CN109309507B - Big data-based power grid safety management information system - Google Patents
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- CN109309507B CN109309507B CN201811452705.1A CN201811452705A CN109309507B CN 109309507 B CN109309507 B CN 109309507B CN 201811452705 A CN201811452705 A CN 201811452705A CN 109309507 B CN109309507 B CN 109309507B
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- H04B1/10—Means associated with receiver for limiting or suppressing noise or interference
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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
- H04B1/06—Receivers
- H04B1/10—Means associated with receiver for limiting or suppressing noise or interference
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Abstract
The invention discloses a big data-based power grid safety management information system.A weak signal in a power grid big data transmission channel received by an interference suppression circuit enters a variable resistance amplification circuit after being filtered to remove pilot frequency interference, suppress electromagnetic interference and eliminate spike pulse interference and entering a differential circuit to suppress common mode interference, a matching circuit consisting of inductors L6 and L7 and capacitors C9 and C10 is connected to the input end of an operational amplifier AR1 for proportional amplification, an operational amplifier AR2 is used for calculating an offset value, and the matching circuit composed of the resistor R8, the inductor L8 and the capacitor C11 is connected in parallel to the matching circuit at the input end of the operational amplifier AR1, the amplification proportion of the operational amplifier AR1 is controlled, and finally stable signals which are not interfered, meet the signal amplitude and are lossless are transmitted to a server of a big data power grid safety management information system after impedance matching is carried out on the signals by the output matching circuit. The problems that signals in a network information transmission channel are distorted and attenuated and cannot be effectively received by a server are effectively solved.
Description
Technical Field
The invention relates to the technical field of power grid safety management, in particular to a big data-based power grid safety management information system.
Background
The big data power grid safety management information system is a physical-information system of a deep fusion computing, communication and control technology, and comprises a data acquisition device, a state detector, a controller, a communication device, a high-performance computing decision device (server) and other information devices, wherein the real-time performance of receiving power grid operation parameter information plays a key role in the reliability of the big data power grid safety management information system, and particularly when the big data power grid safety management information system receives massive power grid operation parameter information, the problems that the signal in a network information transmission channel received by the server is distorted and attenuated and cannot be effectively received due to the influences of network transmission modes (optical fibers, GPRS and the like), transmission distance, noise and other signals of big data communication are caused.
The present invention provides a new solution to this problem.
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 big data-based power grid security management information system, which has the characteristics of ingenious design and humanized design, and effectively solves the problem that signal distortion and attenuation in a network information transmission channel cannot be effectively received by a server.
The technical scheme includes that the device comprises an interference suppression circuit, a variable resistance amplification circuit and an output matching circuit, and is characterized in that weak signals in a power grid big data transmission channel received by the interference suppression circuit are filtered by a band-pass filter consisting of capacitors C1, C2, CP1 and inductors L1-L3 to remove different-frequency interference, a transient suppression diode VD1 suppresses electromagnetic interference, a peak pulse release circuit taking a thyristor VTL1 as a core eliminates peak pulse interference in common-frequency signals, then the peak pulse release circuit enters a difference circuit taking a triode Q1 and a triode Q2 as the core, common-mode interference is suppressed, the variable resistance amplification circuit enters the variable resistance amplification circuit, the variable resistance amplification circuit is connected to an input end of an operational amplifier AR2 through a matching circuit consisting of inductors L6 and L7 and capacitors C9 and C10 to perform proportional amplification, an offset value of the amplitude of a proportional amplification signal is calculated by using the operational amplifier AR2, and the offset value is calculated through, A matching circuit formed by the inductor L8 and the capacitor C11 is equivalent to a resistor and is connected to the matching circuit at the input end of the operational amplifier AR1 in parallel, so that the amplification proportion of the operational amplifier AR1 is controlled, and finally the operational amplifier AR1 enters an output matching circuit, and a non-attenuated signal is transmitted to a server of a big data power grid safety management information system after voltage stabilization, filtering and impedance matching;
the output matching circuit comprises a voltage regulator tube Z4 and an inductor L9, the negative electrode of the voltage regulator tube Z4 and the left end of the inductor L9 are connected with output signals of the variable resistance amplifying circuit, the right end of the inductor L9 is connected with the left end of the inductor L10, one end of the capacitor C15 and one end of the capacitor C16 respectively, the right end of the inductor L10 is connected with the other end of the capacitor C15 and the upper end of the resistor R13 respectively, the lower end of the resistor R13 is connected with the right end of the inductor L11, the positive electrode of the voltage regulator tube Z4, the other end of the capacitor C16 and the left end of the inductor L11 are all connected to the ground, and the right end of the inductor L10 is used for outputting signals of the matching circuit and transmitting the output signals.
