65results about How to "Addressing vulnerability to distractions" patented technology

The invention provides a servo motion control integrated machine system for a flying saw machine, belonging to the technical field of automatic control. The system comprises a rectifier circuit, a filter circuit, a brake circuit, a switch power supply circuit, a protection circuit, an inverter circuit, a current sampling circuit, an encoder circuit, a PWM drive circuit, a CPLD circuit, a DSP circuit, a power down memory circuit, a communication control circuit and an I/O interface circuit. The system has the advantages that the problems of oscillation, instability and even out of control of a flying saw actuator which is a servo motor caused by control signal introduction interference caused by different ground potentials of two devices are solved. The production precision is improved. The reliability is enhanced, and the response speed is improved.

The invention discloses a machine version based online detection and control method of near field electrospinning printing effect. The method includes: grounding a collecting plate of equipment and allowing the tip of an injector to be electrically connected with direct-current high voltage; starting an electrospinning system, and allowing a motion platform to start moving according to a planned path to form a taylor cone at the tip of a spray nozzle; collecting information of wire diameter size, wire drawing state, wire bifurcation and wire fracture in real time during spinning through a vision image collector and performing online feedback and control for different situations; when D and theta exceed the set range, controlling upper computer software through a matching replacement algorithm to control speed and accelerated speed of a traction shaft motor in real time by matching and converting error amount of D or theta with pulse quantity, and fine tuning the distance H from the tipto the collecting plate when D or theta reaches nearby preset value so that the printing effect is gradually close to the parameter range till printing is steady. The method has the advantages of easy implementation, simple operation and stably system operation.

The invention provides a lightning arrester discharging current monitoring system and method. The system comprises a hollow wire coil, a passive integrator, an integrated electro-optical modulator, a light source, a first optical fiber, a second optical fiber, an optical detector and a collecting device, wherein the hollow wire coil and the passive integrator are used for subjecting lightning arrester discharging currents to passive measurement, the integrated electro-optical modulator is used for converting detected electric signals into optical signals, and the optical detector and the collecting device in a control room end are used for converting received optical signals into electric signals and recording the electric signals. A problem that electricity supply of a lightning arrester end can be easily affected by circuit damaged caused by ground potential rise is solved, a problem that signal transmission is susceptible to interference is solved, and the lightning arrester end can be safely and effectively insulated from a control room.

The invention discloses an acoustic monitoring method for rock burst risks of a coal mine tunnel. The acoustic monitoring method comprises the steps of: transmitting a characteristic vibration wave signal to a coal mass through setting a vibration exciter, picking up vibration waves propagated in the coal mass by setting detectors, and calculating a longitudinal wave velocity of the coal mass between two adjacent detectors according to a first arrival time difference; and calculating a change rate of a longitudinal wave velocity in a corresponding coal mass region along with the advancing of a stope face during the coal mining process, calculating a corresponding rock burst risk index according to a logarithmic relationship between the coal rock burst risk and the change rate of the longitudinal wave velocity, and grading the rock burst risk index. The acoustic monitoring method can determine rock burst risk regions and risk levels precisely, is simple in operation and low in cost, has good applicability, and is of great significance in selecting reasonable prevention and control measures and guaranteeing safe and efficient mining of the working face.

The invention discloses a vehicle detection sensor which comprises a magnetic field detection device for detecting with a fixed frequency, establishing and recording a magnetic field value in a staticstate to record as an initial magnetic field value, and capturing the time when magnetic field starts to change and recording the time as the initial change time; an ultrasonic positioning device forcarrying out positioning judgment according to the fixed frequency, determining and providing the information whether there is a vehicle on the current parking space to correct the parking space output state information; and a doppler radar detection device for activating a doppler radar detection device when the magnetic field change is detected. The magnetic field detection device and the doppler radar detection device jointly complete data recording, and the parking space occupation information is finally given by combining the positioning judgment of the ultrasonic positioning device. According to the vehicle detection sensor, the doppler radar detection device and the ultrasonic positioning device overcome the defects of a magnetic field detection device in dynamic detection and static monitoring respectively.

