What is a pan-tilt camera?

Pan-tilt camera is a kind of camera with pan-tilt, which has a device to support the camera to rotate in horizontal and vertical directions. Installing the camera on the tripod head allows the camera to shoot from multiple angles. There are two motors in Yuntai. The horizontal and vertical rotation angles can be adjusted by limit switches. It is divided into indoor Yuntai and outdoor Yuntai.

Yuntai classification

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Pan-tilt is the supporting equipment for installing fixed cameras, which can be divided into fixed and electric pan-tilt.

Indoor Yuntai

Indoor Yuntai has small bearing capacity and no rainproof device.

Outdoor Yuntai

Outdoor Yuntai bears a heavy load and has a rain-proof device. Some high-end outdoor Yuntai have anti-freezing and heating devices in addition to rainproof devices.

Fixed pan-tilt

Fixed pan/tilt is suitable for occasions with small monitoring range. After the camera is installed on the fixed pan/tilt, the horizontal and pitching angles of the camera can be adjusted, and the adjustment mechanism can only be locked after reaching the best working posture.

Electric pan-tilt

The electric pan-tilt is suitable for large-area scanning and monitoring, which can expand the monitoring range of the camera. The high-speed attitude of the electric pan-tilt is realized by two executive motors, which receive the signals from the controller for accurate operation and positioning. Under the action of the control signal, the camera on the tripod head can automatically scan the monitoring area, and can also monitor the objects under the control of the personnel on duty in the monitoring center.

Yuntai camera (6)

According to the rotation characteristics of the tripod head, the tripod head can be divided into a horizontal tripod head that can only rotate left and right and an omnidirectional tripod head that can rotate left and right and up and down.

Generally speaking, the horizontal rotation angle is 0 ~ 350 and the vertical rotation angle is+90. The horizontal rotation speed of constant-speed pan-tilt is generally 3 ~ 10/s and the vertical speed is about 4 /s s. The horizontal rotation speed of variable-speed pan-tilt is generally 0 ~ 32/s and the vertical rotation speed is about 0 ~16/s. In some high-speed camera systems, the horizontal rotation speed of pan-tilt is above 480/s and vertical. ..

Electric Yuntai Electric Yuntai is suitable for large-area scanning and monitoring, which can expand the monitoring range of the camera. The high-speed attitude of the electric pan-tilt is realized by two executive motors, which receive the signals from the controller for accurate operation and positioning. Under the action of the control signal, the camera on the Yuntai can automatically scan the monitoring area, and can also monitor the object under the control of the personnel on duty in the monitoring center. Electric Yuntai Electric Yuntai is suitable for large-area scanning and monitoring, which can expand the monitoring range of the camera. The high-speed attitude of the electric pan-tilt is realized by two executive motors, which receive the signals from the controller for accurate operation and positioning. Under the action of the control signal, the camera on the Yuntai can automatically scan the monitoring area, and can also monitor the object under the control of the personnel on duty in the monitoring center. Electric Yuntai Electric Yuntai is suitable for large-area scanning and monitoring, which can expand the monitoring range of the camera. The high-speed attitude of the electric pan-tilt is realized by two executive motors, which receive the signals from the controller for accurate operation and positioning. Under the action of the control signal, the camera on the Yuntai can automatically scan the monitoring area, and can also monitor the object under the control of the personnel on duty in the monitoring center.

electric motor

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There are two motors in Yuntai. One of these two motors is responsible for horizontal rotation and the other is responsible for vertical rotation. The angle of horizontal rotation is generally 350 degrees. The vertical rotation is 45 degrees, 35 degrees, 75 degrees and so on. The horizontal and vertical rotation angles can be adjusted by limit switches.

Control mode

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Universal pan/tilt is an electric pan/tilt controlled by wires. The control line has five input terminals, one of which is the male terminal of the power supply, and the other four are divided into upper, lower, left and right control terminals. If one end of the power supply is connected to the male terminal and the other end is connected to the "up", the tripod head will drive the camera to rotate upwards, and so on.

There are also control circuits, such as relays built in translation/tilt, which usually has six control inputs. One is the male terminal of the power supply, the other four are the upper, lower, left and right terminals, and one is the automatic rotating terminal. When one end of the power supply is connected to the male terminal and the other end of the power supply is connected to the "automatic" terminal, the tripod head will automatically rotate the camera up, down, left and right at a certain speed.

