CN101748536B

CN101748536B - Needle selector drive plate of electronic jacquard machine and control method

Info

Publication number: CN101748536B
Application number: CN2009101557581A
Authority: CN
Inventors: 胡钦彤; 沈炜
Original assignee: HANGZHOU SENHUI ELECTRIC JACQUARD CO Ltd
Current assignee: HANGZHOU SENHUI ELECTRIC JACQUARD CO Ltd
Priority date: 2009-12-25
Filing date: 2009-12-25
Publication date: 2012-04-25
Anticipated expiration: 2029-12-25
Also published as: CN101748536A

Abstract

The invention relates to a needle selector drive plate of an electronic jacquard machine, which comprises an FPGA processing unit, a comparator, a feedback circuit and a power drive circuit. The FPGA processing unit consists of FPGA and comprises an input signal port, an output signal port, a clock circuit and a string input interface; a conduction frequency control unit with fixed switching frequency for conduction control is arranged in the FPGA processing unit; the power drive circuit consists of a field-effect tube; the output signal of the FPGA processing unit drives the field-effect tube, a power supply is connected with the field-effect tube through a needle selector electromagnetic coil and the field-effect tube is connected to the negative end of the power supply through a sampling resistor, a current signal flowing through the needle selector electromagnetic coil is acquired at the sampling resistor, and the current signal is fed back to the FPGA processing unit through the comparator to drive shutoff control; and the electrical energy in the needle selector electromagnetic coil maintains the current through a fly-wheel diode. The needle selector drive plate of the electronic jacquard machine has the advantages that the constant current work of the electromagnetic needle selector is implemented through modern electronic technology and new control concepts so that the performance of the electronic jacquard machine is greatly improved.

Description

A kind of needle selector drive plate of electronic jacquard machine and control method

Technical field

The present invention relates to the Weaving device field, mainly is a kind of needle selector drive plate of electronic jacquard machine and control method.

Background technology

Electronic jacquard machine is the key equipment of jacquard fabric, and along with expanding economy, people improve constantly quality of life, and jacquard fabric has wide prospect.And the core component of electronic jacquard machine is the needle selection device; And corresponding needle selection device drive plate; The type of drive of traditional electromagnetic needle selection drive plate is a constant voltage driving; This can bring the reliably working of many problems affect jacquards, like the temperature of environment, and the temperature rise after its work of electromagnetic needle selection and the problem of energy consumption.

Summary of the invention

The present invention seeks in the deficiency that overcomes traditional electromagnetic needle selector control mode; And a kind of needle selector drive plate of electronic jacquard machine and control method are provided; Constitute special-purpose processor with fpga chip; Handle input/output signal and feedback signal, utilize the energy storage effect of solenoid and conducting control realization constant current fast.

The present invention solves the technical scheme that its technical problem adopts: this needle selector drive plate of electronic jacquard machine; Comprise FPGA processing unit, comparator, feedback circuit and power driving circuit; Said FPGA processing unit is made up of FPGA; Comprise input signal mouth, output signal port, clock circuit and string input interface, the turn-on frequency control module that has a fixing switching frequency to carry out conducting control in the FPGA processing unit, power driving circuit is made up of FET; Wherein the output signal of FPGA processing unit drives FET; Power supply connects FET through needle selection device solenoid and arrives power supply negative terminal through sampling resistor; From sampling resistor obtain the to flow through current signal of needle selection device solenoid, through comparator and feed back to the FPGA processing unit and drive and turn-off control; Electric energy in the needle selection device solenoid is kept electric current through the afterflow diode.

Said FPGA processing unit, control mode is output as the N*8 road, each Lu Youyi comparator, a power driving circuit, one group of sampling resistor and comparison control circuit and holding circuit.

The control method of needle selector drive plate of electronic jacquard machine of the present invention, this method comprises the steps:

1, through the inner serial input circuit of FPGA processing unit, accept serial needle selection data, and completion is shifted and latchs in inside, accepts the output enable signal of upper level control module from the upper level controller;

2, the FPGA processing unit outputs control signals to FET, makes the FET conducting, and electric current flows through FET and sampling resistor to power supply negative terminal from the power supply needle selection device solenoid of flowing through, and current sampling signal inputs to comparator;

3, reach setting value when electric current, comparator output signal turn-offs FET to the FPGA processing unit, and the electric energy that needle selection device solenoid stores is through the release of afterflow diode, and needle selection device solenoid continues to keep suction;

4, before the output enable signal is not cancelled; The turn-on frequency control module makes the conducting of FPGA processing unit output control FET again, makes the electric current needle selection device solenoid of flowing through again, the work that goes round and begins again like this; Up to the enable signal cancellation, realize constant current control.

As preferably, said FPGA processing unit each enable signal effectively before, single-path testing needle selection device solenoid is respectively judged the quality of electromagnetic needle selector from the inverse signal that obtains, and returns status signal to the upper level control module.

The effect that the present invention is useful: the present invention is through modern electronic technology and new control theory, thereby realization electromagnetic needle selector constant current work improves the performance of electronic jacquard machine greatly.

