay R L1 adhesive RL2 and disconnects, and the voltage signal of such 0-4v reversely obtains through U4:C 0-bears the signal of 4v, and the signal of signal and reference voltage+2v that 0-is born 4v by U4:B is added, and U4:B is defeated Going out the voltage signal of 0-± 2v, this signal is by by U4:A, U4:D, Q9, Q10 and sampling resistor R19 Deng the tabilized current power supply of composition, produce 0-± 10ma signal at D, E two ends.

Central processing element U1 controls the voltage signal of analog-digital chip output 0-4v, and central authorities process core simultaneously Sheet U1 controls the adhesive RL2 adhesive of relay R L1, and the voltage signal of such 0-4v reversely obtains through U4:C 0-bears the signal of 4v, and the signal of signal and reference voltage+2v that 0-is born 4v by U4:B is added, and U4:B is defeated Going out the voltage signal of 0-± 2v, this signal is by by U4:A, U4:D, Q9, Q10 and sampling resistor R19 Deng the tabilized current power supply of composition, resistance R1 produces 0-± 10v signal at D, E two ends.

Central processing element U1 controls the voltage signal of analog-digital chip output 2-4v, and central authorities process core simultaneously Sheet U1 controls the adhesive RL2 adhesive of relay R L1, and the voltage signal of such 2-4v reversely obtains through U4:C Negative 2-bears the signal of 4v, and the signal of signal and reference voltage+2v that 2-is born 4v by U4:B is added, U4:B The voltage signal of output 0-+2v, this signal is by by U4:A, U4:D, Q9, Q10 and sampling resistor R19 Deng the tabilized current power supply of composition, resistance R1 produces 0-+10v signal at D, E two ends.

Above-mentioned intelligence switching uses the mode of maximum 20ma constant current, even if load short circuits is all without damaging this test Instrument.

Commonly see Fig. 5 without amplification board proportioning valve drive circuit, produce duty including central processing element U1, U1 Ratio adjustable pulse-width signal (PWM), signal is limited in 0-0.2v, simulates by divider resistance R5, R6 Amplifier chip U5, has 4 groups of amplifiers, wherein U5:D, U5:A and power amplification field effect inside U5 Pipe and the constant-current source of sample resistance R4 composition 0-2A, so can produce 0-2A stable on proportioning valve coil Pulse-width signal.

As shown in Figure 6, totally four tunnel, including central authorities' process core for the circuit of the automatic collecting unit of described feedback signal Sheet U1, relay R L3, relay R L4, Simulation scale-up chip U9, reference voltage chip U7,2.5v Reference voltage chip U7 provides 2.5v reference voltage for Simulation scale-up chip U9；In Simulation scale-up chip U9 There are four groups of amplifiers in portion, and wherein 0-± 10v voltage of feedback is converted to the 0-5v born by amplifier U9:A, It is converted into positive 0-5v through sign-changing amplifier U9:D again to process to central processing element, relay R L3, RL4 is used for switching the 0-± 10v of feedback, 4-20ma, 0-± 10ma, 0-10v signal, relay R L3, RL4 is connected with central processing element U1 respectively, and resistance R26 connects the input of amplifier U9:A, amplifies The outfan of device U9:A connects the input of sign-changing amplifier U9:D, sign-changing amplifier U9:D by resistance Outfan connect central processing element U1.

1, the 4-20ma signal of proportioning valve feedback is by the adhesive of central processing unit controls RL4, at sampling electricity The signal of 0.8-4v is produced, for CPU acquisition process on resistance R10.

2,0-± 10v signal of proportioning valve feedback, obtains the letter of 0-± 2.5v after resistance R26, R27 dividing potential drop Number, after this signal is added with reference voltage, U9:A output 0-bears 5v, obtains 0-5v, supply after U9:D is reverse CPU acquisition process.

3,0-± 10ma signal of proportioning valve feedback, by the adhesive of central processing unit controls RL3, makes R9 Ground connection produces 0-± 10v signal at F end, obtains the signal of 0-± 2.5v after resistance R26, R27 dividing potential drop, should After signal is added with reference voltage, U9:A output 0-bears 5v, obtains 0-5v, for centre after U9:D is reverse Reason unit acquisition process.

4, pressure transducer uses 0-30Mpa output 0-5v, may be coupled directly to gather port, for central authorities Processing unit acquisition process.

