CN205941758U - Hydraulic servo valve line detection device - Google Patents

Abstract

The utility model belongs to the detection of hydraulic control servovalve circuit, concretely relates to hydraulic servo valve line detection device, including central processing unit, with the module that resets, SPI interface module, the external clock module that central processing unit is connected respectively, its characterized in that, this line detection device still include seven apertures in the human head socket module and the liquid crystal display module who is connected respectively with central processing unit, instruct lamp module piece, preset circuit, feedback circuit, central processing unit 0, electric current source follower central processing unit 1 to reach the power distribution module who provides the power for each part. The utility model discloses utilize liquid crystal disply device to show in preset electric current and feedback current to the quality that the comparison determined preset circuit and feedback line is done with the effective value that PLC obtained to value according to its demonstration, has solved and correctly to have judged being that the preset circuit of servovalve breaks down or the problem that feedback circuit broke down.

Description

A kind of hydraulic efficiency servo-valve line detection apparatus

Technical field

The utility model belongs to the detection of hydraulic control servo valve circuit and in particular to a kind of hydraulic efficiency servo-valve wireline inspection Device.

Background technology

At present, with the continuous improvement of iron and steel production capacity, the strict demand to product quality；Rolling mill hydraulic servo valve is as control Rolling mill precision processed is very important in whole production process, the normal operation of servo valve directly affect milling train steady production and The quality of product, quickly judges that the quality of the given circuit of servo valve and feedback line is high yield and product quality steady production carries For directly helping.

Hydraulic efficiency servo-valve gives circuit and feedback line plug in rolling process, and due to the vibrations of milling train, servo valve is given Alignment road and feedback line plug can cause to loosen, even result in plug inside termination contact bad or broken string；Other environment Impact and the service life cycle of servo valve, servo valve can be led to damage；One kind is not had quickly to judge servo in process of production Valve gives circuit and the device of feedback line plug quality.It sometimes appear that again detecting given after changing 1-2 platform servo valve again Circuit and feedback line, lead to the prolongation of time of casualty, and the loosening of circuit can cause piling of steel accident sometimes, and direct economic loss is huge Greatly.

In order to eliminate, circuit loosens or broken string hidden danger judges servo valve circuit with quick investigation, whether changes offer for servo valve Directly instruct, be smoothly to produce to provide with steady production directly to help, it is to avoid stop for a long time；Therefore, develop one quickly Detection servo valve gives circuit and the device of feedback line is actually necessary.

Utility model content

The utility model provides a kind of hydraulic efficiency servo-valve line detection apparatus, solves and cannot correctly judge it is servo valve The problem that given line failure or feedback line break down.

A kind of hydraulic efficiency servo-valve line detection apparatus, including central processing unit, the reset being connected respectively with central processing unit Module, SPI interface module, external clock module it is characterised in that this line detection apparatus also include seven apertures in the human head jack module and with LCD MODULE that central processing unit connects respectively, indicating lamp module, given circuit, feedback circuit, voltage detecting circuit, electricity Stream source exports modular converter, and the power distribution module providing power supply to each several part；

Described given circuit, is connected between seven apertures in the human head jack module and central processing unit, for giving seven apertures in the human head jack module Fixed simulation gives current signal and is converted into the given voltage signal of simulation, then this simulation is given voltage signal and is transferred to central authorities The ADC module processing of processor is digital given unit current signal；

Described current source exports modular converter, is connected between central processing unit and feedback circuit, for processing central authorities The digital current signal that device gives is converted to analog current signal；

Described feedback circuit, is connected between current source output modular converter and central processing unit, for current source is defeated The analog feedback current signal going out modular converter output is converted into analog feedback voltage signal, then believes this analog feedback voltage The ADC module processing number being transferred to central processing unit is digital feedback current signal；

Described LCD MODULE, is directly connected with central processing unit, for turning the ADC coming from central processing unit The digital feedback current signal of die change block and digital given unit current signal show on a liquid crystal display；

Described seven apertures in the human head socket, for accessing corresponding module by the electric signal of each pin；Pin 1 He of seven apertures in the human head socket P1 The input interface all as power supply VCC24 for the pin 3, power supply VCC24 as power supply connect current source output modular converter and Power distribution module, the pin 2 of seven apertures in the human head socket P1 connects power distribution module as the interface of Enable Pin 0V, seven apertures in the human head socket P1's Pin 4 as the input interface of reverse current signal I- and pin 5 as forward current signal I+ input interface connect to Determine the input of circuit, the pin 6 of seven apertures in the human head socket P1 connects feedback circuit as the input interface of fed-back current signals Iout Input, pin 7 is as the interface of ground connection GND；

Described power distribution module, for being assigned as power supply VCC and power supply VEE by given power supply voltage signal VCC24 There is provided power supply to other various pieces.

