81results about How to "Measurement data is stable" patented technology

The invention discloses a primary amino radical tester, which is obtained by improving a paradigm amino acid tester, is mainly used for measuring the primary amino radical content of proteins, and is popularized and application to the measurement of the primary amino radical content of various organic compounds. The tester mainly comprises a reaction part, a gas measuring part, a gas washing part and a recovering part, and has the characteristics of rapidness, accuracy, cleanliness and the like.

The invention discloses a thin-wall high temperature alloy tubing simulation extrusion device, belonging to tubing thermal-extrusion field. The device comprises a standard die set with a guiding device, and a simulation tubing thermal-extrusion mould which is arranged on the standard die set with the guiding device, the standard die set comprises an upper die holder, a lower die holder, a guide pillar and a guide bush, one end of the guide bush is connected with the upper die holder, the guide post is connected with the lower die holder, and the other end of the guide post is sheathed in the guide bush and can move along the guide bush up and down. The simulation tubing thermal-extrusion mould comprises an extrusion shaft, an extrusion needle, an extrusion pad, a positioning frame, an extrusion container inner lining, an extrusion container outer lining, a die cushion, a cushion block and an extrusion die. The device of the invention has good popularity; the guide post and the guide bush are adopted, the die cushion and the extrusion container have positioning ring coordination, the extrusion needle and the extrusion pad have guide coordination, good alignment, and convenient and flexible use; the time consumption of experimental process is short, the efficiency is high, the material use ratio is high and the cost is low.

The invention discloses a guide blade water flow measuring clamp and a guide blade water flow measuring method. Improvements on aspects of a sealing pad, a clamp passage structure and a water inlet waterway control are made. The sealing pad is changed into a mode that a blade is integrally contained and sealed and cavity passage docking is reserved, so that effective sealing is realized and the objective of multi-passage measuring is realized; four corresponding water incoming passages are designed for a clamp corresponding to the blade according to the position of a hole of the blade to be suitable for water incoming systems of four cavities of the blade. By the guide blade water flow measuring clamp and the guide blade water flow measuring method, the four cavities of the blade can be communicated with the four water incoming passages of a measuring system simultaneously only by clamping and mounting the blade for one time, and when measuring any cavity of the blade, water flow value of the cavity can be acquired only by opening a control valve. The guide blade water flow measuring method is simple and convenient to operate and stable in data, and the guide blade water flow measuring clamp is timesaving, laborsaving and good in sealability.

The invention belongs to the large-aspect-ratio deep hole inner type cavity and external diameter form and location tolerance precision detection equipment filed and relates to large-aspect-ratio hollow-thin-wall thin and long shaft precision detection equipment and a detection method thereof. The detection equipment comprises a pedestal, a measuring bar, an inner measuring head and a movement mechanism, an outer measuring head and the movement mechanism, a workpiece-support mobile platform, a calibration ring, a measured workpiece and a control processing unit. The workpiece-support mobile platform can drive the measured workpiece to move along an X direction. The inner measuring head and the isntalled movement mechanism, and the outer measuring head movement mechanism move along a Z direction. The calibration ring is used for establishing connection between the inner and outer measuring head. The control processing unit is used for compiling and measuring the program, collecting measured data and carrying out data processing so as to acquire a demanded workpiece form and location tolerance. By using the large-aspect-ratio hollow-thin-wall thin and long shaft precision detection equipment and the detection method thereof, measurement accuracy is high, a measurement length is long, measuring efficiency is high and usage is convenient.

The invention discloses a device for measuring crop stem lodging resistance strength and a method for measuring stem lodging resistance strength by using the device. The device includes a force application mechanism, a tensile mechanism, a stem inclination collection mechanism and a stem fixture which is fixed on a crop stem. The force application mechanism comprises a base and a mobile tensile component installed on the base through a hinge; the mobile tensile component includes a tension rod, pedals and a mobile fastening part arranged on the tension rod; and a tension sensor is arranged on the tensile mechanism. The device for measuring crop stem lodging resistance strength can realize storage of a large amount of measured data in measurement of crop stem lodging resistance strength, and can realize the output of the measurement data; and repeated and convenient measurement can be carried out in the measurement of crop stem lodging resistance strength, and stable measurement data can be obtained. The method for measuring crop stem lodging resistance strength can obtain more accurate and reliable tensile strength measurement data in the measurement of crop lodging resistance.

