WO2022041044A1 - Noise reduction system for internet of things monitoring system, and noise reduction method - Google Patents

Noise reduction system for internet of things monitoring system, and noise reduction method Download PDF

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Publication number
WO2022041044A1
WO2022041044A1 PCT/CN2020/111740 CN2020111740W WO2022041044A1 WO 2022041044 A1 WO2022041044 A1 WO 2022041044A1 CN 2020111740 W CN2020111740 W CN 2020111740W WO 2022041044 A1 WO2022041044 A1 WO 2022041044A1
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WO
WIPO (PCT)
Prior art keywords
mos transistor
resistor
voltage
output
transistor
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Application number
PCT/CN2020/111740
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French (fr)
Chinese (zh)
Inventor
陈勇
李隽诗
李凯
田敏
申彦
段向军
孙刚
范迪
任可欣
Original Assignee
南京龙渊众创信息科技股份有限公司
江苏意渊工业大数据平台有限公司
南京泰慧联电子科技有限公司
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Publication of WO2022041044A1 publication Critical patent/WO2022041044A1/en

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Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M1/00—Details of apparatus for conversion
    • H02M1/44—Circuits or arrangements for compensating for electromagnetic interference in converters or inverters
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M3/00—Conversion of dc power input into dc power output
    • H02M3/22—Conversion of dc power input into dc power output with intermediate conversion into ac
    • H02M3/24—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters
    • H02M3/28—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac
    • H02M3/325—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal
    • H02M3/335—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only
    • H02M3/33507—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of the output voltage or current, e.g. flyback converters
    • H02M3/33523—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of the output voltage or current, e.g. flyback converters with galvanic isolation between input and output of both the power stage and the feedback loop
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M3/00—Conversion of dc power input into dc power output
    • H02M3/22—Conversion of dc power input into dc power output with intermediate conversion into ac
    • H02M3/24—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters
    • H02M3/28—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac
    • H02M3/325—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal
    • H02M3/335—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only
    • H02M3/33569—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only having several active switching elements
    • H02M3/33576—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only having several active switching elements having at least one active switching element at the secondary side of an isolation transformer
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
    • H02M7/02—Conversion of ac power input into dc power output without possibility of reversal
    • H02M7/04—Conversion of ac power input into dc power output without possibility of reversal by static converters

Definitions

  • the invention relates to the field of Internet of Things monitoring systems, and discloses a noise reduction system and a noise reduction method of the Internet of Things monitoring system.
  • Security engineering is an enterprise engaged in the construction, installation, maintenance and service of security equipment. As an intermediary and bridge between security production enterprises and users, it plays a crucial role in promoting the rapid development of the security industry.
  • the security engineering system is for the purpose of maintaining social and public safety, using security products and other related products to form an intrusion alarm system, video security monitoring system, access control system, explosion-proof security inspection system, etc.; or these systems are combined as subsystems or integrated electronic systems or networks.
  • the Internet of Things monitoring system collects signals through cameras and audio acquisition devices installed in different environments and different locations, so as to transmit these signals through the Internet of Things, and control the terminal to receive the signals. , and decode it so as to perform image broadcasting through the display device and audio device, so as to complete the long-distance monitoring.
  • a noise reduction system and noise reduction method of an Internet of Things monitoring system are provided to solve the above problems.
  • a noise reduction system for an IoT monitoring system comprising:
  • a voltage regulation unit for input voltage regulation for input voltage regulation
  • Filtered output unit for voltage output filtering while preventing output voltage transients.
  • the voltage stabilization filter unit includes: a fuse FU1, a rectifier bridge BR1, a capacitor C1, a voltage regulator U1, a capacitor C2, and a resistor R3;
  • the input end of BR1 is connected to the other end of the fuse FU1 and input voltage, the output end of the rectifier bridge BR1 is connected to both ends of the capacitor C1, and the No. 1 pin of the voltage stabilizer U1 is connected to the One end of the capacitor C1 is connected, the No. 2 pin of the voltage stabilizer U1 is connected to the other end of the capacitor C1, one end of the capacitor C2 and one end of the resistor R3 are connected and grounded at the same time, and the voltage stabilizer U1 The No. 3 pin is connected to the other end of the capacitor C2.
  • the rate enhancement unit includes: MOS transistor Q1, MOS transistor Q2, MOS transistor Q3, MOS transistor Q4, MOS transistor Q5, MOS transistor Q6, MOS transistor Q7, MOS transistor Q8, MOS transistor Q9, MOS transistor Q10 , operational amplifier U3A, resistor R9, transformer TR1; wherein, the source of the MOS transistor Q1 is connected to the source of the MOS transistor Q4 and the drain of the MOS transistor Q3 at the same time, and the source of the MOS transistor Q2 At the same time, it is connected to the source of the MOS transistor Q5 and the drain of the MOS transistor Q3, the gate of the MOS transistor Q3 is connected to the gate of the MOS transistor Q6, and the gate of the MOS transistor Q4 is connected to the gate of the MOS transistor Q4.
  • the gate of the MOS transistor Q5 is connected to the source of the MOS transistor Q3, the gate of the MOS transistor Q4 is connected to the gate of the MOS transistor Q5 and is connected to the source of the MOS transistor Q3,
  • the No. 3 pin of the operational amplifier U3A is connected to the source of the MOS transistor Q6, the No. 2 pin of the operational amplifier U3A is connected to one end of the resistor R9, and the No. 11 pin of the operational amplifier U3A At the same time, it is connected to the drain of the MOS transistor Q5 and the drain of the MOS transistor Q8, the drain of the MOS transistor Q4 is connected to the drain of the MOS transistor Q5, and the drain of the MOS transistor Q9 is simultaneously connected to the drain of the MOS transistor Q5.
  • the drain of the MOS transistor Q8 is connected to the drain of the MOS transistor Q10, and the No. 1 pin of the operational amplifier U3A is simultaneously connected to the source of the MOS transistor Q8 and the source of the MOS transistor Q7,
  • the gate of the MOS transistor Q8 is connected to the source of the MOS transistor Q9 and to the input end of the transformer TR1
  • the gate of the MOS transistor Q7 is connected to the source of the MOS transistor Q10 and to the The input end of the transformer TR1 is connected
  • the No. 4 pin of the operational amplifier U3A is connected to the drain of the MOS transistor Q7 and the other end of the resistor R9 is connected to the ground at the same time, and the source of the MOS transistor Q9 is simultaneously connected to the ground.
  • the drain of the MOS transistor Q7 is connected to the source of the MOS transistor Q10, and the source of the MOS transistor Q3 is connected to the drain of the MOS transistor Q1, the drain of the MOS transistor Q2 and the resistor at the same time Connect the other end of R9.
  • the voltage adjustment unit includes: a capacitor C6, a resistor R16, a differential mode inductor L1, a transistor Q13, a diode D2, a capacitor C5, a resistor R10, a resistor R11, a transistor Q12, a transistor Q11, a resistor R12, a diode D1, Adjustable resistor RV1, adjustable resistor RV2, resistor R13, resistor R14, resistor R15, and Schottky diode D3; wherein, the collector of the transistor Q13 is simultaneously connected to the anode of the diode D2, one end of the capacitor C5, and the One end of the capacitor C6, one end of the resistor R16 and one end of the adjustable resistor RV2 are connected, the emitter of the transistor Q12 is connected to one end of the resistor R10 and the base of the transistor Q13 at the same time, the The emitter of the transistor Q13 is connected to the other end of the resistor R10 and the other end of the capacitor C6 at the same time,
  • One end of the adjustable resistor RV1 is connected to one end of the resistor R13, the emitter of the transistor Q11 is connected to the control end of the adjustable resistor RV2 at the same time, and the other end of the adjustable resistor RV2 is connected to the resistor R15
  • One end of the transistor Q12 is connected to one end of the resistor R14, the other end of the resistor R14 is connected to the other end of the resistor R13 and the other end of the resistor R15 at the same time, the resistor R13
  • the other end of the capacitor C5 is connected to the negative electrode of the Schottky diode D3
  • the control end of the adjustable resistor RV1 is connected to the positive electrode of the Schottky diode D3
  • the other end of the capacitor C5 is connected to the diode D2 at the same time.
  • the negative electrode is connected to the other end of the resistor R15, and the other end of the differential mode inductor L1 is connected to the negative electrode of the diode D2.
  • the filtering output unit includes: an operational amplifier U2A, an operational amplifier U2B, an operational amplifier U2C, a resistor R1, a resistor R2, a resistor R5, a resistor R8, a resistor R4, a resistor R6, a resistor R7, a capacitor C3, and a capacitor C4;
  • the No. 3 pin of the operational amplifier U2A is connected to one end of the resistor R1 and one end of the resistor R8 at the same time
  • the No. 2 pin of the operational amplifier U2A is connected to one end of the resistor R4, and the The No. 1 pin of the operational amplifier U2A is simultaneously connected to the other end of the resistor R1 and one end of the resistor R2, and the No.
  • the gate of the MOS transistor Q1 is connected to the other end of the capacitor C2
  • the gate of the MOS transistor Q2 is connected to the other end of the resistor R3
  • the other end of the capacitor C6 is connected to the output end of the transformer TR1
  • the differential mode inductor The other end of L1 is connected to the output end of the transformer TR1
  • the No. 3 pin of the operational amplifier U2A is connected to the positive pole of the Schottky diode D3
  • the No. 2 pin of the operational amplifier U2A is connected to the negative pole of the Schottky diode D3.
  • a noise reduction method for a noise reduction system of an Internet of Things monitoring system comprising the following steps:
  • Step 1 When the audio and video monitoring system is working, the rectification and voltage stabilization of the power supply voltage are performed by the voltage stabilization filter unit;
  • Step 2 the voltage is enhanced by the input rate enhancement unit to enhance the voltage conversion efficiency, wherein the voltage signal is amplified by the primary amplifier circuit and the secondary amplifier circuit, so as to input the enhancement circuit to enhance the conversion rate, so as to convert the voltage through the transformer
  • Step 3 The converted output DC voltage is adjusted in real time through the input voltage adjustment unit, so that the working voltage can be effectively stabilized, so that the output voltage meets the working needs and is stable, thereby preventing voltage offset;
  • Step 4 The output voltage is filtered by a low-pass filter unit composed of an amplifier to filter out high-frequency signals, thereby reducing noise generation and improving the signal-to-noise ratio of the signal.
  • step 3 it can be further obtained:
  • Step 5 When the audio and video components in the audio and video monitoring system are working, due to the slow conversion rate of the changing power supply voltage, the voltage signal will bounce back, resulting in noise. At this time, the voltage signal passes through the MOS transistor Q1 and the MOS transistor Q2.
  • the input circuit in which MOS transistor Q1, MOS transistor Q2, MOS transistor Q3, MOS transistor Q4, MOS transistor Q5, and MOS transistor Q6 form a primary amplifier circuit, so as to perform a primary amplification and reversal of the signal, and the operational amplifier U3A cooperates with the resistor R9 to form a secondary Amplifying circuit, and MOS transistor Q7, MOS transistor Q8, MOS transistor Q9, and MOS transistor Q10 form an enhanced circuit, thereby increasing the conversion rate.
  • step 5 it can be further obtained:
  • Step 6 the current of the output MOS transistor Q1 and MOS transistor Q2 is recorded as I1
  • the current of the output MOS transistor Q3 is recorded as I2
  • the current of the output MOS transistor Q7 is recorded as I3
  • the current flowing into the MOS transistor Q8 is recorded as I6
  • the current of the output MOS transistor Q8 and MOS transistor Q9 is remembered as I4, and the current of the output MOS transistor Q10 is recorded as I5; during normal operation, the current flowing into the MOS transistor Q9 is greater than I4, and I5 is greater than the current flowing into the MOS transistor Q10, thus
  • the output voltage of MOS transistor Q8 is high level, and the output voltage of MOS transistor Q7 is low level, so that MOS transistor Q8 and MOS transistor Q7 are not conducting.
