The invention discloses a linear multi-motor control system which comprises a controller, an upper computer, a laser sensor, a plurality of stepping drivers and a through type stepping motor. The controller exchanges information with an upper computer through a field bus; the laser sensor is used for carrying out zero calibration on the initial positions of the plurality of through type stepping motors; the controller reads the data of the laser sensor through analog-to-digital conversion; the controller controls the stepping drivers, each stepping driver correspondingly drives the unique through type stepping motor to move, and multi-motor linear motion control is achieved. The invention is suitable for a time-sharing control multi-motor system, the digital port requirement of control information is reduced through sharing of control signals such as pulses and directions, and the larger the number of motors is, the larger the reduced number is; through a non-contact laser sensor, inclined installation is adopted, zero calibration of multiple motors is achieved at the same time, zero sensors are reduced, the system reliability is improved, and meanwhile the installation space is saved.

Linear multi-motor control system

The invention relates to a virtual reality interaction method based on fatigue monitoring and early warning, being characterized by judging whether an operator is in a fatigue state or not according to the blinking frequency and the energy proportion of the alpha rhythm in all brain waves; in the monitoring process, as long as one of the energy ratio or the blinking frequency of the alpha rhythm in all brain waves is greater than a respective preset threshold value, reducing the sampling interval, and re-sampling the parameters which do not exceed the threshold limit; judging whether a presetthreshold value is exceeded or not, starting a flight control system to fly autonomously and give an alarm when all the parameters meet the alarm requirement, setting a first sampling interval t1 forthe sampling interval, and obtaining a blinking frequency f1 and an energy proportion A1 of the alpha rhythm in all the brain waves; if the blinking frequency f1 is smaller than or equal to a first threshold value and the energy proportion A1 of the alpha rhythm in all the brain waves is smaller than or equal to a second threshold value, executing the step S2; and closing the flight control systemand entering a manual operation mode.

Virtual reality interaction method based on fatigue monitoring and early warning

The invention relates to an eye movement signal processing method for virtual reality head-mounted display and wearable equipment, and belongs to the field of virtual reality and eye movement data analysis. The method comprises the following steps: extracting a head rotation angle and a two-dimensional fixation point coordinate of an eyeball in a visual window according to head movement data and eye movement data of a subject; mapping the two-dimensional fixation point coordinates in the visual window to a three-dimensional sphere space coordinate system according to the head rotation angle toobtain three-dimensional fixation point coordinates; processing the three-dimensional fixation point coordinates to obtain longitude and latitude fixation point coordinates under a geographic longitude and latitude coordinate system, and analyzing gaze data by adopting a method based on speed and time thresholds; and extracting eye movement features according to the gaze data. According to the invention, the eye movement signals in the virtual reality head-mounted display environment can be accurately collected, the characteristics of common eye movement are extracted, and the calculation process is simple and easy to implement.

Eye movement signal processing method for virtual reality head-mounted display and wearable equipment

The utility model provides an FSMC-based multi-stepping motor drive circuit. The FSMC-based multi-stepping motor drive circuit comprises an FSMC controller, a chip selection circuit, a decoding latchcircuit and a buffer circuit. The utility model also relates to a multi-stepping motor driving device based on the FSMC. According to the utility model, the functions of the stepping motor driver areconfigured by writing instructions to the FSMC controller, and the acceleration and deceleration curve of the stepping motor is programmed by configuring the internal storage of the FSMC controller, so that the complexity of software programming is effectively reduced; according to the utility model, the drive control of a plurality of stepping motors is realized, the occupied single-chip microcomputer resources are few, and the resource requirements of the input and output ends of the single-chip microcomputer are reduced, thereby reducing the cost. In addition, the motion state of the stepping motor is fed back through an external photoelectric switch to achieve the purpose of closed-loop control, and accurate positioning of the stepping motor is achieved.

