CN111510501B - Frequency-adjustable Internet of things terminal - Google Patents

Frequency-adjustable Internet of things terminal Download PDF

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Publication number
CN111510501B
CN111510501B CN202010333661.1A CN202010333661A CN111510501B CN 111510501 B CN111510501 B CN 111510501B CN 202010333661 A CN202010333661 A CN 202010333661A CN 111510501 B CN111510501 B CN 111510501B
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China
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resistor
capacitor
triode
signal
frequency
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CN111510501A (en
Inventor
吴晨光
陆继钊
李文萃
党芳芳
郭少勇
李雄
崔鹏
蔡沛霖
李永杰
孟慧平
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State Grid Corp of China SGCC
Beijing University of Posts and Telecommunications
Information and Telecommunication Branch of State Grid Henan Electric Power Co Ltd
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State Grid Corp of China SGCC
Beijing University of Posts and Telecommunications
Information and Telecommunication Branch of State Grid Henan Electric Power Co Ltd
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Publication of CN111510501A publication Critical patent/CN111510501A/en
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L67/00—Network arrangements or protocols for supporting network services or applications
    • H04L67/01—Protocols
    • H04L67/12—Protocols specially adapted for proprietary or special-purpose networking environments, e.g. medical networks, sensor networks, networks in vehicles or remote metering networks
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/06—Receivers
    • H04B1/16—Circuits
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/10—Frequency-modulated carrier systems, i.e. using frequency-shift keying
    • 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
    • Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
    • Y02D30/00—Reducing energy consumption in communication networks
    • Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Health & Medical Sciences (AREA)
  • Computing Systems (AREA)
  • General Health & Medical Sciences (AREA)
  • Medical Informatics (AREA)
  • Amplifiers (AREA)
  • Telephonic Communication Services (AREA)

Abstract

The invention discloses a frequency-adjustable Internet of things terminal, which comprises a signal receiving module and a frequency modulation buffer module, wherein the signal receiving module receives an output signal of a signal receiver in the frequency-adjustable Internet of things terminal, the signal receiving module is connected with an input port of the frequency modulation buffer module through an operational amplifier AR1, the frequency modulation buffer module filters a high-frequency signal component by using an inductor L4, filters a low-frequency signal component by using a capacitor C1 and a capacitor C2, and simultaneously a triode Q1 plays a role in amplifying a signal current, meanwhile, in order to replace a reference signal in the prior art with a source signal for frequency modulation, a resistor R3 is used for voltage division, then a triode Q3 and a capacitor C4 are used for forming a delay circuit to synchronize an output signal of a frequency modulation circuit, the delay circuit, the triode Q3, the triode Q5 and the variable resistor RW1 are input together to form a frequency modulation circuit for modulating the frequency of the signal, an output port of a frequency modulation buffer module is connected with a frequency-adjustable Internet of things terminal controller, and the effect of active frequency modulation calibration of the output signal of the Internet of things terminal signal receiver is achieved.

Description

Frequency-adjustable Internet of things terminal
Technical Field
The invention relates to the technical field of Internet of things, in particular to a frequency-adjustable Internet of things terminal.
Background
At present, the internet of things terminal is a device for connecting a sensing network layer and a transmission network layer in the internet of things, and realizing data acquisition and data transmission to the network layer, the internet of things terminal needs to modulate frequency of a signal when receiving the data, so that the stability of the signal frequency is ensured, and the accuracy of the internet of things transmission data can be realized.
Disclosure of Invention
In view of the above situation, in order to overcome the defects in the prior art, the present invention provides a frequency-adjustable terminal for internet of things, which can actively adjust the frequency of an output signal of a signal receiver of the terminal for internet of things.
