CN103518628A

CN103518628A - Electronic controller of electric pulsation milking machine

Info

Publication number: CN103518628A
Application number: CN201310501090.8A
Authority: CN
Inventors: 李保岭
Original assignee: Individual
Current assignee: Individual
Priority date: 2013-10-23
Filing date: 2013-10-23
Publication date: 2014-01-22
Anticipated expiration: 2033-10-23
Also published as: CN103518628B

Abstract

The invention discloses an electronic controller of an electric pulsation milking machine. The controller not only comprises a power supply circuit, an electronic switch circuit and a load short circuit protection circuit, but also comprises a 12V working power supply protection circuit composed of a fifth not gate of an IC1, a sixth not gate of the IC1 and a field effect transistor BG1. According to the electronic controller, the integrated circuit with the six not gates is used as the IC1, a square-wave generator is composed of the first not gate of the IC1, the second not gate of the IC1, a resistor R3, a resistor R4, a charging and discharging capacitor C3 and a charging and discharging capacitor C4, the third not gate of the IC1 is used as an isolation level, the fourth not gate of the IC1 is used as a phase inverter to complete the alternate pulsation signal output of another circuit, the working power supply protection circuit is composed of the fifth not gate of the IC1, the sixth not gate of the IC1 and the field effect transistor BG1 and protects a three-end voltage stabilization power supply L7812 and a resistor R1, and therefore the problem that a circuit board of the whole machine is burnt due to the fact that the temperature of the three-end voltage stabilization power supply L7812 and the temperature of the resistor R1 are kept excessively high can be effectively solved, and both working performance and working efficiency of the controller can further be ensured and improved.

Description

The electronic controller of electricity pulsation milking machine

Technical field

What the present invention relates to is milking equipment, specifically for the electronic controller of electric pulsation milking machine.

Background technology

Speed is fast, the high market advantage of occupying of milk yield because its ripple frequency is stablized, milked for electricity pulsation milking machine; and electronic controller is requisite critical component on electric pulsation milking machine equipment; but with regard to the used electric pulsator milking machine in market; the control circuit of its pulsator is complicated; and non-loaded short-circuit protection, when pulsator is short-circuited fault, can not auto-breaking and cause controller to damage; both affected normally and milked, increased again cost.

China Patent No. is 200920101007.7; name is called the load short-circuit protection circuit designing in the utility model patent of " electronic controller of electric pulsation milking machine " the circuit elements device of controller has been implemented to protection; when electric pulsator is short-circuited fault; power circuit auto-breaking; after short trouble is removed; power circuit recovers to connect automatically, overcomes the problem that causes components and parts to damage because of unexpected load short circuits.This design in actual use, finds that the dutycycle of this controller still has asymmetric phenomenon, causes the exercise not harmony of milking of milking machine, and Lactation of Dairy Cow has some setbacks, and stops even in advance lactation, and circuit debugging difficulty, affects the operating efficiency of milking machine.

China Patent No. is 201220493879.4 and is called that the utility model patent of " electronic controller of electric pulsation milking machine " improves in above-mentioned design basis, has solved the asymmetric problem of former controller dutycycle.But in actual use; while finding that in this controller, indivedual original papers damage; the phenomenon that occurs the short circuit of 12V working power; cause the temperature of three-terminal voltage-stabilizing power supply L7812 and divider resistance R1 to continue to raise; circuitry plate burns the most at last; therefore must take measures three-terminal voltage-stabilizing power supply L7812 and divider resistance R1 to protect, while avoiding milking machine to come into operation, the problems referred to above occur and to the user that milks, cause damage.

Summary of the invention

The electronic controller that the object of this invention is to provide a kind of electric pulsation milking machine; this controller is set up working power holding circuit for the problems referred to above on the basis that does not change primary circuit design; three-terminal voltage-stabilizing power supply L7812 in controller and divider resistance R1 are implemented to protection, solve the problem that causes circuitry plate to burn because of three-terminal voltage-stabilizing power supply L7812 and divider resistance R1 excess Temperature.

