775results about "Ammunition fuzes" patented technology

An explosive downhole tool includes a housing having an upper housing part on one side of a window section and a lower housing part on an opposite side of the window section. An explosive charge is provided within the housing for cutting or expanding the wall of the tubular. The majority of outer surface of at least one of the upper and lower housing part in cross-section is rounded so as to be devoid of corners. The rounded surface eliminates the presence of sharp corners that may catch on restrictions or protrusions in a wellbore so that the downhole tool is more easily conveyable within a wellbore. Another explosive downhole tool includes fins extending from the housing. The fins have a height that decreases in a direction away from the housing. The shape of the fins enables the downhole tool to be more easily conveyable within the wellbore.

The invention provides a system and a method for detecting and preventing early explosion of an electronic detonator chip. The method comprises the following steps: S1, detecting a current charging voltage; s2, selecting a reference voltage, comparing the reference voltage with the current charging voltage, and obtaining a comparison result based on a comparator; and S3, taking an early explosion prevention measure according to a comparison result. According to the invention, the multi-gear reference circuit and the comparator are used, high-precision detection of voltage change of the energy storage capacitor is realized, and the digital control logic circuit is matched to detect that the voltage of the energy storage capacitor drops abnormally and rapidly, so that an early explosion symptom is identified; by arranging the bypass switch, the energy storage capacitor is short-circuited to the ground when an early explosion symptom is recognized, so that energy of the energy storage capacitor is not released through the ignition element, early explosion is prevented, and good practicability is achieved.

The invention discloses electronic detonator spot welding defect detection equipment which comprises a bottom bearing plate, a telescopic fixing structure is arranged at the upper end of the bottom bearing plate, a circulating feeding structure is arranged in the telescopic fixing structure, and a testing structure is arranged at the upper end of the telescopic fixing structure. The telescopic fixing structure comprises side supporting plates symmetrically and fixedly arranged on the top face of the bottom bearing plate. According to the electronic detonator spot welding defect detection equipment provided by the invention, the telescopic fixing structure is arranged, and two groups of transverse electric push rods which are symmetrically arranged drive clamping plates at the upper ends to get close to each other, so that electronic detonator control plates with different sizes on the surface of the top plate can be fixed; and meanwhile, a longitudinal electric push rod is matched to drive a test meter and a test needle head on the top to descend to be in contact with a welding spot on the surface of the control panel, so that whether the welding spot has pseudo soldering or not can be detected, compared with an existing detection device, the detection efficiency of the control panel can be effectively improved, and meanwhile higher adaptability is achieved for control panels of different sizes.

The invention discloses an electronic detonator detonation dynamic regulation and control method and system based on performance monitoring, and relates to the technical field of electronic detonators. The method comprises the following steps: acquiring environmental stress parameters and detonator performance parameters in real time, and performing time sequence analysis to realize dynamic feature extraction; identifying an abnormal fluctuation time period, analyzing and extracting fluctuation characteristics, and quantifying the interaction influence of the environment and performance parameters; a performance degradation model is constructed based on voltage / resistance time sequence data, the degradation rate is dynamically calculated in combination with batch characteristics and acceleration test data, and the detonation failure probability is simulated and predicted; a detonation parameter safety interval is generated through reliability level mapping, and optimization design of trigger parameters and energy is achieved through timing compensation, discreteness grouping, network topology optimization and energy dynamic adjustment strategies; a closed-loop dynamic regulation and control strategy is formed, and high-reliability detonation of the electronic detonator under complex working conditions is guaranteed. According to the method, multi-dimensional data analysis and an intelligent optimization algorithm are fused, and the safety of blasting engineering and the system stability are effectively improved.

