Railway station entry monitoring system based on wireless communication technology

Abstract

According to the railway station pull-in monitoring system based on the wireless communication technology, the signal machine obtains an inertia distance, namely an inertia signal, according to a corresponding numerical value of a speed signal and a braking distance, and obtains a pre-stopping distance signal according to the distance information between a vehicle and a target position minus the inertia distance; gPS positioning information and electronic map site information pre-stored in an annunciator are subjected to differential calculation by a differential amplifier, a difference value between the GPS positioning information and a pre-parking distance signal is calculated by a subtracter, when the forward difference value is small, the forward difference value is added to an input end of a photoelectric coupler U2 through a diode D1, a voltage difference at the input end is converted into a linear voltage, the linear voltage is coupled with-15V, and the linear voltage is converted into a direct current signal. The magnitude of a braking signal is adjusted, then the braking torque and the negative difference value are adjusted, the difference value of an inertia signal is calculated through an operational amplifier AR1, the sampling holding time of a signal machine station entering control signal received by a photoelectric coupler U1 is changed, the time transmitted to a vehicle driver is compensated, and station yard station entering accurate positioning parking is achieved.

Description

TECHNICAL FIELD

[0001] The utility model relates to railway station yard station entry technical field especially is based on wireless communication technology's railway station yard station entry monitoring system. BACKGROUND

[0002] Commonly used railway station yard station entry positioning monitoring adopts sensor such as ranging sensor, speed sensor, respectively monitors vehicle and parking point position information, that is ranging information, vehicle speed information, wireless transmission to signal machine, and signal machine controls brake device to park in station yard according to ranging information and vehicle speed information, completes railway station yard station entry positioning monitoring, and usually station entrance station entry will limit speed and railway is flat, and the vehicle speed is slow, stable, can realize positioning, when there is no signal machine in front, that is, when the vehicle does not need to limit speed and enter, due to vehicle speed, vehicle inertia, often can not realize accurate positioning parking in station yard. UTILITY MODEL CONTENTS

[0003] In view of the deficiencies of the prior art, the present application aims to provide a railway station yard station entry monitoring system based on wireless communication technology, which effectively solves the problem of vehicle speed, vehicle inertia, and cannot realize accurate positioning parking in station yard.

[0004] The technical solution solved is that the ranging sensor, the speed sensor, the GPS positioning, the data preprocessing circuit, the signal machine station entry control signal, the brake device, and the signal machine are connected, the inertia signal pre-parking distance signal and the GPS positioning output by the signal machine are connected to the data preprocessing circuit, the data preprocessing circuit compensates the station entry control signal output by the signal machine, and the data preprocessing circuit adjusts the brake torque of the brake signal and the brake device output by the signal machine.

[0005] Preferably, the data pre-processing circuit comprises resistors R7, R8, one end of the resistor R7 is connected to the real-time positioning signal of GPS positioning, the other end of the resistor R7 is connected to the non-inverting input terminal of the operational amplifier AR2, one end of the resistor R8 is connected to the target position signal, the other end of the resistor R8 is connected to the ground resistor R9 and the inverting input terminal of the operational amplifier AR2, one end of the inductor L1 is connected to the output terminal of the operational amplifier AR2, the other end of the inductor L1 is connected to one end of the capacitor C3 and the base of the transistor Q1, the emitter of the transistor Q1 and the collector of the transistor Q2 are connected to the pre-parking distance signal, the collector of the transistor Q1 is connected to the base of the transistor Q2, the emitter of the transistor Q2 is connected to one end of the ground resistor R10, one end of the resistor R5 and one end of the resistor R13, the other end of the resistor R13 is connected to pin 2 of the photoelectric coupler U2, pin 1 of the photoelectric coupler U2 is connected to the power supply +1V, pin 4 of the photoelectric coupler U2 is connected to the power supply +10V through the resistor R11, pin 3 of the photoelectric coupler U2 is connected to one end of the resistor R12, the other end of the resistor R12 is connected to one end of the resistor R14 and the gate of the field effect transistor T2, the other end of the resistor R14 is connected to the power supply -15V, the source of the field effect transistor T2 is connected to the brake resistor RZ in parallel and enters the brake signal, the other end of the resistor R5 is connected to the inverting input terminal of the operational amplifier AR1 and one end of the ground resistor R6, the non-inverting input terminal of the operational amplifier AR1 is connected to the inertia signal through the resistor R4, the output terminal of the operational amplifier AR1 is connected to one end of the capacitor C2 and the negative electrode of the varactor diode DC1, the positive electrode of the varactor diode DC1 is connected to the ground, the other end of the capacitor C2 and the right end of the switch K1 output the signal to the vehicle driver, the left end of the switch K1 is connected to the collector of the transistor Q1 and one end of the resistor R3, the emitter of the transistor Q1 is connected to the ground, the base of the transistor Q1 is connected to one end of the resistor R2 and pin 4 of the photoelectric coupler U1, the other end of the resistor R2 and the other end of the resistor R3 are connected to the power supply +5V, one end of the resistor R1 and one end of the capacitor C1 are connected to pin 1 of the photoelectric coupler U1, the other end of the resistor R1 is connected to the signal machine entry control signal, pin 2 of the photoelectric coupler U1 and the other end of the capacitor C1 are connected to the ground.

