81 results about "Seven-segment display" patented technology

The invention discloses a digital meter recognition system and method based on vision. The system comprises a digital meter, a vidicon for collecting dial plate images of the digital meter and a PC for image digital recognition. The vidicon is connected with the PC through a USB interface or an image collecting card. The vidicon collects digital meter images and uploads the digital meter images to the PC. The PC carries out image preprocessing, image character segmentation and character tilt correction on source images in sequence, and finally a BP neural network template is used for character recognition. In the character recognition, according to the structure features of seven sections of digitrons, seven-feature scanning is carried out, and high recognition rate can be achieved through small calculated amount; the character images are subjected to character tilt correction, extracted recognized features are matched with the template, and the accuracy of character recognition is improved; and the recognition method based on a BP neural network with an on-line training function is used, the stability of a recognition algorithm is enhanced, and robustness is improved.

A target detecting and tracking system using a background differencing method based on FPGA comprises a FPGA device, a SD card, an LED indicator light, a DDR2SDRAM, two seven-segment digital tubes, an LTM display screen and a minimum video detecting and tracking system, wherein the minimum video detecting and tracking system is embedded in the FPGA and is integrated in a SOPCbuilder environment with an AVLON bus as a standard. The target detecting and tracking system using the background differencing method based on FPGA is mainly used for detecting and tracking moving objects in static scenes. A target detecting and tracking method using the background differencing method based on FPGA comprises the steps of a. reading AVI format video files with the SD card, b. converting the AVI format video files into multiframe images, c. detecting and tracking the videos based on the images, d. obtaining the moving objects which are to be tracked, and e. displaying tracking results on the LTM display screen. Due to the fact that an FPGA platform is adopted by the system, the system is high in parallelism performance, and computing speed is improved. The target detecting and tracking method is good in tracking effect and adaptability, particle filter algorithm which is suitable for non-linear non-Gaussian dynamic models, and the target detecting and tracking system is similar with real scenes and is good in adaptability and high in tracking accuracy.

The connection topology of input terminals 2, elements 4a, 4b, 4c and 4d and load 5 is designed similarly to a so-called “seven-segment display”, which is often used to display numerals on an electronic calculator or a digital watch. More specifically, suppose in the three horizontally running segments, the top and bottom segments are associated with the input terminals 2 and the load 5 is allocated to one of the four vertically running segments. Then, the three other vertical segments and the other horizontal segment are associated with the elements 4a, 4b, 4c and 4d, which are an inductor with an inductance of 5.119 nH, a capacitor with a capacitance of 1.370 pF, an inductor with an inductance of 8.360 nH and a capacitor with a capacitance of 5.942 pF, respectively. By adopting this circuit configuration, the total number of elements can be reduced to four and the loss can be reduced significantly. In addition, since the resonant circuits can be eliminated and the size of the ladder circuit can be reduced, impedance matching is achieved with a high degree of stability.

A light guiding device (1) and in particular to a light guiding device that can be used for illumination, backlighting, signage or display purposes is described. The light guiding device (1) comprises a transparent base substrate (2), upon a first surface of which are mounted light sources (3), and a guide substrate (4) arranged so as to encapsulate the light sources (3) upon the first surface. In this way the guide substrate (4) provides a means for guiding light produced by the one or more light sources over the first surface. The incorporation of scattering structures (5) along with appropriate choice of the refractive indices of the various layers provides a highly flexible light guiding device that is typically less than 1 mm thick. The described light guiding device (1) provides particular application as a seven segment display.

The invention discloses a double control safety box unlocked by a key and inputting a password. An unlocking key is provided with a keying circuit; a conductive marble and a mechanical marble corresponding to a conductive contact and a mechanical contact of the unlocking key are arranged in a lock cylinder; a singlechip chip and a memory are arranged in the safety box; the output end of a trigger detection circuit connected with the input end of the singlechip chip is respectively connected with an unlocking electromagnet assembly and a nixie tube display; the memory stores storage the password corresponding to an unlocking key output password and an IC card emergency key password; and the keying circuit of the unlocking key is connected with the trigger detection circuit at the input end of the singlechip chip to form an unlocking key input signal circuit. The double control safety box remains a conventional unlocking form of an electronic safety box, cancels the emergency lock cylinder which has high failure rate and high potential safety hazard, substitutes a key button and a seven-segment nixie tube display for an operating button and a liquid crystal display screen, renovates the design thought of a safety box lockset, reduces the production cost of the overall safety box, and improves a safety factor of the electronic safety box.

An electronic measuring wheel has a casing, a distance wheel and an operating shaft. The casing has a power supply, a seven-segment display and a sensor. The seven-segment display is mounted in the casing and is electrically connected to the power supply. The sensor is mounted on the seven-segment display in the casing and is electrically connected to the power supply and the seven-segment display. The distance wheel is rotatably connected to the casing and has a distance wheel axle and an induction ring. The distance wheel axle has an inner end mounted in the casing. The induction ring is mounted around the inner end of the distance wheel axle near the sensor. The operating shaft is connected to the casing.

An electronic measuring wheel has a casing, a distance wheel and an operating shaft. The casing has a power supply, a seven-segment display and a sensor. The seven-segment display is mounted in the casing and is electrically connected to the power supply. The sensor is mounted on the seven-segment display in the casing and is electrically connected to the power supply and the seven-segment display. The distance wheel is rotatably connected to the casing and has a distance wheel axle and an induction ring. The distance wheel axle has an inner end mounted in the casing. The induction ring is mounted around the inner end of the distance wheel axle near the sensor. The operating shaft is connected to the casing

The invention relates to a mainboard diagnosis card for displaying real-time power supply states of a plurality of power supply modules on the mainboard. The mainboard diagnosis card comprises a display unit and a programmable logic chip electrically connected with the display unit, wherein the display unit is used for displaying the real-time power supply states of the power supply modules, and comprises at least one seven-segment digital tube. The programmable logic chip can obtain effective communication data of the real-time power supply states of the power supply modules, and can drive at least one seven-segment digital tube to display the real-time power supply states of the power supply modules according to the effective communication data. The real-time power supply states of the power supply modules comprise a normal work state of the power supply modules or a fault state of some power supply module of the power supply modules. The invention also provides a mainboard monitoring system with the mainboard diagnosis card.

