Multi-channel multi-interface avionics data acquisition device

Abstract

The utility model provides a multichannel multi-interface avionics data acquisition device, which comprises at least one group of auxiliary control units, a core control unit, a CAN (controller area network) bus, sensors and drivers, the auxiliary control units are connected to the core control unit through the CAN bus, and each group of auxiliary control units is at least connected with one sensor and one driver; the auxiliary control unit is used for collecting sensor data information, and the core control unit is used for calculating and processing the received sensor data information, generating a digital control instruction and outputting the digital control instruction to the auxiliary control unit; the auxiliary control unit is further used for receiving the digital control instruction through the CAN bus, converting the digital control instruction into driver instruction information and sending the driver instruction information to the driver connected with the current auxiliary control unit; and the driver is used for controlling the external equipment according to the driver instruction information. And the number of acquisition and control channels can be expanded at will through the data acquisition device.

Description

Technical Field

[0001] The utility model relates to the technical field of data acquisition, in particular to an avionics data acquisition device with multiple channels and multiple interfaces. Background Art

[0002] In the field of avionics equipment data acquisition technology, fly-by-wire systems have gradually replaced traditional mechanical sensing devices. The number of electrical sensors in the system is increasing. Currently, the industry divides sensors into partitions for processing, and each area is equipped with a data acquisition subsystem. This requires the design of different signal acquisition and control systems for different sensor signals. This is not universal, and it is difficult to achieve coordinated processing and unified scheduling of the entire system, resulting in a waste of resources.

[0003] An avionics data acquisition device that is adaptable to multiple channels and multiple interfaces is proposed. For multi-sensor applications, a core control unit is used for unified scheduling, while auxiliary control units are used for specific data acquisition and control. This improves the adaptability and versatility of the system, and solves the problem that complex systems cannot be managed uniformly. Utility Model Content

[0004] In view of this, the embodiments of this specification provide a multi-channel, multi-interface avionics data acquisition device to achieve the purpose of arbitrarily expanding the number of acquisition and control channels.

[0005] The embodiments of this specification provide the following technical solutions:

[0006] A multi-channel, multi-interface avionics data acquisition device, comprising:

[0007] At least one group of auxiliary control units, a core control unit, a CAN bus, a sensor, and a driver, wherein the auxiliary control units are connected to the core control unit via the CAN bus, and each group of auxiliary control units is connected to at least one sensor and one driver;

[0008] The auxiliary control unit is used to collect sensor data information of the sensors connected to the current auxiliary control unit, and transmit the sensor data information to the core control unit through the CAN bus. The core control unit is used to calculate and process the received sensor data information to generate digital control instructions, and output the digital control instructions to the auxiliary control unit;

[0009] The auxiliary control unit is further used to receive digital control instructions via the CAN bus, convert the digital control instructions into driver instruction information, and send the information to the driver connected to the current auxiliary control unit;

[0010] The driver is used to control external devices according to the driver instruction information.

[0011] Furthermore, the auxiliary control unit includes:

[0012] A front-end conditioning circuit, a back-end conditioning circuit, a D / A conversion unit and an A / D conversion unit, wherein the front-end conditioning circuit is connected to the A / D conversion unit;

[0013] The auxiliary control unit is used to read and convert sensor data information of each sensor through the front-end conditioning circuit and the A / D conversion unit, generate converted sensor data information, and transmit the converted sensor data information to the CAN bus;

[0014] The auxiliary control unit is also used to obtain commands issued by the core control unit for the current auxiliary control unit from the CAN bus and execute the commands;

[0015] The auxiliary control unit is further used to output a driving voltage signal through a D / A conversion unit and a back-end conditioning circuit, and drive the driver through the driving voltage signal.

[0016] Furthermore, the auxiliary control unit further includes:

[0017] The program-controlled proportional adjustment circuit is respectively arranged at the front end of the A / D conversion unit and / or the rear end of the D / A conversion unit of the auxiliary control unit.

