CN110341754B

CN110341754B - Trouble monitoring system for indication rod of switch machine

Info

Publication number: CN110341754B
Application number: CN201910690764.0A
Authority: CN
Inventors: 卢伟; 李春莹; 李丽兰; 梁宏伟; 占雪梅
Original assignee: Zhengzhou Railway Vocational and Technical College
Current assignee: Zhengzhou Railway Vocational and Technical College
Priority date: 2019-07-29
Filing date: 2019-07-29
Publication date: 2020-03-03
Anticipated expiration: 2039-07-29
Also published as: CN110341754A

Abstract

The invention discloses a turnout switch indication rod fault monitoring system, wherein a signal acquisition unit receives a turnout switch indication rod gap width signal detected by an eddy current sensor, the turnout switch indication rod gap width signal is amplified and conditioned by an in-phase amplifying circuit, a triode Q1 is arranged to reduce an abnormal high potential signal and an electrolytic capacitor E2 is arranged to increase an abnormal low potential signal, when the signal has an abnormal trend, the signal enters a fault discrimination unit, whether the indication rod gap width is within 2 +/-0.5 mm or not is judged by a double-hysteresis comparator, a green indicator lamp is on when the indication rod gap width is normal, a red indicator lamp is on when the indication rod is abnormal, a horn alarms, when a timing switch K1 time is reached or the indication rod gap width is judged to be abnormal, a signal output by an operational amplifier AR1 generates a high-frequency modulation signal through an oscillating circuit, the high-frequency modulation signal is further resonated with the resonant circuit to generate an optimal transmission frequency, the transmitter is stably transmitted to the remote monitoring terminal, the circuit structure is simple, and the timeliness of processing abnormal information is improved.

Description

Trouble monitoring system for indication rod of switch machine

Technical Field

The invention relates to the technical field of fault detection, in particular to a fault monitoring system for a display rod of a turnout switch machine.

Background

A switch machine indication rod gap width monitoring system with an authorization notice number of CN104197821B and an eddy current sensor thereof utilize the movement of a metal conductor to change a magnetic field generated by an eddy current probe, convert the magnetic field into current or voltage, and output the current or voltage after being rectified and filtered by a detection module, temperature compensated by a temperature compensation module and amplified by an output buffer module, thereby designing the eddy current sensor which meets the actual requirements (accuracy and sensitivity); the information of the width of the notch of the indicating rod detected by the eddy current sensor is transmitted to a collector, particularly, the information is connected to a microprocessor module through an AD acquisition module in the collector, and is transmitted to a remote monitoring terminal (a remote monitoring center, a wireless handset and the like) through a communication module after being processed to realize remote monitoring, however, the information is acquired by the collector and is transmitted to the remote monitoring terminal through the communication module to realize remote monitoring, the method can ensure the accuracy of monitoring signals and the real-time performance of monitoring, but the data acquired and transmitted to the remote monitoring terminal by the collector is real-time information, the information quantity is large, and the information to be transmitted after being acquired by the collector and the information received by the remote monitoring terminal are processed firstly, so that the problems that the abnormal information cannot be found and processed immediately due to transmission waiting time and processing waiting time exist, that is, the timeliness of processing the abnormal information cannot be guaranteed and the cost is high.

The present invention provides a new solution to this problem.

Disclosure of Invention

In view of the above situation, in order to overcome the defects of the prior art, the present invention aims to provide a switch point indication rod fault monitoring system, which has the characteristics of ingenious conception and humanized design, and effectively solves the problems that abnormal information cannot be processed in time and the cost is high.

The technical scheme for solving the problem is that the remote monitoring system comprises an eddy current sensor, a microprocessor module, a communication module and a remote monitoring terminal, wherein a turnout switch indication rod gap width signal detected by the eddy current sensor is processed by the microprocessor module and then transmitted to the remote monitoring terminal through the communication module to realize remote monitoring;

