CN102929176A - Low-power-consumption reflection-type infrared optoelectronic switch control circuit of electromagnetic flowmeter - Google Patents
Low-power-consumption reflection-type infrared optoelectronic switch control circuit of electromagnetic flowmeter Download PDFInfo
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- CN102929176A CN102929176A CN2012104356393A CN201210435639A CN102929176A CN 102929176 A CN102929176 A CN 102929176A CN 2012104356393 A CN2012104356393 A CN 2012104356393A CN 201210435639 A CN201210435639 A CN 201210435639A CN 102929176 A CN102929176 A CN 102929176A
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- 230000005693 optoelectronics Effects 0.000 title abstract description 14
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- 239000003990 capacitor Substances 0.000 claims description 6
- 230000002035 prolonged effect Effects 0.000 abstract description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000003139 buffering effect Effects 0.000 description 1
- 125000004122 cyclic group Chemical group 0.000 description 1
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Abstract
The invention relates to a low-power-consumption reflection-type infrared optoelectronic switch control circuit of an electromagnetic flowmeter. Three reflection-type infrared optoelectronic switches, three inverter buffers and one two-way four-channel selective multiplexer are adopted, time-sharing control and button identification are carried out through an input/output (I/O) port of a single chip microcomputer, service life of the infrared optoelectronic switches is prolonged, and occupation quantity of the I/O port of the single chip microcomputer caused by inputting buttons is reduced. On-off time of an infrared emitting diode of the plurality of the reflection-type infrared optoelectronic switches in the electromagnetic flowmeter can be timely adjusted according to different working states such as working time and non-working time, and a problem that the electromagnetic flowmeter is always in a conducting state and consumption is big is avoided. In addition, only one I/O port of the single chip microcomputer is needed for receiving end portions of the plurality of the reflection-type infrared optoelectronic switches for time sharing judgment, and possibility is provided for extension of other functions of the single chip microcomputer.
Description
Technical field
The present invention relates to a kind of electromagnetic flowmeter low-power consumption reflection-type Photoelectric infrared switch control circuit, be applicable to too in other automatic controls or the instrument and meter control of a plurality of switches be judged.
Background technology
The employed reflection-type Photoelectric infrared switch of more current instrument and meters adopts the corresponding single-chip processor i/o of each switch to interrupt more, and the transmitting terminal diode is in "on" position all the time, and to wait for the generation of actuation of keys, the defective of this design is:
1 reflection-type Photoelectric infrared switch emitting diode is in "on" position all the time, and the electromagnetic flowmeter most of the time is in non-button period treatment state, and its unnecessary loss is excessive, has caused larger difficulty for the design of low-power consumption.
2 for electromagnetic flowmeter, and at least three of required reflection-type optoelectronic switch are relatively many, more to taking of single-chip microcomputer hardware resource if the corresponding I/O mouth of each optoelectronic switch interrupts, and is unfavorable for the expansion of other functions.
Summary of the invention
Deficiency in view of the prior art existence, the invention provides in the reflection-type Photoelectric infrared switch circuit that a kind of two path multiplexers are applied to electromagnetic flowmeter is electromagnetic flowmeter low-power consumption reflection-type Photoelectric infrared switch control circuit, can well solve the existing problem of current this partial circuit.
