CN111697929A - Rail transit internet of things node control system - Google Patents
Rail transit internet of things node control system Download PDFInfo
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- CN111697929A CN111697929A CN202010604881.3A CN202010604881A CN111697929A CN 111697929 A CN111697929 A CN 111697929A CN 202010604881 A CN202010604881 A CN 202010604881A CN 111697929 A CN111697929 A CN 111697929A
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03F—AMPLIFIERS
- H03F1/00—Details of amplifiers with only discharge tubes, only semiconductor devices or only unspecified devices as amplifying elements
- H03F1/26—Modifications of amplifiers to reduce influence of noise generated by amplifying elements
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03F—AMPLIFIERS
- H03F1/00—Details of amplifiers with only discharge tubes, only semiconductor devices or only unspecified devices as amplifying elements
- H03F1/30—Modifications of amplifiers to reduce influence of variations of temperature or supply voltage or other physical parameters
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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
- H04L67/125—Protocols specially adapted for proprietary or special-purpose networking environments, e.g. medical networks, sensor networks, networks in vehicles or remote metering networks involving control of end-device applications over a network
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Abstract
The invention discloses a rail transit Internet of things node control system, which comprises a signal sampling module and a comparison detection module, wherein the signal sampling module samples signals output by a rail transit Internet of things node, the output port of the signal sampling module is connected with the input port of the comparison detection module, the fault of the Internet of things node causes signal abnormality, an operational amplifier AR3 outputs high-level signals, the operational amplifier AR3 and a capacitor C7-C9 are used for reducing noise of the signals to ensure the accuracy of the signals, finally a peak value signal in the signals is screened by a peak value detection circuit consisting of the operational amplifier AR5, a diode D7 and a diode D8, a peak value signal emitter E1 is triggered to work, in order to further improve the precision of the trigger signal, the thyristor D9 is used for detecting the reverse phase input end positions of the operational amplifier AR2 and the operational amplifier AR3 to finely adjust the trigger signal of the signal emitter E1, the rail transit Internet of things node control system terminal receives the Internet of things node information in time and responds in time.
Description
Technical Field
The invention relates to the technical field of Internet of things, in particular to a node control system of the Internet of things of rail transit.
Background
In recent years, with the rapid development of urban modern construction, urban rail transit is gradually and comprehensively entering the networking operation era. The traffic capacity and the travel convenience are greatly improved, and meanwhile, new problems and challenges are brought to operation scheduling. Under the conditions of networked operation and seamless transfer, the travel routes of passengers are more diversified, and with the rapid development of urban modern construction, rail transit gradually and comprehensively enters the networked era. In a rail transit system, a rail transit internet of things node control system is a cornerstone for safe and efficient operation of the rail transit internet of things node control system.
At present, among a plurality of information communication transmission technologies, the Zigbee technology based on the IEEE802.15.4 wireless standard has the advantages of low price, low power consumption, high data transmission reliability, large network capacity, small time delay, strong compatibility, high safety, low realization cost, compact and simple protocol suite, the management of the sensor nodes is also convenient, and the like, and is widely applied to the industrial field, but the signal transmission of the rail transit internet of things nodes is influenced by the noisy environment of rail transit, especially the information interaction between the rail transit internet of things nodes and the nodes, once one node fails, the information is wrong, and the analysis result of the whole control system is greatly deviated, the system starting time can be seriously delayed for troubleshooting of a certain node fault, the system misjudgment can be caused for node sampling information in a noisy rail transit environment, and the loss which is difficult to estimate is brought to a rail transit Internet of things node control system.
Disclosure of Invention
In view of the above situation, in order to overcome the defects of the prior art, the present invention provides a node control system for a rail transit internet of things, which can sample and detect an output signal of a node of the rail transit internet of things and feed the signal back to a terminal of the node control system for the rail transit internet of things.
