The problem of the waste money of the OP machine

- Jun 28, 2018-

With the arrival of the hot and humid weather, the problem of OP machines' waste money has been placed in front of everyone. Although the measures are available every year, the waste notes are still in the air every year. I don't remember how I spent the summer last year, and the waste money became a problem that we could not get past.

What's the problem? We are not R & D personnel, we can not understand and modify the core part of the device. How to do this is to whine about here, and we all express our opinions, hoping that researchers can see that we can find a solution to this problem.

(the content is only deductions, failed to verify)

First of all, from the double test of OP, OP double detection inherits 1000 structure basically, but it has been improved on FW. The original 1000 fixed double judgment method was changed to intelligent (that is, the dual adaptive free adjustment function of the OP channel that everybody said). This improvement has always been a dispute. The biggest place. The equipment uses the thickness of the first few notes as the reference voltage of the double. It is regrettable that the designers are overly optimistic about the number of times and the extent of the breakage of the RMB. It is more accustomed to cash transactions in China. The wear and tear of RMB is far more serious than that of foreign currency. When a large number of paper money with thick bottom is discarded when it passes double, it will cause many reasons for the use of new and old coins.

The second was the special climate in Fujian. After July, Fujian entered the damp heat. The paper currency was dampened seriously, and the friction between the damp paper money increased. We once confirmed this. It can be greatly improved by changing the humidity of paper money and increasing the friction of money.

The last point is from the circuit part of the double test. The dual test is designed to be 55-85mil (MIL is a unit of length called mil 1mil=0.0254mm) sensitivity of 0.044-0.058V/mil, the thickness of the new RMB is 4mil, and the voltage fluctuates at 0.16-0.21V, which may be discarded over this parameter. From the note itself, the thickness expansion of the paper after the moisture absorption leads to the temperature characteristic of the other double circuit, all the electronic components have temperature characteristics. Whether the double circuit uses the temperature compensation design, if there is no temperature compensation in the current use environment in Fujian, the error of the circuit itself is enough to make it sufficient. Double voltage fluctuation exceeds the range. From the bottom data of OP, we can see that the basic waste note types are EARLY DOUBLE, which may confirm the above two conjecture.