8results about How to "Constant current" patented technology

The utility model relates to water body sterilization equipment technical field, concretely relates to a novel water body sterilization and purification module, including the casing, is equipped with the blue oxygen generating component that produces blue oxygen of water on the casing, is equipped with the PCB board for sealing and installing drive circuit in the casing bottom, blue oxygen generating component includes the cathode plate of drive circuit electricity connection, anode plate, has the hydroxyl coating on anode plate, the application hydroxyl plating layer electrolytic water technology is applied to the sterilization and purification field in the domestic water body environment, and the bactericidal effect is stronger, and the efficiency is higher, the volume is small and clever, and the structure is simple, produces different sterilization and purification material, carries out sterilization and purification to water body from different aspects such as ion, molecule, and the effect is better, the current is constant, and the sterilization and purification effect is not affected by water quality, and blue oxygen generating component not only has the function of sterilization, but also can purify water body, realizes the dual efficacy of sterilization, purifies water quality, and the application range is wider.

The invention discloses a closed-loop control current source circuit based on an NMOS tube, and belongs to the technical field of power electronics, when the state of a power supply or a load is changed and the current is changed, the closed-loop control current source circuit based on the NMOS tube can change the drain-source voltage of the NMOS tube through the closed-loop control of the NMOS tube in a feedback control sub-circuit, and the closed-loop control current source circuit based on the NMOS tube can change the current of the NMOS tube through the closed-loop control of the NMOS tube in the feedback control sub-circuit. Therefore, the working state of the closed-loop control current source circuit based on the NMOS tube is adjusted so as to keep the current constant. Therefore, the current source circuit provided by the invention can continuously and automatically adjust the states of the operational amplifier and the NMOS tube by continuously monitoring the value of the current flowing through the sampling resistor, ensures that the current flowing through the sampling resistor and the load is kept stable, and realizes a controllable current source.

The utility model provides a power supply circuit for a micro differential pressure transmitter and the transmitter. The power supply circuit comprises a power supply management module, a first power supply module and a second power supply module which are connected in sequence. The power management module is connected with an external power supply, and the power management module is used for outputting a first power supply with stable first voltage and first current. The first power supply module is used for outputting a second power supply to supply power to the display module of the transmitter. The third power supply circuit is connected to the common end of the first power module and the second power module. And the third power supply circuit supplies power to the micro differential pressure core body and the transmitting circuit of the transmitter, and the current value of the third power supply circuit is obtained by subtracting the working current of the second power supply module from the first current. According to the utility model, through accurate current control and distribution, stable current supply of the transmitter in different working states is ensured, and the problem of current fluctuation caused by working state switching of the digital micro-differential pressure core body in the existing micro-differential pressure transmitter is improved.

This disclosure provides a charger circuit and charger, comprising: an input module adapted to rectify and filter a supply voltage to generate a transformer voltage; the transformer comprising: a primary coil, a secondary coil, and an auxiliary coil, wherein a first end of the primary coil is coupled to the input module, and a third end of the primary coil is coupled to an adjustment module; the secondary coil is coupled to an output module; the first end of the auxiliary coil is coupled to the adjustment module; the adjustment module is adapted to generate a drive signal with an initial duty cycle when receiving the transformer voltage to select a path between the third end of the primary coil and a first ground, and to detect the feedback current on the first end of the auxiliary coil when the path is selected by means of resistor voltage division, and to adjust the duty cycle of the drive signal according to the magnitude between the feedback current and a preset current to change the current at the first end of the auxiliary coil; and an output module. Using the above technical solution, a constant current value can be provided, improving the charging stability of electronic devices.

This invention discloses a voltage drop detection circuit and a voltage drop detection system. The voltage drop detection circuit includes: a signal receiving module for receiving a set current value; a PLC control module for generating a control signal based on the set current value; an electronic load connected to the PLC control module, which adjusts its resistance according to the control signal; a first power supply module, one end of which is connected to the electronic load and provides a first power supply; an interface module, one end of which is connected to the other end of the first power supply module and the other end of which is connected to the other end of the electronic load, for connecting the load under test; and a signal acquisition module connected to the interface module, for acquiring the voltage signal of the load under test. This invention ensures that the current in the voltage drop detection circuit remains constant, thereby simplifying the voltage drop detection process.

The invention relates to an electronic balance and a method for improving uncertainty of the electronic balance, the electronic balance comprises a permanent magnet, the permanent magnet is fixedly connected with a base of the electronic balance, the permanent magnet is provided with a center hole, a stand column is arranged in the center hole, the upper end of the stand column is provided with a tray, and the lower part of the stand column is provided with a moving coil; the stand column is elastically connected with a base of the electronic balance through a tension spring, the stand column is provided with a heat dissipation channel, the lower end of the heat dissipation channel is communicated to the moving coil, and the upper end of the heat dissipation channel is communicated to the upper portion of the center hole. The structure of the electronic balance is improved, and the influence of demagnetization of the permanent magnet on the uncertainty of the electronic balance can be reduced. In addition, in combination with the method provided by the invention, whether the measurement uncertainty of the electronic balance is increased due to the demagnetization of the permanent magnet can be judged in time.

The invention discloses a high-low brightness constant current time-sharing line scanning control system and control method based on machine vision, and the system comprises: 1, a high-low brightness constant current time-sharing line scanning control system based on machine vision, which comprises a main control module; a brightness high-speed switching module; the constant-current light source driving module comprises a first voltage following circuit, an FPGA (Field Programmable Gate Array) control branch and an LED light source driving branch; a large and small power switching module; a heat dissipation module; a temperature detection module; the control method of the high-low brightness constant-current time-sharing linear scanning control system based on machine vision comprises the following steps: S1, inserting an LED light source; s2, the first brightness adjusting signal is sent to a brightness high-speed switching module, and the second brightness adjusting signal is sent to a constant-current light source driving module; s3, the high and low power switching module is switched into high power or low power; s4, switching the heat dissipation module into high-power heat dissipation or low-power heat dissipation; and S5, the temperature detection module carries out multi-point position temperature measurement on the machine vision environment.

This application provides an electrochemical device, an electrical device, and a charging device. The electrochemical device includes an electrode assembly and a charging circuit configured to receive a charge current and charge the electrochemical device. The first electrode plate includes a first current collector, a first active material layer disposed on a surface of the first current collector, and X first tabs, where X is an integer greater than 1, and the X first tabs and the first current collector are integrally formed. The second electrode plate includes a second current collector, a second active material layer disposed on a surface of the second current collector, and Y second tabs electrically connected to the second current collector, where Y is an integer greater than or equal to 1, and Y < X. The electrochemical device, the electrical device, and the charging device according to this application can avoid the loss of active materials, and avoid a series of problems caused by uneven thinning. In addition, compared with a multi-tab winding structure, the electrochemical device can keep the capacity and energy density from losing. Moreover, coupled with a pulse charging manner, the structure disclosed herein significantly improves the charging capabilities of the electrochemical device under low-temperature conditions.