BW SENSING BWM400 Manuale utente

BWM400

9KXOGRY

Digital Dual-Axis Inclinometer

Technical Manual

inclinometer which output mode is RS485 and TTL optional. It adopts the latest technology MEMS

manufacturing process tilting unit, with small size, low power consumption, high consistency

and stability. Because it is a digital inclinometer, the linearity is more easily corrected. The

operating temperature reaches the industrial grade -40 ° C ~ +85 ° C.

When multi-section cascading is used, we provide a multi-section slanting algorithm, which can

accurately measure the displacement of large length and deep depth, and provides an automatic

calibration algorithm.

●Foundation pit monitoring

●Soil monitoring

●Dam tailings monitoring

●Exploration well monitoring

●Slope monitoring

●High-speed rail monitoring

●Piling monitoring

●Deep displacement

BWM 400

Digital Dual-Axis Inclinometer

Introduction

●Dual-axis inclination measurement

●Measuring range: ± 60°

●Accuracy: 0.005°

●Voltage input: 9~35V(DC)

●Output mode: RS485/TTL optional

Features

●Multi-section cascade

●Operating temperature: -40℃~+85℃

●High vibration resistance>2000g

●Resolution: 0.001°

●Volume: 1m cylindrical long measuring

oblique section, diameter 28.1mm

Applications

BEWIS SENSING TECHNOLOGY LLC

www.bwsensing.com Tel: +86 510 8573 7158

BWM 400

Digital Dual-Axis Inclinometer

Specifications

Electrical Specifications

Parameters

Power supply

Operating current

Operating

temperature

Store temperature

Min

-40

-55

Typical

Max

+85

+100

Units

℃

Conditions

Non-loaded

2000g,0.5ms,3times/axis

Conditions

Indoor

-40～85℃

25℃

BWM400-5

±5

X-Y

0.005

0.001

±0.001

0.005

100

BWM400-30

±30

X-Y

0.01

0.001

±0.001

0.01

100

according to GBT17626

≥100 MΩ

≥90000 hours/time

BWM400-60

±60

X-Y

0.05

0.001

±0.001

0.05

100

°/℃

Units

Performance Specifications

Measuring range

Measuring axis

Accuracy

Resolution

Frequency response

Electromagnetic

compatibility

Insulation resistance

Shock resistance

Zero temperature

drift

MTBF

Cross axis error

Parameters

Resolution: The measured minimum change value that the sensor can detect and resolve within

the measurement range.

Accuracy: The error between the actual angle and the Root mean square(RMS) of the measured

angle of the sensor (≥16 times).

BEWIS SENSING TECHNOLOGY LLC

www.bwsensing.com Tel: +86 510 8573 7158

RED

VCC

DC 9-35V

BLUE

BLACK

GND

GREEN

485-

YELLOW

485+

RED VCC DC 9-35V

YELLOW TX

TTL wiring diagram

GND

GREEN RX

RED VCC DC 9-35V

YELLOW D+ 485+

485-

GND

Signal

acquisition

end

GREEN D-

BWM 400

Digital Dual-Axis Inclinometer

无锡北微传感科技有限公司 www.bwsensing.com Tel: +86 510 8573 7158

Electrical connectionss

Cable color

Function

Electrical interfaces

Inclinometer

Signal

acquisition

end

BLACK GND

RS485 wiring diagram

BLACK GND

BEWIS SENSING TECHNOLOGY LLC

www.bwsensing.com Tel: +86 510 8573 7158

BWM 400

Digital Dual-Axis Inclinometer

Debug software

①

②

③

Correctly connect the inclinometer serial port hardware and connect the power supply.

Select the computer serial port and baud rate and click connect Serial Port.

Click Start and the tilt angle of the tilter in the X direction and Y-direction will be

displayed on the screen.

Users can directly download serial assistant on official website (Supports-Download). You can also use

more convenient and intuitive PC software.

BWS4000 supporting serial debugging software can be connected to the inclinometer on the

computer for angle display. The software debugging interface is as shown in the figure below. Using

the debug software, it can conveniently display the current X-direction and Y-direction tilt angle, and

you can also modify and set other parameters by yourself.

Software use steps:

Note: You can switch to Chinese or English version by the bottom left button.

BEWIS SENSING TECHNOLOGY LLC

www.bwsensing.com Tel: +86 510 8573 7158

BWM 400

Digital Dual-Axis Inclinometer

2.2 Read angle of Y axis Command：77 04 00 02 06

(Nbyte)

Protocol

1Data Frame Format：

Data Format: Hexadecimal(The following command interprets Table 0X as a hexadecimal identifier.

You do not need to enter 0X, such as 0x77, you only need to enter 77.)

