CN107529249B - Intelligent high-power LED fish attracting lamp control system and control method thereof - Google Patents

Intelligent high-power LED fish attracting lamp control system and control method thereof Download PDF

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CN107529249B
CN107529249B CN201710546058.XA CN201710546058A CN107529249B CN 107529249 B CN107529249 B CN 107529249B CN 201710546058 A CN201710546058 A CN 201710546058A CN 107529249 B CN107529249 B CN 107529249B
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led fish
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CN107529249A (en
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曹艳
王婷
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Shandong Pii Electronic Technology Co ltd
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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]
    • 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
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B20/00—Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps
    • Y02B20/30—Semiconductor lamps, e.g. solid state lamps [SSL] light emitting diodes [LED] or organic LED [OLED]

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Abstract

An intelligent high-power LED (light-emitting diode) fish luring lamp control system and a control method thereof comprise an EMI (electro-magnetic interference) filtering module, a PFC (power factor correction) module, a BUCK constant-current control module, a remote communication module, a main controller, an acquisition module, a current-voltage temperature detection module and a plurality of LED fish luring lamps, wherein the EMI filtering module, the PFC power factor correction module and the BUCK constant-current control module are sequentially connected, the remote communication module, the main controller and the acquisition module are sequentially connected, and the current-voltage temperature detection module is connected with the acquisition module; the BUCK constant-current control module is respectively connected with the LED fish luring lamps, the acquisition module is respectively connected with the LED fish luring lamps, the main controller performs centralized switch dimming control on all the LED fish luring lamps through the MODBUS, and the running state of each LED fish luring lamp can be monitored in real time.

Description

Intelligent high-power LED fish attracting lamp control system and control method thereof
Technical Field
The invention relates to an intelligent high-power LED fish attracting lamp control system and a control method thereof, belonging to the technical field of fishery lamplight fishing.
Background
In the fishing industry, a fish luring lamp is an indispensable product in a light fish luring operation mode, and mainly utilizes the phototactic characteristic of fish to catch fish by light emitting and fish collecting. At present, the light source of the fish luring lamp on the ship mainly adopts a metal halide lamp.
The traditional metal halide lamp has low luminous efficiency (about 80-90 lm/W), and the special stabilizer for the metal halide lamp has the defects of high cost per watt, incapability of being started immediately, incapability of realizing centralized control and the like.
The different fish have different phototaxis, so it is best to change the brightness and light color of the fish collecting and catching lamp according to the need when the different fish are caught. The existing LED fish luring lamps are white light single color temperature LED lamps and do not have the functions of dimming brightness and light color; the metal halide lamp can not realize the functions; therefore, the brightness and light color of the light cannot be changed according to the phototaxis of different fishes to different light colors and brightness, and the fishing effect is influenced.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides an intelligent high-power LED fish luring lamp control system;
the invention also provides a control method of the control system;
the LED fish attracting lamp has the advantages of high efficiency, high power factor and small harmonic wave, all the LED fish attracting lamps are subjected to centralized switch dimming control through the main controller, the constant current adjusting precision is high, the voltage range is wide, and various series-parallel connection of the LED fish attracting lamps can be easily realized.
Interpretation of terms
PWM, meaning pulse width modulation;
duty ratio, which is the ratio of the energizing time and the energizing period of the pulse signal;
the technical scheme of the invention is as follows:
an intelligent high-power LED (light-emitting diode) fish luring lamp control system comprises an EMI (electro-magnetic interference) filtering module, a PFC (power factor correction) module, a BUCK constant current control module, a remote communication module, a main controller, an acquisition module, a current-voltage temperature detection module and a plurality of LED fish luring lamps, wherein the EMI filtering module, the PFC power factor correction module and the BUCK constant current control module are sequentially connected, the remote communication module, the main controller and the acquisition module are sequentially connected, and the current-voltage temperature detection module is connected with the acquisition module; the BUCK constant-current control module is respectively connected with a plurality of LED fish luring lamps, and the acquisition module is respectively connected with a plurality of LED fish luring lamps;
the EMI filtering module is used for filtering EM noise; the anti-interference capability of the electronic equipment and the reliability of the system are improved, and the system can be widely applied to the fields of electronic measuring instruments, computer room equipment, switching power supplies, measurement and control systems and the like. The PFC power factor correction module is used for measuring the degree of effective utilization of electric power; when the power factor value is larger, the power utilization rate is higher. The acquisition module is used for acquiring output current signals and temperature signals of the multi-path LED fish luring lamp and transmitting the acquired signals to the main controller; the BUCK constant current control module is used for controlling the PWM duty ratio through the multi-path LED fish luring lamp output current signals collected by the collection module so as to realize the output of constant current to a load; the current voltage temperature detection module is used for detecting a current signal, a voltage signal and a temperature signal in the circuit and sending the current signal, the voltage signal and the temperature signal to the acquisition module; the remote communication module is used for realizing connection with an upper computer and realizing accurate control of each LED fish luring lamp through the upper computer; the main controller is used for realizing automatic operation of programs, providing various interfaces connected with other modules, performing power failure protection on the control system and quickly responding to overvoltage and overcurrent abnormal conditions. The safe operation of the circuit is ensured.
