Light and small remote sensing camera integrated control system with main and standby consistent design

Abstract

According to the method, the light and small remote sensing camera comprehensive control system with the consistent main and standby design is realized, interaction of the satellite CAN bus module, the CAN bus module in the camera, the SPI bus module, the RS-422 interface module, the mechanism driving module, the OC instruction module, the analog quantity telemetering acquisition module, the temperature control module and the temperature measurement module is realized by integrating the SiP module, and the integration level is improved; meanwhile, the power supply and distribution module adopts a filter-first shunt power supply and distribution method, so that the size, weight and cost of the system are further reduced; through an RS-422 multifunctional combination output design method, combination output of four signals of pulse per second, PWM, I / O and UART serial ports of an integrated SiP module is realized. Through a main-standby consistency design method, the problems of main-standby coexistence of main-standby circuit signals, clear logic and no serial connection are solved; through a multifunctional analog quantity telemetering output design method, indirect telemetering multifunctional multiplexing is realized, so that main and standby telemetering signals coexist and are free from electricity crossing.

Description

Technical Field

[0001] The invention relates to a light and small remote sensing camera integrated control system with a main-standby consistent design, belonging to the field of aerospace remote sensing. Background Art

[0002] The camera integrated control equipment is a typical aerospace stand-alone product. It is an electronic product that enables the remote sensing camera to interact with the satellite to realize the camera's autonomous imaging control function. The product has the functions of communicating with the satellite, communicating with other equipment in the subsystem, power supply and distribution control, camera autonomous working mode and autonomous process control, autonomous closed-loop temperature measurement and control, and automatic mechanism drive.

[0003] The general camera integrated control equipment is planned into different circuit modules according to functional requirements and external interfaces, such as data processing circuit, temperature measurement and control circuit, command control circuit, telemetry acquisition circuit, mechanism drive circuit, power distribution control circuit, etc. Each functional module is an independent board, and each board has a relatively simple FPGA coprocessor system or digital circuit combination. Among them, the data processing circuit is mainly responsible for realizing satellite bus instruction parsing and execution, collecting telemetry values ​​and returning them to the satellite, sending commands to other single machines in the remote sensing camera and receiving telemetry, comprehensive scheduling in the remote sensing camera, program annotation, fault identification and recovery, etc. Other functional sub-boards are mainly responsible for cooperating with the data processing circuit to realize the corresponding interface expansion and functions.

[0004] This remote sensing camera integrated control system is very powerful and can adapt to complex remote sensing camera control. At the same time, each electrical interface expansion capability such as command, telemetry, temperature measurement, and temperature control is very strong, and the smallest component unit is about 50 channels, but the disadvantages are large size, heavy weight, and high cost. If each temperature measurement, temperature control, command, telemetry, and other interfaces of a remote sensing camera integrated control system only need a dozen or less channels, it is a bit of a waste to use a general camera integrated control device that includes circuit modules such as temperature measurement and temperature control circuits, command control circuits, and telemetry acquisition circuits with about 50 interfaces, and combine them in a single machine to achieve a product with about 10 channels. The size and weight of the product cannot be effectively controlled, which often leads to unnecessary waste. Summary of the invention

[0005] The technical problems solved by the present invention are: overcoming the deficiencies of the prior art, providing a light and small remote sensing camera integrated control system with a master-standby consistent design, using an integrated SiP module control to achieve reduced function and interface integration; further improving integration by optimizing the power supply and distribution mode and the RS-422 multi-function combination output design method; solving the problem of master-standby circuit signal coexistence, clear logic and no cross-connection through a master-standby consistency design method; and realizing indirect telemetry multi-function multiplexing through a multi-function analog telemetry output design method, so that the master-standby telemetry signals can coexist without cross-connection.

[0006] The technical solution of the present invention is: a light and small remote sensing camera integrated control system with a main and standby consistent design, including: a power supply and distribution module, an analog telemetry generation module, an integrated SiP module, a satellite CAN bus module, a camera internal CAN bus module, an SPI bus module, a power monitoring module, a memory module, an RS-422 interface module, a mechanism drive module, an OC instruction module, an analog telemetry acquisition module, a temperature control module, a temperature measurement module and an external connector module; wherein:

[0007] The power supply and distribution module is responsible for turning on and off each power supply in the remote sensing camera integrated control system, and outputs an electrical signal to the analog telemetry generation module when turned on;

[0008] The analog telemetry generation module receives the electrical signal output by the power supply and distribution module, and converts it into analog telemetry output to the external connector module;

[0009] The integrated SiP module is responsible for receiving the imaging control instructions, parameters and auxiliary data sent by the satellite control system through the satellite CAN bus module, and feeding back the telemetry information collected and encoded by this module to the satellite control system; sending imaging instructions to the remote sensing camera through the CAN bus module in the camera and receiving the telemetry information in the remote sensing camera; receiving the digital telemetry information of the expansion board in the remote sensing camera integrated control system collected by the SPI bus module, and encoding it and feeding it back to the satellite; sending data to the memory module; receiving the multi-channel RS422 pulse signal sent by the RS-422 interface module, and injecting it into the corresponding RS422 pulse receiving structure in the remote sensing camera; outputting data to the mechanism drive module to control the operation of the drive mechanism; sending control commands to the OC command module; the embedded A / D acquisition interface realizes the analog telemetry acquisition module; sending temperature control instructions to the temperature control module; the embedded A / D acquisition interface realizes the temperature measurement module;

[0010] The satellite CAN bus module is responsible for communicating with the satellite control system, receiving the imaging control instructions, parameters and auxiliary data sent by the satellite control system, and sending them to the integrated SiP module. At the same time, it feeds back the telemetry information collected and encoded by the integrated SiP module to the satellite control system for fault diagnosis;

[0011] The CAN bus module in the camera is responsible for the communication within the remote sensing camera, sending the imaging instructions sent by the integrated SiP module to the communicative device in the remote sensing camera, and at the same time collecting the digital telemetry information of the communicative device and sending it to the integrated SiP module;

[0012] The SPI bus module is responsible for communicating with the expansion board in the remote sensing camera integrated control system, sending instructions to the remote sensing camera integrated control system, and collecting digital telemetry information of the expansion board in the remote sensing camera integrated control system and sending it to the integrated SiP module;

[0013] The power monitoring module is responsible for monitoring the voltage status of each power supply in the circuit and resetting the system when an abnormality occurs in the voltage and power monitoring circuit;

[0014] The memory module is controlled by the integrated SiP module and stores the application program;

[0015] The RS-422 interface module receives RS422 pulse signals in various signal forms sent by the satellite control system, converts them into multiple RS422 pulse signals after performing logic AND and outputs them to the integrated SiP module; the RS-422 interface module realizes the combined input and output of RS422 pulse signal interfaces in various signal forms by multiplexing point numbers;

[0016] The mechanism driving module receives the output data of the integrated SiP module, and latches and converts it into the input signal of the MOS tube inside the mechanism driving module, realizes the high-current mechanism driving signal through the MOS tube, and controls the driving mechanism to work;

