Double-Hall sensor circuit for SADA

Abstract

A double-Hall-sensor circuit for SADA comprises a main circuit, and the main circuit comprises a zero-position Hall sensor and an auxiliary Hall sensor which are installed on the SADA, and a conditioning circuit which is connected with the zero-position Hall sensor and the auxiliary Hall sensor and is located in the SADE. The zero Hall sensor is installed at the mechanical zero position of the SADM, and the auxiliary Hall sensor is installed at the positive polarity swing angle maximum value position or the negative polarity swing angle maximum value position of the SADM. And the conditioning circuit is used for supplying power to the zero-position Hall sensor and the auxiliary Hall sensor, performing pull-up and filtering processing on output signals of the zero-position Hall sensor and the auxiliary Hall sensor and then supplying the output signals to the MCU in the SADE. A signal acquisition environment in which the zero Hall sensor and the auxiliary Hall sensor are combined for angle measurement is established, so that the MCU determines zero returning logic, and the problem that a single Hall sensor cannot adapt to the swing type SADA is solved. The system also comprises a backup line which adopts the same structure as the main line, thereby improving the stability.

Description

Technical Field

[0001] The present application relates to solar panel driving technology, and in particular to a dual Hall sensor circuit for SADA. Background Art

[0002] The Solar Array Drive Assembly (SADA) is one of the key single-unit equipment of the satellite. It consists of the Solar Array Drive Machinery (SADM) and the Solar Array Drive Electro-circuit (SADE). It is responsible for the solar array orientation, signal and power transmission. The SADA of commercial aerospace mostly uses stepper motors as the driving source. This type of SADA is open-loop control, and the angular position is represented by the step angle. The step angle clears the accumulated angle error through the zero return mode, thereby ensuring high-precision angular position control.

[0003] At present, some models of SADA use the solution of combining Hall sensors with magnets. The Hall sensor is installed at the mechanical zero position or specified position of the fixed end of the SADM. The magnet is installed at the low-speed rotating end of the SADM. The magnet rotates with the low-speed shaft and cooperates with the Hall sensor installed at the fixed end to detect the zero position signal of the mechanism. When the magnet rotates close to the Hall sensor, the Hall sensor senses the magnetic field of the magnet, and the high and low levels of its output Hall signal are converted. SADE detects the Hall signal through the Hall signal processing circuit, and realizes the SADM rotation angle position control according to the number of stepper motor pulse steps, and then completes the zero return logic.

[0004] For SADA products with conductive slip rings, SADA can achieve 360° continuous rotation, and the Hall sensor can realize edge detection in the 360° full circle rotation, thereby completing the zero return mode. In order to reduce costs, commercial aerospace SADA products usually use swing cables instead of conductive slip rings. Therefore, this type of SADA is a swing type, that is, it swings back and forth within a limited angle, such as ±170° reciprocating swing. When a single Hall sensor is used for zero return operation, since SADE cannot obtain SADM angular position information in real time, it is impossible to determine the zero return direction, and thus a complex zero return logic needs to be designed to complete the zero return operation. Utility Model Content

[0005] In order to solve the deficiencies of the above-mentioned prior art, the present application provides a dual Hall sensor circuit for SADA, which builds a signal acquisition environment in which a zero-position Hall sensor and an auxiliary Hall sensor jointly measure angles, so that the MCU can determine the return-to-zero logic, thereby solving the problem that a single Hall sensor cannot adapt to a swinging SADA.

[0006] In order to achieve the above purpose, the utility model adopts the following technologies:

[0007] A dual Hall sensor circuit for SADA includes a main circuit, the main circuit includes a zero-position Hall sensor and an auxiliary Hall sensor installed on the SADM, and a conditioning circuit connected to the zero-position Hall sensor and the auxiliary Hall sensor and located in the SADM;

[0008] The zero position Hall sensor is installed at the mechanical zero position of the SADM, and the auxiliary Hall sensor is installed at the maximum positive polarity swing angle position or the maximum negative polarity swing angle position of the SADM;

[0009] The conditioning circuit is used to supply power to the zero-position Hall sensor and the auxiliary Hall sensor, and to pull up and filter the output signals of the zero-position Hall sensor and the auxiliary Hall sensor and then provide them to the MCU in the SADE.

[0010] The conditioning circuit includes a pull-up circuit 1, a low-pass filter, a hysteresis comparator and a pull-up circuit 2; wherein the pull-up circuit 1 is used to pull up the output signals of the zero-position Hall sensor and the auxiliary Hall sensor and then input them into the low-pass filter; the low-pass filter is used to perform low-pass filtering on the input signal to filter out high-frequency noise and then input it into the non-inverting input terminal of the hysteresis comparator; the hysteresis comparator is used to output a binary signal to the pull-up circuit 2 based on the signal input at the non-inverting input terminal and the reference level connected to its inverting input terminal; the pull-up circuit 2 is used to pull up the output signal of the hysteresis comparator and then output it to the MCU.

[0011] The output signal of the zero-position Hall sensor is processed by the conditioning circuit to form a signal Szero, and the output signal of the auxiliary Hall sensor is processed by the conditioning circuit to form a signal Saux. The signal Szero is transmitted to the capture port CAP1 of the MCU, and the signal Saux is transmitted to the capture port CAP2 of the MCU.

[0012] Furthermore, it also includes a backup circuit, which adopts the same structure as the main circuit, and the main circuit and the backup circuit are not powered on at the same time.

[0013] The beneficial effects of the utility model are:

[0014] 1. Two Hall sensors provide Hall signals from the mechanical zero position and the maximum positive swing angle position / the maximum negative swing angle position respectively, and provide them to the MCU after being processed by the conditioning circuit, so that the MCU can determine the zero return logic according to the signal Szero and the signal Saux, and realize the Hall sensor zero return in the swing type SADA;

[0015] 2. Use a main line and a backup line with the same structure. When one of the lines fails to work properly, switch to the other line to ensure the stability of work. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a basic circuit diagram of the circuit of the embodiment of the present application.