The present invention is achieved through the following technical solutions: the electronic controller of electric pulsation milking machine comprises power circuit, electronic switching circuit and load short-circuit protection circuit, power circuit comprises bridge rectifier block, filter capacitor C1, C2, divider resistance R1 and L7812 three-terminal voltage-stabilizing power supply, square-wave generator in electronic switching circuit is by first of IC 1, the second not gate, resistance R 3, resistance R 4, capacitor C 3, capacitor C 4 forms, the square wave that generation dutycycle is 50:50, the input 1 pin contact resistance R3 of IC 1 first not gate and one end of capacitor C 4, the other end and the capacitor C 3 of output 2 pin contact resistance R3, the other end of capacitor C 3 connects input 3 pin of IC 1 second not gate, resistance R 4, the output 4 pin contact resistance R4 of the second not gate and the other end of capacitor C 4, input 5 pin that simultaneously connect the 3rd not gate, 7 pin ground connection of IC 1, the output of square-wave generator connects the input of IC 1 the 3rd not gate of doing isolation level use, output at the 3rd not gate is divided into the square-wave signal that two-way dutycycle is 50:50, the output of one route IC 1 the 3rd not gate connects the positive pole of diode D1, the negative pole of diode D1 connects the input of IC 2 second NAND gates, the output of the second NAND gate connects the input of IC 2 the 3rd NAND gate, the square-wave signal that is 70:30 by the output output duty cycle of the 3rd NAND gate, the output of IC 2 the 3rd NAND gate connects the control utmost point of FET BG2, by FET BG2, go to control energising and the release of left pulsation coil J1, the output of another route IC 1 the 3rd not gate connects the input of doing the 4th not gate that phase inverter uses, the output of the 4th not gate connects the positive pole of diode D2, the negative pole of diode D2 connects the input of IC 2 first NAND gates, the output of the first NAND gate connects the input of IC 2 the 4th NAND gate, the square-wave signal that is 70:30 by the output output duty cycle of the 4th NAND gate, the output of IC 2 the 4th NAND gate connects the control utmost point of FET BG3, by FET BG3, go to control energising and the release of right pulsation coil J2, FET BG2, the source electrode of BG3 is by resistance R 11 ground connection, load short-circuit protection circuit comprises FET BG1, resistance R 2, controllable silicon CRT, resistance R 11, the control utmost point contact resistance R11 of controllable silicon CRT, the source electrode that is simultaneously communicated with FET BG2, BG3, the minus earth of controllable silicon CRT, the control utmost point of anodic bonding FET BG1, resistance R 2 one end connect the control utmost point of FET BG1 and the anode of controllable silicon CRT, other end connection+24V power supply, in this controller, also comprise 12V working power holding circuit, 12V working power holding circuit is comprised of the 5th, the 6 two not gate and the FET BG1 of IC 1, 11 pin of the 5th not gate input of IC1 connect the positive pole of 12V power supply, 10 pin of IC1 the 5th non-gate output terminal connect 13 pin of IC1 the 6th not gate input, and 12 pin of IC1 the 6th non-gate output terminal connect 1 pin that FET BG1 controls the utmost point.

Adopt the good effect of technique scheme: in the present invention, use the integrated circuit that six not gates, model are CD4069 to be IC1, first, second not gate of use IC1 and resistance R 3, resistance R 4, charge and discharge capacitance C3, capacitor C 4 form square-wave generators; With the 3rd not gate of IC1, do isolation level, the 4th not gate of IC1 is made phase inverter, completes another road alternate pulsation signal output; With the 5th, the 6 two not gate and the FET BG1 of IC1, form working power holding circuit; three-terminal voltage-stabilizing power supply L7812 and resistance R 1 are implemented to protection; effectively overcome because of three-terminal voltage-stabilizing power supply L7812 and the lasting too high problem that causes circuitry plate to burn of resistance R 1 temperature, the service behaviour of controller and operating efficiency can further be guaranteed and be improved.