The present invention to achieve these goals, the technical scheme that adopts is: a kind of electromagnetic flowmeter low-power consumption reflection-type Photoelectric infrared switch control circuit, it is characterized in that: comprise reflection-type Photoelectric infrared switch SW1, SW2, SW3 and inverter buffer U1, U2, three identical on-off circuits that U3 consists of, comprise that also the two-way four-way can select multiplexer MUL_1, described two-way four-way can select the 14 pin 1X of multiplexer MUL_1 to connect the infrared-emitting diode positive pole of reflection-type Photoelectric infrared switch SW1, the infrared-emitting diode negative pole of reflection-type Photoelectric infrared switch SW1 and phototriode emitter join an end and the power supply ground of shunt-wound capacitance C4, the phototriode pipe collector of reflection-type Photoelectric infrared switch SW1 connects the 1 pin input end of inverter buffer U1, one end of the other end of capacitor C 4 and resistance R 1, another termination power VCC of resistance R 1, output terminal 2 pin of inverter buffer U1 meet the 5 pin 1Y that the two-way four-way can be selected multiplexer MUL_1;
The two-way four-way can select the 15 pin 2X of multiplexer MUL_1 to connect the infrared-emitting diode positive pole of reflection-type Photoelectric infrared switch SW2, the infrared-emitting diode negative pole of reflection-type Photoelectric infrared switch SW2 and phototriode emitter join an end and the power supply ground of shunt-wound capacitance C5, the phototriode pipe collector of reflection-type Photoelectric infrared switch SW2 connects the 1 pin input end of inverter buffer U2, one end of the other end of capacitor C 5 and resistance R 2, another termination power VCC of resistance R 2, output terminal 2 pin of inverter buffer U2 meet the 2 pin 2Y that the two-way four-way can be selected multiplexer MUL_1;
The two-way four-way can select the 11 pin 3X of multiplexer MUL_1 to connect the infrared-emitting diode positive pole of reflection-type Photoelectric infrared switch SW3, the infrared-emitting diode negative pole of reflection-type Photoelectric infrared switch SW3 and phototriode emitter join an end and the power supply ground of shunt-wound capacitance C6, the phototriode pipe collector of reflection-type Photoelectric infrared switch SW3 connects the 1 pin input end of inverter buffer U3, one end of the other end of capacitor C 6 and resistance R 3, another termination power VCC of resistance R 3, output terminal 2 pin of inverter buffer U3 meet the 4 pin 3Y that the two-way four-way can be selected multiplexer MUL_1;
The two-way four-way can be selected 6 pin INH, 7 pin VEE, the 8 pin VSS ground connection of multiplexer MUL_1, and 16 pin VDD meet power supply VCC.
The invention has the beneficial effects as follows: adopt 3 reflection-type Photoelectric infrared switches, 3 inverter buffers and 1 two-way four-way can select multiplexer, carry out the identification of timesharing control and button by the single-chip processor i/o mouth, prolong the serviceable life of Photoelectric infrared switch, reduced the take quantity of input key to the single-chip processor i/o mouth.The make-and-break time of a plurality of reflection-type Photoelectric infrared switch infrared-emitting diodes can be according to different duties in the electromagnetic flowmeter, adjust in real time such as working time and non-working time, have avoided it to be in all the time conducting state, the problem that power consumption is larger; In addition, the receiving end of a plurality of reflection-type Photoelectric infrared switches part only needs a single-chip processor i/o mouth timesharing to judge, for other Function Extensions of single-chip microcomputer provide possibility.
Description of drawings
Fig. 1 is circuit theory diagrams of the present invention.
Fig. 2 is that two-way four-way of the present invention can be selected the multiplexer pin figure.
Embodiment
As shown in Figure 1, the two-way four-way can be selected the 13 pin X_COM of multiplexer MUL_1 to connect single-chip microcomputer output I/O mouth and provide high level for the infrared-emitting diode of reflection-type Photoelectric infrared switch, 10 pin A, 9 pin B meet two I/O of single-chip microcomputer to provide high-low level to select different reflection-type Photoelectric infrared switches in running order, 3 pin Y_COM connect the single-chip processor i/o mouth and interrupt, under normal circumstances, each " button " action can continue more than 1 second at least, by controlling 10 pin A, 9 pin B make 13 pin X_COM frequency cyclic switching with 10Hz between 14 pin 1X ~ 11 pin 3X, select the conducting of reflection-type Photoelectric infrared switch SW1 ~ SW3 with this, and locate the optoelectronic switch that " button " action has occured by the time period that decision level change to occur, like this, each switch only has time of 1/3rd in running order, greatly reduce the power consumption of this partial circuit, prolonged the serviceable life of optoelectronic switch, simultaneously, because used three reflection-type optoelectronic switch in the electromagnetic flowmeter, can select recombiner for the two-way four-way, 1 pin 0Y is not used for connecting optoelectronic switch, in the non-key scan state of single-chip microcomputer, can select larger proportion the time chien shih 13 pin X_COM conductings in 12 pin 0X, three reflection-type optoelectronic switch all are in not conducting, further reduce power consumption.
