2018-05-19Project review

1 .product introduced

A. Function requirement (customer)

The product function is control the 1KW and 2KW Loading ,It's based on PIC micr-chip .used in industrial heaters.products need sample and realiable.Themodularizeddistributecontrol technique,power  supply,mechanicalshell,hardware,software,networkdebugdiagnosisandsafetydesign of the system characteristic have beendescribed.

B. Parameter requirement (Balance)

   1 MCU： use pic  for Low-cost

   2 reliability： 200000  times test

   3 power：220-240V  AC 50HZ  

   4 CC ， ROHS，EMI/C  Certificate  

C. Feasibility analysis

     EE: ok

     ME: ok   packaging and  mechanical shell 

     Cost analysis: ok    swtich  is key

     Software：ok  

     other：In addition to the special requirements, it is necessary to meet the requirements for the assembly of the manufacturing circuit board. For details, please refer to the floor technology standard.

2. Circuit  designed

AAppropriateprograms

B Simulations 

    Just software debug.

C sch and demo

3 Fireware

a Structure diagram

b Flow diagram

c coding  

4 PCB Layout

a Bom : ok

b Layot: ok

c EMI/C : ok

5 DFMEA

A. Functional specifications

 Engineer characteristic ok

 Function ok

B. Appearance  specifications

   packaging test  ok

   Software test ok

   reliability test ok

   panting Gerber check  ok

C.Control characteristics

   CPK test  5%

   QC Check   Pass

D. Safety requirements

    Defend jig

   General design

   W I   Work instruction

6 Mass  production

   we find 5 pcs NG samples： fireware can't record

A Test device

  Add a temperature control system in test device. 

B CPK   ok