The invention relates to the field of the constructing of bridge engineering, and discloses a mounting, measuring and positioning device for steel pipe arch segments and a construction method for the mounting, measuring and positioning device for the steel pipe arch segments. The construction method comprises the following steps that reflective patches are symmetrically arranged on the upstream side and the downstream side of each of the steel pipe arch segments, wherein an included angle between the reflective patches and a waist line of an arch rib of the corresponding steel pipe arch segment is a mounting included angle of the arch rib of the corresponding steel pipe arch segment; and measurement is completed in the manner of being matched with a tacheometry through the reflective patches, so that each of the steel pipe arch segments is accurately positioned. According to the construction method disclosed by the invention, mounting of the steel pipe arch segments can be accurately controlled, time for measuring is shortened, measuring data is stable, and a measuring staff does not need to construct or operate on the arch ribs, so that the safety risk is low; and long-term observation can also be real-time performed on the erected arch rib segment, and a data support is provided for the closure of the steel pipe arches.

The invention discloses a vehicle-mounted real-time tire pressure monitoring device, which comprises a sensor, a signal collection module, a frequency conversion module, a central processing module and a display module, wherein the sensor comprises two metal rings which are axially oppositely arranged, and a piezoelectric ceramic ring is arranged between the two metal rings; the outer diameter of the piezoelectric ceramic ring is equal to that of each metal ring; an electrode ring sheet is arranged between each of two axial ends of the piezoelectric ceramic ring and the corresponding metal ring; the sensor is connected with the signal collection module, the frequency conversion module, the central processing module and the display module in sequence; the frequency conversion module is composed of a power amplifier, a primary filter, a low frequency amplifier, a frequency mixer, a secondary filter and a medium frequency amplifier; the power amplifier is connected with the signal collection module; the medium frequency amplifier is connected with the central processing module. The vehicle-mounted real-time tire pressure monitoring device is good in sealing effect, high in measuring precision and stable in data measuring; a traffic accident is avoided and no environment pollution is caused.

The invention discloses an open channel section water flow online measuring device and a measurement and control method. The device comprises a measuring supporting frame, a measuring rod assembly is fixedly installed on the measuring supporting frame, a side rod assembly communicates with a signal processing control host 11, the measuring rod assembly comprises a measuring rod 8 and a measuring rod driving mechanism, and a set of sensors are arranged on the side rod 8. The measuring rod driving mechanism comprises a measuring rod lifting motor 10, an output shaft of the measuring rod lifting motor 10 is fixedly connected with a coded disc 4 and a shaft angle encoder 5, and the coded disc 4 is fixedly connected with the measuring rod 8. The technical problem to be solved by the invention is to provide the open channel section water flow online measurement device and the measurement and control method so as to solve the problems that the existing open channel flow measurement equipment realizes multi-vertical-line multi-measurement-point water flow real-time online measurement according to relevant national standards, and the measurement is inaccurate under the conditions of turbid water body, silted channel, sundries in the water body and the like. The problem of real-time online flow measurement of the open channel can be effectively solved.

An arc end tooth addendum measuring method comprises the following steps: using the scanning probe of a three-coordinate measuring machine to measure the addendum of an arc end tooth, and acquiring actual contour data points of a standard concave tooth at the reference circle of the end tooth through a cylindrical scanning function; establishing a rectangular coordinate system, measuring a datum plane A, determining a z-axis direction and an oxy plane, measuring a benchmark hole, setting the center of the hole as the origin of coordinates o, and taking any direction as an x-axis direction; and setting end tooth measurement parameters, selecting Edit scanning data in the three-coordinate measuring machine, and setting selected unknown circumferential scanning. By using the arc end tooth addendum measuring method, the detection precision of standard arc end tooth addendum is improved.

The invention discloses a charging bucket liquid level measuring device and method as well as dispensing equipment, relating to the technical field of tobacco production. The technical problems in the prior art, such as lower precision in liquid level detection of a charging bucket and unstable measurement dat, can be solved. The charging bucket liquid level measuring device provided by the invention comprises a force transmission component, a weighing device and a supporting component; the force transmission component is fixedly connected with the charging bucket; the weighing device is arranged on the supporting component; the force transmission component abuts against a stress point of the weighing device; and the weighing device can be used for measuring the weight of the charging bucket or the total weight of the force transmission component and the charging bucket according to the size of an abutting force acting on the stressed point. The dispensing equipment provided by the invention comprises the charging bucket liquid level measuring device provided by the invention. With the adoption of the charging bucket liquid level measuring device and method provided by the invention, the liquid level detection precision of liquid inside the charging bucket can be improved.