The utility model discloses a detonating control device and a detonating control system for an underwater electronic detonator, and belongs to the technical field of detonating control of initiating explosive devices. The underwater electronic detonator detonation control device comprises a lower half shell, a first hollow cavity is formed in the lower half shell, the upper side of the first hollow cavity is open to form a first open end, and the outer wall of the peripheral side of the first open end is connected with a first annular protrusion; a second hollow cavity is formed in the upper half shell, the lower side of the second hollow cavity is open to form a second open end, the outer wall of the peripheral side of the second open end is connected with a second annular protrusion, and the second hollow cavity communicates with the first hollow cavity to form a mounting cavity; the detonation control unit is arranged in the mounting cavity, and the detonation control unit is used for being in communication connection with the electronic detonator; the sealing assembly is mounted between the annular bulge I and the annular bulge II; and the locking mechanism is connected between the lower half shell and the upper half shell. The detonation control device of the underwater electronic detonator is favorable for improving the reliability of underwater blasting.

The invention provides an electronic detonator delay calibration method, which comprises the following steps of: starting a first timer based on a high-speed clock, and setting a first calibration time threshold value; synchronously starting a second timer based on a low-speed clock in the chip, and setting a second calibration time threshold value which is greater than the first calibration time threshold value; when the first timer reaches a first calibration time threshold value, stopping the second timer and acquiring an actual count value of the second timer; calculating a theoretical count value corresponding to the first calibration time threshold value; generating a calibration factor based on the ratio of the actual count value to the theoretical count value; dynamically correcting the low-speed clock count value corresponding to the target delay time according to the calibration factor; configuring a second timer by adopting the corrected count value, and executing delay control; by means of high precision of the high-speed clock, the low-speed clock is calibrated before detonation, so that the low-speed clock is more accurate in the current environment, the standard that the delay error is smaller than 1% is achieved, and it is guaranteed that the detonation time of the electronic detonator is accurate and errorless.

A method of assembling a primer for a firearm cartridge including the steps of providing a primer cup including a cup base with a circular sidewall extending perpendicularly upward from a perimeter edge thereof, to a rim. Providing an anvil having an anvil base and pressing the anvil into the primer cup with the anvil base spaced apart from the cup base to form a primer gap therebetween. Providing a slurry including a primer composition and a carrier liquid and introducing a controlled volume of the slurry into the primer cup over the anvil. Drying the slurry in the primer cup to remove the liquid carrier and leave a deposit of the primer composition in the primer gap.

An accelerometer including: a housing; a proof mass; a piezoelectric material; a support member for holding the proof mass a predetermined distance from the piezoelectric material, the proof mass being rotatably disposed relative to the housing and having a center of gravity offset from an axis of rotation of the support member; a first biasing material for biasing the proof mass towards the piezoelectric material and against the support member; and a second biasing material for biasing the proof mass at the predetermined distance from the piezoelectric material. When a level of acceleration of the proof mass is less than or equal to an acceleration level that is to be measured, the second biasing material is configured to force the support member to rotate to disengage the proof-mass and the first biasing material to move the proof-mass to contact the piezoelectric material.

A projectile with a safe and arming device includes a tunable setback arming mechanism with an arming slider constrained and guided within a slider frame. The arming slider and slider frame cooperating to have a first safe position, a second intermediate position, and a third armed position. Components, such as the arming slider are manufactured by electronic discharge machining (EDM) to provide preforms on a work piece that can be further processed and ultimately assembled into tunable setback arming mechanisms. Various desired operating characteristics of the setback arming mechanism may be provided by adjusting and / or selecting specific parameters in the arming slider and readily adjusting same through machining and heat treating.

A downhole system for conveying an explosive tool within a wellbore and reducing damage to other tools of the downhole system. The downhole system comprises a downhole tool string configured for conveyance within a wellbore, wherein the downhole tool string comprises upper tools, a lower tool comprising an explosive charge, and a sub between the upper tools and the lower tool. The sub is configured to attenuate a shock wave caused by the explosive charge when detonated to thereby reduce damage to the upper tools caused by the shock wave. The sub comprises an axial bore and a plurality of radial bores extending between the axial bore and a space external to the sub.

A detonator includes a substrate, a controller mounted to the substrate, and a sensor coupled to the controller to measure a temperature, pressure, acceleration or other environmental parameter of the detonator. The controller is configured to transmit the measured environmental parameter from the detonator to a remote master controller, execute an action in response to a value of the measured environmental parameter, and / or prevent or modify at least one detonator function in response to the value of the measured environmental parameter.

