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Boiler water level detecting device and control method thereof

A technology of water level detection and control method, applied in the field of sensors, can solve the problems of inability to find sensor faults and low detection accuracy, and achieve the effects of good stability and reliability, high detection accuracy and improved stability

Inactive Publication Date: 2015-12-16
于冲
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to overcome the low detection accuracy of the water level control instrument in the prior art and the inability to detect sensor faults, and to provide a boiler water level detection device with high detection accuracy, low cost, and good safety and its control. method

Method used

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  • Boiler water level detecting device and control method thereof
  • Boiler water level detecting device and control method thereof
  • Boiler water level detecting device and control method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0056] Such as figure 1 The shown embodiment is a boiler water level detection device. The boiler is provided with a water inlet pipe and an outlet pipe; it includes a housing, a single-chip microcomputer 1, an A / D converter 16 and a memory 2 arranged in the housing, and a housing An alarm device 3 and a display 4 on the body, a vertical stainless steel tube 6 with an open lower end in the boiler, an inductance coil 7 on the stainless steel tube; a silicon steel rod 8 that can move up and down relative to the stainless steel tube is arranged in the stainless steel tube , the float located at the lower end of the silicon steel rod and the guide cylinder for accommodating the lower part of the silicon steel rod and the float. Sensor 5; the lower end of the stainless steel pipe is provided with an extended edge 15 extending horizontally outwards, and the extended edge is sealed and connected with the inner wall of the boiler; an electromagnetic valve 16 is arranged on the water i...

Embodiment 2

[0076] Embodiment 2 includes all structures and steps in Embodiment 1. After the working time of the induction coil exceeds 5 minutes, step 400 of Embodiment 1 is replaced by the following steps:

[0077] The single-chip microcomputer reads the Z stored in the memory before the current time T2 time, and calculates and obtains the average value Z' of the Z at the current time and the Z before the T2 time,

[0078] When Z'≥W2, the solenoid valve of the water outlet pipe controlled by the single-chip microcomputer is opened for 5 minutes and then closed, and the display shows water information during the water intake process;

[0079] When Z′≤W1, the solenoid valve of the water inlet pipe controlled by the single-chip microcomputer is opened for 15 minutes and then closed, and the display shows the water inlet information during the water inlet process;

[0080] When W10 Increase the value of T2, return to step 200.

Embodiment 3

[0082] Embodiment 3 includes all structures and step parts in Embodiment 1, and also includes the following steps between steps 110 and 200 of Embodiment 1:

[0083] (7-1) The initial value of j is set to 1 in the memory, the initial value of i is 1, and the fault threshold E is set;

[0084] (7-2) The single-chip computer calculates the local maximum value of u(t) and obtains the upper envelope u through cubic spline interpolation up (t);

[0085] (7-3) Calculate the local minimum of the signal u(t) and obtain the lower envelope u through cubic spline interpolation low (t);

[0086] (7-4) Define the average envelope m 1 (t)=[u up (t)+u low (t)] / 2;

[0087] (7-5) Using the formula h j (t)=u(t)-m j (t) Calculate the difference h j (t);

[0088] (7-6) if h j (t) does not meet the IMF screening stop condition, make u(t)=h j (t), the value of j increases by 1, and returns to step (7-2) for h j (t) continue to decompose; when h j (t) Satisfies the IMF screening stop c...

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Abstract

The invention discloses a boiler water level detecting device and a control method for the device. A water inlet pipe and a water outlet pipe are arranged on a boiler, and the device comprises a shell, a single chip microcomputer, an A / D converter, a storage, an alarm device, a displayer, a vertical stainless steel pipe and an inductance coil, wherein the single chip microcomputer, the A / D converter and the storage are arranged in the shell, the alarm device and the displayer are arranged on the shell, the vertical stainless steel pipe is arranged on an opening in the lower end inside the boiler, and the inductance coil is arranged on the stainless steel pipe. A silicon steel stick, a floater and a guide cylinder are arranged in the stainless steel pipe, wherein the silicon steel stick can vertically move relative to the stainless steel pipe, the floater is arranged at the lower end of the silicon steel stick, and the guide cylinder is used for containing the lower portion of the silicon steel stick and the floater; the lower end of the guide cylinder is provided with an opening with the diameter smaller than that of the floater, and the guide cylinder is fixedly connected with the boiler; and a temperature sensor is arranged on a copper wire winding of the inductance coil. The boiler water level detecting device has the beneficial effects of being high in detecting precision, good in stability and reliability, wide in application range and free of limitation of the number and the diameter of the inductance coil.

Description

technical field [0001] The invention relates to the technical field of sensors, in particular to a boiler water level detection device with high detection accuracy, low cost and good safety and a control method thereof. Background technique [0002] The existing water level control instrument is inconvenient to debug and requires professional engineers. The signal drift of the circuit is relatively serious, the signal acquisition is unstable, the accuracy is low, the production cost is high, and the realization of the function is complicated and unstable. The diameter has the deficiency of strict requirements. [0003] Chinese Patent Authorization Publication No.: CN102650538A, authorized publication date August 29, 2012, discloses a vehicle fuel consumption combined measurement system and fuel tank water level sensor calibration method, mainly including: fuel tank, fuel tank outlet pipe, data line of vehicle fuel consumption meter, Automobile fuel consumption meter, oil ou...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F22B37/46F24H9/20
Inventor 于冲
Owner 于冲
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