[0006] The utility model discloses a beneficial effect: the real-time position information of the vehicle of accepting GPS orientation, and accept the electronic map station site information of prestorage in signal machine, by differential amplifier carries out differential calculation, after inductance L1 and capacitor C3 filter, enters subtracter and calculates the difference value with the pre parking distance signal, the positive difference value is little and is added to the input end of photoelectric coupler U2 through diode D1, converts the voltage difference of input end into linear voltage, and -15V coupling, changes the source electrode resistance value of field effect tube T2, adjusts the resistance value of brake resistance RZ parallel, adjusts the size of brake signal, and then adjusts the brake torque, realizes the brake parking of urgent time, and the negative difference value is added to the inverting input end of operational amplifier AR1 through resistance R5, and the noninverting input end of operational amplifier AR1 is connected with inertia signal, and operational amplifier AR1 calculates the difference value and adds to the negative pole of varactor diode DC1, changes the signal machine station control signal that photoelectric coupler U1 accepts, compensates the time transmission to vehicle driver, realizes station field station positioning parking accurately. BRIEF DESCRIPTION OF DRAWINGS

[0007] Figure 1 It is the circuit schematic diagram of the utility model. DETAILED DESCRIPTION

[0008] For the foregoing and other technical content, features and effects of the present application, the following will be described with reference to the accompanying drawings. Figure 1 The detailed description of the embodiments will be clearly presented. The structure content mentioned in the following embodiments is all with reference to the drawings.

[0009] The following will describe the exemplary embodiments of the present application with reference to the accompanying drawings.

[0010] Embodiment one, based on wireless communication technology of railway station yard monitoring system, including ranging sensor, speed sensor, GPS positioning, data preprocessing circuit, signal machine into the control signal, brake device, signal machine, the vehicle and target position distance information detected by the ranging sensor, speed sensor detection vehicle speed information into the signal machine, by signal machine according to the speed signal and the corresponding value of brake distance to draw inertia distance also known as inertia signal, for example, the speed of the general ordinary train is v01=80km / h, its brake distance is 800m, by signal machine according to the vehicle and target position distance information minus inertia distance to draw pre parking distance signal, pre parking distance signal, inertia signal, GPS positioning of vehicle real-time location information into data preprocessing circuit, data preprocessing circuit adjustment signal machine output brake signal, brake device brake torque, specifically, data preprocessing circuit accepts GPS positioning of vehicle real-time location information, and accepts pre stored in the signal machine of electronic map site information, by differential amplifier composed of operational amplifier AR2, resistance R7-resistance R9 differential calculation, after inductance L1 and capacitor C3 filter into the triode Q1, triode Q2 consisting of subtracter to calculate the difference value with pre parking distance signal, positive difference value is small, through diode D1 to photoelectric coupler U2 input end, the voltage difference of input end is converted to linear voltage, coupled with-15V, change the source resistance of field effect transistor T2, adjust the resistance value parallel to brake resistance RZ, adjust the size of brake signal, and then adjust brake torque, realize the brake parking in emergency, negative difference value and through resistance R5 to operational amplifier AR1 inverting input terminal, operational amplifier AR1 same phase input terminal access inertia signal, operational amplifier AR1 to calculate the difference value to the negative of varactor diode DC1, change the signal machine into the control signal accepted by photoelectric coupler U1, compensate the time of transmission to vehicle driver, realize the station yard into the accurate positioning parking.

