CN111800906A - Control circuit and control method for detecting light source parameters - Google Patents
Control circuit and control method for detecting light source parameters Download PDFInfo
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- CN111800906A CN111800906A CN202010631413.5A CN202010631413A CN111800906A CN 111800906 A CN111800906 A CN 111800906A CN 202010631413 A CN202010631413 A CN 202010631413A CN 111800906 A CN111800906 A CN 111800906A
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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
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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]
- H05B45/30—Driver circuits
- H05B45/345—Current stabilisation; Maintaining constant current
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Abstract
The invention belongs to the technical field of semiconductor integrated circuits, and particularly relates to a control circuit for detecting light source parameters, which comprises a light source controller and a light source, wherein the light source controller is provided with a main control module, a driving module and a communication module, the light source is provided with a light source control module and an LED module, the driving module is respectively connected with the main control module and the LED module, the communication module is respectively connected with the main control module and the light source control module, and the light source control module is used for storing and outputting voltage parameters, current parameters and duty ratio parameters of the light source. The invention increases the light source parameter detection items and improves the detection precision of the light source parameters. Meanwhile, the invention also provides a control method for detecting the light source parameters.
Description
Technical Field
The invention belongs to the technical field of semiconductor integrated circuits, and particularly relates to a control circuit and a control method for detecting light source parameters.
Background
The light source is a core component of the machine vision industry, the requirements of people on the light source in the machine vision equipment become higher and higher along with the development of the machine vision industry, and the inventor finds that the existing light source parameter marking rated voltage and current cannot meet the use requirements along with the gradual increase of the functions of the light source, and also needs to mark parameters such as instantaneous excess voltage and current, duty ratio and the like.
The existing light source controller detects the voltage and the current of a light source through an ADC (analog to digital converter), the detection mode has low precision and is greatly influenced by temperature, and the control circuit of the existing light source controller has low response speed. In addition, the existing light source controller cannot detect parameters such as excess voltage and current, duty ratio and the like of the light source and can only be set in a manual mode.
Therefore, a novel light source control circuit and a control method are needed to solve the above problems.
Disclosure of Invention
One of the objects of the present invention is: aiming at the defects of the prior art, the control circuit for detecting the light source parameters is provided, the technical problem of how to improve the detection precision of the light source parameters is solved, detection items are added, and the detection capability of the light source parameters is improved.
In order to achieve the purpose, the invention adopts the following technical scheme:
the utility model provides a control circuit for detecting light source parameter, includes light source controller and light source, the light source controller is provided with host system, drive module and communication module, the light source is provided with light source control module and LED module, drive module respectively with host system with the LED module is connected, communication module respectively with host system with light source control module connects, light source control module is used for storing and exporting voltage parameter, current parameter, the duty cycle parameter of light source.
Further, 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.
Furthermore, the light source control module is provided with a voltage regulation unit and a second control unit, the voltage regulation unit is connected with the power supply end of the light source controller, the second control unit is connected with the communication module, and the second control unit is used for storing the voltage parameter, the current parameter and the duty ratio parameter of the light source.
Further, the first control unit and the second control unit are both STM32F103 chips, and the voltage regulation unit is an LM1117 chip.
Furthermore, the light source control module is provided with a signal processing unit, the signal processing unit is respectively connected with the communication module and the second control unit, and the signal processing unit is used for outputting a voltage parameter, a current parameter and a duty ratio parameter of the light source.
Further, the signal processing unit is an RS485 chip, and the RS485 chip is respectively connected with the communication module and the second control unit.
Furthermore, the driving module is provided with an operational amplifier unit and a power regulation and control unit, the operational amplifier unit is connected to the power regulation and control unit, and the operational amplifier unit and the power regulation and control unit form a negative feedback constant current circuit.
Furthermore, the operational amplifier unit is connected with the first control unit, the power regulation and control unit is connected with the LED module, the power regulation and control unit is used for increasing output power and driving current, the LED module comprises a resistor and a plurality of LED lamps, and the resistor is connected with the LED lamps in series.
Further, the operational amplifier unit is an LM258 operational amplifier chip, the power regulation and control unit is an N-channel MOS (metal oxide semiconductor) transistor, and the model of the N-channel MOS transistor is IRLZ 44N.
The second purpose of the invention is: a control method for detecting light source parameters is provided, which comprises the following steps:
s1: the master control module enables the driving module to close the output, and enables the input and the output of the communication module to be in a high-resistance state;
s2: enabling the output of the communication module to be in a normal output state, enabling the communication module to send a signal to a light source, enabling the input of the communication module to be in a normal input state, and waiting for the signal sent by the light source;
s3: and judging the type of the signal sent by the light source, and controlling the output of the driving module and the operation of the LED module by the main control module according to the received signal.
