JPH01187429A - Method and device for calibration of dynamic balance testing device - Google Patents

Abstract

PURPOSE:To adjust the sensitivity without using any tire for sensitivity adjustment by detecting the difference between signals from a vibration detector when a weight is mounted on one surface of a body to be tested and when not and separating it into an out-side and an in-side component signal by a surface. CONSTITUTION:A tire to be measured is fixed on a rotary shaft and a switch 31 is placed on the side of its contact (b) to rotate a motor; and then a signal corresponding to the unbalance quantity of the tire is outputted by a vibration detector 7 and stored in waveform storage circuits 50 and 52. Then the weight whose quantity is already known is mounted on the out side of the tire and rotated similarly; and then a signal indicating the unbalance is stored in the waveform storage circuits 51 and 53. Waveform signals are read out to a surface separating circuit 31 through difference circuits 54 and 55 and converted by rectifying and smoothing circuits 37 and 38 into DC signals, which are converted into signals indicating the quantity of the unbalance. Then a separation rate adjusting device 33 is so adjusted that a signal from a comparing circuit 61 becomes zero. Then sensitivity adjusting devices 34 and 35 are so adjusted that the signal from the comparing circuit 60 becomes zero. Consequently, the sensitivity, etc., of the detector 7 is corrected to accurately indicate the quantity of the unbalance.

Description

DETAILED DESCRIPTION OF THE INVENTION (Technical Field) The present invention relates to a technique for adjusting initial sensitivity in a dynamic balance test device.

(Prior Art) Normally, in order to adjust the sensitivity, a tire having a known amount of unbalance is mounted, and the sensitivity adjustment mechanism is adjusted so that the indication of the unbalance becomes the known amount.

For this reason, there is a problem in that it is necessary to attach and detach the tires for sensitivity adjustment, making the operation complicated.

(Purpose) The present invention was made in view of the above problems, and its purpose is to provide a dynamic balance test device that can adjust sensitivity without requiring tires for sensitivity adjustment. The purpose of this invention is to propose a sensitivity adjustment method.

Another object of the invention is an apparatus lFr for realizing the method described above.
It is about providing.

(Summary of the Invention) That is, the present invention is characterized in that the test object is rotatably supported by two vibration detection means at a fixed distance in the axial direction on an attachable rotating shaft, and the A test device main body equipped with an axis position detection means,
a surface separation circuit for separating the signal from the vibration detector into an outside component signal and an inside component signal, including a surface separation ratio adjustment means for adjusting the ratio of the signal from the vibration detection means; and an inside signal and an outside component signal. The actuator is equipped with a sensitivity adjusting means for adjusting the level of each signal, a means for rectifying and smoothing the signal from the surface separation circuit to indicate the amount of unbalance, and a means for indicating the unbalance position based on the signal from the position detecting means. A process of attaching and driving an arbitrary test object to a balance test device and storing signals from each vibration detection means, and a step of driving the test object with a known amount of weight attached to it to detect the vibration. a step of storing the signal from the means; a step of detecting the difference between the signals obtained in the two steps and separating the surfaces into an out side component signal and an inside component signal by the surface separation circuit; , comprising a step of adjusting the plane separation ratio and sensitivity so that the indicated value of the side without the weight is zero and the signal of the side with the weight is attached indicates a value corresponding to the weight of the weight. It is in.

(Example) Therefore, details of the Japanese disease will be described below based on illustrated examples.

FIG. 1 shows an embodiment of this dead sail, in which reference numeral 1 is a motor, and a rotating shaft 2 is provided with a mounting tool 3 at the tip thereof for fixing a tire wheel. This motor] is vertically fixed to the base 4 by support rods 5.5.5.5 at its four corners at a position where the rotary shaft 2 protrudes from the side surface of the base 4. Each support rod 5 has a narrow diameter portion 5a formed at its center, and is configured to bend at the center.

