61results about How to "Simple hardware circuit" patented technology

The invention provides a car audio system and a software upgrading method thereof. The memory space of an MCU of the car audio system is divided into a normal application program space, a software update control program space and an updated mark space, the software upgrading control can be directly performed in the RAM and storage space in the MCU, thus simplifying hardware circuits; a public boot program is designed so that the system can enter a software upgrading mode when the updating of application program fails, thus the software upgrading system is stable; and the car audio system of the invention has the advantages of simple upgrading process and low cost.

The invention discloses an FPGA/CPLD (Field Programmable Gate Array/Complex Programmable Logic Device)-based program downloader, which comprises a host, a transmission device and a configurable device that constitutes a hardware structure through a programming mode, wherein the transmission device is connected with the host and the configurable device that constitutes the hardware structure through the programming mode respectively, the transmission device comprises a USB (Universal Serial Bus) control module, a protocol conversion module, a buffer module and an output port, the USB control module is connected with a USB interface of the host, the protocol conversion module is connected with the USB control module, the buffer module is connected with the protocol conversion module, the protocol conversion module is connected with the output port, and the output port is connected with an input port of the configurable device that constitutes the hardware structure through the programming mode.

The invention relates to a portable type wireless ECG monitoring device of the medical treatment wardship technical field. In the invention, an electrocardiosignal preamplification module uses negative feedback differential amplifier circuits to carry out one-stage size-expansion on gathered electrocardiosignals; after being enlarged, the electrocardiosignals are transmitted to a microprocessor which comprises an operational amplifier, a flash module, an AD converter, an MAC, a heart rate identification module and a peripheral interface; a wireless transceiving module transmits exceptional electrocardiosignals to a USB transceiving module by using Zigbee protocol in a wireless way; a USB transceiving module receives the exceptional electrocardiosignals transmitted by the wireless transceiving module; and the USB transceiving module is connected with a peripheral device. The portable type wireless ECG monitoring device is characterized by small volume, lower power consumption and wireless transceiving.

A digital trigger for the main loop of three-phase full-bridge SCR power supply used for welding is composed of main circuit, trigger driver and synchronizer. Its main loop consists of synchronizer, synchronous transformer, resistors and voltage stabilizing diodes. The output voltage or current can be controlled in closed-loop mode. Its advantages are high real-time control accuracy, and high reliability, symmetricity and stability.

An intelligent reversing radar system and an automatic control method thereof relate to a radar system and a control method thereof. The system comprises at least two sensors; each sensor comprises an ultrasonic sensing unit and a control unit; each control unit comprises a single-chip microcomputer, an emitting circuit and a receiving circuit, which are connected in sequence; the single-chip microcomputer of each sensor is connected with a connector; the single-chip microcomputer of the main control sensor is connected with external equipment by an external data line; all single-chip microcomputers are connected by an internal communication line and are respectively connected with a reversing lamp signal line and a grounding line. The method comprises the steps that the system is subjected to self-inspection after all sensors realize automatic positioning; the system emits an ultrasonic wave and receives a returning signal; the signal is subjected to data processing after being amplified and is finally output to the external equipment by the main control sensor. According to the intelligent radar reversing radar system and the automatic control method thereof, a hardware circuit can be simplified, the performances are stable and reliable, the positions of the sensors can be fast and accurately identified, and the radar system can be simply and reliably controlled and is suitable for the configuration of different vehicle models.

The invention discloses a digital control system for a DC/DC converter, which aims to realize the functions of current and voltage proportion integration differentiation (PID) algorithm control, pulse-width modulation (PWM) driving control, fault diagnosis, communication with the whole vehicle and the like in the DC/DC converter of an electric vehicle. The digital control system for the DC/DC converter comprises a power conversion circuit, wherein the power conversion circuit comprises an input end, a full-bridge phase shift circuit and an output end which are sequentially connected; the full-bridge phase shift circuit consists of four field effect tubes; and sampling circuits are arranged at the input end and the output end. The key is that: the digital control system further comprises a control unit, wherein the control unit comprises a control module, and an analogue-to-digital conversion module, a pulse-width modulation module and a controller area network (CAN) gateway module which are connected with the control module; the output end of the pulse-width modulation module is connected with the control ends of the field effect tubes; and the control module receives information from the input and output ends by the analogue-to-digital conversion module and the sampling circuits, and controls the output of the pulse-width modulation module according to the information.

The invention discloses a control circuit for near field communication (NFC) and a smart card. The control circuit comprises at least one antenna, a voltage processing module, a control module, a gating switch module and a preset number of radio frequency communication modules; the antennae acquire wireless electric energy from external NFC equipment and output alternating currents to the voltageprocessing module, and the voltage processing module processes the alternating currents into direct-current power supply voltages to the control module for power supply; the control module outputs a switch control signal to the gating switch module, and the gating switch module switches on or switches off connection between the corresponding radio frequency communication modules and the corresponding antennae according to the switch control signal; and when the radio frequency communication modules and the antennae are connected, the radio frequency communication modules achieve radio frequency communication with the NFC equipment through the antennae. Accordingly, the internal power acquiring problem of the smart card is solved, a battery does not need to be additionally configured, the hardware circuit is simplified, and the smart card has multiple radio frequency communication functions, can be switched among multiple radio frequency communication modes and can be applied to multiple occasions.

