Synchronous interface control unit of single-point current meter

Abstract

The utility model discloses a single-point current meter synchronous interface control unit, which comprises a power supply isolation module, a photoelectric isolation module and a synchronous signal gating module, and is characterized in that the synchronous signal gating module is connected with the photoelectric isolation module; the power supply isolation module is used for electrically isolating an input power supply, and the input power supply respectively realizes independent isolated power supply for the photoelectric isolation module and the synchronous signal gating module; the photoelectric isolation module is used for carrying out photoelectric isolation on different synchronizing signals; and the synchronous signal gating module is used for receiving an external control signal and an isolation signal output by the photoelectric isolation module to realize gating switching of a synchronous signal working mode.

Description

Technical Field

[0001] This utility model relates to the field of signal synchronization control technology, and in particular to a single-point current meter synchronization interface control unit. Background Technology

[0002] In the field of marine environmental observation, single-point current meters are crucial for acquiring ocean current data. The performance of their synchronization interface control unit directly affects the accuracy, reliability, and applicability of ocean current data acquisition. Currently, commercially available single-point current meter synchronization interface control units generally suffer from the following technical defects: 1. Most existing synchronization interface control units only support a single type of synchronization signal, failing to flexibly adapt to the synchronization signal output of different systems, thus limiting the applicable scenarios of the current meter and resulting in poor compatibility; 2. The lack of effective opto-isolation design during signal transmission allows external interference signals to easily penetrate the control unit through the signal transmission path, causing synchronization signal distortion, which in turn affects the synchronization control accuracy and reduces the reliability of data acquisition; 3. In TTL synchronization mode, existing designs easily lead to large current paths forming on the pins of subsequently connected chips, significantly increasing system power consumption. Since single-point current meters mostly operate using underwater self-capacitance, high power consumption severely shortens the underwater operating time of the equipment, failing to meet the stringent low-power requirements of marine instruments operating underwater and making it difficult to meet the working needs of complex marine environments. Summary of the Invention

[0003] In view of the above-mentioned prior art, the present invention provides a single-point current meter synchronization interface control unit, which mainly solves the technical problems existing in the background art.

[0004] To achieve the above objectives, the technical solution of this utility model embodiment is as follows: a single-point current meter synchronization interface control unit, the control unit including a power isolation module, an opto-isolation module and a synchronization signal gating module, the synchronization signal gating module being interconnected with the opto-isolation module;

[0005] The power isolation module is used to electrically isolate the input power supply, and the input power supply is independently isolated for the opto-isolation module and the synchronization signal gating module respectively;

[0006] The opto-isolation module is used to opto-isolate different synchronization signals;

[0007] The synchronization signal selection module is used to receive external control signals and isolation signals output by the opto-isolation module, and to switch the synchronization signal working mode.

[0008] Optionally, the power isolation module includes a digital isolator, inductors L1151 and L1152, capacitors C1151, C1152, C1153, C1154, C1155 and resistor R1151. The external power supply is filtered by inductor L1151 and capacitors C1151 and C1152 and then connected to the power input terminal of the digital isolator.

[0009] Inductor L1152, capacitors C1153, C1154, C1155 and resistor R1151 are all connected to the power output terminal of the digital isolator, which supplies power to the opto-isolation module and the synchronization signal gating module respectively.

[0010] Optionally, the opto-isolation module includes a first isolation chip and a second isolation chip. The signal output terminal of the synchronization signal gating module is connected to the first isolation chip, the output terminal of the first isolation chip is connected to the signal input terminal of the synchronization signal gating module, and the output terminal of the second isolation chip is connected to the synchronization signal gating module.

[0011] Optionally, the input terminal of the second isolation chip is connected to an external trigger element.

[0012] Optionally, the synchronization signal gating module includes a MAX3471 transceiver and a DIP switch. The signal input terminal of the MAX3471 transceiver is connected to the first isolation chip and the second isolation chip, respectively, and its signal output terminal is connected to the DIP switch.

[0013] Optionally, the MAX3471 transceiver is used to receive an external 485 signal and output a drive signal to the first isolation chip based on the external 485 signal. The first isolation chip generates a first isolation signal based on the drive signal, and the MAX3471 transceiver generates a first isolation synchronization signal based on the first isolation signal and outputs it by the DIP switch.

[0014] Optionally, the second isolation chip generates a second isolation signal based on an external TTL signal, and the MAX3471 transceiver generates a second isolation synchronization signal based on the second isolation signal and outputs it by the DIP switch.

[0015] Optionally, a 100KΩ current-limiting resistor is connected in series between the output of the second isolation chip and one input of the DIP switch.