Further, in S3, if the main control module can normally receive the signal instruction, the main control module analyzes the signal instruction according to the received signal instruction, and controls the driving module according to the analyzed information, and the driving module controls the LED module to operate.
Further, in S3, if the main control module does not receive the return signal of the light source within a preset time, the driving module is controlled to turn off the output.
The invention has the advantages that; 1) the light source controller is provided with a main control module, a driving module and a communication module, wherein a light source is provided with a light source control module and an LED module, the light source control module is used for storing and outputting voltage parameters, current parameters and duty ratio parameters of the light source, and parameters such as excess voltage current and duty ratio of the light source are effectively detected; 2) the driving module is respectively connected with the main control module and the LED module, the communication module is respectively connected with the main control module and the light source control module, the light source control module sends parameters of a light source to the main control module through the communication module under the control of the main control module, the communication module and the light source control module are good in operation stability and high in response speed, and the detection precision of the light source parameters is remarkably improved; 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 instruction of the main control module, so that the control requirement on the light source parameters is met; 4) the control method for detecting the light source parameters improves the control capability of detecting the light source parameters.
Drawings
FIG. 1 is a block diagram of a control circuit according to the present invention.
Fig. 2 is a circuit schematic diagram of a main control module of the light source controller of the present invention.
Fig. 3 is a circuit schematic diagram of a driving module and a communication module of the light source controller of the present invention.
FIG. 4 is a circuit diagram of a light source according to the present invention.
FIG. 5 is a flow chart of the control method of the present invention.
Wherein: 1-a light source controller; 2-a light source; 11-a main control module; 12-a drive module; 13-a communication module; 21-a light source control module; 22-LED module.
Detailed Description
As used in this specification and the appended claims, certain terms are used to refer to particular components, and it will be appreciated by those skilled in the art that a manufacturer may refer to a component by different names. This specification and claims do not intend to distinguish between components that differ in name but not function. In the following description and in the claims, the terms "include" and "comprise" are used in an open-ended fashion, and thus should be interpreted to mean "include, but not limited to. "substantially" means within an acceptable error range, and a person skilled in the art can solve the technical problem within a certain error range to substantially achieve the technical effect.
In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", horizontal ", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention.
In the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
The present invention will be described in further detail with reference to the accompanying drawings 1 to 5 and specific examples, but the present invention is not limited thereto.
Example 1
The utility model provides a control circuit for detecting light source parameter, includes light source controller 1 and light source 2, light source controller 1 is provided with host system 11, drive module 12 and communication module 13, light source 2 is provided with light source control module 21 and LED module 22, drive module 12 is connected with host system 11 and LED module 22 respectively, communication module 13 is connected with host system 11 and light source control module 21 respectively, light source control module 21 is used for storing and outputting 2 voltage parameter, current parameter, duty cycle parameter of light source.
Preferably, the main control module 11 is provided with a first control unit, the light source control module 21 is provided with a voltage regulation unit and a second control unit, the voltage regulation unit is connected with the power supply end of the light source controller 1, the first control unit and the second control unit are both connected with the communication module 13, and the communication module 13 is an RS485 chip.
Preferably, the first control unit and the second control unit are both STM32F103 chips, the voltage regulation unit is an LM1117 chip, and the LM1117 chip can output a fixed voltage.
Preferably, the 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 connected with the communication module 13 and the second control unit respectively.
Preferably, 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.
Preferably, the operational amplifier unit is connected to the first control unit, and the power control unit is connected to the LED module 22.
Preferably, the operational amplifier unit is an LM258 operational amplifier chip, the power control unit is an N-channel MOS transistor, and the model of the N-channel MOS transistor is IRLZ 44N.
The operation process of the invention comprises the following steps:
description of signals:
LED +/LED-: the light source controller 1 provides the LED module 22 in the light source 2 with positive and negative poles of electric energy;
power +/Power-: the light source controller 1 provides the positive and negative poles of the electric energy for the light source main control module 21, and the voltage regulating unit is connected with the Power +/Power-supply end of the light source controller 1;
Data-p/Data-n: a pair of differential communication lines of the light source controller 1 and the light source 2;
RX/TX: a receiving/transmitting line of a data bus between a main control module 11 and a communication module 13 of the light source controller 1;
RE-1.. N/TE-1.. N: and an output state control line of the communication module 13 is powered on for default so that the input and output are in a high-impedance state.
1. The operation process of the light source controller comprises the following steps:
(1) the main control module 11 of the light source controller 1 enables the N drive modules 12 to close output; an STM32F103 chip of the main control module 11 controls RE-1.. N/TE-1.. N to be a high level and a 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 can enable the two DAC1 and DAC2 channels therein to output 0V, so that the output currents of all the driving modules 12 are 0.
