CN112543013A - Smart city emergency command and dispatch internet communication platform - Google Patents
Smart city emergency command and dispatch internet communication platform Download PDFInfo
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- CN112543013A CN112543013A CN202011589417.8A CN202011589417A CN112543013A CN 112543013 A CN112543013 A CN 112543013A CN 202011589417 A CN202011589417 A CN 202011589417A CN 112543013 A CN112543013 A CN 112543013A
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
- H03H11/00—Networks using active elements
- H03H11/02—Multiple-port networks
- H03H11/04—Frequency selective two-port networks
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
- H03H11/00—Networks using active elements
- H03H11/02—Multiple-port networks
- H03H11/04—Frequency selective two-port networks
- H03H11/12—Frequency selective two-port networks using amplifiers with feedback
- H03H11/1217—Frequency selective two-port networks using amplifiers with feedback using a plurality of operational amplifiers
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
- H03H7/00—Multiple-port networks comprising only passive electrical elements as network components
- H03H7/38—Impedance-matching networks
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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
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
- H03H11/00—Networks using active elements
- H03H11/02—Multiple-port networks
- H03H11/04—Frequency selective two-port networks
- H03H2011/0477—Frequency selective two-port networks using current feedback operational amplifiers
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
- H03H11/00—Networks using active elements
- H03H11/02—Multiple-port networks
- H03H11/04—Frequency selective two-port networks
- H03H2011/0488—Notch or bandstop filters
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- Computer Networks & Wireless Communication (AREA)
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Abstract
The invention discloses a smart city emergency command and dispatch internet communication platform which comprises a remote transmission communication module, an instruction signal processing module and a server management platform, wherein the remote transmission communication module comprises a wireless signal receiver for receiving a remote communication emergency instruction, the instruction signal processing module comprises an instruction filtering and adjusting circuit, a notch feedback circuit and an amplitude modulation stabilizing circuit, and the filtering and adjusting circuit carries out frequency-selective filtering on signals after impedance matching by using a double-operational amplifier high-pass frequency-selective filter so as to well filter out the interference of the frequency-selective signals; the trap feedback circuit adds trap filtering regulation in the working process of the filtering regulation circuit to avoid spurious response caused by useless signals, and the amplitude modulation stabilizing circuit is used for stabilizing the amplitude of the output signal of the filtering regulation circuit and then sending the amplitude into the server management platform, so that the accuracy of the server management platform in receiving emergency instruction signals is ensured, and a timely and effective information communication platform is provided for scientific decision of urban emergency command and scheduling.
Description
Technical Field
The invention relates to the technical field of urban emergency command and dispatch, in particular to an intelligent urban emergency command and dispatch internet communication platform.
Background
Traffic is the core artery of a city and is also an important component of smart city construction. The intelligent transportation is based on intelligent transportation, technologies such as internet of things, cloud computing, internet, artificial intelligence, automatic control and mobile internet are fully applied in the transportation field, and traffic information is collected through high and new technologies, so that the intelligent transportation is used for traffic management, transportation, public trip and the like. The conventional intelligent city emergency command and dispatching system integrates various city emergency rescue forces and municipal service resources based on a real-time database and a high-speed three-dimensional integrated graphic engine, and establishes a highly intelligent city emergency command and dispatching system integrating communication, command and dispatching. The real-time accurate receiving and sending of emergency instructions are the basis for guaranteeing the orderly proceeding of command scheduling, and emergency instruction signals are greatly influenced by external factors in the remote receiving process, so that the receiver receives useless signals of other frequencies to cause stray response and distortion interference, the communication performance is reduced, the data error of the transmitted instruction signals is increased or even lost, and the stability and the safety of an emergency command scheduling system are seriously influenced.
The present invention provides a new solution to this problem.
Disclosure of Invention
In view of the above situation, the present invention provides an internet communication platform for emergency command and dispatch in smart cities to overcome the drawbacks of the prior art.