The rail transit Internet of things node control system comprises a signal sampling module and a comparison detection module, wherein the signal sampling module samples output signals of the rail transit Internet of things node, an output port of the signal sampling module is connected with an input port of the comparison detection module, and output signals of the comparison detection module are sent to a rail transit Internet of things node control system terminal through a signal emitter E1;
the comparison detection module comprises an operational amplifier AR2, wherein an inverting input terminal of the operational amplifier AR2 is connected with a capacitor C2, one end of the capacitor C2, an anode of a thyristor D2, one end of a resistor R2 and a control electrode of the thyristor D2, the other end of the capacitor C2 is connected with a non-inverting input terminal of an inductor L2 and a non-inverting input terminal of the operational amplifier AR2, the other end of the capacitor C2 is connected with one end of the resistor R2, the other ends of the resistor R2 and the inductor L2 are grounded, the inverting input terminal of the operational amplifier AR2 is connected with a cathode of the resistor D2, an anode of the resistor D2 and one end of the resistor R2, a cathode of a diode D2, the control electrode of the thyristor D2 is connected with the other end of the resistor R2 and one end of the resistor R2, the other end of the resistor R2 and the other end of the capacitor C2 are grounded, the other end of the resistor R2 is connected with a cathode of a variable resistor RW 2, an upper end of the variable resistor D2 is connected with an anode of the thyristor D2, and a, the cathode of the diode D4 is connected to the anode of the diode D3 and the terminal of the capacitor C4, the other terminal of the capacitor C5 and the internet of things node rated signal input port, the output terminal of the operational amplifier AR5 is connected to one terminal of the resistor R5, the other terminal of the resistor R5 is connected to the resistor R5, one terminal of the capacitor C5 and the non-inverting input terminal of the operational amplifier AR5, the other terminal of the resistor R5 is connected to one terminal of the resistor R5 and the capacitor C5, the other terminal of the capacitor C5 is connected to one terminal of the capacitor C5, the other terminals of the resistor R5 and the capacitor C5 are connected to ground, the inverting input terminal of the operational amplifier AR5 is connected to ground, the output terminal of the operational amplifier AR5 is connected to the other terminal of the resistor R5 and the other terminal of the capacitor C5 and one terminal of the resistor R5, the other terminal of the resistor R5 is connected to the non-inverting input terminal of the operational amplifier AR5, the inverting input terminal of the resistor R5 is connected to ground, the inverting input terminal of the, the anode of the diode D6 is connected with the anode of the diode D5 and the cathode of the controllable silicon D9, the output end of the operational amplifier AR5 is connected with the cathode of the diode D7 and the anode of the diode D8, and the cathode of the diode D8 is connected with the signal transmitter E1.
Due to the adoption of the technical scheme, compared with the prior art, the invention has the following advantages;
1. in order to ensure the accuracy of the comparison detection signal, an operational amplifier AR2 is used for buffering the output signal of the signal sampling module, then an inductor L2, a capacitor C1 and a capacitor C2 are used for forming an oscillating circuit to enhance the signal frequency, the anti-interference performance of the signal is improved, in order to ensure the accuracy of the signal of the in-phase input end of the operational amplifier AR3, a thyristor D2 is used for detecting a peak signal in the output signal of the operational amplifier AR2, the peak signal is fed back to the anti-phase input end of the operational amplifier AR3 by utilizing the conducting voltage of the thyristor D2, the effect of the peak signal in the in-phase input end of the operational amplifier AR3 is;
2. the method comprises the steps that a signal is abnormal due to node faults of the Internet of things, an operational amplifier AR3 outputs a high-level signal at the moment, the operational amplifier AR3 and a capacitor C7-a capacitor C9 are used for reducing noise of the signal, the accuracy of the signal is guaranteed, finally, a peak value signal in the signal is screened by a peak value detection circuit consisting of the operational amplifier AR5, a diode D7 and a diode D8, a peak value signal emitter E1 is triggered to work, in order to further improve the accuracy of the trigger signal, the potentials of the operational amplifier AR2 and the reverse-phase input end of the operational amplifier AR3 are detected by the aid of a thyristor D9, the trigger signal of the signal emitter E1 is finely adjusted, and the Internet of things node control system terminal of the rail transit Internet of.
