Toa Corporation and Hiroshima University | Date: 2015-07-29
Provided are a quantification method and a quantification device capable of performing measurement at high sensitivity and high accuracy on a sample that contains sodium ions such as a biochemical sample, a pharmaceutical product, and food. The quantification method includes a calibration curve preparing step to measure a standard solution, which has been prepared by adding sodium ions so that a sodium ion content of the standard solution is equaled to a sodium ion content of a sample to be measured with a method employing a reaction that activates a limulus reagent and/or a biochemical luminescent reaction caused by ATP, luciferin, and luciferase, and to prepare a calibration curve that represents a relation between a measurement value and an amount of a component to be measured; a sample measuring step to measure the sample to be measured with a method being the same as that used in the calibration curve preparing step; and a quantifying step to find, by using the calibration curve, an amount of the component to be measured in the sample to be measured from a measurement value in the sample measuring step.
Toa Corporation | Date: 2015-04-22
[Object] To provide a speaker apparatus that can detect miswiring to a speaker unit or trouble of a speaker unit itself. [Means for Settlement] The speaker apparatus is configured to include: two or more speaker units 11 that are arranged in a speaker housing 10; a sensor microphone 12 that is arranged in the speaker housing 10 and outputs a sound collection signal 6; a target unit selection part 20 that selects any one of the speaker units 11 as a target unit; a sound signal supply part 21 that supplies an external sound signal 4 to the target unit; and an error detection part 25 that provides an error output on the basis of the external sound signal 4 and the sound collection signal 6.
Toa Corporation | Date: 2013-03-06
To provide a speaker device that can form a substantially uniform sound field over a range from a long distance to a short distance without significantly increasing a calculation load. A plurality of FIR filters 21 to 2n perform delay control of respective speakers so as to increase a delay time difference between adjacent speakers 51 to 5n in a line array speaker 5 toward one end of the line array speaker 5, and thereby over a wide range from a long distance to a short distance, a sound filed 12 is formed. Also, by adding a common shift delay time Dc to filter coefficients for the FIR filters 21 to 2n, the delay time difference between adjacent speakers 51 to 5n is made less than a sampling period of a sound signal to form a wide and uniform sound field 12.
Toa Corporation | Date: 2016-01-27
The present invention provides a trough used for feeding power to a traveling body in a noncontact manner, a paved structure, and a method of constructing the paved structure. The trough 1a used for a paved structure 5 feeding power to a power receiver provided in a traveling body 2 through an electromagnetic wave, includes: a trough body 10a having a trough depression 100 extending in the direction in which the traveling body 2 runs; a magnetic member 11 laid in the trough depression 100; a power feeding body 12 laid on the magnetic member 11 to feed power to the power receiver through an electromagnetic wave; and a power feeding body protector 13 laid in the trough depression 100 to cover the power feeding body 12.
Toa Corporation | Date: 2013-04-24
An audio signal from an audio signal source 2 is amplified in an amplifier 4, and the amplified audio signal is supplied through a loudspeaker line 6 to a plurality of loudspeakers 8 connected in parallel with each other. A test signal from a DSP 10 containing one or both of a frequency near the lowest frequency of the human audio frequency band and a frequency near the highest frequency, is combined with the audio signal in a combiner 13 and supplied to the loudspeaker line 6. Output signals of a current detecting circuit 14 and a voltage detecting circuit 16 disposed in the output of the amplifier 4 are supplied to a DSP 10 to analyze frequency components of the test signal, and a composite impedance of the loudspeakers 8 and the loudspeaker line 6 is computed based on the frequency component analysis. The DSP 10 compares the composite impedance with a threshold value to detect line breakage or decrease in impedance of the loudspeaker line.
Toa Corporation | Date: 2015-02-04
Provided is an oil film detection device capable of detecting an oil film reliably and accurately even when separated by a distance from a water surface (detection target surface). Provided is an oil film detection device including, in a detector W, an accommodating portion 5 which accommodates at least a light source 1, a concave mirror 2, and a light-receiving portion 4 , and a window 6 which closes the accommodating portion 5 in a watertight manner, for detecting an oil film existing on a detection target surface owing to that light is radiated from the light source 1 toward a detection target surface, reflection light from the detection target surface is collected by the concave mirror 2 and received by the light-receiving portion 4. Here, the light source 1 is arranged above the concave mirror and emits light approximately in the vertical direction. The concave mirror 2 is arranged so that an optical axis of the concave mirror 2 is perpendicular to the horizontal direction and has a through-hole 3, as a position deviated from the optical axis of the concave mirror 2, through which emitted light from the light source 1 passes. The light-receiving portion 4 is arranged at a focal position on the optical axis of the concave mirror 2.
Toa Corporation | Date: 2016-03-30
The present invention is to provide a paved structure capable of feeding power to a traveling body in a noncontact manner. The paved structure 1 feeding power to a power receiver 3 provided in a traveling body 2 through an electromagnetic wave, includes: a depression 10 extending in the direction in which the traveling body 2 runs; a magnetic member 11 laid in the depression 10; a power feeding body 12 laid on the upper surface of the magnetic member 11 to feed power to the power receiver 3 through an electromagnetic wave; and a power feeding body protector 13 laid in the depression 10 to cover the power feeding body 12.
Toa Corporation | Date: 2013-06-11
Problem to be Solved To effectively operate a microphone array provided with a sound source position estimating function. Solution A microphone control system of the present invention is realized by the use of a tablet-type computer, for example. On the display of the control system, a two-dimensional simulation diagram 302, for example, simulating the space in which the microphone array is disposed. An array mark 304 simulating the exterior shape of the microphone array is displayed on the simulation diagram 302. Further, a sound source mark 316 indicating the position of the sound source estimated by the microphone array is displayed on the simulation diagram 302. Thus, an operator can intuitively find the position of the sound source in the space in which the microphone array is disposed, by referring to the simulation diagram 302, the array mark 304 and the sound source mark 316 displayed on the simulation diagram. Thus, the usage of the microphone array is improved.
Toa Corporation | Date: 2015-12-16
Provided is a loudspeaker system capable of easily determining control parameters for controlling the directional characteristics of a speaker set including two or more speaker units. The loudspeaker system is configured to include: a speaker set 11 including two or more speaker units 2; a camera 15 adapted to photograph an acoustic space of the speaker set 11; a monitor 22 adapted to display a camera image 30 photographed by the camera 15; and a directional control parameter generating part 24 adapted to generate directional control parameters providing the directional characteristics of the speaker set 11. The directional control parameter generating parts 24 includes: a target position designation part 101 adapted to, on the basis of user operations, designate target positions 32 on the camera image 30; a directional control angle calculation part 103 adapted to, on the basis of the target positions 32, obtain directional control angles with respect to a front direction of the speaker set 11; and a directional control parameter determination part 104 adapted to, on the basis of the directional control angles , determine the directional control parameters.
Kurita Water Industries Ltd. and Toa Corporation | Date: 2014-05-12
Provided is a device for measuring the concentration of a dissolved component, whereby the concentration of a plurality of types of dissolved components in water can be measured easily and with good precision. A device for measuring the concentration of a dissolved component has: a cell assembly 3 in which a plurality of cells 1 are connected by a joint member 2 and integrated, and a measurement reagent is accommodated in each of the cells 1; and a measuring main body 5 having a measurement unit (light-emitting element 8 and light-receiving element 9) for measuring transmittance and absorbance, the cells 1 of the cell assembly 3 being inserted into the measurement unit. A cap 4 is detachably mounted to each cell 1.