Remote signal acquisition system of high-power pulse source

Abstract

The utility model discloses a remote signal acquisition system of a high-power pulse source, belongs to the technical field of pulse power monitoring devices, and solves the technical problems that a high-power pulse source acquisition system is dispersed in layout, easy to be interfered by a strong electromagnetic field, low in operation efficiency and inconvenient in data processing. The system comprises a signal processor, a signal acquisition module, a signal conditioning module, a communication module A, a communication module B, a system power supply unit, a shielding cavity and a remote control unit. The signal processor, the signal acquisition module, the signal conditioning module, the communication module A, a power supply of the system power supply unit and the air pressure switch are located in the shielding cavity, the shielding cavity is installed on a tested pulse source device, and the remote control unit, the communication module B and an air source of the system power supply unit are located at a remote control end. The communication module A and the communication module B are connected through an optical fiber. The high-power pulse source remote signal acquisition device is used for high-power pulse source remote signal acquisition.

Description

Technical Field

[0001] The utility model belongs to the technical field of pulse power monitoring devices, and in particular relates to a remote signal acquisition system for a high-power pulse source. Background Art

[0002] High-power pulse source status monitoring is a crucial step in pulse source commissioning and operation. However, its operation is often accompanied by the generation of strong electromagnetic fields, which can affect and interfere with signal measurement and acquisition systems. Furthermore, due to the presence of strong electromagnetic fields, testers often need to control the operation of the pulse source in a shielded room. Currently, there are two main approaches to high-power pulse source signal acquisition. One approach is to place all benchtop oscilloscopes used for signal acquisition in a well-shielded measurement room. Each signal to be measured is connected from the device end to the measurement end via a shielded coaxial cable, and oscilloscope parameter configuration and data storage are completed at the measurement end. The other approach is to set up a dedicated shielded cabinet at the device end. A shielded coaxial cable is passed through the cabinet to connect to the benchtop oscilloscope inside. The measurement data is temporarily stored on the oscilloscope, and testers can manually modify the oscilloscope settings after each measurement.

[0003] Both of these acquisition methods can avoid the impact of strong electromagnetic fields on measurement equipment and personnel, but they still have many shortcomings. First, high-power pulse sources have a large number of signals to be measured, requiring multiple desktop oscilloscopes to operate simultaneously. The first method requires the layout of multiple long cables, which is cumbersome to connect, and the cables undergo multiple transfers, increasing the failure rate of the acquisition system. The second method is not suitable for pulse sources operating at high repetition rates, making it impossible to monitor the operating status of the acquisition system in real time. It also requires the design of a large shielded cabinet to accommodate enough oscilloscopes. In addition, the wiring between the acquisition system and the pulse source may couple large currents in the presence of strong electromagnetic fields, damaging the acquisition equipment. If the high-power pulse source is moved, the wiring may also need to be rearranged. The above acquisition methods also have problems such as a dispersed layout that makes maintenance difficult, low operational efficiency, and inconvenient data storage and backtracking. Utility Model Content

[0004] In order to overcome the shortcomings of high-power pulse source acquisition systems, such as dispersed layout, susceptibility to strong electromagnetic field interference, low operating efficiency, and inconvenient data processing, the utility model proposes a remote signal acquisition system for high-power pulse sources.

[0005] The technical solution adopted by the utility model to solve its technical problems is:

[0006] A remote signal measurement system for a high-power pulse source includes a signal processor, a signal acquisition module, a signal conditioning module, a communication module A, a communication module B, a system power supply unit, a shielding cavity, and a remote control unit;

[0007] The remote signal measurement system of the high-power pulse source adopts an independent power supply unit;

[0008] The shielding cavity is directly installed on the device under test without affecting the airtightness and normal operation of the original device; the shielding cavity also takes into account the convenience of installation and maintenance.

[0009] The signal processor, signal acquisition module, signal conditioning module, communication module A, and system power supply unit are installed inside the shielding cavity; the remote control unit and communication module B are located at the remote control end, converting the collected electrical signals and instructions from the control end into optical signals through a standard communication interface, and transmitting them to the remote control unit and signal processor for processing through optical fibers respectively.

[0010] The remote control unit controls the reset and restart of the acquisition system through remote control software and signal processor software, completes the search and configuration of the signal acquisition module, as well as the display, reading, and saving of the acquired data, and real-time monitors the power of the system power supply unit and the online status of the signal acquisition module.

