Sensor signal output system

Abstract

The utility model discloses a sensor signal output system, which relates to the technical field of sensors, and comprises a signal acquisition module, a signal processing module, a signal conversion module, a signal output module and a system adjusting module. Through the arrangement of the signal acquisition module, the plug-and-play of an analog / digital / bus type sensor is realized, the compatibility is higher, and the reliability is higher. Through the arrangement of the signal conversion module, a 24-bit ADC, a precise reference source and a multi-stage calibration module are adopted, and linearization compensation and a digital filtering algorithm are combined, so that measurement error 1t can be realized; according to the technical scheme of the utility model, high-precision scene requirements are met, and a 0-10V / 4-20mA standard interface, a digital quantity output integrated high-speed GPIO (General Purpose Input / Output) interface, a serial interface and an Ethernet interface are provided through the arrangement of the signal output module.

Description

TECHNICAL FIELD

[0001] The utility model relates to sensor technical field especially relates to a sensor signal output system. BACKGROUND

[0002] Sensor is can feel the information of measured quantity, and can feel the information, according to certain rule change into electric signal or other required form's information output, to satisfy the detection device of information's transmission, processing, storage, display, record and control etc.

[0003] In prior art, the module integration of sensor is low, the compatibility of different types of sensors (analog / digital / bus type) is insufficient, and the signal processing procedure lacks subdivision, the realization of nonlinear compensation, noise suppression and other functions is not flexible enough, the output interface is single, it is difficult to simultaneously satisfy the diversified output demand of analog quantity, digital quantity and network signal, the power management and system control are independently designed, leading to low power consumption control and fault response efficiency. UTILITY MODEL CONTENT

[0004] The utility model discloses a sensor signal output system, which can realize high module integration of sensor, high compatibility of different types of sensors (analog / digital / bus type), flexible realization of nonlinear compensation, noise suppression and other functions, multiple output interfaces, simultaneous satisfaction of diversified output demand of analog quantity, digital quantity and network signal, independent design of power management and system control, and high power consumption control and fault response efficiency.

[0005] In order to realize the above-mentioned purpose, the utility model adopts the following technical scheme: a sensor signal output system, comprising a signal acquisition module, a signal processing module, a signal conversion module, a signal output module and a system adjustment module.

[0006] The signal acquisition module comprises a sensor access adaptation module, an analog signal conditioning module, a digital signal decoding module and a multi-channel switching module.

[0007] The signal processing module comprises an analog signal linearization module, a signal filtering module, a data calibration module, a feature extraction module and a cache management module.

[0008] The signal conversion module comprises an analog-to-digital conversion module, a digital-to-analog conversion module, a level conversion module and a protocol conversion module.

[0009] The signal output module comprises an analog output module, a digital output module and an interaction module.

[0010] The system adjustment module comprises a power management module and a system control module.

[0011] Preferably, the output end of the sensor access adaptation module is divided into an analog signal output end, a digital signal output end and a bus signal output end, the analog signal output end is electrically connected with the input end of the analog signal conditioning module, the digital signal output end is electrically connected with the input end of the digital signal decoding module, and the bus signal output end is electrically connected with the input end of the multi-channel switching module.

[0012] Preferably, the output end of the analog signal conditioning module is electrically connected with the input end of the analog-digital conversion module, the input end of the analog signal conditioning module is electrically connected with the output end of the system control module, the output end of the digital signal decoding module is electrically connected with the input end of the signal filtering module, the input end of the digital signal decoding module is electrically connected with the output end of the system control module, and the input end of the multi-channel switching module is electrically connected with the output end of the sensor access adaptation module.

[0013] Preferably, the output end of the analog signal linearization module is electrically connected with the input end of the signal filtering module, the output end of the signal filtering module is electrically connected with the input end of the data calibration module, the output end of the data calibration module is electrically connected with the input end of the feature extraction module, the output end of the feature extraction module is electrically connected with the input end of the cache management module, the output end of the cache management module is electrically connected with the input end of the level conversion module, the protocol conversion module and the digital quantity output module, and the input end of the cache management module is electrically connected with the output end of the system control module.

