Intelligent adaptive relay device for condition monitoring analog signals

Abstract

The utility model relates to state monitoring analog signal intelligent adaptive relay device, include: signal input end for receiving analog signal from signal source, adaptive relay module for to received analog signal processing, signal output end for transmitting analog signal transmission to signal collection device after processing, wherein, adaptive relay module includes: filter module for to analog signal filtering processing, gain module for to the signal of filtering gain amplification, control module is connected with filter module and gain module respectively, for according to analog signal's feature, control filter module's filter parameter and gain module's gain parameter. The utility model's beneficial effect is: the utility model effectively avoided high frequency signal in transmission process because of excessive attenuation and lost or distortion, thereby ensured the integrity of key state information, reduced because of signal distortion leads to the risk of fault leak judgment.

Description

Technical Field

[0001] This utility model relates to the field of signal relay technology, and in particular to an intelligent adaptive relay device for status monitoring analog signals. Background Technology

[0002] In condition monitoring systems, signal transmission from analog sensors is crucial. The buffered output signal driving capability of secondary instruments in critical units is limited, making signal relays essential when remote signal transmission is required. Remote analog signal transmission typically refers to transmitting analog signals over long distances to monitor and control the measured analog quantity at a remote location. Conventional signal repeaters amplify the analog signal to be transmitted over a wide frequency band to improve the signal-to-noise ratio, and then use current or voltage signals for transmission to compensate for signal attenuation.

[0003] Online monitoring of analog signals contains valuable unit status information. Conventional signal repeaters amplify analog signals that need to be transmitted over long distances. However, high-frequency, weak signals often contain key early fault characteristics. At the same time, high-frequency, weak signals are prone to attenuation during long-distance transmission, leading to signal distortion and ultimately causing missed fault diagnosis and serious accidents. Utility Model Content

[0004] The purpose of this invention is to overcome the shortcomings of the existing technology and provide an intelligent adaptive relay device for state monitoring analog signals.

[0005] Firstly, an intelligent adaptive relay device for state monitoring analog signals is provided, including: The signal input terminal is used to receive analog signals from the signal source; An adaptive relay module, connected to the signal input terminal, is used to process the received analog signal; The signal output terminal is connected to the adaptive relay module and is used to transmit the processed analog signal to the signal acquisition device. The adaptive relay module includes: A filtering module is used to filter the analog signal; Gain module, used to amplify the filtered signal; A control module, connected to both the filtering module and the gain module, is used to control the filtering parameters of the filtering module and the gain parameters of the gain module according to the characteristics of the analog signal.

[0006] Preferably, the control module includes a mixed-signal microcontroller.

[0007] Preferably, the filtering module includes a tunable filter chip.

[0008] Preferably, the gain module includes a programmable gain instrumentation amplifier with an integrated reference buffer.

[0009] Preferably, the adaptive relay module includes multiple signal processing paths arranged in parallel, and each signal processing path includes a corresponding filtering module and a gain module.

[0010] In a second aspect, another intelligent adaptive relay device for state monitoring analog signals is provided, comprising: an adaptive relay device, a signal source, and a signal acquisition device as described in any one of the first aspects; The signal source is connected to the signal input terminal of the adaptive relay device via an analog signal line, and the signal output terminal of the adaptive relay device is connected to the signal acquisition device via an analog signal line or a digital communication line.

[0011] Preferably, the signal source is a secondary instrument.

[0012] The beneficial effects of this utility model are: 1) This invention employs a parallel multi-signal processing path architecture, coupled with independent filtering and gain modules, to specifically process different frequency band components (especially high-frequency, weak signals containing early fault characteristics) in wideband analog signals. Compared to traditional single-path passband amplifier repeaters, this design effectively avoids the loss or distortion of high-frequency signals due to excessive attenuation during transmission, thereby ensuring the integrity of critical status information and reducing the risk of missed fault detection due to signal distortion.

[0013] 2) This invention, through the coordinated operation of the control module and the signal acquisition device, can automatically optimize and configure the best filtering and gain parameters for each path based on actual signal characteristics and transmission link features. This adaptive mechanism replaces the traditional fixed parameter settings, enabling the system to flexibly adapt to different sensors, operating conditions, and transmission distances, maintaining superior signal relay performance and transmission fidelity in complex industrial environments. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of a conventional signal relay device; Figure 2 This is a schematic diagram of the signal relay system provided in this application; Figure 3 This is a schematic diagram of another signal relay device provided in this application; Explanation of reference numerals in the attached diagram: Signal source 1, Adaptive repeater 2, Filtering module 201, Gain module 202, Control module 203, Signal acquisition device 3. Detailed Implementation

[0015] The present invention will be further described below with reference to embodiments. The description of the embodiments below is only for the purpose of helping to understand the present invention. It should be noted that, for those skilled in the art, several modifications can be made to the present invention without departing from the principle of the present invention, and these improvements and modifications also fall within the protection scope of the claims of the present invention.