On the other hand, one end 6a, 6a7A of a rod 6.6 is fixed to both ends in the axial direction of the motor 1, and the other end 6b, 6b is implanted in the base 4 with a vibration detector 7.7 made of a piezoelectric element interposed therein. It is fixed to the wall surface 8. Note that reference numeral 10 in the figure is a code plate attached to the end of the motor rotation shaft, and together with photosensors 11 and 11 provided on the base 4, constitutes a rotational position detector.

FIG. 2 shows an embodiment of the signal processing section,
The reference numeral 2o in the figure is an up/down counter that receives signals from the photosensor 11.1 that constitutes the rotational position detector, and the signals from this are the counts of the up/down counter 20 at the start of the test or when the power is turned on. The content is input to the reference point storage circuit 21 that stores the content, and is also input to the rotational position signal generation circuit 22 where the difference with the initial count content is calculated and converted into a signal corresponding to the set reference position. After the position corresponding to the peak is detected in the peak position detection circuit 25.26 based on the signal from the comparator 23.24 which detects the zero crossing point of the signal from the circuit 30, the signal is outputted via the phase shifter 27.28. It is output to the outside position indicator 29 and the inside position indicator 30.

Reference numeral 31 designates the above-mentioned surface separation circuit, which adjusts the surface separation ratio by controlling two signals from the vibration detector 7.7 and two signals from a difference calculation circuit 54.55, which will be described later, using the changeover switch S1. Based on the data received via the ratio adjuster 33 and from the dimensional data input circuit 32 such as the axial length of the rotating body under test and the distance between the vibration detector 7.7 and the rotating body under test, The test rotating body is configured to be separated into an outside component signal and an inside component signal, and each component signal is passed through a sensitivity adjuster 34.35 and a noise removal filter 36.37 to a rectification and smoothing circuit 38. After being converted into a direct current by 39, it is output to an out-side unbalance amount indicator 40 and an in-side unbalance amount indicator 41. These sensitivity adjusters 3
4.35 is configured to be adjustable in conjunction with the operation amount so as to attenuate the signal at the same ratio.

50, 51, 52, and 53 are waveform storage circuits, respectively.
It is equipped with a capacity jl that can store the signal waveform from each vibration detector 7.7, and stores the rotational position @ as an address and the amplitude value as data. When reading, the signals of the paired waveform storage circuits 50, 51, and 52.53 are outputted to the surface separation circuit 31 via the difference circuit 54.55 and the changeover switch S1. It is configured.

Reference numeral 60 and 61 are comparison circuits, and the side where a known amount of weight is attached receives a signal from the reference value setting device 62 that sets the unbalance amount corresponding to this weight, and the other side receives a signal from the unbalance amount zero. The set signal from the setter 63 is input, and the difference from the unbalance amount signal is output to a control circuit 66, which will be described later.

Reference numeral 65 denotes a phase difference detection circuit, which includes a weight position storage circuit 64 that stores a position signal indicating the position where the weight is attached, and a peak position detection circuit on the side where the weight is attached, which in this embodiment outputs the output from the circuit 25. The difference is detected and outputted to the control circuit 66. Reference numeral 66 denotes the aforementioned control circuit, which is composed of a microcomputer and operates the separation ratio adjuster 33, sensitivity adjuster 34, 35, and phase shifter 27, 28 based on the procedure shown in the flowchart described later when setting the calibration mode. It is programmed as follows. Reference numerals 71 and 72 in the figure indicate constant setting circuits for correcting changes in the indicated values due to the diameter and rotational speed of the rotating body under test, respectively.

In this embodiment, if the motor is subjected to excessive vibration due to transportation or the like, the motor will swing relative to the base 4 while being supported by the four support rods 5.5.5.5. However, since it is suspended at four points, it will return to its original position when the acting force disappears, so the vibration detector 7.
No positional deviation occurs between the motor 1 and the motor 7.

