First, look at milk identification The milk that is squeezed out by hand is honey-colored, paste-like and non-flowing. Most of them are pregnant cows. If it is white, and if it is squeezed out naturally, it will be an empty cow. Second, look at breast recognition The breasts are swollen, the nipples are hard and straight, and are pregnant cows. The breasts do not swell and the teats are not hard and straight. Third, look at the bull's eye Immediately above the pupil of the pregnant cow's pupil, three particularly prominent upright blood vessels appear on the iris, the so-called pregnancy vessels, which fill up the surface of the iris and appear purple. The blood vessels on the iris of pregnant cows did not appear to be small. Fourth, to see oral recognition Open the mouth of the cow and look at the sublingual meat on both sides of the mouth. If it is bright red, it is a pregnant cow. If it is pink or light red, the cow is not pregnant. Fifth, using pressure abdominal recognition The person stands on the left side of the cow facing the rear, with his left hand assisting the cow's back and the right hand gently pressing on the left intestine. If something touches and hits the hand, or if something touches the belly, the cow is pregnant. . Sixth, using alcohol test Take 100 milliliters of fresh milk from the cows to be tested and place them in sterile glassware. Add 1 milliliter of medical alcohol, 1 milliliter, into fresh milk. Mix thoroughly. If condensation occurs within 5 minutes, prove that The cow is already pregnant and if she does not gather until half an hour later, she is not pregnant. Seven, see tail identification When the cow's tail does not sway, if the cow is covered and left or right tilted, the cow is pregnant. If the tail is covering the middle vertically, it means there is no pregnancy. When installing security Outdoor Camera, you should first choose the monitoring host. Do you want to add a monitoring card to your computer, or do you want to use an embedded hard disk recorder as your monitoring host. The computer monitoring card is more suitable for places that are familiar with computer installation, have professional personnel on duty, and have more functional requirements. Its overall investment is relatively low. Since the monitoring card is installed in the computer, the computer needs to be started 24 hours a day; As for the latter, it does not require professional knowledge, nor does it need to be on duty, and it is relatively simple to operate. Outdoor Network Wireless Camera,Network Wifi Camera,4g Outdoor Solar Powered Camera,Solar 4g Cameras,Solar Powered Cctv Camera Shenzhen Fuvision Electronics Co., Ltd. , https://www.szsolarcamera.com
To install security monitoring equipment, it is necessary to determine how many cameras are installed, and the quality and monitoring range of the cameras are affected. It is preferred to determine how many cameras are used for monitoring, and then determine the camera lens monitoring range according to how many cameras are available. Therefore, the distance from the camera to the monitoring point and the monitoring area must be clear. The infrared supply network recommends using the camera of 480 TV line, because it is more in line with that definition.
When installing security monitoring equipment, the third consideration is whether the camera has night vision function. If the monitoring is installed in a dark place, it is necessary to consider using a camera with infrared night vision function.
The security monitoring equipment can be installed via wired or wireless transmission. Although the cost of wireless network is relatively high, it can save a lot of installation trouble and make the monitoring site more beautiful. However, the installation of wireless network monitoring equipment should take into account the environmental problems of security sites. Cement building materials will shorten the wireless transmission distance, and metal building materials may complete the shielding of wireless signals. The infrared transmitter and infrared receiver should be far away from other appliances to avoid interference. Because the price of wireless network is almost twice that of wired transmission monitoring equipment, I suggest using wired transmission installation.
On site monitoring and network monitoring When determining the installation of the monitoring system, you should consider whether you need network functions. That is, if you need to monitor and control the monitoring site on the Internet at any time, you need to select a monitoring host with network functions. Avoid no network transmission function after installation.
A complete security monitoring equipment should at least have three parts: surveillance camera, PTZ and decoder. The following are their installation methods: