阅读说明：本技术 一种基于传感网络的轨道交通系统 (Rail transit system based on sensor network ) 是由 朱益钊 黄军坡 吴刚 周杰 于 2021-02-01 设计创作，主要内容包括：本发明提供一种基于传感网络的轨道交通系统,通过温度传感器和湿度传感器用于监测轨道的温度信号和湿度信号,第一分析单元融合湿度信号和温度信号,因为温度和湿度是存在对应关系的,只有在某一温度范围内时湿度处于某一范围时,轨道的韧性会达到低谷；通过压力传感器和振动传感器用于监测轨道的振动信号和压力信号,在此也将振动信号和压力信号融合,因为在压力值较大时,振动信号也会变小,因此,单纯监测振动信号难以对轨道的状态进行监测；最后温湿度、压力、振动信号之间也存在关联,因此,使用第三分析单元对上述四个信号数据进行融合,更加能够对轨道进行安全监测。(The invention provides a rail transit system based on a sensor network, which is characterized in that a temperature sensor and a humidity sensor are used for monitoring a temperature signal and a humidity signal of a rail, and a first analysis unit is used for fusing the humidity signal and the temperature signal, because the temperature and the humidity have a corresponding relation, the toughness of the rail can reach a low valley only when the humidity is in a certain range within a certain temperature range; the pressure sensor and the vibration sensor are used for monitoring the vibration signal and the pressure signal of the track, and the vibration signal and the pressure signal are fused, because the vibration signal is reduced when the pressure value is larger, the state of the track is difficult to monitor by simply monitoring the vibration signal; finally, the temperature, the humidity, the pressure and the vibration signals are also related, so that the four signal data are fused by using the third analysis unit, and the safety monitoring can be performed on the track.)

1. The rail transit system based on the sensor network is characterized by comprising a temperature sensor, a temperature acquisition unit, a humidity sensor, a humidity acquisition unit, a pressure sensor, a pressure acquisition unit, a vibration sensor, a vibration acquisition unit, a first analysis unit, a second analysis unit, a third analysis unit and a central control unit;

wherein, temperature sensor's output with temperature acquisition unit's input is connected, humidity sensor's output with humidity acquisition unit's input is connected, pressure sensor's output with pressure acquisition unit's input is connected, vibration sensor's output with vibration acquisition unit's input is connected, temperature acquisition unit's output with humidity acquisition unit's output all with first analysis unit's input is connected, pressure acquisition unit's output with vibration acquisition unit's output all with second analysis unit's input is connected, first analysis unit's output with second analysis unit's output all with third analysis unit's input is connected, first analysis unit's output, second analysis unit's output and third analysis unit's output all with well accuse unit's input is connected Connecting;

wherein the temperature sensor is arranged at the rail of the rail transit platform and used for sensing the temperature signal of the rail, and transmits the temperature signal to the temperature acquisition unit, the temperature acquisition unit transmits the received temperature signal to the first analysis unit, the humidity sensor is arranged at the rail of the rail transit platform, the humidity acquisition unit is used for sensing a humidity signal of a rail and transmitting the humidity signal to the humidity acquisition unit, the humidity acquisition unit transmits the received humidity signal to the first analysis unit, the first analysis unit calculates a first reference value based on the received temperature signal and humidity signal, transmitting a first reference value to the central control unit, wherein a first reference range is stored in the central control unit, and if the first reference value received by the central control unit is not in the first reference range, the central control unit sends a first early warning signal to a remote monitoring end; the pressure sensor is arranged at the rail of the rail transit platform and used for sensing the pressure signal borne by the rail, and transmits the pressure signal to the pressure acquisition unit, the pressure acquisition unit transmits the received pressure signal to the second analysis unit, the vibration sensor is arranged at the rail of the rail transit platform, the vibration acquisition unit is used for sensing vibration signals of the rail and transmitting the vibration signals to the vibration acquisition unit, the vibration acquisition unit transmits the received vibration signals to the second analysis unit, the second analysis unit calculates a second reference value from the received pressure signal and vibration signal, transmitting a second reference value to the central control unit, wherein a second reference range is stored in the central control unit, and if the second reference value received by the central control unit is not in the second reference range, the central control unit sends a second early warning signal to a remote monitoring end; the first analysis unit transmits the first reference value to the third analysis unit, the second analysis unit transmits the second reference value to the third analysis unit, the third analysis unit calculates a third reference value according to the received first reference value and the second reference value, the third analysis unit transmits the third reference value to the central control unit, a third reference range is stored in the central control unit, and if the third reference value received by the central control unit is not in the third reference range, the central control unit transmits a third early warning signal to a remote monitoring end.

