CN203761639U - Control circuit of night lighting for monitoring equipment - Google Patents
Control circuit of night lighting for monitoring equipment Download PDFInfo
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- CN203761639U CN203761639U CN201320893361.4U CN201320893361U CN203761639U CN 203761639 U CN203761639 U CN 203761639U CN 201320893361 U CN201320893361 U CN 201320893361U CN 203761639 U CN203761639 U CN 203761639U
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- 238000012544 monitoring process Methods 0.000 title abstract 3
- 238000005286 illumination Methods 0.000 claims abstract description 15
- 238000001514 detection method Methods 0.000 claims abstract description 7
- 239000003990 capacitor Substances 0.000 claims description 66
- 206010070834 Sensitisation Diseases 0.000 claims description 24
- 230000008313 sensitization Effects 0.000 claims description 24
- 230000000087 stabilizing effect Effects 0.000 claims description 24
- 238000003384 imaging method Methods 0.000 abstract description 13
- 230000000007 visual effect Effects 0.000 abstract description 5
- 230000001276 controlling effect Effects 0.000 description 8
- 241000276489 Merlangius merlangus Species 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
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- 230000004048 modification Effects 0.000 description 2
- 230000004308 accommodation Effects 0.000 description 1
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- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 230000008447 perception Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B20/00—Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps
- Y02B20/40—Control techniques providing energy savings, e.g. smart controller or presence detection
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Abstract
The utility model belongs to the technical field of security and protection imaging, and especially relates to a control circuit of night lighting for monitoring equipment. The control circuit includes a master control circuit which is used for transmitting a PWM control signal, a first control circuit which is used for controlling a first controllable constant-current source switch, a second control circuit which is used for controlling a second controllable constant-current source switch, a third control circuit which is used for controlling a third controllable constant-current source switch, and a detection circuit which is used for detecting external light intensity. The first control circuit, the second control circuit, the third control circuit and the detection circuit are connected with the master control circuit respectively. The control circuit of night lighting for the monitoring equipment detects the external light intensity through the detection circuit. The control circuit of night lighting, through the subordinate control circuits, when the light is weak, switches on a power supply to start an auxiliary illumination tool so as to enable clear imaging in the weak light, and when the light is strong, switches off the power supply to turn off the auxiliary illumination tool so as to prevent whitened imaging in the strong light, thereby achieving the optimal visual effect.
Description
Technical field
The utility model belongs to security protection technical field of imaging, relates in particular to a kind of control circuit of watch-dog night illumination.
Background technology
At security protection and other imaging devices during at nighttime imaging, use the servicing lighting such as infrared, laser, white illuminator, still, while using servicing lighting, in closely time, can produce hot spot, cause image whiting, can not normally differentiate the details of object, in the time of medium and long distance, when the irradiation water surface, glass etc. have the object of reflecting effect, also can be reflected into camera lens because of a large amount of auxiliary lights, cause into image distortion and can not differentiate.
Prior art is to carry out two-stage adjusting by the multiplication factor of camera lens, by the multiplication factor of software detection camera lens, in the time exceeding certain multiple, starts distance light, starts at ordinary times dipped beam.Method comprises following two kinds now:
1) judge that camera lens multiplication factor changes lamp group, in the time of little multiplication factor, turn on one group of lamp, in the time of large multiplication factor, turned on another group lamp.
2) obtain multiplication factor and regulate the brightness of lamp, light intensity increases along with the increase of multiplication factor.
These two kinds all do not manipulate personnel's participation, have departed from the complex illumination condition of prevailing circumstances, and people must be nearby for thinking little multiplication factor when, and large multiplication factor must be at a distance, more stiff and can not adapt to accommodation.In fact luminous intensity and multiplication factor are irrelevant, and artificial adjusting kept, and therefore, are regulated and can not be solved dipped beam imaging whiting problem, and can not preserve memory light intensity by the multiplication factor of camera lens.
Utility model content
The utility model embodiment provides a kind of control circuit of watch-dog night illumination, is intended to solve existing equipment and can not solves the problem of dipped beam imaging whiting.
The utility model embodiment is achieved in that a kind of control circuit of watch-dog night illumination, comprising:
For sending the governor circuit of pwm control signal, for controlling the first control circuit of the first controlled constant current source switch, for controlling the second control circuit of the second controlled constant current source switch, for controlling the 3rd control circuit of the 3rd controlled constant current source switch, and for detection of the testing circuit of extraneous light intensity; Described first control circuit, second control circuit, the 3rd control circuit and testing circuit are connected with governor circuit respectively.
