CN212727501U

CN212727501U - Light supplementing device applied to monitoring camera

Info

Publication number: CN212727501U
Application number: CN202021642277.1U
Authority: CN
Inventors: 曾振武; 白瑜宁; 冯浩哲
Original assignee: Sanming University
Current assignee: Sanming University
Priority date: 2020-08-10
Filing date: 2020-08-10
Publication date: 2021-03-16
Anticipated expiration: 2030-08-10

Abstract

The utility model provides an apply to first light filling device of surveillance camera, including USB interface, the module of stepping up, drive module and the light source that is used for providing power input, wherein, the input of USB interface is used for being connected to the power, and the output is connected the input of the module of stepping up, the output of the module of stepping up is connected to through drive module the input of light source, the light source is used for the first light filling of surveillance camera. The utility model discloses use external infrared light filling device, not receive the volume, the consumption restriction provides effective light intensity for the surveillance camera head at any time and supplyes, makes the camera also can present clear picture when light is not good.

Description

Light supplementing device applied to monitoring camera

Technical Field

The utility model relates to a light filling field particularly, relates to an apply to light filling device of surveillance camera head.

Background

An optical imaging sensor of a general monitoring camera mainly achieves the purpose of imaging by sensing external light and converting the external light into an electric signal. The camera of watch-dog is when light illumination intensity is better, and the picture that appears is clear, and is bright-colored, but under the light condition that does not have even in light is darker, the picture quality of image can descend, and when the camera can not all catch light this moment, very big "snowflake screen" of noise point will appear in the image of control. Therefore, light supplement for the camera of the monitor becomes an indispensable step.

Along with the requirements of modern technical development and family safety protection, the household monitor has been widely applied to thousands of households, but at present, the cameras of most household monitors are influenced by energy consumption and volume, and the power of the built-in night infrared light supplementing device is small, so that effective light intensity can not be provided for the monitoring camera at night.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing an apply to the light filling device of surveillance camera head and be used for solving the problem that the aforesaid exists.

In order to achieve the above object, the utility model adopts the following technical scheme: the utility model provides an apply to first light filling device of surveillance camera, is including the USB interface, the module that steps up, drive module and the light source that are used for providing power input, wherein, the input of USB interface is used for being connected to the power, and the output is connected the input of the module that steps up, the output of the module that steps up is connected to through drive module the input of light source, the light source is used for the first light filling of surveillance camera.

Further, the power supply is a 5V constant current power supply.

Further, the boosting module is of a model number TPS 55340.

Further, the light source is a high-power light source, and the high-power light source is an infrared LED lamp with the wavelength of 850nm and the power of 10W.

Furthermore, the infrared LED lamp adopts a dot matrix design of series connection and parallel connection, and the dot matrix design is rectangular arrangement.

Furthermore, the type of the driving module is DD311 with voltage reduction and constant current.

Furthermore, the pin 1 of the driving module is connected with an external resistor, and the external resistor value ranges from 5V to 36V.

Further, the light source is a low-power light source which is a 0.1W infrared LED lamp with the wavelength of 850 nm.

Furthermore, the infrared LED lamps adopt a series-connection and parallel-connection dot matrix design, and the dot matrix design is annularly arranged.

Furthermore, the model of the driving module is HV9910 with voltage reduction and constant current.

The utility model has the advantages of:

the utility model provides an apply to first light filling device of surveillance camera, including USB interface, the module of stepping up, drive module and the light source that is used for providing power input, wherein, the input of USB interface is used for being connected to the power, and the output is connected the input of the module of stepping up, the output of the module of stepping up is connected to through drive module the input of light source, the light source is used for the first light filling of surveillance camera. The utility model discloses an use external infrared light filling device, make the surveillance camera head not receive the volume, the consumption restriction selects different powers as required, and the dot matrix of different modes of arranging provides effective light intensity replenishment for the surveillance camera head at any time, makes the camera also can present the clear picture when light is not good.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention, and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.

Fig. 1 is a schematic connection diagram of a light supplement device according to an embodiment of the present invention.

Fig. 2 is a schematic diagram illustrating a principle of a boosting module according to an embodiment of the present invention.

Fig. 3 is a schematic circuit diagram of a high-power light source according to an embodiment of the present invention.

Fig. 4 is a schematic circuit diagram of a low-power light source according to an embodiment of the present invention.

Fig. 5 is a schematic diagram of arrangement of low-power light sources according to an embodiment of the present invention.

Fig. 6 is a schematic pin diagram of a DD311 according to an embodiment of the present invention.

Fig. 7 is a schematic diagram of a DD311 according to an embodiment of the present invention.

Fig. 8 is a pin diagram of the HV9910 according to the embodiment of the present invention.