[0016] The beneficial effects of this invention are as follows: By independently opto-isolating the 485 synchronization signal and the TTL synchronization signal through the opto-isolation module, the technical problems of existing synchronization interface control units that only support a single type of synchronization signal, have poor compatibility, and are limited in applicable scenarios are effectively solved. This allows the control unit to flexibly adapt to the synchronization signal output of different systems, providing a selectable interface for acoustic system integration. The synchronization signal avoids interference from devices operating at the same frequency, preventing noise from the device itself and ultimately causing abnormal sensor measurement data. Furthermore, it specifically addresses the technical problem of excessive system power consumption in TTL synchronization mode, extending the underwater operating time of the single-point current meter. Attached Figure Description

[0017] Figure 1 This is a circuit diagram of the power isolation module in an embodiment of this application;

[0018] Figure 2 This is a circuit diagram of the opto-isolation module in an embodiment of this application;

[0019] Figure 3 This is a circuit diagram of the synchronization signal gating module in an embodiment of this application. Detailed Implementation

[0020] The technical solution of this utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments. Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this utility model belongs. The terminology used in this specification of this utility model is for the purpose of describing particular embodiments only and is not intended to limit the utility model. In the following description, the expression "some embodiments" refers to a subset of all possible embodiments; however, it should be understood that "some embodiments" can be the same subset or different subsets of all possible embodiments and can be combined with each other without conflict.

[0021] In the following description, numerous specific details are set forth in order to provide a more thorough understanding of the present invention. However, it will be apparent to those skilled in the art that the present invention can be practiced without one or more of these details. In other instances, certain technical features well-known in the art have not been described in order to avoid confusion with the present invention.

[0022] It should be understood that this invention can be embodied in various forms and should not be construed as limited to the embodiments set forth herein. Rather, providing these embodiments will make the disclosure thorough and complete, and will fully convey the scope of this invention to those skilled in the art. Furthermore, the terminology used herein is intended only to describe particular embodiments and is not intended to limit the invention. When used herein, the singular forms “a,” “an,” and “the” are also intended to include the plural forms unless the context clearly indicates otherwise. It should also be understood that the terms “compose” and / or “comprising,” when used in this specification, identify the presence of the stated features, integers, steps, operations, elements, and / or components, but do not exclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and / or groups. When used herein, the term “and / or” includes any and all combinations of the associated listed items.

[0023] It should also be noted that when an element is referred to as being "fixed to" another element, it can be directly attached to the other element or there may be an intervening element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "inner," "outer," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0024] To fully understand this utility model, a detailed structure will be presented in the following description to illustrate the technical solution proposed by this utility model. Optional embodiments of this utility model are described in detail below; however, in addition to these detailed descriptions, this utility model may have other embodiments.

[0025] Please refer to the attached document. Figures 1-3 This application provides a single-point current meter synchronization interface control unit, the control unit including a power isolation module, an opto-isolation module and a synchronization signal gating module, the synchronization signal gating module being interconnected with the opto-isolation module;

[0026] The power isolation module is used to electrically isolate the input power supply, and the input power supply is independently isolated for the opto-isolation module and the synchronization signal gating module respectively;

[0027] The opto-isolation module is used to opto-isolate different synchronization signals;

[0028] The synchronization signal selection module is used to receive external control signals and isolation signals output by the opto-isolation module, and to switch the synchronization signal working mode.

[0029] Specifically, the single-point current meter synchronization interface control unit disclosed in this application electrically isolates the input power supply through a power isolation module, thereby achieving independent isolated power supply for the opto-isolation module and the synchronization signal gating module. This ensures the electrical independence of the power supply for each module and avoids interference between power supply circuits. The opto-isolation module performs opto-isolation processing on the 485 synchronization signal or the TTL synchronization signal respectively, ensuring the reliability and anti-interference capability of the two signal transmissions. The synchronization signal gating module receives external control signals and the isolation signals output by the opto-isolation module, and selects and switches the isolated 485 synchronization signal and the TTL synchronization signal based on the external control signals, thereby adapting to the output conditions of different systems.

[0030] In some optional examples, the power isolation module includes a digital isolator, inductors L1151 and L1152, capacitors C1151, C1152, C1153, C1154, C1155 and resistor R1151. An external power supply is filtered by inductors L1151 and capacitors C1151 and C1152 and then connected to the power input terminal of the digital isolator.

[0031] Inductor L1152, capacitors C1153, C1154, C1155 and resistor R1151 are all connected to the power output terminal of the digital isolator, which supplies power to the opto-isolation module and the synchronization signal gating module respectively.

