57results about How to "The peripheral circuit is simple" patented technology

The invention relates to an embedded controller adopting an ARM microcontroller and a uC/OS-II embedded real-time operating system. The embedded controller is used for controlling an ultrasonic motor. The embedded controller is characterized in that a touch screen and a keyboard are connected with the touch screen interface and the keyboard interface of the ARM microcontroller, the output of the ARM microcontroller is connected with the input ends of a wave generator circuit and a voltage control circuit, the outputs of the wave generator circuit and the voltage control circuit are connected with a power voltage amplifying circuit, the output of the power voltage amplifying circuit is connected with the ultrasonic motor M1, a photoelectric encoder M2 and the ultrasonic motor M1 are coaxially arranged, and the output end of the photoelectric encoder M2 is connected with the input end of the ARM microcontroller. The invention solves the problems existing in the switching power supply technology that hardware parts are more complicated, a special chip and a peripheral circuit are required, and the power consumption is larger as well as the defects existing in the process that a sine wave signal is directly amplified and input into the ultrasonic motor that the cost is high, the performance-price ratio is bad, and the like. The invention has the advantages that the peripheral circuit is simple, the cost is low, the speed and position control of the ultrasonic motor is realized through the humanized human-computer interaction, and the running state and the running curve of the motor are displayed on a liquid crystal display in real time.

The invention relates to a current detection circuit and a switch-type regulator provided with the same. The current detection circuit comprises a feedback signal generation circuit and a feedback control circuit, wherein according to a received output signal of the feedback control circuit, rising time of the inductive current and declining time of the inductive current in the switch-type regulator, the feedback signal generation circuit generates a feedback signal which is in a direct proportion relation with the output signal. The feedback control circuit receives the feedback signal and a reference signal and controls the feedback signal and the reference signal to be kept consistent so as to ensure that the output signal of the feedback control circuit can represent current information to be detected.

The invention relates to a wireless terminal and a multi-SIM (subscriber identity module) card connecting device thereof. The multi-SIM card connecting device comprises a SIM card selecting module, four SIM card interface modules, a baseband interface module and a control module, wherein the SIM card selecting module is used for receiving the SIM card selection information of a baseband chip and generating the SIM card resetting information, data information, power supply information and clock information corresponding to the received SIM card selection information; the four SIM card interface modules are used for transmitting the interaction information of the baseband chip and the SIM card; the baseband interface module is used for transmitting the interaction information of the baseband chip and the SIM card and transmitting the resetting information, the data information and the clock information between the SIM card interface modules after being connected with the SIM card interface modules; and the control module is used for acquiring the selected SIM card interface module information from the received information and connecting the baseband interface module to the selected SIM card interface module. The device has the advantages that the four-card four-waiting function is realized while the peripheral circuit is simple, the function is conveniently realized and the costis low.

The invention discloses a spectral data acquisition and transmission system and operating and application methods thereof and belongs to the technical field of spectrum analyzers. The system comprises a master control module, a sensing module, a signal conditioning module, a transmission module, and a power supply module. The master control module is used for driving the sensing module to convert analog voltage signals that the signal conditioning module outputs, into spectral data output to the transmission module. The sensing module is driven by the master control module to photoelectrically convert spectral signals that are focused on the sensing module, to obtain analog voltage signals of pixels, and sequentially outputting the signals to the signal conditioning module. The signal conditioning module is used for converting the voltage of the analog voltage signals which the sensing module outputs, and outputting the signals to the master control module. The transmission module is used for transmitting the spectral data which the master control module outputs, to an upper computer. The power supply module powers the system. The spectral data acquisition and transmission system is compact in structure and applicable to miniature spectrographs. The spectral data acquisition and transmission system has the flexible data transmission mode; through the system, a distributed multi-point spectral data acquisition network can be achieved by Bluetooth networking.