2. The sensor network-based rail transit system of claim 1, wherein the first analysis unit calculates a first reference value from the received temperature signal and humidity signal, and transmits the first reference value to the central control unit, and the first reference value X1= T/H assuming that the temperature signal is T and the humidity signal is H.

3. The sensor-network-based rail transit system of claim 2, wherein the second analysis unit calculates a second reference value from the received pressure signal and vibration signal, and transmits the second reference value to the central control unit, and the second reference value X2= Z/F assuming that the pressure signal is F and the vibration signal is Z.

4. The sensor-network-based rail transit system according to claim 3, wherein the first analyzing unit transmits a first reference value to the third analyzing unit, the second analyzing unit transmits a second reference value to the third analyzing unit, the third analyzing unit calculates a third reference value from the received first and second reference values, the third analyzing unit transmits a third reference value to the central control unit, and the third reference value X3= X1/X2.

5. The sensor network-based rail transit system of claim 1, wherein a signal rectification circuit is arranged between the vibration sensor and the vibration acquisition unit, wherein the signal rectification circuit comprises a first resistor R1, a second resistor R2, a third resistor R3, a fourth resistor R4, a fifth resistor R5, a first operational amplifier circuit A1, a second operational amplifier circuit A2, a first capacitor C1, a first diode Q1 and a first diode D1;

wherein an output end of the vibration sensor is connected to a first end of the first resistor R1, a second end of the first resistor R1 is connected to an inverting input end of the first operational amplifier a1, a non-inverting input end of the first operational amplifier a1 is grounded, an anode of the first diode D1 is connected to an output end of the first operational amplifier a1, a second end of the first resistor R1 is connected to a cathode of the first diode D1, an output end of the first operational amplifier a1 is connected to a base of the first transistor Q1, a second end of the first resistor R1 is connected to an emitter of the first transistor Q1, a collector of the first transistor Q1 is connected to a first end of the second resistor R2, a second end of the second resistor R2 is connected to an inverting input end of the second operational amplifier a2, a first end of the first capacitor C1 is connected to a dc power supply, the second end of the first capacitor C1 is connected to the first end of the third resistor R3, the first end of the fourth resistor R4 is grounded, the second end of the third resistor R3 is connected to the second end of the fourth resistor R4, the second end of the third resistor R3 is connected to the inverting input terminal of the second operational amplifier a2, the non-inverting input terminal of the second operational amplifier a2 is grounded, the output terminal of the second operational amplifier a2 is connected to the input terminal of the vibration acquisition unit, the first end of the fifth resistor R5 is grounded, and the second end of the fifth resistor R5 is connected to the output terminal of the second operational amplifier a 2.

Technical Field

The invention relates to the field of traffic, in particular to a rail transit system based on a sensor network.

Background

Rail transit refers to a type of vehicle or transportation system in which operating vehicles need to travel on a particular rail. The most typical rail transit is a railway system consisting of conventional trains and standard railways. With the diversified development of train and railway technologies, rail transit is more and more types, and is not only distributed in long-distance land transportation, but also widely applied to medium-short distance urban public transportation.