The invention discloses an audio control circuit for a TD-SCDMA/GSM double-mode handset, which comprises a GSM module, a TD-SCDMA module, a two-channel analog switch and a microphone. The microphone is connected with the two-channel analog switch, the two-channel analog switch is respectively connected with the microphone receiving terminals of the GSM module and the TD-SCDMA module; of the GSM module and the TD-SCDMA module, one is a main control module and the other is a controlled module; the switching control terminal of the two-channel analog switch is connected with the signal terminal of the main control module, the switching control terminal is used for controlling the two-channel analog switch to choose to switch the GSM module or the TD-SCDMA module on ; when the main control module carries out the voice communication, the signal terminal sends a low-level signal; when the controlled module carries out the voice communication, the signal terminal sends a high-level signal.

Nowadays the urban traffic jam and blocking phenomena become more and more serious, the electromagnetic environment around the urban traffic roads is complex, and electromagnetic interference sources, radio-frequency signals and aerial conductors exist on the roads, furthermore, electric equipment have the interference source, so that the magnetic signal detection on traffic roads becomes a task with significant meaning and full of challenge. The method is proposed based on a classic electromagnetic theory and the PCB (Printed Circuit Board) engineering experiment experience and aims at the wireless sensor network technology of traffic flow monitoring nodes and characteristics of magnetic resistance sensors, so that the electromagnetic compatibility (EMC) design on specific traffic flow monitoring node devices is proposed; therefore, the electromagnetic compatibility and the electromagnetic resistance of the device are improved, and the device can work stably and reliably under a complex electromagnetic environment of the roads.

The invention discloses a mobile distance measuring device and a distance measuring method thereof, and a land area measuring method. The mobile distance measuring device includes a mobile carrier, adual-camera shooting distance measuring module, a curved optical disc angle reading module, an included angle measuring module and a processing module. By means of dual-camera image distance measuringand the curved optical disc angle reading module, the resolution per angle is increased, and the distance measuring accuracy can be greatly improved. The invention also discloses an image profile comparison technology which can employ image processing to achieve the aim of automatic image distance measuring, and the problem that an existing ultrasonic distance measuring method or an existing optical distance measuring method or the like can be disturbed easily is solved.

The invention discloses an integrated type battery electric vehicle drive controller and a control method. A low-voltage input port of a low-voltage connector is connected with a main control panel, the main control panel is connected with a gate drive module, and the gate drive module is connected with an IGBT module; and a high-voltage input port of a high-voltage connector is connected with a capacitor bank, the capacitor bank is connected with the IGBT module, the IGBT module is connected with a current sensor, and the current sensor is connected with a high-voltage output port of the high-voltage connector. The functions of a vehicle control unit and a motor controller are integrated, so that vehicle drive control calculation is centralized in the main control panel, a response is made quickly, efficiency is improved, due to the fact that information does not need to be transmitted between the vehicle control unit and the motor controller through a CAN bus, no external interference condition exists, and safety is guaranteed. Only one main control panel is used, circuit boards such as a main control chip and a peripheral circuit of the vehicle control unit are all omitted, andthe cost of a whole vehicle is greatly reduced.

The invention relates to a multiple-motor driving system for an electric automobile and a control method of the multiple-motor driving system. The multiple-motor driving system comprises only one control unit, a communication unit, at least two driving units, motors and a signal transducer which is used for collecting the running state of the motors, wherein the control unit is connected with the driving units through the communication unit; the driving units and the motors are in one-to-one correspondence and connection; an output terminal of the signal transducer is connected with the control unit. The control method comprises the following steps that the control unit receives operating instructions from a driver of the electric automobile and then sends out a control signal which is transmitted to the driving units through the communication unit, the driving units drive the motors to operate, and the signal transducer collects the running state of the motors in real-time and transmits information back to the control unit, so that the real-time monitoring of the motors is realized. According to the multiple-motor driving system and the control method thereof disclosed by the invention, one control unit can control a plurality of motors, so that the controlled run of the motors in serial shaft type connection and the controlled run of a plurality of separate wheel driving motors in the electric automobile are convenient to realize, the volume is reduced, the arrangement is flexible, and the cost is reduced.