[0017] The OC instruction module receives the control command of the integrated SiP module and converts it into a negative pulse OC instruction and outputs it to the peripheral power supply to drive and control the peripheral power supply to power on and off;

[0018] The analog telemetry acquisition module uses the A / D acquisition interface embedded in the SiP module, which is responsible for collecting the analog telemetry output by each mechanism in the remote sensing camera integrated control system;

[0019] The temperature control module receives the temperature control instruction of the integrated SiP module, latches it and converts it into the input signal of the MOS tube, and then converts it into a high-current temperature control power signal through the MOS tube and outputs it to the heating plate, so that the heating plate controls the temperature of the remote sensing camera body;

[0020] The temperature measurement module uses the A / D acquisition interface embedded in the SiP module to collect the temperature generated by the thermistors at each temperature measurement point inside the remote sensing camera for remote measurement;

[0021] The external connector module is a combination of all external connectors when the remote sensing camera integrated control system communicates with the satellite control system, and is responsible for the transmission of all input and output signals when the remote sensing camera integrated control system communicates with the satellite control system;

[0022] Among them, the analog telemetry generation module, power supply and distribution module, and OC command module adopt the master-slave consistency interaction design method.

[0023] Preferably, the integrated SiP module of the light and small remote sensing camera comprehensive control system realizes 9 functional interfaces, including: A / B communication interface of the satellite CAN bus module, A / B communication interface of the CAN bus module in the camera, SPI bus A / B communication interface, 16-channel OC command output interface, 12-channel analog telemetry acquisition interface, maximum 2-channel mechanism drive output interface, 12-channel cold backup temperature control output interface, 12-channel cold backup temperature measurement interface, and 12-channel RS-422 output interface.

[0024] Preferably, the external connector module includes 11 external connectors, specifically:

[0025] The external connector X01 is responsible for receiving the input from the satellite control system to the satellite CAN bus module;

[0026] The external connector X02 is responsible for receiving the input from the satellite control system to the RS-422 interface module;

[0027] The external connector X03 is responsible for receiving input commands from the satellite control system to the power supply and distribution module;

[0028] External connector X04 is responsible for the output of the satellite CAN bus module to the satellite control system;

[0029] External connector X05 is responsible for the analog telemetry generation module to output telemetry to the satellite control system;

[0030] The external connector X06 is responsible for receiving the primary power supply voltage input from the satellite control system to the camera integrated control system;

[0031] The external connector X07 is responsible for the interaction of mechanism position telemetry and mechanism control signals between the satellite control system and the camera integrated control system;

[0032] The external connector X08 is responsible for receiving the indirect telemetry and temperature measurement instructions input by the satellite control system to the camera integrated control system, and is also responsible for the camera integrated control system to output OC instructions and temperature control results to the satellite control system;

[0033] External connector X09 is responsible for the output of the CAN bus module in the camera to the satellite control system;

[0034] External connector X10 is responsible for the output of RS-422 interface module to the satellite control system;

[0035] The external connector X11 is responsible for the camera integrated control system to output a primary power supply voltage monitoring signal to the satellite control system.

[0036] Preferably, when the remote sensing camera integrated control system performs autonomous imaging control, the specific process is as follows:

[0037] The satellite control system supplies power to the remote sensing camera integrated control system through the power supply and distribution module, and the power supply and distribution module outputs telemetry to represent the power-on status to the satellite control system through the analog telemetry generation module;

[0038] After the integrated SiP module completes the initialization self-test, it waits to receive satellite imaging commands through the satellite CAN bus module;

[0039] The integrated SiP module recognizes satellite imaging commands and autonomously powers up other devices within the remote sensing camera;

[0040] The integrated SiP module sends imaging instructions to the communication device in the remote sensing camera through the CAN bus module in the camera according to the satellite imaging command, and at the same time sends the second pulse to the communication device in the remote sensing camera through the RS-422 interface module to realize the time reference or synchronization signal;

[0041] The integrated SiP module controls the mechanism and drives the module to start the remote sensing camera imaging after the mechanism is in place. During the process, the device telemetry signal is collected through the analog telemetry acquisition module and fed back to the satellite through the external connector module.

[0042] Preferably, the remote sensing camera integrated control system performs autonomous imaging control while performing autonomous temperature measurement and control, and the specific process is as follows:

[0043] The satellite control system supplies power to the remote sensing camera integrated control system through the power supply and distribution module;

[0044] After power-on, the remote sensing camera integrated control system starts the temperature measurement and control function through the temperature measurement module and the temperature control module. The temperature measurement and control process is parallel to the imaging process and works independently of each other.

[0045] The temperature control module uses the received temperature control instruction as the target value, the temperature value collected by the temperature measurement module as a reference, and the control output of the temperature control module to achieve precise and autonomous temperature control of the remote sensing camera.

[0046] Preferably, the power supply and distribution module comprises: a fuse module, a filter module, a first on-off switch and a second on-off switch, a first starting current suppression module and a second starting current suppression module, and a power supply module; the power supply and distribution link including two loads is specifically:

[0047] The satellite power supply first passes through the fuse protection module in sequence, and then passes through the filter module for diversion and distribution. After that, the first branch passes through the first power-on / off switch and the first starting current suppression module in sequence, and the corresponding load is powered by the power supply corresponding to the first branch; the second branch passes through the second power-on / off switch and the second starting current suppression module in sequence, and the corresponding load is powered by the power supply corresponding to the second branch.

[0048] Preferably, the RS-422 interface module realizes the combined input and output of multiple signal forms of RS422 pulse signal interface by multiplexing point numbers, specifically:

[0049] Each interface of the RS-422 interface module adopts an RS-422 differential interface with an output capacity of 12 channels. There are four types of interfaces: 6-channel PWM RS-422 differential interface, which requires 24 electrical connector points; 6-channel I / O RS-422 differential interface, which requires 24 electrical connector points; 8-channel pulse-second RS-422 differential interface, which requires 32 electrical connector points; 4-channel receiving and 4-channel sending full-duplex UART serial port RS-422 interface, which requires 32 electrical connector points;

[0050] The above 112 electrical connector point numbers are multiplexed to select two or three of the four interfaces through multiple selection, and finally 48 electrical connector point numbers are used to achieve selective output, using one or more of the following multiplexing strategies:

[0051] PWM, I / O and pulse per second time-sharing multiplexing of 4 points, output through 1 channel RS422 differential interface;

[0052] PWM, I / O and serial port time-sharing multiplexing point number 4 point numbers, output through 1 channel RS422 differential interface;

[0053] Second pulse and serial port time-sharing multiplexing 4 point numbers, output through 1 channel RS422 differential interface;

[0054] PWM and serial port time-sharing multiplex 4 point numbers and output through 1 channel RS422 differential interface.

[0055] Preferably, the analog telemetry generation module, the power supply and distribution module, and the OC instruction module adopt a master-slave consistency interaction design method, specifically:

[0056] The main circuit and backup circuit structures of the remote sensing camera integrated control system are designed to be completely consistent. The main motherboard connector and the backup motherboard connector are set at the position where signal interaction is required. The main and backup motherboard connectors are connected to the signals of the analog telemetry generation module, the power supply and distribution module, and the OC command module. The circuits of each module on each motherboard connector are independent of each other, and each module circuit realizes the main or backup function according to the main and backup definition of the motherboard connector.