The invention discloses a method for sampling high-frequency periodic signals, comprising the following steps: sampling input signals by using sampling signals, and storing data of the sampled input signals; counting frequencies of the input signals and the sampling signals so as to obtain frequency ratio of the input signals to the sampling signals; processing the data of the stored sampled input signals by using the frequency ratio of the input signals to the sampling signals so as to restore the input signals; and outputting the recovered input signals so as to display waveforms. By utilizing the method for sampling the high-frequency periodic signals provided by the invention, the high-frequency periodic signals can be effectively sampled and recovered by using low speed analog/digital, and the method is high in sampling precision and strong in controllability. The invention further discloses a system for sampling high-frequency periodic signals.

A device for generating comfort noise consists of N numbers of generators for generating Pseudo random sequence code with different polynomial and one adder with N input M bit as N being natural number which is equal to or greater than 2 and M being natural number which is equal to or greater than 10. It is featured as using output of said N numbers of generators as input of adder, adding up as per bit based on low bit justification rule as adding zero for high bit which is not up to M bit and cutting off lowest M bit if bit is greater than M bit to make adder output be comfort noise signal.

The invention discloses a living environment comfort degree control method based on fuzzy intelligent behavior simulation. The method is characterized by including the following steps: building a living environment comfort degree control device; building a comfort degree fuzzy control mathematic model; implanting a single chip computer fuzzy controller; collecting indoor environment and transmitting the indoor environment to the single chip computer fuzzy controller; carrying out fuzzy reasoning operation through the single chip computer fuzzy controller, and obtaining a fuzzy comfort control output response value; transmitting the value to a drive executor; controlling the work state of a cooler or heater. The method overcomes the difficulties that the indoor comfort degree can not be directly measured and hardware circuits are complex. A comfort degree sensor has the advantages of being scientific and effective in fuzzy judging method, simple in hardware circuit, high in responding speed and the like.

An interactive wireless control system includes a control module and an application system. The control module includes a microprocessor having an image processing unit and a plurality of connecting interfaces. The control module is applied to a remote control device having at least one image-obtaining unit so that the microprocessor uses the connecting interfaces to control the remote control device. The application system is wirelessly connected with the control module to perform wireless signal transmission. The application system receives a live image signal transmitted by the remote control device and displays the live image signal, and generates an operating control signal to the microprocessor to control the remote control device. Thereby, the functions of the interactive wireless control system can be increased.

The present invention provides a serial device control circuit, which comprises a host computer and at least a serial device. The common input bus and the common output bus of at least one serial device are communicated with the host computer; the input terminal of at least one serial device is respectively connected with the output bus and the output terminal is respectively connected with the input bus through a one-way guide circuit device. The present invention also provides a serial device control method. The serial device control circuit provided by the present invention is suitable for the control network consistent with RS232 standard serial device, thus achieving the monitoring of multi-serial-device network, simplifying the hardware circuit of the serial device control network, reducing the control cost of the serial device, which is stable, reliable and can be implemented easily.

The invention discloses a motion sensing device and a mobile terminal. The device comprises a sensing module and a processing module, wherein the sensing module comprises at least two output ends; the processing module comprises at least two signal ports, and each signal port of the processing port is respectively connected with one output end of the sensing module; the sensing module outputs sensing signals from different output ends according to sensed different motions; and the processing module carries out corresponding processing according to the sensing signals received from different signal ports. The device simplifies a hardware circuit to a certain extent, saves the cost, and reduces the consumption of electric energy. By using the device, a mobile terminal with a screen shaking function can be produced. Compared with the traditional mobile terminal with the screen shaking function, the mobile terminal simplifies the hardware circuit to a certain extent, reduces the production cost of the mobile terminal, and improves the endurance capability and the reliability of the mobile terminal.

The invention discloses a downloading device for a field-programmable gate array logical code. The device consists of a computer, a USB (universal serial bus) interface, a USB protocol converter, a crystal oscillator, a JTAG (joint test action group) downloading interface module and a system controller, wherein the USB interface is connected with the data terminal of the computer; a power adapter is connected with the USB interface; the USB protocol converter is connected with the USB interface and the system controller; the system controller is respectively connected with the USB protocol converter, the crystal oscillator and the JTAG downloading interface module; the JTAG downloading interface module is connected with the system controller. According to the downloading device for the field-programmable gate array logical code, which is disclosed by the invention, a FPGA (field-programmable gate array) device is subjected to logical code downloading in the JTAG mode via the USB interface. According to the device, the downloading rate is adjustable when the FPGA logical code is downloaded, the working state of the FPGA device and the logical code downloading progress can be monitored while downloading.