The invention relates to the field of an electrical technology and discloses a method for establishing electrical connection. The invention also provides an electrical connector. According to the method, the popo pin connector is used for realizing the establishment of rapid and reliable electric connection between a mobile terminal and multiple external devices, thus the problem that signals are easily affected due to overlong connecting leads between the devices is avoided, the delay time of high-speed signal transmission is reduced, the handheld operation inconvenience caused by cable connecting devices is eliminated, and functions of plug-and-play and hot plug are realized.

The invention relates to a constant current controller. The constant current controller is used for generating a control signal for controlling a peripheral circuit which comprises an inductor to generate a constant current signal; the constant current controller is integrated with a power tube and a power supply circuit; when standard timing is jointly generated according to an over voltage protection signal supplied by an over voltage protection pin and a reference voltage supplied by a floating voltage source, the power tube detects inductor demagnetizing time; and when the inductor demagnetizing time is less than the standard timing, over voltage protection is triggered. The invention also relates to a constant current circuit comprising the constant current controller. By virtue of the constant current circuit and the constant current controller, the standard timing in a chip is not influenced by a reuse pin any more, so that high-precision and programmable output over voltage protection can be realized consequently.

The invention discloses an anti-interference processing method for underwater mobile communication. The anti-interference processing method comprises the steps of receiving signal by using a nested array which is composed of two adjacent uniform linear arrays formed by N sonars; sampling underwater acoustic signals by using the nested array so as to acquire array output signals; calculating a virtual array received data vector according to the array output signals; carrying out sparse reconstruction on the received signals by using a convex optimization algorithm according to a compressed sensing principle so as to construct a super-complete base; solving a sparse constraint equation by using a convex optimization method so as to acquire an estimated value; acquiring an estimated value of an interference DOA according to the estimated value, constructing an interference subspace matrix and an orthogonal space projection matrix thereof, and completing interference suppression for original received signals before vectorization by using a method of orthogonal projection. The method disclosed by the invention can improve the communication efficiency and save the communication cost, and has wide application values.

The invention provides a manufacturing method of a floating gate type flash memory. The method comprises the steps: providing a semiconductor substrate, wherein the semiconductor substrate comprises asource electrode forming region and a drain electrode forming region which are separated by control grid lines; performing shallow doping ion implantation on the semiconductor substrate of the drainelectrode forming region, and then performing source electrode self-alignment etching to remove field oxygen in field oxygen isolation between adjacent control grid lines; and perform thermal oxidation treatment on the semiconductor substrate. The movement of ions injected by shallow doping is intensified in the thermal oxidation treatment process, the distribution uniformity of the ions in the drain electrode forming region is improved, and the current distribution of the drain electrode of the floating gate type flash memory can be more uniform so that the current distribution of different bit lines is converged, the distribution of the threshold voltage is also converged, and the threshold voltage is not liable to be interfered when the floating gate type flash memory is written, thereby improving the anti-interference capability of the floating gate type flash memory writing.

The invention discloses an optical fiber isolated dry contact output circuit device, and belongs to the technical field of a converter. The optical fiber isolated dry contact output circuit device comprises an optical fiber receiving circuit, a shaping and inverting circuit, a triode amplification output circuit, a relay control circuit and a signal lamp indicating circuit. The optical fiber receiving circuit is connected with the shaping and inverting circuit. The shaping and inverting circuit is connected with the triode amplification output circuit. The triode amplification output circuit is connected with the relay control circuit and the signal lamp indicating circuit, and provides a DC channel when a triode is conducted. The relay control circuit and the signal lamp indicating circuit are connected through DC voltage of +5V. The invention is advantageous in that the problem that the signal is susceptible to interference is solved, and the signal can be transmitted through a great distance. Quick response can be made, and the purposes of photoelectric isolation and the weak current control of a high current by using a relay can be achieved.