Due to the adoption of the technical scheme, compared with the prior art, the invention has the following advantages;
1, a received weak signal in a power grid big data transmission channel is filtered by a band-pass filter to remove pilot frequency interference, a transient suppression diode VD1 is used for suppressing electromagnetic interference, a spike pulse release circuit is used for eliminating spike pulse interference in a same-frequency signal, then the weak signal enters a differential circuit with a triode Q1 and a triode Q2 as cores, common mode interference and temperature drift are suppressed, and then the weak signal is output to a post-stage circuit, so that the problem of signal distortion in the network information transmission channel caused by the influence of noise and other signal interference is avoided, and the signal receiving precision is improved;
2, a matching circuit composed of inductors L6 and L7 and capacitors C9 and C10 is connected to the input end of an operational amplifier AR2 for proportional amplification, an operational amplifier AR2 is used for calculating a deviation value of the amplitude of a proportional amplification signal, the deviation value is equivalent to a resistor through the matching circuit composed of a resistor R8, an inductor L8 and a capacitor C11 and is connected to the matching circuit at the input end of an operational amplifier AR1 in parallel, so that the amplification proportion of the operational amplifier AR1 is controlled, the problem of signal attenuation in channel transmission is compensated, and finally stable signals which are free of interference, meet the signal amplitude and are transmitted to a server of a large data power grid safety management information system in a lossless mode after voltage stabilization, filtering and impedance matching.
Drawings
FIG. 1 is a block diagram of a circuit of the present invention.
Fig. 2 is a schematic circuit diagram of the present invention.
Fig. 3 is a signal flow diagram of the interference suppression circuit of the present invention.
Detailed Description
The foregoing and other technical matters, features and effects 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 to 3. The structural contents mentioned in the following embodiments are all referred to the attached drawings of the specification.
Exemplary embodiments of the present invention will be described below with reference to the accompanying drawings.
In the first embodiment, a large data-based power grid safety management information system, a weak signal in a power grid large data transmission channel received by an interference suppression circuit is filtered to remove different-frequency interference through a band-pass filter consisting of a capacitor C1, a capacitor C2, an inductor L1, an inductor L2, an inductor L3 and a capacitor CP1, then electromagnetic interference is suppressed by a transient suppression diode VD1 to be transmitted to the rear stage, a peak pulse release circuit consisting of a resistor R1, a capacitor C3-C5, a thyristor VTL1 and a voltage regulator tube Z1 eliminates peak pulse interference in a same-frequency signal, the peak pulse interference enters a differential circuit taking a triode Q1 and a triode Q2 as cores and is output after common-mode interference and temperature drift are suppressed, wherein a voltage division circuit consisting of a resistor R4 and a resistor R5 is arranged to collect an output signal of the differential circuit, when the differential circuit is out of adjustment, the voltage division signal is applied to a base of a triode Q3, and forms a voltage difference with an input signal of the differential, the triode Q3 is conducted, the adjustable end of the potentiometer RW1 is connected with a differential circuit input signal for zero setting, the inductor L2, the resistor R2, the capacitor C7, the inductor L5, the resistor R3 and the capacitor C8 are power supply +5V noise filter circuits, stable static working points are provided for the triode Q1 and the triode Q2, the variable-resistance amplifying circuit is matched with output internal resistance for receiving an interference suppression circuit output signal through a matching circuit formed by the inductor L6, the inductor L7 and the capacitors C9 and C10, the interference suppression circuit output signal is obtained without attenuation and is connected to the input end of the operational amplifier AR2 as an input resistor, the signal is output after being subjected to proportional amplification through an in-phase proportional amplifying circuit formed by the operational amplifier AR2, the resistor R6, the