(2) An STM32F103 chip of the main control module 11 controls RE-1/TE-1 to output a low level and a high level respectively to enable the output of a first communication module 13 to be effective, and sends a signal to a light source 2 connected with the first communication module 13 through a serial port 1 of the communication module 13; controlling RE-1/TE-1 to output low level to enable the input of a first communication module 13 to be effective, enabling a serial port 1 of the communication module 13 to wait for a signal sent by a light source 2, if the signal can normally receive an instruction, indicating that the light source 2 is connected to the first communication module 13, and at this time, a main control module 11 of a light source controller 1 analyzes the instruction according to the received instruction and controls parameters such as voltage, current and duty ratio output by a first driving module 12 according to information such as analyzed voltage, current and duty ratio, so as to realize accurate detection and control of light source parameters, wherein the main control module 11 enables a DAC1 channel of an STM32F103 chip to output corresponding voltage according to analyzed current information, and the first driving module 12 outputs corresponding current under the control of the main control module 11; if the return signal of the light source 2 is not received after waiting for a period of time, which indicates that no light source is inserted, the DAC1 channel of the STM32F103 chip of the main control module 11 outputs 0V, and the current of the first driving module 12 is 0, so that the first driving module 12 is controlled to turn off the output.
(3) The main control module 11 of the light source controller 1 controls RE-1.. N/TE-1.. N to be a high level and a low level respectively, so that the input and output of the N communication modules 13 are in a high-resistance state.
(4) The STM32F103 chip of the main control module 11 controls the RE-2/TE-2 to respectively output a low level and a high level to enable the second communication module 13 to effectively output, and sends signals to the light source 2 connected with the second communication module 13; controlling RE-2/TE-2 to output low level to enable the input of the RE-2/TE-2 to be effective with the second communication module 13, waiting for a signal sent by the light source 2, if the signal can normally receive an instruction, indicating that the light source 2 is connected to the second communication module 13, at this time, the main control module 11 of the light source controller 1 analyzes the instruction according to the received instruction, and controls parameters such as voltage, current and duty ratio output by the second driving module 12 according to the analyzed information such as voltage, current and duty ratio, thereby realizing accurate detection and control of light source parameters, wherein the main control module 11 enables a DAC2 channel of an STM32F103 chip to output corresponding voltage according to the analyzed current information, and the second driving module 12 outputs corresponding current under the control of the main control module 11; if the return signal of the light source 2 is not received after waiting for a period of time, which indicates that no light source is inserted, the DAC2 channel of the STM32F103 chip of the main control module 11 outputs 0V, the current of the second driving module 12 is 0, and the second driving module 12 is controlled to turn off the output.
(5) The main control module 11 of the light source controller 1 controls RE-1.. N/TE-1.. N to be a high level and a low level respectively, so that the input and output of the N communication modules 13 are in a high-resistance state.
(6) The detection of whether the light source is inserted or pulled out in the circuit is completed by a control method similar to (2) to (5).
(7) The main control module 11 of the light source controller 1 controls the RE-1.. N/TE-1.. N to make the input and output of the N communication modules be in a high-resistance state. And returning to the cycle (2).
2. The operation process of the light source end comprises the following steps:
(1) the control signal input of the light source control module 21 is effective, wherein the light source control module 21 is provided with an STM32F103 chip and an RS485 chip which are connected, and the RE/DE of the STM32F103 chip controlling the RS485 is all low level so that the signal input is effective.
(2) The serial port 1 of the STM32F103 chip of the light source control module 21 waits for a signal sent by the light source controller 1.
(3) After the serial port 1 of the STM32F103 chip of the light source control module 21 correctly receives the signal sent by the light source controller 1, the RE/DE of the RS485 is controlled to be low level and high level respectively to enable the signal output to be effective, and parameters such as voltage, current, duty ratio and the like of the light source 2 are sent to the light source controller 1 and returned to the (1) th step.
Example 2
A control method for detecting parameters of a light source comprises the following steps:
s1: the main control module 11 enables the driving module 12 to close the output, and enables the input and the output of the communication module 13 to be in a high-impedance state;
s2: the main control module 11 makes the output of the communication module 13 in a normal output state, and makes the communication module 13 send a signal to the light source 2, and the main control module 11 makes the input of the communication module 13 in a normal input state, and waits for the signal sent by the light source 2;
s3: and judging the type of the signal sent by the light source 2, the main control module 11 controls the output of the driving module 12 according to the received signal and controls the operation of the LED module 22, thereby effectively controlling the process of detecting the light source parameters.