Further, described given circuit includes resistance R19, and described resistance R19 is in parallel with electric capacity C15 and conduct gives electric current The input of testing circuit, the output end of given current detection circuit connects in-phase amplifier, and the output end of in-phase amplifier is even One end of connecting resistance R17, the other end of resistance R17 is grounded, described homophase as the output end of given circuit and by electric capacity C17 The reference voltage of amplifier is provided by reference voltage circuit；

Described given current detection circuit, is connected between seven apertures in the human head socket and central processing unit, for coming from seven apertures in the human head The given simulation of socket gives current signal and is converted into analog detection voltage signal, then passes this analog detection voltage signal Pass described in-phase amplifier.

Further, described feedback circuit includes feedback current testing circuit, and anti-with what feedback current testing circuit was connected Phase amplifier；

Described feedback current testing circuit, its input connects seven apertures in the human head socket and current source output modular converter respectively, its Output end connects the input of inverting amplifier, for coming from analog current signal and the mould of current source output modular converter Intend fed-back current signals and be converted into analog feedback voltage signal, then this analog feedback voltage signal is passed to anti-phase amplification Device.

Have the beneficial effect that produced by the utility model：

1st, the utility model is connected as device by the use of the seven apertures in the human head socket that servo valve plug matches and can eliminate because of contact not The erroneous judgement causing well；

2nd, the utility model judges the quality of given circuit using the first row data that liquid crystal display shows, using liquid The second row data that crystal display shows and HMI monitored picture as the foundation judging feedback line quality, to rolling line servo valve Given circuit and feedback line quick detection provide and directly instruct foundation, provide for quickly resuming production and directly help, thus Save fault time；

3rd, the utility model is by the use of the 24V power supply on servo valve plug circuit as the power supply of device it is not necessary to outer Connect power supply, flexibility is higher.

Brief description

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

Fig. 2 is the circuit theory diagrams of the utility model power distribution module；

Fig. 3 is the power supply indicator circuit theory diagrams of the utility model power distribution module；

Fig. 4 is the accessory module circuit theory diagrams of the utility model power distribution module；

Fig. 5 is the circuit theory diagrams of the utility model central processing unit；

Fig. 6 is the circuit theory diagrams of the utility model reseting module；

Fig. 7 is the circuit theory diagrams of the utility model LED indicating circuit；

Fig. 8 interrupts the circuit theory diagrams of filtration module for the utility model INT0；

Fig. 9 interrupts the circuit theory diagrams of filtration module for the utility model INT1；

Figure 10 interrupts the circuit theory diagrams of filtration module for the utility model INT2；

Figure 11 is the circuit theory diagrams of the utility model SPI interface module；

Figure 12 is the circuit theory diagrams of the utility model LCD MODULE；

Figure 13 is the circuit theory diagrams of the utility model given circuit；

Figure 14 is the circuit theory diagrams of the utility model voltage reference module；

Figure 15 exports the circuit theory diagrams of modular converter for the utility model current source；

Figure 16 is the circuit theory diagrams of the utility model feedback circuit；

Figure 17 is the circuit theory diagrams of the utility model voltage detecting circuit；

Figure 18 is the circuit theory diagrams of the utility model seven apertures in the human head socket.

Specific embodiment

Carry out further details of explanation the utility model with specific embodiment below in conjunction with the accompanying drawings, but the utility model Protection domain be not limited to this.

A kind of hydraulic efficiency servo-valve line detection apparatus, including central processing unit, the reset being connected respectively with central processing unit Module, SPI interface module, external clock module it is characterised in that this line detection apparatus also include seven apertures in the human head jack module and with LCD MODULE that central processing unit connects respectively, indicating lamp module, given circuit, feedback circuit, voltage detecting circuit, electricity Stream source exports modular converter, and the power distribution module providing power supply to various pieces.