the signal acquisition unit receives a signal of the gap width of a switch machine indicating rod detected by an eddy current sensor, the signal is amplified and conditioned through an operational amplifier AR1 after being filtered by LC, a triode Q1 is arranged to reduce an abnormal high potential signal and an electrolytic capacitor E2 is arranged to improve an abnormal low potential signal, so that a signal output by the operational amplifier AR1 is within the range of 0-5V, then one path of the signal enters a signal controllable transmission unit, when the signal output by the operational amplifier AR1 is higher than the voltage 2.5 corresponding to the gap width of 2mm, an integrator taking the operational amplifier AR1 as the core calculates the voltage change rate, when the voltage change rate is positive and higher than the conduction voltage value of a diode D1 by 0.3V, a thyristor VTL1 is conducted, the signal output by the operational amplifier AR1 enters a fault discrimination unit, the fault discrimination unit judges whether the voltage indicating the gap width of the rod is within the voltage 2.5 +/-0.8V corresponding to the gap width of 2 +/-0.5 mm through a double hysteresis comparator consisting of the operational, the signal controllable transmission unit is used for driving a triode Q5 to be conducted when the time of the timing switch K1 reaches or when the fault discrimination unit judges that the time is abnormal, signals output by the operational amplifier AR1 are subjected to preliminary frequency modulation by an oscillation circuit with a triode Q2, a capacitor C6 and a capacitor C7 as cores, and the signals are transmitted to a remote monitoring terminal through a transmitter after further micro-frequency modulation by the oscillation circuit with the triode Q2, the inductor L1-inductor L3, the capacitor C13 and the varactor DC1 as cores.

Due to the adoption of the technical scheme, compared with the prior art, the invention has the following advantages: the switch machine detected by the current vortex sensor shows the width signal of the rod gap, the signal is amplified and conditioned by the LC filtering and in-phase amplifying circuit, and a triode Q1 is arranged to reduce the abnormal high potential signal and an electrolytic capacitor E2 increases the abnormal low potential signal, so that the signal output by the operational amplifier AR1 is in the range of 0-5V, when the amplified and conditioned signal is higher than the voltage 2.5V corresponding to the gap width 2mm, the signal enters an integrator to calculate the voltage change rate, when the signal is positive and higher than the conduction voltage value of a diode D1 by 0.3V, namely when the switch machine shows that the rod gap width has the abnormal trend, a double-hysteresis comparator composed of the operational amplifier AR3 and AR4 as cores judges whether the rod gap width is in the voltage 2.5 +/-0.8V corresponding to the gap width 2 +/-0.5 mm, a green indicator lamp is on normally, a triode Q5 is driven to be conducted when the abnormal, a red indicator lamp is on normally, and a horn is, the visual indication is carried out on site, and the judgment of whether the abnormal condition exists or not is facilitated for workers;

when the time of the timing switch K1 is reached or the fault judging unit judges that the signal is abnormal, the signal output by the signal collecting unit is preliminarily frequency modulated by a capacitance three-point oscillating circuit taking a triode Q2, a capacitor C6 and a capacitor C7 as cores and is modulated into a high-frequency signal, the triode Q2, an inductor L1-an inductor L3, a capacitor C13 and a varactor DC1 as cores and a resonance circuit taking the core as the core and modulating the frequency component of the high-frequency signal are further resonated to generate the optimal transmission frequency required, a frequency selection network is arranged to select the frequency and feed the frequency back to the base electrode of a triode Q2 to ensure the stability of the high-frequency modulation signal applied to the emitter, and finally the signal is transmitted to a remote monitoring terminal by the emitter, the circuit structure is simple, when the switch machine indicates that the width signal of a rod gap is normal, the emitter transmits the signal at regular time, the emitter immediately transmits the signal when the fault judging unit, the timeliness of processing the abnormal information is improved.

Drawings

Fig. 1 is a schematic circuit diagram of the present invention.

Detailed Description

The foregoing and other technical and scientific aspects, features and utilities of the present invention will be apparent from the following detailed description of the embodiments, which is to be read in connection with the accompanying drawings of fig. 1. The structural contents mentioned in the following embodiments are all referred to the attached drawings of the specification.

Exemplary embodiments of the present invention will be described below with reference to the accompanying drawings.

According to the turnout switch indication rod fault monitoring system, voltage corresponding to a turnout switch indication rod gap width signal detected by an eddy current sensor is processed by a microprocessor module and then transmitted to a remote monitoring terminal through a communication module to realize remote monitoring;