The technical scheme includes that the frequency-adjustable Internet of things terminal comprises a signal receiving module and a frequency modulation buffer module, wherein the signal receiving module receives an output signal of a signal receiver in the frequency-adjustable Internet of things terminal, the signal receiving module is connected with an input port of the frequency modulation buffer module through an operational amplifier AR1, and an output port of the frequency modulation buffer module is connected with a frequency-adjustable Internet of things terminal controller;
the frequency modulation buffer module comprises a triode Q1, the collector of the triode Q1 is connected with the cathode of a diode D2 and the anode of a diode D3, the base of the triode Q1 is connected with an inductor L4, one end of a capacitor C1 and a resistor R3 and the output port of the signal receiving module, the emitter of the triode Q1 is connected with the other end of the capacitor C1, one end of a resistor R6 and one end of a capacitor C2, the other end of the resistor R6 is connected with the base of the triode Q2, the collector of the triode Q3, the base of the triode Q4, the capacitor C3, a resistor R8, one end of a resistor R9 and the other end of the capacitor C2, the other end of the inductor L4 is connected with the other end of the capacitor C3, the other end of the resistor R3 is connected with one end of the resistor R4 and one end of the capacitor C4, the other end of the resistor R4 is connected with the base of the triode Q3, the emitter of the triode Q3 is connected with the other end of the capacitor C4, one end of the resistor R5, one end of the resistor R10 and the base of the triode Q5, the other end of the resistor R5 is grounded, the collector of the triode Q2 is connected with the negative electrode of the diode D3, the emitter of the triode Q2 is connected with one end of the resistor R7, the other end of the resistor R7 is grounded, the collector of the triode Q4 is connected with the other end of the resistor R8, one end of the capacitor C5 and a power supply +5V, the emitter of the triode Q4 is connected with the other end of the capacitor C5 and one end of the variable resistor RW1, the other end of the variable resistor RW1 is connected with the collector of the triode Q5, the emitter of the triode Q5 is connected with the other end of the resistor R10 and one end of the variable resistor RW2, one end of the capacitor C7, the other end of the capacitor C7 is grounded, the sliding end of the variable resistor RW1 is connected with one end of the capacitor C6, the other end of the capacitor C6 is connected with the non-inverting input end of the amplifier AR2, the inverting input end of the AR2 is connected with the sliding end of the variable resistor RW2, one end of the resistor R11 and the emitter of the triode Q2, the other end of the output end of the resistor R11 and the inductor L1, the capacitor C8, the resistor R8, the capacitor R8 and the emitter of the capacitor R1 are connected with the amplifier AR2, one end of a resistor R12 and the other end of the inductor L1 are connected with the other end of the variable resistor RW2 and one end of a capacitor C9, the other end of the resistor R12 is connected with one end of a resistor R13 and one end of a capacitor C8 and the anode of a diode D4, the other ends of the resistor R13 and the capacitor C9 are grounded, and the cathode of the diode D4 is connected with the frequency-adjustable Internet of things terminal controller.
