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| Engineering debugging of infrared beams detector |
| 2021.10.20 |
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(1) Adjust the optical axis of the projector
Open the outer cover of the probe, aim your eyes at the sight, and observe the influence inside the sight. The optical lens of the probe can be directly adjusted left and right within 180° by hand, and the up and down adjustment screws under the lens can be adjusted with a screwdriver. The lens system has up and down adjustment screws. The adjustment range of 12° is adjusted repeatedly to make the influence of the opponent's detector in the sight fall into the center position. Be careful not to cover the optical axis during the adjustment process, so as not to affect the adjustment work. The adjustment of the optical axis of the projector has a great influence on the sensitivity performance of the defense zone. Please be sure to follow the correct steps to carefully and repeatedly adjust.
(2) Adjustment of the optical axis of the receiver
Step 1: Perform preliminary adjustment of the optical axis of the receiver according to the same method as "Adjustment of the optical axis of the emitter". At this time, the red warning indicator on the light receiver is off, the green indicator light is on and there is no flicker, which means that the optical axis of the sleeve is normal, and the projector and the receiver function normally.
Step 2: There are two small holes on the light receiver, which are marked with "+" and "-" respectively, which are used to test the infrared intensity felt by the light receiver. The value is expressed by voltage, which is called photosensitive voltage. Insert the test leads (red "+", black "-") of the multimeter into the photosensitive voltage of the light receiver. Adjust the lens system repeatedly to make the photosensitive voltage value reach the maximum value. In this way, the working condition of the probe has reached the best condition.
Precautions:
The four-beam detector has two sets of optical systems, which need to cover the upper and lower mirrors of the receiver respectively, and adjust to
Until the upper and lower photosensitive voltage values are the same. The two sets of optical systems of the older four-beam detectors are adjusted separately. Due to the corresponding relationship between the four optical systems of the transmitter and the receiver, the two probes are involved, it is quite difficult to adjust, and it needs to be adjusted carefully, and it will be improperly handled. There is a false alarm or a protection dead zone. The ABF four-beam detector has integrated the two parts into one adjustment, making the engineering construction much easier.
(3) Shading time adjustment
There is a shading time adjustment button on the light receiver. Generally, the shading time of the probe is adjustable between 50m/s ~ 500m/s. When the probe is shipped from the factory, the shading time of the probe is adjusted to a standard position in the factory. This position is a relatively moderate state, considering the environmental conditions and the characteristics of the probe itself, so there is no special reason, and there is no need to adjust the shading time. If it is necessary to adjust the shading time due to fortification, to adapt to the changes in the environment. Generally speaking, when the shading time is short, the sensitivity of the probe is fast, but the sensitivity to falling leaves, flying birds, etc. is also strong, and the possibility of false alarms increases. The shading time is long, the sensitivity of the probe is reduced, and the possibility of underreporting increases. Engineers should be based on the actual needs of fortification
To adjust the shading time.
(4) The link between the infrared through-beam detector and the anti-theft host
After the probe is set, connect the tamper switch to the input circuit of the defense zone. After the wiring is completed, cover the probe shell and tighten the fastening screws. It is required that the warning light of this zone on the anti-theft host should not flicker or light up, and the zone has no alarm indication output. Indicates that the entire defense zone is set up normally. Otherwise, check the circuit, re-adjust the probe, and re-determine the state of the defense zone.
(5) Performance test of infrared detector
After the defense zone is in normal working condition, according to the requirements of fortification, use objects of all possible sizes and shapes similar to the defense, use different speeds and different ways to block the optical axis of the probe, and use wireless walkie-talkies to contact the control center at the alarm site. Check whether the alarm condition is normal, and pay attention to whether there is flashing or unstable state on the alarm host. So as not to leave hidden dangers to the alarm system. We verbally call this process the firing test. The purpose of the firing test is to test whether the defense area has the ability to normally alarm, whether the protection range of the defense area can meet the predetermined requirements, and whether there is a protection dead zone.
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