CN216388188U - Access control system based on face recognition - Google Patents
Access control system based on face recognition Download PDFInfo
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- CN216388188U CN216388188U CN202123121495.8U CN202123121495U CN216388188U CN 216388188 U CN216388188 U CN 216388188U CN 202123121495 U CN202123121495 U CN 202123121495U CN 216388188 U CN216388188 U CN 216388188U
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Abstract
The application relates to an access control system based on face identification, it includes floodgate machine and face identification screen, face identification screen fixed mounting is on the floodgate machine, floodgate machine fixed mounting has the gate, install lighting assembly on the face identification screen, lighting assembly includes a plurality of light, the light is installed and is used for towards human one side at the face identification screen, the edge evenly distributed of face identification screen is followed to a plurality of lighting lamps, lighting assembly is coupled with and is used for controlling lighting assembly to get the infrared induction circuit who loses the electricity, infrared induction circuit includes infrared induction unit, the comparing unit, the control unit and switch unit. The access control system based on face recognition has the effect that the access control system based on face recognition can be normally used in the dark environment.
Description
Technical Field
The application relates to the technical field of face recognition, in particular to an access control system based on face recognition.
Background
The face recognition is a biological recognition technology for carrying out identity recognition based on face feature information of people, and is characterized in that a camera or a camera is used for collecting images or video streams containing faces, the faces are automatically detected and tracked in the images, and further the face feature recognition is carried out on the detected faces.
At present, the face recognition technology is widely applied to an access control system of an industrial park, a gate machine provided with an access control is often adopted at an entrance of the industrial park, a face recognition device is arranged on the upper surface of the gate machine, and a person in the industrial park can enter the park through face recognition.
However, the existing face recognition access control system has the following problems: under the dark environment of light such as dark, stand before face identification screen as the personnel in the industry garden, because the not enough characteristic information that leads to face identification screen unable discernment to obtain face causes the condition of unable discernment, inconvenient use under the not enough condition of light, consequently has certain improvement space.
SUMMERY OF THE UTILITY MODEL
In order to enable the face recognition device to be normally used in a dark environment, the application provides an access control system based on face recognition.
The application provides an access control system based on face identification adopts following technical scheme:
an access control system based on face recognition comprises a gate and a face recognition screen, wherein the face recognition screen is fixedly arranged on the gate, the gate is provided with a gate, an illumination assembly is arranged on the face recognition screen, the illumination assembly is coupled with an infrared induction circuit used for controlling the illumination assembly to be powered off, and the infrared induction circuit comprises an infrared induction unit, a comparison unit, a control unit and a switch unit;
the infrared sensing unit is used for detecting whether a person approaches the face recognition screen or not and outputting an infrared sensing signal;
the comparison unit is coupled with the infrared induction unit to receive the infrared induction signal, is provided with an infrared induction signal threshold value, and outputs an infrared induction comparison signal when the infrared induction signal is greater than the infrared induction signal threshold value;
the control unit is coupled with the comparison unit to receive the infrared induction comparison signal and output a control signal;
the switch unit is coupled to the control unit to output a switch signal when receiving the control signal, and the switch unit is connected in series in a power supply loop of the lighting assembly to output the switch signal to the lighting assembly.
By adopting the technical scheme, when personnel in an industrial park stand in front of the face recognition screen in a dark environment, the infrared sensing unit detects the personnel standing in front of the face recognition screen and outputs an infrared sensing signal to the comparison unit, the comparison unit realizes comparison with an infrared sensing signal threshold value when receiving the infrared sensing signal, when the infrared induction signal is larger than the infrared induction signal threshold value, the comparison unit outputs an infrared induction comparison signal to the control unit, the control unit outputs a control signal to the switch unit when receiving the infrared induction comparison signal, the switch unit outputs a switch signal to a power supply loop of the illumination assembly when receiving the control signal, the illumination assembly is powered on and lightened, and then make face identification screen can discern industrial park personnel's facial feature under the dark environment of light, realize face identification device and can normally use under the dark environment of light.
Optionally, the infrared sensing unit includes an infrared light emitting diode D1 and a photoelectric switch tube Q1, the infrared light emitting diode D1 is installed on the gate, an anode of the infrared light emitting diode D1 is coupled to a power voltage, a cathode of the infrared light emitting diode D1 is grounded, the photoelectric switch tube is coupled to the light emitting diode D1, a collector of the photoelectric switch tube Q1 is coupled to the comparing unit after being connected in series with the power voltage, and an emitter of the photoelectric switch tube Q1 is grounded.
