CN2083307U - Counter - Google Patents
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- CN2083307U CN2083307U CN 90217287 CN90217287U CN2083307U CN 2083307 U CN2083307 U CN 2083307U CN 90217287 CN90217287 CN 90217287 CN 90217287 U CN90217287 U CN 90217287U CN 2083307 U CN2083307 U CN 2083307U
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- circuit
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Abstract
The utility model relates to a counter composed of a light source, a probe and a host computer, wherein, the probe adopts a light sensing device, and the host computer is composed of a power supply, a Schmidt toggle circuit, a counting circuit, a decoding circuit and a nixie tube. When the illuminating strength of light on the probe is changed, a series of pulses take place. The pulses form neat counting pulses through the Schmidt circuit, and then, the counting pulses after counted and decoded are displayed by the nixie tube. The product is suitable for the countering work of various pipelines, and the utility model has the advantages of reliable performance, high correctness, strong anti-interference capability, small volume and convenient installation and is an ideal counting product for industrial enterprises. The testing speed of the utility model can reach one piece in per millisecond, the detection width of the light source is equal to and bigger than 2 mm, and environmental adaptation temperature is ranged from -20 DEG C to 60 DEG C.
Description
The utility model relates to a kind of photoelectric counter of industrial application.
At present, mechanical counter and the piezoelectricity counter in industrial use all existing some problems in varying degrees.The accuracy rate of mechanical counter is not high, can only be used for pipelining at a slow speed, and its adaptive faculty is poor.The piezoelectric type counter is the cost height then, a little less than the antijamming capability.
Goal of the invention of the present utility model is to overcome the weak point of above-mentioned technology, and it is a kind of applied widely to utilize photosensitive device and schmidt trigger circuit to realize, accuracy rate height, the photoelectric counter that antijamming capability is strong.
This product mainly is made of light source, probe and main frame.Probe is made of photosensitive device, and main frame is by power supply, schmidt trigger circuit, and counting circuit, decoding scheme, driving circuit and charactron constitute.The resistance of photosensitive device changes with the change of the power that is radiated at the light above it, and after connecting with the mains, the variation of this resistance will produce a series of irregular pulses.And schmidt trigger circuit not only has the function that paired pulses carries out shaping, makes the edge of pulse become steep, and, under the voltage effect of certain amplitude, can realize the upset of pulse.This product has utilized the characteristic of this discriminating voltage amplitude of schmidt trigger circuit to make.The power supply of main frame is made up of transformer, rectification, filtering and mu balanced circuit.In order to reduce volume, the silicon bridge of rectification circuit adopts integrated silicon bridge.Consider and the problem of power supply compatibility that the elite 74HC132 of this product is as schmidt trigger circuit.74HC132 has the function of Sheffer stroke gate, if be low level at A, the wherein a certain end of B two input ends promptly, or is low simultaneously, and then output terminal C is a high level; If the input A, when the B two ends are high level simultaneously, then be output as low level.As shown in Figure 4, A, B end is become one, between power supply and ground, be connected in series sensor BG, variable resistor R
1And resistance R
2, resistance R is set
2Purpose be to prevent power supply and ground short circuit.Sensor promptly is the photosensitive device in the probe.The threshold voltage of schmidt trigger circuit is supply voltage V
DDHalf, so if realize upset, the input voltage that just must make trigger circuit is above 1/2V
DDUnder the situation of light source direct irradiation probe, the internal resistance of sensor is very little, at this moment can suitably regulate variable resistor R
2, the voltage that makes the AB end is greater than 1/2V
DD, this moment the trigger circuit output low levels; After object covered probe, it is big that the internal resistance of photosensitive device becomes rapidly, makes the input of AB end be reduced to trigger circuit because under the level that is determined that lags behind, like this, output terminal produces high level, for numeration is prepared.The function that counting and decoding then adopt CC4026 circuit, CC4026 circuit to have counting, decoding concurrently and drive.By the count pulse of schmidt trigger circuit output, export through counting, the decoding back of CC4026, and the driving LED charactron shows.Because the drive current of CC4026 is bigger, can directly drive charactron LED.In addition, have the zero clearing leg, be convenient to count zero clearing at CC4026 itself.
Not only cost is low, counting rate is fast for the utility model, circuit is simple, and accuracy rate height, antijamming capability are strong, can be applicable to the counting operation on the various streamlines.Its detection speed can reach one every millisecond, and probe source width 〉=2mm can adapt to-20 ℃ to 60 ℃ working environment, can continuous working.
Fig. 1: the circuit diagram of a kind of embodiment of this product
Fig. 2: the structure principle chart of counter
Fig. 3: power circuit
Fig. 4: schmidt trigger circuit schematic diagram
Fig. 5: counter-decoder circuit synoptic diagram
Claims (1)
- A kind of counter of forming by light source, probe and main frame, it is characterized in that main frame adopts 74HC132 as schmidt trigger circuit, two input ends of 74HC132 are become one, photosensitive device BG, variable resistor R1 and resistance R 2 on serial connection probe between power supply and the ground; Adopt CC4026 circuit decode circuit as counting, decoding, driving circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 90217287 CN2083307U (en) | 1990-08-06 | 1990-08-06 | Counter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 90217287 CN2083307U (en) | 1990-08-06 | 1990-08-06 | Counter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2083307U true CN2083307U (en) | 1991-08-21 |
Family
ID=4896306
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 90217287 Pending CN2083307U (en) | 1990-08-06 | 1990-08-06 | Counter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2083307U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106599986A (en) * | 2016-06-15 | 2017-04-26 | 湖南工业大学 | Automatic production line product counting sensing device |
-
1990
- 1990-08-06 CN CN 90217287 patent/CN2083307U/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106599986A (en) * | 2016-06-15 | 2017-04-26 | 湖南工业大学 | Automatic production line product counting sensing device |
| CN106599986B (en) * | 2016-06-15 | 2023-09-22 | 康思腾(成都)信息科技有限公司 | Automatic production line product counting sensing device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C57 | Notification of unclear or unknown address | ||
| DD01 | Delivery of document by public notice |
Applicant: Zhao Xu Document name: Notice of notice of application for preliminary approval of patent for utility models |
|
| C57 | Notification of unclear or unknown address | ||
| DD01 | Delivery of document by public notice |
Addressee: Liangyou Economic Consulting Co., Haidian Dist., Beijing Document name: Notice of grant of patent |
|
| AD01 | Patent right deemed abandoned | ||
| C20 | Patent right or utility model deemed to be abandoned or is abandoned |