45 results about "Wireless measurement system" patented technology

The invention discloses a wireless measurement system for debugging a power transmission lines. The wireless measurement system for debugging power transmission lines comprises a wireless voltage collecting and transmitting node, a wireless current collecting and transmitting node and a wireless center master station, wherein the wireless voltage collecting and transmitting node is connected with a low voltage side of a capacitive voltage divider of an outdoor field of a transformer substation, and is used for collecting a voltage signal of the low voltage side of the capacitive voltage divider; the wireless current collecting and transmitting node is connected with a hall current sensor installed on the secondary side of a current transformer, and is used for collecting a current signal of a hall current sensor; the wireless center master station comprises a center master station wireless communication module, a server and a client; the server is connected with a wireless communication module of the center master station; data collected by the wireless current collecting and transmitting node and the wireless current collecting and transmitting node are uploaded to the wireless center master station in real time. The wireless measurement system for debugging power transmission lines, which is provided by the invention, can prevent the complex wiring operation of a wireless circuit debugging field, reduces the working intensity greatly, improves the working efficiency, and can guarantee weak current equipment of a measurement system and personal safety of measurement workers.

The invention provides a system and a method for wireless measurement of a detection instrument. The system for wireless measurement of the detection instrument comprises a control terminal and a terminal detection instrument, wherein the control terminal wirelessly communicates with the terminal detection instrument. According to the technical scheme, on the one hand, the instrument detection data can be acquired, and on the other hand, the instrument detection data can also be acquired by wireless equipment.

A grounding resistance data acquisition and analysis system based on wireless measurement modules belongs to the technical field of power measurement. In order to solve the problem in the prior art, the technical scheme as follows is adopted: the system is composed of a plurality of separate measurement modules and a central processing platform based on cloud computing; the separate measurement modules are respectively placed at points to be measured; the central processing platform based on cloud computing is placed in a measurement center; and the separate measurement modules transmit data to the central processing platform based on cloud computing by means of wireless communication. Separate measurement is adopted in the invention. Through measurement at multiple measurement points, the measurement error caused by a clamp meter measuring method can be avoided, and the management level of the smart grid can be improved. The grounding resistance can be monitored in real time, and trend analysis and early warning can be carried out. The workload of artificial measurement is reduced, and the work efficiency is improved.

The invention discloses a temperature/humidity sensor-based in-situ wireless soil suction value measurement system which comprises a measurement probe, a wireless transmission module and a data processing terminal, wherein the shell of the measurement probe is formed by assembling a main body tube, a package tube and a conical tube; a temperature/humidity sensor, a power module, a control circuit board and a wireless sending module are arranged in the shell of the measurement probe; the wireless transmission module is used for receiving the data signals sent by the wireless sending module and is connected with the data processing terminal; the data processing terminal is used for displaying and processing the measurement data. The temperature/humidity sensor-based in-situ wireless soil suction value measurement system provided by the invention is capable of acquiring the temperature and humidity in the outdoor soil body in real time and sending the acquired data to a receiving terminal in the laboratory through the wireless sending device so as to measure the suction value in the soil.

The invention discloses a transmission shaft torque calibration method, comprising steps of installing a transmission shaft to be measured on a test stand, installing a strain gauge wireless measurement system on the transmission shaft, applying a torque on the transmission shaft, outputting a corresponding voltage value through a strain gauge wireless measurement system, establishing a transmission shaft torque calibration model and obtaining a calibration coefficient through calculation. The transmission shaft torque calibration method can conveniently, fast, accurately and reliably calibrate the torque of the transmission shaft.

The invention provides a wireless measuring system for a real-time torque of a machine tool spindle. The system comprises a signal acquiring and transmitting part and a remote monitoring part, wherein the signal acquiring and transmitting part comprises a knife handle assembly, a torque sensor and a locking hood which are installed on the machine tool spindle; the remote monitoring part comprises a wireless signal receiving device and a computer processing system. The wireless signal receiving device is used for receiving signals sent by the signal acquiring and transmitting part and transmitting the signals to the computer processing system for data management and storage and display. According to the system provided by the invention, the problem of contact fatigue wear is avoided and a measuring circuit is protected. By adopting a wireless signal transmission mode based on GPRS, the transmission distance is long and the transmission data rate is high; change of the torque signal in the technical process is monitored by a remote monitoring system in real time, so that the state management, control and safe pre-warning of the technical process are achieved.

The invention discloses a wireless measurement system for tire internal and surface temperature fields in a rolling state, which includes a system host, system software, a control module, a temperature sensing module, a host radio frequency transceiver system and a control module radio frequency transceiver system, and the system software is installed on In the system host, the control module is installed on the motor shaft, and the temperature sensing module is installed in the tire or on the tire surface; the temperature sensing module is connected to the control module, the system host is connected to the host radio frequency transceiver system, and the control module is connected to the control module radio frequency transceiver system . The invention can be used for real-time measurement of the temperature field inside the tire and on the tire surface in the rolling state, which solves the technical problem that the existing technology cannot measure the internal temperature field of the tire under dynamic conditions, and also solves the problem of ordinary infrared temperature measurement on the tire surface temperature measurement The problem of low value accuracy.