A communications interconnect between the countermeasure controller of a countermeasure system and the dispenser containing the countermeasure payloads therein. Additionally, the present disclosure provides a power connection between the countermeasure controller and the countermeasure dispenser to deliver power to the countermeasure payloads, including smart payloads, utilizing existing vehicle wiring harnesses and wiring kits.

The invention relates to the technical field of electronic exploder control, in particular to an anti-electromagnetic interference dynamic threshold control system and method for an electronic exploder, and aims to solve the problem that the electronic exploder is easily interfered in a complex electromagnetic environment to cause false triggering or missing detection. According to the system and the method, surrounding electromagnetic signals are acquired, time domain, frequency domain, waveform distortion and interference source features are extracted and fused to generate clustering feature vectors, and the signals are divided into pure interference, pure detonation control and superposed signals by using an improved K-means algorithm; and based on the clustering result and the interference intensity, adjusting an identification threshold in real time through a staged dynamic threshold adjustment formula, introducing a multi-dimensional reference factor of historical interference data after the interference is weakened, and stably recovering the threshold to a normal level by adopting a staged adaptive recovery mechanism. According to the system and the method, the anti-interference capability of the electronic detonator in a complex electromagnetic environment can be remarkably improved, and the safety and the accuracy of detonation operation are ensured.

The invention discloses a special aluminum fixing capacitor for an electronic detonator with ultralow electric leakage characteristic and a preparation method thereof, the capacitor comprises a positive foil electrode, a negative foil electrode, an aluminum foil or an aluminum alloy foil coated with an oxide film on the surface, electrolytic paper and an electrolyte, and the electrolyte can be a phosphate-based electrolyte, a borate-based electrolyte or an organic electrolyte containing high-conductivity salt, and an additive, the preparation method comprises the following steps: slitting positive and negative foils and electrolytic paper, winding the positive and negative foils and the electrolytic paper to form a concentric circle, forming a repair oxide film, dipping a conductive polymer material, baking and polymerizing to form a conductive film, injecting a pouring sealant into an aluminum shell, and carrying out heat treatment to obtain the conductive aluminum shell. The formation liquid is ammonium dihydrogen phosphate, ammonium adipate or boric acid aqueous solution, and the pouring sealant is epoxy resin or polyurethane; the capacitor has an ultra-low electric leakage characteristic, is suitable for being used as a power supply energy storage element in an electronic detonator system, stabilizes power supply output and inhibits an electric leakage phenomenon.

The utility model relates to the technical field of electronic detonator processing equipment, and discloses a leg wire cutting device for electronic detonator processing, which comprises a workbench, a leg wire conveying mechanism, a leg wire cutting mechanism and a leg wire tightening mechanism, the leg wire conveying mechanism, the leg wire cutting mechanism and the leg wire tightening mechanism are respectively arranged on the workbench, and a leg wire is conveyed by the leg wire conveying mechanism and the leg wire tightening mechanism in sequence and is cut by the leg wire cutting mechanism under the condition that the leg wire is tightened by the leg wire tightening mechanism. Compared with the prior art, the leg wire cutting device has the advantages that the leg wire can be tightened in the conveying process through cooperation of the leg wire conveying mechanism and the leg wire tightening mechanism, so that when the leg wire cutting device is matched with the leg wire cutting mechanism for cutting, the situation that the cutting precision is affected due to deviation, distortion or bending of the leg wire is not prone to occurring, and the leg wire can be efficiently cut.