Four, accompanying drawing explanation

Fig. 1 is circuit diagram of the present invention;

Fig. 2 is the block diagram of electronic controller;

Fig. 3 is the circuit diagram of former electric pulsation milking machine electronic controller.

Five, embodiment: the invention will be further described below in conjunction with accompanying drawing:

Fig. 1 is circuit diagram of the present invention; Fig. 2 is the block diagram of electronic controller; shown in Fig. 1, Fig. 2, the electronic controller of electric pulsation milking machine comprises power circuit, electronic switching circuit and load short-circuit protection circuit, also comprises 12V working power holding circuit in this controller.The model of the IC 1 in circuit is CD4069, and the model of IC2 is CD4011B, and the model of FET BG1, BG2, BG3 is IRFz44N, and the model of controllable silicon CRT is 97A6.

Power circuit comprises bridge rectifier block, filter capacitor C1, C2, divider resistance R1, three-terminal voltage-stabilizing power supply L7812, FET BG1, resistance R 2.It is anodal that bridge rectifier block output pin 4 connects filter capacitor C1, by divider resistance R1, connect again the input of three-terminal voltage-stabilizing power supply L7812 simultaneously, its output connects the positive pole of filter capacitor C2, filter capacitor C1, earth terminal 2 pin of the negative pole connection three-terminal voltage-stabilizing power supply L7812 of C2 are ground connection in the lump, the positive supply of three-terminal voltage-stabilizing power supply L7812 output connects the drain electrode of FET BG1, the source electrode output of field effect transistor switch pipe BG1+12V power

supply connection IC

1, 14 pin of IC2, one end of resistance R 2 is communicated with+24V power supply, the other end connects the control utmost point of field effect transistor switch pipe BG1, the operating point that is field effect transistor switch pipe BG1 by resistance R 2 provides positively biased threshold voltage.In real work, often there is the too high phenomenon of three-terminal voltage-stabilizing power supply L7812 temperature rise to occur, therefore between three-terminal voltage-stabilizing power supply L7812 and power supply, increase divider resistance R1, for reducing the temperature rise producing when three-terminal voltage-stabilizing power supply L7812 works.

In electronic switching circuit, by IC 1 first, second not gate, resistance R 3, resistance R 4, charge and discharge capacitance C3, capacitor C 4, form square-wave generator, its operating frequency is 60 beats/min, the waveform that square-wave signal dutycycle is 50:50, high-low level time is equal producing, both multivibrator circuit.The input 1 pin contact resistance R3 of IC 1 first not gate and one end of capacitor C 4, the other end and the capacitor C 3 of output 2 pin contact resistance R3, the other end of capacitor C 3 connects input 3 pin, the resistance R 4 of IC 1 second not gate, the output 4 pin contact resistance R4 of the second not gate and the other end of capacitor C 4, input 5 pin that simultaneously connect the 3rd not gate, 7 pin ground connection of IC 1.Output 4 pin of IC 1 second not gate connect input 5 pin do IC 1 the 3rd not gate that isolation level uses, at output 6 pin of IC 1 the 3rd not gate, are divided into the square-wave signal that two-way dutycycle is 50:50.Output 6 pin of one route IC 1 the 3rd not gate connect the positive pole of diode D1, and the negative pole of diode D1 connects charge and discharge capacitance C5, discharge resistance R5, the other end ground connection of discharge resistance R5, charge and discharge capacitance C5.The negative pole of diode D1 connects

input

5,6 pin of the second NAND gate of IC 2 simultaneously, output 4 pin of the second NAND gate connect

