GPIB interface to optical fiber transmission device and method

Abstract

The invention discloses a GPIB interface-to-optical fiber transmission device and method, and the device comprises a GPIB interface module which is connected to instrument equipment through a standard GPIB interface, and is used for receiving or outputting a GPIB signal; the signal conversion module is used for converting the GPIB electric signal into an optical signal and restoring the received optical signal into the GPIB electric signal; the optical fiber communication module is used for injecting the modulated optical signal into an optical fiber cable through an SFP (Small Form-Factor Pluggable) interface for long-distance transmission of the optical signal, receiving the optical signal through an optical receiver at the other end, demodulating the optical signal and recovering the optical signal into an electric signal; and the control processing module is used for coordinating a signal conversion process, managing data streams and processing abnormal conditions. The GPIB signal transmission device converts transmitted electric signals into optical pulse signals and performs long-distance transmission through an optical fiber medium, thereby realizing stable transmission of GPIB signals in long-distance and high-interference environments, remarkably improving transmission distance and reliability of data transmission, and being suitable for modern complex industrial and experimental environments.

Description

Technical Field

[0001] The invention relates to a photoelectric signal transmission device, and in particular to a GPIB interface to optical fiber transmission device and method. Background Art

[0002] At present, GPIB (General-Purpose Interface Bus) is a traditional communication bus interface commonly found in desktop instruments. Since its introduction in the 1960s, GPIB has become a standard interface for many electronic test instruments due to its reliability and high compatibility, used for data exchange and control between devices. However, with the development of modern technology and the diversification of application needs, the inherent defects of the GPIB interface have gradually emerged, especially in terms of transmission distance and anti-interference ability.

[0003] The GPIB interface uses a parallel communication method, which can achieve low data transmission latency, but its transmission distance is limited, usually only supporting stable transmission within a few meters. With the continuous expansion of the deployment range of instruments and equipment and the complexity of test scenarios, traditional GPIB cables can no longer meet the needs of long-distance transmission. In addition, GPIB cables are susceptible to electromagnetic interference, especially in industrial environments, where the presence of electromagnetic noise may cause a significant decrease in the stability and accuracy of data transmission. These problems are particularly prominent in test and measurement situations that require high precision and reliability.

[0004] Existing technology and defects:

[0005] Because the GPIB bus uses multiple data lines to transmit data in parallel, its reliability and anti-interference ability are insufficient. In high-power AC and DC source equipment, the equipment itself generates electromagnetic interference, so the anti-interference ability of data transmission is particularly important. If the data is transmitted with errors, it may cause the system to burn out. In addition, the length of the GPIB interface bus also makes it impossible to perform remote debugging.

[0006] Traditional solutions often involve increasing the length of the GPIB cable, but this does not effectively solve the distance problem. By using a longer GPIB cable, the transmission distance can be increased to a certain extent. However, the longer the GPIB cable, the more signal attenuation will increase, affecting the reliability of data transmission. In addition, the longer the cable, the more susceptible it is to electromagnetic interference, resulting in reduced stability of data transmission. This method has high requirements for the environment and cannot adapt to complex industrial sites.

[0007] In summary, the existing technology has certain shortcomings in dealing with the limitations of GPIB interface transmission distance and anti-interference ability. How to achieve long-distance, low-loss, and anti-interference data transmission while maintaining the high compatibility and stability of the GPIB interface has become a technical problem that needs to be solved urgently. Therefore, a GPIB interface conversion device based on optical fiber transmission technology came into being in order to solve the above problems and adapt to the new requirements for data transmission in modern industry and scientific research.

[0008] In view of this, the present invention is proposed. Summary of the invention

[0009] The purpose of the present invention is to provide a GPIB interface to optical fiber transmission device and method to solve the above technical problems existing in the prior art.

[0010] The objective of the present invention is achieved through the following technical solutions:

[0011] The GPIB interface to optical fiber transmission device of the present invention comprises:

[0012] GPIB interface module: This module is connected to instrumentation equipment through a standard GPIB interface and is used to receive or output GPIB signals;

[0013] Signal conversion module: used to convert GPIB electrical signals into optical signals; or to restore received optical signals into GPIB electrical signals;

[0014] Optical fiber communication module: The modulated optical signal is injected into the optical fiber cable through the SFP interface for long-distance transmission of the optical signal. The optical signal is received and demodulated by the optical receiver at the other end to restore it to an electrical signal.

[0015] Control processing module: This module is used to coordinate the signal conversion process, manage data flow and handle abnormal situations.

[0016] The method for using the above-mentioned GPIB interface to optical fiber transmission device comprises the following steps:

[0017] Connecting the GPIB interface module to the instrumentation equipment via a standard GPIB cable;

[0018] Connecting the transmitting end and the receiving end of the device through the signal conversion module and the optical fiber communication module;

[0019] Turn on the power and start the device;

[0020] The device automatically converts the signal, converts the GPIB signal into an optical signal and transmits it through optical fiber.

[0021] At the receiving end, the optical signal is converted back to a GPIB signal for use by the target device.