  • MOS transistor Q2 When a positive signal is input to MOS transistor Q1, MOS transistor Q2 is at this time. Cut off, so that all I1 flows into the MOS transistor Q1, so that the current flowing into the MOS transistor Q4 becomes smaller instantly, and the currents on the corresponding mirror transistors MOS transistor Q9 and MOS transistor Q10 also become very small, so at this time I4 is greater than the inflow MOS transistor Q9.
  • the current of I5 is greater than the current flowing into the MOS transistor Q10, so the voltage output by the MOS transistor Q8 changes from a high level to a low level, and the output voltage of the MOS transistor Q7 is a low level, so that the MOS transistor Q8 is turned on, so that I6 gives the operation
  • the output of amplifier U3A provides current, which accelerates the forward slew rate
  • the MOS transistor Q1 when a negative signal is input to the MOS transistor Q2, the MOS transistor Q1 is turned off, so that all I1 flows into the MOS transistor Q2, so that the current flowing into the MOS transistor Q4 increases instantaneously, and the corresponding mirror transistors MOS transistor Q9 and MOS transistor Q10 currents on It also becomes very large, so that at this time I4 is less than the current flowing into the MOS transistor Q9, and I5 is less than the current flowing into the MOS transistor Q10, so the voltage output by the MOS transistor Q8 turns to a high level, and the output voltage of the MOS transistor Q7 changes from a low level. Turning to a high level, the MOS transistor Q7 is turned on, so that I3 provides current to the output terminal of the operational amplifier U3A, thereby accelerating the reverse slew rate.
  • step 4 it can be further obtained: when the voltage signal passes through the input filtering output unit, the high-pass signal is taken by the operational amplifier U2A, and the low-pass signal is taken by the operational amplifier U2B, so that the operational amplifier U2C is filtered. output.
  • the voltage input to the Internet of Things monitoring system is rectified and stabilized by the rectifying and voltage-stabilizing unit, thereby stabilizing the voltage.
  • the conversion rate is enhanced by the rate-enhancing unit, and the rate-enhancing unit is at the same time.
  • the AC voltage is converted into a DC voltage by using a transformer, and at the same time, the DC voltage outputs a stable voltage through the voltage adjustment unit, so that the voltage is output through the filter output unit; the present invention can quickly perform voltage conversion, so as to prevent the voltage from appearing instantaneously. Change and conversion transient problems, thereby reducing noise, while only outputting low-frequency signals to the circuit and adjusting the output voltage, which can prevent voltage drift and improve work efficiency.
  • FIG. 1 is a schematic diagram of the working circuit of the present invention.
  • FIG. 2 is a circuit diagram of a rectifying and voltage-stabilizing unit of the present invention.
  • FIG. 3 is a circuit diagram of a rate enhancement unit of the present invention.
  • FIG. 4 is a circuit diagram of the voltage adjustment unit of the present invention.
  • FIG. 5 is a circuit diagram of the filter output unit of the present invention.
  • a noise reduction system and a noise reduction method for an IoT monitoring system include: a rectification voltage regulator unit, a rate enhancement unit, a voltage adjustment unit, and a filter output unit.
  • the voltage stabilization filter unit includes: a fuse FU1, a rectifier bridge BR1, a capacitor C1, a voltage regulator U1, a capacitor C2, and a resistor R3.
  • the rate enhancement unit includes: MOS transistor Q1, MOS transistor Q2, MOS transistor Q3, MOS transistor Q4, MOS transistor Q5, MOS transistor Q6, MOS transistor Q7, MOS transistor Q8, MOS transistor Q9, MOS transistor Q10 , operational amplifier U3A, resistor R9, transformer TR1.
  • the voltage adjustment unit includes: capacitor C6, resistor R16, differential mode inductor L1, transistor Q13, diode D2, capacitor C5, resistor R10, resistor R11, transistor Q12, transistor Q11, resistor R12, diode D1, Adjustable resistance RV1, adjustable resistance RV2, resistance R13, resistance R14, resistance R15, Schottky diode D3.
  • the filter output unit includes: an operational amplifier U2A, an operational amplifier U2B, an operational amplifier U2C, a resistor R1, a resistor R2, a resistor R5, a resistor R8, a resistor R4, a resistor R6, a resistor R7, a capacitor C3, and a capacitor C4.
  • one end of the fuse FU1 is input voltage
  • the input end of the rectifier bridge BR1 is connected to the other end of the fuse FU1 and input voltage
  • the output end of the rectifier bridge BR1 is connected to the Both ends of the capacitor C1 are connected
  • the No. 1 pin of the voltage stabilizer U1 is connected to one end of the capacitor C1
  • the No. 2 pin of the voltage stabilizer U1 is simultaneously connected to the other end of the capacitor C1
  • the One end of the capacitor C2 is connected to one end of the resistor R3 and is grounded
  • the No. 3 pin of the voltage regulator U1 is connected to the other end of the capacitor C2.
  • the source of the MOS transistor Q1 is simultaneously connected to the source of the MOS transistor Q4 and the drain of the MOS transistor Q3, and the source of the MOS transistor Q2 is simultaneously connected to the MOS transistor
  • the source of Q5 is connected to the drain of the MOS transistor Q3, the gate of the MOS transistor Q3 is connected to the gate of the MOS transistor Q6, the gate of the MOS transistor Q4 is connected to the gate of the MOS transistor Q5 connected to the source of the MOS transistor Q3, the gate of the MOS transistor Q4 is connected to the gate of the MOS transistor Q5 and connected to the source of the MOS transistor Q3, the operational amplifier U3A Pin No. 3 is connected to the source of the MOS tube Q6, pin No.
  • the drain of Q5 is connected to the drain of the MOS transistor Q8, the drain of the MOS transistor Q4 is connected to the drain of the MOS transistor Q5, and the drain of the MOS transistor Q9 is simultaneously connected to the drain of the MOS transistor Q8.
  • the drain is connected to the drain of the MOS transistor Q10, and the No. 1 pin of the operational amplifier U3A is connected to the source of the MOS transistor Q8 and the source of the MOS transistor Q7 at the same time.
  • the gate is connected to the source of the MOS transistor Q9 and the input terminal of the transformer TR1
  • the gate of the MOS transistor Q7 is connected to the source of the MOS transistor Q10 and is connected to the input terminal of the transformer TR1 connected
  • the No. 4 pin of the operational amplifier U3A is connected to the drain of the MOS transistor Q7 and the other end of the resistor R9 and grounded at the same time
  • the source of the MOS transistor Q9 is simultaneously connected to the MOS transistor Q7.
  • the drain is connected to the source of the MOS transistor Q10, and the source of the MOS transistor Q3 is simultaneously connected to the drain of the MOS transistor Q1, the drain of the MOS transistor Q2 and the other end of the resistor R9.
  • the collector of the transistor Q13 is simultaneously connected to the anode of the diode D2, one end of the capacitor C5, one end of the capacitor C6, one end of the resistor R16 and the adjustable resistor RV2 one end of the transistor Q12 is connected to one end of the resistor R10 and the base of the transistor Q13, the emitter of the transistor Q13 is simultaneously connected to the other end of the resistor R10 and the capacitor C6
  • the other end of the transistor Q11 is connected to the base of the transistor Q12 and one end of the resistor R11 at the same time
  • the base of the transistor Q11 is connected to the cathode of the diode D1 and the resistor R12 at the same time
  • one end of the resistor R16 is connected to one end of the differential mode inductor L1
  • the anode of the diode D1 is connected to one end of the adjustable resistor RV1 and one end of the resistor R13 at the same time
  • the triode The emitter of Q11 is simultaneously connected to the control terminal of the adjustable
  • the No. 3 pin of the operational amplifier U2A is connected to one end of the resistor R1 and the one end of the resistor R8 at the same time, and the No. 2 pin of the operational amplifier U2A is connected to the resistor R4.
  • One end is connected, the No. 1 pin of the operational amplifier U2A is connected to the other end of the resistor R1 and one end of the resistor R2 at the same time, the No. 5 pin of the operational amplifier U2B is simultaneously connected to one end of the capacitor C3 and one end of the resistor R2.
  • the other end of the resistor R2 is connected, the No. 6 pin of the operational amplifier U2B is connected to one end of the resistor R5, the other end of the resistor R5 is grounded, and the No.
  • the gate of the MOS transistor Q1 is connected to the other end of the capacitor C2, the gate of the MOS transistor Q2 is connected to the other end of the resistor R3, the other end of the capacitor C6 is connected to the output end of the transformer TR1, and the differential mode
  • the other end of the inductor L1 is connected to the output end of the transformer TR1, the No. 3 pin of the operational amplifier U2A is connected to the positive pole of the Schottky diode D3, and the No. 2 pin of the operational amplifier U2A is connected to the negative pole of the Schottky diode D3.
  • the power supply voltage enters the rectifier bridge BR1 through the fuse FU1, the fuse FU1 protects the input voltage, and the rectifier bridge BR1 performs voltage rectification, so that the output voltage is filtered through the capacitor C1.
  • the input voltage regulator U1, the voltage stabilizer U1 performs voltage stabilization through the input value capacitor C2 of the No. 2 pin of the voltage stabilizer U1 to filter the output, and the resistor R3 protects the output;
  • the voltage signal is input to the rate enhancement unit.
  • the current of the output MOS transistor Q1 and MOS transistor Q2 is recorded as I1
  • the current of the output MOS transistor Q3 is recorded as I2
  • the current of the output MOS transistor Q7 is recorded as I3
  • the current flowing into the MOS transistor Q8 is recorded as I3.
  • the current is recorded as I6, the current of the output MOS transistor Q8 and MOS transistor Q9 is remembered as I4, and the current of the output MOS transistor Q10 is recorded as I5; during normal operation, the current flowing into the MOS transistor Q9 is greater than I4, and I5 is greater than that flowing into the MOS transistor.
  • the voltage is converted into DC voltage through the transformer TR1, and the voltage is controlled by the input voltage adjustment unit. At this time, the voltage is input through one end of the capacitor C6 and one end of the differential mode inductor L1. At this time, the transistor Q13 is energized, so the transistor Q13 cooperates with the diode D2. A switch circuit is formed.
  • the capacitor C5 cooperates with the adjustable resistor RV2 and the resistor R5 to form a demodulation circuit. By changing the resistance value of the resistor R5, the base of the transistor Q13 is turned on, so that the transistor Q12 is energized and output. When the voltage meets the working conditions In the range, the output value of the transistor Q11 is carried out through the base of the transistor Q12.
  • the resistor R11 and the resistor R12 are protected, the base of the transistor Q11 is output, and the adjustable resistor RV1 is composed of the resistor R3 and the Schottky diode D3.
  • the output circuit is compared to output the voltage-to-rate output circuit; the voltage signal takes the high-pass signal through the operational amplifier U2A, and then takes the low-pass signal through the operational amplifier U2B, so that the operational amplifier U2C filters the output.

