How to calculate the conversion coefficient of force sensor

1.

What is the meaning of conversion coefficient K of force sensor

A: its meaning can be expressed as the average value of reading change for each additional weight

example:

the conversion coefficient of the force sensor is calculated by the successive difference method

if it is an even number, it is directly divided into two groups: suppose there are eight data, which are divided into (1,2,3,4) and (5,6,7,8), and the corresponding values of the former group are subtracted from the latter group, such as 5-1,6-2; Then add these differences, divide them by 4 (each group has 4 data), and then divide them by a 4 (= 5-1 = 6-2 = 7-3 = 8-4). You can get what you want. If you give it meaning, it can be expressed as the average value of reading change for each weight added. If the number of experiments is odd, you just need to reuse the middle number. For example, there are 7 groups of data, 1,2,3,4,5,6,7, and the components are divided into (1,2,3,4) and (4,5,6,7). Just divide by 4 (each group has 4 data), and then divide by 3 (= 4-1 = 5-2 = 6-3 = 7-4). The application condition of the successive difference method is that the independent variable changes at equal intervals (such as reading data at equal intervals on the screw rod or screw micrometer), and the function relationship is linear. When the function relation is nonlinear, it can't be dealt with by the successive difference method. In addition, it must be remembered that when using the successive difference method, the data measured at equal intervals should be divided into two groups in half, so that the calculation results are more accurate

2. You don't need Limin. What area do you use to measure this lile? As long as the surface of the sensor has a certain area, attached to the liquid surface, lift up, measure the force divided by the attached area is the tension coefficient. This is the simplest. I didn't think of a more economical way.

3. According to the technical specification of Cheng Shengying measurement and control scientific:
sensitivity refers to the ratio of output change △ y to input change △ x under steady-state working condition< It is the slope of the output input characteristic curve. If there is a linear relationship between the output and the input of the sensor, then the sensitivity s is a constant. Otherwise, it will change with the input

the dimension of sensitivity is the ratio of output to input. For example, when the displacement of a displacement sensor changes by 1 mm and the output voltage changes by 200 mV, its sensitivity should be expressed as 200 mV / mm

when the output and input dimensions of the sensor are the same, the sensitivity can be understood as the magnification.

4. Sensitivity coefficient = change range of evaluation index (here is fnpv) / change range of sensitive factor (here is investment amount)
= (55-105) / 105 / (1000-1200) / 1000
= (- 47.62%) / (+ 20%)
= 2.381

5. Sensitivity coefficient = change range of evaluation index (here is fnpv) / change range of sensitive factor (here is investment amount)
= (55-105) / 105 / (1000-1200) / 1000
= (- 47.62%) / (+ 20%)
= 2.381

6. Because the internal rate of return dropped to 8%, so △ A / a = (18% - 8%) / 18%

Proct Price: s (AF) = △ A / a divided by △ f / F, the result should be[ 18% - 8%) / 18%] / 3% = 18.52
raw material price: [18% - 11%) / 18%] / 3% = 12.96
Construction Investment: [18% - 9%) / 18%] / 3% = 16.67

proct price is the most sensitive

sorry, I don't understand the answer

7. 1.9mv

8. You don't need Limin. What area do you use to measure this lile? As long as the surface of the sensor has a certain area, attached to the liquid surface, lift up, measure the force divided by the attached area is the tension coefficient. This is the simplest.

9. Well, I saw the problem by accident. After a careful study, I found that this question was raised very well. Usually, I took it for granted that I knew it and didn't calculate it carefully. The calculation method is as follows:
1. Usually we say the equivalent focal length is relative to 135 film, so the size of 135 film should be very clear, that is, 24mm in length and height, 36mm in width, and 43.2666mm in diagonal
2. Because the CCD size of G12 is 1 / 1.7 inch (Note: This is inch, which will be discussed later)
so its diagonal size (not considering the aspect ratio) is 1 / 1.7 * 16 = 9.412mm
3. Focal length ratio = 43.2666/9.412 = 4.597< Since the actual focal length of G12 is f = 6.1-30.5mm, the equivalent focal length should be (6.1x4.597) - (30.5x4.597); That is 28.04mm ~ 140.21mm, roughly 28-140mm
the above is the calculation process

I guess the landlord may not be able to figure it out all the time, not because of the wrong method, but because of the lack of a concept: that is, "the instry's general standard is 1 INCH CCD size = 12.8mm long x 9.6mm wide = the corresponding area of 16mm diagonal." It is not the concept of 1 inch = 25.4mm
as to why one inch should be calculated by 16mm, I mentioned "inch" just now. That can be traced back to the technology of CRT in the laboratory in the 1950s. You can find and learn the relevant information.

10. Where to switch? There is a linear relationship between the electrical signal from the pressure transmitter and the pressure range
for example, the transmitter outputs a voltage signal of 0-10V, and the measurement range is 0-1mpa. The pressure change of 0-1mpa corresponds to the voltage signal of 0-10V. 0V corresponds to 0mpa, 10V corresponds to 10MPa
there are also transmitters with output of 4-20mA current signal, which is the same. Corresponding calculation is enough.