CN100555147C - Accurate detent mechanism of paper banknote identifying movement position multiple optical coupling differential and localization method thereof - Google Patents

Abstract

The present invention relates to a precise positioning mechanism and positioning method for banknote identification movement positions based on multi-optocoupler differentials, and relates to a positioning mechanism for identification movement positions of banknotes and bills that is compatible with banknote counting machines, sorting machines, paper bill counting machines, and the like. positioning method. The structure includes a speed measuring disc, several photoelectric couplers, and a pulse circuit; the speed measuring disc is installed on the side of the drive shaft of the counting machine, and several photoelectric couplers are installed on the edge of the speed measuring disc. The output terminal of the coupler is connected with the input terminal of the pulse circuit; the pulse circuit includes a monostable trigger, an OR circuit, and a multiplier circuit; the signal input terminals of the monostable trigger are respectively connected with the output terminals of the photocoupler, and the monostable The output end of the device is connected with the input end of the OR gate circuit, and the output end of the OR gate circuit is connected with the input end of the multi-frequency multiplication circuit, and the signal output end of the multi-frequency multiplication circuit provides a real-time sampling clock signal of the A/D converter of the control system through a signal line.

Description

Multi-optocoupler differential precise positioning mechanism and positioning method for banknote identification movement position

technical field

The present invention relates to a banknote identification movement position multi-optocoupler differential precise positioning mechanism and a positioning method thereof, which relate to a banknote and bill identification movement position positioning mechanism that is matched with banknote counting machines, sorting machines, paper bill counting machines, and the like. its positioning method.

Background technique

At present, in banknote counting machines and banknote sorting machines, the inherent clock signal in the applied equipment circuit is used as the estimated value of the moving distance of the visual object, so that the measurement when the visual object moves in the channel is an open The estimated value of the ring is not exactly the same as the actual movement of the measured object, such as pause and uneven speed, resulting in the deviation between the estimated value and the actual value.

Contents of the invention

The object of the present invention is to provide a banknote identification movement position multi-optocoupler differential precise positioning mechanism and its positioning method in view of the above-mentioned deficiencies, which adopts a high-density ultra-long fine-tooth speed measuring disk, and several photocouplers are installed on the edge of the speed measuring disk , using each photocoupler assembly to generate a pulse signal, which is provided to the A/D converter of the control system as a synchronous clock signal, and then using a multi-frequency circuit to generate a high-density positioning pulse to realize real-time and precise positioning of the banknote identification movement position.

The multi-optocoupler differential precise positioning mechanism and its positioning method for banknote identification movement position are realized by adopting the following scheme: the banknote identification movement position multi-optocoupler differential precise positioning mechanism includes a tachometer disc, several photocouplers, and a pulse circuit. The speed measuring disc is installed on the side of the transmission shaft of the counting machine, and several photocouplers are installed on the edge of the speed measuring disc. The installation distance between the photocouplers constitutes a differential position relationship. The output end of the photocoupler is connected with the input end of the pulse circuit. The photocoupler is installed on the photocoupler circuit mounting bracket. The pulse circuit includes a monostable trigger, an OR circuit, and a multiplier circuit. There are several monostable triggers, the signal input terminals of which are respectively connected to the output terminals of the optocoupler, the output terminals of several monostable triggers are connected to the input terminals of the OR gate circuit, and the output terminals of the OR gate circuit are connected to the multiplier circuit The input ends are connected, and the signal output end of the multiplier circuit provides a real-time sampling clock signal to the A/D converter of the control system through the signal line.

Photocoupler installation spacing = n.t+t/x, where n is the number of tachometer teeth between photocouplers, t is the distance between tachometer teeth, and x is the number of photocouplers.