Through adopting above-mentioned technical scheme, infrared light signal is sent in the circular telegram of infrared emitting diode D1, when no personnel before the face identification screen, photoelectric switch tube Q1 does not receive infrared light signal, photoelectric switch tube Q1 does not export infrared induction signal, when personnel stand before the face identification screen, infrared light signal reflection to photoelectric switch tube Q1, photoelectric switch tube Q1 is the on-state after receiving infrared light signal, photoelectric switch tube Q1 exports infrared induction signal, realize infrared detection function.
Optionally, the comparing unit includes a comparator N1 and a sliding resistor R3, a first input terminal of the comparator N1 is coupled to the collector of the photoelectric switch tube Q1, a second input terminal of the comparator N1 is coupled to the sliding terminal of the sliding resistor R3, one terminal of the sliding resistor R3 is coupled to the power voltage, the other terminal of the sliding resistor R3 is grounded, and an output terminal of the comparator N1 is coupled to the control unit.
By adopting the technical scheme, the first input end of the comparator N1 receives the voltage value of the collector of the photoelectric switch tube Q1, the second input end of the comparator N1 receives the threshold voltage value of the third resistor R3, and when the voltage value input by the first input end is smaller than the voltage value of the second input end, the output end of the comparator N1 outputs a high level; when the voltage value input by the first input end is greater than the voltage value input by the second input end, the output end of the comparator N1 outputs low level, and the function of comparing the magnitude of the infrared sensing signal is realized.
Optionally, the control unit includes a control chip U1, a first input terminal of the control chip U1 is coupled to the output terminal of the comparator N1 for receiving the infrared sensing comparison signal, and an output terminal of the control chip U1 is coupled to the switch unit for outputting the control signal to the switch unit.
By adopting the technical scheme, the infrared induction comparison signal output by the comparator N1 is received through the first input end of the control chip U1, and the control signal is output to the switch unit through the output end of the control chip U1, so that the function of controlling the switch is realized.
Optionally, the switch unit includes triode Q2 and circular telegram time delay relay KT1, triode Q2's base is coupled in order to receive control signal in control chip U1's output, triode Q2's projecting pole is coupled in mains voltage, triode Q2's collecting electrode ground connection, circular telegram time delay relay KT 1's coil and triode Q2's collecting electrode series connection back ground connection, circular telegram time delay relay KT1 includes time delay normally open contact switch KT1-1, time delay normally open contact switch KT1-1 establishes ties at lighting component's supply circuit.
Through adopting above-mentioned technical scheme, when triode Q2 received control signal, triode Q2's base output low level made triode Q2 switch on, circular telegram time delay relay KT 1's coil circular telegram makes time delay normally open contact switch KT1-1 be the closure state after the delay time count-down is received, makes lighting component's power supply circuit switch on, lighting component gets to the electricity and lights, realizes lighting component, gives face identification screen work and provides bright environment.
Optionally, the control unit further includes a photosensitive subunit, the photosensitive subunit includes a photosensitive resistor CdS, one end of the photosensitive resistor CdS is connected in series with the power voltage and then respectively coupled to the first input end and the second input end of the control chip U1, and the other end of the photosensitive resistor CdS is grounded.
By adopting the technical scheme, in daytime, the resistance value of the photosensitive resistor CdS is reduced due to illumination, the first input end and the second input end of the control chip U1 both input low levels, the output end of the control chip U1 is high level, the triode Q2 is not conducted, and the lighting assembly is powered off and cannot be lightened; if a person stands in front of the face recognition screen, the voltage of the first input end of the control chip U1 is increased to become high level, but the second input end of the control chip U1 is still low level, the output end of the control chip U1 is still high level, and the lighting assembly is powered off and cannot be turned on;
when the LED illumination device is used at night, the resistance value of the photosensitive resistor CdS is increased, so that the second input end of the control chip U1 inputs a high level, if no person stands in front of the face recognition screen, the first input end of the control chip U1 inputs a low level, the output end of the control chip U1 outputs a high level, the triode Q2 is not conducted, and the illumination assembly is powered off and cannot be lightened; when personnel stood before face identification screen, control chip U1's first input is the high level, makes control chip U1's output be the low level, and triode Q2 switches on, and lighting components gets electric and lights, realizes controlling lighting components even if face identification screen detects personnel and can not light yet when the day, reduces the power extravagant.
Optionally, the lighting assembly comprises a plurality of lighting lamps, the lighting lamps are installed on one side of the face recognition screen, which faces towards the human body, and the lighting lamps are uniformly distributed along the edge of the face recognition screen.
