Ultrahigh bright flash control system for machine vision light source

Abstract

The invention provides an ultra-bright flash control system for a machine vision light source, which comprises a power supply, a controller, a power supply circuit and a control circuit, and is characterized in that the power supply can output different voltages to respectively supply power to the controller, the power supply circuit and the control circuit, and the power supply supplies power to the light source through the power supply circuit; the output end, connected with the power supply circuit, of the power source is a first output end, the controller controls on-off of the light source through the control circuit, the power supply circuit comprises an operational amplifier U9A and an MOS tube U7, the MOS tube U7 is a PMOS tube, the positive input end of the operational amplifier U9A is connected with the 65V output end of the power source through a first circuit, and the negative input end of the operational amplifier U9A is connected with the 65V output end of the power source through a second circuit. The output end of the operational amplifier U9A is connected with the grid electrode of the MOS tube U7 through a second circuit, the source electrode of the MOS tube U7 is connected with the first output end through a third circuit, a resistor R26 is arranged on the third circuit, the negative input end of the MOS tube U7 is connected to the part, located between the MOS tube U7 and the resistor R26, of the third circuit through a fourth circuit, and the drain electrode of the MOS tube U7 is connected with a first wiring end.

Description

Technical Field

[0001] The present invention relates to the field of machine vision, and in particular to an ultra-bright flash control system for a machine vision light source. Background Art

[0002] When inspecting diamond wires, machine vision is often used. When using cameras to shoot, it is necessary to ensure that the light source has a high brightness. At the same time, in order to improve the inspection efficiency, the speed of the diamond wire movement needs to be increased, which requires the speed of shooting to be increased, and the fill light needs to be able to switch on and off quickly. Currently, software control is mostly used, but when the speed reaches a certain value, the software is difficult to meet the requirements and is prone to failure. Summary of the invention

[0003] The main purpose of the present invention is to provide an ultra-bright flash control system for machine vision light sources to solve the above technical problems.

[0004] In order to achieve the above purpose, the technical solution adopted by the present invention is: an ultra-bright flash control system for machine vision light sources, including a power supply, a controller, a power supply circuit and a control circuit. The power supply can output different voltages to respectively power the controller, the power supply circuit and the control circuit. The power supply supplies power to the light source through the power supply circuit. The output end of the power supply connected to the power supply circuit is the first output end. The controller controls the switch of the light source through the control circuit. The power supply circuit includes an operational amplifier U9A and a MOS tube U7. The MOS tube U7 is a PMOS tube. The positive input end of the operational amplifier U9A is connected to the 65V output end of the power supply through the first circuit. The output end of the operational amplifier U9A is connected to the gate of the MOS tube U7 through the second circuit. The source of the MOS tube U7 is connected to the first output end through the third circuit. A resistor R26 is provided on the third circuit. The negative input end of the MOS tube U7 is connected to the part of the third circuit located between the MOS tube U7 and the resistor R26 through the fourth circuit. The drain of the MOS tube U7 is connected to the first terminal.

[0005] Preferably, the power supply circuit also includes a fifth circuit, one end of the fifth circuit is connected to the first output end, and the other end is grounded, a capacitor C22 is arranged on the fifth circuit, a diode D4 is arranged on the fifth circuit and located between the capacitor C22 and the power supply, the diode D4 is unidirectionally conducted in the direction from the capacitor C22 toward the power supply, a second terminal is arranged on the part of the fifth circuit located between the capacitor C22 and the diode D4, and the second terminal is electrically connected to the first terminal.

[0006] Preferably, the power supply circuit further includes an eleventh circuit, one end of the eleventh circuit is connected to the first output end, a resistor R13, a resistor R21, and a resistor R28 are connected in series on the first circuit, and the first circuit is connected to the portion of the eleventh circuit located between the resistor R13 and the resistor R21.

