TY-SLYSeries microcomputer automatic particle counter

Brand: Tengyuyi
model:TY-SLY
1、 Application of microcomputer automatic particle counter

The microcomputer automatic counting instrument can automatically count various granular objects according to the user's set values ，In agriculture, it is mainly used for counting grains in grain crops，Automatic counting of grains such as rice, wheat, sorghum, corn, vegetable seeds, etc，When reaching the user set value，The instrument automatically stops working. Microcomputer automatic grain counter at the Academy of Agricultural Sciences（place）Agricultural colleges and universities, seed systems，The inspection of seed indicators, measurement of thousand grain weight, germination counting, and sowing counting are widely used in the grain sector，The accurate automatic counting function takes on the tedious task of manually counting grains ，Provide convenience for users.

2、 The working principle of the instrument

The operation of the instrument is controlled by a microcomputer chip，Equipped with thin-film button operation. Electromagnetic vibration box enables seeds to be queued and fed one by one，After falling into the photoelectric conversion slot, photoelectric pulsation is formed，After amplification, shaping, and inversion, it is sent to the counting circuit，use LED The digital display shows the reading. Pre set count values using the operation settings and directional keys，After counting to the preset number，Stop feeding，Stop counting. The instrument is equipped with a self calibration frequency，Easy to check the correctness of the counting circuit and preset settings.

（1） Electromagnetic vibration feeding device：The seeds are placed on the tray，The material trough is spiral shaped.

（2） Seeds rising in the spiral groove，Arriving at the material discharge port and falling down，Generate current changes by projecting onto a silicon photovoltaic cell through the photoelectric conversion area ，Meridian pulsation Magnify and shape to obtain photoelectric counting pulsation，Input into the microcomputer controlled counting display circuit.

（3 ） The counting display circuit adopts a microcomputer chip AT89S52Total control（Atmel company），Adopting a time-sharing scanning method. Counting signal communication Enter through external interrupt port AT89S52，exist AT89S52Complete the accumulation and five digit numerical processing in the middle，Each digital tube should display data stored in AT89S52 The memory space，causeAT89S52 Control digital tube position selection signal 74LS138 Select the position of the digital tube，After making the selection. cause AT89S52 Read and convert to numerical value, then encode it into a digital tube and pass it through the serial output port TXD Deliver to string in and out 8 Displacement register 74LS164 centre，8 Displacement driven common negative electrode LED LED display，Five digit LED Input end connected in series with current limiting resistor，Make the stroke brightness uniform.

（4） The control signal for the preset self stop circuit is also provided by AT89S52control，When the preset number matches the counting number，Relay release，Stop feeding， close AT89S52external interrupt，Thereby cutting off the counting input，LED Display preset numbers.

（5） Preset and view circuits，press down“set up”key，Switch the digital display to the setting environment，pass through“Up, down, left, right”Four directions Directional key（“Up and down”It refers to the addition and subtraction of numerical values“Left, right”It refers to the movement of the position of the set value）Set preset values，After setting up，press down“Reset key”，Exit the setting state，Digital tube display 00000If users want to view preset values，press down“view”Just press the key，The viewing function will automatically return to the user's previous digital display.3 Seconds exit to view status，Digital tube display 00000.

3、 Instrument configuration and structure