Drawings
Fig. 1 is a schematic diagram of a comparison detection module of a rail transit internet of things node control system according to the present invention.
Fig. 2 is a schematic diagram of a signal sampling module of the rail transit internet of things node control system of the invention.
Detailed Description
The foregoing and other aspects, features and advantages of the invention will be apparent from the following more particular description of embodiments of the invention, as illustrated in the accompanying drawings in which reference is made to figures 1-2. The structural contents mentioned in the following embodiments are all referred to the attached drawings of the specification.
The rail transit Internet of things node control system comprises a signal sampling module and a comparison detection module, wherein the signal sampling module samples output signals of rail transit Internet of things nodes, an output port of the signal sampling module is connected with an input port of the comparison detection module, and output signals of the comparison detection module are sent to a rail transit Internet of things node control system terminal through a signal emitter E1;
in order to solve the problems of Internet of things fault node detection and information transmission noise interference in a rail transit Internet of things node control system, a signal sampling module is required to select a signal sampler J1 with the model of DAM-3056AH to sample signals output by the rail transit Internet of things node, and because the sampled signal power is low, an operational amplifier AR1 is required to amplify the signal power to ensure the signal strength, and then a comparison detection module is used to detect and calibrate the signals output by the signal sampling module;
the comparison detection module needs to use an operational amplifier AR3 to compare an internet-of-things node rated signal with a signal sampling module output signal, in order to ensure the accuracy of the comparison detection signal, the operational amplifier AR2 is used to buffer the signal output by the signal sampling module, then an oscillating circuit consisting of an inductor L2, a capacitor C1 and a capacitor C2 is used to enhance the signal frequency, the anti-interference performance of the signal is improved, in order to ensure the accuracy of a signal at a non-inverting input end of the operational amplifier AR3, a thyristor D2 is used to detect a spike signal in the output signal of the operational amplifier AR2, a thyristor D2 is used to feed back the spike signal to an inverting input end of the operational amplifier AR3, the spike signal at the non-inverting input end of the operational amplifier AR3 is eliminated, a resistor R6 plays a role in pulling down voltage, in order to detect whether the signal is abnormal, the internet-of, The diode D4 forms a rectifying circuit to rectify the signal, and then the rectified signal can be input into the inverting input end of the operational amplifier AR3, so that the stability of the input signal is ensured, if the signal is normal, the potential difference between the operational amplifier AR3 and the low-level signal is not large, the operational amplifier AR3 outputs a low-level signal, and the signal transmitter E1 cannot be triggered to work, otherwise, the node fault of the Internet of things causes signal abnormality, at this time, the operational amplifier AR3 outputs a high-level signal, and simultaneously, the operational amplifier AR3 and the capacitor C7-capacitor C9 are used for noise reduction of the signal, so that the accuracy of the signal is ensured, the capacitor C9 is a decoupling capacitor, so that the signal noise ratio output by the operational amplifier AR4 is reduced, the capacitor C7 filters a direct-current high-frequency component in the signal, the capacitor C8 is a bypass capacitor, so as to filter noise interference in the signal, and finally, a peak detection circuit formed by, in order to further improve the precision of the trigger signal, the controlled silicon D9 is used for detecting the potentials of the reverse phase input ends of the operational amplifier AR2 and the operational amplifier AR3, the situation that the difference between the potentials of the two signals is too large and the circuit is damaged is prevented, a signal is fed back to the reverse phase input end of the operational amplifier AR5, the trigger signal of the signal transmitter E1 is subjected to fine adjustment, and the rail transit Internet of things node control system terminal receives the Internet of things node information in time and responds in time.
