Data acquisition device and data acquisition system suitable for strong interference electromagnetic environment

Abstract

The invention provides a data acquisition device and a data acquisition system suitable for a strong interference electromagnetic environment. The data acquisition device comprises a shielding shell provided with an accommodating cavity, and a data acquisition circuit structure and an optical fiber input and output structure which are arranged in the accommodating cavity, a first opening, a second opening and a third opening are formed in the shielding shell; the data acquisition circuit structure adopts a multi-layer circuit board framework in the accommodating cavity, and an analog signal shielding access interface of the data acquisition circuit structure penetrates out of the first open hole and is connected with detection equipment; a power input shielding interface of the data acquisition circuit structure is aligned with the second opening; and the optical fiber input and output structure is connected with the data acquisition circuit structure through the third opening. According to the invention, through various shielding designs, the shielding performance in an electromagnetic environment and the reliability of data acquisition are improved, and through the data acquisition circuit structure, the accuracy of sampling signals is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of data acquisition, and in particular to a data acquisition device and a data acquisition system suitable for a strong interference electromagnetic environment. Background Art

[0002] Magneto-inertial confinement fusion (MIF) is a controlled nuclear fusion technology whose equipment operates in an electromagnetic environment involving high voltage and high current. In this environment, existing data acquisition devices for diagnosing, collecting, analyzing, and processing various physical parameters face significant limitations in terms of electromagnetic shielding, spatial interference, signal loss, and safety isolation. Summary of the Invention

[0003] In view of the above-mentioned shortcomings of the prior art, the technical problem to be solved by the present invention is to provide a data acquisition device and a data acquisition system suitable for strong interference electromagnetic environments, so as to solve the problem of limitations of the data acquisition devices in the prior art in terms of electromagnetic shielding.

[0004] In order to solve the above technical problems, the present invention provides a data acquisition device suitable for a strong interference electromagnetic environment, which is used to connect a detection device, including: a shielding shell, a accommodating cavity is provided in the shielding shell, and a first opening, a second opening and a third opening are respectively provided on the shielding shell; a data acquisition circuit structure, the data acquisition circuit structure is arranged on a multi-layer circuit board structure located in the accommodating cavity, and includes: an analog signal shielding access interface and a power input shielding interface; wherein the analog signal shielding access interface passes through the first opening for connecting to the detection device; the power input shielding interface is aligned with the second opening; an optical fiber input and output structure, the optical fiber input and output structure is connected to the data acquisition circuit structure through the third opening.

[0005] In one embodiment of the present invention, the data acquisition circuit structure also includes: an amplifier, an analog-to-digital converter and an FPGA module connected in sequence; the FPGA module is also respectively connected to a DDR memory module, a clock input optical interface, a synchronization input optical interface and a trigger input optical interface.

[0006] In one embodiment of the present invention, the multi-layer circuit board structure is composed of a plurality of circuit boards arranged sequentially in a vertical direction.

[0007] In one embodiment of the present invention, the clock input optical interface, the synchronization input optical interface, and the trigger input optical interface are respectively connected to the clock source, the synchronizer, and the trigger through the optical fiber input and output structure.

[0008] In one embodiment of the present invention, the clock signals of the clock source, the synchronizer and the trigger are of the same source.

[0009] In one embodiment of the present invention, the optical fiber input and output structure includes: an optical fiber and an optical fiber shielding connector; wherein the types of the optical fiber shielding connector include: a shielded waveguide tube and a shielded connector.

[0010] In one embodiment of the present invention, the power input shielded interface is connected to the power supply through a shielded cable; wherein the power supply is powered by a battery or an isolated mains conversion power supply.

[0011] In one embodiment of the present invention, the data acquisition circuit structure further includes an MCU processor for controlling the operation or sleep of the data acquisition circuit structure.

[0012] In one embodiment of the present invention, the analog signal shielding access interface is connected to the detection device in any one of the following ways: direct connection, connection through a three-coaxial shielded cable.

