Application development of technology of electron of power source module

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  • source:GERMAN CNC Machining
Power source module uses a system to offer + 5V dc stabilizes voltage. Place when the object that be measured go up in scale when, the pressure of the object passes bridge-type to press quick resistor sensor, right now because sensor gets power not all and generation deformation, resistor block value is changed subsequently, bring about bridge unbalance output and the weight of the object that be measured to become the imitate voltage signal of direct ratio, the digital signal that chip HX711 changes to be changed into high accuracy via A/D after signal of this imitate voltage magnifies, send sheet piece machine undertake store and be handlinged. When clavier module has key-press to press, odd piece the opportunity undertakes necessary judgement and analysis, and the function according to this key-press, undertake flay, weigh heavy, consideration, show, inquiry, call the police the implementation that waits for corresponding function. Each module that the hardware circuit of electronic balance differs by the function are comprised, each module are designed independently and detect, final combination keeps abreast of into a whole travel function checks. Consider requirement of many sided of the price, function, on information control and processing module, used STC15W408S sheet piece machine, designing STC15W408S to implementation is measured and can control a demand not only, on function, its weight light, bulk small, power comsumption is low, raised the portable sex of electronic balance. Odd the P1 of a machine STC15W408S.

0, P1.

1 port is used at changing join of the SCK of chip HX711 pin, DOUT with high accuracy A/D, receive digital signal; P1.

5 port are used at calling the police to hint, be linked together with buzzer circuit; P0 port is used at transmitting signal with liquid crystal LCD1602. Weighing heavy sensor is one kind can feel pressure and the pressure that feels signal is changed into with be measured the sensor that object weight proportionate can use at outputting signal, the key that regards an electron as the balance forms one of parts, the option that weighs heavy sensor is very important, of its function good with bad, decided electronic balance measures the dependability of data and accuracy on great rate. To realize the high accuracy that electronic balance designs, tall stability asks, in saying numerously to weigh sensor, this products plan chose BF350 to say to weigh sensor, its strain gauge factor is 2.

00-2.

20, accuracy class is 0.

02 class, limit of meet an emergency is 2.

0% , and power comsumption is low, come loose easily stickup and hot, simple, solder convenient, can remove the effect that temperature change and tiny wave motion bring, the static state that realizes tall stability is measured. To achieve the high accuracy of this design and tall stability demand, the system is used piece inside of the circuit such as oscillator of compositive regulated power supply, clock tall compositive HX711 of degree of core of 24 A/D changeover, its process designing is simple, answer speed fast, when using need not outside receive component, have electrify automatic restoration function. The imitate voltage signal that calls heavy sensor output passes choice A or B passageway transmits HX711, among them of A passageway but process designing gain is 128 or 64, b passageway is fixed 32 gain. The sheet of HX711 and back end piece machine interface circuit is simple, need DOUT, SCK to receive sheet only piece on the I/O mouth of machine, can undertake signal is transmitted. CNC Milling