CN102401684A - Non-contact object detector signal processing device - Google Patents
Non-contact object detector signal processing device Download PDFInfo
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- CN102401684A CN102401684A CN2010102811826A CN201010281182A CN102401684A CN 102401684 A CN102401684 A CN 102401684A CN 2010102811826 A CN2010102811826 A CN 2010102811826A CN 201010281182 A CN201010281182 A CN 201010281182A CN 102401684 A CN102401684 A CN 102401684A
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Abstract
The invention relates to a signal processing device. In order to solve the problem of large measurement errors caused by limitation of light and view angles in the traditional measurement, the invention provides a non-contact object detector signal processing device. The device is an electronic automatic processing device, and comprises a central processing unit, a power unit, a transmission unit, a receiving unit, an output unit and a key input unit. In the device, a count pulse signal is output according to the intensity of reflected light of a counter wheel, the signal processing deice takes a low power consumption microprogrammed control unit (MCU) as a control core, and by combining a digital signal processing technology, an object to be detected is detected at high sensitivity and low cost, and higher reliability and antijamming capability are achieved. Therefore, the problem of large measurement errors caused by limitation of light and view angles in the traditional measurement is solved.
Description
Technical field
The present invention relates to a kind of signal processing apparatus, specifically be meant a kind of contactless object detection signal processing apparatus.
Background technology
When the table tool that contains the mechanical counter device is calibrated, need a kind of device of winning the confidence its counting is accurately surveyed.With the gas meter is example, and the counter of gas meter adopts counting gear more, and the accuracy of traditional test gas meter is quantitatively to let certain gas through gas meter, checks then whether the reading of gas meter is consistent with the amount of passing through gas.But so the test light during with reading, angle of sight line when reading table numerical value has very big relation, often causes the inaccurate of measurement numerical value.
Summary of the invention
Cause the bigger problem of measuring error for overcoming the restriction that traditional measurement receives light, sight angle, the present invention provides a kind of contactless object detector signal processing apparatus.
The technical scheme that the present invention adopts is: contactless object detector signal processing apparatus, this device are an electronics automatic processing device, and it comprises:
---central processor unit, said central processing unit are chip MSP430F2012, and this chip comprises power supply port Vcc, grounding ports Vss, I/O mouth p1.1-p1.7 and p2.6-p2.7, reseting port Rst;
---power supply unit, this unit adopts chip LM7805 output+5V voltage and HT7133 output+3.3V voltage;
---transmitter unit, this unit contains light emitting diode;
---receiving element, this unit comprises photodiode;
---output unit, this unit comprises the demonstration light emitting diode;
---key-press input unit, this unit comprise two buttons;
It is characterized in that: the light emitting diode in the transmitter unit adopts the diode that emits white light, its minus earth, and its anodal first current-limiting resistance that passes through links to each other with the I/O mouth P1.1 of central processing unit;
The negative pole of the photodiode in the receiving element links to each other with+5V voltage, anodally links to each other with the I/O mouth P1.0 of central processing unit and passes through divider resistance ground connection;
Its minus earth of demonstration light emitting diode in the output unit, anodal second current-limiting resistance that passes through links to each other with the I/O mouth P1.7 of central processing unit;
One end of two buttons in the key-press input unit links to each other other end ground connection through the 3rd, the 4th current-limiting resistance with I/O mouth P2.6, the P2.7 of central processing unit respectively.
Described contactless object detector signal processing apparatus comprises the working mode selection switch; This switch is a two-way switch; The switch ends stationary contact links to each other with power supply port Vcc, the grounding ports Vss of central processing unit respectively, and middle moving contact links to each other with the I/O mouth P1.1 of central processing unit.
Described output unit comprises a NPN triode that plays on-off action, the grounded emitter of triode, and its base stage links to each other with the I/O mouth P1.7 of central processing unit through the 5th current-limiting resistance, and its collector warp the 6th current-limiting resistance links to each other with+5V voltage.
Beneficial effect of the present invention: this device utilizes the catoptrical strong and weak output counting pulse signal of counter wheel; Signal processing apparatus serves as the control core with low-power consumption microcontroller (MCU); The combined digital signal treatment technology; With implemented with low cost to the high-sensitivity detection of testee, and have higher reliability and antijamming capability.Thereby having solved traditional measurement receives the restriction of light, sight angle to cause the bigger problem of measuring error.
Description of drawings
Accompanying drawing is the concrete control circuit figure of this device.
Embodiment
Below in conjunction with accompanying drawing and embodiment the present invention is further specified.
Shown in accompanying drawing; The core of this device is a central processor unit; This central processing unit is chip MSP430F2012; This chip comprises power supply port Vcc, grounding ports Vss, I/O mouth p1.1-p1.7 and p2.6-p2.7, reseting port Rst, power supply employing+3.3V power supply, and this power supply is supplied with by the chip HT7133 output of power supply unit.
Power supply unit, as shown in the figure, the input end of chip LM7805 is imported by external voltage, and use on its output terminal output+5V power voltage supply road and as the input voltage of HT7133, HT7133 output+3.3V voltage supplies the central processing unit use.
Light emitting diode in the transmitter unit adopts the diode D3 that emits white light, its minus earth, and its anodal first current-limiting resistance R1 that passes through links to each other with the I/O mouth P1.1 of central processing unit.
The negative pole of photodiode D1 in the receiving element links to each other with+5V voltage, anodally links to each other with the I/O mouth P1.0 of central processing unit and passes through divider resistance R5 ground connection.
Its minus earth of demonstration light emitting diode D2 in the output unit, the anodal second current-limiting resistance R6 that passes through links to each other with the I/O mouth P1.7 of central processing unit.
