150 results about "Structural testing" patented technology

The invention provides an anchor rod (cable) supporting structure test and anchoring system performance integration test device and method and relates to the anchoring test technology field. The device comprises a frame, a loading mechanism, a test mechanism and a test piece. The frame comprises a pedestal and an operation bench. The loading mechanism includes a loading frame, a chuck, a surrounding rock stress loading oil cylinder, and a drawing hollow oil cylinder. The test mechanism includes monitoring mechanisms of a load, displacement, acoustic emission and the like. The test piece includes a rock test piece, an anchor rod (cable), an anchor net and the like. The loading mechanism and the drawing hollow oil cylinder are arranged above the pedestal, and a torsion motor and an anchor rod drilling machine are arranged on the operation bench. The rock test piece is placed between bearing plates, and one end of the anchor rod (cable) is fixed or anchored in the rock test piece through the chuck, and the other end passes through the drawing hollow oil cylinder. The device can test mechanical performance of the anchor rod (cable) and an anchoring component, can realize stress environment simulation of ''five-sided loading and one side empty'', and can carry out surrounding rock drilling response or anchoring system performance integration testing.

A system for enhancing the practicability of at-speed structural testing (ASST). In one embodiment, the system includes first means for performing statistical timing analysis on a design of logic circuitry. A second means performs a criticality analysis on the logic circuitry as a function of the statistical timing analysis so as to determine a criticality probability for each node of the logic circuitry. A third means selects nodes of the logic circuitry as a function of the criticality analysis. A fourth means selects timing paths as a function of the criticality probabilities of the selected nodes. A fifth means generates an ASST pattern for each of the selected timing paths. A sixth mean is provided to perform ASST on a fabricated instantiation of the design at functional speed using the generated ASST pattern.

A Test Access Mechanism (TAM) architecture for facilitating testing of IP blocks integrated on a System on a Chip (SoC). The TAM architecture includes a Test Controller and one or more Test Wrappers that are integrated on the SoC proximate to IP blocks. Test data and commands corresponding to input from an external tester are packaged by the Test Controller and sent to the Test Wrappers via an interconnect fabric. The Test Wrappers employ interface with one or more test ports to provide test data, control, and/or stimulus signals to the IP block to facilitate circuit-level testing of the IP block. Test results for the circuit-level tests are returned to the Test Controller via the fabric. Test Wrappers may be configured to pass through interconnect signals, enabling functional testing of IP blocks to be facilitated via test packages and test results transmitted between the Test Controller and the IP blocks via the fabric. The TAM may be implemented in a fabric-to-fabric bridge, enabling testing of IP blocks connected to fabrics on both sides of the bridge.

A system for detecting the onset of structural failure in a structural element subject to a mechanical load comprises a metering array, a signal processor, and an output processor. The metering array measures physical quantities associated with the structural element. The signal processor transforms the measured physical quantities into a series of sample mode spectra, and the output processor generates output as a function of the series of sample mode spectra. Methods are also disclosed for detecting the onset of failure in a structural element subject to a mechanical load, for structural testing, and for structural health monitoring.

The invention relates to a two-dimensional internal structure detection system of an asphalt mixture and a detection method. The system comprises a document management module, an image preprocessing module, an aggregate grading screening identification module, and an internal structure characteristic index calculation module, wherein the document management module, the image preprocessing module,the aggregate grading screening identification module, and the internal structure characteristic index calculation module are connected in sequence. The system has the advantages of high test accuracy, simple operation and low cost, overcoming defects of a traditional mixture internal structure test method describing overall characteristic of the internal structure through a single evaluation index. The system and method reflect distribution of internal components of the asphalt mixture in specific aspects, and evaluate overall characteristic and distribution characteristic of internal structure of the asphalt mixture accurately and objectively, thereby being low-cost, easy-to-promote novel test and evaluation system and method.

