134 results about "Resistance monitoring" patented technology

The invention discloses an alarm device for preventing fatigue driving of a motor vehicle. The alarm device for preventing the fatigue driving of the motor vehicle comprises a single chip microcomputer, and an input interface and an output interface of the single chip microcomputer, and is characterized in that the input interface is connected with a fingerprint recognition device, a face and eyes positioning device, a heart rate monitoring device, a skin surface resistance monitoring device and an alcohol detection device respectively; the output interface of the single chip microcomputer is connected with an alarm device, a vehicle control system, a vehicle-mounted terminal, a card reader and a recorder respectively; the fingerprint recognition device, the heart rate monitoring device, the skin surface resistance monitoring device and the alcohol detection device can be arranged in a key, a safety belt or a steering wheel of the vehicle. The alarm device for preventing the fatigue driving of the motor vehicle has the advantages that the heart rate monitoring device and the skin surface resistance monitoring device can monitor the current state of a driver in real time, timely remind a system whether the driver is going to enter a sleepy period and ensure to give out a system prompt or start the alarm device in first time so as to reduce traffic accidents.

The invention discloses a high-efficiency air filtering unit which can detect leakages on site and disinfect in situ. The high-efficiency air filtering unit comprises a detection gasoloid generating section, a mixing section, an upstream sampling section, a high-efficiency filter pressing device, a scanning and leakage detecting device, a disinfecting device, a filter resistance monitoring device, and the like, wherein the filter pressing device adopts an eccentric pressing mechanism, and a filter replacement mode is a bag-in and bag-out mode; the scanning and leakage detecting device is an automatic scanning and leakage detecting device; and a line scanning detecting method is used as a detecting technology. The high-efficiency air filtering unit has the characteristics of good box body tightness, disinfectant corrosion resistance and safe and convenient filter replacement. The high-efficiency air filtering unit meets the requirement for biosafety, and is suitable for blowing-in and exhaust handling systems of high-grade biosafety laboratories.

The invention discloses a typhoon prevention and resistance monitoring emergency method for an electric power system. The method comprises the steps of determining monitoring objects and ranges; modeling typhoon influencing power grids; visually displaying typhoon resistance information; sending data of a monitoring emergency system; and carrying out automatic collection and analysis. A whole process and total elements of a typhoon are visually displayed. Typhoon influences and emergency resources are visually displayed. Automatic statistics is carried out on power grid data and the emergency resources. Current situations that the automation degree of disaster damage data collection is low and artificial statistics is mainly carried out on the disaster damage data are changed. The timeliness and accuracy of the emergency data are ensured. A typhoon resistance technical means is improved. The safe operation and reliable power supply of the power grids can be ensured when the typhoon lands.

The invention discloses a system and a method for detecting damage of a metal component nondestructively, belonging to the field of nondestructive detection for damage of metal components. The system comprises a dynamic micro-resistance monitoring system, an acoustic emission signal collecting system, an infrared heat signal collecting system and a force and displacement signal collecting system, wherein the dynamic micro-resistance monitoring system, the acoustic emission signal collecting system, the infrared heat signal collecting system and the force and displacement signal collecting system are respectively electrically connected with a main control system; the main control system is used for receiving and collecting micro-resistance data information, acoustic data information, heat data information and force and displacement data information. Due to the fact that the system can collect various kinds of information on electricity, heat, sound, force and the like simultaneously, so that the system breaks through the limit of shortage in veracity of single judgment data and ensures the accuracy for damage detection of the metal component under a nondestructive state, and then, the reliability and the accuracy of the service life estimation of an apparatus are greatly improved.

The invention discloses a probe module for detecting a contacting effect. In the process of liquid crystal alignment, the probe module is used for detecting the contacting effect of the probe module self and a substrate external test circuit of an LCD panel. The probe module for detecting the contacting effect comprises at least two telescopic probes and a resistance monitoring device, wherein the at least two telescopic probes are mutually insulated, the resistance monitoring device is electrically connected with the at least two mutually-insulated telescopic probes, and the resistance monitoring device monitors the resistance between the at least two mutually-insulated telescopic probes to judge the contacting effect of the at least two mutually-insulated telescopic probes and a contact surface. According to the probe module for detecting the contacting effect, due to the facts that a plurality of contact points are formed between the probe module and a contact object and the contact points are in mutual independence, the resistance monitoring device of the probe module is used so that the resistance values among a plurality of probes obtained through measurement can be used for timely judging the contacting effect between the probes and the contact object, and thus cause seeking and handling time due to abnormal monitoring currents in an existing liquid crystal alignment process is saved.

