WO2022001206A1 - Circuit de commande et procédé de commande pour mesurer des paramètres de source de lumière - Google Patents

Circuit de commande et procédé de commande pour mesurer des paramètres de source de lumière Download PDF

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Publication number
WO2022001206A1
WO2022001206A1 PCT/CN2021/081734 CN2021081734W WO2022001206A1 WO 2022001206 A1 WO2022001206 A1 WO 2022001206A1 CN 2021081734 W CN2021081734 W CN 2021081734W WO 2022001206 A1 WO2022001206 A1 WO 2022001206A1
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WO
WIPO (PCT)
Prior art keywords
light source
module
control module
main control
parameters
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PCT/CN2021/081734
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English (en)
Chinese (zh)
Inventor
李志荣
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广东奥普特科技股份有限公司
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Publication of WO2022001206A1 publication Critical patent/WO2022001206A1/fr

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    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
    • H05B45/10—Controlling the intensity of the light
    • H05B45/12—Controlling the intensity of the light using optical feedback
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
    • H05B45/30—Driver circuits
    • H05B45/345—Current stabilisation; Maintaining constant current

Definitions

  • the invention belongs to the technical field of semiconductor integrated circuits, and in particular relates to a control circuit and a control method for detecting light source parameters.
  • the light source is the core component of the machine vision industry. With the development of the machine vision industry, people's requirements for the light source in the machine vision equipment have become higher and higher. Light source parameters marked with rated voltage and current can no longer meet the needs of use, and parameters such as instantaneous excess voltage and current and duty cycle need to be marked.
  • the existing light source controller detects the voltage and current of the visual light source through the ADC, which has low accuracy and is greatly affected by temperature.
  • the existing light source controller cannot detect parameters such as excess voltage, current and duty cycle of the visual light source, and can only be set manually.
  • the control circuit of the current visual light source controller has poor control performance and slow response speed, and cannot form a set of control methods for effectively detecting light source parameters.
  • One of the objectives of the present invention is to provide a control circuit for detecting light source parameters in view of the deficiencies of the prior art, which solves the technical problem of how to improve the detection accuracy of visual light source parameters and improves the control ability for detecting light source parameters.
  • a control circuit for detecting light source parameters comprising a light source controller and a visual light source
  • the light source controller is provided with a main control module, a driving module and a communication module
  • the visual light source is provided with a visual light source control module and an LED module
  • the The driving module is respectively connected with the main control module and the LED module
  • the communication module is connected with the main control module and the visual light source control module respectively
  • the visual light source control module is used for storing and outputting the visual light source The voltage parameters, current parameters, and duty cycle parameters of the light source.
  • the main control module is provided with a first control unit, the first control unit is connected with the communication module, and the communication module is an RS485 chip.
  • the visual light source control module is provided with a voltage adjustment unit and a second control unit, the voltage adjustment unit is connected with the power supply end of the light source controller, and the second control unit is connected with the communication module.
  • first control unit and the second control unit are both STM32F103 chips, and the voltage adjustment unit is an LM1117 chip.
  • the visual light source control module is provided with a signal processing unit, and the signal processing unit is respectively connected with the communication module and the second control unit.
  • the signal processing unit is an RS485 chip, and the RS485 chip is respectively connected with the communication module and the second control unit.
  • the driving module is provided with an operational amplifier unit and a power regulation unit, the operational amplifier unit is connected to the power regulation unit, and the operational amplifier unit and the power regulation unit form a negative feedback constant current circuit.
  • the operational amplifier unit is connected to the first control unit, the power control unit is connected to the LED module, and the power control unit is used to increase output power and drive current, and the LED module includes The resistor and several LED lamps are connected in series with the resistor and several LED lamps.
  • the operational amplifier unit is an LM258 operational amplifier chip
  • the power control unit is an N-channel MOS tube
  • the model of the N-channel MOS tube is IRLZ44N.
  • Another object of the present invention is to provide a control method for detecting light source parameters, comprising the following steps:
  • the main control module makes the drive module turn off the output, and the input and output of the communication module are in a high resistance state;
  • S2 make the output of the communication module be a normal output state, and make the communication module send a signal to the visual light source, make the input of the communication module be a normal input state, wait for the signal sent by the visual light source;
  • S3 Determine the type of the signal sent by the visual light source, and the main control module controls the output of the driving module according to the received signal, and controls the operation of the LED module.
  • the main control module parses the received signal command, and controls the drive module according to the parsed information, the The driving module controls the operation of the LED module.
  • the driving module is controlled to turn off the output.
  • the light source controller of the present invention is provided with a main control module, a driving module and a communication module
  • the visual light source is provided with a visual light source control module and an LED module
  • the visual light source control module is used for storing and outputting the visual light source
  • the voltage parameters, current parameters and duty cycle parameters of the visual light source can effectively detect the parameters such as excess voltage, current and duty cycle of the visual light source
  • the drive module is respectively connected with the main control module and the LED module
  • the communication module is respectively connected with the main control module. It is connected with the visual light source control module. Under the control of the main control module, the visual light source control module sends the parameters of the visual light source to the main control module through the communication module.
  • the main control module, the communication module and the visual light source control module have good running stability, The response speed is fast, which significantly improves the detection accuracy of visual light source parameters; 3)
  • the main control module controls the driving module by analyzing the parameters, and the driving module controls the operation of the LED module according to the instructions of the main control module, which meets the control requirements for light source parameters. 4)
  • the control method for detecting light source parameters of the present invention improves the control ability for detecting light source parameters.
  • FIG. 1 is a schematic diagram of the frame of the control circuit of the present invention.
  • FIG. 2 is a schematic circuit diagram of the main control module of the light source controller of the present invention.
  • FIG. 3 is a schematic circuit diagram of the driving module and the communication module of the light source controller of the present invention.
  • FIG. 4 is a schematic circuit diagram of the visual light source of the present invention.
  • FIG. 5 is a flow chart of the control method of the present invention.
  • 1-light source controller 2-visual light source; 11-main control module; 12-drive module; 13-communication module; 21-visual light source control module; 22-LED module.
  • the terms “installation”, “connection”, “connection”, “fixation” and other terms should be understood in a broad sense, for example, it may be a fixed connection or a detachable connection, Or integrally connected; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the internal communication between the two components.
  • installation e.g., it may be a fixed connection or a detachable connection, Or integrally connected; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the internal communication between the two components.