The technical scheme for solving the problem is as follows: a smart city emergency command and dispatch Internet communication platform comprises a remote communication module, an instruction signal processing module and a server management platform, wherein the remote communication module comprises a wireless signal receiver for receiving remote communication emergency instructions, the instruction signal processing module comprises an instruction filtering and adjusting circuit, a notch feedback circuit and an amplitude modulation stabilizing circuit, the filtering and adjusting circuit is used for carrying out frequency-selective filtering on output signals of the wireless signal receiver and comprises operational amplifiers AR1 and AR2, the non-inverting input end of the operational amplifier AR1 is connected with the signal output end of the wireless signal receiver through a resistor R1 and a capacitor C1 which are connected in parallel and is grounded through a resistor R2, the inverting input end of the operational amplifier AR1 is connected with the inverting input end of the operational amplifier AR2 and one end of a capacitor C3, and is connected with the output end of the operational amplifier AR1 and one end of a resistor R4 through a resistor R3 and a capacitor C2 which are connected in parallel, the other end of the resistor R4 is connected with the non-inverting input end of the operational amplifier AR2 and is grounded through a resistor R5, the output end of the operational amplifier AR2 is connected with the other end of the capacitor C3 and is connected with the non-inverting input end of the operational amplifier AR1 through a resistor R6; the notch feedback circuit is used for carrying out feedback regulation on an output signal of the operational amplifier AR1 and adding notch filtering regulation in the working process of the filtering regulation circuit; and the amplitude modulation stabilizing circuit is used for stabilizing the amplitude of the output signal of the filtering regulating circuit and then sending the amplitude stabilized output signal into the server management platform.
Further, the notch feedback circuit comprises a resistor R9 arranged between the non-inverting input end of the operational amplifier AR1 and the resistor R6, two ends of the resistor R9 are respectively connected with one ends of capacitors C6 and C7, the other ends of the capacitors C6 and C7 are respectively connected with two ends of a capacitor C5 and a rheostat RP1, the sliding end of the rheostat RP1 is connected with the output end of the operational amplifier AR3 and one end of a capacitor C4, the inverting input end of the operational amplifier AR3 is connected with the non-inverting input end of the capacitor C4, the non-inverting input end of the operational amplifier AR3 is connected with one ends of the resistors R7 and R8 and the cathode of the zener diode DZ1, the other end of the resistor R7 is connected with the output end of the operational amplifier AR1, and the other end of the resistor R63.
Furthermore, the amplitude modulation stabilizing circuit comprises a MOS tube Q1, the drain electrode of the MOS tube Q1 is connected with the output end of the operational amplifier AR1, the grid electrode of the MOS tube Q1 is connected with the cathode electrode of the voltage stabilizing diode DZ1, the output end of the operational amplifier AR1 is connected through a resistor R10, the source electrode of the MOS transistor Q1 is respectively connected with the emitter electrodes of the triodes T1 and T2 through resistors R11 and R12, the source of the MOS tube Q2 is connected with the drain of the MOS tube Q2 through a capacitor C8 and an inductor L1 which are connected in parallel, the bases of triodes T1 and T2 are connected with the collector of T1 and the cathode of a zener diode DZ1, the collector of a triode T2 is connected with the grid of the MOS tube Q2, one end of a resistor R13 and the base and the collector of a triode T3, the emitter of the triode T3 is connected with the grid of the MOS tube Q1, the anode of the zener diode DZ2 and the other end of a resistor R13 are grounded in parallel, the source of the MOS tube Q2 is grounded through a resistor R14, and is connected with the CPU instruction signal receiving end of the server management platform through a capacitor C9.
Through the technical scheme, the invention has the beneficial effects that:
1. according to the invention, a remote communication emergency instruction signal is received through a remote communication module, a filter regulating circuit forms an RC impedance network to perform impedance matching on the emergency instruction signal output by a wireless signal receiver, the high-frequency signal reflection generated by the emergency instruction signal on a transmission line is reduced, and then the signal after impedance matching is subjected to frequency-selecting filtering by using a dual-operational amplifier high-pass frequency-selecting filter, so that the interference of the mixed frequency signals of other frequency bands is well filtered;
2. the trap wave feedback circuit adds trap wave filtering regulation in the working process of the filtering regulation circuit, effectively avoids spurious response caused by useless signals, and simultaneously drives the tuning network to work by utilizing the operational amplifier following amplification feedback, so that the trap wave frequency characteristic of the tuning network is improved, and the distortion of a trap wave device is avoided;
3. the amplitude modulation stabilizing circuit eliminates ripple interference existing in the emergency command signal, and then accurate filtering in an output stage is carried out on the emergency command signal by utilizing an LC parallel resonance principle, self-excitation interference generated in the circuit is well eliminated, and the accuracy of receiving the emergency command signal by the server management platform is ensured.
Drawings
FIG. 1 is a circuit schematic of the command filter conditioning circuit of the present invention.
FIG. 2 is a schematic circuit diagram of an instruction signal processing module according to 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 2. 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.