A fuse resistance monitoring system is disclosed to comprise at least one non-regenerative sense amplifier; at least one fuse module having at least one fuse cell coupled to a first terminal of the sense amplifier; and a reference resistor coupled to a second terminal of the sense amplifier, wherein a source voltage node between the fuse module and the sense amplifier is monitored to reflect a resistance of the fuse cell.

The invention discloses a mining overlying strata movement influence mine pressure simulation experiment device and a cooperated monitoring method, and belongs to the field of mining engineering. The method comprises stope overlying strata movement monitoring, stope overlying strata stress transmission monitoring and stope mine pressure display monitoring; the stope overlying strata movement monitoring comprises key layer primary breaking movement monitoring and key layer period breaking movement monitoring; the stope overlying strata stress transmission monitoring is the stress transmission monitoring on each key layer bottom interface of the overlying strata; the stope mine pressure display monitoring comprises support frame work resistance monitoring and support frame compression quantity monitoring. All detections are collected by the same dynamic collecting card and the same host computer. The device has the advantages that the structure is simple; the use is convenient; the detection effect is good; the influence of the stope mine pressure rule the abnormal phenomena, the period fracture movement of the overlying strata multi-key layers and high-layer position key layers on the work face mine pressure can be studied.

The embodiment of the invention discloses a real-time monitoring system for insulation of an underground large-power device. The system is characterized in that a 220V onboard single-phase AC power supply is converted into 12V, 5V and 3.3V low-voltage DC power supplies for following circuits through a power module after filtering, rectifying and voltage decreasing by a power module; a main control module is that STM32F107VCT6 is used as a main control chip; the main control module is sued for preprocessing the data acquired by an insulation resistance monitoring module and a leakage current monitoring module and controls a communication module and an upper computer to keep real-time communication; the insulation resistance monitoring module is used for detecting the insulation resistance of the underground large-power device; the insulation resistance monitoring module mainly comprises a single-chip microcomputer C8051F350, an operational amplifier, a relay, three photoelectric couplers, a voltage-stabilized diode, a diode, a capacitor and a plurality of resistors. The system can monitor the insulation resistance of the underground device offline and can be also sued for monitoring the insulation resistance, leakage current, working current and other parameters of the device under electric running on real time.

The invention discloses a method for monitoring resistance of valve discs of arresters based on a resistance-capacitance network. The method includes the first step of building an arrestor three-dimensional resistance-capacitance network model based on a three-dimensional finite element static electric field, the second step of solving partition capacitance between the arrestors and capacitance of the valve discs of the arresters, the third step of installing leaked current measurement devices on flanges at the lowest ends of the arresters operating on site, and obtaining actual leaked current measurement values and actual phase angle difference measurement values of the arresters, and the fourth step of solving resistance of the valve discs of the arresters in an iteration mode. The resistance valve of the valve discs of the arresters in operating states can be accurately obtained in the method, errors are controllable, requirements of a project can be met, operation conditions of the arresters are directly and effectively monitored, and meanwhile accurate data references an be provided for power grid operation and maintenance staff; the method is suitable for being used for monitoring a high-voltage zinc oxide arrestor on line.

The invention provides a DC system insulating resistor monitoring circuit which includes: a boosted circuit, a monitoring circuit and a voltage value sampling circuit. The boosted circuit includes a first voltage booster T1 and a second voltage booster T2 and is intended for injecting PWM waves for the monitoring circuit. The voltage sampling circuit is intended for sampling the voltage of the monitoring circuit so as to compute the magnitude of an insulating circuit in the DC system. Compared with prior art technologies, according to the invention, the monitoring circuit herein increases detection accuracy by injecting DC signals. Further, according to the invention, the monitoring circuit herein can real-time monitor the malfunction of the positive and negative insulating resistors and does not affect the quality of power supply.

