56results about How to "Improve output sensitivity" patented technology

The invention discloses a double rood beam high-sensitivity six-dimensional moment sensor in the technical field of robots. The double rood beam high-sensitivity six-dimensional moment sensor comprises two rood beams, two dead rings, one outer ring, and a plurality of resistance strain gages; a first rood beam and a second rood beam are arranged outside the outer ring respectively and are used as elastic bodies of the sensor for sensing stress; two dead rings are arranged outside the first rood beam and the second rood beam respectively; the resistance strain gages are adhered to the rood beams; each of the rood beams consists of four identical double-hole parallel sub beams; each double-hole parallel sub beam is provided with an I-shaped through hole; and a center hole is formed in the geometric center of each rood beam. In the double rood beam high-sensitivity six-dimensional moment sensor, floating beams used by the conventional six-dimensional moment sensor and crosstalk caused by the floating beams are removed, multi-component coupling is reduced conveniently and the measurement accuracy is improved.

A capacitive pressure sensor and method for its fabrication. The sensor is fabricated from first and second wafers to have a mechanical capacitor comprising a fixed electrode and a moving electrode defined by a conductive plate. The sensor further has a diaphragm on a surface of the first wafer that is mechanically coupled but electrically insulated from the conductive plate. A conductive layer on the surface of the first wafer is spaced apart from the conductive plate to define the fixed electrode. The second wafer is bonded to the first wafer and carries interface circuitry for the sensor, including the conductive plate and the fixed electrode which are between the first and second wafers and electrically connected to the interface circuitry. At least an opening is present in the first wafer and its first conductive layer by which the diaphragm is released and exposed to an environment surrounding the sensor.

A giant magnetoresistive (GMR) element includes a first antiferromagnetic layer, a pinned magnetic layer having a magnetization direction pinned by the first antiferromagnetic layer, a nonmagnetic material layer, a free magnetic layer having a magnetization direction with a central portion changing with an external magnetic field, a nonmagnetic layer, ferromagnetic layers formed on both sides of the nonmagnetic layer, and second antiferromagnetic layers for aligning the magnetization direction of the ferromagnetic layers perpendicular to that of the pinned magnetic layer. The magnetization directions of the free magnetic and ferromagnetic layers are antiparallel to each other. At least the free magnetic layer, the nonmagnetic layers and the ferromagnetic layers have continuous surfaces α at both end surfaces in the track width direction. First electrode layers are provided in contact with the continuous surfaces α, and second electrode layers are provided on the first electrode layers and the second antiferromagnetic layers.

A color CCD linear image sensor has: first basic pixels arranged in a first column and configured to accumulate first-column pixel charges; and second basic pixels arranged in a second column adjacent to the first column and configured to add accumulated charges to the first-column pixel charges to generate second-column pixel charges. The first basic pixels include a first-column first-color pixel, a first-column second-color pixel adjacent to the first-column first-color pixel, and a first-column third-color pixel adjacent to the first-column second-color pixel. The second basic pixels include a second-column first-color pixel, a second-column second-color pixel adjacent to the second-column first-color pixel, and a second-column third-color pixel adjacent to the second-column second-color pixel. The second-column first-color pixel is arranged adjacent to the first-column second-color pixel.

A circuit structure capable of adjusting gradient of output to temperature variation includes at least a sensing unit for detecting ambient temperature variation and generating a sensing signal, an amplifying unit connected to the sensing unit for increasing a level of the sensing signal, and an adjusting unit connected to the amplifying unit for increasing or decreasing an amplification ratio of the amplifying unit, so as to change a gradient of an output of the amplifying unit to temperature variation.

The present invention relates to an extracorporeale interface unit (8), for an intravascular measurement system for measuring a physiological, or other, variable in a living body, being adapted to generate a sensor signal in response of said variable. The interface unit (8) comprises a sensor interface circuitry (6) adapted to interface a sensor wire configured to be inserted into the living body and provided with one or many sensor element(s) at its distal region. The sensor interface circuitry (6) further comprises a measurement unit (9) adapted to generate the measured data of the variable as a sensor signal. The sensor interface circuitry (6) comprises two current source units (CSU1, CSU2) adapted to energize the sensor element(s) via at least two connection points (CP1, CP2, . . . CPn), and a switching unit (10), wherein the switching unit (10) is adapted to alternately switch connection between the current source units (CSU1, CSU2) and at least two of the connection points (CP1, CP2, . . . CPn), using a preset switching frequency having essentially the same connection time period (T_c) for each connection. The measurement unit (9) is adapted to determine a sensor variable value (V_diff) related to the variable at two of the connection points (CP1, CP2, . . . CPn). The present invention further relates to a measurement system (12) comprising said extracorporeale interface unit (8) and a method in said interface unit.

