Universal switching value control module

Abstract

The utility model provides a universal switching value control module. The universal switching value control module comprises a data processing system and a switching value output interface circuit, the data processing system is connected with the switching value output interface circuit, and the switching value output interface circuit is connected with the actuating device; and the data processing system is used for generating a control signal and transmitting the control signal to the switching value output interface circuit so as to control the actuating device by controlling the on-off state of the switching value output interface circuit. The switching value control module can output different control signals through the data processing system to control the on-off of the switching value output interface circuit, so that different actuating devices are controlled, and the universality of the control module is improved.

Description

Technical Field

[0001] The utility model relates to the field of avionics systems of launch vehicles, and particularly relates to a general switching quantity control module. Background Art

[0002] In the avionics system of a launch vehicle, it is necessary to control various actuating devices such as solenoid valves, pyrotechnics, and relays. Usually, for different actuating devices, different switching quantity control circuits need to be designed, making the design forms of the switching quantity control circuits complex and diverse, the usage scenarios limited, and the generality poor.

[0003] To improve the generality of the switching quantity control circuit, it is particularly important to design a general switching quantity control module. Summary of the Utility Model

[0004] The purpose of the utility model is to overcome the deficiencies of the prior art and provide a general switching quantity control module.

[0005] The utility model provides a general switching quantity control module, including: a data processing system and a switching quantity output interface circuit; the data processing system is connected to the switching quantity output interface circuit, and the switching quantity output interface circuit is connected to an actuating device; the data processing system is used to generate a control signal and transmit it to the switching quantity output interface circuit to control the actuating device by controlling the switching state of the switching quantity output interface circuit.

[0006] According to an embodiment of the utility model, multiple types of the switching quantity output interface circuits are included, which are respectively connected to different external driving power supplies to adaptively control different actuating devices.

[0007] According to an embodiment of the utility model, an anti-backflow circuit and an internal driving power supply are further included; the external driving power supply is connected to the switching quantity output interface circuit through the internal driving power supply to supply power to the switching quantity output interface circuit; the anti-backflow circuit is arranged between the external driving power supply and the internal driving power supply to prevent the external driving power supply from being backflowed.

[0008] According to an embodiment of the utility model, a peak suppression circuit is further included, and the peak suppression circuit is connected in parallel with the switching quantity output interface circuit and connected to the external driving power supply to clamp the voltage across the switching quantity output interface circuit within the safe operating voltage range.

[0009] According to an embodiment of the utility model, an external connector is further included, and the switching quantity output interface circuit is connected to the actuating device through the external connector to control the actuating device.

[0010] According to an embodiment of the present utility model, it further includes an isolation acquisition circuit, and the isolation acquisition circuit is connected to the digital output interface circuit and the data processing system to acquire the output signal of the digital output interface circuit and transmit it to the data processing system.

[0011] According to an embodiment of the present utility model, it includes a plurality of the digital output interface circuits that are redundant with each other.

[0012] According to an embodiment of the present utility model, the data processing system includes an FPGA, and the FPGA is used for processing input signals.

[0013] According to an embodiment of the present utility model, the data processing system includes a tertiary power supply to supply power to the data processing system and the digital output interface circuit.

[0014] According to an embodiment of the present utility model, it includes a plurality of isolation acquisition circuits 10 that are redundant with each other.

[0015] According to the general digital control module of the present utility model, the data processing system controls the on / off of the digital output interface circuit by outputting different control signals, realizing the control of different actuating devices and improving the versatility of the control module.

[0016] It should be understood that the above general description and the following specific embodiments are only exemplary and explanatory, and cannot limit the scope claimed by the present utility model. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The following drawings are part of the specification of the present utility model, which illustrate the exemplary embodiments of the present utility model. The attached drawings and the description of the specification are used together to explain the principle of the utility model.

[0018] Figure 1 It is a system block diagram of the general digital control module according to an embodiment of the present utility model;

[0019] Figure 2 It is a schematic diagram of the general digital control module according to an embodiment of the present utility model;

[0020] Figure 3 It is a schematic diagram of the process of controlling the digital output according to an embodiment of the present utility model;

[0021] Figure 4 It is a waveform diagram when the digital output interface circuit is connected according to an embodiment of the present utility model when the load is a solenoid valve;

[0022] Figure 5 It is a waveform diagram when the digital output interface circuit is disconnected according to an embodiment of the present utility model when the load is a solenoid valve;

[0023] Figure 6 It is a waveform diagram when the switching quantity output interface circuit of an embodiment of the present utility model is connected when the load is a 2A resistive load;

[0024] Figure 7 It is a waveform diagram when the switching quantity output interface circuit of an embodiment of the present utility model is disconnected when the load is a 2A resistive load;

[0025] Figure 8 Schematic diagram of the process of controlling the acquisition signal of the switching quantity output in an embodiment of the present utility model.

