JP2007210539A - Ats ground device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an ATS ground device capable of improving reliability of a relay contact point by cleaning a relay contact point capable of changing a frequency of an ATS ground unit with a simple constitution. <P>SOLUTION: A coil L is connected in parallel with a capacitor C, and to change a resonance frequency of a ground unit, control relays RY1-RY3 switching the connection between a plurality of capacitors C1-C3 and the capacitor C of a ground unit 2 by frequency electing signals SG1-SG3 are actuated. When respective relay contact points RY1-1 to RY3-1 connected in series with a plurality of the capacitors C1-C3 are closed, a current larger than a fine current flowing when the ground unit 2 is magnetically coupled with an onboard element 4 via the resistance of other relay contact points RY1-2 to RY3-2 of the control relays RY1 to RY3 is made to flow in the respective relay contact points RY1-1 to RY3-1, so as to clean surfaces of the respective relay contact points RY1-1 to RY3-1. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to an improvement in the reliability of an ATS ground device used for various types of train control such as train stop control and railroad crossing control, particularly a relay contact that varies the frequency of the ground unit.

  For example, an automatic train stop device (ATS) is provided with an oscillation circuit unit by an amplifier having a coil of the vehicle upper as a feedback circuit as an on-board device, and a ground unit consisting of a resonance circuit of a constant frequency is provided on the ground unit. When the train's upper element passes over the ground element, the frequency of the oscillation circuit section is changed to the frequency of the resonance circuit set in the ground element, and the frequency change method is used to issue a stop command to the train. Has been. In order to increase the amount of information sent from the ground unit, for example, Patent Document 1 discloses an ATS in which resonance frequencies are multiplexed. As shown in the circuit diagram of FIG. 2, for example, the ATS ground device 1a that multiplexes the frequencies includes a ground element 2 including a coil L and a capacitor C0, and capacitors C1 to C3, which are relays of control relays RY1 to RY3, respectively. Resonant frequency by having a ground element control relay unit 3a connected in parallel with the capacitor C0 of the ground element 2 via the contacts RY1-1 to RY3-1 and switching the control relays RY1 to RY3 by the frequency selection signals SG1 to SG3 To change. The train has a receiving frequency channel comprising filters 7a to 7d, rectifiers 8a to 8d and relays f1R to f4R on the output side of the oscillation circuit section 6 by the amplifier 5 using the coil of the vehicle upper 4 as a feedback circuit according to the resonance frequency. Provided. For example, the control relay RY1 is operated by the frequency selection signal SG1, the relay contact RY1-1 is closed, the capacitor C1 is connected in parallel with the capacitor C0, and the ground element 2 and the vehicle upper element 4 in which the frequency f2 is set are obtained. When electromagnetically coupled, the coil of the relay f2R having the frequency f2 is excited by the reception signal of the vehicle upper 4, and the coils of the other relays f1R, f3R, and f4R are de-energized, and information corresponding to the frequency f2 is obtained. Output. In this way, information on the frequency determined by the capacitors C0 to C3 is sent from the ground unit 2 to the train.

  In this ATS, since the time for electromagnetic coupling between the vehicle upper element 4 and the ground element 2 is as short as several milliseconds, the contact reliability of the relay contacts RY1-1 to RY3-1 is improved as compared with general relay control. Need to increase. On the other hand, the ambient environment in which the control relays RY1 to RY3 are used is often in a poor place that is easily affected by temperature, vibration, and harmful gases such as exhaust gas, and the contacts become dirty. Also, in an environment where there is a temperature difference between daytime and nighttime, contamination of the contacts is accelerated by condensation. Furthermore, the long-term temperature cycle accelerates the induction of inorganic gas and organic gas from internal components and the like, further accelerating the deterioration of the contacts.

  Even if it is attempted to remove the contamination of the contacts by the operation of the control relays RY1 to RY3, when the relay contacts RY1-1 to RY3-1 are closed, there is no voltage between the contacts, and the ground element 4 and the vehicle upper element 2 are The energy flowing through the relay contacts RY1-1 to RY3-1 when electromagnetically coupled is small, and there is no voltage between the contacts after the relay contacts RY1-1 to RY3-1 are closed, and a contact cleaning operation cannot be expected.

In order to remove the contamination of the contact through which such a minute current flows and stabilize the contact resistance of the contact, for example, as shown in Patent Document 2 and Patent Document 3, when the contact is closed, the minute current that normally flows through the contact The contact surface is cleaned by a coherer effect by supplying a larger flash current for a certain time, or the contact surface is cleaned by supplying a flash current when opening the contact.
Japanese Patent No. 2876003 JP-A-6-94758 JP 2001-84860 A

  As described above, when the contact is closed or when the contact is opened, a flash current larger than the steady current is supplied to clean the surface of the contact. It is necessary to provide a control means or the like having a disadvantage that the apparatus becomes complicated and expensive.

  An object of the present invention is to provide an ATS ground device that can improve the reliability of a relay contact by improving the reliability of the relay contact by improving the shortcoming and cleaning the relay contact that varies the frequency of the ground element with a simple configuration. To do.

  The ATS ground device of the present invention has a ground element and a ground element control relay unit, and the ground element has a coil and a capacitor connected in parallel, and the ground element control relay unit includes a plurality of capacitors C1 to Cn and each capacitor. A plurality of control relays RY1 to RYn operated by frequency selection signals SG1 to SGn corresponding to C1 to Cn are provided, and the plurality of capacitors C1 to Cn are relay contacts RY1-1 to RYn of the corresponding control relays RY1 to RYn, respectively. -1 is connected in parallel with the capacitor of the ground element, and the connection portions of the capacitors C1 to Cn and the relay contacts RY1-1 to RYn-1 are the other relay contacts RY1-2 to RYn of the control relays RY1 to RYn. -2 and the resistor are connected to the input terminals of the frequency selection signals SG1 to SGn, and the grounding capacitor and each relay contact RY1-1 to RY Connection of -1, characterized in that connected to the common terminal.