Once installed at a predetermined location, switch S1 is set to the contact a side in the figure, and a rotating object to be tested, such as a tire, is attached to rotating shaft 2 using mounting tool 3, and motor 1 is driven to a predetermined rotational speed. When this point is reached, the power to motor 1 is cut off. As a result, the tire is free to rotate without receiving any external force, and generates a radial force due to its own unbalance. Of this radial force, the force acting in the horizontal direction acts via the motor 1 to deflect the support rod 5.5.5.5 from the center, and via the port 6.6. The vibration detector 7.7 will be pressed. The vibration detector 7.7 thereby outputs a signal due to the unbalance of the tire. The signals from each vibration detector 7.7 are input to the surface separation circuit 3 via the switch S1, and are separated into an out side component signal and an in side component signal. The signal from the rotational position signal generating circuit 22 which corresponds to the zero crossing point of the signal in the sine waveform stage output from the filter 36.37 is displayed as an unbalance amount by the display 40.41. output to display the unbalanced positions on the outside and inside sides.

By the way, if it is necessary to adjust the sensitivity at the end of assembly or readjust the sensitivity due to changes over time, first fix any rotating body to be tested, for example, the tire whose unbalance is to be measured, to the rotating shaft, and then turn switch 3. ] to the contact side in the figure.

Such quasi! When you turn on the power after completing step a,
The value of the up/down counter 20 is stored in the memory circuit 2 as a reference position. When the motor 1 is rotated at a predetermined rotation speed after the reference position has been stored, the vibration detector 7
．． 7 outputs signals corresponding to the amount of unbalance of all the tires installed, and these signals are stored in the first and third waveform storage circuits 50 and 52, respectively (Fig. 4, ■ and ■).

When the first signal has been captured, the motor is stopped, a known amount of weight is attached to one side of the tire, for example at the reference point on the outside, for example at the lowest point of the rim, and the rotation at this time is The signal from the position signal generation circuit 22 is transferred to the weight position storage circuit 64.
Store in.

When the motor 1 is rotated again after such preparations are completed, a signal representing the unbalance caused by the weight that has just been attached is detected by the vibration detector 7. 7 and stored in the second and fourth waveform storage circuits 5] and 53, respectively (■ and ■ in the figure).

When the acquisition of the two types of waveforms is completed in this way, the signal waveforms stored in the first and second storage circuits 50.51 and the third and fourth waveform storage circuits 52.53,
The signals are read out to the surface separation circuit 31 via differential circuits 54 and 55, respectively.

The signals outputted from these difference calculation circuits 54 and 55 (FIG. 3C and 2) are separated into an outside component signal and an inside component signal by the surface separation circuit 31, regardless of whether the separation ratio is appropriate or not, and are rectified and smoothed. It is converted into a DC signal by circuits 37 and 38, and converted into a signal representing the amount of unbalance.

By the way, as mentioned above, since a known amount of weight is attached only to the outside, the amount of unbalance on the inside is relatively zero.
In other words, since there must be no difference between the first signal and the second signal, the separation ratio adjuster 33 is adjusted so that the signal from the comparison circuit 61 becomes zero.

In this way, when the separation ratio adjustment is completed so that the output of the side without the weight becomes zero, the waveform signal is read out from the waveform storage circuit 50, 51, 52, and 53 again in the same way as in the above process. , first and second waveform storage circuits 50.51,
And the difference between the data stored in the third and fourth waveform storage circuits 52 and 53 is output to the surface separation circuit 31. Sensitivity adjuster 34.
Adjust 35.

At the stage when the unbalance amount calibration work is completed, or in parallel with this, the peak position detection circuit 25 detects the peak position M of the out side component signal, while the signal from the weight position storage circuit 64 is detected by the phase difference detection circuit 65. The phase shifters 27 and 28 are adjusted so that this phase difference becomes zero.

As a result, variations in the sensitivity of the vibration detector, variations in circuit constants, and variations in measurement sensitivity and peak amplitude due to changes over time are corrected, and the unbalance amount and unbalance position can be accurately indicated.

