Abstract: A particulate matter detection device (100) includes a detection device body (1) extending in one direction and having at least one through-hole (2) that is formed at one end (1a), at least one pair of electrodes buried in the wall of the body (1) that defines the through-hole (2), and covered with a dielectric, lines respectively extending from the pair of electrodes toward the other end (1b), a takeout lead terminal (12a) of one electrode of the pair of electrodes disposed on the surface of the other end (1b), a takeout lead terminal (11a) of the other electrode of the pair of electrodes between one end (1a) and the other end (1b), and an electric wire (21) provided with an electric wire securing member (31) at its tip portion, and bonded to the takeout lead terminal (11a) through the electric wire securing member (31).

Abstract: A particulate matter detection device (100) includes a first electrode (10) that includes a conductive section (12) and a dielectric (14) that covers the conductive section (12), and a second electrode (20) that is disposed opposite to the first electrode (10) at an interval of 0.3 to 3.0 mm. Charged particulate matter contained in a fluid that passes through the space between the first electrode (10) and the second electrode (20), or particulate matter that is contained in a fluid and charged by a discharge that occurs due to application of a voltage between the electrodes (10) and (20) is electrically adsorbed on at least one of the electrodes (10) and (20), and the particulate matter adsorbed on the electrodes (10) and (20) is detected by measuring a change in electrical properties of the first electrode (10), or a change in electrical properties of the electrodes (10) and (20).

Abstract: A particulate matter detection device (100) includes a detection device body (1) having at least one through-hole (2) formed at one end of the body (1), a pair of electrodes (11, 12) buried in the wall of the body (1) defining the through-hole (2), and covered with a dielectric, and a heating section (13) disposed in the body (1), and adjusting the temperature of the wall defining the through-hole (2), the heating section (13) being covered with a protective layer (15) formed of alumina having a purity of 95% or more, and the particulate matter detection device allowing a particulate matter contained in a fluid that flows into the through-hole (2) to be electrically adsorbed on the wall surface of the through-hole (2), and detecting the mass of the particulate matter adsorbed on the wall surface by measuring a change in electrical properties of the wall.

Abstract: A tubular structure for fixing particulate matter detection device 100 includes a tubular first holding tube 1 having a fixing structure portion 4 at a first end 2; and a tubular second holding tube 11 having one end 12 fixed to a second end 3 so that the second holding tube is coaxial with the first holding tube 1. A particulate matter detection device 21, prolonged in one direction and having a detecting portion 22 of a particulate matter and a takeout portion 23 of a wiring line is disposed in the tubular structure so that the detecting portion 22 projects to the outside from the first end 2 and so that the takeout portion 23 is positioned in the second holding tube, and the particulate matter detection device is fixed to a pipe by the fixing structure portion 4 so that the detecting portion 22 positioned in the pipe.

Abstract: A PM sensor is provided having high responsiveness and capable of long term detection. A PM sensor 11 includes a sensor element 12 that has particulate collection electrodes 123A, 128A to which a particulate collection voltage for causing particulate matter contained in exhaust to adhere to a sensor element 12 is applied, and measurement electrodes 127A, 127B to which a measurement voltage for measuring an electrical characteristic of the sensor element 12 is applied, in which, after a particulate collection voltage is applied to the particulate collection electrodes 123A, 128A, application of the particulate collection voltage is stopped in response to a predetermined condition being satisfied, the measurement voltage is applied to the measurement electrodes 127A, 127B, and the electrical characteristic of the sensor element 12 is measured.

Abstract: A particulate matter detection device including a main body which has one end provided with a through hole; a pair of electrodes embedded in a wall through which the through hole is formed, and covered with a dielectric material; wires extending from the electrodes to the other end of the main body; and a ground electrode provided at a position sandwiched between the wires. The device can electrically adsorb, on the wall surface of the through hole, a charged particle in a fluid flowing into the through hole, or a particle charged by electric discharge caused in the through hole by applying a voltage across the pair of electrodes. The device can measure the changes of the electric properties of the wall through which the through hole is formed, thereby detecting particles adsorbed on the wall surface of the through hole.

Abstract: A particulate matter detection device 100 includes a first electrode 1 whose one surface is covered with an inter-electrode dielectric material 4; a second electrode 2 disposed on the side of the one surface of the first electrode 1, to perform the discharge of electricity by a voltage applied between the first electrode 1 and the second electrode; and a pair of measurement electrodes 5, 15 disposed on the surface of the inter-electrode dielectric material 4 so as to face each other; characteristic measurement means 3 for measuring electric characteristics between the pair of measurement electrodes 5 and 15; and particulate matter amount calculation means 13 for obtaining the amount of the particulate matter 11 collected by the surface of the inter-electrode dielectric material 4, based on the change amount of the electric characteristics.