[0018] Furthermore, the programmable proportional regulation circuit includes:

[0019] A multi-stage same-direction proportional regulation circuit, wherein each stage of the same-direction proportional regulation circuit is connected in series, and the output of the previous stage of the same-direction proportional regulation circuit serves as the input of the next stage of the same-direction proportional regulation circuit;

[0020] Each stage of the same-direction proportional regulation circuit includes a multiplexer, a multi-stage control unit and an operational amplifier connected in sequence;

[0021] The amplification factors of operational amplifiers in the same-level and same-direction proportional regulation circuits are all different.

[0022] Furthermore, the core control unit includes:

[0023] DSP unit, FPGA unit and CAN bus interface;

[0024] The DSP unit and the FPGA unit are used to calculate the converted sensor data information sent by the auxiliary control unit, and send the generated calculation results as commands to the CAN bus through the CAN bus interface.

[0025] Furthermore, the multi-channel multi-interface avionics data acquisition device further includes:

[0026] The host computer and the serial communication interface, the host computer is connected to the core control unit via the serial communication interface;

[0027] The host computer is used to display the sensor data information received by the core control unit and send input instructions to the core control unit;

[0028] The host computer is also used to display the working status of each auxiliary control unit.

[0029] Compared with the prior art, the at least one technical solution adopted in the embodiments of this specification can achieve the following beneficial effects:

[0030] For multi-sensor situations, the core control unit is used for unified scheduling, and the auxiliary control units are used for specific collection and control, which improves the adaptability and versatility of the system and solves the problem that complex systems cannot be managed uniformly. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0032] Figure 1 It is a structural block diagram of an avionics data acquisition device according to an embodiment of the present utility model;

[0033] Figure 2 This is a schematic diagram of the working principle of the auxiliary control unit of an embodiment of the utility model;

[0034] Figure 3 It is a schematic diagram of the working principle of the program-controlled proportional regulation circuit in the auxiliary control unit of the utility model. DETAILED DESCRIPTION

[0035] The embodiments of the present application are described in detail below with reference to the accompanying drawings.

[0036] It should be noted that, in the absence of conflict, the embodiments and features of the embodiments in this application can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0037] like Figure 1 and Figure 2 As shown, a multi-channel and multi-interface avionics data acquisition device includes:

[0038] At least one group of auxiliary control units, a core control unit, a CAN bus, a sensor and a driver, the auxiliary control units are connected to the core control unit via the CAN bus, and each group of auxiliary control units is connected to at least one sensor and one driver.

[0039] The auxiliary control unit is responsible for collecting sensor data from sensors connected to the current auxiliary control unit and transmitting this sensor data to the core control unit via the CAN bus. The core control unit is responsible for processing the received sensor data to generate digital control instructions, which are then output to the auxiliary control unit. The auxiliary control unit is also responsible for receiving digital control instructions via the CAN bus, converting them into driver instructions, and transmitting them to the driver connected to the current auxiliary control unit. The driver controls external devices based on the driver instructions.

[0040] Auxiliary control unit, including:

[0041] A front-end conditioning circuit, a back-end conditioning circuit, a D / A conversion unit and an A / D conversion unit, wherein the front-end conditioning circuit is connected to the A / D conversion unit.

[0042] The auxiliary control unit is used to read and convert sensor data from each sensor through the front-end conditioning circuit and A / D conversion unit, generate converted sensor data, and transmit this converted sensor data to the CAN bus. The auxiliary control unit is also used to obtain commands issued by the core control unit from the CAN bus for the current auxiliary control unit and execute them. The auxiliary control unit is also used to output a drive voltage signal through the D / A conversion unit and back-end conditioning circuit, which drives the driver.

[0043] The auxiliary control unit also includes:

[0044] The program-controlled proportional adjustment circuit is respectively arranged at the front end of the A / D conversion unit and / or the rear end of the D / A conversion unit of the auxiliary control unit.

[0045] Programmable proportional regulation circuit, comprising:

[0046] A multi-stage non-directional proportional regulation circuit is described, wherein each stage of the non-directional proportional regulation circuit is connected in series, with the output of the previous stage's non-directional proportional regulation circuit serving as the input of the next stage's non-directional proportional regulation circuit. Each stage of the non-directional proportional regulation circuit includes a multiplexer, a multi-stage control unit, and an operational amplifier connected in sequence. The operational amplifiers of the same stage non-directional proportional regulation circuits have different amplification factors.