[0057] Preferably, the analog quantity telemetry generation module realizes the output of the mechanism driving power supply telemetry signal in the power supply and distribution module, and the mechanism driving power supply telemetry signal can be used as direct telemetry of the analog quantity telemetry generation module for external output, and can also be used as indirect telemetry of the analog quantity acquisition module.

[0058] Compared with the prior art, the present invention has the following advantages:

[0059] (1) The system described in the present invention can meet the integration requirements of a small number of various interfaces. Under the conditions of the same interface indicators and with backup functions, it is equivalent to integrating boards with no less than 5 functions into a board of the same size. The weight can be reduced from about 10kg of existing products to about 2.8kg, and the volume can be reduced from 240mm×170mm×196mm of the previous remote sensing camera integrated control system to about 240mm×170mm×70mm. The volume and weight are at least reduced to less than 36% of the existing technology, and the integration level is increased by about 3 times; it solves the problems of large volume, heavy weight, high cost and low integration level of remote sensing camera electronic products;

[0060] (2) Compared with the prior art, the present invention adopts a method of first filtering and then shunting the power supply and distribution, providing a high filter utilization rate. On the basis of maintaining the functions of the original power supply and distribution scheme, the two power supply channels can be powered off and off at different times and the filtering effect of the circuit can be achieved, saving a set of fuses and filters, and further reducing the volume, weight and cost of the system;

[0061] (3) The present invention uses 48 electrical connector points, saving 64 electrical connector points, realizing 4 types of signal outputs, including second pulse of 8-channel differential RS-422 interface, serial port (including input and output) of 4-channel differential RS-422 interface, PWM, I / O of 6-channel differential RS-422 interface, and improving the adaptability of multiple types of interfaces of remote sensing camera integrated control system;

[0062] (4) The present invention proposes a master-backup consistency design idea, which realizes that the master-backup circuit schematic and PCB design are completely consistent, and at the same time, the master-backup circuit signal is output from the master circuit. The compatible contents involved include master-backup synthetic power supply, cold backup power supply, telemetry acquisition signal, OC command signal, etc., which can achieve master-backup compatibility and master-backup output, realize master-backup consistency design, and save design and development time cost;

[0063] (5) The dual application design method of direct telemetry (analog telemetry collected by satellites, which needs to be output to satellites for collection) and indirect telemetry (analog telemetry collected by the camera integrated control system itself, which does not need to be output to satellites for collection) of the present invention can not only realize the master-backup consistency design concept, but also provide direct telemetry for satellite collection. At the same time, it can also realize indirect telemetry collected by the camera integrated control system itself. Indirect telemetry can be used for telemetry collection of different devices, realizing a telemetry design with multiple applications and improving the adaptability of the product. BRIEF DESCRIPTION OF THE DRAWINGS

[0064] Figure 1 This is a block diagram of the remote sensing camera integrated control system of the present invention;

[0065] Figure 2 It is a schematic diagram of a power supply and distribution module of the present invention;

[0066] Figure 3 It is a schematic diagram of the RS-422 interface module of the present invention;

[0067] Figure 4 A schematic diagram of the master-slave consistency interaction design method of the present invention;

[0068] Figure 5 It is a schematic diagram of the analog quantity telemetry generation module of the present invention. DETAILED DESCRIPTION

[0069] The technical solution of the method of the present invention is: a light and small remote sensing camera integrated control system with a main and standby consistent design, including a power supply and distribution module, an analog telemetry generation module, an integrated SiP module, a satellite CAN bus module, a camera internal CAN bus module, an SPI bus module, a power monitoring module, a memory module, an RS-422 interface module, a mechanism drive module, an OC instruction module, an analog telemetry acquisition module, a temperature control module, a temperature measurement module and an external connector module, see Figure 1 .in:

[0070] The power supply and distribution module is responsible for receiving the primary power supply of the remote sensing camera integrated control system, protecting and filtering the primary power supply, powering on and off the digital, analog and command power supplies and the mechanism drive power supply under the control of satellite commands, starting current suppression, and secondary power supply conversion and power supply of the digital circuit, analog circuit, OC command circuit and mechanism drive load, and can provide the mechanism power supply capability of 2-way stepper motors;

[0071] The analog telemetry generation module is responsible for generating the analog telemetry of the digital, analog, instruction and mechanism power output by the power distribution module and outputting it to the external connector module, which is collected by the satellite to judge the power status of the remote sensing camera integrated control system.

[0072] The integrated SiP module adopts LSMEU01 embedded management execution unit SiP module to build the minimum system implementation, which is responsible for parsing satellite commands and controlling the data address bus, CAN bus interface, telemetry interface, command interface, PIO and other corresponding load interfaces, receiving and forwarding setting parameters and auxiliary data, performing temperature measurement and control algorithm calculation, mechanism driving, imaging control process and fault diagnosis processing, etc.

[0073] The satellite CAN bus module is directly implemented by the CAN protocol ASIC circuit and transceiver embedded in the SiP module, without the need for other external interface chips, and is directly output from the CAN interface of the SiP module to the X01 of the external connector module. It is responsible for communicating with the satellite, receiving the imaging control instructions, parameters and auxiliary data sent by the satellite into the integrated SiP module, and at the same time feeding back the telemetry information encoded by the integrated SiP module to the satellite for fault judgment, and performing A and B hot backup bus communication;

[0074] The CAN bus module in the camera is implemented by the CAN protocol ASIC circuit embedded in the integrated SiP module, which requires an external transceiver and is then connected to the X09 of the external connector module. It is responsible for communicating with other devices in the remote sensing camera, sending imaging control instructions, parameters and auxiliary data to other devices in the remote sensing camera, and collecting digital telemetry information from other devices, which is then encoded by the integrated SiP module and fed back to the satellite for CAN bus interface communication with hot backup of A and B.

[0075] The SPI bus module is implemented using the SPI protocol ASIC circuit embedded in the SiP module to realize a 3-transmit 1-receive SPI interface, which requires an external RS-422 interface chip and is then connected to the master-slave consistency interaction module of the external connector module. It is responsible for communicating with other expansion board devices in the remote sensing camera integrated control system, sending instructions to other expansion boards in the remote sensing camera integrated control system, and collecting digital telemetry information from other expansion boards, which is then encoded by the integrated SiP module and fed back to the satellite to perform SPI bus interface communication for hot backup of A and B.

[0076] The power monitoring module is a power monitoring system built by an independent power monitoring chip. It is responsible for monitoring the power supply voltage status of the circuit, resetting the system when the digital power supply 5V is lower than the unacceptable voltage of the system, and protecting the system from abnormal output signals of unstable logic chips. At the same time, it is also responsible for monitoring whether the integrated SiP module program is out of control. If the program is out of control, the program cannot effectively set the power monitoring circuit. After the 1.6s set signal times out, it outputs a reset signal to reset the system.