Through adopting above-mentioned technical scheme, a plurality of light are evenly installed at the edge of face identification screen, make the illuminating effect more even, and the face identification screen of being convenient for more discerns face facial feature.
Optionally, the top of the face recognition screen is fixedly provided with a light shielding plate, the light shielding plate is arc-shaped, and an opening of the light shielding plate faces downwards.
Through adopting above-mentioned technical scheme, when rainy day, the light screen plays the effect of keeping off the rain, can prevent that face identification screen from drenching with the rain, prolongs face identification screen's life, and under the highlight, the light screen plays the effect of being in the light, improves face identification's rate of accuracy.
In summary, the present application includes at least one of the following beneficial technical effects:
1. the lighting assembly is arranged in the face recognition screen, so that the face recognition screen can normally recognize the facial features of a human face in a dark environment;
2. the delay time is set through the electrifying delay relay KT1, so that the lighting assembly is prevented from being lighted by mistake due to the fact that a person passes in front of the face recognition screen, the lighting assembly is prevented from being lighted by mistake through the photosensitive unit even if the face recognition screen detects that the person does not light in the daytime, and the waste of a power supply is reduced;
3. can prevent through the light screen that face identification screen from drenching with the rain and intaking, prolong face identification screen's life, can also improve face identification's rate of accuracy under the highlight through the light screen.
Drawings
Fig. 1 is a structural diagram of an access control system according to an embodiment of the present application.
Fig. 2 is a partially enlarged view of a in fig. 1 of an embodiment of the present application.
Fig. 3 is a circuit diagram of an infrared sensing detection circuit according to an embodiment of the present application.
Description of reference numerals: 1. a gate machine; 2. a face recognition screen; 3. a gate; 4. a lighting assembly; 5. an infrared sensing unit; 6. a comparison unit; 7. a control unit; 71. a photosensitive subunit; 8. a switch unit.
Detailed Description
The present application is described in further detail below with reference to figures 1-3.
The embodiment of the application discloses access control system based on face recognition.
Referring to fig. 1 and 2, an access control system based on face identification includes floodgate machine 1 and face identification screen 2, and 2 fixed mounting of face identification screen are on floodgate machine 1, and 1 fixed mounting of floodgate machine has gate 3, installs lighting assembly 4 on the face identification screen 2, and lighting assembly 4 includes a plurality of lights, and the light is installed in 2 one sides towards the human body of face identification screen, and a plurality of lighting lamps are along the edge evenly distributed of face identification screen 2.
The top fixed mounting of face identification screen 2 has the light screen, and the light screen is the arc setting, and the opening of light screen is towards face identification screen 2 for face identification screen 2 keeps off rain and the shading.
Referring to fig. 3, an infrared sensing circuit for controlling the lighting assembly 4 to be de-energized is coupled to the lighting assembly 4, and includes an infrared sensing unit 5, a comparing unit 6, a control unit 7, and a switching unit 8.
The infrared sensing unit 5 is used for detecting whether a person passes through the face recognition screen 2 and outputs an infrared sensing signal, the infrared sensing unit 5 includes an infrared light emitting diode D1, an NPN-type photoelectric switch tube Q1, a first resistor R1 and a second resistor R2, the photoelectric switch tube Q1 is coupled to the infrared light emitting diode D1, an anode of the infrared light emitting diode D1 is connected in series with the first resistor R1, the other end of the first resistor R1 is coupled to a power voltage, a cathode of the infrared light emitting diode D1 is grounded, a collector of the photoelectric switch tube Q1 is coupled to the comparison unit 6 in series with the second resistor R2 to output the infrared sensing signal, the other end of the second resistor R2 is coupled to the power voltage, and an emitter of the photoelectric switch tube Q1 is grounded.
The comparing unit 6 is coupled to the infrared sensing unit 5 for outputting an infrared sensing comparison signal when receiving the infrared sensing signal, the comparing unit 6 includes a comparator N1 and a slide rheostat R3, a first input terminal of the comparator N1 is an inverting input terminal, a second input terminal of the comparator N1 is a positive input terminal, an inverting input terminal of the comparator N1 is coupled to the collector of the photo-electric switch tube Q1, a positive input terminal of the comparator N1 is coupled to the sliding terminal of the slide rheostat R3, one end of the slide rheostat R3 is coupled to a power voltage, the other end of the slide rheostat R3 is grounded, an output terminal of the comparator N1 is coupled to a fourth resistor R4, and the other end of the fourth resistor R4 is coupled to the control unit 7.
