High Precision Navigation Stable Control 2 Axis Mems Gyro

Stable Control MEMS IMU

ER-MIMU-103
1. Small size: 47×44×14mm;
2. Light weight: 40g;
3. Gyro bias instability: 0.1 º/h (Allan variance).

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Introduction

ER-MIMU-103 Stable Control MEMS IMU

Introduction

ER-MIMU-103 is a complete inertial measurement unit with a built-in 3-axis gyroscope, a 3-axis accelerometer, a 3-axis magnetometer, and a pressure sensor. Each inertial sensor combines industry-leading MEMS technology with signal conditioning to deliver optimized dynamic performance. Each sensor has its own dynamic compensation formula that provides accurate sensor measurements.

ER-MIMU-103 provides a simple and efficient way to integrate accurate multi-axis inertial sensing into industrial systems compared to complex and expensive discrete design solutions. All required motion testing and calibration are part of the factory production process, significantly reducing system integration time. The SPI and register structures provide a simple interface for data collection and configuration control. It is available in a module package measuring approximately 47 mm x 44 mm x 14 mm with a standard connector interface.

Features

Three-axis MEMS gyroscope:

Dynamic measurement range: ±400º/s;

Bias instability: 0.1 º/h (Allan variance);

Angle random walk: 0.05º/√h.

Three-axis MEMS accelerometer:

Dynamic measurement range:±30g;

Bias instability: 20ug (Allan variance);

Ensure accuracy over the full temperature range (-40°C~80°C): Built-in high-performance temperature calibration and compensation algorithm;

Communication interface: 1 SPI

Application

Drone heading, pitch, roll measurements

Control and orientation in robots and driverless vehicles

Guidance, navigation and control in tactical MEMS system

Stabilizing and pointing in the satellite dish, target tracking system

High-speed rail track monitoring and maintenance

Ship attitude measurement and maintenance, channel detection and maintenance

Forests, land monitoring, etc

Specifications

Parameter	Test condition	A	B	C	Unit
Gyroscope
Measuring range		±400	±400	±400	º/s
Bias instability	Allan variance	＜0.3	＜0.3	＜0.1	º/h
Bias stability	10s,1δ	＜3	＜2	＜1	º/h
Bias stability	1s,1δ	＜9	＜6	＜3	º/h
Random Walk	1б	＜0.125	＜0.125	＜0.05	º/√h
Bias Repeatability	1б	＜3	＜2	＜1	º/h
Scale factor at 25°C		16000	20000	20000	LSB/º/s
Scale factor non-linearity		＜300	＜300	＜300	ppm
Bandwidth(3dB)		250	300	300	Hz
Accelerometer
Measuring range		±30			g
Bias instability	Allan variance	20			ug
Bias stability	10s smoothing,1σ	75			ug
On-off repeatability 1σ		＜50			ug
Annual repeatability		＜500			ug
Bias temperature hysteresis		＜1			mg
Scale factor non-linearity		＜3000			ppm
Factory-set scale factor		16800±17			Lsb/g (room temperature )
Bandwidth (Adjustable) 3db		200			Hz
Magnetometer
Dynamic measurement range		±2.5			Gauss
Resolution		120			uGauss
Noise Density		50			uGauss
Bandwidth		200			Hz
Barometer
Pressure range		450~1100			mbar
Overall error		6			mbar
Resolution		0.1			mbar
Absolute measurement accuracy		1.5			mbar
Long-term stability		±1			mbar/yr
Communication Interface
1 way SPI	Baud rate	＜15			MHz
Electrical specification
Voltage		6~12			V
Power dissipation		2			W
Structural characteristics
Dimension	47×44×14mm
Weight		40			g
Operating environment
Operating temperature		-40~80			℃
Storage temperature		-45~85			℃

Dimension

Dimension Of Low Cost Inertial Measurement Unit

Product composition and working principle

The products are mainly composed of three-axis MEMS accelerometer, gyroscope, three-axis magnetic sensor and barometric pressure sensor. Its working principle is as follows: the ARM microcontroller is used to collect gyroscope, accelerometer, magnetometer and barometer data, of which three high-precision gyroscopes are collected with one digital interface SPI, and three accelerometers are collected with another one digital interface SPI. All sensors are acquired and calibrated and compensated in the software.

Product technical characteristics

a)The product is designed for miniaturization and low power consumption;

b)Products with wide voltage design.

