SU930025A1 - Device for measuring physical parameters on a rotating object housing - Google Patents

Description

(Bk) DEVICE FOR MEASURING PHYSICAL

PARAMETERS ON THE CASE OF ROTATING OBJECT

one

 The invention relates to a measurement technique, specifically to the measurement of parameters on the casing of a rotating technological unit, and is intended for use in rotary kilns of the cement, chemical and metallurgical industries.

Devices are known for measuring temperature, heat flux and deformation on the housing of a rotating object, in which the signal from the rotating part to the fixed part is transmitted by a contactless method l} or by a contact through collector rings.

These devices allow measurement of the parameter of interest and transmission of information about it to a stationary object, however, when transmitting a signal from a rotating part not stationary, interference may have arisen, and for many devices the accuracy of measurement and transmission of information depends on the diameter of the rotating object and its speed rotation

The closest in technical essence to the present invention is a device for transmitting information about the temperature and deformation of a rotating part to a stationary recording device containing primary transducers of measured parameters to voltage, an amplifier of this voltage and a frequency recording device. The transfer of information from the rotating part to the fixed part is carried out by placing one plate of the output capacitor on the moving part, and the second on the stationary one.

Claims (3)

The signal for changing the value of the capacitor of the Capacitor is converted into a current and is fed to a recording device. In this device, the elements of the rotating part are powered from an autonomous power source (normal elements or batteries) located in the same place Z}. A disadvantage of this device is the presence of a power source on the housing of the rotating part, since this does not allow for a long time, without stopping the apparatus, to operate the measuring set. Moreover, when the transverse vibrations of the rotating part (object) occur, significant error occurs by changing the distance between its plates. These reasons do not allow this device to be used in measurements, for example, on a rotary furnace body having a significant diameter (m) and for a long time (about 10 V-month, working without stopping. The purpose of the invention is to improve the accuracy and reliability of information transmission from a rotating object to a stationary object. This goal is achieved in that a device for measuring physical parameters on the body of a rotating object containing converters of measured parameters into a voltage, an amplifier of this voltage and a frequency recorder The power amplifier, the voltage amplifier of the parameter being measured is connected to the additional voltage-frequency converter which is connected to the frequency recorder via collector rings. The stabilized voltage source is connected through current-collecting rings to the frequency recorder. To the current collector rings frequency converter into current, to the output of which a current device is connected. Different types of signals - direct current supply voltage and output variable in terms of frequency current from up to 8 kHz - allows the use of the same contact slip rings. The presence of standard secondary frequency recorders themselves with a unified input signal rio frequency change from A to 8 kHz (devices of the VPN series allow to do without additional converters. The drawing shows a block diagram of a device for measuring physical parameters on the body of a rotating object. The device contains primary converters 1 - 3 amplifier k voltage of direct current, slip rings 6, recording device 7, converter 8 and current device 9. Signal from one of the primary converters The first 1–3 measured parameter is fed to a DC voltage amplifier k, and then to a converter 5 that converts a voltage signal into a frequency signal that is fed through contact rings 6 to a frequency recorder 7f or through a frequency to frequency converter 8 to the current device 9. The circuit is powered from a stabilized source of direct current voltage 10. The device can be implemented on the basis of a plane differential temperature (also conventional a strain gauge). The voltage-to-frequency converter has a linear characteristic of the output signal over the entire 13 input signal range. The sensitivity of the transducer is not worse than 1 kHz / mV. The invention allows to achieve higher accuracy of measurement on rotating objects of such parameters as temperature, heat flux, deformation due to the fact that the magnitude of the frequency signal transmitted through contact rings remains constant when the resistance changes in the brush contact and does not depend of the speed of rotation of the object and its diameter, as well as the use of minimum contact rings (in principle, it is possible to transmit a signal through one ring to the body of a rotating object) of the simplest design. Claim 1. Device for measuring physical parameters on the body of a rotating object, containing primary transducers of measured parameters to a voltage, an amplifier of this 5 voltage and a frequency recording device, characterized in that, in order to improve the accuracy and reliability of information transfer from the rotating part to fixed, voltage amplifier of the measured parameter, meter connected to the additionally inserted voltage converter into the frequency, which is connected to the frequency recorder woo through collector rings. 2. A device according to claim 1, characterized in that the stabilized voltage source is connected via current collector rings to a frequency recorder. 3. The device according to PP. 1 and 2, characterized in that a current converter is connected to the current collector rings, to the output of which a current device is connected. Sources of information taken into account in the examination 1. US patent k, cl. 310-68, 20.05.69. . 2. USSR author's certificate No. 526783, cl. G 01 K 13/08, .06 .. 3. USSR author's certificate No. 6fn, cl. G 01 K 13/08, 1963.