[0026] Explanation of the reference numerals in the drawings:

[0027] 1 - Data processing system; 2 - Switching quantity output interface circuit; 3 - Actuating device; 4 - Inner connector; 5 - External driving power supply; 6 - Anti - backflow circuit; 7 - Internal driving power supply; 8 - Anti - peak - elimination circuit; 9 - Outer connector; 10 - Isolation acquisition circuit; 11 - External controller; ① - Switching quantity output signal; ② - Driving current flowing to the load. Specific embodiments

[0028] The features and exemplary embodiments of various aspects of the present utility model will be described in detail below. To make the objectives, technical solutions and advantages of the present utility model more clear and understandable, the present utility model will be further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are only configured to explain the present utility model, for exemplarily illustrating the principles of the present utility model, and are not configured to limit the present utility model. Additionally, the components in the drawings are not necessarily drawn to scale. For example, the sizes of some components or regions in the drawings may be enlarged for other components or regions to assist in understanding the embodiments of the present utility model.

[0029] The orientation terms appearing in the following descriptions are all the directions shown in the drawings, and do not specifically limit the structure of the embodiments of the present utility model. In the description of the present utility model, it should be noted that unless otherwise specified, the terms "installed", "connected", and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected, or indirectly connected through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0030] Furthermore, the terms "comprising", "including", "having", or any other variants thereof are intended to cover non-exclusive inclusion, such that a structure or component including a series of elements not only includes those elements but also other elements not expressly listed or inherent to the structure or component. Without further limitation, an element defined by the statement "comprising..." does not preclude the presence of additional identical elements in the article or device including the element.

[0031] Spatial relationship terms such as "below", "beneath", "under", "lower", "above", "on", "higher", etc. are used for convenience of description to explain the positioning of one element relative to a second element, and are intended to cover different orientations of the device in addition to the orientations shown in the figures. Additionally, for example, "one element is on / under another element" can mean that the two elements are in direct contact or that there are other elements between the two elements. Furthermore, terms such as "first", "second", etc. are also used to describe various elements, regions, parts, etc., and do not particularly refer to an order or sequence and should not be construed as limiting. Similar terms denote similar elements throughout the description.

[0032] In the process of describing the present utility model below, in certain scenario descriptions, only "rocket", "launch vehicle", "spacecraft", "space launch vehicle", or "missile" may be used. This is merely for convenience of description, and its connotation is not limited to the specific words used. Generally, the rockets of the present utility model include not only launch vehicles for carrying satellites, spacecraft, or other detectors, but also various missiles, rockets, and other weapons for carrying payloads, as well as similar products capable of sending payloads into the air. Those skilled in the art should not limit the rocket to only one of a launch vehicle or a missile based on the specific words used in the description scenario, thereby narrowing the protection scope of the present utility model.

[0033] For those skilled in the art, the present utility model can be implemented without some of these specific details. The following description of the embodiments is merely to provide a better understanding of the present utility model by showing examples of the present utility model.

[0034] Figure 1 is a system block diagram of a general switch quantity control module according to an embodiment of the present utility model; Figure 2 is a schematic diagram of a general switch quantity control module according to an embodiment of the present utility model; Figure 3 is a schematic diagram of the process of controlling the switch quantity output according to an embodiment of the present utility model; Figure 4 is a waveform diagram when the switch quantity output interface circuit is connected when the load is a solenoid valve according to an embodiment of the present utility model; Figure 5When the load is a solenoid valve, it is the waveform diagram when the switching quantity output interface circuit of an embodiment of the present invention is disconnected; Figure 6 When the load is a 2A resistive load, it is the waveform diagram when the switching quantity output interface circuit of an embodiment of the present invention is connected; Figure 7 When the load is a 2A resistive load, it is the waveform diagram when the switching quantity output interface circuit of an embodiment of the present invention is disconnected; Figure 8 Schematic diagram of the process of controlling the acquisition signal of the switching quantity output in an embodiment of the present invention.

[0035] Such as Figure 1 and 2 As shown in

[0036] Specifically, the existing switching quantity control circuits have defects such as long development cycle, repeated development, weak switching ability, poor maintainability and scalability.

