JPH0440642B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a track level.
Generally, in a track level using a battery as a power source, it is necessary to maintain the power supply voltage always above a specified value in order to correctly display the track level and cant amount. Therefore, if the battery is exhausted and the voltage drops below the specified voltage, the battery must be immediately replaced with a new one. Conventionally, when a battery is used as a power source for a portable device, the battery voltage drop is indicated by directly measuring the battery voltage using an analog meter 5, as shown in Figures 1, 2, and 3.
0 or the indicator light 5 indicates a decrease in battery voltage.
This was done by displaying a number 1 by lighting it up. However, in the case of a system in which the battery voltage is directly displayed with the analog meter 50, a dedicated meter is required, which increases the number of circuit components, which not only increases costs, but also has the disadvantage that the meter is susceptible to vibrations and the like.

In addition, when the battery voltage is directly displayed on a display, it is necessary to separately display the usage limit.
Further, in the method of displaying a decrease in battery voltage by lighting the indicator light 51, it is possible to determine that the battery voltage has decreased, but there are drawbacks such as the inability to determine the usage limit. There is also a method of displaying the capacity of the battery by the display area, such as the electronic watch disclosed in Japanese Patent Application Laid-Open No. 55-22154, but it is unclear when to replace or charge the battery. There were some drawbacks, such as the lack of clarity.

Furthermore, the digital inclination angle measuring device of the invention disclosed in Japanese Patent Application Laid-Open No. 54-135562 is designed to have its bottom surface aligned with a horizontal plane before use, that is, the axis of the rolling shaft 3 and the weight It is necessary to always adjust so that the voltages (E~E0) and (E'~E0) of potentiometer 1 are equal when the straight line connecting the center of gravity of 4 intersects the bottom surface 5 at right angles. Yes, in this case, a reference plane (horizontal plane) is required, and
This level had the disadvantage that it could not detect cant and could not adjust the zero point in the cant section.

The present invention was made in order to eliminate the above-mentioned drawbacks, and a voltage detector detects the battery voltage, and when the battery voltage falls below a certain value, a voltage drop display symbol is displayed on the liquid crystal display. By checking that the constant output voltage value of the constant voltage device, which is displayed on the display when not measuring, has started to decrease as the battery wears out, it is possible to clarify when it is time to replace the battery. This makes it possible to replace the battery most economically, eliminates accidents such as not being able to use the track level when desired due to battery life, and eliminates the need for zero point adjustment of the track level since there is no reference surface. The purpose of the present invention is to provide a leveling device for a track that can be easily used in any cant section.

Hereinafter, one embodiment of the present invention will be described in detail with reference to the drawings.

Figure 4 is a front view of one embodiment of the present invention, Figure 5 is a block diagram of the electrical control system in Figure 4, Figure 6 is a plan view of the display box, and Figure 7a is when the power supply is normal. The cant display diagram of the display during measurement, Figure 7b is the display diagram of the display when not measuring when the power supply is normal, and Figure 7c shows that the battery discharge voltage is below the voltage drop display voltage.
Also, the display diagram of the display when not measuring when the voltage is higher than the operating limit voltage, and Figure 7d is the display diagram of the display when not measuring when the battery discharge voltage is lower than the operating limit voltage. Figure 8 is an operating curve diagram.

The same numbers in FIGS. 4 to 6 indicate the same members.

A track level 9 according to an embodiment of the present invention shown in FIGS. 4 to 6 includes a level detection bar 10 and an indicator box 1.
It consists of 1.

The level detection bar 10 includes contact portions 14 and 15 having bottom plates 12 and 13 attached to both ends thereof, which contact the left and right rails of the track, respectively, and the contact portions 14 and 15.
An inspection bar 17 consisting of a gripping part 16 that connects the
, a level detector 18 that is attached to the contact portion 14 of the inspection bar 17 and electrically detects the level of the track and positive/negative cant; and the contact portion 1 of the inspection bar 17.
4 and is composed of a level detector 18 and a connected receptacle 19. As a level detector, a commercially available tilt angle detector may be used, which converts the displacement of a pendulum immersed in damper oil from a vertical position to a horizontal plane into voltage using a magnetoresistive element or a differential transformer. good.

