Time Synchronous Hybrid Analog and Digital Sensor Data Acquisition System and Method Thereof

Abstract

The present disclosure discloses a time synchronous hybrid analog and digital sensor data acquisition system and method, comprising analog sensors, digital modules, digital sensors, hubs for networking a plurality of heterogeneous sensors, a local-area network device and a data processing terminal. The present disclosure solves the problem that data cannot be compared due to time difference in acquisition for the reason that the sampling time of different sensors cannot be synchronized precisely in the existing experiments and practical engineering, and also solves the problems of single function, low integration level and manpower consumption when different sensor instruments work separately. The data acquisition system of the present disclosure can be directly connected to various heterogeneous sensors to realize synchronous acquisition, synchronous transmission and simple and fast operation. The present disclosure greatly increases the time precision, amplitude precision and efficiency of synchronous acquisition, reduces the labor cost, and has wide application prospect.

Claims

1. A time synchronous hybrid analog and digital sensor data acquisition system, comprising analog sensors, digital modules, digital sensors, hubs, a local-area network device and a data processing terminal, wherein the hubs are in data connection with the data processing terminal through the local-area network device; and the analog sensors are connected with the digital modules; each digital module comprises a signal conditioning module, a signal amplification module and an A/D conversion module which are electrically connected in sequence through a control circuit, and also comprises a data interface connected with the hub and an interface connected with a clock synchronization circuit integrated on the hub; the clock synchronization circuit is generated by the hub and used for synchronizing a synchronization signal broadcast by the data processing terminal, and the synchronization signal is generated by the hub and received by the connected digital module or digital sensor so as to realize synchronous data acquisition of the analog sensor and the digital sensor.

2. The time synchronous hybrid analog and digital sensor data acquisition system according to claim 1, wherein each digital module also comprises an identity recognition module.

3. The time synchronous hybrid analog and digital sensor data acquisition system according to claim 1, wherein each digital module is also integrated with an Soc chip.

4. The time synchronous hybrid analog and digital sensor data acquisition system according to claim 1, wherein each hub is a 485 hub used for converting 485 bus data interfaces of the analog sensor and the digital module to the data interface of the local area network.

5. A signal processing method using the time synchronous hybrid analog and digital sensor data acquisition system of claim 1, comprising steps of: step 1: sensing the value of a measured object by the analog sensors and the digital sensors in the system, carrying out digital compensation and clock synchronization control, and digitally correcting and compensating the measured value; step 2: centralizing the data processed in step 1 and sensed by the analog sensors and the digital sensors by the hubs through data connection and outputting the data to the local-area network device through an output end; step 3: synthesizing the data transmitted from the hubs by the local-area network device, and then transmitting the data to the data processing terminal via the network for processing; step 4: comparing and visually displaying the data based on the timeline by the data processing terminal through programs, and outputting the monitoring result according to the monitoring needs.

6. The signal processing method according to claim 5, also comprising the step of presetting parameters for and sending an instruction to the digital sensors by the data processing terminal and the step of carrying out sensing and feedback by the digital sensors according to the parameter instruction.

7. The signal processing method according to claim 5, wherein the digital correction and compensation method in step 1 is one of least squares curve fitting, polynomial curve fitting, broken line fitting and table look-up interpolation fitting.

Description

DESCRIPTION OF DRAWINGS

[0023] FIG. 1 is a structural schematic diagram of an embodiment of a time synchronous hybrid analog and digital sensor data acquisition system of the present disclosure;

[0024] FIG. 2 is a structural schematic diagram of a circuit of a time synchronous digital sensor of an embodiment of a time synchronous hybrid analog and digital sensor data acquisition system of the present disclosure;

[0025] FIG. 3 is a flow chart of an embodiment of a signal processing method of a time synchronous hybrid analog and digital sensor data acquisition system of the present disclosure.

