Abstract: A particulate matter detection device of the present invention includes a plate-like element base material, and a pair of measurement electrodes arranged in the element base material, each of the measurement electrodes is a combteeth-like electrode including a plurality of planarly arranged combteeth portions, and a comb spine portion which connects the plurality of combteeth portions of each of the measurement electrodes to one another at one end of each of the plurality of combteeth portions, the combteeth portions of the measurement electrodes are arranged to engage with each other with a space being left therebetween, and the comb spine portion of at least one of the measurement electrodes is covered with a comb spine covering portion made of a dielectric material.

Abstract: A particulate matter detection device includes a plate-like element base material including, on one surface thereof, a formed recess portion to collect a particulate matter; a pair of measurement electrodes arranged on the bottom surface side of the recess portion of the element base material; and a high-voltage dust collection electrode embedded in a wall which forms the recess portion of the element base material on the one surface side of the element base material from a position where the pair of measurement electrodes are arranged. An electric field is generated from the high-voltage dust collection electrode to the pair of measurement electrodes, to collect, on the bottom surface side of the recess portion, the particulate matter flowing along the element base material, and a change of electric characteristics between the pair of measurement electrodes is measured to detect the particulate matter collected on the recess portion.

Abstract: A PM sensor is provided having high responsiveness and capable of long term detection. A PM sensor includes a sensor element that has particulate collection electrodes to which a particulate collection voltage for causing particulate matter contained in exhaust to adhere to a sensor element is applied, and measurement electrodes to which a measurement voltage for measuring an electrical characteristic of the sensor element is applied, in which, after a particulate collection voltage is applied to the particulate collection electrodes 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 and the electrical characteristic of the sensor element is measured.

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: An ignition component 100 provided with a center electrode 30 and an insulator 32, in which the insulator 32 is formed of a large-diameter portion 33 and a small-diameter portion 34, the large-diameter portion 33 of the insulator 32 is inserted into the plug insertion hole 21 of the cylinder head 20 of the internal combustion engine, and a stepped portion 35 between the large-diameter portion 33 and the small-diameter portion 34 of the insulator 32 is pressed onto and fixed to the side of the cylinder head 20 of the internal combustion engine so that the insulator 32 is attached to the cylinder head 20 of the internal combustion engine is provided.

Abstract: A tubular structure for fixing a particulate matter detection device including a tubular first holding tube having a fixing structure portion at a first end; and a tubular second holding tube having one end fixed to a second end so that the second holding tube is coaxial with the first holding tube. The particulate matter detection device is prolonged in one direction and having a detecting portion for particulate matter, with a takeout portion of a wiring line disposed in the tubular structure so that the detecting portion projects to the outside from the first end and so that the takeout portion is positioned in the second holding tube, and with the particulate matter detection device fixed to a pipe by the fixing structure portion so that the detecting portion is positioned in the pipe.

Abstract: A particulate matter detection device including a first electrode having one surface covered with a dielectric material; a second electrode which is disposed on the side of the one surface of the first electrode via a space where a gas including particulate matter flows and which performs one or both of the formation of a discharge and an electric field by a voltage applied between the first electrode and the second electrode; a pair of measurement electrodes disposed on the surface of the dielectric material so as to face each other; and a protective film disposed on the surfaces of the pair of measurement electrodes and having a volume resistivity of 10 ?cm to 1012 ?cm, where the variate of the electric properties between the pair of measurement electrodes is measured, and the amount of the collected particulate matter can be obtained.

Abstract: A particulate matter detection device including a detection device 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 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 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.

Abstract: A particulate matter detection device includes a plate-like element base material including, on one surface thereof, a formed recess portion to collect a particulate matter; a pair of measurement electrodes arranged on the bottom surface side of the recess portion of the element base material; and a high-voltage dust collection electrode embedded in a wall which forms the recess portion of the element base material on the one surface side of the element base material from a position where the pair of measurement electrodes are arranged. An electric field is generated from the high-voltage dust collection electrode to the pair of measurement electrodes, to collect, on the bottom surface side of the recess portion, the particulate matter flowing along the element base material, and a change of electric characteristics between the pair of measurement electrodes is measured to detect the particulate matter collected on the recess portion.

Abstract: A particulate matter detection device of the present invention includes a plate-like element base material, and a pair of measurement electrodes arranged in the element base material, each of the measurement electrodes is a combteeth-like electrode including a plurality of planarly arranged combteeth portions, and a comb spine portion which connects the plurality of combteeth portions of each of the measurement electrodes to one another at one end of each of the plurality of combteeth portions, the combteeth portions of the measurement electrodes are arranged to engage with each other with a space being left therebetween, and the comb spine portion of at least one of the measurement electrodes is covered with a comb spine covering portion made of a dielectric material.