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  • Power Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
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Abstract

The present invention relates to the field of Internet of Things monitoring systems. Disclosed are a noise reduction system for an Internet of Things monitoring system, and a noise reduction method, comprising: a rectification and voltage stabilization unit, a rate enhancement unit, a voltage adjustment unit, and a filter output unit. A rectification operation and a voltage stabilization operation are performed on an input voltage of an audio/video device by means of the rectification and voltage stabilization unit, a conversion rate is enhanced by means of the rate enhancement unit when a voltage DC conversion is performed, an alternating current voltage is converted into a direct current voltage by means of a transformer in the rate enhancement unit, the direct current voltage is output as a stable voltage by means of the voltage adjustment unit, and thus the voltage is output by means of the filter output unit. Voltage conversion can be performed rapidly, the problems of transient voltage and transient conversion can be prevented, noise is reduced, only low-frequency signals are output to a circuit, output voltage adjustment is performed, voltage drift can be prevented, and operational efficiency is increased.

Description

一种物联网监控系统的降噪系统及降噪方法Noise reduction system and noise reduction method for Internet of things monitoring system 技术领域technical field
本发明涉及物联网监控系统领域，公开了一种物联网监控系统的降噪系统及降噪方法。 The invention relates to the field of Internet of Things monitoring systems, and discloses a noise reduction system and a noise reduction method of the Internet of Things monitoring system.
背景技术Background technique
安防工程是从事安防装备的施工、装置、维护和效劳的企业。作为安防生产企业与用户之间的中介和桥梁，它在推进安防行业快速发展的进程中起着至关主要的作用。安防工程系统是以维护社会公共安全为目的，运用安全防范产品和其他相关产品所构成的入侵报警系统、视频安防监控系统、出入口控制系统、防爆安全检查系统等；或由这些系统为子系统组合或集成的电子系统或网络。Security engineering is an enterprise engaged in the construction, installation, maintenance and service of security equipment. As an intermediary and bridge between security production enterprises and users, it plays a crucial role in promoting the rapid development of the security industry. The security engineering system is for the purpose of maintaining social and public safety, using security products and other related products to form an intrusion alarm system, video security monitoring system, access control system, explosion-proof security inspection system, etc.; or these systems are combined as subsystems or integrated electronic systems or networks.
物联网监控系统作为安防工程系统很重要的一个子系统，通过设置在各个不同环境，不同位置的摄像、音频采集装置进行采集信号，从而将这些信号通过物联网进行传输，且控制终端进行接收信号，并且进行解码从而通过显示装置和音频装置进行成像播音，从而完成远距离监控。As a very important subsystem of the security engineering system, the Internet of Things monitoring system collects signals through cameras and audio acquisition devices installed in different environments and different locations, so as to transmit these signals through the Internet of Things, and control the terminal to receive the signals. , and decode it so as to perform image broadcasting through the display device and audio device, so as to complete the long-distance monitoring.
现有技术中的物联网监控系统在进行信号解码时，此时电源电压需要对成像波音装置进行输入电压，此时因为电压需要转换，从而会出现电压瞬变和转换瞬变的问题，从而产生噪音，从而使得电路产生高频信号，从而会影响输出电压与实际电压不符合的情况，严重时会产生电压漂移，严重影响工作效率。When the Internet of Things monitoring system in the prior art performs signal decoding, the power supply voltage needs to input voltage to the imaging Boeing device. At this time, because the voltage needs to be converted, there will be problems of voltage transients and conversion transients, resulting in Noise, which will cause the circuit to generate high-frequency signals, which will affect the situation that the output voltage does not match the actual voltage. In severe cases, voltage drift will occur, which will seriously affect the work efficiency.
技术问题technical problem
提供一种物联网监控系统的降噪系统及降噪方法，以解决上述问题。A noise reduction system and noise reduction method of an Internet of Things monitoring system are provided to solve the above problems.
技术解决方案technical solutions
一种物联网监控系统的降噪系统，包括：A noise reduction system for an IoT monitoring system, comprising:
用于进行音视频监控系统供电，同时进行电源电稳压滤波的稳压滤波单元；It is a voltage-stabilizing filter unit used for power supply of audio and video monitoring system and voltage-stabilizing and filtering of power supply voltage at the same time;
用于进行输入电源电压转换，同时进行防止输入电压瞬变的速率增强单元；A rate enhancement unit for input supply voltage conversion while simultaneously preventing input voltage transients;
用于进行输入电压调节的电压调节单元；A voltage regulation unit for input voltage regulation;
用于进行电压输出滤波，同时防止输出电压瞬变的滤波输出单元。Filtered output unit for voltage output filtering while preventing output voltage transients.
在一个实施例中，稳压滤波单元包括：熔断器FU1、整流桥BR1、电容C1、稳压器U1、电容C2、电阻R3；其中，所述熔断器FU1的一端输入电压，所述整流桥BR1的输入端与所述熔断器FU1的另一端连接且输入电压，所述整流桥BR1的输出端与所述电容C1的两端连接，所述稳压器U1的1号引脚与所述电容C1的一端连接，所述稳压器U1的2号引脚同时与所述电容C1的另一端、所述电容C2的一端和所述电阻R3的一端连接且接地，所述稳压器U1的3号引脚与所述电容C2的另一端连接。In one embodiment, the voltage stabilization filter unit includes: a fuse FU1, a rectifier bridge BR1, a capacitor C1, a voltage regulator U1, a capacitor C2, and a resistor R3; The input end of BR1 is connected to the other end of the fuse FU1 and input voltage, the output end of the rectifier bridge BR1 is connected to both ends of the capacitor C1, and the No. 1 pin of the voltage stabilizer U1 is connected to the One end of the capacitor C1 is connected, the No. 2 pin of the voltage stabilizer U1 is connected to the other end of the capacitor C1, one end of the capacitor C2 and one end of the resistor R3 are connected and grounded at the same time, and the voltage stabilizer U1 The No. 3 pin is connected to the other end of the capacitor C2.
在一个实施例中，速率增强单元包括：MOS管Q1、MOS管Q2、MOS管Q3、MOS管Q4、MOS管Q5、MOS管Q6、MOS管Q7、MOS管Q8、MOS管Q9、MOS管Q10、运算放大器U3A、电阻R9、变压器TR1；其中，所述MOS管Q1的源极同时与所述MOS管Q4的源极和所述MOS管Q3的漏极连接，所述MOS管Q2的源极同时与所述MOS管Q5的源极和所述MOS管Q3的漏极连接，所述MOS管Q3的栅极和所述MOS管Q6的栅极连接，所述MOS管Q4的栅极和所述MOS管Q5的栅极连接且与所述MOS管Q3的源极连接，所述MOS管Q4的栅极和所述MOS管Q5的栅极连接且与所述MOS管Q3的源极连接，所述运算放大器U3A的3号引脚与所述MOS管Q6的源极连接，所述运算放大器U3A的2号引脚与所述电阻R9的一端连接，所述运算放大器U3A的11号引脚同时与所述MOS管Q5的漏极和所述MOS管Q8的漏极连接，所述MOS管Q4的漏极与所述MOS管Q5的漏极连接，所述MOS管Q9的漏极同时与所述MOS管Q8的漏极和所述MOS管Q10的漏极连接，所述运算放大器U3A的1号引脚同时与所述MOS管Q8的源极和所述MOS管Q7的源极连接，所述MOS管Q8的栅极与所述MOS管Q9的源极连接且与所述变压器TR1的输入端连接，所述MOS管Q7的栅极与所述MOS管Q10的源极连接且与所述变压器TR1的输入端连接，所述运算放大器U3A的4号引脚同时与所述MOS管Q7的漏极和所述电阻R9的另一端连接且接地，所述MOS管Q9的源极同时与所述MOS管Q7的漏极和所述MOS管Q10的源极连接，所述MOS管Q3的源极同时与所述MOS管Q1的漏极、所述MOS管Q2的漏极和所述电阻R9的另一端连接。In one embodiment, the rate enhancement unit includes: MOS transistor Q1, MOS transistor Q2, MOS transistor Q3, MOS transistor Q4, MOS transistor Q5, MOS transistor Q6, MOS transistor Q7, MOS transistor Q8, MOS transistor Q9, MOS transistor Q10 , operational amplifier U3A, resistor R9, transformer TR1; wherein, the source of the MOS transistor Q1 is connected to the source of the MOS transistor Q4 and the drain of the MOS transistor Q3 at the same time, and the source of the MOS transistor Q2 At the same time, it is connected to the source of the MOS transistor Q5 and the drain of the MOS transistor Q3, the gate of the MOS transistor Q3 is connected to the gate of the MOS transistor Q6, and the gate of the MOS transistor Q4 is connected to the gate of the MOS transistor Q4. The gate of the MOS transistor Q5 is connected to the source of the MOS transistor Q3, the gate of the MOS transistor Q4 is connected to the gate of the MOS transistor Q5 and is connected to the source of the MOS transistor Q3, The No. 3 pin of the operational amplifier U3A is connected to the source of the MOS transistor Q6, the No. 2 pin of the operational amplifier U3A is connected to one end of the resistor R9, and the No. 11 pin of the operational amplifier U3A At the same time, it is connected to the drain of the MOS transistor Q5 and the drain of the MOS transistor Q8, the drain of the MOS transistor Q4 is connected to the drain of the MOS transistor Q5, and the drain of the MOS transistor Q9 is simultaneously connected to the drain of the MOS transistor Q5. The drain of the MOS transistor Q8 is connected to the drain of the MOS transistor Q10, and the No. 1 pin of the operational amplifier U3A is simultaneously connected to the source of the MOS transistor Q8 and the source of the MOS transistor Q7, The gate of the MOS transistor Q8 is connected to the source of the MOS transistor Q9 and to the input end of the transformer TR1, the gate of the MOS transistor Q7 is connected to the source of the MOS transistor Q10 and to the The input end of the transformer TR1 is connected, the No. 4 pin of the operational amplifier U3A is connected to the drain of the MOS transistor Q7 and the other end of the resistor R9 is connected to the ground at the same time, and the source of the MOS transistor Q9 is simultaneously connected to the ground. The drain of the MOS transistor Q7 is connected to the source of the MOS transistor Q10, and the source of the MOS transistor Q3 is connected to the drain of the MOS transistor Q1, the drain of the MOS transistor Q2 and the resistor at the same time Connect the other end of R9.