The invention provides an anti-interference LED overvoltage protection module and an anti-interference LED overvoltage protection system. The anti-interference LED overvoltage protection module comprises elements such as a voltage-regulator tube. An overvoltage protection setting resistor, a minimum demagnetization time capacitor and a minimum demagnetization time comparator set a minimum demagnetization time. When the circuit demagnetization time detected by a demagnetization detection unit is smaller than the minimum demagnetization time, an overvoltage protection unit detects output voltage is overvoltage. Through the overvoltage protection setting resistor pulled up to the voltage-regulator tube, setting of the minimum demagnetization time is realized, an anti-interference overvoltage protection function is thus realized, and the technical problems the traditional overvoltage protection mode is high in cost, complicated in a peripheral circuit or likely to interfere can be overcome.

The invention discloses a PFM constant-current control circuit applied in AC-DC converters, which mainly solves the problem that: since constant current in the prior art needs a photocoupler and a secondary loop control circuit, the application circuit is complex, and the cost is high. The PFM constant-current control circuit comprises a first voltage/current conversion circuit, a voltage sampling and retaining circuit, a second voltage/current conversion circuit, a first current subtraction circuit and a second current subtraction circuit. The voltage sampling and retaining circuit samples the change of output voltage by means of the feedback of a resistor voltage-dividing end of an auxiliary winding of a flyback converter, the voltage/current conversion circuits and the current subtraction circuits are utilized to convert the sampled voltage change of the resistor voltage-dividing end into current change, the current, the output magnitude of which is in direct proportion to the frequency of an oscillator, is used as the working current of the oscillator of an AC-DC converter, and when the load is changed, the magnitude of input power is regulated in order to realize constant current. The PFM constant-current control circuit can simplify application circuits and reduce the system cost, and can be used in the designs of constant-current constant-voltage AC-DC converters.

The invention discloses a pixel device, a driving method used for the pixel device, and a display device. The pixel device comprises a light emitting device, a light emitting control unit, a storage unit, and a driving unit. The light emitting control unit is configured to control whether the light emitting device gives out light responded to a light emitting control signal. The storage unit is configured to store threshold voltage information and write in data signals. The driving unit comprises a first transistor used to drive the light emitting device. The driving unit is coupled with the light emitting control unit and the storage unit, and is configured to extract threshold voltage information, and stores the threshold voltage information in the storage unit. The driving unit drives the light emitting device based on the stored threshold voltage information and the written in data signal. The threshold voltage information includes threshold voltage information of the first transistor. The pixel device can compensate threshold voltage drift of a drive transistor and the light emitting device.

The invention discloses a DSP (digital signal processor)-based stepper motor control system. The DSP-based stepper motor control system comprises a DSP control module, a power supply module, a motor driving module, a current detection module, a speed measurement module, a touch screen display module, an alarming module and a two-phase four-wire-system stepper motor. The DSP control module is used ,as a control center, to mainly generate the forth PWM signals and control the rotation speed and rotation direction of the stepper motor; the current detection module is used for detecting current flowing by a motor driving chip, the speed measurement module is used for detecting the rotation speed and rotation direction of the stepper motor and displaying the detected rotation speed and rotation direction of the stepper motor by virtue of touch screen, and a touch key is set by virtue of the touch screen module; the acoustic-optical alarming module is mainly used for receiving a signal from the DSP and issuing an alarm when the current flowing by the motor driving chip and detected by the current detection module exceeds a rated range. By adopting the system, the peripheral circuit is simplified, so that the stepper motor is high in response speed, high in precision, small in output torque pulse, more accurate in speed measurement; moreover, the expandability of the system is greatly improved.