The invention discloses a low-vibration multi-point delay digital twin drive intelligent electronic detonator blasting control method, and relates to the technical field of blasting vibration control, and the method comprises the steps: 1, constructing a frequency weight curve and a weighted energy index, and unifying a time scale and three-component measurement; 2, establishing a virtual field by using a single-hole signature library, instrument transfer function deconvolution and a boundary correction propagation operator; step 3, performing delay optimization in combination with a timing characteristic function and a partition phase, and setting a keyhole read-only and weighted threshold; fourthly, programming backward reading is conducted, gating is conducted through a consistency index and an admission ratio, only one-time fine adjustment is conducted on the non-key hole on line according to an expected energy track and deviation statistics, and block assimilation updating is conducted later. According to the scheme, quantitative suppression of sensitive frequency band energy is achieved, and construction efficiency and traceability are kept. Through unified parameter and data object through identification, database building, optimization, execution and feedback, the scheme consistency is improved, the trial explosion frequency is reduced, supervision and acceptance are facilitated, and redisk tracing is supported.

The invention provides a management and control system and method for an intelligent seismic explosive column detonated by plasma, and belongs to the technical field of seismic explosive columns. The problem of low management and control efficiency in links such as production, storage, transportation, sales and warehouse-in and warehouse-out of the existing seismic explosive column is solved; the structure design that the plasma detonating body, the RFID passive chip and the seismic explosive column are integrated is adopted, plasma detonating is conducted on the seismic explosive column on the basis of the plasma shock wave detonation conversion mechanism, the instantaneity of explosion is achieved, and the safety of the seismic explosive column in the production and using process can be effectively improved while the requirement for refined exploration blasting can be met; meanwhile, through cooperation with information interaction of an information tagging device, a reader-writer and an information management and control system, management and control of the whole life cycle of the intelligent seismic explosive column in the use process of production, transportation, storage and blasting can be achieved; the method is applied to seismic exploration blasting operation scenes of oil and gas fields and coal gas fields.

A linear shaped charged Electro-Explosive (LSCe) Device includes an initiator in direct and intimate contact with an exposed portion of the LSC's main charge. In different configurations, the initiator's package, initiation charge or initiation circuit (acting over a gap) are in direct and intimate contact with the main charge. The LSCe device may be manufactured by connecting a packaged initiator to an opening in the LSC housing through which a portion of the main charge is exposed or by forming the initiator in situ in a receptacle coupled to the housing around the opening. The LSCe device can be used for such applications as thrust or mechanical termination of an airframe, cable cutting or initiation of a LSC.

A layered thermite composite includes alternating layers of metal oxide and reducing metal deposited upon a substrate. A fuzzy interface layer between each metal oxide layer and reducing metal layer includes reducing metal, reducing metal oxide, and metal oxide at least partially intermixed therein. The fuzzy interface layer forms while moving between chambers in a multi-chamber deposition process which minimizes exposure of the reducing metal to oxygen while moving between chambers. The fuzzy interface layer is not expected to grow in thickness after deposition. The combination of the relative thinness of the fuzzy interface layer as well as the presence of reactants as well as reducing metal oxide maintains the sensitivity of the layered thermite structure to mechanical ignition if the structure is used within a primer.

An apparatus, system, computer-readable medium, process, or combination thereof to seat a primer in a projectile casing. For example, a primer may be seated according to a depth indexed from a bottom of a projectile casing. A user, programmer, or control can seat, place, adjust, or otherwise determine a depth to seat a primer from a projectile casing bottom. A method to index a depth to seat a primer from a base of a projectile casing.

The invention provides a method and equipment for charging electronic detonators in groups. The method is applied to the technical field of civil blasting and comprises the following steps: arranging a plurality of electronic detonators according to a UID code sequence; connecting an exploder with the plurality of placed electronic detonators, and electrifying the electronic detonators by the exploder; after the electronic detonators receive the scanning instruction of the exploder, the electronic detonators are scanned in sequence; distributing delay time for each electronic detonator in the detonator network according to preset delay information in the exploder; if yes, after a charging instruction is received, the electronic detonators are divided according to the preset group number and the UID coding sequence, and the group numbers are gradually increased from near to far according to the distance between the group numbers and the exploder; sequentially starting the groups for charging according to the group numbers from large to small, setting a preset voltage when each group is started, and simultaneously charging with the started group; and when all the electronic detonators reach the detonation voltage, charging is stopped. The invention ensures that the preset voltage of the electronic detonator reaches a saturated state, and reduces the non-explosion rate.