Due to the adoption of the technical scheme, compared with the prior art, the invention has the following advantages;
1. the inductor L4 is used for filtering high-frequency signal components, the capacitors C1 and C2 are used for filtering low-frequency signal components, the triode Q1 plays a role in amplifying signal current and playing a role in boosting so as to ensure the strength of subsequent signals, meanwhile, in order to replace a reference signal in the prior art with a source signal for frequency modulation, a resistor R3 is used for dividing voltage, then the triode Q3 and the capacitor C4 are used for forming a delay circuit to synchronize frequency modulation circuit output signals, the delay circuit is input into the triode Q4, the triode Q5 and the variable resistor RW1 to form a frequency modulation circuit for modulating the signals, the frequency of the output signals of the frequency stabilizing circuit and the delay circuit can be ensured to be consistent, the output signals of the frequency stabilizing circuit are to-be-modulated signals, the output signals of the delay circuit are reference signals or PWM modulated signals in the prior art, and the source signals are divided by the resistor R3, so that the signal frequency is consistent with the source signal frequency at the moment, passive matching of the signal frequency is not needed, and the high practical value is achieved;
2. the method comprises the steps that a capacitor C5 and a capacitor C7 are used for carrying out signal modulation on the capacitor C5 and the capacitor C7, the frequency modulation effect is achieved, the amplitude value of a frequency modulation signal can be adjusted by adjusting the resistance value of a variable resistor RW1, in order to avoid the source signal containing abnormal signals, a triode Q2 is used for detecting the potential difference of a frequency stabilizing circuit output signal and a triode Q1 collector signal, when the signal contains abnormal high-level signals, the triode Q2 is conducted, the signal is fed back to the reverse phase input end of an operational amplifier AR2, the effect of reducing the amplitude of the output signal of the operational amplifier AR2 is achieved, the stability of the amplitude of the signal after frequency modulation is guaranteed, a capacitor C6 plays a decoupling effect, the operational amplifier AR2 plays a role in buffering signals, in order to further guarantee the signal waveform of the signal, the variable resistor RW2 is used for further feeding back the emitter signal of the triode Q5 to adjust the amplitude of the output signal of the operational amplifier AR2, and finally the signal is input into a frequency-adjustable terminal controller, and the effect of the calibration of the active frequency modulation of the Internet of the terminal signal receiver of the Internet of things is achieved.
Drawings
Fig. 1 is a schematic diagram of a frequency-adjustable internet of things terminal according to the invention.
Detailed Description
The foregoing and other technical and scientific aspects, features and utilities of the present invention will be apparent from the following detailed description of the embodiments, which is to be read in connection with the accompanying drawings of fig. 1. The structural contents mentioned in the following embodiments are all referred to the attached drawings of the specification.
In the first embodiment, the frequency-adjustable internet of things terminal comprises a signal receiving module and a frequency modulation buffer module, wherein the signal receiving module receives an output signal of a signal receiver in the frequency-adjustable internet of things terminal, the signal receiving module is connected with an input port of the frequency modulation buffer module through an operational amplifier AR1, and an output port of the frequency modulation buffer module is connected with a frequency-adjustable internet of things terminal controller;
the frequency modulation buffer module uses a triode Q1, a capacitor C2 and an inductor L4 to form a frequency stabilization circuit to receive an output signal of the signal receiving module, the inductor L4 filters a high-frequency signal component, the capacitor C1 and the capacitor C2 filter a low-frequency signal component, the triode Q1 plays a role of amplifying a signal current and plays a role of boosting so as to ensure the strength of a subsequent signal, meanwhile, in order to replace a reference signal in the prior art with a source signal for frequency modulation, a resistor R3 is used for voltage division, then a time delay circuit consisting of the triode Q3 and the capacitor C4 is used for synchronizing an output signal of the frequency modulation circuit, the triode Q4, the triode Q5 and a variable resistor RW1 are used for forming a frequency modulation circuit to modulate the frequency, the frequency of the output signals of the frequency stabilization circuit and the time delay circuit can be ensured to be consistent, at the time, the output signal of the frequency stabilization circuit is a signal to be modulated, and the output signal of the time delay circuit is a reference signal or a PWM signal in the prior art, because the output signal of the delay circuit is the source signal divided by the resistor R3, the signal frequency is consistent with the source signal at this moment, the passive