The invention discloses a sensor which is used for measuring the gas of elementary substance and the compound gas. The sensor comprises an air chamber, an infrared transmitter, an infrared receiver, a reflector, an air inlet and an air outlet. The infrared transmitter is arranged at the position of the air inlet on the inner wall of the air chamber; the infrared receiver is arranged at the position of the air outlet on the inner wall of the air chamber; the inner wall of the air chamber with the infrared transmitter is provided with a reflector array I; the inner wall of the air chamber with the infrared receiver is provided with a reflector array II; the inner wall of the air chamber without the reflector array is uniformly coated with the substance which is used for absorbing the useless light or preventing the air chamber from absorbing the infrared light. The sensor has the advantages of simple structure, low costs, accurate measurement results, and reliable work.

The invention relates to a reciprocating rotary reducer comprehensive performance test device, which comprises a rack, a servo motor, an input-end torque revolution sensor, a lifting mechanism, a brake, a data acquisition box and an output-end test mechanism, wherein the rack comprises a base and two guide columns; a top beam, a middle beam, a moving beam and a lower beam are arranged between the two guide columns sequentially from top to bottom; the servo motor is fixedly arranged on the moving beam; the input end of the input-end torque revolution sensor is connected with the servo motor through a coupling I; a mounting flange for mounting a to-be-tested reducer is arranged on the middle beam; and the output-end test mechanism comprises a spindle sleeve, a round steel grating ruler assembly, a round steel grating ruler seat and an output-end torque revolution sensor. The test device has the advantages that the structure is reasonable; the test precision and the efficiency are high; the application range is large; the test items are complete; the test cost is low; the actual working condition can be simulated during the test process; and the operation is simple.

The invention discloses a peripheral displacement monitoring and measuring system during tunnel construction. According to the system, one end of a tunnel vault measuring point hook is provided with a thread head, a plastic sleeve can be put in a surrounding rock borehole during embedding, and the plastic sleeve is extruded by screwing the thread head, so that the plastic sleeve is fixed in the tunnel vault surrounding rock; one end of a side wall measuring point hook is fixed in the tunnel side wall surrounding rock, and the other end of the side wall measuring point hook is provided with a hook; a convergence meter measuring hook can be fed to the tunnel vault measuring point hook through a supporting telescopic rod with an electromagnetic plate, the ruler hanging process is finished, similarly the convergence meter measuring hook can be detached from the vault measuring point hook, and the ruler folding process is finished; a steel rope is tightened by employing a clockwork roller and is fixed through a positioning pin, the tension of the steel rope is controlled by adjusting an adjusting nut, and when the window reading of a tension sensor is a pre-tensioning value, the convergence value suspended between two measuring points can be read. The peripheral displacement monitoring and measuring system has the advantages of convenience in ruler hanging, accurate measurement, reliable data, backlight display and repeated utilization, the measured data can be automatically stored, and the side wall hook is prevented from being damaged.

The invention discloses a sensor used for measuring the water content of gas, comprising a gas chamber, a base, a filter net, a crystal oscillator, and a three-step amplification pipe; the gas chamber is movably connected on the base which is provided with the crystal oscillator and the three-step amplification pipe; the crystal oscillator is connected with the three-step amplification pipe; the gas chamber is provided with an air inlet and an air outlet; the gas chamber is internally provided with the filter net which is sufficiently contacted with the gas chamber; the internal wall of the crystal oscillator is attached by a hydrophilic film layer; the top of the crystal oscillator is provided with a plurality of holes. The sensor of the invention used for measuring the water content of the gas has the advantages of quick response speed, stable data measuring, long service life and low cost.

The invention relates to the technical field of field distribution detection, on-line debugging and fault diagnosis of a Ka frequency band circuit, in particular to a magnetic coupling near field probe. A Ka frequency band base plate integrated magnetic coupling near field probe comprises a first circuit base plate, a second circuit base plate, a first metal structure element, a second metal structure element and a connector. The probe has the advantages that the magnetic coupling probe based on double-layer metal medium base plates is adopted, a PCB (printed circuit board) process is adopted for being matched with simple machining process manufacturing, the manufacturing is simple, the cost is low, the size is small, and the transmission performance is good. The probe does not need plastic sleeve protection, the direct handheld operation can be realized, a special test frame is not needed, and the short circuit danger is avoided. The probe is suitable for being used for Ka frequency band circuit magnetic field measurement, the demand on the space is small, the adaptability is high, and the data measurement is more stable.