[0014] Preferably, the output end of the analog-digital conversion module is electrically connected with the input end of the level conversion module and the protocol conversion module, the input end of the level conversion module is electrically connected with the output end of the cache management module, the output end of the level conversion module is electrically connected with the input end of the protocol conversion module, the output end of the protocol conversion module is electrically connected with the input end of the digital quantity output module, and the input end of the digital-analog conversion module is electrically connected with the output end of the cache management module.

[0015] Preferably, the output end of the digital-analog conversion module is electrically connected with the input end of the analog quantity output module, the output end of the power management module is electrically connected with the power input end of the signal acquisition module, the signal processing module, the signal conversion module and the signal output module, and the output end of the system control module is electrically connected with the control input end of the signal acquisition module, the signal processing module, the signal conversion module and the signal output module.

[0016] Compared with the prior art, the utility model has the advantages and positive effects that:

[0017] In this invention, the signal acquisition module enables plug-and-play functionality for analog / digital / bus-type sensors, making it compatible with over 95% of industrial sensors on the market, thus offering higher compatibility. The signal conversion module, employing a 24-bit ADC, a precision reference source, and a multi-level calibration module, combined with linearization compensation and digital filtering algorithms, achieves a measurement error of <0.1%FS, meeting the demands of high-precision scenarios. The signal output module provides a 0-10V / 4-20mA standard interface, integrating high-speed GPIO, serial, and Ethernet interfaces for digital output. The local interaction module supports touchscreen operation and data storage, meeting diverse output requirements. The system adjustment module, using a three-level architecture with a PMIC, achieves dynamic power consumption control and various protections across the entire chain, ensuring stable system operation in complex environments. It also supports independent upgrades for individual modules, reserves calibration and redundant interfaces, reduces system expansion costs, and adapts to different application scenarios. Attached Figure Description

[0018] Figure 1 A system diagram of a sensor signal output system is provided for this utility model;

[0019] Figure 2 This utility model provides a system diagram of a signal acquisition module in a sensor signal output system;

[0020] Figure 3 This utility model provides a system diagram of a signal processing module in a sensor signal output system;

[0021] Figure 4 This utility model provides a system diagram of a signal conversion module in a sensor signal output system;

[0022] Figure 5 This utility model provides a system diagram of a signal output module in a sensor signal output system;

[0023] Figure 6 This invention provides a system diagram of a system adjustment module in a sensor signal output system.

[0024] Legend:

[0025] 1. Signal acquisition module; 11. Sensor access adapter module; 12. Analog signal conditioning module; 13. Digital signal decoding module; 14. Multi-channel switching module;

[0026] 2. Signal processing module; 21. Analog signal linearization module; 22. Signal filtering module; 23. Data calibration module; 24. Feature extraction module; 25. Buffer management module;

[0027] 3. Signal conversion module; 31. Analog-to-digital conversion module; 32. Digital-to-analog conversion module; 33. Level conversion module; 34. Protocol conversion module;

[0028] 4. Signal output module; 41. Analog output module; 42. Digital output module; 43. Interactive module;

[0029] 5. System adjustment module; 51. Power management module; 52. System control module. Detailed Implementation

[0030] To better understand the above-mentioned objectives, features, and advantages of this utility model, the present utility model will be further described below with reference to the accompanying drawings and embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0031] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the present invention is not limited to the specific embodiments disclosed in the following specification.

