JPS6035007B2 - Angle measuring instrument - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an angle measuring instrument that can measure the angle of an inclined surface of an object to be measured by direct angle display.

Conventionally, when measuring the slope angle of the object to be measured, 'generally, when the sine bar is placed on the inclined surface of the object to be measured, the distance between the plug centers at both ends of the sine bar and the gauge block are used. The slope angle is determined from calculations and trigonometric tables based on the vertical distance between the plugs to be measured, but in this case, the support of the sine bar against the front slope of the object to be measured is considerably limited by the shape of the object to be measured. Not only that, but it also requires a considerable amount of time and effort to measure the vertical distance between the plugs using a gauge block, and also has the disadvantage that separate calculations must be made based on the measured values.

The purpose of the present invention is to detect the height difference between two points above and below on a slope of an object to be measured using the number of pulses, and to calculate the difference between the detected pulse number and two predetermined points on the slope on the hypotenuse of a right triangle. It is an object of the present invention to eliminate the above-mentioned drawbacks of the conventional art by providing an angle measuring instrument that calculates and displays the slope angle from the base length when the angle is calculated and displayed.

Next, the configuration of an embodiment of the present invention will be explained with reference to the drawings.

Dial gauges 3 and 4 are located at preset intervals L on the bottom surface of the main body 2 of the angle measuring instrument 1, and in this case, there are dial gauges 3 and 4, in this case, an actual device that detects the amount and direction of movement of the spindles 5 and 6 by the number and direction of movement of the moiré fringes. The dial gauges 3 and 4 described in the specification of Buta 54-4367 are mounted with their spindles 5 and 6 axes spaced parallel to each other, and in this mounted state, the gauges 7 and 8 of both spindles 5 and 6 The tip position is determined by a line connecting the tips of both side stators 7 and 8, which have been lowered to the lowest position by the urging force of springs 9 and 10, and each spindle 5.
, 6 Fine adjustment screws 11 and 12 of the dial gauges 3 and 4 protruding from the top surface of the main body 2 so that the angles formed with the axes are at right angles.
is set by.

Further, the outputs of pulses P1 and P2, which are out of phase by 900 degrees, from the photo-interrupter type sensors 3 and 14 for removing moiré cotton from the respective dial gauges 3 and 4 are sent up and down via amplifiers 15 and 16 and direction determining circuits 17 and 18. down counter 19,
20' is input and each output corresponding to the movement amount of the spindles 5 and 6 from the counters 19 and 20 are both sent to the subtraction circuit 21.
At the same time, the subtraction circuit 21 generates an output corresponding to the difference M between the moving amounts of both spindles 5 and 6, and an L setting device 22 that generates an output corresponding to the same output and the distance L between the spindle axes. The output from the angle arithmetic circuit 23 is to convert the radian obtained by expanding the series into a series by playing the role of a bandit, or by converting the radian into an angle by using the programmed ROM of MOS-IC. The tan angle converter is input to the angle calculation circuit 23 which outputs the BCD code corresponding to the angle value, and the output from the angle calculation circuit 23 is sent to the main body via the BCD-7 segment decoder/driver circuit 24 with latch operation. The information is input to the 7-segment LED angle display 25 on the 2nd surface, and the display 25 shows the vertical distance M between the tips of the measuring tips 7 and 8 of both spindles 5 and 6 as a perpendicular line, and the distance between the centers of both spindles 5 and 6. The angle of a right triangle with L as the base is displayed.

On the other hand, the outputs of the up/down counters 19 and 20 are connected to the respective D-A converters 26 and 27 and the drive circuit 28,
29, that is, as shown in FIG. 3, the transistors Trl, . . .
..., LE on the left and right positions on the surface of the main body 2 via drive circuits 28 and 29 that sequentially and continuously control Trn on and off in response to the output voltage from the D-A converters 26 and 27.
The D height is input to the height indicators 30 and 31, and on the same indicators 30 and 31, a number of LEDs 32 corresponding to the amount of movement of each spindle 5 and 6 are lit in order from the bottom in a bar graph shape and turned off in order from the top. do.

Next, the operation of this embodiment will be explained.

First, the shank 3 protruding from the top surface of the main body 2 of the angle measuring instrument 1
3 to the vertical moving head 34 of the stand for angle measurement on a surface plate (not shown), turn on the power switch 35, and
In this attached state, lower the head 34, confirm that the tips of the probes 7 and 8 at the lower end position are both in contact with the plane detection gauge (not shown), and press the switch 36 for resetting the counters 19 and 20. Then, the output of the subtraction circuit 21 becomes zero and the angle displayed on the angle indicator 25 becomes zero, and in this reset state, each dial gauge 3,
When the spindles 5, 6 of 4 move up and down, each up/down counter 9, 201 uses the position at the time of reset as a reference position, and the amount of vertical displacement of the spindles 5, 6 from this reference position is the moire detected by the sensors 3, 14. The number of striped movements is counted, and the count value lights up the LED 32 via the D-A converters 26, 27 and drive circuits 28, 29, and the vertical displacement of the spindles 5, 6 is displayed on each height indicator 30, 31. In addition to displaying the amount as the number of lit LEDs 32 in a raised graph form from the bottom, a subtraction circuit 21 that receives the count values from the up/down counters 19 and 20 displays the difference between the count values of the up/down counters 9 and 20. Output.