the signal acquisition unit receives a signal of the width of a gap of a switch machine indicating rod detected by the eddy current sensor, the signal enters an in-phase amplification circuit consisting of an operational amplifier AR1, a resistor R1, a resistor R2 and a resistor RA after being filtered by LC, the amplified signal is subjected to frequency selection by an RC frequency selection circuit, the frequency component of a stable direct current voltage signal output by the eddy current sensor passes through the amplified signal, when the amplitude of the frequency-selected signal is higher than the voltage stabilization value of a voltage stabilization tube Z1 by 5V, the CE junction resistor of a triode Q1 is changed, the resistance value of a feedback resistor R1 of the operational amplifier AR1 is reduced, an abnormal high potential signal is further reduced, when the amplitude of the frequency-selected signal is lower than the voltage stabilization value of a negative voltage stabilization tube Z1 by 0.3V, a negative voltage is reversed by an electrolytic capacitor E1, namely a positive voltage is fed back to the in-phase input end of the operational amplifier AR1 through a resistor RB, the input abnormal low potential signal is further improved, and the signal output by the operational amplifier 829, then one path enters a signal controllable transmission unit, when the signal output by the operational amplifier AR1 is higher than the voltage 2.5 corresponding to the notch width 2mm, namely the amplitude of the signal after frequency selection is higher than the voltage stabilization value 2.5V of the voltage stabilizing tube Z3, the voltage stabilizing tube Z3 is broken down, the signal enters an integrator consisting of the operational amplifier AR1, a resistor R6, a resistor R7 and a capacitor C4 to calculate the voltage change rate, when the voltage change rate is positive and higher than the conduction voltage value 0.3V of a diode D1, namely when the switch machine indicates that the notch width of the rod has a tendency of abnormity, the thyristor VTL1 is conducted, the signal after frequency selection enters a fault determination unit, the fault determination unit determines whether the notch width of the rod is higher than the voltage 2.5+0.8V corresponding to the notch width 2+0.5mm through a hysteresis comparator consisting of the operational amplifier AR3, a triode Q4 and a high threshold voltage, and a low threshold voltage, and determines whether the notch width of the rod AR is lower than the notch width of the notch voltage corresponding to the notch width of the notch 2.5-0.5 mm When the voltage is 2.5-0.8V and is higher than the low threshold voltage and the low and high threshold voltages, the two hysteresis comparators output stable low level, the green indicator light LED1 lights to indicate that the turnout switch machine indicates that the width of the rod gap is normal, otherwise, when the voltage is lower than the low threshold voltage or the high and high threshold voltages, the hysteresis comparator of the corresponding high threshold voltage or the hysteresis comparator of the low threshold voltage outputs stable high level, the red indicator light LED2 lights and the horn LB sounds to alarm to indicate that the turnout switch machine indicates that the width of the rod gap is abnormal, when the time of the timing switch K1 reaches or the fault determination unit determines that the abnormal condition occurs, the photoelectric coupler U1 is conducted, the diode D4 is conducted, the +5V voltage is applied to the control electrode of the thyristor VTL2 to trigger the thyristor VTL2 to be conducted, the direct current voltage signal output by the signal acquisition unit is subjected to the primary frequency modulation by a three-point oscillator circuit consisting of a triode Q2, a capacitor C6, a capacitor C7 and an inductor L3, namely, the signal output by the signal acquisition unit is modulated into a high-frequency signal, because the modulated high-frequency signal has noise signals and can also be interfered by other frequency signals, a resonant circuit taking a triode Q2, an inductor L1, an inductor L2, an inductor L3, a capacitor C13 and a varactor DC1 as cores is arranged to further resonate with frequency components modulated into the high-frequency signal to generate the optimal transmission frequency required, and meanwhile, the inductor L2 connected in series and in parallel with the capacitor C13 and the varactor DC1 filter the noise signals existing in the high-frequency signal, wherein a frequency selection network consisting of the triode Q3, the capacitors C8 and C9 and the resistor R13 is arranged to select frequency and feed back to the base of the triode Q2 to ensure the stability of the high-frequency modulation signal on the transmitter, and finally the transmitter transmits the noise signals to a remote monitoring terminal, the circuit structure is simple, and the point switch shows that the bar notch width signal is normal, the transmitter sends the information at regular time, and the transmitter immediately sends the information when the information is abnormal, so that channel transmission resources occupied by real-time transmission are saved, and the timeliness of processing the abnormal information is improved.