在一个实施例中，电压调节单元包括：电容C6、电阻R16、差模电感L1、三极管Q13、二极管D2、电容C5、电阻R10、电阻R11、三极管Q12、三极管Q11、电阻R12、二极管D1、可调电阻RV1、可调电阻RV2、电阻R13、电阻R14、电阻R15、肖特基二极管D3；其中，所述三极管Q13的集电极同时与所述二极管D2的正极、所述电容C5的一端、所述电容C6的一端、所述电阻R16的一端和所述可调电阻RV2的一端连接，所述三极管Q12的发射极同时与所述电阻R10的一端和所述三极管Q13的基极连接，所述三极管Q13的发射极同时与所述电阻R10的另一端和所述电容C6的另一端连接，所述三极管Q11的集电极同时与所述三极管Q12的基极和所述电阻R11的一端连接，所述三极管Q11的基极同时与所述二极管D1的负极和所述电阻R12的一端连接，所述电阻R16的另一端与所述差模电感L1的一端连接，所述二极管D1的正极同时与所述可调电阻RV1的一端和所述电阻R13的一端连接，所述三极管Q11的发射极同时与所述可调电阻RV2的控制端连接，所述可调电阻RV2的另一端和所述电阻R15的一端连接，所述三极管Q12的集电极与所述电阻R14的一端连接，所述电阻R14的另一端同时与所述电阻R13的另一端和所述电阻R15的另一端连接，所述电阻R13的另一端与所述肖特基二极管D3的负极连接，所述可调电阻RV1的控制端与所述肖特基二极管D3的正极连接，所述电容C5的另一端同时与所述二极管D2的负极和所述电阻R15的另一端连接，所述差模电感L1的路另一端与所述二极管D2的负极连接。In one embodiment, the voltage adjustment unit includes: a capacitor C6, a resistor R16, a differential mode inductor L1, a transistor Q13, a diode D2, a capacitor C5, a resistor R10, a resistor R11, a transistor Q12, a transistor Q11, a resistor R12, a diode D1, Adjustable resistor RV1, adjustable resistor RV2, resistor R13, resistor R14, resistor R15, and Schottky diode D3; wherein, the collector of the transistor Q13 is simultaneously connected to the anode of the diode D2, one end of the capacitor C5, and the One end of the capacitor C6, one end of the resistor R16 and one end of the adjustable resistor RV2 are connected, the emitter of the transistor Q12 is connected to one end of the resistor R10 and the base of the transistor Q13 at the same time, the The emitter of the transistor Q13 is connected to the other end of the resistor R10 and the other end of the capacitor C6 at the same time, and the collector of the transistor Q11 is connected to the base of the transistor Q12 and one end of the resistor R11 at the same time, so The base of the transistor Q11 is connected to the cathode of the diode D1 and one end of the resistor R12 at the same time, the other end of the resistor R16 is connected to one end of the differential mode inductor L1, and the anode of the diode D1 is connected to the same. One end of the adjustable resistor RV1 is connected to one end of the resistor R13, the emitter of the transistor Q11 is connected to the control end of the adjustable resistor RV2 at the same time, and the other end of the adjustable resistor RV2 is connected to the resistor R15 One end of the transistor Q12 is connected to one end of the resistor R14, the other end of the resistor R14 is connected to the other end of the resistor R13 and the other end of the resistor R15 at the same time, the resistor R13 The other end of the capacitor C5 is connected to the negative electrode of the Schottky diode D3, the control end of the adjustable resistor RV1 is connected to the positive electrode of the Schottky diode D3, and the other end of the capacitor C5 is connected to the diode D2 at the same time. The negative electrode is connected to the other end of the resistor R15, and the other end of the differential mode inductor L1 is connected to the negative electrode of the diode D2.
在一个实施例中，滤波输出单元包括：运算放大器U2A、运算放大器U2B、运算放大器U2C、电阻R1、电阻R2、电阻R5、电阻R8、电阻R4、电阻R6、电阻R7、电容C3、电容C4；其中，所述运算放大器U2A的3号引脚同时与所述电阻R1的一端和所述电阻R8的一端连接，所述运算放大器U2A的2号引脚与所述电阻R4的一端连接，所述运算放大器U2A的1号引脚同时与所述电阻R1的另一端和所述电阻R2的一端连接，所述运算放大器U2B的5号引脚同时与所述电容C3的一端和所述电阻R2的另一端连接，所述运算放大器U2B的6号引脚与所述电阻R5的一端连接，所述电阻R5的另一端接地，所述运算放大器U2B的7号引脚同时与所述电容C3的另一端、所述电阻R6的一端和所述电阻R4的另一端连接，所述运算放大器U2C的10号引脚同时与所述电阻R6的另一端和所述电容C4的一端连接，所述运算放大器U2C的9号引脚与所述电阻R7的一端连接，所述运算放大器U2C的8号引脚同时与所述电容C4的另一端和所述电阻R8的另一端连接且输出，所述电阻R7的另一端接地。In one embodiment, the filtering output unit includes: an operational amplifier U2A, an operational amplifier U2B, an operational amplifier U2C, a resistor R1, a resistor R2, a resistor R5, a resistor R8, a resistor R4, a resistor R6, a resistor R7, a capacitor C3, and a capacitor C4; Wherein, the No. 3 pin of the operational amplifier U2A is connected to one end of the resistor R1 and one end of the resistor R8 at the same time, the No. 2 pin of the operational amplifier U2A is connected to one end of the resistor R4, and the The No. 1 pin of the operational amplifier U2A is simultaneously connected to the other end of the resistor R1 and one end of the resistor R2, and the No. 5 pin of the operational amplifier U2B is simultaneously connected to one end of the capacitor C3 and the one end of the resistor R2. The other end is connected, the No. 6 pin of the operational amplifier U2B is connected to one end of the resistor R5, the other end of the resistor R5 is grounded, and the No. 7 pin of the operational amplifier U2B is connected to the other end of the capacitor C3 at the same time. One end, one end of the resistor R6 and the other end of the resistor R4 are connected, the No. 10 pin of the operational amplifier U2C is connected to the other end of the resistor R6 and one end of the capacitor C4 at the same time, the operational amplifier Pin 9 of U2C is connected to one end of the resistor R7, and pin 8 of the operational amplifier U2C is connected to the other end of the capacitor C4 and the other end of the resistor R8 at the same time and outputs, the resistor R7 the other end is grounded.
在一个实施例中，MOS管Q1的栅极与电容C2的另一端连接，MOS管Q2的栅极与电阻R3的另一端连接，电容C6的另一端与变压器TR1的输出端连接，差模电感L1的另一端与变压器TR1的输出端连接，运算放大器U2A的3号引脚与肖特基二极管D3的正极连接，运算放大器U2A的2号引脚与肖特基二极管D3的负极连接。In one embodiment, the gate of the MOS transistor Q1 is connected to the other end of the capacitor C2, the gate of the MOS transistor Q2 is connected to the other end of the resistor R3, the other end of the capacitor C6 is connected to the output end of the transformer TR1, and the differential mode inductor The other end of L1 is connected to the output end of the transformer TR1, the No. 3 pin of the operational amplifier U2A is connected to the positive pole of the Schottky diode D3, and the No. 2 pin of the operational amplifier U2A is connected to the negative pole of the Schottky diode D3.
一种物联网监控系统的降噪系统的降噪方法，包括以下步骤：A noise reduction method for a noise reduction system of an Internet of Things monitoring system, comprising the following steps:
步骤1、当音视频监控系统进行工作时，通过稳压滤波单元进行电源电压的整流、稳压工作；Step 1. When the audio and video monitoring system is working, the rectification and voltage stabilization of the power supply voltage are performed by the voltage stabilization filter unit;
步骤2、其次电压通过输入速率增强单元进行电压转换效率的增强，其中电压信号通过一次放大电路、二次放大电路进行放大，从而输入增强电路进行转换速率的提升，从而经过变压器进行电压转换Step 2. Secondly, the voltage is enhanced by the input rate enhancement unit to enhance the voltage conversion efficiency, wherein the voltage signal is amplified by the primary amplifier circuit and the secondary amplifier circuit, so as to input the enhancement circuit to enhance the conversion rate, so as to convert the voltage through the transformer
步骤3、转换输出的直流电压通过输入电压调节单元，进行电压的实时调节，从而可以有效的稳定工作电压，从而使之输出符合工作需要且稳定的电压，从而防止电压偏移；Step 3. The converted output DC voltage is adjusted in real time through the input voltage adjustment unit, so that the working voltage can be effectively stabilized, so that the output voltage meets the working needs and is stable, thereby preventing voltage offset;
步骤4、输出电压通过由放大器组成的低通滤波单元进行滤除高频信号，从而减小噪音产生，提升信号的信噪比。Step 4. The output voltage is filtered by a low-pass filter unit composed of an amplifier to filter out high-frequency signals, thereby reducing noise generation and improving the signal-to-noise ratio of the signal.
在一个实施例中，根据步骤3可以进一步得出：In one embodiment, according to step 3, it can be further obtained:
步骤5、当音视频监控系统中音视频元件进行工作时，由于变化的电源电压转换速率慢的缘故，电压信号会出现反跳，从而产生噪声，此时电压信号通过MOS管Q1和MOS管Q2输入电路，其中MOS管Q1、MOS管Q2、MOS管Q3、MOS管Q4、MOS管Q5、MOS管Q6组成一次放大电路，从而进行信号的一次放大翻转，且运算放大器U3A配合电阻R9组成二次放大电路，且MOS管Q7、MOS管Q8、MOS管Q9、MOS管Q10组成增强电路，从而提升转换速率。Step 5. When the audio and video components in the audio and video monitoring system are working, due to the slow conversion rate of the changing power supply voltage, the voltage signal will bounce back, resulting in noise. At this time, the voltage signal passes through the MOS transistor Q1 and the MOS transistor Q2. The input circuit, in which MOS transistor Q1, MOS transistor Q2, MOS transistor Q3, MOS transistor Q4, MOS transistor Q5, and MOS transistor Q6 form a primary amplifier circuit, so as to perform a primary amplification and reversal of the signal, and the operational amplifier U3A cooperates with the resistor R9 to form a secondary Amplifying circuit, and MOS transistor Q7, MOS transistor Q8, MOS transistor Q9, and MOS transistor Q10 form an enhanced circuit, thereby increasing the conversion rate.
在一个实施例中，根据步骤5可以进一步得出：In one embodiment, according to step 5, it can be further obtained:
步骤6、此时将输出MOS管Q1和MOS管Q2的电流记作I1，输出MOS管Q3的电流记住I2，输出MOS管Q7的电流记作I3，流入MOS管Q8的电流记作I6，输出MOS管Q8和MOS管Q9的电流记住I4，输出MOS管Q10的电流记作I5；正常工作时，此时流入MOS管Q9的电流大于I4，而I5大于流入MOS管Q10的电流，从而MOS管Q8输出的电压为高电平，MOS管Q7的输出电压为低电平，从而MOS管Q8和MOS管Q7不导通，当在MOS管Q1输入一个正信号时，此时MOS管Q2截止，从而I1全部流入MOS管Q1，从而流入MOS管Q4的电流瞬间变小，相应的镜像管MOS管Q9和MOS管Q10上的电流也变得很小，从而此时I4大于流入MOS管Q9的电流，I5大于流入MOS管Q10的电流，从而MOS管Q8输出的电压从高电平转向低电平，MOS管Q7的输出电压为低电平，从而MOS管Q8导通，从而I6给运算放大器U3A输出端提供电流，从而加速了正向转换速率；Step 6. At this time, the current of the output MOS transistor Q1 and MOS transistor Q2 is recorded as I1, the current of the output MOS transistor Q3 is recorded as I2, the current of the output MOS transistor Q7 is recorded as I3, the current flowing into the MOS transistor Q8 is recorded as I6, The current of the output MOS transistor Q8 and MOS transistor Q9 is remembered as I4, and the current of the output MOS transistor Q10 is recorded as I5; during normal operation, the current flowing into the MOS transistor Q9 is greater than I4, and I5 is greater than the current flowing into the MOS transistor Q10, thus The output voltage of MOS transistor Q8 is high level, and the output voltage of MOS transistor Q7 is low level, so that MOS transistor Q8 and MOS transistor Q7 are not conducting. When a positive signal is input to MOS transistor Q1, MOS transistor Q2 is at this time. Cut off, so that all I1 flows into the MOS transistor Q1, so that the current flowing into the MOS transistor Q4 becomes smaller instantly, and the currents on the corresponding mirror transistors MOS transistor Q9 and MOS transistor Q10 also become very small, so at this time I4 is greater than the inflow MOS transistor Q9. The current of I5 is greater than the current flowing into the MOS transistor Q10, so the voltage output by the MOS transistor Q8 changes from a high level to a low level, and the output voltage of the MOS transistor Q7 is a low level, so that the MOS transistor Q8 is turned on, so that I6 gives the operation The output of amplifier U3A provides current, which accelerates the forward slew rate;
同样当在MOS管Q2输入一个负信号时，MOS管Q1截止，从而I1全部流入MOS管Q2，从而流入MOS管Q4的电流瞬间变大，相应的镜像管MOS管Q9和MOS管Q10上的电流也变得很大，从而此时I4小于流入MOS管Q9的电流，I5小于流入MOS管Q10的电流，从而MOS管Q8输出的电压为高电平转，MOS管Q7的输出电压从低电平转向高电平，从而MOS管Q7导通，从而I3给运算放大器U3A输出端提供电流，从而加速了反向转换速率。Similarly, when a negative signal is input to the MOS transistor Q2, the MOS transistor Q1 is turned off, so that all I1 flows into the MOS transistor Q2, so that the current flowing into the MOS transistor Q4 increases instantaneously, and the corresponding mirror transistors MOS transistor Q9 and MOS transistor Q10 currents on It also becomes very large, so that at this time I4 is less than the current flowing into the MOS transistor Q9, and I5 is less than the current flowing into the MOS transistor Q10, so the voltage output by the MOS transistor Q8 turns to a high level, and the output voltage of the MOS transistor Q7 changes from a low level. Turning to a high level, the MOS transistor Q7 is turned on, so that I3 provides current to the output terminal of the operational amplifier U3A, thereby accelerating the reverse slew rate.
