69results about How to "With hysteresis" patented technology

In an A / D converter circuit having a chopper comparator, only a small number of elements are additionally provided to impart a hysteresis characteristic to the comparator, thereby reducing the conversion errors caused by noise. In a successive approximation type A / D converter circuit having a chopper comparator, one or more amplifier stages are provided to the comparator circuit (CMP), and a feedback capacitor (Cf), which is connected to the input terminal of one of the amplifier stages, is also provided to the comparator circuit (CMP). In the A / D converter circuit, during a first interval, an input analog voltage is taken in, and during a second interval, a voltage, which is in accordance with a potential difference between the input analog voltage and the comparison voltage, is inputted and the input potential is amplified by the amplifier stages. When the output of the comparator circuit changes, a positive feedback is applied through the feedback capacitor to the input terminal of the corresponding amplifier stage, thereby providing a hysteresis of 1 LSB or less.

The invention discloses a ship seawater pipeline flexible compensation mechanism which comprises sleeves, two connecting pipes and compensation devices. The two connecting pipes have identical centralaxes and are separated from each other by cushion distances; the sleeves are arranged on the outer peripheries of the two connecting pipes; the compensation devices comprise flange plates, annular fixing plates and elastic flexible bodies, the flange plates are fixed onto the two connecting pipes, the annular fixing plates are fixed onto the inner walls of the sleeves, and the elastic flexible bodies are adhered between the flange plates and the fixing plates. The ship seawater pipeline flexible compensation mechanism has the advantages that the elastic flexible bodies are arranged between the flange plates and the fixing plates, accordingly, the stress levels of pipelines can be effectively lowered, pipeline vibration generated by equipment or fluid excitation can be effectively consumed, and the noise levels of the pipelines can be lowered; the flange plates are arranged on the inner sides of the fixing plates and can be compressed to the fixing plates under internal pressures of fluid in the pipelines, and accordingly the ship seawater pipeline flexible compensation mechanism has a self-sealing characteristic; the ship seawater pipeline flexible compensation mechanism is easy and convenient to manufacture and mount, low in cost and extensive in application range.

The invention discloses a direct-current (DC) solid-state relay, and belongs to the relay field. The relay is composed of an input circuit, an isolating circuit and an output circuit which are sequentially connected together, wherein, the input circuit and the output circuit are respectively composed of a resistor, a switching tube and a diode, and a photoelectric coupler is adopted in the isolating circuit. The DC solid-state relay has the advantages that a positive feedback circuit is introduced into the input circuit so that the break-over voltage value and the cut-off voltage value of therelay are separated from each other and a certain margin is reserved; the relay has hysteresis characteristic, thus avoiding a critical jitter phenomenon; relay output is not affected by load, and ports are relatively independent; and the relay can accurately work in the case of an operation critical value, thus improving the operating stability.

This invention relates to one car control lock device with CAN interface, which comprises power circuit to realize CAN communication drive interface circuit to realize information sending, receiving and processing and controlled single machine circuit; the drive central control gate lock motor drive circuit; position test circuit to test central gate lock position status; over current test circuit to test drive motor current and interface circuit; the communication agreement sets middle control lock device joint address, communication rate, message frame number and parameters and usage method.

The invention relates to the field of blast furnace smelting, and discloses a method for calculating an antegrade index of a blast furnace based on a moving range, which is used to calculate the antegrade index of a blast furnace more accurately, so as to improve the stability of blast furnace operation. The present invention first obtains the state parameters of the blast furnace in real time during the blast furnace production, including the blanking speed of the blast furnace, the wind pressure of the blast furnace, the top pressure of the blast furnace and the gas percentage in the blast furnace; Assign values, wherein, wind pressure, top pressure and gas percentage in the blast furnace are all assigned based on their respective moving ranges, the moving range refers to the fluctuation value of the blast furnace state parameters obtained in the latest period of time; finally through all blast furnace state The assignment and sum of the parameters are used to obtain the antegrade index of the blast furnace. The invention is suitable for blast furnaces in ironworks.

The invention relates to polycrystalline silicon ingot furnace equipment, and aims to provide a heat exchange platform of an improved structure for a polycrystalline silicon ingot furnace. The heat exchange platform is used for holding a polycrystalline silicon ingot furnace crucible and realizing heat exchange, and is provided with a gas inlet and a gas outlet; and the interior of the heat exchange platform is provided with a cooling gas channel, and is connected with the gas inlet and the gas outlet. Compared with the radiation cooling and the water-cooling type cooling technologies, the heat exchange platform disclosed by the invention is strong in control capacity and high in industrial controllability when being used for gas refrigeration; and furthermore, because the gas enters the heat exchange platform uniformly, the overall temperature of the heat exchange board is uniform, so that the uniform nucleation of a silicon melt at the bottom of the crucible is facilitated, and the temperature reduction speed at the bottom of the crucible in the crystal growth process can be precisely controlled.

The present invention relates to a method for preparing high-purity aluminium titanium carbide block material by utilizing hot-pressing process. Said method includes the following steps: using Ti powder, Al powder and TiC powder as raw material, using proper quantity of Sn as reaction adjuvant, mixing materials according to the mole ratio of Ti:Al:TiC:Sn=1:(0.9-1):1:(0-0.2), placing the mixed material and agate ball into a ball-grinding tank according to the ball material ratio of 2:1, dry mixing them for 5-10 h in ball-grinding machine, placing the uniformly-mixed material into a graphite mould, placing said graphite mould into a hot-pressing furnace, heating to 1350-1550 deg.C under the protection of argon atmosphere, at the same time applying pressure of 10-30 MPa then heat-insulating for 30-60 min so as to obtain the invented high-purity large-size Ti3AlC2 block material.

The invention provides a photomagnetic functional material of metallofullerene and its preparation method and application. The photomagnetic functional material of metallofullerene is in molecular form, with a size of about 1nm, a definite structure, easy manipulation, and performance It has single-molecule magnet performance and photoluminescence properties, and it has hysteresis phenomenon below 5K, and the metallofullerene containing Er has a luminescence wavelength in the range of 1400-1600nm, and the metallofullerene containing Y has a luminescence wavelength in the range of 700-800nm . Not only that, the photoluminescence wavelength or intensity of the optomagnetic functional material of the metal fullerene has modulation properties under the influence of an external magnetic field, that is, there is a coupling effect between magnetism and light, which can be used for quantum information storage or quantum computing. Material.