The EMI filtering module is an EMI filter.
According to the invention, the BUCK constant current control module is preferably improved in a conventional BUCK circuit, and a non-inductive capacitor C1 and driving resistors R1 and R2 are added; the circuit connection relationship of the BUCK constant current control module is as follows: including first MOSFET switch tube, second MOSFET switch tube, first diode D1, second diode D2, first MOSFET switch tube second MOSFET switch tube parallel connection connects, and the withstand voltage value is 600V, and the capacitance capacity is the noninductive electric capacity C1 of 0.47uF in the parallelly connected of direct current input generating line department, drive resistance R1 is connected to the gate pole of first MOSFET switch tube, drive resistance R2 is connected to the gate pole of second MOSFET switch tube.
The conventional BUCK circuit forms a BUCK topological structure through a voltage reduction inductor, an output capacitor and the like, the main controller generates a PWM signal with variable pulse width by comparing output current with set current, and the PWM signal directly drives a first MOSFET switching tube after being driven and amplified. The switching loss and the size of the components are considered, and the fundamental frequency is selected to be 20 KHz. A non-inductive capacitor C1 with the withstand voltage value of 600V and the capacitance capacity of 0.47uF is connected in parallel at a direct current input bus, and a non-inductive capacitor C1 provides a path for surge voltage caused by parasitic inductance, so that voltage surge between two ends of the first MOSFET switching tube and the second MOSFET switching tube is reduced to 430V from 950V before. The gate pole of the first MOSFET switch tube is connected with the driving resistor R1, and the gate pole of the second MOSFET switch tube is connected with the driving resistor R2, so that the oscillation between the gate pole of the first MOSFET switch tube and the gate pole of the second MOSFET switch tube is avoided, and the reliability is improved.
According to the present invention, the first MOSFET switch tube and the second MOSFET switch tube are both in the model of SPW74N60C3, and the first diode D1 and the second diode D2 are SiC diodes in the model of C3D20060 SiC.
Electricity used by first MOSFET switching tube and second MOSFET switching tube with model number of SPW74N60C3The wire sensing diameter is 4mm2The value is 1.2mH, the magnetic cores are double rings of Fe-Si-Al A773392 and are wound in parallel, the first diode D1 and the second diode D2 adopt SiC diodes of Cree company, the diodes have no reverse recovery time, the switching loss of the first MOSFET switching tube and the second MOSFET switching tube can be greatly reduced, and the high-power BUCK constant current control module is very suitable for high-power BUCK constant current control modules.
According to the invention, the main controller is preferably an ARM series single chip microcomputer.
The internal clock frequency of the main controller is up to 168MHz, the sampling speed of up to 100KHz can be realized, the system response time is only 10us, a 12-bit A/D converter is integrated in the main controller, the sampling precision can be up to 0.02%, the PWM duty ratio is controlled by the multipath LED fish luring lamp output current collected by the collection module, the constant current regulation is realized, the direct current bus voltage and the output voltage are collected, the power failure protection is carried out, and the quick response is made to abnormal conditions such as overvoltage, overcurrent and the like; the safe operation of the circuit is ensured. Considering the condition that the volt-ampere characteristic of the LED fish luring lamp is steep, the high resolution of the constant current circuit is very necessary, and the main controller can enable the resolution to reach 0.01% under the condition that the BUCK frequency is 20KHz, so that the accuracy required by system adjustment is fully met.
