Driver of Universal Data Acquisition Card Based on LabVIEW

There are three ways to drive a general data acquisition card in LabVIEW.
First, use the Port I/O icon in the Advanced sub-template in the Function template of LabVIEW to program directly, and read data directly from a specific address memory by manually setting the base address. If the sampling speed requirement is not high, it is a very convenient and intuitive method; second, use the CIN (Code Interface Node) icon in the Advanced sub-template in the Functions template of LabVIEW, which is suitable for directly calling codes written in text programming languages ​​(such as VC). The method of using the CIN node to generate the subVI of the A/D driver can give full play to the high conversion speed of A/D and obtain a high sampling rate. However, the programming is more complicated and cannot be directly modified by LabVIEW; third, use the Call Library Function Node icon in the Advanced sub-template in the Functions template of LabVIEW to dynamically link the DLL library function of the data acquisition card. DLL is actually a function library. The functions in the DLL are called and connected at any time only when the application is running. Compared with static link libraries, DLL can share functions and resources in the library with other applications. Many data acquisition card manufacturers provide drivers in the form of DLL library functions. Users can use some DLL link library programming tools, such as VC and VB, to write applications to call it. Similarly, LabVIEW also provides this function, which is the icon Call Library Function Node, which is placed in the Advanced sub-template within the Function template. By setting this node, the DLL can be directly called. ?
The third method is used in this research system to realize online cutting force data acquisition. The ISA bus-based data acquisition card ACL-8111 is used, and the DLL is directly provided by the manufacturer. ?

Input signal range: ±5V, ±2.5V, ±1.25V, ±0.625V, ±0.3125V (software programming selection); maximum sampling frequency: 30kHz; trigger mode: software, on-board programmable timer or external trigger; data transmission: program control, interrupt control; IRQ level: programmable IRQ2, 3, 4, 5, 6, 7; number of channels: 8 single-ended channels.
The input signal range of this system is ±5V, the sampling frequency is 2000Hz, the A/D data conversion trigger mode uses on-board programmable timer trigger, the data transmission uses interrupt control, the interrupt level is set to 5, the number of channels is 3, and the three channels collect and transmit the X, Y, and Z cutting forces respectively.
The analog signal to be collected is amplified by the charge amplifier, and different gains are selected according to the pre-set; the output signal is A/D converted. After the conversion is completed, the 12-bit conversion result is automatically stored in the data register, and then the data is taken out through the interrupt control and sent to the computer memory for processing. When in use, insert the acquisition card directly into the computer's ISA slot and use its pre-set base address 220H.