Abstract: The present invention provides a point cloud data acquisition method and device under a situation of no GNSS signal. The method comprises: re-sampling line data acquired from a topographic map to obtain discrete line data; generating a full-second PPS pulse in a simulating manner; counting by using a distance measuring instrument, sampling the count, when it is detected that the full-second PPS pulse is received, calculating position information at a current moment; simulating a GNSS satellite protocol according to the position information at the current moment; parsing the GNSS satellite protocol by using a point cloud data acquisition module to complete time synchronization, and controlling a LiDAR to acquire point cloud data; parsing the GNSS satellite protocol by using an inertial measurement module, and recording attitude determination positioning data in real time to generate POS data; and optimizing the POS data to obtain accurate point cloud data.

Abstract: A preprocessing method for configuring a near field communication (NFC) smart card, includes: determining a card set belonging to a user; generating identifier information corresponding to the card set according to a non-contact parameter corresponding to a card included in the card set, the identifier information identifying at least one of a state of conflict or a state of compatibility between two cards included in the card set; and sending the identifier information to electronic equipment used by the user, such that the electronic equipment adds, to an NFC smart card according to the identifier information, at least two cards compatible with each other in the card set.

Abstract: The present invention provides a point cloud data acquisition method and device under a situation of no GNSS signal. The method comprises: re-sampling line data acquired from a topographic map to obtain discrete line data; generating a full-second PPS pulse in a simulating manner; counting by using a distance measuring instrument, sampling the count, when it is detected that the full-second PPS pulse is received, calculating position information at a current moment; simulating a GNSS satellite protocol according to the position information at the current moment; parsing the GNSS satellite protocol by using a point cloud data acquisition module to complete time synchronization, and controlling a LiDAR to acquire point cloud data; parsing the GNSS satellite protocol by using an inertial measurement module, and recording attitude determination positioning data in real time to generate POS data; and optimizing the POS data to obtain accurate point cloud data.

Abstract: A preprocessing method for configuring a near field communication (NFC) smart card, includes: determining a card set belonging to a user; generating identifier information corresponding to the card set according to a non-contact parameter corresponding to a card included in the card set, the identifier information identifying at least one of a state of conflict or a state of compatibility between two cards included in the card set; and sending the identifier information to electronic equipment used by the user, such that the electronic equipment adds, to an NFC smart card according to the identifier information, at least two cards compatible with each other in the card set.