CN204887201U

CN204887201U - Simulation camera

Info

Publication number: CN204887201U
Application number: CN201520706279.5U
Authority: CN
Inventors: 谢文成; 徐龙忠; 胡伟忠; 李云星; 张惠栋
Original assignee: Hangzhou Lide Communication Co Ltd
Current assignee: Hangzhou Lide Communication Co Ltd
Priority date: 2015-09-12
Filing date: 2015-09-12
Publication date: 2015-12-16
Anticipated expiration: 2025-09-12

Abstract

The utility model discloses a simulation camera, including casing, camera and host system, still including scintillation warning module, the scintillation reminds the module to include: the LED banks distributes around the camera, smog detecting element for detect the smog content around the camera, and export corresponding smog detected signal, LED the control unit, in response to smog detects the signal control LED banks and stops or beginning the scintillation. The utility model discloses can when the conflagration takes place, through the scintillation of control LED banks to play suggestion rescue personnel's effect.

Description

A kind of analog video camera

Technical field

The utility model relates to a kind of analog video camera.

Background technology

At present, analog video camera is generally as a kind of watch-dog, is installed on some public arenas such as such as traffic surveillance and control system, floor, parking lot, to realize the real-time monitoring to scene.In order to analog video camera being allowed to see more clearly at night; usual meeting is supporting on analog video camera is provided with LED light supplement lamp and corresponding photo-sensitive cell; to detect light intensity around by photo-sensitive cell, thus automatically open LED light supplement lamp and carry out light compensation.Therefore, this type of video camera, also can be used as lighting apparatus and uses, so that when the light fixture in floor breaks down, and temporary replacement light fixture.

Now, fire happens occasionally, and when fire occurs, part stays in the people of high-storey, cannot evacuate in time, can only wait for rescue.After fire generation, on-the-spot in utter disorder, a lot of trapped personnel is found all separately and is hidden a little, can not concentrate; When rescue worker comes, can not be found them fast, delay rescue attempt, cause a part of trapped personnel not succoured timely and dead.Therefore, how to utilize the facility in floor, guide rescue worker to find this problem of trapped personnel fast, urgently to be resolved hurrily.

Utility model content

For the deficiency that prior art exists, the purpose of this utility model is to provide a kind of analog video camera, when breaking out of fire, by controlling the flicker of LED group, thus can play the effect of prompting rescue worker.

For achieving the above object, the utility model provides following technical scheme:

A kind of analog video camera, comprise casing, camera and main control module, also comprise flicker prompting module, described flicker prompting module comprises: LED group, is distributed in around described camera; Smoke Detection unit, for detecting the smog content around video camera, and exports corresponding Smoke Detection signal; LED control unit, stops in response to described Smoke Detection signal controlling LED group or starts flicker.

Further, described Smoke Detection unit comprises: Smoke Sensor, for detecting the smog content around video camera; Differential amplifier, is coupled to described Smoke Sensor, for the change in resistance of described Smoke Sensor internal resistance is converted to Smoke Detection signal.

Further, described LED control unit comprises: pwm signal generative circuit, in response to described Smoke Detection signal to export corresponding pwm signal; Switching circuit, controls LED group in response to described pwm signal and stops or starting flicker.

Further, described pwm signal generative circuit comprises single-chip microcomputer, and an input pin of described single-chip microcomputer receives described Smoke Detection signal, and an output pin of described single-chip microcomputer exports described pwm signal.

Further, described switching circuit comprises: one first resistance, and its one end is coupled to the output pin of described single-chip microcomputer, to receive described pwm signal; One NPN triode, its base stage is coupled to the other end of described first resistance, grounded emitter; One second resistance, its one end is coupled to the collector electrode of NPN triode, another termination VCC voltage; One the 3rd resistance, its one end is coupled to the collector electrode of NPN triode; One PMOS switch pipe, its grid is coupled to the other end of described 3rd resistance, and source electrode connects VCC voltage, and drain electrode is connected with LED group.