[0013] Similar to the above embodiment, the present invention also provides a data acquisition system, comprising: a device to be tested, one or more detection devices, and the same number of data acquisition devices as the detection devices as described above, which are suitable for a strong interference electromagnetic environment; wherein each detection device is connected one-to-one with each data acquisition device; each data acquisition device is respectively connected to a routing device; each routing device is respectively connected one-to-one with each data controller located in a shielded room; and each data controller is respectively connected to a data terminal.

[0014] As described above, the data acquisition device and data acquisition system of the present invention, which are suitable for strong interference electromagnetic environment, have the following features:

[0015] Beneficial effects:

[0016] The present invention improves the shielding performance and data acquisition reliability in an electromagnetic environment through multiple shielding designs, and the distributed layout of the data acquisition circuit structure adopted by the present invention improves the accuracy of the sampling signal. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 Shown is a schematic diagram of the external structure of the data acquisition device suitable for strong interference electromagnetic environment of the present invention;

[0018] Figure 2 A cross-sectional view of one side of the data acquisition device of the present invention suitable for use in a strong electromagnetic interference environment;

[0019] Figure 3 Shown is a cross-sectional view of the other side of the data acquisition device applicable to a strong interference electromagnetic environment according to the present invention;

[0020] Figure 4Shown is a functional diagram of the data acquisition circuit structure of the present invention;

[0021] Figure 5 Shown is a schematic application block diagram of the data acquisition system of the present invention.

[0022] Component marking instructions

[0023] 1 Shielding housing

[0024] 11. Accommodation cavity

[0025] 12 First opening

[0026] 13 Second opening

[0027] 14 Third opening

[0028] 2 Data acquisition circuit structure

[0029] 21 Analog signal shielding access interface

[0030] 22 Power input shielding interface

[0031] 23 Clock input optical interface

[0032] 24 fiber optic interface

[0033] 25 Synchronous input optical interface

[0034] 26 Trigger input optical interface

[0035] 3 Fiber input and output structure

[0036] 31 Fiber Optic

[0037] 32 Shielded waveguide

[0038] 4 Multilayer PCB structure

[0039] 41 Circuit Board DETAILED DESCRIPTION

[0040] The following describes the implementation of the present invention through specific embodiments. People skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification.

[0041] It should be noted that the structures, proportions, sizes, etc. illustrated in the drawings of this specification are only used to match the contents disclosed in the specification for people familiar with this technology to understand and read, and are not used to limit the conditions for implementation of the present invention. Therefore, they have no substantial technical significance. Any modification of the structure, change in the proportional relationship or adjustment of the size should still fall within the scope of the technical content disclosed by the present invention without affecting the efficacy and purpose of the present invention. At the same time, the terms such as "upper", "lower", "left", "right", "middle" and "one" quoted in this specification are only for the convenience of description and are not used to limit the scope of implementation of the present invention. Changes or adjustments in their relative relationships should also be regarded as the scope of implementation of the present invention without substantially changing the technical content.

[0042] In the present invention, unless otherwise expressly specified or limited, terms such as "mounted," "connected," "connect," "fixed," and "holding" should be understood broadly. For example, they may refer to fixed, detachable, or integral connections; mechanical or electrical connections; direct or indirect connections through an intermediary; and internal communication between two components. Those skilled in the art will understand the specific meanings of these terms in the present invention based on specific circumstances.

[0043] Furthermore, as used herein, the singular forms "a", "an", and "the" are intended to include the plural forms as well, unless the context indicates otherwise. It should be further understood that the terms "comprise", "include" indicate the presence of the described features, operations, elements, components, items, kinds, and / or groups, but do not exclude the presence, occurrence, or addition of one or more other features, operations, elements, components, items, kinds, and / or groups. The terms "or" and "and / or" used herein are interpreted as inclusive, or mean any one or any combination. Thus, "A, B, or C" or "A, B, and / or C" means "any of the following: A; B; C; A and B; A and C; B and C; A, B, and C". Exceptions to this definition occur only when the combination of elements, functions, or operations is inherently mutually exclusive in some way.