The present invention discloses an overheating protective device of a pressure sensor. The objective of the invention is to prevent a pressure sensor from overheating when the pressure sensor measuresa voltage of a medium. The overheating protective device comprises a pedestal, a hinged pipe joint and a radiating tube. The pedestal is connected with the pressure sensor; the hinged pipe joint is connected with a medium; one end of the radiating tube is communicated with one side of the pedestal, and the other end of the radiating tube is communicated with the hinged pipe joint, wherein the hinged pipe joint transmits the pressure of the medium to the pressure sensor through the radiating tube and the pedestal, and the radiating tube is configured to perform heat radiation and cooling of the pressure of the medium. The overheating protective device of a pressure sensor can play an efficient overheating protection effect on the pressure senor, prolongs a service life and ensures work reliability, and measurement data is more accurate.

The invention provides a hydraulic drive type podded propulsor for testing. The hydraulic drive type podded propulsor for testing comprises a podded propulsor unit and further comprises a hydraulic control system; a propeller drive of the podded propulsor unit is a hydraulic motor; L-shaped rigid oil pipes are mounted on an oil inlet and an oil outlet of the hydraulic motor; the L-shaped rigid oilpipes are connected with a rigid oil pipe disposed along a pod supporting rod through a rigid oil pipe joint; the rigid oil pipe passes through a flange plate of the pod supporting rod; the rigid oilpipe on an upper end of the flange plate of the pod supporting rod is connected with a universal rotating joint; the universal rotating joint is then connected to one section of the rigid oil pipe; the hydraulic control system comprises a hydraulic pump station and a hydraulic motor controller; an oil outlet and an oil return port of the hydraulic pump station are connected with the last sectionof the rigid oil pipe through a flexible oil pipe. The hydraulic drive type podded propulsor for testing is suitable for development and research of the podded propulsor and has the advantages of small size, good stability, light weight and convenient assembly and disassembly.

The invention provides an electronic digital display lever indicator which is related to a displacement metrologic instrument. The indicator comprises a main body, a surveying rod, a handsetting lever, a lever arm and a bell crank lever; wherein, the surveying rod is hinge jointed on the main body and provided with a measuring head, the handsetting lever of a deflector rod is arranged in the main body and provided with an upper contact side face and a lower contact side face, the lever arm is hinge jointed on the main body and provided with a upper pulling pin and a lower pulling pin which are matched with the upper contact side face and the lower contact side face on the deflector rod in the handsetting lever, the bell crank lever of a bell crank lever arm is at right angles to the lever arm and provided with a contact terminal, the lower end of a movable shaft which is arranged on the main body and can move upward and downward is contacted with the contact terminal on the bell crank lever arm, the movable grid in a capacitance grid electronic digital display assembly which is provided with a movable grid, a fixed grid and a signal processing circuit with a display screen is connected to a movable shaft, and the resolving power of the capacitance grid electronic digital display assembly is 0.01 mm or 0.001 mm. The invention uses lever reversion and lever operation to digitally display results, and has the advantages of visualized and exact reading and low manufacture cost; and in addition, the resolving power is 0.01 mm or 0.001 mm.

The invention discloses a rubber volume change measuring device and method based on magnetic suspension. The device comprises an electronic balance (1), the electronic balance (1) is provided with a weighing tray (3) and a control panel (2), and the weighing tray (3) of the electronic balance (1) is provided with a magnetic suspension base (5); the electronic balance (1) is further provided with asolution containing rack (6), the solution containing rack (6) is provided with a solution tank (7), the solution tank (7) contains a solution, and a magnetic suspension float (9) is placed in the solution tank (7) and provided with a sample platform (10). The device has the advantages of being easy to operate and accurate in measurement.

The invention discloses a blade bounce value detection tool of a water pump assembly impeller. The blade bounce value detection tool comprises a supporting plate, a dial indicator, and a dial indicator fixing block disposed on the supporting plate. The supporting plate is provided with a positioning pin, which is disposed in a water pump assembly housing in a clamped manner for the positioning. In the positioning state of the positioning pin, the measuring head of the dial indicator is contacted with the impeller blade. By adopting the above mentioned structure, the blade bounce value detection tool is advantageous in that 1, the dial indicator fixing block is used for fixing the dial indicator, and during the use of the tool, the dial indicator is not required to be calibrated again each time when the detection product is replaced, and therefore the operation is simple; 2, during the measurement, the positioning pin is used for the positioning of the water pump assembly impeller housing, and the measuring head of the dial indicator is contacted with the blade of the impeller, and by rotating the water pump assembly belt pulley manually, the swinging value of the dial indicator can be seen by the eyes, and therefore the measuring data is accurate and stable.

