CN108759677B - Photoelectric sensor circuit and photoelectric sensor thereof - Google Patents
Photoelectric sensor circuit and photoelectric sensor thereof Download PDFInfo
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- CN108759677B CN108759677B CN201810774932.XA CN201810774932A CN108759677B CN 108759677 B CN108759677 B CN 108759677B CN 201810774932 A CN201810774932 A CN 201810774932A CN 108759677 B CN108759677 B CN 108759677B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B11/00—Measuring arrangements characterised by the use of optical techniques
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B11/00—Measuring arrangements characterised by the use of optical techniques
- G01B11/02—Measuring arrangements characterised by the use of optical techniques for measuring length, width or thickness
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Abstract
The invention discloses a photoelectric sensor circuit and a photoelectric sensor thereof, wherein one or both of an infrared receiving circuit and a state indicating circuit are arranged in parallel with a second branch, so that the operating current of an infrared transmitting tube comprises one or both of the operating currents of an infrared receiving tube and a state indicating lamp, the power supply current of a power supply is fully utilized, the heating and the loss of the photoelectric sensor are reduced under the condition of realizing the same induction sensitivity, or the energy of emitted light is enhanced under the condition of the same consumption current, the interference capability of the photoelectric sensor on ambient light is improved, and the operation and the action of the photoelectric sensor are more stable.
Description
Technical Field
The invention relates to the technical field of sensors, in particular to a photoelectric sensor circuit and a photoelectric sensor thereof.
Background
Photoelectric sensors are a type of detection sensor that can be used to detect the position, distance, etc. of a target object, and are widely used in the modern industrial field. Referring to fig. 1, the photoelectric sensor circuit is generally provided with an infrared transmitting tube TX and an infrared receiving tube RE, and part of the photoelectric sensor circuit is also provided with an indicator lamp D1, and the circuits where the general infrared transmitting tube TX, the infrared receiving tube RE and the indicator lamp D1 are all arranged in parallel, are directly connected with a power input end, and the running current directly flows back to the ground wire, so that the overall running current of the photoelectric sensor is larger, and the heating value and the loss are also larger.
Disclosure of Invention
In order to solve the problems, the invention aims to provide a photoelectric sensor circuit and a photoelectric sensor thereof, which can fully utilize the supply current of a power supply, reduce the heating and the loss of the photoelectric sensor and ensure more stable operation and action.
The invention solves the problems by adopting the following technical scheme:
a photosensor circuit comprising:
the power input end comprises a power anode and a power cathode;
The infrared emission tube is used for emitting infrared rays, an infrared emission loop is formed between the infrared emission tube and the power input end, and the infrared emission loop comprises a first branch where the infrared emission tube is located and a second branch connected in series with the first branch;
The infrared receiving circuit is provided with an infrared receiving tube, and the infrared receiving tube responds to infrared rays emitted by the infrared emitting tube to control the current on-off of the infrared receiving circuit;
The output control circuit is connected with the power input end, and is provided with a first switching tube for controlling the current of the output control circuit, and the control end of the first switching tube is connected with the infrared receiving circuit;
the state output circuit comprises a state output end and a state input end, and the state input end circuit is connected with the output control circuit;
The state indicator lamp is connected with the output control circuit, and the state indicator lamp and the first switch tube form a state indicator circuit;
the infrared receiving circuit and/or the status indicating circuit are connected in parallel with the second branch circuit.
Further, the status indication circuit further comprises a third resistor connected in series with the status indication lamp, and the status indication lamp, the third resistor and the first switch tube form the status indication circuit.
Further, the infrared receiving circuit is connected with the second branch in parallel, and the state indicating circuit is connected with the anode and the cathode of the power supply; or the state indicating circuit is connected with the second branch in parallel, and the infrared receiving circuit is connected with the anode and the cathode of the power supply; or the infrared receiving circuit and the state indicating circuit are connected in parallel with the second branch circuit.
