Fig. 2 control logic diagram
After the study, we test the microwave tissue science, computer science, instrument science, mechanics, automatic control and other multi-disciplinary professional joint research, finally successfully developed HS-WB series high-speed on-line microwave cigarette weight control system.
2, technical features
A) the microwave detection control system according to the operating personnel need any power or power to start, and do not need preheating, no zero, may the normal work, smoke density and moisture content of the detection accuracy and reliability is not affected. (Note: Microwave density and moisture detection device and many other manufacturers have introduced due to defects, the design does not solve the electrical parameters of microwave components is easy to spot drift and affect the accuracy and reliability of detection, fundamentally requires the user to send electric start, to warm up for a long time and manual or automatic zeroing in microwave detection device. The effect of preheating long time, effective operation time schedule and factory production equipment, even that preheating long time, reach the thermal equilibrium temperature, if the design does not fundamentally solve the problem of easy shift, microwave cigarette density and moisture detection also exists the phenomenon of large error and drift. Manual or auto zero, brought trouble to the operator, but also in zero, smoke detection requirements guide tube is clean, once the smoke guiding pipe detection of tobacco shred, retention of debris, such as latex, zero but will aggravate the detection error, especially in the system of automatic zero adjustment, operation personnel because do not know when the system in zero to keep clear the smoke detecting tube retention of tobacco and other foreign bodies).
B) You can detect the density and moisture content of different brands of cigarettes without setting or changing any test parameters.
C) microwave probes emit very little power (hundreds of times less than the microwave power of ordinary mobile phones), and have no harm or impact on the surrounding personnel and the environment.
D) due to the special microwave transmitting and receiving device and special electronic circuit, the electrical parameters of microwave components to solve the scene when easy to drift and fundamentally affected by various environmental changes (such as vibration, temperature, humidity, dust) effect, in addition, a large number of the laboratory calibration test, we have to master the science the mathematical relationship between the microwave signal with the density and moisture content, we developed a microwave cigarette weight control system output signal accurately and reliably reflect the weight and moisture content, thus ensuring the cigarette weight detection and control precision.
E) due to microwave cigarette weight control system output signal not only reflects the cigarette density reflects the water, thereby eliminating the influence of tobacco caused by moisture detection device, which is the traditional detection device can not solve the problem.
F) the output signal and interface of the microwave cigarette weight control system have the same compatibility with the average weight control of the original machine and the data acquisition system.
G) microwave signals are processed by high-speed computer, so that the sampling interval of weight output signals is less than 80 microseconds, which can fully meet the speed requirements of on-line detection of various high-speed coil sets.
H) the whole inspection system has been tested and tested by high and low temperature test, vibration test and continuous electrifying test. The software and hardware are safe, stable and reliable, and it is convenient to use and maintain.
3, technical parameters
1. power supply: AC110V + 10%; 50HZ + 10%;
2. microwave transmitting power: 10mw;
3. the sampling frequency of each sampling interval time: <80 s (12500 times / sec);
4. work environment: Temperature: 0-60oC Air humidity: without condensation (<90%)
5. output signal and interface: compatible with MAID-N, MWC, SRM and other cigarette weight control system;
6. density measurement range: 0-0.6g/cm3 (cigarette density about 0.20-0.35g/cm3);
7. moisture measurement range: 0-35%;
8. Smoke pipe is cleaned with compressed air pressure: 600---1000 mbar.
Part 2 . Microwave scanning head picture
1. Passim series scanning head.(Super9 ,MK9, PASSIM8k, PASSIM7K) 