The invention discloses a device for measuring frequency characteristics based on zero-intermediate-frequency quadratic orthogonal demodulation. The device comprises an orthogonal frequency sweeping signal source, wherein a first output end of the orthogonal frequency sweeping signal source is connected with a first multiplying unit and a third multiplying unit; a second output end of the orthogonal frequency sweeping signal source is connected with a second multiplying unit and a fourth multiplying unit; an independent frequency sweeping signal source is connected with a measured network, the first multiplying unit and the second multiplying unit; the measured network is connected with the third multiplying unit and the fourth multiplying unit; the first multiplying unit, the second multiplying unit, the third multiplying unit and the fourth multiplying unit are respectively sequentially connected with a low-pass filter and an ADC (Analog to Digital Converter) module; the ADC module is connected with an MCU (Micro-programmed Control Unit) module; the MCU module is connected with a displayer. The invention also discloses a method for measuring the frequency characteristics based on the zero-intermediate-frequency quadratic orthogonal demodulation. By adopting the zero-intermediate-frequency quadratic orthogonal demodulation, the method and the device solve the problem of IQ mismatch in orthogonal demodulation and realize accurate measurement on frequency characteristics of the network (circuit).

The invention relates to a control circuit of a front metal halide headlamp, in particular to a control circuit of a metal halide headlamp of a digitized locomotive, which mainly consists of the following five parts: an input circuit carries out rectification filtering on input voltage and inhibits an electromagnetic wave; an APFC grade outputs 400V DC voltage as the input voltage of the DC/DC-grade; a DC/DC grade carries out power processing; a DC/AC grade changes DC into AC, the drive of an IGBT tube thereof is realized by outputting a low-frequency sweeping square wave with 50% of a fixed duty ratio through the I/O port of a single-chip microprocessor; a secondary trigger is used for generating a high pressure to start up an HID lamp; and a digital controller is used for realizing voltage, current and power control and abnormal condition protection. The control circuit can achieve the cold-hot startup of a lamp tube, adopts the working mode of utilizing low-frequency to sweep square wave, avoids the acoustical resonance phenomena of a metal halide, and realizes matching of different load characteristics in different stages of ballasts and the lamp.

The invention discloses a generator exciting function simulation test system, comprising an industrial personal computer and an excitation adjusting machine; the industrial personal computer is provided with a human-machine interface module and a communication module; through an exchange, the communication module of the industrial personal computer transmits analog and switch information to the excitation adjusting machine and receives a control feedback signal sent by the excitation adjusting machine; the excitation adjusting machine is provided with a communication interface, the communication interface is connected with the exchange, receives analog and switch information sent by the industrial personal computer, and sends control feedback information to the industrial personal computer. Existing hardware in an excitation system is made full use, adding extra hardware equipment to a test is not required, the hardware circuit is simplified, traditional three-phase protective inspector and cable wiring are omitted, the test operation process is simplified, and feedback and judgment can be made automatically according to test results.

The invention belongs to the field of electronic communication, in particular to a DSP-based electronic communication system, including a DSP control module, a communication module, a bus transceiver module, a data communication module and a host computer system, and the DSP control module establishes communication with the host computer system through the communication module , to realize memory sharing; the bus transceiver module is composed of a receiver and a transmitter, the receiver is used to receive data for serial-to-parallel conversion, and the transmitter is used to send data and convert it into a data string; the data communication module is connected to the acquisition module in the DSP control module. The invention has the characteristics of simple and effective hardware circuit, strict guarantee of data communication reliability, good compatibility and strong universality.

The invention relates to the technical field of vehicle audios and videos, and provides a vehicle-mounted audio equipment speech control system. The system comprises a hardware system and a software module, wherein the hardware system is composed of a directional pickup, a speech recognition module, a control module and an audio module; the pickup collects a speech command emitted by a driver; thespeech recognition module is used for converting a physical speech signal output by the pickup into a digital speech signal, and recognizing Chinese characters or words corresponding to the speech command; and the control module generates a corresponding entry encoding command, and transmits the control command to audio equipment via a system I/O port line. According to the vehicle-mounted audioequipment speech control system, an SDA80D51 chip is used, so that speech recognition and control of speaker-independent of the vehicle-mounted audio equipment are achieved. The chip is high in integration level, so that fewer peripheral modules are needed, the designed hardware circuit is simple, and the system is convenient to debug and detect.

The invention provides a control method and a control apparatus for a motor, and a fan. The control method for the motor comprises the steps of detecting whether the phase current of the motor reaches a zero crossing point or not; and when it is detected that the phase current of the motor reaches the zero crossing point, adjusting the d-axis voltage of the motor to enable the phase voltage of the motor to be consistent with the phase of the phase current. By adoption of the technical scheme, the optimization of the motor efficiency can be ensured to satisfy the energy-saving control requirement; in addition, a hardware circuit also can be simplified, and the production cost of the product can be lowered; and meanwhile, the reliability and the stability of the product also can be improved.