CN201514478U

CN201514478U - Microwave sensor

Info

Publication number: CN201514478U
Application number: CN200920205699XU
Authority: CN
Inventors: 武光杰
Original assignee: Individual
Current assignee: Individual
Priority date: 2009-10-19
Filing date: 2009-10-19
Publication date: 2010-06-23
Anticipated expiration: 2019-10-19

Abstract

The utility model discloses a microwave sensor which utilizes the microwave Doppler effect to detect the moving of a person position or an object position, is arranged on a 46.5*40mm double-sided circuit board, and consists of a microwave oscillator, a mixer, a microwave transmitting antenna (10) and a receiving antenna (11). The microwave sensor generates a microwave signal of 10.525GHz so as to be used for detecting the position moving of the human body or the object and outputting a Doppler induction signal with low frequency. As the transmitting antenna (10) and the receiving antenna (11) of the microwave sensor are made of a copper material to be in a semi-spherical symmetrical structure and be welded on the circuit board, the covering range of the microwave signals of the sensor is led to be approximately a round shape, therefore, the induction dead zone of the microwave sensor is decreased, and the working reliability and the induction sensitivity of the microwave sensor are more greatly improved.

Description

Microwave remote sensor

Technical field

The utility model relates to X frequency range microwave signal, relates in particular to be used for the microwave remote sensor that human body or object space move.

Background technology

At present, microwave remote sensor is mainly used on the products such as security product such as alarm probe and automatically-controlled door inductor, is used for human body to move, and the output induced signal is characterized in the detection sensitivity height, and is anti-interference strong.Be operated in the X frequency range, frequency is the microwave remote sensor of 10.525Ghz, adopt the planar microstrip line, microwave-medium concussion principle design forms, microwave remote sensor transmit and receive antenna, also be designed to the symmetry made by copper foil of circuit board, planarized structure, realize mobile human body or object detection, owing to transmit and receive the limitation that antenna is subjected to the microwave remote sensor circuit board, close together, microwave signal is polarization mutually between antenna, cause the irregular distortion of microwave signal coverage of microwave remote sensor, even make sensor in certain direction closely, also sense blind area may appear, reduced the functional reliability of such microwave remote sensor.

Summary of the invention

Goal of the invention of the present utility model provides the higher microwave remote sensor of a kind of reliability, is used for surveying human body or object space moves, and produces induced signal.Be that the microwave that copper material is made dome-type is transmitted and received antenna, be welded on the circuit board of microwave remote sensor, replace sensor plane formula antenna, weaken microwave signal greatly and transmitted and received the influence of polarization mutually between the antenna, two interhemicerebral distances of emitting antenna by adjusting microwave remote sensor and receiving antenna and sphere height, can make the microwave signal coverage of microwave remote sensor, near the circle of comparison rule, the reliability of this microwave remote sensor and induction sensitivity are greatly improved.

To achieve the above object of the invention, the utility model proposes technical scheme:

A kind of microwave remote sensor, its characteristics are, on a 46.5*40mm double-sided PCB,, power divider, frequency mixer, microstrip line, emitting antenna, receiving antenna, shielding aluminium cover etc. are arranged by the microwave oscillator that HJ-FET field effect transistor and microwave-medium DRO form.The 5V power supply is connected the location staight needle by power supply with signal, power to microwave remote sensor by the microwave remote sensor source resistance, in the microwave signal shielding aluminum hull, form microwave oscillator by HJ-FET field effect transistor and microwave-medium DRO, microwave oscillator produces the microwave signal of 10.525Ghz and passes through the outside launched microwave signal of emitting antenna by the signal coupling capacitance, human body or object are arranged in investigative range when mobile, receiving antenna is input to the signal mixing that microwave mixer and microwave oscillator produce with induced signal, by mixing, low-frequency Doppler signal of wave detector output reflection human body or movement of objects.

Preferably, described circuit board uses the double-sided PCB of profile 46.5*40mm, and the installing and locating screw hole is arranged.

Preferably, circuit such as described microwave oscillator, power divider, frequency mixer are microstrip line constructions, are made by the design of double-sided PCB Copper Foil.

Preferably, microwave oscillator is made up of HJ-FET field effect transistor and microwave-medium DRO, and microwave-medium DRO adopts adhesion process to stick on the circuit board.

Preferably, microwave signal shielding aluminum hull is arranged on the described microwave remote sensor circuit board, physical dimension 36*25*6.7mm is positioned at the positive center of wiring board, and both sides respectively have two clubfoots to be fixed on the circuit board.In microwave signal shielding aluminum hull, by the microwave oscillator that HJ-FET field effect transistor and microwave-medium DRO form, power divider, frequency mixer, etc. circuit be microstrip line construction design, make by copper foil of circuit board.