resistor R7 and the transient suppression diode VD1, and in order to ensure that the amplified signal amplitude meets the requirement of a server on the signal amplitude, the signal after proportional amplification is filtered through the capacitor C14, The resistor R11 enters the non-inverting input end of an operational amplifier AR2 after current limiting, difference value proportion operation is carried out on the non-inverting input end and a standard amplitude signal input by the inverting input end, a deviation value is calculated, the deviation value is equivalent to a resistor through a matching circuit formed by a resistor R8, an inductor L8 and a capacitor C11 and is connected to the matching circuit at the input end of an operational amplifier AR1 in parallel, the amplification proportion of the operational amplifier AR1 is controlled, the amplitude precision of the amplified signal is controlled, the signal amplified by the rheostatic impedance amplification circuit meets the requirement of a server on the signal amplitude, the signal finally enters an output matching circuit, voltage stabilization is carried out through a voltage stabilization tube Z4, an LC filter circuit formed by an inductor L9 and a capacitor C16 filters, the capacitor C16, an inductor L10 and a capacitor C15 which are connected in parallel, and a pi-type output matching network formed by a resistor R13 and an inductor L11 which are, Stable signals meeting the signal amplitude are transmitted to a server of a big data power grid safety management information system;
the output matching circuit receives signals output by the variable resistance amplifying circuit, the signals are stabilized by a voltage stabilizing tube Z4, an LC filter circuit consisting of an inductor L9 and a capacitor C16 performs filtering, a capacitor C16, an inductor L10 and a capacitor C15 which are connected in parallel, a pi-shaped output matching network consisting of a resistor R13 and an inductor L11 which are connected in series perform impedance matching with a transmission line connected with a server, and the server transmits stable signals which are not interfered and meet signal amplitude to a large data power grid safety management information system in a lossless manner The other end of the capacitor C16 and the left end of the inductor L11 are both connected to the ground, and the right end of the inductor L10 is used for outputting an output signal of the matching circuit and transmitting the output signal to a server of a big data power grid safety management information system.
In the second embodiment, on the basis of the first embodiment, the impedance-varying amplifying circuit matches the output internal resistance of the signal output by the interference suppression circuit through a matching circuit composed of inductors L6, L7, capacitors C9, and C10, obtains the signal output by the interference suppression circuit without attenuation, connects the signal to the input end of an operational amplifier AR2 as an input resistor, and outputs the signal after proportional amplification through an in-phase proportional amplifying circuit composed of an operational amplifier AR2, a resistor R6, a resistor R7, and a transient suppression diode VD1, wherein the resistor R7 is a feedback resistor and the transient suppression diode VD1 are set for suppressing spike noise, in order to ensure that the amplified signal amplitude meets the requirement of the server for the signal amplitude, the signal after proportional amplification enters the in-phase input end of the operational amplifier AR2 after being filtered by the capacitor C14 and limited by the resistor R11, and performs a difference proportional operation with the standard amplitude signal input by the inverting input end, calculating an offset value, wherein the offset value is equivalent to a resistor through a matching circuit consisting of a resistor R8, an inductor L8 and a capacitor C11 and is connected in parallel to a matching circuit at the input end of an operational amplifier AR1, so as to control the amplification proportion of the operational amplifier AR1 and further control the precision of the amplitude of an amplified signal, and ensure that the signal amplified by the variable resistance amplifying circuit meets the requirement of a server on the signal amplitude, the offset value comprises an inductor L6 and a capacitor C9, the left end of the inductor L6 and one end of a grounded capacitor C9 are connected with the collector of a triode Q1, the right end of the inductor L6 is respectively connected with one end of a grounded capacitor C10 and the left end