公开(公告)号：US20200033180A1

公开(公告)日：2020-01-30

申请号：US16595593

申请日：2019-10-08

Applicant: DENSO CORPORATION

Inventor： Isao MIYAGAWA ,  Atsushi HONDA

IPC: G01F23/296 ,  G01N29/34

Abstract: A liquid level detector includes an ultrasonic sensor that emits an ultrasonic wave toward a liquid surface of liquid in a tank, a driving circuit unit that provides a driving signal to the ultrasonic sensor to emit the ultrasonic wave, a reception circuit unit that detects a reflected wave signal that corresponds to a reflected wave from a received signal received by the ultrasonic sensor, and an arithmetic control circuit unit that computes a level of the liquid surface with the reflected wave signal. The liquid level detector further includes an inclination detection unit that detects an inclination of the liquid surface relative to a virtual surface orthogonal to a direction of the ultrasonic wave and a driving condition computing circuit unit that instructs the driving circuit unit to increase a strength of the driving signal as the inclination of the liquid surface detected by the inclination detection unit increases.

公开(公告)号：US20160327424A1

公开(公告)日：2016-11-10

申请号：US15109751

申请日：2014-12-17

Applicant: DENSO CORPORATION

Inventor： Isao MIYAGAWA ,  Hiroshi HASHIMOTO

IPC: G01F23/36

CPC classification number: G01F23/363

Abstract: A liquid surface sensing device is installed in a fuel tank having an opening in a ceiling part. The opening is closed by a flange with a gasket constituted by an elastomer providing a seal between the flange and a peripheral edge of the opening. The liquid surface sensing device being assembled to the flange includes a sensing unit disposed vertically below the flange and sensing a liquid surface of a liquid, a lead wire connecting the sensing unit to an external device via the flange, and a guide bending the lead wire extending diagonally downward from the flange to form a valley portion to direct the lead wire diagonally upward.

Abstract translation: 液面感测装置安装在具有在天花板部分中的开口的燃料箱中。 开口由法兰封闭，垫圈由弹性体构成，该弹性体在凸缘和开口的周边边缘之间提供密封。 组装到凸缘的液体表面感测装置包括：垂直设置在凸缘下方并感测液体的液体表面的感测单元，经由凸缘将感测单元连接到外部设备的引线;以及引导件，弯曲导线 从凸缘向斜下方延伸以形成谷部，以将引线向对角线引导。

公开(公告)号：US20160161321A1

公开(公告)日：2016-06-09

申请号：US14901667

申请日：2014-06-30

Applicant: DENSO CORPORATION

Inventor： Isao MIYAGAWA

IPC: G01F23/38

CPC classification number: G01F23/38

Abstract: A liquid surface sensing device includes a rotational body that is made of resin and rotates according to upward and downward motion of a surface of liquid in a container, a magnet that is held by the rotational body to rotate together with the rotational body, a stationary body that is fixed to the container and rotatably bears the rotational body, and a magnetoelectric conversion element that is embedded in the stationary body and detects a magnetic field generated by the magnet to output an electric signal indicating the liquid surface. The rotational body includes a storage space that accommodates the magnet, a resilient claw that projects into the storage space and is in contact with the magnet in its resiliently deformed state to press the magnet on a storage wall for the storage space, and a projection that projects from an opposite side of the magnet toward the resilient claw in the storage space and expands to be in contact with the resilient claw.

Abstract translation: 液体表面检测装置包括：由树脂制成并根据容器内的液体表面的向上和向下运动旋转的旋转体，由旋转体保持的磁体与旋转体一起旋转，静止 固定在容器上并可旋转地承载旋转体的本体，以及嵌入固定体中的磁电转换元件，并检测由磁体产生的磁场，以输出指示液面的电信号。 旋转体包括容纳磁体的存储空间，弹性爪，其突出到存储空间中并且在其弹性变形状态下与磁体接触，以将磁体按压在用于存储空间的存储壁上，以及投影 从磁体的相对侧向储存空间中的弹性爪突出并且膨胀以与弹性爪接触。

公开(公告)号：US20160131515A1

公开(公告)日：2016-05-12

申请号：US14898981

申请日：2014-06-16

Applicant: DENSO CORPORATION

Inventor： Isao MIYAGAWA

IPC: G01F23/38

CPC classification number: G01F23/38

Abstract: A liquid-level detection device for detecting a level of a liquid surface of liquid stored in a container, includes a rotatable body that rotates in accordance with the liquid surface, a fixation body having a main body part fixed to the container and a supporting part projecting from the main body part in an axial direction along a rotation axis of the rotatable body to rotatably support the rotatable body, a pair of magnet parts held by the rotatable body at arrangement positions with the rotation axis therebetween to generate a magnetic flux passing through the supporting part, and a detecting part having an element part disposed inside the supporting part to output a detection result according to a density of a magnetic flux passing through the element part. The rotatable body includes an exposed surface that is located outward of the supporting part and the pair of magnet parts in the axial direction and that is exposed into the container. An erected wall rising up from the exposed surface outward in the axial direction is provided between two projection regions which are obtained by projecting the pair of magnet parts onto the exposed surface outward in the axial direction.