[0011] The system power supply unit includes a power module, a DC voltage stabilization module, a power monitoring module, and an air pressure switch, which supplies power to modules such as the signal acquisition module, communication module A, and signal processor. At the same time, it reads the power of the power supply, coordinates with the remote control unit to control the power supply and power-off of the signal acquisition module and signal processor, and realizes remote power management.

[0012] The system power supply unit has the functions of remote charging and power-off.

[0013] The signal conditioning module performs necessary preprocessing on the input signal to meet the input requirements of the signal acquisition module.

[0014] Furthermore, the signal acquisition module uses a portable modular oscilloscope, which is small in size and convenient for remote collaborative control through software; the number of portable modular oscilloscopes can be adjusted according to the number of required signal acquisition channels.

[0015] Furthermore, the shielding cavity can be directly connected to the cavity of the device under test through a signal adapter board, and the airtightness and working pressure inside the cavity of the device under test are not affected by the shielding cavity.

[0016] Even further, the material of the shielding cavity is metal, and the two opposite sides can be completely opened, which is convenient for system installation and maintenance.

[0017] Furthermore, the remote control unit and the signal processor are respectively connected to the optical fiber through communication modules A and B, and communication is completed through a standard communication protocol; the remote control unit and communication module B, and the signal processor and communication module A are connected by a standard communication interface. The control instruction of the remote control unit is transmitted to communication module A through communication module B and the optical fiber, and the signal processor reads the instruction and completes operations such as parameter configuration of the signal acquisition module. Similarly, the signal processor reads the data of the signal acquisition module, transmits it to communication module B through communication module A and the optical fiber, and is processed by the remote control unit. Selecting an appropriate optical fiber can achieve a maximum communication distance of 10 km.

[0018] Furthermore, the signal processor reads the voltage of the power monitoring module in real time through the AD sampler, and then obtains the power status of the power supply.

[0019] The calculation method of the remaining power of the power supply is as follows: Under the condition of ensuring the normal working voltage of the AD sampler, the maximum sampling voltage of the AD sampler when the power supply is fully charged (denoted as U max ) and the minimum sampling voltage when the power supply is out of power (denoted as U min ) are recorded through multiple tests. Then, the percentage P t of the remaining power of the power supply can be calculated according to formula (1):

[0020]

[0021] In the formula, U t is the sampling voltage read by the AD sampler at a certain moment during the operation of the power supply of the remote signal acquisition system.

[0022] Furthermore, the starting pressure of the air pressure switch is set to P1. The inflation port of the air pressure switch is connected to the remote gas source through a trachea. When the gas pressure in the trachea is greater than P1, the air pressure switch closes, and the power supply starts to supply power to the signal acquisition module, the signal processor, etc.; when the gas pressure in the trachea is less than P1, the pressure switch disconnects, and the power supply stops supplying power. The gas source can be placed in a remote control room to remotely control the power on and off of the acquisition system.

[0023] Furthermore, a long-distance shielded cable is used to charge the power supply of the signal acquisition system to avoid coupling a large current in a strong electromagnetic field environment and affecting the acquisition system.

[0024] Furthermore, the system power supply unit includes a power supply module, a DC voltage stabilization module, a power monitoring module, and an air pressure switch, and supplies power to the signal acquisition module, communication module A, signal processor, and power monitoring module. If the working voltage is inconsistent with the power supply output voltage, the DC voltage stabilization module will perform voltage conversion; at the same time, the voltage stabilization module will also keep the power supply output voltage stable.

[0025] Furthermore, the signal processor uses an industrial computer with zero delay and has standard interfaces such as Ethernet and USB, facilitating communication.

[0026] Furthermore, the remote control software includes a capture card search unit, a parameter setting unit, a signal acquisition unit, a signal display and storage unit, and a system monitoring unit.

[0027] The capture card search unit scans the available capture modules in the system one by one; the parameter setting unit configures parameters such as capture channel information and data storage information; the signal acquisition unit realizes the data acquisition of signals; the signal display and storage unit displays the signal waveform and performs control operations at the remote control end, and saves the data to a file in a specified format; the system monitoring unit acquires and displays the states of the power supply and the signal processor.