A photoelectric sensor circuit includes
The power input end comprises a power anode and a power cathode;
The infrared emission tube is used for emitting infrared rays, an infrared emission loop is formed between the infrared emission tube and the power input end, and the infrared emission loop comprises a first branch where the infrared emission tube is located and a second branch connected in series with the first branch;
the infrared receiving circuit is provided with an infrared receiving tube, and the infrared receiving tube responds to the infrared rays emitted by the infrared emitting tube to control the current of the infrared receiving circuit; the infrared receiving circuit is connected with the second branch circuit in parallel;
The output control circuit is connected with the power input end, and is provided with a first switching tube for controlling the on-off of the current of the output control circuit, and the control end of the first switching tube is connected with the infrared receiving circuit;
the state output circuit comprises a state output end and a state input end, and the state input end circuit is connected with the output control circuit.
Further, the second branch includes a first resistor connected in series with the first branch between the power input terminals.
Further, the infrared receiving circuit further comprises a second resistor connected with the infrared transmitting tube in series, and the control end of the first switching tube is connected to the connection point of the second resistor and the infrared transmitting tube.
Further, the state output end of the state output circuit is connected with the state input end through a singlechip, a logic gate, an amplifier, a comparator or an analog-to-digital converter.
The photoelectric sensor with the photoelectric sensor circuit comprises a shell, wherein the shell comprises a light-emitting fork arm and a receiving fork arm, the infrared emission tube is arranged on the light-emitting fork arm, and the infrared receiving tube is arranged on the receiving fork arm.
The beneficial effects of the invention are as follows: according to the photoelectric sensor circuit and the photoelectric sensor thereof, one or both of the infrared receiving circuit and the state indicating circuit are/is arranged in parallel with the second branch, so that the running current of the infrared transmitting tube comprises one or both of the running current of the infrared receiving tube and the running current of the state indicating lamp, the power supply current of a power supply is fully utilized, the heating and the loss of the photoelectric sensor are reduced under the condition of realizing the same induction sensitivity, or the light emitting energy is enhanced under the condition of the same current consumption, the interference capability of the photoelectric sensor on ambient light is improved, and the running and the action of the photoelectric sensor are more stable.
Drawings
The invention is further described below with reference to the drawings and examples.
FIG. 1 is a schematic circuit diagram of the prior art;
FIG. 2 is a schematic circuit diagram of a first embodiment of the present invention;
FIG. 3 is a schematic circuit diagram of a second embodiment of the present invention;
FIG. 4 is a schematic circuit diagram of a third embodiment of the present invention;
FIG. 5 is a schematic circuit diagram of a fourth embodiment of the present invention;
FIG. 6 is a schematic circuit diagram of a fifth embodiment of the present invention;
FIG. 7 is a schematic circuit diagram of a sixth embodiment of the invention;
FIG. 8 is a schematic circuit diagram of an eighth embodiment of the invention;
fig. 9 is an overall external view of a photoelectric sensor of the present invention.
Detailed Description
The invention provides a photoelectric sensor circuit, comprising:
the power input end comprises a power anode and a power cathode;
An infrared transmitting tube TX for transmitting infrared rays, wherein an infrared transmitting loop 1 is formed between the infrared transmitting tube TX and a power input end, and the infrared transmitting loop 1 comprises a first branch 11 where the infrared transmitting tube TX is located and a second branch 12 connected in series with the first branch 11;
An infrared receiving circuit 2 provided with an infrared receiving tube RE, wherein the infrared receiving tube RE responds to infrared rays emitted by an infrared emitting tube TX to control the current of the infrared receiving circuit 2; when the infrared receiving tube RE does not receive the infrared rays emitted by the infrared emitting tube TX, the current of the infrared receiving circuit 2 is smaller; when the infrared receiving tube RE receives the infrared rays emitted by the infrared emitting tube TX, the current of the infrared receiving circuit 2 is larger;
The output control circuit 3 is connected with the power input end, the output control circuit 3 is provided with a first switching tube Q1 for controlling the on-off of the current of the output control circuit 3, and the control end of the first switching tube Q1 is connected with the infrared receiving circuit 2; the output control circuit 3 can be directly connected with the power input end or indirectly connected with the power input end, and the two connection modes are further described through specific embodiments;
The state output line 4 comprises a state output end O1 and a state input end, and the state input end line is connected with the output control line 3;
the state indicator lamp D1 is connected with the output control circuit 3, and the state indicator lamp D1 and the first switching tube Q1 form a state indicator circuit;
The infrared receiving circuit 2 and/or the status indicating circuit are connected in parallel with the second branch 12.