Electrical interface

The MIMU inertial measurement unit uses MW12-03-G-D-130-112 output externally, and the mating connector is Samtec CLM-112-02-L-D. The electrical pin definitions are shown in Table 1.Table 1 Pin definition of MIMU high precision inertial measurement unit

Pin serial number	name	type	description
10，11，12	VDD	power supply
13，14，15	GND	Power Ground
7	DIO1	I/O	Generic I/O, configurable
9	DIO2	I/O
1	DIO3	I/O
2	DIO4	I/O
3	SPI-CLK	input	The SPI defaults to slave mode
4	SPI-MISO	output
5	SPI-MOSI	input
6	SPI-CS	input
8	RST	input	reposition
16~24	NC	spare	Manufacturer reserved

Communication protocol

Data output protocol

R/W	PAGE_ID	address	default	Register description
R/W	0x00	0x00	0x00	Page identifier
R	0x00	0x0E	N/A	temperature
R	0x00	0x10	N/A	x axis gyroscope output, low word
R	0x00	0x12	N/A	x axis gyroscope output,high word
R	0x00	0x14	N/A	y axis gyroscope output, low word
R	0x00	0x16	N/A	y axis gyroscope output,high word
R	0x00	0x18	N/A	z axis gyroscope output, low word
R	0x00	0x1A	N/A	z axis gyroscope output,high word
R	0x00	0x1C	N/A	x axis accelerometer output, low word
R	0x00	0x1E	N/A	x axis accelerometer output,high word
R	0x00	0x20	N/A	y axis accelerometer output, low word
R	0x00	0x22	N/A	y axis accelerometer output,high word
R	0x00	0x24	N/A	z axis accelerometer output, low word
R	0x00	0x26	N/A	z axis accelerometer output,high word
R	0x00	0x28	N/A	x axis Magnetic output,high word
R	0x00	0x2A	N/A	y axis Magnetic output,high word
R	0x00	0x2C	N/A	z axis Magnetic output,high word
R	0x00	0x2E	N/A	Barometric pressure output，low word
R	0x00	0x30	N/A	Barometric pressure output，high word

Transform formulas

Current temperature =25+ TEMP_OUT* 0.00565

X axis gyroscope for example	X_GYRO_OUT	X_GYRO_LOW
	1LSB=0.02°/S	The weight of the MSB is 0.01°/s, and the weight of the successors is half that of the previous one
	0.02*X_GYRO_OUT	0.01MSB+0.005.......

YZ gyroscopes are calculated in a similar way to X-axis gyroscopes。

X axis accelerometer for example	X_ACCL_OUT	X_ACCL_LOW
	1LSB=0.8mg	The weight of the MSB is 0.4mg, and the weight of the successors is half that of the previous one
	0.8*X_ACCL_OUT	0.4MSB+0.2.......

YZ accelerometers are calculated in a similar way to X-axis accelerometers。

X x axis Magnetic	X_MAGN_OUT
	1LSB=0.1mGauss
	0.1*X_MAGN_OUT

YZ axis magnetometers are calculated in a similar way to X-axis magnetometers。

Example of barometric pressure calculation	BAROM_OUT	BAROM_LOW
	1LSB=40ubar	The MSB is weighted at 20ubar, and the successors are weighted half the weight of the previous one
	40*BAROM_OUT	20MSB+10.......

Note: For gyroscope, accelerometer, magnetic fraction high 16bit, and low 16bit, the final result of addition is calculated separately

Test interface operation description

The user installs the test interface on the computer, open xInsConnect.exe,as shown below.Click "COMCFG" to configure the baud rate, which is the COM port required; Click the "Open" button power on the IMU.

1 )Installation error description

Internal orthogonal compensation has been carried out for the whole product. If the platform used by the product cannot guarantee the accuracy of the benchmark after installation, please compensate the installation error accordingly.

2 )Installation and protection

When the product is installed, it should be tightly installed parallel to the base level of the carrier installation (the installation error with the base level should be less than 0.05°).Because the product is a precision test instrument, although there is a shell protection, in order to protect the product damage, users should handle gently. The use and movement of the product should avoid falling, and be sure not to let the product and other components in the use of serious impact, to ensure the accuracy of the product datum requirements

After sale

If there is any technical problem or failure in the use of the product, you can contact the corresponding technical personnel of our company.