[0047] The core control unit includes a DSP unit, an FPGA unit, and a CAN bus interface. The DSP unit and FPGA unit are used to calculate the converted sensor data information sent by the auxiliary control unit and send the generated calculation results as commands to the CAN bus through the CAN bus interface.

[0048] The multi-channel, multi-interface avionics data acquisition device also includes:

[0049] The host computer and serial communication interface are connected to the core control unit via the serial communication interface. The host computer is used to display sensor data information received by the core control unit and send input commands to the core control unit. The host computer is also used to display the working status of each auxiliary control unit.

[0050] Specifically, the multi-channel, multi-interface avionics data acquisition device of the present invention adopts a master-multiple slave model. The device consists of a core control unit and multiple auxiliary control units. The core control unit and the auxiliary control units use a CAN bus as a framework to form a data and command exchange network. The core control unit's primary function is to make unified decisions, manage, and schedule the various auxiliary control units. The auxiliary control units' function is to perform specific signal acquisition, control, and servo output for each auxiliary control unit based on the data and commands from the core control unit. The auxiliary control units contain multiple A / D and D / A conversion resources. Both the front-end A / D conversion circuit and the back-end D / A conversion circuit incorporate programmable proportional adjustment circuits to match the various signal input and output voltage ranges of the different auxiliary control units.

[0051] The core control unit and auxiliary control units are combined into a data interaction network using the CAN bus. Auxiliary control units can be added at will by simply changing the number of auxiliary control units set in the core control unit, thereby arbitrarily expanding the number of acquisition and control channels.

[0052] All electronic components in the avionics data acquisition device use electronic components with a temperature range of -55°C to +125°C to match the complex application scenarios of avionics equipment.

[0053] The resources of the core control unit in the avionics data acquisition device include DSP chip, FPGA chip, CAN bus and RS232 interface. The DSP chip is responsible for data solution and information exchange, and the FPGA chip performs timing control. Its main functions are to make unified decisions, management and scheduling for each auxiliary control unit, as well as solve the position of complex systems, send solution results to each auxiliary control unit, decide the priority of auxiliary control units, and manage each auxiliary control unit in a unified manner; at the same time, it communicates with the PC through the RS232 chip, and provides real-time feedback on the system working status and the working status of each auxiliary control unit on the human-computer interaction interface, and receives input instructions from the human-computer interaction interface.

[0054] The auxiliary control unit's main function is to read the signal values ​​of each node through the front-end conditioning circuit and A / D conversion unit, placing the data on the CAN bus for the core control unit to read. It also obtains the auxiliary control unit's position information and command information issued by the core control unit from the CAN bus, executes the core control unit's commands, and outputs a drive voltage signal through the D / A conversion unit and back-end conditioning circuit to drive the subsequent actuation system. The A / D conversion unit is used to convert analog signals into digital signals, and the D / A conversion unit is used to convert digital signals into analog signals.

[0055] The auxiliary control unit also includes a sensor signal acquisition circuit, which is used to collect sensor data

[0056] The front-end conditioning circuit and the back-end conditioning circuit of the auxiliary control unit are both equipped with programmable proportional regulation circuits to match various input and output voltage ranges.

[0057] like Figure 3 As shown, the programmable proportional regulation circuit adopts a two-stage unidirectional proportional regulation circuit ( Figure 3 Because the amplification factor of a single unidirectional proportional control circuit cannot be too large, and the maximum number of amplification types can only match the number of multiplexer output terminals, a multi-pole series connection is used. To suppress the propagation of interference noise, the proportional coefficient of the pre-amplifier is much larger than that of the post-amplifier. The amplification factor of each proportional amplifier circuit can be customized. Logic is then used to control the sensor signal or servo output signal through two multiplexers to select the amplification factor, amplifying or reducing the signal to match various input and output voltage ranges. This structure enhances the versatility and scalability of the programmable proportional control circuit, allowing the input and output voltage ranges to be changed without changing the hardware.

