Liquid level sensor
AssigneesHONG FU JIN PRECISION INDUSTRY (ShenZhen) CO., LTD., Hon Hai Precision Industry Co., Ltd.
InventorsTian-Feng Huang, Wen-Li Wang, Hao-Chung Lee
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Abstract
A quartz glass liquid level sensor includes a support frame, a light masking plate, a quartz glass tube, and a sensor module. The light masking plate is movably mounted on the support frame. The quartz glass tube is movably mounted to the support frame. One end of the quartz glass tube is securely fixed to the light masking plate. The sensor module is mounted on the support frame, for sensing a position of the light masking plate relative to the support frame.
Claims14
A quartz glass liquid level sensor for sensing a liquid level of a liquid in a container, the sensor comprising:
- a support frame;
- a light masking plate movably mounted on the support frame;
- a quartz glass tube movably mounted to the support frame, one end of the quartz glass tube being securely fixed to the light masking plate;
- a sensor module mounted on the support frame, for sensing a position of the light masking plate relative to the support frame, and comprising:
- a first photoelectric sensor mounted on the support frame, and
- a second photoelectric sensor mounted on the support frame and spaced from the first photoelectric sensor, a distance between the first photoelectric sensor and the second photoelectric sensor being equal to a distance between a lowest level line and a highest level line defined on the container;
- and
- a control module coupled to the first photoelectric sensor and the second photoelectric sensor, and configured to receiving sensing results obtained from the first photoelectric sensor and the second photoelectric sensor;
- wherein when the liquid level of the liquid reaches the lowest level line, the light masking plate contacts with the first photoelectric sensor, and a light emitted by the first photoelectric sensor is masked by the light masking plate, such that the control module receives a first sensing result and controls to supply the liquid into the container;
- wherein when the liquid level of the liquid reaches the highest level line, the light masking plate contacts with the second photoelectric sensor, and a light emitted by the second photoelectric sensor is masked by the light masking plate, such that the control module receives a second sensing result and controls to stop supplying the liquid into the container.
A quartz glass liquid level sensor for sensing a liquid level of a liquid in a container, the quartz glass liquid level sensor comprising:
- a support frame;
- a light masking plate movably mounted on the support frame;
- a quartz glass tube floating on the liquid and movably mounted to the support frame, one end of the quartz glass tube being securely fixed to the light masking plate;
- a sensor module mounted on the support frame, for sensing a position of the light masking plate relative to the support frame, and comprising:
- a first photoelectric sensor mounted on the support frame, and
- a second photoelectric sensor mounted on the support frame and spaced from the first photoelectric sensor, a distance between the first photoelectric sensor and the second photoelectric sensor being equal to a distance between a lowest level line and a highest level line defined on the container;
- and
- a control module coupled to the first photoelectric sensor and the second photoelectric sensor, and configured to receiving sensing results obtained from the first photoelectric sensor and the second photoelectric sensor;
- wherein when the liquid level of the liquid reaches the lowest level line, the light masking plate contacts with the first photoelectric sensor, and light emitted by the first photoelectric sensor is masked by the light masking plate, such that the control module receives a first sensing result and controls to supply the liquid into the container;
- wherein when the liquid level of the liquid reaches the highest level line, the light masking plate contacts with the second photoelectric sensor, and light emitted by the second photoelectric sensor is masked by the light masking plate, such that the control module receives a second sensing result and controls to stop supplying the liquid into the container.
Dependencies are inferred from the claim text.