[0032] Example: Figures 1-6 As shown, this utility model provides a sensor signal output system, including a signal acquisition module 1, a signal processing module 2, a signal conversion module 3, a signal output module 4, and a system adjustment module 5;

[0033] The signal acquisition module 1 includes a sensor access adapter module 11, an analog signal conditioning module 12, a digital signal decoding module 13, and a multi-channel switching module 14. The output terminals of the sensor access adapter module 11 are divided into an analog signal output terminal, a digital signal output terminal, and a bus signal output terminal. The analog signal output terminal is electrically connected to the input terminal of the analog signal conditioning module 12 to transmit and process the analog signal output from the analog sensor. The digital signal output terminal is electrically connected to the input terminal of the digital signal decoding module 13 to transmit the digital signal output from the digital sensor. The bus signal output terminal is electrically connected to the input terminal of the multi-channel switching module 14 to provide a path for bus-type sensor signal transmission. The input terminal of the sensor access adapter module 11 is electrically connected to the output terminal of the system control module 52 to receive configuration and control commands from the system control module 52, such as turning the sensor excitation power supply on and off, and selecting the interface mode. The output terminal of the analog signal conditioning module 12 is electrically connected to the input terminal of the analog-to-digital converter module 31 to convert the conditioned signal into a digital signal. The processed analog signal is transmitted to the analog-to-digital conversion module 31 for digital processing. The input of the analog signal conditioning module 12 is electrically connected to the output of the system control module 52, receiving configuration instructions from the system control module 52 for gain, filtering parameters, etc. The output of the digital signal decoding module 13 is electrically connected to the input of the signal filtering module 22, and the input of the digital signal decoding module 13 is electrically connected to the output of the system control module 52, adjusting the decoding method and parameters according to the instructions of the system control module 52. The input of the multi-channel switching module 14 is electrically connected to the output of the sensor access adapter module 11, used to receive signals from different sensors. The output of the multi-channel switching module 14 outputs the selected sensor signal to the input of the analog signal conditioning module 12 or the digital signal decoding module 13 according to the selection result. The input of the multi-channel switching module 14 is electrically connected to the output of the system control module 52, and the system control module 52 controls the switching of channels according to preset priorities or other rules.

[0034] The sensor access adapter module 11 is equipped with an analog sensor interface, a digital sensor interface and a bus-type sensor interface, and integrates a reverse connection protection diode, a TVS electrostatic protection component and a sensor excitation power supply.

[0035] The analog signal conditioning module 12 includes a programmable gain amplifier, an anti-aliasing filter, and a thermocouple cold junction compensation circuit;

[0036] The digital signal decoding module 13 includes an encoder quadrature decoding circuit, an SPI / I2C / UART protocol parsing unit, and a Schmitt trigger signal shaping circuit;

[0037] The multi-channel switching module 14 consists of a high-speed analog switch array, a priority encoder, and an optocoupler isolation relay.

[0038] The signal processing module 2 includes an analog signal linearization module 21, a signal filtering module 22, a data calibration module 23, a feature extraction module 24, and a buffer management module 25. The output of the analog signal linearization module 21 is electrically connected to the input of the signal filtering module 22, transmitting the digital signal converted from the linearized analog signal to the signal filtering module 22 for further filtering. The output of the signal filtering module 22 is electrically connected to the input of the data calibration module 23, transmitting the filtered signal to the data calibration module 23 for error calibration. The output of the data calibration module 23 is electrically connected to the input of the feature extraction module 24, transmitting the calibrated signal to the feature extraction module 24 for feature parameter extraction. The output of the feature extraction module 24 is electrically connected to the input of the buffer management module 25, transmitting the extracted feature data to the buffer management module 25 for temporary storage. The output of block 25 is electrically connected to the input of level conversion module 33, protocol conversion module 34, and digital output module 42. According to the system requirements, the buffered data is output to the corresponding module for further processing or output. The input of buffer management module 25 is electrically connected to the output of system control module 52 and receives the configuration instructions of buffer strategy from system control module 52. Analog signal linearization module 21 integrates piecewise linear interpolation circuit and polynomial fitting correction algorithm module. Signal filtering module 22 includes FIR filter, IIR filter and adaptive filtering algorithm unit. Data calibration module 23 is equipped with zero drift compensation circuit, gain calibration signal injection interface and NIST standard part calibration process control unit. Feature extraction module 24 integrates statistical feature calculation unit, FFT spectrum analysis module and wavelet transform time-frequency analysis unit. Buffer management module 25 adopts double buffer queue and QSPI interface NOR Flash high-speed cache.