A thermal attach and detach method and system for surface-mounted components (SMCs) employs a planar-heater which generates heat in response to an electrical current. The heater's resistance varies with its temperature, and the resistance is read to determine heater and SMC temperature. A means of gripping an SMC is provided such that the device's I / O contacts are heated by thermal conduction from the planar-heater through and / or along the SMC's side-walls. An electrical current is provided to the planar-heater such that heat sufficient to attach / detach the I / O contacts to or from a PCB is generated. The method enables the gripping, heating, resistance monitoring and SMC temperature measuring to occur simultaneously. Several means of gripping an SMC are described, including vacuum, mechanical, adhesive and magnetic. A method which employs a heating element to heat a substrate on which SMCs may be mounted is also described.

The invention relates to an online DC power ripple and battery inner resistance monitoring system, which comprises an online battery inner resistance measurement subsystem, a DC bus voltage ripple monitoring subsystem, a DC power monitoring subsystem, a man-machine interaction subsystem and an IEC61850 remote communication subsystem, wherein the online battery inner resistance measurement subsystem uses an online battery inner resistance detector to monitor the battery inner resistance in real time, and whether the battery is intact is judged through changes of the inner resistance; the DC bus voltage ripple monitoring subsystem uses a ripple detector to motor DC bus voltage ripples, and through real-time monitoring on the DC bus ripples, long-term influences on the battery by a power supply is predicted; the DC power monitoring subsystem is in charge of monitoring normal working parameters of the DC power system; and the IEC61850 remote communication subsystem is in charge of communicating with a remote monitoring center. Periodic and continuous data tracking, recording, analysis and judgment provides a lifelong sign information file list for the DC power supply and the battery.

The subject invention relates in part to the surprising and unexpected discovery that insects that are resistant to Bacillus thuringiensis Cry toxins have measurably altered alkaline phosphatase (ALP) activity as compared to insects that are susceptible to Cry toxins. This and other surprising discoveries reported herein have broad implications in areas such as managing and monitoring the development of insect resistance to B.t. toxins. For example, the subject invention provides a simple and fast assay (enzymatic or otherwise) for detecting ALP activity levels and thereby monitoring the development of resistance by insects to crystal protein insect toxins. There was no prior motivation or suggestion to go about resistance monitoring using this simple and easy approach.

The invention discloses an oil station safe and environment-friendly integrated monitoring system. The system comprises a master monitoring center, an oil station monitoring device, an oil-gas recovering online monitoring system and a leakage monitoring system. The oil-gas recovering online monitoring system comprises a gas-liquid ratio intelligent adjusting unit, a leakproofness monitoring unit,a pipeline liquid resistance monitoring unit, an oil tank internal parameter monitoring unit, a pressure valve monitoring unit and an oil-gas exhaust concentration monitoring unit. The leakage monitoring system comprises pipeline leakage detection feeler levers and oil tank leakage feeler levers which are mounted in operating wells correspondingly. According to the oil station safe and environment-friendly integrated monitoring system, by using the oil-gas recovering online monitoring system and the leakage monitoring system in a unified mode, after the systems and all the monitoring units areused directly in a compatible mode, operating and skill requirements for oil station working staff are lowered, safety of operation of the system is improved, the system is made to conform to national environment-friendly requirements, the functions are complete, the performance is stable, mounting and transforming are convenient and do not occupy an excessively large space, and using is more convenient.

The invention discloses edge advancing resistance chiseling method, which adopts the general laser chiseling system to complete the laser generation, position, movement, and resistance monitoring, its characteristics are to control the laser beam to do following two steps of etching alternatively when feeding: 1) the two ends of outer edge along the random original edge of etching resistance are start point and end point, the self wide of laser beam etches along the outer edge of curve track, the resistance material which the laser beam passes is etched to generate new edge curve, and the laser beam stop at end point or return to start point; 2) the laser beam starts at stop point, and advances to new edge curve, and replace the original edge curve in step 1) to etch. The etched resistance has high resistance stability and high anti-electromagnetic interference, and it can secondly etch the slice resistance of functional circuit module of sensor directly to improve the auto adjusting of gain or zero position, and avoid the abrupt change of resistance and the low efficiency of manual matching resistance, and low accuracy.