[0044] like Figures 1 to 3 As shown, the present invention provides a data acquisition device suitable for strong interference electromagnetic environment.

[0045] The data acquisition device suitable for strong interference electromagnetic environment is used to connect to the detection equipment, including:

[0046] Shielding shell 1, data acquisition circuit structure 2 and optical fiber input and output structure 3;

[0047] The shielding shell 1 is provided with a receiving cavity 11, and the shielding shell 1 is provided with a first opening 12, a second opening 13 and a third opening 14;

[0048] The data acquisition circuit structure 2 is disposed on the multi-layer circuit board structure 4 within the housing cavity 11 and includes an analog signal shielding access interface 21 and a power input shielding interface 22. The analog signal shielding access interface 21 extends through the first opening 12 for connection to a detection device; the power input shielding interface 22 is aligned with the second opening 13.

[0049] The optical fiber input and output structure 3 is connected to the data acquisition circuit structure 2 through the third opening 14 .

[0050] It should be noted that through the shielding design of the shielded shell 1, the analog signal shielded access interface 21, the power input shielded interface 22 and the optical fiber input and output structure 3, the data acquisition device can be installed in a strong interference electromagnetic environment, thereby improving the shielding performance of the data acquisition device in the electromagnetic environment and the reliability of data acquisition.

[0051] In one embodiment, the types of detection devices include diagnostic devices and sensors. The diagnostic devices or sensors are used to detect the device to be tested.

[0052] In one embodiment, the device under test is a magnetic-inertial confinement fusion energy system. It should be understood that the magnetic-inertial confinement fusion energy system (MIF) is an innovative fusion energy system that combines the characteristics of both magnetic confinement and inertial confinement nuclear fusion technologies.

[0053] In one embodiment, the shielding material of the shielding shell is preferably nickel-iron alloy (Permalloy). It should be noted that nickel-iron alloy has the best shielding performance. Those skilled in the art may also use other metal materials with shielding functions as the shielding material of the shielding shell, and the present invention is not limited to this.

[0054] In one embodiment, if Figure 4 As shown, the data acquisition circuit structure also includes: an amplifier (AMP), an analog-to-digital converter (ADC), and an FPGA module connected in sequence; the FPGA module is also connected to a DDR memory module, a clock input optical interface (Clock), a synchronous input optical interface (Synchronous), and a trigger input optical interface (Trigger). Specifically, the amplifier is also connected to an analog signal shielded access interface (Signal Input). The FPGA module is an FPGA chip. The DDR memory module includes DDR memory, and the DDR memory module must meet the data processing requirements of the acquisition system. The FPGA module is also connected to a fiber optic interface (SFP).

[0055] In one embodiment, the clock input optical interface, synchronization input optical interface, and trigger input optical interface are respectively connected to the clock source, synchronizer, and trigger via an optical fiber input and output structure. Specifically, the clock input optical interface is connected to the clock source via optical fiber, and the clock signal generated by the clock source is transmitted to the clock input optical interface via optical fiber; the synchronization input optical interface is connected to the synchronizer via optical fiber, and the synchronization signal generated by the synchronizer is transmitted to the synchronization input optical interface via optical fiber; and the trigger input optical interface is connected to the trigger via optical fiber, and the trigger signal generated by the trigger is transmitted to the trigger input optical interface via optical fiber. It should be noted that the optical fiber transmission electrically isolates the data acquisition circuit structure from the clock source, synchronizer, and trigger, preventing strong interference signals from damaging the clock source, synchronizer, trigger, and power supply.

[0056] In one embodiment, the clock signals of the clock source, synchronizer, and trigger are derived from the same source. It should be noted that the clock signals of the clock source, synchronizer, and trigger are derived from the same source or master clock. This ensures that the clock source, synchronizer, and trigger maintain acquisition synchronization within 1 ns.

