This invention relates to the field of data evidence storage technology, and discloses an industrial
instrument data evidence storage
middleware and its pulse atomization signature method. The
middleware includes a
physical interface layer and a
microcontroller unit (MCU). The
transceiver circuit of the
physical interface layer includes: an RC inverse attenuation network, connected in series in the receiving channel, attenuating the inverse command
signal level to below the standard
transceiver differential identification threshold, realizing one-way monitoring and
authorization at the
physical layer; and an optocoupler isolation circuit, connected in parallel in the pulse input channel, with its output directly connected to the MCU's highest priority external interrupt (EXTI) pin, forming a hard-
coupled pulse triggering path. After EXTI triggering, the MCU enters the highest priority ISR, atomically locking the original evidence to a volatile buffer. After exiting the ISR, it asynchronously completes hash and PUF-derived private
key signature operations in the background and sends the evidence storage frame using the
bus idle window. The evidence storage data is written to the NVM
logical partition through the ZoneLock mechanism and is irreversibly locked. Combined with chained hash
verification,
data integrity and timing are ensured.