Abstract: Ethernet systems, methods and blasting machines are presented for remote turn on of the blasting machine and reliable fire and arm commands issuance. Systems, methods, blasting machines and wireless bridge units are presented for wireless blasting for safe firing of detonators under control of a remote wireless master controller in which the blasting machine is connected by cabling to the wireless bridge unit and power to a firing circuit of the blasting machine is remotely controlled via the bridge unit. The bridge unit or Ethernet primary controller selectively provides first and second firing messages to the blasting machine contingent upon acknowledgment of safe receipt of the first firing message by the blasting machine, and the blasting machine fires the connected detonators only if the first and second firing messages are correctly received from the bridge unit.

Abstract: This sensor (10), capable of analyzing radar emissions RAD and communication emissions COM, includes: a reception stage (100), shared and capable of digitizing an incident signal; a primary analysis processing stage (200), shared and capable of preprocessing the digitized signal to determine a plurality of primary characteristics of the incident signal; and a secondary analysis processing stage (300), including a chain (400) for processing the preprocessed digitized signal dedicated to COM emissions and a chain (500) for processing the preprocessed digitized signal dedicated to RAD emissions, the primary analysis processing stage (200) including a discrimination module capable of applying the preprocessed digitized signal at the input of the chain (400) dedicated to COM emissions and/or of the chain (500) dedicated to RAD emissions, from primary characteristics determined for the incident signal.

Abstract: An agricultural enhancement method for removing or overcoming soil fragipan, hardpan, or other natural and/or artificial soil compaction barriers is disclosed. These barriers prevent root and/or water penetration, which inhibits agricultural development. Consequently, removing and overcoming these barriers is beneficial to the soil and to agricultural yields.

Abstract: Methods and apparatus to identify a type of acoustic event Mel Frequency Cepstral Coefficients (MFCCs). In one embodiment, received sound is processed using the MFCCs to locate a peak for comparison with a stored event to determine if the peak corresponds to the acoustic event.

Abstract: A sound source detection system for detecting a sound source (e.g., running sound of a vehicle) based on sound collected by microphones extracts characteristic amounts from the sound collected by the microphones, sets a plurality of classes according to the position of the sound source by a multi-class pattern recognition method (e.g., multi-class SVM) using the characteristic amounts, extracts characteristic amounts from sound collected by the microphones for detection of a sound source, determines a class to which the extracted characteristic amounts belong, from the preset plurality of classes, and estimates the sound source based on the class.

Abstract: A wireless power feeder 116 feeds power from a feeding coil L2 to a receiving coil L3 by wireless based on a magnetic field resonance phenomenon between the feeding coil L2 and receiving coil L3. A power transmission control circuit 200 supplies AC current at a drive frequency fo to the feeding coil L2. The feeding coil L2 outputs AC power in substantially a non-resonant state with respect to circuit elements on the power feeding side. Then, power is supplied to a receiving coil circuit 130 by a magnetic field resonance between the feeding coil L2 and receiving coil L3.

Abstract: A proximity fuzing arrangement for fuzing warheads carried by missiles which reduces the likelihood of the missile being detonated prematurely by such cases as rain or enemy counter measures. The fuzing arrangement includes at least two channels responsive to target signals in different frequency bands and also includes means for comparing the signals in these channels to distinguish between spurious signals such as enemy counter measures or rain and so called “true target signals”.

Abstract: Systems and methods are presented herein that provide for ignition of explosive devices through electric discharge. In one embodiment, an electrostatic discharge is directionally propagated through air to conduct electric current to the explosive device. The electric current may ignite the explosive device via heat, via triggering of ignition circuitry, via induced electric current conduction to the explosive material therein and/or via direct electric conduction to the explosive material therein. Alternatively or additionally, a system is configured with a vehicle to distally position the propagated energy to the explosive device such that damage caused by the explosive device is reduced.

Abstract: A sensor detection controller is used in combination with a capacitive sensor that is mounted on a seat of a vehicle in such a manner that a capacitance of the capacitive sensor changes according to whether the seat is occupied. The sensor detection controller has a fault detection mode and a normal detection mode. The sensor detection controller includes a signal source for applying an amplitude signal to the capacitive sensor, a switch for switching a signal path, through which the amplitude signal is applied, between the fault detection mode and the normal detection mode, a signal detector for detecting a change in a voltage or a current of the amplitude signal when the amplitude signal is applied, and an impedance member connected to the signal path.

