Technologies for analyzing and deactivating an explosive device include electrically connecting an analysis device to a pair of trigger wires of the explosive device, performing a number of electrical measurements, and determining a deactivation action to be performed on the explosive device based on the electrical measurements (e.g., based on the calculated resistance between the trigger wires). In a disclosed embodiment, a primary lead of the analysis device is electrically coupled to a first trigger wire of the explosive device and a pair of secondary leads are each electrically coupled to a second trigger wire of the explosive device. The analysis device measures a voltage between the primary lead and at least one of the secondary leads. The analysis device also measures a current flowing through the secondary leads after a link of trigger wire extending between the leads has been cut or broken. The analysis device determines the deactivation action by determining a resistance of the analysis device based on the measured voltage and current. The deactivation action may include applying shunt to the trigger wires or cutting one or more trigger wires.

A detonator which, in response to a command, uses a first modulation process to generate a first signal and, in response to an event, uses a second modulation process to generate a second signal.

Exemplary methods and apparatus for testing an electrically fired item, e.g., a primer-only cartridge or all-up round (AUR) cartridge, in a variety of modes are provided. For example, a test system may provide a method of testing a primer-only cartridge and an apparatus to execute such method. Various parameters associated with operation of the electrically fired item, such as a primer or initiator, may be varied and measured using an embodiment including programmable selection of a pulse duration for firing control signals, a voltage of the firing control signals, and a number of pulses associated with the firing control signals. An inline resistance of the path of the control signals may also be adjusted. Test data including temperature, pressure, voltage, and/or current associated with operation of the electrically fired item may be measured during tests and displayed on a display device.

Exemplary methods and apparatus for testing an electrically fired item, e.g., a primer-only cartridge or all-up round (AUR) cartridge, in a variety of modes are provided. For example, a test system may provide a method of testing a primer-only cartridge and an apparatus to execute such method. Various parameters associated with operation of the electrically fired item, such as a primer or initiator, may be varied and measured using an embodiment including programmable selection of a pulse duration for firing control signals, a voltage of the firing control signals, and a number of pulses associated with the firing control signals. An inline resistance of the path of the control signals may also be adjusted. Test data including temperature, pressure, voltage, and/or current associated with operation of the electrically fired item may be measured during tests and displayed on a display device.

A system (10) for testing a laser proximity fuse (PF) (12) by simulating a closing velocity to a target along a line of sight (14) includes a static spiral surface (16) and a support arrangement (18) for supporting the proximity fuse (12) with the line of sight (14) directed towards an inside of static spiral surface (16). A folding mirror (20) is driven by a drive motor (22) so as to deflect the line of sight (14) towards progressively closer regions of static spiral surface, thereby simulating a closing velocity. The system can be miniaturized by employing converging optics (24). An alternative embodiment employs a shaped rotor (32) to achieve a similar effect.

A system (10) for testing a laser proximity fuse (PF) (12) by simulating a closing velocity to a target along a line of sight (14) includes a static spiral surface (16) and a support arrangement (18) for supporting the proximity fuse (12) with the line of sight (14) directed towards an inside of static spiral surface (16). A folding mirror (20) is driven by a drive motor (22) so as to deflect the line of sight (14) towards progressively closer regions of static spiral surface, thereby simulating a closing velocity. The system can be miniaturized by employing converging optics (24). An alternative embodiment employs a shaped rotor (32) to achieve a similar effect.

A method and apparatus for electrically detecting the presence of an initiator in a downhole tool.

A control module for a detonation sub includes a control circuit having a switch, a power supply input, a timer circuit, and a detonation signal output electrically connected to a detonator. A power supply is selectively connected in electrical communication to the power supply input. A timer circuit is initialized by activating the switch prior to connecting the power supply and deactivating the switch within an activation time. Once initialized, the timer circuit generates a detonation signal after a detonation time.

A control module for a detonation sub includes a control circuit having a switch, a power supply input, a timer circuit, and a detonation signal output electrically connected to a detonator. A power supply is selectively connected in electrical communication to the power supply input. A timer circuit is initialized by activating the switch prior to connecting the power supply and deactivating the switch within an activation time. Once initialized, the timer circuit generates a detonation signal after a detonation time.

A device and a method thereof for monitoring cloud-based electronic detonators are proposed. The device includes: a terminal location information transmission unit configured to collect location information of a terminal, and transmit the location information to a cloud service, an on-site information provision unit configured to download design information, and provide on-site information obtained by overlaying the downloaded design information and on-site images that are collected through a camera of the terminal by the worker, an electronic detonator information transmission unit configured to transmit input information of a plurality of electronic detonators to the cloud service when the worker inputs, through the terminal, the information of the plurality of electronic detonators collected on the basis of the provided on-site information, and an electronic detonator state transmission unit configured to collect state information of each electronic detonator, and transmit the state information to the cloud service.