93results about How to "Real-time monitoring of deformation" patented technology

The invention relates to a tunnel surrounding rock deformation monitoring method and a monitoring system thereof. The monitoring method is as below: (1) firstly, a laser is fixed on the inner wall of a stabilized tunnel surrounding rock, then a fixed photosensitive displacement signal monitor is arranged on a preliminary bracing of an unstable surrounding rock in the constructed tunnel, and the signal output end of the laser is opposite to the signal receiving end of the photosensitive displacement signal monitor; (2) during the monitoring, the laser sends a real-time laser signal to the photosensitive displacement signal monitor used for receiving laser signals, and in the monitoring process, the photosensitive displacement signal monitor sends monitoring data on the deformation displacement of the unstable surrounding rock to a signal processing terminal; and (3) the signal processing terminal performs automatic analysis according to collected data, and when the deformation displacement value of the surrounding rock reaches or exceeds a dangerous deformation value, the signal processing terminal sends an alarm signal via an alarming system. The method and the system thereof are favorable for reducing and avoiding casualty and loss caused by serious tunnel and laneway collapse so as to improve the construction safety.

The invention discloses a biaxial tension test device for testing the performance of sheet metal. The biaxial tension test device comprises an upper connecting structure, a lower connecting structure, a proportion adjusting mechanism, a fixture slide block mechanism and connecting rods. The biaxial tension test device with a simple pure mechanical structure is easy to maintain and mount, requires a relatively low cost and can effectively achieve a biaxial tension goal; besides, the loading proportion in two mutually vertical directions is convenient to adjust, and each connecting bolt can be adjusted to be horizontal with a chassis, so as to guarantee that specimens are in horizontal positions; and the biaxial tension test device has relatively high test accuracy and can effectively control failure time of the specimens.

The invention discloses a shallow-earthing, large-section and small-distance construction method for a rectangular pipe jacking overpass subway tunnel and relates to the field of pipe jacking construction. The method comprises the steps that firstly, the weight of soil planed to be excavated is calculated according to the reconnaissance report result, meanwhile, the weight of a concrete pipe joint is calculated, the number of applied balance weights is estimated according to the difference between the weight of the soil and the weight of the concrete pipe joint, and corresponding concrete balance weights are prepared; the deformation condition of the lower subway tunnel is monitored in real time during pipe jacking tunneling, when protruding deformation is approximate to an early warning value, the balance weights are started to be applied in a pipe jacking channel, and meanwhile deformation of the subway tunnel continues to be monitored; along with further advancing of the pipe jacking tunnel, the positions of the originally applied balance weights are kept unchanged, according to the actually measured protruding deformation value of the subway tunnel, when the protruding deformation is approximate to the early warning value, the balance weights are started to be applied to the position, corresponding to the maximum protruding deformation, in the pipe jacking channel; after all the pipe jacking construction is completed, the balance weights are withdrawn step by step. The technical aim that under the condition that grouting reinforcement, open cutting, water lowering and other measures cannot be taken, when the subway tunnel is operated in the mode of shallow underground excavation large-section rectangular pipe jacking close-range upward penetrating, the protruding deformation of the lower subway tunnel is controlled is achieved.

The invention provides a kind of cement base material to anticipate anti-crack performance test to equip and its test method, try device to include to transform to respond device and meet an emergency instrument and calculator, say of transform to respond to equip to establish a contingency slice up, the contingency slice said through lead line and meet an emergency an instrument to connect with each other, the contingency instrument said through lead line and calculator to connect with each other. Should equip test the method create and stick and have a contingency slice and transform and respond device first, then at say of transform and respond equip of inside wreath, outside wreath and scale board sprinkle and note a cement base material and anticipate wreath, dismantle to the outside wreath after protecting, adopt waterproof material and seal completely the last surface that the cement base material anticipates wreath, and places it in the temperature for 20 +-2DEG C and degree of humidity of 20%-70%, then the contingency slice and contingency are connected with each other, the contingency instrument and calculator are connected with each other. It uses the calculator with the detecting software to collect the data transferring from the contingency slice to detect. So the testing device and testing method can detect the cement base material quickly.

The invention relates to large scale component assembling and welding deformations automatic real time monitoring method. Its feature is that it uses coordinate system as measuring basis expressed by axes and generatrix in whole measuring system. The method includes the following steps: establishing the coordinate system for the whole deformation measuring basis; setting measuring point at the outer wall of the component 1 and 2; measuring the coordinate for all the measuring points; processing component 1 and 2 installing measuring and welding deformation monitoring. The invention has the advantages of realizing the monitoring without setting fixed measuring installation onsite and special tool set up, fast measuring speed, high working efficiency means three minutes per period.