[0028] The beneficial effects of the present utility model are as follows:

[0029] A remote signal measurement system for a high-power pulse source, combining a virtual oscilloscope and a signal processor, realizes the collaborative control of multiple virtual oscilloscopes of different models, improves the operation efficiency of the acquisition system; through reasonable layout and structural design, the acquisition system is made more compact. The improved system can be directly installed on the cavity of the high-power pulse source, facilitating overall movement and avoiding the influence of strong electromagnetic fields on the measurement cable. The system has a compact structure, is convenient for remote collaborative control, is easy to expand the acquisition channels, the acquired signals are not affected by electromagnetic fields, and is convenient for installation and maintenance, improving the work efficiency;

[0030] A remote signal acquisition system for a high-power pulse source can simultaneously complete the acquisition, transmission, and processing of the output signals of multiple pulse sources, is easy to expand the acquisition channels, has a compact structure, is convenient for installation and maintenance, and can move integrally with the pulse source;

[0031] A remote signal acquisition system for a high-power pulse source realizes the power-on and power-off of the acquisition system by remotely controlling an air pressure switch, and can supply power to the acquisition system according to actual needs, extending the working time of the system;

[0032] A remote signal acquisition system for a high-power pulse source adopts the method of independent power supply, an external shielding cavity, and optical fiber transmission to avoid the influence of strong electromagnetic fields on the acquisition system;

[0033] A remote signal acquisition system for a high-power pulse source remotely charges the acquisition system through a long-distance shielded cable, which is beneficial for charging the acquisition systems of pulse sources at different positions and heights;

[0034] A remote signal acquisition system for a high-power pulse source can realize the charging, startup, and power-off of the acquisition system at the remote control end, complete signal acquisition, protect the safety of operators, and improve the automation and work efficiency of the system;

[0035] A remote signal acquisition system for a high-power pulse source, and the acquired data is saved in a specified format to facilitate compatibility with a database for further processing and analysis. Description of the Drawings

[0036] Figure 1 It is a schematic structural diagram of the remote signal acquisition system according to an embodiment of the present utility model;

[0037] Figure 2 It is a three-dimensional layout diagram inside the shielding cavity of the present utility model;

[0038] Figure 3 It is a front view of the layout inside the shielding cavity of the present utility model;

[0039] Figure 4 It is a schematic diagram of the principle of the power monitoring module. Detailed Embodiments

[0040] The following further describes the present utility model in detail with reference to the drawings and specific embodiments.

[0041] Embodiment 1

[0042] As Figure 1 shown, a remote signal acquisition system for a high-power pulse source is composed of a signal processor, a signal acquisition module, a signal conditioning module, a communication module A, a communication module B, a system power supply unit, a shielding cavity, and a remote control unit;

[0043] The remote signal acquisition system for the high-power pulse source adopts an independent power supply unit;

[0044] The shielding cavity is directly installed on the device under test without affecting the airtightness and normal operation of the original device; the shielding cavity also considers the convenience of installation and maintenance;

[0045] The signal processor, the signal acquisition module, the signal conditioning module, the communication module A, and the system power supply unit are installed inside the shielding cavity; the remote control unit and the communication module B are located at the remote control end, and the acquired electrical signals and the instructions from the control end are converted into optical signals through a standard communication interface and transmitted to the remote control unit and the signal processor for processing through optical fibers respectively;

[0046] The remote control unit controls the reset and restart of the acquisition system through the remote control software and the signal processor software, completes the search and configuration of the signal acquisition module, as well as the display, reading, and saving of the acquired data, and real-time monitors the power of the system power supply unit of the acquisition system and real-time displays the online status of the signal acquisition module;

[0047] The system power supply unit includes a power module, a DC voltage stabilizing module, a power quantity monitoring module, and an air pressure switch, which supplies power to modules such as the signal acquisition module, communication module A, and signal processor. At the same time, it reads the power quantity of the power supply, coordinates with the remote control unit to control the power supply and power-off of the signal acquisition module and the signal processor, and realizes remote power management;

[0048] The system power supply unit has the functions of remote charging and power-off;

[0049] The signal of the signal source is transmitted to the signal conditioning module through the signal transfer board. The signal conditioning module preprocesses the received signal, and the preprocessed signal is transmitted to the signal acquisition module. The signal collected by the signal acquisition module is transmitted to the remote control unit through the signal processor, communication module A, and communication module B;

[0050] The signal conditioning module is used for preprocessing the signal of the signal source, and the preprocessed signal is transmitted to the signal acquisition module;

[0051] The signal conditioning module performs necessary preprocessing on the input signal to meet the input requirements of the signal acquisition module. In the measured pulse source, if there are N signals to be measured, N signal acquisition channels are required. If an oscilloscope acquisition card with M channels is selected as the signal acquisition module, the number of required oscilloscope acquisition cards is pieces.

