The invention belongs to the technical field of experimental test, and particularly relates to a device for an impact experiment The technical scheme of the impact experiment device includes that an impact hammer component (1) comprises mutually sleeving impact hammers, the number of the impact hammers is as same as the impact number of times, a hook (3) connected with an upper pull wire (4) is mounted at the top of the impact hammer component (1), the impact hammer component (1) is lifted to a preset height by the upper pull wire (4), an impacted body is placed below the impact hammer component (1), an impact pad (5) is placed on the impacted body, and guide rods (2) are arranged on the periphery of the impacted body The impact experiment device can realize repeated impact at short time intervals, and the interval between two adjacent impact times, the size of impact force and duration of the impact force can be conveniently changed by changing height differences of the impact hammers, the height of fall, the quality of the impact hammers and materials of the impact pad

Impact experiment device

The invention discloses a horizontal drilling along-with-drilling signal array positioning and guiding method and belongs to the field of geotechnical engineering. The method includes the steps that 1, reconnaissance and surveying-mapping of lithologic characteristics and parameters of a horizontal drilling area are performed; 2, stress wave sensors are arranged; 3, a signal collecting base station is established; 4, signal collection is performed; 5, signal processing is performed; 6, the drilling position map of a drill bit is drawn; and 7, horizontal drilling real-time deviation correctionis performed. The method has the advantages that a good operation environment is created, the safety of operators is effectively guaranteed, unnecessary interferences are removed, and the operation accuracy is improved; the method can be taken in any one construction stage, the stress wave sensors are arranged in two modes, and thus horizontal drilling of various depths can be effectively monitored; and by monitoring the conditions of horizontal drilling in real-time, the drilling path can be adjusted in real-time, thus the construction time can be shortened, the situation that deviation correction is needed when too large drilling deviation occurs can be avoided, and the construction cost is greatly reduced.

Horizontal drilling along-with-drilling signal array positioning and guiding method

The invention discloses an acoustic wave resonance-based acoustic wave positioning system and method for a trenchless guide drill bit. The system comprises a routing module, a loudspeaking module, a receiving module and a positioning module, wherein the routing module is used for receiving an operation instruction and generating and broadcasting a synchronization instruction according to the operation instruction; the loudspeaking module is used for receiving the synchronization instruction and broadcasting an acoustic wave signal; the trenchless guide drill bit generates a resonance acousticwave signal after receiving the acoustic wave signal; the receiving module is used for receiving the synchronization instruction, acquiring the resonance acoustic wave signal from N positions on the earth surface and transmitting the resonance acoustic wave signal to the positioning module; and the positioning module is used for receiving the synchronization instruction and the resonance acousticwave signal and calculating the position of the trenchless guide drill bit through a multi-ball fixed point method according to the synchronization instruction, the acoustic intensity of the resonanceacoustic wave signal and the acquisition position of the resonance acoustic wave signal. The system provided by the invention does not need to additionally transform the drill bit, is simple in structure, quick in operation, light in instrument and low in cost and is suitable for all trenchless guide drill bits.

Acoustic wave resonance-based acoustic wave positioning system and method for trenchless guide drill bit

The invention discloses a drop-hammer releasing system and a drop-hammer releasing method The releasing system is applicable for a large-energy drop-hammer type impact test system and is specifically formed by a releasing tapered end A, a releasing tapered end B, a lock pin, a releaser housing, a magnetic force switch, a magnetic switch cover plate, a steel ball and other connection assemblies The releaser tapered ends are connected to the releaser housing through bolts, and can be lifted to a designed height through a lifting system A hammer body is connected to the releasing tapered end A through a thread, and positions of the lock pin and the steel ball can be changed through control of on and off of an electromagnet, and connection (locking) and disconnection (releasing) of the releasing tapered heads A and B can be achieved The drop-hammer releasing system is advantaged by high reliability, big carrying ability and high safety

Drop-hammer releasing system and drop-hammer releasing method

The invention discloses a time difference positioning system and a time difference positioning method for a deep well drill bit position and belongs to the technical field of signal positioning. The time difference positioning system for the deep well drill bit position comprises a signal sensor array, a signal processor and a computer, wherein the signal processor eliminates a noise jamming signal in a drilling operation environment to obtain a vibration signal of a drill bit according to a vibrating acoustic wave signal measured by the signal sensor array and performs analog/digital conversion on the vibration signal of the drill bit; and the computer determines the position of the drill bit by utilizing the time difference positioning method. According to the method, the range of acoustic wave vibration frequency is set and acquired, the interference factors of noise signals in the drilling operation site are eliminated, and three-dimensional positioning of the drill bit is realized; and moreover, the calculated amount is small, the gradient of the drill bit is monitored in real time, the position of the drill bit is adjusted in real time, and the engineering requirements of drilling operation are met.

Time difference positioning system and method for deep well drill bit position

Multi-drop-hammer millisecond delay loading experiment system

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Time difference positioning system and method for deep well drill bit position

Multi-drop-hammer millisecond delay loading experiment system