Software-based Implementation
With the advancement of microelectronics, microprocessors have become faster and more affordable, leading to their widespread use in instrumentation. This shift allows functions that previously required dedicated hardware-and demanded high real-time performance-to be implemented via software. Software techniques can even effectively resolve issues that were once difficult or impossible to address using hardware circuits alone. The evolution of digital signal processing (DSP) technology and the widespread adoption of high-speed DSP chips have vastly enhanced the signal processing capabilities of instruments. Common signal processing methods-such as digital filtering, FFT, correlation, and convolution-rely on algorithms primarily composed of iterative multiplication and addition operations. While executing these operations in software on a general-purpose microcomputer would be time-consuming, DSP chips perform them in hardware, significantly boosting instrument performance and driving the widespread application of DSP technology in the field of instrumentation.
Integration
As Large-Scale Integration (LSI) technology has advanced, integrated circuits have achieved higher densities, smaller footprints, and increasingly complex internal structures and powerful functionalities. This has greatly increased the level of integration for individual modules and the instrument system as a whole. Modular functional hardware provides robust support for modern instrumentation, offering greater flexibility and streamlined hardware configurations; for instance, adding a specific testing function requires only the addition of a few modular hardware components and the invocation of the corresponding software to utilize them.
Parameter Tuning
With the development of various field-programmable devices and in-system programming technologies, instrument parameters-and even system structures-no longer need to be fixed at the design stage; instead, they can be configured in real-time and dynamically modified at the deployment site.
Generalization
Modern instrumentation emphasizes the role of software. A general-purpose hardware platform is created by selecting one or more versatile, standardized hardware modules, which can then be configured or expanded into instruments and systems with diverse functions simply by invoking different software applications.
