JPH0432325B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a track level with a power saving device.

A track level using a liquid crystal display does not have a light emitting function, so it requires a lighting device when used in a dark place. Conventionally, as shown in FIGS. 1 and 2, a transparent display box 6 has a liquid crystal display 5 attached to a printed circuit board 4 provided in a box consisting of a cover 2 having a window panel 1 and a case 3. A commonly used method is to attach a tungsten light bulb 7 for illumination to the side of the liquid crystal display 5, and press a light switch 8 to illuminate the inside of the liquid crystal display 5 from the side of the liquid crystal display 5.

However, in this case, if a large liquid crystal display is used to make the display easier to read, the tungsten light bulb for lighting needs to be of a size commensurate with the display. Since the light must be turned on each time the track level and cant are measured through the light switch, power consumption is large, the life of the power battery is significantly shortened, and the battery must be replaced more frequently. Further, when a switch for the illumination light is provided, the switch for the illumination light must be operated each time, resulting in a disadvantage that the efficiency of level measurement work is reduced.

The present invention was made in order to eliminate the above-mentioned drawbacks.The present invention detects the surrounding brightness with a photo sensor, converts the change in light amount into changes in resistance value, voltage change, current change, etc., and controls illumination lights. This is used as an input signal to the device, and depending on the surrounding brightness, for example, if level measurement is to be performed in a dark place where the display on the LCD display cannot be read, turn on the illumination light so that the display on the LCD display can be read. When leveling is to be carried out in a location where the level is to be measured, a power-saving device is installed to turn off the lighting lights, eliminating the need for a lighting switch, and installing a track level with a power-saving device that reduces power consumption by lighting lights. This is what we provide.

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

FIG. 3 is a front view of one embodiment of the present invention.

Figure 4 is a block diagram of the electrical control system in Figure 3.
FIG. 5 is a plan view of a display box for a track level with a power-saving device that uses a tungsten light bulb as the illumination light.

FIG. 6 is a circuit diagram of a lighting control device using a tungsten light bulb as the lighting.

FIG. 7 is a circuit diagram of a lighting control device using light emitting diodes as lighting lights.

FIG. 8 is a plan view of a display box for a track level with a power saving device using light emitting diodes as illumination lights.

The same numbers in FIGS. 3 to 8 indicate the same members.

A track level 9 with a power saving device (hereinafter referred to as a track level 9) according to an embodiment of the present invention shown in FIGS. 3 to 5.
) is the level detection bar 10 and the 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. The level detector uses a commercially available tilt angle detector that detects the displacement of a pendulum immersed in damper oil from its vertical position with respect to the horizontal plane by converting it into voltage using a magnetoresistive element or differential transformer. Good too.

The display box 11 inputs the outputs of the zero point adjuster 20 that adjusts the zero point of the track level 9 and the level detector 18 of the level detection bar 10, and outputs it after removing high frequency components caused by disturbances such as vibrations. Filter 21
A differential amplifier 22 inputs the output of the zero point adjuster 20 and the output of the low-pass filter 21, amplifies and outputs the difference, and converts the analog quantity of the output of the differential amplifier 22 into a digital quantity. output
AD converter 23 and this AD converter 23
a decoder 24 which inputs the output of the decoder 24, converts it into an input signal of the liquid crystal display 25, and outputs it; a liquid crystal display 25 which inputs the output signal of this decoder 24 and displays it digitally; Vessel 2
5; a photo sensor 41 installed near the liquid crystal display 25 with the light-receiving surface facing upward; and a power saving device comprising an illumination light control device 42 operated by the photo sensor 41; It consists of a power supply 26, a measuring switch 27, and a connecting cable 29 with a plug 28 attached to one end for connection to the receptacle 19 of the level detection bar 10. The power supply device 26 may convert a battery or an external AC power source to DC using a rectifier (not shown). Further, if necessary, it may be connected to a constant voltage device or the like.

Next, the operation of the track leveling device 9 with power saving device 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 measurement switch 27 is closed, the voltage is applied from the power supply 26 to the zero point adjustment device 20, low-pass filter 21, differential amplifier 22, AD converter 23, decoder 24, illumination lamp 30, and illumination lamp control device 42. are applied respectively. Then, if necessary, the zero point of the track level gauge 9 is adjusted by the zero point adjuster 20. Next, the level detection bar 10
When the grip part 16 of the contact parts 14, 15 is placed so that the bottom plates 12, 13 of the contact parts 14, 15 are in contact with the upper surfaces of the heads of the left and right rails of the track, the level detector 18 detects the level and cant of the track electrically. The output is converted into a digital analog quantity, for example, a voltage, and the output is input to the low-pass filter 21. The low pass filter 21 is
From the input from the level detector 18, the level detection bar 1
High frequency components caused by disturbances such as vibrations caused when the 0 is placed in contact with the upper surface of the rail head or vibrations caused when a train passes an adjacent track are removed and output to the differential amplifier 22. The differential amplifier 22 inputs the output of the low-pass filter 21 and the output of the zero point adjuster 20, amplifies the difference, and outputs the amplified difference to the AD converter 23. 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 must use the track level 9
Grip the grip part 16 of the inspection bar 17 and bring the bottom plates 12, 13 of the contact parts 14, 15 into contact with the upper surfaces of the heads of the left and right rails of the track, and display on the liquid crystal display 25 of the display box 11. By simply reading the numerical values, the level and positive/negative cant of the trajectory at that position can be measured.