The display box 11 inputs the outputs of the zero point adjuster 20 that adjusts the zero point of the track level gauge 9 and the level detector 18 of the level detection bar 10, removes high frequency components due to disturbances such as vibrations, and outputs the output. low pass filter 2
1, the output of the zero point adjuster 20, and the output of the low-pass filter 21, and a differential amplifier 22 that amplifies and outputs the difference, a power supply 26, and a power supply 26 that stabilizes the voltage of the power supply 26 and sets the level. Constant voltage device 41 that supplies constant voltage to the detector 18 and zero point regulator 20
The a contact side is connected to the differential amplifier 22, the b contact side is connected to the voltage regulator 41, and the differential amplifier 2 is connected at the time of measurement.
2, a measurement switch 42 selects the output of the voltage regulator 41 when not measuring, an AD converter 23 that converts the analog quantity selected by the measurement switch 42 into a digital quantity, and outputs the digital quantity.
A decoder 24 inputs the output of the AD converter 23, converts it into an input signal of a liquid crystal display 25, and outputs it, and a liquid crystal display 25 inputs the output signal of the decoder 24 and displays it digitally.
a voltage detector 43 that detects the voltage of the power supply device 26 and outputs a voltage drop signal to display a voltage drop display symbol on the liquid crystal display 25 when the power supply voltage falls below a certain value; and a power switch 27. and a connecting cable 29 having a plug 28 attached to one end thereof to be connected to the receptacle 19 of the level measuring bar 10.

The power supply device 26 may be used by converting a battery or an external AC power source into DC power using a rectifier (not shown).

Next, the operation of the track level 9 having the above configuration will be explained.

First, connect the plug 28 of the connection cable 29 of the display box 11 to the receptacle 19 of the level detection bar 10.
When the power supply switch 27 is closed, voltage is applied from the power supply device 26 to the voltage detector 43, low-pass filter 21, differential amplifier 22, AD converter 23, decoder 24, and constant voltage device 41, respectively. The voltage stabilized by the constant voltage device 41 is applied to the level detector 18 via the zero point adjuster 20 and the plug 28. Next, measure switch 4
Press 2. At this time, the measurement switch 42 connects the input of the AD converter 23 to the output side of the differential amplifier 22. Then, if necessary, the zero point of the track level gauge 9 is adjusted by the zero point adjuster 20.

In this case, when adjusting the zero point in the cant section, the bottom plates 12 and 13 of the contact parts 14 and 15 are brought into contact with the upper surfaces of the rail heads on the left and right sides of the track, and the indicator 25
From the value displayed on the display 25 (e.g. 8 mm), then reverse the contact of the bottom plates 12 and 13 at the same position (relative to the left and right rails) and the value displayed on the display 25 at that time (e.g. -2 mm). 8-(-2)]/2=
Calculate 5 and attach the bottom plate 1 again in the same position as above.
2 and 13 in contact with the top surface of the rail head and display 25
The zero point in the cant section can be easily adjusted by using the zero point adjuster so that the + and - values displayed in the figure are each 5 mm. Next, grip the grip part 16 of the level detection bar 10,
When the bottom plates 12 and 13 of the contact parts 14 and 15 are placed in contact with the upper surfaces of the heads of the left and right rails of the track, the level detector 18 converts the level and cant of the track into an electrical analog quantity, for example, a voltage. The output is input to the low-pass filter 21. The low-pass filter 21 uses the input from the level detector 18 to filter out high-frequency components caused by disturbances such as vibrations when the level detection bar 10 is placed in contact with the top surface of the rail head and vibrations when a train passes an adjacent track. remove and
It is output to the differential amplifier 22. Differential amplifier 2
2 inputs the output of the low-pass filter 21 and the output of the zero point adjuster 20, amplifies the difference between them, and outputs the amplified difference to the AD converter 23 via the measurement switch 42. The AD converter 23 converts the analog quantity input from the differential amplifier 22 into a digital quantity and outputs it to the decoder 24. The decoder 24 converts the input from the AD converter 23 into an input signal for the liquid crystal display 25 and outputs the signal.