As shown in figure 1, seven apertures in the human head jack module P1 provides seven jacks is respectively two power supply VCC24 respectively+24V electricity Source port and -24V power port, an Enable Pin 0V port, two Setting signal ports are respectively forward current signal I+ end Mouth and reverse current signal I- port, a fed-back current signals Iout port, a ground connection GND port；+ 24V power port Connect power distribution module with -24V power port, by power distribution module to central processing unit, given circuit, liquid crystal display mode Block, current source output modular converter and feedback circuit carry out power distribution；Enable Pin 0V port connects LCD MODULE, control The working condition of LCD MODULE processed；Given forward current signal I+ and reverse current signal I- is processed through given circuit Obtain afterwards being suitable for the given voltage signal of simulation that central processing unit is processed, described simulation gives voltage signal through central processing unit ADC modular converter by this simulation give voltage signal be converted to digital given unit voltage signal, one side central processing unit should Digital given unit voltage signal is transferred to the size that LCD MODULE shows this digital given unit voltage signal；Another aspect centre This digital given unit voltage signal is transferred to current source output modular converter by reason device, is obtained fed-back current signals through conversion Iout and output signal IV, on the one hand by described fed-back current signals Iout through the fed-back current signals Iout end of seven apertures in the human head socket Mouth feeds back to PLC；On the other hand described fed-back current signals Iout and output signal IV obtain being suitable for central authorities through feedback circuit The analog feedback voltage signal that processor is processed, described analog feedback voltage signal is through the ADC modular converter of central processing unit This analog feedback voltage signal is converted to digital feedback voltage signal, then central processing unit is by this digital feedback voltage signal It is transferred to the size that LCD MODULE shows this digital feedback voltage signal.

As shown in Fig. 2 power distribution module is made up of power supply chip U2, electric capacity and inductance, power supply chip U2 adopts A2405S chip, the Vin end 1 of power supply chip U2 connects power supply VCC24, and power supply VCC24 connects Enable Pin 0V, power supply by electric capacity C9 The GND end 2 of chip A2405 connects Enable Pin 0V, is connected with electric capacity between the Vin end 1 and GND end 2 of power supply chip A2405 C23；The V+ output end 6 of power supply chip A2405 connects power supply VCC, V+ output end 6 He of power supply chip A2405 by inductance L2 Power supply VCC connects COM end 5 by electric capacity C7 and C8 respectively, simultaneously COM end 5 ground connection GND；The V- output end of power supply chip A2405 4 is similar to the connected mode of V+ output end 6, and the V- output end 4 of power supply chip A2405 connects power supply VEE, power supply by inductance L3 The V- output end 4 of chip A2405 and power supply VEE connect COM end 5 by electric capacity C10 and C12 respectively.In conjunction with Fig. 3, power supply VCC24 It has been sequentially connected in series light emitting diode D2 and resistance R5, another termination Enable Pin 0V of resistance R5, when given supply voltage and make When energy end 0V is low level, light emitting diode D2 is bright, and the effect of this light emitting diode D2 is the instruction providing a power supply Effect, may certify that the supply voltage normal work of this power line VCC24 simultaneously；In conjunction with Fig. 4, between Enable Pin 0V and ground GND It is connected with inductance L4.Power supply VCC24 is assigned to two opposite polarity power supplys after power distribution module：Power supply VCC and Power supply VEE, power supply VCC and power supply VEE are used for providing power supply to other modules.

As shown in figure 5, central processing unit U1 adopts ATmega16-16AC single-chip microcomputer, ATmega16-16AC single-chip microcomputer PA0 ~ PA7 pin, PB0 ~ PB7 pin, PC0 ~ PC7 pin and PD0 ~ PD7 pin distribution condition as follows：PA0 ~ PA2 pin Distribute to A/D modular converter to use, PA3 ~ PA5 pin assignment uses as controlling switch to liquid crystal display, PA6 pin 31 He PA7 pin 30 is hanging；PC0 ~ PC7 pin assignment uses as data pin to liquid crystal display；PB5 ~ PB7 pin and RESET Pin assignment uses to SPI interface module, and PB2 pin and PD0 ~ PD1 pin assignment are given and interrupted filtration module use, PD2 ~ PD7 Pin assignment uses to current source output modular converter, and PB0 pin 40, PB1 pin 41 and PB4 pin 44 are hanging.Single-chip microcomputer will The ADC0 receiving analog feedback voltage signal, ADC1 simulation are given voltage by PA0 pin 37, PA1 pin 36, PA2 pin 35 Signal, ADC2 analog detection voltage signal are to be passed by PC0 ~ PC7 pin after digital voltage signal through ADC module processing It is defeated by liquid crystal display.