According to the optimal selection of the LED fish luring lamp, the main controller is communicated with the upper computer through the SP3485 serial port driving chip, and receives an MODBUS format instruction sent by the upper computer, so that the brightness of the LED fish luring lamp and the on-off of the LED fish luring lamp are intelligently adjusted.
In order to reduce the impact on the marine generator, a soft start technology is adopted in the initial electrifying process, and the soft start time can be set in a program.
According to the invention, the model of the main control chip in the PFC power factor correction module is ICE3PCS 01.
The PFC power factor correction module forms a Boost topological structure through a Boost inductor, an output capacitor and the like, error current obtained after input current is compared with reference current is amplified and then compared with a PWM signal to obtain a switching tube driving signal, and the average value of the input current and input rectification voltage are enabled to be in the same phase rapidly and accurately and are close to a sine wave. The PFC power factor correction module repairs BUG of the previous generation of chips, can protect abnormal conditions such as output overvoltage, input low voltage and the like, can still normally work under the condition that voltage fluctuates severely, and can not generate the conditions that faults can be caused by inductor saturation, chip trigger overcurrent protection and the like. The boost inductor adopts a 1.2mH double 77439A7 iron-silicon-aluminum magnetic ring and is wound around a 1.7 wire diameter, the inductance allowance is large, the anti-saturation capacity is strong, and the through-current capacity is large. The harmonic component of the input current can be greatly reduced, stable DC380V output is obtained in a wide voltage input range of AC85V-265V, and the power factor is as high as 0.99.
The EMI filtering module filters harmonic waves and improves power supply quality through a filtering inductor L3, X-type common mode capacitors C7 and C9 and Y-type differential mode capacitors C8 and C10-C12, so that a marine generator is protected. Meanwhile, impact caused by a large electrolytic capacitor during power-on is avoided through the NTC thermistor R1, and after the voltage of the direct-current bus exceeds 280V, the controller controls the relay K1 to suck, so that the NTC thermistor R1 is in short circuit.
The voltage detection converts high voltage into current signals through the resistor R17, and the voltage is detected through the 250 omega sampling resistor R1 on the low-voltage side by utilizing the characteristic of current linear transmission of the optocoupler U10, so that the isolation of high voltage and low voltage is realized, and the stability and the safety of the system are improved. The current detection converts the current of-20A to +20A into the voltage of 0.5 to 4.5V for sampling through an ACS712 chip, the sampling precision can reach 0.1 percent, the sampling speed can reach 100KHz, and the response speed and the control precision of the system are improved.
Telecommunications modules enable one host to carry up to 128 slave stations. The host computer connection adopts MODBUS RTU agreement, realizes the accurate control to every lamp through the mode of polling.
According to the preferable preference of the invention, the LED fish luring lamp control system further comprises a lightning protection and leakage protection module, and the LED fish luring lamp control system is grounded through the BUCK constant-current control module. The lightning protection and leakage protection module improves the tolerance to the lightning voltage impact and avoids potential personal threats caused by leakage.
The working method of the LED fish luring lamp control system specifically comprises the following steps:
(1) inputting wide voltage AC85V-265V, and filtering out harmonic waves through the EMI filtering module;
(2) processing the wide voltage AC85V-265V in the step (1) through the PFC power factor correction module to obtain a stable voltage V1Outputting;
(3) the acquisition module acquires current signals output by the multiple paths of LED fish luring lamps and sends the acquired current signals to the main controller;
(4) according to different fishes, the upper computer sends the set current of the LED fish luring lamp corresponding to the fishes to the main controller through the remote communication module; the main controller compares the acquired current with a set current to generate a PWM signal with variable pulse width;
(5) the pulse width variable PWM signal drives the BUCK constant current control module, and constant current control is completed in the BUCK constant current control module: and carrying out filtering processing on the acquired multipath LED fish luring lamp output current signals, judging the filtered multipath LED fish luring lamp output current data, taking the maximum value as the actual value of a PID (proportion integration differentiation) ring of the BUCK constant current control module, carrying out PID (proportion integration differentiation) calculation on the actual value and the given current corresponding to the fish, updating the obtained data into a PWM (pulse-width modulation) comparison value, and realizing constant current control.
