A residual seismic-resistant performance evaluation system includes a seismograph including a seismic intensity sensor, a network interface, a storage, an A/D converter, a temporary storage means and a CPU; a data processing terminal for recording and processing measurement data; and a data processing server for evaluating residual seismic-resistant performance based on the measurement data. The system causes the data processing terminal to perform the steps below: a) calculating seismic intensity data based on the measurement data; b) setting a threshold value for the seismic intensity data; determining whether or not the seismic intensity data exceeds the threshold value; and d) transmitting the seismic intensity data exceeding the threshold value to the data processing server. The system causes the data processing server to perform steps below: g) requesting at least one of the seismograph and the data processing terminal to provide the measurement data; and h) receiving the measurement data transmitted according to the request.

A sensor system for a seismograph functions as a hybrid between a digital sensor and an analog sensor. The sensor system has an analog output combined with digital information about the sensor. The sensor system uses both an analog section and a digital section to provide information to a collection device. The digital section can provide digital information regarding the operation of the sensor(s) of the sensor system. After the digital section completes the exchange of digital information, the digital section can be deactivated and the analog section can be used to provide analog sensor information to the collection device. The collection device can use the digital information from the digital section to process the analog sensor information from the analog section.

Embodiments of the invention provide a barrier detection system that includes a plurality of sensors that are coupled in series to a seismograph. The seismograph receives a signal from the sensors. The system includes a computer system including computer storage and a processor. The computer system is in communication with the seismograph so that the computer system receives signals from seismograph and stores them in the computer storage. The system can include an object detection system that can process the signals received by the computer system from the seismograph. The object detection system can select a first portion of the signal to analyze based a predetermined time interval, create a baseline value for the first portion, and select a plurality of peaks from the first portion. The object detection can also analyze an amplitude, frequency, and periodicity of the first portion to assess the origin of the signal.

A seismograph includes: a crystal oscillator for generating a local clock signal; a data acquisition unit, coupled to the crystal oscillator and configured to acquire sampled data based on the local clock signal, and the data acquisition unit is further configured to acquire a fixed amount of sampled data within each period of the clock signal; a reference clock receiver for receiving a reference clock signal; and a controller, which is coupled to the data acquisition unit and the reference clock receiver and processes the sampled data. Also described are a method for managing sampled data of a seismograph, a controller, a non-transitory machine-readable storage medium, and a program product.