  • a control circuit for detecting light source parameters including a light source controller 1 and a visual light source 2, the light source controller 1 is provided with a main control module 11, a driving module 12 and a communication module 13, and the visual light source 2 is provided with a visual light source control module 21 and LEDs Module 22, the driving module 12 is respectively connected with the main control module 11 and the LED module 22, the communication module 13 is respectively connected with the main control module 11 and the visual light source control module 21, the visual light source control module 21 is used for storing and outputting the voltage of the visual light source 2 parameters, current parameters, duty cycle parameters.
  • the main control module 11 is provided with a first control unit
  • the visual light source control module 21 is provided with a voltage adjustment unit and a second control unit
  • the voltage adjustment unit is connected to the power supply end of the light source controller 1
  • the control units are all connected with the communication module 13, and the communication module 13 is an RS485 chip.
  • the first control unit and the second control unit are both STM32F103 chips
  • the voltage adjustment unit is an LM1117 chip
  • the LM1117 chip can output a fixed voltage
  • the visual light source control module 21 is provided with a signal processing unit, the signal processing unit is an RS485 chip, and the RS485 chip is respectively connected to the communication module 13 and the second control unit.
  • the driving module 12 is provided with an operational amplifier unit and a power regulation unit, and the operational amplifier unit is connected to the power regulation unit.
  • the operational amplifier unit is connected to the first control unit, and the power control unit is connected to the LED module 22 .
  • the operational amplifier unit is an LM258 operational amplifier chip
  • the power control unit is an N-channel MOS tube
  • the model of the N-channel MOS tube is IRLZ44N.
  • the operation process of the present invention includes:
  • the light source controller 1 provides the positive and negative poles of the electrical energy to the LED module 22 in the visual light source 2;
  • the light source controller 1 provides the positive and negative poles of electrical energy to the main control module 21 of the visual light source, and the voltage adjustment unit is connected to the Power+/Power- power supply terminal of the light source controller 1;
  • Data-p/Data-n a pair of differential communication lines between light source controller 1 and visual light source 2;
  • RX/TX the receiving/transmitting line of the data bus between the main control module 11 of the light source controller 1 and the communication module 13;
  • RE-1...N/TE-1...N The output state control line of the communication module 13, the input and output are in the high resistance state by default when powered on.
  • the operation process of the light source controller includes:
  • the main control module 11 of the light source controller 1 turns off the outputs of the N driving modules 12; the STM32F103 chip of the main control module 11 controls RE-1...N/TE-1...N to be high and low respectively
  • the level makes the input and output of the N communication modules 13 in a high resistance state; wherein, the STM32F103 chip of the main control module 11 can make its two internal DAC1 and DAC2 channels output 0V, so that the output current of all the driving modules 12 is 0.
  • the STM32F103 chip of the main control module 11 controls RE-1/TE-1 to output a low level and a high level respectively, so that the output of the first communication module 13 is valid, and sends a signal to the first communication module 13 through the serial port 1 of the communication module 13.
  • Visual light source 2 connected to each communication module 13; control RE-1/TE-1 to output low level to make the input of the first communication module 13 valid, the serial port 1 of the communication module 13 waits for the signal sent by the visual light source 2, if it can If the command is received normally, it means that the visual light source 2 is connected to the first communication module 13.
  • the main control module 11 of the light source controller 1 parses the command according to the received command, and analyzes the voltage, current, duty cycle, etc.
  • the information controls the parameters such as voltage, current and duty output by the first drive module 12, so as to achieve accurate detection and control of the visual light source parameters.
  • the main control module 11 makes the DAC1 channel of the STM32F103 chip output the corresponding voltage according to the parsed current information.
  • the first drive module 12 outputs the corresponding current under the control of the main control module 11; if the return signal from the visual light source 2 is not received after waiting for a period of time, it means that the light source is not inserted, and the DAC1 of the STM32F103 chip of the main control module 11
  • the channel outputs 0V, and the current of the first driving module 12 is 0, thereby controlling the first driving module 12 to turn off the output.
  • the main control module 11 of the light source controller 1 controls RE-1...N/TE-1...N to be high level and low level respectively, so that the input and output of the N communication modules 13 are in a high resistance state.
  • the STM32F103 chip of the main control module 11 controls RE-2/TE-2 to output a low level and a high level respectively, so that the output of the second communication module 13 is valid, and sends a signal to the visual connected to the second communication module 13.
  • the main control module 11 makes the DAC2 channel of the STM32F103 chip output the corresponding voltage according to the parsed current information, and the second drive module 12 in the main control module 11 The corresponding current is output under the control of the main control module 11; if the return signal from the visual light source 2 is not received after waiting for a period of time, it means that the light source is not inserted, the DAC2 channel of the STM32F103 chip of the main control module 11 outputs 0V, and the current of the second drive module 12 is 0, and controls the second driving module 12 to turn off the output.
  • the main control module 11 of the light source controller 1 controls RE-1...N/TE-1...N to be high level and low level respectively, so that the input and output of the N communication modules 13 are in a high resistance state.
  • the main control module 11 of the light source controller 1 controls RE-1...N/TE-1...N so that the input and output of the N communication modules are in a high resistance state. Return to the (2) cycle.
  • the operation process of the visual light source includes:
  • the control signal input of the visual light source control module 21 is valid, wherein, the visual light source control module 21 is provided with the connected STM32F103 chip and the RS485 chip, and the STM32F103 chip controls the RS485 RE/DE are both low level to make the signal input valid.
  • a control method for detecting light source parameters comprising the following steps:
  • the main control module 11 makes the drive module 12 turn off the output, and the input and output of the communication module 13 are in a high resistance state;
  • the main control module 11 makes the output of the communication module 13 be in a normal output state, and makes the communication module 13 send a signal to the visual light source 2, the main control module 11 makes the input of the communication module 13 in a normal input state, and waits for the visual light source 2 to send over.
  • Signal ;
  • the main control module 11 parses the received signal command, and controls the driving module 12 according to the parsed information, and the driving module 12 controls the LED module 22
  • the visual light source control module 21 of the visual light source 2 correctly receives the signal sent by the communication module 13 , it can send the voltage, current and duty cycle parameters of the visual light source 2 to the main control module 11 .
  • the control driver module 12 is controlled to turn off the output, and the LED module 22 does not operate.
  • the existing circuit can no longer meet the requirement of marking the rated voltage and current of the light source parameters, and can not mark parameters such as instantaneous excess voltage, current and duty cycle, and the visual light source control module 21 of the present invention can store and output the visual light source 2
  • the voltage parameters, current parameters, duty cycle parameters of the visual light source 2 effectively detect the parameters such as excess voltage, current and duty cycle of the visual light source 2, and the operation stability of the main control module 11, the communication module 13 and the visual light source control module 21 is It has good performance and fast response speed, thereby significantly improving the detection accuracy of visual light source parameters and improving the control ability of light source parameter detection.