The invention relates to a pipeline leakage monitoring technology, and aims to provide a system and a method for monitoring leakage of a non-metal pipeline. The system comprises a resistance value detection module, an axial monitoring electrode which is arranged right below the outer side of the pipeline in the axial direction, and an annular monitoring electrode which is arranged on the wall of the pipeline and can be in contact with a conveyed medium, one end of the axial monitoring electrode is sequentially connected with the resistance value detection module and the annular monitoring electrode through wires, the annular monitoring electrode and the terminal of the annular monitoring electrode are kept insulated from the axial monitoring electrode and the pipeline installation environment, the resistance value detection module is connected with a communication module through a signal line, the communication module is connected to a leakage analysis module in a wired or wireless communication mode, and the leakage analysis module is used for judging whether pipeline leakage occurs or not according to the resistance monitoring data change uploaded by the communication module. Detection equipment adopted by the system and the method is simple, complex detection equipment is not needed, the test method is easy to realize, and the cost of non-metal pipeline leakage monitoring isreduced.

The invention discloses a subway / coal mine backflow track insulation damage position and transition resistance monitoring method. The method comprises the following steps that a backflow track is connected to the cathode of a power substation, and the position of a connection point is selected as a reference position and a potential monitoring device is installed at the reference position; a running distance monitoring device and a traction current monitoring device are installed on a locomotive, the locomotive moves along the backflow track to the power substation, and the above three monitoring devices send recorded data to a control unit; and the control unit discriminates potential jump and corresponding jump time from received potential data, determines the running distance of the locomotive at the jump time and the total running length of the locomotive so as to determine a ground insulation damage position, and correspondingly acquire the transition resistance value of the ground insulation damage position. In the invention, the ground insulation damage position of the backflow track can be directly and conveniently monitored in on-line and real-time modes, the structure ofa monitoring system is simple, cost is suitable and the method is especially suitable for the application fields of a coal mine or a subway which adopts a direct current traction locomotive and the like.

The invention discloses an electric vehicle power battery insulation resistor monitoring device based on an amplitude-phase detection principle. The electric vehicle power battery insulation resistormonitoring device comprises a sinusoidal wave generating circuit, a feedback signal sampling circuit, a sinusoidal alternating current signal amplitude detection circuit, a feedback signal amplitude detection circuit and a phase difference measuring circuit, wherein the sinusoidal wave generating circuit is used for generating sinusoidal alternating current signals to serve as a signal source of the system; the feedback signal sampling circuit is used for feeding signals back to a sampling system; the sinusoidal alternating current signal amplitude detection circuit is used for detecting the sinusoidal alternating current signal amplitude; the feedback signal amplitude detection circuit is used for detecting the feedback signal amplitude; the phase difference measuring circuit is used fordetecting the phase difference between the feedback signals and the sinusoidal alternating current signals. After a control unit obtains the measurement signals, insulation resistance is calculated through an insulation resistor calculation formula. The electric vehicle power battery insulation resistor monitoring device can conduct detection in real time, the influence of stray capacitance on a detection result is removed, and the detection precision of the system is improved.

A device for indicating whether a conductive element has an electrical resistance equal to or less than a predetermined value or whether the conductive element is reliably connected to earth reference potential by a resistance equal to or less than a predetermined value. The device includes a clamp device for connecting the device to the conductive element and which incorporates a battery powered monitoring unit. The monitoring unit includes a current-to-voltage converter with a voltage output that is inversely proportional to the resistance of the conductive element, a comparator which compares at predetermined intervals voltage output to a pre-set reference and determines whether the measured resistance is equal or less than the predetermined value, and a signaling device which is actuated to provide an indication as to whether the measured resistance is equal to or less than the predetermined value.

A device for detecting target biomolecules is provided. The device consists of an electrically conductive membrane having a biological recognition component configured to bind a target biomolecule immobilized thereon. The membrane is connected to an electric circuit by means of electrodes. A voltage source applies a voltage to the membrane and a resistance monitoring device monitors the resistance of the membrane as a selected volume of fluid sample suspected of containing the target biomolecule is delivered onto the membrane.