Abstract: Embodiments of the present disclosure describe devices, methods, computer-readable media and system configurations for communicating and utilizing data received in radio frequency identification (“RFID”) signals to perform various actions. For example, a query signal may be transmitted to a plurality of RFID tags associated with a plurality of objects. A plurality of reply signals may be received from the plurality of RFID tags. Various actions may be performed based on one or more of the reply signals. In various embodiments, an RFID query device may include components such as a camera to capture image data and/or a global positioning system (“GPS”) component. Data from one or more of these components may be used in conjunction with received RFID data to perform various actions. RFID data may further be used to disarm and/or control weapons. Other embodiments may be described and/or claimed.

Abstract: The invention relates to a hand grenade (1) with an active body (3) containing an active charge (2), and with an ignition device (4) that acts on a detonator (12) to ignite the active charge (2). In order to achieve this feature, after the hand grenade (1) has been thrown the ignition can be triggered without delay if the tactical situation requires it, and no danger arises for the shooter if the hand grenade (1) with the safety device released is dropped accidentally. The invention pertains to an electronic ignition system composed of an ignition trigger (6) and a fuze (8) used as the ignition device (4), whereby the ignition trigger (6) remains with the shooter when the hand grenade (1) is thrown and the hand grenade (1) can be ignited by wireless only when the shooter activates an ignition trigger element (11) of the ignition trigger (6).

Abstract: A method and system of disabling a remote improvised explosive device (IED) that is triggered by a cell phone. A portable wideband network system, installed in a vehicle, is used to determine operator frequency or frequencies active on a route along which the vehicle will travel. The vehicle includes a wideband transmitter for raising a radio frequency noise floor across all of the active cellular frequencies in a limited area surrounding the portable wideband network system during passage along the route. A notch filter is used by the system for filtering a particular frequency from the noise floor. The power level of the portable wideband network system is increased so that the strongest signal at the particular frequency in the limited area is provided by the portable system's base station. All mobile terminals in the limited area around the vehicle are connected to the portable system and the portable system prevents call completion of any of the connected mobile terminals.

Abstract: A dynamic barrier system including a number of sensors that monitor a barrier area to determine specific types of objects approaching, within, or exiting the barrier area. Depending upon the type of object(s), the dynamic barrier system initiates an appropriate action, both lethal and non-lethal. The barrier system may advantageously deactivate after its intended period of operation eliminating difficult and/or dangerous removal.

Abstract: A plasma antenna generator includes an ionizable material, an explosive charge capable of projecting the ionizable material upon detonation, and a detonator coupled with the explosive charge. An electromagnetic pulse transmitting system includes an electromagnetic pulse generator and a plasma antenna generator capable of reradiating an electromagnetic pulse emitted from the electromagnetic pulse generator. A method includes providing an explosive device comprising an ionizable material, detonating the explosive device to propel the ionizable material, and ionizing the ionizable material to form at least one plasma trail. A sensing system includes an electromagnetic pulse generator, a plasma antenna generator capable of reradiating an electromagnetic pulse emitted from the electromagnetic pulse generator, and a sensing system capable of receiving and analyzing at least a portion of the electromagnetic pulse after being reflected from an interface.

Abstract: A stacked ordnance device provides a disposable and non reusable projectile weapon for passive area defense or denial. A stacked ordnance device has multiple projectiles and charges positioned sequentially in a barrel. A sensing module triggers a control module to enter a firing sequence. The firing sequence is the order and timing by which an electronic ignition system ignites firing charges and thereby shoots the projectiles. A mount positions the stacked ordnance device. The controller can also trigger a disabler that renders the stacked ordnance device unfit for subsequent use.

Abstract: A passive inductive switch for coupling a battery to a load in a remotely deployed battery-powered electronic device. The switch operates in response to a transmitted magnetic field at a particular frequency. The switch includes an antenna for transforming the magnetic field into an induced voltage and a voltage detector for sensing the induced voltage and triggering a switching element. The switch operates in a standby mode until a sufficient voltage is induced in the antenna which causes the switch to couple the battery to the load. In the standby mode the switch draws a negligible amount of power, which permits the device to be deployed in the field for long periods of time without expending significant battery power.

