Sensor principle reachs working process

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  • source:MCGUFFIE CNC Machining
Stick on a paragraph of tailor-made stretch axis affix appropriative to measure twist should piece comprise change the bridge, it is fundamental torque sensor namely; Fixed on the axis: (1) the sources of energy is annular the secondary coil of transformer, (2) signal is annular transformer is primary coil, (The printed circuit on 3) axis board, rectification stabilized power supply, appearance is included to magnify circuit, V/F alternates circuit and signal output circuit on circuit board. Fixed on the crust of sensor: (1) excitation circuit, (2) the sources of energy is annular the primary coil of transformer (input) , (3) signal is annular transformer secondary coil (output) , (4) signal handles circuit 5 jobs process provides ± 15V power source to sensor, the crystal oscillator in excitation circuit generates the square wave of 400 Hz, generate power supply of communication excitation power namely through TDA2030 power amplifier, through the sources of energy the primary coil that T1 Cong Jing stops delivers annular transformer to rotating secondary coil, the circuit of rectification filter wave that gotten alternating current source passes an axis to go up gets ± the direct current source of 5 V, this power source makes the working power supply of operation amplifier AD822; The high accuracy regulated power supply that puts AD822 composition by AD589 of fiducial power source and double carry produces ± 4.

The accurate direct current source of 5V, this power source regards bridge as power source already, regard the job of amplifier and V/F converter as power source again. Suffer when stretch axis when twisting, bridge of meet an emergency detects the signal of meet an emergency of gotten MV degree magnifies through appearance amplifier AD620 1.

The strong signal of 1v of 5 V ± , LM131 of repass V/F converter alternates Cheng Pin leads signal, press through signal annulus deformation implement T2 is delivered from rotating primary coil to dormant secondary coil, the torque that the wave of filter of signal processing circuit on repass sensor crust, plastics can get sufferring with stretch bearing becomes the frequency signal of direct ratio, this signal is TTL n, can offer already special 2 times appearance or frequency meter show also can send the computer processing directly. Because should rotate,transformer is moved- - the space that there is zero millimeter only between static annulus, together with sensor the part on the axis is sealed it is in metallic crust, form effective screen, because this has very strong interference rejection capacity. The frequency signal that this sensor outputs is 10kHz when 0 o'clock.

Xiang Xuan turns 15KHz is when full span.

Rotate reversely 5KHz is when full span. Namely full span variable is counted for 5000 / every second. Rotate speed is measured use photoelectricity gear or the measurement technique of magnetism phone gear, axis every rotate a week can produce 60 pulse, the method that measures frequency can be used when high speed or middling speed sampling, the method that measures cycle can be used when low speed sampling. This sensor precision can amount to ± 0.

2% ～ ± 0.

5% (F · S) . Because sensor output is frequency signal, so need not AD changeover can send to the computer to undertake data processing directly. CNC Milling