Preferably, described governor circuit comprises:
CPU, model is STC12C5A60S2, wherein, the pin one 2V_IN of described CPU is connected with first control circuit, second control circuit and the 3rd control circuit respectively, the pin PO4_PWM3 of described CPU is connected with the 3rd control circuit, the pin PO3_PWM2 of described CPU is connected with second control circuit, and the pin PO2_PWM1 of described CPU is connected with first control circuit, and the pin CDS_CHECK of described CPU is connected with described testing circuit.
Preferably, described first control circuit comprises:
CPU, model is STC12C5A60S2, wherein, the pin one 2V_IN of described CPU is connected with first control circuit, second control circuit and the 3rd control circuit respectively, the pin PO4_PWM3 of described CPU is connected with the 3rd control circuit, the pin PO3_PWM2 of described CPU is connected with second control circuit, and the pin PO2_PWM1 of described CPU is connected with first control circuit, and the pin CDS_CHECK of described CPU is connected with described testing circuit.
Preferably, described second control circuit comprises:
Voltage stabilizing didoe D2, resistance R 1, inductance L 2, capacitor C 2, capacitor C 4 and controlled constant-current source U2, controlled constant-current source U2 model is T6322, wherein, one end of resistance R 1 is connected with the negative electrode of pin one 2V_IN, the voltage stabilizing didoe D2 of CPU, the pin 7 of controlled constant-current source U2, one end of capacitor C 2, one end, first control circuit and the 3rd control circuit of capacitor C 4 respectively, and the other end of resistance R 1 is connected with the pin 8 anodal and controlled constant-current source U2 of the 1st road secondary light source respectively; The anode of voltage stabilizing didoe D2 is connected with the pin 4 of the pin 3 of controlled constant-current source U2, controlled constant-current source U2 and one end of inductance L 2 respectively; The other end of inductance L 2 is connected with the negative pole of the 1st road secondary light source; The other end of capacitor C 2 respectively with the other end of capacitor C 4 and power supply be connected; The pin one of controlled constant-current source U2 is connected with the pin P03_PWM2 of CPU, the pin 5 of controlled constant-current source U2 is all connected with power supply ground with the pin 6 of controlled constant-current source U2, and the pin 7 of controlled constant-current source U2 is connected with one end and the testing circuit of first control circuit, the 3rd control circuit, sensitization resistance R 6 respectively.
Preferably, described the 3rd control circuit comprises:
Voltage stabilizing didoe D3, resistance R 2, inductance L 3, capacitor C 3, capacitor C 6 and controlled constant-current source U3, controlled constant-current source U3 model is T6322, wherein, one end of resistance R 2 is connected with the negative electrode of pin one 2V_IN, the voltage stabilizing didoe D3 of CPU, one end of capacitor C 3, one end of capacitor C 6, pin 7, first control circuit and the second control circuit of controlled constant-current source U3 respectively, and the other end of resistance R 2 is connected with the pin 8 of controlled constant-current source U3 and the positive pole of the 3rd road secondary light source respectively; The anode of voltage stabilizing didoe D3 is connected with the pin 4 of the pin 3 of controlled constant-current source U3, controlled constant-current source U3 and one end of inductance L 3 respectively; The other end of inductance L 3 is connected with the negative pole of the 3rd road secondary light source; The other end of capacitor C 3 respectively with the other end of capacitor C 6 and power supply be connected; The pin one of controlled constant-current source U3 is connected with the pin P04_PWM3 of CPU, the pin 5 of controlled constant-current source U3 is all connected with power supply ground with the pin 6 of controlled constant-current source U3, and the pin 7 of controlled constant-current source U3 is connected with one end, first control circuit, second control circuit and the testing circuit of sensitization resistance R 6 respectively.
Preferably, described testing circuit comprises:
Transistor Q1, resistance R 4, resistance R 5, wherein, described transistor Q1 model is 9014, one end of resistance R 4 is connected with one end, first control circuit, second control circuit and the 3rd control circuit of sensitization resistance R 6 respectively, and the other end of resistance R 4 is connected with the pin CDS_CHECK of CPU and the collector electrode of transistor Q1 respectively; One end of resistance R 5 is connected with the other end of sensitization resistance R 6 and the base stage of transistor Q1 respectively, the other end of resistance R 5 respectively with the emitter of transistor Q1 and power supply be connected.