The control unit 7 is coupled to the comparison unit 6 to output a control signal when receiving an infrared sensing comparison signal, the control unit 7 includes a control chip U1 with a model number of 555, a fifth resistor R5 and a photosensitive subunit 71, the photosensitive subunit 71 includes a photosensitive resistor CdS made of cadmium sulfide, a second pin of the control chip U1 is a first input end, a sixth pin of the control chip U1 is a second input end, a third pin of the control chip U1 is an output end, a second pin of the control chip U1 is coupled to an output end of the comparator N1 to receive the infrared sensing comparison signal, a third pin of the control chip U1 is coupled to the switch unit 8 to output the control signal to the switch unit 8, one end of the photosensitive resistor CdS is connected in series with a power voltage and then is coupled to the second pin and the sixth pin of the control chip U1, the other end of the photosensitive resistor CdS is grounded, one end of the fifth resistor R5 is connected in series with the photosensitive resistor, the other end of the fifth resistor R5 is coupled to the power voltage, the first pin of the control chip U1 is grounded, and the fourth pin and the eighth pin of the control chip U1 are both coupled to the power voltage.
The switch unit 8 is coupled to the control unit 7 to output a switch signal when receiving the control signal, the switch unit 8 includes a PNP transistor Q2 and a power-on delay relay KT1, the power-on delay relay KT1 is provided with a delay time, a base of the transistor Q2 is coupled to a third pin of the control chip U1, a collector of the transistor Q2 is grounded, an emitter of the transistor Q2 is coupled to a power supply voltage, a coil of the power-on delay relay KT1 is grounded after being connected in series with the collector of the transistor Q2, the power-on delay relay KT1 includes a delay normally-open contact switch KT1-1, the delay normally-open contact switch KT1-1 is connected in series to a power supply loop of the lighting assembly 4,
specifically, when the triode Q2 receives a control signal, the triode Q2 is turned on, the coil of the energization delay relay KT1 is energized, the delay time set by the energization delay relay KT1 starts to count down and when the count down is received, the delay normally-open contact switch KT1-1 is closed, and the lighting component 4 is energized.
The implementation principle of the access control system based on face recognition in the embodiment of the application is as follows:
in the dark or weak light environment, the resistance value of the photo resistor CdS is increased, the sixth pin of the control chip U1 inputs a high level, when a person approaches the face recognition screen 2, the infrared light emitting diode D1 emits an infrared signal, the infrared signal is emitted to the photoelectric switch tube Q1 through a human body, the photoelectric switch tube Q1 is in a conducting state, the collector of the photoelectric switch tube Q1 outputs a low level, the voltage value input by the inverting input end of the comparator N1 is smaller than that of the non-inverting input end, the output end of the comparator N1 is a high level, the second pin of the control chip U1 inputs a high level, the third pin of the control chip U1 outputs a low level, the base of the triode Q2 inputs a low level, the triode Q2 is conducted, the coil of the KT1 is electrified when electrified, the KT1-1 is closed, the power supply loop of the illumination component 4 is conducted, a plurality of illumination lamps installed on the edge of the face recognition screen 2 are electrified and lighted, the face recognition screen 2 can recognize the facial features of the human face in a dark environment;
if no person approaches the face recognition screen 2, the photoelectric switch tube Q1 does not receive an infrared light signal, the photoelectric switch tube Q1 is in an off state, the collector of the photoelectric switch tube Q1 outputs a high level, the voltage value input by the inverting input end of the comparator N1 is greater than the voltage value input by the non-inverting input end, the output end of the comparator N1 is a low level, the second pin of the control chip U1 inputs a low level, the third pin of the control chip U1 outputs a high level, the triode Q2 is not turned on, and the lighting component 4 is turned off and is not turned on.
In the daytime, the resistance value of the photoresistor CdS is reduced by illumination, the sixth pin and the second pin of the control chip U1 are both input with low level, the third pin of the control chip U1 outputs high level, the triode Q2 is not conducted, the coil of the electrified delay relay KT1 is not electrified, the delay normally-open contact switch KT1-1 is disconnected, the illumination component 4 is in an off state when the illumination component is not electrified, if someone is close to the face recognition screen 2 in the daytime, the second pin of the control chip U1 inputs high level, but the sixth pin of the control chip U1 still inputs low level, the third pin of the control chip U1 outputs high level, the triode Q2 is not conducted, the power supply loop of the illumination component 4 is in off filling, the illumination component 4 is not lightened when the illumination component 4 is powered off, and the illumination component 4 is not lightened and wastes power.
The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.