Therefore, when the measuring points 7 and 8 of the angle measuring device 1 are brought into contact with the inclined surface 38 of the object to be measured 37 placed on the surface plate as shown in FIG. is slope 3
An output corresponding to the perpendicular length M of a right triangle whose hypotenuse length is the distance between the contact points of the measuring elements 7 and 8 on the 8th axis and the base length is the distance L between the axes of the spindles 5 and 6 is generated, and the angle calculation circuit 23 In this case, a mechanical angle 8 is calculated from the output M from the subtraction circuit 21 and the output L from the L setting device 22, and the same angle 0 is displayed on the angle display.

In this embodiment, two dial gauges 3 and 4 are provided for the main body 2, and the respective spindles 5 and 6 can be moved up and down. For example, in FIG. Only the spindle 5 on the left side of the diagram
is fixed, and the up/down counter 20 directly generates an output corresponding to the perpendicular line M of the right triangle whose base is L on the dial gauge 4 side. The displacement amount of the spindles 5 and 6 can be detected by a linear scale type in addition to a dial gauge type.
amount.

The long sensor can be of any other type, such as the moiré stripe type, slit type, or mag scale type.Also, the sensor part to which the dial gauges 3 and 4 are attached is separated from the display 25 part containing the electric circuit. can do. next,
The effects of the present invention will be explained.

In the present invention, two spindles are attached to the main body of the measuring instrument in parallel with a constant spacing between their centers, and at least one of the two spindles is movable up and down, so that the number of pulses corresponding to the amount of movement of the spindle that can move up and down is generated. A sensor is provided that generates , and the position where the line connecting the tips of both spindles is perpendicular to the angle between the axes of each spindle is set as a reference value, and the reference value is calculated when the tips of both spindles come into contact with the object to be measured. An angle calculated from the number of pulses corresponding to the difference in the amount of movement of both spindles and the distance between the axes of both spindles is displayed on a numerical display angle measuring device provided at a position between both spindles on the surface of the measuring device main body. Arithmetic/display circuits, such as sensors 13, 14, amplifiers 15, 16, direction discrimination circuits 17, 18, up/down counters 19, 20, subtraction circuit 21, L setting device 22, angle computing circuit 23, decoder/driver A calculation display circuit consisting of a circuit 24 and an angle indicator 25 respectively, and a lighting amount corresponding to the amount of movement of both spindles with respect to the reference value at the left and right positions of the angle measuring device are determined from the bottom with respect to the lowest lighting position. The angle measuring device is equipped with a height indicator in the form of a graph that can be changed at the top.

As a result, the present invention has the effect that the angle of the required measurement point can be easily measured by simply placing two spindle tips at the required measurement point of the object to be measured. By lighting up in a graph from bottom to top based on the lowest lighting position, it is possible to accurately determine the direction and degree of inclination of the object to be measured, even if the inclination angle is small. Moreover, as the inclination increases, the difference in the amount of lighting displayed on the left and right height indicators in the form of a bar graph also increases, and this difference in the amount of lighting displayed matches the amount of adjustment, for example, by turning the handle. Therefore, the work of leveling the object to be measured can be easily performed while watching the amount of lighting displayed on the height indicator.

[Brief explanation of drawings]

FIG. 1 is a front view of one embodiment of the present invention, and FIGS. 2 and 3 are electrical circuit diagrams thereof. 1...Angle measuring instrument, 2...Main body, 3,
4...Dial gauge, 5,6...Spindle, 7,8...Measure head, 13,14...Sensor, 15,16...Amplifier, 17 , 18... direction discrimination circuit, 19, 20... up/down counter, 21... subtraction circuit, 22... L setting device, 23... angle calculation circuit, 24...Decoder/driver circuit, 25...Angle indicator, 26
, 27...D-A converter, 28, 29...Drive circuit, 30, 31...Height indicator, 32...
...LED. Figure 1 Figure 3 Figure 2

Claims (1)

[Claims] 1 Attach two spindles to the measuring instrument body in parallel with a constant spacing between their axes, and make at least one of both spindles movable up and down to generate a number of pulses corresponding to the amount of movement of the spindle that can move up and down. A sensor is installed, and the position where the angle between the line connecting the tips of both spindles and the axis of each spindle is perpendicular is used as a reference value, and the position of both spindles relative to the reference value when the tips of both spindles come into contact with the object to be measured is determined. Calculation and display for displaying the angle calculated from the number of pulses corresponding to the difference in travel amount and the distance between the two spindle axes on a numerical display angle indicator provided at a position between the two spindles on the surface of the measuring instrument body. a bar graph-shaped height indicator in which the lighting amount corresponding to the amount of movement of both spindles with respect to the reference value can be changed from bottom to top with reference to the lowest lighting position at the left and right positions of the angle indicator; An angle measuring instrument characterized by providing each of the following.