JP3020268B2 - Method and apparatus for predicting non-changeability of electric point machine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial applications]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for predicting an inability to convert an electric switch in an electric switch that converts and locks a switch in a railway.

[Prior art]

The conversion mechanism of the electric pointing machine is provided with a friction clutch (hereinafter referred to as a clutch). When an overload occurs, the clutch idles to prevent the motor from burning. Therefore, the conversion force of the electric point machine is determined by the idling torque of the clutch. The magnitude of the idling torque of the clutch is adjusted to an appropriate value in consideration of the magnitude of the load when the movable part of the switch is changed and the prevention of reversal at the end of the change. However, the magnitude of the load and the torque of the clutch fluctuate due to environmental changes such as weather and temperature. Therefore, regular surveys and coordination are essential. It is considered most probable that the magnitude of the load uses the motor current during conversion as a parameter, and the torque adjustment of the clutch has conventionally been performed based on the motor current value during conversion.

[Problems to be solved by the invention]

In this case, it is dangerous because many people and time are required to select a time during which the train is not approaching and go out to the place, to keep track of the train and to measure it, and to work near the rails. For this reason, it has been desired to reduce the number of investigations and adjustments by realizing a state monitoring device for an electric switch by automating the measurement and establishing a means for predicting the impossibility of conversion. However, the motor current is the most promising parameter for predicting the impossibility of conversion, but there are factors that cause the motor current to fluctuate other than the size of the load.

[Means for Solving the Problems]

The present invention solves the above problem by measuring the motor current and the power supply voltage of the electric point machine, and artificially detecting the inability to convert in advance by means of inferring the clutch torque at an arbitrary power supply voltage from these values. Then, an estimated value of the torque at which the clutch idles is inferred and the value is stored. Next, the electric point machine is returned to the normal conversion state by the same inference means, and the clutch torque during the conversion is inferred every time the conversion is performed, and the value is stored in advance. Compare with the inferred torque value,
The approaching degree is displayed as a risk level, and when the risk level becomes high (value approaches), an alarm is issued and the maintenance person is notified.

[Action]

By comparing the estimated clutch torque value during normal conversion with the estimated clutch torque value when the clutch is idling when it is impossible to convert, it is quantitative to determine how easily the clutch is likely to idle to display as a degree of danger. Understand
It is possible to determine whether or not the vehicle is in a state where it is easy to make a conversion impossible.

【Example】

An embodiment of the present invention will be described. A means for measuring and storing the motor current and the current voltage of the electric point machine, inferring the clutch torque at an arbitrary power supply voltage, and a monitoring device for storing the inferred value are provided. This device is provided with a status switch for manually informing the monitoring device of the status when the electric switch cannot be changed artificially. The measurement by the monitoring device is started by detecting the starting current of the motor of the electric point machine, and starts the measurement. When the motor current disappears, the measurement is finished. After the maintenance person adjusts the clutch of the electric switch, the electric switch is artificially disabled, and the status switch is turned on to notify the monitoring device. Then, the motor power of the electric switch is turned on, the power supply voltage and the motor current at that time are measured, and the clutch torque at an arbitrary power supply voltage (for example, 105 V) is stored as an inference value from these values. Next, return to the normal switching state, and turn the status switch to OF
F to notify that it can be converted to a monitoring device. The power supply voltage and motor current at that time are measured each time the electric point machine is converted, and the clutch torque (clutch torque during conversion) at an arbitrary power supply voltage (for example, 105 V) is stored from these values as an inference value, The degree of approach to the stored estimated value of the slipping clutch torque is displayed as the degree of risk. At this time, if the degree of danger is high, an alarm is issued to notify that the impossibility of conversion is likely to occur, so that only those prone to impossibility of conversion need to be noted. One example of inferring the clutch torque during the shift and the clutch torque during idling will be described. The relationship between the motor current, the power supply voltage, and the motor torque is stored, and the motor torque value is inferred from the motor current and the power supply voltage. Convert to torque value. Regarding the estimation of the clutch torque, the clutch torque is easily obtained by the product of the motor torque and the gear ratio. For example, the number of gear teeth on the motor shaft side of the electric pointing machine is 17
When the number of gear teeth on the clutch side is 76, the clutch torque can be obtained by multiplying the motor torque by 76/17. In addition, the manufacturer of the electric point machine has measured data on the relationship between the motor current, the power supply voltage and the motor torque for each electric point machine. And the motor torque can be obtained from the motor current and the power supply voltage.

【The invention's effect】

It is possible to automatically and quantitatively determine a case in which a conversion failure may occur without relying on the feeling of a maintenance person.

[Brief description of the drawings]

FIG. 1 is a flow chart showing a method for predicting the inability to convert according to one embodiment of the present invention.

Continuation of the front page (58) Field surveyed (Int.Cl. ⁷ , DB name) B61L 5/00-5/08 E01B ^7/ 00-7/20

Claims (2)

(57) [Claims] An inference is made when a motor current and a power supply voltage of an electric switch are measured and means for inferring a clutch torque at an arbitrary power supply voltage from these values are artificially disabled in advance. After that, the electric point machine makes an inference at every turnover by the same inference means, and obtains a degree that the inferred value at the time of the normal turn comes close to the inferred value at the time of no turnover, and determines the degree of danger. A method for predicting an inability to convert an electric point machine, comprising: 2. A means for measuring a motor current and a power supply voltage of an electric switch and inferring a clutch torque at an arbitrary power supply voltage from these values by artificially in advance when it is impossible to artificially change the clutch torque. After that, the electric point machine makes an inference at every turnover by the same inference means, and obtains a degree that the inferred value at the time of the normal turn comes close to the inferred value at the time of no turnover, and determines the degree of danger. An unswitchable prediction device for an electric point machine characterized by representing.