[0039] Signal conversion module 3 includes an analog-to-digital converter (ADC) module 31, a digital-to-analog converter (DAC) module 32, a level conversion module 33, and a protocol conversion module 34. The output of ADC module 31 is electrically connected to the inputs of DAC module 33 and protocol conversion module 34, transmitting the converted digital signal to DAC module 33 and protocol conversion module 34 for further processing. Signal output module 4 includes an analog output module 41, a digital output module 42, and an interaction module 43. The input of level conversion module 33 is electrically connected to the output of buffer management module 25, receiving signals requiring level conversion. The output of level conversion module 33 is electrically connected to the input of protocol conversion module 34. The output of protocol conversion module 34 is electrically connected to the input of digital output module 42, transmitting the level-converted signal to the corresponding module. The input of DAC module 32 is electrically connected to the output of buffer management module 25, receiving signals requiring analog-to-digital conversion. The analog-to-digital converter module 31 uses a 24-bit ADC and a precision reference source to support multi-channel synchronous sampling. The digital-to-analog converter module 32 includes a 16-bit high-speed DAC and a 5th-order elliptic reconstruction filter. The level conversion module 33 integrates a 3.3V / 5V bidirectional conversion chip and a 5kV isolation digital isolator. The protocol conversion module 34 includes a CAN to Modbus TCP gateway and an EtherCAT slave controller. The analog output module 41 has a 0-10V voltage output channel and a 4-20mA current output channel, and integrates an overcurrent protection fuse and an output short-circuit self-recovery circuit. The digital output module 42 includes a high-speed GPIO matrix with a 50MHz transmission rate, an RS-422 / RS-485 serial interface, and a Gigabit Ethernet RJ45 interface. The interactive module 43 integrates a 4.3-inch capacitive touch screen μC / GUI graphics library, an RGB LED status indicator matrix, and a microSD card storage interface.

[0040] The system regulation module 5 includes a power management module 51 and a system control module 52. The output of the digital-to-analog conversion module 32 is electrically connected to the input of the analog output module 41, transmitting the converted analog signal to the analog output module 41 for output. The output of the power management module 51 is electrically connected to the power input of the signal acquisition module 1, signal processing module 2, signal conversion module 3, and signal output module 4, providing a stable power supply for them. The output of the system control module 52 is electrically connected to the control input of the signal acquisition module 1, signal processing module 2, signal conversion module 3, and signal output module 4, sending configuration and control commands to coordinate control. The power management module 51 adopts a three-level architecture of AC / DC adapter + DC / DC module + LDO, integrating a power monitoring chip and a low-power PMIC. The system control module 52 uses a dual-core STM32H750VB, integrating the FreeRTOS real-time operating system and a 16-level task priority scheduling unit.

[0041] The specific settings and functions of this embodiment are described below. Signal acquisition module 1 enables plug-and-play functionality for analog / digital / bus-type sensors, adapting to over 95% of industrial sensors on the market, offering higher compatibility. Signal conversion module 3 employs a 24-bit ADC, a precision reference source, and a multi-level calibration module, combined with linearization compensation and digital filtering algorithms, achieving a measurement error of <0.1%FS, meeting the requirements of high-precision scenarios. Signal output module 4 provides a 0-10V / 4-20mA standard interface, integrating high-speed GPIO, serial, and Ethernet interfaces for digital output. The local interaction module supports touchscreen operation and data storage, meeting diverse output needs. System adjustment module 5 utilizes a three-level architecture with PMIC to achieve dynamic power consumption control and various protections across the entire chain, ensuring stable system operation in complex environments. It also supports independent upgrades for individual modules, reserves calibration and redundant interfaces, reduces system expansion costs, and adapts to different application scenarios.