Description of drawings

Fig. 1 is the schematic block circuit diagram of needle selector drive plate of electronic jacquard machine of the present invention.

Description of reference numerals: turn-on frequency control module 1, FPGA processing unit 2, comparator 3, sampling resistor 4, FET 5, needle selection device solenoid 6, afterflow diode 7.

The specific embodiment

Below in conjunction with accompanying drawing the present invention is done further detailed explanation.

As shown in Figure 1; This needle selector drive plate of electronic jacquard machine; Comprise FPGA processing unit 2, comparator 3, feedback circuit 8 and power driving circuit, said FPGA processing unit 2 is made up of FPGA, comprises input signal mouth, output signal port, clock circuit and string input interface; Input signal adopts the mode of serial code, handles in the FPGA and realizes being shifted and latching.The turn-on frequency control module 1 that has a fixing switching frequency to carry out conducting control in the FPGA processing unit 2, power driving circuit is made up of FET 5; Wherein the output signal of FPGA processing unit 2 drives FET 5; Power supply connects FET 5 through needle selection device solenoid 6 and arrives power supply negative terminal through sampling resistor 4; From sampling resistor 4 obtain the to flow through current signal of needle selection device solenoid 6, through comparator 3 and feed back to FPGA processing unit 2 and drive and turn-off control; Electric energy in the needle selection device solenoid 6 is kept electric current through afterflow diode 7, and the Continuity signal of next cycle makes solenoid regain electric energy, and the carrying out of going round and beginning again like this accomplished constant current control.

Said FPGA processing unit 2, control mode is output as the N*8 road, 3, one power driving circuits of each Lu Youyi comparator, one group of sampling resistor 4 and comparison control circuit and holding circuit.

The control method of this needle selector drive plate of electronic jacquard machine according to the invention comprises the steps:

1, through the serial input circuit of FPGA processing unit 2 inside, accept serial needle selection data, and completion is shifted and latchs in inside, accepts the output enable signal of upper level control module from the upper level controller;

2, FPGA processing unit 2 output control signals (PWM end) are to FET 5, make FET 5 conductings, and electric current is from the power supply needle selection device solenoid 6 of flowing through, and flow through FET 5 and sampling resistor 4 arrives power supply negative terminal, and current sampling signal inputs to comparator 3;

3, reach setting value when electric current, comparator 3 outputs signal to FPGA processing unit 2, turn-offs FET 5, and the electric energy that needle selection device solenoid 6 stores is through 7 releases of afterflow diode, and needle selection device solenoid 6 continues to keep suction;

4, before output enable signal (OE) is not cancelled; Turn-on frequency control module 1 makes 5 conductings of FPGA processing unit 2 outputs (PWM) control FET again; Make the electric current needle selection device solenoid 6 of flowing through again; The work that goes round and begins again like this up to enable signal (OE) cancellation, realizes constant current control.

5, said FPGA processing unit 2 each enable signal (OE) effectively before, single-path testing needle selection device solenoid 6 is respectively judged the quality of electromagnetic needle selector from the inverse signal that obtains, and returns status signal to the upper level control module.

Above-mentioned embodiment and embodiment; Just for a kind of specific embodiment of principle of the present invention is described; But protection scope of the present invention is not limited thereto, and any technical staff who is familiar with the present technique field is in the technical scheme of public publish of the present invention; Small improvement variation and the adaptability revision that can expect easily all should be encompassed within protection scope of the present invention.Therefore, protection scope of the present invention is as the criterion with the claim specification.

Claims

1. the control method of a needle selector drive plate of electronic jacquard machine, it is characterized in that: this method comprises the steps:

(1), through the inner serial input circuit of FPGA processing unit (2), accept serial needle selection data, and accomplish displacement in inside and latch from the upper level controller, accept the output enable signal of upper level control module;

(2), FPGA processing unit (2) outputs control signals to FET (5); Make FET (5) conducting; Electric current flows through FET (5) and sampling resistor (4) to power supply negative terminal from the power supply needle selection device solenoid (6) of flowing through, and current sampling signal inputs to comparator (3);

(3), when electric current reaches setting value, comparator (3) outputs signal to FPGA processing unit (2), turn-offs FET (5), the electric energy that needle selection device solenoid (6) stores is through afterflow diode (7) release, needle selection device solenoid (6) continues to keep suction;

(4), before the output enable signal is not cancelled; Turn-on frequency control module (1) makes the conducting of FPGA processing unit (2) output control FET (5) again, makes the electric current needle selection device solenoid (6) of flowing through again, the work that goes round and begins again like this; Up to the enable signal cancellation, realize constant current control.

2. the control method of needle selector drive plate of electronic jacquard machine according to claim 1; It is characterized in that: said FPGA processing unit (2) is before each enable signal is effective; Difference single-path testing needle selection device solenoid (6); Judge the quality of electromagnetic needle selector from the inverse signal that obtains, and return status signal to the upper level control module.