Patent ID: 7395184

Claim:
A loaded weight measurement method for a dump truck, comprising: a first step of respectively detecting a plurality of work statuses of a dump truck; a second step of respectively detecting a plurality of basic information for calculating the loaded weight of said dump truck; a third step of calculating respective loaded weight values of said dump truck in a previously established plurality of prescribed work statuses, of said respective work statuses detected in said first step, on the basis of said respective basic information detected in said second step; a fourth step of respectively storing said calculated loaded weight values; and a fifth step of outputting all or a portion of said loaded weight values thus stored, wherein said dump truck comprises: a set of equalizer bars respectively provided rotatably on the left and right-hand sides of a vehicle body; first vehicle wheels supported respectively by means of first suspension devices on one side of each equalizer bar; second vehicle wheels supported respectively by means of second suspension devices on the other side of each equalizer bar; and third vehicle wheels provided respectively on the left and right-hand sides of said vehicle body separately from said equalizer bars, and being supported respectively by means of third suspension devices; wherein said second step comprises: a step 2 A of detecting a first load applied to either said first suspension device or said second suspension device, as one of said basic information; a step 2 B of detecting a second load applied to said third suspension device, as one of said basic information; a step 2 C of detecting the angle of inclination of said vehicle body as one of said basic information; and a step 2 D of calculating said loaded weight on the basis of said first and second loads detected respectively in said steps 2 A and 2 B, and said angle of inclination detected in said step 2 C, wherein step 2 D further comprises, (a) a step 2 D 1 of calculating a total load applied to said first and second suspension devices on the basis of the ratio between the respective distances from the center of rotation of said equalizer bar to said first and second suspension devices, and said first load detected in said first step; (b) a step 2 D 2 of respectively calculating a vertical load from said total load calculated in step 2 D 1 and said second load detected in said second step, on the basis of said angle of inclination detected in said third step; and (c) a step 2 D 3 of calculating said loaded weight by adding together the vertical component of said first load and the vertical component of said second load calculated in said step 2 D 2 .