阅读说明：本技术 一种轨道交通物联网节点控制系统 (Rail transit internet of things node control system ) 是由 苏向上 于 2020-06-29 设计创作，主要内容包括：本发明公开了一种轨道交通物联网节点控制系统,包括信号采样模块、比较检测模块,所述信号采样模块对轨道交通物联网节点输出信号采样,信号采样模块输出端口连接比较检测模块输入端口,物联网节点故障导致信号异常,此时运放器AR3输出高电平信号,同时运用运放器AR3和电容C7-电容C9对信号降噪,保证信号的准确性,最后运用运放器AR5和二极管D7、二极管D8组成的峰值检波电路筛选信号中的峰值信号,利用峰值信号触发信号发射器E1工作,为了进一步提高触发信号的精度,运用可控硅D9检测运放器AR2和运放器AR3反相输入端电位,对信号发射器E1的触发信号微调,轨道交通物联网节点控制系统终端及时接收物联网节点信息,并及时响应。(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.)

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.

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.