Claims (8)
1. The utility model provides an access control system based on face identification which characterized in that: the intelligent gate comprises a gate machine (1) and a face recognition screen (2), wherein the face recognition screen (2) is fixedly arranged on the gate machine (1), a gate (3) is arranged on the gate machine (1), an illumination assembly (4) is arranged on the face recognition screen (2), the illumination assembly (4) is coupled with an infrared induction circuit for controlling the illumination assembly (4) to be powered off, and the infrared induction circuit comprises an infrared induction unit (5), a comparison unit (6), a control unit (7) and a switch unit (8);
the infrared sensing unit (5) is used for detecting whether a person approaches the face recognition screen (2) or not and outputting an infrared sensing signal;
the comparison unit (6) is coupled with the infrared induction unit (5) to receive the infrared induction signal, an infrared induction signal threshold value is arranged on the comparison unit (6), and when the infrared induction signal is greater than the infrared induction signal threshold value, the infrared induction comparison signal is output;
the control unit (7) is coupled with the comparison unit (6) to output a control signal when receiving the infrared induction comparison signal;
the switch unit (8) is coupled to the control unit (7) to receive the control signal and output a switch signal, and the switch unit (8) is connected in series in a power supply loop of the lighting assembly (4) to output the switch signal to the lighting assembly (4).
2. The access control system based on face recognition according to claim 1, characterized in that: the infrared induction unit (5) comprises an infrared light emitting diode D1 and a photoelectric switch tube Q1, the infrared light emitting diode D1 is installed on the gate (1), the anode of the infrared light emitting diode D1 is coupled to a power supply voltage, the cathode of the infrared light emitting diode D1 is grounded, the photoelectric switch tube is coupled to a light emitting diode D1, the collector of the photoelectric switch tube Q1 is coupled to the comparison unit (6) after being connected with the power supply voltage in series, and the emitter of the photoelectric switch tube Q1 is grounded.
3. The access control system based on face recognition according to claim 2, characterized in that: the comparison unit (6) comprises a comparator N1 and a slide rheostat R3, wherein a first input end of the comparator N1 is coupled to a collector electrode of the photoelectric switch tube Q1, a second input end of the comparator N1 is coupled to a sliding end of the slide rheostat R3, one end of the slide rheostat R3 is coupled to a power supply voltage, the other end of the slide rheostat R3 is grounded, and an output end of the comparator N1 is coupled to the control unit (7).
4. The access control system based on face recognition according to claim 3, characterized in that: the control unit (7) comprises a control chip U1, a first input end of the control chip U1 is coupled to the output end of the comparator N1 to receive the infrared induction comparison signal, and an output end of the control chip U1 is coupled to the switch unit (8) to output the control signal to the switch unit (8).
5. The access control system based on face recognition according to claim 4, characterized in that: the switch unit (8) comprises a triode Q2 and an electrified delay relay KT1, the base electrode of the triode Q2 is coupled with the output end of a control chip U1 to receive a control signal, the emitter electrode of the triode Q2 is coupled with a power supply voltage, the collector electrode of the triode Q2 is grounded, the coil of the electrified delay relay KT1 is grounded after being connected with the collector electrode of the triode Q2 in series, the electrified delay relay KT1 comprises a delay normally-open contact switch KT1-1, and the delay normally-open contact switch KT1-1 is connected with a power supply loop of the lighting assembly (4) in series.
6. The access control system based on face recognition according to claim 4, characterized in that: the control unit (7) further comprises a photosensitive subunit (71), the photosensitive subunit (71) comprises a photosensitive resistor CdS, one end of the photosensitive resistor CdS is connected with a power voltage in series and then is respectively coupled to a first input end and a second input end of the control chip U1, and the other end of the photosensitive resistor CdS is grounded.
7. The access control system based on face recognition according to claim 1, characterized in that: the illumination assembly (4) comprises a plurality of illumination lamps, the illumination lamps are installed on one side, used for facing a human body, of the face recognition screen (2), and the illumination lamps are evenly distributed along the edge of the face recognition screen (2).
8. The access control system based on face recognition according to claim 1, characterized in that: the top fixed mounting of face identification screen (2) has the light screen, the light screen is the arc, the opening of light screen is down.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123121495.8U CN216388188U (en) | 2021-12-13 | 2021-12-13 | Access control system based on face recognition |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123121495.8U CN216388188U (en) | 2021-12-13 | 2021-12-13 | Access control system based on face recognition |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216388188U true CN216388188U (en) | 2022-04-26 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202123121495.8U Active CN216388188U (en) | 2021-12-13 | 2021-12-13 | Access control system based on face recognition |
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| CN (1) | CN216388188U (en) |
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2021
- 2021-12-13 CN CN202123121495.8U patent/CN216388188U/en active Active
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