When sensitivity adjustment is completed in this way, switch S
1 to the contact a side again, the surface separation ratio, the sensitivity adjustment amount, and the phase adjustment amount that have just been adjusted are stored in the control circuit. In this state, by removing the weight from the tire, which is the rotating body to be tested, that was used for adjustment work and proceeding to normal measurement, the unbalance of the rotating body to be measured can be confirmed without the need to attach or detach the tire. The amount and the amount M can be measured accurately.

FIG. 5 shows a second embodiment of the present invention. In this embodiment, the axial length of the rotating body under test and the distance between the vibration detector 7.7 and the rotating body under test are shown. When the sensitivity calibration of one side, for example, the outside side, is completed, the distance data between the vibration detector and the rotating body under test is changed by the axial length of the rotating body under test in the dimensional data input circuit 32 such as distance. A switch S2 is provided, and on the output side of the surface separation circuit 31,
Individually adjustable sensitivity adjusters 82 and 83 are connected to each other so that they can be adjusted independently by signals from a control circuit 84. In addition, the symbols 85 and 86 in the figure are weights (
This is a setting device in which the corresponding unbalance amount and the subzero balance amount when no weight is attached are set, and two types of set values are input to the comparator circuit 61 via the switch S3 which is synchronized with the switch S21. be.

Next, the operation of the apparatus configured as described above will be explained based on the flowchart shown in FIG.

For example, the tire whose unbalance is to be measured is fixed to a rotating shaft, and the switch Sea is switched to the contact side in the figure.

When the power is turned on after completing such preparations, the value of the up/down counter 20 is stored in the memory circuit 21 as a reference position. When the motor 1 is rotated at a predetermined rotation speed after the storage of the reference position is completed, the vibration detector 7.7
A signal corresponding to the amount of unbalance of the currently mounted tire is outputted from the unbalanced tire, and these signals are stored in the first and third waveform storage circuits 50 and 52, respectively (FIG. 4, 1).

When the first signal has been captured, the motor is stopped, a known amount of weight is attached to one side of the tire, for example at the reference point on the outside, for example at the lowest point of the rim, and the rotation at this time is The signal from the position signal generation circuit 22 is transferred to the weight position storage circuit 64.
Store in.

When the motor 1 is rotated again after such preparations are completed, a signal representing the unbalance caused by the weight that has just been attached is detected by the vibration detector 7. 7 and stored in the second and fourth waveform storage circuits 51 and 53, respectively (II, ■ in the same figure).

When the acquisition of the two types of waveforms is completed in this way, the signal waveforms tm recorded in the first and second storage circuits 50.51 and the third and fourth waveform storage circuits 52.53 are , plane separation circuit 31 via differential circuits 54 and 55, respectively.
is read out.

The signals outputted from these difference calculation circuits 54 and 55 (FIG. 3C and 2) are separated into an outside component signal and an inside component signal by the surface separation circuit 31, regardless of whether the separation ratio is appropriate or not, and are rectified and smoothed. It is converted into a DC signal by circuits 38 and 39, and converted into a signal representing the amount of unbalance.

By the way, as mentioned above, since a known amount of weight is attached only to the outside side, the amount of unbalance on the inside side is relative (zero, that is, the difference between the first signal and the second signal). should not occur, so adjust the separation ratio adjuster 33N so that the signal from the comparator circuit 61 becomes zero. When the adjustment of the surface separation ratio is completed, the waveform storage circuits 50 and 51
．． A sensitivity adjuster 82 reads out signals from 52 and 53 via differential circuits 54 and 55, and adjusts the output of the outside component signal so that the outside component signal, which is the side on which the weight is attached, indicates an unbalance amount corresponding to the weight of the weight. Corrected by.