[0042] The above are merely preferred embodiments of this utility model and are not intended to limit the utility model in any other way. Any person skilled in the art may make changes or modifications to the above-disclosed technical content to create equivalent embodiments for application in other fields. However, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of this utility model without departing from the technical solution of this utility model shall still fall within the protection scope of this utility model.

Claims

1. A sensor signal output system, characterized by: It comprises a signal acquisition module (1), a signal processing module (2), a signal conversion module (3), a signal output module (4) and a system adjustment module (5). The signal acquisition module (1) comprises a sensor access adaptation module (11), an analog signal conditioning module (12), a digital signal decoding module (13) and a multi-channel switching module (14). The signal processing module (2) comprises an analog signal linearization module (21), a signal filtering module (22), a data calibration module (23), a feature extraction module (24) and a cache management module (25). The signal conversion module (3) comprises an analog-to-digital conversion module (31), a digital-to-analog conversion module (32), a level conversion module (33) and a protocol conversion module (34). The signal output module (4) comprises an analog output module (41), a digital output module (42) and an interactive module (43). The system adjustment module (5) comprises a power management module (51) and a system control module (52).

2. A sensor signal output system according to claim 1, characterized in that: The output end of the sensor access adaptation module (11) is divided into an analog signal output end, a digital signal output end and a bus signal output end, the analog signal output end is electrically connected with the input end of the analog signal conditioning module (12), the digital signal output end is electrically connected with the input end of the digital signal decoding module (13), the bus signal output end is electrically connected with the input end of the multi-channel switching module (14), and the input end of the sensor access adaptation module (11) is electrically connected with the output end of the system control module (52).

3. A sensor signal output system according to claim 1, characterized in that: The output end of the analog signal conditioning module (12) is electrically connected with the input end of the analog-to-digital conversion module (31), the input end of the analog signal conditioning module (12) is electrically connected with the output end of the system control module (52), the output end of the digital signal decoding module (13) is electrically connected with the input end of the signal filtering module (22), the input end of the digital signal decoding module (13) is electrically connected with the output end of the system control module (52), and the input end of the multi-channel switching module (14) is electrically connected with the output end of the sensor access adaptation module (11).

4. The sensor signal output system of claim 1, wherein: The output end of the analog signal linearization module (21) is electrically connected with the input end of the signal filtering module (22), the output end of the signal filtering module (22) is electrically connected with the input end of the data calibration module (23), the output end of the data calibration module (23) is electrically connected with the input end of the feature extraction module (24), the output end of the feature extraction module (24) is electrically connected with the input end of the cache management module (25), the output end of the cache management module (25) is electrically connected with the input end of the level conversion module (33), the protocol conversion module (34) and the digital output module (42), and the input end of the cache management module (25) is electrically connected with the output end of the system control module (52).

5. The sensor signal output system of claim 1, wherein: The output end of the analog-digital conversion module (31) is electrically connected with the input end of the level conversion module (33) and the protocol conversion module (34), the input end of the level conversion module (33) is electrically connected with the output end of the cache management module (25), the output end of the level conversion module (33) is electrically connected with the input end of the protocol conversion module (34), the output end of the protocol conversion module (34) is electrically connected with the input end of the digital quantity output module (42), and the input end of the digital-analog conversion module (32) is electrically connected with the output end of the cache management module (25).

6. The sensor signal output system of claim 1, wherein: The output end of the digital-analog conversion module (32) is electrically connected with the input end of the analog quantity output module (41), the output end of the power management module (51) is electrically connected with the power input end of the signal collection module (1), the signal processing module (2), the signal conversion module (3) and the signal output module (4), and the output end of the system control module (52) is electrically connected with the control input end of the signal collection module (1), the signal processing module (2), the signal conversion module (3) and the signal output module (4).

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