Currently for digital truck scale,the loadcell is connected to indicator is by RS422/RS485 interface.Each sensor should have a separate address code.There are many shortcomings by the invention of the intelligent terminal data parallel transmission method and apparatus.The connecting wire between indicator and sensors is changed to general line.The junction box will be changed to main control device and indicator to control terminal.It is to overcome all the problems of the original system.There is no possibility of miscalculation may improve the collecting efficiency.Making dynamic digital scale become possible and realize the simplest type to install and maintenance digit truck scale.

1.The control device is the core of system.It collects al loadcell data and then send to indicator.At the same time,it receives the controlling order and finishes the work.The device is installed in the scale to shorten the loadcell connecting cable.It can decrease the external interference

（In nowadays,the junction is small because of the micosoft technolog.The reliability was so high that the humidity had no effect on it)

The distance is far between indicator and scale body. If connecting the wire is vulnerable to lightning invasion. Between junction box and indicator is with electrical isolation system to ensure the scale body is not damaged.Only one can protect all sensors and improve the reliability of the system (the original display and sensor is a bus.It cannot be with electrical isolation.The entire line is exposed.Lightning can be damaged easily sensor or instrument and reduce the reliability of the system greatly.)

It is specialized wire to connect between loadcell and junction box.The junction box can realize each loadcell by the connecting signal cable.The loadcell don’t need the cade that can make each loadcell communication interface the same.No need to set and exchange each other.

Each sensor is connected with the main control device through a main line.It does not affect each other. For example,if the indicator displays 2# loadcell damaged,the worker just need replace it.The prompt and operation are very accurate and clear.

The junction box collects each loadcell data and improves the picking rate.It fits truck scale to use.No matter how many loadcell,the rate can be 50times/s under low baund rate.

The junction box completes all operations of serial communication by using the software.As for lack of standard serial port hardware limitations,it can set the encryption algorithm and communication procedures.The standard hardware serial port can not be cracked.It is to ensure the safety and interests of the manufacturers.