[0052] Among them, N≥1, M≥1, and both N and M are integers. The symbol represents rounding up to the nearest integer.

[0053] In this embodiment, it is assumed that there are N = 12 signals to be measured in the measured pulse source, 12 signal acquisition channels are required, and a Pico 6404E high-speed oscilloscope acquisition card with M = 4 channels is selected as the signal acquisition module. Then the number of required oscilloscope acquisition cards is pieces. The signal acquisition is controlled by remote software.

[0054] As Figure 2 shown, the shielding cavity can be directly connected to the cavity of the device under test through a flange panel on one side. The interfaces of the signal acquisition module and the signal to be measured of the device are respectively connected to the gas-tight BNC connectors at the shielding cavity transfer board through shielded cables. The gas pressure inside the shielding cavity is normal pressure, and the airtightness and working pressure inside the cavity of the device under test are not affected by the shielding cavity; the shielding cavity is made of stainless steel metal material, and the two opposite sides can be completely opened, which is convenient for system installation and maintenance.

[0055] The remote control unit and the signal processor are respectively connected to the optical fiber through SFP optical transceivers. The remote control unit and the signal processor are connected to the SFP optical transceivers through Ethernet, and the communication between the remote control unit and the signal processor is realized through the TCP Socket communication protocol. Single-mode optical fiber is selected, and the maximum distance of communication module A and communication module B is 10 km. The maximum communication distance of the remote signal acquisition system in this embodiment is 10 km.

[0056] As Figure 3 shown, since the voltage and current signals of the high-power pulse source collected are relatively large, the signal conditioning module adopted in this embodiment is mainly an attenuator.

[0057] The signal processor reads the power supply voltage in real time through the AD sampler, and then obtains the power status of the power supply.

[0058] As Figure 4 shown, the calculation method of the remaining power of the power supply is as follows: The remote signal acquisition system is powered by a 12V power supply. Two resistors with resistance values of R1 = 1 kΩ and R2 = 15 kΩ are connected between the power supply and the AD sampler (model STM32 UARTADC module). The AD sampler is connected in parallel with the resistor R1, and the voltage finally reaching the AD sampler is 0.75V, ensuring that the AD sampler works within the normal voltage range.

[0059] By measuring multiple times and recording the maximum sampling voltage (denoted as U max = 0.82V) of the AD sampler when the power supply is fully charged, and the minimum sampling voltage (denoted as U min = 0.692V) when the power supply is out of power, the percentage P t of the remaining power of the power supply can be calculated according to formula (2):

[0060]

[0061] In the formula, U t is the sampling voltage read by the AD sampler at a certain moment during the operation of the power supply of the remote signal acquisition system.

[0062] The starting pressure of the air pressure switch is set to P1 = 0.3 MPa. The air inlet of the air pressure switch is connected to the remote air source through a gas pipe. When the gas pressure in the gas pipe is greater than P1, the air pressure switch closes, and the power supply supplies power to the signal acquisition module, the signal processor, etc.; when the gas pressure in the gas pipe is less than P1, the pressure switch disconnects, and the acquisition system is powered off. The air source is hundreds of meters away from the signal acquisition system, and the power on and off of the acquisition system can be remotely controlled. The air source is placed in the remote control room to remotely control the power on and off of the acquisition system.

[0063] As Figure 2As shown, the interface of the power charging cable for the signal acquisition system is in BNC form, and the power supply of the signal acquisition system can be charged through a long-distance shielded cable, avoiding coupling a large current in a strong electromagnetic field environment and affecting the acquisition system.

[0064] The system power supply unit provides the voltage required for the normal operation of the signal acquisition module, the SFP optical transceiver module in the shielding cavity, and the signal processor. The power supply adopted in this embodiment is a 12V 400AH lithium battery, which can directly supply power to the signal acquisition module; a DC 12V-5V DC voltage conversion module is used to provide a 5V working voltage for the SFP optical transceiver module. The selected battery capacity can meet the requirement that the system can continuously work for no less than 24 hours.

[0065] The signal processor is a micro industrial control computer. The signal processor adopted in this embodiment is a Kuaxiong K220 industrial control computer, and the remote control unit is a notebook computer, which has Ethernet and USB standard interfaces for easy communication.

[0066] The remote control software includes an acquisition card search unit, a parameter setting unit, a signal acquisition unit, a signal display and storage unit, and a system monitoring unit.