of an inductor L7, the right end of the inductor L7 is respectively connected with the non-inverting input end of the operational amplifier AR1, one end of the resistor R7 and one end of a transient suppression diode VD1, the inverting AR input end of the operational amplifier AR1 is respectively connected with one end of a grounded resistor R6 and, The other end of the transient suppression diode VD1, one end of the resistor R11, one end of the grounded capacitor C14, the other end of the resistor R11 is connected with the non-inverting input end of the operational amplifier AR2, the inverting input end of the operational amplifier AR2 is connected with one end of the resistor R10 and one end of the resistor R12 respectively, the other end of the resistor R12 is connected with a standard amplitude signal, the other end of the resistor R10 is connected with the output end of the operational amplifier AR2 and the anode of the capacitor C13 respectively, the cathode of the capacitor C13 is connected with one end of the capacitor C12, one end of the grounded resistor R9, one end of the resistor R8, one end of the inductor L8 and the non-inverting input end of the operational amplifier AR1 respectively, the other end of the resistor R6368628, the other end of the inductor L599 and the anode of the capacitor C11 are connected with a power supply of +5V, the cathode of the.
In a third embodiment, on the basis of the second embodiment, the weak signal in the power grid large data transmission channel received by the interference suppression circuit is filtered to remove the inter-frequency interference by a band-pass filter composed of a capacitor C1, a capacitor C2, an inductor L1, an inductor L2, an inductor L3 and a capacitor CP1, a high-pass filter circuit composed of a capacitor C1, a capacitor C2 and an inductor L1 is connected in series with a low-pass filter circuit composed of an inductor L2, an inductor L3 and a capacitor CP1 to form the band-pass filter, only the frequency component of the weak signal in the power grid large data transmission channel is allowed to pass through, other frequency components are prevented from passing through, the frequency component range allowed by any inductor and adjustable capacitance value is adjusted to pass through, the interference signal is filtered, the anti-interference capability is improved, then the transient suppression diode VD1 is used to suppress the electromagnetic interference to be transmitted to the later stage, and the spike release circuit composed of a resistor R1, a capacitor C3-C5, a thyristor VTL1 and a regulator Z1 When the peak pulse of the voltage regulator tube Z1 is broken down, the thyristor VTL1 is conducted, the peak pulse interference enters a differential circuit taking a triode Q1 and a triode Q2 as cores after being released to the ground through a capacitor C3, the anode and the cathode of the thyristor VTL1 and a capacitor C5), the output is output after common mode interference and temperature drift are inhibited, wherein a voltage division circuit consisting of a resistor R4 and a resistor R5 is arranged for collecting an output signal of the differential circuit, when the differential circuit is out of regulation, the voltage division signal is added to the base electrode of the triode Q3 to form a voltage difference with a differential circuit input signal accessed by an emitter of a triode Q3, the triode Q3 is conducted, a potentiometer RW1 can be regulated into the input signal of the differential circuit for zero setting, an inductor L2, a resistor R2, a capacitor C7, an inductor L5, a resistor R3 and a capacitor C8 are used as a noise filter circuit with a power supply of +5V, a stable static working point is provided for the triode Q5 and the triode Q, the negative electrode of a capacitor C1 receives a weak signal in a power grid big data transmission channel, the positive electrode of the capacitor C1 is respectively connected with one end of an inductor L1 and the negative electrode of a capacitor C2, the positive electrode of the capacitor C2 is connected with one end of an inductor L2, the other end of the inductor L2 is respectively connected with one end of an inductor L3 and one end of a capacitor CP1, the other end of an inductor L3 is respectively connected with one end of a transient suppression diode VD1, one end of a resistor R1, one end of a capacitor C3 and the base of a triode Q1, the other end of the inductor L1, the other end of a capacitor CP1 and the other end of a transient suppression diode VD1 are respectively connected with the base of a triode Q2, the other end of the capacitor C3 is connected