What is the principle and structure of the money detector? The laser money detector applies a unique anti-power network influence power supply circuit in the bottom pressure difference regulated power supply circuit of the design scheme. The electromagnetic interference is substantially cut off, and the influence from the municipal power grid and the body static interference are removed. In the data signal power supply circuit, techniques such as frequency selection and filtering are also used to further strengthen the anti-interference of the equipment.
Basic composition
The banknote detector is composed of six parts: twisting, issuing, receiving, sound card rack, display screen and electronic circuit.
part of the twist
The key is composed of banknote sliding plate, banknote feeding tongue, friction resistance eraser, banknote dropping plate, adjusting screw, banknote twisting rubber ring, etc. Twisting out the banknotes to be checked one by one is a prerequisite for accurate counting. The equipment adopts the continuous grade classification of face-to-face banknotes: the twisting rubber ring twists a banknote on the surface, and the lower banknote is stuck by the friction resistance eraser, so that the surface banknote is separated from the lower banknote to complete the separation. This whole process continues iteratively until the final banknote is twisted.
Because of the inconvenience of replacement, the wear of the money-twisting rubber ring and the friction resistance eraser has always been a major difficulty for everyone. To deal with this problem, it is nothing more than: 1. Increase the service life; 2. It is convenient to replace and replace. For the money-twisting rubber ring, we can choose to increase the diameter and open a concave groove in the middle of the outer circle to improve the wear resistance of the money-twisting rubber ring. The surface of the apron journal is increased relative to the banknote, which improves the adhesion of the apron teeth to the banknote.
For the eraser in the picture, a very simple way is to use the friction resistance eraser quick-change structure, and use the hand to clip the rear end of the lower banknote plate to develop, and it is very easy to remove the friction resistance eraser for replacement.
part of the cash
The key is composed of the cash-out cover belt and the cash-out counter-rotating shaft. Its function is that the money-out apron reasonably separates the banknotes that continue to be sent ahead from the banknotes behind at twice the angular velocity of the twisting apron, and sends them to the electronic counter and detection sensor for counting and counterfeiting.
The banknotes leave the twisting rubber ring and enter into the banknote dispensing rubber ring. What is the principle and structure of the banknote detector? Because the TD series product banknote detector is lower than the total width of the checked banknotes (maximum 77mm) because the intermediate lifting distance between the twisting shaft and the banknote output shaft (60mm), the remaining total width of the banknotes will cause The relative friction between the money-twisting rubber ring and the banknotes reduces the service life of the money-twisting rubber ring.
The method of widening the middle distance between the banknote outlet and the banknote twisting shaft (the middle distance between the banknote outlet shaft and the banknote twisting shaft is 80mm) can be used to prevent the occurrence of this series of friction. Because the distance between the twisting shaft and the note-discharging shaft is widened, in order to better ensure the successful fitness movement of the banknotes from the twisting wheel to the note-discharging wheel, a pair of passing wheels are improved. The angular velocity of the outer edge of the passing wheel is equivalent to the bill-twisting glue. The angular velocity of the outer edge of the ring, the angular velocity of the outer edge of the note dispensing rubber ring is twice the angular velocity of the outer edge of the note twisting rubber ring.
When the outer edge of the bill-feeding rubber ring is twisted to the bill, the bill will exercise at twice the original speed, so that the wear of the bill-twisting rubber ring will be transferred to the passing wheel, and the metal composite material is used for the wheel. The service life of the banknote rubber ring has been increased several times.
Although raising a pair of passing wheels can increase the service life of the money-twisting rubber ring, the problem is that the cost increases, the structure is cumbersome, and the maintenance is inconvenient. If you do not lift a pair of passing wheels, but use an overrunning clutch (other than a one-way bearing) on the selected banknote twisting shaft, it can have the same effect. The basic principle is as follows: the one-way bearing is installed in the banknote twisting transmission system wheel. , which can rotate in the opposite direction relative to the twisting axis.
When the banknote is twisted, the wheel of the banknote-twisting transmission system rotates clockwise, and the one-way bearing does not rotate, which plays the role of transmitting the driving force. Due to the effect of the unilateral bearing, the outer edge of the banknote twisting apron moves at the same speed as the banknote, and there is no relative sliding between the banknote and the banknote twisting apron, so the service life of the banknote twisting apron can be extended.
Part of receiving money
The key is composed of the cash-receiving claw wheel, the cash-removing plate, the cash-blocking plate, etc.
After checking, the banknotes are stuck into the different claws of the banknote receiving claw wheel, and the banknotes are taken out by the banknote removal board and stacked neatly. What is the principle structure of the banknote detector? Flying banknotes are common in banknote detectors. To deal with this problem, we must pay attention to three aspects: one is the central part of the centrifugal impeller management of the banknote receiving machine, the second is the shape of the leaf claw, and the third is the centrifugal impeller speed ratio.
(1) Clarification of the central position of the centrifugal impeller management center: the centrifugal impeller management center of the banknote receiving should be as close as possible to the banknote output shaft. Make sure that the bill does not fly due to the card being too shallow.
(2) Appearance of the leaf claw: The graph should show that there is a bending deformation after the banknote is inserted. The greater the deformation of the banknote, the less likely it is to slip off.
(3) Speed ratio of centrifugal impeller: The faster and faster the centrifugal impeller speed ratio is, the easier it is to fly the banknotes, but very slow banknotes will hit the bottom of the leaf claw. The centrifugal impeller speed ratio and the counting rate are related to the total number of claws.
Part of the transmission system
A part of the transmission system can choose a single motor or dual motor drive, and the motor will transport the driving force to each rotating shaft according to the belt and the transmission system wheel. The selection of dual motor drivers is convenient to complete the preset number function. The motor can choose AC or AC motor, because the key of the motor and the transformer is very big. If the AC motor is selected to cooperate with the power transformer, the net weight of the whole machine can be greatly relieved.
Sound card rack parts
Practical experience The actual effect of selecting the punching working pressure side beam is good. The advantage of choosing this type of design is that the parts of the left and right side panels of the sound card rack with high relative precision can be produced and processed by the same mold at one time, which improves the installation precision of the sound card rack and reduces the cost. It also provides the required level of accuracy for reasonable identification of banknotes in fitness activities.
Electronic circuit
A system software designed and operated by a single-chip microcomputer is composed of a part of the main control chip, sensor components, light-driving parts, and power supply boards. According to several sockets, the purple light, magnetic, infrared transmission, and counting data signals are introduced into the main control chip.
Carry out statistical analysis, sampling and identification of the data signals received by each sensor in all normal banknotes in all normal checks, and deposit them as the basis for inspection. When checking banknotes, compare and distinguish the main parameters of the data signal received at the interface of each channel with the main parameters of the data signal originally deposited. If there is a significant difference, immediately send it to the reporting system and stop the motor, and send out another Matching data signal alerts.