The step (2) specifically comprises the following steps: amplifying the error current after comparing the input current with the reference current, and comparing the amplified error current with a PWM signal to obtain a driving signal of a switching tube, so that the average value of the input current is in the same phase with the input rectified voltage and is close to a sine wave, and stable DC380V output is obtained;
and comparing the input voltage value obtained after sampling with a given value DC200V, and enabling the anti-surge relay to be attracted if the input voltage is higher than the given value, and short-circuiting the negative temperature coefficient thermistor to prepare for realizing high-power output. When the input voltage is lower than DC80V, the relay is released to ensure the suppression of the anti-surge relay when the power is on next time. 3 seconds after the anti-surge relay is closed, the PFC power factor correction module controls the power supply to output high level, and the function of the PFC power factor correction module is enabled. And starting the constant current output function of the BUCK constant current control module 3 seconds after the function of the PFC power factor correction module is enabled and the input voltage is greater than DC 320V. The constant current source adopts a soft start technology to prevent the impact on the power supply voltage, and the time for raising the current to a rated value is limited to be more than 100 ms.
The method for judging the fault of the LED fish luring lamp control system comprises the following specific steps:
in the process of constant current output, converting the collected output current of the LED fish luring lamp into output voltage, if the output voltage is greater than DC200V and the maximum value of the output current is less than 1A, opening the LED fish luring lamp, stopping the PID function at the moment, and keeping the existing PWM duty ratio; to prevent high voltage from occurring due to the open circuit of the constant current source. If the output voltage is less than DC200V and the output current reaches the set current, the LED fish luring lamp is short-circuited and outputs an alarm signal; if the output voltage suddenly rises, the load shedding condition is judged to occur in the running state, and the main controller closes the PWM signal output. To prevent damage to the device from excessive voltages.
And acquiring the actual temperature of the radiating fin corresponding to the output voltage of the temperature sensor by using a table look-up method, keeping the original power not to be increased when the actual temperature of the radiating fin is more than 75 ℃, and jumping to stop for standby when the actual temperature of the radiating fin is more than 90 ℃.
The invention has the beneficial effects that:
1. the invention adopts a BOOST + BUCK framework, the peak power of the whole machine can reach 2400 Watts, and the efficiency is as high as 95%.
2. By adopting the advanced continuous current type PFC technology, the power factor reaches up to 0.99, and the harmonic content is small.
3. The main controller performs centralized switch dimming control on all the LED fish luring lamps through the MODBUS bus, and can monitor the running state of each LED fish luring lamp in real time; the main controller of the invention adopts a high-performance ARM singlechip, the constant current regulation precision is high and the voltage range is wide due to 168MHz main frequency, and the series-parallel connection of the LED fish luring lamp can be easily realized.
4. According to the invention, important technical parameters such as historical switching times, running time, running voltage and current of the LED fish luring lamp can be recorded through the upper computer database.
Drawings
FIG. 1 is a block diagram of the present invention;
FIG. 2 is a schematic circuit diagram of a BUCK constant current control module;
FIG. 3 is a schematic circuit diagram of an EMI filtering module;
FIG. 4 is a schematic circuit diagram of a current-voltage temperature sensing module;
FIG. 5 is a schematic view of a plurality of LED fish luring lamps.
Detailed Description
The invention is further defined in the following, but not limited to, the figures and examples in the description.
Example 1
An intelligent high-power LED (light-emitting diode) fish luring lamp control system comprises an EMI (electro-magnetic interference) filtering module, a PFC (power factor correction) module, a BUCK constant current control module, a remote communication module, a main controller, an acquisition module, a current-voltage temperature detection module and a plurality of LED fish luring lamps, wherein the EMI filtering module, the PFC power factor correction module and the BUCK constant current control module are sequentially connected, the remote communication module, the main controller and the acquisition module are sequentially connected, and the current-voltage temperature detection module is connected with the acquisition module; the BUCK constant-current control module is respectively connected with a plurality of LED fish luring lamps, and the acquisition module is respectively connected with a plurality of LED fish luring lamps; as shown in fig. 1. A schematic diagram of a plurality of LED fish luring lamps is shown in figure 5.