Abstract: The Mixed Mine Alternative (MMA) System is a military system designed for use in mechanized warfare. The MMA System has three components, MMA smart Antitank mines, MMA Antihandling Sensors linked to the MMA smart Antitank mines, and MMA Remote Control Units (RCU). The MMA smart Antitank (AT) mines contain a primary sensor system hardened against countermeasures and a kill mechanism similar to existing scatterable AT mines. The MMA AT mine is capable of transmit and receive communications with a Remote Control Unit and with the MMA Antihandling Sensors (AH). The communications capabilities and processors in the MMA AT and the MMA AH allow the system to establish MMA AT to MMA AH links after the mines have been scattered. MMA AT will be linked to MMA AH that are within their lethal radius. The MMA AT mine processors allow the mine primary antitank sensor to be on or off. The mine may receive and act on detonate instructions from the primary antitank sensor, from the antihandling sensors, or from the MMA RCU.

Abstract: A mortar fuse includes a fan wheel rotated in response to motion of the mortar fuse after the mortar has been launched. The fan wheel rotates a helix on which an activation wheel is mounted. The activation wheel moves in a path along the axis of the helix in response to rotation of the helix and eventually impacts against, and pierces, an acid container. Battery acid flows from the container and into battery cells, to energize the battery. The activation wheel includes a magnetic material. A coil is disposed along the path of travel of the activation wheel so that electric energy is generated in the coil as the magnetic activation wheel moves therepast. The electric energy operates a counter which controls a time function of the mortar fuse.

Abstract: The invention relates to a method for simulating the danger posed by mines or hand grenades to one or several participants in a military exercise. At least one weaponry simulator simulating a mine or a hand grenade and the sensor devices allocated to the individual participants are used and the effect of mines or hand grenades is simulated by transmitting data between the weaponry simulator and the sensor devices of the participants. According to the invention, data is transmitted through two-way radio communication between the weaponry simulator and the sensor devices of the individual participants. Radio transmission from the individual sensor devices of the participants to the weaponry simulator is carried out in the near field zone of the transmitting and receiving antennae involved.

Abstract: The invention relates to a random time delay fuze for an area denial submtion with anti-disturbance capability.

Abstract: A limpet and method for control thereof have a receiver section responsive o magneto-inductive signals in the ELF to VLF range that arm and fire a main charge. A swimmer places the limpet and enables it for control by remotely transmitted magneto-inductive signals in the ELF to VLF range. ELF to VLF frequencies provide safe and reliable communications from a remote control platform such as a land-based command station, an aircraft, surface craft, or submarine. The appropriately coded magneto-inductive signals in the ELF to VLF range are transmitted through the sea, air, beach, buildings, vegetation and sediment or any combination of these conditions to arm and fire or disarm the limpet as called for in the battle plan.

Abstract: An anti-tank trap (1) is constituted by a support (2), a military payload (3), an igniter (4) and a sight (5). The firing on the target is carried out at the time t.sub.d in a plane .DELTA.. The invention is characterized by the following chronological series of stages:first detection by FM/CW radar (lobes 11) and establishment of a first map ERA.sub.ref,second infra-red detection (IR) at t.sub.2 (plane V or V'),third IR detection at t.sub.1 (plane U or U'),computation of: t.sub.1 -t.sub.2 and of the angular velocity d.gamma./dt of the target,fourth detection by FM/CW radar (ERA.sub.m),measurement of the range d.sub.c and of the size of the target (ERA.sub.m -ERA.sub.ref),analysis of the target, firing decision, computation of t.sub.d and triggering at t.sub.d of the military payload.Application to an anti-tank trap.

Abstract: The non-lethal TASER.RTM. Area Denial Device (TADD) can be deployed to prevent enemy reconnaissance troops or small raiding parties from penetrating lines and for their capture. The inventive device comprises a non-lethal alternative to the anti-personnel landmine. The TASER.RTM. alternative uses electronic stun capability in combination with a landmine housing and deployment system. This invention comprises improvements which address the issue of deployment. Regardless of which of the two flat sides of the device is in the up position, it provides the ability to launch the proper set of wires at an upward angle to intercept the subject when the target subject is in the correct position. It also simultaneously establishes a ground wire connection and prevents the second (downward facing) unusable set of wires from loading or short circuiting. The possibility of the device landing on the radius edge is eliminated by shaping the housing to make it unstable on that plane.