在一个实施例中，根据步骤4可以进一步得出：当电压信号通过输入滤波输出单元，通过运算放大器U2A进行取高通信号，从而经过运算放大器U2B进行取低通信号，从而运算放大器U2C进行滤波输出。In one embodiment, according to step 4, it can be further obtained: when the voltage signal passes through the input filtering output unit, the high-pass signal is taken by the operational amplifier U2A, and the low-pass signal is taken by the operational amplifier U2B, so that the operational amplifier U2C is filtered. output.
有益效果beneficial effect
本发明通过对输入物联网监控系统的电压通过整流稳压单元进行整流工作和稳压工作，从而稳定电压，同时在进行电压DC转换时，通过速率增强单元进行增强转换速率，同时在速率增强单元中，利用变压器进行将交流电压转换成直流电压，同时直流电压通过电压调节单元进行输出稳定的电压，从而电压通过滤波输出单元进行输出；本发明可以快速的进行电压转换，从而可以防止电压出现瞬变和转换瞬变的问题，从而减小噪声，同时对电路只输出低频信号和进行输出电压调节，从而可以防止电压漂移，从而提高工作效率。In the present invention, the voltage input to the Internet of Things monitoring system is rectified and stabilized by the rectifying and voltage-stabilizing unit, thereby stabilizing the voltage. At the same time, when the voltage DC conversion is performed, the conversion rate is enhanced by the rate-enhancing unit, and the rate-enhancing unit is at the same time. In the process, the AC voltage is converted into a DC voltage by using a transformer, and at the same time, the DC voltage outputs a stable voltage through the voltage adjustment unit, so that the voltage is output through the filter output unit; the present invention can quickly perform voltage conversion, so as to prevent the voltage from appearing instantaneously. Change and conversion transient problems, thereby reducing noise, while only outputting low-frequency signals to the circuit and adjusting the output voltage, which can prevent voltage drift and improve work efficiency.
附图说明Description of drawings
图1是本发明的工作电路示意图。FIG. 1 is a schematic diagram of the working circuit of the present invention.
图2是本发明的整流稳压单元电路图。FIG. 2 is a circuit diagram of a rectifying and voltage-stabilizing unit of the present invention.
图3是本发明的速率增强单元电路图。FIG. 3 is a circuit diagram of a rate enhancement unit of the present invention.
图4是本发明的电压调节单元电路图。FIG. 4 is a circuit diagram of the voltage adjustment unit of the present invention.
图5是本发明的滤波输出单元电路图。FIG. 5 is a circuit diagram of the filter output unit of the present invention.
本发明的实施方式Embodiments of the present invention
如图1所示，在该实施例中，一种物联网监控系统的降噪系统及降噪方法，包括：整流稳压单元、速率增强单元、电压调节单元、以及滤波输出单元。As shown in FIG. 1 , in this embodiment, a noise reduction system and a noise reduction method for an IoT monitoring system include: a rectification voltage regulator unit, a rate enhancement unit, a voltage adjustment unit, and a filter output unit.
如图2所示，稳压滤波单元包括：熔断器FU1、整流桥BR1、电容C1、稳压器U1、电容C2、电阻R3。As shown in Figure 2, the voltage stabilization filter unit includes: a fuse FU1, a rectifier bridge BR1, a capacitor C1, a voltage regulator U1, a capacitor C2, and a resistor R3.
如图3所示，速率增强单元包括：MOS管Q1、MOS管Q2、MOS管Q3、MOS管Q4、MOS管Q5、MOS管Q6、MOS管Q7、MOS管Q8、MOS管Q9、MOS管Q10、运算放大器U3A、电阻R9、变压器TR1。As shown in Figure 3, the rate enhancement unit includes: MOS transistor Q1, MOS transistor Q2, MOS transistor Q3, MOS transistor Q4, MOS transistor Q5, MOS transistor Q6, MOS transistor Q7, MOS transistor Q8, MOS transistor Q9, MOS transistor Q10 , operational amplifier U3A, resistor R9, transformer TR1.
如图4所示，电压调节单元包括：电容C6、电阻R16、差模电感L1、三极管Q13、二极管D2、电容C5、电阻R10、电阻R11、三极管Q12、三极管Q11、电阻R12、二极管D1、可调电阻RV1、可调电阻RV2、电阻R13、电阻R14、电阻R15、肖特基二极管D3。As shown in Figure 4, the voltage adjustment unit includes: capacitor C6, resistor R16, differential mode inductor L1, transistor Q13, diode D2, capacitor C5, resistor R10, resistor R11, transistor Q12, transistor Q11, resistor R12, diode D1, Adjustable resistance RV1, adjustable resistance RV2, resistance R13, resistance R14, resistance R15, Schottky diode D3.
如图5所示，滤波输出单元包括：运算放大器U2A、运算放大器U2B、运算放大器U2C、电阻R1、电阻R2、电阻R5、电阻R8、电阻R4、电阻R6、电阻R7、电容C3、电容C4。As shown in FIG. 5 , the filter output unit includes: an operational amplifier U2A, an operational amplifier U2B, an operational amplifier U2C, a resistor R1, a resistor R2, a resistor R5, a resistor R8, a resistor R4, a resistor R6, a resistor R7, a capacitor C3, and a capacitor C4.
在进一步的实施例中，所述熔断器FU1的一端输入电压，所述整流桥BR1的输入端与所述熔断器FU1的另一端连接且输入电压，所述整流桥BR1的输出端与所述电容C1的两端连接，所述稳压器U1的1号引脚与所述电容C1的一端连接，所述稳压器U1的2号引脚同时与所述电容C1的另一端、所述电容C2的一端和所述电阻R3的一端连接且接地，所述稳压器U1的3号引脚与所述电容C2的另一端连接。In a further embodiment, one end of the fuse FU1 is input voltage, the input end of the rectifier bridge BR1 is connected to the other end of the fuse FU1 and input voltage, and the output end of the rectifier bridge BR1 is connected to the Both ends of the capacitor C1 are connected, the No. 1 pin of the voltage stabilizer U1 is connected to one end of the capacitor C1, and the No. 2 pin of the voltage stabilizer U1 is simultaneously connected to the other end of the capacitor C1, the One end of the capacitor C2 is connected to one end of the resistor R3 and is grounded, and the No. 3 pin of the voltage regulator U1 is connected to the other end of the capacitor C2.
在进一步的实施例中，所述MOS管Q1的源极同时与所述MOS管Q4的源极和所述MOS管Q3的漏极连接，所述MOS管Q2的源极同时与所述MOS管Q5的源极和所述MOS管Q3的漏极连接，所述MOS管Q3的栅极和所述MOS管Q6的栅极连接，所述MOS管Q4的栅极和所述MOS管Q5的栅极连接且与所述MOS管Q3的源极连接，所述MOS管Q4的栅极和所述MOS管Q5的栅极连接且与所述MOS管Q3的源极连接，所述运算放大器U3A的3号引脚与所述MOS管Q6的源极连接，所述运算放大器U3A的2号引脚与所述电阻R9的一端连接，所述运算放大器U3A的11号引脚同时与所述MOS管Q5的漏极和所述MOS管Q8的漏极连接，所述MOS管Q4的漏极与所述MOS管Q5的漏极连接，所述MOS管Q9的漏极同时与所述MOS管Q8的漏极和所述MOS管Q10的漏极连接，所述运算放大器U3A的1号引脚同时与所述MOS管Q8的源极和所述MOS管Q7的源极连接，所述MOS管Q8的栅极与所述MOS管Q9的源极连接且与所述变压器TR1的输入端连接，所述MOS管Q7的栅极与所述MOS管Q10的源极连接且与所述变压器TR1的输入端连接，所述运算放大器U3A的4号引脚同时与所述MOS管Q7的漏极和所述电阻R9的另一端连接且接地，所述MOS管Q9的源极同时与所述MOS管Q7的漏极和所述MOS管Q10的源极连接，所述MOS管Q3的源极同时与所述MOS管Q1的漏极、所述MOS管Q2的漏极和所述电阻R9的另一端连接。In a further embodiment, the source of the MOS transistor Q1 is simultaneously connected to the source of the MOS transistor Q4 and the drain of the MOS transistor Q3, and the source of the MOS transistor Q2 is simultaneously connected to the MOS transistor The source of Q5 is connected to the drain of the MOS transistor Q3, the gate of the MOS transistor Q3 is connected to the gate of the MOS transistor Q6, the gate of the MOS transistor Q4 is connected to the gate of the MOS transistor Q5 connected to the source of the MOS transistor Q3, the gate of the MOS transistor Q4 is connected to the gate of the MOS transistor Q5 and connected to the source of the MOS transistor Q3, the operational amplifier U3A Pin No. 3 is connected to the source of the MOS tube Q6, pin No. 2 of the operational amplifier U3A is connected to one end of the resistor R9, and pin No. 11 of the operational amplifier U3A is connected to the MOS tube at the same time. The drain of Q5 is connected to the drain of the MOS transistor Q8, the drain of the MOS transistor Q4 is connected to the drain of the MOS transistor Q5, and the drain of the MOS transistor Q9 is simultaneously connected to the drain of the MOS transistor Q8. The drain is connected to the drain of the MOS transistor Q10, and the No. 1 pin of the operational amplifier U3A is connected to the source of the MOS transistor Q8 and the source of the MOS transistor Q7 at the same time. The gate is connected to the source of the MOS transistor Q9 and the input terminal of the transformer TR1, the gate of the MOS transistor Q7 is connected to the source of the MOS transistor Q10 and is connected to the input terminal of the transformer TR1 connected, the No. 4 pin of the operational amplifier U3A is connected to the drain of the MOS transistor Q7 and the other end of the resistor R9 and grounded at the same time, and the source of the MOS transistor Q9 is simultaneously connected to the MOS transistor Q7. The drain is connected to the source of the MOS transistor Q10, and the source of the MOS transistor Q3 is simultaneously connected to the drain of the MOS transistor Q1, the drain of the MOS transistor Q2 and the other end of the resistor R9.