[0077] The memory module is composed of an anti-fuse PROM memory with high external reliability of the integrated SiP module, which is controlled by the data and address bus of the integrated SiP module and stores user application programs. The anti-fuse PROM memory storage area is immune to single-particle upsets and has high radiation resistance characteristics in orbit;

[0078] The RS-422 interface module is implemented by the ASIC circuit of PWM, PIO and UART functions embedded in the SiP module, and needs to be connected to an external RS-422 chip, and then connected to the X10 of the external connector module. After receiving the satellite RS422 pulse signal and performing logic AND, it is converted into multiple RS422 pulse signals and output to other devices in the remote sensing camera for pulse synchronization or data injection, which can realize a total of 4 channels of RS-422 differential interface input and 12 channels of RS-422 differential interface output.

[0079] The mechanism driving module is realized by driving the power MOS tube after the data and address bus of the integrated SiP module latches the signal through the external digital circuit of the integrated SiP module. It is responsible for converting the data latch output by the integrated SiP module into the input signal of the MOS tube, and realizing the high-current mechanism driving power signal through the MOS tube, which is used to control the stepper motor to work, and can be compatible with the control capability of the stepper motor mechanism interface of two sets of four-phase eight-beat control;

[0080] The OC instruction module is directly implemented by the OC instruction driving circuit embedded in the SiP module, without the need for other external interface chips, and is directly output to X08 of the external connector module. The OC instruction interface of the SiP module is used to output negative pulse OC instructions, drive and control the control devices of the peripheral power supply and power off, such as relays, etc., and can realize 12-way OC instruction interfaces;

[0081] The analog telemetry acquisition module uses the A / D acquisition interface embedded in the SiP module, and does not need to be connected to other interface chips. It directly outputs to the X08 of the external connector module. It is responsible for collecting analog telemetry of other devices or the machine, and can realize 12-channel analog telemetry interface;

[0082] The temperature control module is realized by driving the power MOS tube after the data and address bus of the integrated SiP module latches the signal through the external digital circuit of the integrated SiP module. The data latch output by the integrated SiP module is converted into the input signal of the MOS tube, and the high-current temperature control power signal output is realized through the MOS tube, which is used for the heating plate to control the temperature of the camera body, and a 12-way temperature control interface can be realized;

[0083] The temperature measurement module uses the A / D acquisition interface embedded in the SiP module, and does not need to be connected to other interface chips. It directly outputs to the X08 of the external connector module. It is responsible for collecting the temperature measurement generated by the thermistors at each temperature measurement point of the camera structure, and can realize 12-way temperature measurement interface;

[0084] The external connector module is a combination of external electrical connectors numbered X01 to X11, which realizes the transmission of power supply and all input and output signals of the remote sensing camera integrated control system. Specifically:

[0085] External connector X01 is responsible for the input of satellite control system to satellite CAN bus module;

[0086] External connector X02 is responsible for the input of the satellite control system to the RS-422 interface module;

[0087] External connector X03 is responsible for the satellite control system inputting instructions to the power supply and distribution module;

[0088] External connector X04 is responsible for the output of the satellite CAN bus module to the satellite control system;

[0089] External connector X05 is responsible for the analog telemetry generation module to output direct telemetry to the satellite control system;

[0090] External connector X06 is responsible for the satellite control system inputting primary power supply voltage to the camera integrated control system;

[0091] The external connector X07 is responsible for the interaction of the satellite control system and the camera integrated control system quality inspection mechanism position telemetry and mechanism control signals;

[0092] External connector X08 is responsible for the satellite control system to input indirect telemetry and temperature measurement instructions to the camera integrated control system, and is also responsible for the camera integrated control system to output OC instructions and temperature control results to the satellite control system;

[0093] External connector X09 is responsible for the output of the CAN bus module in the camera to the satellite control system;

[0094] External connector X10 is responsible for the output of RS-422 interface module to the satellite control system;

[0095] The external connector X11 is responsible for the camera integrated control system to output a primary power supply voltage monitoring signal to the satellite control system.

[0096] The method of the present invention realizes the imaging control and thermal control of the camera under the comprehensive scheduling of the SiP module for all other modules of the remote sensing camera integrated control system, realizes the miniaturization and scalability of the system through a certain structural invention method, and adapts to the miniaturization control requirements of the remote sensing camera.

[0097] (1) The light and small remote sensing camera integrated control system of the present invention:

[0098] The integrated SiP module is used to realize the complete minimum system, the required power supply is realized through the power supply and distribution module, the power supply status telemetry is output through the analog telemetry generation module, and the integrated SiP module is used as the control core. The satellite CAN bus module, the camera CAN bus module, the SPI bus module, the RS-422 interface module, the mechanism drive module, the OC instruction module, the analog telemetry acquisition module, the temperature control module, the temperature measurement module and other modules are all independent modules, and there is no interaction between them. They are all directly realized by the integrated SiP module or realized by using the ASIC embedded in the integrated SiP module in conjunction with the peripheral interface chip; the memory module stores the running program of the integrated SiP module; the power monitoring module realizes the power supply monitoring output by the power supply and distribution module and the program run-off reset of the integrated SiP module; the external connector module is responsible for the input and output of the signals of the satellite CAN bus module, the camera CAN bus module, the SPI bus module, the RS-422 interface module, the mechanism drive module, the OC instruction module, the analog telemetry module, the temperature control module and the temperature measurement module through the connector.

[0099] This system uses the ASIC embedded in the integrated SiP module in conjunction with the peripheral interface chip to implement 9 functional interfaces. This system integrates the minimum system based on the integrated SiP module and 9 functional interfaces into a 6U industrial board to achieve the goals of high interface integration and interface combination output. The 9 functional interfaces include satellite CAN bus A / B communication interface, camera CAN bus A / B communication interface, SPI bus A / B communication interface, 16-channel OC command output interface, 12-channel analog telemetry acquisition interface, maximum 2-channel mechanism drive output interface, 12-channel cold backup temperature control output interface, 12-channel cold backup temperature measurement interface, and 12-channel RS-422 output interface. The system has many interfaces, strong expansion capabilities, and many controllable devices, which can cover the current imaging control of remote sensing cameras. After the system and functional interface integration optimization, the remote sensing camera comprehensive control system with master and backup functions weighs about 2.8kg and has a volume of 240mm×170mm×70mm. For details, see Figure 1 .

[0100] (2) The present invention realizes remote sensing camera control through autonomous imaging control and autonomous temperature measurement and control:

[0101] The satellite's power-on and power-off commands control the power-on of the remote sensing camera integrated control system. The analog telemetry generation module outputs telemetry to represent the power-on status. After the integrated SiP module completes the initialization self-test, it waits to receive satellite imaging commands through the satellite CAN bus module. The imaging circuit, motion mechanism and other equipment are powered on autonomously. The imaging parameters and imaging times are sent to the imaging circuit through the CAN bus module in the camera. The RS-422 interface module sends second pulses to the imaging circuit to achieve time reference or synchronization. The mechanism drive module drives the mechanism into place and starts remote sensing camera imaging. During the process, the analog telemetry acquisition module collects telemetry feedback of the imaging circuit and motion mechanism to provide satellite health status.