The invention discloses a strain sensor for measuring structural deflection. The strain sensor is fixed on the surface wall of a tested structure and comprises an elastic body, a strain gauge and installation brackets, wherein the strain gauge is arranged in the elastic body; the elastic body is provided with installation holes distributed on both sides of the strain gauge; one end of each installation bracket is welded together with the tested structure, and the other end of each installation bracket passes through each installation hole and is fixed in each installation hole through a self-locking nut; the installation brackets and the installation holes correspond to each other one by one; and the elastic body is fixed on the neutral surface of the tested structure through the installation brackets. By adopting the strain sensor for measuring the structural deflection, the technical defect that a sensor in the prior art cannot be used for detecting a beam in real time is overcome, the measuring accuracy of the sensor can be increased simultaneously, and the service life of the sensor is prolonged.

The present invention is intended to provide a ultra-precision high sensitivity displacement measuring device which has such a high resolution as to be able to make submicron measurement. According to the invention, there is provided a displacement measuring device with high resolution, comprising: an electromagnetic system(10) which forms a closed loop of magnetic blocks(17,19) and which houses primary coil bundles(11) and secondary coil bundles(13) for forming magnetic fields within said closed loop of magnetic blocks(17,19); plate springs(20) which include displacement input parts(21) and displacement output zones(24) fixed to the cores(14) having the secondary coils wound around them and which act to guide so that the displacement output zones(24) can output the displacement amplified in proportional to the displacement input to the displacement input parts(21); and a supporting mechanism(30) for supporting the displacement input parts(21) of said plate springs(20) so that the displacement may be input only in one axial direction. (FIG. 2).

According to the differential pressure sensor, the preparation method and the application thereof, a three-layer silicon wafer bonding mode is adopted, an upper layer structure and a middle layer structure both adopt SOI wafers, and a lower layer structure adopts a graphical doped intrinsic silicon wafer; lead bonding pads of the electrodes are positioned on three steps on one side of the sensor; the peripheries of the upper electrode and the lower electrode are provided with approximately annular through holes. According to the sensor, the path of the electric field line of the fixed capacitor part is prolonged, so that the fixed capacitance in a capacitance signal output by the upper capacitor is reduced; the lower-layer structure adopts intrinsic silicon, and only the lower-layer electrode and the lead part are doped and can conduct electricity. By picking up the variable quantity of the two capacitors, the measurement of the pressure difference of fluid in the two different cavities is realized; the output sensitivity, the resolution ratio and the linearity of the sensor are all improved; external lead welding spots of the sensor are arranged at the three-layer step, an external circuit is electrically connected with a sensor lead at the three-layer step, and integration and packaging of the sensor are facilitated.

The invention discloses a differential MEMS accelerometer based on a tunneling magneto-resistor array. The differential MEMS accelerometer comprises a magnetic field generation and detection part on a lower layer, a magnetic field modulation part on an upper layer and an installation frame where the magnetic field generation and detection part and the magnetic field modulation part are located, the magnetic field generation and detection part comprises a magnet exciting coil, a tunneling magnetoresistor and a magnetic field collector, and a constant-intensity magnetic field can be generated and the change of the magnetic field influenced by a modulator can be detected; and a main body of the upper-layer magnetic field modulation part is a mass-flexible structure, and a magnetic field regulator is arranged on the lower surface of a mass block and can modulate a magnetic field. In addition, the accelerometer is also provided with a differential detection structure, so that the sensitivity can be improved, and the temperature noise can be reduced. According to the invention, an acceleration-magnetic field intensity-resistance signal conversion mode is adopted, the high change rate characteristic of the tunneling magnetoresistance is fully utilized to improve the acceleration detection efficiency, and meanwhile, an integration method is adopted in the process, so that the method has incomparable advantages in the aspects of precision and volume, and can be widely applied to the fields of high-precision inertial navigation and military industry.

