High-frequency high-precision data acquisition platform

Abstract

A high-frequency high-precision data acquisition platform relates to the field of data acquisition. The utility model aims to solve the problems of insufficient sampling frequency and low precision of the conventional general data acquisition platform. According to the high-frequency high-precision data acquisition platform provided by the utility model, data to be acquired are input to the analog-to-digital conversion circuit in the form of analog signals through the analog signal acquisition channel of the input module, and the analog signal output end of the analog-to-digital conversion circuit is connected with the analog signal input end of the digital-to-analog conversion circuit. The analog signal output end of the digital-to-analog conversion circuit is connected with the analog signal input end of the active low-pass filter circuit, and the sampling frequency control signal output end of the master control module is connected with the sampling frequency control signal input end of the input module. The device is suitable for being used in laboratories and scenes with long sampling periods and complex working environments.

Description

Technical Field

[0001] The utility model belongs to the field of data collection. Background Art

[0002] The data acquisition system is an electronic device used to collect, transmit and process various signals and data. With the development of technology, there are higher requirements for data in various environments. There are many types of existing data acquisition equipment, but for specific fields, such as high-speed train bearing fault diagnosis, the general data acquisition platform usually cannot meet the high-frequency and high-precision data acquisition requirements at the same time due to insufficient sampling frequency and insufficient precision. Utility Model Content

[0003] The utility model aims to solve the problems of insufficient sampling frequency and low precision of the existing general data acquisition platform, and now provides a high-frequency and high-precision data acquisition platform.

[0004] A high-frequency and high-precision data acquisition platform comprises: an input module, a preprocessing module and a main control module, wherein the input module comprises an analog-to-digital conversion circuit, and the preprocessing module comprises a digital-to-analog conversion circuit and an active low-pass filter circuit;

[0005] The data to be collected is input into the analog-to-digital conversion circuit in the form of an analog signal through the analog signal collection channel of the input module, the analog signal output end of the analog-to-digital conversion circuit is connected to the analog signal input end of the digital-to-analog conversion circuit, the analog signal output end of the digital-to-analog conversion circuit is connected to the analog signal input end of the active low-pass filter circuit, and the sampling frequency control signal output end of the main control module is connected to the sampling frequency control signal input end of the input module.

[0006] Furthermore, the above main control module includes a data processing API interface.

[0007] Furthermore, the above-mentioned high-frequency and high-precision data acquisition platform also includes a transmission module, and the filter signal output end of the active low-pass filter circuit is connected to the filter signal input end of the transmission module, and the filtered acquisition signal is transmitted outwardly through the transmission module.

[0008] Furthermore, the transmission module sends the collected data to the host computer through the UDP protocol and stores the data.

[0009] Furthermore, the above-mentioned high-frequency and high-precision data acquisition platform also includes a power supply module, which is used to supply power to the input module, the preprocessing module, the main control module and the transmission module.

[0010] Furthermore, the above-mentioned input module includes two analog signal acquisition channels.

[0011] Furthermore, the main control module controls the sampling frequency of the input module to be 50kHZ / s-100kHZ / s.

[0012] Furthermore, the above input module performs analog-to-digital conversion at 24 bits.

[0013] A high-frequency and high-precision data acquisition platform also includes a dustproof and heat-dissipating shell, and the input module, preprocessing module, main control module and transmission module are all located inside the dustproof and heat-dissipating shell.

[0014] Furthermore, a fixing connection device is provided at the bottom of the dustproof heat dissipation housing for fixing the dustproof heat dissipation housing on a supporting table.

[0015] The high-frequency and high-precision data acquisition platform described in the utility model can perform high-frequency and high-precision data acquisition. The data acquisition platform is compatible with various types of sensors, is easy to use, has high precision, and has strong applicability when used. During use, it is easy to install, small in size, and convenient to save space, and is suitable for use in laboratories, long sampling cycles, and complex working environments. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a structural diagram of a high-frequency and high-precision data acquisition platform. DETAILED DESCRIPTION

[0017] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work belong to the scope of protection of the utility model. It should be noted that the embodiments in the utility model and the features in the embodiments can be combined with each other without conflict.

[0018] Specific implementation method 1: refer to Figure 1 The present embodiment is described in detail. A high-frequency and high-precision data acquisition platform described in the present embodiment includes: an input module, a preprocessing module, a main control module, a transmission module, a power supply module and a dustproof and heat dissipation housing.

[0019] In this embodiment, the input module includes two analog signal acquisition channels, which can collect two analog signal data at the same time. The analog signal can be converted into a digital signal through the analog-to-digital conversion circuit of the input module and saved in a common data format. It can also collect a variety of sensor signals, such as acceleration, pressure, temperature, flow, frequency, switching quantity, etc. The preprocessing module is equipped with a digital-to-analog conversion circuit and uses an active low-pass filter circuit known for its high precision to ensure that the signal is accurate and reliable. In order to ensure the high-frequency characteristics of the data acquisition platform, the main control module uses an external high-frequency chip to provide a high sampling rate for each channel.

[0020] The specific workflow is as follows:

[0021] The data to be collected is input into the analog-to-digital conversion circuit in the form of an analog signal through the analog signal collection channel of the input module. The analog signal output end of the analog-to-digital conversion circuit is connected to the analog signal input end of the digital-to-analog conversion circuit. The analog signal output end of the digital-to-analog conversion circuit is connected to the analog signal input end of the active low-pass filter circuit. The sampling frequency control signal output end of the main control module is connected to the sampling frequency control signal input end of the input module. The filter signal output end of the active low-pass filter circuit is connected to the filter signal input end of the transmission module, and the filtered collection signal is transmitted to the outside through the transmission module. The power supply module is used to supply power to the input module, the preprocessing module, the main control module and the transmission module.

