叫我小可爱
2024-05-21 10:04:43
最佳回答
an identification and principlemain identification index: diameter, material and thickness.material ** measured by way of electromagnetic, using magnetic coil air-core coil or a few groups, coil of only one group, the more common ** six groups. wo**ng conditions, and with a particular peripheral circuit of frequency oscillation (multiple coil word different frequency), when the coins in vertical or parallel plane of the way through a coil when different products (different), will cause oscillation frequency changes. qualitative different frequency variation and direction (increase), different also, for some coins for the variation character**tics, becomes in the use of coins. identifynothing special measure thickness **, in fact, th** ** the measurement and materials together. because of the same coin, even if the thickness of the material, different frequency difference ** bigger.diameter of identification device with old - to identify diameter, count queue permutation and combination proper recognition accuracy, low (not a 0.5 mm). the new with eccentric or special-shaped coil to measure, on the bas** of the coin ** small diameter and the overlap of coil, thus bring change of different frequencies.second, fangjia common principlein front of the frequency that relies mainly on the variation character**tics of acceptable for true banknote, will change its limitation in a range, and often on a false indexes and really h**e differences, were identified by the kick.an entry slot test components (usually phototubes), detect coins into will make the coil oscillation and started back, at the same time, record frequency value calculation changes.a coin normally ** stuffed into the mouth, then along the structure design, good slot will h**e certain rolling speed, through the coil time ** limited (within), and speed 500ms ** uniform. so, th** as a judge index, a slowly into the coin ** not acceptable.third, the common security principlemainly rely on complex structure design of theft.the index of the agreement, speed, and that ** true, will soon add money, confirmed the deal? no. behind will h**e some way of defense, first ** an electric control of the door, and the channel after confirmation of photoelectric detection **, by the door, coins door was closed (in some cases, th** side of the blade, if use metal wire hanging what coins, crack ~ ~ ~). then coins may directly into storage box or coins into a temporary institutions after entering reservoirs in box, th** process may also h**e a photoelectric detection process, any twice a coin, cannot will confirm with coins.design well, through the door, coin once again could not pull out from the entrance, only the idea from the refund mouth pull out, but if a refund mouth also adopted special design, it ** an impossible task. 20210311