Further, the status indication circuit further includes a third resistor R3 connected in series with the status indicator lamp D1, where the status indicator lamp D1, the third resistor R3 and the first switching tube Q1 form a status indication circuit.
Further, the infrared receiving circuit 2 is connected in parallel with the second branch 12, and the status indicating circuit is connected with the positive electrode and the negative electrode of the power supply; or the state indicating circuit is connected with the second branch circuit 12 in parallel, and the infrared receiving circuit 2 is connected with the positive electrode and the negative electrode of the power supply; or the infrared receiving circuit 2 and the status indicating circuit are connected in parallel with the second branch 12.
Another photoelectric sensor circuit provided by the present invention includes:
the power input end comprises a power anode and a power cathode;
An infrared transmitting tube TX for transmitting infrared rays, wherein an infrared transmitting loop 1 is formed between the infrared transmitting tube TX and a power input end, and the infrared transmitting loop 1 comprises a first branch 11 where the infrared transmitting tube TX is located and a second branch 12 connected in series with the first branch 11;
An infrared receiving circuit 2 provided with an infrared receiving tube RE, wherein the infrared receiving tube RE responds to the infrared rays emitted by the infrared emitting tube TX to control the current of the infrared receiving circuit 2; the infrared receiving circuit 2 is connected with the second branch circuit 12 in parallel;
The output control circuit 3 is connected with the power input end, the output control circuit 3 is provided with a first switching tube Q1 for controlling the on-off of the current of the output control circuit 3, and the control end of the first switching tube Q1 is connected with the infrared receiving circuit 2;
The status output line 4 comprises a status output O1 and a status input, which is connected to the output control line 3.
Further, the second branch 12 comprises a first resistor R1 connected in series with the first branch 11 between the power supply inputs.
Further, the infrared receiving circuit 2 further includes a second resistor R2 connected in series with the infrared transmitting tube TX, and the control end of the first switching tube Q1 is connected to a connection point of the second resistor R2 and the infrared transmitting tube TX.
Further, the state output end O1 of the state output line 4 is connected to the state input end through a single chip microcomputer, a logic gate, an amplifier, a comparator or an analog-to-digital converter.
Referring to fig. 9, a photoelectric sensor applying the above photoelectric sensor circuit includes a housing 10, where the housing 10 includes a light emitting fork arm 101 and a receiving fork arm 102, the infrared emitting tube TX is disposed on the light emitting fork arm 101, the infrared receiving tube RE is disposed on the receiving fork arm 102, and a status indicator lamp D1 is further disposed on the housing 10.
According to the photoelectric sensor circuit and the photoelectric sensor thereof, one or both of the infrared receiving circuit 2 and the state indicating circuit are/is arranged in parallel with the second branch 12, so that the running current of the infrared transmitting tube TX comprises one or both of the running currents of the infrared receiving tube RE and the state indicating lamp D1, the power supply current of a power supply is fully utilized, the heating and the loss of the photoelectric sensor are reduced under the condition of realizing the same induction sensitivity, or the light emitting energy is enhanced under the condition of the same current consumption, the interference capability of the photoelectric sensor on ambient light is improved, and the running and the action of the photoelectric sensor are more stable.
The present invention will be described in further detail with reference to examples, but embodiments of the present invention are not limited thereto.