An explosive downhole tool includes a housing having an upper housing part on one side of a window section and a lower housing part on an opposite side of the window section. An explosive charge is provided within the housing for at least one of cutting and expanding the wall of the tubular. The outer surface of at least one of the upper and lower housing part is rounded so as to be devoid of corners. The rounded surface eliminates the presence of sharp corners that may catch on restrictions or protrusions in a wellbore so that the downhole tool is more easily conveyable within a wellbore. Another explosive downhole tool includes fins extending from the housing. The fins have a height that decreases in a direction away from the housing. The shape of the fins enables the downhole tool to be more easily conveyable within the wellbore.

The invention provides a programmable electronic detonator safety communication system and a safety communication method, and relates to the technical field of electronic communication safety. The programmable electronic detonator safety communication system comprises a detonation controller and at least one electronic detonator, wherein the electronic detonator is internally provided with a secure communication module, and the secure communication module is configured to generate a unique physical identity label of the electronic detonator based on a physical unclonable function response value generated by the SRAM PUF unit; receiving an encryption instruction frame from the detonation controller for decryption and authentication; sending an encrypted response frame to a detonation controller; the detonation controller is configured to perform bidirectional identity authentication with each electronic detonator and negotiate or derive a session key; constructing a communication frame containing anti-replay parameters and instruction data, encrypting the communication frame by using the session key and generating a message authentication code; and verifying the integrity and freshness of the response frame of the electronic detonator. According to the method, the safety intensity can be ensured, and hardware guarantee is provided for maintaining millisecond-level instruction response.

The present invention discloses a method for testing the matching of an ignition element and an ignition agent of an electronic detonator, comprising the following steps: confirming whether to use a long-second or short-second quantity and then performing a dipping process; selecting a suitable ignition element according to the resistance; selecting a suitable ignition test box to perform an ignition sensitivity test, obtaining a minimum ignition voltage and a maximum non-ignition voltage, and determining an initial discharge voltage and a test step length; recording ignition and non-ignition situations; statistically analyzing the effective sample size; calculating a data validity judgment factor and a sample standard deviation, and determining a data validity judgment condition; calculating ignition voltages with different ignition probabilities; and performing an ignition reliability test. If ≥1 ignition fails, and if the failure is caused by the ignition agent mismatch, the ignition agent and the ignition element are rematched and retested. The present invention provides a basis for correctly selecting the ignition agent and the ignition element and achieving precise matching between the ignition agent and the ignition element, is conducive to improving the ignition rate of the detonator, and has a simple and efficient operation method.

The utility model discloses a waterproof electronic lightning pipeline clamp which comprises a box body and a cover body, first abutting surfaces are arranged on the two sides of the top of the box body, second abutting surfaces are arranged on the two sides of the bottom of the cover body, and when the cover body is in a closed state, the second abutting surfaces and the first abutting surfaces are matched, attached and sealed; a fixed seat is arranged in the box body, and two conductive wire clamps are connected in the fixed seat; an annular gap is formed between the fixing base and the inner circumferential wall of the box body, and a soft annular sealing body is connected into the annular gap. The cover body is connected with a crimping seat corresponding to the conductive wire clamp, and the cover body is internally connected with an annular convex wall which is arranged around the crimping seat and extends along the thickness direction of the cover body; and when the cover body and the box body are closed, the annular convex wall is embedded in the annular gap, and the bottom edge of the annular convex wall and the annular sealing body are sealed in a compression joint manner. The waterproof electronic lightning pipeline clamp is good in waterproof and dustproof performance, high in assembly efficiency and convenient to assemble and operate, and meets the waterproof technical requirements of deep water areas.

A casing for ammunition cartridges is made either partially or completely from polymer, and is used in connection with thermite primers. The use of a thermite primer permits simplified manufacturing methods for the casing. The use of a thermite propellant permits the use of a thicker casing wall while still allowing adequate space for a sufficient amount of propellant to achieve the desired results.