Preferably, the resistance of described resistance R 3 is 0.1 Ω, and the value of described inductance L 1 is 33uH, and the value of described capacitor C 1 is 220uF/35V, and the value of described capacitor C 5 is 0.22uF.
Preferably, the resistance of described resistance R 1 is 0.1 Ω, and the value of described inductance L 2 is 33uH, and the value of described capacitor C 2 is 220uF/35V, and the value of described capacitor C 4 is 0.22uF.
Preferably, the resistance of described resistance R 2 is 0.1 Ω, and the value of described inductance L 3 is 33uH, and the value of described capacitor C 3 is 220uF/35V, and the value of described capacitor C 6 is 0.22uF.
Preferably, the resistance of described resistance R 4 is 10K Ω, and the resistance of described resistance R 5 is 1.2K Ω.
The control circuit of watch-dog night illumination of the present utility model, detect the power of extraneous light by testing circuit, a little less than light time, switch on power to open floor light instrument by control circuit, make imaging clearly in the time of the low light level, in the time that light is strong, by control circuit powered-down to close floor light instrument, imaging in the time of high light is not whitened, reach the best visual effect.
Brief description of the drawings
Fig. 1 represents the control circuit structure chart of a kind of watch-dog night illumination that the utility model embodiment provides.
Fig. 2 represents the circuit structure diagram of the CPU that the utility model embodiment provides.
Fig. 3 represents the control circuit figure of a kind of watch-dog night illumination that the utility model embodiment provides.
Embodiment
In order to make the purpose of this utility model, technical scheme and advantage clearer, below in conjunction with drawings and Examples, the utility model is further elaborated.Should be appreciated that specific embodiment described herein is only in order to explain the utility model, and be not used in restriction the utility model.
The utility model provides a kind of control circuit of watch-dog night illumination, sees Fig. 1:
Described control circuit comprises: for sending the governor circuit of pwm control signal, for controlling the first control circuit of the first controlled constant current source switch, for controlling the second control circuit of the second controlled constant current source switch, for controlling the 3rd control circuit of the 3rd controlled constant current source switch, and for detection of the testing circuit of extraneous light intensity; Described first control circuit, second control circuit, the 3rd control circuit and testing circuit are connected with governor circuit respectively.
Wherein, described governor circuit comprises:
CPU, model is STC12C5A60S2, Fig. 2 shows the circuit structure diagram of the CPU that the present embodiment provides, wherein, the pin one 2V_IN of described CPU is connected with first control circuit, second control circuit and the 3rd control circuit respectively, and the pin PO4_PWM3 of described CPU is connected with the 3rd control circuit, and the pin PO3_PWM2 of described CPU is connected with second control circuit, the pin PO2_PWM1 of described CPU is connected with first control circuit, and the pin CDS_CHECK of described CPU is connected with described testing circuit.
Fig. 3 shows the control circuit figure of a kind of watch-dog night illumination that the present embodiment provides, and wherein, described first control circuit comprises:
Voltage stabilizing didoe D1, resistance R 3, inductance L 1, capacitor C 1, capacitor C 5 and controlled constant-current source U1, controlled constant-current source U1 model is T6322, wherein, one end of resistance R 3 is connected with the negative electrode of pin one 2V_IN, the voltage stabilizing didoe D1 of CPU, the pin 7 of controlled constant-current source U1, one end of capacitor C 1, one end, second control circuit and the 3rd control circuit of capacitor C 5 respectively, and the other end of resistance R 3 is connected with the pin 8 of controlled constant-current source U1 and the positive pole of the 2nd road secondary light source respectively; The anode of voltage stabilizing didoe D1 is connected with the pin 4 of the pin 3 of controlled constant-current source U1, controlled constant-current source U1 and one end of inductance L 1 respectively; The other end of inductance L 1 is connected with the negative pole of the 2nd road secondary light source; The other end of capacitor C 1 respectively with the other end of capacitor C 5 and power supply be connected; ; The pin one of controlled constant-current source U1 is connected with the pin P02_PWM1 of CPU, the pin 5 of controlled constant-current source U1 is all connected with power supply ground with the pin 6 of controlled constant-current source U1, the pin 7 of controlled constant-current source U1 is connected with one end and the testing circuit of the pin one 2V_IN of CPU, second control circuit, the 3rd control circuit, sensitization resistance R 6 respectively, and the pin 8 of controlled constant-current source U1 is connected with the positive pole of the 2nd road secondary light source.
