CN102305931A

CN102305931A - Microwave detecting method for recognizing movement locus of object

Info

Publication number: CN102305931A
Application number: CN201110211082A
Authority: CN
Inventors: 张德军; 张德民
Original assignee: YINGKERUI ELECTRONIC TECH Co Ltd TIANJIN CITY
Current assignee: YINGKERUI ELECTRONIC TECH Co Ltd TIANJIN CITY
Priority date: 2011-07-27
Filing date: 2011-07-27
Publication date: 2012-01-04

Abstract

The invention relates to a microwave detecting method for recognizing a movement locus of an object. The method comprises the following steps: firstly, a parameter setting module sets a designated area for emitting an electromagnetic wave of a radar probe module; the radar probe module emits the electromagnetic wave to the designated area, receives a microwave signal reflected by a movement object and outputs the microwave signal to an amplifying module; the amplifying module transmits the received microwave signal to a single chip computer after detecting and amplifying the received microwave signal; a single chip computer processing module judges whether the received microwave signal is effective or not according to the change rule of the reflected microwave signal; if the received microwave signal is effective, the single chip computer outputs a drive signal to an output drive module; and the output drive module directly outputs the signal or outputs the signal by a contact point of a relay after amplifying the signal. The invention can rapidly detect the displacement and direction of the movement object in the ranges of setting distance (generally 4 meters) and setting angle (horizontal angle 80 degrees and vertical angle 32 degrees) and recognize the movement object with speed between 5cm/s and 100cm/s.

Description

A kind of microwave sounding method of recognition object movement locus

Technical field

The present invention relates to a kind of microwave sounding method of recognition object movement locus, particularly be applied to the detection of the mobile object (passenger) in the staircase Energy Saving Control.

Background technology

In the existing staircase energy-conserving control technology, how accurately judgment object direction of motion, displacement, thus confirm that movement locus of object is the problem that in staircase Energy Saving Control and the control of market automatically-controlled door, often runs into.Detecting the frequent technology that adopts of mobile object (mainly referring to the passenger) is: infrared sensor, ultrasonic sensor or mechanical switch, and these technology mainly include:

1, patent " induction type the energy saving escalator " (patent No.: ZL201020209963.X) disclose a kind of induction type energy saving escalator control method; This method " is provided with an infrared inductor in the porch of escalator, the control circuit control linkage of said infrared inductor and elevator ".Its deficiency is, infrared inductor can not be judged passenger's track route when detecting the passenger, does can only judge have the people within the specific limits? Thereby often send false judgment, cause staircase no-load running.

2, (patent No.: ZL201010132830.1) disclose a kind of staircase inlet human inductor method for designing, the major technique content is patent " a kind of staircase inlet human inductor ": " comprising power-supply circuit, ultrasonic transmitter-receiver and supporting driving circuit and feedback signal treatment circuit thereof in the structure of human body signal Acquisition Circuit ".Its deficiency is, ultrasonic sensor omission occurs when detecting the object of fast moving easily, cause the passenger to go on the staircase, but staircase is not received passenger's signal, thereby staircase continues to keep low speed or halted state, influenced the normal operation of staircase.

Summary of the invention

The present invention seeks to solve how accurately judgment object direction of motion, displacement, thereby confirm the problem of movement locus of object, a kind of microwave sounding method of recognition object movement locus is provided.

The hardware system of the microwave sounding method foundation of recognition object movement locus provided by the invention mainly comprises: radar probe module 1, microwave signal amplification module 2, single chip processing module 3, output driver module 4, parameter are provided with module 5 and power transfer module 6.

The concrete steps of this method are:

1st, at first the appointed area that module is provided with radar probe module launching electromagnetic wave is set, comprises: detect distance and detection angles by parameter;

2nd, by the radar probe module to the appointed area transmission frequency be 2.39GHZ to the electromagnetic wave the 2.41GHZ, receive the microwave signal of mobile object reflected back simultaneously, and the microwave signal that receives exported to amplification module;

3rd, the microwave signal amplification module carries out detection and signal amplification with radar probe module microwave signal output, the mobile object reflected back; And the square-wave signal MW_AN after will amplifying is transferred to single chip processing module, the voltage range of the square-wave signal MW_AN after amplifying through the microwave signal amplification module at 0V between the 2.5V;

4th, single chip processing module square-wave signal that microwave signal amplification module transmission is come, after amplifying is handled; Single-chip microcomputer is judged the direction of motion and distance of mobile object according to the Changing Pattern of the microwave signal of reflected back: when the direction of motion of mobile object is parallel with electromagnetic transmit direction; The microwave signal frequency of reflected back is high; Frequency at 200HZ between the 250HZ; And mobile object is at the same rate when moving perpendicular to electromagnetic transmit direction; The microwave signal frequency of reflected back is low, frequency at 50HZ between the 200HZ; Object distance radar probe module is near more, and the microwave signal of reflected back is strong more, and the relation between the MW_AN signal after object distance and process microwave signal amplification module amplify is: distance=MW_AN*1.6 rice/volt, and wherein the unit of MW_AN is a volt; Does single-chip microcomputer judge according to the detection distance of setting whether the microwave signal that receives effective? If detecting distance with the interior microwave signal that receives the mobile object reflected back, then single-chip microcomputer is to output driver module output drive signal RELAY;

5th, the output driver module (through transistor Q3, the element model: 9013) single-chip microcomputer signal RELAY is amplified the back directly output or drive relay (element K1, model: RELAY-SPST), the contact output through relay again.