The positioning method of the banknote identification movement position multi-optocoupler differential precise positioning mechanism: when the speed measuring disc installed on the transmission shaft is running, the rotating wheel installed on the transmission shaft drives the banknotes or paper bills forward, and the advancing amount is the same as that on the speed measuring disc. Corresponding to the tooth pitch, a number of photocouplers installed on the edge of the speed measuring disc simultaneously generate the number of pulses corresponding to the advancing amount of banknotes. Since the photocoupler installation spacing is a differential position relationship, the photoelectric coupler installation spacing = n.t +t/x, where n is the number of tachometer teeth across the photocoupler, t is the distance between the tachometer teeth, and x is the number of photocouplers. The pulse gap generated by several photocouplers corresponds to the tooth width, so that the pulses generated by several photocouplers conform to the differential relationship, and the pulse signals generated by several photocouplers are respectively sent to the monostable trigger for After the leading edge is extracted, the signal is superimposed by the OR gate circuit, and combined into a clock signal with a continuous 50% duty cycle, and then sent to the multi-frequency circuit for frequency multiplication processing and then output, which is provided for real-time sampling by the A/D converter of the control system. The clock signal further refines the measurement of the advancing amount of banknotes or paper notes, so that the control system can obtain accurate real-time precise positioning reference signals, which are used to control the detection sensor to accurately position the moving banknotes or paper notes.

The multi-optocoupler differential precise positioning mechanism and positioning method for banknote identification have reasonable design, simple structure, closed-loop measurement, strong real-time performance, high resolution, high positioning accuracy, and can overcome measurement errors caused by changes in the moving speed of the measured medium. It provides a good reference signal for various banknote identification methods.

Description of drawings

The present invention will be further described below in conjunction with the accompanying drawings.

Fig. 1 is a schematic diagram of a multi-optocoupler differential precise positioning mechanism for banknote identification movement positions.

Fig. 2 is an electronic principle block diagram of a multi-optocoupler differential precise positioning mechanism for banknote identification movement positions.

Fig. 3 is a schematic diagram of the pulse signal of the multi-optocoupler differential precise positioning mechanism for the banknote identification movement position.

Detailed ways

Referring to accompanying drawings 1 to 3, the banknote identification movement position multi-optocoupler differential precise positioning mechanism and the positioning method mechanism include a tachometer 1, several photocouplers 3, and a pulse circuit 4. The speed measuring disc 1 is installed on one side of the transmission shaft of the counting machine, and several photocouplers 3 are installed on the edge of the speed measuring disc 1, and the installation distance between the optocouplers 3 constitutes a differential position relationship. The output end of the photocoupler 3 is connected with the input end of the pulse circuit 4 . The photocoupler 3 is installed on the photocoupler circuit mounting bracket 5 . The pulse circuit 4 includes a monostable trigger, an OR circuit, and a multiplier circuit. There are several monostable triggers, the signal input terminals of which are respectively connected to the output terminals of the optocoupler, the output terminals of several monostable triggers are connected to the input terminals of the OR gate circuit, and the output terminals of the OR gate circuit are connected to the multiplier circuit The input ends are connected, and the signal output end of the multiplier circuit provides a real-time sampling clock signal to the A/D converter of the control system through the signal line.

The tachometer disc 1 is a high-density fine-toothed disc, and the shape teeth of the tachometer disc tooth 2 are ultra-long fine teeth, and the number of teeth is 140-200 teeth.

Photocoupler installation spacing = n.t+t/x, where n is the number of tachometer teeth across the photocoupler, the size of n depends on the size of the photocoupler, n is 10 to 50, and t is the tachometer tooth The spacing, t is 0.5~2mm, x is the number of photocouplers, and x is 2~6.

Photocoupler 3 adopts SG-215 photocoupler. The monostable trigger adopts HC122 integrated chip. The OR gate circuit can be composed of a number of 1N4148 diodes and resistors connected to form an OR gate circuit, and the number of diodes is the same as that of the photocoupler. The OR gate circuit can also use an OR gate chip. The multiplier circuit adopts HC74 integrated chip and so on.

