CN110233633B - Computer data transmission system based on Internet of things - Google Patents
Computer data transmission system based on Internet of things Download PDFInfo
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- CN110233633B CN110233633B CN201910524948.XA CN201910524948A CN110233633B CN 110233633 B CN110233633 B CN 110233633B CN 201910524948 A CN201910524948 A CN 201910524948A CN 110233633 B CN110233633 B CN 110233633B
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- 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
- H04B1/02—Transmitters
- H04B1/04—Circuits
- H04B1/0475—Circuits with means for limiting noise, interference or distortion
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B17/00—Monitoring; Testing
- H04B17/30—Monitoring; Testing of propagation channels
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- 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
- H04L27/12—Modulator circuits; Transmitter circuits
Abstract
The invention discloses a computer data transmission system based on the Internet of things, which comprises a frequency acquisition circuit, a feedback calibration circuit and a filtering transmitting circuit, the frequency acquisition circuit acquires the signal frequency of the input end of the analog signal transmission channel, the feedback calibration circuit amplifies the signal by using an operational amplifier AR1, meanwhile, a frequency selection circuit consisting of a capacitor C3-a capacitor C5 and a resistor R4-a resistor R6 is used for screening out signals with single frequency, and a triode Q3, a capacitor C6, a capacitor C7 and a capacitor C10 are used for forming a frequency modulation circuit to adjust the signal frequency and then input the signal frequency into the filtering transmitting circuit, the comparator AR2 compares output signals of the frequency selection circuit and the frequency modulation circuit and feeds back trigger signals of the triode Q1 and the triode Q2, and finally the filter transmitting circuit forms a filter circuit by using an inductor L2, a capacitor C8 and a capacitor C9 to filter the signals and is an error correction signal of the control terminal of the computer data transmission system based on the Internet of things.
Description
Technical Field
The invention relates to the technical field of circuits, in particular to a computer data transmission system based on the Internet of things.
Background
At present, with the continuous development of science and technology, a computer data transmission system based on the internet of things mainly comprises a host computer (host) or a data terminal equipment (DTE-data terminal equipment), a data circuit terminal equipment and an analog transmission channel, and the computer data transmission system determines the development performance of the internet of things, however, the analog transmission channel is a channel for receiving an output signal of an analog signal acquisition module by a computer control terminal based on the internet of things, and the signal usually undergoes frequency hopping due to the interference of common-frequency signals or strong magnetism in the transmission process, so that the error of the signal received by the computer control terminal based on the internet of things is large, and thus, the wrong analysis is made, and therefore, the signal in the analog signal transmission channel needs to be monitored in real time.
Disclosure of Invention
In view of the above situation, in order to overcome the defects of the prior art, the present invention aims to provide a computer data transmission system based on the internet of things, which has the characteristics of ingenious design and humanized design, can monitor the signal frequency at the input end of the analog signal transmission channel in real time, and automatically calibrate and convert the signal into an error correction signal of the control terminal of the computer data transmission system based on the internet of things.
The technical scheme includes that the computer data transmission system based on the Internet of things comprises a frequency acquisition circuit, a feedback calibration circuit and a filtering transmitting circuit, wherein the frequency acquisition circuit acquires signal frequency of an input end of an analog signal transmission channel, the analog signal transmission channel is a channel for receiving an output signal of an analog signal acquisition module by a computer control terminal based on the Internet of things, the feedback calibration circuit amplifies the signal by an operational amplifier AR1, a frequency selection circuit consisting of a capacitor C3-a capacitor C5 and a resistor R4-a resistor R6 is used for screening out a signal with single frequency, a frequency modulation circuit consisting of a triode Q3, a capacitor C6, a capacitor C7 and a capacitor C10 is used for adjusting the signal frequency and then inputting the signal into the filtering transmitting circuit, wherein a comparator AR2 compares output signals of the frequency selection circuit and the frequency modulation circuit into trigger signals of a feedback triode Q1 and a triode Q2, the triode Q2 feeds back a high-level signal to the inverting input end of the operational amplifier AR1, the triode Q1 feeds back a low-level signal to the frequency selection circuit, the output signal of the feedback calibration circuit is calibrated, and finally the filter transmitting circuit forms a filter circuit by using an inductor L2, a capacitor C8 and a capacitor C9 to filter the signal and transmits the signal to the control terminal of the computer data transmission system based on the Internet of things through a signal transmitter E1;
the feedback calibration circuit comprises an operational amplifier AR, wherein the non-inverting input end of the operational amplifier AR is connected with one end of a resistor R, the inverting input end of the operational amplifier AR is connected with one end of the resistor R and one end of the resistor R, the other end of the resistor R is grounded, the output end of the operational amplifier AR is connected with the other end of the resistor R and one end of the resistor R, one end of a capacitor C, the collector of a triode Q, the base of the triode Q, the other end of the resistor R is connected with the collector of the triode Q, one end of a capacitor C, the other end of the capacitor C is connected with the resistor R and one end of the capacitor C, the other ends of the resistor R and the capacitor C are grounded, the other end of the resistor R is connected with the other end of the capacitor C, one end of an inductor L, the base of the triode Q, the non-inverting input end of a comparator AR, the emitter of the triode Q is connected with the, The inverting input end of the comparator AR2, the other end of the inductor L4 is connected with the other end of the capacitor C10, the output end of the comparator AR2 is connected with the base electrode of the triode Q2, the collector electrode of the triode Q2 is connected with the power supply +5V, the emitter electrode of the triode Q2 is connected with the other end of the resistor R15, the cathode electrode of the diode D2, the anode electrode of the diode D3, and the anode electrode of the diode D2 is connected with the cathode electrode of the diode D3 and the emitter electrode of the triode Q1.
