Abstract: Provided is a vibration gyro sensor including: a vibration element including a piezoelectric element group which has a first side provided with a drive electrode and a detection electrode and a second side opposed to the first side and provided with a common electrode, which vibrates by a drive signal input between the drive electrode and the common electrode and generates an output signal containing a detection signal corresponding to Coriolis force from the detection electrode; a bias section applying a bias voltage to the detection electrode; an oscillation circuit outputting the signal for causing vibration of the vibration element to the drive electrode as the drive signal based on the output signal generated by the detection electrode; and a phase inversion circuit outputting an inversion signal obtained by inverting a phase of the drive signal output from the oscillation circuit to the common electrode.

Abstract: Provided is a vibration gyro sensor including: a vibration element including a piezoelectric element group which has a first side provided with a drive electrode and a detection electrode and a second side opposed to the first side and provided with a common electrode, which vibrates by a drive signal input between the drive electrode and the common electrode and generates an output signal containing a detection signal corresponding to Coriolis force from the detection electrode; a bias section applying a bias voltage to the detection electrode; an oscillation circuit outputting the signal for causing vibration of the vibration element to the drive electrode as the drive signal based on the output signal generated by the detection electrode; and a phase inversion circuit outputting an inversion signal obtained by inverting a phase of the drive signal output from the oscillation circuit to the common electrode.

Abstract: A detection apparatus is provided which includes a cantilever vibration gyro including a piezoelectric element having a first side provided with a drive electrode and a pair of detection electrodes sandwiching the drive electrode with predetermined gaps therebetween and a second side opposed to the first side and provided with a common electrode, which vibrates by a drive signal input between the drive electrode and the common electrode and generates a pair of detected signals corresponding to Coriolis force from the detection electrodes. The detection apparatus also includes a bias applying section for applying a bias voltage to the detection electrodes, an adding section adding the pair of detected signals, a first phase delay section delaying a phase of the detected signal obtained by the addition by a range larger than 45° and smaller than 90°, and an amplitude control section controlling the delayed detected signal to a predetermined voltage amplitude to output as the drive signal.

Abstract: There is provided an oscillation type gyro sensor including an oscillation gyro device, an oscillation circuit, a controller, and an impedance conversion circuit. The oscillation gyro device includes a piezoelectric device including a drive electrode and a detection electrode, oscillates according to a drive signal input to the drive electrode, and is capable of generating an output signal including a detection signal corresponding to a Coriolis force from the detection electrode. The oscillation circuit outputs, based on the output signal, a signal for oscillating the oscillation gyro device to the drive electrode as the drive signal. The controller controls the oscillation circuit such that the oscillation circuit outputs a drive signal that makes the output signal constant. To the impedance conversion circuit, the drive signal output from the oscillation circuit is input.

Abstract: An angular velocity sensor includes a sensor device and an amplification circuit. The sensor device generates a detection signal corresponding to an angular velocity. The amplification circuit generates both a first output signal by non-inverting amplifying the detection signal with a first gain and a second output signal by inverting-amplifying the detection signal with the first gain, and outputs the first output signal and the second output signal in order to obtain an angular velocity signal by calculating a difference between the first output signal and the second output signal.

Abstract: A method comprising the steps of continuously changing the concentrations in solution of a biomacromolecule to be crystallized and a precipitant, thereby constructing a crystal phase diagram containing a solubility curve, searching for optimum conditions of crystallization on the basis of the constructed crystal phase diagram, and performing efficient growth of the crystal of the biomacromolecule. Also disclosed is an apparatus for implementing the method.

Abstract: Vibration gyro circuitry, a vibration gyro unit, and a method for detecting a vibration gyro output, which enable detection of a rotational angular velocity with high sensitivity, are provided. The circuitry and the unit includes a differential amplifier circuit (4) for outputting a signal Vda corresponding to a difference (Vgl?Vgr) between output signals of two detection pieces of a vibration gyro (31), a synchronous detection circuit (5) for synchronously detecting the output signal Vda of the differential amplifier circuit (4), and a phase shift circuit for supplying to the synchronous detection circuit (5) a signal, as a timing signal Vck for the synchronous detection, which is phase-shifted with respect to a drive signal (an output signal of an adding circuit 1) Vsa supplied to the vibration gyro (31).