The urban rail transit is a large-traffic-capacity rapid public transit system which takes electric energy as a main power energy and adopts a wheel-rail running system. The system is mainly responsible for barrier-free and short-distance passenger transportation, and usually a light motor train unit or a tramcar is used as a transportation carrier, so that the traffic pressure of dense passenger flow in a city is effectively relieved.

When the rail transit station enters, the speed of a vehicle is reduced, and the rail transit station is a stage where a fault is easy to occur, so that the safety of the rail transit station needs to be evaluated when the rail transit station enters, signals such as current of a locomotive and the like are often acquired and measured in the prior art, the test on a rail is omitted, after research, the safety state of the rail is found to be more important and not to be characterized by a single parameter, and therefore a high-precision signal acquisition system is needed, monitoring on the safety performance of the rail can be improved only by carrying out multi-data fusion on the acquired signals, and further the safety of the locomotive station enters is evaluated.

Disclosure of Invention

Therefore, in order to overcome the above problems, the present invention provides a rail transit system based on a sensor network, which includes a temperature sensor, a temperature acquisition unit, a humidity sensor, a humidity acquisition unit, a pressure sensor, a pressure acquisition unit, a vibration sensor, a vibration acquisition unit, a first analysis unit, a second analysis unit, a third analysis unit, and a central control unit.

Wherein, temperature sensor's output with temperature acquisition unit's input is connected, humidity sensor's output with humidity acquisition unit's input is connected, pressure sensor's output with pressure acquisition unit's input is connected, vibration sensor's output with vibration acquisition unit's input is connected, temperature acquisition unit's output with humidity acquisition unit's output all with first analysis unit's input is connected, pressure acquisition unit's output with vibration acquisition unit's output all with second analysis unit's input is connected, first analysis unit's output with second analysis unit's output all with third analysis unit's input is connected, first analysis unit's output, second analysis unit's output and third analysis unit's output all with well accuse unit's input is connected And (6) connecting.

Wherein the temperature sensor is arranged at the rail of the rail transit platform and used for sensing the temperature signal of the rail, and transmits the temperature signal to the temperature acquisition unit, the temperature acquisition unit transmits the received temperature signal to the first analysis unit, the humidity sensor is arranged at the rail of the rail transit platform, the humidity acquisition unit is used for sensing a humidity signal of a rail and transmitting the humidity signal to the humidity acquisition unit, the humidity acquisition unit transmits the received humidity signal to the first analysis unit, the first analysis unit calculates a first reference value based on the received temperature signal and humidity signal, transmitting a first reference value to the central control unit, wherein a first reference range is stored in the central control unit, and if the first reference value received by the central control unit is not in the first reference range, the central control unit sends a first early warning signal to a remote monitoring end; the pressure sensor is arranged at the rail of the rail transit platform and used for sensing the pressure signal borne by the rail, and transmits the pressure signal to the pressure acquisition unit, the pressure acquisition unit transmits the received pressure signal to the second analysis unit, the vibration sensor is arranged at the rail of the rail transit platform, the vibration acquisition unit is used for sensing vibration signals of the rail and transmitting the vibration signals to the vibration acquisition unit, the vibration acquisition unit transmits the received vibration signals to the second analysis unit, the second analysis unit calculates a second reference value from the received pressure signal and vibration signal, transmitting a second reference value to the central control unit, wherein a second reference range is stored in the central control unit, and if the second reference value received by the central control unit is not in the second reference range, the central control unit sends a second early warning signal to a remote monitoring end; the first analysis unit transmits the first reference value to the third analysis unit, the second analysis unit transmits the second reference value to the third analysis unit, the third analysis unit calculates a third reference value according to the received first reference value and the second reference value, the third analysis unit transmits the third reference value to the central control unit, a third reference range is stored in the central control unit, and if the third reference value received by the central control unit is not in the third reference range, the central control unit transmits a third early warning signal to a remote monitoring end.

Preferably, the first analysis unit calculates a first reference value according to the received temperature signal and humidity signal, and transmits the first reference value to the central control unit, and if the temperature signal is T and the humidity signal is H, the first reference value X1= T/H.