[0037] In this embodiment, the data processing system can receive signals from an external controller (such as digital voltage signals and communication signals) through an internal connector, and send control signals to the switching quantity output interface circuit to control the actuating device. The switching quantity output interface circuit (such as the patents with publication numbers CN114355807A or CN108614179B) can be equivalent to a switch for controlling multiple actuating devices. The data processing system controls the on / off of the switching quantity output interface circuit by outputting different control signals, realizing the control of different actuating devices, improving the versatility of the control module, thereby improving the design efficiency and shortening the development cycle.

[0038] For example, the external controller can send a 5V digital voltage signal and a communication signal to the data processing system through the internal connector. The data processing system analyzes the received communication signal and converts it into a switching quantity control signal to control the on / off state of the switching quantity output interface circuit to control the corresponding actuating device.

[0039] Furthermore, the switching quantity control module further includes an internal connector 4.

[0040] The switching quantity control module of this embodiment can adopt an internal connector of model LRM8 - A60 - T2.

[0041] According to an embodiment of the present utility model, the digital output interface circuit can be implemented by selecting an NMOS transistor with a relatively large driving current and a small package, and realizing multi-channel parallel output of digital signals to meet the driving current requirements of the actuating device.

[0042] According to an embodiment of the present utility model, the digital control module includes multiple types of digital output interface circuits, which are respectively connected to different external driving power supplies 5 to adaptively control different actuating devices.

[0043] The digital control module provided in this embodiment can output driving currents of different magnitudes by setting multiple types of digital output interface circuits and connecting them to different external driving power supplies, meeting the driving current requirements of different actuating devices.

[0044] For example, the digital control module includes two types of digital output interface circuits. The data processing system outputs 32 control signals to the two types of digital output interface circuits, and the two types of digital output interface circuits can output two driving currents. Each type of digital output interface circuit can output 16 driving currents to further cover the control requirements for different actuating devices.

[0045] According to an embodiment of the present utility model, in addition to the data processing system and the digital output interface circuit, the digital control module further includes an anti-backflow circuit 6 and an internal driving power supply 7. The external driving power supply 5 is connected to the digital output interface circuit 2 through the internal driving power supply 7 to supply power to the digital output interface circuit 2. The anti-backflow circuit 6 is arranged between the external driving power supply 5 and the internal driving power supply 7 to prevent the external driving power supply from being backflowed.

[0046] In this embodiment, the anti-backflow circuit realizes the one-way conductivity from the external driving power supply to the internal driving power supply, protecting the external driving power supply from being backflowed. Each output of the traditional digital output circuit is provided with an anti-backflow diode (for example, each of the 32-channel digital output circuits needs to be provided with a diode anti-backflow circuit). In this embodiment, by arranging the anti-backflow circuit between the external driving power supply and the internal driving power supply, the volume of the digital control module is greatly reduced, and the hardware cost is reduced. The anti-backflow circuit can adopt a diode combination circuit.

[0047] In addition, for multiple types of digital output interface circuits, different external driving power supplies can be correspondingly connected, different internal driving power supplies can be set, or different external driving power supplies can be combined into one path and the internal driving power supplies can be combined into one path to increase the driving current, meeting the control requirements for different actuating devices and making the digital control module more flexible to use.

[0048] According to an embodiment of the present utility model, in addition to the data processing system and the digital output interface circuit, the digital control module further includes a snubber circuit 8. The snubber circuit 8 is connected in parallel with the digital output interface circuit 2 and is connected to the external drive power supply 5 to clamp the voltage across the digital output interface circuit 2 within the safe operating voltage range.

[0049] Specifically, the actuating device, as a load, is mainly divided into an inductive load and a resistive load. In this embodiment, by setting the snubber circuit, the current can be quickly discharged, reducing the back electromotive force generated by the load (especially the inductive load) when powered off and eliminating the voltage spike. By setting the snubber circuit, the digital output interface circuit can operate within a reasonable voltage range, thereby protecting the circuit and preventing it from being damaged, and thus meeting the control requirements for actuating devices of different load types.

[0050] Each digital output of the digital control module in this embodiment can meet the requirements of inductive and resistive loads for drive current, that is, it can drive both resistive and inductive actuating devices. For multiple types of digital output interface circuits, snubber circuits can be set for the external drive power supply and the internal drive power supply corresponding to each type of digital output interface circuit to be compatible with resistive and inductive loads.