When the sensitivity calibration on the outside side is completed, operate switch S2 to read the distance data between the vibration detector 7.7 and the rotating body to be tested by the distance corresponding to the width of the tire that is the rotating body to be tested. Change to the outside of the axis and use the difference calculation circuit 54.55 again.
The signals are read from the waveform storage circuits 50 to 53 via the waveform memory circuits 50 to 53. As a result, the surface separation circuit 31 performs signal processing as if a weight was installed on the inside side even though no weight is installed on the inside side, so that this inside side component signal The in-side sensitivity adjuster 83 is adjusted so that the unbalance amount corresponding to the weight of the weight is the same as the signal from the setting device 85 inputted via the switch S3.

Further, at the stage when the unbalance amount calibration work is completed or in parallel with this, the peak position detection circuit 25 detects the peak position M of the out side component signal, while the weight position storage circuit 6
4 is detected by the phase difference detection circuit 65, and the phase shifters 27 and 28 are adjusted so that this phase difference becomes zero.

According to this embodiment, the sensitivities of the outside and inside sides are adjusted independently, which not only simplifies the structure of the sensitivity adjuster, but also allows the sensitivity of each side to be adjusted more accurately. Can be done.

FIG. 7 shows a third embodiment of the present invention, in which reference numerals 86 and 87 denote waveform storage circuits, which can store signal waveforms from each vibration detector 7 and 7. It has a capacity and stores the rotational position M as an address and the amplitude value as data. 88 and 89 are difference calculation circuits, and one input terminal has a waveform storage circuit 86.
The signal from the vibration detector 7.7 is input to the other input terminal, and the signal from the vibration detector 7.7 is input to the other input terminal, and both signals are taken out synchronously.
It is configured to output the difference therebetween to the surface separation circuit 31.

Next, the operation of the apparatus constructed in this way will be explained based on the flowchart shown in FIG.

First, fix an arbitrary rotating body to be tested, for example, a tire whose unbalance is to be measured, to the rotating shaft 2, and turn the switch S1.
Switch to the contact side shown in the figure.

When the power is turned on after completing such preparations, the value of the up/down counter 20 is stored in the memory circuit 21 as a reference position. When the motor 1 is rotated at a predetermined rotation speed after the storage of the reference position is completed, the vibration detector 7.7
A signal corresponding to the amount of unbalance of the currently mounted tire is outputted from , and these signals are stored in the first and third waveform memory circuits 86 and 87, respectively (Fig. 4, ■).

When the first signal acquisition is completed, motor 1 is stopped, a known amount of weight is attached to one side of the tire, for example, to the reference point on the outside side, for example, to the lowest point of the rim. The signal from the rotational position signal generation circuit 22 is transferred to the weight position storage circuit 6.
Store in 4.

When the motor 1 is rotated again, the vibration detector 7.7 outputs a signal representing the unbalance caused by the weight currently attached, superimposed on the signal caused by the original unbalance amount of the tire. A signal is sent from the waveform storage circuit 86.87 while being in phase with this detection signal, that is, the address of the data stored in the waveform storage circuit 86.87 is synchronized with the rotational position of the rotating test object. , the signals output from the difference calculation circuits 88 and 89 are separated into an out side component signal and an in side component signal by the plane separation circuit 31 regardless of whether the separation ratio is appropriate or not, and the signals are sent to the rectification and smoothing circuit 38. .3
9, it is converted into a DC signal and converted into a signal representing the imbalance jl.

By the way, as mentioned above, if a known amount of weight is attached only to the outside side, the unbalance amount on the inside side is relatively zero, that is, there is no difference between the first signal and the second signal. Therefore, the separation ratio adjuster 33 is adjusted so that the signal from the comparator circuit 61 becomes zero.

In this way, when the sensitivity adjustment is completed so that the output of the side without the weight becomes zero, the waveform memory circuit 86, 87 is reactivated while the rotating body is being rotated in the same way as in the above process.
The waveform signal is read out from the surface separation circuit 31 and outputted to the surface separation circuit 31, and the sensitivity adjuster 34. Adjust 351fr.

According to this embodiment, the storage capacity of the waveform storage circuit can be made as small as possible to reduce costs.