[0016] Example 1: like Figure 1 As shown, conventional signal relay devices use a fixed-gain module to amplify the analog signal to be transmitted over long distances, improving the signal-to-noise ratio, and then use current or voltage signals for transmission to compensate for signal attenuation. However, high-frequency, weak signals containing early unit fault characteristics are prone to attenuation during long-distance transmission, leading to signal distortion and ultimately resulting in missed fault detection and serious accidents.

[0017] To address the problems of the prior art, Embodiment 1 of this application provides an intelligent adaptive relay device for state monitoring analog signals, such as... Figure 3 As shown, it includes: The signal input terminal is used to receive analog signals from signal source 1; An adaptive relay module, connected to the signal input terminal, is used to process the received analog signal; The signal output terminal is connected to the adaptive relay module and is used to transmit the processed analog signal to the signal acquisition device 3. The adaptive relay module includes: Filtering module 201 is used to filter the analog signal; Gain module 202 is used to amplify the filtered signal. The control module 203 is connected to the filtering module 201 and the gain module 202 respectively, and is used to control the filtering parameters of the filtering module 201 and the gain parameters of the gain module 202 according to the characteristics of the analog signal.

[0018] The control module 203 includes a mixed-signal microcontroller (such as MSP430FR597x), employing a 16-bit RISC architecture with a clock frequency of up to 16MHz, featuring a 32-bit hardware multiplier (MPY), a three-channel internal direct memory access (DMA), an RTC with calendar and alarm functions, five 16-bit timers with up to seven capture / compare registers, and 16-bit and 32-bit cyclic redundancy checkers (CRC16, CRC32).

[0019] The filtering module 201 includes a tunable filter chip (such as the MAX263 / 264), whose center frequency, Q value, and operating mode are selected via pin-bound inputs. Various bandpass, low-pass, high-pass, notch, and all-pass filters can be implemented without the use of external components, and it includes a non-dedicated operational amplifier. Both devices contain two second-order filter sections. An input clock and a 5-bit programming input allow for high-precision setting of the filter center / cutoff frequency. The Q programming range is also 0.5 to 64. Independent clock inputs for each filter half can be used with an external clock or crystal, with an operating center frequency up to 57kHz. For example, in the MAX263 / 264, the filtering parameters (including order, cutoff frequency, etc.) of the MAX263 can be controlled by controlling the high and low levels of Q0-Q6.

[0020] The gain module includes a programmable gain instrumentation amplifier (such as the INA351) with an integrated reference buffer, offering four gain options selectable via a toggle gain selection (GS) pin. Built with precision-matched integrated resistors, it eliminates the need for precision or highly matched external resistors, saving BOM costs, surface mount processing costs, and board space. The tri-amplifier architecture provides enhanced performance. The device achieves a minimum CMRR of 86dB and a maximum gain error accuracy of 0.1% across all gain options, along with a maximum offset voltage of 1.3mV, while consuming only a maximum quiescent current of 135μA. The INA351 features an integrated shutdown option that shuts down the amplifier during idle periods, further conserving power in battery-powered applications.

[0021] The adaptive relay module includes multiple signal processing paths configured in parallel, and each signal processing path includes a corresponding filtering module 201 and a gain module 202.

[0022] Furthermore, the adaptive relay device 2 and the signal acquisition device 3 interact via a digital communication line, which can be based on communication methods such as RS485.

[0023] Furthermore, this application embodiment also provides a method for operating an adaptive relay device. In this method, the adaptive relay device 2, based on signal characteristics, divides the analog signal into multiple signals according to its frequency components using a multi-path tunable filter chip. The signals are then amplified separately by a programmable gain instrumentation amplifier with an integrated reference buffer, based on the energy of different bandwidths. Typically, the gain of high-frequency, weak signals containing early unit fault characteristics is set to a higher value. A mixed-signal microcontroller tracks and identifies signal characteristics, selects appropriate filtering and gain parameters, and transmits the parameters and settings to a signal acquisition device via RS485 or similar methods for signal reconstruction.

