JPH0420808A - Level measuring apparatus - Google Patents

Abstract

PURPOSE:To enable level measurement over a wide range without moving a laser radiator by receiving a plurality of laser beams from different positions on a plurality of measuring points and calculating a level of each measuring point from the light receiving height while the light receiving height is compensated. CONSTITUTION:After height of a laser beam and an inclination of a light emitting unit 2 are adjusted with a driving vertical moving unit 3, laser beams are emitted while the light emitting unit 2 is horizontally rotated. On the other hand, a light receiving unit 3 inputs a height signal according to a receiving height of the input laser beam to a controller 10. Then in the vicinity of a border between two regions I, II to which both laser beams from radiators 1A, 1B are incident, a difference levels of two signals which are input from a light receiver 8 located in the vicinity in the border of the region I for example is calculated 10 to detect a difference in height of the light emitting unit 2 of both radiators 1A, 1B, and a level value of a height signal from the light receiving unit 8 in the region I is displayed as it is while a height signal of the light receiver 8 of the other region II is compensated according to the difference in height of the light emitter 2 and displayed 11. Thus measurement can be efficiently done in a short time while the radiators 1A, 1B are fixed.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to an improvement in a level measuring device that measures uneven settlement of a structure and monitors level fluctuations at a plurality of locations.

(Prior Art) When measuring the level of multiple parts, such as measuring uneven settlement of a building, measurement using a spirit level and a stun 7 has conventionally been widely used. In addition, in recent years, using an electronic level that emits a 1-maser likelihood line and a photodetector that receives a laser beam,
A device is also used that determines the level of a measurement point where a light receiver is placed from the light receiving height of the light receiver.

(Problem to be solved by the invention) However, in any case, a spirit level or electronic level installed at one point often cannot cover all measurement points due to obstacles, etc. In such cases, the spirit level or electronic level is The electronic level was moved to measure unmeasured measurement points along with at least one measurement point that had already been measured, and predetermined calculations were performed to determine the total measurement level. however,
Such a measurement method has the problem of being laborious and time-consuming.

The present invention has been made in view of the above-mentioned problems, and an object of the present invention is to provide a bell measuring device that can perform level surveying over a wide range without moving.

(Means for Achieving the Object) The present invention includes a plurality of laser irradiators arranged at different positions and irradiating laser beams in a horizontal direction while rotating, a plurality of sides provided around each laser irradiator, It is equipped with light receivers placed in each of the four light receivers and a means for determining the level at each measurement point from the light received by these light receivers, and a means for determining the level of each measuring point from the light received by these light receivers. The light receiver is provided with means for correcting the level at each measuring point determined by the level determining means based on the difference in the receiving height of the laser beam received by the light receiver.

(Function) By emitting laser beams from a plurality of laser irradiators provided at different positions, one light receiver on the gold side receives the laser beams without moving the laser irradiators.

In addition, the correction means calculates the difference in the height of the laser irradiator from the difference in the light receiving height of the light receiver that receives the laser beam of the plurality of laser irradiators, and calculates the level of each measurement point based on the calculation result. to correct. As a result, the levels of all survey points are unified to the same level starting from the same benchmark.

(Example) Embodiments of the present invention are shown in FIGS. 1 to 4.

In FIG. 1, 1A and 1B are laser irradiators placed at different positions, each of which is equipped with a light emitting section 2, a horizontal adjustment section 3, and an up/down movement section 4 shown in FIG. It is fixed to the foundation beam 6 of the building shown in the figure.

The light emitting section 2 has a laser beam emitting function similar to that of a conventional electronic level, and an automatic leveling function similar to a conventional auto level that maintains the optical axis horizontally against the slight slope of the horizontal 1!4 adjustment section 3. Equipped with. In addition, the light emitting unit 2 is equipped with 7 actuators for turning and a turning angle meter for detecting the turning angle, and the light emitting unit 2 is equipped with 7 actuators for turning and a turning angle meter for detecting the turning angle.
Turn 60° horizontally.

The horizontal adjustment section 3 includes actuators that adjust the inclination angles of the light emitting sections 2 from orthogonal horizontal reference axes, and an inclinometer or level meter that measures these inclination angles.

The vertical movement section 4 includes an actuator that raises and lowers the light emitting section 2 together with the horizontal adjustment section 3, and a position sensor that detects the vertical position of the light emitting section 2.

The laser irradiators IA and 1B are each connected to a controller 10 (described later) through a signal circuit, and the vertical position, rotation angle, and tilt angle of the light emitting unit 2 are sent to the controller 10 as signals.
Each of the seven actuators, which horizontally rotate the light emitting section 2, adjust the inclination angle, and raise and lower the light emitting section 2, is controlled by a signal sent from the controller 10. Further, the emission of the laser beam is also controlled by a signal sent from the controller A-210.

On the other hand, a light receiver 8 is attached to the base of each pillar 7 of the building. The receiver 3 is connected to the controller 1 by a signal circuit.
Connected to 0. The light receiver 8 includes a light receiving section in which a number of sensors that react to the laser beam are vertically arranged, and when the laser beam is received, it outputs a height signal corresponding to the position of the sensor that received the light to the controller 10 through the signal circuit.