Preferably, the second analysis unit calculates a second reference value according to the received pressure signal and vibration signal, and transmits the second reference value to the central control unit, and if the pressure signal is F and the vibration signal is Z, the second reference value X2= Z/F.

Preferably, the first analysis unit transmits the first reference value to the third analysis unit, the second analysis unit transmits the second reference value to the third analysis unit, the third analysis unit calculates a third reference value from the received first and second reference values, the third analysis unit transmits the third reference value to the central control unit, and the third reference value X3= X1/X2.

Preferably, a signal rectification circuit is disposed between the vibration sensor and the vibration acquisition unit, wherein the signal rectification circuit includes a first resistor R1, a second resistor R2, a third resistor R3, a fourth resistor R4, a fifth resistor R5, a first operational amplifier circuit a1, a second operational amplifier circuit a2, a first capacitor C1, a first triode Q1, and a first diode D1.

Wherein an output end of the vibration sensor is connected to a first end of the first resistor R1, a second end of the first resistor R1 is connected to an inverting input end of the first operational amplifier a1, a non-inverting input end of the first operational amplifier a1 is grounded, an anode of the first diode D1 is connected to an output end of the first operational amplifier a1, a second end of the first resistor R1 is connected to a cathode of the first diode D1, an output end of the first operational amplifier a1 is connected to a base of the first transistor Q1, a second end of the first resistor R1 is connected to an emitter of the first transistor Q1, a collector of the first transistor Q1 is connected to a first end of the second resistor R2, a second end of the second resistor R2 is connected to an inverting input end of the second operational amplifier a2, a first end of the first capacitor C1 is connected to a dc power supply, the second end of the first capacitor C1 is connected to the first end of the third resistor R3, the first end of the fourth resistor R4 is grounded, the second end of the third resistor R3 is connected to the second end of the fourth resistor R4, the second end of the third resistor R3 is connected to the inverting input terminal of the second operational amplifier a2, the non-inverting input terminal of the second operational amplifier a2 is grounded, the output terminal of the second operational amplifier a2 is connected to the input terminal of the vibration acquisition unit, the first end of the fifth resistor R5 is grounded, and the second end of the fifth resistor R5 is connected to the output terminal of the second operational amplifier a 2.

Compared with the prior art, the invention has the following beneficial effects:

the invention provides a rail transit system based on a sensing network, which comprises a temperature sensor, a temperature acquisition unit, a humidity sensor, a humidity acquisition unit, a pressure sensor, a pressure acquisition unit, a vibration sensor, a vibration acquisition unit, a first analysis unit, a second analysis unit, a third analysis unit and a central control unit, wherein the temperature sensor and the humidity sensor are used for monitoring a temperature signal and a humidity signal of a rail, the first analysis unit is used for fusing the humidity signal and the temperature signal, and the toughness of the rail can reach a low valley only when the humidity is in a certain range in a certain temperature range because the temperature and the humidity have a corresponding relation; the pressure sensor and the vibration sensor are used for monitoring the vibration signal and the pressure signal of the track, and the vibration signal and the pressure signal are fused, because the vibration signal is reduced when the pressure value is larger, the state of the track is difficult to monitor by simply monitoring the vibration signal; finally, the temperature, the humidity, the pressure and the vibration signals are also related, so that the four signal data are fused by using the third analysis unit, and the safety monitoring can be performed on the track.

It should be noted that the invention is to use a signal rectification circuit to perform signal processing on the signal collected by the vibration sensor, wherein the current flowing out from the first transistor Q1 enters the inverting input terminal of the second operational amplifier a2, so that the gain of the whole circuit is linear, the signal output from the output terminal of the first operational amplifier a1 can control the current of the first transistor Q1, so that the voltage value at the output terminal of the second operational amplifier a2 can be controlled, and thus the signal of the vibration sensor can be rectified with high precision.

Drawings

FIG. 1 is a schematic diagram of a sensor network based rail transit system of the present invention;

fig. 2 is a schematic diagram of a signal rectification circuit of the present invention.