input

8,9 pin of IC 2 the 3rd NAND gate, output 10 pin of the 3rd NAND gate connect the control utmost point of FET BG2, the drain electrode of FET BG2 connects left pulsator coil J1, the other end connection+24V power supply of left pulsator coil J1.By IC 2 the 3rd NAND gate output frequency, be 60 beats/min, the square-wave signal that dutycycle is 70:30, controls energising and the release of left pulsation coil J1 by conducting and the shutoff of FET BG2.One end of the source electrode contact resistance R11 of FET BG2, the other end ground connection of resistance R 11.The drain electrode of FET BG2 connects the positive pole of discharge diode D3, the negative pole connection+24V power supply of discharge diode D3.FET BG2 drain electrode connects one end of R9 resistance, the negative pole of the other end connecting luminous diode LED1 of resistance R 9, the positive pole connection+24V power supply of LED 1 simultaneously.In the dead electricity moment of left pulsation coil J1, the back-emf left pulsation coil being produced by diode D3 discharges, and FET BG2 is implemented to protection.Output 6 pin of another route IC 1 the 3rd not gate connect input 9 pin do IC 1 the 4th not gate that phase inverter uses, the square-wave signal that is 50:50 by the 4th non-gate output terminal 8 pin output duty cycles, the frequency of signal is identical with the first via, level single spin-echo.Output 8 pin of IC 1 the 4th not gate connect the positive pole of diode D2, and the negative pole of diode D2 connects charge and discharge capacitance C6, discharge resistance R6, the other end ground connection of discharge resistance R6, charge and discharge capacitance C6.The negative pole of diode D2 connects

input

1,2 pin of the first NAND gate of IC 2,7 pin ground connection of IC 2 simultaneously.Output 3 pin of the first NAND gate connect

input

12,13 pin of IC 2 the 4th NAND gate, output 11 pin of IC 2 the 4th NAND gate connect the control utmost point of FET BG3, the drain electrode of FET BG3 connects right pulsator coil J2, the other end connection+24V power supply of right pulsator coil J2.Identical with last road frequency by IC 2 the 4th NAND gate output, the square-wave signal that the dutycycle of single spin-echo is 70:30.Energising and the release of by conducting and the shutoff of effect pipe BG3, controlling right pulsation coil J2.One end of the source electrode contact resistance R11 of FET BG3, the other end ground connection of resistance R 11.The drain electrode of FET BG3 connects the positive pole of discharge diode D4, the negative pole connection+24V power supply of discharge diode D4.FET BG3 drain electrode is one end of contact resistance R10 simultaneously, the negative pole of the other end connecting luminous diode LED2 of resistance R 10, the positive pole connection+24V power supply of LED 2.In the dead electricity moment of right pulsation coil J2, the back-emf right pulsation coil being produced by diode D4 discharges, and FET BG3 is implemented to protection.For the problem of the stability of further enhancing controller, the grid of being on the scene effect pipe BG2, FET BG3 increases respectively pull down resistor R7, R8, specifically by the grid contact resistance R7 of FET BG2, the other end ground connection of resistance R 7; By the grid contact resistance R8 of FET BG3, the other end ground connection of resistance R 8.

The square-wave signal that the two-way dutycycle of being exported by the 3rd, the 4th NAND gate of IC 2 is 70:30, deliver to respectively FET BG2, BG3, by conducting and the shutoff of effect pipe BG2, BG3, control energising and the release of left and right pulsation coil J1, J2.Two of left and right pulsation coil J1, the alternate conduction of J2 and the circulation of shutoff continuity is exactly the normal operating conditions of two electric pulsators.

Load short-circuit protection circuit comprises FET BG1, resistance R 2, controllable silicon CRT, resistance R 11; one end of the control utmost point contact resistance R11 of controllable silicon CRT; the source electrode that is simultaneously communicated with FET BG2, BG3; the minus earth of controllable silicon CRT; the control utmost point of anodic bonding FET BG1; resistance R 2 one end connection+24V power supplys, the other end connects the control utmost point of FET BG1, and under normal condition, resistance R 2 is controlled the saturation conduction of FET BG1.When there is load short circuits fault, resistance R 2 is again after controlled silicon conducting, to maintain unique path of electric current.