The invention discloses a monitoring system, monitoring method and early warning method for coal mine tunnel surrounding rock disasters. Under the condition of no influence to tunnel transportation and operation, an unmanned aerial vehicle carries a binocular camera to collect images of surrounding rock of the inner wall of a tunnel to obtain continuous section information of the roadway; based ona binocular vision three-dimensional reconstruction algorithm, three-dimensional coordinates of the point cloud of the tunnel surrounding rock are obtained; a live-action three-dimensional model of the surrounding rock in the tunnel section measured each time is restructed; and then, sequential splicing is carried out, so that a real-scene three-dimensional model of the whole to-be-detected tunnel is obtained. According to the method, the tunnel to be measured is measured for multiple times to obtain multiple times of measurement data, the tunnel surrounding rock position information obtainedthrough measurement for the first time is used as an initial value, the result obtained through measurement for each time is compared with the result obtained through measurement for the first time,so that the tunnel deformation is obtained through calculation, automatic real-time monitoring on tunnel deformation is achieved, and the automation degree is high. The safety threshold value of eachmonitoring index is set, once the safety threshold value exceeded by each monitoring index is detected, the alarm system is started, and early warning is carried out in time.

The invention discloses a bar member deformation monitoring device. The device comprises a rigid rod (1), a power supply (2) and a signal generator (3). Two ends of the rigid rod (1) is respectively provided with a first fixing fastener (4) and a second fixing fastener (5), wherein the first fixing fastener (4) and the second fixing fastener (5) are capable of being fixedly connected to a bar member to be measured respectively; the first fixing fastener (4) and/or the second fixing fastener (5) is provided with a first electrode (6) capable of being electrically contacted with the bar member to be measured; the middle of the rigid rod (1) is provided with a monitoring fastener (7); a monitoring hole (8) is arranged on the monitoring fastener (7), wherein the bar member to be measured can runs through the monitoring hole (8) and keeps a ring gap with the monitoring hole (8); the monitoring fastener (7) is provided with a second electrode (9) in the inner circumference of the monitoring hole (8) along the circumferential direction; the power supply (2) and the signal generator (3) are in series connection between the first electrode (6) and the second electrode (9). The bar member deformation monitoring device can monitor the deformation of the bar member in real time, is simple and convenient to install, and economical and reliable. The invention also provides a scaffolding monitoring alarm system.

The invention discloses a continuous observation method and a continuous observation device for dam deformation based on an MEMS array. The continuous observation device for dam deformation based on the MEMS array is embedded at a certain depth of a foundation in a punching manner. Furthermore a certain point in the foundation is used as a reference point for starting arrangement, thereby observing deformation of the dam. The observation device is provided with embedded MEMS sensors which are distributed in a band-shaped carrier. Each MEMS sensor is connected with a processor through a data line. The processor transmits a signal to a monitoring system in a wired or wireless manner. The continuous observation method and the continuous observation device perform the following functions in the construction period of a high concrete dam and a period after completing, monitoring the deformation state of the dam body in real time, monitoring the change state between the dam body and the foundation in real time, and quickly and comprehensively reflecting all changes. Therefore an effective observation means for dam body deformation of the high concrete dam is added. The continuous observation method and the continuous observation device have advantages of simple method, easy application, high monitoring precision, comprehensive monitoring, high real-time performance and high effect. Furthermore manpower, physical resource and cost are saved.

The invention relates to an elastic deformation adjusting method for a middle frame plate in an FCT tester. The method comprises the following steps that: S1, real-time data of the deformation of a middle frame plate module is collected through a strain gauge, and is transmitted to a stress analysis module; S2, the stress analysis module converts the deformation data into strain data, identifies the maximum strain value of the middle frame plate, solves the maximum stress value of the middle frame plate, and transmits the data to a data analysis board card in real time; S3, the data analysis board card judges whether the deformation of the middle frame plate module is qualified or not according to the elastic limit stress standard of a middle frame plate material and the actual test stability strain upper limit standard, and judges whether the pressure is increased or decreased; and S4, increasing or decreasing the pressure according to a judgment result of the step S3. According to the invention, the deformation quantity of the middle frame plate can be monitored in real time, the air pressure of a pressure regulating valve is dynamically regulated, and poor contact of a probe caused by excessive deformation of the middle frame plate is prevented.