Detailed Description

The rail transit system based on the sensor network provided by the invention is described in detail below with reference to the accompanying drawings and embodiments.

As shown in fig. 1, the rail transit system based on the sensor network provided by the invention comprises a temperature sensor, a temperature acquisition unit, a humidity sensor, a humidity acquisition unit, a pressure sensor, a pressure acquisition unit, a vibration sensor, a vibration acquisition unit, a first analysis unit, a second analysis unit, a third analysis unit and a central control unit.

Wherein, temperature sensor's output with temperature acquisition unit's input is connected, humidity sensor's output with humidity acquisition unit's input is connected, pressure sensor's output with pressure acquisition unit's input is connected, vibration sensor's output with vibration acquisition unit's input is connected, temperature acquisition unit's output with humidity acquisition unit's output all with first analysis unit's input is connected, pressure acquisition unit's output with vibration acquisition unit's output all with second analysis unit's input is connected, first analysis unit's output with second analysis unit's output all with third analysis unit's input is connected, first analysis unit's output, second analysis unit's output and third analysis unit's output all with well accuse unit's input is connected And (6) connecting.

Wherein the temperature sensor is arranged at the rail of the rail transit platform and used for sensing the temperature signal of the rail, and transmits the temperature signal to the temperature acquisition unit, the temperature acquisition unit transmits the received temperature signal to the first analysis unit, the humidity sensor is arranged at the rail of the rail transit platform, the humidity acquisition unit is used for sensing a humidity signal of a rail and transmitting the humidity signal to the humidity acquisition unit, the humidity acquisition unit transmits the received humidity signal to the first analysis unit, the first analysis unit calculates a first reference value based on the received temperature signal and humidity signal, transmitting a first reference value to the central control unit, wherein a first reference range is stored in the central control unit, and if the first reference value received by the central control unit is not in the first reference range, the central control unit sends a first early warning signal to a remote monitoring end; the pressure sensor is arranged at the rail of the rail transit platform and used for sensing the pressure signal borne by the rail, and transmits the pressure signal to the pressure acquisition unit, the pressure acquisition unit transmits the received pressure signal to the second analysis unit, the vibration sensor is arranged at the rail of the rail transit platform, the vibration acquisition unit is used for sensing vibration signals of the rail and transmitting the vibration signals to the vibration acquisition unit, the vibration acquisition unit transmits the received vibration signals to the second analysis unit, the second analysis unit calculates a second reference value from the received pressure signal and vibration signal, transmitting a second reference value to the central control unit, wherein a second reference range is stored in the central control unit, and if the second reference value received by the central control unit is not in the second reference range, the central control unit sends a second early warning signal to a remote monitoring end; the first analysis unit transmits the first reference value to the third analysis unit, the second analysis unit transmits the second reference value to the third analysis unit, the third analysis unit calculates a third reference value according to the received first reference value and the second reference value, the third analysis unit transmits the third reference value to the central control unit, a third reference range is stored in the central control unit, and if the third reference value received by the central control unit is not in the third reference range, the central control unit transmits a third early warning signal to a remote monitoring end.

In the above embodiment, the rail transit system based on the sensor network provided by the invention includes a temperature sensor, a temperature acquisition unit, a humidity sensor, a humidity acquisition unit, a pressure sensor, a pressure acquisition unit, a vibration sensor, a vibration acquisition unit, a first analysis unit, a second analysis unit, a third analysis unit and a central control unit, wherein the temperature sensor and the humidity sensor are used for monitoring a temperature signal and a humidity signal of a rail, and the first analysis unit fuses the humidity signal and the temperature signal, because the temperature and the humidity have a corresponding relationship, only when the humidity is in a certain range in a certain temperature range, the toughness of the rail can reach a low valley; the pressure sensor and the vibration sensor are used for monitoring the vibration signal and the pressure signal of the track, and the vibration signal and the pressure signal are fused, because the vibration signal is reduced when the pressure value is larger, the state of the track is difficult to monitor by simply monitoring the vibration signal; finally, the temperature, the humidity, the pressure and the vibration signals are also related, so that the four signal data are fused by using the third analysis unit, and the safety monitoring can be performed on the track.