Incidentally, in the above embodiment, the signal is first obtained from the rotating body to be measured itself and then when the weight is attached, but the same effect can be achieved even if the signal is obtained by the reverse procedure. It is clear that it will play.

In addition, in the above-mentioned embodiment, explanation was given by taking as an example a direct-acting type dynamic balance test device installed vertically by a support rod, but as shown in FIG.
At the same time, the rotating body to be tested mounting fixture 92 is directly attached to the rotating body to be tested, and a triangular shape with the base to the rotating body to be tested side is assumed, and a total of three vibration detectors 93, 93, and 93 are arranged at each vertex. The vibration detector may be elastically attached to the base 95 using spring members 94, 94, 94, or the drive shaft 96 of the test object may be attached to a bearing 97 as shown in FIG.
It is clear that the same effect can be obtained even if it is applied to a type in which the vibration detector is pivotally supported and fixed to the base 99 via the vibration detectors 98, 98, and is connected to the motor 101 by the transmission mechanism 100. be.

(Effects) As explained above, in the present invention, the attachable rotating shaft of the test object is rotatably supported by two vibration detecting means at a fixed distance in the axial direction, and the rotating shaft is positioned. A test device main body having an M detection means attached thereto, and a surface separation ratio adjustment means for adjusting the ratio of the signal from the vibration detection means to separate the signal from the vibration detector into an outside component signal and an inside component signal. a surface separation circuit that adjusts the levels of the in-side signal and the out-side signal, a means for rectifying and smoothing the signal from the surface separation circuit to indicate an unbalance amount, and a signal from the scale detection means. a dynamic balance test device having means for indicating an unbalance position based on the
A step of attaching and driving an arbitrary test object and storing the signals from each vibration detection means, and driving the test object with a known amount of weight attached to it and storing the signals from the vibration detection means. a step of detecting the difference between the signals obtained in the two steps and separating the surfaces into an out side component signal and an inside component signal by the surface separation circuit;
Since the method includes a step of adjusting the surface separation ratio and sensitivity so that the indicated value of the one without the weight is zero and the signal of the one with the weight attached indicates a value that corresponds to the weight of the weight. Sensitivity can be adjusted with simple operations without the need for a rotating body provided for calibration or the work of attaching and detaching it.

Further, a test device main body is provided, which is rotatably supported by two vibration detection means at a fixed distance in the axial direction on an attachable rotation shaft of a test object, and a lightning detection means for the rotation shaft is attached. , a surface separation circuit that separates the signal into an outside component signal and an inside component signal by a surface separation ratio adjustment circuit that adjusts the ratio of the signal from the vibration detection means; and a sensitivity that adjusts the levels of the inside signal and the outside signal, respectively. A dynamic balance test device comprising an adjusting means, a means for rectifying and smoothing a signal from the sensitivity adjusting means to indicate an unbalance jL, and a means for indicating an unbalance position based on a signal from the position detection means, storage means having a capacity to store signals from each vibration detection means for at least two measurement periods; difference detection means for detecting the difference between the signals each time; Since the sensitivity adjustment means is equipped with means for operating the sensitivity adjustment means so that the indicated value becomes an unbalance amount corresponding to the weight, the sensitivity adjustment can be automated without the need for a rotating body tailored for calibration or the work of attaching and detaching it. can be achieved.

[Brief explanation of the drawing]

1(A) and 1(B) are a top view and a side view showing the main parts of a dynamic balance test device to which the present invention is applied, respectively, FIG. 2 is a block diagram showing an embodiment of a signal processing device, Fig. 3.4 is a flowchart and waveform diagram showing the operation of snow making as above, and Fig. 5.
6 and 7.8 are block diagrams showing other embodiments of the present invention and flowcharts showing their operations, and FIG. 9.10 is a side view of essential parts showing other embodiments of the present invention. It is a diagram. 1... Motor 2... Rotating shaft 3...
...Tire mounting fixture 4...Base 5...Support rod 5...Port/end 6...Vibration detector 27.28...Phase shifter 29.30...・
- Unbalance position indicator 33...Face separation ratio adjuster 34.35...Sensitivity adjuster 40.41...Unbalance amount indicator 60.61...Comparator