Preferably, in S3, if the main control module 11 can normally receive the signal command, the main control module 11 analyzes the received signal command and controls the driving module 12 according to the analyzed information, the driving module 12 controls the LED module 22 to operate, and the light source control module 21 of the light source 2 can send the voltage, the current and the duty ratio parameter of the light source 2 to the main control module 11 after correctly receiving the signal sent by the communication module 13.
Preferably, in S3, if the main control module 11 does not receive the return signal of the light source 2 within the preset time, the control driving module 12 turns off the output and the LED module 22 does not operate.
Obviously, the existing circuit can not meet the requirement of marking rated voltage and current for light source parameters, and can not mark parameters such as instantaneous excess voltage and current, duty ratio and the like, but the light source control module 21 of the invention can store and output the voltage parameters, current parameters and duty ratio parameters of the light source 2, effectively detects the excess voltage and current, duty ratio and other parameters of the light source 2, and the main control module 11, the communication module 13 and the light source control module 21 have good operation stability and fast response speed, thereby obviously improving the detection precision of the light source parameters and improving the control capability of detecting the light source parameters.
Variations and modifications to the above-described embodiments may also occur to those skilled in the art, which fall within the scope of the invention as disclosed and taught herein. Therefore, the present invention is not limited to the above-mentioned embodiments, and any obvious improvement, replacement or modification made by those skilled in the art based on the present invention is within the protection scope of the present invention. Furthermore, although specific terms are employed herein, they are used in a generic and descriptive sense only and not for purposes of limitation.
Claims (10)
1. A control circuit for detecting parameters of a light source, comprising: including light source controller (1) and light source (2), light source controller (1) is provided with host system (11), drive module (12) and communication module (13), light source (2) are provided with light source control module (21) and LED module (22), drive module (12) respectively with host system (11) with LED module (22) are connected, communication module (13) respectively with host system (11) with light source control module (21) are connected, light source control module (21) are used for storing and exporting the voltage parameter, current parameter, duty cycle parameter of light source (2).
2. A control method for detecting parameters of a light source is characterized by comprising the following steps:
s1: the main control module (11) enables the drive module (12) to close output, and enables the input and the output of the communication module (13) to be in a high-resistance state;
s2: enabling the output of the communication module (13) to be in a normal output state, enabling the communication module (13) to send a signal to the light source (2), enabling the input of the communication module (13) to be in a normal input state, and waiting for the signal sent by the light source (2);
s3: and judging the type of the signal sent by the light source (2), and controlling the output of the driving module (12) and the operation of the LED module (22) by the main control module (11) according to the received signal.
3. The control circuit for sensing a parameter of a light source of claim 1, wherein: the main control module (11) is provided with a first control unit, and the first control unit is connected with the communication module (13).
4. The control circuit for sensing a parameter of a light source of claim 1, wherein: the light source control module (21) is provided with a voltage regulation unit and a second control unit.
5. The control circuit for sensing parameters of a light source of claim 4, wherein: the voltage regulating unit is connected with a power supply end of the light source controller (1), and the second control unit is connected with the communication module (13).
6. The control circuit for sensing a parameter of a light source of claim 5, wherein: the light source control module (21) is provided with a signal processing unit, and the signal processing unit is respectively connected with the communication module (13) and the second control unit.
7. A control circuit for sensing a parameter of a light source as recited in claim 3, wherein: the driving module (12) is provided with an operational amplifier unit and a power regulation and control unit, and the operational amplifier unit is connected with the power regulation and control unit.
8. The control circuit for sensing a parameter of a light source of claim 7, wherein: the operational amplifier unit is connected with the first control unit, and the power regulation and control unit is connected with the LED module (22).
9. The control method for detecting parameters of a light source according to claim 2, wherein: in S3, if the main control module (11) can normally receive the signal command, the main control module (11) analyzes according to the received signal command, and controls the driving module (12) according to the analyzed information, and the driving module (12) controls the LED module (22) to operate.
10. The control method for detecting parameters of a light source according to claim 2, wherein: in S3, if the main control module (11) does not receive the return signal of the light source (2) within a preset time, controlling the driving module (12) to turn off the output.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010631413.5A CN111800906A (en) | 2020-07-03 | 2020-07-03 | Control circuit and control method for detecting light source parameters |
| PCT/CN2021/081734 WO2022001206A1 (en) | 2020-07-03 | 2021-03-19 | Control circuit and control method for measuring light source parameters |
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| CN202010631413.5A CN111800906A (en) | 2020-07-03 | 2020-07-03 | Control circuit and control method for detecting light source parameters |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022001206A1 (en) * | 2020-07-03 | 2022-01-06 | 广东奥普特科技股份有限公司 | Control circuit and control method for measuring light source parameters |
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