The positioning method of the multi-optocoupler differential precise positioning mechanism for the banknote identification movement position: when the speed measuring disc installed on the main shaft is running, the friction wheel installed on the main shaft drives the banknote or paper bill to advance, and the advancing amount is the same as that on the speed measuring disc 1 The tooth pitches of the tachometer discs 2 correspond to each other. Several photocouplers 3 installed on the edge of the tachometer disc 1 simultaneously generate the number of pulses corresponding to the advance amount of banknotes. Since the photocoupler installation spacing is in a differential positional relationship, the optocoupler Installation spacing = n.t+t/x, where n is the number of tachometer teeth across the photocoupler, the size of n depends on the size of the photocoupler, n is 10 to 50, t is the distance between the tachometer teeth, t is 0.5~2mm, x is the number of photocouplers, and x is 2~6. The pulse gap generated by several photocouplers corresponds to the tooth width, so that the pulses generated by several photocouplers conform to the differential relationship, and the pulse signals generated by several photocouplers are respectively sent to the monostable trigger for After the leading edge is extracted, the signal is superimposed by the OR gate circuit, and combined into a clock signal with a continuous 50% duty cycle, and then sent to the multi-frequency circuit for frequency multiplication processing and then output, which is provided for real-time sampling by the A/D converter of the control system. The clock signal further refines the measurement of the advancing amount of banknotes or paper notes, so that the control system can obtain accurate real-time precise positioning reference signals, which are used to control the detection sensor to accurately position the moving banknotes or paper notes. The positioning measurement resolution of the invention can reach 0.05mm-0.3mm.

Claims (5)

1, the accurate detent mechanism of a kind of paper banknote identifying movement position multiple optical coupling differential is characterized in that structure comprises tachometer disc, several photoelectrical couplers, pulsing circuit; Tachometer disc is installed in checks facility transmission shaft one side, at the tachometer disc edge several photoelectrical couplers are housed, installing space constitutes the differential position relation between the photoelectrical coupler, be described installing space=nt+t/x, wherein n crosses over the tachometer disc number of teeth between the photoelectrical coupler, t is the tachometer disc space width, x is a photoelectrical coupler quantity, photoelectric coupler output end links to each other with the pulsing circuit input end, photoelectrical coupler is installed on the photoelectricity coupled circuit mounting bracket, and pulsing circuit comprises monostalbe trigger, OR circuit, multiple frequence circuit; Monostalbe trigger is provided with several, its signal input part links to each other with photoelectric coupler output end respectively, several monostalbe trigger output terminals link to each other with the OR circuit input end, the OR circuit output terminal links to each other with the multiple frequence circuit input end, and multiple frequence circuit signal output terminal offers control system A/D converter real-time sampling clock signal by signal wire.

2, the accurate detent mechanism of paper banknote identifying movement position multiple optical coupling differential according to claim 1 is characterized in that the tachometer disc number of teeth is 140～200 teeth.

3, the localization method of the accurate detent mechanism of a kind of paper banknote identifying movement position multiple optical coupling differential, when it is characterized in that the tachometer disc running on being contained in transmission shaft, the runner drive bank note or the paper-bill that are contained on the transmission shaft advance, advance amount is corresponding with the tooth pitch on the tachometer disc, be contained in several photoelectrical couplers at tachometer disc edge, produce and the corresponding pulse number of bank note advance amount simultaneously, because the photoelectrical coupler installing space becomes the differential position relation, be described installing space=nt+t/x, wherein n crosses over the tachometer disc number of teeth between the photoelectrical coupler, t is the tachometer disc space width, x is a photoelectrical coupler quantity, the inter-train pause that several photoelectrical couplers produce is corresponding with the facewidth, meet the difference relation between the pulse that makes several photoelectrical couplers produce, the pulse signal that several photoelectrical couplers produce, flow to monostalbe trigger respectively, after carrying out the forward position extraction, carry out the signal stack through OR circuit, be merged into the clock signal of continuous 50% dutycycle simultaneously, flowing to the multiple frequence circuit again carries out exporting after the process of frequency multiplication, clock signal is provided for control system A/D converter real-time sampling, further the advance amount of bank note or paper-bill is measured in refinement, thereby make control system obtain accurate accurate positioning reference signal in real time, be used for the control detection sensor bank note or the paper-bill of motion are accurately located.

4, the localization method of the accurate detent mechanism of paper banknote identifying movement position multiple optical coupling differential according to claim 3, it is characterized in that photoelectrical coupler installing space=nt+t/x, wherein n crosses over the tachometer disc number of teeth between the photoelectrical coupler, n is 10～50, t is the tachometer disc space width, t is 0.5～2mm, and x is a photoelectrical coupler quantity, and x is 2～6.

5, the localization method of the accurate detent mechanism of paper banknote identifying movement position multiple optical coupling differential according to claim 3 is characterized in that the location survey resolution reaches 0.05mm～0.3mm.

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