DETAILED DESCRIPTION

[0026] The preferred embodiment of the present disclosure will be further described below in detail in combination with the drawings. Apparently, the described embodiments are merely part of the embodiments of the present disclosure, not all of the embodiments. Based on the embodiments in the present disclosure, all other embodiments obtained by those ordinary skilled in the art without contributing creative labor will belong to the protection scope of the present disclosure.

[0027] The present disclosure is further described in detail in combination with the drawings and specific embodiments.

[0028] As shown in FIG. 1 and FIG. 2, the time synchronous hybrid analog and digital sensor data acquisition system comprises analog sensors, digital modules, digital sensors, hubs for networking a plurality of sensors, a local-area network device and a data processing terminal, wherein each digital module comprises a signal conditioning module, a signal amplification module and an A/D conversion module which are electrically connected in sequence through a control circuit, a data interface connected with the control circuit, and a clock synchronization circuit integrated on the control circuit, the digital modules and the digital sensors are in data connection with the hubs, and the hubs are in data connection with the data processing terminal through the local-area network device.

[0029] As shown in FIG. 2, each digital module also comprises an automatic identity recognition module which is integrated on the control circuit, and the sensors are automatically recognized after being connected to the network so that networking is easier.

[0030] Each digital module also comprises a constant current control module used for powering the sensor.

[0031] The control circuit is also integrated with an Soc chip which can be programed externally so as to process the sensor data accordingly. For example, an algorithm program is set in the Soc chip to executing compensated operation on the sensor data.

[0032] In the embodiment, each hub is a 485 hub that can convert the 485 bus interface of the sensor to the interface of the local area network, which is convenient to form a larger network system. The 485 hub constructs a network on the spot, which simplifies the complexity of networking lines.

[0033] The local-area network device comprises a router, one end of the router can be in data connection with a plurality of 485 hubs, and the other end is in data connection with the data processing terminal.

[0034] The data connection between the router and the data processing terminal is fiber-optic connection. Fiber optic network transmission breaks through the bottleneck of the transmission rate of traditional 485, which enables multiple hub signals to be centralized and then transmitted via the wide area network through the router.

[0035] As shown in FIG. 1, FIG. 2 and FIG. 3, in combination with the time synchronous hybrid analog and digital sensor data acquisition system, the present disclosure also provides a signal processing method of the time synchronous hybrid analog and digital sensor data acquisition system. The sensor initialization run program and the data processing terminal startup run program are common knowledge and software programming design problems, and thus are not described herein. Specifically, the signal processing method comprises the following steps:

[0036] Step 1: sensing the value of a measured object by the analog sensors and the digital sensors in the system, carrying out digital compensation and clock synchronization control, and digitally correcting and compensating the measured value;

[0037] Step 2: centralizing the data processed in step 1 and sensed by the analog sensors and the digital sensors by the hubs through data connection and outputting the data to the local-area network device through an output end;

[0038] Step 3: synthesizing the data transmitted from the hubs by the local-area network device, and then transmitting the data to the data processing terminal via the network for processing;

[0039] Step 4: comparing and visually displaying the data based on the timeline by the data processing terminal through programs, and outputting the monitoring result according to the monitoring needs.

[0040] Here, the received sensor data can be sorted into tables, curves and acoustic-optical signals through program processing of the data processing terminal to provide operators with alert and analytical research observation data and so on.

[0041] As shown in FIG. 3, the signal processing method of the time synchronous hybrid analog and digital sensor data acquisition system also comprises the step of presetting parameters for and sending an instruction to the digital sensors by the data processing terminal and the step of carrying out sensing and feedback to return the operating data or state by the digital sensors according to the parameter instruction.

[0042] Finally, it should be noted that the above embodiment is only a preferred embodiment of the present disclosure, and is not intended to limit the present disclosure. Although the present disclosure is described in detail with reference to the above embodiment, those skilled in the art may still modify the technical solution recorded in the above embodiment, or equivalently replace some of the technical features. Any modification, equivalent replacement, improvement, etc. made within the spirit and the principle of the present disclosure shall be included within the protection scope of the present disclosure.