configuration of the signal frequency is not needed, finally, the frequency modulation circuit modulates the signals by charging and discharging the capacitors C5 and C7, and realizes the frequency modulation effect, the amplitude value of the frequency modulation signal can be adjusted by adjusting the resistance value of the variable resistor RW1, wherein in order to avoid the source signal containing abnormal signals, the triode Q2 is used for detecting the output signal of the frequency stabilizing circuit and the collector signal potential difference of the triode Q1, when the signal contains abnormal high level signals, the triode Q2 is conducted at this moment, the signal is fed back to the inverting input end of the operational amplifier AR2, the effect of reducing the amplitude of the output signal of the operational amplifier AR2 is achieved, so as to ensure the stability of the amplitude of the signal after frequency modulation, the capacitor C6 plays a decoupling role, and the operational amplifier AR2 plays a role of buffering signal, finally, a filter circuit consisting of an inductor L1, a capacitor C8 and a capacitor C9 is used for filtering signals, in order to further ensure signal waveforms, a variable resistor RW2 is used for further feeding back an emitter signal of a triode Q5 to adjust the amplitude of an output signal of an operational amplifier AR2, and the output signal is finally input into a frequency-adjustable Internet of things terminal controller, so that the effect of active frequency modulation calibration of an output signal of an Internet of things terminal signal receiver is achieved;
the frequency modulation buffer module has a specific structure that a collector of a triode Q1 is connected with a cathode of a diode D2 and an anode of a diode D3, a base of the triode Q1 is connected with an inductor L4, a capacitor C1, one end of a resistor R3 and an output port of a signal receiving module, an emitter of the triode Q1 is connected with the other end of the capacitor C1, one end of a resistor R6 and one end of the capacitor C2, the other end of the resistor R6 is connected with a base of the triode Q2, a collector of the triode Q3, a base of the triode Q4, the capacitor C3, a resistor R8, one end of a resistor R9 and the other end of the capacitor C2, the other end of the inductor L4 is connected with the other end of the capacitor C3, the other end of the resistor R3 is connected with one end of the resistor R4 and one end of the capacitor C4, the emitter of the triode Q3 is connected with the other end of the capacitor C4, one end of the resistor R5, one end of the resistor R10 and the base of the triode Q5, the other end of the resistor R5 is grounded, the collector of the triode Q2 is connected with the negative electrode of the diode D3, the emitter of the triode Q2 is connected with one end of the resistor R7, the other end of the resistor R7 is grounded, the collector of the triode Q4 is connected with the other end of the resistor R8, one end of the capacitor C5 and a power supply +5V, the emitter of the triode Q4 is connected with the other end of the capacitor C5 and one end of the variable resistor RW1, the other end of the variable resistor RW1 is connected with the collector of the triode Q5, the emitter of the triode Q5 is connected with the other end of the resistor R10 and one end of the variable resistor RW2, one end of the capacitor C7, the other end of the capacitor C7 is grounded, the sliding end of the variable resistor RW1 is connected with one end of the capacitor C6, the other end of the capacitor C6 is connected with the non-inverting input end of the amplifier AR2, the inverting input end of the AR2 is connected with the sliding end of the variable resistor RW2, one end of the resistor R11 and the emitter of the triode Q2, the other end of the output end of the resistor R11 and the inductor L1, the capacitor C8, the resistor R8, the capacitor R8 and the emitter of the capacitor R1 are connected with the amplifier AR2, one end of a resistor R12 and the other end of the inductor L1 are connected with the other end of the variable resistor RW2 and one end of a capacitor C9, the other end of the resistor R12 is connected with one end of a resistor R13 and one end of a capacitor C8 and the anode of a diode D4, the other ends of the resistor R13 and the capacitor C9 are grounded, and the cathode of the diode D4 is connected with the frequency-adjustable Internet of things terminal controller.
In the second embodiment, on the basis of the first embodiment, the signal receiving module receives an output signal of a signal receiver in the frequency-adjustable internet of things terminal by using the operational amplifier AR1, the operational amplifier AR1 amplifies the signal power, the in-phase input end of the operational amplifier AR1 is connected with the anode of the diode D2, the cathode of the voltage regulator tube D1 and one end of the resistor R1, the anti-phase input end of the operational amplifier AR1 is connected with one ends of the resistor R2 and the resistor R14, the other end of the resistor R14 is grounded, the other end of the resistor R1 is connected with the frequency-adjustable internet of things terminal signal receiver, and the output end of the operational amplifier AR1 is connected with the other end of the resistor R2 and the signal input port of the frequency modulation buffer module.