12V working power holding circuit is comprised of the 5th, the 6 two not gate and the FET BG1 of IC 1; 11 pin of IC1 the 5th not gate input connect the positive pole of 12V power supply; 10 pin of IC1 the 5th non-gate output terminal connect 13 pin of IC1 the 6th not gate input, and 12 pin of IC1 the 6th non-gate output terminal connect 1 pin that FET BG1 controls the utmost point.Under normal operating conditions, the input of IC1 the 5th not gate is connected in 12V working power, both the input of the 5th not gate of IC1 was high level, its output is low level, the output of the 5th not gate of IC1 is directly connected on the input of the 6th not gate of IC1, and the output of the 6th not gate of IC1 is high level.The output of the 6th not gate of IC1 directly triggers the control utmost point of FET BG1.Because the control utmost point of FET BG1 has the positively biased threshold voltage of connecting by resistance R 2.FET BG1 has been saturation conduction.The high level of the output of the 6th not gate of IC1 can not affect the duty of FET BG1.But when 12V working power is short-circuited, just there is variation in its duty.Once 12V power circuit is by short circuit, the input of IC1 the 5th not gate has just become low level, and output is high level.The input of IC1 the 6th not gate is directly connected with the output of IC1 the 5th not gate, and the output of IC1 the 6th not gate can be inverted to low level so.When low level goes to trigger the control utmost point of FET BG1, FET BG1 just can end at once.The passage of 12V working power has just been cut off in the cut-off of FET BG1.Three-terminal voltage-stabilizing power supply L7812 and divider resistance R1 with regard to can not be because of the electric current that power source loads short circuit is passed through excessive being burnt.

The present invention passes through by first of IC 1, the second two not gates, resistance R 3, R4, capacitor C 3, the square-wave generator that capacitor C 4 forms produces the square-wave signal that dutycycle is 50:50, through the 3rd, it is contrary that the 4 two not gate is divided into level after processing, the square-wave signal that the two-way dutycycle that frequency is identical is 50:50, two-way square-wave signal is respectively through second of IC 2, the 3rd NAND gate, diode D1, resistance R 5, first of capacitor C 5 and IC 2, the 4th NAND gate, diode D2, resistance R 6, it is that the square-wave signal of 70:30 is delivered to FET BG2 that the circuit delay shaping that capacitor C 6 forms becomes two-way dutycycle, BG3 goes respectively to control left, right pulsation coil J1, the energising of J2 and release.

As in coils any one while being short-circuited of left and right two pulsation, the moment of being on the scene effect pipe BG2 or BG3 conducting, 24V voltage is all added in resistance R 11, in the upper end of resistance R 11, produces pulse signal.This pulse signal makes controllable silicon CRT fast conducting while being added to the control utmost point of controllable silicon CRT; the conducting of controllable silicon CRT has caused the cut-off of FET BG1; cut off the working power of two ICs 1, IC2; IC 1, IC2 are thoroughly quit work; thereby make two FET BG2, BG3 control grid decompression; cause between drain electrode and source electrode and turn-off, two FET BG2, BG3 have obtained protection.The grid of being on the scene effect pipe BG2, FET BG3 increases resistance R 7, R8 in addition, pull down resistor as FET BG2, FET BG3, make FET BG2, FET BG3 when cut-off state, leakage current is less, effectively reduce the temperature rise of FET BG2, FET BG3, improve the stability of controller.

When the 12V working power of IC1, two integrated circuits of IC2 is short-circuited; the 12V working power holding circuit being comprised of IC 1 the 5th, the 6 two not gate and FET BG1 will be sent the signal that allows FET BG1 moment end; allow FET BG1 end; thereby three-terminal voltage-stabilizing power supply L7812 and divider resistance R1 have been protected; after short trouble is got rid of, 12V working power can be recovered at once.