An intelligent city emergency command and dispatch internet communication platform comprises a remote transmission communication module, an instruction signal processing module and a server management platform. The remote transmission communication module comprises a wireless signal receiver for receiving a remote communication emergency instruction, the instruction signal processing module comprises an instruction filtering and adjusting circuit, a notch feedback circuit and an amplitude modulation stabilizing circuit, wherein the filtering and adjusting circuit is used for performing frequency-selecting filtering on an output signal of the wireless signal receiver, the notch feedback circuit is used for performing feedback adjustment on the output signal of the filtering and adjusting circuit and adding notch filtering adjustment in the working process of the filtering and adjusting circuit, and the amplitude modulation stabilizing circuit is used for stabilizing the amplitude of the output signal of the filtering and adjusting circuit and then sending the amplitude into the server management platform.
As shown in fig. 1, the specific structure of the command filtering and adjusting circuit includes operational amplifiers AR1 and AR2, a non-inverting input terminal of the operational amplifier AR1 is connected to a signal output terminal of the wireless signal receiver through a resistor R1 and a capacitor C1 which are connected in parallel, and is grounded through a resistor R2, an inverting input terminal of the operational amplifier AR1 is connected to an inverting input terminal of the operational amplifier AR2 and one end of a capacitor C3, and is connected to an output terminal of the operational amplifier AR1 and one end of a resistor R4 through a resistor R3 and a capacitor C2 which are connected in parallel, the other end of the resistor R4 is connected to a non-inverting input terminal of the operational amplifier AR2 and is grounded through a resistor R5, and an output terminal of the operational amplifier AR2 is connected to the other end of a capacitor C3, and is connected.
During the working process of the command filtering and adjusting circuit, an RC impedance network formed by resistors R1 and R2 and a capacitor C1 is adopted to carry out impedance matching on an emergency command signal output by the wireless signal receiver, so that the high-frequency signal reflection generated by the emergency command signal on a transmission line is reduced. Then, the operational amplifiers AR1 and AR2 form a dual operational amplifier high-pass frequency-selective filter to process the signals after impedance matching, wherein the resistor R3, the capacitor C2, the resistor R6 and the capacitor C3 form a second-order RC high-pass filter network, and the center frequency band of the second-order RC high-pass filter network is consistent with the frequency of the emergency command signal, so that the emergency command signal can pass through the second-order RC high-pass filter network, and the interference of the spurious signals of other frequency bands can be well filtered.
Because the instruction filtering adjusting circuit can not completely eliminate the noise signals adjacent to the emergency instruction signal frequency during frequency-selective filtering, the transmission quality of communication interference caused by harmful signals still exists. In order to further eliminate the influence of useless signals, the notch feedback circuit adds notch filtering regulation in the working process of the filtering regulation circuit, as shown in fig. 2, the specific structure of the notch feedback circuit comprises a resistor R9 arranged between the non-inverting input end of an operational amplifier AR1 and a resistor R6, two ends of the resistor R9 are respectively connected with one ends of capacitors C6 and C7, the other ends of capacitors C6 and C7 are respectively connected with two ends of a capacitor C5 and a rheostat RP1, the sliding end of the rheostat RP1 is connected with the output end of the operational amplifier AR3 and one end of a capacitor C4, the inverting input end of the operational amplifier AR3 is connected with the non-inverting input end of the capacitor C4, the non-inverting input end of the operational amplifier AR3 is connected with one ends of resistors R7 and R8 and the cathode of a zener diode DZ1, the other end of the resistor R7 is connected with the output end of the operational amplifier AR 1.
The resistor R9, the rheostat RP1 and the capacitors C5-C7 form a tuning network to suppress noise signals existing in the command filtering and adjusting circuit, and stray response caused by useless signals is effectively avoided. Because the resistance-capacitance oscillation can fluctuate corresponding to an emergency command signal in the tuning trap process, the resistors R7 and R8 sample and divide the voltage of an output signal of the operational amplifier AR1 by utilizing a series voltage division principle, then the sampled voltage is sent into the operational amplifier AR3 to be followed and amplified, the voltage stabilizing diode DZ1 has a reference amplitude stabilizing effect on the input of the sampled and divided voltage, the feedback signal output by the operational amplifier AR3 is ensured to have a good stabilizing effect when the operational tuning network is driven to work, meanwhile, the capacitor C4 plays a role in compensating and stabilizing the output signal of the operational amplifier AR3, the trap frequency characteristic of the tuning network is further improved, and the distortion of a trap is avoided. The resistance value of the rheostat RP1 is adjusted to change the center frequency of the tuning network, so that harmful noise of a specific frequency can be accurately trapped and filtered in the actual use process.