[0051] Through experiments, by using the digital control module of the present application, the drive current of each digital output of the digital output interface circuit can reach 8A, transiently reach 20A, and maintain for 100 ms. The parallel output current of N channels is N * 8A and maintains for 100 ms.

[0052] According to an embodiment of the present utility model, in addition to the data processing system and the digital output interface circuit, the digital control module further includes an external connector 9 。 The digital output interface circuit is connected to the actuating device through the external connector to control the actuating device.

[0053] The digital control module of this embodiment can use external connectors of models J30 - 86ZKW and J30 - 15ZKW.

[0054] According to an embodiment of the present utility model, in addition to the data processing system and the digital output interface circuit, the digital control module further includes an isolation acquisition circuit. The isolation acquisition circuit is connected to the digital output interface circuit and the data processing system to acquire the output signal of the digital output interface circuit and transmit it to the data processing system.

[0055] In this embodiment, an internal drive power supply is provided at the input end of the digital input / output (DI / O) interface circuit, and is connected to one end of the anti-backflow circuit and the anti-peaking circuit. The output end of the DI / O interface circuit is connected to the other end of the anti-peaking circuit, the external connector, and the isolation acquisition circuit 10. The output end of the DI / O interface circuit is used to output a digital output signal to the external connector and the isolation acquisition circuit, and the isolation acquisition circuit transmits the acquired signal to the data processing system. Through the isolation acquisition circuit, the digital control module can collect the output state of the digital output interface circuit, so that the data processing system can timely know the fault point and perform corresponding error correction.

[0056] According to an embodiment of the present invention, it includes a plurality of digital output interface circuits that are redundant to each other.

[0057] According to an embodiment of the present invention, the data processing system includes an FPGA, and the FPGA is used to process the input signal.

[0058] In this embodiment, the FPGA can not only realize communication transceiver, but also realize functions such as information interaction, protocol parsing, and packaging of the processor chip. By adopting the FPGA, the integration degree of the module is improved, and the volume of the processor chip and the corresponding peripheral hardware circuit is reduced. The FPGA can select XC7A100 of the A7 series of Xilinx Corporation, and select the PCIE bus as the internal bus. Its internal bus interface circuit has only 2 capacitors, with low hardware cost, and the bandwidth can reach 2.5 Gb / s.

[0059] According to an embodiment of the present invention, the data processing system includes a tertiary power supply to supply power to the data processing system and the digital output interface circuit.

[0060] In this embodiment, the tertiary power supply can select TPS7A8901RTJR to output the tertiary power supplies MGTAVCC1.0 and MGTAVTT1.2, or select LTM4644 to output the power supplies 1.0V, 1.8V, and 3.3V.

[0061] According to an embodiment of the present invention, it includes a plurality of isolation acquisition circuits 10 that are redundant to each other.

[0062] Those skilled in the art can understand that each component of the digital control module of the present invention can be redundantly designed to improve the reliability of the module.

[0063] For example, the data processing system is 3 - redundant, the digital output interface circuit is 5 - redundant, and the isolation acquisition circuit is 3 - redundant.

[0064] The relevant process of the digital control module of the present invention for controlling the digital output is as follows: Figure 3As shown in the figure, the control command data of 32 digital inputs are sent to three redundant FPGAs respectively through three redundant bus communication interfaces. In the FPGA, according to the communication receiving protocol, the command data is parsed, and the command data is transmitted to the other two redundant FPGAs through radio communication, and compared with the command data transmitted by the other two redundant channels. The "two out of three" decision is output to the digital output control unit for processing, and a control signal is output to the digital output interface circuit. Five control signals jointly control the digital output interface circuit, and the generated digital output signal controls the state of the actuator.

[0065] Verified by experiments, as Figure 4 shown in the figure, at the moment when the digital output interface circuit is connected, the digital output signal quickly reaches the voltage of the drive power supply and quickly provides drive current to the solenoid valve. The suction response time of the solenoid valve is about 12 ms. As Figure 5 shown in the figure, at the moment when the digital output interface circuit is disconnected, the digital output signal can start to discharge the back electromotive force of the solenoid valve through the snubber circuit, so that the maximum back electromotive force voltage does not exceed 51 V, and can quickly recover to 0 within 20 ms, completely disconnecting the drive power supply from the solenoid valve. The release response time of the solenoid valve is about 15 ms. As Figure 6 shown in the figure, at the moment when the digital output interface circuit is connected, the digital output signal quickly reaches the voltage of the drive power supply within 2 μs and quickly provides drive current to a 2 A resistive load. As Figure 7 shown in the figure, at the moment when the digital output interface circuit is disconnected, the digital output signal can quickly recover to 0 within 3 μs, completely disconnecting the drive power supply from the 2 A resistive load.