The EMI filtering module is used for filtering EM noise; the anti-interference capability of the electronic equipment and the reliability of the system are improved, and the system can be widely applied to the fields of electronic measuring instruments, computer room equipment, switching power supplies, measurement and control systems and the like. The PFC power factor correction module is used for measuring the degree of effective utilization of electric power; when the power factor value is larger, the power utilization rate is higher. The acquisition module is used for acquiring output current signals and temperature signals of the multi-path LED fish luring lamp and transmitting the acquired signals to the main controller; the BUCK constant current control module is used for controlling the PWM duty ratio through the multi-path LED fish luring lamp output current signals collected by the collection module so as to realize the output of constant current to a load; the current voltage temperature detection module is used for detecting a current signal, a voltage signal and a temperature signal in the circuit and sending the current signal, the voltage signal and the temperature signal to the acquisition module; the remote communication module is used for realizing connection with an upper computer and realizing accurate control of each LED fish luring lamp through the upper computer; the main controller is used for realizing automatic operation of programs, providing various interfaces connected with other modules, performing power failure protection on the control system and quickly responding to overvoltage and overcurrent abnormal conditions. The safe operation of the circuit is ensured.
The EMI filtering module is an EMI filter. The schematic circuit diagram of the EMI filter module is shown in fig. 3.
The BUCK constant current control module is improved in a conventional BUCK circuit, and a non-inductive capacitor C1 and driving resistors R1 and R2 are added; the circuit connection relationship of the BUCK constant current control module is as follows: including first MOSFET switch tube, second MOSFET switch tube, first diode D1, second diode D2, first MOSFET switch tube second MOSFET switch tube parallel connection connects, and the withstand voltage value is 600V, and the capacitance capacity is the noninductive electric capacity C1 of 0.47uF in the parallelly connected of direct current input generating line department, drive resistance R1 is connected to the gate pole of first MOSFET switch tube, drive resistance R2 is connected to the gate pole of second MOSFET switch tube. As shown in fig. 2.
The conventional BUCK circuit forms a BUCK topological structure through a voltage reduction inductor, an output capacitor and the like, the main controller generates a PWM signal with variable pulse width by comparing output current with set current, and the PWM signal directly drives a first MOSFET switching tube after being driven and amplified. The switching loss and the size of the components are considered, and the fundamental frequency is selected to be 20 KHz. A non-inductive capacitor C1 with the withstand voltage value of 600V and the capacitance capacity of 0.47uF is connected in parallel at a direct current input bus, and a non-inductive capacitor C1 provides a path for surge voltage caused by parasitic inductance, so that voltage surge between two ends of the first MOSFET switching tube and the second MOSFET switching tube is reduced to 430V from 950V before. The gate pole of the first MOSFET switch tube is connected with the driving resistor R1, and the gate pole of the second MOSFET switch tube is connected with the driving resistor R2, so that the oscillation between the gate pole of the first MOSFET switch tube and the gate pole of the second MOSFET switch tube is avoided, and the reliability is improved.
The models of the first MOSFET switch tube and the second MOSFET switch tube are both SPW74N60C3, and the first diode D1 and the second diode D2 are SiC diodes with the models of C3D20060 SiC.
The diameters of the inductance wires used by the first MOSFET switch tube and the second MOSFET switch tube of the model SPW74N60C3 are 4mm2The value is 1.2mH, the magnetic cores are double rings of Fe-Si-Al A773392 and are wound in parallel, the first diode D1 and the second diode D2 adopt SiC diodes of Cree company, the diodes have no reverse recovery time, the switching loss of the first MOSFET switching tube and the second MOSFET switching tube can be greatly reduced, and the high-power BUCK constant current control module is very suitable for high-power BUCK constant current control modules.
The main controller is an ARM series single chip microcomputer.
The internal clock frequency of the main controller is up to 168MHz, the sampling speed of up to 100KHz can be realized, the system response time is only 10us, a 12-bit A/D converter is integrated in the main controller, the sampling precision can be up to 0.02%, the PWM duty ratio is controlled by the multipath LED fish luring lamp output current collected by the collection module, the constant current regulation is realized, the direct current bus voltage and the output voltage are collected, the power failure protection is carried out, and the quick response is made to abnormal conditions such as overvoltage, overcurrent and the like; the safe operation of the circuit is ensured. Considering the condition that the volt-ampere characteristic of the LED fish luring lamp is steep, the high resolution of the constant current circuit is very necessary, and the main controller can enable the resolution to reach 0.01% under the condition that the BUCK frequency is 20KHz, so that the accuracy required by system adjustment is fully met.
