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Belt tension meter 1.9
It is a sonic belt tension meter. Calculate the tension (unit: N)ofthe belt (timing belt etc) tightened between the pulleys fromthefrequency when the belt is played. Measurement method 1,initialsetting I will set the belt. 1) Press the setting button.Enter thestate of the belt you want to measure. 1, the number ofteeth of theleft and right pulleys and the number of teeth of thebelt. 2, pitchof belt mm. 3, Unit Length Weight g / (m · mm) ≒Belt Width: 1 mm xBelt Length: Weight of 1 m g. 4, width of beltwidth mm. Note) Whenthe unit of weight per unit weight of belt iskg / m (weight per kg)3, W (kg / m) x 1000 in unit length mass 4,Please enter 1 in thewidth of the belt! 2, measurement 1) Move thesmartphone's caller tothe center of the belt you want to measureand press the startbutton. (The display under measurement will bedone.) 2) Play thecenter part of the belt and generate a soundlike a string. (Whenplaying the belt, its frequency converges to acertain frequencycorresponding to the tension of the belt.) 3) Ifvibration of acertain frequency of the belt is detected, thetension (unit N) ofthe belt calculated by setting the frequency ofthe sound when it isdetected, its frequency and the belt set with1 is displayed on themonitor. (If you do not measure well, tryremoving the surroundingnoise or adjusting the sensitivity (+ -button)) Increasing thesensitivity cuts out small soundvibrations, and conversely loweringthe sensitivity also detectssmall sound vibrations, but it makesdetection of noise noiseeasier. The maximum detection frequency is400 Hz. Caution Thistool uses the recording function of smartphone, and obtains theobtained waveform A certain frequency isdetected with a simplemethod. For this reason, please usemeasurement results andaccuracy as a guide only. RemarksCalculation formula of belttension conversion from frequency iscarried out by the followingcalculation. Remarks Calculationformula of belt tension conversionfrom frequency is carried out bythe following calculation. Hz:Measurement frequency / sec T 1:pulley 1 number of teeth T 2:Number of pulleys 2 teeth B: Number ofbelt teeth P: Belt pitch mmM: Belt unit mass g / m.mm (1 mm width x1 m belt weight g) W: Beltwidth width mm Note) When unit of massper unit weight of belt isset to kg / m (weight per kg) M = W (kg /m) x 1000, w = 1 (mm)Please enter! Z: Pulley shaft length S: lengthof linear portion ofbelt R1: Pulley 1 radius R 2: Pulley 2 radiusPi: Pi = 3.14 ,,, R 1= t 1 × p / pi R 2 = t 2 × p / pi Z = (b + (b^ 2- 8 x (r 1 - r 2)^ 2) ^ 0.5) / 8 S = (Z ^ 2- (r 1 - r 2) 2/4)0.5 Belt tension N = 4× m × w × S ^ 2 × Hz 2 × 10 ^ - 9