Preferably, have two screw hole is installed on the circuit board, the aperture is 4.5mm, is positioned at wiring board the right and left.

Preferably, there is power supply to be connected the location staight needle with signal on the circuit board, is positioned on four limit pin of wiring board.

Preferably, described microwave remote sensor, sensor uses double-sided PCB, the one side of circuit board has electronic devices and components, and another side has the microwave emitting antenna and the receiving antenna of symmetrical structure, is made by copper material, be welded on the circuit board, be positioned at circuit board the right and left.

Preferably, described microwave remote sensor, sensor emission antenna and receiving antenna are the hemisphere face circle, and diameter is 4.16mm, highly are 1.3～4.7mm, and two hemisphere spacings of every group of antenna are 10.1～20.7mm.

Preferably, described microwave remote sensor, two interhemicerebral distances of microwave emitting antenna by adjusting sensor and receiving antenna and sphere height can change the microwave signal coverage of sensor, make the microwave signal coverage of sensor, near the circle of comparison rule.

As can be seen from the above technical solutions, the utility model microwave remote sensor, be on a 46.5*40mm double-sided PCB, a microwave signal shielding aluminum hull is set, in microwave signal shielding aluminum hull, the microwave oscillator that design is made up of HJ-FET field effect transistor and microwave-medium DRO, power divider, circuit such as frequency mixer, the microwave signal of the 10.525Ghz that microwave oscillator produces, pass through the outside launched microwave signal of emitting antenna by the signal coupling capacitance, human body or object are arranged in investigative range when mobile, receiving antenna is input to microwave mixer with induced signal, with the signal mixing of microwave oscillator generation, by mixing, low-frequency Doppler signal that wave detector output reflection human body or object space move, thus realize detecting function that human body or object space are moved.The induced signal of this microwave remote sensor can be extensively owing to the indoor and outdoor safety precaution, the human body or the object space Moving Target Exploitation in fields such as industrial electrical equipment or equipment automatization control.

Description of drawings

Fig. 1 is the fundamental block diagram of the utility model microwave remote sensor;

Fig. 2 is the circuit diagram of the utility model microwave remote sensor;

Fig. 3 is components and parts location drawing of the utility model microwave remote sensor circuit board;

Fig. 4 is the utility model microwave remote sensor circuit board another side aerial position figure;

Fig. 5 is the microwave horizontal beam coverage area diagram of the utility model microwave remote sensor;

Fig. 6 is the microwave vertical beam coverage area diagram of the utility model microwave remote sensor.

Embodiment

Below in conjunction with drawings and Examples the utility model is further specified.

As Fig. 1～shown in Figure 4, the utility model microwave remote sensor is on the double-sided PCB of a 46.5*40mm, is provided with a 36*25*6.7mm microwave signal shielding aluminum hull, and is fixed on the center position of circuit board by 4 clubfoots.In microwave signal shielding aluminum hull, the power supply of 5V is given the microwave oscillator circuit supply through source resistance R, forms microwave oscillator by HJ-FET field effect transistor and microwave-medium DRO, produces the 10-12GHz microwave signal.Because microwave signal frequency is higher, with microwave oscillator circuit, power divider circuits, mixer and mixing wave detector, all adopts microstrip line construction, make by the copper foil of circuit board design, and microwave-medium DRO then adopts adhesion process, sticking being posted on the circuit board of microwave remote sensor.

The generation 10.525GHz microwave signal of microwave oscillator, be input to power divider and emitting antenna T by signal coupling capacitance C, by the outside directional transmissions microwave of emitting antenna T, in the investigative range of sensor, do not have human body or movement of objects, the mixing wave detector is not responded to Doppler signal output.

Have human body or object in its investigative range when reaching mobile, receiving antenna R is with the microwave signal of sensing, be input in the mixer, behind the signal mixing by power divider circuits and microwave oscillator generation, by mixing wave detector D output 30-100Hz low frequency Doppler signal IF, the frequency of this signal can reflect the speed of human body or movement of objects, and the amplitude reflection human body of signal or object size and object are from sensor distance.

Microwave signal coverage of the present utility model, as Fig. 5～shown in Figure 6, the microwave signal emitting antenna T of microwave remote sensor and receiving antenna R adopt copper material to make the dome-type structure, be welded on the circuit board of wave sensor, changed traditional micro strip line type, the plane formula structural antenna, weaken microwave signal greatly and transmitted and received the influence of polarization mutually between the antenna, make the microwave signal coverage of this microwave remote sensor, circle near comparison rule, in the effective induction range of sensor, microwave signal has covering more uniformly, has eliminated the sense blind area of microwave remote sensor substantially, has improved the reliability of this microwave remote sensor.