Due to the adoption of the technical scheme, compared with the prior art, the invention has the following advantages;
1. a frequency selection circuit consisting of a capacitor C3-a capacitor C5 and a resistor R4-a resistor R6 is used for screening out a signal with single frequency, the signal with single frequency is relatively stable, the stability of signal frequency can be improved, and the effect of filtering abnormal signal frequency is realized at the same time, a frequency modulation circuit consisting of a triode Q3, a capacitor C6, a capacitor C7 and a capacitor C10 is used for adjusting the signal frequency and then inputting the signal frequency into a filtering transmitting circuit, the capacitor C6 and the capacitor C7 are decoupling capacitors for filtering high-frequency signal noise, the capacitor C10 is a bypass capacitor for filtering low-frequency signal noise, and the frequency modulation effect is realized;
2. in order to further ensure the accuracy of error calibration signals, a comparator AR2 is used for comparing output signals of the frequency selection circuit and the frequency modulation circuit to be trigger signals of a feedback triode Q1 and a triode Q2, the comparator AR2 is firstly used for comparing the output signals of the frequency selection circuit and the frequency modulation circuit, the potential difference between the output signals of the frequency selection circuit and the frequency modulation circuit is used as a standard for detecting the abnormality of the output signals of the feedback calibration circuit, meanwhile, the triode Q2 and the triode Q1 can be triggered to be conducted, the accuracy of the output signals of the frequency modulation circuit is higher than that of the frequency modulation circuit, then, a triode Q2 is used for feeding back a high-level signal to the inverting input end of an operational amplifier AR1, and the triode Q1 is used for feeding back a low-level signal to the frequency selection circuit, so that the calibration effect on the output signals of the feedback;
2. a filter circuit formed by the inductor L2, the capacitor C8 and the capacitor C9 is used for filtering signals, filtering signal clutter, and the signals are sent to the control terminal of the computer data transmission system based on the Internet of things through the signal transmitter E1, namely error correction signals of the control terminal of the computer data transmission system based on the Internet of things, so that the accuracy of the computer data transmission system based on the Internet of things is improved.