C is that aviation plug enables or feedback reference binding post, during without enabling signal, and C ground connection；Need to enable During signal, central processing unit controls C meets+24v by protective resistance.

Input signal is connected to the automatic collecting unit of feedback signal by 4 core aviation plugs, and CPU will Proportioning valve to be tested, valve core of servo valve displacement signal and the signal of pressure transducer collected, with Pressure gauge, The form of voltmeter or curve shows in control unit (touch screen) in display, it is simple to user is carried out Fault verification and performance test；As shown in Figure 7.

Described charged lithium cells group is 24v3000ma/h chargeable lithium battery group, band charging and overcurrent protection electricity Road, is equipped with the constant current charger of pressure limiting 25.2v, it is ensured that the safety of user, set of cells first is to be measured simultaneously Ratio, servo valve are powered, and second provides electric energy for external sensor, and the 3rd provides electric energy for tester inside.

24v Power convert is become the work needed for tester inside and controls voltage by described power conversion unit, Pulsewidth modulation (PWM) signal that additionally pwm power amplifying unit is used for central processing element produces is put Big to 0-2A, drive the proportioning valve (not having the proportioning valve of amplification board) of old type tube or common 24v reversal valve.

Described display uses serial ports touch screen with control unit, by serial ports and CPU communication, same Time the various information of CPU are shown in time, be the man machine interface of pure Chinese.

Described CPU (CPU) uses domestic STC single-chip microcomputer, and serial ports 1 is for download program Upgrading with program, serial ports 2 is used for and touch screen communication, and PCA port is used for output pwm signal, analog quantity Input port is used for processing the data of automatic collecting unit, and other I/O ports are used for intelligence switching and control simulation Amount output.

Shell uses aluminium alloy extrusions, oil resistant, elimination electromagnetic interference, is suitable for industry, metallurgy and manufacturing etc. Environment.External tapping all uses waterproof aviation plug, is used for connecting hydraulic control valve to be tested and pressure sensing Device, meets the breakdown judge under adverse circumstances and testing requirement.

Using method of the present utility model is:

6 core aviation plugs (18) of test instrument (17) are connected to hydraulic pressure to be detected by cable (20) 4 core aviation plugs (16) and the pressure transducer (15) being attached thereto are passed through quickly by control valve (11) Pressure measurement line (13) is connected to the output B chamber of hydraulic valve to be detected；By 4 core aviation plugs and the pressure being attached thereto Force transducer (14) is connected to the output A chamber of hydraulic valve to be detected by quick pressure measurement line (12)；Open electricity Source switch (19), selects corresponding parameter to test according to explanation.This utility model has manual test With two kinds of selections of test automatically, user can be carried out according to practical situation；User only need to Setting signal, The pressure simple analysis in spool displacement feedback signal and A, B chamber, can judge mechanical breakdown or hydraulic pressure, Electrical control fault；See accompanying drawing 8.

Above-described is only preferred implementation of the present utility model, it is noted that common for this area For technical staff, on the premise of conceiving without departing from utility model, it is also possible to make some deformation and improvement, These broadly fall into protection domain of the present utility model.

Claims (9)

1. an intelligent portable multifunctional hydraulic control valve Fault Diagnosis Testing Instrument device, it is characterised in that: include shell, display With control unit, interface and install first circuit board in the enclosure, second circuit board, the end face at shell installs display and control Unit processed, it is defeated that output interface, signals collecting input interface and pulse-width modulation PWM signal are externally tested in the sidewall installation at shell Outgoing interface, installs charged lithium cells, power conversion unit and pulse-width modulation PWM power amplification unit on first circuit board, This pulse-width modulation PWM power amplification unit is connected with pulse-width modulation PWM signal output interface by second circuit board；? CPU and the output signal automatic switch unit being connected with CPU I/O respectively, instead are installed on two circuit boards The automatic collecting unit of feedback signal, output signal automatic switch unit is connected with externally test output interface I/O, and feedback signal is automatic Collecting unit is connected with signals collecting input interface I/O, and CPU output connects display and control unit, charging lithium electricity Pond is connected with CPU by power transfer module, and charged lithium cells is also respectively connected with externally test output interface and signal Gather and input interface.

