CN102494738A - Design method for processing circuit of photoelectric liquid-level instrument - Google Patents
Design method for processing circuit of photoelectric liquid-level instrument Download PDFInfo
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- CN102494738A CN102494738A CN2011104116060A CN201110411606A CN102494738A CN 102494738 A CN102494738 A CN 102494738A CN 2011104116060 A CN2011104116060 A CN 2011104116060A CN 201110411606 A CN201110411606 A CN 201110411606A CN 102494738 A CN102494738 A CN 102494738A
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- power supply
- analog switch
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- infraluminescence pipe
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Abstract
The invention discloses a design method for a processing circuit of a photoelectric liquid-level instrument. According to the design method, a power supply for supplying power, an adjustable power supply, an infrared light-emitting diode array, a light-emitting tube control unit, an infrared receiving tube array, a multi-channel analog switch, an A/D (Analog/Digital) converter and a processor are included. The design method is characterized in that the processor is respectively conducted with the light-emitting tube control unit, the multi-channel analog switch and the adjustable power supply; the processor is conducted with the output end of the multi-channel analog switch through the A/D converter; the output end of the light-emitting tube control unit is respectively conducted with each branch at the input end of the infrared light-emitting diode array; the infrared light-emitting diode array is connected with the adjustable power supply; and the input end of the multi-channel analog switch is respectively conducted with each branch at the output end of the infrared receiving tube array. The processing circuit is low in power consumption, wide in power supply range and ultrastrong in error correcting capability for sensor data; and the work performance of the instrument is improved; and the reliability of the instrument is enhanced.
Description
Technical field
The invention belongs to the level gauging technical field, is a kind of processing circuits method of photoelectricity liquid level appearance.
Background technology
Very extensively, and what adopt the infrared photoelectric sensor mode in the steel band liquid level appearance was maximum during steel band liquid level appearance had been used in oil product storage tank is measured at present.Infrared photoelectric sensor generally by one group of infraluminescence pipe, one group of infrared receiving tube and be clipped in luminotron and receiving tube between and form with printing opacity stainless steel Gray code band or Gray's code-disc of liquid level interlock, luminotron is corresponding one by one with the receiving tube position.Common implementation method all luminotron series connection back by the constant current source driven for emitting lights, receiving tube through on draw or after pull down resistor output terminal level gives the IO of gate circuit or CPU, convert level value into according to the logical data of device identification.There is following problem in this method: the one, and apolegamy safety barrier difficulty.Owing to adopt the luminotron series workings, guarantee the luminotron operate as normal, higher to the instrument power supply voltage request, and also consumed power is also big.The meter type that has requires power supply can not be lower than 20V; Instrument after the improvement has adopted one group of series connection of per 5 luminotrons, and supply voltage requires to decrease, but Overall Power Consumption is still bigger; Concerning using the essential safe type instrument of petroleum chemical industry, common safety barrier is difficult to satisfy.Its two logical data is prone to make mistakes.Because the logic level identification requirement of the IO of gate circuit or CPU must < 0.3Vcc or>0.7Vcc; And all be uncertain in the logic determines of the voltage input end of (0.3 ~ 0.7) Vcc; This just requires infraluminescence and the very strictness of RL coupling, otherwise can cause the data saltus step of liquid level appearance.Its three maintenance reaches long-time performance greatly to be reduced.Work for a long time luminous receiving tube performance reduced in the instrument scene; And the printing opacity sign indicating number with on the influence of stain and run location deviation all can cause logic level undesirable and cause error in data; Detect thereby influence instrumentation, increase field maintemance personnel's working strength.
Summary of the invention
The processing circuits method that the purpose of this invention is to provide a kind of photoelectricity liquid level appearance; This circuit low-power consumption, service area are wide, and sensing data is had the super error ability, and have the instrumentation of raising performance; Strengthen Meter Reliability, reduce the advantage of field staff's labour intensity.
Technical scheme of the present invention is a kind of processing circuits method of photoelectricity liquid level appearance; It comprises power supply, regulated power supply, infraluminescence pipe array, luminotron control module, infrared receiving tube array, multiway analog switch, A/D converter and processor; It is characterized in that: processor respectively with luminotron control module, multiway analog switch and regulated power supply conducting, the output terminal of processor and multiway analog switch is through the A/D converter conducting; All conductings of every branch road of input end of the output terminal of luminotron control module and infraluminescence pipe array, infraluminescence pipe array connects regulated power supply; The all conductings of every branch road of the output terminal of the input end of multiway analog switch and infrared receiving tube array; Infraluminescence pipe array is corresponding one by one with every passage of infrared receiving tube array; Power supply is to regulated power supply, infrared receiving tube array and processor power supply.
Described regulated power supply is the constant current source of adjustable current output or the constant pressure source of adjustable voltage output.