In the utility model embodiment, the resistance of described resistance R 3 is 0.1 Ω, and the value of described inductance L 1 is 33uH, and the value of described capacitor C 1 is 220uF/35V, and the value of described capacitor C 5 is 0.22uF.
Wherein, described second control circuit comprises:
Voltage stabilizing didoe D2, resistance R 1, inductance L 2, capacitor C 2, capacitor C 4 and controlled constant-current source U2, controlled constant-current source U2 model is T6322, wherein, one end of resistance R 1 is connected with the negative electrode of pin one 2V_IN, the voltage stabilizing didoe D2 of CPU, the pin 7 of controlled constant-current source U2, one end of capacitor C 2, one end, first control circuit and the 3rd control circuit of capacitor C 4 respectively, and the other end of resistance R 1 is connected with the pin 8 anodal and controlled constant-current source U2 of the 1st road secondary light source respectively; The anode of voltage stabilizing didoe D2 is connected with the pin 4 of the pin 3 of controlled constant-current source U2, controlled constant-current source U2 and one end of inductance L 2 respectively; The other end of inductance L 2 is connected with the negative pole of the 1st road secondary light source; The other end of capacitor C 2 respectively with the other end of capacitor C 4 and power supply be connected; The pin one of controlled constant-current source U2 is connected with the pin P03_PWM2 of CPU, the pin 5 of controlled constant-current source U2 is all connected with power supply ground with the pin 6 of controlled constant-current source U2, and the pin 7 of controlled constant-current source U2 is connected with one end and the testing circuit of first control circuit, the 3rd control circuit, sensitization resistance R 6 respectively.
In the utility model embodiment, the resistance of described resistance R 1 is 0.1 Ω, and the value of described inductance L 2 is 33uH, and the value of described capacitor C 2 is 220uF/35V, and the value of described capacitor C 4 is 0.22uF.
Wherein, described the 3rd control circuit comprises:
Voltage stabilizing didoe D3, resistance R 2, inductance L 3, capacitor C 3, capacitor C 6 and controlled constant-current source U3, controlled constant-current source U3 model is T6322, wherein, one end of resistance R 2 is connected with the negative electrode of pin one 2V_IN, the voltage stabilizing didoe D3 of CPU, one end of capacitor C 3, one end of capacitor C 6, pin 7, first control circuit and the second control circuit of controlled constant-current source U3 respectively, and the other end of resistance R 2 is connected with the pin 8 of controlled constant-current source U3 and the positive pole of the 3rd road secondary light source respectively; The anode of voltage stabilizing didoe D3 is connected with the pin 4 of the pin 3 of controlled constant-current source U3, controlled constant-current source U3 and one end of inductance L 3 respectively; The other end of inductance L 3 is connected with the negative pole of the 3rd road secondary light source; The other end of capacitor C 3 respectively with the other end of capacitor C 6 and power supply be connected; The pin one of controlled constant-current source U3 is connected with the pin P04_PWM3 of CPU, the pin 5 of controlled constant-current source U3 is all connected with power supply ground with the pin 6 of controlled constant-current source U3, and the pin 7 of controlled constant-current source U3 is connected with one end, first control circuit, second control circuit and the testing circuit of sensitization resistance R 6 respectively.
In the utility model embodiment, the resistance of described resistance R 2 is 0.1 Ω, and the value of described inductance L 3 is 33uH, and the value of described capacitor C 3 is 220uF/35V, and the value of described capacitor C 6 is 0.22uF.
Wherein, described testing circuit comprises:
Transistor Q1, resistance R 4, resistance R 5, wherein, described transistor Q1 model is 9014, one end of resistance R 4 is connected with one end, first control circuit, second control circuit and the 3rd control circuit of sensitization resistance R 6 respectively, and the other end of resistance R 4 is connected with the pin CDS_CHECK of CPU and the collector electrode of transistor Q1 respectively; One end of resistance R 5 is connected with the other end of sensitization resistance R 6 and the base stage of transistor Q1 respectively, the other end of resistance R 5 respectively with the emitter of transistor Q1 and power supply be connected.