The invention discloses a diesel engine digital regulation and control device and a regulation and control method achieved through the diesel engine digital regulation and control device. The device comprises a speed regulating drive main circuit, a shaping circuit, a core processor and an input and output device. The core processor is used for segmented PID control. Input signals of the shaping circuit are revolution speed transducer signals, and output signals of the shaping circuit are square wave revolution speed signals. The output end of the shaping circuit is connected with an external interruption pin of the core processor, and an I/O port of the core processor is connected with the input and output device. Signals output by a PWM output pin of the core processor are connected to the speed regulating drive main circuit, and a speed regulating output terminal TS of the speed regulating drive main circuit outputs voltage for regulating a diesel engine accelerator. The device has the advantages of being compact in structure, low in power consumption, high in accuracy, good in speed control performance, high in safety and convenient to use.

The invention discloses a charge and discharge drive protection system for a lithium battery. The charge and discharge drive protection system for the lithium battery comprises a chip synthesized by apower supply module, a program control module and a battery charge and discharge management module, wherein the program control module is connected with a charge and discharge current detection module, a short circuit detection module, a battery temperature monitoring module, a charge and discharge drive module and a plurality of external interfaces; and the battery charge and discharge management module is integrated with a voltage detection module and a balance module for balancing the quantity of stored electricity in each cell. The charge and discharge drive protection system for the lithium battery provided by the invention is an integrated chip system which is simple in peripheral circuit, perfect in protection function and low in power consumption, the reliability is improved, thefunction is strengthened, the system is of programmable control, the confidentiality is strengthened, and the cost is reduced.

The invention relates to a motion controller and a control method in a technical field of numerical control, particularly to a multi-shaft motion controller based on a dual-core controller and a control method of a closed-loop PWM pulse. The motion controller comprises a main processor core, an upper computer, and a servo driver; the upper computer and the main processor core are connected by a serial bus; and motion instruction data are transmitted to the main processor core. In addition, the invention also includes a co-processor core, an integrated multi-channel PWM controller, and a shared memory; and the PWM controller and the co-processor core complete position tracking jointly. The shared memory, the main processor core, the PWM controller, and the co-processor core are connected successively to form a closed loop. The controller and the control method have the following beneficial effects: firstly, with a single-path multi-core DSP, a problem of consistency of shared data between processor cores can be solved and the processing efficiency is improved; secondly, the closed-loop PWM pulse control method is applied to motion control; and thirdly, the provided technique is easy to extend and apply.

The invention discloses a buck-boost control circuit of an LED (Light Emitting Diode) lamp, which has the outstanding advantages of wide output voltage range, good constant current characteristic, high efficiency, small size, simple circuit, low cost, high reliability and so on; the control circuit comprises a direct current power supply, an LED, a pulse width modulating circuit, a switching tube, an inductance coil with a magnetic core, an auxiliary coil and an output diode, wherein a control electrode of the switching tube is connected with the pulse width modulating circuit; an output electrode of the switching tube is connected with a current sampling resistor; an input electrode of the switching tube is connected to a direct current power supply by the inductance coil; an anode of the output diode is connected with one end of the inductance coil; a cathode of the inductance coil is connected with an anode of the LED; a cathode of the LED is connected with the other end of the inductance coil; the auxiliary coil is connected with a voltage feedback end FB of the pulse width modulating circuit; and a CS of the pulse width modulating circuit is connected with the current sampling resistor; a starting end Vin of the pulse width modulating circuit is connected with the direct current power supply by a resistor.

The embodiment of the invention provides a power battery system. First switches K1 and second switches K2 are driven to be turned on after the second contact of a magnetic latching relay is sucked down, a first contact is disconnected at the sucking down moment of the second contact, corresponding third switches K3 are turned off, the positive electrodes of all first single batteries S1 are connected through the corresponding first switches K1, the negative electrodes of all first single batteries S1 are connected through a corresponding second switch K2, and the first single batteries S1 areconnected in parallel; and after the first contact is sucked down to drive the third switches K3 to be turned on, the second contact is disconnected at the sucking down moment of the first contact, the first switches K1 and the second switches K2 are also turned off, and the first single batteries S1 are connected in series via the third switches K3. The power battery system utilizes the characteristic that the multiple contacts are simultaneously opened or closed when the magnetic latching relay is turned over, so the system has the advantages of shortening the series and parallel connectionswitching time between the single batteries, low energy consumption, high efficiency and good stability.