The invention relates to a calibration method and calibration device of a multi-shaft force sensor. Decomposition of a force and torque is achieved by a loading plate, high-accuracy synergic loading of six component loads of the multi-shaft force sensor is finally achieved, and the calibration accuracy of the sensor is improved. All position gestures of the multi-shaft force sensor can be obtainedonly by seven laser displacement sensors, and the device is convenient and effective. A newly-installed multi-shaft force sensor can be rapidly adjusted to a designated reference each time when a newsensor is arranged, all installation positions of all arranged sensors can be enabled to be consistent, the calibration reference consistency is ensured, and the consistency of different batches of sensors is greatly improved. After the sensor is installed by employing the calibration method and the calibration device, the deformation of the sensor under effects of different loads can be monitored in real time during the calibration process, and the deformation is used as a technical parameter of the sensor and is provided for a user; and compared with a traditional means for estimation by afinite element theory, the parameter acquisition method has the advantages of more trueness and more accuracy.

The invention relates to the technical field of subway safety, in particular to an operation subway station deformation monitoring method. According to the technical scheme, prisms are arranged at a datum point and a measuring point in a station tunnel according to monitoring specifications and a subway management method, and a total station is arranged at a set station; after the arrangement is finished, an initial value of a monitoring project is measured through the total station; after construction is started, real-time measurement is conducted through the total station to obtain a monitoring project actual measurement value, and the monitoring project actual measurement value is compared with the monitoring project initial value; and comparison results are graded and the results are fed back to a responsible unit. The deformation trend and the deformation amount of the subway tunnel during road construction can be monitored in real time, the deformation rule and characteristics ofthe tunnel are mastered, and data support is provided for guaranteeing subway safety.

The invention relates to an elastic deformation adjusting device for a middle frame plate of an FCT tester. The elastic deformation adjusting device comprises a pressing plate module, a needle carrierplate module, a strain gauge, a middle frame plate module, a dynamic control module and a driving module. The middle frame plate module is installed on an in-out driving module, strain gauges are installed on the middle frame plate module at equal intervals, and the strain gauges are connected with the stress analysis module to provide real-time deformation data for the stress analysis module. The dynamic control module uses the stress analysis module to collect middle frame plate module deformation real-time data input by the strain gauges, and controls the deformation of the middle frame plate module by adjusting upper and lower driving modules. According to the invention, the deformation quantity of the middle frame plate can be monitored in real time, the air pressure of a pressure regulating valve is dynamically regulated, and poor contact of a probe caused by excessive deformation of the middle frame plate is prevented.

The invention discloses a concrete self-contraction deformation and thermal expansion coefficient measuring device and a measuring method. The device comprises: a mold and a lining template, wherein the mold is a square container with an opening in the upper portion, the lining template comprises a lining plate attached to the periphery of the inner wall of the mold and a polytetrafluoroethylene layer arranged on the bottom face of the inner side of the mold, and ducts are formed in the two ends of the mold respectively; a displacement testing system which comprises a data acquisition module,measuring heads, displacement sensors and guide rods, wherein the measuring heads, the displacement sensors and the guide rods are arranged corresponding to the ducts, the measuring heads and the ducts are correspondingly pre-buried at the end of a concrete test piece, one ends of the guide rods are connected with the measuring heads, the other ends of the guide rods are connected with the displacement sensors, and the data acquisition module is connected with the displacement sensors; a temperature control system which comprises a temperature sensor, a temperature control soft body layer anda temperature control module, wherein the temperature sensor is pre-buried in concrete, the temperature control soft body layer is attached to the inner side of the lining template, a plastic film isfurther attached to the inner side of the lining template, and the temperature control module collects and controls the temperature of the temperature control soft body layer in real time.

The invention discloses a three-dimensional dilatometer. The three-dimensional dilatometer comprises a base; a pressure chamber side cylinder is arranged on the base; a top cover is arranged on the pressure chamber side cylinder; a top plate and a bottom plate are arranged in the pressure chamber side cylinder in the vertical direction; four side plates are transversely and movably arranged between the top plate and the bottom plate; rubber membranes are arranged on the inner sides of the side plates; the upper ends of the rubber membranes are fixed to the side face of the top plate; a permeable stone is arranged on the bottom plate; a soil sample located inside the rubber membrane is placed on the permeable stone; four side face measuring units are arranged on the side faces of the pressure chamber side cylinder; each side face measuring unit is composed of a transverse displacement and load measuring device element; a vertical displacement and load measuring device element is arranged on the top cover. the transverse displacement and load measuring device elements are connected with the outer sides of the side plates; the vertical displacement and load measuring device element isconnected with the top plate. The invention further discloses a working method of the three-dimensional dilatometer. According to the three-dimensional dilatometer and the working method thereof, three-dimensional deformation and expansion force in a soil sample expansion process can be monitored in real time, meanwhile, deformation of the soil sample can be verified, and the measurement precision and effect of the dilatometer are guaranteed.