In the second embodiment, on the basis of the first embodiment, the signal acquisition unit receives a signal indicating a width of a gap of a switch point detected by the eddy current sensor, the signal is filtered by an LC filter circuit composed of an inductor L1 and a capacitor C1, and then enters an in-phase amplifier circuit composed of an operational amplifier AR1, a resistor R1, a resistor R2 and a resistor RA for amplification and conditioning, the amplification factor is determined by the resistance values of a resistor R1 and a resistor RA, and the amplified signal is frequency-selected by an RC frequency-selecting circuit composed of a resistor R4, a resistor R5, a capacitor C2 and a capacitor C3, so that the frequency component of a stable direct current voltage signal output by the eddy current sensor passes through (since the detection module in the prior art only performs half-wave rectification through a diode D1 and a diode D2, the capacitor C5 and a capacitor C6, and is also a pulse current of a received alternating current voltage signal), the rest frequency components are blocked, and the amplitude of the signal after frequency selection is higher than the stable voltage value of a zener tube Z1, when the voltage stabilizing tube Z1 breaks down, a signal is added to the base electrode of the triode Q1, the CE junction resistance of the triode Q1 is changed, the resistance value of a feedback resistor R1 of the operational amplifier AR1 is reduced, the amplification factor is further reduced, an abnormal high potential signal is further reduced, when the signal amplitude after frequency selection is lower than the voltage stabilizing value of a negative voltage stabilizing tube Z1 by 0.3V, the negative voltage is reversed through an electrolytic capacitor E1, namely the positive voltage is fed back to the same-phase input end of the operational amplifier AR1 through a resistor RB, the input abnormal low potential signal is further improved, the signal output by the operational amplifier AR1 is within the range of 0-5V, then one path enters a signal controllable transmission unit, when the signal output by the operational amplifier AR1 is higher than the voltage 2.5 corresponding to the gap width of 2mm, namely the signal amplitude after frequency selection is higher than the voltage stabilizing value of the voltage stabilizing tube Z3 by 2.5V, the voltage stabilizing tube Z3 breaks down, the signal enters the operational amplifier AR1, the resistor R6, the resistor R7 and the integral resistor C4, when the voltage is positive and higher than the conducting voltage value of the diode D1 by 0.3V, the thyristor VTL1 is conducted, and a signal enters the fault discrimination unit after frequency selection, wherein the fault discrimination unit comprises an inductor L1, one end of the inductor L1 is connected with a turnout switch machine indication rod gap width signal detected by an eddy current sensor, the other end of the inductor L1 is respectively connected with a non-inverting input end of an operational amplifier AR1 and one end of a resistor RB through a resistor RA, an inverting input end of the operational amplifier AR1 is respectively connected with one end of a resistor R1, one end of a grounding resistor R2 and a collector of a triode Q1, the other end of a resistor R1 is respectively connected with an output end of an operational amplifier AR1 and an emitter of a triode Q1 of a resistor R4, the other end of the resistor R4 is connected with one end of a capacitor C2, the other end of the capacitor C2 is respectively connected with a cathode of a voltage regulator Z1, an anode of a voltage regulator Z2, a, One end of a resistor R3, the anode of a voltage regulator tube Z1 is connected with the base of a triode Q1, the cathode of a voltage regulator tube Z2 and the cathode of a grounding electrolytic capacitor E1 are connected with the other end of a resistor RB, the other end of a resistor R3 is connected with the anode of a thyristor VTL1, the anode of a voltage regulator tube Z3 is respectively connected with the inverting input end of an operational amplifier AR2, one end of a resistor R6 and one end of a capacitor C4, the non-inverting input end of an operational amplifier AR2 is connected with the ground through a resistor R7, the output end of the operational amplifier AR2 is respectively connected with the other end of a resistor R6, the other end of a capacitor C4 and the anode of a diode D1, the cathode of a diode D1 is respectively connected with one end of a resistor R8, the anode of a grounding electrolytic capacitor E2 and the control electrode of a thyristor VTL 1.

In a third embodiment, on the basis of the first embodiment, the fault determination unit receives the output signal of the signal acquisition unit, and the output signal enters a hysteresis comparator of a high threshold voltage, which is composed of an operational amplifier AR3, a transistor Q4 and a high threshold voltage (provided by a voltage division circuit composed of a resistor R15, a resistor R6 and a potentiometer RP 1), to determine whether the rod notch width is higher than a voltage 2.5+0.8V corresponding to 2+0.5mm, and simultaneously enters a hysteresis comparator of a low threshold voltage, which is composed of an operational amplifier AR4, a transistor Q6 and a low threshold voltage (provided by a voltage division circuit composed of a resistor R15, a resistor R6 and a potentiometer RP 1), to determine whether the rod notch width is lower than a voltage 2.5-0.8V corresponding to 2-0.5mm, and is higher than the low threshold voltage and when the low and high threshold voltages are both high threshold voltages, the glitch at the high and low level is eliminated, and the two comparators output stable low levels, and the diode D4 and the diode D5, An AND gate circuit composed of a resistor R21 connected with a power supply outputs a low level to enable the power supply +5V, a green indicator light LED1, a resistor R19 and a low level (ground) to form a loop for current circulation, the green indicator light LED1 is lightened to indicate that a switch machine indicates that the width of a rod gap is normal, otherwise, when the voltage is lower than a low threshold voltage or higher than the high threshold voltage, a hysteresis comparator of a corresponding high threshold voltage or a hysteresis comparator of the low threshold voltage outputs a stable high level, a diode D2, a diode D3 and a grounding resistor R20 or a gate circuit outputs a high level to drive a triode Q5 to be conducted, the collector potential is ground, the power supply +5V, the resistor R17 and the green indicator light LED1 which are connected in series, the ground, the resistor R18 and a horn LB which are connected in series by the power supply +5V and the ground respectively form a loop for current circulation, a red indicator light LED2 is lightened, a horn LB sounds an alarm to indicate that the switch machine indicates that, the LED driving circuit comprises operational amplifiers AR3 and AR4, wherein a non-inverting input end of an operational amplifier AR3 and an inverting input end of an operational amplifier AR4 are connected with a cathode of a thyristor VTL1, an inverting input end of an operational amplifier AR3 is respectively connected with one end of a resistor R15 and one end of a resistor R16, the other end of a resistor R16 is connected with an upper end and an adjustable end of a potentiometer RP1, an emitter of a triode Q4 and a non-inverting input end of an operational amplifier AR4, an output end of the operational amplifier AR3 is respectively connected with a base of a triode Q4, an anode of a diode D2 and a cathode of a diode D4, output ends of the operational amplifier AR4 are respectively connected with a base of a triode Q4, one end of a resistor R4, an anode of a diode D4 and a cathode of a diode D4, an anode of the diode D4 is respectively connected with an anode of a diode D4, one end of a resistor R4, the other end of the resistor R4 is connected with a cathode of a green, The other end of the resistor R21, the collector of the triode Q4 and the other end of the resistor R15 are all connected with a power supply of +5V, the collector of the triode Q6 and the other end of the resistor R21 are connected with a power supply of +0.3V, the lower end of the potentiometer RP1 is all connected with ground, the cathode of the diode D2 is respectively connected with the cathode of the diode D3, one end of the ground resistor R20 and the base of the triode Q5, the emitter of the triode Q5 is connected with ground, the collector of the triode Q5 is respectively connected with the cathode of the red indicator light LED2 and the cathode of the horn LB1, and the anode of the red indicator light LED2 and the anode of the horn LB1 are respectively connected with a power supply of +24V through the resistor R58.

