Drone including advance means for compensating the bias of the inertial unit as a function of the temperature
First Claim
1. A drone, comprising a main circuit board (24) on which are mounted electronic components as well as an inertial unit, IMU, (26) comprising gyrometer sensors for measuring the instantaneous rotations of the drone in an absolute reference system, and/or accelerometer sensors for measuring accelerations of the drone in this reference system, the IMU (26) including an internal temperature sensor (34) delivering a chip temperature signal (θ
- °
chip),characterized in that it comprises;
a heating component (28) mounted on the circuit board (24) near the IMU (26);
a thermal guide (30) incorporated to the circuit board (24), this thermal guide extending between the heating component (28) and the IMU (26) so as to allow a transfer (32) to the IMU of the heat produced by the heating component; and
a thermal regulation circuit (44-62), receiving as an input the chip temperature signal (θ
°
chip) and a predetermined set-point temperature signal (θ
°
ref), and outputting a heating component piloting signal (TH_PWM), so as to control the heat supply to the IMU as a function of the difference between chip temperature and set-point temperature.
1 Assignment
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Accused Products
Abstract
The inertial unit, IMU, of the drone is mounted on a main circuit board. The IMU (26) includes an internal temperature sensor delivering a chip temperature signal (θ°chip). A heating component (36) is mounted on the circuit board near the IMU, and it is provided a thermal guide, incorporated to the circuit board, extending between the heating component and the IMU so as to allow a transfer to the IMU of the heat produced by the heating component. This thermal guide may in particular be a metal planar layer incorporated to the board, in particular a ground plane. A thermal regulation circuit (44-62) receives as an input the chip temperature signal (θchip) and a set-point temperature signal (θ°ref), and delivers a piloting signal (
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Citations
11 Claims
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1. A drone, comprising a main circuit board (24) on which are mounted electronic components as well as an inertial unit, IMU, (26) comprising gyrometer sensors for measuring the instantaneous rotations of the drone in an absolute reference system, and/or accelerometer sensors for measuring accelerations of the drone in this reference system, the IMU (26) including an internal temperature sensor (34) delivering a chip temperature signal (θ
- °
chip),characterized in that it comprises; a heating component (28) mounted on the circuit board (24) near the IMU (26); a thermal guide (30) incorporated to the circuit board (24), this thermal guide extending between the heating component (28) and the IMU (26) so as to allow a transfer (32) to the IMU of the heat produced by the heating component; and a thermal regulation circuit (44-62), receiving as an input the chip temperature signal (θ
°
chip) and a predetermined set-point temperature signal (θ
°
ref), and outputting a heating component piloting signal (TH _PWM ), so as to control the heat supply to the IMU as a function of the difference between chip temperature and set-point temperature. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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Specification