with the anode of a thyristor VTL 3, the other end of the resistor R3 is connected with the negative electrode of a voltage regulator Z3, the positive electrode of the voltage regulator Z3 is respectively connected with one end of the capacitor C3, one end of a capacitor C5 and the other end of a capacitor C5 are connected with the ground, a collector of a triode Q1 is connected with one end of a capacitor C7 and one end of an inductor L4, the other end of a capacitor C7 is connected with one end of a resistor R2, a collector of a triode Q2 is connected with one end of a capacitor C8 and one end of an inductor L5, the other end of a capacitor C8 is connected with one end of a resistor R3, the other end of a resistor R2 and the other end of a resistor R3, the other end of the inductor L4 and the other end of the inductor L5 are both connected with +5V, the collector of the triode Q1 is further connected with one end of a resistor R4, the other end of the resistor R4 is connected with one end of a ground resistor R5 and the base of the triode Q3, the collector of the triode Q3 is connected with the adjustable end of a potentiometer RW1, the left end of the potentiometer RW1 is connected with the emitter of the triode Q1, the right end of the potentiometer RW1 is connected with the emitter of the triode Q2, the emitter of the triode Q3 is connected with one end of a capacitor C6, and the other end of the capacitor C6 is connected with the base of the triode Q39.
When the invention is used specifically, a weak signal in a power grid big data transmission channel received by an interference suppression circuit is filtered to eliminate different-frequency interference through a band-pass filter consisting of a capacitor C1, a capacitor C2, an inductor L1, an inductor L2, an inductor L3 and a capacitor CP1, a high-pass filter circuit consisting of a capacitor C1, a capacitor C2 and an inductor L1 is connected in series with a low-pass filter circuit consisting of an inductor L2, an inductor L3 and a capacitor CP1 to form the band-pass filter, only the frequency component of the weak signal in the power grid big data transmission channel is allowed to pass, other frequency components are prevented from passing, any frequency component range allowing adjustment and adjustment of capacitance value to pass is adjusted, interference signals are filtered, the anti-interference capability is improved, electromagnetic interference is suppressed from being transmitted to a later stage through a transient suppression diode 1, a spike pulse release circuit consisting of a resistor R1, a capacitor C3-C5, a thyristor VTL1 and a voltage regulator Z1 eliminates spike pulse interference in common-frequency signals (when the specific A voltage regulator tube Z1 is broken down, a thyristor VTL1 is conducted, spike pulse interference enters a differential circuit taking a transistor Q1 and a transistor Q2 as cores after being released to the ground through a capacitor C3, an anode and a cathode of the thyristor VTL1 and a capacitor C5), common mode interference and temperature drift are inhibited, and output is achieved, wherein a voltage division circuit consisting of a resistor R4 and a resistor R5 is arranged for acquiring output signals of the differential circuit, when the differential circuit is out of regulation, the divided signals are added to a base electrode of the transistor Q3 and form voltage difference with differential circuit input signals accessed by an emitter of a transistor Q3, the transistor Q3 is conducted, an adjustable end of a potentiometer RW1 is connected with a differential circuit input signal for zero adjustment, an inductor L2, a resistor R2, a capacitor C7, an inductor L5, a resistor R3 and a capacitor C8 are noise filter circuits with a power supply of +5V, a stable working point is provided for the transistor Q365 and a static transistor Q2, and a variable resistance amplifying circuit is, A matching circuit consisting of L7, capacitors C9 and C10 is matched with the output internal resistance for receiving the output signal of the interference suppression circuit, the output signal of the interference suppression circuit is obtained without attenuation and is connected to the input end of an operational amplifier AR2 as an input resistor, the signal is output after being amplified in proportion by an in-phase proportion amplifying circuit consisting of an operational amplifier AR2, a resistor R6, a resistor R7 and a transient suppression diode VD1, wherein the resistor R7 is a feedback resistor, the transient suppression diode VD1 is set for suppressing spike noise, in order to ensure that the