[0011] In the embodiment two, on the basis of the embodiment one, the data pre-processing circuit accepts the real-time position information of the GPS positioning vehicle and the site information of the electronic map stored in the signal machine in advance. The differential amplifier composed of the operational amplifier AR2, the resistor R7 and the resistor R9 carries out differential calculation. After being filtered by the inductor L1 and the capacitor C3, the difference value with the pre-parking distance signal is calculated by the subtractor composed of the triode Q1 and the triode Q2. When the positive difference value is small, it is added to the input end of the photoelectric coupler U2 through the diode D1, the voltage difference of the input end is converted into linear voltage, which is coupled with -15V, the resistance of the source electrode of the field effect transistor T2 is changed, the resistance connected in parallel with the brake resistor RZ is adjusted, the size of the brake signal is adjusted, and then the brake torque is adjusted, so as to realize the emergency brake parking. The negative difference value is added to the inverting input end of the operational amplifier AR1 through the resistor R5, the non-inverting input end of the operational amplifier AR1 is connected to the inertia signal, the difference value calculated by the operational amplifier AR1 is added to the negative electrode of the variable capacitance diode DC1, the signal machine entering station control signal accepted by the photoelectric coupler U1 is changed, the time transmitted to the vehicle driver is compensated, the station entering station positioning parking is realized, and the photoelectric coupler U1 is adopted to accept. After being kept through the switch K1, the capacitor C2 and the variable capacitance diode DC1 connected in series, the signal is added to the vehicle driver, including the resistor R7, the resistor R8, one end of the resistor R7 is connected to the real-time positioning signal of the GPS positioning, the other end of the resistor R7 is connected to the non-inverting input end of the operational amplifier AR2, one end of the resistor R8 is connected to the target position signal, the other end of the resistor R8 is connected to one end of the grounding resistor R9 and the inverting input end of the operational amplifier AR2 respectively, one end of the inductor L1 is connected to the output end of the operational amplifier AR2, the other end of the inductor L1 is connected to one end of the grounding capacitor C3 and the base electrode of the triode Q1 respectively, the emitter electrode of the triode Q1 and the collector electrode of the triode Q2 are connected to the pre-parking distance signal, the collector electrode of the triode Q1 is connected to the base electrode of the triode Q2, the emitter electrode of the triode Q2 is connected to one end of the grounding resistor R10, one end of the resistor R13 and the negative electrode of the diode D1 respectively, one end of the resistor R5 is connected to the positive electrode of the diode D1, the other end of the resistor R13 is connected to the positive electrode of the diode D2, the negative electrode of the diode D2 is connected to pin 2 of the photoelectric coupler U2, pin 1 of the photoelectric coupler U2 is connected to the power supply +1V, pin 4 of the photoelectric coupler U2 is connected to the power supply +10V through the resistor R11, pin 3 of the photoelectric coupler U2 is connected to one end of the resistor R12, the other end of the resistor R12 is connected to one end of the resistor R14 and the gate electrode of the field effect transistor T2 respectively, the other end of the resistor R14 is connected to the power supply -15V, the source electrode of the field effect transistor T2 is connected in parallel with the brake resistor RZ and connected into the brake signal, the other end of the resistor R5 is connected to the inverting input end of the operational amplifier AR1 and one end of the grounding resistor R6 respectively, the non-inverting input end of the operational amplifier AR1 is connected to the inertia signal through the resistor R4, the output end of the operational amplifier AR1 is connected to one end of the capacitor C2 and the negative electrode of the variable capacitance diode DC1 respectively, the positive electrode of the variable capacitance diode DC1 is connected to the ground.The other end of the capacitor C2 and the right end of the switch K1 output signals to the vehicle driver, the left end of the switch K1 is connected to the collector of the triode Q1, the one end of the resistor R3 is connected to the emitter of the triode Q1, the base of the triode Q1 is connected to the one end of the resistor R2 and the pin 4 of the photoelectric coupler U1, the other end of the resistor R2 and the other end of the resistor R3 are connected to the power supply +5V, the one end of the resistor R1 and the one end of the capacitor C1 are connected to the pin 1 of the photoelectric coupler U1, the other end of the resistor R1 is connected to the signal machine entry control signal, the pin 2 of the photoelectric coupler U1 and the other end of the capacitor C1 are connected to the ground.