Abstract: A particulate matter detection device of the present invention includes a plate-like element base material, and a pair of measurement electrodes arranged in the element base material, each of the measurement electrodes is a combteeth-like electrode including a plurality of planarly arranged combteeth portions, and a comb spine portion which connects the plurality of combteeth portions of each of the measurement electrodes to one another at one end of each of the plurality of combteeth portions, the combteeth portions of the measurement electrodes are arranged to engage with each other with a space being left therebetween, and the comb spine portion of at least one of the measurement electrodes is covered with a comb spine covering portion made of a dielectric material.

Abstract: A particulate matter detecting device includes a sensor element having a measurement electrode and a heater electrode provided on one end portion of a plate-like element substrate, a cylindrical lead terminal cover member having the sensor element inserted into a penetration portion that penetrates in an axial direction thereof so that the sensor element is held inside a detecting device external cylinder, and the detecting device external cylinder. The penetration portion includes a first penetration portion having a size corresponding to that of a cross section of the sensor element, and a second penetration portion with a larger cross section perpendicular to the penetration direction than that of the first penetration portion. An electrical insulating sealant is filled in a gap between the second penetration portion and the sensor element inserted into the second penetration portion so that the sensor element and the lead terminal cover member are fixed.

Abstract: The particulate matter detecting device of the present invention includes: a sensor element having a plate-shaped element substrate, at least one pair of measurement electrodes arranged on one end face of this element substrate, a heater electrode arranged on either of end faces or inside of the element substrate, and a plurality of lead terminals arranged on the other end face of the element substrate and electrically connected to each of the measurement electrodes and the heater electrode; and an outer sheath body having a columnar barrel portion and a barrel-portion end face arranged on one end face of the barrel portion, in which the sensor element is arranged in the barrel portion of the outer sheath body such that the pair of measurement electrodes is exposed from an open frontal area of the barrel-portion end face.

Abstract: There is provided an exhaust gas treatment apparatus 1a including: a tubular body 10 and a discharge electrode 12 disposed inside the tubular body. The tubular body 10 has a shape where an inner diameter of the tubular body 10 is gradually reduced in a predetermined range from a face 25 which contains a central point 24x of generation of corona discharge 24 generated by the discharge electrode 12 and which is perpendicular to the flow passage toward the downstream side 44 of the flow passage.

Abstract: An exhaust gas treatment apparatus 1a of the present invention includes: a tubular body 10, a discharge electrode 12 disposed inside the tubular body 10, and a stick-shaped dust collection electrode 14. The number of the particulates 22 suspended in the exhaust gas 20 is decreased by charging the particulate matter 22 contained in the exhaust gas passing through the tubular body 10 by corona discharge 24 caused by the discharge electrode 12, collecting the charged particulate matter 22a on the inner wall face 10a of the tubular body 10 by the electric field 26 generated by the dust collection electrode 14 to agglomerate the particulate matter 22a, and allowing the agglomerated particulate matter 22b to scatter again.

Abstract: A particulate matter detection device (100) includes a detection device body (1) that has at least one through-hole (2) that is formed at one end of the body (1), a high-voltage electrode (11) and a low-voltage electrode (12) that are buried in the wall of the body (1), a high-voltage takeout lead terminal (11a) that is disposed on the surface of the body (1), a high-voltage takeout lead terminal insulating member (20) that is disposed to cover at least an area in which the lead terminal (11a) is disposed, and a detection device outer tube (30) that is disposed to cover the lead terminal insulating member (20), the device (100) being configured so that particulate matter can be electrically adsorbed on the wall surface of the through-hole (2), and this particulate matter can be detected by measuring a change in electrical properties of the wall that defines the through-hole (2).

Abstract: A particulate matter detection device 100 includes a first electrode 1 and having one surface covered with a dielectric material; a second electrode 2 which is disposed on the side of the one surface of the first electrode 1 via a space where a gas including a particulate matter flows and which performs one or both of the formation of discharge and an electric field by a voltage applied between the first electrode 1 and the second electrode; a pair of measurement electrodes 5, 15 disposed on the surface of the dielectric material so as to face each other; and a protective film 21 disposed on the surfaces of the pair of measurement electrodes and having a volume resistivity of 10 ?cm to 1012 ?cm, and the variate of electric properties between the pair of measurement electrodes is measured, whereby the amount of the collected particulate matter can be obtained.

Abstract: A protective equipment 100 for the particulate matter detection device includes a bottomed cylindrical protective equipment main body 4 having a cylindrical trunk portion 1 and a bottom portion 3 which closes one end 2 of the trunk portion 1, and there are formed a gas introduction port 5 which extends through a wall of the trunk portion 1 and through which the gas can flow from the outside to the inside and a gas discharge port 6 which extends through a wall of the trunk portion 1 at a position facing the gas introduction port 5 and through which the gas can be discharged from the inside to the outside.