The specific structure of the comparison detection module includes that an inverting input terminal of an operational amplifier AR2 is connected with a capacitor C1, one end of a capacitor C2, an anode of a thyristor D2, one end of a resistor R2 and a control electrode of a thyristor D2, the other end of the capacitor C2 is connected with one end of an inductor L2 and a non-inverting input terminal of the operational amplifier AR2, the other end of the capacitor C2 is connected with one end of the resistor R2, the other ends of the resistor R2 and the inductor L2 are grounded, the inverting input terminal of the operational amplifier AR2 is connected with a cathode of the thyristor D2, an anode of the thyristor D2 and one end of the resistor R2, a cathode of a diode D2, a control electrode of the thyristor D2 is connected with the other end of the resistor R2 and one end of the capacitor C2, the other ends of the resistor R2 and the cathode of the capacitor RW 2 are connected with a sliding end of a variable resistor RW 2, and a cathode of an upper electrode of the variable diode D2 of the variable resistor D2 and a lower end of the capacitor RW 2 are connected with a lower end of the, the cathode of the diode D4 is connected to the anode of the diode D3 and the terminal of the capacitor C4, the other terminal of the capacitor C5 and the internet of things node rated signal input port, the output terminal of the operational amplifier AR5 is connected to one terminal of the resistor R5, the other terminal of the resistor R5 is connected to the resistor R5, one terminal of the capacitor C5 and the non-inverting input terminal of the operational amplifier AR5, the other terminal of the resistor R5 is connected to one terminal of the resistor R5 and the capacitor C5, the other terminal of the capacitor C5 is connected to one terminal of the capacitor C5, the other terminals of the resistor R5 and the capacitor C5 are connected to ground, the inverting input terminal of the operational amplifier AR5 is connected to ground, the output terminal of the operational amplifier AR5 is connected to the other terminal of the resistor R5 and the other terminal of the capacitor C5 and one terminal of the resistor R5, the other terminal of the resistor R5 is connected to the non-inverting input terminal of the operational amplifier AR5, the inverting input terminal of the resistor R5 is connected to ground, the inverting input terminal of the, the anode of the diode D6 is connected with the anode of the diode D5 and the cathode of the controllable silicon D9, the output end of the operational amplifier AR5 is connected with the cathode of the diode D7 and the anode of the diode D8, and the cathode of the diode D8 is connected with the signal transmitter E1.
The signal sampling module comprises a signal sampler J1 with the model of DAM-3056AH, the signal sampler J1 collects signals output by the nodes of the rail transit Internet of things, the power end of the signal sampler J1 is connected with + 5V, the grounding end of the signal sampler J1 is grounded, the output end of the signal sampler J1 is connected with the negative electrode of a voltage stabilizing tube D1 and the non-inverting input end of an operational amplifier AR1, the inverting input end of the operational amplifier AR1 is connected with one end of a resistor R1 and a resistor R2, the other end of the resistor R1 is grounded, the output end of the operational amplifier AR1 is connected with the other end of a resistor R2, one end of a resistor R3 and the input port of the comparison detection module, and the.
