JPS6334415B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an automatic positioning device for the unbalance angle of a specimen in a dynamic balance testing machine.

In order to rotate the specimen with a dynamic balance tester, detect the unbalance angle on both the left and right correction surfaces, and correct the specimen based on the detection results, or mark the correction, for example, First, the unbalanced angle position of the left side of the specimen is positioned and stopped at a fixed point, and then the right side of the specimen is positioned and stopped at a fixed point at the unbalanced angle position. This type of conventional automatic positioning device converts the detected unbalance angle on both sides into a pulse number, and rotates the specimen from the reference position to the position of the unbalance angle on one side using a pulse motor. This method had the disadvantage that positioning took time because the specimen was rotated to the reference position again, and then rotated to the unbalanced angle position on the other surface. Was. In addition, in an automatic positioning device for unbalance angle dedicated to a specimen, such as a motor rotor, where the angular position that can be corrected is limited to every 60°, the unbalance angle detection result is determined at least 2 times. Because corrections are made by decomposing the correction into angular components at two correctable positions, the number of stopping positions is limited to six in the above example per circumference of the specimen.In such cases, the specimen must be rotated. Since it is possible to easily perform positioning by detecting the correctable position with a sensor and counting the detected signals, there is no known device that, after positioning one surface, positions the other surface based on the positioning state. It is being However, if it is necessary to make corrections at arbitrary angles on the entire circumference of the specimen, such a known method cannot be adopted because the above-mentioned detection signal cannot be obtained.

The present invention has been made in view of the above, and is applicable to an apparatus in which it is necessary to make corrections at arbitrary angles on the entire circumference of a specimen, and therefore it is necessary to position and stop the specimen at arbitrary angles on both the left and right sides of the specimen.
The purpose is to shorten the positioning time mentioned above.

A configuration for achieving this object will be explained with reference to FIG. 1 corresponding to the embodiment. A preset up-down counter (counter circuit) 9 that counts (clock pulses) and an unbalance detection value of one surface (first surface) and the other surface (second surface) of both correction surfaces are calculated as pulse counts. a first and second pulse number conversion circuit 1 and 2 that convert the pulse number into Based on the comparison result of the comparison circuit 5, when the output of the second pulse number conversion circuit 2 is smaller than the output of the first pulse number conversion circuit 1, the output of the second pulse number conversion circuit 2 is 360. A preset value supply means (360°) that supplies a value obtained by adding the number of pulses corresponding to Pulse generation circuit 8, addition circuit 7)
and a second comparison circuit 6 which compares the count value of the preset up-down counter 9 and the output of the first pulse number conversion circuit 1 and gives a stop command to the pulse motor 10 when they match. The down counter 9 sets the drive pulse of the pulse motor 10 to 0 when positioning the first surface at an unbalanced angle.
It is characterized by being configured such that the drive pulses of the pulse motor 10 are counted up from a preset value when positioning the second surface at an unbalanced angle, and from the positioning stop state of the first surface. .

Embodiments of the present invention will be described below based on the drawings.

FIG. 1 is a block diagram showing the configuration of an embodiment of the present invention.

The unbalance angles θL and θR of the left and right surfaces of the specimen relative to the reference position detected by the dynamic balance tester are introduced into the first and second pulse number conversion circuits 1 and 2, respectively, to convert the corresponding number of pulses. and stored in the first and second storage circuits 3 and 4, respectively. The output of the first storage circuit 3 is supplied to the first and second comparison circuits 5 and 6, and the output of the second storage circuit 4 is added to the first comparison circuit 5 via the first switch S1. circuit 7
is supplied to The first comparator circuit 5 compares the input A from the first switch S1 and the input B from the first storage circuit 3, and outputs an L level (0V) when A≧B, and a high signal when A<B. The level is outputted and supplied to the 360° pulse generation circuit 8 via the second switch S2. The 360° pulse number generation circuit 8 is
Only when the input C from the second switch S2 is at H level, the number of pulses corresponding to 360° is outputted and supplied to the adder circuit 7. The adder circuit 7 adds the input A from the first switch S1 and the input D from the 360° pulse number generating circuit 8 and outputs the result to the counter circuit 9. A third switch S3 is connected to the counter circuit 9, and a clock pulse is input thereto, and the third switch S3 applies a voltage of +V or 0 (earth) to the counter circuit 9 depending on the setting situation. supply As shown below, the counter circuit 9 has a function as a so-called preset up-down counter, and uses the input E from the adder circuit 7 as a count start value, and every time a clock pulse is input, the input from the third switch S3 is input. When F is +V, it counts up, and when input F is 0, it counts down and outputs it to the second comparison circuit 6. On the other hand, the same clock pulses are also supplied to a pulse motor 10 for rotating the specimen, and the pulse motor 10 is rotated in a predetermined direction by the clock pulses. The second comparison circuit 6 compares the input B from the first storage circuit 3 and the input G from the counter circuit 9, and the input G is the input B.
When they match, a stop command is issued to stop the rotation of the pulse motor 10. The first switch S1 and the second switch S2 described above are set to the ground side (0) during the first positioning (left side), and the third switch S3 is set to the ground side (0) during the second positioning (right side). (0).

