Engineering monitoring multi-channel vibrating wire sensor wireless acquisition instrument external digital sensor process

 

1. Data access logic of digital sensor

VS Device support in RS485 The interface is externally connected with a digital sensor , Single type 、 Multi type digital sensor access .

Single type digital sensor ： Using registers DS_SENSOR(282) To set the type and number of single type digital sensors （ See the table below ）. VS It will automatically send sensor reading instructions , When VS After receiving the data output by the sensor, parse the data and update it to the channel register CHxx Inside , Finally, it is sent to the remote server .

Multiple types of digital sensors ： Using registers MDS_EN(290) To set the number of types of multi type sensors , Set to 0 When, it means that the multi type digital sensor function is turned off . Using registers MDS01~08(291~298) To set the type code and quantity of each type separately （ See the table below ）. When MDS_EN The value of high byte is 0 when , The read sensor data will be saved in CHxx Register , After all sensors are read, they are sent to the remote server . And when MDS_EN The high byte of is 1 It will be sent to... Independently after reading each sensor TCP The server .

 

With VS The firmware version of the device is constantly updated , The types of digital sensors supported will also continue to increase .

2. Digital sensor start channel assignment

register DS_CHNUM(299) It is used to set which channel the read digital sensor data starts to occupy , The default is 1. The number of channels occupied by a single digital sensor depends on the specific sensor type , for example ： Each laser rangefinder will occupy 1 Channels , Each biaxial tilt sensor will occupy 2 Channels , The three-axis accelerometer will occupy 3 Channels . VSxxx According to the type and number of sensors DS_CHNUM The specified channel starts allocating channel registers in turn CHxx.

for example ： DS_CHNUM=17;DS_SENSOR=0x0203;MDS_EN=0x0002;MDS01=0x0302;MDS02=0x0C03; Indicates that the data of the digital sensor is from CH17 Start occupying , A single type digital sensor laser rangefinder is connected externally 3 individual + Multiple types of digital sensors 2 class （ The first 1 Class is biaxial inclinometer 2 individual , The first 2 Class is static level 3 individual ）, common 8 Digital sensors , Then the channel allocation is shown in the following table .

 

3. Multi type digital sensor independent transmission protocol

When sending sensor data independently , Each sensor is a separate packet , Send to the preset TCP The server . Packet string , The structure is as follows ：

UDID>MDS+ Sensor type code + The first x A sensor > The first x package / total x package > Sensor data , Checksum character , Carriage return line feed, such as ：“861234567812345>MDS0B03>1/1>1234DF\r\n”

861234567812345：VS Unique equipment identification code MDS： Fixed string , Indicates that the data in this package is multi type digital sensor data sent independently 0B：16 Base number 0x0B, namely 10 It's binary 11, Indicates that the type of this sensor is 11（ Gold code displacement sensor ）.03：16 Base number 0x03, Indicates that this packet of data is the... Of this type of sensor 3 A sensor .1/1： Indicates that this sensor has only 1 Packet data , This is the first 1 package .1234： The value of the sensor ,16 Base string , Corresponding 10 Into the system for 4660, For this sensor , Express 4660mm.DF： The sum check value of all the previous bytes .

\r\n： Carriage return line feed symbol

Be careful ： Sensor type code 、 Number 、 Sensor data , It's all 16 Base string , Every two characters represent 1 Bytes , The data in the above example 1234 Express 0x12 and 0x34.