[0007] Preferably, a twelfth circuit is further provided on the first output end, the other end of the twelfth circuit is grounded, and a capacitor C29 and a capacitor C30 are connected in parallel to the twelfth circuit.

[0008] Preferably, the power supply circuit also includes a seventh circuit, one end of the seventh circuit is connected to an interface of the wiring terminal, and the other end is connected to the second wiring terminal through the third wiring terminal. The wiring terminal J1 is used to install the light-emitting body, and the other interface of the wiring terminal is connected to the eighth circuit.

[0009] Preferably, the control circuit includes a MOSFET driver U15 and a MOS tube Q1, the input end of the MOSFET driver is connected to the controller, the output end of the MOSFET driver U15 is connected to the gate of the MOS tube Q1 through a sixth circuit, and the controller can control the on and off of the MOS tube Q1 by controlling its input to the MOSFET driver U15; the drain of the MOS tube Q1 is connected to the other end of the eighth circuit, the source of the MOS tube Q1 is grounded through a ninth circuit, and a resistor R55 is provided on the ninth circuit.

[0010] Preferably, a resistor R49 and a diode D6 are connected in parallel between the seventh circuit and the eighth circuit, and the diode D6 is unidirectionally conductive in a direction from the eighth circuit to the seventh circuit.

[0011] Compared with the prior art, the present invention has the following beneficial effects:

[0012] The present invention can realize the control of the power supply circuit through the control circuit, realize the frequent switching of the same light source through the circuit form, and realize the control of the light source switch. At the same time, the light source adopts a 65V voltage input, and the current will increase rapidly at the moment the circuit is turned on, thereby realizing the high-brightness operation of the light source. The flashing of the light source is realized by frequent switching and the high-brightness operation of the light source. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is the interface diagram of the controller;

[0014] Figure 2 It is a circuit diagram of the power supply circuit;

[0015] Figure 3 It is a voltage divider circuit;

[0016] Figure 4is a circuit diagram of capacitor C22 and the circuit connected thereto;

[0017] Figure 5 It is a circuit diagram in which capacitors C29 and C30 are connected;

[0018] Figure 6 It is the circuit diagram of the control circuit. DETAILED DESCRIPTION

[0019] The following description is used to disclose the present invention so that those skilled in the art can implement the present invention. The preferred embodiments described below are only examples, and those skilled in the art may think of other obvious variations.

[0020] like Figure 1-6 As shown, a super bright flash control system for machine vision light source, the control system is used to control the switch of the light source, including a power supply, a controller, a power supply circuit and a control circuit, the power supply can output different voltages to respectively power the controller, the power supply circuit and the control circuit, the power supply supplies power to the light source through the power supply circuit, and the control circuit is used to control the switch of the light source. Specifically, the power supply can output 65V, 12V and 3.3V voltages.

[0021] The power supply circuit includes an operational amplifier U9A and a MOS tube U7, wherein the MOS tube U7 is a PMOS tube, the positive input terminal of the operational amplifier U9A is connected to the 65V output terminal of the power supply through the first circuit 1, the output terminal of the operational amplifier U9A is connected to the gate (G pole) of the MOS tube U7 through the second circuit 2, the source (S pole) of the MOS tube U7 is connected to the 65V output terminal of the power supply through the third circuit 3, a resistor R26 is provided on the third circuit 3, and the negative input terminal of the MOS tube U7 is connected to the portion of the third circuit 3 between the MOS tube U7 and the resistor R26 through the fourth circuit 4. The drain (D pole) of the MOS tube U7 is connected to the first terminal 6.