Fig. 9 is a schematic diagram of HV9910 according to an embodiment of the present invention.

Detailed Description

To make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the drawings of the embodiments of the present invention are combined to clearly and completely describe the technical solutions of the embodiments of the present invention, and obviously, the described embodiments are some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work all belong to the protection scope of the present invention. Thus, the following detailed description of the embodiments of the present invention, presented in the accompanying drawings, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and to simplify the description, but do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the present invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically limited otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

In the present disclosure, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact between the first and second features, or may comprise contact between the first and second features not directly. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

As shown in fig. 1, the present embodiment provides a light supplement device for a surveillance camera, including a USB interface 10 for providing a power input, a voltage boosting module 20, a driving module 30, and a light source 40, where an input end of the USB interface 10 is used for connecting to a power supply, an output end of the USB interface is connected to an input end of the voltage boosting module 20, an output end of the voltage boosting module 20 is connected to an input end of the light source 40 through the driving module 30, and the light source 40 is used for supplementing light to the surveillance camera.

In this embodiment, the 5V constant current power supply can be selected for the USB interface 10 providing the power input, and is used for supplying power to the whole device, it should be noted that the USB interface 10 providing the power input can also select power supplies with other voltages according to actual needs, and these schemes are all within the protection scope of the present invention.

In the embodiment, as shown in fig. 2, the boost module 20 may select the TPS55340, and the TPS55340 adjusts the output modulation control by means of the current pulse width. The PWM control circuit turns on the switching period when each oscillation clock starts. Initially, the input voltage passes through an inductor and stores energy as the inductor current increases, with the current through the load being supplied by an output capacitor. When the current of the inductor gradually increases and reaches the output of the error amplifier, the power switch is turned off and the Schottky diode is forward biased at an externally set threshold level, the current of the inductor flows to the output at the moment, and the inductor supplements the energy stored by the inductor to the output capacitor so as to supply load current. This operation is repeated while also requiring a switching cycle.

The PWM controlled comparator is used to compare the error amplifier output with the current signal, and the duty cycle of the boost converter designed by TPS55340 is determined by the PWM controlled comparator. The frequency of the oscillator may be determined by setting an external resistor or synchronizing an external clock signal. The duty cycle of the fixed owned peak current mode is controlled to be more than 50%, and at this time, certain compensation is needed for the slope, so that second harmonic oscillation is avoided. The slope compensation may be compensated by adding the oscillator's slope signal to the inductor circuit slope, but if the inductance value is too small, the compensation may not be sufficient internally to remain stable. Feedback circuit is controlled by PWM and is adjusted 9 th pin to reference voltage amplifier through Error Amp, and the output of Error Amp is connected to the compensation pin this moment, in order to ensure feedback loop's stable performance and better transient response state, can be with outside RC compensation network connection on compound pin. It should be noted that the boosting module 20 may be of other types, and these solutions are all within the scope of the present invention.

In this embodiment, the light source may be a high-power light source, and the high-power light source may be a 10W infrared LED lamp with a wavelength of 850nm, as shown in fig. 3, at this time, the infrared LED lamp may adopt a lattice design of series connection and parallel connection, and the lattice design may be a rectangular arrangement, so as to utilize the light source 40 with maximum efficiency. Certainly, a low-power light source can be selected according to needs, for example, the low-power light source can select 0.1W infrared LED lamps with a wavelength of 850nm, as shown in fig. 4, at this time, the infrared LED lamps can adopt a series-parallel dot matrix design, and the dot matrix design can select an annular arrangement, as shown in fig. 5, for example, 8, 10, and 12 infrared LED lamps are installed at equal intervals on semicircles (the interval between the semicircles is 2cm) with radii of 6cm, 8cm, and 10cm, respectively, so as to utilize the light source 40 with maximum efficiency. It should be noted that the light source 40 may have other power according to actual needs, and these solutions are all within the protection scope of the present invention.

In this embodiment, if a high-power light source is selected, the driving module 30 can select the DD311 with a step-down constant current, as shown in fig. 6, pin 1 of the driving module 30 is connected to an external resistor, the external resistor has a value ranging from 5V to 36V, and is used as an input terminal of a reference current, pin 2 outputs a voltage ranging from-0.3V to 36V,

pins

3 and 4 are ground terminals, the output current is turned on when the voltage of the enable terminal of pin 5 is greater than 3.3V, and the output current is turned off when the voltage of the enable terminal is 0V. As shown in fig. 7, DD311 is a single-channel output LED constant current driver, the current that can be driven can reach 1A, and the magnitude of the output current can be adjusted at will by adjusting the reference input current, the output current value is about one hundred times of the reference input current, DD311 can bear the output voltage with the highest output current value of about 36V, and can support different connections of multiple LEDs, and the advantage is shown in the high-power LED lamp dot matrix driving power supply, so that the constant current driving power supply designed by DD311 is used to drive a 10W infrared LED dot matrix. It should be understood that when a high-power light source is selected, the driving module 30 may also be selected from other types, and these schemes are all within the protection scope of the present invention