Example 1
Referring to fig. 2, a photoelectric sensor circuit includes a power input terminal, an infrared emission circuit 1, an infrared receiving circuit 2, an output control circuit 3, a status output circuit 4 and a status indicator lamp D1;
the power input end comprises a power positive electrode P+ and a power negative electrode P-, the infrared receiving circuit 2 comprises a first branch 11 formed by an infrared transmitting tube TX and a second branch 12 formed by a first resistor R1, the power positive electrode P+ is connected with the first resistor R1, the first resistor R1 is connected with the infrared transmitting tube TX, and the infrared transmitting tube TX is connected with the power negative electrode P-;
The infrared receiving circuit 2 comprises a second resistor R2 and an infrared receiving tube RE, the positive electrode P+ of the power supply is connected with the second resistor R2, the second resistor R2 is connected with the infrared receiving tube RE, the infrared receiving tube RE is connected to the connection point of the first resistor R1 and the infrared transmitting tube TX, at this time, the infrared receiving circuit 2 is connected with the second branch 12 in parallel, and the running current conducted by the infrared receiving tube RE when receiving infrared light emitted by the infrared transmitting tube TX is converged into the infrared transmitting tube TX from the connection point of the first resistor R1 and the infrared transmitting tube TX;
the output control circuit 3 comprises a first switch tube Q1, a fourth resistor R4 and a fifth resistor R5, wherein the positive electrode P+ of the power supply is connected with the first switch tube Q1, the first switch tube Q1 is connected with the fourth resistor R4, the fourth resistor R4 is connected with the fifth resistor R5, the fifth resistor R5 is connected with the negative electrode P-of the power supply, the control end of the first switch tube Q1 is also connected to the connection point of the second resistor R2 and the infrared receiving tube RE, and at the moment, the first switch tube Q1 is controlled by the infrared receiving circuit 2;
The state output circuit 4 comprises a state output end O1, a second switching tube Q2 and a state input end, wherein the state output end O1 is connected with the second switching tube Q2, the second switching tube Q2 is connected with a power negative electrode P-, a control end of the second switching tube Q2 is the state input end, and the state input end is connected to a connection point of the fourth resistor R4 and the fifth resistor R5;
one end of the status indicator lamp D1 is connected to the connection point of the first switch tube Q1 and the fourth resistor R4, the other end of the status indicator lamp D1 is connected to the negative electrode P-of the power supply, and a third resistor R3 connected in series with the status indicator lamp D1 is further arranged for protecting the status indicator lamp D1.
Example two
Referring to fig. 3, a photoelectric sensor circuit includes a power input terminal, an infrared emission circuit 1, an infrared receiving circuit 2, an output control circuit 3, a status output circuit 4 and a status indicator lamp D1;
the power input end comprises a power positive electrode P+ and a power negative electrode P-, the infrared receiving circuit 2 comprises a first branch 11 formed by an infrared transmitting tube TX and a second branch 12 formed by a first resistor R1, the power positive electrode P+ is connected with the first resistor R1, the first resistor R1 is connected with the infrared transmitting tube TX, and the infrared transmitting tube TX is connected with the power negative electrode P-;
The infrared receiving circuit 2 comprises a second resistor R2 and an infrared receiving tube RE, wherein the positive electrode P+ of the power supply is connected with the second resistor R2, the second resistor R2 is connected with the infrared receiving tube RE, and the infrared receiving tube RE is connected to the negative electrode P-of the power supply;
the output control circuit 3 comprises a first switch tube Q1, a fourth resistor R4 and a fifth resistor R5, wherein the positive electrode P+ of the power supply is connected with the first switch tube Q1, the first switch tube Q1 is connected with the fourth resistor R4, the fourth resistor R4 is connected with the fifth resistor R5, the fifth resistor R5 is connected with the negative electrode P-of the power supply, the control end of the first switch tube Q1 is also connected to the connection point of the second resistor R2 and the infrared receiving tube RE, and at the moment, the first switch tube Q1 is controlled by the infrared receiving circuit 2;
The state output circuit 4 comprises a state output end O1, a second switching tube Q2 and a state input end, wherein the state output end O1 is connected with the second switching tube Q2, the second switching tube Q2 is connected with a power negative electrode P-, a control end of the second switching tube Q2 is the state input end, and the state input end is connected to a connection point of the fourth resistor R4 and the fifth resistor R5;
One end of the status indicator lamp D1 is connected to the connection point of the first switch tube Q1 and the fourth resistor R4, the other end of the status indicator lamp D1 is connected to the connection point of the first resistor R1 and the infrared emission tube TX, a third resistor R3 connected in series with the status indicator lamp D1 is further arranged for protecting the status indicator lamp D1, at this time, the second switch tube Q2, the third resistor R3 and the status indicator lamp D1 form a status indicator line, the status indicator line is connected with the second branch 12 in parallel, the infrared receiving tube RE is conducted when receiving infrared light emitted by the infrared emission tube TX, the first switch tube Q1 is conducted, the status indicator line is electrified to enable the status indicator lamp D1 to be electrified, and operating current of the status indicator lamp D1 is converged into the infrared emission tube TX from the connection point of the first resistor R1 and the infrared emission tube TX.