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  • Circuit Arrangement For Electric Light Sources In General (AREA)
  • Led Devices (AREA)

Abstract

La présente invention concerne un circuit de commande pour mesurer des paramètres de source de lumière, comprenant un dispositif de commande de source de lumière et des sources de lumière visuelles. Le dispositif de commande de source de lumière est pourvu d'un module de commande maître, de modules d'entraînement et de modules de communication. Chacune des sources de lumière visuelle est pourvue d'un module de commande de source de lumière visuelle et d'un module de DEL, chaque module d'entraînement étant connecté séparément au module de commande maître, au module de commande de source de lumière visuelle et au module de DEL ; chaque module de communication est connecté séparément au module de commande maître et au module de commande de source de lumière visuelle ; et le module de commande de source de lumière visuelle est utilisé pour stocker et délivrer un paramètre de tension, un paramètre de courant et un paramètre de rapport cyclique de la source de lumière visuelle. La présente invention résout le problème technique concernant la manière d'améliorer la précision de mesure de paramètres de source de lumière visuelle et améliore la capacité de commande pour la mesure des paramètres de source de lumière. La présente invention concerne en outre un procédé de commande pour mesurer des paramètres de source de lumière.
PCT/CN2021/081734 2020-07-03 2021-03-19 Circuit de commande et procédé de commande pour mesurer des paramètres de source de lumière WO2022001206A1 (fr)

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