[0024] Specifically, the GPIO pins (P1-PJ) of the control module are connected to the control pins (Q0-Q6) of the filter module. The filtering mode (high-pass, low-pass, band-pass, etc.) and filtering parameters (filter order, corner frequency, etc.) of the filter module are controlled by combining high and low levels on these control pins. The GPIO pins (P1-PJ) of the control module are also connected to the control pins (GS) of the gain module. The gain of the gain module is controlled by adjusting the high and low levels on the GS control pins.

[0025] It should be noted that the MSP430FR597x, MAX263 / 264, and INA351 mentioned above are all existing typical designs. Their internal circuit structures, pin definitions, and specific control logic are all standard configurations in this field, so their circuit details and control logic will not be described in detail here.

[0026] As can be seen, the adaptive repeater 2 receives the analog signal from the signal source 1, performs adaptive repeating, and then transmits it to the signal acquisition device 3 over a long distance, ensuring that the analog signal is not distorted and key information is not lost during long-distance transmission. It should be noted that before the signal is formally acquired, the signal acquisition device 3 and the signal repeater 2 enter a pre-trigger mode, using a binary search method to find a suitable combination of bandwidth and gain.

[0027] Binary search is an efficient search algorithm suitable for quickly locating a target element in a sorted array (with gain and bandwidth options). Its core idea is to halve the problem size by continuously narrowing the search range, thus achieving logarithmic time complexity.

[0028] The specific steps of the binary search method are as follows: S1. Initial state: Use the entire array as the search range, and define the left and right boundaries as low and high.

[0029] S2. Calculate the middle position: Find the middle element using the formula mid = low + (high - low) / / 2.

[0030] S3. Compare target values: If the middle element equals the target value, return its index. If the target value is less than the middle element, narrow the search to the left half. If the target value is greater than the middle element, narrow the search to the right half.

[0031] S4. Repeat steps 2 and 3 until the target value is found or the search range is empty.

[0032] Example 2: Based on Embodiment 1, Embodiment 2 of this application provides another intelligent adaptive relay device for state monitoring analog signals, such as... Figure 2 As shown, it includes: an adaptive relay device 2, a signal source 1, and a signal acquisition device 3; The signal source 1 is connected to the signal input terminal of the adaptive relay device 2 via an analog signal line, and the signal output terminal of the adaptive relay device 2 is connected to the signal acquisition device 3 via an analog signal line or a digital communication line.

[0033] The signal source 1 is a secondary instrument.

[0034] It should be noted that the parts in this embodiment that are the same as or similar to those in Embodiment 1 can be referred to each other, and will not be repeated in this application.

Claims

1. A state monitoring analog signal intelligent adaptive relay device, characterized in that, include: The signal input terminal is used to receive analog signals from the signal source (1); An adaptive relay module, connected to the signal input terminal, is used to process the received analog signal; The signal output terminal is connected to the adaptive relay module and is used to transmit the processed analog signal to the signal acquisition device (3). The adaptive relay module includes: A filtering module (201) is used to filter the analog signal; Gain module (202) is used to amplify the filtered signal; The control module (203) is connected to the filtering module (201) and the gain module (202) respectively, and is used to control the filtering parameters of the filtering module (201) and the gain parameters of the gain module (202) according to the characteristics of the analog signal.

2. The intelligent adaptive relay device for state monitoring analog signals according to claim 1, characterized in that, The control module (203) includes a mixed-signal microcontroller.

3. The intelligent adaptive relay device for state monitoring analog signals according to claim 2, characterized in that, The filtering module (201) includes a tunable filter chip.

4. The intelligent adaptive relay device for state monitoring analog signals according to claim 3, characterized in that, The gain module includes a programmable gain instrumentation amplifier with an integrated reference buffer.

5. The intelligent adaptive relay device for state monitoring analog signals according to claim 4, characterized in that, The adaptive relay module includes multiple signal processing paths configured in parallel, and each signal processing path includes a corresponding filtering module (201) and gain module (202).

6. A state monitoring analog signal intelligent adaptive relay device, characterized in that, include: The adaptive relay device (2), signal source (1), and signal acquisition device (3) as described in any one of claims 1 to 5; The signal source (1) is connected to the signal input terminal of the adaptive relay device (2) via an analog signal line, and the signal output terminal of the adaptive relay device (2) is connected to the signal acquisition device (3) via an analog signal line or a digital communication line.

7. The intelligent adaptive relay device for state monitoring analog signals according to claim 6, characterized in that, The signal source (1) is a secondary instrument.

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