Claims (10)

[Claims] (1) A test device main body, which is rotatably supported by two vibration detection means at a fixed distance in the axial direction on an attachable rotation shaft of a test object, and a position detection means for the rotation shaft is attached. , a surface separation circuit for separating the signal from the vibration detector into an outside component signal and an inside component signal, including a surface separation ratio adjustment means for adjusting the ratio of the signal from the vibration detection means; It includes a sensitivity adjustment means for adjusting the level of each side signal, a means for rectifying and smoothing the signal from the surface separation circuit to indicate the amount of unbalance, and a means for indicating the unbalance position based on the signal from the position detection means. A process of attaching and driving an arbitrary test object to a dynamic balance test device and storing signals from each vibration detection means, and a step of driving the test object with a known amount of weight attached to it to detect the vibration. a step of storing the signal from the detection means; a step of detecting the difference between the signals obtained in the two steps and separating the surfaces into an out side component signal and an inside component signal by the surface separation circuit; The process consists of adjusting the plane separation ratio and sensitivity so that the signal without the weight is zero and the signal with the weight is attached indicates a value that corresponds to the weight of the weight. Calibration method for balance test equipment. (2) A test device main body, which is rotatably supported by two vibration detection means at a fixed distance in the axial direction on an attachable rotation shaft of a test object, and a position detection means for the rotation shaft is attached. , a surface separation circuit for separating the signal from the vibration detector into an outside component signal and an inside component signal, including a surface separation ratio adjustment means for adjusting the ratio of the signal from the vibration detection means; It includes a sensitivity adjustment means for adjusting the level of each side signal, a means for rectifying and smoothing the signal from the surface separation circuit to indicate the amount of unbalance, and a means for indicating the unbalance position based on the signal from the position detection means. A process of attaching and driving an arbitrary test object to a dynamic balance test device and storing signals from each vibration detection means, and a step of driving the test object with a known amount of weight attached to it to detect the vibration. a step of storing the signal from the detection means; a step of detecting the difference between the signals obtained in the two steps and separating the surfaces into an out side component signal and an inside component signal by the surface separation circuit; Among them, the step of adjusting the surface separation ratio so that the indicated value of the one without the weight is zero, and the step of adjusting the signal of the one with the weight attached so that it indicates a value that corresponds to the weight of the weight. After changing the plane separation constant by an amount corresponding to the width of the rotating body under test, obtain the plane separation signal again and change the signal for the side without the weight so that it indicates a value that corresponds to the weight of the weight. A calibration method for a dynamic balance test device consisting of an adjustment process. (3) A test device main body, which is rotatably supported by two vibration detection means at a fixed distance in the axial direction on an attachable rotation shaft of a test object, and a position detection means for the rotation shaft is attached. , a surface separation circuit for separating the signal from the vibration detector into an outside component signal and an inside component signal, including a surface separation ratio adjustment means for adjusting the ratio of the signal from the vibration detection means; It includes a sensitivity adjustment means for adjusting the level of each side signal, a means for rectifying and smoothing the signal from the surface separation circuit to indicate the amount of unbalance, and a means for indicating the unbalance position based on the signal from the position detection means. A process of attaching and driving an arbitrary test object to a dynamic balance test device and storing signals from each vibration detection means, and a step of driving the test object with a known amount of weight attached to it to detect the vibration. Obtaining a signal from the detection means, detecting a difference while reading out the stored signal in synchronization with the rotation of the rotating body under test, and separating the surfaces into an out side component signal and an inside component signal by the surface separation circuit. Then, among the component signals, the plane separation ratio and sensitivity are adjusted so that the indicated value of the component signal without the weight is zero, and the signal of the component signal with the weight indicates a value that corresponds to the weight of the weight. A calibration method for a dynamic balance test device consisting of an adjustment process. (4) An unbalanced position with a known weight attached;