When the frequency-adjustable Internet of things terminal is used specifically, the frequency-adjustable Internet of things terminal comprises a signal receiving module and a frequency-adjusting buffer module, wherein the signal receiving module receives an output signal of a signal receiver in the frequency-adjustable Internet of things terminal, the signal receiving module is connected with an input port of the frequency-adjusting buffer module through an operational amplifier AR1, an output port of the frequency-adjusting buffer module is connected with a frequency-adjustable Internet of things terminal controller, a frequency stabilizing circuit consisting of a triode Q1, a capacitor C2 and an inductor L4 is used for receiving an output signal of the signal receiving module, the inductor L4 filters a high-frequency signal component, the capacitor C1 and the capacitor C2 filter a low-frequency signal component, the triode Q1 plays a role in amplifying signal current and boosting to ensure the strength of a subsequent signal, meanwhile, in order to replace a reference signal in the prior art with a source signal for frequency adjustment, a resistor R3 is used for voltage division, then a delay circuit consisting of the triode Q3 and the capacitor C4 is used for synchronizing the output signal of the frequency-adjusting circuit, the frequency of the signals is modulated by a frequency modulation circuit which is composed of a triode Q4, a triode Q5 and a variable resistor RW1, the frequency of the output signals of the frequency stabilization circuit and the delay circuit can be ensured to be consistent, the output signal of the frequency stabilization circuit is the signal to be modulated, the output signal of the delay circuit is a reference signal or a PWM modulation signal in the prior art, the output signal of the delay circuit is a source signal divided by a resistor R3, therefore, the signal frequency is consistent with the source signal at the moment, the signal frequency is not required to be passively equipped, finally, the frequency modulation circuit modulates the signals of the frequency stabilization circuit and the delay circuit by charging and discharging of a capacitor C5 and a capacitor C7, the frequency modulation effect is realized, the amplitude value of the frequency modulation signal can be adjusted by adjusting the resistance value of the variable resistor RW1, wherein in order to avoid the source signal containing abnormal signals, the triode Q2 is used for detecting the potential difference between the output signal of the frequency stabilization circuit and the collector signal of the triode Q1, when the signal contains an abnormal high-level signal, the triode Q2 is conducted at the moment, the feedback signal is transmitted to the reverse phase input end of the operational amplifier AR2, the effect of reducing the amplitude of the output signal of the operational amplifier AR2 is achieved, the stability of the amplitude of the signal after frequency modulation is ensured, the capacitor C6 plays a decoupling role, the operational amplifier AR2 plays a role in buffering the signal, finally, the inductor L1, the capacitor C8 and the capacitor C9 are used for forming a filter circuit to filter the signal, in order to further ensure the signal waveform, the variable resistor RW2 is used for further feeding back the emitter signal of the triode Q5 to adjust the amplitude of the output signal of the operational amplifier AR2, and finally, the output signal is input into a frequency-adjustable terminal controller of the internet of things, and the effect of active frequency modulation and calibration of the output signal of the terminal receiver of the internet of things is achieved.
While the invention has been described in further detail with reference to specific embodiments thereof, it is not intended that the invention be limited to the specific embodiments thereof; for those skilled in the art to which the present invention pertains and related technologies, the extension, operation method and data replacement should fall within the protection scope of the present invention based on the technical solution of the present invention.