Intelligent portable multifunctional hydraulic control valve Fault Diagnosis Testing Instrument device the most according to claim 1, its feature exists In: the circuit of described output signal automatic switch unit includes central processing element U1, analog-digital chip U2, benchmark electricity Pressure chip U3 and analog quantity amplification chip U4, has 4 groups of amplifiers inside analog quantity amplification chip U4, respectively U4:A, U4:B, U4:C, U4:D, the outfan of analog-digital chip U2 connects the input of amplifier U4:C, amplifier U4:C by resistance Outfan connected the input of amplifier U4:B by resistance, the outfan of amplifier U4:B connects adjustable constant-flow source module, This adjustable constant-flow source module includes amplifier U4:A, amplifier U4:D, audion Q9, audion Q10 and sampling resistor R19, The input of amplifier U4:A connects measures binding post D, is connected with measuring measuring binding post D between binding post E Relay R L2, measures binding post E and connects benchmark voltage chips U3, at outfan and the amplifier of reference voltage chip U3 Connecting relay R L2 between the input of U4:B, analog-digital chip U2 is used for producing the analog quantity output signals of 0-4v；5v Reference voltage chip U3 provides the+2v benchmark of precision to analog-digital chip U2, makes U2 produce 0-4v analog quantity letter accurately Number；Analog quantity amplification chip U4 U4:C therein functions only as phase inverter as sign-changing amplifier, U4:B when 4-20ma exports, When 0-± 10ma exports due to the Guan Bi of relay R L1, U4:B is adder here；U4:A and U4:D and audion Q9, Q10 and sample resistance R19 etc. form tabilized current power supply；Relay R L2 is used for switching 0-± 10ma and 0-± 10v Output signal, measure binding post D, E be used for connect proportioning valve to be measured or servo valve.

Intelligent portable multifunctional hydraulic control valve Fault Diagnosis Testing Instrument device the most according to claim 1, its feature exists In: described output signal automatic switch unit control the signal of switching include 0-± 10v, 4-20ma, 0-± 10ma, 0-10v and With enabling the 0-± 10v of signal, 4-20ma.

Intelligent portable multifunctional hydraulic control valve Fault Diagnosis Testing Instrument device the most according to claim 1, its feature exists In: the automatic collecting unit of described feedback signal gathers proportioning valve, valve core of servo valve displacement signal and the signal of pressure transducer, Shown with the form of instrument or curve by display and control unit.

Intelligent portable multifunctional hydraulic control valve Fault Diagnosis Testing Instrument device the most according to claim 1, its feature exists In: the circuit of the automatic collecting unit of described feedback signal include central processing element U1, relay R L3, relay R L4, Simulation scale-up chip U9, reference voltage chip U7,2.5v reference voltage chip U7 provides 2.5v for Simulation scale-up chip U9 Reference voltage；Having four groups of amplifiers inside Simulation scale-up chip U9, wherein amplifier U9:A is by 0-± 10v voltage of feedback Be converted to the 0-5v born, then be converted into positive 0-5v through sign-changing amplifier U9:D and process to central processing element, relay R L3, RL4 be used for switch the 0-± 10v of feedback, 4-20ma, 0-± 10ma, 0-10v signal, relay R L3, RL4 respectively with central authorities Processing chip U1 to connect, resistance R26 connects the input of amplifier U9:A, and the outfan of amplifier U9:A is by resistance even Connecing the input of sign-changing amplifier U9:D, the outfan of sign-changing amplifier U9:D connects central processing element U1.

Intelligent portable multifunctional hydraulic control valve Fault Diagnosis Testing Instrument device the most according to claim 1, its feature exists In: described externally test output interface uses 6 core aviation plugs, described signals collecting input interface to use 4 core aviations to insert Head.

Intelligent portable multifunctional hydraulic control valve Fault Diagnosis Testing Instrument device the most according to claim 1, its feature exists In: described charged lithium cells is 24v3000ma/h chargeable lithium battery group, band charging and current foldback circuit, is equipped with limit simultaneously The constant current charger of pressure 25.2v.

Intelligent portable multifunctional hydraulic control valve Fault Diagnosis Testing Instrument device the most according to claim 1, its feature exists In: described display uses serial ports touch screen with control unit.

Intelligent portable multifunctional hydraulic control valve Fault Diagnosis Testing Instrument device the most according to claim 1, it is characterised in that: Described central processing unit CPU uses STC single-chip microcomputer.