The invention relates to a steel box truss arch bridge mounting, positioning and monitoring integrated construction method, and belongs to the technical field of bridge engineering measurement construction, because a first prism device is already mounted on a monitoring point before a chord member is hoisted, when the chord member is hoisted, a measurer only needs to use a measuring instrument onthe ground to measure a first actual node coordinate at a chord member node, measurement positioning is realized, and the measurer does not need to hold a prism by hand to measure a steel box truss arch bridge from a middle rod; and the first actual node coordinates are substituted into the constructed spatial axis model to calculate the linear parameters of the steel box truss arch bridge, and the position of the chord member is adjusted to be hoisted according to the linear parameters so that the deformation monitoring and linear monitoring of the arch rib can be realized without moving thenode coordinates forwards or backwards and converting node deviation. Therefore, the measurement precision and the measurement efficiency can be improved, the measurement cost is reduced, and the safety in the measurement process can be improved.

The invention provides a carbon fiber wound gas cylinder. The gas cylinder comprises a gas cylinder body, n optical fibers with a plurality of grid points are uniformly wound on the gas cylinder body, and the plurality of grid points are uniformly distributed on each optical fiber; and when the optical fibers are wound, it is ensured that the n grid points are uniformly distributed on the radial section of the position of any grid point on the gas cylinder body, the grid points are arranged into n straight lines in the axial direction of the gas cylinder body, and the axial distances between every two adjacent grid points are the same. A gas cylinder health state evaluation equation is established, and the local deformation condition of the gas cylinder is measured by combining wavelength data returned by the demodulation optical fiber to obtain the fatigue state of a certain position of the gas cylinder and the overall health state.

The invention belongs to the technical field of experimental teaching equipment, and discloses an experimental teaching device for measuring light velocity in an optical fiber. The device comprises amodulation signal source, a modulation signal electronic-to-optical conversion and optical signal transmission module, fiber channels, a modulation signal photoelectric conversion and pulse width regeneration adjustment circuit, an XOR logic digital fiber length measurement module and an optical power meter. Under the condition that the circuit delay is constant, the time delay of a receiving endregenerative signal relative to a transmitting end reference signal is measured twice by the fiber channels with lengths L1 and L2 respectively, and the transmission time of a modulation signal in theL1-L2 fiber length is obtained; the length of the optical fiber is measured by an XOR logic digital fiber length measurement instrument; the light velocity in the optical fiber can be calculated according to the transmission time of an optical signal in the optical fiber and the optical fiber length. The experimental teaching device for measuring the light velocity in the optical fiber has the advantages that the physical concept is clear, the physical phenomenon is visual, the measurement technology is novel, the data is stable, the result is accurate, and the device is an effective teachingplatform for cultivating students' sense of innovation consciousness and capacity.

The invention relates to an automatic detection system for video integration power generation flood drainage. The automatic detection system is characterized in comprising a plurality of collection terminals, a monitoring center server and a mobile terminal, wherein the collection terminal transmits data to the monitoring center server through wireless communication; and the mobile terminal can access the data of the monitoring center server through the wireless communication. The automatic detection system is an integration platform which combines the collection, the storage and the query ofwater and rainfall information data and images into a whole. The system takes the lead in combining traditional water and rainfall information, field images and early warning systems into a whole, andthe collection terminal basically realizes self power supply, no maintenance and channel self-adaption. The automatic detection system can favorably meet the disaster prevention alarming requirementsof unattended transformer substations, transformer substations with few people on duty and other power generation areas.

The invention discloses a spraying material and an electromagnetic flowmeter without an inner liner. The spraying material is prepared, by mass, 55-65% of modified isocyanate and 35-45% of modified silicate solution. According to the spraying material and the electromagnetic flowmeter without the inner liner, a traditional inner is replaced by a sprayed insulating layer, when the spraying materialis applied in a living sewage environment or a strong acid-base high-corrosivity environment or water with high sand content, stable and accurate measurement data can be stably obtained, and long-term operation is achieved. The spraying material and the electromagnetic flowmeter can adapt to various water quality conditions, and the service life is prolonged; instead of being conducted at high temperature and pressure, spraying operation can be conducted at normal temperature and pressure and is simple and convenient.