在进一步的实施例中，所述三极管Q13的集电极同时与所述二极管D2的正极、所述电容C5的一端、所述电容C6的一端、所述电阻R16的一端和所述可调电阻RV2的一端连接，所述三极管Q12的发射极同时与所述电阻R10的一端和所述三极管Q13的基极连接，所述三极管Q13的发射极同时与所述电阻R10的另一端和所述电容C6的另一端连接，所述三极管Q11的集电极同时与所述三极管Q12的基极和所述电阻R11的一端连接，所述三极管Q11的基极同时与所述二极管D1的负极和所述电阻R12的一端连接，所述电阻R16的另一端与所述差模电感L1的一端连接，所述二极管D1的正极同时与所述可调电阻RV1的一端和所述电阻R13的一端连接，所述三极管Q11的发射极同时与所述可调电阻RV2的控制端连接，所述可调电阻RV2的另一端和所述电阻R15的一端连接，所述三极管Q12的集电极与所述电阻R14的一端连接，所述电阻R14的另一端同时与所述电阻R13的另一端和所述电阻R15的另一端连接，所述电阻R13的另一端与所述肖特基二极管D3的负极连接，所述可调电阻RV1的控制端与所述肖特基二极管D3的正极连接，所述电容C5的另一端同时与所述二极管D2的负极和所述电阻R15的另一端连接，所述差模电感L1的路另一端与所述二极管D2的负极连接。In a further embodiment, the collector of the transistor Q13 is simultaneously connected to the anode of the diode D2, one end of the capacitor C5, one end of the capacitor C6, one end of the resistor R16 and the adjustable resistor RV2 one end of the transistor Q12 is connected to one end of the resistor R10 and the base of the transistor Q13, the emitter of the transistor Q13 is simultaneously connected to the other end of the resistor R10 and the capacitor C6 The other end of the transistor Q11 is connected to the base of the transistor Q12 and one end of the resistor R11 at the same time, the base of the transistor Q11 is connected to the cathode of the diode D1 and the resistor R12 at the same time one end of the resistor R16 is connected to one end of the differential mode inductor L1, the anode of the diode D1 is connected to one end of the adjustable resistor RV1 and one end of the resistor R13 at the same time, the triode The emitter of Q11 is simultaneously connected to the control terminal of the adjustable resistor RV2, the other end of the adjustable resistor RV2 is connected to one end of the resistor R15, and the collector of the transistor Q12 is connected to one end of the resistor R14 , the other end of the resistor R14 is connected to the other end of the resistor R13 and the other end of the resistor R15 at the same time, the other end of the resistor R13 is connected to the negative electrode of the Schottky diode D3, the adjustable The control end of the resistor RV1 is connected to the anode of the Schottky diode D3, the other end of the capacitor C5 is connected to the cathode of the diode D2 and the other end of the resistor R15 at the same time, and the path of the differential mode inductor L1 The other end is connected to the cathode of the diode D2.
在进一步的实施例中，所述运算放大器U2A的3号引脚同时与所述电阻R1的一端和所述电阻R8的一端连接，所述运算放大器U2A的2号引脚与所述电阻R4的一端连接，所述运算放大器U2A的1号引脚同时与所述电阻R1的另一端和所述电阻R2的一端连接，所述运算放大器U2B的5号引脚同时与所述电容C3的一端和所述电阻R2的另一端连接，所述运算放大器U2B的6号引脚与所述电阻R5的一端连接，所述电阻R5的另一端接地，所述运算放大器U2B的7号引脚同时与所述电容C3的另一端、所述电阻R6的一端和所述电阻R4的另一端连接，所述运算放大器U2C的10号引脚同时与所述电阻R6的另一端和所述电容C4的一端连接，所述运算放大器U2C的9号引脚与所述电阻R7的一端连接，所述运算放大器U2C的8号引脚同时与所述电容C4的另一端和所述电阻R8的另一端连接且输出，所述电阻R7的另一端接地。In a further embodiment, the No. 3 pin of the operational amplifier U2A is connected to one end of the resistor R1 and the one end of the resistor R8 at the same time, and the No. 2 pin of the operational amplifier U2A is connected to the resistor R4. One end is connected, the No. 1 pin of the operational amplifier U2A is connected to the other end of the resistor R1 and one end of the resistor R2 at the same time, the No. 5 pin of the operational amplifier U2B is simultaneously connected to one end of the capacitor C3 and one end of the resistor R2. The other end of the resistor R2 is connected, the No. 6 pin of the operational amplifier U2B is connected to one end of the resistor R5, the other end of the resistor R5 is grounded, and the No. 7 pin of the operational amplifier U2B is simultaneously connected to the other end of the resistor R5. The other end of the capacitor C3, one end of the resistor R6 and the other end of the resistor R4 are connected, and the No. 10 pin of the operational amplifier U2C is connected to the other end of the resistor R6 and the other end of the capacitor C4 at the same time. , the No. 9 pin of the operational amplifier U2C is connected to one end of the resistor R7, and the No. 8 pin of the operational amplifier U2C is simultaneously connected to the other end of the capacitor C4 and the other end of the resistor R8 and outputs , the other end of the resistor R7 is grounded.
在进一步的实施例中，MOS管Q1的栅极与电容C2的另一端连接，MOS管Q2的栅极与电阻R3的另一端连接，电容C6的另一端与变压器TR1的输出端连接，差模电感L1的另一端与变压器TR1的输出端连接，运算放大器U2A的3号引脚与肖特基二极管D3的正极连接，运算放大器U2A的2号引脚与肖特基二极管D3的负极连接。In a further embodiment, the gate of the MOS transistor Q1 is connected to the other end of the capacitor C2, the gate of the MOS transistor Q2 is connected to the other end of the resistor R3, the other end of the capacitor C6 is connected to the output end of the transformer TR1, and the differential mode The other end of the inductor L1 is connected to the output end of the transformer TR1, the No. 3 pin of the operational amplifier U2A is connected to the positive pole of the Schottky diode D3, and the No. 2 pin of the operational amplifier U2A is connected to the negative pole of the Schottky diode D3.
工作原理：当需要进行音视频供电时，电源电压通过熔断器FU1进入整流桥BR1，熔断器FU1进行输入电压保护，通过整流桥BR1进行电压整流，从而输出电压通过电容C1进行滤波输入稳压器 U1，稳压器U1进行电压稳定同岁通过稳压器U1的2号引脚输入值电容C2进行滤波输出，电阻R3进行保护输出；Working principle: When audio and video power supply is required, the power supply voltage enters the rectifier bridge BR1 through the fuse FU1, the fuse FU1 protects the input voltage, and the rectifier bridge BR1 performs voltage rectification, so that the output voltage is filtered through the capacitor C1. The input voltage regulator U1, the voltage stabilizer U1 performs voltage stabilization through the input value capacitor C2 of the No. 2 pin of the voltage stabilizer U1 to filter the output, and the resistor R3 protects the output;
电压信号输入至速率增强单元，此时将输出MOS管Q1和MOS管Q2的电流记作I1，输出MOS管Q3的电流记住I2，输出MOS管Q7的电流记作I3，流入MOS管Q8的电流记作I6，输出MOS管Q8和MOS管Q9的电流记住I4，输出MOS管Q10的电流记作I5；正常工作时，此时流入MOS管Q9的电流大于I4，而I5大于流入MOS管Q10的电流，从而MOS管Q8输出的电压为高电平，MOS管Q7的输出电压为低电平，从而MOS管Q8和MOS管Q7不导通，当在MOS管Q1输入一个正信号时，此时MOS管Q2截止，从而I1全部流入MOS管Q1，从而流入MOS管Q4的电流瞬间变小，相应的镜像管MOS管Q9和MOS管Q10上的电流也变得很小，从而此时I4大于流入MOS管Q9的电流，I5大于流入MOS管Q10的电流，从而MOS管Q8输出的电压从高电平转向低电平，MOS管Q7的输出电压为低电平，从而MOS管Q8导通，从而I6给运算放大器U3A输出端提供电流，从而加速了正向转换速率；同样当在MOS管Q2输入一个负信号时，MOS管Q1截止，从而I1全部流入MOS管Q2，从而流入MOS管Q4的电流瞬间变大，相应的镜像管MOS管Q9和MOS管Q10上的电流也变得很大，从而此时I4小于流入MOS管Q9的电流，I5小于流入MOS管Q10的电流，从而MOS管Q8输出的电压为高电平转，MOS管Q7的输出电压从低电平转向高电平，从而MOS管Q7导通，从而I3给运算放大器U3A输出端提供电流，从而加速了反向转换速率； The voltage signal is input to the rate enhancement unit. At this time, the current of the output MOS transistor Q1 and MOS transistor Q2 is recorded as I1, the current of the output MOS transistor Q3 is recorded as I2, the current of the output MOS transistor Q7 is recorded as I3, and the current flowing into the MOS transistor Q8 is recorded as I3. The current is recorded as I6, the current of the output MOS transistor Q8 and MOS transistor Q9 is remembered as I4, and the current of the output MOS transistor Q10 is recorded as I5; during normal operation, the current flowing into the MOS transistor Q9 is greater than I4, and I5 is greater than that flowing into the MOS transistor. The current of Q10, so the output voltage of MOS transistor Q8 is high level, and the output voltage of MOS transistor Q7 is low level, so MOS transistor Q8 and MOS transistor Q7 are not conducting, when a positive signal is input to MOS transistor Q1, At this time, the MOS transistor Q2 is turned off, so that all I1 flows into the MOS transistor Q1, so that the current flowing into the MOS transistor Q4 becomes smaller instantly, and the currents on the corresponding mirror transistors MOS transistor Q9 and MOS transistor Q10 also become very small, so at this time I4 It is greater than the current flowing into the MOS transistor Q9, and I5 is greater than the current flowing into the MOS transistor Q10, so that the output voltage of the MOS transistor Q8 changes from a high level to a low level, and the output voltage of the MOS transistor Q7 is a low level, so that the MOS transistor Q8 is turned on. , so that I6 provides current to the output terminal of the operational amplifier U3A, thereby accelerating the forward slew rate; also when a negative signal is input to the MOS transistor Q2, the MOS transistor Q1 is turned off, so that all I1 flows into the MOS transistor Q2, thus flowing into the MOS transistor Q4 The current of the corresponding mirror tube MOS tube Q9 and MOS tube Q10 also becomes very large, so at this time I4 is less than the current flowing into the MOS tube Q9, and I5 is less than the current flowing into the MOS tube Q10, so the MOS tube The voltage output by Q8 turns to a high level, and the output voltage of the MOS transistor Q7 changes from a low level to a high level, so that the MOS transistor Q7 is turned on, so that I3 provides current to the output terminal of the operational amplifier U3A, thereby accelerating the reverse conversion rate. ;
电压经过变压器TR1转换为直流电压，通过输入电压调节单元进行电压大小控制，此时电压通过电容C6的一端和差模电感L1的一端输入，此时三极管Q13因为得电，从而三极管Q13配合二极管D2组成开关电路，电容C5配合可调电阻RV2和电阻R5组成解调电路，通过改变电阻R5的阻值，从而三极管Q13的基极进行导通，从而三极管Q12进行得电从而输出，当电压符合工作范围时，则通过三极管Q12的基极进行输出值三极管Q11，此时电阻R11与电阻R12进行保护，三极管Q11的基极进行输出，同岁可调电阻RV1与电阻R3、肖特基二极管D3组成比较输出电路，从而进行输出电压至率输出电路；电压信号通过运算放大器U2A进行取高通信号，从而经过运算放大器U2B进行取低通信号，从而运算放大器U2C进行滤波输出。The voltage is converted into DC voltage through the transformer TR1, and the voltage is controlled by the input voltage adjustment unit. At this time, the voltage is input through one end of the capacitor C6 and one end of the differential mode inductor L1. At this time, the transistor Q13 is energized, so the transistor Q13 cooperates with the diode D2. A switch circuit is formed. The capacitor C5 cooperates with the adjustable resistor RV2 and the resistor R5 to form a demodulation circuit. By changing the resistance value of the resistor R5, the base of the transistor Q13 is turned on, so that the transistor Q12 is energized and output. When the voltage meets the working conditions In the range, the output value of the transistor Q11 is carried out through the base of the transistor Q12. At this time, the resistor R11 and the resistor R12 are protected, the base of the transistor Q11 is output, and the adjustable resistor RV1 is composed of the resistor R3 and the Schottky diode D3. The output circuit is compared to output the voltage-to-rate output circuit; the voltage signal takes the high-pass signal through the operational amplifier U2A, and then takes the low-pass signal through the operational amplifier U2B, so that the operational amplifier U2C filters the output.
