Low Drift High-Performance FOG Rate Sensor with Customized MEMS Gyro Chip

Low Drift High-Performance FOG Rate Sensor with Customized MEMS Gyro Chip

PCB design:

The decoupling capacitors for pins VCP, VREF, VBUF, and VREG should be placed as close to the pins as possible, and the equivalent resistance of the traces should be minimized.  The other ends of the decoupling capacitors for VREF, VBUF, and VREG are connected to the nearest AVSS _ LN and then to signal ground via a magnetic bead.  The decoupling capacitors for VCC and VIO are also placed close to the corresponding pins. When VCC is in normal operation, the overall current will be about 35 mA, which requires a wide PCB trace to ensure voltage stability.  For smooth assembly of the device, try to avoid routing under the package.  Locate components to avoid areas of stress concentration. It is necessary to avoid large heat dissipation elements and areas with external mechanical contact, extrusion and pulling, as well as areas where positioning screws are prone to warping during overall installation.

About product

Installation

High-performance MEMS gyroscope is a high-precision test equipment. In order to achieve the best effect of design, it is recommended to consider the following aspects when installing the device on the PCB board: 1. In order to evaluate and optimize the placement of the sensor on the PCB, it is recommended to consider the following aspects and use additional tools during the design phase:  On the thermal side;  For mechanical stress: bending measurement and/or finite element simulation;  Robustness to impact: After the PCB of the target application has been soldered in the recommended manner, a drop test is performed. 2. It is recommended to maintain a reasonable distance between the mounting position of the sensor on the PCB and the key points described below (the exact value of "reasonable distance" depends on many customer-specific variables and must therefore be determined on a case-by-case basis):  It is generally recommended to keep the PCB thickness to a minimum (recommended: 1.6 ~ 2.0 mm), because the inherent stress of a thin PCB board is small;  It is not recommended to place the sensor directly under the button or close to the button because of mechanical stress;  It is not recommended to place the sensor near a very hot spot, such as a controller or graphics chip, as this can heat the PCB board and cause the temperature of the sensor to rise.

Shenzhen Fire Power Control Technology Co., Ltd. is a professional manufacturer specializing in the production of aerospace electronic products and inertial devices, and providing technical consultation and export services. The company has a strong independent  team. The technical team is composed of many outstanding experts with more than 50 years of comprehensive industry  experience. The company has strong technical strength in the fields of integrated photonics, fiber optic gyroscopes, inertial navigation, etc., and is able to provide users with professional design, development, production and services of inertial devices and related simulation software.

Technical Advantages

Firepower technology fully possesses independent design capabilities in micro nano integrated fber optic gyroscopes, silicon optical chip integrated fiber optic gyroscopes and complete inertial navigation system technologies. We have accumulated over ten years of research and development experience in the fields of optical sensing, MEMS sensing, and inertial navigation, with strong technical strength. We have mastered multiple core technologies including MEMS gyroscope and acceleration chip design, multi-core fusion technology, silicon optical chip technology, optical sensing, and inertial navigation.With the accumulation of technology, we have the ability to scale up industries and are in a leading position worldwide. Not only can we provide customers with high-performance products, but we can also significantly reduce production costs.

SILICON OPTICAL CHIP + OPTICAL FIBER SENSING UNIT

Production Capacity

Firepower has four subsidiaries with production line respectively, which are MEMS inertial product production line, fiber optic inertial production line, quartz accelerometer production line and motion simulation table production line. A total investment of 15, 000 square meters has been built for scientific research and production, including 650 square meters 10, 000-class clean rooms that meet national standards, electrical-mounting production lines and environmental testing centers.

With more than ten years development, Firepower has become a high-tech enterprise with high level of craftsmanship and comprehensive products range in China. We have complete production line from chips to finished products after all testing, providing first level products among peers in domestic and over-sea market.

Specially in 2019, we set up a micro-nano fiber optic gyroscope production line which is the only one in China, and it break through the technical bottleneck of the traditional closed-loop fiber optic gyroscope technology, bringing a new FOG of more precise, smaller and cheaper to the inertial navigation market.

The company has more than 100 patents and software copyrights, among which the core leading technologies are:

1) China′s only micro-nano fiber optic gyroscope production technology

2) Quartz flexible accelerometer pendulum design, etching, vacuum sputtering coating technology

3) Full-temperature high-precision MEMS inertial measurement and navigation technology;

4) Fiber optic gyroscope precision assembly and testing technology

5) Quartz flexible accelerometer range adjustment, scale factor, bias value, scale factor, temperature hysteresis, long-term repeatability measurement and modulation technology

6) Quartz accelerometer high temperature resistance (180° ) and high seismic design technology and process

7) Large dynamic three-axis turntable process design technology

Production Environment

We have built clean rooms, electrical assembly production line, and environmental testing center that comply with the national "Clean Building Design Specification". It has complete precision measuring instruments and testing equipment, simulation testing systems, high and  low temperature test chambers, vibration and shock test benches, precision optical indexing heads, functional centrifuges, mechanical testing rooms ,anechoic chambers, multi axis turntables and other instruments and testing equipment to ensure product quality.