[0102] After power-on, the remote sensing camera integrated control system starts the temperature measurement and control function of the remote sensing camera. The temperature measurement and control process is parallel to the imaging process and works independently. The satellite CAN bus module receives the satellite temperature control command as the target value, the temperature value collected by the temperature measurement module is used as a reference, and the control output of the temperature control module is used to achieve precise and autonomous temperature control of the remote sensing camera. The SPI module is an expansion module of the temperature control function sub-board. When more than 12 channels of temperature control and temperature measurement channels are required, the expansion of the temperature measurement and control sub-board is realized. The temperature measurement and control workflow of the sub-board is the same as that of the remote sensing camera integrated control system.

[0103] (3) The power supply and distribution module of the present invention: Figure 2 As shown, as a sub-module of the remote sensing camera integrated control system, it is composed of: a fuse module, a filter module, a first power-on / off switch (hereinafter referred to as: power-on / off switch 1) and a second power-on / off switch (hereinafter referred to as: power-on / off switch 2), a first starting current suppression module (hereinafter referred to as: starting current suppression module 1) and a second starting current suppression module (hereinafter referred to as: starting current suppression module 2), a digital, analog and command power supply module, and a mechanism drive power supply module.

[0104] The use method of the present invention includes two load power supply and distribution links, one of which is a power supply and distribution link for digital, analog and command power loads, which realizes overcurrent protection through a fuse module, and then realizes noise filtering of satellite power supplies before and after the filter through a filter module. The integrated SiP module realizes slow startup and power-on of a startup current suppression module 1 through OC command control and a power-off switch 1. The startup current suppression module 1 realizes that when two loads are connected to a satellite power supply, instantaneous damage to the satellite power supply will not be caused. The digital, analog and command power supply module realizes the conversion of digital power supply, analog power supply and command power supply for digital, analog and command loads;

[0105] The working process of another power supply and distribution link is similar to that of the first link. The power supply of the mechanism drive power is transformed and supplied to the mechanism load through the power-off switch 2, the starting current suppression module 2 and the mechanism drive power supply module. The present invention uses this power supply and distribution module design. Specifically, the satellite power supply first passes through the fuse protection module, and then passes through the filter module for shunting and distribution, so that the fuse protection module and the filter module are shared, and the power-off switch 1 and the power-off switch 2 are turned on in time for filtering, so as to realize the noise filtering of the satellite power supply before and after the filter; and then passes through the starting current suppression module and the digital, analog and command power supply module to supply power to the digital, analog and command loads and the mechanism loads.

[0106] The advantage of the power supply and distribution module described in the present invention is that the filter module is moved forward, and the power distribution method is adopted that the power is first passed through the fuse protection module and the filter module and then divided and distributed, thereby realizing the shared utility of the fuse protection module and the filter module. At the same time, the power-on and power-off switches 1 and 2 are turned on and filtered in a time-sharing manner.

[0107] (4) The RS-422 interface module of the present invention: Figure 3 As shown, the interface output capacity is 12 channels of RS-422 differential interface output, which can realize RS422 interface combined input and output in various signal forms, including:

[0108] One channel of the RS422 interface described in the present invention requires four electrical connector point numbers (the RS422 interface has two signal outputs, RS422+ and RS422-, and a single signal requires two points to improve reliability). Therefore, a 6-channel PWM RS-422 differential interface requires 24 point numbers, a 6-channel I / O RS-422 differential interface requires 24 point numbers, an 8-channel (4 groups, A / B hot backup) second pulse RS-422 differential interface requires 32 point numbers, and a 4-channel receiving, 4-channel sending full-duplex UART serial port RS-422 interface requires 32 point numbers. The four interfaces require a total of 112 electrical connector point numbers. The method of the present invention selects two or three of the multiplexing point numbers of the four interfaces (such as the multiplexing point number of the second pulse and the serial port, the multiplexing point number of PWM, I / O and the second pulse, the multiplexing point number of the PWM, I / O and the serial port, the second pulse and the serial port, the PWM and the serial port, etc.) through 48 electrical connector points to achieve the selected output. Examples of optional results: 12-channel RS422 differential interface includes 4 channels of second pulse form, 2-channel receiving / 2-channel sending full-duplex UART serial form, 4-channel PWM form RS422 differential interface. The multiplexing strategy is:

[0109] PWM, I / O and second pulse multiplex 4 point numbers, PWM, I / O and second pulse do not exist at the same time, and are output through 1 channel RS422 differential interface; PWM, I / O and serial port multiplex 4 point numbers, PWM, I / O and serial port do not exist at the same time, and are output through 1 channel RS422 differential interface; second pulse and serial port multiplex 4 point numbers, second pulse and serial port do not exist at the same time, and are output through 1 channel RS422 differential interface; PWM and serial port multiplex 4 point numbers, PWM and serial port do not exist at the same time, and are output through 1 channel RS422 differential interface.

[0110] There are 16 electrical connector points for pulse-per-second output A1 and B1, pulse-per-second output A2 and B2, 16 electrical connector points for full-duplex UART serial port 0 input and output, and 16 electrical connector points for full-duplex UART serial port 1 input and output, and 16 electrical connector points for PWM imaging control outputs 0, 1, 2, and 3. A total of 12 channels of RS-422 differential interface combination outputs are realized, including 4-channel pulse-per-second RS-422 differential interface, 2-channel receiving and 2-channel sending full-duplex UART serial port RS-422 differential interface, and 4-channel PWM RS-422 differential interface;

[0111] The second pulse output A1 and B1 have a total of 8 electrical connector points, the full-duplex UART serial port 0 input and output, the full-duplex UART serial port 1 input and output have a total of 16 electrical connector points, and the PWM imaging control outputs 0, 1, 2, 3, 4, and 5 use a total of 24 electrical connector points. A total of 12 channels of RS-422 differential interface combination outputs are realized, including a 2-channel second pulse RS-422 differential interface, a 2-channel receiving and 2-channel sending full-duplex UART serial port RS-422 differential interface, and a 6-channel PWM RS-422 differential interface;

[0112] There are 32 electrical connector points for pulse-per-second output A1 and B1, pulse-per-second output A2 and B2, pulse-per-second output A3 and B3, and pulse-per-second output A4 and B4, and 16 electrical connector points for PWM imaging control output 0, 1, 2, and 3. A total of 12 channels of RS-422 differential interface combination outputs are realized, including 8 channels of RS-422 differential interface in the form of pulse-per-second and 4 channels of RS-422 differential interface in the form of PWM;

[0113] The second pulse outputs A1 and B1 have a total of 8 electrical connector point numbers, the full-duplex UART serial port 0, 1, 2, 3 input and output have a total of 32 electrical connector point numbers, and the PWM imaging control outputs 4 and 5 use a total of 8 electrical connector point numbers. A total of 12 channels of RS-422 differential interface combination outputs are realized, including 2-channel second pulse RS-422 differential interface, 4-channel receiving and 4-channel sending full-duplex UART serial port RS-422 differential interface, and 2-channel PWM RS-422 differential interface; 6-channel PWM RS-422 differential interface can be realized: the PWM signal characteristics are PWM (pulse width modulation pulse) output within a period of 4.096ms; 6-channel I / O RS-422 differential interface can be realized: the minimum change period of the I / O signal characteristics is greater than 100ns, and the high and low level outputs are customized; 8-channel (4 groups, A / B hot backup) second pulse RS-422 differential interface output can be realized: one low level pulse is output per second, and the frequency is less than 10MHz; 4-channel full-duplex UART serial port RS-422 interface output including receiving and sending can be realized: full-duplex, 4-channel sending RS-422 interface, 4-channel receiving RS-422 interface, and the communication rate is less than or equal to 1Mbps.