Next, we will discuss the effect. First, the position of the unbalance angle θL of the left surface is determined. At this time, the second switch S2 is set to the ground side, so
The input C of the 360° pulse generation circuit 8 is 0,
The number of pulses corresponding to 360° is not generated, and the first
Since the switch S1 is also set to the ground side, the inputs A and D of the adder circuit 7 are both 0. Therefore, since the input E from the adder circuit 7 of the counter circuit 9 is 0, the count start value is 0.
Since the third switch S3 is set to +V, the counter circuit 9 starts counting up from 0 every time a clock pulse is input, and supplies it to the second comparator circuit 6. The clock pulse also drives the pulse motor 10 in a predetermined direction to rotate the specimen. In the second comparison circuit 6, if the input B of the number of pulses corresponding to the unbalance angle θL of the left surface of the specimen from the first storage circuit 3 and the input G from the counter circuit 9 described above match, a stop command signal is issued. Pulse motor 1
Stop rotation of 0. Therefore, the specimen is rotated by θL from the reference position and then stopped, completing the positioning of the unbalanced angle of the left surface. The unbalance angle positioning of the right side is then carried out, with the first, second and third switches S1, S2 and S3 being set opposite to their initial setting. 1st
In the comparison circuit 5, the input A from the second storage circuit 4 and the input B from the first storage circuit 3 are compared, and when A>B, that is, θR>θL, the output of L level (0) is 360 It becomes the input C of the pulse number generation circuit 8 and does not output the number of pulses corresponding to 360 degrees, so the addition circuit 7 receives the input A from the second storage circuit 4
only is output to the counter circuit 9. In the counter circuit 9, since the input from the third switch S3 is 0, each time a clock pulse is input, the counter circuit 9 starts counting down using the number of pulses corresponding to the input E from the adder circuit 7, that is, θR, as a count start value. The clock pulse drives the pulse motor 10 from the unbalanced angle positioning stop position on the left side in the same direction as the previous time to rotate the specimen. The second comparison circuit 6 then stops when the input B of the number of pulses corresponding to the unbalance angle θL of the left surface of the specimen from the first storage circuit 3 matches the input G from the counter circuit 9. A command signal is issued to stop driving the pulse motor 10. Therefore, as shown in Fig. 2, the specimen is first rotated in a predetermined direction and positioned at the unbalance angle θL on the left side, then rotated in the same direction by θR - θL and positioned at the unbalance angle θR on the right side. It will be stopped at the position. 1st
Input A and input B are compared in comparator circuit 5, and if A<B, that is, θR<θL, the H level output becomes input C of 360° pulse number generation circuit 8, and therefore 360° A corresponding number of pulses is generated and becomes the input D of the adder circuit 7, which
The number of pulses corresponding to 360° and the input A from the second memory circuit 4 are added and the result is supplied to the counter circuit 9. The counter circuit 9 counts down the number of pulses corresponding to its input E, that is, 360°+θR, every time a clock pulse is input as a count start value, and supplies the value to the second comparison circuit 6. When the input G matches the input B from the first memory circuit 3, a stop command signal is issued to stop the pulse motor 10 from driving. Therefore, as shown in FIG. 3, the specimen is first rotated in a predetermined direction and positioned at the unbalance angle θL of the left surface.
It is rotated in the same direction by 360° + θR - θL and stopped at the position of the unbalance angle θR on the right side. in this way,
First, the unbalance angle position of one surface is rotated in a predetermined direction from the reference position and then stopped, and the next unbalance angle position of the other surface is rotated in the same direction from the previously stopped position. It is then positioned and stopped.

As explained above, according to the present invention, in a device that stops a specimen at a fixed position at an arbitrary angle in order to perform correction at an arbitrary angle on the entire circumference, The specimen can be rotated to position and stop the other surface, and when the specimen is rotated from the first stopping position to the next stopping position, the angle will not exceed 360°. For example, when θL is 200° and θR is 220°, comparing the rotation angle required to position θR after positioning θL of the specimen with the conventional example, it is found that θL
For the type that rotates in the opposite direction after positioning , returns to the reference position, and then positions θR,
It used to require 200° + 220° = 420°, but according to the present invention, only 220° - 200° = 20°. Also, θL is 220° and θR is
Even in the case of 200°, in the conventional example, 220° + 200° =
It used to require 420 degrees, but according to the present invention, only 200 degrees + 360 degrees - 220 degrees = 340 degrees. In this way, the positioning stop time for unbalanced angles can be shortened.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing the configuration of an embodiment of the present invention, and FIGS. 2 and 3 are diagrams illustrating the operation of the present invention. DESCRIPTION OF SYMBOLS 1...First pulse number conversion circuit, 2...Second pulse number conversion circuit, 3...First storage circuit, 4...
...Second storage circuit, 5...First comparison circuit, 6...
...second comparison circuit, 7...addition circuit, 8...360° pulse number generation circuit, 9...counter circuit, 10...
...Pulse motor.

Claims (1)

[Claims] 1. In a device that sequentially positions and stops the specimen at a fixed point at the unbalance angle position of the specimen, one side at a time, based on the unbalance angles of the left and right sides of the specimen detected by a dynamic balance tester, the specimen is moved from the reference position. A pulse motor that rotates in a constant direction, a preset up-down counter that counts the drive pulses of the pulse motor, and unbalance angle detection values for one (first surface) and the other (second surface) of the two surfaces. a first and second pulse number conversion circuit that converts each into a pulse number, a first comparison circuit that compares the magnitude of the output of the first and second pulse number conversion circuits, and the first comparison circuit. Based on the comparison results, when the output of the second pulse number conversion circuit is smaller than the output of the first pulse number conversion circuit, the number of pulses that corresponds to 360° to the output of the second pulse number conversion circuit. a preset value supplying means for supplying the sum of the numbers added together and, when larger, the output itself of the second pulse number conversion circuit, to the preset up/down counter as a preset value; A second circuit that compares the outputs of the first pulse number conversion circuit and issues a stop command to the pulse motor when they match.
The preset up-down counter counts up the driving pulse from 0 when positioning the first surface at an unbalanced angle, and counts up the driving pulse from 0 when positioning the second surface at an unbalanced angle. An unbalance angle positioning device for a dynamic balance tester, characterized in that the drive pulse is counted down from the preset value from a positioning stop state.