In a fourth embodiment, on the basis of the first embodiment, when the time of the timing switch K1 reaches or the fault determination unit determines that the fault occurs, the controllable transmission unit turns on the photocoupler U1, turns on the diode D4, applies +5V voltage to the control electrode of the thyristor VTL2 to trigger the thyristor VTL2 to turn on, couples the dc voltage signal output by the signal acquisition unit through the capacitor C5, couples the dc voltage signal through the resistor R10 and the resistor R11, biases the dc voltage signal to the base of the transistor Q2, primarily modulates the frequency of the capacitor three-point oscillator circuit composed of the transistor Q2, the capacitor C6, the capacitor C7 and the inductor L3, that is, modulates the signal output by the signal acquisition unit into a high-frequency signal, and changes any parameter of the capacitor C6, the capacitor C7 and the inductor L3, so as the frequency of the high-frequency signal after modulation may be interfered by other frequency signals, the transistors Q2, the inductor L1 and the inductor L2 are arranged, The resonance circuit with the inductor L3, the capacitor C13 and the variable capacitance diode DC1 as the core further resonates with the frequency component of the modulated high-frequency signal to generate the optimal transmission frequency required to avoid the interference of other frequency signals to the transmitter, meanwhile, the capacitor C13 and the variable capacitance diode DC1 which are connected in series and in parallel with the inductor L2 filter the clutter signal existing in the high-frequency signal, wherein, a frequency selection network consisting of a triode Q3, capacitors C8 and C9 and a resistor R13 is arranged to select the frequency and feed back to the base of the triode Q2 to ensure the stability of the high-frequency modulation signal applied to the transmitter, and finally, the transmitter transmits the high-frequency modulation signal to a remote monitoring terminal, the circuit structure is simple, the transmitter transmits regularly when the switch machine indicates that the width signal of the notch is normal, the transmitter transmits the signal immediately when the notch width signal is abnormal, the occupied channel transmission resource of real, the circuit comprises a thyristor VTL2, a timing switch K1, the anode of the thyristor VTL2, the left end of the timing switch K1 is connected with the output end of an operational amplifier AR1, the control electrode of the thyristor VTL2 is respectively connected with the cathode of a diode D4 and the pin 3 of a photoelectric coupler U1, the pin 4 and the pin 1 of the photoelectric coupler U1 and the anode of a diode D4 are connected with +5V of a power supply, the pin 2 of the photoelectric coupler U1 is connected with the collector of a triode Q5, the anode of the thyristor VTL2 is respectively connected with the right end of the timing switch K2 and one end of a capacitor C2, the other end of the capacitor C2 is respectively connected with one end of a resistor R2, one end of a ground resistor R2 and the base of a triode Q2, the emitter of the triode Q2 is respectively connected with one end of a ground capacitor C2, one end of a ground resistor R2 and one end of an inductor L2, and one end of the collector of the other end of the capacitor C2 are respectively connected with the other end of the ground resistor C2, One end of a resistor R9, the other end of a resistor R9, the other end of a capacitor R10 and one end of a grounded capacitor C10 are all connected with +5V, the other end of an inductor L2 is respectively connected with one end of a capacitor C7, the anode of a varactor DC1 and one end of an inductor L1, the other end of a capacitor C7 and the cathode of a varactor DC1 are connected with the ground, the other end of an inductor L1 is connected with one end of a capacitor C12, the other end of a capacitor C12 is respectively connected with one end of a resistor R14 and one end of a capacitor C9, the other end of a resistor R14 is connected with an emitter, the other end of a capacitor C9 is respectively connected with the base of a triode Q3, one end of a resistor R13 and one end of a capacitor C8, the emitter of a triode Q3 is connected with the ground, and the collector of a resistor R13, the other end of a.