The invention provides an inductance type wireless ball rod instrument. The inductance type wireless ball rod instrument is mainly composed of a ball rod instrument main machine, a center support assembly, a center cup assembly and a set ball assembly. The ball rod instrument main machine comprises an inductance measuring head assembly, a battery assembly, a circuit board assembly and a ball rod instrument main body. A wireless measuring system composed of the ball rod instrument main machine, the center support assembly and the center cup assembly is used for comprehensively detecting the precision of a CNC machine tool motion shaft. The instrument is simple to operate, high in precision, low in cost and capable of quickly detecting the precision of the CNC machine tool motion axis.

The invention relates to the field of rotational speed measurement, in particular to a draught fan wireless velocity measurement system. The draught fan wireless velocity measurement system comprises a plurality of draught fan rotational speed data acquisition devices and a master control station, wherein each draught fan rotational speed data acquisition device comprises a rotational speed measurement sensor, a microcontroller 1, a power module and a wireless transceiver module 1, and the master control station comprises a microcontroller 2, a display module and a wireless transceiver module 2. According to the draught fan wireless velocity measurement system, the wireless transmission is adopted, the input is low, the wiring is not necessary for transmission, the transmission speed is fast, the anti-interference performance is higher, the adaptability is good for working environment, and the special production environment is applicable. By means of a non-contact switch-type Hall sensor, the consistency is good, the sensitivity is high, the circuit power is low, and the Hall sensor can be connected with various logical circuits directly.

The invention discloses a wireless measuring system and method for a rotating speed of a waterproof agricultural machine crawler driving wheel. The wireless measuring system comprises a wireless rotating speed measuring device, a waterproof box, and a display device; the wireless rotating speed measuring device is installed in the waterproof box and is in wireless communication with the display device, the wireless rotating speed measuring device comprises a photoelectric encoder, a single chip microcomputer, and a single chip microcomputer wireless transmission module, QI wireless charging module capable of charging a rechargeable lithium battery, and measured data of the photoelectric encoder are transmitted to the display device through the single chip microcomputer wireless transmission module to be displayed; and the wireless measuring method comprises the steps that after data initialization, the frequency of the photoelectric encoder and the rotational direction of the driving wheel are measured, and the measured data is transmitted to the display device through the wireless transmission module through the set communication protocol to be displayed. According to the wirelessmeasuring system and method, the rotating speed of the driving wheel can be measured in a high accuracy mode, data transmission is completed through wireless communication, effective transmission isprovided, the waterproof capability is relatively high, and thus the measuring system is capable of being used for a long time in paddy fields.

The invention belongs to the field of wireless measurement systems, and relates to a UWB-based wireless measurement system. The system comprises sensor nodes, aggregation nodes and a measurement and control center, wherein the sensor nodes are connected with the aggregation node through a UWB network, and the aggregation node is connected with the measurement and control center through a wirelessnetwork; the aggregation nodes and the sensor nodes adopt a low-power-consumption design, the aggregation nodes acquire electric energy through solar energy, and the sensor nodes acquire electric energy through an alternating magnetic field formed by power line current; the aggregation node obtains standard time and position information through a GPS, the sensor nodes do not contain the GPS, and time synchronization between the aggregation node and the sensor nodes is achieved in the data communication process through a time synchronization mechanism; the sensor nodes stamp a timestamp and a sampling period on sampling data and send the sampling data to the aggregation node, the aggregation node forwards the sampling data of the sensor nodes to the measurement and control center, and meanwhile, the aggregation node temporarily stores the sampling data locally. According to the invention, time synchronization is realized in the data communication process, and the power consumption and the implementation cost are low.

The invention provides a shield tunneling machine assembly machine angle wireless measurement technical scheme, and belongs to a technology of shield tunneling machine assembly machine angle wireless measurement. A position signal of an assembly machine is fed back to a control center PLC by using a transmission device of a Bluetooth signal, and the control center PLC limits or controls various actions of the assembly machine to act within a safe range according to the current position signal. A single-axis inclinometer is connected with a first Bluetooth module group through a measurement cable and rotates along with the assembly machine, thereby saving a special cable for rotation and tensile resistance, and solving the trouble of rotation wiring of the assembly machine. The scheme provided by the invention does not need to arrange a control cable or a communication cable passing through a winding drum or a tank chain, thereby simplifying the mechanical structure design, saving the cost, and being convenient to install. The assembly machine does not need to disassemble and assemble the control cable, thereby reducing the labor, and improving the efficiency. The scheme is very suitable for the concept of efficient assembly and fast tunneling of the shield tunneling machine, and has great popularization values.

The invention relates to a distributed wireless measurement system, belonging to the field of wireless measurement and control. The distributed wireless measurement system is characterized by comprising an intelligent sensor, a wireless transmission network and a central control terminal which are distributed; the intelligent sensor is arranged at a position required for monitoring acquired data; the intelligent sensor comprises a sensor and a controller; and the intelligent sensor is connected with the central control terminal by the wireless transmission network. According to the distributed wireless measurement system, the wireless intelligent sensor is arranged in a wide area to carry out data monitoring and collecting, then the data is transmitted in a wireless transmission mode, and finally, the data is processed in a unified manner. The distributed wireless measurement system has a simple structure, can be distributed in a severe geographical environment, and is suitable for promotion and application in the related fields, and the labor cost is saved.