A static loading device is placed on the microscope, a signal-collecting device is placed at the place of microscope oculr, said signal-collecting device is connected with image-collecting card, microprocessor and display in turn by means of conductive wire, said microprocessor is respectively connected with power supply and static loading device by means of conducting wire, its light source device is connected with power supply by means of conducting wire. Its control method includes the following steps: 1. starting; 2. regulating position of test piece, primary loading and applying light source; 3. collecting measuring signal, inputting said signal into image-collecting card and making A/D conversion and storage; and 4. calculating and processing measured data signal inputted by image collecting card by using microprocessor and making signal judgement.

Disclosed herein are methods and systems for generating test vectors for use in verification of a circuit design and for hardware testing on a fabricated circuit representative of the circuit design. The system and methods can systematically and automatically perform functional and structural testing on selected paths of the circuit design and, in turn, generate one or more test vectors to increase PDT test coverage using the results of the structural test on the selected path.

The invention relates to a sediment oxygen demand (SOD) determination device based on electromagnetic dynamic, and a using method. The SOD determination device comprises a testing room, a dynamic room, a magnetic rotor, a magnetic pole, a motor, a dissolved oxygen probe socket, support fixing interfaces and a storage battery, wherein the testing room is in a cylinder structure with the bottom end opened and the runway-shaped cross section; the dissolved oxygen probe socket is formed on one side of the top of the testing room; the support fixing interfaces are arranged at the two ends of the top of the testing room respectively; the dynamic room is a cylindrical barrel and reversely fixed at the top of the testing room; the motor connected with the magnetic pole is arranged in the dynamic room, and is externally connected with the storage battery by a connecting line; the magnetic rotor is placed in the testing room, and is in magnetic connection with the magnetic pole; a hand-held support is connected and fixed to allow the device to be submerged in water and to be filled with overlying water; the dissolved oxygen probe is inserted and sealed; the device is then fixed at the bottom of the water; overlying water circulation of the testing room is adjusted and controlled; and an SOD is determined. The device is simple in structure, easy to dismount, small and exquisite in size, and convenient to carry, and can effectively determine the SOD under the action of different hydrodynamic forces.

The invention belongs to the technical field of vibration testing, and particularly relates to a modal testing device and a modal testing method for a flexible structure. The modal testing device comprises a vibration exciter, a connecting rod fixed to a top end of a vibration exciter output shaft in a vertical direction, a force sensor connected to the top end of the connecting rod through a ballhead hinge device and used for measuring an exciting force, a flexible plate-shaped test piece, and an acceleration sensor, wherein one end of the flexible plate-shaped test piece is fixed at a fixedpoint in a test area, and the bottom surface of the other end of the flexible plate-shaped test piece abuts against the top of the force sensor; and the acceleration sensor is arranged on the test piece and is used for testing a response signal. According to the modal testing device and the modal testing method for the flexible structure, by combining the ball head hinge device and the force sensor, an influence of axial rigidity and bending rigidity of the connecting rod on the structure test result is eliminated, and the influence of a vertical axial force on the structure is relatively small so that the influence of the vibration exciter connecting rod and the vibration exciter can be basically eliminated, and the precision of the test result, especially the test result of the flexiblestructure, is improved.

The present invention discloses a product quality testing method and device. The method comprises: obtaining the quality testing requirement of a target product, wherein the quality testing requirement comprises the testing process and the quality standard of the target product; based on a pre-defined quality testing data model, converting the quality testing requirement to structural testing data; and according to the structural testing data, performing quality testing of the target product. The technical problems are solved that the quality planning of the current manufacturing industry generally employs a quality testing file to perform description of the testing process and the quality requirement and needs artificial participation to cause to low product quality testing efficiency.