Reflection-type Photoelectric infrared switch SW1, SW2, SW3 are three reflection-type Photoelectric infrared switches of electromagnetic flowmeter, are comprised of transmitting terminal E and receiving end C two parts; When the positive pole of giving infrared-emitting diode provided high level, it was in conducting state, if " button " action is arranged, infrared signal makes the conducting of receiving end phototriode, and output signal is low level, otherwise was high; MUL_1 is that a two-way four-way can be selected multiplexer, model is TC4052B, the pin that the two-way four-way can be selected multiplexer MUL_1 as shown in Figure 2, multiplexer 13 pin X_COM, 3 pin Y_COM connect the I/O mouth of single-chip microcomputer, the former provides high level for the transmitting terminal diode of reflection-type Photoelectric infrared switch, the I/O mouth is outbound course, and the latter is as judging receiving end conducting whether input port, and the I/O mouth is input direction; The two-way four-way can be selected 6 pin INH, 7 pin VEE, the 8 pin VSS ground connection of multiplexer, and 16 pin VDD meet power supply VCC, and 14 pin 1X, 15 pin 2X, 11 pin 3X connect respectively the positive pole of reflection-type Photoelectric infrared switch SW1 ~ SW3 emitting diode; 5 pin 1Y, 2 pin 2Y, 4 pin 3Y connect respectively the output terminal of reverse buffer U1 ~ U3; 10 pin A, 9 pin B connect the I/O mouth of single-chip microcomputer, it is the control pin that to select the multiplexer conducting to select to the two-way four-way, as 10 pin A, when 9 pin B are low level, 13 pin X_COM gating 0X, 3 pin Y_COM gating 0Y, in like manner, when 10 pin A be low level, when 9 pin B are high level, 13 pin X_COM gating 1X, 3 pin Y_COM gating 1Y; When 10 pin A be high level, when 9 pin B are low level, 13 pin X_COM gating 2X, 3 pin Y_COM gating 2Y; As 10 pin A, when 9 pin B are high level, 13 pin X_COM gating 3X, 3 pin Y_COM gating 3Y, accordingly, can select certain frequency to control the level height of A, B for different situations, make different reflection-type Photoelectric infrared switches be connected with disconnected, avoid its transmitting terminal diode in running order all the time, and the receiving end triode of a plurality of reflection-type optoelectronic switch only comes timesharing to judge by the input I/O of a single-chip microcomputer, and needn't the corresponding single I/O mouth of each reflection-type Photoelectric infrared switch, saved the hardware resource of single-chip microcomputer; U1 ~ U3 is reverse buffer, for input and output signal provides buffering, shaping.
Claims (1)
1. electromagnetic flowmeter low-power consumption reflection-type Photoelectric infrared switch control circuit, it is characterized in that: comprise reflection-type Photoelectric infrared switch SW1, SW2, SW3 and inverter buffer U1, U2, three identical on-off circuits that U3 consists of, comprise that also the two-way four-way can select multiplexer MUL_1, described two-way four-way can select the 14 pin 1X of multiplexer MUL_1 to connect the infrared-emitting diode positive pole of reflection-type Photoelectric infrared switch SW1, the infrared-emitting diode negative pole of reflection-type Photoelectric infrared switch SW1 and phototriode emitter join an end and the power supply ground of shunt-wound capacitance C4, the phototriode pipe collector of reflection-type Photoelectric infrared switch SW1 connects the 1 pin input end of inverter buffer U1, one end of the other end of capacitor C 4 and resistance R 1, another termination power VCC of resistance R 1, output terminal 2 pin of inverter buffer U1 meet the 5 pin 1Y that the two-way four-way can be selected multiplexer MUL_1;
The two-way four-way can select the 15 pin 2X of multiplexer MUL_1 to connect the infrared-emitting diode positive pole of reflection-type Photoelectric infrared switch SW2, the infrared-emitting diode negative pole of reflection-type Photoelectric infrared switch SW2 and phototriode emitter join an end and the power supply ground of shunt-wound capacitance C5, the phototriode pipe collector of reflection-type Photoelectric infrared switch SW2 connects the 1 pin input end of inverter buffer U2, one end of the other end of capacitor C 5 and resistance R 2, another termination power VCC of resistance R 2, output terminal 2 pin of inverter buffer U2 meet the 2 pin 2Y that the two-way four-way can be selected multiplexer MUL_1;