[0022] This implementation takes into account the dust prevention problem when the system is in a harsh working environment and runs for a long time. The input module, preprocessing module, main control module and transmission module are all located inside the dustproof heat dissipation housing to ensure the safe and stable operation of the data acquisition system. A fixed connection device is provided at the bottom of the dustproof heat dissipation housing to fix the dustproof heat dissipation housing on the support table. Considering the heat dissipation and dust prevention problems in harsh working environments and long-term operation, the dustproof heat dissipation housing needs to be closed when the data acquisition platform is working.

[0023] The main control module includes a data processing API interface, which allows users to process data in real time and in a personalized manner according to their own needs. The transmission module sends the collected data to the host computer through the UDP protocol and stores the data. The host computer provides a user-friendly interactive interface, allowing users to monitor data conditions in real time and adjust data acquisition parameters. The host computer uses high-speed, high-capacity storage devices, combined with a more stable data transmission protocol, to achieve efficient data storage and transmission of data while ensuring data security and integrity.

[0024] This implementation can match various types of sensors, covering multiple fields, such as environmental monitoring, industrial production or health care, to obtain various types of high-frequency and high-precision data. High-performance data acquisition equipment designed for different sensor types has the characteristics of multi-channel, high sampling rate, low noise, etc., and can capture the data signal output by the sensor in real time and accurately. The data input module can make different, multi-channel I / O terminal line connections according to the type and number of input sensors to match the needs of multi-type, multi-channel data acquisition.

[0025] When using the high-frequency and high-precision data acquisition platform described in this embodiment, the input module is first used to match different types of sensors. According to the data acquisition principle of the sensor, the input module is equipped with different types of wiring methods. In order to make the data acquisition platform have a higher sampling frequency and data processing speed, a higher frequency external crystal oscillator is used so that the sampling rate of each channel can reach 50kHZ / s-100kHZ / s. Each data acquisition I / O port provides 24-Bit analog-to-digital conversion and uses active low-pass filtering to ensure the high accuracy of the collected data.

[0026] In summary, the utility model has a simple overall structure, is easy to use, has high precision, and has strong applicability when used. During use, it is easy to install, has a small size and saves space, and has high compatibility with various sensors. It is very suitable for use in laboratories, where the sampling cycle is long and the working environment is complex, and has good application prospects.

[0027] Although the present invention is described herein with reference to specific embodiments, it should be understood that these embodiments are merely examples of the principles and applications of the present invention. It should therefore be understood that many modifications may be made to the exemplary embodiments, and other arrangements may be designed without departing from the spirit and scope of the present invention as defined by the appended claims. It should be understood that different dependent claims and features described herein may be combined in a manner different from that described in the original claims. It may also be understood that features described in conjunction with individual embodiments may be used in other described embodiments.

Claims

1. A high-frequency and high-precision data acquisition platform, characterized in that: include: An input module, a preprocessing module and a main control module, wherein the input module includes an analog-to-digital conversion circuit, and the preprocessing module includes a digital-to-analog conversion circuit and an active low-pass filter circuit; The data to be collected is input into the analog-to-digital conversion circuit in the form of an analog signal through the analog signal collection channel of the input module, the analog signal output end of the analog-to-digital conversion circuit is connected to the analog signal input end of the digital-to-analog conversion circuit, the analog signal output end of the digital-to-analog conversion circuit is connected to the analog signal input end of the active low-pass filter circuit, and the sampling frequency control signal output end of the main control module is connected to the sampling frequency control signal input end of the input module.

2. A high-frequency and high-precision data acquisition platform according to claim 1, characterized in that: The main control module includes a data processing API interface.

3. A high-frequency and high-precision data acquisition platform according to claim 1 or 2, characterized in that: It also includes a transmission module, and the filter signal output end of the active low-pass filter circuit is connected to the filter signal input end of the transmission module, and the filtered collection signal is transmitted outwardly through the transmission module.

4. A high-frequency and high-precision data acquisition platform according to claim 3, characterized in that: The transmission module sends the collected data to the host computer through the UDP protocol and stores the data.

5. A high-frequency and high-precision data acquisition platform according to claim 3, characterized in that: It also includes a power supply module, which is used to supply power to the input module, the preprocessing module, the main control module and the transmission module.

6. A high-frequency and high-precision data acquisition platform according to claim 1, 2, 4 or 5, characterized in that: The input module includes two analog signal acquisition channels.

7. A high-frequency and high-precision data acquisition platform according to claim 6, characterized in that: The main control module controls the sampling frequency of the input module to be 50kHZ / s-100kHZ / s.

8. A high-frequency and high-precision data acquisition platform according to claim 6, characterized in that: The input module performs analog-to-digital conversion at 24 bits.

9. A high-frequency and high-precision data acquisition platform according to claim 3, characterized in that: It also includes a dustproof and heat-dissipating shell, and the input module, pre-processing module, main control module and transmission module are all located inside the dustproof and heat-dissipating shell.

10. A high-frequency and high-precision data acquisition platform according to claim 9, characterized in that: A fixing connection device is provided at the bottom of the dustproof heat dissipation shell, which is used to fix the dustproof heat dissipation shell on the supporting table.

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