另外需要说明的是，在上述具体实施方式中所描述的各个具体技术特征，在不矛盾的情况下，可以通过任何合适的方式进行组合。为了避免不必要的重复，本发明对各种可能的组合方式不再另行说明。In addition, it should be noted that each specific technical feature described in the above-mentioned specific implementation manner may be combined in any suitable manner under the circumstance that there is no contradiction. In order to avoid unnecessary repetition, the present invention will not describe various possible combinations.

Claims (10)

  1. 一种物联网监控系统的降噪系统，其特征在于，包括：A noise reduction system for an Internet of Things monitoring system, characterized in that it includes:
    用于进行音视频监控系统供电，同时进行电源电稳压滤波的稳压滤波单元；It is a voltage-stabilizing filter unit used for power supply of audio and video monitoring system and voltage-stabilizing and filtering of power supply voltage at the same time;
    用于进行输入电源电压转换，同时进行防止输入电压瞬变的速率增强单元；A rate enhancement unit for input supply voltage conversion while simultaneously preventing input voltage transients;
    用于进行输入电压调节的电压调节单元；A voltage regulation unit for input voltage regulation;
    用于进行电压输出滤波，同时防止输出电压瞬变的滤波输出单元。Filtered output unit for voltage output filtering while preventing output voltage transients.
  2. 根据权利要求1所述的一种物联网监控系统的降噪系统，其特征在于，所述稳压滤波单元包括：熔断器FU1、整流桥BR1、电容C1、稳压器U1、电容C2、电阻R3；其中，所述熔断器FU1的一端输入电压，所述整流桥BR1的输入端与所述熔断器FU1的另一端连接且输入电压，所述整流桥BR1的输出端与所述电容C1的两端连接，所述稳压器U1的1号引脚与所述电容C1的一端连接，所述稳压器U1的2号引脚同时与所述电容C1的另一端、所述电容C2的一端和所述电阻R3的一端连接且接地，所述稳压器U1的3号引脚与所述电容C2的另一端连接。 The noise reduction system of an Internet of Things monitoring system according to claim 1, wherein the voltage regulator filter unit comprises: a fuse FU1, a rectifier bridge BR1, a capacitor C1, a voltage regulator U1, a capacitor C2, a resistor R3; wherein, one end of the fuse FU1 inputs a voltage, the input end of the rectifier bridge BR1 is connected to the other end of the fuse FU1 and inputs voltage, and the output end of the rectifier bridge BR1 is connected to the capacitor C1. The two ends are connected, the No. 1 pin of the voltage stabilizer U1 is connected to one end of the capacitor C1, and the No. 2 pin of the voltage stabilizer U1 is simultaneously connected to the other end of the capacitor C1 and the capacitor C2. One end is connected to one end of the resistor R3 and is grounded, and the No. 3 pin of the voltage regulator U1 is connected to the other end of the capacitor C2.
  3. 根据权利要求1所述的一种物联网监控系统的降噪系统，其特征在于，所述速率增强单元包括：MOS管Q1、MOS管Q2、MOS管Q3、MOS管Q4、MOS管Q5、MOS管Q6、MOS管Q7、MOS管Q8、MOS管Q9、MOS管Q10、运算放大器U3A、电阻R9、变压器TR1；其中，所述MOS管Q1的源极同时与所述MOS管Q4的源极和所述MOS管Q3的漏极连接，所述MOS管Q2的源极同时与所述MOS管Q5的源极和所述MOS管Q3的漏极连接，所述MOS管Q3的栅极和所述MOS管Q6的栅极连接，所述MOS管Q4的栅极和所述MOS管Q5的栅极连接且与所述MOS管Q3的源极连接，所述MOS管Q4的栅极和所述MOS管Q5的栅极连接且与所述MOS管Q3的源极连接，所述运算放大器U3A的3号引脚与所述MOS管Q6的源极连接，所述运算放大器U3A的2号引脚与所述电阻R9的一端连接，所述运算放大器U3A的11号引脚同时与所述MOS管Q5的漏极和所述MOS管Q8的漏极连接，所述MOS管Q4的漏极与所述MOS管Q5的漏极连接，所述MOS管Q9的漏极同时与所述MOS管Q8的漏极和所述MOS管Q10的漏极连接，所述运算放大器U3A的1号引脚同时与所述MOS管Q8的源极和所述MOS管Q7的源极连接，所述MOS管Q8的栅极与所述MOS管Q9的源极连接且与所述变压器TR1的输入端连接，所述MOS管Q7的栅极与所述MOS管Q10的源极连接且与所述变压器TR1的输入端连接，所述运算放大器U3A的4号引脚同时与所述MOS管Q7的漏极和所述电阻R9的另一端连接且接地，所述MOS管Q9的源极同时与所述MOS管Q7的漏极和所述MOS管Q10的源极连接，所述MOS管Q3的源极同时与所述MOS管Q1的漏极、所述MOS管Q2的漏极和所述电阻R9的另一端连接。 The noise reduction system of the Internet of Things monitoring system according to claim 1, wherein the rate enhancement unit comprises: a MOS transistor Q1, a MOS transistor Q2, a MOS transistor Q3, a MOS transistor Q4, a MOS transistor Q5, a MOS transistor tube Q6, MOS tube Q7, MOS tube Q8, MOS tube Q9, MOS tube Q10, operational amplifier U3A, resistor R9, and transformer TR1; wherein, the source of the MOS tube Q1 and the source of the MOS tube Q4 and the The drain of the MOS transistor Q3 is connected, the source of the MOS transistor Q2 is connected to the source of the MOS transistor Q5 and the drain of the MOS transistor Q3 at the same time, and the gate of the MOS transistor Q3 is connected to the drain of the MOS transistor Q3. The gate of the MOS transistor Q6 is connected, the gate of the MOS transistor Q4 is connected to the gate of the MOS transistor Q5 and is connected to the source of the MOS transistor Q3, and the gate of the MOS transistor Q4 is connected to the MOS transistor Q4. The gate of the tube Q5 is connected to the source of the MOS tube Q3, the No. 3 pin of the operational amplifier U3A is connected to the source of the MOS tube Q6, and the No. 2 pin of the operational amplifier U3A is connected to the source of the MOS tube Q6. One end of the resistor R9 is connected, the No. 11 pin of the operational amplifier U3A is connected to the drain of the MOS transistor Q5 and the drain of the MOS transistor Q8 at the same time, and the drain of the MOS transistor Q4 is connected to the drain of the MOS transistor Q4. The drain of the MOS transistor Q5 is connected, the drain of the MOS transistor Q9 is connected to the drain of the MOS transistor Q8 and the drain of the MOS transistor Q10 at the same time, and the No. 1 pin of the operational amplifier U3A is simultaneously connected to the drain of the MOS transistor Q8. The source of the MOS transistor Q8 is connected to the source of the MOS transistor Q7, the gate of the MOS transistor Q8 is connected to the source of the MOS transistor Q9 and is connected to the input end of the transformer TR1, the MOS transistor The gate of the transistor Q7 is connected to the source of the MOS transistor Q10 and to the input end of the transformer TR1, and the No. 4 pin of the operational amplifier U3A is connected to the drain of the MOS transistor Q7 and the resistor at the same time. The other end of R9 is connected and grounded, the source of the MOS transistor Q9 is connected to the drain of the MOS transistor Q7 and the source of the MOS transistor Q10 at the same time, and the source of the MOS transistor Q3 is simultaneously connected to the MOS transistor Q10. The drain of the transistor Q1, the drain of the MOS transistor Q2 and the other end of the resistor R9 are connected.
  4. 根据权利要求1所述的一种物联网监控系统的降噪系统，其特征在于，所述电压调节单元包括：电容C6、电阻R16、差模电感L1、三极管Q13、二极管D2、电容C5、电阻R10、电阻R11、三极管Q12、三极管Q11、电阻R12、二极管D1、可调电阻RV1、可调电阻RV2、电阻R13、电阻R14、电阻R15、肖特基二极管D3；其中，所述三极管Q13的集电极同时与所述二极管D2的正极、所述电容C5的一端、所述电容C6的一端、所述电阻R16的一端和所述可调电阻RV2的一端连接，所述三极管Q12的发射极同时与所述电阻R10的一端和所述三极管Q13的基极连接，所述三极管Q13的发射极同时与所述电阻R10的另一端和所述电容C6的另一端连接，所述三极管Q11的集电极同时与所述三极管Q12的基极和所述电阻R11的一端连接，所述三极管Q11的基极同时与所述二极管D1的负极和所述电阻R12的一端连接，所述电阻R16的另一端与所述差模电感L1的一端连接，所述二极管D1的正极同时与所述可调电阻RV1的一端和所述电阻R13的一端连接，所述三极管Q11的发射极同时与所述可调电阻RV2的控制端连接，所述可调电阻RV2的另一端和所述电阻R15的一端连接，所述三极管Q12的集电极与所述电阻R14的一端连接，所述电阻R14的另一端同时与所述电阻R13的另一端和所述电阻R15的另一端连接，所述电阻R13的另一端与所述肖特基二极管D3的负极连接，所述可调电阻RV1的控制端与所述肖特基二极管D3的正极连接，所述电容C5的另一端同时与所述二极管D2的负极和所述电阻R15的另一端连接，所述差模电感L1的路另一端与所述二极管D2的负极连接。 The noise reduction system of the Internet of Things monitoring system according to claim 1, wherein the voltage adjustment unit comprises: a capacitor C6, a resistor R16, a differential mode inductor L1, a transistor Q13, a diode D2, a capacitor C5, a resistor R10, resistor R11, transistor Q12, transistor Q11, resistor R12, diode D1, adjustable resistor RV1, adjustable resistor RV2, resistor R13, resistor R14, resistor R15, Schottky diode D3; wherein, the collector of the transistor Q13 The electrode is simultaneously connected to the anode of the diode D2, one end of the capacitor C5, one end of the capacitor C6, one end of the resistor R16 and one end of the adjustable resistor RV2, and the emitter of the transistor Q12 is simultaneously connected to the One end of the resistor R10 is connected to the base of the transistor Q13, the emitter of the transistor Q13 is connected to the other end of the resistor R10 and the other end of the capacitor C6 at the same time, and the collector of the transistor Q11 is simultaneously connected. It is connected to the base of the transistor Q12 and one end of the resistor R11, the base of the transistor Q11 is connected to the cathode of the diode D1 and one end of the resistor R12 at the same time, and the other end of the resistor R16 is connected to the One end of the differential mode inductor L1 is connected, the anode of the diode D1 is connected to one end of the adjustable resistor RV1 and one end of the resistor R13 at the same time, and the emitter of the transistor Q11 is connected to the adjustable resistor RV2 at the same time. The control end is connected, the other end of the adjustable resistor RV2 is connected to one end of the resistor R15, the collector of the transistor Q12 is connected to one end of the resistor R14, and the other end of the resistor R14 is connected to the resistor at the same time. The other end of R13 is connected to the other end of the resistor R15, the other end of the resistor R13 is connected to the negative electrode of the Schottky diode D3, and the control end of the adjustable resistor RV1 is connected to the Schottky diode D3 The other end of the capacitor C5 is connected to the cathode of the diode D2 and the other end of the resistor R15 at the same time, and the other end of the differential mode inductor L1 is connected to the cathode of the diode D2.
