Patent EA-000241-B1 (EA)
Title: Method of measurement mechanical power effects between material objects and apparatus therefor
Inventor: VISHNEVSKY ALEXANDRE STEPANOVI
IPC: G01G21/28
Filed: 1997-02-17
Abstract: 1. Method of measuring mechanical power effects between material objects comprising bringing into contact interacting objects and measuring blocks, measurement of electromechanical parameters, determined by the value of power effect, transmitting the information of said parameters from said measuring blocks to a microprocessing block, processing said parameters and obtaining values, characterizing the measured effect, wherein n1 measuring blocks are arranged between voluntarily located material objects, where n1 is selected within limits 1 <= n1 <= 10<3> along lines of their interaction so that an angle α between vectors of power effects of material objects and axises of optimum measuring effect upon the block is selected within limits 0 <=α <= 89 degree , part of n2 measuring blocks are arranged for measuring normal, that is directed along lines of action of measuring force, components power effects, where n2 is selected of provision: 1 <= (n1+ n2)/n1 <= 2 and a part of n3 measuring blocks for measuring tangential, that is directed perpendicular to line of action of measuring force, component power effects, is selected of provision: 1 <= (n3+ n1)/ n1 <= 2, providing a ratio between tangential P1i and normal P2i constituting measuring power effect within limits 1 <= (P1i + P2i)/ P2i <= 100, where 1 <=i <= n1, wherein part of n4 measuring blocks, is selected of provision: 1 <= (n5+ n1)/ n1 <= 100 use for calibration of normal and tangential components of power effects as a measuring electromechanical parameter, associated with a power mechanical effect select a change δCi capacitance Ci0 of capacitor made as a group of membrane, forming a sensor of each measuring block, depending on the value of power effect Pi convert parameter δCi/ Ci0 in corresponding to it paramete-frequency f1 of electrical signal, associated with δCi/ Ci0 by ratio   where 10 <= a1i<= 10<6> Hz; 0.1 <= A2j <= 10; 1 <= i <= n1; 1 <= k <= 10; 10<-18> <= |b2i| <= 10<22>, so 10<-3> <=f1 <=10<8> Hz, depending on the membrane material, their design parameters and a range of working loads, convert combination of fi, using dependency fi = kifiet, wherein 10<-2> <= |ki| <= 10<2> and the unknown quantities of power effects Pi are determined upon the dependancy:   where 10<-3> <=Ai <= 10<3>; 10<-20> <= | Bij | <= 10<20>; -10 <= a3ij <= 10; 10<-3> <= fiet <= 10<8> Hz are experimental parameters selected depending upon the membrane material, their design features and the range of working loads. 2. Method as claimed in Claim 1, wherein said unknown features of power effects Pi are determined upon the dependancy :  Pi =Ai +Bi1fi + Bi2fi<2>, where 10<-3> <= A1 <= 10<3>, 10<-20> <= | Bij |<= 10<20>. 3. Platform apparatus for measuring mechanical loads between material objects, comprising mounted on adjustable rests base platform with disposed on it mesuring blocks of power loads, and load-bearing platform, mounted on support parts of said blocks, characterized in that relation of L1 length to distance L2 between maximum remote points of the load-bearing platform is selected of provision that 0.01<= L1/ L2<=0.5, minimum distance L3 along straight line, passing through geometric center of the load-bearing platform between points of blocks loading and maximum value L4 of this distance are interacted by the ratio 0.1<= L3/ L4<=1, relation of value L4 to L2 value is selected of provision that 0.5<= L4/L2<=1, sensors of measuring blocks are made as two load-bearing membranes, variable thickness d on the surface of each membrane is selected depending of its maximum cross dimension L5 of the provision that 10<-6> <= d/L5 <= 10<2>, wherein the ratio of minimum distance L6 between membranes to maximum cross dimension L5 is selected of the provision that 08 <= L6/ L5 <= 10, minimum S1i and maximum S2i values of lining area of each measuring condenser rigidly fixed with load-bearing membranes are selected of the provision that 0.1 <= S1i/S2i <= 1. 4. Platform apparatus for measuring mechanical loads between material objects, comprising measuring blocks arranged on the base and connected via power-carrying unit with the supporting unit wherein the base and the supporting unit are made as a cantilever, said cantilever of the supporting unit consists of two units-a unit of applying outer effects and a unit of transferring power effects, power-carrying unit is arranged on the unit transferring power loads of the cantilever and connected with the measuring blocks, wherein the distance L11 between the points of applying power loads to each measuring block with respect to the distance L12 between the points of the resulting vectors of outer power loads applying to the cantilevers of the base and the supporting unit is selected of the provision that 10<-2> <= L11/L12 <= 1 and angle δ between the axis of optimum power load upon each measuring block and the direction of the resulting vector of outer effect is selected of the provision that 0 degree  <= δ <= 10 degree , distance L13 between the point of the resulting vector of outer power load to the case and points of power load transfer from the base to the measuring blocks and the distance L14 between the point of the resulting vector of outer power load to the supporting unit and points of power load transfer of the supporting unit to the measuring blocks are selected of the provision that 0.1 <= L13/L14 <= 10. 5. Platform apparatus as claimed in Claim 4, wherein the cantilever of the base as made as a cramp with ratio of minimum its dimension L15 to maximum its dimension L16 is selected of the provision that 0.1 <= L15/L16 <= 10. 6. Platform apparatus as claimed in Claim 4, wherein the cantilever of the supporting unit has a clamp-like shape with ratio of minimum its dimension L17 to maximum dimension L16 is selected of the provision that 0.2 <= L17/L16 <= 5.