The invention relates to a combined structural test loading device and belongs to the field of structural test technologies. The combined structural test loading device comprises a foundation 1, four racks 2, a lower cross beam 3, a loading oil cylinder 4, an upper cross beam 5, an upper frame 6, a lock bolt 7, a secondary cross beam 9, an actuator 10, a base 11 and a hydraulic floating supporting platform 12, wherein the four racks 2 are mounted at the upper part of the foundation 1 and are integrally connected through the upper frame 6 at the upper end; the upper cross beam 5, the loading oil cylinder 4 and the lower cross beam 3 are mounted at the lower part of the upper frame 6; the secondary cross beam 9 is mounted below the lower cross beam 3 and is connected with the base 11 through the actuator 10; a test piece placement position for placing a clamping test piece 8 is arranged between the secondary cross beam 9 and the base 11; the loading oil cylinder 4 and the actuator 10 jointly apply load on the clamp test piece 8. According to the invention, a secondary loading device is additionally arranged on the existing large-scale structural testing machine, an original structural testing machine can be transformed according to the actual demand, and the secondary loading device can be used independently.

The invention provides a quick mounting method of a velocity/acceleration sensor, used for structural testing of bridges, buildings and the like. The method can guarantee rapid mounting at the top and bottom, and on side surfaces of a structure, can rapidly conduct dismounting and cleaning, and is effective on various surfaces, such as the surfaces of novel concrete structures, old concrete structures, steel structures and wood structures, as well as the common paving structures. According to the actual condition of a mounting site, the method is suitable for short-term or long-term tests, is further suitable for sticking at complex positions (horizontal sticking, lateral sticking and upward sticking), avoids temporary fixing, can realize instant adhesion after pasting, and can realize the fact that the strength is reached a moment later; quick sticking powders with different setting times and different water-cement ratios added during mixing are selected, so as to control the viscosity and setting times, and the requirements of quick sticking, large-scale sticking, sticking at special positions and the like are satisfied; the mounted sensor has the advantages of being wide in application occasions, wide in frequency response ranges, wide in application temperature ranges, high in supporting weight, convenient to dismount and clean up and the like.

In one process, a mechanical stress (quasi-static or dynamic) or thermal stress is introduced into a local area of a structure where damage is suspected. A standard (or high speed for some dynamic stress approaches) video recording is made of the area under test. The video is processed using a motion amplification algorithm which magnifies extremely small motions. The motion amplification can reveal strains (for static or thermal loading) or wave patterns (for dynamic loading) generated on the surface of the part. If there is damage or structural change, the resulting surface strains will indicate it, or the surface waves in that area will change in phase, amplitude, or both, and will be indicated in the video images. In another process, motion magnification is used to highlight local failure events during structural testing.

The invention discloses an electromigration testing structure, which comprises a metal testing structure and a metal connection structure, wherein the metal testing structure is provided with a head end and a tail end and comprises at least two metal testing lines; the metal connecting structure is electrically connected with the head end and the tail end of the metal testing structure to enable the metal testing lines in the metal testing structure to be connected in parallel; the metal connection structure is also provided with loading current nodes and measurement voltage nodes, wherein theloading current nodes are used for applying the current of the first testing metal line and the second testing metal line; and the measurement voltage nodes are used for measuring voltage after the first testing metal line and the second testing metal line are connected in parallel. By use of the structure, accuracy for a testing system to judge the time to failure of each testing sample can be improved, and the recommendation accuracy of testing lifetime can be improved. The invention also discloses a testing method for the electromigration testing structure.

The invention discloses an internal climbing type construction tower crane natural vibration frequency monitoring device and a monitoring method thereof. The device comprises ICP acceleration sensors, a data line, an IMC data collection instrument and real-time monitoring software. The ICP acceleration sensors are connected with the IMC data collection instrument through the data line, the IMC data collection instrument is provided with the real-time monitoring software, and the ICP acceleration sensors are distributed on an internal climbing type construction tower crane. The ICP acceleration sensors are structural test type acceleration sensors and are small in size and mass; for the tower crane of a high-rise structure, measuring point distribution is high, mounting is convenient, and therefore the sensors are selected conveniently. Site monitoring of the tower crane is more accurate, the defect that the frequency of the tower crane cannot be monitored on site at present is overcome, and in addition, actual measuring data obtained through the above device are provided; through the treatment method, the low-order frequency of the tower crane can be obtained, and the basis is provided for subsequent power characteristic analysis of the tower crane.

