Microwave motion sensor: operating principle, purpose

Motion sensors of the microwave type (infrared) are used to protect objects in the room, as well as in open areas. The device consists of a sensor and a converter. Expander for models is installed with filters. The sensor connects to the receiver.

Some modifications use a regulator. The main parameters of the models include conductivity, the maximum signal interruption time, the angle of coverage, and the range of action. Buy a high-quality IR motion sensor in our time can be priced from 7 thousand rubles.

Principle of operation of devices

The principle of the device is based on the trapping of microwave pulses. In this case, the sensor is responsible for the conductivity of the signal. The expander itself creates short-wave pulses. To increase the range of the device, a receiver is used. The signal is transmitted to the converter via a transceiver. Modifications with regulators are equipped with microcircuits.

If we talk about sensitive devices, then they use a contact receiver. It is installed behind the sensor. Data transfer to the converter can be carried out via a modulator.

Models for the house

Models for the house are mainly made with two sensors. The moisture resistance system is used by the SK series. In this case, the limiting frequency does not exceed 20 Hz. The threshold sensitivity of the transmitters is at the level of 3 mV. Some models use a wired thyristor. The dimensions of the sensors are quite different. Install the model on the wall. The devices are powered by a 20 and 30 V power supply. For many modifications, the receiver is used without a filter. In size they are compact.

The body is most often made of a polymer. It is also important to note that modifications with overlays are available on the market. The viewing angle is quite high. Another attention deserves a model with two adapters. The indicator of energy consumption is high. However, the maximum range is 170 meters. The minimum permissible operating temperature of microwave models for a home varies around -20 degrees. Buy a good infrared sensor on the market can be for 8 thousand rubles.

Devices for shops

For shops in the market are represented low-frequency and thyristor devices. The first option involves the use of unijunction capacitors. Their power is low. The range of action for sensors of this type, as a rule, is at a level of 80 meters. The signal is transmitted via the adapter. Transducers for the motion sensor (microwave) are installed with different conductivity. The minimum permissible operating temperature is -20 degrees on average. The system of protection against moisture is used in various series.

Install models with adapters only on the wall. The mounting height in this case depends on the viewing angle. Also consider the dimensions of the sensor. If we consider thyristor sensors, then they are able to boast of great conductivity. The range of action for the modification is on average 210 meters. Receivers are used with transient filters. The power supply units for the connection are selected at 20 and 30 V. Some sensors use an overvoltage protection system.

The alarm mode is adjusted via the controller. The volume of the audio signal is set via the control unit. Installed models of this type, as a rule, at an altitude of 1.4 meters. Buy a high-quality infrared sensor on the market can be for 6 thousand rubles.

Warehouse modifications

Modifications for warehouses have a long range. Sensors for models are used with transient filters. Transmitters on the motion sensor (microwave) are often installed without plates. Some models have a thyristor. Connection to the power supply is via the adapter. The parameter of the minimum frequency of microwave devices is 10 Hz.

The degree of protection of the sensors is quite different. In the market there are many models with horizontal racks. To fix them, screws are used. The accuracy of the object definition is no more than 0.2%. It is worth a good IR sensor movement on the market 9 thousand rubles.

Features of short-wave type sensors

Sensors of this type are best suited for home use. Expanders at them are used with wire condensers. Their range is not high. However, it is important to note that the average sensor frequency is 23 Hz. The system of protection against moisture in them is used by the series of CS. Receivers for the motion sensor (microwave) are selected both digital and analog type.

To adjust the viewing angle, the controllers are used. Many models do not have a filter. The accuracy of the object definition fluctuates around 0.3%. The conductivity of the signal in the models is about 5 microns. In terms of size, the devices are compact and on the wall are invisible. The system is rarely installed from hacking. It is also important to note that in the market there are modifications with vertical holders. Install them only on racks.

The interruption time for a good model is 2 seconds. Sensitivity of the ukase type sensors is quite different. For warehouses, devices do not fit well. Buy a good mini-sensor movement in the store can be for 8500 rub.

Modifications with 3 A transducers

Microwave sensors with index converters are great for protecting large areas. Expanders for devices are selected often resistor type. Modulators are used to protect models from hacking. In some cases, the converters are installed via a loop. Power supplies for devices are used at 30 V.

The system of protection against moisture in the modifications is applied to the series of CS. Models with controllers on the market are rare. The limiting sensitivity of the sensors is at the level of 5.4 mV. The conductivity of the models does not exceed 3 microns. The cost of the device is quite different. If we consider modifications with thyristors, then they have high-frequency receivers. They cost about 12 thousand rubles. The motion sensor (microwave) without a thyristor will cost the buyer 8500 rubles.