Abstract translation: 一种液位检测装置，用于检测存储在容器中的液体液面的高度，包括：一根据液面转动的旋转体;固定体，其具有固定在容器上的主体部分和支撑部分 从主体部分沿着轴向方向沿着可旋转体的旋转轴线突出，以可旋转地支撑旋转体，一对磁体部件，其被旋转体保持在其旋转轴线之间的布置位置，以产生通过的磁通量 所述支撑部分和检测部分具有设置在所述支撑部分内部的元件部分，以根据穿过所述元件部分的磁通密度来输出检测结果。 旋转体包括位于支撑部分外侧的暴露表面和沿轴向方向的一对磁体部分，并暴露于容器中。 通过将一对磁体部分沿轴向向外突出而获得的两个突起区域之间设置有从轴向外露的表面向上突出的竖立壁。

公开(公告)号：US20200033181A1

公开(公告)日：2020-01-30

申请号：US16595597

申请日：2019-10-08

Applicant: DENSO CORPORATION

Inventor： Isao MIYAGAWA ,  Atsushi HONDA

IPC: G01F23/296 ,  G01N29/34

Abstract: A liquid level detector includes an ultrasonic sensor that emits an ultrasonic wave toward a liquid surface of liquid in a tank, a driving circuit unit that provides a driving signal to the ultrasonic sensor to emit the ultrasonic wave, a reception circuit unit that detects a reflected wave signal that corresponds to a reflected wave from a received signal received by the ultrasonic sensor, and an arithmetic control circuit unit that computes a level of the liquid surface with the reflected wave signal. The liquid level detector further includes a temperature detection unit that detects a temperature of the liquid and a driving condition computing circuit unit that instructs the driving circuit unit to increase a strength of the driving signal as the temperature of the liquid that is detected by the temperature detection unit decreases.

公开(公告)号：US20170322066A1

公开(公告)日：2017-11-09

申请号：US15524652

申请日：2015-11-23

Applicant: DENSO CORPORATION

Inventor： Hiroshi HASHIMOTO ,  Isao MIYAGAWA

IPC: G01F23/36 ,  G01F23/38

CPC classification number: G01F23/36 ,  G01F23/38

Abstract: A liquid level detection device is provided with a fixed body and a rotating body, and includes a float and an arm. The arm has an insertion portion to be inserted in the rotating body and an extending portion extending straight and bent relative to the insertion portion. The rotating body has an insertion hole in which the insertion portion is inserted in an insertion direction, a holding portion having a receiving opening receiving the extending portion in an intersecting direction intersecting with the insertion direction and holding the extending portion received by the receiving opening, and a stopper releasing the receiving opening by moving in the insertion direction due to elastic deformation from a blocking state in which a blocking portion blocks the receiving opening. The stopper has a sliding surface portion facing an opposite direction to the insertion direction, on which the extending portion is allowed to slide. A thickness of the blocking portion in the insertion direction at a tip end of the sliding surface portion is greater than a diameter of the extending portion.

公开(公告)号：US20160153823A1

公开(公告)日：2016-06-02

申请号：US14904341

申请日：2014-07-09

Applicant: DENSO CORPORATION

Inventor： Isao MIYAGAWA

IPC: G01F23/38

CPC classification number: G01F23/38

Abstract: A liquid-level detection device includes a rotatable body that rotates in accordance with a liquid surface, a fixation body that includes a main body part fixed to a container and a supporting part projecting from the main body part in an axial direction along a rotation axis of the rotatable body to rotatably support the rotatable body, a pair of magnet parts that are held by the rotatable body in an arrangement positioning the supporting part therebetween and that generates a magnetic flux passing through the supporting part, and a detecting part that includes a magnetoelectric conversion device disposed in the supporting part and that outputs a detection result according to a density of the magnetic flux passing through the magnetoelectric conversion device. The rotatable body includes a magnetic shield member entirely covering a projection region of a space located between the pair of magnet parts, which is projected outward in the axial direction, to limit leakage of the magnetic flux. The magnetic shield member is located outward of the supporting part and the pair of magnet parts in the axial direction to include an exposed surface which is exposed into the container.

Abstract translation: 液面检测装置包括：根据液面旋转的旋转体;固定体，其包括固定在容器上的主体部;以及支撑部，其沿轴向沿着旋转轴从主体部突出; 所述可旋转体以可旋转的方式支撑所述可旋转体，所述一对磁体部分被所述可旋转体保持，使所述支撑部位在其间定位，并且产生穿过所述支撑部的磁通量;以及检测部， 磁电转换装置设置在支撑部分中，并且根据通过磁电转换装置的磁通密度输出检测结果。 旋转体包括一个完全覆盖位于沿轴向向外突出的一对磁体部分之间的空间的突出区域的磁屏蔽件，以限制磁通量的泄漏。 磁屏蔽构件位于支撑部分的外侧，并且一对磁体部件沿轴向方向包括暴露于容器中的暴露表面。