The two-way four-way can select the 11 pin 3X of multiplexer MUL_1 to connect the infrared-emitting diode positive pole of reflection-type Photoelectric infrared switch SW3, the infrared-emitting diode negative pole of reflection-type Photoelectric infrared switch SW3 and phototriode emitter join an end and the power supply ground of shunt-wound capacitance C6, the phototriode pipe collector of reflection-type Photoelectric infrared switch SW3 connects the 1 pin input end of inverter buffer U3, one end of the other end of capacitor C 6 and resistance R 3, another termination power VCC of resistance R 3, output terminal 2 pin of inverter buffer U3 meet the 4 pin 3Y that the two-way four-way can be selected multiplexer MUL_1;
The two-way four-way can be selected 6 pin INH, 7 pin VEE, the 8 pin VSS ground connection of multiplexer MUL_1, and 16 pin VDD meet power supply VCC.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210435639.3A CN102929176B (en) | 2012-11-05 | 2012-11-05 | Low-power-consumption reflection-type infrared optoelectronic switch control circuit of electromagnetic flowmeter |
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| CN201210435639.3A CN102929176B (en) | 2012-11-05 | 2012-11-05 | Low-power-consumption reflection-type infrared optoelectronic switch control circuit of electromagnetic flowmeter |
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| CN102929176A true CN102929176A (en) | 2013-02-13 |
| CN102929176B CN102929176B (en) | 2014-07-30 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109632027A (en) * | 2018-12-29 | 2019-04-16 | 浙江威星智能仪表股份有限公司 | A kind of low-power consumption treatment method of the Hall switch of gas meter, flow meter |
Citations (5)
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|---|---|---|---|---|
| US6226195B1 (en) * | 2000-03-31 | 2001-05-01 | Micro Motion, Incorporated | Circuitry for supplying a controlled signal to a drive system |
| CN101221057A (en) * | 2008-01-18 | 2008-07-16 | 天津天仪集团仪表有限公司 | On-site bus electromagnetic flowmeter |
| WO2009110214A1 (en) * | 2008-03-07 | 2009-09-11 | パナソニック株式会社 | Flow measuring device |
| CN101726334A (en) * | 2009-12-23 | 2010-06-09 | 合肥工业大学 | Electromagnetic flow meter excitation control system based on high and low voltage power switching |
| CN202916630U (en) * | 2012-11-05 | 2013-05-01 | 中环天仪股份有限公司 | Low power dissipation reflective type infrared photoelectric switch control circuit of electromagnetic flow meter |
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2012
- 2012-11-05 CN CN201210435639.3A patent/CN102929176B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6226195B1 (en) * | 2000-03-31 | 2001-05-01 | Micro Motion, Incorporated | Circuitry for supplying a controlled signal to a drive system |
| CN101221057A (en) * | 2008-01-18 | 2008-07-16 | 天津天仪集团仪表有限公司 | On-site bus electromagnetic flowmeter |
| WO2009110214A1 (en) * | 2008-03-07 | 2009-09-11 | パナソニック株式会社 | Flow measuring device |
| CN101726334A (en) * | 2009-12-23 | 2010-06-09 | 合肥工业大学 | Electromagnetic flow meter excitation control system based on high and low voltage power switching |
| CN202916630U (en) * | 2012-11-05 | 2013-05-01 | 中环天仪股份有限公司 | Low power dissipation reflective type infrared photoelectric switch control circuit of electromagnetic flow meter |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109632027A (en) * | 2018-12-29 | 2019-04-16 | 浙江威星智能仪表股份有限公司 | A kind of low-power consumption treatment method of the Hall switch of gas meter, flow meter |
| CN109632027B (en) * | 2018-12-29 | 2020-11-13 | 浙江威星智能仪表股份有限公司 | Low-power-consumption processing method for Hall switch of gas meter |
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| CN102929176B (en) | 2014-07-30 |
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Granted publication date: 20140730 |