JPH08110227A - Displacement measuring apparatus with fine line as reference - Google Patents

Abstract

PURPOSE: To highly accurately and easily measure displacement of a machine or the like without an error in measurement due to an azimuth difference with a position of a fine line such as a piano line extended along an object to be measured as a reference. CONSTITUTION: A displacement measuring apparatus 1 placed movably along an object to be measured with a fine line extended comprises a scale 3 movable so that its tip is in contact with a surface of the object, a CCD sensor 2 for detecting a moving amount of the scale 3 and transmission laser type fiber sensors 41, 51 wherein a light emitting side and a light receiving side make a pair. Thus displacement can be measured highly accurately and easily with a position of the fine line as reference.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention uses a position of a fine wire such as a piano wire stretched along the side surface of an object to be measured as a reference, and a deviation of a device or the like can be measured accurately and easily. The present invention relates to a line-based deviation measuring device.

[0002]

2. Description of the Related Art The installation of cranes, carts, etc., must maintain a predetermined accuracy. For this reason, a reference line of fine wires such as a piano wire is temporarily installed along and near the object to be measured such as a crane or a trolley to be installed, and a scale is applied to multiple points between this and the object to be measured. Conventionally, a method of reading the scale of the scale and measuring the deviation of the object to be measured by the scale is conventionally used.

[0003]

However, since the measurement of the distance between the reference line and the object to be measured is a visual method in which the operator reads the scale graduations one by one, the minimum reading accuracy is limited, and the accuracy is at most 0. It is as large as about 5 mm, and a measurement error due to parallax by an operator also occurs, making it difficult to perform measurement with high accuracy.

According to the present invention, the position of a fine wire such as a piano wire stretched along the object to be measured is used as a reference, and the deviation of the device or the like can be measured accurately and easily without any measurement error due to parallax. The purpose is to

[0005]

SUMMARY OF THE INVENTION The present invention has been made to achieve the above object, and is provided with a displacement measuring device which is arranged so as to be movable along an object to which a fine wire is stretched. A scale that can be moved so that the tip is placed on the measured object surface,
A CCD line sensor that detects the amount of movement of the scale and a transmission laser fiber sensor that has a pair of a light emitting side and a light receiving side are used. The point is to measure easily.

[0006]

[Operation] A fine wire such as a piano wire is stretched in advance in the vicinity of the object to be measured such as a crane or a trolley, or along the surface to be measured. A pair of transmissive laser type fiber sensors that face the fine line stretched along the surface of the object to be measured from above and below the position measuring device, and appear and appear so as to abut on the surface of the object to be measured and measure the distance between them. It is equipped with a scale that is freely supported and a CCD line sensor that detects the amount of movement of the scale, and the pulse output of the CCD line sensor is counted to obtain the amount of movement of the scale. It is possible to detect a fine line with a minimum diameter of 0.1 mm, and display the amount of movement of the scale on the counter when a fine line is detected by a combination of CCD line sensor and scale. Thus, the deviation from the reference line can be obtained with high accuracy in units of 0.1 mm without visually observing the scale.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The deviation measuring device based on fine lines of the present invention will be described below with reference to the embodiments shown in the drawings. In the figure, reference numeral 1 denotes a deviation measuring device arranged along the measurement surface of the object to be measured. This deviation measuring device 1 appears and disappears in a main body 10 provided with a column 11, as shown in detail in FIGS. The scale 3 is freely supported, and a level 30 is provided on the scale 3 so that the scale 3 appears and disappears in a horizontal direction in order to enable more accurate measurement.

Further, the column 11 projecting upward from the main body 10 supports the upper and lower two sensor mounting bases 4 and 5 which can be adjusted in height and can be fixed at an arbitrary position, and one of these sensor mountings can be mounted. A transmission laser fiber sensor 41 on the light emitting side is attached to the base 4, and a transmission laser fiber sensor 51 on the light receiving side is attached to the other sensor mounting base 5, respectively. The light emitting side and the light receiving side transmissive laser fiber sensors can be mounted upside down, but the laser light of the light emitting side fiber sensor 41 can be surely received by the light receiving side fiber sensor 51. Both fiber fancers 41 and 51 are faced to each other. The light emitting side 41 and the light receiving side 51 of the transmissive laser fiber sensor may be provided at a constant vertical interval.

The CCD line sensor 2 is attached to the main body 10, and the CCD line sensor 2 detects the amount of movement of the scale 3 that appears and disappears. The pulse output is counted to detect the scale movement amount. The display unit 6 connected to can display. This CCD
The line sensor 2 and the display 6 are connected by a cable.

Next, a description will be given of the case where the deviation measuring apparatus 1 of the present invention is used to measure the horizontal inclination (parallelism) of the wheels of a crane, a dolly, or the like. As shown in FIG. 3 and FIG. 4, a fine wire P such as a piano wire is provided at an appropriate distance S near the side surface of the wheel.
Is installed temporarily, the deviation measuring device 1 is arranged along the measurement surface of the wheel W, one end of the scale 3 is brought into contact with the side surface of the wheel, and the scale is held horizontally by a level. When the main body 10 is moved in the wheel direction, the reading value of the scale when the laser fiber sensors 41 and 51 detect the fine line P is displayed on the display 6. This is performed for both horizontal ends of the wheel as shown in FIG. 4, and the inclination (parallelism) of the wheel W with respect to the reference line P in the horizontal direction can be obtained by the respective deviations S1 and S2.

[0011]

The deviation measuring device based on the fine wire of the present invention has the deviation measuring device arranged on the surface of the object to be measured, which is arranged so as to be movable along the object to which the minute wire is stretched. Since it is composed of a scale that is movable so that its tip is provided, a CCD line sensor that detects the amount of movement of this scale, and a transmission laser fiber sensor that has a pair of light emitting side and light receiving side, There is an advantage that the deviation of the object to be measured with reference to the position of a fine wire such as a piano wire can be measured with high accuracy and easily without being affected by a visual error.

[Brief description of drawings]

FIG. 1 is a front view showing an embodiment of a deviation measuring device based on a fine wire of the present invention.

FIG. 2 is a side view of the same.

FIG. 3 is an explanatory diagram of a measuring method according to the present invention.

FIG. 4 is a plan view of the same.

FIG. 5 is an explanatory diagram of a conventional measuring method.

[Explanation of symbols]

 1 Deviation measuring device 10 Main body 11 Support 2 CCD line sensor 3 Scale 30 Level 4 Sensor mount 41 Transmissive laser fiber sensor on light emitting side 5 Sensor mount 51 Transmissive laser fiber sensor on light receiving 6 Indicator

Claims (1)

[Claims] 1. A scale in which a displacement measuring device, which is arranged so as to be movable along a measured object on which a fine wire is stretched, is movable so as to abut the tip on the surface of the measured object, and this scale. The CCD line sensor that detects the amount of movement of the sensor and the transmission laser fiber sensor that has a pair of light-emitting side and light-receiving side are used as a reference, and the deviation of the fine line can be accurately and easily based on the position of the fine line. A deviation measuring device based on a fine line characterized by measuring.