The invention discloses a production monitoring system and method applied to electronic detonator assembly, and relates to the technical field of electronic detonator assembly. The method comprises the steps of resistance value collection, capacitance value measurement, chip data verification and sealing performance and welding firmness detection. And the first ratio is calculated and compared with a preset evaluation value, and the single-point assembly condition is determined. And generating a parameter distribution curve by adopting a moving average method, and counting the number of alarm condition items to determine the assembly abnormality level. And calculating a second difference absolute value according to the acquisition period and the parameter variation, and determining a monitoring point position mark type. And dividing production line areas according to mark types, calculating an actual assembly evaluation value by adopting a weighted average method, comparing the actual assembly evaluation value with a preset standard, and judging the operation mode of the assembly equipment. According to the method, the electronic detonator assembly process can be comprehensively monitored, assembly abnormity can be found in time, and the production efficiency and the product quality are improved. By adjusting the operation mode of the equipment, the assembly process can be optimized, and the product is ensured to meet the standard.

The invention provides an implementation method for measuring the ignition resistance of an industrial electronic detonator, which belongs to the technical field of resistance measurement, and comprises the following steps: the measurement of the ignition resistance of the industrial electronic detonator is realized based on a detection circuit, the detection circuit comprises an MCU microcontroller U1, a single-pole double-throw physical relay U2, a relay change-over switch triode Q1, a divider resistor R1 and a divider resistor R2 of the measurement circuit, and a dual-path integrated operational amplifier. The test state of the ignition resistor is switched based on a single-pole double-throw physical relay U2 and a relay change-over switch triode Q1; a millivolt-level weak signal is output to a measuring circuit based on the MCU microcontroller U1, and specific voltage values of a point A and a point B corresponding to the divider resistor R1 and the divider resistor R2 in different test states are controlled; the specific voltage values of the point A and the point B are amplified by the same multiple based on the integrated operational amplifier of the two paths, so that the current value flowing through the measuring circuit is calculated, the ignition resistance value is calculated, and the measuring precision is effectively guaranteed.

The invention relates to the technical field of electronic detonator detonating, and particularly discloses an electronic detonator detonating agent automatic lifting method test device, which comprises an electronic detonator detonating agent ignition test platform, at least one ignition plate test row groove, an electronic detonator detonating agent ignition plate base plate, an electronic detonator detonating agent automatic lifting method test platform and an electronic detonator detonating agent automatic lifting method test platform, each row of electronic detonator detonating agent ignition plate substrates bear a plurality of ignition plates dipped with detonating agents; the anti-explosion electronic detonator test isolation cover is arranged above the electronic detonator detonating agent ignition test platform and is provided with a plurality of independent empty slots for independently placing the ignition plates; the dual-mode signal detection unit comprises an optocoupler signal sensor receiving device and a vibration signal sensor receiving device which are respectively used for detecting an explosion optical signal and a vibration wave signal; the device is suitable for meeting the batch test requirements of ignition capacitors, transduction elements and exploder agents of various electronic control modules, the test efficiency is effectively improved, and the test safety and reliability are guaranteed.

The utility model provides a blind insertion type electronic detonator. The blind insertion type electronic detonator comprises a communication connecting piece main body, a detonator main body and a detonator shell, the detonator main body is mounted in the detonator shell, and one end of the communication connecting piece main body is inserted into the detonator shell; an annular first conductive piece and an annular second conductive piece are fixed at one end of the communication connecting piece main body at intervals from inside to outside, and the first conductive piece and the second conductive piece are electrically connected with a communication line in the communication connecting piece main body; a conductive column and a conductive ring are fixed at one end of the detonator main body at intervals from inside to outside, and the conductive column and the conductive ring are electrically connected with a control module in the detonator main body; the conductive column and the conductive ring are respectively and tightly inserted into the first conductive piece and the second conductive piece and are contacted for conduction; the communication connecting piece body further comprises a soft rubber plug, at least one annular necking part is arranged at the opening end of the detonator shell, and the soft rubber plug and the necking part are clamped in a matched mode. According to the utility model, convenience can be brought to the plug-in connection of the communication connecting piece main body and the detonator main body.