In the utility model embodiment, the resistance of described resistance R 4 is 10K Ω, and the resistance of described resistance R 5 is 1.2K Ω.Wherein, R4 is the current-limiting resistance of emitter follower, and R5 is clamp resistance, is used for the conducting of clamper triode.
In the utility model embodiment, 1-3 road the 3rd road secondary light source is matrix form 42u electroluminescent lamp.
P02_PWM1, P03_PWM2, P04_PWM3 are the pwm control signals of master cpu, and T6322 is the controlled constant-current source of 1A, and resistance R 5 is used for coordinating outside sensitization resistance, regulate R5 change system to open the light intensity that servicing lighting needs.Testing circuit detects the resistance of sensitization resistance R 6, return to CPU by CDC_CHECK signal, it is darker that system determines extraneous light by detection CDC_CHECK, need to open servicing lighting, P02_PWM1, P03_PWM2, P04_PWM3 will control controlled constant-current source U1-U3 by 3 groups of adjustable PWM of independent transmitting so.By changing the duty ratio of P02_PWM1, P03_PWM2, P04_PWM3, regulate the supply current switch of floor light, reach the object of the brightness of controlling lighting apparatus.Because the frequency of present 3 tunnel control signals is all the speed of 160K, naked eyes and common picture pick-up device are difficult to discover, so completely enough to common floor light.
When user regulates after the brightness of floor light, memory is set, and system will be remembered the current information such as PWM duty ratio and current location point, in user next time through in herein, system can automatically recall memory value and send to constant-current circuit, reaches the best visual effect.
The control method flow chart of a kind of watch-dog night illumination that the utility model embodiment provides, details are as follows:
In step S1, judge that whether sensitization resistance is lower than preset resistance threshold value, be step S2, otherwise execution step S3;
In step S2, regulate PWM duty ratio and be sent to controllable constant stream source to cut off the electric current of floor light instrument;
In step S3, regulate PWM duty ratio and be sent to controllable constant stream source to connect the electric current of floor light instrument, continue step S4;
In the utility model embodiment, the duty ratio of the PWM that PWM control information refers to, detecting after the resistance of sensitization resistance, return to processor, processor changes the duty ratio of PWM by calculating, and the duty ratio that sends PWM regulates the supply current switch of floor light to power supply, reach the object of the brightness of controlling lighting apparatus.And the frequency that PWM control information sends is all the speed of 160K, and naked eyes and common picture pick-up device are difficult to discover, so completely enough to common floor light.
The controlled constant-current source of power acquisition in this example, and pwm control signal is at least one group, and this example is just used three groups.It is the electric current that processor will 3 groups of adjustable PWM of independent transmitting be controlled controlled constant-current source.Three groups of pwm control signals can be set asynchronous in practical application, three groups of pwm control signal synchronized transmissions in this example.
In step S4, record the light intensity of the floor light instrument of current location information, pwm control signal and user's adjusting;
In step S5, at the camera position of watch-dog during through the position of overwriting, transfer the pwm control signal information to record that should position;
In step S6, in the time that this position corresponding record has the light intensity information of the floor light instrument that user regulates, transfer corresponding light intensity information;
In step S7, according to pwm control signal information and intensity information, control signal is sent to the power supply of floor light instrument, to regulate floor light instrument.
In the utility model embodiment, when user regulates after the brightness of floor light, memory is set, system will be remembered the current information such as PWM duty ratio and current location point, in user next time through in herein, system can automatically recall memory value and send to constant-current circuit, reaches the best visual effect.
In the utility model embodiment, sensitization resistance is installed in watch-dog, sensitization resistance is according to the power of extraneous light, and resistance changes, in this example, it is large that sensitization resistance becomes, be that light dies down, sensitization resistance diminishes, i.e. light grow, according to the difference of sensitization resistance, otherwise also can.In this example, adopt sensitization resistance, also can adopt the components and parts of the extraneous light power of other energy perception.
In the time detecting ambient light line strength and be better than default light threshold value, think that light intensity is stronger, processor sends PWM(Pulse Width Modulation, pulse width modulation) control signal is to power supply, cuts off the supply current of floor light instrument, in the time detecting ambient light line strength lower than default light threshold value, a little less than thinking that light intensity, processor sends pwm control signal to power supply, connects the supply current of floor light instrument, makes floor light tool work light filling.