A method for calibrating a dynamic balance test apparatus according to any one of claims 1 to 3, including the step of adjusting the phase of an unbalance position signal so that the positions where the weights are attached match. (5) A test device main body, which is rotatably supported by two vibration detection means at a fixed distance in the axial direction on an attachable rotation shaft of a test object, and a position detection means for the rotation shaft is attached. , a surface separation circuit for separating the signal from the vibration detector into an outside component signal and an inside component signal, including a surface separation ratio adjustment means for adjusting the ratio of the signal from the vibration detection means; Sensitivity adjustment means for adjusting the levels of the side signals, means for rectifying and smoothing the signal from the sensitivity adjustment means to indicate the amount of unbalance, and means for indicating the unbalance position based on the signal from the position detection means. In the dynamic balance test device, the storage means has a capacity to store the signals from each vibration detection means for at least two measurement periods, the difference detection means detects the difference between the signals each time, and the A dynamic balance test device comprising means for operating the plane separation ratio adjusting means and the sensitivity adjusting means so that the indicated value becomes zero and the other indicated value becomes an unbalance amount corresponding to the weight. (6) A test device main body, which is rotatably supported by two vibration detection means at a fixed distance in the axial direction on an attachable rotation shaft of a test object, and a position detection means for the rotation shaft is attached. , a surface separation circuit for separating the signal from the vibration detector into an outside component signal and an inside component signal, including a surface separation ratio adjustment means for adjusting the ratio of the signal from the vibration detection means; and an inside signal and an outside component signal. A sensitivity adjusting means for adjusting the level of each signal, a means for rectifying and smoothing the signal from the sensitivity adjusting means to indicate an unbalance amount, and a means for indicating an unbalance position based on a signal from the position detecting means. In a dynamic balance test device, a storage means has a capacity to store signals from each vibration detection means for at least two measurement periods, a difference detection means for detecting a difference between the signals each time, and an instruction for one of the vibration detection means based on the signal. means for adjusting the plane separation ratio so that the value becomes zero, means for operating one sensitivity adjustment means so that the other indicated value becomes an unbalance amount corresponding to the weight, and a constant of the plane separation circuit. A dynamic balance test device comprising means for obtaining a surface separation signal by changing only the width of a rotated body and operating the other sensitivity adjustment means based on this signal. (7) A test device main body, which is rotatably supported by two vibration detection means at a fixed distance in the axial direction on an attachable rotation shaft of a test object, and a position detection means for the rotation shaft is attached. , a surface separation circuit for separating the signal from the vibration detector into an outside component signal and an inside component signal, including a surface separation ratio adjustment means for adjusting the ratio of the signal from the vibration detection means; Sensitivity adjustment means for adjusting the levels of the side signals, means for rectifying and smoothing the signal from the sensitivity adjustment means to indicate the amount of unbalance, and means for indicating the unbalance position based on the signal from the position detection means. A dynamic balance test device comprising: storage means having a capacity to store signals from each vibration detection means for at least one measurement period; and reading out the signals from the storage means in synchronization with the rotation of the rotating body to be tested. a difference detection means for detecting a difference between both signals, and one indicated value becomes zero based on this signal;
A dynamic balance test device further comprising means for operating a surface separation ratio adjustment means and a sensitivity adjustment means so that the other indicated value becomes an unbalance amount corresponding to the weight. (8) Claims 5 to 5 include means for storing a known unbalanced position in a state in which a weight is attached, and means for adjusting the phase of an unbalanced position signal so that the position in which the weight is attached coincides with the known unbalanced position. The dynamic balance test device according to 7-1. (9) The dynamic balance test device according to any one of claims 5 to 8, wherein the rotating shaft is directly connected to a drive motor, and the motor is supported on a base via vibration detection means. . (10) The dynamic balance test device according to any one of claims 5 to 8, wherein the rotating shaft is connected to a drive motor via a transmission mechanism.