If the amount of change is greater than a predetermined percentage threshold, the alert is generated. The rotor is brought up to speed, and data is collected as during the reference run. The “D” indicates that in this example the weight plane has discrete weight adjustment locations. Acceleration is the measurement of the change in velocity or speed divided by time. Also displayed in the tach options screen is another piece of data that is downloaded, the location of the rotation sensor. An angle sensor, attached to an axial face or appendage of the rotor, is used to determine the correct rotor orientation. In the preferred embodiment, the unbalance component is determined by measuring synchronized radial vibration at the rotational speed of the rotor In an alternate embodiment, the precise placement of the weight on the second weight plane is accomplished by using the angle sensor as described above.
Also included in the set-up data downloaded from the host to the instrument 10 are the speeds at which the rotor is to be balanced. If the unbalance component is less than this amount, a low unbalance vibration alert signal is generated, and a warning is displayed to the technician as depicted in FIG. There is displayed within the data stability box a stability indicator There may also be other conditions which either prevent the rotor from ever achieving steady-state operation, or intermittently affect steady-state operation. For example, this location could be an access hole in the rotor casing, or top dead center on the rotor , or any other predetermined location as entered into the instrument 10 by the technician. IRD Form
In the preferred embodiment the downloaded data includes comments by technicians who have previously balanced the rotor. The processor performs all the calculations necessary to analyze the digital vibration, rotation, and angle data. The balancing instrument 10 also includes a rechargeable battery 90, a processorand a memory The technician places the weight, and performs another run to verify that the rotor has been brought within allowable balance tolerances.
The rotation sensorpreferably a tachometer, is connected to the rotation sensor communications port 70 by wire in this example. In the preferred embodiment, up to six speeds may enek specified for a job. In the preferred embodiment it is necessary only to perform a tolerance check because the instrument 10 already contains the balancing data as recorded during the previous balancing procedures, thus further decreasing the time and expense required to balance the rotor.
The first is a host communications port for communicating with a host computer. Using this information, the instrument 10 alerts the technician, either audibly, visually, both, or in some other manner, that the desired location of weight adjustment is in a predetermined location.
There may also be other conditions which either prevent the rotor from ever achieving steady-state operation, or intermittently affect steady-state operation. The data downloaded from the host includes all of the set-up and measurement data collected when the rotor in question was last balanced. These graphics are responsive to the vibration amplitude deviation signal, and indicate when the vibration amplitude deviation signal is greater than a predetermined value, and when the vibration amplitude deviation signal is less than the predetermined value.
The instrument displays “AXIAL” in this column when a sensor is so aligned relative to the rotor The rotation sensor in this example is connected to the instrument 10 by a wire through the rotation sensor communications port Ask seller a question. An example of an acceptable sensor type is model P available from Computational Systems, Inc. There is also shown on the screen the rotation direction notation and arrowwhich again represent the direction of rotation of the rotor It will be appreciated that instead of a wireanother communication media such as infrared or radio could be used.
In an ijternational embodiment, the signal conditioner 51 is also connected to the angle sensor communications port 80, which in this example communicates with the angle sensor by means of wire A rotation sensor provides rotation data.
In alternate embodiments both influence information and influence coefficients are stored and uploaded to the host computer Method and apparatus for detecting an unbalance on a rim having a wheel of a motor vehicle during running of the motor vehicle. If this is the first time the rotor has been balanced, and internatiknal data has never been entered for the rotor, the internxtional described above is loaded in manually by the technician using the interface Graphic display elements in the form of a polar chart are responsive to the vibration amplitude signal, in that they appear as vectors and endpoints, the length of which correspond to the value of the vibration amplitude signal.
Watch the auction as a guest. When this condition exists, the routine generates a synchronous axial vibration alert signal. The rotation analysis routine screens the rotation data to see if the rotation speed is within krd predetermined tolerances listed in the set-up data, typically provided by the technician.
There is shown on the left side of the weight plane definition screen a graphical representation of a rotor weight plane. When the trial runs are completed, the technician calculates influence coefficients using the data sets collected from the reference and trial runs. In accordance with one embodiment, a portable, hand-held, battery-powered balancing instrument is provided.
The apparatus of claim 22 further comprising: Located on the representation are two measurement sites By use of this angle sensorthe instrument 10 ensures that the technician will place the weight in the correct location, regardless of the direction in which the rotor is being rotated, or from which end of the rotor the technician is working, so long as the technician ensures that the rotation direction notation and arrow are pointing in the correct direction for normal rotor operation rotation for the end at which he is working.
You can contact the auctioneer on for more information. Detecting imbalance in motor vehicle wheel involves detecting imbalance as vehicle is being driven using wheel sensor, transmitting detected values from sensor transmitter to receiver.
IRD Model The apparatus of claim 12 wherein said display further comprises: Also displayed in the tach options screen is another piece of data that is downloaded, the location of the rotation sensor. We are making things easier for you, auction specific shipping information coming soon.