Single-chip microcomputer is powered by external power source supply module 3-2, and external power source supply module 3-2 connects monolithic by power supply VCC The VCC pin 5 of machine, VCC pin 17 and VCC pin 38, power supply VCC connects the AVCC pin 27 of single-chip microcomputer by inductance L1, with When GND is grounded by electric capacity C6, power supply AVCC pin 27 is grounded GND by electric capacity C5, and AREF pin 29 is grounded by electric capacity C4 GND, the GND pin 28 of single-chip microcomputer, GND pin 6, GND pin 18 and GND pin 39 are grounded GND respectively.

The clock signal of single-chip microcomputer selects to obtain by way of internal oscillator, therefore clock circuit module 3-1 of single-chip microcomputer Consist of：The XTAL1 pin 8 of single-chip microcomputer is grounded GND by electric capacity C11, and XTAL2 pin 7 is grounded by electric capacity C3, simultaneously XTAL1 pin 8 connects the pin 1 of crystal oscillator XT, and the pin 2 of crystal oscillator X1 connects XTAL2 pin 7.

As shown in fig. 6, the reseting module 3-3 of single-chip microcomputer is to be sequentially connected in series resistance R4 and electric capacity C2 and be grounded by power supply VCC, Electric capacity C2 two ends parallel connection RST button SW-PB, node R ST that electric capacity C2 is connected with resistance R4 connects the RESET pin 4 of single-chip microcomputer, Described RST button SW-PB is SR.

As shown in fig. 7, LED indicating circuit 3-4 is to be sequentially connected light emitting diode D1 and resistance R3 by power supply VCC, and with The LED0 pin 43 of single-chip microcomputer connects.

As shown in Fig. 8, Fig. 9, Figure 10, single-chip microcomputer INT0, INT1 are similar with the design of the interruption filtration module of INT2, INT0 Interrupting filtration module 4-1 is：Power supply VCC is sequentially connected in series resistance R1, button SET and resistance R2 and is grounded GND, resistance R1 and button The node INT0 that SET connects is connected with the PB2 pin 42 of single-chip microcomputer, and PB2 pin 42 is grounded GND by electric capacity C1 simultaneously, described Button SET is the settings button of given electric current, if desired sets given electric current, then press described button SET；In INT1 Disconnected filtration module 4-2 is：Power supply VCC is sequentially connected in series resistance R33, button DOWN and resistance R34 and is grounded GND, resistance R33 and pressing The node INT1 that button DOWN connects is connected with the PD1 pin 10 of single-chip microcomputer, and PD1 pin 10 is grounded GND by electric capacity C21 simultaneously, Described button DOWN is used for turning the numerical value of given electric current down；INT2 interrupts filtration module 4-3：Power supply VCC is sequentially connected in series electricity Resistance R35, button UP and resistance R36 are simultaneously grounded GND, and the node INT2 and PD0 of single-chip microcomputer that resistance R35 and button DOWN connects draws Pin 9 connects, and PD0 pin 9 is grounded GND by electric capacity C22 simultaneously, and described button UP is used for tuning up the numerical value of given electric current.

As shown in figure 11, SPI interface module P2 is used for and main-machine communication, and SPI interface module P2 is powered by power supply VCC, electricity Source VCC connects the pin 2 of ISP interface, and the pin 4 of ISP interface, pin 6, pin 8 and pin 10 are grounded, the MOSI of ISP interface Pin 1, MISO pin 9, SCK pin 7, RST pin 5 successively with the PB5 pin 1 of central processing unit, PB6 pin 2, PB7 pin 3rd, RESET pin 4 connects, and the pin 3 of ISP interface is hanging.