[0022] The power supply circuit further includes a fifth circuit 10, one end of which is connected to the 65V output terminal of the power supply, and the other end is grounded. A capacitor C22 is provided on the fifth circuit 19, and a diode D4 is provided on the fifth circuit 19 and between the capacitor C22 and the power supply. The diode D4 is unidirectionally conducted in the direction from the capacitor C22 to the power supply. A second terminal 8 is provided on the portion of the fifth circuit 10 located between the capacitor C22 and the diode D4, and the second terminal 8 is electrically connected to the first terminal 6. When the circuit is operating normally, the diode D4 can prevent the current from directly charging the capacitor C22 through the fifth circuit 10. When the power supply is turned off, since the voltage at the power supply is 0 at this time, the capacitor C22 can be discharged in the direction of the power supply through the fifth circuit 10.

[0023] The power supply circuit also includes an eleventh circuit 17, one end of the eleventh circuit 17 is connected to the 65V output end of the power supply, and a resistor R13, a resistor R21, and a resistor R28 are connected in series on the first circuit 17. The first circuit 1 is connected to the portion of the eleventh circuit 17 located between the resistor R13 and the resistor R21, and the voltage of the positive input end of the operational amplifier U9A is equal to the voltage of the portion located between the resistor R13 and the resistor R21 on the eleventh circuit 17. When the voltage difference between the positive input end and the negative input end of the operational amplifier U9A exceeds a certain value, the output of the operational amplifier U9A exceeds the turn-on voltage of the MOS tube U7, so that the MOS tube U7 is turned on, the third circuit 3 is turned on, and the power supply can charge the capacitor C22. When the voltage difference between the positive input end and the negative input end of the operational amplifier U9A is less than a certain value, the output voltage of the operational amplifier U9A is less than the turn-on voltage of the MOS tube U7, and then the MOS tube U7 is disconnected, and the third circuit 3 is disconnected. That is, the third circuit 3 is controlled to be turned on or off by the voltage fed back from the third circuit 3, so that the voltage on the third circuit 3 is kept as constant as possible.

[0024] A twelfth circuit 18 is also provided at the 65V output end of the power supply, the other end of the twelfth circuit 18 is grounded, and capacitors C29 and C30 are connected in parallel to the twelfth circuit 18. Capacitors C29 and C30 can ensure the stability of the output voltage at the 65V output end of the power supply.

[0025] The power supply circuit also includes a seventh circuit 13, one end of the seventh circuit 13 is connected to an interface of the wiring terminal J1, and the other end is connected to the second wiring terminal 8 through the third wiring terminal 12. The wiring terminal J1 is used to install an LED lamp, and the other interface of the wiring terminal J1 is connected to the eighth circuit 14.

[0026] The control circuit includes a MOSFET driver U15 and a MOS tube Q1. The input end of the MOSFET driver is connected to the controller. The output end of the MOSFET driver U15 is connected to the gate G of the MOS tube Q1 through the sixth circuit 11. The controller can control the on and off of the MOS tube Q1 by controlling its input to the MOSFET driver U15. The drain D of the MOS tube Q1 is connected to the other end of the eighth circuit 14. The source S of the MOS tube Q1 is grounded through the ninth circuit 15. A resistor R55 is arranged on the ninth circuit 15. When the MOS tube Q1 is turned on, the seventh circuit 13, the eighth circuit 14, and the ninth circuit 15 form a path, and the capacitor C22 can output a voltage to power the LED lamp.

[0027] A resistor R49 and a diode D6 are connected in parallel between the seventh circuit 13 and the eighth circuit 14. The resistor R49 is a dummy load for providing a stable load for the diode D6. The diode D6 is unidirectionally conducted in the direction from the eighth circuit 14 to the seventh circuit 13 for current reflux when the power is cut off.

[0028] In practice, there are four LED lamps, and the four LED lamps have different shooting angles, which are used to fill in the light for cameras in different positions, so as to shoot different positions of the inspected workpiece. Each LED lamp corresponds to a power supply circuit and a control circuit. Preferably, the two control circuits can share a MOSFET driver U15. The MOSFET driver U15 adopts a dual MOSFET driver with two input terminals and two output terminals. The controller can send control signals to the two input terminals of the MOSFET driver U15 respectively to control the light source switch and realize fast switching of different light sources. Of course, the number of LED lamps can also be adjusted according to actual conditions, and the light source can also adopt non-LED lamps.