[0022] Compared with the prior art, the GPIB interface to optical fiber transmission device and method provided by the present invention converts the transmitted electrical signal into an optical pulse signal, and transmits it over a long distance through an optical fiber medium, thereby realizing stable transmission of GPIB signals over long distances and in a high-interference environment. Compared with the traditional GPIB cable transmission method, the present invention utilizes the low loss and anti-electromagnetic interference characteristics of optical fiber transmission, significantly improves the transmission distance and data transmission reliability, and is suitable for modern complex industrial and experimental environments. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 A schematic diagram of a GPIB interface to optical fiber transmission device provided in an embodiment of the present invention. DETAILED DESCRIPTION

[0024] The following is a clear and complete description of the technical solutions in the embodiments of the present invention in conjunction with the drawings in the embodiments of the present invention; it is obvious that the described embodiments are only part of the embodiments of the present invention, not all of the embodiments, which does not constitute a limitation of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the protection scope of the present invention.

[0025] First, the terms that may be used in this article are explained as follows:

[0026] The term “and / or” means that either or both of them can be realized at the same time. For example, X and / or Y means both “X” or “Y” and “X and Y”.

[0027] The terms "include", "comprises", "contains", "has" or other descriptions with similar semantics should be interpreted as non-exclusive inclusion. For example, including certain technical feature elements (such as raw materials, components, ingredients, carriers, dosage forms, materials, dimensions, parts, components, mechanisms, devices, steps, procedures, methods, reaction conditions, processing conditions, parameters, algorithms, signals, data, products or products, etc.) should be interpreted as including not only certain technical feature elements explicitly listed, but also other technical feature elements known in the art that are not explicitly listed.

[0028] The term "consisting of..." means excluding any technical feature elements not explicitly listed. If this term is used in a claim, it will make the claim closed, so that it does not contain technical feature elements other than the technical feature elements explicitly listed, except for the conventional impurities related to them. If this term only appears in a clause of a claim, it only limits the elements explicitly listed in the clause, and the elements recorded in other clauses are not excluded from the overall claim.

[0029] Unless otherwise specified or limited, the terms "installed", "connected", "connected", "fixed" and the like 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 a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this article can be understood according to specific circumstances.

[0030] The orientation or position relationship indicated by terms such as "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", etc. are based on the orientation or position relationship shown in the drawings and are only for the convenience and simplification of description, and do not explicitly or implicitly indicate that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation of this document.

[0031] The contents not described in detail in the examples of the present invention belong to the prior art known to professionals in the field. If no specific conditions are specified in the examples of the present invention, the conditions are carried out according to the conventional conditions in the field or the conditions recommended by the manufacturer. If the manufacturer is not specified in the reagents or instruments used in the examples of the present invention, they are all conventional products that can be purchased commercially.

[0032] The GPIB interface to optical fiber transmission device of the present invention comprises:

[0033] GPIB interface module: This module is connected to instrumentation equipment through a standard GPIB interface and is used to receive or output GPIB signals;

[0034] Signal conversion module: used to convert GPIB electrical signals into optical signals; or to restore received optical signals into GPIB electrical signals;

[0035] Optical fiber communication module: The modulated optical signal is injected into the optical fiber cable through the SFP interface for long-distance transmission of the optical signal. The optical signal is received and demodulated by the optical receiver at the other end to restore it to an electrical signal.

[0036] Control processing module: This module is used to coordinate the signal conversion process, manage data flow and handle abnormal situations.

[0037] The control processing module includes a computer control terminal.

[0038] The method for using the above-mentioned GPIB interface to optical fiber transmission device comprises the following steps:

[0039] Connecting the GPIB interface module to the instrumentation equipment via a standard GPIB cable;

[0040] Connecting the transmitting end and the receiving end of the device through the signal conversion module and the optical fiber communication module;

[0041] Turn on the power and start the device;

[0042] The device automatically converts the signal, converts the GPIB signal into an optical signal and transmits it through optical fiber.

[0043] At the receiving end, the optical signal is converted back to a GPIB signal for use by the target device.

[0044] In summary, the GPIB interface to optical fiber transmission device and method of the embodiment of the present invention converts the signal of the GPIB interface into an optical fiber signal for long-distance transmission to meet a wider range of communication needs and solve the problem of electrical interference. Optical fiber cables use optical pulses instead of electrical signals to transmit data to avoid electromagnetic interference, because these optical pulses are also not affected by electromagnetic radiation, including electromagnetic interference and radio frequency interference, the latter of which can even destroy electrical signals in copper cables. The glass or plastic fibers used in optical cables are not conductive and do not generate electromagnetic fields, so they are not affected by external electromagnetic fields or "crosstalk" because they are confined in the optical fiber core and do not radiate outward.

[0045] The core of the present invention is to convert the transmitted electrical signal into an optical pulse signal, and transmit it over long distances through an optical fiber medium, thereby realizing stable transmission of GPIB signals over long distances and in high-interference environments. Compared with the traditional GPIB cable transmission method, the present invention utilizes the low loss and anti-electromagnetic interference characteristics of optical fiber transmission, significantly improving the transmission distance and data transmission reliability, and is suitable for modern complex industrial and experimental environments.