Claims

1. A wireless communication technology-based railway yard entry monitoring system, comprising a ranging sensor, a speed sensor, a GPS positioning, a data preprocessing circuit, a signal machine entry control signal, a braking device, a signal machine, characterized in that, The ranging sensor, the speed sensor are connected with the signal machine, the inertial signal and the pre-stopping distance signal outputted by the signal machine are connected with the data pre-processing circuit, the data pre-processing circuit compensates the station control signal outputted by the signal machine, and the data pre-processing circuit adjusts the braking torque of the braking device.

2. The wireless communication technology based railroad yard entry monitoring system of claim 1, wherein, The data pre-processing circuit comprises a resistor R7, a resistor R8, one end of the resistor R7 is connected with the real-time positioning signal of the GPS positioning, the other end of the resistor R7 is connected with the non-inverting input terminal of an operational amplifier AR2, one end of the resistor R8 is connected with the target position signal, the other end of the resistor R8 is connected with one end of a grounding resistor R9 and the inverting input terminal of the operational amplifier AR2, the output terminal of the operational amplifier AR2 is connected with one end of an inductor L1, the other end of the inductor L1 is connected with one end of a capacitor C3 and the base of a transistor Q1, the emitter of the transistor Q1 and the collector of a transistor Q2 are connected with the pre-stopping distance signal, the collector of the transistor Q1 is connected with the base of the transistor Q2, the emitter of the transistor Q2 is connected with one end of a grounding resistor R10, one end of a resistor R5 and one end of a resistor R13, the other end of the resistor R13 is connected with pin 2 of an optical coupler U2, pin 1 of the optical coupler U2 is connected with a power supply +1V, pin 4 of the optical coupler U2 is connected with a power supply +10V through a resistor R11, pin 3 of the optical coupler U2 is connected with one end of a resistor R12, the other end of the resistor R12 is connected with one end of a resistor R14 and the gate of a field effect transistor T2, the other end of the resistor R14 is connected with a power supply -15V, the source of the field effect transistor T2 is connected with a braking resistor RZ in parallel and is connected into the braking signal, the other end of the resistor R5 is connected with the inverting input terminal of an operational amplifier AR1 and one end of a grounding resistor R6, the non-inverting input terminal of the operational amplifier AR1 is connected with the inertial signal through a resistor R4, the output terminal of the operational amplifier AR1 is connected with one end of a capacitor C2 and the negative electrode of a varicap diode DC1, the positive electrode of the varicap diode DC1 is connected with the ground, the other end of the capacitor C2 and the right end of a switch K1 output the signal to the vehicle driver, the left end of the switch K1 is connected with the collector of the transistor Q1 and one end of a resistor R3, the emitter of the transistor Q1 is connected with the ground, one end of a resistor R2 and pin 4 of an optical coupler U1, the other end of the resistor R2 and the other end of the resistor R3 are connected with a power supply +5V, one end of a resistor R1 and one end of a capacitor C1 are connected with pin 1 of the optical coupler U1, the other end of the resistor R1 is connected with the station control signal of the signal machine, pin 2 of the optical coupler U1 and the other end of the capacitor C1 are connected with the ground.

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