[0057] In one embodiment, the clock input optical interface, the synchronization input optical interface, and the trigger input optical interface all use shielded fiber optic connectors to achieve shielding of each interface. It should be understood that a shielded fiber optic connector is a connector that combines fiber optic transmission and electromagnetic shielding (EMI / RFI shielding) technology to ensure high-reliability transmission of optical signals in harsh electromagnetic environments.

[0058] In one embodiment, the optical fiber input and output structure includes: an optical fiber and an optical fiber shielding connector; wherein the optical fiber passes through the optical fiber shielding structure; the types of optical fiber shielding connectors include: a shielded waveguide tube and a shielded connector. It should be understood that a shielded waveguide tube is a metal tubular structure used to transmit electromagnetic waves (especially in the microwave frequency band) and has the ability to shield external electromagnetic interference (EMI). For example, the shielded connector can adopt the EEG-0B series connector, which has a high shielding function. For another example, Figures 1 to 3 An optical fiber input and output structure is shown, including: an optical fiber 31 and a shielding waveguide tube 32; wherein the optical fiber 31 passes through the shielding waveguide tube 32.

[0059] In one embodiment, the analog signal shielded access interface uses a triaxial connector; the analog signal shielded access interface is directly connected to the detection equipment or connected via a triaxial shielded cable. It should be noted that if there is sufficient space near the detection equipment, the data acquisition device can be directly connected to the detection equipment via the analog signal shielded access interface; if there is insufficient space near the diagnostic equipment, the data acquisition device can be connected to the detection equipment via a triaxial shielded cable of the shortest length. It should be noted that direct connection can reduce the loss of the cable to the collected signal and improve the accuracy of the collected signal. Therefore, direct connection is preferred when there is sufficient space.

[0060] In one embodiment, if Figure 4 As shown in the figure, the specific working process of the data acquisition circuit includes:

[0061] The data acquisition device is installed near the testing equipment, maintaining synchronized triggering and data acquisition. When triggered by a trigger signal, the various parameters of the testing equipment are input into the analog signal shield access interface in the form of single-ended / differential analog voltage signals, and then into the data acquisition circuit structure. After the analog voltage signal is amplitude-adjusted (amplified or attenuated) by an amplifier (AMP), it is sampled and converted by an analog-to-digital converter (ADC), processed by an FPGA, and then converted into an optical digital signal via a fiber optic interface (SFP) for transmission to servers, host computers, storage units, and other devices in the shielded room (control room) for reception, processing, and display.

[0062] It should be noted that the signal flow of each data acquisition device is single-channel, which ensures electromagnetic isolation between the data acquisition devices and avoids mutual interference between channels.

[0063] In one embodiment, if Figure 2 as well as Figure 3 As shown, the multi-layer circuit board structure 4 is composed of multiple circuit boards 41 arranged in a vertical sequence. Specifically, the number of circuit boards is generally three. The various electrical components in the data acquisition circuit structure are respectively arranged on different circuit boards to jointly implement the data acquisition circuit structure. For example, the analog signal shielded access interface, amplifier, fiber optic interface, and synchronization input optical interface are arranged on the top circuit board, the analog-to-digital converter and trigger input optical interface are arranged on the middle circuit board, and the FPGA module, DDR memory module, clock input optical interface, and power input shielded interface are arranged on the bottom circuit board.

[0064] It should be noted that placing the data acquisition circuit structure on a multi-layer circuit board minimizes the size of the data acquisition device (volume no greater than 500 cubic centimeters, single-side dimension no greater than 10 centimeters), making it suitable for installation in small spaces. This allows for direct connection to detection equipment, reduces analog signal cable losses, and improves signal acquisition accuracy. It should also be noted that the present invention does not specify the electrical components of each circuit board within the multi-layer circuit board; those skilled in the art can determine these based on actual needs.

[0065] In one embodiment, the circuit board where the FPGA module resides should be located within the shielding enclosure in a position that facilitates heat dissipation. For example, the circuit board where the FPGA module resides can be located on the topmost circuit board near the top of the shielding enclosure or on the bottommost circuit board near the bottom of the shielding enclosure.