[0114] According to the diagram, the example of the use of the RS-422 interface module of the present invention is "second pulse output BX / PWM imaging control input Y (X, Y are digital numbers)" which can realize the integrated SiP module's own PWM, I / O signal and second pulse output; "RS422 serial port X output / PWM imaging control output Y (X, Y are digital numbers)". The utility of this module is that the 12-channel RS-422 differential interface can realize the combined output of PWM, I / O, second pulse and UART serial port, thereby improving the expansion capability of the system and adapting to different expansion devices.

[0115] (5) The master-slave consistency interaction design method described in the present invention: the master circuit and the backup circuit of the remote sensing camera integrated control system are designed to be completely consistent, and a master motherboard connector and a backup motherboard connector are set at the location where signal interaction is required. The master and backup motherboard connectors are connected to the signals of the analog telemetry generation module, the power supply and distribution module, and the OC command module. The module circuits on each motherboard connector are independent of each other, and each module circuit realizes the master or backup function according to the master-slave definition of the motherboard connector on which it is located.

[0116] like Figure 4 As shown, the master-slave consistency interaction idea involves the master / backup motherboard connector, resistors R1, R2, R3, R4, R5, R1', R2', R3', R4', R5', and diodes D1, D2, D1', and D2'.

[0117] For the telemetry interface generated by the analog telemetry generation module, the master-backup consistency interaction design and output are realized: for example, the mechanism drive power supply telemetry (YC1) of the analog telemetry generation module, the main circuit selects to use the resistor R1, and the backup circuit selects to use the resistor R1':

[0118] The resistor R1 is in the main circuit, one end of which is connected to the main mechanism driving power telemetry output of the external connector, and the other end is connected to the mechanism driving power telemetry (YC1) of the main motherboard connector and the backup telemetry point of the external connector;

[0119] The resistor R1' is in the backup circuit, one end of which is connected to the main mechanism driving power telemetry output of the external connector, and the other end is connected to the mechanism driving power telemetry YC1 of the backup motherboard connector and the backup telemetry point of the external connector;

[0120] The mechanism drive power supply telemetry (YC1) of the main motherboard connector and the backup motherboard connector are connected together through wires to achieve consistent telemetry design of the main and backup circuits while coexisting with the main and backup circuits. The logic is clear and there is no cross-current. The mechanism drive power supply telemetry main telemetry point and backup telemetry point are both output from the external electrical connector module of the main circuit.

[0121] For the mechanism driving power supply V1 of the mechanism driving power supply module in the power supply and distribution module, the main and backup consistency design and output are realized: the main part selects to use resistors R2 and R3, and selects to use power diodes D1 and D2; the backup circuit selects to use resistors R2' and R3', and selects not to use power diodes D1' and D2':

[0122] Resistors R2 and R3 are connected in parallel to the main circuit, one end of R2 and R3 is connected to the positive electrode of diode D1 and then output to the mechanism driving main external connector mechanism driving power supply V1, and the other end is connected to the mechanism driving power supply V1 of the main motherboard connector and the mechanism driving power supply V1 backup, and then output to the mechanism driving main external connector mechanism driving power supply V1 through the positive electrode of D2;

[0123] The resistors R2' and R3' are connected in parallel to the backup circuit, one end of the resistors R2' and R3' is connected to the positive electrode of the power diode D1' and then output to the mechanism driving backup external connector mechanism driving power supply V1, and the other end is connected to the mechanism driving power supply V1 of the backup motherboard connector and the mechanism driving power supply V1 backup and then output to the mechanism driving power supply V1 of the mechanism driving backup external connector through the positive electrode of the power diode D2';

[0124] The mechanism driving power supply V1 of the main motherboard connector and the backup motherboard connector is connected together through a wire, so that the main and backup circuit mechanism driving power supply designs are consistent, and the main and backup coexist, with clear logic and no cross-current. The mechanism driving power supply V1 is output from the external electrical connector module of the main circuit after the main and backup are merged;

[0125] For the digital power supply V2 involved in the digital, analog and command power supply in the power supply and distribution module, the main and backup consistency design and output are realized: R4 is selected for the main circuit, and R4' is selected for the backup circuit:

[0126] The resistor R4 is in the main circuit, one end of which is connected to the main point of the external connector digital power supply V2, and the other end is connected to the digital power supply V2 of the main motherboard connector and the backup point of the digital power supply V2 of the external connector;

[0127] The resistor R4' is in the backup circuit, one end of which is connected to the main point of the external connector digital power supply V2, and the other end is connected to the digital power supply V2 of the backup motherboard connector and the backup point of the digital power supply V2 of the external connector;

[0128] The digital power supply V2 of the main motherboard connector and the backup motherboard connector is connected together through wires, so that the digital power supply design of the main and backup circuits is consistent and the main and backup circuits coexist, the logic is clear and there is no cross-current. The main point and backup point of the digital power supply V2 of the external electrical connector are output from the external electrical connector module of the main circuit;

[0129] For the OC instruction output interface of the OC instruction module, the master-backup consistency design and output are realized: for example, OC instruction 1, the master copy selects to use R5, and the backup circuit selects to use R5':

[0130] The resistor R5 is in the main circuit, one end of which is connected to the main point of the external connector OC instruction 1, and the other end is connected to the OC instruction 1 of the main motherboard connector and the backup point of the external connector OC instruction 1;

[0131] The resistor R5' is in the backup circuit, one end of which is connected to the main point of the external connector OC instruction 1, and the other end is connected to the OC instruction 1 of the backup motherboard connector and the backup point of the external connector OC instruction 1;

[0132] The OC instruction 1 of the main motherboard connector and the backup motherboard connector are connected together through wires to achieve consistent digital power supply design of the main and backup circuits while coexisting with the main and backup circuits. The logic is clear and there is no cross-connection. The main point and backup point of OC instruction 1 are both output from the external electrical connector module of the main circuit.

[0133] If the primary and backup circuits are swapped, the logic is the same. When connecting to the outside, swap RX and RX' (X is the sequence number) to achieve different selections for the same primary and backup designs, thereby improving design efficiency.