  5. 根据权利要求1所述的一种物联网监控系统的降噪系统，其特征在于，所述滤波输出单元包括：运算放大器U2A、运算放大器U2B、运算放大器U2C、电阻R1、电阻R2、电阻R5、电阻R8、电阻R4、电阻R6、电阻R7、电容C3、电容C4；其中，所述运算放大器U2A的3号引脚同时与所述电阻R1的一端和所述电阻R8的一端连接，所述运算放大器U2A的2号引脚与所述电阻R4的一端连接，所述运算放大器U2A的1号引脚同时与所述电阻R1的另一端和所述电阻R2的一端连接，所述运算放大器U2B的5号引脚同时与所述电容C3的一端和所述电阻R2的另一端连接，所述运算放大器U2B的6号引脚与所述电阻R5的一端连接，所述电阻R5的另一端接地，所述运算放大器U2B的7号引脚同时与所述电容C3的另一端、所述电阻R6的一端和所述电阻R4的另一端连接，所述运算放大器U2C的10号引脚同时与所述电阻R6的另一端和所述电容C4的一端连接，所述运算放大器U2C的9号引脚与所述电阻R7的一端连接，所述运算放大器U2C的8号引脚同时与所述电容C4的另一端和所述电阻R8的另一端连接且输出，所述电阻R7的另一端接地。 The noise reduction system of an Internet of Things monitoring system according to claim 1, wherein the filter output unit comprises: an operational amplifier U2A, an operational amplifier U2B, an operational amplifier U2C, a resistor R1, a resistor R2, a resistor R5, Resistor R8, resistor R4, resistor R6, resistor R7, capacitor C3, capacitor C4; wherein, the No. 3 pin of the operational amplifier U2A is connected to one end of the resistor R1 and one end of the resistor R8 at the same time, and the operation The No. 2 pin of the amplifier U2A is connected to one end of the resistor R4, the No. 1 pin of the operational amplifier U2A is connected to the other end of the resistor R1 and one end of the resistor R2 at the same time, and the Pin No. 5 is connected to one end of the capacitor C3 and the other end of the resistor R2 at the same time, and the No. 6 pin of the operational amplifier U2B is connected to one end of the resistor R5, and the other end of the resistor R5 is grounded, Pin No. 7 of the operational amplifier U2B is simultaneously connected to the other end of the capacitor C3, one end of the resistor R6 and the other end of the resistor R4, and the pin No. 10 of the operational amplifier U2C is simultaneously connected to the The other end of the resistor R6 is connected to one end of the capacitor C4, the No. 9 pin of the operational amplifier U2C is connected to one end of the resistor R7, and the No. 8 pin of the operational amplifier U2C is connected to the capacitor C4 at the same time. The other end is connected to the other end of the resistor R8 and output, and the other end of the resistor R7 is grounded.
  6. 根据权利要求1所述的一种物联网监控系统的降噪系统，其特征在于，MOS管Q1的栅极与电容C2的另一端连接，MOS管Q2的栅极与电阻R3的另一端连接，电容C6的另一端与变压器TR1的输出端连接，差模电感L1的另一端与变压器TR1的输出端连接，运算放大器U2A的3号引脚与肖特基二极管D3的正极连接，运算放大器U2A的2号引脚与肖特基二极管D3的负极连接。 The noise reduction system of an Internet of Things monitoring system according to claim 1, wherein the gate of the MOS transistor Q1 is connected to the other end of the capacitor C2, and the gate of the MOS transistor Q2 is connected to the other end of the resistor R3, The other end of the capacitor C6 is connected to the output end of the transformer TR1, the other end of the differential mode inductor L1 is connected to the output end of the transformer TR1, the No. 3 pin of the operational amplifier U2A is connected to the positive electrode of the Schottky diode D3, and the Pin 2 is connected to the negative terminal of Schottky diode D3.
  7. 一种权利要求2至6任一项所述的物联网监控系统的降噪系统的降噪方法，其特征在于，包括以下步骤： A noise reduction method for the noise reduction system of the Internet of Things monitoring system according to any one of claims 2 to 6, characterized in that, comprising the following steps:
    步骤1、当音视频监控系统进行工作时，通过稳压滤波单元进行电源电压的整流、稳压工作；Step 1. When the audio and video monitoring system is working, the rectification and voltage stabilization of the power supply voltage are performed by the voltage stabilization filter unit;
    步骤2、其次电压通过输入速率增强单元进行电压转换效率的增强，其中电压信号通过一次放大电路、二次放大电路进行放大，从而输入增强电路进行转换速率的提升，从而经过变压器进行电压转换Step 2. Secondly, the voltage is enhanced by the input rate enhancement unit to enhance the voltage conversion efficiency, wherein the voltage signal is amplified by the primary amplifier circuit and the secondary amplifier circuit, so as to input the enhancement circuit to enhance the conversion rate, so as to convert the voltage through the transformer
    步骤3、转换输出的直流电压通过输入电压调节单元，进行电压的实时调节，从而可以有效的稳定工作电压，从而使之输出符合工作需要且稳定的电压，从而防止电压偏移；Step 3. The converted output DC voltage is adjusted in real time through the input voltage adjustment unit, so that the working voltage can be effectively stabilized, so that the output voltage meets the working needs and is stable, thereby preventing voltage offset;
    步骤4、输出电压通过由放大器组成的低通滤波单元进行滤除高频信号，从而减小噪音产生，提升信号的信噪比。Step 4. The output voltage is filtered by a low-pass filter unit composed of an amplifier to filter out high-frequency signals, thereby reducing noise generation and improving the signal-to-noise ratio of the signal.
  8. 根据权利要求7所述的一种物联网监控系统的降噪系统的降噪方法，其特征在于，根据步骤3可以进一步得出： The noise reduction method of a noise reduction system of an Internet of Things monitoring system according to claim 7, wherein, according to step 3, it can be further obtained:
    步骤5、当音视频监控系统中音视频元件进行工作时，由于变化的电源电压转换速率慢的缘故，电压信号会出现反跳，从而产生噪声，此时电压信号通过MOS管Q1和MOS管Q2输入电路，其中MOS管Q1、MOS管Q2、MOS管Q3、MOS管Q4、MOS管Q5、MOS管Q6组成一次放大电路，从而进行信号的一次放大翻转，且运算放大器U3A配合电阻R9组成二次放大电路，且MOS管Q7、MOS管Q8、MOS管Q9、MOS管Q10组成增强电路，从而提升转换速率。Step 5. When the audio and video components in the audio and video monitoring system are working, due to the slow conversion rate of the changing power supply voltage, the voltage signal will bounce back, resulting in noise. At this time, the voltage signal passes through the MOS transistor Q1 and the MOS transistor Q2. The input circuit, in which MOS transistor Q1, MOS transistor Q2, MOS transistor Q3, MOS transistor Q4, MOS transistor Q5, and MOS transistor Q6 form a primary amplifier circuit, so as to perform a primary amplification and reversal of the signal, and the operational amplifier U3A cooperates with the resistor R9 to form a secondary Amplifying circuit, and MOS transistor Q7, MOS transistor Q8, MOS transistor Q9, and MOS transistor Q10 form an enhanced circuit, thereby increasing the conversion rate.
  9. 根据权利要求8所述的一种物联网监控系统的降噪系统的降噪方法，其特征在于，根据步骤5可以进一步得出： The noise reduction method of a noise reduction system of an Internet of Things monitoring system according to claim 8, wherein, according to step 5, it can be further obtained:
    步骤6、此时将输出MOS管Q1和MOS管Q2的电流记作I1，输出MOS管Q3的电流记住I2，输出MOS管Q7的电流记作I3，流入MOS管Q8的电流记作I6，输出MOS管Q8和MOS管Q9的电流记住I4，输出MOS管Q10的电流记作I5；正常工作时，此时流入MOS管Q9的电流大于I4，而I5大于流入MOS管Q10的电流，从而MOS管Q8输出的电压为高电平，MOS管Q7的输出电压为低电平，从而MOS管Q8和MOS管Q7不导通，当在MOS管Q1输入一个正信号时，此时MOS管Q2截止，从而I1全部流入MOS管Q1，从而流入MOS管Q4的电流瞬间变小，相应的镜像管MOS管Q9和MOS管Q10上的电流也变得很小，从而此时I4大于流入MOS管Q9的电流，I5大于流入MOS管Q10的电流，从而MOS管Q8输出的电压从高电平转向低电平，MOS管Q7的输出电压为低电平，从而MOS管Q8导通，从而I6给运算放大器U3A输出端提供电流，从而加速了正向转换速率；Step 6. At this time, the current of the output MOS transistor Q1 and MOS transistor Q2 is recorded as I1, the current of the output MOS transistor Q3 is recorded as I2, the current of the output MOS transistor Q7 is recorded as I3, the current flowing into the MOS transistor Q8 is recorded as I6, The current of the output MOS transistor Q8 and MOS transistor Q9 is remembered as I4, and the current of the output MOS transistor Q10 is recorded as I5; during normal operation, the current flowing into the MOS transistor Q9 is greater than I4, and I5 is greater than the current flowing into the MOS transistor Q10, thus The output voltage of MOS transistor Q8 is high level, and the output voltage of MOS transistor Q7 is low level, so that MOS transistor Q8 and MOS transistor Q7 are not conducting. When a positive signal is input to MOS transistor Q1, MOS transistor Q2 is at this time. Cut off, so that all I1 flows into the MOS transistor Q1, so that the current flowing into the MOS transistor Q4 becomes smaller instantly, and the currents on the corresponding mirror transistors MOS transistor Q9 and MOS transistor Q10 also become very small, so at this time I4 is greater than the inflow MOS transistor Q9. The current of I5 is greater than the current flowing into the MOS transistor Q10, so the voltage output by the MOS transistor Q8 changes from a high level to a low level, and the output voltage of the MOS transistor Q7 is a low level, so that the MOS transistor Q8 is turned on, so that I6 gives the operation The output of amplifier U3A provides current, which accelerates the forward slew rate;
    同样当在MOS管Q2输入一个负信号时，MOS管Q1截止，从而I1全部流入MOS管Q2，从而流入MOS管Q4的电流瞬间变大，相应的镜像管MOS管Q9和MOS管Q10上的电流也变得很大，从而此时I4小于流入MOS管Q9的电流，I5小于流入MOS管Q10的电流，从而MOS管Q8输出的电压为高电平转，MOS管Q7的输出电压从低电平转向高电平，从而MOS管Q7导通，从而I3给运算放大器U3A输出端提供电流，从而加速了反向转换速率。Similarly, when a negative signal is input to the MOS transistor Q2, the MOS transistor Q1 is turned off, so that all I1 flows into the MOS transistor Q2, so that the current flowing into the MOS transistor Q4 increases instantaneously, and the corresponding mirror transistors MOS transistor Q9 and MOS transistor Q10 currents on It also becomes very large, so that at this time I4 is less than the current flowing into the MOS transistor Q9, and I5 is less than the current flowing into the MOS transistor Q10, so the voltage output by the MOS transistor Q8 turns to a high level, and the output voltage of the MOS transistor Q7 changes from a low level. Turning to a high level, the MOS transistor Q7 is turned on, so that I3 provides current to the output terminal of the operational amplifier U3A, thereby accelerating the reverse slew rate.
  10. 根据权利要求7所述的一种物联网监控系统的降噪系统的降噪方法，其特征在于，根据步骤4可以进一步得出：当电压信号通过输入滤波输出单元，通过运算放大器U2A进行取高通信号，从而经过运算放大器U2B进行取低通信号，从而运算放大器U2C进行滤波输出。 A noise reduction method for a noise reduction system of an Internet of Things monitoring system according to claim 7, characterized in that, according to step 4, it can be further obtained: when the voltage signal passes through the input filter output unit, the operational amplifier U2A is used to take a high value The low-pass signal is obtained through the operational amplifier U2B, so that the operational amplifier U2C filters the output.
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