Every branch road walks abreast in the described infraluminescence pipe array, and every branch road all has current-limiting resistance of independently infraluminescence pipe parallel-series.
Described luminotron control module is serial-parallel converters spare or multiway analog switch device.
Store preset threshold voltage in the described processor.
Characteristics of the present invention are: 1, the power consumption of circuit reduces greatly, and < 20mW requires to relax to system's supply voltage, for the two-wire system instrument is laid a good foundation power consumption; The reduction of circuit power consumption has adapted to instrument more safety barrier has been selected.
When 2, circuit adopted intermittent duty, average power consumption can be lower, is applicable in the more equipment.
3, the raising of data-handling capacity still can normally detect very unfavorable logic level originally, and stronger error correction capability is arranged.
4, the harshness requirement and the technology cost of device have been reduced; The health and the sub-health state of diagnosable instrument self-sensor device are carried out on-site maintenance and replacing in advance; Reduced field personnel's the labour intensity of safeguarding.
Description of drawings
To combine embodiment that the present invention is further described below.
Fig. 1 is the structural representation of the processing circuits method of photoelectricity liquid level appearance.
Among the figure: 1, power supply; 2, regulated power supply; 3, infraluminescence pipe array; 4, luminotron control module; 5, infrared receiving tube array; 6, multiway analog switch; 7, A/D converter; 8, processor.
Embodiment
As shown in Figure 1, power supply 1 and regulated power supply 2, infrared receiving tube array 5 and all conductings of processor 8, power supply 1 is supplied power the voltage that the wide voltage input of external power source is converted into 3.3V to entire circuit.
Regulated power supply 2 is adjustable voltage output types; With power supply 1, infraluminescence pipe array 3 and processor 8 conductings; The input voltage of regulated power supply 2 is provided by power supply 1; The output voltage of 2 pairs of infraluminescence pipes of regulated power supply array 3 is by processor 8 controls, and its Adjustable Output Voltage is put in order the luminous intensity of infraluminescence pipe in the infraluminescence pipe array 3.
All conductings of every branch road of input end of the output terminal of luminotron control module 4 and infraluminescence pipe array 3, every branch road is all to walk abreast in the infraluminescence pipe array 3, and every branch road all has current-limiting resistance of independently infraluminescence pipe parallel-series.Every branch road of infraluminescence pipe array 3 all receives the independent control that opens or closes of the serial-conversion that walks abreast of luminotron control module 4.
Infraluminescence pipe array 3 is corresponding one by one with every passage of infrared receiving tube array 5; The all conductings of every branch road of the output terminal of the input end of multiway analog switch 6 and infrared receiving tube array 5; The output terminal of multiway analog switch 6 is through A/D converter 7 and processor 8 conductings; The branch road of multiway analog switch 6 also with processor 8 direct conductings, store preset threshold voltage in the processor 8.
During work; The situation of every infraluminescence pipe array 3 every branch roads that 4 selections open or close according to the luminotron control module; Multichannel analog switch 6 is selected the output level with the infrared receiving tube of the corresponding passage of luminotron simultaneously; Through A/D converter 7 conversions, transformation result compares with preset threshold level, obtains the logical data of this passage; Thereby select the luminotron open successively and handle corresponding receiving tube voltage output to obtain each and the corresponding single pass logical data of liquid level, and convert liquid level data into.
In the test process to the degree of closeness of channel sample data and threshold voltage; To diagnose the state quality of instrumentation quantitatively, in time carry out the instrument maintenance and change the reliability of enhancing liquid level control system; This circuit low-power consumption simultaneously, service area are wide, and sensing data is had the super error ability.
Electrical components such as infraluminescence pipe, A/D converter all are that often use this area, and the distribution road of this circuit and distribution element all are that this area is commonly used, do not do special explanation at this.
Claims (5)
1. the processing circuits method of a photoelectricity liquid level appearance; It comprises power supply, regulated power supply, infraluminescence pipe array, luminotron control module, infrared receiving tube array, multiway analog switch, A/D converter and processor; It is characterized in that: processor respectively with luminotron control module, multiway analog switch and regulated power supply conducting, the output terminal of processor and multiway analog switch is through the A/D converter conducting; All conductings of every branch road of input end of the output terminal of luminotron control module and infraluminescence pipe array, infraluminescence pipe array connects regulated power supply; The all conductings of every branch road of the output terminal of the input end of multiway analog switch and infrared receiving tube array; Infraluminescence pipe array is corresponding one by one with every passage of infrared receiving tube array; Power supply is to regulated power supply, infrared receiving tube array and processor power supply.
2. according to the processing circuits method of a kind of photoelectricity liquid level appearance described in the claim 1, it is characterized in that: described regulated power supply is the constant current source of adjustable current output or the constant pressure source of adjustable voltage output.