An integrated circuit (IC) comprises a plurality of analog stages (10a-c), each of the analog stages being conductively coupled to a power supply (20; 20a-c), and being conductively coupled to each other by a signal path (12); and a test arrangement for testing the plurality of analog stages, the test arrangement comprising input means such as an analog bus (40) coupled to a signal path input of each analog stage from the plurality of analog stages, output means such as a further analog bus (50) for communicating a test result to an output of the integrated circuit, switching means such as a plurality of switches (36) in the biasing infrastructure of the IC for selectively disabling an analog stage, and control means such a shift register (60) for controlling the switching means. Consequently, the analog stages of the IC can be tested and debugged in isolation without the need for switches in the signal path through the cores. A current sensor (70) may be present in the power supply to facilitate structural testing of the analog stages in isolation.

The invention discloses a static structural testing data collection system based on Zigbee wireless communication. The Zigbee wireless network of the collection system adopts a star-shaped structure, and the data collection system includes a plurality of data collection terminal nodes, a coordinator node and a computer, wherein the data of strain, displacement and load, all collected by the data collection terminal nodes, are transmitted to the coordinator node in a wireless transmission mode, and the coordinator node is linked with the computer through USB to achieve the sending, reception and dispose of data; the data collection terminal nodes and the coordinator node all adopt a low-power-consumption design; power of the data collection terminal nodes is supplied by batteries, and power of the coordinator node is supplied by the computer through the USB; the system can be used in a condition without AC220 V of power. The data collection terminal nodes of the static structural testing data collection system based on Zigbee wireless communication can achieve the conversion and transmission of signals, data collection and data wireless transmission, and the static structural testing data collection system has the advantages of being simple in the integral system structure and pretty high in a price performance ratio, and decreasing workload and work strength by canceling a site arrangement of signal wires.

The invention discloses a vibration damping device of a testing machine for a buckling-restrained brace structure, and belongs to the field of vibration damping control. The vibration damping device of a testing machine for the buckling-restrained brace structure comprises an upper end plate, a core material, a restraining member, an unbonded material and a lower end plate. The buckling-restrainedbrace is arranged between the lower cross beam of a structural testing machine and a base, the vibration damping devices of the testing machines for the buckling-restrained brace structures are symmetrically arranged around a test piece, and the vibration damping devices of the testing machines for the buckling-restrained brace structures and the test piece are stressed together until the testingmachine is unloaded. A force sensor is arranged at the lower end of the test piece to measure the load borne by the test piece. The vibration damping device of the testing machine for the buckling-restrained brace structure is arranged in a large-scale testing machine, so that the problem of vibration between the testing machine and the surrounding environment caused by brittle failure of the test piece can be avoided. The vibration damping device of the testing machine for the buckling-restrained brace structure is simple design and saves cost.

The invention relates to the technical field of bearing pedestal detection equipment, in particular to a bearing pedestal performance test simulation device which comprises a test board, a driving structure is arranged in the test board, an adjusting structure is arranged at the top end of the test board, a pushing structure is arranged at the end of the adjusting structure, and a clamping structure is arranged on the test board. The bottom end of the clamping structure is provided with a rotating structure, the top end of the test board is provided with a tester, the top end of the clamping structure is fixedly provided with a test handle, and the interior of the test board is slidably connected with a test block; the bearing pedestal is conveyed through the driving structure, so that the bearing pedestal testing efficiency is improved; and the height of the pushing structure is adjusted through the adjusting structure, the bearing pedestal is pushed through the pushing structure, and the pushing efficiency during bearing pedestal detection is improved. The bearing pedestal is clamped through the clamping structure, shaking of the bearing pedestal during testing is avoided, the testing block is rotated through the rotating structure, then the performance in the bearing pedestal is comprehensively detected, and the testing effect is improved.