The invention discloses an image measuring instrument and a non-linear error correcting method and a correcting plate thereof. The correcting plate is provided with a plurality of standard circles and a plurality of concentric circles which are arranged in the form of a matrix, wherein the plurality of concentric circles are divided into two groups; in a first group of concentric circles, a standard circle at a leftmost lowermost corner is taken as a standard; in a second group of concentric circles, a standard circle at a rightmost uppermost corner is taken as a standard; and the plurality of concentric circles are arranged at intervals on the basis of the standard circles. In the correcting plate provided by the invention, the coordinate of a circle center is selected by measuring in a point taking way instead of aligning the edges of a line, so that a point taking error caused by the width factor of the line is reduced. In the non-linear error correcting method for the image measuring instrument provided, twice non-linear error correction is performed on a workbench, and two non-linear error correcting values are averaged, so that the measuring accuracy is increased; and moreover, non-linear error correction is performed along longitudinal and transverse directions at the intervals of 10 millimeters in the measuring range of the workbench, so that mechanical errors are effectively eliminated or reduced.

The invention belongs to a resistance test value correction method, and relates to a method of rapidly realizing accurate measurement on the resistance of a composite part. The method for measuring the resistance of the composite part is characterized by comprising the following step of: step 1, by taking a measured contact point as a center, cleaning and polishing a paintcoat and floating glue on the surface of the composite part so as to expose an inner copper net; step 2, cementing two pieces of copper foil paper on the copper net with conductive glue; step 3, by taking the two pieces of copper foil paper as contact points, measuring the resistance. The method for measuring the resistance of the composite part is capable of rapidly and accurately measuring certain types of electromechanical resistance; on the premise that an airplane part structure is not changed, a pseudomorphic increase phenomenon of the resistance measurement value is eliminated, the actual measurement data is verified by virtue of twenty continuous airplanes, and the data is stable and normal.

The invention discloses a water flow on-line testing device which comprises a fixing plate, four corners of the fixing plate are respectively provided with mounting holes, and the water flow on-line testing device is characterized in that one side of the fixing plate is fixedly connected with one end of a cross rod of an L-shaped fixing rod, and the other end of the L-shaped fixing rod is fixedly connected with the middle of the cross rod; the two ends of the cross rod are fixedly connected with one ends of the straight groove rods respectively, the other ends of the straight groove rods are fixedly connected with the two ends of the vertical rod of the inverted-U-shaped support respectively, the inverted-U-shaped support is connected with the ditch depth testing module, and the two straight groove rods are connected with the water flow velocity testing module respectively. The invention relates to the technical field of open channel flow measurement, in particular to a water flow online measuring device. The device can conveniently measure the water flow velocity.

The invention provides a device and method for measuring wall thickness dimension of a hole bottom of a deep hole part, which comprises a base, wherein an upright post and two top columns are vertically and fixedly connected on the base; sliding cross beams are arranged on one side of a connecting surface of the top column; the two top columns are movably provided with base sliding cross beams andare connected with each other through the sliding cross beams; the sliding cross beams are provided with dial indicators; the measuring head of the dial indicator and the central line of the top column are on the same straight line. According to the device and method for measuring wall thickness dimension of the hole bottom of the deep hole part, the measuring device and the measuring method canbe used for measuring the wall thickness dimension of the hole bottom of the deep hole below IT8 class, and have the advantages of stable measurement data, simple operation and quick measurement. Themeasuring device and the measuring method can be widely applied to measuring the wall thickness of the hole bottom of the deep hole in various ways.

The invention belongs to the technical field of the civil engineering material performance testing equipment, and relates to a concrete AC resistance measurer. A master control CPU, a driving circuit,a measurement circuit and a liquid crystal screen display circuit are integrated into the measurer; the master control CPU is electrically connected with each of the driving circuit, the measurementcircuit and the liquid crystal screen display circuit; the driving circuit is electrically connected with the measurement circuit; the liquid crystal screen display circuit is electrically connected with an external liquid crystal screen, thereby providing the AC in voltage at 1 volt and the frequency at 1000 hertz; the concrete test piece is measured; a resistance value and the permeability are directly and conveniently displayed on the liquid crystal screen; the measurement process is simple, the testing speed is fast, the operation is convenient, a complex external circuit is avoided, the measurement time is short, and an operation of measuring a charge numerical value passing through the concrete test piece for a long time is avoided; the measurer is simple in structure and convenientto carry; the influence on the testing precision by the polarization reaction and overtop temperature can be avoided, and the measurer has high practical value.