Abstract: A vibration type gyro sensor according to the present invention includes vibrating elements 1X and 1Y which detect angular velocities, a support substrate 2 which is electrically connected to the vibrating elements 1X and 1Y and which supports the vibrating elements 1X and 1Y, a relay substrate 4 which is electrically connected to the support substrate 2 and which includes external connection terminals 3, and buffer members 5 which are disposed between the support substrate 2 and the relay substrate 4 and which suppress transmission of strain and vibration between the support substrate 2 and the relay substrate 4. The vibration type gyro sensor is capable of stabilizing vibration characteristics without being influenced by strain and vibration.

Abstract: A detection apparatus is provided which includes a cantilever vibration gyro including a piezoelectric element having a first side provided with a drive electrode and a pair of detection electrodes sandwiching the drive electrode with predetermined gaps therebetween and a second side opposed to the first side and provided with a common electrode, which vibrates by a drive signal input between the drive electrode and the common electrode and generates a pair of detected signals corresponding to Coriolis force from the detection electrodes. The detection apparatus also includes a bias applying section for applying a bias voltage to the detection electrodes, an adding section adding the pair of detected signals, a first phase delay section delaying a phase of the detected signal obtained by the addition by a range larger than 45° and smaller than 90°, and an amplitude control section controlling the delayed detected signal to a predetermined voltage amplitude to output as the drive signal.

Abstract: Vibration gyro circuitry, a vibration gyro unit, and a method for detecting a vibration gyro output, which enable detection of a rotational angular velocity with high sensitivity, are provided. The circuitry and the unit includes a differential amplifier circuit (4) for outputting a signal Vda corresponding to a difference (Vgl?Vgr) between output signals of two detection pieces of a vibration gyro (31), a synchronous detection circuit (5) for synchronously detecting the output signal Vda of the differential amplifier circuit (4), and a phase shift circuit for supplying to the synchronous detection circuit (5) a signal, as a timing signal Vck for the synchronous detection, which is phase-shifted with respect to a drive signal (an output signal of an adding circuit 1) Vsa supplied to the vibration gyro (31).

Abstract: There is provided an oscillation type gyro sensor including an oscillation gyro device, an oscillation circuit, a controller, and an impedance conversion circuit. The oscillation gyro device includes a piezoelectric device including a drive electrode and a detection electrode, oscillates according to a drive signal input to the drive electrode, and is capable of generating an output signal including a detection signal corresponding to a Coriolis force from the detection electrode. The oscillation circuit outputs, based on the output signal, a signal for oscillating the oscillation gyro device to the drive electrode as the drive signal. The controller controls the oscillation circuit such that the oscillation circuit outputs a drive signal that makes the output signal constant. To the impedance conversion circuit, the drive signal output from the oscillation circuit is input.

Abstract: Provided is a vibration gyro sensor including: a vibration element including a piezoelectric element group which has a first side provided with a drive electrode and a detection electrode and a second side opposed to the first side and provided with a common electrode, which vibrates by a drive signal input between the drive electrode and the common electrode and generates an output signal containing a detection signal corresponding to Coriolis force from the detection electrode; a bias section applying a bias voltage to the detection electrode; an oscillation circuit outputting the signal for causing vibration of the vibration element to the drive electrode as the drive signal based on the output signal generated by the detection electrode; and a phase inversion circuit outputting an inversion signal obtained by inverting a phase of the drive signal output from the oscillation circuit to the common electrode.