Ripple interference still exists in the emergency command signal after filtering adjustment and notch feedback, so that the influence is eliminated by adopting an amplitude modulation stabilizing circuit. The amplitude modulation stabilizing circuit comprises a MOS tube Q1, the drain of the MOS tube Q1 is connected with the output end of an operational amplifier AR1, the gate of the MOS tube Q1 is connected with the cathode of a voltage stabilizing diode DZ1, and is connected with the output end of the operational amplifier AR1 through a resistor R10, the source of the MOS tube Q1 is connected with the emitters of a triode T12 and a T12 through resistors R11 and R12 respectively, and is connected with the drain of the MOS tube Q12 through a capacitor C12 and an inductor L12 which are connected in parallel, the bases of the triodes T12 and T12 are connected with the collector of the T12 and the cathode of the voltage stabilizing diode DZ 12, the collector of the triode T12 is connected with the gate of the MOS tube Q12, one end of the resistor R12 and the base and the collector of the triode T12, the emitter of the triode T12 is connected with the gate of the MOS tube Q12, the anode of the voltage stabilizing diode DZ 12 is connected with the other end of the ground, and is connected with the CPU command management platform through the capacitor C12.
Firstly, the MOS transistor Q1 utilizes its good temperature characteristic to improve the waveform of the output signal of the operational amplifier AR1, and the output signal is divided into two paths and sent to the current regulator composed of the triodes T1 and T2 for processing. The triode T1 is used as a regulating tube of the T2 to perform feedback regulation on the change of the current on the resistor R13 to restrain the variable quantity, and the voltage stabilizing diode DZ2 is used for performing temperature compensation on the base electrode potential of the triode T1 to ensure the stability of the output current of the current stabilizer. Part of the output current of the current regulator is fed back to the grid electrode of the MOS tube Q1 through the triode T3, so that the stability of the output signal of the MOS tube Q1 is further improved, and the ripple interference is eliminated. Meanwhile, the output signal of the current stabilizer is amplified by the MOS tube Q2, LC parallel resonance is formed by the capacitor C8 and the inductor L1 in the working process of the MOS tube Q2, accurate filtering is carried out on the output stage of the emergency command signal corresponding to the LC parallel resonance, self-excitation interference generated inside the circuit is well eliminated, the accuracy of outputting the emergency command signal is improved, and finally the emergency command signal is coupled by the capacitor C9 and then sent to a server management platform.
The specific working process and principle of the invention are as follows: the remote communication emergency command signal is received by the remote communication module, and the command signal processing module is designed to regulate the emergency command signal. Firstly, a filter adjusting circuit forms an RC impedance network to carry out impedance matching on an emergency instruction signal output by a wireless signal receiver, high-frequency signal reflection generated by the emergency instruction signal on a transmission line is reduced, then a dual-operational amplifier high-pass frequency-selecting filter is used for carrying out frequency-selecting filtering on the signal after impedance matching, and the interference of the mixed frequency signals of other frequency bands is well filtered. In order to further eliminate the influence of the useless signals, the trap wave feedback circuit adds trap wave filtering adjustment in the working process of the filtering adjustment circuit, thereby effectively avoiding the spurious response caused by the useless signals, and simultaneously, the operational amplifier is used for driving the tuning network to work along with the amplification feedback, thereby improving the trap frequency characteristic of the tuning network and avoiding the distortion of the trap wave filter. An amplitude modulation stabilizing circuit is adopted to eliminate ripple interference existing in the emergency instruction signal, then the LC parallel resonance principle is utilized to carry out accurate filtering of an output stage on the emergency instruction signal, self-excitation interference generated in the circuit is well eliminated, and the accuracy of receiving the emergency instruction signal by a server management platform is ensured.
The server management platform identifies and processes emergency instruction signals through an upper computer CPU, and utilizes a mature internet data integration technology to realize multi-police, multi-department, multi-level and cross-region unified alarm receiving, unified commanding and combined action, timely, orderly and efficiently carry out emergency rescue or emergency rescue and disaster relief actions, and provide a timely and effective information communication platform for scientific decision of urban emergency command and dispatch.