In addition, 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 liquid crystal display 2
5 (e.g. 8 mm), then at the same position, reverse the contact of the bottom plates 12 and 13 (relative to the left and right rails) and then display the value (e.g. -2 mm) on the liquid crystal display 25. From [8-(-
2) Calculate /2=5, and at the same position again, bring the bottom plates 12 and 13 into contact with the top surface of the rail head in the same way as above, and the + and - values displayed on the LCD display 25 will each be 5 mm. The zero point in the cant section can be easily adjusted by using the zero point adjuster.

On the other hand, the photo sensor 41 detects the brightness of the surroundings and converts the change in light amount into a change in resistance value, voltage change, or current change, etc., which is used as a light amount input signal to the illumination lamp control device 42, and the surrounding brightness is displayed on the liquid crystal display. Vessel 25
By turning on the illuminating lamp 30 when the brightness makes it difficult to read the display, and not turning on the illuminating lamp 30 when the surroundings are bright and the brightness is such that the display can be read, the illuminating lamp 30 can be used as needed. Since the illumination lamp 30 is only turned on at certain times, the power consumption by the illumination lamp 30 can be reduced.

FIG. 6 is a power saving control circuit diagram when a tungsten light bulb 30a is used in the illumination lamp 30 of FIG. 4.

In this example, when a CDS is used as the photo sensor 41, when the measurement switch 27 is turned on, the voltage changes to the tungsten bulb 3.
0a and the current limiting resistor 42 of the illumination light control device 42
applied to a. When the surroundings are dark, the resistance value of the photo sensor 41 becomes high, and a part of the current passing through the measurement switch 27 passes through the current limiting resistor 42a.
The current flows from the base of the transistor 42b to the emitter, and conduction is established between the collector and emitter of the transistor 42b, and the tungsten light bulb 30a lights up.

Also, if the surroundings are bright, the photo sensor 41
Since the resistance value of the transistor 42b becomes low and the current passing through the current limiting resistor 42a flows directly to the ground through the photo sensor 41, the base of the transistor 42b,
No current flows between the emitters of the transistor 42.
b is turned off, and the tungsten bulb 30a does not light up.

FIG. 7 shows the illumination light control device 42 when the light emitting diode 30b is used in the tungsten light bulb 30a of FIG. 6, and FIG. 8 shows the indicator box 50 when the light emitting diode is used as the illumination light. be. 7th
The figure shows the tungsten light bulb 30 in Figure 6 as a lighting light.
The fourth light emitting diode 30b is used as the light emitting diode 30b.
Although the action is the same as in Figures 5 and 6,
By using the light emitting diode 30b as the illumination lamp, the power consumption of the illumination lamp itself can be reduced.

As described above, the track level with power saving device of the present invention reduces the power consumption of illumination lights, which was a drawback of conventional track level using a liquid crystal display, and extends the battery life. It has great effects, such as reducing the frequency of replacement of the equipment and improving the efficiency of level measurement work.

[Brief explanation of drawings]

Fig. 1 is a plan view of a conventional display box, Fig. 2 is a sectional view of the main part of Fig. 1 viewed from the arrow direction, Fig. 3 is a front view of an embodiment of the present invention, and Fig. 4 is Figure 3 is a block diagram of the electrical control system, Figure 5 is a plan view of an indicator box using a tungsten light bulb for the illumination light, Figure 6 is a light control system when a tungsten light bulb is used for the illumination light, FIG. 7 is a lighting control device using light emitting diodes as illuminating lights, and FIG. 8 is a plan view of a display box using light emitting diodes as illuminating lights. 9... Track level with power saving device, 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, 27... Measurement switch, 29... Connection cable, 30... Lighting lamp, 30a... Tungsten light bulb, 30b... Light emitting diode, 41... Photo sensor, 42...
Illumination light control device, 43... Current limiting resistor, 44...
...transistor.

Claims (1)

[Scope of Claims] 1. An inspection bar having a contact portion that contacts the upper surface of the head of the left and right rails of the track, and a gripping portion that connects both of the contact portions, and a test bar that is attached to the inspection bar and that and a level detector that detects the level and positive/negative cant as electrical analog quantities; a zero point adjuster that adjusts the zero point of the track level; a low-pass filter that removes high-frequency components caused by disturbances such as, and a differential that inputs the output of the zero point adjuster and the output of the level detector via the low-pass filter, and amplifies and outputs the difference between the inputs. An amplifier, an AD converter that converts the analog value of the output of this differential amplifier into a digital value and outputs it, and a decoder that inputs the output of this AD converter, converts it into an input signal for the display, and outputs it. The output signal of this decoder is input to control the liquid crystal display that digitally displays the level and cant of the orbit, the power supply device, the power switch, the illumination light of the liquid crystal display, and the turning on and off of this illumination light. 1. A track level with a power saving device comprising: a power saving device comprising a lighting control device and a photo sensor; and a display box comprising a connection cable connected to the level detection bar. 2. A track level with a power saving device according to claim 1, wherein a tungsten light bulb is used as the illumination light of the liquid crystal display. 3. A track level with a power saving device according to claim 1, wherein a light emitting diode is used as the illumination light of the liquid crystal display.