Example III
Referring to fig. 4, a photoelectric sensor circuit includes a power input terminal, an infrared emission circuit 1, an infrared receiving circuit 2, an output control circuit 3, a status output circuit 4 and a status indicator lamp D1;
the power input end comprises a power positive electrode P+ and a power negative electrode P-, the infrared receiving circuit 2 comprises a first branch 11 formed by an infrared transmitting tube TX and a second branch 12 formed by a first resistor R1, the power positive electrode P+ is connected with the first resistor R1, the first resistor R1 is connected with the infrared transmitting tube TX, and the infrared transmitting tube TX is connected with the power negative electrode P-;
The infrared receiving circuit 2 comprises a second resistor R2 and an infrared receiving tube RE, the positive electrode P+ of the power supply is connected with the second resistor R2, the second resistor R2 is connected with the infrared receiving tube RE, the infrared receiving tube RE is connected to the connection point of the first resistor R1 and the infrared transmitting tube TX, at this time, the infrared receiving circuit 2 is connected with the second branch 12 in parallel, and the running current conducted by the infrared receiving tube RE when receiving infrared light emitted by the infrared transmitting tube TX is converged into the infrared transmitting tube TX from the connection point of the first resistor R1 and the infrared transmitting tube TX;
the output control circuit 3 comprises a first switch tube Q1, a fourth resistor R4 and a fifth resistor R5, wherein the positive electrode P+ of the power supply is connected with the first switch tube Q1, the first switch tube Q1 is connected with the fourth resistor R4, the fourth resistor R4 is connected with the fifth resistor R5, the fifth resistor R5 is connected with the negative electrode P-of the power supply, the control end of the first switch tube Q1 is also connected to the connection point of the second resistor R2 and the infrared receiving tube RE, and at the moment, the first switch tube Q1 is controlled by the infrared receiving circuit 2;
The state output circuit 4 comprises a state output end O1, a second switching tube Q2 and a state input end, wherein the state output end O1 is connected with the second switching tube Q2, the second switching tube Q2 is connected with a power negative electrode P-, a control end of the second switching tube Q2 is the state input end, and the state input end is connected to a connection point of the fourth resistor R4 and the fifth resistor R5;
One end of the status indicator lamp D1 is connected to the connection point of the first switch tube Q1 and the fourth resistor R4, the other end of the status indicator lamp D1 is connected to the connection point of the first resistor R1 and the infrared emission tube TX, a third resistor R3 connected in series with the status indicator lamp D1 is further arranged for protecting the status indicator lamp D1, at this time, the second switch tube Q2, the third resistor R3 and the status indicator lamp D1 form a status indicator line, the status indicator line is connected with the second branch 12 in parallel, the infrared receiving tube RE is conducted when receiving infrared light emitted by the infrared emission tube TX, the first switch tube Q1 is conducted, the status indicator line is electrified to enable the status indicator lamp D1 to be electrified, and operating current of the status indicator lamp D1 is converged into the infrared emission tube TX from the connection point of the first resistor R1 and the infrared emission tube TX.
