A particle sensor for detecting particles in a flow of a measuring gas for detecting soot particles in an exhaust gas channel of a burner or of an internal combustion engine. The particle sensor includes a device for generating or for supplying laser light, a device for focusing laser light, and a device for detecting or transferring thermal radiation. The particle sensor includes at least one optical access, which separates an area exposed to the measuring gas from an area facing away from the measuring gas not exposed to the measuring gas, the device for generating or supplying laser light and/or the device for detecting or for transferring thermal radiation being situated in the area facing away from the measuring gas, wherein the particle sensor removes a sub-flow from the measuring gas flow and supplies it to the laser focus and further fluidically shields the optical access from the sub-flow.

A method for detecting particles or aerosol in a flowing fluid, using the principle of laser-induced incandescence. The method includes the following steps: a. focusing a laser light originating from a laser in a spot; b. conducting a fluid which includes particles or aerosol through the spot; c. detecting a thermal radiation originating from the spot with the aid of a detector; and d. evaluating a variable which is provided by the detector and characterizes the detected thermal radiation within time intervals, the duration of the time intervals being dependent on a velocity of the fluid.

A method, apparatus and/or system for measuring engine oil consumption using laser induced breakdown spectroscopy.

Methods and systems are provided for a particulate matter sensor. In one example, the particulate matter sensor may include a light source, a waveguide aligned with the light source to receive incident light from the light source, and a photodetector positioned to receive light the incident light from the waveguide. The incident light may be reflected off a reflective surface of the waveguide more than one time to generate a plurality of evanescent waves. The plurality of evanescent waves may interact with particulate matter in exhaust gas, causing the incident light to be attenuated.

The present disclosure provides a method and system for detecting exhaust emissions of a vehicle equipped with an ignition engine based on big data of remote sensing. The system includes: a vehicle emission measuring instrument, a host computer, an information display instrument, a vehicle driving state tester, a weather monitor, a license plate camera and a vehicle emission monitoring platform. The vehicle emission measuring instrument, the information display instrument, the vehicle driving state tester, the weather monitor and the license plate camera communicate with the host computer. The host computer is connected to the vehicle emission monitoring platform via the Internet. The present disclosure acquires pollutant concentrations in the vehicle emissions through the detection system, divides a vehicle specific power (VSP) into multiple bins, performs statistical analysis and evaluation on the vehicle emissions according to different vehicle types, and determines high-emission vehicles.

A fluid quality sensor for measuring a quality of a fluid comprises a measurement section mounted to an output side of a pump for the fluid.

The invention discloses a device for simulating an evolution process of an internal combustion engine exhaust particle flow for reducing automotive emissions, and the device comprises an exhaust source; an exhaust channel, comprising a plurality of sections of cylindrical tubes with specified length that are fixedly connected; a soluble organic compound generator, used to produce soluble organic compounds; a carbon particle generator, used to produce carbon particles. The device for simulating the evolution process of an internal combustion engine exhaust particle flow for reducing automotive emissions has the advantages of simple structure and low cost; controls the mixing concentration of soot particles and soluble organic compounds through various adjustment methods to obtain a suitable mixed aerosol, so as to better simulate the exhaust particle flow of an internal combustion engine.

The invention discloses a device for simulating an evolution process of an internal combustion engine exhaust particle flow for reducing automotive emissions, and the device comprises an exhaust source; an exhaust channel, comprising a plurality of sections of cylindrical tubes with specified length that are fixedly connected; a soluble organic compound generator, used to produce soluble organic compounds; a carbon particle generator, used to produce carbon particles. The device for simulating the evolution process of an internal combustion engine exhaust particle flow for reducing automotive emissions has the advantages of simple structure and low cost; controls the mixing concentration of soot particles and soluble organic compounds through various adjustment methods to obtain a suitable mixed aerosol, so as to better simulate the exhaust particle flow of an internal combustion engine.

An optical device for detecting a first chemical species and a second chemical species contained in a specimen, which includes: a first optical sensor, which may be optically coupled to an optical source through the specimen and is sensitive to radiation having a wavelength comprised in a first range of wavelengths; and a second optical sensor, which may be optically coupled to the optical source through the specimen and is sensitive to radiation having a wavelength comprised in a second range of wavelengths, different from the first range of wavelengths.

A device that includes a conduit, a first window, a second window, a first catalyzed layer, a second catalyzed layer, an optical source, and an optical detector is disclosed. The conduit may be configured to receive an exhaust gas. The first catalyzed layer may be disposed on the first window and the second catalyzed layer may be disposed on the second window. The first catalyzed layer and the second catalyzed layer may be configured to cause a reaction with soot in the exhaust gas at an activation temperature to reduce accumulation of the soot on the first window and the second window. The optical source may be configured to emit a beam of light into the conduit through the first window. The optical detector may be configured to receive at least a portion of the beam of light through the second window.