[0032] Specifically, the current output from the external power supply passes through a filter circuit composed of inductor L1151, capacitor C1151, and capacitor C1152 to filter out interference noise. Then, the pre-filtered current is sent to the power input terminal of the digital isolator. The digital isolator electrically isolates this input power supply, separating its input and output power to prevent interference signals from being transmitted through the power path. At the power output terminal of the digital isolator, inductor L1152, capacitors C1153, C1154, and C1155, along with resistor R1151, constitute an output filter and voltage regulator circuit. This circuit filters and smooths the isolated output power supply, ensuring the stability and purity of the output voltage. The processed stable current is output from the power output terminal of the digital isolator, providing independent and isolated operating power to the opto-isolation module and the synchronization signal gating module, thereby ensuring the stable operation of the subsequent modules.

[0033] Furthermore, the chip model of the digital isolator is ADUM1402.

[0034] In some optional examples, the opto-isolation module includes a first isolation chip and a second isolation chip, the signal output terminal of the synchronization signal gating module is connected to the first isolation chip, the output terminal of the first isolation chip is connected to the signal input terminal of the synchronization signal gating module, the input terminal of the second isolation chip is connected to an external triggering element, and the output terminal of the second isolation chip is connected to the synchronization signal gating module.

[0035] Specifically, the synchronization signal gating module outputs a drive signal based on an external 485 signal. The first isolation chip performs opto-isolation conversion on this 485 synchronization signal based on the drive signal, converting it from an electrical signal to an optical signal, and then back to an electrical signal, thereby generating a 485 isolated signal that is logically consistent with the original 485 synchronization signal but electrically completely isolated. This 485 isolated signal is then fed back to the signal input of the synchronization signal gating module through the output of the first isolation chip to achieve closed-loop feedback and integrity verification of the signal.

[0036] The second isolation chip receives an externally input TTL synchronization signal at its input terminal. The second isolation chip performs opto-isolation on this TTL synchronization signal, generating an isolation signal logically corresponding to the input TTL synchronization signal through the same conversion process described above. This isolated TTL signal is then transmitted to the synchronization signal gating module through the output terminal of the second isolation chip, serving as a signal source for mode switching by this module.

[0037] Furthermore, the first isolation chip uses an HCPL-0501 optocoupler control chip, and the second isolation chip uses an HCPL-0701 optocoupler control chip.

[0038] Optionally, the synchronization signal gating module includes a MAX3471 transceiver and a DIP switch. The signal input terminal of the MAX3471 transceiver is connected to the first isolation chip and the second isolation chip, respectively, and its signal output terminal is connected to the DIP switch.

[0039] The opto-isolation module provides independent opto-isolation for both the 485 synchronization signal and the TTL synchronization signal, ensuring electrical isolation between the two signals during transmission, effectively suppressing external interference, and guaranteeing the stability and reliability of signal transmission.

[0040] In some optional examples, the synchronization signal gating module includes a MAX3471 transceiver and a DIP switch. The DIP switch has a 485 output and a TTL output. The signal input of the MAX3471 transceiver is connected to the first isolation chip and the second isolation chip, respectively, and its signal output is connected to the DIP switch. The MAX3471 transceiver is used to receive external 485 signals and output a drive signal to the first isolation chip based on the external 485 signals. The first isolation chip generates a first isolation signal based on the drive signal, and the MAX3471 transceiver generates a first isolation synchronization signal based on the first isolation signal and outputs it through the 485 output of the DIP switch. The second isolation chip generates a second isolation signal based on an external TTL signal, and the MAX3471 transceiver generates a second isolation synchronization signal based on the second isolation signal and outputs it through the TTL output of the DIP switch.

[0041] Specifically, the external RS-485 signal is first connected to the receiver (RO) of the MAX3471 transceiver. The MAX3471 generates a corresponding drive signal based on this signal and outputs it to the input of the first isolation chip. The first isolation chip performs opto-isolation conversion on the drive signal, generating a first isolation signal that is logically consistent with the drive signal. This first isolation signal is fed back to the signal input (DI) of the MAX3471. The MAX3471 performs logic processing based on the first isolation signal and generates a first isolation synchronization signal, which is transmitted to the DIP switch through its signal output.

[0042] Similarly, an external TTL signal is input to the input terminal of the second isolation chip. The second isolation chip performs opto-isolation conversion on the TTL signal, generating a second isolation signal and outputting it to the signal input terminal of the MAX3471. After receiving the second isolation signal, the MAX3471 processes it internally to generate a second isolation synchronization signal, which is also transmitted to the DIP switch.

