CN216926957U - Automatic optical detection circuit of adjusting - Google Patents
Automatic optical detection circuit of adjusting Download PDFInfo
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- CN216926957U CN216926957U CN202220199359.6U CN202220199359U CN216926957U CN 216926957 U CN216926957 U CN 216926957U CN 202220199359 U CN202220199359 U CN 202220199359U CN 216926957 U CN216926957 U CN 216926957U
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Abstract
The application is an automatic optical detection circuit who adjusts, relates to optical device detection technology field, including window comparing unit, go up threshold voltage unit, lower threshold voltage unit, go up voltage compensation unit and lower voltage compensation unit, the input of this detection circuit is regarded as to window comparing unit's input, window comparing unit still is connected with go up threshold voltage unit with lower threshold voltage unit is used for comparing input signal's maximum value and minimum respectively, go up threshold voltage unit with window comparing unit's tie point is provided with voltage compensation unit, lower threshold voltage unit with window comparing unit's tie point is provided with lower voltage compensation unit, can adjust the detection threshold value, makes things convenient for detection personnel to the detection and the debugging of different output signal of telecommunication for it is more simple and convenient to operate.
Description
Technical Field
The application relates to the technical field of optical device detection, relates to a detection circuit, and particularly relates to an automatically-adjusted optical detection circuit.
Background
Optical devices are widely used in life, such as photoelectric tubes, optical coupler periods and the like, wherein optical signals are converted into electric signals to be output by conversion of an indehiscent photoelectric effect, so that detection of output voltage or current signals in detection of the optical devices is an important step.
Disclosure of Invention
The utility model provides an automatically-adjusted optical detection circuit, which can adjust a detection threshold value, is convenient for detection personnel to detect and debug different output electric signals and enables the operation to be simpler and more convenient.
The technical scheme of the utility model is as follows:
an automatic-adjusting optical detection circuit comprises a window comparison unit, an upper threshold voltage unit, a lower threshold voltage unit, an upper voltage compensation unit and a lower voltage compensation unit, wherein the input end of the window comparison unit is used as the input end of the detection circuit, the window comparison unit is also connected with the upper threshold voltage unit and the lower threshold voltage unit and is respectively used for comparing the maximum value and the minimum value of an input signal, the upper voltage compensation unit is arranged at the connection point of the upper threshold voltage unit and the window comparison unit, and the lower voltage compensation unit is arranged at the connection point of the lower threshold voltage unit and the window comparison unit.
As a further optimization of the scheme, the window comparison unit includes a comparator U1 and a comparator U2, the reverse end of the comparator U1 is connected to the lower threshold voltage unit, the common end of the comparator U1 is connected to the reverse end of the comparator U2, the common end of the comparator U2 is connected to the upper threshold voltage unit, and the common ends of the comparators U1 and U2 are connected in series to serve as the output end of the detection circuit.
As a further optimization of the scheme, the upper threshold voltage unit comprises a rheostat RP2 and a resistor R2, a sliding end of the rheostat RP2 is connected with an upper threshold reference voltage source and a resistor R2, a resistance end of the rheostat RP2 is grounded, and the other end of the resistor R2 serves as an output end of the upper threshold reference voltage.
As a further optimization of the scheme, the lower threshold voltage unit comprises a rheostat RP1 and a resistor R1, a lower threshold reference voltage source and a resistor R1 are connected to a sliding end of the rheostat RP1, a resistance end of the rheostat RP1 is grounded, and the other end of the resistor R1 serves as an output end of the lower threshold reference voltage.
As a further optimization of the scheme, the lower voltage compensation unit includes a triode Q1 and a resistor R3, a compensation voltage source is connected to the base of the triode Q1, the base of the triode Q1 is also connected to the collector of the triode Q1 via a resistor R3, the collector of the triode Q1 is connected to the voltage source VCC, and the emitter of the triode Q1 is connected to the lower threshold voltage unit and the connection point of the window comparison unit.
As a further optimization of the scheme, the upper voltage compensation unit includes a triode Q2 and a resistor R4, a compensation voltage source is connected to the base of the triode Q2, the base of the triode Q2 is also connected to the collector of the triode Q2 through a resistor R4, the collector of the triode Q2 is connected to the voltage source VCC, and the emitter of the triode Q2 is connected to the connection point of the upper threshold voltage unit and the window comparison unit.