Multi-stepping-motor driving circuit and device based on FSMC

The invention discloses a fatigue detection and wake-up promotion system based on eye movement and head movement parameter monitoring. The fatigue detection and wake-up promotion system based on eye movement and head movement parameter monitoring comprises a glasses body, an image acquisition module, a head movement data acquisition module, a wake-up promotion module, a power supply module and a post-treatment module; the head movement data acquisition module is used for acquiring head movement data of a wearer; the wake-up promotion module comprises a light stimulation unit, a sound stimulation unit and a vibration stimulation unit; and the post-treatment module comprises an eye movement data analysis module, a head movement data analysis module, a fatigue level analysis module and a maincontrol module. The fatigue detection and wake-up promotion system based on eye movement and head movement parameter monitoring disclosed by the invention is capable of automatically determining fatigue level of the human body by performing fusion assessments on eye movement data and head movement data, as well as sending out early warning according to the fatigue level of the human body; moreover, the system is capable of promoting reduction of the fatigue level of the human body by performing wake-up promotion stimulation combining sound, light and vibration, thereby enhancing human body alertness and operational ability. In addition, the system carries out data analysis by adopting a blink analysis algorithms for the human eyes based on MRCNN, thereby capable of improving accuracy andefficiency of blinking state judgment.

Fatigue detection and wake-up promotion system based on eye movement and head movement parameter monitoring

The invention discloses a wearable weariness detection and intervention system. The wearable weariness detection and intervention system comprises a dressing device body, an image collecting module for collecting the eye movement data of a wearer, an infrared lighting source, a head movement data collecting module for collecting the head movement data of the wearer, a waking promoting module and acore treatment module, wherein the waking promoting module comprises a light stimulating unit, a sound stimulation unit and a shaking stimulation unit; and the core treatment module comprises an eyemovement data analyzing module, a head movement data analyzing module, a fatigue degree analyzing module and a control module. According to the wearable weariness detection and intervention system, through integrated assessment of eye movement and head movement information, the fatigue degree of human bodies can be decided intelligently, and according to the fatigue grade of the human bodies, prewarning is performed; and waking promotion stimulation is performed in a sound, light and vibration combination manner, so that the fatigue degree of the human bodies is reduced, and the warning degreeand the operation capacity are increased. Based on a human eye blinking analyzing algorithm of plus and gradients, data analysis is performed, and the blinking state judging robustness, disturbance resistance and the efficiency can be improved.

Wearable weariness detection and intervention system

The invention discloses an infusion support with a quantitative constant-speed alarm function, which comprises an infusion support body, a tension sensor arranged on a hook of the infusion support body, a micro control unit and an acousto-optic alarm module arranged on the infusion support body, and a remote controller connected with the micro control unit in a wireless communication way. By the adoption of the infusion support with the quantitative constant-speed alarm function, quantitative constant-speed infusion can be achieved according to different requirements of different patients of different ages; meanwhile, when a set infusion amount is about to complete or the infusion speed exceeds a set range, an indicating lamp is converted from a normally-on green light into a flashing redlight, and a sound alarm is triggered, so that medical personnel can be reminded of carrying out related treatment in time; the infusion support is beneficial to reducing working burden of the medicalpersonnel, improving working efficiency of the medical personnel, creating a more comfortable medical environment for the patients, and relieving psychological burden of the patients; and the infusion support has important medical value and market value.

Infusion support with quantitative constant-speed alarm function

The invention discloses a driving fatigue monitoring system based on head attitude information and electrooculographic information, comprising a signal acquisition module, a signal processing module,a fatigue judging module and a warning module. The signal acquisition module comprises a head attitude signal acquisition module and an electrooculographic signal acquisition module; the signal processing module includes a head attitude signal processing module and an electrooculographic signal processing module. The driving fatigue monitoring system based on head attitude information and electrooculographic information makes fatigue judgment for a driver according to the head attitude information and the electrooculographic information; an algorithm used herein is simple; few parameters are used, robustness is good, and accuracy is high; when a driver is fatigue, the warning module helps awake the driver and remind the driver of having a rest; the fatigue state of the driver can be monitored in real time, so that the driver can be kept awake during working, and operating capacity can be improved; therefore, traffic accidents can be decreased.

Driving fatigue monitoring system based on head attitude information and electrooculographic information

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