Specifically, the first analysis unit calculates a first reference value according to the received temperature signal and humidity signal, and transmits the first reference value to the central control unit, and if the temperature signal is T and the humidity signal is H, the first reference value X1= T/H.

Specifically, the second analysis unit calculates a second reference value according to the received pressure signal and vibration signal, and transmits the second reference value to the central control unit, and if the pressure signal is F and the vibration signal is Z, the second reference value X2= Z/F.

Specifically, the first analysis unit transmits a first reference value to the third analysis unit, the second analysis unit transmits a second reference value to the third analysis unit, the third analysis unit calculates a third reference value according to the received first reference value and second reference value, the third analysis unit transmits the third reference value to the central control unit, and the third reference value X3= X1/X2.

As shown in fig. 2, a signal rectification circuit is disposed between the vibration sensor and the vibration acquisition unit, wherein the signal rectification circuit includes a first resistor R1, a second resistor R2, a third resistor R3, a fourth resistor R4, a fifth resistor R5, a first operational amplifier circuit a1, a second operational amplifier circuit a2, a first capacitor C1, a first triode Q1, and a first diode D1.

Wherein an output end of the vibration sensor is connected to a first end of the first resistor R1, a second end of the first resistor R1 is connected to an inverting input end of the first operational amplifier a1, a non-inverting input end of the first operational amplifier a1 is grounded, an anode of the first diode D1 is connected to an output end of the first operational amplifier a1, a second end of the first resistor R1 is connected to a cathode of the first diode D1, an output end of the first operational amplifier a1 is connected to a base of the first transistor Q1, a second end of the first resistor R1 is connected to an emitter of the first transistor Q1, a collector of the first transistor Q1 is connected to a first end of the second resistor R2, a second end of the second resistor R2 is connected to an inverting input end of the second operational amplifier a2, a first end of the first capacitor C1 is connected to a dc power supply, the second end of the first capacitor C1 is connected to the first end of the third resistor R3, the first end of the fourth resistor R4 is grounded, the second end of the third resistor R3 is connected to the second end of the fourth resistor R4, the second end of the third resistor R3 is connected to the inverting input terminal of the second operational amplifier a2, the non-inverting input terminal of the second operational amplifier a2 is grounded, the output terminal of the second operational amplifier a2 is connected to the input terminal of the vibration acquisition unit, the first end of the fifth resistor R5 is grounded, and the second end of the fifth resistor R5 is connected to the output terminal of the second operational amplifier a2

In the above embodiment, the signal processing circuit is used to process the signal collected by the vibration sensor, wherein the current flowing out from the first transistor Q1 enters the inverting input terminal of the second operational amplifier a2, so that the gain of the whole circuit is linear, the signal output from the output terminal of the first operational amplifier a1 can control the current of the first transistor Q1, the voltage value at the output terminal of the second operational amplifier a2 can be controlled, and thus the signal of the vibration sensor can be rectified with high precision.

More specifically, the resistance of the first resistor R1 is 10k Ω, the resistance of the second resistor R2 is 10k Ω, the resistance of the third resistor R3 is 100k Ω, the resistance of the fourth resistor R4 is 1k Ω, the resistance of the fifth resistor R5 is 10k Ω, the capacitance of the first capacitor C1 is 0.1 μ F, the model of the first diode D1 is 1N4148, and the model of the first triode Q1 is 2N 3905.

Finally, it should be noted that the above embodiments are only used for illustrating the technical solutions of the present invention and are not limited. Although the present invention has been described in detail with reference to the embodiments, it will be understood by those skilled in the art that various changes may be made and equivalents may be substituted without departing from the spirit and scope of the invention as defined in the appended claims.