When the invention is used specifically, the signal acquisition unit receives a turnout switch machine indication rod gap width signal detected by an eddy current sensor, the signal enters an in-phase amplification circuit consisting of an operational amplifier AR1, a resistor R1, a resistor R2 and a resistor RA for amplification and conditioning after LC filtering, the amplified signal passes through an RC frequency selection circuit consisting of a resistor R4, a resistor R5, a capacitor C2 and a capacitor C3 for frequency selection, the frequency component of a stable direct current voltage signal output by the eddy current sensor is enabled to pass, the rest frequency components are blocked, when the signal amplitude after frequency selection is higher than the voltage stabilization value of a voltage stabilization tube Z1 by 5V, the voltage stabilization tube Z1 is broken down, the signal is applied to the base electrode of a triode Q1, the CE junction resistance of the triode Q1 is changed, the resistance value of the feedback resistor R1 of the operational amplifier AR1 is reduced, the amplification factor is further reduced, the abnormal high potential signal is further reduced, and when the signal amplitude after frequency selection is lower than the voltage stabilization value of a negative voltage stabilization tube Z1, after negative voltage is reversed through an electrolytic capacitor E1, namely, positive voltage is fed back to a non-inverting input end of the operational amplifier AR1 through a resistor RB, and then input abnormal low potential signals are improved, so that signals output by the operational amplifier AR1 are within the range of 0-5V, one path of signals enter a signal controllable transmission unit, the other path of signals enter a fault judgment unit when the signals output by the operational amplifier AR1 are higher than voltage 2.5 corresponding to the notch width 2mm, namely when the amplitude of the signals after frequency selection is higher than the regulated voltage value of a voltage regulator tube Z3 by 2.5V, the voltage regulator tube Z3 is broken down, the signals enter an integrator composed of the operational amplifier AR1, a resistor R6, a resistor R7 and a capacitor C4 to calculate the voltage change rate, when the signals are positive and higher than the conducting voltage value of a diode D1 by 0.3V, a thyristor VTL1 is conducted, the signals after frequency selection enter the fault judgment unit, the fault unit receives the output signals of the signal acquisition unit, and the signals enter an operational amplifier 3, a triode Q4 and a high threshold voltage value comparator composed of high threshold voltage values indicates that whether the notch The corresponding voltage is 2.5+0.8V, and simultaneously the voltage enters a hysteresis comparator of low threshold voltage consisting of an operational amplifier AR4, a triode Q6 and the low threshold voltage to judge whether the width of a rod gap is lower than the voltage 2.5-0.8V corresponding to 2-0.5mm, when the voltage is higher than the low threshold voltage and the voltage is lower than the high threshold voltage, the small interference during the high-low level switching is eliminated, the two hysteresis comparators output stable low levels, an AND circuit consisting of a diode D4, a diode D5 and a resistor R21 connected with a power supply outputs low levels so that the power supply +5V, a green indicator light LED1, a resistor R19 and low levels (ground) form a loop for current circulation, the green indicator light LED1 is on to indicate that a turnout switch machine indicates that the width of the rod gap is normal, and when the voltage is lower than the low threshold voltage or the low threshold voltage is higher than the high threshold voltage, the hysteresis comparator of the corresponding high threshold voltage or the hysteresis comparator of the low threshold voltage outputs stable high level, the OR gate circuit composed of a diode D2, a diode D3 and a grounding resistor R20 outputs high level to drive a triode Q5 to be conducted, the potential of a collector is the ground, a power supply +5V, a resistor R17 and a green indicator light LED1 which are connected in series, the ground, a resistor R18 and a horn LB which are connected in series and are connected in series with the power supply +5V, a current circulation loop is formed, a red indicator light LED2 is turned on, the horn LB gives an alarm to indicate that a turnout switch shows that the width of a rod gap is abnormal, when the time of a timing switch K1 is up or a fault judgment unit judges that the turnout switch is abnormal, a controllable transmission unit conducts a photoelectric coupler U1 and a diode D4, the voltage of +5V is applied to a control electrode of a thyristor VTL2 to trigger the thyristor VTL2 to conduct, a direct current voltage signal output by a signal acquisition unit is coupled through a capacitor C5, a resistor R10 and a resistor R11 are biased and applied to a base electrode of a triode Q73742, The capacitance three-point type oscillating circuit formed by an inductor L3 primarily frequency modulates the output signal of the signal acquisition unit into a high-frequency signal, changes any parameter of a capacitor C6, a capacitor C7 and an inductor L3, can adjust the frequency of the high-frequency signal, because the modulated high-frequency signal has noise signals and can also be interfered by other frequency signals, a resonant circuit taking a triode Q2, an inductor L1, an inductor L2, an inductor L3, a capacitor C13 and a varactor DC1 as cores is further resonated with the frequency component modulated into the high-frequency signal to generate the required optimal transmission frequency, so as to avoid the interference of other frequency signals to the transmitter, meanwhile, the capacitor C13 and the varactor DC1 connected in series and parallel with the inductor L2 filter the noise signals existing in the high-frequency signal, wherein a frequency selection network formed by the triode Q3, the capacitors C8, the C9 and the resistor R13 is arranged to select the frequency and feed back to the base of the triode Q2 so as to ensure the stability of the high-frequency modulated, and finally, the signals are transmitted to the remote monitoring terminal by the transmitter, the circuit structure is simple, the transmitter is used for sending the signals at regular time when the signals of the notch width of the indication rod of the turnout switch machine are normal, and the transmitter is used for sending the signals immediately when the signals are abnormal, so that the channel transmission resources occupied by real-time transmission are saved, and the timeliness of processing abnormal information is improved.