Abstract: A non-lethal alternative to the anti-personnel landmine. The TASER.RTM. alternative uses electronic stun capability in combination with a landmine housing and deployment system. The device can cover a radius of 15 feet (30 feet possible) and can be triggered by various sensors. Although the TASER.RTM. non-lethal area denial device would cause no deaths or injuries if accidentally triggered by friendly forces, it can also be permanently disabled when no longer needed, by remotely using a secure code to shut down the TASER.RTM. system. When triggered, the device launches darts in multiple directions at 10 or 20 degree intervals in a direction generally facing the enemy. The darts temporarily incapacitate any persons within an inch of the darts by causing uncontrollable spasms of the near surface motor control muscles causing temporary loss of the subject's motor control functions. The subject will fall and temporarily be completely incapacitated.

Abstract: A system for guiding the end phase of guided autonomous missiles consists of a marker unit having a sensor, a signature transmitter and a device for attachment to the target, as well as a cooperating direction finder in the guided missile.

Abstract: Metal structures that are resonant to electromagnetic waves are combined h land mines to make them easier to detect using Ground Penetrating Radar. Knowledge of the resonant characteristics in the metal structures enhances detection and identification.

Abstract: The spinning mine has all of its projectiles concentrated in one small ar It is launched from a spring-loaded threaded screw launcher and acquires angular momentum as it ascends into the air from the launcher to a pre-determined detonation altitude. As the mine spins, the detector assembly on board detects the presence and location of potential targets and sends appropriate indicative signals to a microprocessor, also on board. The microprocessor determines therefrom the location of the largest target or the largest cluster of targets in the environment and triggers the detonation of the mine such that the projectiles are jettisoned in a conical pattern toward the largest target or the largest cluster of targets for a more efficient destruction of the targets.

Abstract: A device for locating artillery and sniper fire with a sensor and acoustically triggered marking means. An igniter is provided with the acoustic sensor and is adjustable in terms of frequency and/or pulse pattern. A remover preventer is provided and the components are provided in a shell-proof housing whereby removal triggers the marking means.

Abstract: A zone-defense weapon system includes an attack device having at least one main launch tube having a projectile that encloses an explosive charge. At least one device for surveillance and acquisition of targets controls a surveillance zone by detecting an objective target penetrating into the surveillance zone, and by controlling firing of the main projectile in the direction of the detected objective target. The attack device is located at a remote distance from the surveillance and target-acquisition device, and the surveillance zone is within the action radius of the attack device. The surveillance device may include an auxiliary projectile fired from the attack device.

Abstract: A sensor arrangement for an active member, especially such as a landmine which is deployed against ground and airborne target objects, including a waking or proximity sensor which is responsive to the approach of a target object. A high degree in the precision of direction-finding, in addition to target classification; can be achieved by means of a larger passive bearing or direction-finding base, such as can be set up through the positioning of at least three microphones about the mine or at a certain distance from the mine. Hereby, such a passive acoustic direction-finding or bearing base evidences the advantage in contrast with essentially the active high-frequency direction-finding, in that the mine cannot be located from the target object and thus is able to remain in constant operation upon the activation of a waking or proximity sensor without any danger of the mine having its presence betrayed.

Abstract: An active electromagnetic influence firing system has transmitter coils and eceiver coils mounted on a single warhead section. One set of receiver coils has vertical look capability for detecting surface ships and another set has 360.degree. look capability for detecting submarines. An influence electronics package automatically nulls out directly induced electromagnetic radiation and passes only the signature received from targets. Amplitude, duration, and frequency criteria implemented by circuitry in the influence electronics package determine whether there is a valid target.

Abstract: A programmable munitions device (10) includes a transponder unit (12), a digital interface (18), and munitions unit (20). The transponder unit (12) receives a radio frequency signal from an interrogation unit (22). The transponder unit (12) decodes the radio frequency signal to obtain the digital data representing the transmitted information from the interrogation unit (22). The information is stored within a memory (14) and initiates the start of a time period within a timing unit (16). Upon activation, the munitions unit (20) reads the information within the memory (14) and a timing flag within the timing unit (16) through the digital interface (18). If the timing flag is set, indicating that the information within memory (14) is still fresh, munitions unit (20) causes the detonation of explosive material if the recognized event corresponds to the triggering event programmed within the memory (14).

Abstract: A fuze or igniter provided with an adjustable electronic unit (24), a separate energy supply (40) as well as a mechanical safety device (26). In order for this fuze to be independent of the weapons system and not be bound to a particular type of payload, the adjustable electronic unit (24) and the mechanical safety device (26) are accommodated in the essentially cylindrical, watertight housing (22) of a basic module (20) that has two end faces (28, 30). The energy supply (40) can be mechanically and electrically connected with the basic module (20). In the region of one of its end faces (28), the basic module (20) can be connected with either a programming device (136) in order to program in an ignition time and a sterilization time (desensitization time) or a payload (42) that is independent of the weapons system employed and is not ammunition specific.