Further, described video camera also comprises stand-by power supply and power control module, and described power supply control power supply is connected with stand-by power supply and external power source, to control to dock between stand-by power supply and external power source.

Further, the rear end of described casing is also provided with the LED group being controlled by LED control unit.

Compared with prior art, the utility model has the advantages that: by above scheme, when Smoke Detection unit inspection is to smog too high levels in air, LED control unit controls LED group with certain frequency scintillation, thus plays the effect of prompting.Now, trapped personnel can be transferred near the LED of flicker according to actual conditions, and rescue worker can find trapped personnel by the LED group of flicker fast, ensures rescue success rate.

Accompanying drawing explanation

Fig. 1 is the schematic diagram of video camera in the utility model;

Fig. 2 is another angle schematic diagram of video camera in the utility model;

Fig. 3 is the circuit diagram of Smoke Detection circuit in the utility model;

Fig. 4 is the circuit diagram of LED control circuit in the utility model.

Reference numeral: 1, casing, 2, camera, 3, LED group, 400, Smoke Detection unit, 410, Smoke Sensor, 420, differential amplifier, 500, LED control unit, 510, pwm signal generative circuit, 520, switching circuit.

Embodiment

Referring to figs. 1 through Fig. 4, embodiment of the present utility model is described further.

With reference to Fig. 1, a kind of analog video camera, comprises casing 1, camera 2 and main control module, also comprises flicker prompting module, and flicker prompting module comprises: LEDLED lamp group 3, is distributed in camera 2 around; Smoke Detection unit 400, for detecting the smog content around video camera, and exports corresponding Smoke Detection signal; LEDLED control unit 500, stops in response to Smoke Detection signal controlling LEDLED lamp group 3 or starts flicker.

In one embodiment, with reference to Fig. 3, Smoke Detection unit 400 comprises Smoke Sensor 410 and differential amplifier 420.Wherein, Smoke Sensor 410 is for detecting the smog content around video camera, and its model is MQ2A, and described Smoke Sensor 410 has two inputs and two outputs, and wherein, two inputs connect VCC voltage and ground connection respectively, differential amplifier 420 comprises resistance R1 ~ R6, comparator A1, wherein, one end of resistance R1 is coupled to an output of Smoke Sensor 410, other end ground connection, one end of resistance R2 is coupled to another output of Smoke Sensor 410, the other end connect with resistance R3 after ground connection, the in-phase end of comparator A1 is coupled between resistance R1 and Smoke Sensor 410, end of oppisite phase is coupled to after connecting with resistance R4 between resistance R2 and resistance R3, one end of resistance R5 is coupled to VCC voltage, the other end is coupled to the output of comparator, one end of resistance R6 is coupled to the output of comparator, another termination LEDLED control unit 500.Therefore, the principle of Smoke Detection circuit is, when smog not detected, the input voltage of the end of oppisite phase of comparator is greater than in-phase end, comparator output low level; When smog being detected, the in-phase end voltage of comparator is greater than end of oppisite phase, and comparator exports the Smoke Detection signal of high level.

In one embodiment, comprise PWMPWM signal generating circuit 510 and switching circuit 520 with reference to Fig. 4, LEDLED control unit 500, wherein, PWMPWM signal generating circuit 510 in response to Smoke Detection signal to export corresponding pwm signal; Switching circuit 520, stops in response to pwm signal control LEDLED lamp group 3 or starts flicker.In this embodiment, described PWMPWM signal generating circuit 510 comprises single-chip microcomputer, and its model can be AT89C51, and an input pin of single-chip microcomputer receives Smoke Detection signal, and from an one output pin output pwm signal.Owing to utilizing single-chip microcomputer output pwm signal to be known technological means, therefore, the present embodiment repeats no more its concrete principle.