As shown in figure 12, LCD MODULE P3 adopts 1602 liquid crystal displays, and 1602 liquid crystal displays have 16 altogether Pin, the pin 1 of 1602 liquid crystal displays, pin 3 and pin 16 ground connection GND, the pin 2 of 1602 liquid crystal displays directly connects electricity Source VCC, the pin 15 of 1602 liquid crystal displays connects power supply VCC, pin 4 conduct of 1602 liquid crystal displays by series resistance R7 RS pin is connected with the PA3 pin 34 of single-chip microcomputer, and the pin 5 of 1602 liquid crystal displays draws as the PA4 of WR pin and single-chip microcomputer Pin 33 connects, and the pin 6 of 1602 liquid crystal displays is connected with the PA5 pin 32 of single-chip microcomputer as LCDEN pin, 1602 liquid crystal Show that the PC7 ~ PC0 pin 26 ~ 19 as D0 ~ D7 data pin and single-chip microcomputer is sequentially connected successively for the pin 7 ~ 14 of device.Work as data When pin receives the data message that single-chip microcomputer transmission comes, this data message is shown on a liquid crystal display, liquid crystal display The first row be shown that given forward current signal I+ and reverse current signal I-, the second row be shown that feedback current believe Number Iout.

As shown in figure 13, given circuit is connected between seven apertures in the human head jack module and central processing unit, for by seven apertures in the human head socket The simulation that module gives gives current signal and is converted into the given voltage signal of simulation, then this simulation is given voltage signal transmission ADC module processing to central processing unit is data signal.Forward current signal I+ and reverse current signal I- is as giving Determine the input signal of circuit, obtain voltage signal ADC1 after given circuit, voltage signal ADC1 is as single-chip microcomputer PA1 pin 36 input signal.Given circuit includes resistance R19, and described resistance R19 is in parallel with electric capacity C15 and electric as given current detecting The input of road 7-1, the output end of given current detection circuit 7-1 connects in-phase amplifier 7-2, and in-phase amplifier 7-2's is defeated Go out one end that end connects resistance R17, the other end of resistance R17 is grounded by electric capacity C17, and the output end as given circuit, The reference voltage of described in-phase amplifier 7-2 is provided by reference voltage circuit 7-3.Described given current detection circuit 7-1 connects Between seven apertures in the human head socket and central processing unit, it is converted into for the given simulation coming from seven apertures in the human head socket is given current signal Then this simulation is given voltage signal and passes to described in-phase amplifier 7-2 by the given voltage signal of simulation.Given current detecting Given current signal is converted into voltage signal by circuit 7-1, and forward current signal I+ and reverse current signal I- is as given The given simulation of circuit gives current signal, and resistance R19 shunt capacitance C15, reversing the current input I- connect resistance R19's One end, forward current input I+ connects the other end of resistance R19；Forward current input I+ and reversing the current input I- is same When also serve as the input signal of given current detection circuit 7-1, given current detection circuit 7-1 mainly includes integrated computation and amplifies Device U4A, reversing the current input I- are simultaneously connected with one end of resistance R16, and forward current input I+ is simultaneously connected with resistance R22 mono- End, the other end of the other end of resistance R16 and resistance R22 connect respectively integrated operational amplifier U4A inverting input 2 and with Phase input 3, the in-phase input end 3 of integrated operational amplifier U4A is grounded GND, integrated operational amplifier U4A by resistance R25 Inverting input 2 be connected with the output end 1 of integrated operational amplifier U4A by feedback resistance R9, integrated operational amplifier U4A Positive supply input 8 and negative supply input 4 connect power supply VCC and power supply VEE, integrated operational amplifier U4A, resistance respectively R16, resistance R22, feedback resistance R9, resistance R25, power supply VCC, power supply VEE and ground GND constitute given current detection circuit 7-1.In-phase amplifier 7-2 is connected between given current detection circuit 7-1 and central processing unit, for described in coming to The given voltage signal of simulation determining current detection circuit 7-1 is processed, and then gives described central processing unit by this signal transmission Process.The output end 1 of integrated operational amplifier U4A connects the in-phase input end 5 of integrated operational amplifier U4B by resistance R18, The in-phase input end 5 of integrated operational amplifier U4B and inverting input 6 pass through resistance R21 and resistance R13 respectively and are grounded GND, collection The in-phase input end 5 becoming operational amplifier U4B connects reference voltage REF33 by resistance R23, integrated operational amplifier U4B's Inverting input 6 is connected with the output end 7 of integrated operational amplifier U4B by feedback resistance R8, integrated operational amplifier U4B's Positive supply input 8 is connected power supply VCC and power supply VEE, integrated operational amplifier U4B, resistance respectively with negative supply input 4 R18, resistance R21, resistance R23, feedback resistance R8, resistance R13, power supply VCC, power supply VEE and ground GND constitute homophase and amplify Device 7-2.As shown in figure 14, reference voltage circuit is directly connected with in-phase amplifier, for providing base to described in-phase amplifier Quasi- voltage.Voltage reference module U6 selects REF3033 module, and the IN pin 1 of voltage reference module U6 connects power supply VCC, power supply VCC is grounded GND by electric capacity C20, and the GND pin 3 of voltage reference module U6 is directly grounded GND, the OUT of voltage reference module U6 Pin 2 exports as reference voltage REF33, and voltage reference module U6, power supply VCC, electric capacity C20 and ground GND constitute benchmark Potential circuit 7-3.The output end 7 of integrated operational amplifier U4B connects electric capacity C17 being grounded by resistance R17, resistance R17 with The voltage signal ADC1 that the voltage signal of connecting node ADC1 of electric capacity C17 gathers as single-chip microcomputer PA1 pin 36.