The main controller is communicated with the upper computer through an SP3485 serial port driving chip, receives an MODBUS format instruction sent by the upper computer, and achieves intelligent adjustment of the brightness of the LED fish luring lamp and the LED fish luring lamp switch.
In order to reduce the impact on the marine generator, a soft start technology is adopted in the initial electrifying process, and the soft start time can be set in a program.
The model of a main control chip in the PFC power factor correction module is ICE3PCS 01.
The PFC power factor correction module forms a Boost topological structure through a Boost inductor, an output capacitor and the like, error current obtained after input current is compared with reference current is amplified and then compared with a PWM signal to obtain a switching tube driving signal, and the average value of the input current and input rectification voltage are enabled to be in the same phase rapidly and accurately and are close to a sine wave. The PFC power factor correction module repairs BUG of the previous generation of chips, can protect abnormal conditions such as output overvoltage, input low voltage and the like, can still normally work under the condition that voltage fluctuates severely, and can not generate the conditions that faults can be caused by inductor saturation, chip trigger overcurrent protection and the like. The boost inductor adopts a 1.2mH double 77439A7 iron-silicon-aluminum magnetic ring and is wound around a 1.7 wire diameter, the inductance allowance is large, the anti-saturation capacity is strong, and the through-current capacity is large. The harmonic component of the input current can be greatly reduced, stable DC380V output is obtained in a wide voltage input range of AC85V-265V, and the power factor is as high as 0.99.
The EMI filtering module filters harmonic waves and improves power supply quality through a filtering inductor L3, X-type common mode capacitors C7 and C9 and Y-type differential mode capacitors C8 and C10-C12, so that a marine generator is protected. Meanwhile, impact caused by a large electrolytic capacitor during power-on is avoided through the NTC thermistor R1, and after the voltage of the direct-current bus exceeds 280V, the controller controls the relay K1 to suck, so that the NTC thermistor R1 is in short circuit.
The voltage detection is realized through the current-voltage temperature detection module, high voltage is converted into a current signal through the resistor R17, the voltage is detected through the 250 omega sampling resistor R1 on the low-voltage side by utilizing the characteristic of current linear transmission of the optocoupler U10, the isolation of the high voltage and the low voltage is realized, and the stability and the safety of the system are improved. The current detection converts the current of-20A to +20A into the voltage of 0.5 to 4.5V for sampling through an ACS712 chip, the sampling precision can reach 0.1 percent, the sampling speed can reach 100KHz, and the response speed and the control precision of the system are improved. As shown in fig. 4.
Telecommunications modules enable one host to carry up to 128 slave stations. The host computer connection adopts MODBUS RTU agreement, realizes the accurate control to every lamp through the mode of polling.
The LED fish luring lamp control system further comprises a lightning protection and leakage protection module, and the LED fish luring lamp control system is grounded through the BUCK constant-current control module. The lightning protection and leakage protection module improves the tolerance to the lightning voltage impact and avoids potential personal threats caused by leakage.
Example 2
The working method of the LED fish-luring lamp control system in embodiment 1 includes the specific steps of:
(1) inputting wide voltage AC85V-265V, and filtering out harmonic waves through the EMI filtering module;
(2) processing the wide voltage AC85V-265V in the step (1) through the PFC power factor correction module to obtain a stable voltage V1Outputting;
(3) the acquisition module acquires current signals output by the multiple paths of LED fish luring lamps and sends the acquired current signals to the main controller;
(4) according to different fishes, the upper computer sends the set current of the LED fish luring lamp corresponding to the fishes to the main controller through the remote communication module; the main controller compares the acquired current with a set current to generate a PWM signal with variable pulse width;
(5) the pulse width variable PWM signal drives the BUCK constant current control module, and constant current control is completed in the BUCK constant current control module: and carrying out filtering processing on the acquired multipath LED fish luring lamp output current signals, judging the filtered multipath LED fish luring lamp output current data, taking the maximum value as the actual value of a PID (proportion integration differentiation) ring of the BUCK constant current control module, carrying out PID (proportion integration differentiation) calculation on the actual value and the given current corresponding to the fish, updating the obtained data into a PWM (pulse-width modulation) comparison value, and realizing constant current control.
