JPS59126911A - Water level measuring device - Google Patents

Abstract

PURPOSE:To make an electric cord, which connects a level and a display box, unnecessary to measure a water level in a narrow space, by sending the output of the level in a measuring bar to the display box which is placed by a measuring device. CONSTITUTION:When a measuring bar 10 is placed on a track and a switch 26 is turned on, the output voltage of a level 18 is modulated, and radio waves are outputted from a connecting bar 14. The measurer turns on a switch 48 of a display box 30 in an optional position near the measuring bar 10 to turn on power. Then, radio waves received by a suspending belt 32 are demodulated, and the water level value is converted digitally and is displayed by a display circuit 50.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention is used for level measurement of tracks, etc., and the inspection par placed at the level measurement location and the display box showing the level value are separated, and the level value is read from the inspection par. This invention relates to a level measuring device that sends the indicated moon to a display box by radio waves.

Bubble-type levels are often used to measure the level of conventional railway tracks. This method measures the level from the position of the blister, but due to its structure, it cannot be separated from the measuring device, and there is a problem in that it requires an awkward posture such as bending over during measurement. There was also the problem that level measurements could not be made because it was difficult to put one's body under the vehicle.

The present invention has been made in view of the above circumstances, and it is an object of the present invention to provide a level measuring device that allows the user to easily read the scale in a posture and also makes it possible to measure the level in places where it is difficult for the body to enter.

In the level measuring device that digitally displays a level value on a display of a display box based on the output of the level, the measuring device is provided with a transmitter that modulates and outputs the output of the level into radio waves; The display box is provided with a receiver that demodulates the radio waves and a display circuit that digitally displays a level value based on the output of the receiver, and is configured to send the output of the level to the display box by wireless communication. did. The present invention will be described in detail below based on the illustrated embodiments.

FIG. 1 is an overall view of an embodiment of the present invention, FIG. 2 is an electric circuit diagram of a test bar, and FIG. 3 is an electric circuit diagram of a display box. In FIG. 1, the reference numeral 10 is an inspection bar, and a pair of pedestals 12 on the left and right
(12a, 12b), and a metal connecting bar 14 that rigidly connects them. The cradle 12a, 12b is placed on a pair of railway tracks 16 (16a, 16b). The cradle 12b includes a level 18, an amplifier 20, and a transmitter 22.
, a battery 24, and a switch 26 are attached, and these are wired as shown in FIG.

That is, first, the output voltage of the level gauge 18 is amplified to a predetermined voltage level by the amplifier 20. The transmitter 22 includes an amplifier 2
0 output voltage by amplitude modulation (AM), frequency modulation (FM)
), phase modulation (PM), or other suitable modulation method, and the modulated wave is sent out into space using the coupling par 14 as an antenna.

In FIG. 1, 30 is a display box. 32 is a hanging belt woven with conductive wire that also serves as a receiving antenna.

In the display box 30, as shown in FIG.
The receiver 34 demodulates the radio wave received at step 2 and returns it to an analog voltage corresponding to the output of the level gauge 18.

The differential amplifier 36 amplifies the voltage difference between the output voltage of the receiver 34 and the zero adjustment variable resistor 38 by a predetermined amplification factor, and outputs a voltage indicating a level value (unit amount) corresponding to the track distance. A converter 40 converts the output voltage of the differential amplifier 36 into a binary digital signal, and a decoder 42 converts this digital signal into a decimal number. And this decoder 4
The output of No. 2 is digitally displayed on a display 44, such as a light emitting diode (LED), in which a plurality of 7-segment numbers are arranged. In FIG. 3, 46 is a battery and 48 is a switch. Also, a VD converter 40, a decoder 42,
A display circuit 50 for digitally displaying the level value is formed on the display 44.

When using this device, first place the inspection bar 10 on the orbit and turn on the switch 26. Then, the power is turned on, the output voltage of the level gauge 18 is modulated, and a radio wave is output from the connecting bar 14. When the measurer turns on the switch 48 of the display box 30 at any position near the test bar 10, the power is turned on, the radio waves received by the hanging belt 32 are demodulated, and the level value is converted into digital by the display circuit 50. Is displayed·
In addition, when performing zero adjustment, the test bar 10 may be placed on a horizontal reference track, etc., and the variable resistor 38 may be adjusted so that the display on the display 44 becomes zero.

FIG. 4.5 is a front view and a side view of the inspection bar 1OA in the third embodiment. In this embodiment, wheels 60 (
60a, 60b), and a puller 62 which also serves as an antenna is fixed to the connecting par 14A. 6
Reference numeral 4 denotes a box that accommodates the circuit components shown in FIG. 2, such as a level 18.

According to this embodiment, the user can move easily on the track while standing while holding the pull handle 62, making the work even easier. Moreover, if this puller 62 is connected to a vehicle for straightening, it is possible to check the finished level every time the track is straightened.

Although each of the above embodiments measures the level of a track, it goes without saying that the present invention can also be applied to general level measuring instruments. In addition, the antenna is connected to the hanging belt 32 in each of the above embodiments.
Although the antenna is used also as the connecting bar 14 and the pull handle 62, it is clear that the antenna may be provided independently in the present invention.

As described above, the present invention uses wireless communication to send the output of the level in the measuring par to the display box in the hands of the measurer, eliminating the need for an electrical cord connecting the two, and allowing the measurement position to be adjusted. It is possible to easily take level measurements in a posture even in places that are too small for people to enter. Also, since there is no cord, it is easier to carry and store. In particular, when measuring the level of railway tracks, it is not only possible to easily measure the level under a track straightening vehicle such as a so-called multiple type vehicle, but also to easily measure the level of a railway track.
If an inspection vehicle equipped with wheels is connected to this vehicle as shown in Figure 5, it is possible to measure the level of the finishing of the straightening at or near the driving guide of the vehicle while performing track straightening. It is also possible to improve work efficiency.

[Brief explanation of drawings]

Figure 1 is an overall view of one embodiment of the present invention, Figures 2 and 3 are electric circuit diagrams of the inspection bar and display box, and Figures 4 and 5 are front and side views of the inspection bar in another embodiment. It is a diagram. 10, IOA...Inspection bar, 18...Level, 22
...Transmitter, 30...Display box, 34...Receiver,
44...Display device, 50...Display circuit. Patent Applicant Shibaura Seisakusho Co., Ltd. Agent Patent Attorney Yama 1) Yu Fumi Figure 1, Picture 2, Picture 3

Claims (1)

[Claims] A measuring par with a level attached thereto, and a display box formed separately from the measuring par, and digitally displaying the level value on the display of the display box based on the output of the level. The measuring device is provided with a transmitter that modulates the output of the level into radio waves and outputs the same, and the display box is equipped with a receiver that demodulates the radio waves, and a level value is displayed based on the output of this receiver. A level measuring device characterized by being equipped with a display circuit that digitally displays the level.