[0058] Beneficial effects of the utility model:

[0059] The multi-channel, multi-interface avionics data acquisition device of the present invention adopts a method in which a core control unit is used for unified scheduling and auxiliary control units are used for specific data acquisition and control in situations with multiple sensors, thereby improving the adaptability and versatility of the system and solving the problem that complex systems cannot be managed in a unified manner.

[0060] The above are merely specific embodiments of the present invention and are not intended to limit the scope of the present invention. Therefore, substitutions of equivalent components, or equivalent changes and modifications made within the scope of protection of the present invention, should still fall within the scope of this patent. Furthermore, the technical features of the present invention may be freely combined with each other, with each other's technical solutions, and with each other's technical solutions.

Claims

1. A multi-channel, multi-interface avionics data acquisition device, characterized in that: include: At least one group of auxiliary control units, a core control unit, a CAN bus, a sensor, and a driver, wherein the auxiliary control units are connected to the core control unit via the CAN bus, and each group of auxiliary control units is connected to at least one of the sensors and one of the drivers; The auxiliary control unit is used to collect sensor data information of the sensor connected to the current auxiliary control unit, and transmit the sensor data information to the core control unit via the CAN bus; the core control unit is used to calculate and process the received sensor data information to generate digital control instructions, and output the digital control instructions to the auxiliary control unit; The auxiliary control unit is further configured to receive the digital control instruction via the CAN bus, convert the digital control instruction into driver instruction information, and send the information to the driver currently connected to the auxiliary control unit; The driver is used to control the external device according to the driver instruction information.

2. The multi-channel multi-interface avionics data acquisition device according to claim 1, characterized in that: The auxiliary control unit includes: A front-end conditioning circuit, a back-end conditioning circuit, a D / A conversion unit and an A / D conversion unit, wherein the front-end conditioning circuit is connected to the A / D conversion unit; The auxiliary control unit is used to read and convert sensor data information of each of the sensors through the front-end conditioning circuit and the A / D conversion unit, generate converted sensor data information, and transmit the converted sensor data information to the CAN bus; The auxiliary control unit is further configured to obtain a command issued by the core control unit for the current auxiliary control unit from the CAN bus and execute the command; The auxiliary control unit is further configured to output a driving voltage signal through the D / A conversion unit and the back-end conditioning circuit, and drive the driver through the driving voltage signal.

3. The multi-channel multi-interface avionics data acquisition device according to claim 2, characterized in that: The auxiliary control unit further includes: Program-controlled proportional regulation circuit; The program-controlled proportional adjustment circuit is respectively arranged at the front end of the A / D conversion unit and / or the back end of the D / A conversion unit of the auxiliary control unit.

4. The multi-channel multi-interface avionics data acquisition device according to claim 3, characterized in that: Programmable proportional regulation circuit, comprising: A multi-stage same-direction proportional regulation circuit, wherein the same-direction proportional regulation circuits of each stage are connected in series, and the output of the same-direction proportional regulation circuit of the previous stage serves as the input of the same-direction proportional regulation circuit of the next stage; Each stage of the same-direction proportional regulation circuit includes a multiplexer, a multi-stage control unit and an operational amplifier connected in sequence; The amplification factors of the operational amplifiers of the same-level and same-direction proportional adjustment circuits are all different.

5. The multi-channel multi-interface avionics data acquisition device according to claim 1, characterized in that: The core control unit comprises: DSP unit, FPGA unit and CAN bus interface; The DSP unit and the FPGA unit are used to calculate the converted sensor data information sent by the auxiliary control unit, and send the generated calculation results as commands to the CAN bus through the CAN bus interface.

6. The multi-channel, multi-interface avionics data acquisition device according to any one of claims 1 to 5, characterized in that: The multi-channel multi-interface avionics data acquisition device further includes: A host computer and a serial communication interface, wherein the host computer is connected to the core control unit via the serial communication interface; The host computer is used to display the sensor data information received by the core control unit and send input instructions to the core control unit; The host computer is also used to display the working status of each auxiliary control unit.

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