[0017] Figure 2 It is a schematic diagram of the installation positions of the zero-position Hall sensor and the auxiliary Hall sensor in an embodiment of the present application.

[0018] Figure 3 It is a schematic diagram of the main circuit and backup circuit of an embodiment of the present application. DETAILED DESCRIPTION

[0019] In order to make the purpose, technical solutions and advantages of the embodiments of the utility model clearer, the implementation methods of the utility model are described in detail below in conjunction with the accompanying drawings, but the embodiments described in the utility model are only part of the embodiments of the utility model, rather than all the embodiments.

[0020] The present application embodiment provides a dual Hall sensor circuit for SADA, such as Figure 1 As shown, it includes a zero-position Hall sensor and an auxiliary Hall sensor installed on the SADM, and a conditioning circuit connected to the zero-position Hall sensor and the auxiliary Hall sensor and located in the SADE.

[0021] like Figure 2 As shown, the zero position Hall sensor is installed at the mechanical zero position of the SADM, and the auxiliary Hall sensor is installed at the maximum positive polarity swing angle position or the maximum negative polarity swing angle position of the SADM, wherein the mechanical zero position is set at the middle position of the positive and negative polarities of the SADM, and the positive and negative polarities are symmetrical.

[0022] The conditioning circuit is connected to the MCU in the SADE, and is used for the zero-position Hall sensor and the auxiliary Hall sensor, and is used for pulling up and filtering the output signals of the zero-position Hall sensor and the auxiliary Hall sensor and providing them to the MCU.

[0023] Specifically, the conditioning circuit includes a pull-up circuit 1 , a low-pass filter, a hysteresis comparator and a pull-up circuit 2 .

[0024] The pull-up circuit 1 is used to pull up the output signals of the zero-position Hall sensor and the auxiliary Hall sensor and then input them into the low-pass filter; the low-pass filter is used to perform low-pass filtering on the input signal to filter out high-frequency noise and then input it into the non-inverting input terminal of the hysteresis comparator; the hysteresis comparator is used to output a binary signal to the pull-up circuit 2 based on the signal input to the non-inverting input terminal and the reference level connected to its inverting input terminal; the pull-up circuit 2 is used to pull up the output signal of the hysteresis comparator and then output it to the MCU.

[0025] The output signal of the zero-position Hall sensor is processed by the conditioning circuit to form a signal Szero, and the output signal of the auxiliary Hall sensor is processed by the conditioning circuit to form a signal Saux. The signal Szero is transmitted to the capture port CAP1 of the MCU, and the signal Saux is transmitted to the capture port CAP2 of the MCU.

[0026] By providing Hall signals from the mechanical zero position and the positive polarity swing angle maximum position / negative polarity swing angle maximum position respectively, and providing them to the MCU after being processed by the conditioning circuit, the MCU can determine the zero return logic according to the signal Szero and the signal Saux, thereby realizing the Hall sensor method zero return in the swing type SADA.

[0027] Preferably, in order to improve the stability of line operation, the line described in the above embodiment is used as the main line, and an additional backup line is set in the form of cold backup. The main line and the backup line use the same circuit structure, and the overall line formed is as follows: Figure 3 As shown, when one of the lines fails to work normally, it switches to another line to ensure the stability of operation.

[0028] The above description is only a preferred embodiment of the present application and is not intended to limit the present application. Obviously, those skilled in the art can make various changes and modifications to the present application without departing from the spirit and scope of the present application.

Claims

1. A dual Hall sensor circuit for SADA, characterized in that: The main circuit includes a zero-position Hall sensor and an auxiliary Hall sensor installed on the SADM, and a conditioning circuit connected to the zero-position Hall sensor and the auxiliary Hall sensor and located in the SADM; The zero position Hall sensor is installed at the mechanical zero position of the SADM, and the auxiliary Hall sensor is installed at the maximum positive polarity swing angle position or the maximum negative polarity swing angle position of the SADM; The conditioning circuit is used to supply power to the zero-position Hall sensor and the auxiliary Hall sensor, and to pull up and filter the output signals of the zero-position Hall sensor and the auxiliary Hall sensor and then provide them to the MCU in the SADE.

2. The dual Hall sensor circuit for SADA according to claim 1, characterized in that: The conditioning circuit includes a pull-up circuit 1, a low-pass filter, a hysteresis comparator and a pull-up circuit 2; The pull-up circuit 1 is used for pulling up the output signals of the zero-position Hall sensor and the auxiliary Hall sensor and then inputting them into a low-pass filter; The low-pass filter is used to perform low-pass filtering on the input signal to filter out high-frequency noise and then input it into the non-inverting input terminal of the hysteresis comparator; The hysteresis comparator is used to output a binary signal to the pull-up circuit 2 according to the signal input to the non-inverting input terminal and the reference level connected to the inverting input terminal; The pull-up circuit 2 is used to pull up the output signal of the hysteresis comparator and then output it to the MCU.

3. The dual Hall sensor circuit for SADA according to claim 2, characterized in that: The output signal of the zero-position Hall sensor is processed by the conditioning circuit to form a signal Szero, and the output signal of the auxiliary Hall sensor is processed by the conditioning circuit to form a signal Saux. The signal Szero is transmitted to the capture port CAP1 of the MCU, and the signal Saux is transmitted to the capture port CAP2 of the MCU.

4. The dual Hall sensor circuit for SADA according to any one of claims 1 to 3, characterized in that: It also includes a backup line, which adopts the same structure as the main line, and the main line and the backup line are not powered on at the same time.

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