[0046] The advantages of the present invention can be summarized in the following three points:

[0047] ①Signal conversion and optical fiber transmission:

[0048] The GPIB bus usually uses electrical signals for data transmission, and optical fiber transmission requires these electrical signals to be converted into optical pulse signals. The signal conversion module in the invention converts the parallel electrical signals of the GPIB interface into optical signals suitable for optical fiber transmission. This conversion is achieved through signal modulation technology, using photoelectric conversion devices (such as laser diodes or LEDs) to modulate electrical signals into optical signals.

[0049] ②Data integrity and anti-interference:

[0050] Optical signals transmitted through optical fibers are not affected by electromagnetic interference, which is particularly important in industrial environments with a lot of electromagnetic noise. Optical signals have extremely low loss during long-distance transmission, ensuring data integrity and transmission stability. In addition, optical fibers also support high-speed data transmission and can meet high bandwidth requirements.

[0051] ③Two-way communication and real-time:

[0052] The device of the present invention supports bidirectional communication, that is, it can convert GPIB signals into optical signals for transmission, and can also receive optical signals and restore them into GPIB signals. This bidirectional conversion ensures the real-time communication capability between GPIB devices. By managing the data flow through the control processing module, the real-time and accuracy of data transmission can be ensured.

[0053] In order to more clearly demonstrate the technical solution and technical effects provided by the present invention, the embodiments of the present invention are described in detail with specific embodiments below.

[0054] Example 1

[0055] like Figure 1 As shown:

[0056] The GPIB interface to optical fiber transmission device in this embodiment is composed of the following parts:

[0057] GPIB interface module: This module is connected to instruments or control devices through a standard GPIB interface to receive or output GPIB signals.

[0058] Signal conversion module: used to convert GPIB electrical signals into optical signals, and restore received optical signals to GPIB electrical signals.

[0059] Fiber optic communication module: The modulated optical signal is injected into the optical fiber cable through the optical port (SFP interface) for long-distance signal transmission. The optical signal is received and demodulated at the other end by an optical receiver to restore it to an electrical signal.

[0060] Control processing module: This module is used to coordinate the signal conversion process, manage data flow and handle abnormal situations.

[0061] During the use of instruments, the device first receives or transmits signals from instruments through the GPIB interface, and after data analysis and forwarding by FPGA, it is transmitted to the computer terminal through the optical fiber cable. At the receiving end, the optical fiber communication module restores the optical signal to a GPIB signal for use by the target device. The entire process is real-time and efficient, and is suitable for data communication scenarios that require long distance and high stability.

[0062] In practical application, the method of using the device includes the following steps:

[0063] Connect the GPIB interface module of the GPIB interface to optical fiber transmission device to the instrument through a standard GPIB cable.

[0064] The transmitting end and the receiving end of the device are connected through the optical fiber medium.

[0065] Turn on the power and start the device.

[0066] The device automatically converts the signal, converts the GPIB signal into an optical signal and transmits it through optical fiber.

[0067] At the receiving end, the optical signal is converted back to a GPIB signal for use by the target device.

[0068] Through this device, users can achieve stable GPIB signal transmission in remote control systems or distributed test systems, effectively extending the operating distance of the equipment, simplifying wiring work, and improving the reliability of data transmission.

[0069] The above is only a preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily thought of by any technician familiar with the technical field within the technical scope disclosed in the present invention should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims. The information disclosed in the background technology section of this article is only intended to deepen the understanding of the overall background technology of the present invention, and should not be regarded as an admission or in any form that the information constitutes prior art known to those skilled in the art.

Claims

1. A GPIB interface to optical fiber transmission device, characterized in that: include: GPIB interface module: This module is connected to instrumentation equipment through a standard GPIB interface and is used to receive or output GPIB signals; Signal conversion module: used to convert GPIB electrical signals into optical signals; or to restore received optical signals into GPIB electrical signals; Optical fiber communication module: The modulated optical signal is injected into the optical fiber cable through the SFP interface for long-distance transmission of the optical signal. The optical signal is received and demodulated by the optical receiver at the other end to restore it to an electrical signal. Control processing module: This module is used to coordinate the signal conversion process, manage data flow and handle abnormal situations.

2. The GPIB interface to optical fiber transmission device according to claim 1, characterized in that: The control processing module includes a computer control terminal.

3. A method for using the GPIB interface to optical fiber transmission device according to claim 1 or 2, characterized in that: The following steps are involved: Connecting the GPIB interface module to the instrumentation equipment via a standard GPIB cable; Connecting the transmitting end and the receiving end of the device through the signal conversion module and the optical fiber communication module; Turn on the power and start the device; The device automatically converts the signal, converts the GPIB signal into an optical signal and transmits it through optical fiber. At the receiving end, the optical signal is converted back to a GPIB signal for use by the target device.

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