The step (2) specifically comprises the following steps: amplifying the error current after comparing the input current with the reference current, and comparing the amplified error current with a PWM signal to obtain a driving signal of a switching tube, so that the average value of the input current is in the same phase with the input rectified voltage and is close to a sine wave, and stable DC380V output is obtained;
the method for judging the fault of the LED fish luring lamp control system comprises the following specific steps:
in the process of constant current output, converting the collected output current of the LED fish luring lamp into output voltage, if the output voltage is greater than DC200V and the maximum value of the output current is less than 1A, opening the LED fish luring lamp, stopping the PID function at the moment, and keeping the existing PWM duty ratio; to prevent high voltage from occurring due to the open circuit of the constant current source. If the output voltage is less than DC200V and the output current reaches the set current, the LED fish luring lamp is short-circuited and outputs an alarm signal; if the output voltage suddenly rises, the load shedding condition is judged to occur in the running state, and the main controller closes the PWM signal output. To prevent damage to the device from excessive voltages.
And acquiring the actual temperature of the radiating fin corresponding to the output voltage of the temperature sensor by using a table look-up method, keeping the original power not to be increased when the actual temperature of the radiating fin is more than 75 ℃, and jumping to stop for standby when the actual temperature of the radiating fin is more than 90 ℃.
And comparing the input voltage value obtained after sampling with a given value DC200V, and enabling the anti-surge relay to be attracted if the input voltage is higher than the given value, and short-circuiting the negative temperature coefficient thermistor to prepare for realizing high-power output. When the input voltage is lower than DC80V, the relay is released to ensure the surge suppression at the next power-on. And 3 seconds after the anti-surge relay is closed, the PFC controls the power supply to output high level, so that the PFC function is enabled. The PFC function starts the BUCK constant current output function 3 seconds after being enabled and the input voltage is larger than DC 320V. The constant current source adopts a soft start technology to prevent the impact on the power supply voltage, and the time for raising the current to a rated value is limited to be more than 100 ms.
The control method of the main program comprises the following steps: after the system is electrified, the system enters a cycle program after initializing internal function modules such as a timer, an ADC (analog to digital converter), a PWM (pulse-width modulation) generator, an I/O (input/output) port and a watchdog, processes a communication command in the cycle program of a main program, receives a modbus 030610 instruction sent by an upper computer, performs corresponding processing after CRC (cyclic redundancy check) and responds in a modbus format. And simultaneously detecting whether flash data read-write instructions exist in the main program, and if so, processing data of corresponding addresses to permanently store the data, thereby realizing the power-down storage function.

Claims (8)

1. A working method of an intelligent high-power LED (light-emitting diode) fish attracting lamp control system comprises an EMI (electro-magnetic interference) filtering module, a PFC (power factor correction) module, a BUCK constant current control module, a remote communication module, a main controller, an acquisition module, a current-voltage temperature detection module and a multi-path LED fish attracting lamp, wherein the EMI filtering module, the PFC power factor correction module and the BUCK constant current control module are sequentially connected, the remote communication module, the main controller and the acquisition module are sequentially connected, and the current-voltage temperature detection module is connected with the acquisition module; the BUCK constant-current control module is respectively connected with a plurality of paths of LED fish luring lamps, and the acquisition module is respectively connected with a plurality of paths of LED fish luring lamps;
the EMI filtering module is used for filtering EM noise; the PFC power factor correction module is used for measuring the degree of effective utilization of electric power; the acquisition module is used for acquiring output current signals and temperature signals of the multi-path LED fish luring lamp and transmitting the acquired signals to the main controller; the BUCK constant current control module is used for controlling the PWM duty ratio through the multi-path LED fish luring lamp output current signals collected by the collection module so as to realize the output of constant current to a load; the current voltage temperature detection module is used for detecting a current signal, a voltage signal and a temperature signal in the circuit and sending the current signal, the voltage signal and the temperature signal to the acquisition module; the remote communication module is used for realizing connection with an upper computer and realizing accurate control of the multi-path LED fish luring lamp through the upper computer; the main controller is used for realizing automatic operation of programs, providing various interfaces connected with other modules, performing power failure protection on the control system and quickly responding to the abnormal conditions of overvoltage and overcurrent;