Note that the light receivers 8A to 8D shown in FIG. 4 are laser irradiators I.
It is installed at a position where it can receive both laser beams A1 and 1B.

The controller 10 is composed of a microcomputer as a means for determining the level of the measurement point where the light receiver 8 is placed from the light receiving height of the light receiver 8 and a means for correcting this level. and an input device.

The controller 10 outputs signals to the laser irradiators IA and IB in accordance with the command input via the input device, raises and lowers each light emitting unit 2 to an arbitrary height, adjusts the inclination horizontally, and Rotate to a rotation angle and emit a laser beam.

Furthermore, when a height signal is input from the light receiver 8 that has received the laser beams of both the laser irradiators IA and IB, the light emission 112 of the laser irradiators IA and 1B is determined based on these input signals.
Based on this calculation result, other light receivers 8
The level at each measurement point where the light receiver 8 is installed is displayed on the display section 11 by correcting the height signal input from the sensor.

Next, the action will be explained.

When using this level measuring device, the operator first inputs a command to the input device to connect the laser irradiator 1A and
The vertical moving part 3 of B is driven to raise and lower the light emitting part 2, and the height of the emitted laser beam is set to all the light receivers 8 that can receive the emitted laser beam.
so that it falls within the light receiving range.

Next, the operator inputs a command to the input device to drive the horizontal adjustment section 3 so that the inclination angle signal input from the inclinometer provided in the horizontal adjustment section 3 to the controller 10 becomes zero, and drives the light emitting section 2. 1 itq horizontally.

Then, an actuator provided in the light emitting section 2 is driven by inputting a command to the input device, causing the light emitting section 2 to emit a laser beam while horizontally rotating the light emitting section 2. At this time, since the automatic leveling function of the light emitting unit 2 is activated, the leveling of the emitted laser beam is maintained with high precision.

On the other hand, each light receiving section 8 inputs a height signal corresponding to the light receiving height to the controller 10 when the laser beam is incident thereon. This height signal corresponds to the level of each measurement point where the light receiver 8 is arranged, but since the vertical position of the laser emitting section 2 is not necessarily the same between the laser irradiating sections 1A and IB, as shown in FIG. There is no correlation between the levels of stations in area (1) and stations in area (II).

However, the laser irradiators IA and 1B are located on the receivers 8A to 8D near the boundary between region (1) and region (It).
Both laser beams are incident. Therefore, the controller 10 calculates the difference between two types of levels inputted from the light receiver 8A, and calculates the difference between the two types of levels that are inputted from the light receiver 8A, and
Detect the difference in height.

Regarding the height signal inputted from the light receiver 8 in the area (I), the numerical value of the level corresponding to the signal is displayed on the display device 1.
1 is displayed as is, while the height signal input from the light receiver 8 in the area (■) is corrected according to the detected height difference of the light emitting unit 2, and the level value corresponding to the height signal is corrected. After that, display! 11. Therefore, the obtained levels are all based on the laser irradiator IA, regardless of region (1) or (I[).

In this way, the levels at all measurement points are measured, but since the laser irradiators IA and IB are fixed to the foundation beam 6 by the bracket 5 and do not need to be moved, the measurement work can be carried out in a short time and efficiently. be exposed.

Although two laser irradiators IA and IB are used in this embodiment, the number of laser irradiators can be increased depending on the width of the measurement range.

(Effects of the Invention) As described above, the present invention provides a light receiver that can receive laser beams irradiated from a plurality of laser irradiators, and a level at each detected measurement point that is determined by the receiving height of the laser beam of this light receiver. Since it is equipped with a means for correcting based on differences, the obtained level is based on the same benchmark across all measurement points, making level measurement more efficient even when there are many measurements over a wide measurement range. It can be done well and in a short time.

[Brief explanation of the drawing]

FIG. 1 is a schematic perspective view of a level measuring device showing an embodiment of the present invention, FIG. 2 is a side view of a laser irradiator, and FIG. 3 is a side view of a building base showing the arrangement of the level measuring device. Fourth
The figure is a plan view showing the positional relationship between a laser irradiator and a light receiver. IA, IB...Laser irradiator, 2...Light emitting part,
3... Horizontal adjustment section, 4... Vertical adjustment section, 8... Light receiving section, 10... Controller. Patent applicant: Kayabae Gyo Co., Ltd. (1 other person)

Claims (1)

[Claims] A plurality of laser irradiators arranged at different positions and irradiating laser beams in a horizontal direction while rotating; and receivers respectively arranged at a plurality of measurement points provided around each laser irradiator;
means for determining the level of each measurement point from the light receiving height of these light receivers, and a light receiver capable of receiving laser beams from a plurality of laser irradiators among these light receivers, and means for determining the level. 1. A level measuring device comprising means for correcting the level at each measurement point determined by the receiver based on the difference in the receiving height of a laser beam received by the light receiver.