The invention relates to a power MOS pipe switch power supply integration power supply circuit without an auxiliary winding. The circuit comprises a high voltage rectification filter circuit module, a transformer and an integrated circuit module. An output terminal of the high voltage rectification filter circuit module is connected to a synonym terminal of a primary winding of the transformer. The integrated circuit module is connected to a dotted terminal of the primary winding of the transformer. By using the power MOS pipe switch power supply integration power supply circuit without the auxiliary winding, one winding of the transformer is omitted, a peripheral circuit is greatly simplified, production cost is reduced and a wide application scope is possessed.

The invention discloses a circuit, and particularly discloses a load voltage compensation circuit for light-emitting diode (LED) driving. The load voltage compensation circuit comprises a load voltage detection module, a sampling hold module, a load voltage compensation module, a current detection module, a degaussing detection module, a control drive module, a transformer, a switch tube, a sampling resistor and a divider resistor, wherein the load voltage detection module, the sampling hold module and the load voltage compensation module are sequentially connected with one another in series; an output end of the load voltage compensation module is connected with the control drive module; a feedback detection end is also led out from the middle of the divider resistor by the circuit, and is simultaneously connected with input ends of the load voltage detection module and the degaussing detection module; the output ends of the degaussing detection module and the current detection module are both connected with the control drive module; the control drive module is connected with the switch tube; the switch tube is connected with the transformer through the sampling resistor; and the transformer is connected with the divider resistor in parallel. The accuracy of output current of the load voltage compensation circuit is high; an auxiliary winding of the transformer is not needed; a peripheral circuit is simplified; and the cost is reduced.

The invention discloses a self-adjustment solar street lamp controller, and the controller comprises an LED light-emitting module, an LED drive circuit, a storage battery pack, a solar cell, a DC-AC step-up circuit, a DC-DC step-down circuit, a Zigbee module, and a control module. The control module comprises a single-chip microcomputer, and the single-chip microcomputer is used for communication and data transmission with the Zigbee module. The single-chip microcomputer is connected with a charging end of the storage battery pack, and is used for controlling the on/off of charging, solving the integration of a charging current, and obtaining a charging quantity serving as a correcting factor. The single-chip microcomputer collects the voltage and temperature of a battery of the storage battery pack, and is used for monitoring the battery in real time, and protecting the battery from being overcharged. The single-chip microcomputer solves the internal resistance of the battery through monitoring the open-circuit voltage of the storage battery pack, and obtains the initial electric quantity of the battery, wherein the initial electric quantity is used for calculating the remaining electric quantity. The single-chip microcomputer controls the brightness of a lamp through a PWM signal, and achieves a purpose of adaptive adjustment of brightness.

The invention discloses a rewritable multi-system programmable infrared remote control emission circuit, which comprises two power supply ports, an IR (Infrared Ray) output port, 12 keyboard input ports and a keyboard input/LED (Light Emitting Diode) output port, wherein a programming file is generated by remote control coding software and is programmed into a built-in MTP (Media Transfer Protocol) storage unit.

The invention provides a filter circuit and a filtering method thereof. The filter circuit comprises a first switch and a second switch, wherein one end of the first switch is connected with an inputsignal, the other end of the first switch is connected with an upper pole plate of a first capacitor, and a lower pole plate of the first capacitor is grounded; one end of the second switch is connected with the upper pole plate of the first capacitor, the other end of the second switch is connected with an upper pole plate of a second capacitor, and a lower pole plate of the second capacitor is grounded; and the switching signal of the first switch and the switching signal of the second switch are opposite in phase. When the first switch is turned on, an input signal charges and discharges the first capacitor, the second switch is turned off, the voltage on the second capacitor is not changed, and stable output is realized; when the first switch is turned off, the input signal is disconnected with the first capacitor, the second switch is turned on, the first capacitor charges and discharges the second capacitor, and the output signal changes along with the voltage of the second capacitor. The filter circuit is simple in structure and higher in integration level, the configuration of a large filter capacitor can be omitted, a peripheral circuit is simplified, the system cost is reduced, and the failure problem caused by the peripheral filter capacitor is thoroughly eliminated.