[0066] In one embodiment, the power input shielding interface is connected to the power supply through a shielded cable; wherein, the power supply is powered by a battery or an isolated AC-DC power supply to reduce damage to the AC power. The power supply is isolated by a transformer or the like. The shielded cable is a power cable with a shielding layer. At the second opening, the shielding shell is well connected to the shielding layer of the shielded cable. It should be understood that an isolated AC-DC power supply is a power supply device that converts AC power (AC power, such as 220V / 50Hz or 110V / 60Hz) isolated by a transformer into a safe and stable DC power (such as 5V, 12V, 24V, etc.).

[0067] In one embodiment, types of the power input shielding interface include: a shielded waveguide and a shielded connector.

[0068] In one embodiment, the housing of the power supply and the shielding layer of the shielded cable are grounded at the same time.

[0069] In one embodiment, the data acquisition circuit structure further includes an MCU processor for controlling the operation or sleep (non-operation) of the data acquisition circuit structure, thereby reducing the power consumption of the data acquisition device and optimizing the heat dissipation design. Specifically, the MCU processor is provided with a program to control the operation or sleep of the data acquisition circuit structure. It should be noted that the program provided in the MCU processor can be an existing program for controlling operation or sleep.

[0070] It should be noted that the present invention improves the shielding performance and data acquisition reliability in strong electromagnetic environments through various shielding designs such as nickel-iron alloy shielding shell design, triaxial shielded cable, power shielded cable, and shielded connector;

[0071] Clock input, synchronization input, trigger input, and digital signal optical interface transmission realize electrical isolation between data acquisition device and mains equipment;

[0072] Use isolated power supply or battery power design to achieve electrical isolation between the data acquisition device and the mains;

[0073] Each data acquisition device is designed as a single channel to achieve electrical isolation between multi-channel data acquisition devices, avoiding the influence of mutual interference between channels (such as common ground design, etc.);

[0074] The data acquisition device is designed to be minimized in size, adopts distributed installation, and is directly connected to the detection equipment, reducing the loss introduced by the cables and connectors of the analog signal and improving the accuracy of the collected signal.

[0075] Similar to the above embodiment, Figure 5 As shown, the present invention also provides a data acquisition system, comprising:

[0076] A device to be tested, one or more detection devices, and the same number of data acquisition devices as the detection devices as described above, which are suitable for a strong interference electromagnetic environment; wherein each detection device is connected one-to-one with each data acquisition device; each data acquisition device is respectively connected to a routing device; each routing device is connected one-to-one with each data controller located in a shielded room; and each data controller is respectively connected to a data terminal.

[0077] It should be understood that the specific structure and function of the data acquisition device have been described in the above embodiments and will not be repeated here.

[0078] Specifically, such as Figure 5 As shown, the device to be tested is a magnetic-inertial confinement fusion energy system. One or more detection devices are used to detect the magnetic-inertial confinement fusion energy system. Each detection device is connected to each data acquisition device in a one-to-one correspondence. The magnetic-inertial confinement fusion energy system, detection equipment, data acquisition device, clock source, synchronizer and trigger are all placed in a laboratory. There is strong electromagnetic radiation in the laboratory. The digital signal output by each data acquisition device is transmitted to the routing device (router) via optical fiber, and then transmitted to the data terminal (the data terminal is generally a computer) through the data controller located in the shielded room. It should be understood that the data controller is mainly responsible for managing and controlling the access, use and storage of data.

[0079] In one embodiment, the sampling rates / bandwidths of the data acquisition devices are different.

