There are provided a DC-DC converter and an organic light emitting display device using the same. A DC-DC converter includes a converting module and a sensing unit. The converting module includes a switching module and a control module. The switching module has a plurality of switches, and each of the plurality of switches converts an input voltage into a first voltage and outputs the first voltage while being turned on/off in response to a corresponding pulse width modulation (PWM) signal. The control module controls a switching operation of the switching module by generating the PWM signal. The sensing unit senses driving current supplied to a load to which the first voltage is provided.

Dc-dc converter and organic light emitting display device using the same

Dynamic power grid panorama display system on basis of virtual reality

The invention provides a protocol conversion method and device. The protocol conversion device at least comprises a first communication interface and a second communication interface. The protocol conversion method comprises the following steps: binding corresponding protocol types for the communication interfaces, and selecting corresponding decoding and encoding rules from a preset rule base; receiving source communication protocol data from a first communication interface, judging the protocol type of the source communication protocol data, and decoding the source communication protocol data to generate decoded data; and encoding the decoded data to generate target communication data, and sending out the target communication data through a second communication interface. The method and the device in the invention have the advantages that the types of source communication protocols and target communication protocols are unrestricted, thus realizing data conversion for a plurality of the existing standard protocols and manufacturer custom protocols, and solving the problems such as single product function and worse reusability as a result that only specific protocols can be converted in the prior art.

Protocol conversion method and device

Embedded system capable of upgrading software on line and online upgrading method

The invention discloses a method for upgrading a singlechip program by means of a connected off-chip Flash, which includes the following specific steps: (S100) a singlechip, a ROM (read only memory) of which is at least divided into a Bootloader area and an application area, is chosen; (S200) the off-chip Flash is chosen, and is connected with the singlechip; (S300) an upgrading command which at least contains the size of an upgrade firmware program is sent to the singlechip, and according to the size of the upgrade firmware program, a corresponding space is erased out in an application buffer of the off-chip Flash; (S400) the firmware program is received by the target singlechip, and is written into the application buffer of the off-chip Flash. By installing the upgrade firmware program in the off-chip Flash, setting an upgrade identifier and introducing multiple times of starting check, the method can greatly increase the utilization rate of the ROM without occupying the singlechip ROM in a large quantity, and moreover, after multiple times of starting check, the upgrade firmware program can be effectively prevented from being damaged or becoming incomplete to cause the circumstance that the singlechip cannot be started.

Method for upgrading singlechip program by means of connected off-chip Flash

The utility model relates to an SF6 gas leakage on-line monitoring device based on multiple sensors. The device is composed of a microprocessor, a data collection and conditioning device, a ventilation and alarm control device, a communication circuit and a power supply circuit. The microprocessor comprises a memorizer and an analog-to-digital converter; the data collection and conditioning device comprises an SF6 gas concentration sensor, an O2 gas concentration solid state sensor, an H2S gas concentration electrochemical sensor, an SO2 gas concentration electrochemical sensor, a temperature sensor, a humidity sensor and a signal conditioning circuit; the power supply circuit provides a direct current power supply; the ventilation and alarm control device comprises an alarm, a fan controller and a control circuit; the communication circuit is of short distance wireless communication or wire communication which is a path for wire communication. By monitoring data information which is relevant to SF6 gas concentration, the device applies the information fusion technology to realize compensation on automatic calibration and data measurement of a measurement system and the strategy which determines to output alarm signals, thereby enhancing the accuracy and the reliability of the measurement and prolonging the service life.

On-line monitoring device for SF6 gas leakage base on multi-sensor

The utility model relates to an electricity-monitoring device, in particular to a distributed remote electricity-monitoring device based on the virtual reality technology and the embedded technology. The device is composed of a remote monitoring end and an on-spot monitoring end, which are communicated with each other by radio frequency; wherein, the remote monitoring end is composed of three-dimensional scene display, user operation processing, three-dimensional scene generation processing, a three-dimensional equipment model library, data query, data storage, system configuration, protocol processing and remote communication; the on-spot monitoring end is composed of a remote communication, a protocol processing, a data acquisition unit, acquisition unit data storage and an on-spot data acquisition node. The device successfully introduces the virtual reality technology into the remote monitoring field in order to realize the three-dimensional panoramic display of a user interface, and combines the radio frequency technology and the embedded technology together to develop a universal data concentrator, so that the remote monitoring of power installations becomes more intellectualized.

Novel distributed remote electric power monitoring apparatus

The invention relates to the technical field of security equipment, in particular to a monitoring system and a monitoring method for video monitoring front-end equipment. A monitoring terminal is embedded into the video monitoring front-end equipment, so that working states and working environment parameters of the video monitoring front-end equipment such as monitoring cameras, communication equipment, power supplies, light supplementing lamps and cooling fans can be monitored in real time. Moreover, monitoring client software is embedded on a monitoring platform, and detection data is transmitted through a transmission network of the system, so that running states and equipment working conditions of all the front-end equipment on video monitoring point locations can be monitored in a centralized way, and fault equipment at the front end of any point location and fault causes can be found and located in time. Maintenance personnel can carry out maintenance work specifically according to alarm information, and missing of monitoring data is reduced to the maximum extent.

Monitoring system and monitoring method for video monitoring front-end equipment

The invention relates to a self-adaptive supply voltage converter, in particular relating to a self-adaptive supply voltage converter for online storage battery voltage detection. The self-adaptive supply voltage converter is characterized in that the converter is composed of a power supply input terminal, a voltage detector, an electronic switch, a DC-DC voltage booster circuit, diodes, a voltage stabilizer for an electrical source with low pressure difference and a main circuit; wherein the input terminal of the electrical source, the electronic switch, the DC-DC voltage booster circuit, the primary path diode, an LDO and the main circuit are sequentially connected, forming a primary path; the electronic switch passes through the bypass diode and is connected with the LDO, forming a parallel bypass; the electrical source passes through the voltage detector and is connected with the electronic switch, forming a detection circuit. When the input voltage is lower than the threshold voltage, the DC-DC voltage booster circuit begins to work, the bypass is cut off while the primary path diode is conducted, then the input voltage is supplied to the main circuit after being stabilized by the LDO. With the voltage converter of the invention, storage battery voltage detection can be carried out to all storage batteries, thus improving detection universality and meeting the specific requirements in battery voltage detections to different rated voltages.

Self-adapting power supply voltage converter

The invention relates to a voltage real-time monitoring method for series battery group and a device thereof The device is composed of a battery group, a dividing voltage circuit, multi-selection analogue switch, a high accuracy AD converter and a main control single chip, wherein the output voltage of each battery is connected with a multi-path analogue switch array and is connected with the high accuracy AD converter, the main control single chip is connected with the high accuracy AD converter via a I2C communication bus When in use, the system sets the output voltage of RB0-RB2, selects two analogues switches U1, U2 connected with the anode and cathode of the battery, connects the high accuracy AD converter U3; the single chip U4 uses the I2C bus to control U3 to start AD conversion and reads the result into the single chip U4; judges the range of the measurement result, adjusts the gain of a programmable amplifier of U3, and processes data judgment The invention simplifies the process and device of voltage real-time monitoring of series battery group, improves reliability and satisfies the demands of real-time monitor on a battery group

Shengzhen Cai

Papers

On-line monitoring device for SF6 gas leakage base on multi-sensor

Novel distributed remote electric power monitoring apparatus

Monitoring system and monitoring method for video monitoring front-end equipment

Self-adapting power supply voltage converter

Method and apparatus for real time monitoring tandem type accumulator battery voltage