The working principle and the beneficial effects of the utility model are as follows:
the window comparison unit is used for receiving a voltage signal sent by an optical period to be tested so as to determine and compare a threshold value according to the setting of a window; the upper threshold voltage unit is used for determining the maximum threshold range of the period to be tested, the lower threshold voltage unit is used for determining the minimum threshold range of the period to be tested, and the upper voltage compensation unit and the lower voltage compensation unit are respectively used for finely adjusting the upper threshold voltage and the lower threshold voltage, so that different devices can be compared by using the thresholds in different ranges, and the operation of detection personnel is facilitated.
Drawings
The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
FIG. 1 is a schematic circuit diagram of the present invention;
fig. 2 is a schematic block diagram of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any inventive step, are intended to be within the scope of the present invention.
As shown in fig. 2 of the specification, an automatically adjusting optical detection circuit includes a window comparison unit, an upper threshold voltage unit, a lower threshold voltage unit, an upper voltage compensation unit, and a lower voltage compensation unit, where an input end of the window comparison unit is used as an input end of the detection circuit, the window comparison unit is further connected to the upper threshold voltage unit and the lower threshold voltage unit, and respectively used for comparing a maximum value and a minimum value of an input signal, an upper voltage compensation unit is disposed at a connection point of the upper threshold voltage unit and the window comparison unit, and a lower voltage compensation unit is disposed at a connection point of the lower threshold voltage unit and the window comparison unit.
The upper threshold voltage unit and the lower threshold voltage unit are respectively connected with an upper limit power supply and a lower limit power supply, and the voltage provided by the upper limit power supply is not less than the voltage provided by the lower limit power supply. The upper voltage compensation unit and the lower voltage compensation unit are connected with a compensation voltage source. When the optical device is tested, the upper limit and the lower limit are adjusted according to the theoretical threshold value of the optical device, and after the device is replaced, the adjustment of the size of the threshold value can be realized by adjusting the rheostat when the theoretical threshold value is changed.
As shown in the figure 1, the window comparison unit comprises a comparator U1 and a comparator U2, the reverse end of the comparator U1 is connected with the lower threshold voltage unit, the homodromous end of the comparator U1 is connected with the reverse end of the comparator U2, the homodromous end of the comparator U2 is connected with the upper threshold voltage unit, and the homodromous ends of the comparators U1 and U2 are connected in series to serve as the output end of the detection circuit. The upper threshold voltage unit comprises a rheostat RP2 and a resistor R2, the sliding end of the rheostat RP2 is connected with an upper threshold reference voltage source and a resistor R2, the resistance end of the rheostat RP2 is grounded, and the other end of the resistor R2 serves as an output end of the upper threshold reference voltage. The lower threshold voltage unit comprises a rheostat RP1 and a resistor R1, a lower threshold reference voltage source and a resistor R1 are connected to the sliding end of the rheostat RP1, the resistor end of the rheostat RP1 is grounded, and the other end of the resistor R1 serves as an output end of the lower threshold reference voltage. Lower voltage compensation unit includes triode Q1 and resistance R3, triode Q1's base is external to have compensation voltage source, triode Q1's base still connects through resistance R3 triode Q1's collecting electrode, triode Q1's collecting electrode connecting voltage source VCC, triode Q1's emitter is connected lower threshold voltage unit with the tie point of window comparison unit. Go up the voltage compensation unit and include triode Q2 and resistance R4, triode Q2's base is external to have compensation voltage source, triode Q2's base still connects through resistance R4 triode Q2's collecting electrode, triode Q2's collecting electrode connecting voltage source VCC, triode Q2's emitter is connected go up threshold voltage unit with the tie point of window comparison unit.
The rheostat RP1 and the rheostat RP2 can be used for adjusting the size range of the threshold voltage, and only the device range needs to be adjusted when different devices are measured. The compensation voltage source is composed of a triode amplifier and can adjust input current. When a more accurate threshold range of the device needs to be tested, the threshold range can be compensated, when the threshold of the device to be tested is reasonable, the window comparison unit outputs high potential voltage, otherwise, the window comparison unit outputs low potential. The circuit rear stage can be connected with a signal processing module and the like to output digital signals, and can be completed by a singlechip for example.