Devices for 5 A

Modifications with 5 A converters are more suitable for small rooms. Typically, the power supplies for them are selected at 15 V. Condensers are often used in a two-junction type. Adapters for models are selected for low sensitivity. The conductivity parameter of the devices averages 4.3 μ. Thyristors for modifications are very rarely used. The accuracy of the definition of objects depends on the transmitter.

The signal to the power supply is mainly transmitted via the loop. Some modifications use two capacitors. The electric power consumption parameter of the sensors is 350 W. Modifications with vertical and horizontal racks are sold. They are installed at an altitude of 1.3 meters. For many models, the viewing angle can be adjusted. In the store, a quality sensor of the type presented is available to the user at a price of 7 thousand rubles.

Models with a 10 A converter

Sensors with 10 A converters are very popular. However, it is important to note that they do not differ in compact dimensions. Condensers are often installed in impulse type. The wavelength of the sensors depends on the adapter. Modifications with expanders are rare. For open territories, the models are not bad. The system of protection against breaking is used by the third class.

The average conductivity of the sensors does not exceed 5.5 microns. The angle of the girth of the territory depends on the size of the sensor. It is also important to consider the height of its installation. On average, the permissible operating temperature of the models is -30 degrees. The interruption time can be adjusted. To do this, the controller uses a modulator. There is a model on the market of about 10 thousand rubles.

Application of models with diffusers

Modifications with a diffuser are used to protect storage facilities. The sensitivity parameter is rather high. If we consider high-frequency devices, then the range of action they have is at the level of 170 meters. The system of protection against hacking is used first or second class. The sensors are selected with filters. The sensitivity parameter does not exceed 4 mV.

For small rooms, devices are rarely used. On the market, as a rule, modifications with horizontal racks are presented. Holders for them are selected with screws. Mounted model at an altitude of about 2 meters. Receivers in devices are used with adapters. Buy the device can be priced from 9 thousand rubles.

Features of sensors type "Alpha"

This microwave motion sensor for lighting is often used in stores. The main advantage of the modification can be called high conductivity. The signal in this case is transmitted via a loop. The system of protection against breaking is used first class. The user can adjust the sensor angle of the sensor. The adapter is installed behind the controller.

An extender responds to the signal from the converter. The stand of the model is installed in an upright position. The sensor is attached to the screws. The recommended installation height is 1.6 meters. There is no moisture protection system in the device. The permissible operating temperature is -30 degrees.

The interruption time is set manually. The threshold sensitivity of the sensor of the presented series is 4.4 mV. The maximum power consumption is 320 W. Power supplies for the operation of devices are used at 15 V. It is also important to note that this model is often used in the "Smart House" system. The price of the device varies around 8800 rubles.

Sensors series WS-301

This ultrasonic motion sensor is in demand in security agencies. The power supply in the device is applied at 20 V. If you believe the feedback of experts, the receivers of the models are of high quality. The conductivity parameter of the sensor is 4.7 microns. The receiver is installed through the loop. Directly the body is applied with a moisture-proof overlay.

The indicator of electricity consumption is at the level of 320 W. Condensers are of a commutated type. Thus, system failures are rare. Thyristors are used to protect the device from break-ins. The grip angle in this model can not be adjusted. The controller does not have a sensor. Buy a model can be priced from 6900 rubles.

Purpose of sensors of class WS-305

The sensors of the presented series are suitable for premises with an area of 20 sq. M. Meters. Modifications are installed on wide horizontal racks. To connect the device uses a 10 V power supply. The parameter of the maximum power consumption is at the level of 360 W. The vertical viewing angle can be adjusted if necessary. Transmission of the signal from the unit is carried out by means of an adapter.

The dilator on the motion sensor for the house is installed in a single-pole type. If you believe the responses of experts, the problems with high humidity device are not terrible. The protective lining of the model is provided. The rack to the body is attached with screws. The range of the system is 140 meters. The thyristor is absent in this case. It is also important to note that this movement sensor is for signaling on the market 8800 rub.

Features of sensors type DDVS803

The presented motion sensor for signaling is in demand among the owners of stores and warehouses. The viewing angle can be adjusted using the controller. The sensor is highly conductive. The motion sensor is switched on via the 10 V power supply. The modulator is not provided by the manufacturer. Adjust the sensitivity of the device is not possible. If you believe the experts, the rack is of high quality.

There are two latches for fastening. The receiver in the model is rated at 22 Hz. Problems with false triggers occur infrequently. The accuracy of the object definition is no more than 0.3%. It should also be mentioned that this model is often used in the "Smart House" system. The price for modification varies around 9 thousand rubles.