Claims

1. A turnout switch machine indication rod fault monitoring system is characterized in that a turnout switch machine indication rod gap width signal detected by an eddy current sensor is processed by a signal acquisition unit, a fault judgment unit and a controllable transmission unit and then transmitted to a remote monitoring terminal;

the signal acquisition unit receives a signal of the gap width of a switch machine indicating rod detected by an eddy current sensor, the signal is amplified and conditioned through an operational amplifier AR1 after being filtered by LC, a triode Q1 is arranged to reduce an abnormal high potential signal and an electrolytic capacitor E2 is arranged to improve an abnormal low potential signal, so that a signal output by the operational amplifier AR1 is within the range of 0-5V, then one path of the signal enters a signal controllable transmission unit, when the signal output by the operational amplifier AR1 is higher than the voltage 2.5 corresponding to the gap width of 2mm, an integrator taking the operational amplifier AR1 as the core calculates the voltage change rate, when the voltage change rate is positive and higher than the conduction voltage value of a diode D1 by 0.3V, a thyristor VTL1 is conducted, the signal output by the operational amplifier AR1 enters a fault discrimination unit, the fault discrimination unit judges whether the voltage indicating the gap width of the rod is within the voltage 2.5 +/-0.8V corresponding to the gap width of 2 +/-0.5 mm through a double hysteresis comparator consisting of the operational, when the time of the timing switch K1 reaches or the fault discrimination unit judges that the fault occurs abnormally, the signal output by the operational amplifier AR1 is subjected to preliminary frequency modulation by an oscillating circuit with a triode Q2, a capacitor C6 and a capacitor C7 as cores, and a resonant circuit with the triode Q2, an inductor L1-an inductor L3, a capacitor C13 and a varactor DC1 as cores is further resonated with a frequency component which is modulated into a high-frequency signal to generate the optimal transmission frequency required by the requirement, and the optimal transmission frequency is transmitted to the remote monitoring terminal through the transmitter.

