LASER GAS ANALYZER
First Claim
1. A laser gas analyzer comprising:
- a light source unit including a diode laser that irradiates a gas to be measured with laser light while varying a wavelength thereof;
a detection unit including a light receiving element that detects the laser light having passed through the gas to be measured,a gain-variable amplifier into which an output signal of the light receiving element is input,an A/D converter into which the output signal of the amplifier is input, andan arithmetic processing unit that performs a concentration analysis of the gas to be measured based on output data of the A/D converter;
a peak-to-peak detector that detects a peak-to-peak value of the output data of the A/D converter each time the wavelength of the laser light irradiated from the diode laser changes; and
a gain adjustment unit that, when the output signal of the peak-to-peak detector deviates from a preset threshold, adjusts the gain of the amplifier in a direction of bringing the output signal back to within the threshold.
1 Assignment
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Accused Products
Abstract
A laser gas analyzer which can include a light source unit including a diode laser that irradiates a gas to be measured with laser light while varying a wavelength thereof; a detection unit including a light receiving element, a gain-variable amplifier into which an output signal of the light receiving element is input, an A/D converter into which the output signal of the amplifier is input, and an arithmetic processing unit that performs a concentration analysis of the gas to be measured; a peak-to-peak detector that detects a peak-to-peak value of the output data of the A/D converter each time the wavelength of the laser light irradiated from the diode laser changes; and a gain adjustment unit that, when the output signal of the peak-to-peak detector deviates from a preset threshold, adjusts the gain of the amplifier in a direction of bringing the output signal back to within the threshold.
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Citations
4 Claims
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1. A laser gas analyzer comprising:
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a light source unit including a diode laser that irradiates a gas to be measured with laser light while varying a wavelength thereof; a detection unit including a light receiving element that detects the laser light having passed through the gas to be measured, a gain-variable amplifier into which an output signal of the light receiving element is input, an A/D converter into which the output signal of the amplifier is input, and an arithmetic processing unit that performs a concentration analysis of the gas to be measured based on output data of the A/D converter; a peak-to-peak detector that detects a peak-to-peak value of the output data of the A/D converter each time the wavelength of the laser light irradiated from the diode laser changes; and a gain adjustment unit that, when the output signal of the peak-to-peak detector deviates from a preset threshold, adjusts the gain of the amplifier in a direction of bringing the output signal back to within the threshold. - View Dependent Claims (2, 3, 4)
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Specification