[0080] In summary, the present invention provides a data acquisition device and a data acquisition system suitable for use in a strong-interference electromagnetic environment. The data acquisition device comprises: a shielded shell provided with a housing cavity, a data acquisition circuit structure and an optical fiber input-output structure provided in the housing cavity; a first opening, a second opening and a third opening are provided on the shielded shell; the data acquisition circuit structure adopts a multi-layer circuit board structure in the housing cavity, and the analog signal shielding access interface of the data acquisition circuit structure passes through the first opening and is connected to the detection equipment; the power input shielding interface of the data acquisition circuit structure is aligned with the second opening; the optical fiber input-output structure is connected to the data acquisition circuit structure through the third opening. The present invention improves the shielding performance and data acquisition reliability in an electromagnetic environment through a variety of shielding designs and isolation designs, and the data acquisition circuit structure of the present invention improves the accuracy of the sampling signal. Therefore, the present invention effectively overcomes the various shortcomings of the prior art and has a high industrial utilization value.

[0081] The above embodiments are merely illustrative of the principles and effects of the present invention and are not intended to limit the present invention. Anyone skilled in the art may modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by one of ordinary skill in the art without departing from the spirit and technical principles disclosed herein are intended to be covered by the claims of the present invention.

Claims

1. A data acquisition device suitable for strong interference electromagnetic environment, characterized in that: Used to connect testing equipment, including: A shielding shell, wherein a receiving cavity is provided in the shielding shell, and a first opening, a second opening, and a third opening are respectively provided on the shielding shell; A data acquisition circuit structure is provided on a multi-layer circuit board structure located within the accommodating cavity, and includes: an analog signal shielding access interface and a power input shielding interface; wherein the analog signal shielding access interface extends through the first opening for connection to a detection device; and the power input shielding interface is aligned with the second opening; An optical fiber input and output structure is connected to the data acquisition circuit structure through the third opening.

2. The data acquisition device suitable for strong interference electromagnetic environment according to claim 1, characterized in that: The data acquisition circuit structure also includes: an amplifier, an analog-to-digital converter and an FPGA module connected in sequence; the FPGA module is also connected to a DDR memory module, a clock input optical interface, a synchronization input optical interface and a trigger input optical interface respectively.

3. The data acquisition device suitable for strong interference electromagnetic environment according to claim 2, characterized in that: The multi-layer circuit board structure is composed of a plurality of circuit boards arranged in sequence in a vertical direction.

4. The data acquisition device suitable for strong interference electromagnetic environment according to claim 2, characterized in that: The clock input optical interface, the synchronization input optical interface and the trigger input optical interface are respectively connected to the clock source, the synchronizer and the trigger machine through the optical fiber input and output structure.

5. The data acquisition device suitable for strong interference electromagnetic environment according to claim 4, characterized in that: The clock signals of the clock source, the synchronizer and the trigger are of the same origin.

6. The data acquisition device suitable for strong interference electromagnetic environment according to claim 4, characterized in that: The optical fiber input and output structure includes: an optical fiber and an optical fiber shielding connector; wherein the types of the optical fiber shielding connector include: a shielded waveguide tube and a shielded connector.

7. The data acquisition device suitable for strong interference electromagnetic environment according to claim 1, characterized in that: The power input shielding interface is connected to the power supply through a shielded cable; wherein, the power supply is powered by a battery or an isolated mains conversion power supply.

8. The data acquisition device suitable for strong interference electromagnetic environment according to claim 1, characterized in that: The data acquisition circuit structure also includes an MCU processor for controlling the data acquisition circuit structure to work or sleep.

9. The data acquisition device suitable for strong interference electromagnetic environment according to claim 1, characterized in that: The analog signal shielding access interface is connected to the detection device in any one of the following ways: direct connection, connection via a three-coaxial shielded cable.

10. A data acquisition system, characterized in that: include: A device to be tested, one or more detection devices, and a data acquisition device suitable for a strong interference electromagnetic environment as described in any one of claims 1 to 9, the number of which is the same as that of the detection devices; wherein each detection device is connected to each data acquisition device in a one-to-one correspondence; each data acquisition device is respectively connected to a routing device; each routing device is connected to each data controller located in a shielded room in a one-to-one correspondence; and each data controller is respectively connected to a data terminal.

Images