When the invention is used specifically, the rail transit Internet of things node control system comprises a signal sampling module and a comparison detection module, wherein the signal sampling module samples an output signal of a rail transit Internet of things node, an output port of the signal sampling module is connected with an input port of the comparison detection module, the output signal of the comparison detection module is sent to a terminal of the rail transit Internet of things node control system through a signal transmitter E1, an operational amplifier AR3 is needed to be used by the comparison detection module to compare a rated signal of the Internet of things node with the output signal of the signal sampling module, in order to ensure the accuracy of the comparison detection signal, the operational amplifier AR2 is used to buffer the output signal of the signal sampling module, then an inductor L2, a capacitor C1 and a capacitor C2 are used to form an oscillating circuit to enhance the signal frequency, the anti-interference performance of the signal is improved, in order to ensure the accuracy of a signal at a same-phase input end of an operational amplifier AR, the on-state voltage of the thyristor D2 is used for feeding back a spike signal to the inverting input end of the operational amplifier AR3, the action of a spike signal in the non-inverting input end of the operational amplifier AR3 is eliminated, the resistor R6 plays a role of pulling down voltage, in order to detect whether the signal is abnormal or not, a rated signal of an Internet of things node needs to be input to the inverting input end of the operational amplifier AR3, a rectifying circuit consisting of the variable resistor RW1, the diode D3 and the diode D4 is used for rectifying the signal, then the signal is input to the inverting input end of the operational amplifier AR3, the stability of the input signal is ensured, if the signal is normal, the potential difference between the two is not large, the operational amplifier AR3 outputs a low-level signal and cannot trigger the signal transmitter E1 to work, otherwise, the fault of the node of the Internet of things causes the signal to be abnormal, the operational amplifier AR3 outputs a high, the capacitor C9 is a decoupling capacitor, the signal noise ratio output by the operational amplifier AR4 is reduced, the direct-current high-frequency component in the signal is filtered by the capacitor C7, the capacitor C8 is a bypass capacitor, noise interference in the signal is filtered, finally, a peak detection circuit consisting of the operational amplifier AR5, a diode D7 and a diode D8 is used for screening a peak signal in the signal, the peak signal is used for triggering the signal transmitter E1 to work, in order to further improve the accuracy of the triggering signal, the potentials of the reverse phase input ends of the operational amplifier AR2 and the operational amplifier AR3 are detected by the thyristor D9, the situation that the signal potentials of the two are too large in difference and the circuit is damaged is prevented, the signal is fed back to the reverse phase input end of the operational amplifier AR5, the triggering signal of the signal transmitter E1 is subjected to fine adjustment, and the node.
While the invention has been described in further detail with reference to specific embodiments thereof, it is not intended that the invention be limited to the specific embodiments thereof; for those skilled in the art to which the present invention pertains and related technologies, the extension, operation method and data replacement should fall within the protection scope of the present invention based on the technical solution of the present invention.
Claims (2)
1. A rail transit Internet of things node control system is characterized by comprising a signal sampling module and a comparison detection module, wherein the signal sampling module samples output signals of rail transit Internet of things nodes, an output port of the signal sampling module is connected with an input port of the comparison detection module, and output signals of the comparison detection module are sent into a rail transit Internet of things node control system terminal through a signal emitter E1;
the comparison detection module comprises an operational amplifier AR2, wherein an inverting input terminal of the operational amplifier AR2 is connected with a capacitor C2, one end of the capacitor C2, an anode of a thyristor D2, one end of a resistor R2 and a control electrode of the thyristor D2, the other end of the capacitor C2 is connected with a non-inverting input terminal of an inductor L2 and a non-inverting input terminal of the operational amplifier AR2, the other end of the capacitor C2 is connected with one end of the resistor R2, the other ends of the resistor R2 and the inductor L2 are grounded, the inverting input terminal of the operational amplifier AR2 is connected with a cathode of the resistor D2, an anode of the resistor D2 and one end of the resistor R2, a cathode of a diode D2, the control electrode of the thyristor D2 is connected with the other end of the resistor R2 and one end of the resistor R2, the other end of the resistor R2 and the other end of the capacitor C2 are grounded, the other end of the resistor R2 is connected with a cathode of a variable resistor RW 2, an upper end of the variable resistor D2 is connected with an anode of the thyristor D2, and a, the cathode of the diode D4 is connected to the anode of the diode D3 and the terminal of the capacitor C4, the other terminal of the capacitor C5 and the internet of things node rated signal input port, the output terminal of the operational amplifier AR5 is connected to one terminal of the resistor R5, the other terminal of the resistor R5 is connected to the resistor R5, one terminal of the capacitor C5 and the non-inverting input terminal of the operational amplifier AR5, the other terminal of the resistor R5 is connected to one terminal of the resistor R5 and the capacitor C5, the other terminal of the capacitor C5 is connected to one terminal of the capacitor C5, the other terminals of the resistor R5 and the capacitor C5 are connected to ground, the inverting input terminal of the operational amplifier AR5 is connected to ground, the output terminal of the operational amplifier AR5 is connected to the other terminal of the resistor R5 and the other terminal of the capacitor C5 and one terminal of the resistor R5, the other terminal of the resistor R5 is connected to the non-inverting input terminal of the operational amplifier AR5, the inverting input terminal of the resistor R5 is connected to ground, the inverting input terminal of the, the anode of the diode D6 is connected with the anode of the diode D5 and the cathode of the controllable silicon D9, the output end of the operational amplifier AR5 is connected with the cathode of the diode D7 and the anode of the diode D8, and the cathode of the diode D8 is connected with the signal transmitter E1.