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. The utility model provides an emergent commander dispatch internet communication platform in wisdom city, includes teletransmission communication module, instruction signal processing module and server management platform, its characterized in that: the remote communication module comprises a wireless signal receiver for receiving a remote communication emergency instruction, the instruction signal processing module comprises an instruction filtering and adjusting circuit, a notch feedback circuit and an amplitude modulation stabilizing circuit, the filtering and adjusting circuit is used for carrying out frequency-selecting filtering on an output signal of the wireless signal receiver and comprises operational amplifiers AR1 and AR2, a non-inverting input end of an operational amplifier AR1 is connected with a signal output end of the wireless signal receiver through a resistor R1 and a capacitor C1 which are connected in parallel and is grounded through a resistor R2, a non-inverting input end of the operational amplifier AR1 is connected with a non-inverting input end of an operational amplifier AR2 and one end of a capacitor C3 and is connected with an output end of an operational amplifier AR1 and one end of a resistor R4 through a resistor R3 and a capacitor C2 which are connected in parallel, the other end of the resistor R38 is connected with a non-inverting input end of the operational amplifier AR2 and is grounded through a resistor R5, and an output end of the operational, the non-inverting input end of the operational amplifier AR1 is connected with the resistor R6;
the notch feedback circuit is used for carrying out feedback regulation on an output signal of the operational amplifier AR1 and adding notch filtering regulation in the working process of the filtering regulation circuit; and the amplitude modulation stabilizing circuit is used for stabilizing the amplitude of the output signal of the filtering regulating circuit and then sending the amplitude stabilized output signal into the server management platform.
2. The intelligent city emergency command and dispatch internet communication platform of claim 1, wherein: the trap feedback circuit comprises a resistor R9 arranged between a non-inverting input end of an operational amplifier AR1 and a resistor R6, two ends of the resistor R9 are respectively connected with one ends of capacitors C6 and C7, the other ends of the capacitors C6 and C7 are respectively connected with two ends of a capacitor C5 and a rheostat RP1, a sliding end of the rheostat RP1 is connected with an output end of the operational amplifier AR3 and one end of a capacitor C4, an inverting input end of the operational amplifier AR3 is connected with a non-inverting input end of an operational amplifier AR3 at the other end of the capacitor C4 and is connected with one ends of resistors R7 and R8 and a cathode of a voltage stabilizing diode DZ1, the other end of the resistor R7 is connected with an output end of the operational amplifier AR1, and the other end of the resistor R8.
3. The intelligent city emergency command and dispatch internet communication platform of claim 2, wherein: the amplitude modulation stabilizing circuit comprises a MOS tube Q1, the drain electrode of the MOS tube Q1 is connected with the output end of the operational amplifier AR1, the grid electrode of the MOS tube Q1 is connected with the cathode electrode of a voltage stabilizing diode DZ1, the output end of the operational amplifier AR1 is connected through a resistor R10, the source electrode of the MOS transistor Q1 is respectively connected with the emitter electrodes of the triodes T1 and T2 through resistors R11 and R12, the source of the MOS tube Q2 is connected with the drain of the MOS tube Q2 through a capacitor C8 and an inductor L1 which are connected in parallel, the bases of triodes T1 and T2 are connected with the collector of T1 and the cathode of a zener diode DZ1, the collector of a triode T2 is connected with the grid of the MOS tube Q2, one end of a resistor R13 and the base and the collector of a triode T3, the emitter of the triode T3 is connected with the grid of the MOS tube Q1, the anode of the zener diode DZ2 and the other end of a resistor R13 are grounded in parallel, the source of the MOS tube Q2 is grounded through a resistor R14, and is connected with the CPU instruction signal receiving end of the server management platform through a capacitor C9.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202011589417.8A CN112543013A (en) | 2020-12-29 | 2020-12-29 | Smart city emergency command and dispatch internet communication platform |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202011589417.8A CN112543013A (en) | 2020-12-29 | 2020-12-29 | Smart city emergency command and dispatch internet communication platform |
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| CN112543013A true CN112543013A (en) | 2021-03-23 |
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| CN202011589417.8A Withdrawn CN112543013A (en) | 2020-12-29 | 2020-12-29 | Smart city emergency command and dispatch internet communication platform |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113095983A (en) * | 2021-04-14 | 2021-07-09 | 南京静旭机电科技有限公司 | Information data receiving and transmitting management platform based on big data |
| CN114859995A (en) * | 2022-04-21 | 2022-08-05 | 史丹利化肥宁陵有限公司 | Automatic temperature control system for urea melt guniting granulation production |
-
2020
- 2020-12-29 CN CN202011589417.8A patent/CN112543013A/en not_active Withdrawn
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113095983A (en) * | 2021-04-14 | 2021-07-09 | 南京静旭机电科技有限公司 | Information data receiving and transmitting management platform based on big data |
| CN114859995A (en) * | 2022-04-21 | 2022-08-05 | 史丹利化肥宁陵有限公司 | Automatic temperature control system for urea melt guniting granulation production |
| CN114859995B (en) * | 2022-04-21 | 2024-06-04 | 史丹利化肥宁陵有限公司 | Automatic temperature control system for urea melting, slurry spraying and granulating production |
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