amplified signal amplitude meets the requirement of a server on the signal amplitude, the amplified signal is filtered by a capacitor C14, current is limited by a resistor R11 and then enters the in-phase input end of the operational amplifier AR2, the amplified signal is subjected to difference proportion operation with a standard amplitude signal input by an opposite-phase offset value input end, the offset value is calculated, the offset value is equivalent to a resistor through a matching circuit consisting of a, the signal is connected to a matching circuit at the input end of an operational amplifier AR1 in parallel, the amplification proportion of the operational amplifier AR1 is controlled, the amplitude precision of the amplified signal is further controlled, the signal after being amplified by the variable resistance amplifying circuit meets the requirement of a server on the signal amplitude, the signal finally enters an output matching circuit, is subjected to voltage stabilization by a voltage stabilizing tube Z4, is filtered by an LC filter circuit consisting of an inductor L9 and a capacitor C16, is subjected to impedance matching by a transmission line connected with the server by a pi-type output matching network consisting of a capacitor C16, an inductor L10 and a capacitor C15 which are connected in parallel, a resistor R13 and an inductor L11 which are connected in series, and transmits the stable signal which meets the signal amplitude and is not interfered to the server of the large data power grid safety management information system.
Claims (1)
1. A power grid safety management information system based on big data comprises an interference suppression circuit, a variable resistance amplification circuit and an output matching circuit, and is characterized in that weak signals in a power grid big data transmission channel received by the interference suppression circuit are filtered by a band-pass filter consisting of capacitors C1, C2, CP1 and inductors L1-L3 to remove different-frequency interference, a transient suppression diode VD1 suppresses electromagnetic interference, a peak pulse release circuit taking a thyristor VTL1 as a core eliminates peak pulse interference in common-frequency signals, then the peak pulse interference enters a difference circuit taking a triode Q1 and a triode Q2 as the core, common-mode interference is suppressed, then the difference circuit enters the variable resistance amplification circuit, the variable resistance amplification circuit is connected to an input end of an operational amplifier AR1 through a matching circuit consisting of inductors L6, L7 and capacitors C9 and C10 to perform proportional amplification, an offset value of the amplitude of a proportional amplification signal is calculated by applying the operational amplifier AR2, the deviation value is equivalent to a resistor through a matching circuit consisting of a resistor R8, an inductor L8 and a capacitor C11, and is connected to the matching circuit at the input end of the operational amplifier AR1 in parallel, so that the amplification proportion of the operational amplifier AR1 is controlled, and finally the deviation value enters an output matching circuit, and after voltage stabilization, filtering and impedance matching, a non-attenuated signal is transmitted to a server of a big data power grid safety management information system;
the output matching circuit comprises a voltage regulator tube Z4 and an inductor L9, the negative electrode of the voltage regulator tube Z4 and the left end of the inductor L9 are connected with output signals of the variable resistance amplifying circuit, the right end of the inductor L9 is respectively connected with the left end of the inductor L10, one end of a capacitor C15 and one end of a capacitor C16, the right end of the inductor L10 is respectively connected with the other end of the capacitor C15 and the upper end of the resistor R13, the lower end of the resistor R13 is connected with the right end of the inductor L11, the positive electrode of the voltage regulator tube Z4, the other end of the capacitor C16 and the left end of the inductor L11 are all connected to the ground, and the right end of the inductor L10 is used for outputting signals of the matching circuit and transmitting the output signals;