Drawings
Fig. 1 is a schematic circuit diagram of a computer data transmission system based on the internet of things according to the present 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, a computer data transmission system based on the internet of things comprises a frequency acquisition circuit, a feedback calibration circuit and a filtering transmitting circuit, wherein the frequency acquisition circuit acquires the signal frequency of an input end of an analog signal transmission channel, the analog signal transmission channel is a channel for receiving an output signal of an analog signal acquisition module by a computer control terminal based on the internet of things, the feedback calibration circuit amplifies the signal by using an operational amplifier AR1, a frequency selection circuit consisting of a capacitor C3-a capacitor C5 and a resistor R4-a resistor R6 is used for screening a signal with a single frequency, a frequency modulation circuit consisting of a triode Q3, a capacitor C6, a capacitor C7 and a capacitor C10 is used for adjusting the signal frequency and then inputting the signal into the filtering transmitting circuit, wherein a comparator AR2 compares the output signals of the frequency selection circuit and the frequency modulation circuit to trigger signals fed back to the triodes Q1 and Q2, the triode Q2 feeds back a high-level signal to the inverting input end of the operational amplifier AR1, the triode Q1 feeds back a low-level signal to the frequency selection circuit, the output signal of the feedback calibration circuit is calibrated, and finally the filter transmitting circuit forms a filter circuit by using an inductor L2, a capacitor C8 and a capacitor C9 to filter the signal and transmits the signal to the control terminal of the computer data transmission system based on the Internet of things through a signal transmitter E1;
the feedback calibration circuit amplifies signals by using an operational amplifier AR1, amplifies signal power and compensates signal conduction loss, a frequency selection circuit consisting of a capacitor C3, a capacitor C5, a resistor R4 and a resistor R6 is used for screening signals with single frequency, the signals with single frequency are stable, the stability of signal frequency can be improved, and the function of filtering abnormal signal frequency is achieved at the same time, a frequency modulation circuit consisting of a triode Q3, a capacitor C6, a capacitor C7 and a capacitor C10 is used for adjusting signal frequency and then is input into a filtering transmitting circuit, the capacitors C6 and C7 are decoupling capacitors for filtering high-frequency signal noise, the capacitor C10 is a bypass capacitor for filtering low-frequency signal noise and achieving frequency modulation, the triode Q3 is an amplifying triode, and in order to further guarantee the precision of error calibration signals, the comparator AR2 is used for comparing output signals of the frequency selection circuit and the frequency modulation circuit to be output signals of the feedback triode Q1 and the frequency modulation, The trigger signal of the triode Q2 is obtained by firstly using the comparator AR2 to compare the output signals of the frequency selection circuit and the frequency modulation circuit, using the potential difference between the output signals as the standard for detecting the abnormity of the output signal of the feedback calibration circuit, simultaneously triggering the conduction of the triode Q2 and the triode Q1, and having higher accuracy than the output signal of the direct detection frequency modulation circuit, then using the triode Q2 to feed back a high level signal to the inverting input end of the operational amplifier AR1, and using the triode Q1 to feed back a low level signal to the frequency selection circuit, thereby realizing the calibration function of the output signal of the feedback calibration circuit, and ensuring the accuracy of the error correction signal of the control terminal of the computer data transmission system based on the Internet of things,
the feedback calibration circuit comprises a feedback calibration circuit, wherein the in-phase input end of an operational amplifier AR is connected with one end of a resistor R, the reverse-phase input end of the operational amplifier AR is connected with one end of the resistor R and one end of the resistor R, the other end of the resistor R is grounded, the output end of the operational amplifier AR is connected with the other end of the resistor R and one end of the resistor R, one end of a capacitor C, the collector of a capacitor C, the base of a triode Q, the other end of the resistor R is connected with the collector of the triode Q, one end of the capacitor C, the other end of the capacitor C is connected with the resistor R and one end of the capacitor C, the other ends of the resistor R and the capacitor C are grounded, the other end of the resistor R is connected with the other end of the capacitor C, one end of an inductor L, the base of the triode Q and the in-phase input end of a comparator AR, the emitter of the triode Q, The inverting input end of the comparator AR2, the other end of the inductor L4 is connected with the other end of the capacitor C10, the output end of the comparator AR2 is connected with the base electrode of the triode Q2, the collector electrode of the triode Q2 is connected with the power supply +5V, the emitter electrode of the triode Q2 is connected with the other end of the resistor R15, the cathode electrode of the diode D2, the anode electrode of the diode D3, and the anode electrode of the diode D2 is connected with the cathode electrode of the diode D3 and the emitter electrode of the triode Q1.
In the second embodiment, based on the first embodiment, the filtering transmission uses a filter circuit composed of an inductor L2, a capacitor C8 and a capacitor C9 to filter signals, filter out signal noise, and send the signal to a control terminal of the internet of things-based computer data transmission system through a signal transmitter E1, that is, an error correction signal for the control terminal of the internet of things-based computer data transmission system, one end of an inductor L2 is connected to a resistor R13, one end of a capacitor C8 and an inverting input end of a comparator AR2, the other end of an inductor L2 is connected to one end of a resistor R14 and one end of a capacitor C9, the other ends of a resistor R13, a capacitor C8 and a capacitor C9 are grounded, and the other end of a resistor R14 is connected to a signal transmitter E1.
