640results about How to "Improve sensing accuracy" patented technology

The invention provides an electric pressure cooker, comprising an outer cooker, an inner cooker, a heating device, an elastic cell, a sealing device, a safety device and a control circuit which controls the pressure cooker to work. Besides, the invention also comprises a capacitance sensor, wherein the capacitance sensor comprises a first polar plate and a second polar plate, the heating dish is dislocated by the pressure to drive the first polar plate to move corresponding to the second polar plate, the signal of the capacitance change value is generated by changing the distance between the two polar plates, then the signal is inputted to the control circuit to detect and dispose, thus controlling the electric pressure cooker to work. The invention achieves the real-time detection and control of the pressure. As the pressure is continuous and adjustable, different pressure or working time can be chosen according to the condition of different food during the process of cooking. The capacitance value extra generated due to the capacitance sensor being disturbed by the temperature and the electromagnetic is counteracted by the compensating capacitance greatly. The signal quantity is effectively enlarged by the lever device, thus improving the detecting accuracy and the sensibility of the capacitance sensor.

The invention relates to the touch technical field and in particular relates to a pressure sensor and a display device. The pressure sensor comprises a plurality of pressure units. Each of the pressure units comprises four resistors same in resistance value, the four resistors form a Wheatstone bridge, two of the resistors form a first resistor group and the other two form a second resistor group; in a direction vertical to the plane of the pressure units, orthogonal projections of electrodes of the two resistors in each resistor group are at least overlaid partially; the extending directions of electrode pattern shapes of the two resistors in each resistor group are different. The pressure sensor has the advantages of being high in resolution and sensing precision. The display device comprises the pressure sensor. As the pressure sensor has the advantages of being high in resolution and sensing precision, the product competitiveness of the display device is enhanced.

An ECU converts a cylinder pressure P and a cylinder volume V corresponding to a crank angle θ at least from a compression stroke to a combustion and expansion stroke to a logarithmic value log P and a logarithmic value log V, respectively, to find a logarithmic conversion waveform and estimates a motoring waveform which is obtained by subtracting a pressure rise developed by combustion in a cylinder from the logarithmic conversion waveform, that is, corresponds to a non-combustion state. Further, the ECU computes a determination line Y of an ignition timing Tburn on the basis of the base line X of the estimated motoring waveform and determines the ignition timing Tburn on the basis of this determination line Y and the logarithmic conversion waveform.

This invention discloses an apparatus capable of controlling, tracking and measuring the tightening torque and the locking force and a method thereof. The device comprises a control device, a transducing device, and a sensing device. The transducing device comprises a second connector and a first signal transmitter. The control device communicates with the transducing device through a second signal transmitter and the first signal transmitter wiredly or wirelessly. The sensing device comprises a first connector and a sensor, and electrically connects to the transducing device through the second connector and the first connector. The sensing device senses the torque applied to a fastener to transmit real-time sensing data to the control device. The control device compares the real-time sensing data with a setting value so as to measure, control or track the locking force or tightening torque applied to the fastener in real time.

The invention provides a portable electronic device having a fingerprint identification function. The portable electronic device comprises a fingerprint sensing unit, a signal conversion unit, a processing unit and a storage unit which are electrically connected in sequence, wherein the fingerprint sensing unit comprises a touch control sensing module which can acquire fingerprint characteristic information by pressure. The touch control sensing module acquires the fingerprint characteristic information by pressure, the information conversion unit is used for extracting the fingerprint characteristic information and converting the fingerprint characteristic information into the fingerprint data, the fingerprint data is converted into the fingerprint image characteristic data by the processor unit, and the processor unit compares the fingerprint image characteristic data with the fingerprint characteristic data pre-stored in the storage unit and determines whether the electronic device is started to enter a normal working state according to the comparison result.