In terms of power supply voltage, there are two common AC 24V and 220V. Pan-tilt power consumption is generally small and heavy.

There is also a small indoor Yuntai powered by DC 6V, in which batteries can be installed, and it can also be remotely controlled by infrared remote controller. Most ptz still use wired remote control. Yuntai installation position is close to the control center, and the number is small. Generally, the control signal is directly output from the console for control. However, when the mounting position of the pan/tilt is far away from the control center and the number is large, the bus is usually used to transmit the coded control signal, and then the terminal decoder decodes the control signal to control the rotation of the pan/tilt.

Bearing platform

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In order to adapt to the installation of different network cameras and protective covers, the bearing capacity of Yuntai is different. According to the total weight of the selected network camera and protective cover, the appropriate bearing platform should be selected. The bearing capacity of indoor Yuntai is small, and the volume and self-weight of Yuntai are also small. Outdoor Yuntai has a large bearing capacity because it must be equipped with a network camera with a protective cover (often an all-weather protective cover). Its volume and self-weight are also great.

The bearing capacity of Yuntai in the factory room is about 1. 5kg~7kg, outdoor tripod head 7kg~50kg. Some ptz are miniature ptz, such as ptz installed in hemispherical protective cover or all-weather protective cover with camera.

Fault handling

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Yuntai failure may have the following situations.

1. Cannot control Yuntai.

2. Unable to control the decoder

3. Some functions cannot be realized.

4. The signal indicator of the transcoder does not work.

Analysis:

1. The code turn signal does not flash.

Software setting (the light doesn't flash, mainly because the transcoder doesn't work, so solve this problem from the software setting first)

Decoder settings in 1. software (decoder protocol, COM port, baud rate, parity bit, data bit, stop bit)

2. Replace a COM port (check whether the COM port is damaged).

3. After the above settings, the hardware still cannot be used normally. Open the connector of 9-pin to 25-pin converter. Check whether the wiring is 2-2, 3-3 and 5-7. If it is correct, check whether the power supply of the transcoder is normal (voltage and current can be tested with a multimeter (9V, 500MA)). If there is no problem, it can be judged that the transcoder has been damaged.

2. Unable to control the decoder

There is no relay noise in the decoder.

1. Check whether the decoder is powered on.

2. Check whether the transcoder has pulled out the output 485 signal.

3. Check whether the decoder protocol is set correctly.

4. Check whether the baud rate setting is consistent with the decoder (check whether the address code setting is consistent with the selected camera (see the decoder manual for detailed address code drawing table).

5. Check whether the connection between decoder and transcoder is wrong (1-485A, 2-b; Some decoders are 1-485B, 2-A).

6. Check whether the decoder works normally (the old decoder is powered on after one minute of power failure, and whether there is a self-check sound; When the software controls the translation/tilt, there will be voltage changes between the UP, DOWN and AUTO ports of the decoder and the PTCOM port. These changes will depend on the decoder, and some of these ports of the decoder will have switching signal changes. If so, the decoder works normally, otherwise, the decoder is faulty.

7. Check whether the fuse of the decoder is burnt out.

3. Unable to control Yuntai

1. Check whether item 6 above is normal.

2. Whether the voltage output of the 24V or 220V power port of the decoder is normal.

3. Directly supply power to the upper, lower and PTCOM lines of PTZ, and check whether PTZ can work normally.

4. Check whether the power interface is connected incorrectly.

5. Check whether the circuit is connected incorrectly (the old decoder directly supplies power to PTCOM and PTCOM, and the cable is directly connected to the camera and PTZ cable; Some decoders are independently connected.

Matters needing attention

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When choosing a pan/tilt, it is best to choose a pan/tilt with a control input and a network video input/output interface installed at a fixed position of the pan/tilt, and the connecting line between the fixed position and the rotation position (that is, between cameras) is composed of a soft spiral. After installation and use, the tripod head will not damage the connecting line of the rotating part due to long-term use. Especially outdoor Yuntai.

The minimum ambient illumination of the monitoring place should be ten times higher than the minimum illumination (sensitivity) required by the camera.

The sensitivity of a color camera set outdoors or in low ambient illumination should not be greater than1.01x (f1.4), or a color camera that can automatically convert into a black-and-white image in low illumination should be selected.