the circuit connection relationship of the BUCK constant current control module is as follows: the circuit comprises a first MOSFET switch tube, a second MOSFET switch tube, a first diode D1 and a second diode D2, wherein the first MOSFET switch tube and the second MOSFET switch tube are connected in parallel, a non-inductive capacitor C1 with the withstand voltage value of 600V and the capacitance of 0.47uF is connected in parallel at a direct current input bus, the gate of the first MOSFET switch tube is connected with a driving resistor R1, and the gate of the second MOSFET switch tube is connected with the driving resistor R2; the working method is characterized by comprising the following specific steps:
(1) inputting wide voltage AC85V-265V, and filtering out harmonic waves through the EMI filtering module;
(2) processing the wide voltage AC85V-265V in the step (1) through the PFC power factor correction module to obtain a stable voltage V1 output;
(3) the acquisition module acquires current signals output by the multiple paths of LED fish luring lamps and sends the acquired current signals to the main controller;
(4) according to different fishes, the upper computer sends the set current of the LED fish luring lamp corresponding to the fishes to the main controller through the remote communication module; the main controller compares the acquired current with a set current to generate a PWM signal with variable pulse width;
(5) the pulse width variable PWM signal drives the BUCK constant current control module, and constant current control is completed in the BUCK constant current control module: and carrying out filtering processing on the acquired multipath LED fish luring lamp output current signals, judging the filtered multipath LED fish luring lamp output current data, taking the maximum value as the actual value of a PID (proportion integration differentiation) ring of the BUCK constant current control module, carrying out PID (proportion integration differentiation) calculation on the actual value and the set current corresponding to the fish, updating the obtained data into a PWM (pulse-width modulation) comparison value, and realizing constant current control.
2. The operating method of an intelligent high-power LED fish-luring lamp control system according to claim 1, wherein the first MOSFET switch tube and the second MOSFET switch tube are both in the model of SPW74N60C3, and the first diode D1 and the second diode D2 are SiC diodes in the model of C3D20060 SiC.
3. The working method of the intelligent high-power LED fish attracting lamp control system according to claim 1, wherein the main controller is an ARM series single chip microcomputer.
4. The working method of the intelligent high-power LED fish-luring lamp control system according to claim 3, wherein the main controller communicates with the upper computer through an SP3485 serial port driving chip, and receives MODBUS format instructions sent by the upper computer to realize intelligent regulation of LED fish-luring lamp brightness and LED fish-luring lamp switching.
5. The operating method of an intelligent high-power LED fish luring lamp control system according to claim 1, wherein the model of the main control chip in the PFC power factor correction module is ICE3PCS 01.
6. The working method of the intelligent high-power LED fish attracting lamp control system according to claim 1, wherein the LED fish attracting lamp control system further comprises a lightning protection and leakage protection module, and the LED fish attracting lamp control system is grounded through the BUCK constant-current control module.
7. The working method of the intelligent high-power LED fish attracting lamp control system according to claim 1, wherein the step (2) comprises the following specific steps: and amplifying the error current obtained by comparing the input current with the reference current, and comparing the amplified error current with a PWM signal to obtain a driving signal of the switching tube, so that the average value of the input current is in the same phase with the input rectified voltage and is close to a sine wave, and stable DC380V output is obtained.
8. The working method of the intelligent high-power LED fish attracting lamp control system of any one of claims 1-7, wherein the specific steps of fault judgment comprise: in the process of constant current output, converting the collected output current of the LED fish luring lamp into output voltage, if the output voltage is greater than DC200V and the maximum value of the output current is less than 1A, opening the LED fish luring lamp, stopping the PID function at the moment, and keeping the existing PWM duty ratio; if the output voltage is less than DC200V and the output current reaches the set current, the LED fish luring lamp is short-circuited and outputs an alarm signal; if the output voltage suddenly rises, the load shedding situation is judged to occur in the running state, and the main controller closes the PWM signal output.
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