Meanwhile, the intensity of the floor light instrument that writing task personnel regulate, the positional information of pwm control signal and current imaging, to directly call next time.
The control circuit of watch-dog night illumination of the present utility model, detect the power of extraneous light by testing circuit, a little less than light time, switch on power to open floor light instrument by control circuit, make imaging clearly in the time of the low light level, in the time that light is strong, by control circuit powered-down to close floor light instrument, imaging in the time of high light is not whitened, reach the best visual effect.
The above is only preferred implementation of the present utility model; it should be pointed out that for those skilled in the art, do not departing under the prerequisite of the utility model principle; can also make some improvements and modifications, these improvements and modifications also should be considered as protection range of the present utility model.
Claims (10)
1. a control circuit for watch-dog night illumination, is characterized in that, comprising:
For sending the governor circuit of pwm control signal, for controlling the first control circuit of the first controlled constant current source switch, for controlling the second control circuit of the second controlled constant current source switch, for controlling the 3rd control circuit of the 3rd controlled constant current source switch, and for detection of the testing circuit of extraneous light intensity; Described first control circuit, second control circuit, the 3rd control circuit and testing circuit are connected with governor circuit respectively.
2. control circuit as claimed in claim 1, is characterized in that, described governor circuit comprises:
CPU, model is STC12C5A60S2, wherein, the pin one 2V_IN of described CPU is connected with first control circuit, second control circuit and the 3rd control circuit respectively, the pin PO4_PWM3 of described CPU is connected with the 3rd control circuit, the pin PO3_PWM2 of described CPU is connected with second control circuit, and the pin PO2_PWM1 of described CPU is connected with first control circuit, and the pin CDS_CHECK of described CPU is connected with described testing circuit.
3. control circuit as claimed in claim 1, is characterized in that, described first control circuit comprises:
Voltage stabilizing didoe D1, resistance R 3, inductance L 1, capacitor C 1, capacitor C 5 and controlled constant-current source U1, controlled constant-current source U1 model is T6322, wherein, one end of resistance R 3 is connected with the negative electrode of pin one 2V_IN, the voltage stabilizing didoe D1 of CPU, the pin 7 of controlled constant-current source U1, one end of capacitor C 1, one end, second control circuit and the 3rd control circuit of capacitor C 5 respectively, and the other end of resistance R 3 is connected with the pin 8 of controlled constant-current source U1 and the positive pole of the 2nd road secondary light source respectively; The anode of voltage stabilizing didoe D1 is connected with the pin 4 of the pin 3 of controlled constant-current source U1, controlled constant-current source U1 and one end of inductance L 1 respectively; The other end of inductance L 1 is connected with the negative pole of the 2nd road secondary light source; The other end of capacitor C 1 respectively with the other end of capacitor C 5 and power supply be connected; The pin one of controlled constant-current source U1 is connected with the pin P02_PWM1 of CPU, the pin 5 of controlled constant-current source U1 is all connected with power supply ground with the pin 6 of controlled constant-current source U1, the pin 7 of controlled constant-current source U1 is connected with one end and the testing circuit of the pin one 2V_IN of CPU, second control circuit, the 3rd control circuit, sensitization resistance R 6 respectively, and the pin 8 of controlled constant-current source U1 is connected with the positive pole of the 2nd road secondary light source.
4. control circuit as claimed in claim 1, is characterized in that, described second control circuit comprises:
Voltage stabilizing didoe D2, resistance R 1, inductance L 2, capacitor C 2, capacitor C 4 and controlled constant-current source U2, controlled constant-current source U2 model is T6322, wherein, one end of resistance R 1 is connected with the negative electrode of pin one 2V_IN, the voltage stabilizing didoe D2 of CPU, the pin 7 of controlled constant-current source U2, one end of capacitor C 2, one end, first control circuit and the 3rd control circuit of capacitor C 4 respectively, and the other end of resistance R 1 is connected with the pin 8 anodal and controlled constant-current source U2 of the 1st road secondary light source respectively; The anode of voltage stabilizing didoe D2 is connected with the pin 4 of the pin 3 of controlled constant-current source U2, controlled constant-current source U2 and one end of inductance L 2 respectively; The other end of inductance L 2 is connected with the negative pole of the 1st road secondary light source; The other end of capacitor C 2 respectively with the other end of capacitor C 4 and power supply be connected; The pin one of controlled constant-current source U2 is connected with the pin P03_PWM2 of CPU, the pin 5 of controlled constant-current source U2 is all connected with power supply ground with the pin 6 of controlled constant-current source U2, and the pin 7 of controlled constant-current source U2 is connected with one end and the testing circuit of first control circuit, the 3rd control circuit, sensitization resistance R 6 respectively.
