Liquid level sensor with simulating function

Abstract

The invention discloses a liquid level sensor with a simulating function. The liquid level sensor comprises a light emitting module, a light receiving module, a signal processing module, a simulating module and an outputting module. The light emitting module is used for emitting light signals to the materials to be measured. The light receiving module is used for receiving and converting the light signals into electrical signals and inputting the electrical signals. The signal processing module is used for receiving the electrical signals and determining whether the materials is at a high level or a low level according to the electrical signals. The simulating module is connected with the signal processing module and is used for switching the electrical signals into normal outputted signals or simulating outputted signals. The outputting module is connected with a switcher electrically and inputting the normal outputted signals or the simulating outputted signals. The low liquid level signals can be converted into high liquid level signals and the high liquid level signals can be converted into the low liquid level signals by the simulating module to detect whether the liquid level sensor operates normally or not; and meanwhile, the liquid level sensor has a delay function, and liquid levels of different liquids can be measured accurately.

Description

technical field [0001] The invention relates to a material liquid level sensor, in particular to a material liquid level sensor with an analog function. [0002] Background technique [0003] Liquid level sensors play an important role in warehouse management and are used in various industries involving storage, such as petrochemical industry, large food industry, feed industry, steel industry, cement industry, etc., mainly through the detection of sensors. The rod detects the stock in the warehouse, so as to monitor the stock in the warehouse. [0004] One of them has an optical sensor, please refer to Figure 8 , which includes a light emitting module 80, a light receiving module 81, a signal processing module 82 and an output module 83, the light receiving module 81 has a photosensitive element to convert light signals into electrical signals. When in use, the light is mainly emitted by the light emitting module 80, which is reflected by the materials in the warehouse, ...

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Problems solved by technology

[0008] However, when the standard voltage value is lowered to 1 volt in the above simulation system, the voltage threshold is likely to drift due to impurities in the liquid, which makes it impossible to simulate the state of the liquid at a low level, and then mistakenly think that the sensor is abnormal , and the test method of the liquid at a high material level is relatively complicated, which causes inconvenience for users to operate. In view of the above problems, it is necessary to solve them and seek a feasible solution

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