Example IV
Referring to fig. 5, a photoelectric sensor circuit includes a power input terminal, an infrared emission circuit 1, an infrared receiving circuit 2, an output control circuit 3, a status output circuit 4, and a status indicator lamp D1;
The power input end comprises a power positive electrode P+ and a power negative electrode P-, the infrared receiving circuit 2 comprises a first branch 11 formed by an infrared transmitting tube TX and a second branch 12 formed by a first resistor R1, the power positive electrode P+ is connected with the infrared transmitting tube TX, the infrared transmitting tube TX is connected with the first resistor R1, and the first resistor R1 is connected with the power negative electrode P-;
the infrared receiving circuit 2 comprises a second resistor R2 and an infrared receiving tube RE, the connection point of the infrared transmitting tube TX and the first resistor R1 is connected with the second resistor R2, the second resistor R2 is connected with the infrared receiving tube RE, the infrared receiving tube RE is connected with a power negative electrode P-, at the moment, the infrared receiving circuit 2 is connected with the second branch 12 in parallel, the infrared receiving tube RE is conducted when receiving infrared light emitted by the infrared transmitting tube TX, and a part of running current of the infrared transmitting tube TX is shunted to the infrared receiving circuit 2 to serve as conducting current of the infrared receiving tube RE;
The output control circuit 3 comprises a first switch tube Q1, a fourth resistor R4 and a fifth resistor R5, wherein the connection point of the infrared transmitting tube TX and the first resistor R1 is connected with the first switch tube Q1, the first switch tube Q1 is connected with the fourth resistor R4, the fourth resistor R4 is connected with the fifth resistor R5, the fifth resistor R5 is connected with a power negative electrode P-, the control end of the first switch tube Q1 is also connected to the connection point of the second resistor R2 and the infrared receiving tube RE, and at the moment, the first switch tube Q1 is controlled by the infrared receiving circuit 2;
The state output circuit 4 comprises a state output end O1, a second switching tube Q2 and a state input end, wherein the state output end O1 is connected with the second switching tube Q2, the second switching tube Q2 is connected with a power negative electrode P-, a control end of the second switching tube Q2 is the state input end, and the state input end is connected to a connection point of the fourth resistor R4 and the fifth resistor R5;
One end of the status indicator lamp D1 is connected to the connection point of the first switch tube Q1 and the fourth resistor R4, the other end of the status indicator lamp D1 is connected to the negative electrode P-of the power supply, a third resistor R3 connected in series with the status indicator lamp D1 is further arranged, at this time, the second switch tube Q2, the third resistor R3 and the status indicator lamp D1 form a status indicator line, the status indicator line is connected in parallel with the second branch 12, the infrared receiving tube RE is conducted when receiving infrared light emitted by the infrared emitting tube TX, the first switch tube Q1 is conducted, the status indicator line is conducted, the status indicator lamp D1 is conducted, and a part of running current of the infrared emitting tube TX is shunted to the status indicator line to serve as conducting current of the status indicator lamp D1.
Example five
Referring to fig. 6, a photoelectric sensor circuit provided in this embodiment is that some protection resistors and a stable starting circuit 5 are added on the basis of the third embodiment, specifically, the stable starting circuit 5 includes a third switching tube Q3 and a sixth resistor R6, a power positive electrode p+ is connected to a second resistor R2 through the third switching tube Q3, the power positive electrode p+ is also connected to a first resistor R1 through the sixth resistor R6, and a control end of the third switching tube Q3 is connected to a connection point between the sixth resistor R6 and the first resistor R1;
The infrared receiving tube RE is connected to a connection point of the first resistor R1 and the infrared transmitting tube TX, and the control end of the first switching tube Q1 is connected to the connection point of the second resistor R2 and the seventh resistor R7; the system also comprises an eighth resistor R8 connected in parallel with the two ends of the status indicator lamp D1; and the power supply also comprises a ninth resistor R9, one end of the ninth resistor R9 is connected to the connection point of the second resistor R2 and the seventh resistor R7, and the other end of the ninth resistor R9 is connected to the negative electrode P-of the power supply.
The protection resistor and the stable starting circuit 5 added in this embodiment are not only applicable to the third embodiment, but also can be added in the same way in other embodiments, and will not be described in detail here.