The invention discloses a PFC module. The PFC module comprises a shell and a bridge-type rectification circuit, wherein the bridge-type rectification circuit is formed by connecting four rectificationdiodes, a power switch tube is connected in parallel with each of an upper bridge rectification diode and lower bridge rectification diodes, the lower bridge rectification diodes are connected with the upper bridge rectification diode, a sampling resistor is connected between positive electrodes of the lower bridge rectification diodes, PFC control is performed by a PFC control algorithm according to a voltage signal of an AC power supply and a current signal of a current signal sampling point, and the purpose of power factor correction is achieved. In the PFC module, the power factor correction circuit and the rectification circuit are shared, an independent PFC circuit link is omitted, the circuit loss is reduced, so that the AC-DC power conversion efficiency is obviously improved.

The invention relates to a stroboflash-free high-precision constant-current LED (light emitting diode) drive circuit and an operating method thereof. The high-precision constant-current LED drive circuit comprises an LED drive and an energy storage unit connected with the LED drive, the LED drive is internally provided with an MOS (metal oxide semiconductor) tube and a feedback signal input end, and the energy storage unit is coupled with a feedback circuit to acquire feedback signals which are inputted into the feedback signal input end. The stroboflash-free high-precision constant-current LED drive circuit has the advantages that by the aid of the LED drive internally provided with the MOS tube and the feedback signal input end, integrity of the drive circuit is improved, and the problem of LED stroboflash can be avoided only by one LED drive; a peripheral circuit of the LED drive circuit is more simplified by an internal overvoltage protector, and high reliability is achieved; the LED drive is free of hiccups and is directly locked when an output voltage is higher than an overvoltage protection reference voltage, so that the LED drive is further protected.

The invention provides an integrating circuit and an integrating method thereof. The integrating circuit comprises: an error amplifier for amplifying and outputting a difference value between a reference voltage and a feedback voltage; a first switch and a second switch which are sequentially connected to the output end of the error amplifier; a first capacitor connected between the output end ofthe error amplifier and the ground; a second capacitor connected between the output end of the first switch and the ground; a third capacitor connected between the output end of the second switch andthe ground, wherein switching signals of the first switch and the second switch are opposite in phase. The difference between the reference voltage and the feedback voltage is amplified to obtain an error voltage, the error voltage is filtered to generate a compensation voltage, the compensation voltage is processed by the control module to generate a feedback voltage, a feedback loop is formed, loop integration is further realized, and the mean value of the feedback voltage is equal to the reference voltage value. The integrating circuit is simple in structure and high in integration level, alarge filter capacitor can be omitted, a peripheral circuit is simplified, the system cost is reduced, and the failure problem caused by the peripheral filter capacitor is thoroughly eliminated.

The invention discloses an electric vehicle anti-theft monitoring method based on the Internet of Things. The method comprises the steps that: 1, anti-theft monitoring is started through a mobile terminal; 2, vibration acceleration in a period and an intrusion signal in an induction range are acquired to obtain a vibration coefficient of a vehicle; and 3, when it is determined that someone intrudes into the induction range and the vehicle vibrates, an acquisition device is started to take pictures and send the pictures to the mobile terminal, the vehicle gives an alarm, and meanwhile a circuitof the vehicle is cut off through a relay module. On the basis of combination of various sensors and the Internet of Things, early warning is performed through different modules according to dual judgment of different vehicle vibration states and intrusion signals in the induction range, and remote control and monitoring of the theft prevention of the electric vehicle are realized.