As shown in figure 15, current source output modular converter is connected between central processing unit and feedback circuit, in inciting somebody to action The digital current signal that central processor gives is converted to analog current signal；Current source output conversion chip U3 adopts programmable electricity Stream source output translator AD5402, current source exports the SDO pin 10 of conversion chip U3 as SDO pin, SDIN pin 9 conduct SDIN pin, SCLK pin 8 draw as CLEAR as LATCH pin, CLEAR pin 6 as SCLK pin, LATCH pin 7 Pin and FAULT pin 3 are drawn with the PD2 pin 11 of single-chip microcomputer, PD3 pin 12, PD4 pin 13, PD5 successively as FAULT pin Pin 14, PD6 pin 15, PD7 pin 16 are connected；The DVcc pin 2 that current source exports conversion chip U3 connects power supply VCC, power supply VCC is grounded by electric capacity C19, and the Rset pin 13 that current source exports conversion chip U3 is grounded by resistance R28, and current source exports The REFIN pin of conversion chip U3 is connected with REFOUT pin and is grounded by electric capacity C18, GND pin 1, GND pin 4, GND Pin 5, GND pin 12, DVcc Select pin 16, AGND pin 11 and Power Pad pin 25 are all grounded GND, AVDD Pin 24 connects power supply VCC24, and CAP1 pin 21 and CAP2 pin 22 pass through electric capacity C13 and electric capacity C14 respectively and connect power supply VCC24, the Iout pin 19 that current source exports conversion chip U3 is grounded by electric capacity C16, and current source exports conversion chip U3's The colelctor electrode 3 of BOOST pin 20 connecting triode Q1, current source exports the Iout pin 19 connecting triode Q1 of conversion chip U3 Base stage 2, current source export conversion chip U3 Iout pin 19 be connected with the emitter stage 1 of triode Q1 by resistance R14, three The emitter stage 1 of pole pipe Q1 connects one end of resistance R11, and the other end of resistance R11 is as fed-back current signals Iout, described feedback Current signal Iout is exported by 7 spring hole scokets and feeds back to PLC, simultaneously as the in-phase input end of feedback circuit, triode Q1 Emitter stage 1 GND is grounded by resistance R15, the emitter stage 1 of triode Q1 as current source export modular converter another is defeated Go out signal IV, described output signal IV is simultaneously as the inverting input of feedback circuit.