Example six
Referring to fig. 7, the present embodiment further provides a photosensor circuit of the status indicator light D1, which includes a power input terminal, an infrared emission circuit 1, an infrared receiving circuit 2, an output control circuit 3 and a status output circuit 4;
the power input end comprises a power positive electrode P+ and a power negative electrode P-, the infrared receiving circuit 2 comprises a first branch 11 formed by an infrared transmitting tube TX and a second branch 12 formed by a first resistor R1, the power positive electrode P+ is connected with the first resistor R1, the first resistor R1 is connected with the infrared transmitting tube TX, and the infrared transmitting tube TX is connected with the power negative electrode P-;
The infrared receiving circuit 2 comprises a second resistor R2 and an infrared receiving tube RE, the positive electrode P+ of the power supply is connected with the second resistor R2, the second resistor R2 is connected with the infrared receiving tube RE, the infrared receiving tube RE is connected to the connection point of the first resistor R1 and the infrared transmitting tube TX, at this time, the infrared receiving circuit 2 is connected with the second branch 12 in parallel, and the running current conducted by the infrared receiving tube RE when receiving infrared light emitted by the infrared transmitting tube TX is converged into the infrared transmitting tube TX from the connection point of the first resistor R1 and the infrared transmitting tube TX;
the output control circuit 3 comprises a first switch tube Q1, a fourth resistor R4 and a fifth resistor R5, wherein the positive electrode P+ of the power supply is connected with the first switch tube Q1, the first switch tube Q1 is connected with the fourth resistor R4, the fourth resistor R4 is connected with the fifth resistor R5, the fifth resistor R5 is connected with the negative electrode P-of the power supply, the control end of the first switch tube Q1 is also connected to the connection point of the second resistor R2 and the infrared receiving tube RE, and at the moment, the first switch tube Q1 is controlled by the infrared receiving circuit 2;
the state output circuit 4 comprises a state output end O1, a second switching tube Q2 and a state input end, wherein the state output end O1 is connected with the second switching tube Q2, the second switching tube Q2 is connected with a power negative electrode P-, a control end of the second switching tube Q2 is the state input end, and the state input end is connected to a connection point of the fourth resistor R4 and the fifth resistor R5.
Example seven
The present embodiment provides the positive-negative inversion mirror circuit of the fifth embodiment, and only the following conversion is required for the photosensor circuit in fig. 6: the positive electrode P+ of the power supply and the negative electrode of the power supply are exchanged; the first switching tube Q1 and the third switching tube Q3 originally adopt PNP type triodes, and are changed into NPN type triodes; the second switching tube Q2 adopts NPN triode originally, change PNP triode now; the positive and negative directions of the installation of the infrared transmitting tube TX, the infrared receiving tube RE and the status indicator lamp D1 are reversed.
Similarly, the positive-negative inversion mirror image circuits of the first to fourth embodiments and the sixth embodiment can be obtained correspondingly by referring to the conversion method.
Example eight
Referring to fig. 8, the present embodiment provides another implementation of the state output line 4, where the state output terminal O1 of the state output line 4 is connected to the state input terminal through a logic gate, specifically, the state output line 4 employs an exclusive or gate H8, one input terminal of the exclusive or gate H8 is connected to the connection point of the first switching tube Q1 and the fourth resistor R4, the other input terminal is the high-low level input terminal IN1, and the state output terminal O1 is connected to the output terminal of the exclusive or gate H8.
The state output circuit 4 may be a single chip microcomputer, a comparator or an analog-to-digital converter, besides the amplifier circuit described in fig. 1 to 7 and the logic gate described in fig. 8, which are connected to the state output terminal O1 and the output control circuit 3, and those skilled in the art may implement the state output circuit without any inventive effort.
The present invention is not limited to the above embodiments, but is merely preferred embodiments of the present invention, and the present invention should be construed as being limited to the above embodiments as long as the technical effects of the present invention are achieved by the same means.