In a third embodiment, on the basis of the first embodiment, the frequency acquisition circuit selects a frequency collector J1 with the model of SJ-ADC to acquire the signal frequency at the input end of the analog signal transmission channel, and meanwhile, a pi-type filter circuit composed of an inductor L2, a capacitor C1 and a capacitor C2 is used for filtering, the power supply end of the frequency collector J1 is connected to +5V, the grounding end of the frequency collector J1 is grounded, the output end of the frequency collector J1 is connected to the negative electrode of a voltage regulator D1 and one end of a resistor R1, the positive electrode of the voltage regulator D1 is grounded, the other end of the resistor R1 is connected to one end of a capacitor C1 and one end of an inductor L1, the other end of the capacitor C1 is grounded, the other end of the inductor L1 is connected to one end of a capacitor C2 and the non-inverting input end of.
When the invention is used in particular, the invention relates to a computer data transmission system based on the Internet of things, which comprises a frequency acquisition circuit, a feedback calibration circuit and a filtering transmitting circuit, wherein the frequency acquisition circuit acquires the signal frequency of the input end of an analog signal transmission channel, the analog signal transmission channel is a channel for receiving the output signal of an analog signal acquisition module by a computer control terminal based on the Internet of things, the feedback calibration circuit amplifies the signal by using an operational amplifier AR1, amplifies the signal power and compensates the signal conduction loss, a frequency selection circuit consisting of a capacitor C3-a capacitor C5 and a resistor R4-a resistor R6 is used for screening the signal with single frequency, the signal with single frequency is stable, the stability of the signal frequency can be improved, the function of filtering abnormal signal frequency is realized, a frequency modulation circuit consisting of a triode Q3, a capacitor C6, a capacitor C7 and a capacitor C10 is used for adjusting the signal frequency and then is input into the filtering transmitting circuit, the capacitor C6 and the capacitor C7 are decoupling capacitors for filtering high-frequency signal noise, the capacitor C10 is a bypass capacitor for filtering low-frequency signal noise to realize frequency modulation, the triode Q3 is an amplifying triode, in order to further ensure the precision of error calibration signals, a comparator AR2 is used for comparing output signals of a frequency selection circuit and a frequency modulation circuit to be trigger signals of a feedback triode Q1 and a triode Q2, the comparator AR2 is used for comparing output signals of the frequency selection circuit and the frequency modulation circuit, the potential difference between the output signals is used as a standard for detecting the abnormality of the output signals of the feedback calibration circuit, the triode Q2 and the triode Q1 can be triggered to be conducted, the accuracy of the output signals of the frequency modulation circuit is higher than that of the direct detection, then the triode Q2 is used for feeding back a high-level signal to the inverting input end of an operational amplifier AR1, the triode Q1 is used for feeding back a low-level signal to the frequency selection circuit, the accuracy of error correction signals of the control terminal of the computer data transmission system based on the Internet of things is guaranteed, and finally the filter transmitting circuit utilizes the inductor L2, the capacitor C8 and the capacitor C9 to form a filter circuit to filter signals, and the filter circuit is sent into the control terminal of the computer data transmission system based on the Internet of things through the signal transmitter E1.
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 (3)
1. A computer data transmission system based on the Internet of things comprises a frequency acquisition circuit, a feedback calibration circuit and a filtering transmitting circuit, and is characterized in that the frequency acquisition circuit acquires the signal frequency of the input end of an analog signal transmission channel, the analog signal transmission channel is a channel for receiving the output signal of an analog signal acquisition module by a computer control terminal based on the Internet of things, the feedback calibration circuit amplifies the signal by an operational amplifier AR1, and simultaneously a frequency selection circuit consisting of a capacitor C3, a capacitor C4, a capacitor C5, a resistor R4, a resistor R5 and a resistor R6 selects a signal with single frequency, a frequency modulation circuit consisting of a triode Q3, a capacitor C6, a capacitor C7 and a capacitor C10 is used for adjusting the signal frequency and then the signal is input into the filtering transmitting circuit, wherein the comparator AR2 compares the output signals of the frequency selection circuit and the frequency modulation circuit into trigger signals of a feedback triode Q1 and a triode Q2, the triode Q2 feeds back a high-level signal to the inverting input end of the operational amplifier AR1, the triode Q1 feeds back a low-level signal to the frequency selection circuit, the output signal of the feedback calibration circuit is calibrated, and finally the filter transmitting circuit forms a filter circuit by using an inductor L2, a capacitor C8 and a capacitor C9 to filter the signal and transmits the signal to the control terminal of the computer data transmission system based on the Internet of things through a signal transmitter E1;
the feedback calibration circuit comprises an operational amplifier AR, wherein the non-inverting input end of the operational amplifier AR is connected with one end of a resistor R, the inverting input end of the operational amplifier AR is connected with one end of the resistor R and one end of the resistor R, the other end of the resistor R is grounded, the output end of the operational amplifier AR is connected with the other end of the resistor R and one end of the resistor R, one end of a capacitor C, the collector of a triode Q, the base of the triode Q, the other end of the resistor R is connected with the collector of the triode Q, one end of a capacitor C, the other end of the capacitor C is connected with the resistor R and one end of the capacitor C, the other ends of the resistor R and the capacitor C are grounded, the other end of the resistor R is connected with the other end of the capacitor C, one end of an inductor L, the base of the triode Q, the non-inverting input end of a comparator AR, the emitter of the triode Q is connected with the, The inverting input end of the comparator AR2, the other end of the inductor L4 is connected with the other end of the capacitor C10, the output end of the comparator AR2 is connected with the base electrode of the triode Q2, the collector electrode of the triode Q2 is connected with a +5V power supply, the emitter electrode of the triode Q2 is connected with the other end of the resistor R15, the cathode electrode of the diode D2, the anode electrode of the diode D3, and the anode electrode of the diode D2 is connected with the cathode electrode of the diode D3 and the emitter electrode of the triode Q1.