The invention discloses a monitoring device of a photovoltaic grid-connected inverter insulating resistor and electronic equipment. The monitoring device comprises a main control board, a first-levelrelay, a second-level relay, a positive bus grounded bridge arm resistor set and a negative bus grounded bridge arm resistor set; when insulating resistance monitoring is conducted, firstly, the maincontrol board sends a first switch-on control instruction through a control port to the first-level relay, controls a switch channel in the first-level relay to be switched on and conducts acquisitionthrough a voltage sampling port to obtain a first voltage value; after the first voltage value is received, the main control board sends a second switch-on control instruction to the second-level relay, switches on a switch channel of the second-level relay and conducts acquisition through the voltage sampling port to obtain a second voltage value, according to the first voltage value and the second voltage value, a positive bus grounded insulating resistance value and a negative bus grounded insulating resistance value are obtained through calculation, and it is achieved that the positive bus grounded insulating resistance value and the negative bus grounded insulating resistance value are accurately monitored through a direct current method.

The invention discloses a steel rail current drainage net transition resistance monitoring system and a control method thereof. The steel rail current drainage net transition resistance monitoring system is characterized in that an intelligent control module is connected with a microcomputer management system through an Ethernet interface to receive a command from the microcomputer management system and upload the error information and the monitoring result to the microcomputer management system; the intelligent control module is connected with a steel rail potential limitation device througha communication cable to receive the operating state information of the steel rail potential limitation device; the intelligent control module is connected with a current drainage branch switch in a current drainage cabinet through a communication cable so as to control the current drainage branch to be maintained in a turned off state during the monitoring process; the intelligent control moduleis connected with a power supply module through a communication cable to receive the current data and control on / off of the power supply module; and the intelligent control module is connected with ahigh precision measurement module through a communication cable to receive the voltage data and calculate, display, upload and save the steel rail drainage net transition resistance according to the current and the voltage. The steel rail current drainage net transition resistance monitoring system has the advantages of being accurate in monitoring, being simple in operation, being high in reliability, and being easy for maintenance.

The invention discloses a method for reducing an error of an embedded resistor, and belongs to the technical field of circuit board processing and manufacturing. A resistance layer deposition region and a resistance monitoring device access region are simultaneously formed on an inner-layer circuit of a printed circuit board, the resistance of a resistance layer is monitored through the resistancemonitoring device to reach a standard resistance value during deposition of the resistance layer to fabricate the resistor. By the method, the problems that the resistance value stability is poor during an existing embedded resistor fabrication process and the resistance value of the embedded resistor does not conform to the design requirement due to process sensitivity can be solved. By employing the method, the square resistance of the embedded resistors at different batches is basically maintained consistent, is favorable in uniformity and is small in relative error with the standard resistance value, and an error standard of a primary device is conformed; and meanwhile, the method has good compatibility with a fabrication method of the existing embedded resistor, the embedment of thelarge-resistance resistor can be achieved, circuit design is facilitated, and large-scale promotion and application in the industry of the printed circuit board can be achieved.

This invention relates to an intelligent radar environment monitoring device, which is used to test the earth radar induction large current and small earth resonance current and comprises radar information monitor unit, earth resistance monitor unit, alarming unit, interface circuit and electricity supply unit. The radar information-monitoring unit comprises one processor and sensor probes connected with the earth line of the electronic device, high-speed sampling circuit and LCD display screen. The earth resistance-monitoring unit comprises one active sensor of the earth line coupled in the electronic device.

The invention relates to the field of pipeline leakage monitoring, and aims to provide an electric melting pipe with a non-metal pipeline leakage monitoring function and a machining method thereof. The electric melting pipe comprises a resistance wire and binding posts, the binding posts are arranged in tubular sheaths, the two sheaths are correspondingly provided with sealing elements, and the sheaths and the sealing elements are made of insulating materials; and one sealing element is internally provided with a built-in wire used for connecting the binding posts and an external wire, and anexternal wire access port; a part of the resistance wire is exposed in an inner cavity of the electric melting pipe and is used as an internal monitoring electrode. The novel electric melting joint provided based on the resistance monitoring principle can be used for monitoring fluid medium leakage generated in a non-metal pipeline system, and the problem that non-metal pipeline leakage is difficult to monitor is solved. Complex detection equipment is not needed, the test method is easy to implement, and the cost of non-metal pipeline leakage monitoring is reduced. And the monitoring electrodeand the binding posts are fused into a whole through welding, so that the sealing performance and the component strength are better.

