CN103115655A - Frequency conversion liquid level detecting structure - Google Patents
Frequency conversion liquid level detecting structure Download PDFInfo
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- CN103115655A CN103115655A CN2012105539137A CN201210553913A CN103115655A CN 103115655 A CN103115655 A CN 103115655A CN 2012105539137 A CN2012105539137 A CN 2012105539137A CN 201210553913 A CN201210553913 A CN 201210553913A CN 103115655 A CN103115655 A CN 103115655A
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Abstract
The invention discloses a frequency conversion liquid level detecting structure which comprises a material box. The material box is respectively provided with a feeding valve and a discharging valve. The frequency conversion liquid level detecting structure is characterized in that a material sensor is arranged inside the material box, and the material sensor is connected with an execution unit through a signal processing unit. The material sensing technology has large anti-interference capacity, and is capable of precisely detecting material levels, especially in detecting the liquid level of liquid, and effects are particularly obvious. Meanwhile, due to the fact that alternating signals pass through the sensor, the electrocorrosion of the sensor is very small, the sensor is durable, and the service life of equipment is effectively prolonged.
Description
Technical field
The present invention relates to the technical field of thing position detection, specifically a kind of frequency conversion liquid level detection architecture, particularly its physical construction.
Background technology
Public thing position detection technique be by the material that will detect near to or in contact with to level transducer the time, level transducer produces switch or judges that with voltage, size of current the signal of switch is to signal processing unit, signal processing unit detected material near to or in contact with to level transducer, away from or leave level transducer and obtain different signals, signal processing unit can be different according to this signal process the signal obtain and output to performance element, be able to be take the thing position application of foundation.This thing position sensing technology easily is interfered, and may be not suitable with when detecting the different physical states (interval that changes as resistance changes) of different materials or material simultaneously.
Take power and water conduction liquid level sensor as example, electrical conductivity of water is different in different places, the principle of level sensor is to come sensed water level to change with the conductive probe whether water touches level sensor, traditional level sensing mode is in the very large place of hardness, and is larger with reference to the signal amplitude of output with water level; And in the very little place of the water hardness, less with reference to the signal amplitude of output with water level, accurate threshold criteria judges whether water touches the conductive probe of level sensor with regard to being difficult to stipulate a unification like this.
Summary of the invention
The object of the present invention is to provide a kind of frequency conversion liquid level detection architecture, utilizing the level transducer output signal is the AC signal that the certain frequency variation range is arranged, improvement thing position is reliability and the accommodation of liquid level detection especially, has overcome the shortcoming and defect that exists in the prior art.
To achieve these goals, technical scheme of the present invention is: a kind of frequency conversion liquid level detection architecture, it comprises body feed tank, the body feed tank place is provided with respectively inlet valve and bleeder valve, it is characterized in that: be provided with level transducer in described body feed tank, this level transducer is connected with performance element by signal processing unit.
This case discloses a kind of frequency conversion liquid level detection architecture, and this thing position sensing technology has larger antijamming capability, can more accurately detect the thing position, and especially when the liquid level of tracer liquid, effect is especially remarkable.Simultaneously, owing to being AC signal process sensor, the electrocorrosion of sensor is just very little, and sensor is more durable, has effectively increased the serviceable life of equipment.
Description of drawings
Fig. 1 is structural representation of the present invention.
Embodiment
The invention will be further described below in conjunction with drawings and Examples.
The invention discloses a kind of frequency conversion liquid level detection architecture, it comprises body feed tank 1, body feed tank 1 place is provided with respectively inlet valve 2 and bleeder valve 3, it is different from prior art and is: be provided with level transducer 4 in described body feed tank 1, this level transducer 4 is connected with performance element 6 by signal processing unit 5.
In the specific implementation, described level transducer 4 signal that outputs to signal processing unit 5 is the AC signal that the certain frequency variation range is arranged.
Signal processing unit has two kinds on the ac signaling of processing frequency change:
a kind of mode is the frequency-discriminating circuit that signal processing unit 5 comprises a simulation, this frequency-discriminating circuit can be when the AC signal input of change frequency, output is with the direct current signal of the size generation of frequency change, signal processing unit 5 is with the thresholding of this direct current signal contrast regulation, judge material near to or in contact with or material away from or leave level transducer 4, between level transducer 4 and signal processing unit 5, AC signal is arranged always, when the material in body feed tank 1 rises near to or in contact with level transducer 4, the frequency of AC signal changes, the frequency change value is by signal processing unit processes with after judging, output signal to performance element 6, the unlike signal that performance element 6 basis signal processing units provide carries out different operations.
another kind of mode is that signal processing unit 5 comprises a digital processing circuit, this digital processing circuit can be when the AC signal input of change frequency, count and remember the monopulse number of times of AC signal and the interval time of adjacent pulse, according to the time interval of regular regular hour section contrast adjacent pulse, the proper calculation certain according to this time interval process is with regard to the exportable direct current signal that produces with frequency change, processing unit is with the threshold thresholding of this direct current signal contrast regulation, judge material near to or in contact with or material away from or leave level transducer 4, the logical value that draws according to judgement outputs signal to performance element 6.
Above content is in conjunction with concrete preferred implementation further description made for the present invention, can not assert that the concrete enforcement of the present invention is confined to above-mentioned these explanations.For the general technical staff of the technical field of the invention, without departing from the inventive concept of the premise, can also make some simple deduction or replace, all should be considered as belonging to protection scope of the present invention.