[0043] The DIP switch can selectively output either the first isolated synchronization signal corresponding to the 485 synchronization mode or the second isolated synchronization signal corresponding to the TTL synchronization mode by switching positions, thereby realizing the selection and switching between 485 synchronization signals and TTL synchronization signals to adapt to the synchronization signal requirements of different systems.

[0044] In some optional examples, a 100KΩ current-limiting resistor is connected in series between the output of the second isolation chip and one input of the DIP switch.

[0045] When in synchronous mode and the DIP switch is set to TTL, the high-level signal output by the second isolation chip needs to be transmitted to the TTL input of the DIP switch. This may affect the potential of pin 4 of the subsequently connected ADUM1402 chip, causing a large current path on that pin and significantly increasing system power consumption. To reduce power consumption, a 100KΩ current-limiting resistor is connected in series between the output of the second isolation chip and the TTL input of the DIP switch, effectively limiting the current flowing through this signal path. On the one hand, the current-limiting effect of the resistor reduces the current load on pin 4 of the ADUM1402 chip, avoiding increased power consumption due to excessive current. On the other hand, the resistor does not affect the logic state of the high-level signal, ensuring the normal selection and output of the TTL synchronization signal. This specifically solves the power consumption problem in TTL mode, especially suitable for the low-power requirements of marine instruments and equipment operating underwater with self-capacitance, achieving optimized control of system power consumption while ensuring reliable signal transmission.

[0046] The above are merely specific embodiments of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. The protection scope of this utility model should be determined by the protection scope of the stated claims.

Claims

1. A single point ocean current meter synchronous interface control unit, characterized by, The control unit comprises a power supply isolation module, an optoelectronic isolation module and a synchronous signal gating module, and the synchronous signal gating module is interconnected with the optoelectronic isolation module; The power supply isolation module is used for electrically isolating an input power supply, and the input power supply is used for independently isolating and supplying power to the optoelectronic isolation module and the synchronous signal gating module. The optoelectronic isolation module is used for optoelectronic isolation of different synchronous signals. The synchronous signal gating module is used for receiving an external control signal and an isolated signal output by the optoelectronic isolation module, and realizing gating switching of a synchronous signal working mode.

2. A single point ocean current meter synchronous interface control unit according to claim 1, wherein, The power supply isolation module comprises a digital isolator, inductors L1151 and L1152, capacitors C1151, C1152, C1153, C1154, C1155 and a resistor R1151, and an external power supply is connected to a power supply input end of the digital isolator after being filtered by the inductors L1151 and C1151 and C1152. The inductors L1152, the capacitors C1153, C1154, C1155 and the resistor R1151 are all connected to a power supply output end of the digital isolator, and the power supply output end of the digital isolator is used for supplying power to the optoelectronic isolation module and the synchronous signal gating module.

3. A single point ocean current meter synchronous interface control unit according to claim 1, wherein, The optoelectronic isolation module comprises a first isolation chip and a second isolation chip, a signal output end of the synchronous signal gating module is connected to the first isolation chip, an output end of the first isolation chip is connected to a signal input end of the synchronous signal gating module, and an output end of the second isolation chip is connected to the synchronous signal gating module.

4. A single point ocean current meter synchronous interface control unit according to claim 3, wherein, An input end of the second isolation chip is connected to an external trigger element.

5. A single point ocean current meter synchronous interface control unit according to claim 4, wherein, The synchronous signal gating module comprises a MAX3471 transceiver and a dial switch, a signal input end of the MAX3471 transceiver is connected to the first isolation chip and the second isolation chip respectively, and a signal output end of the MAX3471 transceiver is connected to the dial switch.

6. A single point ocean current meter synchronous interface control unit according to claim 5, wherein, The MAX3471 transceiver is used for receiving an external 485 signal, outputting a driving signal to the first isolation chip based on the external 485 signal, generating a first isolated signal based on the driving signal, generating a first isolated synchronous signal based on the first isolated signal and outputting the first isolated synchronous signal by the dial switch.

7. A single point ocean current meter synchronous interface control unit according to claim 6, wherein, The second isolation chip is used for generating a second isolated signal based on an external TTL signal, and the MAX3471 transceiver is used for generating a second isolated synchronous signal based on the second isolated signal and outputting the second isolated synchronous signal by the dial switch.

8. A single point ocean current meter synchronous interface control unit according to claim 7, wherein, A current-limiting resistor of 100KΩ is connected in series between the output end of the second isolation chip and an input end of the dial switch.

Images