5. control circuit as claimed in claim 1, is characterized in that, described the 3rd control circuit comprises:
Voltage stabilizing didoe D3, resistance R 2, inductance L 3, capacitor C 3, capacitor C 6 and controlled constant-current source U3, controlled constant-current source U3 model is T6322, wherein, one end of resistance R 2 is connected with the negative electrode of pin one 2V_IN, the voltage stabilizing didoe D3 of CPU, one end of capacitor C 3, one end of capacitor C 6, pin 7, first control circuit and the second control circuit of controlled constant-current source U3 respectively, and the other end of resistance R 2 is connected with the pin 8 of controlled constant-current source U3 and the positive pole of the 3rd road secondary light source respectively; The anode of voltage stabilizing didoe D3 is connected with the pin 4 of the pin 3 of controlled constant-current source U3, controlled constant-current source U3 and one end of inductance L 3 respectively; The other end of inductance L 3 is connected with the negative pole of the 3rd road secondary light source; The other end of capacitor C 3 respectively with the other end of capacitor C 6 and power supply be connected; The pin one of controlled constant-current source U3 is connected with the pin P04_PWM3 of CPU, the pin 5 of controlled constant-current source U3 is all connected with power supply ground with the pin 6 of controlled constant-current source U3, and the pin 7 of controlled constant-current source U3 is connected with one end, first control circuit, second control circuit and the testing circuit of sensitization resistance R 6 respectively.
6. control circuit as claimed in claim 1, is characterized in that, described testing circuit comprises:
Transistor Q1, resistance R 4, resistance R 5, wherein, described transistor Q1 model is 9014, one end of resistance R 4 is connected with one end, first control circuit, second control circuit and the 3rd control circuit of sensitization resistance R 6 respectively, and the other end of resistance R 4 is connected with the pin CDS_CHECK of CPU and the collector electrode of transistor Q1 respectively; One end of resistance R 5 is connected with the other end of sensitization resistance R 6 and the base stage of transistor Q1 respectively, the other end of resistance R 5 respectively with the emitter of transistor Q1 and power supply be connected.
7. control circuit as claimed in claim 3, is characterized in that, the resistance of described resistance R 3 is 0.1 Ω, and the value of described inductance L 1 is 33uH, and the value of described capacitor C 1 is 220uF/35V, and the value of described capacitor C 5 is 0.22uF.
8. control circuit as claimed in claim 4, is characterized in that, the resistance of described resistance R 1 is 0.1 Ω, and the value of described inductance L 2 is 33uH, and the value of described capacitor C 2 is 220uF/35V, and the value of described capacitor C 4 is 0.22uF.
9. control circuit as claimed in claim 5, is characterized in that, the resistance of described resistance R 2 is 0.1 Ω, and the value of described inductance L 3 is 33uH, and the value of described capacitor C 3 is 220uF/35V, and the value of described capacitor C 6 is 0.22uF.
10. control circuit as claimed in claim 6, is characterized in that, the resistance of described resistance R 4 is 10K Ω, and the resistance of described resistance R 5 is 1.2K Ω.
Priority Applications (1)
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| CN201320893361.4U CN203761639U (en) | 2013-12-31 | 2013-12-31 | Control circuit of night lighting for monitoring equipment |
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| CN201320893361.4U CN203761639U (en) | 2013-12-31 | 2013-12-31 | Control circuit of night lighting for monitoring equipment |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105430815A (en) * | 2014-09-10 | 2016-03-23 | 河南平原光电有限公司 | Graduation brightness adjusting system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105430815A (en) * | 2014-09-10 | 2016-03-23 | 河南平原光电有限公司 | Graduation brightness adjusting system |
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Effective date of registration: 20170123 Address after: Shenzhen City, Bantian Guangdong province 518000 in science and Technology Park in B3-204 Po Po Patentee after: Shenzhen Yi Jia Electronics Co., Ltd. Xiangyu Address before: 710082 Shaanxi province Xi''an Beilin District No. 127 West Hospital No. 1 building 4 unit 201 Patentee before: Wang Yong |
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