According to some embodiments, a memory device having multiple memory units includes one or more redundant memory units. Upon detection of an electrical characteristic indicating a failing memory unit, one of the redundant memory units is used to replace the failing memory unit. Detection of failing memory units may be via current, voltage and / or resistance monitoring. If the electrical characteristic monitored exceeds a predetermined threshold, a memory unit is considered failing. The failing memory unit is removed from further use. The redundant memory unit is programmed to be accessible at the memory address of the removed memory unit. Replacement occurs automatically (that is, without user intervention).

The invention discloses a testing device for testing the durability of an ultrathin wearing layer in a tunnel. A control unit is arranged on one side of a testing box; a tail gas generator is furtherarranged at the bottom of one side of the testing box; a load unit is arranged in the middle of the testing box; a workbench is arranged in the middle of the testing box; an ultrathin wearing layer testing piece is arranged on the workbench; a supporting rod is installed above the workbench; a crawler belt is installed on the supporting rod; the crawler belt is provided with a rolling wheel; the crawler belt drives the rolling wheel to repeatedly roll the ultrathin wearing layer testing piece; a tire pressure monitoring module is installed in the crawler belt; the crawler belt is driven by a motor; a rolling frequency setter is electrically connected with the motor; and a resistance monitoring module is arranged in the rolling wheel. A load is provided by the rolling wheel, so that friction resistance of a tire can be directly measured; and through the tail gas generator for generating tail gas and a humidifier, different tail gas concentration and humidity conditions are simulated, sothat a real testing environment can be provided for evaluating the pavement long-term performance of the ultrathin wearing layer. The anti-skid attenuation laws of the ultrathin wearing layer in different environments are tested, so that the long-term performance of the ultrathin wearing layer is judged.

The invention discloses an assay method for field imago acquisition and ovum collection of rice leaf rollers and the virulence of pesticides to rice leaf rollers. During the imago occurrence period of the rice leaf rollers, rice filed imagoes are netted into a plastic cup which is sealed by a preservative film, cotton balls are fixed at the bottom in the cup through double faced adhesive tapes, sugar water or hydromel supplements nutrition to the imagoes, the imagoes spawn on the inner wall of the plastic cup, the ovum hatched larvae are directly subjected to bioassay, the larvae don't have to be bred indoors, and the rice seedling impregnation method for rice seedlings cultivated for 2-4 weeks (the height of 20-25cm) is adopted for determination. The method prevents larva breeding and overcomes the problem that the rice leaf rollers cannot be bred for large scale and medicament screening cannot be carried out; and moreover, the invention provides a simple and easy rice leaf roller virulence determination method for pesticide research and development organizations, so that the biological assay of the rice leaf rollers, the mixed formulation screening, and resistance monitoring are possible.

The invention belongs to the technical field of identification of drug resistance and discloses an identification method for rapidly detecting the drug resistance of plants on glyphosate and an application of the method. The method comprises the following steps: dripping glyphosate liquid medicine on two sides of the midribs of leaves of the plants to be detected by using a micro applicator, continuously performing seed culture, observing sample application parts and the whole plants for 7 days, rating and determining the drug resistance, weighing, calculating and inhibiting the medium dose. According to the method, a sample to be detected is only required to be subjected to micro sample application, the drug resistance can be identified by observation within 7 days, the sample to be detected is directly detected without obvious selected conditions, the result can be identified within 7 days, the method has obvious advantages compared with long period needed by conventional whole-plant detection, the result is consistent with the whole-plant measurement result, and the method has the advantages of convenience, time conservation, labor conservation, space conservation and capacity of directly detecting field samples and can serve as an early resistance monitoring method.