The utility model microwave remote sensor has characteristics:

1: the frequency of operation height, antijamming capability is strong.

2: circuit board adopts the microstrip line construction design, uses components and parts few, with low cost.

3: power supply input and signal output are on four angles of circuit board, and is simple and easy to use.

4: microwave signal coverage rule, the reliability of sensor and induction sensitivity height.

As can be seen from the above technical solutions, the microwave signal that the utility model microwave remote sensor produces, by emitting antenna T on the microwave remote sensor circuit board and receiving antenna R, can realize the detection of mobile object or mobile human body, the Doppler signal of output lower frequency, this signal can be widely used in fields such as human body or object induction light fixture, induction energy saving electrical equipment, automatic camera equipment and automatic body induction control device through after the processing and amplifying.

The above embodiment has only expressed several embodiment of the present utility model, and it describes comparatively concrete and detailed, but can not therefore be interpreted as the restriction to the utility model claim.Should be pointed out that for the person of ordinary skill of the art under the prerequisite that does not break away from the utility model design, can also make some distortion and improvement, these all belong to protection domain of the present utility model.Therefore, the protection domain of the utility model patent should be as the criterion with claims.

Claims

1. microwave remote sensor is characterized in that:

These microwave remote sensor circuit board top components and parts are provided with: microwave remote sensor circuit board (1), set screw hole 4.5mm (2); The 5V power supply is connected location staight needle (3) by power supply with signal, by microwave remote sensor source resistance (9), power to microwave remote sensor; In the microwave signal shielding aluminum hull 36*25*6.7mm (4), there are HJ-FET field effect transistor (5) and microwave-medium DRO (6) to form microwave oscillator, the microwave signal that produces 10.525Ghz is passed through outwards launched microwave signal of emitting antenna (10) by signal coupling capacitance (8), human body or object are arranged in investigative range when mobile, receiving antenna (11) is input to microwave mixer with induced signal, signal mixing with the microwave oscillator generation, by mixing, low-frequency Doppler's induced signal that detector diode (7) output reflection human body or object space move.

2. microwave remote sensor according to claim 1 is characterized in that: microwave oscillator has HJ-FET field effect transistor (5) and microwave-medium DRO (6) to form, and microwave-medium DRO (6) adopts adhesion process to stick on the circuit board.

3. microwave remote sensor according to claim 1, it is characterized in that: microwave remote sensor circuit board profile 46.5*40mm (1), microwave signal shielding aluminum hull 36*25*6.7mm (4) is arranged on the circuit board, be positioned at the positive center of wiring board, both sides respectively have two clubfoots to be fixed on the circuit board; The screw hole 4.5mm (2) of installation is arranged on the circuit board, be positioned at wiring board the right and left; There is power supply to be connected location staight needle (3) with signal on the circuit board, is positioned on four limit pin of wiring board.

4. microwave remote sensor according to claim 1, it is characterized in that: on the microwave remote sensor circuit board, in microwave signal shielding aluminum hull 36*25*6.7mm (4), HJ-FET field effect transistor (5) is arranged, microwave-medium DRO (6), mixing, detector diode (7), microwave emitting antenna coupling capacitance (8), microwave remote sensor source resistance (9) electronic devices and components.

5. microwave remote sensor according to claim 1 is characterized in that: sensor circuit adopts the microstrip line construction design, and microstrip line is made by the design of circuit board Copper Foil, is positioned at microwave signal shielding aluminum hull 36*25*6.7mm (4).

6. microwave remote sensor according to claim 1, it is characterized in that: sensor uses double-sided PCB, the one side of circuit board has electronic devices and components, another side has the microwave emitting antenna (10) and the receiving antenna (11) of symmetrical structure, make by copper material, be welded on the circuit board, be positioned at circuit board the right and left.

7. microwave remote sensor according to claim 6, it is characterized in that: emitting antenna of microwave remote sensor (10) and receiving antenna (11) are the hemisphere face circle, diameter is 4.16mm, highly is 1.3～4.7mm, and two hemisphere spacings of every group of antenna are 10.1～20.7mm.

8. microwave remote sensor according to claim 6 is characterized in that: adjusts two the interhemicerebral distances and the sphere height of the microwave emitting antenna (10) of sensor and receiving antenna (11), can change the microwave signal coverage of sensor,