[0067] The acquisition card search unit scans the available acquisition modules in the system one by one; the parameter setting unit configures parameters such as acquisition channel information and data storage information; the signal acquisition unit realizes the data acquisition of the signal; the signal display and storage unit displays the signal waveform and performs control operations at the remote control end, and saves the data to a file in a specified format; the system monitoring unit acquires and displays the status of the power supply and the signal processor.

[0068] A remote signal acquisition system for a high-power pulse source can preferably meet the requirements of easy installation and convenient maintenance.

[0069] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the present invention.

Claims

1. A remote signal acquisition system for a high-power pulse source, comprising a signal processor, a signal acquisition module, a signal conditioning module, a communication module A, a communication module B, a system power supply unit, and a remote control unit; It is characterized in that It further includes a shielding cavity; The signal processor, the signal acquisition module, the signal conditioning module, and the communication module A are located inside the shielding cavity, and the shielding cavity is installed on the pulse source device to be measured; the remote control unit and the communication module B are located at the remote control end; The system power supply unit supplies power to the signal acquisition module, the communication module A, and the signal processor respectively; the system power supply unit includes a power supply, an air pressure switch, and an air source. The air source is located at the remote control end, and the power supply and the air pressure switch are located inside the shielding cavity; the air source is connected to the air pressure switch through an air pipe, and the air pressure switch controls whether the power supply supplies power to the signal acquisition module, the communication module A, and the signal processor; The power supply is connected to the remote control unit, The remote control unit controls the air source pressure, thereby controlling the on and off of the air pressure switch; The signal conditioning module, the signal acquisition module, the signal processor, the communication module A, the communication module B, and the remote control unit are connected in sequence; the communication module A and the communication module B are connected by an optical fiber; The remote control unit controls the reset and restart of the signal acquisition module and the signal processor, as well as the display, reading, and saving of the data collected by the signal acquisition module; The signal of the signal source is transmitted to the signal conditioning module through a signal transfer board. The signal conditioning module preprocesses the received signal, and the preprocessed signal is transmitted to the signal acquisition module. The signal collected by the signal acquisition module is transmitted to the remote control unit through the signal processor, the communication module A, and the communication module B; The signal conditioning module is used for preprocessing the signal of the signal source, and the preprocessed signal is transmitted to the signal acquisition module; the communication module A converts the electrical signal of the signal processor into an optical signal and sends it to the remote control end for processing through an optical fiber.

2. The remote signal acquisition system according to claim 1, wherein The optical fiber connecting the communication module A and the communication module B is a single-mode optical fiber, and the maximum distance between the communication module A and the communication module B is 10 km.

3. The remote signal acquisition system according to claim 1, wherein In the measured pulse source, there are N signals to be measured, and N signal acquisition channels are required. If an oscilloscope acquisition card with M channels is selected as the signal acquisition module, the number of oscilloscope acquisition cards required is pcs; where N≥1, M≥1, and both N and M are integers, and the symbol denotes rounding up to the nearest integer.

4. The remote signal acquisition system according to claim 1, wherein The shielding cavity is made of metal material, and two corresponding sides can be completely opened. It is connected to the cavity of the device to be measured through a flange. The signal transfer board is connected to the shielding cavity through a gas-tight BNC connector. The gas pressure inside the shielding cavity is normal pressure, which does not affect the airtightness and air pressure inside the pulse source cavity.

5. The remote signal acquisition system according to claim 1, characterized in that, The signal conditioning module includes an attenuator, and the signal processor reads the power supply voltage in real time through an AD sampler to obtain the power supply power status.

6. The remote signal acquisition system according to claim 1, wherein When the gas pressure in the air pipe is greater than the starting pressure P1, the air pressure switch closes, and the power supply supplies power to the signal acquisition module and the signal processor; when the gas pressure in the air pipe is less than the starting pressure P1, the air pressure switch disconnects.

7. The remote signal acquisition system according to claim 1, characterized in that, The system power supply unit is an independent battery module.

8. The remote signal acquisition system according to claim 1, characterized in that The signal processor is a micro industrial control computer.

9. The remote signal acquisition system according to claim 1, wherein The remote control unit is a laptop computer, which is provided with Ethernet and USB standard interfaces.

10. The remote signal acquisition system according to any one of claims 1 to 9, characterized in that, It further includes a power monitoring module for monitoring the power supply power. The power monitoring module includes an AD sampler, a resistor R1, and a resistor R2. The AD sampler is connected in series with the resistor R1, and the resistor R2 is connected in parallel with the AD sampler.

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