Abstract: The present invention provides a drive circuit of an oscillation gyro including two piezoelectric elements formed in an oscillator, which includes an adding circuit for supplying a drive signal to one side faces of the two piezoelectric elements and adding signals obtained from the other side faces opposed to the one side faces of the piezoelectric elements, and an oscillation circuit adapted to be fed back with an addition output signal obtained by the adding circuit, wherein a sine wave signal obtained as an oscillation output of the oscillation circuit is supplied to the one side faces of the two piezoelectric elements as the drive signal. Thus, the drive circuit of the oscillation gyro which obtains the stable output with the simple configuration can be provided.

Abstract: A method comprising the steps of continuously changing the concentrations in solution of a biomacromolecule to be crystallized and a precipitant, thereby constructing a crystal phase diagram containing a solubility curve, searching for optimum conditions of crystallization on the basis of the constructed crystal phase diagram, and performing efficient growth of the crystal of the biomacromolecule. Also disclosed is an apparatus for implementing the method.

Abstract: An angular rate sensor includes: a quadratic prism-like oscillator 1a formed by laminating a substrate 2 and a piezoelectric material 3; a reference electrode 3a which is formed on one main surface 3A of two opposed surfaces of the piezoelectric material 3, the one main surface 3A being bonded to the substrate 2, and which is connected to a reference potential; at least one drive electrode 3b which is formed on the other main surface 3B of the two opposed surfaces of the piezoelectric material 3 in the longitudinal direction of the oscillator 1a, and to which a signal for oscillating the oscillator 1a is supplied; and at least a pair of detection electrodes 3c1 and 3c2 which are formed, in parallel with each other, on the other main surface 3B of the two opposed surfaces of the piezoelectric material 3 in a manner to sandwich the drive electrode 3b, and which output a signal corresponding to Coriolis force generated in the oscillator 1a.

Abstract: An angular rate sensor includes a quadratic prism-like oscillator 1a formed by laminating a substrate 2 and a piezoelectric material 3, the piezoelectric material 3 is made of piezoelectric ceramics including PZT (Lead Zirconate Titanate) as a main component, and the substrate 2 is made of a material other than PZT having physical property values equivalent to or less than PZT, which is a main component of the piezoelectric ceramics, with respect to Young's modulus, thermal expansion coefficient, and the like.

Abstract: The present invention provides a drive circuit of an oscillation gyro including two piezoelectric elements formed in an oscillator, which includes an adding circuit for supplying a drive signal to one side faces of the two piezoelectric elements and adding signals obtained from the other side faces opposed to the one side faces of the piezoelectric elements, and an oscillation circuit adapted to be fed back with an addition output signal obtained by the adding circuit, wherein a sine wave signal obtained as an oscillation output of the oscillation circuit is supplied to the one side faces of the two piezoelectric elements as the drive signal. Thus, the drive circuit of the oscillation gyro which obtains the stable output with the simple configuration can be provided.

Abstract: An angular rate sensor includes a quadratic prism-like oscillator 1a formed by laminating a substrate 2 and a piezoelectric material 3, the piezoelectric material 3 is made of piezoelectric ceramics including PZT (Lead Zirconate Titanate) as a main component, and the substrate 2 is made of a material other than PZT having physical property values equivalent to or less than PZT, which is a main component of the piezoelectric ceramics, with respect to Young's modulus, thermal expansion coefficient, and the like.

Abstract: An angular rate sensor includes: a quadratic prism-like oscillator 1a formed by laminating a substrate 2 and a piezoelectric material 3; a reference electrode 3a which is formed on one main surface 3A of two opposed surfaces of the piezoelectric material 3, the one main surface 3A being bonded to the substrate 2, and which is connected to a reference potential; at least one drive electrode 3b which is formed on the other main surface 3B of the two opposed surfaces of the piezoelectric material 3 in the longitudinal direction of the oscillator 1a, and to which a signal for oscillating the oscillator 1a is supplied; and at least a pair of detection electrodes 3c1 and 3c2 which are formed, in parallel with each other, on the other main surface 3B of the two opposed surfaces of the piezoelectric material 3 in a manner to sandwich the drive electrode 3b, and which output a signal corresponding to Coriolis force generated in the oscillator 1a.