[0029] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions only describe the principles of the present invention. The present invention may be subject to various changes and improvements without departing from the spirit and scope of the present invention. These changes and improvements fall within the scope of the present invention. The scope of protection claimed by the present invention is defined by the attached claims and their equivalents.

Claims

1. An ultra-bright flash control system for machine vision light sources, characterized in that: The invention comprises a power supply, a controller, a power supply circuit and a control circuit. The power supply can output different voltages to respectively supply power to the controller, the power supply circuit and the control circuit. The power supply supplies power to the light source through the power supply circuit. The output end of the power supply connected to the power supply circuit is the first output end. The controller controls the switch of the light source through the control circuit. The power supply circuit comprises an operational amplifier U9A and a MOS tube U7. The MOS tube U7 is a PMOS tube. The positive input end of the operational amplifier U9A is connected to the 65V output end of the power supply through the first circuit. The output end of the operational amplifier U9A is connected to the gate of the MOS tube U7 through the second circuit. The source of the MOS tube U7 is connected to the first output end through the third circuit. A resistor R26 is arranged on the third circuit. The negative input end of the MOS tube U7 is connected to the part of the third circuit located between the MOS tube U7 and the resistor R26 through the fourth circuit. The drain of the MOS tube U7 is connected to the first terminal.

2. The ultra-bright flash control system for machine vision light source according to claim 1, characterized in that: The power supply circuit also includes a fifth circuit, one end of the fifth circuit is connected to the first output end, and the other end is grounded, a capacitor C22 is arranged on the fifth circuit, a diode D4 is arranged on the fifth circuit and between the capacitor C22 and the power supply, the diode D4 is unidirectionally conducted in the direction from the capacitor C22 to the power supply, a second terminal is arranged on the part of the fifth circuit located between the capacitor C22 and the diode D4, and the second terminal is electrically connected to the first terminal.

3. The ultra-bright flash control system for machine vision light source according to claim 1, characterized in that: The power supply circuit also includes an eleventh circuit, one end of the eleventh circuit is connected to the first output end, a resistor R13, a resistor R21, and a resistor R28 are connected in series on the first circuit, and the first circuit is connected to the portion of the eleventh circuit located between the resistor R13 and the resistor R21.

4. The ultra-bright flash control system for machine vision light source according to claim 1, characterized in that: A twelfth circuit is also provided on the first output end, the other end of the twelfth circuit is grounded, and a capacitor C29 and a capacitor C30 are connected in parallel to the twelfth circuit.

5. The ultra-bright flash control system for machine vision light source according to claim 2, characterized in that: The power supply circuit also includes a seventh circuit, one end of the seventh circuit is connected to an interface of the wiring terminal, and the other end is connected to the second wiring terminal through the third wiring terminal. The wiring terminal J1 is used to install the light-emitting body, and the other interface of the wiring terminal is connected to the eighth circuit.

6. The ultra-bright flash control system for machine vision light source according to claim 5, characterized in that: The control circuit includes a MOSFET driver U15 and a MOS tube Q1, the input end of the MOSFET driver is connected to the controller, the output end of the MOSFET driver U15 is connected to the gate of the MOS tube Q1 through the sixth circuit, and the controller can control the on and off of the MOS tube Q1 by controlling its input to the MOSFET driver U15; the drain of the MOS tube Q1 is connected to the other end of the eighth circuit, the source of the MOS tube Q1 is grounded through the ninth circuit, and a resistor R55 is arranged on the ninth circuit.

7. The ultra-bright flash control system for machine vision light source according to claim 6, characterized in that: A resistor R49 and a diode D6 are connected in parallel between the seventh circuit and the eighth circuit. The diode D6 is unidirectionally conductive in a direction from the eighth circuit to the seventh circuit.

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