In this embodiment, if a low-power light source is selected, the driving module 30 may select a constant-current step-down HV9910, as shown in fig. 8, the 1 st pin of the HV9910 inputs 18V voltage output by the step-up module 30, the 2 nd pin is a current input terminal of the infrared LED lamp dot matrix, the 3 pins are grounded, the 4 pins control conduction of the external MOS transistor, the 5, 6, and 7 pins may implement linear dimming, and the 8 pins are grounded after being externally connected with a pull-up resistor, so as to control the magnitude of the switching frequency. The HV9910 is internally provided with two voltage comparators, and output signals of the two voltage comparators control the output voltage of the GATE end through the RS so as to meet the requirement of driving an externally connected MOS tube, thereby controlling the output current of the whole circuit. As shown in fig. 9, the HV9910 can work under the drive circuit of step-up, step-down, isolation, non-isolation, etc., and the HV9910 is designed as a step-down type drive power supply because the voltage required by the infrared LED string is lower than the input voltage supplied to the whole circuit. The DC-DC transformer inputs a direct current which is filtered by the C1 to provide an input voltage for the HV 9910. The 4 feet of the HV9910 outputs certain current after the power supply is finished, and the certain current passes through the R1 and the MOS tube, so that the conduction of the MOS tube is controlled. The MOS tube, the inductor L1 and the infrared LED load form a BUCK circuit. The 2-pin HV9910 plays a certain current limiting role for the circuit, and the RCS1 and the RCS2 form a constant current circuit, namely, the constant current is output during the circuit, and the lamps are formed into 5 strings and 6 parallel. The current output by one load is about 20MA, which can be obtained from the formula U/(RCS1+ RCS2), and the current output by 5 series and 6 parallel loads is about 120 MA.

The working principle of the embodiment is detailed as follows:

in this embodiment, firstly, the input end of the USB interface 10 is used for connecting to a power supply, the output end is connected to the input end of the boost module 20, when the high-power light supplementing device is selected, the output end of the boost module 20 is connected to the input end of the high-power light source through the driving module 30-DD311, and the high-power light source is arranged in a rectangular shape to supplement light to the monitoring camera. When the low-power light supplement device is selected, the output end of the boosting module 20 is connected to the input end of a low-power light source through the driving module 30-HV9910, and the low-power light source is arranged in an annular mode to supplement light to the monitoring camera. The utility model discloses use external infrared light filling device, can provide effective light intensity for the surveillance camera head at any time and supply, make the camera not good or do not have when light clear picture also can present completely at light.

While the invention has been particularly shown and described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes in form and detail may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.

Claims

1. The utility model provides an apply to light filling device of surveillance camera head, its characterized in that, is including the USB interface, the module of stepping up, drive module and the light source that are used for providing power input, wherein, the input of USB interface is used for being connected to the power, and the output is connected the input of the module of stepping up, the output of the module of stepping up is connected to through drive module the input of light source, the light source is used for the first light filling of surveillance camera.

2. A light supplementing device for a monitoring camera as claimed in claim 1, wherein the power supply is a 5V constant current power supply.

3. The light supplement device for a monitoring camera as claimed in claim 1, wherein the type of the boost module is TPS 55340.

4. A light supplement device for a monitoring camera as claimed in claim 1, wherein the light source is a high power light source, and the high power light source is a 10W infrared LED lamp with a wavelength of 850 nm.

5. The light supplement device for the monitoring camera as claimed in claim 4, wherein the type of the driving module is DD311 with constant current and voltage reduction.

6. The light supplement device for the monitoring camera as claimed in claim 5, wherein the pin 1 of the driving module is connected to an external resistor, and the external resistor has a value ranging from 5V to 36V.

7. The light supplement device for the monitoring camera as claimed in claim 4, wherein the infrared LED lamps are arranged in a matrix of serial and parallel connection, and the matrix is rectangular.

8. A light supplement device for a monitoring camera as claimed in claim 1, wherein the light source is a low power light source, and the low power light source is a 0.1W infrared LED lamp with a wavelength of 850 nm.

9. A light supplement device for a monitoring camera as claimed in claim 8, wherein the type of the driving module is HV9910 with constant current and voltage reduction.

10. The light supplement device for the monitoring camera as claimed in claim 8, wherein the infrared LED lamps are arranged in a matrix design of serial connection and parallel connection, and the matrix design is arranged in a ring shape.