Abstract: A method for activating a mine possessing a specified activation radius; in particular an anti-helicopter mine, which is brought into an alarm condition by acoustic signals. In the alarm condition of the mine, an NLOS-radar is activated, through which the target speed and the target range of a helicopter are detected and the result of the detection is compared with the specified activation radius of the mine. Full activation of the mine is then implemented when the detection result is smaller than the activation radius, or a further or renewed NLOS-radar detection is effected when the detection result is greater than the activation radius of the mine.

Abstract: A method for a minefield simulation includes a number of troops and vehicles each including a player detection device or vehicle detection device respectively. The player detection devices and vehicle detection devices determine and transmit their respective locations to a central computer. The central computer or player determines whether the player is within an activation radius of a mine in the minefield. The central computer or player has established a bit map of the minefield with indications of the exact placement of the mines within the minefield. If a player (troop or vehicle) is within the activation radius of a mine, the central computer or player records the identity of the expended mine in the minefield bit map by changing its indication from active to inactive. Either central computer or the player detection device may determine the effects of the expended mine upon the troop or vehicle.

Abstract: An area defense mine has an orientable launch tube to fire a projectile at any bearing angle. The projectile contains at least one explosive charge, an arrangement for spinning the projectile about an axis of rotation and a device for detecting a target. The launch tube is orientable according to at least two different angles of sight. An arrangement for positioning the projectile in the launch tube allows the projectile to be positioned on a sabot of the tube in such fashion that the axis of rotation of the projectile remains oriented at a given axis whatever the angle of sight selected. Such a mine can be used either in a short-range or in a medium-range operating mode.

Abstract: This invention provides a fuze which includes metering means for deriving a firing signal from the frequency-time characteristic of electrical analogue signals derived from the vibrations emanating from a moving vehicle. The firing signal may be derived by integrating or differentiating the characteristic or by measuring the instantaneous frequency of the analogue signals.

Abstract: A sensor arrangement for the activation or starting of an active body, especially for a land mine which is deployed against ground and airborne targets. The arrangement includes a waking sensor which is responsive to the approach of a target, and incorporating circuit arrangements for the environmentally-adaptive setting of sensor-evaluating circuits in order to release the operating mechanism employed for combatting the target. Provided is at least one antenna for the radiating of a nondirectional electromagnetic ground or direct wave (which hugs the terrain), and possibly also for the receipt of reflections from the surroundings after the deployment of the active body, as well as after activation by the waking sensor, also for determining the relative movement of a target which has penetrated into the previously encompassed surroundings, due to the reflections thereon.

Abstract: In a mine capable of righting itself, laying devices for sensor lines are attached on the outside to the topside of a mine housing. During storage and during transport, the laying devices are, in their initial position, in close contact with the topside of the mine housing. Upon distribution of the mines over the terrain, the laying devices are spread away from the topside of the mine housing and transferred into their effective position so that the sensor lines can be ejected at an angle of about 45.degree. inclined with respect to the vertical.

Abstract: A process for controlling the detonation of a mine for the combating of vehicles, in particular armored vehicles such as tanks, with an electronically-triggered detonating arrangement and, a mine including a triggering device which is actuated pursuant to the inventive process. The detonating arrangement is only triggered when a receiver which is connected ahead thereof has determined requisite, preset aggregate vehicular criteria in a vehicle approaching the mine. The receiver is provided with a pattern comparator which is supplied from a pattern storage in accordance with a pregiven vehicular type criterium and with a detector receiving signal from the currently detected vehicle.

Abstract: A device for detecting an object such as a tank in a target area and for causing a horizontal mine to be fired at the object, comprises first and second microphones which detect noise, including noise from a tank, in the target area, in infrared sensor having a directional characteristic which is narrow with respect to the target area and which extends towards the center of the target area to define a target window, and an electronic evaluation unit. The electronic evaluation unit receives acoustic signals from the microphones and calculates a correlation function from the acoustic signal. If a property derived from the calculated correlation function, for example, the correlation or the correlation gradient, exceeds a predetermined threshold, the firing mechanism of the horizontal mine is enabled. If the infrared sensor also detects the presence of an object within its target window, the electronic evaluation unit will cause the horizontal mine to be fired.