[0134] (6) The analog quantity telemetry generation module of the present invention: The mechanism driving power supply telemetry YC1 of the analog quantity telemetry generation module is the power supply status monitoring output signal of the mechanism driving power supply module in the power supply and distribution module. The mechanism driving power supply telemetry YC1 can be used as the direct telemetry of the analog quantity telemetry generation module for external output, and can also be used as the indirect telemetry of the analog quantity acquisition module, such as Figure 5 As shown, the main / backup of the mechanism driving signal switches between the suspended and grounded states, and the mechanism telemetry backup YC1 represents the telemetry of the mechanism action.

[0135] The first method of use: If you select the institutional telemetry backup YC1 as the direct telemetry collected directly by the satellite, choose not to use the main acquisition channel ADIN1 <0> After connecting R5, connect the telemetry master YC1 and ADIN1 <0> The path connecting R6 and the main integrated SiP module is not used for backup R5', R6'ADIN1 <0> 'Connect R5' and then connect the mechanism telemetry backup YC1, ADIN1 <0> 'Connect R6' and the backup integrated SiP module. At this time, the main telemetry YC1 of the mechanism is output through X01 as direct telemetry, and the backup telemetry YC1 of the mechanism is output through X01' as direct telemetry, and one of the acquisition channels ADIN1 of the main circuit analog acquisition module <0> and backup circuit ADIN1 <0> 'The telemetry channel is idle, choose to use the backup ADIN1 <0> Connecting the R7' pathway to the main copy of ADIN1 <0> Connect R7 path to ADIN1 of motherboard <0> and ADIN1 <0> 'Through the wire connection, it can be used as an indirect telemetry for other devices. The main and backup circuits can collect ADIN1 through the integrated SiP module <0> and ADIN1 <0> 'Telemetry.

[0136] The second method of use: If the selected mechanism telemetry YC1 is direct telemetry, and ADIN <0> Not used. Based on the first method, you need to use ADIN1. <0> Connect to the master R6 to GND path and ADIN1 <0> 'Connect backup R6' to the GND path to ensure that there are no CMOS input floating pins on the component pins.

[0137] The third method of use: If you select the institution telemetry YC1 as indirect telemetry, select ADIN1 <0> Connect the master R5 to the direct telemetry master external electrical connector X01 to the mechanism telemetry master YC1 and ADIN1 <0> 'Connecting backup R5' to R4' finally reaches the mechanism telemetry backup YC1 of the direct telemetry main copy external electrical connector X01, and keeps selecting to use backup R4', and selects not to use the main copy R4 (this is the telemetry interface generated by the analog telemetry generation module of implementation mode (5) to realize the main and backup consistency interaction design and output), and selects not to use the main copy R7 and backup R7', the main copy R6 and backup R6'. At this time, ADIN <0> It cannot be used as an indirect telemetry channel for other equipment and can only be defined as institutional telemetry YC1. The direct telemetry primary / backup external electrical connector and the indirect telemetry primary / backup external electrical connector must be left floating and cannot be connected to any telemetry.

[0138] The three usage methods realize flexible output of power telemetry, while maximizing the utilization of resources of different usage methods, adapting to three different application scenarios and matching the usage needs of different users.

[0139] The contents not described in detail in the specification of the present invention belong to the prior art known to the professional and technical personnel in this field.

Claims

1. A light and small remote sensing camera integrated control system with a main and standby consistent design, characterized in that include: Power supply and distribution module, analog telemetry generation module, integrated SiP module, satellite CAN bus module, camera internal CAN bus module, SPI bus module, power monitoring module, memory module, RS-422 interface module, mechanism drive module, OC instruction module, analog telemetry acquisition module, temperature control module, temperature measurement module and external connector module; among which: The power supply and distribution module is responsible for turning on and off each power supply in the remote sensing camera integrated control system, and outputs an electrical signal to the analog telemetry generation module when turned on; The analog telemetry generation module receives the electrical signal output by the power supply and distribution module, and converts it into analog telemetry output to the external connector module; The integrated SiP module is responsible for receiving the imaging control instructions, parameters and auxiliary data sent by the satellite control system through the satellite CAN bus module, and feeding back the telemetry information collected and encoded by this module to the satellite control system; sending imaging instructions to the remote sensing camera through the CAN bus module in the camera and receiving the telemetry information in the remote sensing camera; receiving the digital telemetry information of the expansion board in the remote sensing camera integrated control system collected by the SPI bus module, and encoding it and feeding it back to the satellite; sending data to the memory module; receiving the multi-channel RS422 pulse signal sent by the RS-422 interface module, and injecting it into the corresponding RS422 pulse receiving structure in the remote sensing camera; outputting data to the mechanism drive module to control the operation of the drive mechanism; sending control commands to the OC command module; the embedded A / D acquisition interface realizes the analog telemetry acquisition module; sending temperature control instructions to the temperature control module; the embedded A / D acquisition interface realizes the temperature measurement module; The satellite CAN bus module is responsible for communicating with the satellite control system, receiving the imaging control instructions, parameters and auxiliary data sent by the satellite control system, and sending them to the integrated SiP module. At the same time, it feeds back the telemetry information collected and encoded by the integrated SiP module to the satellite control system for fault diagnosis; The CAN bus module in the camera is responsible for the communication within the remote sensing camera, sending the imaging instructions sent by the integrated SiP module to the communicative device in the remote sensing camera, and at the same time collecting the digital telemetry information of the communicative device and sending it to the integrated SiP module; The SPI bus module is responsible for communicating with the expansion board in the remote sensing camera integrated control system, sending instructions to the remote sensing camera integrated control system, and collecting digital telemetry information of the expansion board in the remote sensing camera integrated control system and sending it to the integrated SiP module; The power monitoring module is responsible for monitoring the voltage status of each power supply in the circuit and resetting the system when an abnormality occurs in the voltage and power monitoring circuit; The memory module is controlled by the integrated SiP module and stores the application program; The RS-422 interface module receives RS422 pulse signals in various signal forms sent by the satellite control system, converts them into multiple RS422 pulse signals after performing logic AND and outputs them to the integrated SiP module; the RS-422 interface module realizes the combined input and output of RS422 pulse signal interfaces in various signal forms by multiplexing point numbers; The mechanism driving module receives the output data of the integrated SiP module, and latches and converts it into the input signal of the MOS tube inside the mechanism driving module, realizes the high-current mechanism driving signal through the MOS tube, and controls the driving mechanism to work; The OC instruction module receives the control command of the integrated SiP module and converts it into a negative pulse OC instruction and outputs it to the peripheral power supply to drive and control the peripheral power supply to power on and off; The analog telemetry acquisition module uses the A / D acquisition interface embedded in the SiP module, which is responsible for collecting the analog telemetry output by each mechanism in the remote sensing camera integrated control system; The temperature control module receives the temperature control instruction of the integrated SiP module, latches it and converts it into the input signal of the MOS tube, and then converts it into a high-current temperature control power signal through the MOS tube and outputs it to the heating plate, so that the heating plate controls the temperature of the remote sensing camera body; The temperature measurement module uses the A / D acquisition interface embedded in the SiP module to collect the temperature generated by the thermistors at each temperature measurement point inside the remote sensing camera for remote measurement; The external connector module is a combination of all external connectors when the remote sensing camera integrated control system communicates with the satellite control system, and is responsible for the transmission of all input and output signals when the remote sensing camera integrated control system communicates with the satellite control system; Among them, the analog telemetry generation module, power supply and distribution module, and OC command module adopt the master-slave consistency interaction design method.