The invention provides a vehicle access method of a stereo garage, the method takes an Internet of Things gateway as an execution carrier, and comprises the following steps: S101, the Internet of Things gateway receives an instruction and identifies the type of the instruction; s102, if the instruction is vehicle taking, the position of the vehicle is obtained, an optimal vehicle taking path is obtained through a breadth-first search algorithm and the score of the vehicle taking path, and the optimal vehicle taking path is forwarded to an automatic control mechanism; s103, an empty parking space corresponding to the vehicle is acquired, an optimal moving path of the empty parking space moving to the access port of the stereo garage and an optimal parking path of the vehicle in the stereo garage from the access port of the stereo garage are calculated through a breadth-first algorithm, and the operation cost corresponding to the optimal moving path and the optimal parking path is acquired; and the optimal moving path and the optimal parking path with the minimum operation cost are sent to an automatic control mechanism. According to the invention, vehicle access is realized through edge computing of the Internet of Things gateway, the computing complexity of vehicle access is reduced, and the timeliness, economy and reliability of vehicle access scheduling are ensured.

An audio input switching-over circuit of TD-SCDMA double-mode mobile phone is prepared as connecting microphone with switch module being separately connected to microphone receiving ends of GSM module and TD-SCDMA module, setting one of GSM module and TD-SCDMA module to be master controlling module and another to be controlled module, connecting switching-over control end of switch module to signal end of master controlling module, using said switching-over controlling end to connect through module selectively and using signal end to indicate operation state of module.

A wireless remote (or ultra-remote) synchronous audio-video transmission and wireless remote (or ultra-remote) digital instruction visual control system for transmitting and controlling the digitalized sound and image in wireless mobile mode features use of the existing public networks GSM, CDMA and ADSL and their combination, the radio carrier for wireless manipulating, the advanced chips and the hardware compression encode technique (200:1) and the upgraded function of mobile telephone.

The invention provides a parameter monitoring system and method for a rotating part. The system comprises a rotor assembly and a stator assembly. The rotor assembly is connected with a sensor arranged on a to-be-tested rotating part, and the rotor assembly and the to-be-tested rotating part rotate synchronously; the rotor assembly is also connected with the stator assembly; the rotor assembly is used for receiving detection signals sensed by the sensors, performing signal processing on the detection signals to obtain a first processing result, and sending the first processing result to the stator assembly through space optical communication; and the stator assembly is used for encoding the first processing result to obtain a second processing result, and sending the second processing result to the monitoring equipment, so that the monitoring equipment monitors parameters of the to-be-tested rotating part. Real-time online monitoring of parameters such as temperature and strain of the to-be-tested rotating part is achieved, transmission is achieved through space optical communication, interference is not likely to happen, the accuracy of parameter detection results is effectively improved, and the problem that in the prior art, wireless radio frequency is likely to be interfered is solved.

The invention discloses a signal transmission processing method, a signal transmission processing device and a signal transmission processing circuit. The method comprises the steps that a first module sends a target signal to a first level conversion module; the target signal is converted into a differential signal through the first level conversion module; the differential signal is transmittedto a second level conversion module, and the second level conversion module is used for converting the differential signal into a target signal; and the target signal converted by the second level conversion module is sent to the second module. Through the method and the device, the problem that signals are easily interfered in the transmission process when common-mode signals of TTL (transistor-transistor logic) level are adopted for signal transmission in IIC (inter-integrated circuit) communication in the prior art is solved.

The invention provides a method and a device for double-precision SOC (state of charge) test of an electric vehicle power battery. The method includes: two current hall devices which are different in variation are serially connected and then serially connected with a power battery module and a comprehensive load module to form a loop; and the two current hall devices transmit signals by means of voltage or current respectively, and the outputted signals are subjected to information processing and then transmitted to a battery management module, so that the problem of inaccurate single current hall test caused by wide current variation range of the power battery is solved. The test range can be 1A-1000A, and sampling accuracy can be guaranteed within the test range. In addition, the problem that signals are easy to be interfered is fundamentally solved by transmitting signals by means of CAN communication instead of analog signals (voltage or current).