In one embodiment, with reference to Fig. 4, switching circuit 520 comprises NPN triode Q1, resistance R7 ~ R9 and PMOS switch pipe Q2.Wherein, one end of resistance R9 is coupled to the output pin of described single-chip microcomputer, to receive described pwm signal; The base stage of NPN triode Q1 is coupled to the other end of resistance R9, grounded emitter; One end of resistance R7 is coupled to the collector electrode of NPN triode Q1, another termination VCC voltage; One end of resistance R8 is coupled to the collector electrode of NPN triode Q1; The grid of PMOS switch pipe Q2 is coupled to the other end of described resistance R8, and source electrode connects VCC voltage, and drain electrode is connected with LEDLED lamp group 3.Therefore, the operation principle of switching circuit 520 is, NPN triode Q1, in response to the intermittent break-make of pwm signal, makes PMOS switch pipe Q2 followed by intermittent break-make, thus can make LEDLED lamp group 3 intermittent electric and dead electricity, realize flicker effect.

In addition, video camera also comprises stand-by power supply and power control module (not shown), and wherein, power supply control power supply is connected with stand-by power supply and external power source, to control to dock between stand-by power supply and external power source.So, even the electricity went off, video camera still can normally work, and ensures the guiding function of flicker prompting module.

In addition, with reference to Fig. 2, the rear end of casing 1 is also provided with the LEDLED lamp group 3 being controlled by LEDLED control unit 500, also arranges LEDLED lamp group 3 by the rear end at casing 1, and make flicker scope larger, observability is higher.

The above is only preferred implementation of the present utility model, protection range of the present utility model be not only confined to above-described embodiment, and all technical schemes belonged under the utility model thinking all belong to protection range of the present utility model.It should be pointed out that for those skilled in the art, do not departing from the some improvements and modifications under the utility model principle prerequisite, these improvements and modifications also should be considered as protection range of the present utility model.

Claims

1. an analog video camera, comprises casing, camera and main control module, it is characterized in that, also comprises flicker prompting module, and described flicker prompting module comprises:

LED group, is distributed in around described camera;

Smoke Detection unit, for detecting the smog content around video camera, and exports corresponding Smoke Detection signal;

LED control unit, stops in response to described Smoke Detection signal controlling LED group or starts flicker.

2. analog video camera according to claim 1, is characterized in that, described Smoke Detection unit comprises:

Smoke Sensor, for detecting the smog content around video camera;

Differential amplifier, is coupled to described Smoke Sensor, for the change in resistance of described Smoke Sensor internal resistance is converted to Smoke Detection signal.

3. analog video camera according to claim 2, is characterized in that, described LED control unit comprises:

Pwm signal generative circuit, in response to described Smoke Detection signal to export corresponding pwm signal;

Switching circuit, controls LED group in response to described pwm signal and stops or starting flicker.

4. analog video camera according to claim 3, is characterized in that, described pwm signal generative circuit comprises single-chip microcomputer, and an input pin of described single-chip microcomputer receives described Smoke Detection signal, and an output pin of described single-chip microcomputer exports described pwm signal.

5. analog video camera according to claim 4, is characterized in that, described switching circuit comprises:

One first resistance, its one end is coupled to the output pin of described single-chip microcomputer, to receive described pwm signal;

One NPN triode, its base stage is coupled to the other end of described first resistance, grounded emitter;

One second resistance, its one end is coupled to the collector electrode of NPN triode, another termination VCC voltage;

One the 3rd resistance, its one end is coupled to the collector electrode of NPN triode;

One PMOS switch pipe, its grid is coupled to the other end of described 3rd resistance, and source electrode connects VCC voltage, and drain electrode is connected with LED group.

6. analog video camera according to claim 1, is characterized in that, described video camera also comprises stand-by power supply and power control module, and described power supply control power supply is connected with stand-by power supply and external power source, to control to dock between stand-by power supply and external power source.

7. analog video camera according to claim 1, is characterized in that, the rear end of described casing is also provided with the LED group being controlled by LED control unit.