Claims (10)
1. A photosensor circuit, comprising:
the power input end comprises a power anode and a power cathode;
The infrared ray transmitting Tube (TX) is used for transmitting infrared rays, an infrared ray transmitting loop (1) is formed between the infrared ray transmitting Tube (TX) and the power input end, and the infrared ray transmitting loop (1) comprises a first branch (11) where the infrared ray transmitting Tube (TX) is located and a second branch (12) connected in series with the first branch (11);
an infrared receiving circuit (2) provided with an infrared receiving tube (RE), wherein the infrared receiving tube (RE) responds to infrared rays emitted by an infrared emitting Tube (TX) to control the current of the infrared receiving circuit (2);
The output control circuit (3) is connected with the power input end, the output control circuit (3) is provided with a first switching tube (Q1) for controlling the on-off of the current of the output control circuit (3), and the control end of the first switching tube (Q1) is connected with the infrared receiving circuit (2);
A state output line (4) comprising a state output (O1) and a state input, said state input line being connected to the output control line (3);
A status indicator lamp (D1) connected with the output control circuit (3), wherein the status indicator lamp (D1) and the first switch tube (Q1) form a status indicator circuit;
The infrared receiving circuit (2) and/or the status indicating circuit are connected in parallel with the second branch (12) so that the operating current of the infrared transmitting Tube (TX) contains one or both of the operating currents of the infrared receiving tube (RE) and the status indicating lamp (D1).
2. A photosensor circuit according to claim 1, characterized in that the status indication line further comprises a third resistor (R3) in series with the status indicator light (D1), the third resistor (R3) and the first switching tube (Q1) constituting the status indication line.
3. A photosensor circuit according to claim 1 or 2, characterized in that the infrared receiving line (2) is connected in parallel with the second branch (12), the status indicating line being connected to the positive and negative poles of the power supply.
4. A photosensor circuit according to claim 1 or 2, characterized in that the status indication line is connected in parallel with the second branch (12), the infrared receiving line (2) being connected to the positive and negative poles of the power supply.
5. A photosensor circuit according to claim 1 or 2, characterized in that the infrared receiving line (2) and the status indicating line are both connected in parallel with the second branch (12).
6. A photosensor circuit, comprising:
the power input end comprises a power anode and a power cathode;
The infrared ray transmitting Tube (TX) is used for transmitting infrared rays, an infrared ray transmitting loop (1) is formed between the infrared ray transmitting Tube (TX) and the power input end, and the infrared ray transmitting loop (1) comprises a first branch (11) where the infrared ray transmitting Tube (TX) is located and a second branch (12) connected in series with the first branch (11);
An infrared receiving circuit (2) provided with an infrared receiving tube (RE), wherein the infrared receiving tube (RE) responds to infrared rays emitted by the infrared emitting Tube (TX) to control the current of the infrared receiving circuit (2); the infrared receiving circuit (2) is connected in parallel with the second branch circuit (12) so that the operating current of the infrared transmitting Tube (TX) comprises the operating current of the infrared receiving tube (RE);
The output control circuit (3) is connected with the power input end, the output control circuit (3) is provided with a first switching tube (Q1) for controlling the on-off of the current of the output control circuit (3), and the control end of the first switching tube (Q1) is connected with the infrared receiving circuit (2);
and the state output line (4) comprises a state output end (O1) and a state input end, and the state input end line is connected with the output control line (3).
7. A photosensor circuit according to claim 1 or 6, characterized in that the second branch (12) comprises a first resistor (R1) connected in series with the first branch (11) between the power supply inputs.
8. A photosensor circuit according to claim 1 or 6, characterized in that the infrared receiving circuit (2) further comprises a second resistor (R2) connected in series with the infrared transmitting Tube (TX), the control terminal of the first switching tube (Q1) being connected to the connection point of the second resistor (R2) and the infrared transmitting Tube (TX).
9. A photosensor circuit according to claim 1 or 6, characterized in that the state output (O1) of the state output line (4) is connected to the state input via a single-chip microcomputer, a logic gate, an amplifier, a comparator or an analog-to-digital converter.
10. A photoelectric sensor employing the photoelectric sensor circuit according to any one of claims 1 to 9, characterized by comprising a housing (10), said housing (10) comprising a light emitting yoke (101) and a receiving yoke (102), said infrared emitting Tube (TX) being arranged on said light emitting yoke (101) and said infrared receiving tube (RE) being arranged on said receiving yoke (102).
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| CN2018106671506 | 2018-06-25 |
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