2. The rail transit internet-of-things node control system as claimed in claim 1, wherein the signal sampling module comprises a signal sampler J1 with model number of DAM-3056AH, the signal sampler J1 collects output signals of a rail transit internet-of-things node, a power supply end of the signal sampler J1 is connected with + 5V, a grounding end of the signal sampler J1 is grounded, an output end of the signal sampler J1 is connected with a negative electrode of a voltage regulator tube D1 and a non-inverting input end of an operational amplifier AR1, an inverting input end of the operational amplifier AR1 is connected with one end of a resistor R1 and a resistor R2, the other end of a resistor R1 is grounded, an output end of the operational amplifier AR1 is connected with the other end of a resistor R2, one end of a resistor R3 and an input port of the comparison detection module.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010604881.3A CN111697929A (en) | 2020-06-29 | 2020-06-29 | Rail transit internet of things node control system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010604881.3A CN111697929A (en) | 2020-06-29 | 2020-06-29 | Rail transit internet of things node control system |
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| CN111697929A true CN111697929A (en) | 2020-09-22 |
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| CN202010604881.3A Withdrawn CN111697929A (en) | 2020-06-29 | 2020-06-29 | Rail transit internet of things node control system |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111859459A (en) * | 2020-07-31 | 2020-10-30 | 唐有钢 | Block chain data security management platform |
| CN112187234A (en) * | 2020-11-02 | 2021-01-05 | 南京绿瞬电子科技有限公司 | Vehicle positioning monitoring system based on Internet of things |
| CN112954724A (en) * | 2021-04-29 | 2021-06-11 | 沸蓝建设咨询有限公司 | 5G basic station construction engineering monitoring system |
| CN113364537A (en) * | 2021-06-02 | 2021-09-07 | 沸蓝建设咨询有限公司 | Internet of things monitoring system based on 5G communication |
-
2020
- 2020-06-29 CN CN202010604881.3A patent/CN111697929A/en not_active Withdrawn
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111859459A (en) * | 2020-07-31 | 2020-10-30 | 唐有钢 | Block chain data security management platform |
| CN112187234A (en) * | 2020-11-02 | 2021-01-05 | 南京绿瞬电子科技有限公司 | Vehicle positioning monitoring system based on Internet of things |
| CN112187234B (en) * | 2020-11-02 | 2021-04-23 | 地上铁租车（深圳）有限公司 | Vehicle positioning monitoring system based on Internet of things |
| CN112954724A (en) * | 2021-04-29 | 2021-06-11 | 沸蓝建设咨询有限公司 | 5G basic station construction engineering monitoring system |
| CN112954724B (en) * | 2021-04-29 | 2022-08-02 | 沸蓝建设咨询有限公司 | 5G basic station construction engineering monitoring system |
| CN113364537A (en) * | 2021-06-02 | 2021-09-07 | 沸蓝建设咨询有限公司 | Internet of things monitoring system based on 5G communication |
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Application publication date: 20200922 |