Electronic jacquard machine jacquard weave transfer of data fault and solenoid valve failure testing circuit
Technical field
The present invention relates to a kind of electronic jacquard machine jacquard weave transfer of data fault and solenoid valve failure testing circuit.
Background technology
Along with the deep application in textile industry of electronics industry, people are to having proposed Secretary to the textile industry individualized development.The fast development of loom has promoted the development of the jacquard attachment that matches with it, and the high-performance jacquard is the important directions of modern textile development, and fabric quality is significant for improving; Electronic jacquard machine is a kind of electromechanical integrated product that utilizes the different warp thread of shades of colour, weft yarn to be intertwined to form the big-pattern tissue fabric, and electronic jacquard machine and loom match, and can weave various big-pattern jacquard fabrics.The core of electronic jacquard machine is the electronic needle selecting module, jacquard needle selecting module and needle lifting mechanism are separated from each other, the opening of jacquard mainly relies on the suction of the electromagnetic valve of needle selection module to put to control the needle element and realizes with the moving up and down of needle lifting mechanism, and each used digitalized needle selecting machine of jacquard is comprised of 8 identical electromagnetic needle selection unit.Each needle selection module is equipped with a control panel, and existing slide cam selector control panel comprises data transmission module and needle selection module.The 74HC595 chip is the shift register with serial input, 8 Bits Serial or parallel output.Shift register can receive and export simultaneously serial signal under the effect of shift clock.Jacquard loom controller sends the serial shift data to the 74HC595 chip under the interrupt signal effect, under the control of data latch clock and output enable, send parallel control signal to the electronic needle selecting module.ULN2803 is the driving element of slide cam selector electromagnetic valve, is comprised of eight NPN Darlington transistors, and its design is compatible with standard TTL series.8 common cathode diodes of its chip internal can be used for absorbing inductance current, therefore are fit to very much the driving of electromagnet.It is the 500mA measuring and calculating that the maximum of the colelctor electrode of each Darlington transistor allows by electric current, and the electric current that needs during electromagnetic actuation is approximately 40mA, and the output parallel signal of 74Hc595 is not enough to drive the adhesive of slide cam selector electromagnet.Therefore select ULN2803 as the adhesive of current driving element control digitalized needle selecting machine electromagnet.
Most of textile machine company that produces jacquard adopts above needle selection module both at home and abroad, but with upper module three problems is arranged:
1, the data of 74HC595 transmission might the loopback mistake under strong electromagnetic.
2, the possible problem of electromagnetic valve used of jacquard is that above needle selection modular circuit can't detect electromagnetic valve because quality problems are blown.
For above-mentioned two problems, common practices all is to select preferably components and parts, does the component reliability test, by again installation after the test.But the jacquard needle selecting module breaks down in the course of the work and can't detect also and can't judge, jacquard works on, and very late, loss is sure when waiting artificial discovery, and the quality of fabric can not be guaranteed at all.
Summary of the invention
The object of the present invention is to provide a kind of transfer of data accuracy rate that guaranteed, electronic jacquard machine jacquard weave transfer of data fault and the solenoid valve failure testing circuit that can detect online.
Technical solution of the present invention is:
A kind of electronic jacquard machine jacquard weave transfer of data fault and solenoid valve failure testing circuit, the data transmission module, the needle selection module that comprise the slide cam selector control panel, it is characterized in that: the Q7' output of all cascade shift transport chip 74HC595 of data transmission module and on a unilateral diode, the other end of all diodes also directly links to each other, and consists of a circuit-switched data bus and points to controller; The needle selection module directly connects first resistance (R1) with power supply and links to each other with the base stage of triode (Q1), and the emitter stage of triode (Q1) links to each other with the output and the electromagnetic valve that drive chip; The colelctor electrode of triode (Q1) links to each other with the input of the second resistance (R2) and phase inverter (U5), and the power supply of the second resistance (R2) and needle selection module links to each other, and the output of phase inverter (U5) links to each other with nor gate (U6) input; Behind the system boot, controller at first sends a string data FF, all be 1, when from the displacement output (Q7') of 74HC595 if the data that continuous diode sends on the bus have one not to be 1, that never is that first local later chip of 1 may be to damage, the transmission of data again can be judged from hardware the accuracy of transfer of data thus; When jacquard normally moves; if there is an electromagnetic valve to blow suddenly; at this moment triode (Q1) base current raises in the circuit, the triode conducting, and the input of phase inverter (U5) is dragged down; high level of phase inverter output; as long as it is high level that nor gate U6 has one input, the output of that U6 is high level just, can provide an interrupt signal for controller like this; prompting has electromagnetic valve to blow, system-down.
Described driving chip is uln2803 or uln2804.
The present invention is rational in infrastructure, can will can detect online the accuracy of jacquard weave transfer of data, and the inline diagnosis solenoid valve failure.When system normally moved, foregoing circuit was not worked.Have transfer of data incorrect in the elected needle mould piece, or electromagnetic valve is blown, foregoing circuit is worked at once and is produced an interrupt notification controller, and stops in emergency, and the fault with system's appearance has than fast-response.
Description of drawings
The invention will be further described below in conjunction with drawings and Examples.
Fig. 1 is the structural representation of one embodiment of the invention.
The specific embodiment
A kind of electronic jacquard machine jacquard weave transfer of data fault and solenoid valve failure testing circuit, the data transmission module, the needle selection module that comprise the slide cam selector control panel, it is characterized in that: the Q7' output of all cascade shift transport chip 74HC595 of data transmission module and on a unilateral diode, the other end of all diodes also directly links to each other, and consists of a circuit-switched data bus and points to controller; The needle selection module directly connects first resistance (R1) with power supply and links to each other with the base stage of triode (Q1), and the emitter stage of triode (Q1) links to each other with the output and the electromagnetic valve that drive chip; The colelctor electrode of triode (Q1) links to each other with the input of the second resistance (R2) and phase inverter (U5), the power supply of the second resistance (R2) and needle selection module (+15V) linking to each other, the output of phase inverter (U5) links to each other with nor gate (U6) input; Behind the system boot, controller at first sends a string data FF, all be 1, when from the displacement output (Q7') of 74HC595 if the data that continuous diode sends on the bus have one not to be 1, that never is that first local later chip of 1 may be to damage, the transmission of data again can be judged from hardware the accuracy of transfer of data thus; When jacquard normally moved, if there is an electromagnetic valve to blow suddenly, at this moment triode (Q1) base current raise in the circuit; the triode conducting; the input of phase inverter (U5) is dragged down, and high level of phase inverter output is high level as long as nor gate U6 has one input; the output of that U6 is high level just; like this can be for controller provide an interrupt signal, prompting has electromagnetic valve to blow, system-down; avoid loss, improve the quality of fabric.
Described driving chip is uln2803 or uln2804.