Each functional unit in the embodiments of the present invention may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit. The integrated unit can be realized in a form of hardware, and can also be realized in a form of a software functional unit. The integrated modules/units, if implemented in the form of software functional units and sold or used as separate products, may be stored in a computer readable storage medium. Based on such understanding, all or part of the flow in the method according to the embodiments of the present invention may also be implemented by a computer program to instruct related hardware, where the computer program may be stored in a computer readable storage medium, and when the computer program is executed by a processor, the computer program may implement the steps of the embodiments of the method. Wherein the computer program comprises computer program code, which may be in the form of source code, object code, an executable file or some intermediate form, etc. The computer readable medium may include: any entity or device capable of carrying computer program code, recording medium, U.S. disk, removable hard disk, magnetic diskette, optical disk, computer Memory, Read-Only Memory (ROM), Random Access Memory (RAM), electrical carrier wave signals, telecommunications signals, and software distribution media, etc. It should be noted that the computer-readable medium may contain suitable additions or subtractions depending on the requirements of legislation and patent practice in jurisdictions, for example, in some jurisdictions, computer-readable media may not include electrical carrier signals or telecommunication signals in accordance with legislation and patent practice.
The above-mentioned embodiments are only used for illustrating the technical solutions of the present invention, and not for limiting the same; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not substantially depart from the spirit and scope of the embodiments of the present invention, and are intended to be included within the scope of the present invention.
Claims (6)
1. The optical detection circuit capable of being automatically adjusted is characterized by comprising a window comparison unit, an upper threshold voltage unit, a lower threshold voltage unit, an upper voltage compensation unit and a lower voltage compensation unit, wherein the input end of the window comparison unit is used as the input end of the detection circuit, the window comparison unit is further connected with the upper threshold voltage unit and the lower threshold voltage unit and is respectively used for comparing the maximum value and the minimum value of an input signal, the upper voltage compensation unit is arranged at the connection point of the upper threshold voltage unit and the window comparison unit, and the lower voltage compensation unit is arranged at the connection point of the lower threshold voltage unit and the window comparison unit.
2. The self-adjusting optical detection circuit of claim 1, wherein the window comparator unit comprises a comparator U1 and a comparator U2, the reverse terminal of the comparator U1 is connected to the lower threshold voltage unit, the common terminal of the comparator U1 is connected to the reverse terminal of the comparator U2, the common terminal of the comparator U2 is connected to the upper threshold voltage unit, and the common terminals of the comparators U1 and U2 are connected in series as the output terminal of the detection circuit.
3. An automatically adjusting optical detection circuit as claimed in claim 1, wherein said upper threshold voltage unit comprises a rheostat RP2 and a resistor R2, an upper threshold reference voltage source and a resistor R2 are connected to a sliding end of said rheostat RP2, a resistance end of said rheostat RP2 is grounded, and the other end of said resistor R2 is used as an output end of said upper threshold reference voltage.
4. An automatically adjusting optical detection circuit according to claim 1, wherein the lower threshold voltage unit comprises a rheostat RP1 and a resistor R1, a lower threshold reference voltage source and a resistor R1 are connected to a sliding end of the rheostat RP1, a resistor end of the rheostat RP1 is grounded, and the other end of the resistor R1 is used as an output end of the lower threshold reference voltage.
5. The automatic adjusting optical detection circuit of claim 1, wherein the lower voltage compensation unit comprises a transistor Q1 and a resistor R3, a compensation voltage source is connected to the base of the transistor Q1, the base of the transistor Q1 is further connected to the collector of the transistor Q1 via a resistor R3, the collector of the transistor Q1 is connected to a voltage source VCC, and the emitter of the transistor Q1 is connected to the connection point of the lower threshold voltage unit and the window comparison unit.
6. The automatic adjusting optical detection circuit of claim 1, wherein the upper voltage compensation unit comprises a transistor Q2 and a resistor R4, a compensation voltage source is connected to the base of the transistor Q2, the base of the transistor Q2 is further connected to the collector of the transistor Q2 via a resistor R4, the collector of the transistor Q2 is connected to a voltage source VCC, and the emitter of the transistor Q2 is connected to the connection point of the upper threshold voltage unit and the window comparison unit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220199359.6U CN216926957U (en) | 2022-01-25 | 2022-01-25 | Automatic optical detection circuit of adjusting |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220199359.6U CN216926957U (en) | 2022-01-25 | 2022-01-25 | Automatic optical detection circuit of adjusting |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216926957U true CN216926957U (en) | 2022-07-08 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202220199359.6U Active CN216926957U (en) | 2022-01-25 | 2022-01-25 | Automatic optical detection circuit of adjusting |
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| Country | Link |
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| CN (1) | CN216926957U (en) |
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2022
- 2022-01-25 CN CN202220199359.6U patent/CN216926957U/en active Active
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