This programme is arranged on the electric pulsation milking machine of same type, sets identical running time, and artificial manufacturing integration IC circuit 1 any one not gate, IC 2 any one NAND gate are damaged in a like fashion, carry out comparative trial.

Embodiment 1: the service condition of the present invention on the electronic controller of electric pulsation milking machine, the circuit diagram of the electronic controller of this electricity pulsation milking machine is Fig. 1, has 12V working power holding circuit in circuit.

Embodiment 2: the service condition of former design circuit on the electronic controller of electric pulsation milking machine, the circuit diagram of the electronic controller of this electricity pulsation milking machine is Fig. 3, in circuit without 12V working power holding circuit.

Comparative test result is as following table:

Claims

1. an electronic controller for electric pulsation milking machine, comprises power circuit, electronic switching circuit and load short-circuit protection circuit, power circuit comprises bridge rectifier block, filter capacitor C1, C2, divider resistance R1 and L7812 three-terminal voltage-stabilizing power supply, square-wave generator in electronic switching circuit is by first of IC 1, the second not gate, resistance R 3, resistance R 4, capacitor C 3, capacitor C 4 forms, the square wave that generation dutycycle is 50:50, the input 1 pin contact resistance R3 of IC 1 first not gate and one end of capacitor C 4, the other end and the capacitor C 3 of output 2 pin contact resistance R3, the other end of capacitor C 3 connects input 3 pin of IC 1 second not gate, resistance R 4, the output 4 pin contact resistance R4 of the second not gate and the other end of capacitor C 4, input 5 pin that simultaneously connect the 3rd not gate, 7 pin ground connection of IC 1, the output of square-wave generator connects the input of IC 1 the 3rd not gate of doing isolation level use, output at the 3rd not gate is divided into the square-wave signal that two-way dutycycle is 50:50, the output of one route IC 1 the 3rd not gate connects the positive pole of diode D1, the negative pole of diode D1 connects the input of IC 2 second NAND gates, the output of the second NAND gate connects the input of IC 2 the 3rd NAND gate, the square-wave signal that is 70:30 by the output output duty cycle of the 3rd NAND gate, the output of IC 2 the 3rd NAND gate connects the control utmost point of FET BG2, by FET BG2, go to control energising and the release of left pulsation coil J1, the output of another route IC 1 the 3rd not gate connects the input of doing the 4th not gate that phase inverter uses, the output of the 4th not gate connects the positive pole of diode D2, the negative pole of diode D2 connects the input of IC 2 first NAND gates, the output of the first NAND gate connects the input of IC 2 the 4th NAND gate, the square-wave signal that is 70:30 by the output output duty cycle of the 4th NAND gate, the output of IC 2 the 4th NAND gate connects the control utmost point of FET BG3, by FET BG3, go to control energising and the release of right pulsation coil J2, FET BG2, the source electrode of BG3 is by resistance R 11 ground connection, load short-circuit protection circuit comprises FET BG1, resistance R 2, controllable silicon CRT, resistance R 11, the control utmost point contact resistance R11 of controllable silicon CRT, the source electrode that is simultaneously communicated with FET BG2, BG3, the minus earth of controllable silicon CRT, the control utmost point of anodic bonding FET BG1, resistance R 2 one end connect the control utmost point of FET BG1 and the anode of controllable silicon CRT, other end connection+24V power supply, it is characterized in that: in this controller, also comprise 12V working power holding circuit, described 12V working power holding circuit is comprised of the 5th, the 6 two not gate and the FET BG1 of IC 1, 11 pin of the 5th not gate input of IC1 connect the positive pole of 12V power supply, 10 pin of IC1 the 5th non-gate output terminal connect 13 pin of IC1 the 6th not gate input, and 12 pin of IC1 the 6th non-gate output terminal connect 1 pin that FET BG1 controls the utmost point.

2. the electronic controller of electric pulsation milking machine according to claim 1, is characterized in that: the model of the IC 1 in described electronic switching circuit is CD4069.