Claims (2)

1. A frequency-adjustable Internet of things terminal comprises a signal receiving module and a frequency modulation buffer module, and is characterized in that the signal receiving module receives an output signal of a signal receiver in the frequency-adjustable Internet of things terminal, the signal receiving module is connected with an input port of the frequency modulation buffer module through an operational amplifier AR1, and an output port of the frequency modulation buffer module is connected with a frequency-adjustable Internet of things terminal controller;
the frequency modulation buffer module comprises a triode Q1, a collector of the triode Q1 is connected with a cathode of a diode D2 and an anode of a diode D3, a base of the triode Q1 is connected with one end of an inductor L4, a capacitor C1 and a resistor R3 and an output port of a signal receiving module, an emitter of the triode Q1 is connected with the other end of the capacitor C1, one end of a resistor R6 and one end of a capacitor C2, the other end of the resistor R6 is connected with a base of the triode Q2, a collector of the triode Q3, a base of the triode Q4, one end of the capacitor C3, a resistor R8, one end of a resistor R9 and the other end of the capacitor C2, the other end of the inductor L4 is connected with the other end of the capacitor C3, the other end of the resistor R3 is connected with one end of the resistor R4 and one end of the capacitor C4, the other end of the resistor R4 is connected with a base of the triode Q3, an emitter of the triode Q3 is connected with the other end of the capacitor C4, one end of the resistor R5, one end of the resistor R10 and a base of the triode Q5, the other end of the resistor R5 is grounded, the collector of the triode Q2 is connected with the negative electrode of the diode D3, the emitter of the triode Q2 is connected with one end of the resistor R7, the other end of the resistor R7 is grounded, the collector of the triode Q4 is connected with the other end of the resistor R8, one end of the capacitor C5 and a power supply +5V, the emitter of the triode Q4 is connected with the other end of the capacitor C5 and one end of the variable resistor RW1, the other end of the variable resistor RW1 is connected with the collector of the triode Q5, the emitter of the triode Q5 is connected with the other end of the resistor R10 and one end of the variable resistor RW2, one end of the capacitor C7, the other end of the capacitor C7 is grounded, the sliding end of the variable resistor RW1 is connected with one end of the capacitor C6, the other end of the capacitor C6 is connected with the non-inverting input end of the amplifier AR2, the inverting input end of the AR2 is connected with the sliding end of the variable resistor RW2, one end of the resistor R11 and the emitter of the triode Q2, the other end of the output end of the resistor R11 and the inductor L1, the capacitor C8, the resistor R8, the capacitor R8 and the emitter of the capacitor R1 are connected with the amplifier AR2, one end of a resistor R12 and the other end of the inductor L1 are connected with the other end of the variable resistor RW2 and one end of a capacitor C9, the other end of the resistor R12 is connected with one end of a resistor R13 and one end of a capacitor C8 and the anode of a diode D4, the other ends of the resistor R13 and the capacitor C9 are grounded, and the cathode of the diode D4 is connected with the frequency-adjustable Internet of things terminal controller.
2. The terminal of the internet of things with the adjustable frequency according to claim 1, wherein the signal receiving module comprises an operational amplifier AR1, a non-inverting input terminal of the operational amplifier AR1 is connected with an anode of a diode D2, a cathode of a voltage regulator tube D1 and one end of a resistor R1, an inverting input terminal of the operational amplifier AR1 is connected with one ends of a resistor R2 and a resistor R14, the other end of the resistor R14 is grounded, the other end of the resistor R1 is connected with a terminal signal receiver of the internet of things with the adjustable frequency, and an output terminal of the operational amplifier AR1 is connected with the other end of the resistor R2 and a signal input port of the frequency modulation buffer module.
CN202010333661.1A 2020-04-24 2020-04-24 Frequency-adjustable Internet of things terminal Active CN111510501B (en)

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US7495518B1 (en) * 2007-07-05 2009-02-24 Matsushita Electric Industrial Automatic radio frequency feedback calibration circuit
CN109104163B (en) * 2018-09-30 2020-10-27 深圳市始足知识产权服务有限公司 Bridge project management system based on Internet of things
CN209852237U (en) * 2019-04-09 2019-12-27 郑州科技学院 Signal regulating circuit of intelligent control system of green automobile
CN110233633B (en) * 2019-06-18 2020-02-28 郑州工程技术学院 Computer data transmission system based on Internet of things

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