Identifier: Fixed to 77

Frame Length: Length from Frame Length to Checksum（included）

Address Code: Address of acquiring module, default 0x00

Data: Content and length variable according to Command

Checksum: Sum of Frame Length, Address Code, Command and Data. (Please pay attention that

when the command or data changes, the checksum will change. )

（8 data bits，1 stop bit，No parity check，default baud rate 9600）

Identifier

(1byte)

0x77

Frame Length

（1byte）

Address Code

（4byte） Command

（1byte） Data Checksum

（1byte）

2 Command Format

2.1 Read angle of X axis Command：77 04 00 01 05

0x77 0x01

Command response：

0x77 0x81 SXXX.YYY0

Identifier

（1byte Frame Length

（1byte）

Address Code

（4byte）

Command

（1byte）

Data

（0byte） Checksum

（1byte）

Identifier

（1byte Frame Length

（1byte）

Address Code

（4byte） Command

（1byte）

Data

（4byte） Checksum

（1byte）

0x77 0x02

Command response：

0x77 0x82 SXXX.YYY0

Identifier

（1byte Frame Length

（1byte）

Address Code

（4byte） Command

（1byte）

Data

（0byte）

Checksum

（1byte）

Identifier

（1byte

Frame Length

（1byte）

Address Code

（4byte） Command

（1byte）

Data

（4byte） Checksum

（1byte）

Note: The data field is a 4-byte return angle value, which is a compressed BCD code. S is the sign bit (0 means

positive, 1 means negative), XXX is the three digit integer part, YYY is the fractional part. The Data of other axis is

the same format. For example, 10 26 80 means -026.80 °.

BEWIS SENSING TECHNOLOGY LLC

www.bwsensing.com Tel: +86 510 8573 7158

Note: The data field is a 16-byte return angle value divided into three groups of four compressed BCD codes.

They are the X-axis angle, the Y-axis angle, and the temperature. Each axis data format SXXX.YYY0, S is a sign bit

(0 positive, 1 negative) XXX is a three-digit integer value, YYY is a three-digit decimal value. The other axis data is

the same. For example, 10 26 87 60 means -026.8760°.

Such as: 77 13 00 00 00 00 84 10 09 15 50 00 07 54 10 00 23 08 40 EB

Where 10 09 15 50 represents the X-axis angle of -9.155°, and 00 07 54 10 represents the Y-axis angle of 7.541°.

BWM 400

Digital Dual-Axis Inclinometer

2.3 Read angle of X,Y axis Command：77 04 00 04 08

0x77 0x04

Command response：

0x77 0x84

Identifier

（1byte Frame Length

（1byte）

Address Code

（4byte） Command

（1byte）

Data

（0byte） Checksum

（1byte）

Identifier

（1byte Frame Length

（1byte）

Address Code

（4byte） Command

（1byte）

Data

（12byte） Checksum

（1byte）

2.4 Set absolute/relative zero point Command：77 08 00 00 00 00 05 01 0E

Command response：

0x77 0x85 0x00: success

0xFF: failure

0x77 0x05

0x00: absolute zero

0x01: relative zero

Identifier

（1byte

Frame Length

（1byte） Address Code

（4byte） Command

（1byte）

Data

（1byte）

Checksum

（1byte）

Identifier

（1byte

Frame Length

（1byte）

Address Code

（4byte） Command

（1byte）

Data

（1byte）

Checksum

（1byte）

0x77

Command response：

2.5 Query relative / absolute zero Command：77 07 00 00 00 00 0D 14

0x0D

Identifier

（1byte

Frame Length

（1byte） Address Code

（4byte） Command

（1byte）

Data

（0byte）

Checksum

（1byte）

0x77 0x8D

0x00: absolute zero

0xFF: relative zero

Identifier

（1byte

Frame Length

（1byte） Address Code

（4byte） Command

（1byte）

Data

（1byte）

Checksum

（1byte）

Note: This command refers to whether the zero point reference used in the current state is relative zero or

absolute zero.

Note: absolute zero：Based on the factory-calibrated zero point.

relative zero: Reference to the zero after the current installation.

BEWIS SENSING TECHNOLOGY LLC

www.bwsensing.com Tel: +86 510 8573 7158

Note: Set to answer mode, it must receive the read angle command to output the angle. When set to automatic

output system, it will automatically output X, Y axis angle and temperature after power-on. After setting, you need

to send save command (77 07 00 00 00 00 0A 11).

For example: set automatic output 5Hz transmission: 77 08 00 00 00 00 0C 01 15, return: 77 08 00 00 00 00 8C 00 94.