Abstract: A helicopter combat device for detecting flying objects and for causing a ground-to-air mine to be fired at them, comprises a microphone which is sensitive to noise generated by a helicopter, an infrared sensor having a directional characteristic which is within the firing cone of the ground-to-air mine, and an electronic evaluation unit which receives and processes electrical signals generated by the microphone and the infrared sensor. The electronic evaluation unit separates the electrical signals received from the microphone into a first band corresponding to noise having a frequency in the range of 5-40 Hz (typical of a rotating rotor of a helicopter), and a second band corresponding to noise having a frequency in the range of 200-1000 Hz (typical of the machine noise of a helicopter).

Abstract: A mine, particularly an anti-tank mine, including a warhead which is arranged in a launching installation, and the latter of which is equipped with an aiming device. The mine is equipped with a range-finding device for the determination of the direction and for the measurement of the at least approximately horizontal distance between the mine which is in a lurking position and the target which is to be attacked, especially such as a tank or armored vehicle, and wherein the range-finding device is operatively connected with the aiming device for the setting of a specified launch angle or elevation for the launching installation for the warhead.

Abstract: An arrangement for programming the control of a mine including a pin (16) made of a material having a predeterminable magnetic permeability and inserted into a blind bore-like opening in a mine housing (12). Via a coil disposed in the interior of the mine and surroundng the blind bore-like opening, a resonant output frequency f.sub.R) of an oscillator, which frequency is a function of the permeability of the pin (16), is generated. If the detected resonant output frequency (f.sub.R) corresponds to a frequency (f.sub.i) stored in a frequency/address memory (42), an address (A.sub.i) associated with this frequency (f.sub.i) is read out and fed to a read-only memory (44). This determined address (A.sub.i) causes information (I.sub.i) associated with this address (A.sub.i) in the information memory (44) to be read out so that the action belonging to the respective information (I.sub.i) is initiated within the mine.

Abstract: A system for powering and communicating with a mine or mine simulator, involving magnetic induction coupling between a powered search unit with a resonating primary inductance coil and a secondary inductance loop in the mine device. The current in the secondary loop is rectified in the mine device to provide dc power. The magnetic induction frequency can be in the range from 40 kHz to 1 MHz. The search unit can resonate sequentially or simultaneously at different frequencies, and rectification of the different frequencies in the mine device can provide information to the mine device. Feedback to the search unit can be by the mine device modulating the impedance of its secondary loop, for instance at an audio frequency 1/10th of the frequency of the induction coupling, and by detecting in the search unit the corresponding change in the reflected impedance. A mine device can be armed or disarmed, and report on its status when queried by the search unit coming sufficiently close to the mine device.

Abstract: A sensor system for a weapon, the sensor system comprising at least two light detectors having different fields of view and control means responsive to signals from the light detectors to calculate an appropriate time delay to firing of the weapon and to cause activation of the weapon firing system accordingly.

Abstract: This portable munition system has multiple modes of operation with the sensor inputs, output actuator circuits, and timing requirements determined by the control electronics. A self-check is performed initially before the munition can be armed. An indicator light driven by the electronics circuitry provides status information to the operator. The warhead can be aimed with integral sights.

Abstract: A proximity detector mine system comprises a mine depolyable on the ground and including a propellant device effective upon actuation to propel the mine above the ground, explosive material, a detonator for detonating the explosive material a predetermined time after the propellant has been actuated, a sound sensor producing electrical signals in response to the sound sensed thereby, and a processor for processing the electrical signals and for actuating the propellant device in response to the electrical signals received from the sound sensor.

Abstract: By replacing a round sensor wire capable of effecting, by the formation of a spiral spring, the righting of a sensor wire on a mine after laying by a wire having a rectangular cross section wherein the larger sides of the rectangle of the cross-sectional area of the sensor wire form essentially a right angle with a radius vector of the cylindrical supporting member, the righting force of the sensor wire is considerably enhanced as compared with a round wire although the wire still remains sufficiently elastic to be windable around the mine without permanent deformation.

Abstract: The invention is a high power microwave hardened mine wherein a detonation harge and its appropriate detonation circuitry are disposed within a housing that is impervious to high power microwave energy. A power source and a sensor that provides the detonation signal are connected to the detonation circuitry via two sets of input and output piezoelectric transducers which convert an electrical signal to an acoustic one, the input, and then convert the acoustic signal back to an electrical signal, the output. By providing for d.c. to r.f. and r.f. to d.c. converters, the power source can be placed externally to the metal package and therefore, the battery can be easily and safely replaced.