The invention relates to a BIOS (basic input output system) debugger and a BIOS debugging method. The BIOS debugging method comprises a single chip microcomputer, an FPGA (field programmable gate array) chip, an RAM (random access memory) and two seven-segment digital tubes, wherein the FPGA chip is connected with the single chip microcomputer, the RAM and the two seven-segment digital tubes. BIOS burning data signals in a series transmission format output by a control computer is converted into the BIOS burning data signals in a parallel transmission format to be output to the FPGA chip by the single chip microcomputer. The BIOS burning data signals in the parallel transmission format is stored into the RAM by the FPGA chip, the BIOS burning data signals read in RAM 30 are converted into data signals in an SPI (serial peripheral interface) communication protocol format and then are output to a computer to be tested, so that the POST (power on self test) of the computer to be tested is conducted. The POST data signals output by the computer to be tested are also converted into two-digit hexadecimal data to be output to the two seven-segment digital tubes for displaying.

The invention provides a method of realizing hardware status indication. The structure comprises a complex programmable logic device (CPLD) and a seven-segment nixie tube, wherein one end of the CPLD is connected with status indication signals on a mainboard, the CPLD finishes collecting the induction signals on the mainboard and classify and settle the collected signals, coherent signals are encoded according to priority levels and sequential relationships, and the seven-segment nixie tube is used for receiving correlative coding and display the correlative coding. Compared with the prior art, the method of realizing the hardware status indication reduces overheads of status indication circuits in circuit designs, reduces overheads of layouts and routing resources in hardware designs, and reduces device cost at the same time.

This invention relates to a kind of insulator high-tension current detector of electromagnetic induction. This detector includes support insulator (1), exploring coil (2) and signal detecting circuit(3). The exploring coil built in interior of support insulator, after connect connecting terminal of support insulator's lower end, and join to signal detection circuit by signal cable. Input end of signal multiplication circuit (4) in signal detection circuit connect with connecting terminal of support insulator lower end. Output port of signal multiplication circuit connects with input end of signal identification circuit (5). Electric current indicating circuit (6) connects with output port of signal identification circuit (5). electric current indicating circuit(6) by single-chip microcomputer chip to control blazing of seven segment nixie tube to complete detecting of high tension bus bar electric current.

Provided is a double-face LED display screen of a multi-way responder. LED nixie tubes are arranged in the middle of the display screen, a circle of first indication lamps are most close to the LED nixie tubes, a circle of second indication lamps are arranged on the periphery of the first indication lamps, the height of the display screen is 370mm, the width of the display screen is 500mm, the appearances and the structures of the front face and the back face of the display screen are identical, and synchronous display on the two faces is achieved. Each LED nixie tube is a common-cathode red seven-segment nixie tube, the height of each LED nixie tube is 240mm, the width of each LED nixie tube is 120mm, and the displayed number range is 0-12. The first indication lamps are formed by connecting red LEDs in series, and the second indication lamps are flowing-water lamps formed by red LEDs, green LEDs, blue LEDs and white LEDs. The LED display screen is large in size, high in LED brightness and capable of synchronously displaying numbers on double faces, the LED display screen is provided with the colored LED flowing water lamps, the problems that an original LED display screen is not ideal in display effect and is limited in arranging position, and the function of rendering the game atmosphere is also achieved.

The invention relates to an intelligent identification lift. The intelligent identification lift comprises a programmable logic controller (PLC), a button circuit, a coder, a floor sensor, a light emitting diode memory lamp circuit, a pulse-width modulation (PWM) control speed regulation circuit, a lift car door opening-closing circuit and a seven-segment digital tube floor display circuit. The intelligent identification lift further comprises a face recognition device, wherein the button circuit is connected with the face recognition device through the coder, the face recognition device and the floor sensor are respectively connected with an input end of the PLC, and an output end of the PLC is connected with the lift car door opening-closing circuit, the light emitting diode memory lamp circuit, the PWM control speed regulation circuit and the seven-segment digital tube floor display circuit. The intelligent identification lift can automatically identifies that no one waits outside a floor, even though someone presses a button, the lift does not stop at the floor, and thus intelligent identification lift effectively saves the operating time of the lift, and is energy-saving and time-saving.

The connection topology of input terminals 2, elements 4a, 4b, 4c and 4d and load 5 is designed similarly to a so-called “seven-segment display”, which is often used to display numerals on an electronic calculator or a digital watch. More specifically, suppose in the three horizontally running segments, the top and bottom segments are associated with the input terminals 2 and the load 5 is allocated to one of the four vertically running segments. Then, the three other vertical segments and the other horizontal segment are associated with the elements 4a, 4b, 4c and 4d, which are a capacitor with a capacitance of 0.573 pF, an inductor with an inductance of 5.013 nH, a capacitor with a capacitance of 0.692 pF, and an inductor with an inductance of 2.543 nH, respectively. By adopting this circuit configuration, the total number of elements can be reduced to four and the loss can be reduced significantly. In addition, since the resonant circuits can be eliminated and the size of the ladder circuit can be reduced, impedance matching is achieved with a high degree of stability.