2. The switch machine indication rod fault monitoring system of claim 1, wherein the signal collecting unit comprises an inductor L1, one end of the inductor L1 is connected with a switch machine indication rod gap width signal detected by an eddy current sensor, the other end of the inductor L1 is connected with a non-inverting input end of an operational amplifier AR1 and one end of a resistor RB through a resistor RA, an inverting input end of an operational amplifier AR1 is connected with one end of a resistor R1, one end of a grounding resistor R2 and a collector of a triode Q1, the other end of the resistor R1 is connected with an output end of the operational amplifier AR1 and an emitter of a triode Q1 of a resistor R4, the other end of the resistor R4 is connected with one end of a capacitor C2, the other end of the capacitor C2 is connected with a cathode of a regulator Z1, an anode of a regulator Z2, a cathode of a regulator Z3, one end of a grounding resistor R5, one end of a grounding capacitor C3, One end of a resistor R3, the anode of a voltage regulator tube Z1 is connected with the base of a triode Q1, the cathode of a voltage regulator tube Z2 and the cathode of a grounding electrolytic capacitor E1 are connected with the other end of a resistor RB, the other end of a resistor R3 is connected with the anode of a thyristor VTL1, the anode of a voltage regulator tube Z3 is respectively connected with the inverting input end of an operational amplifier AR2, one end of a resistor R6 and one end of a capacitor C4, the non-inverting input end of an operational amplifier AR2 is connected with the ground through a resistor R7, the output end of the operational amplifier AR2 is respectively connected with the other end of a resistor R6, the other end of a capacitor C4 and the anode of a diode D1, the cathode of a diode D1 is respectively connected with one end of a resistor R8, the anode of a grounding electrolytic capacitor E2 and the control electrode of a thyristor VTL 1.

3. The switch point indication rod fault monitoring system as claimed in claim 1, wherein the fault determination unit comprises operational amplifiers AR3 and AR4, a non-inverting input terminal of the operational amplifier AR3 and an inverting input terminal of the operational amplifier AR4 are connected to a cathode of the thyristor VTL1, an inverting input terminal of the operational amplifier AR3 is connected to one end of the resistor R15 and one end of the resistor R16, the other end of the resistor R16 is connected to an upper end and an adjustable end of the potentiometer RP1, an emitter of the transistor Q4 and a non-inverting input terminal of the operational amplifier AR4, an output terminal of the operational amplifier AR3 is connected to a base of the transistor Q4, an anode of the diode D2 and a cathode of the diode D4, an output terminal of the operational amplifier AR4 is connected to a base of the transistor Q6, an end of the resistor R21, an anode of the diode D3 and a cathode of the diode D5, and an anode of the diode D4 is connected to an anode of the diode D5, One end of a resistor R19, one end of a resistor R21, the other end of a resistor R19 is connected with the negative electrode of a green indicator light LED1, the positive electrode of the green indicator light LED1, the other end of the resistor R21, the collector of a triode Q4 and the other end of a resistor R15 are all connected with +5V, the collector of a triode Q6 and the other end of a resistor R21 are connected with +0.3V, the lower end of a potentiometer RP1 is connected with ground, the negative electrode of a diode D2 is respectively connected with the negative electrode of a diode D3, one end of a grounded resistor R20 and the base of a triode Q5, the emitter of a triode Q5 is connected with ground, the collector of a triode Q5 is respectively connected with the negative electrode of a red indicator light LED2 and the negative electrode of a horn LB1, and the positive electrode of a red indicator light LED2 and the positive electrode of a horn LB1 are respectively connected with +.

4. The switch point indication rod fault monitoring system as claimed in claim 1, wherein the controllable transmission unit comprises a thyristor VTL2, a timing switch K1, the anode of the thyristor VTL2 and the left end of the timing switch K1 are connected with the output end of the operational amplifier AR1, the control electrode of the thyristor VTL2 is respectively connected with the cathode of a diode D4 and a pin 3 of a photocoupler U1, a pin 4 and a pin 1 of the photocoupler U1 and the anode of a diode D4 are connected with a power supply +5V, a pin 2 of the photocoupler U1 is connected with the collector of a triode Q5, the anode of the thyristor VTL2 is respectively connected with the right end of the timing switch K1 and one end of a capacitor C5, the other end of the capacitor C5 is respectively connected with one end of a resistor R5, one end of a ground resistor R5857323 and the base of a triode Q2, the emitters of a triode Q2 are respectively connected with one end of a ground capacitor C6, one end of a ground resistor R12 and one end of a capacitor C, the collector of the transistor Q2 is connected to the other end of the capacitor C7, the one end of the inductor L2, and the one end of the inductor L3, the other end of the inductor L3 is connected to the one end of the ground capacitor C11 and the one end of the resistor R9, the other end of the resistor R9, the other end of the capacitor R10, and the one end of the ground capacitor C10, respectively, the power supply +5V, the other end of the inductor L2 is connected to the one end of the capacitor C7, the anode of the varactor DC1, and the one end of the inductor L1, the other end of the capacitor C1 is connected to the ground, the cathode of the varactor DC1 is connected to the ground, the other end of the inductor L1 is connected to the one end of the capacitor C1, the other end of the capacitor C1 is connected to the one end of the resistor R1 and the one end of the emitter, the other end of the capacitor C1 is connected to the base of the transistor Q1, the resistor R1, the one end of the transistor Q1, the emitter, The other end of the capacitor C8 and the base of the triode Q2.