Claims (4)
1. frequency conversion liquid level detection architecture, it comprises body feed tank (1), body feed tank (1) locates to be provided with respectively inlet valve (2) and bleeder valve (3), it is characterized in that: be provided with level transducer (4) in described body feed tank (1), this level transducer (4) is connected with performance element (6) by signal processing unit (5).
2. a kind of frequency conversion liquid level detection architecture according to claim 1, it is characterized in that: the signal that described level transducer (4) outputs to signal processing unit (5) is the AC signal that the certain frequency variation range is arranged.
3. a kind of frequency conversion liquid level detection architecture according to claim 1, it is characterized in that: described signal processing unit (5) comprises the frequency-discriminating circuit of a simulation, this frequency-discriminating circuit can be when the AC signal input of change frequency, output is with the direct current signal of the size generation of frequency change, signal processing unit (5) is with the thresholding of this direct current signal contrast regulation, judge material near to or in contact with or material away from or leave level transducer (4).
4. a kind of frequency conversion liquid level detection architecture according to claim 1, it is characterized in that: described signal processing unit (5) comprises a digital processing circuit, this digital processing circuit can be when the AC signal input of change frequency, count and remember the monopulse number of times of AC signal and the interval time of adjacent pulse, according to the time interval of regular regular hour section contrast adjacent pulse, the proper calculation certain according to this time interval process is with regard to the exportable direct current signal that produces with frequency change, processing unit is with the threshold thresholding of this direct current signal contrast regulation, judge material near to or in contact with or material away from or leave level transducer (4), the logical value that draws according to judgement outputs signal to performance element (6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012105539137A CN103115655A (en) | 2012-12-19 | 2012-12-19 | Frequency conversion liquid level detecting structure |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012105539137A CN103115655A (en) | 2012-12-19 | 2012-12-19 | Frequency conversion liquid level detecting structure |
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| CN103115655A true CN103115655A (en) | 2013-05-22 |
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| CN2012105539137A Pending CN103115655A (en) | 2012-12-19 | 2012-12-19 | Frequency conversion liquid level detecting structure |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105335656A (en) * | 2015-11-02 | 2016-02-17 | 南京大学 | Software security enhancing method based on binary rewrite and dynamic randomization |
| CN112985546A (en) * | 2021-02-20 | 2021-06-18 | 重庆四联测控技术有限公司 | Automatic testing arrangement of level switch |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60219518A (en) * | 1984-04-16 | 1985-11-02 | Matsushita Electric Ind Co Ltd | Bath boiler with water level detector |
| CN2214820Y (en) * | 1995-01-13 | 1995-12-13 | 西安卫星测控中心技术研究所 | Infusion alarm |
| CN101865718A (en) * | 2009-04-17 | 2010-10-20 | 深圳迈瑞生物医疗电子股份有限公司 | Liquid level detection circuit, device and calibration method thereof |
| CN101881706A (en) * | 2010-07-05 | 2010-11-10 | 深圳迈瑞生物医疗电子股份有限公司 | Sampling device and method |
| CN102720483A (en) * | 2012-05-30 | 2012-10-10 | 中国石油大学(华东) | New method for measuring liquid level of oilwell |
| CN203083646U (en) * | 2012-12-19 | 2013-07-24 | 上海博玺自动化科技有限公司 | Frequency conversion liquid level detection structure |
-
2012
- 2012-12-19 CN CN2012105539137A patent/CN103115655A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60219518A (en) * | 1984-04-16 | 1985-11-02 | Matsushita Electric Ind Co Ltd | Bath boiler with water level detector |
| CN2214820Y (en) * | 1995-01-13 | 1995-12-13 | 西安卫星测控中心技术研究所 | Infusion alarm |
| CN101865718A (en) * | 2009-04-17 | 2010-10-20 | 深圳迈瑞生物医疗电子股份有限公司 | Liquid level detection circuit, device and calibration method thereof |
| CN101881706A (en) * | 2010-07-05 | 2010-11-10 | 深圳迈瑞生物医疗电子股份有限公司 | Sampling device and method |
| CN102720483A (en) * | 2012-05-30 | 2012-10-10 | 中国石油大学(华东) | New method for measuring liquid level of oilwell |
| CN203083646U (en) * | 2012-12-19 | 2013-07-24 | 上海博玺自动化科技有限公司 | Frequency conversion liquid level detection structure |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105335656A (en) * | 2015-11-02 | 2016-02-17 | 南京大学 | Software security enhancing method based on binary rewrite and dynamic randomization |
| CN112985546A (en) * | 2021-02-20 | 2021-06-18 | 重庆四联测控技术有限公司 | Automatic testing arrangement of level switch |
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Effective date of registration: 20160516 Address after: Jiading District Anting Town, Cao Lian Lu, Shanghai No. 66 building 3 201804 Applicant after: Shanghai Bowvon Energy-saving Electrical Appliance Co., Ltd. Address before: Jiading District Huang Du Zhen Cao Lian Lu, Shanghai City No. 66 201804 Applicant before: Shanghai Boxi Automation Technology Co., Ltd. |
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| WD01 | Invention patent application deemed withdrawn after publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20130522 |