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Liquid level and temperature sensor

A temperature sensor and liquid level sensing technology, applied in the field of sensors, can solve the problems that the integrated detection of liquid level signal and temperature signal cannot be realized, the liquid level sensor switch and the temperature sensitive switch are connected in series, and the processing and installation process of the sensor is complicated. , to achieve the effect of saving signal detection cost, saving engineering construction cost and simple structure

Inactive Publication Date: 2009-12-16
SHENYANG FIRE RES INST OF THE MIN OF PUBLIC SECURITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] At present, when detecting the liquid level or temperature of fire water tanks, fire water tanks, automobile water tanks, fuel tanks or oil tanks, liquid level detection and temperature detection are an important part of industrial applications. There are various sensing detection methods. In the way of using magnetic float liquid level switch and using micro switch and mercury switch for liquid level monitoring, the processing and installation process of the sensor is complicated, the sensitivity of the sensor is low, and the intermediate connection circuit is complicated. The switches are connected in series through wires, and the integrated detection of liquid level signal and temperature signal cannot be realized

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  • Liquid level and temperature sensor

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Embodiment 1

[0019] The sensor circuit as figure 1 As shown, in this embodiment, the number of liquid level sensing switch modules is 3, the number of temperature sensitive switch modules is 2, the number of wire main resistors is 1, and a liquid level sensing switch K and a resistor R are connected in parallel to form a A liquid level sensing switch module, a temperature sensitive switch S and a resistor R are connected in parallel to form a temperature sensitive switch module; the value of the resistance R in the first liquid level sensing switch module is 510Ω, and the value of the resistance R in the second liquid level sensing switch module is The value of the resistance R in the third liquid level sensing switch module is 1.5KΩ, the value of the resistance S in the first temperature-sensitive switch module is 1.8KΩ, and the value of the resistance S in the second temperature-sensitive switch module is 5.6KΩ; The main resistance Rc of the wire is 510Ω.

[0020] The sensor circuit con...

Embodiment 2

[0025] The sensor circuit as figure 2 As shown, in this embodiment, the number of liquid level sensing switch modules is selected as 4, the number of temperature-sensitive switch modules is 1, and the number of wire main resistances is 2, which is the first wire main resistance R C1 and the second lead main resistance R C2 , The liquid level sensor switch is a dry reed switch with a magnetic float.

[0026] The sensor circuit as figure 2 A liquid level sensing switch K and a resistor R are connected in parallel to form a liquid level sensing switch module, a temperature sensitive switch S and a resistor R are connected in parallel to form a temperature sensitive switch module; the resistance R in the first liquid level sensing switch module is taken as The value of the resistance R in the second liquid level sensing switch module is 1KΩ, the value of the resistance R in the third liquid level sensing switch module is 1.5KΩ, and the value of the resistance R in the fourth l...

Embodiment 3

[0029] The sensor circuit as image 3 As shown, in this embodiment, the number of liquid level sensing switch modules is 2, the number of temperature sensitive switch modules is 2, the number of wire main resistors is 1, and the liquid level sensing switch is a reed switch with a magnetic float .

[0030] The sensor circuit as image 3 A liquid level sensing switch K and a resistor R are connected in parallel to form a liquid level sensing switch module, a temperature sensitive switch S and a resistor R are connected in parallel to form a temperature sensitive switch module; the resistance R in the first liquid level sensing switch module is taken as The value of the resistance R in the second liquid level sensing switch module is 630Ω, the value of the resistance S in the first temperature-sensitive switch module is 1.5KΩ, and the value of the resistance S in the second temperature-sensitive switch module is 3.3KΩ; Main resistance R C The value is 1.2KΩ.

[0031] The sens...

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Abstract

The invention relates to a liquid level and temperature sensor which belongs to the technical field of sensor. The sensor circuit comprises a liquid level inductive switch module, a temperature sensitive switch module, a conducting wire main resistor and a conducting wire; and the connection of the sensor circuit is in such a way that the liquid level inductive switch module, the temperature sensitive switch module and the conducting wire main resistor are connected in series by the conducting wire. The liquid level and temperature sensor has the advantages that a liquid level signal and a temperature signal can be detected by the sensor simultaneously, the connection state of a signal circuit of the sensor can be directly detected, the structure is simple, the signal detection cost and the engineering construction cost are saved, signal detection circuits are reduced, the opening or closing state of an electromagnetic valve can be controlled and detected, and the sensor is stable and reliable at work.

Description

technical field [0001] The invention belongs to the technical field of sensors, in particular to a liquid level temperature sensor. Background technique [0002] At present, when detecting the liquid level or temperature of fire water tanks, fire water tanks, automobile water tanks, fuel tanks or oil tanks, liquid level detection and temperature detection are an important part of industrial applications. There are various sensing detection methods. In the way of using magnetic float liquid level switch and using micro switch and mercury switch for liquid level monitoring, the processing and installation process of the sensor is complicated, the sensitivity of the sensor is low, and the intermediate connection circuit is complicated. The switches are connected in series through wires, so the integrated detection of liquid level signal and temperature signal cannot be realized. Contents of the invention [0003] Aiming at the deficiencies in the prior art, the present inven...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01F23/30G01K11/00
Inventor 余广智翁立坚梅志斌宋珍
Owner SHENYANG FIRE RES INST OF THE MIN OF PUBLIC SECURITY