3. according to the processing circuits method of a kind of photoelectricity liquid level appearance described in the claim 1, it is characterized in that: every branch road walks abreast in the described infraluminescence pipe array, and every branch road all has current-limiting resistance of independently infraluminescence pipe parallel-series.
4. according to the processing circuits method of a kind of photoelectricity liquid level appearance described in the claim 1, it is characterized in that: described luminotron control module is serial-parallel converters spare or multiway analog switch device.
5. according to the processing circuits method of a kind of photoelectricity liquid level appearance described in the claim 1, it is characterized in that: store preset threshold voltage in the described processor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110411606.0A CN102494738B (en) | 2011-12-12 | A kind of process circuit of photoelectric liquid-level instrument |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110411606.0A CN102494738B (en) | 2011-12-12 | A kind of process circuit of photoelectric liquid-level instrument |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102494738A true CN102494738A (en) | 2012-06-13 |
| CN102494738B CN102494738B (en) | 2016-12-14 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106030260A (en) * | 2014-02-24 | 2016-10-12 | 费森尤斯卡比德国有限公司 | Apparatus and method for determining the liquid level of salvaged blood in a blood collection reservoir of an autologous blood transfusion system |
| CN108759984A (en) * | 2018-07-25 | 2018-11-06 | 江苏雅凯医疗科技有限公司 | A kind of transparent pipeline liquid level emasuring device |
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| CN2634446Y (en) * | 2003-07-04 | 2004-08-18 | 上海航天汽车机电股份有限公司 | Circuit for integrated photoelectric liquid sensor |
| CN201237507Y (en) * | 2008-03-17 | 2009-05-13 | 翟允正 | Dual-absolute value optoelectronic encoding liquid level temperature transmitter |
| CN201724706U (en) * | 2010-07-23 | 2011-01-26 | 北京博瑞特自动计量系统股份有限公司 | Oil discharge safety monitor |
| CN102162747A (en) * | 2010-12-26 | 2011-08-24 | 河海大学常州校区 | Signal processing circuit for photoelectric sensor |
| CN202433058U (en) * | 2011-12-12 | 2012-09-12 | 河北珠峰仪器仪表设备有限公司 | Processing circuit of photoelectric liquid level meter |
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2055612U (en) * | 1989-08-09 | 1990-04-04 | 马伯云 | Intelligence liquid level automatic controll instrument |
| CN2634446Y (en) * | 2003-07-04 | 2004-08-18 | 上海航天汽车机电股份有限公司 | Circuit for integrated photoelectric liquid sensor |
| CN201237507Y (en) * | 2008-03-17 | 2009-05-13 | 翟允正 | Dual-absolute value optoelectronic encoding liquid level temperature transmitter |
| CN201724706U (en) * | 2010-07-23 | 2011-01-26 | 北京博瑞特自动计量系统股份有限公司 | Oil discharge safety monitor |
| CN102162747A (en) * | 2010-12-26 | 2011-08-24 | 河海大学常州校区 | Signal processing circuit for photoelectric sensor |
| CN202433058U (en) * | 2011-12-12 | 2012-09-12 | 河北珠峰仪器仪表设备有限公司 | Processing circuit of photoelectric liquid level meter |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106030260A (en) * | 2014-02-24 | 2016-10-12 | 费森尤斯卡比德国有限公司 | Apparatus and method for determining the liquid level of salvaged blood in a blood collection reservoir of an autologous blood transfusion system |
| CN106030260B (en) * | 2014-02-24 | 2019-05-07 | 费森尤斯卡比德国有限公司 | Through retrieving the device and method of the liquid level of blood in blood collection storage cavern for determining autotransfusion system |
| CN108759984A (en) * | 2018-07-25 | 2018-11-06 | 江苏雅凯医疗科技有限公司 | A kind of transparent pipeline liquid level emasuring device |
| CN108759984B (en) * | 2018-07-25 | 2023-12-26 | 江苏雅凯医疗科技有限公司 | Transparent pipeline liquid level measurement device |
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Effective date of registration: 20120904 Address after: The eastern city of Handan province Hebei Xuechi road 056005 Applicant after: Hebei Zhufeng Instrument & Meter Co., Ltd. Address before: 710077, building 1, Residence Du Commerce, 69 Kam Yip Road, hi tech Zone, Shaanxi, Xi'an Applicant before: Xi'an Fuan Innovation Consultation Co., Ltd. |
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Address after: 056600 west section of Gucheng Road, Linzhang County, Handan, Hebei Patentee after: Hebei Zhufeng Instrument & Meter Co., Ltd. Address before: 056005 eastern section of snow road, Handan, Hebei Patentee before: Hebei Zhufeng Instrument & Meter Co., Ltd. |