The invention provides a special-shaped metal cantilever weighing device.A flaky weight sensor is formed by a rectangular metal sheet (100) with a G-shaped hollowed-out part (101).The metal sheet (100) and the hollowed-out part (101) jointly form a C-shaped cantilever.The part between the hollowed-out part (101) and the metal sheet forms a cantilever front part (201), the part perpendicular to the cantilever front part (201) is a cantilever middle part (202), and the remaining part of the cantilever is a cantilever rear part (203).The cantilever front part (201) is a free end provided with a front protrusion (301) and a corresponding front pit (302).The special-shaped metal cantilever weighing device is characterized in that the width of the cantilever front part (201) is 10% larger than that of the cantilever rear part (203) so that overlarge torque cannot be generated on the cantilever rear part (203) while the front protrusion (301) and the corresponding front pit (302) are formed on the cantilever front part (201).

A wide-range inductance measuring head is composed of a measuring guide rail and a measuring magnetic circuit in a connecting mode. The measuring guide rail is formed by the fact that a measuring rod is arranged inside a shaft sleeve. A measuring head is arranged at the front end of the measuring rod, a measuring steel ball is embedded at the front end of the measuring head, a holder is arranged on the measuring rod, four rows of stabilized steel balls are evenly arranged between the holder and the measuring rod, the rear portion of the measuring rod is connected with the front end of the holder, and a limiting device is further arranged on the measuring rod. The measuring magnetic circuit is that a magnetic core is arranged inside a magnetic sleeve, a coil framework is sleeved outside the magnetic core, a left magnetic ear and a right magnetic ear are respectively arranged at two ends of the magnetic core, and a left limiting device and a right limiting device are further arranged on the left magnetic ear and the right magnetic ear. A connecting rod is arranged at the right end of the magnetic sleeve, the connecting rod penetrates through the right magnetic ear and is connected with the magnetic core, and a spring device is arranged on the connecting rod.

The invention discloses a sensing system by detecting deformation quantity of a vehicle axle housing to weigh the load. The weighing sensing system based on deformation quantity detection of the vehicle axle housing comprises a sensing element and a data processing device; and the weighing sensing system also comprises an elastic body for carrying the sensing element, wherein the sensing element is arranged inside the elastic body, and the elastic body is arranged on a neutral plane position on the surface wall of the vehicle axle housing. Due to the adoption of the weighing sensing system based on the deformation quantity detection of the vehicle axle housing, technical weaknesses of the prior art that detection data cannot reflect the real load situation and the service life of the sensing element is influenced because the stress deformation can cause unnecessary internal stress influence on the sensing element can be overcome, relative precision of the detection can be realized, and the sensing element can be effectively protected.

The invention discloses a gas outburst sensor based on a sound wave principle and belongs to a gas sensor. The gas outburst sensor comprises a casing, a frontal sound cavity, an ultrasound piezoelectric film, lateral sound cavities, metal films, fixing electrode plates and a lead, wherein the frontal sound cavity is arranged in front of the casing, the lateral sound cavities are arranged on the side of the casing, the ultrasound piezoelectric film is connected in the frontal sound cavity, the metal films and the fixing electrode plates are sequentially connected in the lateral sound cavities, the lead and the ultrasound piezoelectric film are connected at the back of the casing, at the same time, the lead, the metal films and the fixing electrode plates are arranged, the frontal sound cavity and the ultrasound piezoelectric film form an ultrasonic detector, the number of the lateral sound cavities, the metal films and the fixing electrode plates is respectively two, the lateral sound cavities, the metal films and the fixing electrode plates form two low-frequency acoustic detectors, and by the aid of detection of high-frequency sound waves and low-frequency sound waves, sound waves produced by gas jet which is ejected out of seams of coal layers can be analyzed. The gas outburst sensor has the advantages that high-frequency sound wave signals and low-frequency sound wave signals which are ejected out by the high-pressure gas in the coal layers through seams of the coal layers can be detected, and real-time monitoring for mine gas outburst is achieved.