The liquid crystal display 25 inputs the output signal of the decoder 24 and digitally displays the level of the trajectory and positive/negative cant. Therefore, the operator grasps the grip part 16 of the inspection bar 17 of the track level 9 and brings the bottom plates 12, 13 of the contact parts 14, 15 into contact with the top surfaces of the heads of the left and right rails of the track. By simply reading the numerical values displayed on the liquid crystal display 25 of the display box 11, the level and positive/negative cant of the trajectory at that position can be measured. When the measurement switch 42 is returned to its original position (set to the b side), the AD converter 23 is connected to the voltage regulator 41, and the output of the voltage regulator 41 is converted into a digital quantity by the AD converter 23, and sent to the decoder 24. Output. The decoder 24 converts the input from the AD converter 23 into an input signal for the liquid crystal display 25 and outputs the signal. The liquid crystal display 25 receives the output of the decoder 24 and displays the output voltage of the constant voltage device 41.

The constant voltage device 41 outputs a stable constant voltage until the voltage of the power supply device 26 drops to the usable limit voltage, and does not lose its stabilizing function when the voltage of the power supply device 26 falls below the usable limit voltage. Power supply device 26
The output voltage decreases in proportion to the voltage drop. Therefore, when the measurement switch 42 is returned to its original state, that is, when not measuring, the liquid crystal display 25 displays a constant value until the usage limit of the power supply 26 is exceeded, and the voltage drop of the power supply 26 is displayed below the usage limit of the power supply 26. Display a value proportional to .

The voltage detector 43 detects the voltage of the power supply device 26, and displays a voltage drop display symbol (LOW BAT) on the liquid crystal display 25 when the voltage of the power supply device 26 drops below a certain value.

Figure 7a shows the cant when measuring the track level when the discharge voltage of the battery as a power source is higher than the voltage drop display voltage VL (when the power supply is normal) that indicates the state of decrease in the discharge voltage of the power supply. FIG. 7b is a display diagram showing an example of a display when the measured quantity is displayed, and FIG. FIG. 7c is a display diagram showing the display when the display device is configured to display the information, and FIG. Voltage drop display voltage to display the drop status
Constant voltage when the voltage is below VL and above the operating limit voltage VE of the battery discharge voltage required to maintain the constant output voltage of the constant power supply (battery replacement preparation period when the power supply is normal) This is a display diagram showing the output voltage state of the device on a display, and FIG. 7d shows a state in which the discharge voltage of the battery as a power source is decreased when the track level is not measuring. Voltage drop display voltage
Constant voltage when the voltage is below VL and below the operating limit voltage VE of the battery discharge voltage required to maintain the constant output voltage of the constant power supply (when the battery needs to be replaced due to power drop) FIG. 3 is a display diagram showing a display device when displaying the output voltage state (100 or less) of the device. Therefore, in the display shown in figure c, it is necessary to prepare for battery replacement, and as shown in figure d, a low voltage indicator symbol (LOW BAT) is displayed, and if the displayed value falls below 100, replace the battery. There is a need.

FIG. 8 shows the operation when the battery 26' is used in the power supply 26, with the vertical axis representing the battery discharge voltage and the horizontal axis representing the battery discharge time. B is the discharge curve of the battery 26', VS is the initial voltage of the battery 26', VL is the voltage drop display voltage of the battery 26', and VE is the operating limit voltage of the battery 26'. Level detector 18 from battery 26'
By supplying power to the display box 11, the initial voltage Vs of the battery 26' gradually decreases, and when it reaches the voltage drop display voltage VL, the voltage detector 43 is activated and the voltage drop display symbol ( LOW BAT).