[0066] The relevant process of controlling the digital output acquisition signal is as follows: As Figure 8As shown in the figure, the external controller 11 outputs a 5V digital voltage signal and a communication signal, which are transmitted to the three redundant data processing systems through the internal connector. The three redundant data processing systems respectively generate three power supplies of 3.3V, 1.0V, 1.2V, 1.5V, 1.2VP, and 1.0VP with the corresponding 5V digital voltage signals for the corresponding data processing systems, digital output interface circuits, and isolation acquisition circuits, and parse the received communication signal, outputting 32 control signals in three redundancies to the digital control signals. The 32 control signals in three redundancies jointly control the switch states of the digital output interface circuits. For example, the data processing system of redundancy 1 controls the digital output interface circuits of redundancy 1 and redundancy 2, the data processing system of redundancy 2 controls the digital output interface circuits of redundancy 3 and redundancy 4, and the data processing system of redundancy 3 controls the digital output interface circuit of redundancy 5. The digital output interface circuit can output 32 digital output signals. The 32 digital output signals can be divided into three parts and are respectively connected to the isolation acquisition circuits in three redundancies and are transmitted by the isolation acquisition circuits to the FPGA of the data processing system. The FPGA filters the acquisition signals output by the isolation acquisition circuit to obtain acquisition data. On the one hand, the acquisition data can be transmitted to the FPGAs of the other two redundancies through radio communication. On the other hand, the command data transmitted by the three redundant FPGAs are compared, and a "two-out-of-three" decision is output. After passing through the communication sending protocol, it is packed into the bus communication interface circuit to be transmitted to the controller (for example, the external controller).

[0067] The digital control module of the present utility model can realize data exchange, redundant 32-way switch output control, and 32-way output state acquisition on a printed circuit board with a 6U size. Compared with the traditional design, the number of switch output channels of this digital control module has doubled, and it can control different actuating devices, with flexible use and stronger versatility.

[0068] The above embodiments of the present utility model can be combined with each other and have corresponding technical effects.

[0069] The above are only the preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present utility model shall be included in the protection scope of the present utility model.

Claims

1. A universal switch quantity control module, characterized in that: include: Data processing system and switch output interface circuit; The data processing system is connected to the switch output interface circuit, and the switch output interface circuit is connected to the actuator; the data processing system is used to generate a control signal and transmit it to the switch output interface circuit to control the actuator by controlling the switch state of the switch output interface circuit.

2. The switch quantity control module according to claim 1, characterized in that: It comprises a plurality of types of switch output interface circuits, which are respectively connected to different external drive power supplies to adaptively control different actuating devices.

3. The switch quantity control module according to claim 1, characterized in that: It also includes an anti-backfeed circuit and an internal driving power supply; the external driving power supply is connected to the switching value output interface circuit through the internal driving power supply to supply power to the switching value output interface circuit; The anti-backfeed circuit is arranged between the external driving power supply and the internal driving power supply to prevent the external driving power supply from being backfeeded.

4. The switch quantity control module according to claim 1, characterized in that: It also includes a peak-reverse elimination circuit, which is connected in parallel with the switch output interface circuit and is connected to an external drive power supply to clamp the voltage at both ends of the switch output interface circuit within a safe operating voltage range.

5. The switch quantity control module according to claim 1, characterized in that: It also includes an external connector, and the switch output interface circuit is connected to the actuating device through the external connector to control the actuating device.

6. The switch quantity control module according to claim 1, characterized in that: It also includes an isolation acquisition circuit, which is connected to the switch output interface circuit and the data processing system to acquire the output signal of the switch output interface circuit and transmit it to the data processing system.

7. The switch quantity control module according to claim 1, characterized in that: It includes a plurality of switch output interface circuits which are redundant with each other.

8. The switch quantity control module according to claim 1, characterized in that: The data processing system comprises an FPGA, and the FPGA is used to process an input signal.

9. The switch quantity control module according to claim 1, characterized in that: The data processing system includes a tertiary power supply to supply power to the data processing system and the switch output interface circuit.

10. The switch quantity control module according to claim 6, characterized in that: The invention comprises a plurality of isolation acquisition circuits which are redundant with each other.

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