As shown in figure 16, feedback circuit includes feedback current testing circuit 9-1, and with feedback current testing circuit 9-1 phase Inverting amplifier 9-2 even.The input of feedback current testing circuit 9-1 connects seven apertures in the human head socket and current source output conversion respectively Module, the output end of feedback current testing circuit 9-1 connects the input of inverting amplifier 9-2, for coming from current source The analog current signal of output modular converter and analog feedback current signal are converted into analog feedback voltage signal, then by this mould Intend feedback voltage signal and pass to inverting amplifier 9-2；Fed-back current signals Iout and output signal IV are respectively as feedback electricity The homophase input end signal on road and anti-phase input end signal, obtain voltage signal ADC0, voltage signal after feedback circuit ADC0 connects integrated operational amplifier U5A as the input signal of single-chip microcomputer PA0 pin 37, input signal IV by resistance R20 Inverting input 2, the inverting input 2 of integrated operational amplifier U5A connects integrated operational amplifier by feedback resistance R10 The output end 1 of U5A；Input signal Iout connects the in-phase input end 3 of integrated operational amplifier U5A, integrated fortune by resistance R27 Calculate the in-phase input end 3 of amplifier U5A and GND be grounded by resistance R29, the positive supply input 8 of integrated operational amplifier U5A with Negative supply input 4 connects power supply VCC and power supply VEE, integrated operational amplifier U5A, resistance R20, resistance R27, feedback respectively Resistance R10, resistance R29, power supply VCC, power supply VEE and ground GND constitute feedback current testing circuit 9-1.Inverting amplifier 9-2 is connected between feedback current testing circuit 9-1 and central processing unit, for coming from feedback current testing circuit 9-1 Analog feedback voltage signal processed, then this analog signal is passed to described central processing unit and processes.Integrated computation The output end 1 of amplifier U5A connects the inverting input 6 of integrated operational amplifier U5B by resistance R24, and integrated computation amplifies The inverting input 6 of device U5B connects the output end 7 of integrated operational amplifier U5B by feedback resistance R12, and integrated computation amplifies The in-phase input end 5 of device U5B is grounded GND, the positive supply input 8 of integrated operational amplifier U5B and negative supply by resistance R26 Input 4 connects power supply VCC and power supply VEE, integrated operational amplifier U5B, resistance R24, resistance R26, feedback resistance respectively R12, power supply VCC, power supply VEE and ground GND constitute inverting amplifier 9-2, output end 7 He of integrated operational amplifier U5B The voltage signal ADC0 that the voltage signal of connecting node ADC0 of feedback resistance R12 gathers as single-chip microcomputer PA0 pin 37.

As shown in figure 17, voltage detecting circuit is the voltage detecting realized by voltage follower, and voltage follower includes Integrated operational amplifier U7A, power supply VCC24 are sequentially connected in series resistance R30 and resistance R32 and are grounded GND, resistance R30 and resistance R32 Connecting node by resistance R31 connect integrated operational amplifier U7A in-phase input end 3, integrated operational amplifier U7A's is anti- Phase input 2 is directly connected to its output end 1, positive supply input 8 and 4 points of the negative supply input of integrated operational amplifier U7A Not Lian Jie power supply VCC and power supply VEE, integrated operational amplifier U7A, resistance R30, resistance R32, resistance R31, power supply VCC24, electricity Source VCC, power supply VEE and ground GND constitute voltage follower.The ADC2 electricity of output end 1 output of integrated operational amplifier U7A The voltage signal ADC2 that pressure signal gathers as single-chip microcomputer PA2 pin 35.

As shown in figure 18, seven apertures in the human head socket is used for for the electric signal of each pin accessing corresponding module；Seven apertures in the human head socket P1 adopts With Header7, the pin 1 and pin 3 of the seven apertures in the human head socket P1 input interface all as power supply VCC24, the electricity that wherein pin 1 receives Source VCC24 is+24V voltage, and the power supply VCC24 that pin 3 receives is -24V voltage, and two kinds of opposite polarity voltages are deposited when different Connect current source output modular converter in, the pin 1 of seven apertures in the human head socket P1 and the power supply VCC24 of pin 3 collectively as power supply With power distribution module, the pin 2 of seven apertures in the human head socket P1 connects power distribution module, seven apertures in the human head socket P1 as the interface of Enable Pin 0V Pin 4 connect as the input interface of forward current signal I+ as the input interface of reverse current signal I- and pin 5 The input of given circuit, the pin 6 of seven apertures in the human head socket P1 connects feedback circuit as the input interface of fed-back current signals Iout Input, pin 7 as ground connection GND interface.

