| Patent application number | Description | Published |
|---|
| 20080236432 | Enhanced method, device, and system for identifying an unknown or unmarked slave device such as in an electronic blasting system - For use in a system having a master device and slave devices (e.g., an electronic blasting system) and utilizing an automatic detection process that causes any slave devices that have not previously been identified to the master device to identify themselves to the master device, an enhancement to the detection process employs at least a second discriminator to detect superimposed responses from simultaneously responding slave devices, and a “deconvolution” algorithm in order to ascertain their identities. | 10-02-2008 |
| 20090283004 | CONSTANT-CURRENT, RAIL-VOLTAGE REGULATED CHARGING ELECTRONIC DETONATOR - A method of dynamically- and continuously-variable rate asynchronous data transfer, such as for use in an electronic blasting system, may employ a device that transmits data including synchronization bits and bits conveying other information, and a device that ascertains the rate of transmission of the synchronization bits and receives the bits conveying the other information at the ascertained rate of transmission. | 11-19-2009 |
| 20090283005 | METHOD FOR LOGGING A PLURALITY OF SLAVE DEVICES - A method for logging a plurality of slave devices is suggested, comprising the following steps: a) connecting a plurality of slave devices each having an identity and a pyrotechnic charge to an electrical conduit; b) after step a), connecting a logging device comprising a power supply, an electrical interface, and a memory and c)causing the logging device to communicate with each of the plurality of slave devices while the plurality of slave devices is simultaneously connected to the electrical conduit. | 11-19-2009 |
| 20090301332 | METHOD FOR DETECTING AN UNKNOWN OR UNMARKED SLAVE DEVICE SUCH AS IN AN ELECTRONIC BLASTING SYSTEM - A system, for example an electronic blasting system, in which a detection command is issued by a master device to all slave devices connected to the system, causing all slave devices that have not been identified to the master device to respond. | 12-10-2009 |
| 20090301333 | ELECTRONIC BLASTING SYSTEM HAVING A PRE-FIRE COUNTDOWN WITH MULTIPLE FIRE COMMANDS - A system and method for conducting a firing sequence including a master device and a plurality of electronic pyrotechnic devices, wherein the master device broadcasts, multiple times, a fire command to the plurality of electronic pyrotechnic devices, the electronic pyrotechnic devices commence a pre-fire countdown in response to each fire command received without error, and each electronic pyrotechnic device conducts a pre-fire countdown to expiration and thereupon commences a final fire countdown that concludes with firing. | 12-10-2009 |
| 20110002078 | Low-voltage-insensitive electro-pyrotechnic device - A low-voltage-insensitive electro-pyrotechnic device comprising electrical input terminals, a bridge element connected to the electrical input terminals, and a transient voltage suppressor connected between the bridge element and one of the electrical input terminals. The device may utilize one bidirectional TVS on one side of the bridge element or two unidirectional TVSs on opposite sides of the bridge element, and may also include one or more resistors and/or an RF filter between the input terminals and bridge element. | 01-06-2011 |
| 20130205888 | METHOD AND APPARATUS TO MEASURE BOREHOLE PRESSURE DURING BLASTING - Pressure sensors and techniques are presented in which one or more piezoelectric discs are housed in a holder structure with a hole allowing exposure of the piezoelectric disc(s) to ambient pressure within a borehole, with wiring leads passing through the holder structure for conveying an electrical signal from the piezoelectric device to an external interface circuit or for conveying an electrical signal from an internal interface circuit to an external data acquisition system. | 08-15-2013 |
| 20160108720 | METHOD AND APPARATUS TO MEASURE BOREHOLE PRESSURE DURING BLASTING - A method of calibrating a pressure sensing apparatus for measuring borehole pressure during blasting operations is provided. The method includes: striking a first piezoelectric sensor of a first unmolded pressure sensing apparatus; determining, with an interference circuit, a first peak voltage of the first piezoelectric sensor during the striking thereof; striking a second piezoelectric sensor of a second molded pressure sensing apparatus; determining with the interference circuit, a second peak voltage of the second piezoelectric sensor during the striking thereof; and calculating a piezoelectric constant of the first piezoelectric from at least the first and second peak voltages. | 04-21-2016 |