the variable resistance amplifying circuit comprises an inductor L6 and a capacitor C9, the left end of the inductor L6 and one end of a grounded capacitor C9 are connected with a collector of a triode Q1, the right end of the inductor L6 is respectively connected with one end of a grounded capacitor C10 and the left end of an inductor L7, the right end of an inductor L7 is respectively connected with a non-inverting input end of an operational amplifier AR1, one end of a resistor R7 and one end of a transient suppression diode VD2, the inverting input end of the operational amplifier AR1 is respectively connected with one end of a grounded resistor R6 and a collector of a triode Q2, the output end of an operational amplifier AR1 is respectively connected with the other end of a resistor R7, the other end of a transient suppression diode VD2, one end of a resistor R11 and one end of a grounded capacitor C14, the other end of a resistor R11 is connected with a non-inverting input end of an operational amplifier AR2, the inverting input end of the operational amplifier AR2 is respectively connected with one end of a, the other end of the resistor R10 is connected with the output end of the operational amplifier AR2 and the anode of the capacitor C13 respectively, the cathode of the capacitor C13 is connected with one end of the capacitor C12, one end of the grounding resistor R9, one end of the resistor R8, one end of the inductor L8 and the non-inverting input end of the operational amplifier AR1 respectively, the other end of the resistor R8, the other end of the inductor L8 and the anode of the capacitor C11 are connected with +5V of a power supply, the cathode of the capacitor C11 is connected with the ground, and the other end of the capacitor C12 is connected with the left end of the inductor L6;
the interference suppression circuit comprises a capacitor C1, the cathode of the capacitor C1 receives a weak signal in a power grid large data transmission channel, the anode of the capacitor C1 is respectively connected with one end of an inductor L1 and the cathode of a capacitor C2, the anode of the capacitor C2 is connected with one end of an inductor L2, the other end of the inductor L2 is respectively connected with one end of an inductor L3 and one end of a capacitor CP1, the other end of the inductor L3 is respectively connected with one end of a transient suppression diode VD1, one end of a resistor R1, one end of a capacitor C3 and the base of a triode Q1, the other end of the inductor L1, the other end of the capacitor CP1 and the other end of the transient suppression diode VD1 are respectively connected with the base of the triode Q1, the other end of the capacitor C1 is connected with the anode of a thyristor VTL1, the other end of the resistor R1 is connected with the cathode of a voltage regulator Z1, the anode of the voltage regulator Z1 is respectively connected with one end of the capacitor C1 and the control pole of the, One end of a capacitor C5 and the other end of a capacitor C5 are connected with the ground, a collector of a triode Q1 is connected with one end of a capacitor C7 and one end of an inductor L4, the other end of a capacitor C7 is connected with one end of a resistor R2, a collector of a triode Q2 is connected with one end of a capacitor C8 and one end of an inductor L5, the other end of a capacitor C8 is connected with one end of a resistor R3, the other end of a resistor R2 and the other end of a resistor R3, the other end of the inductor L4 and the other end of the inductor L5 are both connected with +5V of a power supply, the collector of the triode Q1 is further connected with one end of a resistor R4, the other end of the resistor R4 is connected with one end of a ground resistor R5 and the base of the triode Q3 respectively, the collector of the triode Q3 is connected with the adjustable end of a potentiometer RW1, the left end of the potentiometer RW1 is connected with the emitter of the triode Q1, the right end of the potentiometer RW1 is connected with the emitter of the triode Q2, the emitter of the triode Q3 is connected with one end of a capacitor C6, and the other end of the capacitor C6 is connected with the base.
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|---|---|---|---|---|
| CN102545952B (en) * | 2012-01-20 | 2014-04-09 | 昆山创通微电子有限公司 | Wireless transceiver |
| CN103840800B (en) * | 2014-03-21 | 2016-06-01 | 航天科技控股集团股份有限公司 | Speed of a motor vehicle input Acquisition Circuit |
| CN104482945B (en) * | 2014-12-17 | 2017-05-17 | 许继集团有限公司 | Overvoltage protection and signal conditioning system for sensor |
| CN105631989A (en) * | 2015-12-19 | 2016-06-01 | 成都卡诺源科技有限公司 | Filter amplification circuit based voice recognition door control system |
| CN108664074B (en) * | 2018-07-03 | 2020-03-20 | 吉林大学 | Hospital environment monitoring system based on Internet of things |
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2018
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