In sum, 1602 liquid crystal displays can show two row data, and the first row is shown that the number that servo valve gives Value：Forward current signal I+ and reverse current signal I-, the second row is shown that the fed back values of servo valve：Fed-back current signals Iout.During the use of this device, if 1602 liquid crystal display two row does not all show any numerical value, can determine that electricity Source distribute module has open circuit；If the forward current signal I+ that the first row of 1602 liquid crystal displays shows and reverse current signal The numerical value of I- is consistent with actual given numerical value, then give circuit normally, and otherwise giving circuit has open circuit；If 1602 liquid crystal Show the numerical value one of the fed-back current signals Iout that the numerical value of fed-back current signals Iout that the second row of device shows is received with PLC Cause, then feedback line is normal, and otherwise feedback line normally has open circuit.

It is noted that above-described embodiment is illustrative and not limiting to technical solutions of the utility model, affiliated technology neck The equivalent of domain those of ordinary skill or the other modifications made according to prior art, as long as do not exceed the utility model skill The thinking of art scheme and scope, should be included within the interest field required by the utility model.

Claims (3)

1. a kind of hydraulic efficiency servo-valve line detection apparatus, including central processing unit, the reset mould being connected respectively with central processing unit Block, SPI interface module, external clock module it is characterised in that this line detection apparatus also include seven apertures in the human head jack module and with LCD MODULE that central processor connects respectively, indicating lamp module, given circuit, feedback circuit, voltage detecting circuit, electric current Source exports modular converter, and the power distribution module providing power supply to each several part；

Described given circuit, is connected between seven apertures in the human head jack module and central processing unit, for give seven apertures in the human head jack module The given current signal of simulation is converted into the given voltage signal of simulation, then this simulation is given voltage signal and is transferred to central authorities' process The ADC module processing of device is digital given unit current signal；

Described current source exports modular converter, is connected between central processing unit and feedback circuit, for giving central processing unit Fixed digital current signal is converted to analog current signal；

Described feedback circuit, is connected between current source output modular converter and central processing unit, for turning current source output The analog feedback current signal of die change block output is converted into analog feedback voltage signal, then passes this analog feedback voltage signal The ADC module processing being defeated by central processing unit is digital feedback current signal；

Described LCD MODULE, is directly connected with central processing unit, for coming from the ADC modulus of conversion of central processing unit The digital feedback current signal of block and digital given unit current signal show on a liquid crystal display；

Described seven apertures in the human head socket, for accessing corresponding module by the electric signal of each pin；The pin 1 of seven apertures in the human head socket P1 and pin 3 input interfaces all as power supply VCC24, power supply VCC24 connects current source output modular converter and power supply as power supply Distribute module, the pin 2 of seven apertures in the human head socket P1 connects power distribution module, the pin of seven apertures in the human head socket P1 as the interface of Enable Pin 0V 4 connect given electricity as the input interface of reverse current signal I- and pin 5 as the input interface of forward current signal I+ The input on road, the pin 6 of seven apertures in the human head socket P1 connects the input of feedback circuit as the input interface of fed-back current signals Iout End, pin 7 is as the interface of ground connection GND；

Described power distribution module, for being assigned as power supply VCC and power supply VEE to it by given power supply voltage signal VCC24 He provides power supply at various pieces.

2. a kind of hydraulic efficiency servo-valve line detection apparatus according to claim 1 are it is characterised in that described given circuit bag Include resistance R19, described resistance R19 simultaneously input as given current detection circuit in parallel with electric capacity C15, given current detecting The output end of circuit connects in-phase amplifier, and the output end of in-phase amplifier connects one end of resistance R17, and resistance R17's is another End be grounded as the output end of given circuit and by electric capacity C17, and the reference voltage of described in-phase amplifier is electric by reference voltage Road provides；

Described given current detection circuit, is connected between seven apertures in the human head socket and central processing unit, for coming from seven apertures in the human head socket Given simulation give current signal be converted into analog detection voltage signal, then this analog detection voltage signal is passed to Described in-phase amplifier.

3. a kind of hydraulic efficiency servo-valve line detection apparatus according to claim 1 are it is characterised in that described feedback circuit bag Include feedback current testing circuit, and the inverting amplifier being connected with feedback current testing circuit；

Described feedback current testing circuit, its input connects seven apertures in the human head socket and current source output modular converter, its output respectively End connects the input of inverting amplifier, for exporting coming from current source the analog current signal of modular converter and simulating anti- Supply current signal is converted into analog feedback voltage signal, then this analog feedback voltage signal is passed to inverting amplifier.