BWM 400

Digital Dual-Axis Inclinometer

2.6 Set output mode Command：77 08 00 00 00 00 0C 00 14

0x77 0x0C

0x00: question and answer Mode

0x01: 5Hz Data Rate

0x02: 10Hz Data Rate

0x03: 20Hz Data Rate

0x04: 25Hz Data Rate

0x05: 50Hz Data Rate

0x06: 100Hz Data Rate

0x77 0x8C 0x00: success

0xFF: failure

0x05

（1byte

Frame Length

（1byte）

Address Code

（4byte）

Command

（1byte） Data

（0byte） Checksum

（1byte）

Identifier

（1byte

Frame Length

（1byte）

Address Code

（4byte） Command

（1byte）

Data

（1byte） Checksum

（1byte）

Note: The default output mode is 00. When setting the 100Hz output frequencies, you need to adjust the baud

rate to 115200.

Command response：

0x05

0x77

Command response：

2.7 Set baud rate Command： 77 08 00 00 00 00 0B 00 13

0x0B

Note：For data, 00: 2400, 01: 4800, 02: 9600, 03: 19200，04: 115200，Default 02:9600.

0x77 0x8B 0x00: success

0xFF: failure

Identifier

（1byte Frame Length

（1byte）

Address Code

（4byte） Command

（1byte）

Data

（1byte）

Checksum

（1byte）

Identifier

（1byte

Frame Length

（1byte） Address Code

（4byte） Command

（1byte）

Data

（1byte）

Checksum

（1byte）

00:2400

01:4800

02:9600

03:19200

BEWIS SENSING TECHNOLOGY LLC

www.bwsensing.com Tel: +86 510 8573 7158

BWM 400

Digital Dual-Axis Inclinometer

0x77

Command response：

2.8 Set address Command: 77 0B 00 00 00 00 0F 12 34 56 78 2E

0x0F

0x77 0x8F 0x00: success

0xFF: failure

XXXX

Module

address

Identifier

(1byte)

Frame Length

（1byte） Address Code

（4byte）

Command

（1byte） Data

（4byte）

Checksum

（1byte）

Identifier

(1byte)

Frame Length

（1byte）

Address Code

（4byte）

Command

（1byte） Data

（1byte）

Checksum

（1byte）

Command response：

2.9 Save setting Command：77 07 00 00 00 00 0A 11

0x77

Note: If Save setting command is not executed, all setting will be invalid after power off.

0x00: success

0xFF: failure

0x77 0x0A

0x8A

Identifier

（1byte Frame Length

（1byte）

Address Code

（4byte） Command

（1byte）

Data

（0byte） Checksum

（1byte）

Identifier

（1byte

Frame Length

（1byte）

Address Code

（4byte） Command

（1byte）

Data

（1byte）

Checksum

（1byte）

Command response：77 0B 12 34 56 78 1F 12 34 56 78 52

0x1F

0x77 0x1F

2.10 Query address Command：77 07 00 00 00 00 1F 26

Identifier

(1byte)

Frame Length

（1byte）

Address Code

（4byte） Command

（1byte）

Data

（0byte） Checksum

（1byte）

Identifier

(1byte)Frame Length

（1byte）

Address Code

（4byte） Command

（1byte）

Data

（4byte） Checksum

（1byte）

0x07

0x77

BEWIS SENSING TECHNOLOGY LLC

www.bwsensing.com Tel: +86 510 8573 7158

BWM 400

Digital Dual-Axis Inclinometer

BEWIS SENSING TECHNOLOGY LLC

www.bwsensing.com Tel: +86 510 8573 7158

Ordering Information

Executive standard

●Enterprise Quality System Standard: ISO9001:2008 Standard (Certificate No.:10114Q16846ROS)

●CE certification (certificate number: 3854210814)

●ROHS (certificate number: SO81426003)

●GB/T 191 SJ 20873-2003 General specifications for tiltmeters and spirit levels

●GBT 18459-2001 sensor main static performance index calculation method

●JF 1059-1999 Evaluation and Expression of Measurement Uncertainty

●GBT 14412-2005 mechanical vibration and shock mechanical installation of accelerometer

●General requirements for GJB 450A-2004 equipment reliability

●Quality control of key parts and important parts of GJB 909A

●GJB 899 Reliability Qualification and Acceptance Test

●GJB 150-3A high temperature test

●GJB 150-4A low temperature test

●GJB 150-8A rain test

●GJB 150-12A dust test

●GJB 150-16A vibration test

●GJB 150-18A impact test

●GJB 150-23A Tilt and Swing Test

●GB/T 17626-3A RF electromagnetic radiation immunity test

●GB/T 17626-5A surge (hit) impulse immunity test

●GB/T 17626-8A power frequency magnetic field immunity test

●GB/T 17626-11A voltage dips, short interruptions and voltage changes immunity

Product number Way of communication Package condition

Oblique section

RS485

BWM400-60-485

BWM460-60-TTL TTL

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