2. According to claim 1, a light and small remote sensing camera integrated control system with a master-standby consistent design is characterized by: The integrated SiP module of the light and small remote sensing camera integrated control system realizes 9 functional interfaces, including: A / B communication interface of satellite CAN bus module, A / B communication interface of CAN bus module in camera, SPI bus A / B communication interface, 16-channel OC command output interface, 12-channel analog telemetry acquisition interface, maximum 2-channel mechanism drive output interface, 12-channel cold backup temperature control output interface, 12-channel cold backup temperature measurement interface, and 12-channel RS-422 output interface.

3. According to claim 1, a light and small remote sensing camera integrated control system with a master-standby consistent design is characterized by: The external connector module contains 11 external connectors, specifically: The external connector X01 is responsible for receiving the input from the satellite control system to the satellite CAN bus module; The external connector X02 is responsible for receiving the input from the satellite control system to the RS-422 interface module; The external connector X03 is responsible for receiving input commands from the satellite control system to the power supply and distribution module; External connector X04 is responsible for the output of the satellite CAN bus module to the satellite control system; External connector X05 is responsible for the analog telemetry generation module to output telemetry to the satellite control system; The external connector X06 is responsible for receiving the primary power supply voltage input from the satellite control system to the camera integrated control system; The external connector X07 is responsible for the interaction of mechanism position telemetry and mechanism control signals between the satellite control system and the camera integrated control system; The external connector X08 is responsible for receiving the indirect telemetry and temperature measurement instructions input by the satellite control system to the camera integrated control system, and is also responsible for the camera integrated control system to output OC instructions and temperature control results to the satellite control system; External connector X09 is responsible for the output of the CAN bus module in the camera to the satellite control system; External connector X10 is responsible for the output of RS-422 interface module to the satellite control system; The external connector X11 is responsible for the camera integrated control system to output a primary power supply voltage monitoring signal to the satellite control system.

4. According to claim 1, a light and small remote sensing camera integrated control system with a master-standby consistent design is characterized by: When the remote sensing camera integrated control system performs autonomous imaging control, the specific process is as follows: The satellite control system supplies power to the remote sensing camera integrated control system through the power supply and distribution module, and the power supply and distribution module outputs telemetry to represent the power-on status to the satellite control system through the analog telemetry generation module; After the integrated SiP module completes the initialization self-test, it waits to receive satellite imaging commands through the satellite CAN bus module; The integrated SiP module recognizes satellite imaging commands and autonomously powers up other devices within the remote sensing camera; The integrated SiP module sends imaging instructions to the communication device in the remote sensing camera through the CAN bus module in the camera according to the satellite imaging command, and at the same time sends the second pulse to the communication device in the remote sensing camera through the RS-422 interface module to realize the time reference or synchronization signal; The integrated SiP module controls the mechanism and drives the module to start the remote sensing camera imaging after the mechanism is in place. During the process, the device telemetry signal is collected through the analog telemetry acquisition module and fed back to the satellite through the external connector module.

5. According to claim 4, a light and small remote sensing camera integrated control system with a master-standby consistent design is characterized by: The remote sensing camera integrated control system performs autonomous imaging control and autonomous temperature measurement and control at the same time. The specific process is as follows: The satellite control system supplies power to the remote sensing camera integrated control system through the power supply and distribution module; After power-on, the remote sensing camera integrated control system starts the temperature measurement and control function through the temperature measurement module and the temperature control module. The temperature measurement and control process is parallel to the imaging process and works independently of each other. The temperature control module uses the received temperature control instruction as the target value, the temperature value collected by the temperature measurement module as a reference, and the control output of the temperature control module to achieve precise and autonomous temperature control of the remote sensing camera.

6. According to claim 1, a light and small remote sensing camera integrated control system with a master-standby consistent design is characterized by: The power supply and distribution module comprises: a fuse module, a filter module, a first on-off switch and a second on-off switch, a first starting current suppression module and a second starting current suppression module, and a power supply module; the power supply and distribution link comprising two loads is specifically: The satellite power supply first passes through the fuse protection module in sequence, and then passes through the filter module for diversion and distribution. After that, the first branch passes through the first power-on / off switch and the first starting current suppression module in sequence, and the corresponding load is powered by the power supply corresponding to the first branch; the second branch passes through the second power-on / off switch and the second starting current suppression module in sequence, and the corresponding load is powered by the power supply corresponding to the second branch.

7. According to claim 1, a light and small remote sensing camera integrated control system with a master-standby consistent design is characterized by: The RS-422 interface module realizes the combined input and output of RS422 pulse signal interfaces in various signal forms by multiplexing point numbers, specifically: Each interface of the RS-422 interface module adopts an RS-422 differential interface with an output capacity of 12 channels. There are four types of interfaces: 6-channel PWM RS-422 differential interface, which requires 24 electrical connector points; 6-channel I / O RS-422 differential interface, which requires 24 electrical connector points; 8-channel pulse-second RS-422 differential interface, which requires 32 electrical connector points; 4-channel receiving and 4-channel sending full-duplex UART serial port RS-422 interface, which requires 32 electrical connector points; The above 112 electrical connector point numbers are multiplexed to select two or three of the four interfaces through multiple selection, and finally 48 electrical connector point numbers are used to achieve selective output, using one or more of the following multiplexing strategies: PWM, I / O and pulse per second time-sharing multiplexing of 4 points, output through 1 channel RS422 differential interface; PWM, I / O and serial port time-sharing multiplexing point number 4 point numbers, output through 1 channel RS422 differential interface; Second pulse and serial port time-sharing multiplexing 4 point numbers, output through 1 channel RS422 differential interface; PWM and serial port time-sharing multiplex 4 points, output through 1 channel RS422 differential interface.

8. According to claim 1, a light and small remote sensing camera integrated control system with a master-standby consistent design is characterized by: The analog telemetry generation module, power supply and distribution module, and OC command module adopt the master-slave consistency interaction design method, specifically: The main circuit and backup circuit structures of the remote sensing camera integrated control system are designed to be completely consistent. The main motherboard connector and the backup motherboard connector are set at the position where signal interaction is required. The main and backup motherboard connectors are connected to the signals of the analog telemetry generation module, the power supply and distribution module, and the OC command module. The circuits of each module on each motherboard connector are independent of each other, and each module circuit realizes the main or backup function according to the main and backup definition of the motherboard connector.

9. According to claim 1, a light and small remote sensing camera integrated control system with a master-standby consistent design is characterized by: The analog quantity telemetry generation module realizes the output of the mechanism driving power supply telemetry signal in the power supply and distribution module. The mechanism driving power supply telemetry signal can be used as the direct telemetry of the analog quantity telemetry generation module for external output, and can also be used as the indirect telemetry of the analog quantity acquisition module.

Images