Two button S1 in the key-press input unit, the end of S2 link to each other other end ground connection through the 3rd, the 4th current-limiting resistance R8, R7 with I/O mouth P2.6, the P2.7 of central processing unit respectively.
Concrete principle of work is: a reflector plate is installed on tested counter, a reflector plate, engaging means power supply for example are installed on " 0 " of minimum scale sign indicating number; This moment, central processing unit MSP430F2012 started working, and the diode D3 that emits white light of electric bright transmitter unit is if this moment, light was aimed at reflector plate; The resistance of the photodiode D1 of receiving element changes at this moment; Because photodiode D1 connect with divider resistance R5 and+5V and ground between, the partial pressure value on the divider resistance R5 will produce a variation at this moment, the I/O mouth P1.0 of central processing unit is delivered in this level variation; Carry out the A/D conversion through central processing unit MSP430F2012 inside; Compare with the standard value of its inner setting, when reaching standard value, the P1.7 of central processing unit MSP430F2012 sees a high level off and lights demonstration light emitting diode D2.In the actual detected process; Because counting gear is in continuous rotation; Least count gear revolution moves a week; The P1.7 of central processing unit MSP430F2012 just sees a high level off and lights and once show light emitting diode D2, therefore along with the P1.7 mouth of the continuous rotation center processor MSP430F2012 of counting gear just can be seen a series of count pulse off.
Because in the actual measurement process; The light power that the power of ambient light can make photodiode D1 accept also can be different; Cause the judgement of the P1.0 mouth change in voltage Different Effects central processing unit of central processing unit MSP430F2012; Therefore increase by two adjustment button S1, S2, the standard value of setting in the adjustment central processing unit through button S1, S2 size.
Because in measuring process; The P1.7 mouth of central processing unit MSP430F2012 just can be seen a series of count pulse off, is sent in the counting assembly of other WV for making count pulse, in the output unit of device, has increased the NPN triode Q1 of an on-off action; Be used for voltage transitions; The grounded emitter of triode, its base stage link to each other with the I/O mouth P1.7 of central processing unit through the 5th current-limiting resistance R4, and its collector warp the 6th current-limiting resistance R2 links to each other with+5V voltage.
For using this device flexibly, this device also is provided with working mode selection K switch W1, and is as shown in the figure; When the armature contact of selecting K switch W1 and earthing contact closure; The diode D3 that emits white light in the transmitter unit is in always and extinguishes state, and this moment, device was in passive duty, if when the irradiation of other illuminating source is arranged this moment; The photodiode D1 of receiving element still can produce change in resistance in the device, and device can be worked.
When the armature contact of selecting K switch W1 and the Vcc closing of contact, the device duty that has the initiative, the diode D3 that emits white light in the transmitter unit is in illuminating state always.
Claims (3)
1. contactless object detector signal processing apparatus, this device are an electronics automatic processing device, and it comprises:
---central processor unit, said central processing unit are chip MSP430F2012, and this chip comprises power supply port Vcc, grounding ports Vss, I/O mouth p1.1-p1.7 and p2.6-p2.7, reseting port Rst;
---power supply unit, this unit adopts chip LM7805 output+5V voltage and HT7133 output+3.3V voltage;
---transmitter unit, this unit contains light emitting diode;
---receiving element, this unit comprises photodiode;
---output unit, this unit comprises the demonstration light emitting diode;
---key-press input unit, this unit comprise two buttons;
It is characterized in that: the light emitting diode in the transmitter unit adopts the diode that emits white light, its minus earth, and its anodal first current-limiting resistance that passes through links to each other with the I/O mouth P1.1 of central processing unit;
The negative pole of the photodiode in the receiving element links to each other with+5V voltage, anodally links to each other with the I/O mouth P1.0 of central processing unit and passes through divider resistance ground connection;
Its minus earth of demonstration light emitting diode in the output unit, anodal second current-limiting resistance that passes through links to each other with the I/O mouth P1.7 of central processing unit;
One end of two buttons in the key-press input unit links to each other other end ground connection through the 3rd, the 4th current-limiting resistance with I/O mouth P2.6, the P2.7 of central processing unit respectively.
2. described contactless object detector signal processing apparatus according to claim 1; It is characterized in that: this device comprises the working mode selection switch; This switch is a two-way switch; The switch ends stationary contact links to each other with power supply port Vcc, the grounding ports Vss of central processing unit respectively, and middle moving contact links to each other with the I/O mouth P1.1 of central processing unit.
3. described contactless object detector signal processing apparatus according to claim 1; It is characterized in that: described output unit comprises a NPN triode that plays on-off action; The grounded emitter of triode; Its base stage links to each other with the I/O mouth P1.7 of central processing unit through the 5th current-limiting resistance, and its collector warp the 6th current-limiting resistance links to each other with+5V voltage.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010102811826A CN102401684A (en) | 2010-09-09 | 2010-09-09 | Non-contact object detector signal processing device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010102811826A CN102401684A (en) | 2010-09-09 | 2010-09-09 | Non-contact object detector signal processing device |
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| CN102401684A true CN102401684A (en) | 2012-04-04 |
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| CN2010102811826A Pending CN102401684A (en) | 2010-09-09 | 2010-09-09 | Non-contact object detector signal processing device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107796291A (en) * | 2016-09-05 | 2018-03-13 | 大陆汽车电子(长春)有限公司 | Clutch master cylinder position sensor detection means and method |
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2010
- 2010-09-09 CN CN2010102811826A patent/CN102401684A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107796291A (en) * | 2016-09-05 | 2018-03-13 | 大陆汽车电子(长春)有限公司 | Clutch master cylinder position sensor detection means and method |
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Application publication date: 20120404 |