  In the ATS ground device of the present invention, in order to change the resonance frequency of the ground element when the coil and the capacitor are connected in parallel, each control relay that switches the connection between the plurality of capacitors and the ground element capacitor is operated by the frequency selection signal. When each relay contact connected in series with a plurality of capacitors is closed, the surface of each relay contact is cleaned by passing a current larger than the minute current that flows when the ground element and vehicle element are electromagnetically coupled to each relay contact. It is possible to improve the reliability of the relay contact by preventing the contact deterioration.

  In addition, other relay contacts of the control relay that switches the resonance frequency and the relay contacts connected in series with each capacitor using the voltage of the frequency selection signal are cleaned, so the existing equipment is used to connect in series with each capacitor. The contact resistance of the relay contact can be stabilized.

  FIG. 1 is a circuit diagram showing a configuration of an ATS ground apparatus according to the present invention. As shown in the figure, the ATS ground device 1 includes a ground element 2 and a ground element control relay unit 3. The ground element 2 has a coil L and a capacitor C0 connected in parallel. The ground control relay unit 3 includes capacitors C1 to C3 and control relays RY1 to RY3 that are operated by frequency selection signals SG1 to SG3. Capacitors C1 to C3 are connected in parallel with the capacitor C0 of the ground element 2 via relay contacts RY1-1 to RY3-1 of the control relays RY1 to RY3, respectively. The connection portion between the capacitor C1 and the relay contact RY1-1 is connected to the input terminal of the frequency selection signal SG1 via the other relay contact RY1-2 and the resistor R1 of the control relay RY1, and the connection between the capacitor C2 and the relay contact RY2-1. Is connected to the other relay contact RY2-2 of the control relay RY2 and the input terminal of the frequency selection signal SG2 via the resistor R2, and the connection portion of the capacitor C3 and the relay contact RY3-1 is another relay contact of the control relay RY3. It is connected to the input terminal of the frequency selection signal SG3 via RY3-2 and resistor R3. Moreover, the connection part of the capacitor | condenser C0 of the ground element 2 and the capacitors C1-C3 is connected to the common terminal of a frequency selection signal.

  The ground element control relay unit 3 operates and restores the control relays RY1 to RY3 in response to the frequency selection signals SG1 to SG3, thereby switching the connection between the capacitors C1 to C3 and the capacitor C0 of the ground element 2 to change the resonance frequency. .

  In the ground control relay unit 3, for example, when the frequency selection signal SG1 is input, the control relay RY1 operates to close the relay contact RY1-1, connect the capacitor C1 in parallel with the capacitor C0, and close the relay contact RY1-2. . When the relay contact RY1-2 is closed, the voltage of the frequency selection signal SG1 is applied between the resistor R1, the relay contact RY1-2, the relay contact RY1-1, and the common terminal, and the resistor R1, the relay contact RY1-2, and the relay contact RY1. Current flows between -1 and the common terminal. When this current flows through the relay contact RY1-1, the resistance value of the resistor R1 is set so that a current of several mA, for example, 10 mA flows through the relay contact RY1-1. Thus, when the frequency selection signal SG1 is input and the control relay RY1 operates, a minute current that flows when the vehicle upper element is electromagnetically coupled to the ground element 2 to the relay contact RY1-1 connected in series with the capacitor C1. By flowing a larger current, the surface of the relay contact RY1-1 can be cleaned, deterioration of the contact can be prevented, and the reliability of the relay contact RY1-1 can be improved. From the viewpoint of preventing electrolytic corrosion, it is desirable that the current flowing through the resistor R1, the relay contact RY1-2, and the relay contact RY1-1 by the frequency selection signal SG1.

  Also, the relay contacts RY1-1 to RY3 connected in series with the capacitors C1 to C3 using the relay contacts RY1-2 to RY3-2 of the control relays RY1 to RY3 for switching the resonance frequency and the voltages of the frequency selection signals SG1 to SG3. Since -1 is cleaned, the contact resistances of the relay contacts RY1-1 to RY3-1 can be stabilized using existing equipment.

It is a circuit diagram which shows the structure of the ATS ground apparatus of this invention. It is a circuit diagram which shows the structure of the ATS apparatus which multiplexed the frequency.

Explanation of symbols

1; ATS ground device, 2; ground element, 3; ground element control relay unit, 4;
5; amplifier, 6; oscillation circuit section, 7; filter, 8; rectifier,
RY1 to RY3; control relay, f1R to f4R; relay, R1 to R3; resistance,
SG1 to SG3; frequency selection signals.

Claims (1)

It has a ground element and a ground element control relay part,
The ground unit has a coil and a capacitor connected in parallel,
The ground control relay unit includes a plurality of capacitors C1 to Cn and a plurality of control relays RY1 to RYn operated by frequency selection signals SG1 to SGn corresponding to the capacitors C1 to Cn. Are connected in parallel with the capacitors of the ground element via the relay contacts RY1-1 to RYn-1 of the corresponding control relays RY1 to RYn, and the connection portions of the capacitors C1 to Cn and the relay contacts RY1-1 to RYn-1 Are connected to the input terminals of the frequency selection signals SG1 to SGn through resistors and other relay contacts RY1-2 to RYn-2 of the control relays RY1 to RYn, and the capacitors of the ground element and the relay contacts RY1-1 to RYn The ATS ground device is characterized in that the connection portion of -1 is connected to a common terminal.

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