2. The computer data transmission system based on the internet of things as claimed in claim 1, wherein the filtering and transmitting circuit comprises an inductor L2, one end of the inductor L2 is connected to a resistor R13, one end of a capacitor C8 and the inverting input terminal of a comparator AR2, the other end of the inductor L2 is connected to a resistor R14, one end of a capacitor C9, the other ends of the resistor R13, the capacitor C8 and the capacitor C9 are connected to ground, and the other end of the resistor R14 is connected to a signal transmitter E1.
3. The computer data transmission system based on the internet of things as claimed in claim 1, wherein the frequency acquisition circuit comprises a frequency collector J1 with model number SJ-ADC, the power supply of the frequency collector J1 is connected with +5V power supply, the ground terminal of the frequency collector J1 is grounded, the output terminal of the frequency collector J1 is connected with the cathode of a voltage regulator D1 and one end of a resistor R1, the anode of the voltage regulator D1 is grounded, the other terminal of the resistor R1 is connected with one end of a capacitor C1 and one end of an inductor L1, the other terminal of the capacitor C1 is grounded, the other terminal of the inductor L1 is connected with one end of a capacitor C2 and the non-inverting input terminal of an operational amplifier AR1, and the other terminal of the capacitor C2 is grounded.
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| CN201910524948.XA CN110233633B (en) | 2019-06-18 | 2019-06-18 | Computer data transmission system based on Internet of things |
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| CN111162892B (en) * | 2020-02-25 | 2020-09-15 | 郑州铁路职业技术学院 | Multichannel communication synchronous transmission system |
| CN111245456B (en) * | 2020-03-01 | 2020-10-02 | 北京瞭望神州科技有限公司 | Service management system based on big data |
| CN111294303A (en) * | 2020-03-16 | 2020-06-16 | 无锡原旭机电科技有限公司 | Bridge safety management system based on Internet of things |
| CN111487907B (en) * | 2020-04-24 | 2020-12-22 | 南京南大工程检测有限公司 | Building construction monitored control system based on 5G communication |
| CN111510501B (en) * | 2020-04-24 | 2022-10-18 | 国网河南省电力公司信息通信公司 | Frequency-adjustable Internet of things terminal |
| CN111404785A (en) * | 2020-05-13 | 2020-07-10 | 袁野 | 5G mobile network detection system based on cloud computing |
| CN111431546B (en) * | 2020-05-20 | 2021-02-09 | 华兴通信技术有限公司 | Digital microwave signal anti-distortion circuit |
| CN111585541B (en) * | 2020-06-03 | 2021-02-09 | 深圳市昊源建设监理有限公司 | Building construction remote monitoring system based on thing networking |
| CN111817737B (en) * | 2020-07-30 | 2021-10-01 | 黄河水利职业技术学院 | Signal frequency control circuit of radio communication system |
| CN113242095B (en) * | 2021-06-29 | 2022-05-06 | 京鼎工程建设有限公司 | Computer electronic communication system |
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| CN100576767C (en) * | 2005-06-03 | 2009-12-30 | 株式会社Ntt都科摩 | Feed forward amplifier for multiple frequency bands |
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| CN108205857A (en) * | 2017-12-05 | 2018-06-26 | 西安工程大学 | A kind of electrical communication system |
| CN109412627A (en) * | 2018-09-26 | 2019-03-01 | 郑州工程技术学院 | A kind of industrial control system based on Internet of Things |
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