When the voltage of the battery 26' further decreases and reaches the service limit voltage VE, the voltage regulator 41 loses its stabilizing function and its output begins to fluctuate in a downward direction.

Therefore, after the voltage of the battery 26' drops to VL, the voltage detector 43 is activated, and the voltage drop display symbol is displayed on the liquid crystal display 25, the voltage of the battery 26' is lowered to VL.
If the battery 26' is replaced within the discharge time until the voltage of the battery 6' drops to VE, that is, the time T1 when the battery 26' should be replaced, the track level and cant can be measured most economically and accurately. I can do it.

As described above, the track level of the present invention can clearly display the voltage drop and usage limit of the power supply, eliminates the drawbacks of the analog meter type such as increased cost and vulnerability to vibration, and has a voltage drop indicator light. Not only can it eliminate ambiguity in the display when the power supply is powered by a battery, but if a battery is used in the power supply, it is the most economical way to replace the battery. This has great effects, such as preventing accidents such as this, and making it easy to adjust the zero point in the cant section.

[Brief explanation of drawings]

Fig. 1 shows a conventional analog meter type battery voltage monitoring device, Fig. 2 shows a conventional digital display type battery voltage monitoring device, Fig. 3 shows a conventional battery voltage drop display device, and Fig. 4 shows an embodiment of the present invention. 5 is a block diagram of the electrical control system in FIG. 4, FIG. 6 is a plan view of the display box, and FIG. 7a is a cant diagram of the display during measurement when the power supply is normal. Figure 7b is a display diagram of the display during non-measurement when the power supply is normal, and Figure 7c is a diagram of the display when the battery discharge voltage is lower than the voltage drop display voltage and is higher than the operating limit voltage. FIG. 7d is a display diagram of the display when the battery discharge voltage is below the operating limit voltage, and FIG. 8 is a diagram of the operating curve. 9... Track level, 10... Level detection bar, 11
...Display box, 14, 15...Contact part, 16...Gripping part, 17...Inspection bar, 18...Level detector, 20...
Zero point adjuster, 21...Low pass filter, 22...Differential amplifier, 23...AD converter, 24...Decoder, 25...Liquid crystal display, 26...Power supply device, 27...
Power switch, 29... Connection cable, 41... Constant voltage device, 42... Measurement switch, 43... Voltage detector.

Claims (1)

[Claims] 1. An inspection bar that has a contact part that contacts the upper surface of the head of the left and right rails of the track, and a grip part that connects both contact parts, and a test bar that is attached to the contact part of this test bar, and that is attached to the contact part of the test bar and A level detection bar consisting of a level detector that detects positive and negative cant as an electrical analog quantity; and a zero point adjuster that adjusts the zero point of the track level; a low-pass filter that removes high frequency components caused by disturbance; an output of the zero point adjuster;
A differential amplifier that inputs the output of the low-pass filter, amplifies and outputs the difference, an AD converter that converts the analog amount of this differential amplifier into a digital amount and outputs it, and inputs the output of this AD converter. a decoder that converts this into an input signal for a display and outputs it, a liquid crystal display that inputs the output signal of this decoder and digitally displays the level and cant of the orbit, a power supply device, and a power switch. , a constant voltage device that stabilizes the voltage of the power supply device and supplies a constant voltage to the level detector and the zero point regulator, detects the voltage of the power supply device, and the power supply voltage decreases to a voltage below a certain value; a voltage detector that displays a voltage drop display symbol on the liquid crystal display when the voltage drop is detected, and a voltage detector that displays the level and cant of the track when measuring the level and cant, and displays the output voltage of the constant voltage device when not measuring. A track level device comprising: a measurement switch for switching input of the AD converter; and a display box comprising a connection cable connected to the level measurement bar.