Described detection distance be meant from the radar probe to the dead ahead 4 meters with interior scope; Described detection angles is meant level angle 80 degree, and vertical angle 32 degree are with interior oval conical region.

Advantage of the present invention and good effect:

The microwave sounding method of recognition object movement locus provided by the invention; Adopt microwave principle to detect mobile object (passenger); It is through sending the electromagnetic wave of 2.4GHZ; Can be at setpoint distance (common 4 meters), set angle (level angle 80 degree; Vertical angle 32 degree) express delivery detects displacement, the direction of mobile object in the scope, can recognition speed at 5 cels to the moving object between 100 cels.

Description of drawings

Fig. 1 is the structural representation of the hardware system of foundation of the present invention;

Fig. 2 is an electrical schematic diagram of the present invention;

Fig. 3 is the application synoptic diagram of the present invention in the staircase Energy Saving Control.

Among the figure, 1 radar probe module, 2 microwave signal amplification modules, 3 single chip processing module, 4 output driver modules, 5 parameters are provided with module, 6 power transfer module, 7 handrails, 8 steps, 9 microwave sounding sensors, the search coverage of 10 sealings.

Embodiment

Embodiment 1

As depicted in figs. 1 and 2, the present invention comprises that mainly radar probe module 1, microwave signal amplification module 2, single chip processing module 3, output driver module 4, parameter are provided with module 5 and power transfer module 6.

Radar probe module 1 comprises probe interface and reflection wave hysteresis loop circuit two parts, the outside radar transceiver (model: IPM-165) that connects of probe interface; (the chip model: two-stage amplifying circuit LM324) constitutes reflection wave hysteresis loop circuit, and its input signal is from the output of outside radar transceiver, and the output signal of reflection wave hysteresis loop circuit is MW_SIG by U1.

The function of radar probe module 1 is to level angle 80 degree; The electromagnetic wave of emission 2.4GHZ (scope is that 2.39GHZ is to 2.41GHZ) in the zone of vertical angle 32 degree; Receive the microwave signal of mobile object reflected back simultaneously, send to the microwave signal amplification module through the signal MW_SIG after the reflection wave hysteresis loop processing of circuit.

Microwave signal amplification module 2 comprises that mainly (the element model: LM324), its function is that hysteresis loop output signal MW_SIG is carried out shaping, amplification and detection to two amplifying circuits, and direction signal MW_PLUS and distance signal MW_AN after the processing are transferred to single-chip microcomputer.When the direction of motion of mobile object is parallel with electromagnetic transmit direction; The microwave signal frequency of reflected back is high; Frequency at 200HZ between the 250HZ; And mobile object is at the same rate when moving perpendicular to electromagnetic transmit direction; The microwave signal frequency of reflected back is low, frequency at 50HZ between the 200HZ; Object distance radar probe module is near more, and the microwave signal of reflected back is strong more, and the relation between the MW_AN signal after object distance and process microwave signal amplification module amplify is: distance=MW_AN*1.6 rice/volt, wherein the unit of MW_AN is a volt.

Single chip processing module 3 mainly comprises single-chip microcomputer U2 (chip model: STM32F101C8); Its function is to gather the frequency signal MW_PLUS (No. 46 pins of U2) and the distance signal MW_AN (No. 19 pins of U2) of moving object; Is there there object of which movement in judgement, the detection surveyed area? If object of which movement is arranged, can get into surveyed area through LED1 green indicating lamp directing object in surveyed area.If object of which movement continued more than 1 second, single-chip microcomputer can be exported signal RELAY (No. 41 pins of U2) and give the output driver module, simultaneously through LED2 red led indication output signal.

9013) and relay K 1 (element model: RELAY-SPST) output driver module 4 mainly comprises triode Q3 (element model:; Its function is through transistor Q3 (element model: 9013) single-chip microcomputer signal RELAY is amplified the back and directly export or drive relay K 1 (element model: RELAY-SPST), pass through the contact output of relay K 1 again.

Parameter is provided with the switch S 1 that mould 5 comprises four, and wherein DIP4 representes coarse adjustment, and OFF represents long-range detection, and distance is between 2 meters-4 meters; ON represents proximity detection, and distance is in 2 meters; DIP1,2,3 expression fine settings, numerical value is big more, and distance is far away more; Numerical value is more little, and distance is near more.

Power transfer module 6 mainly comprises power source conversion cable V1 (element model: SPX1117); Its function is that the DC5V power source conversion with outside input becomes the DC3.3V power supply, offers radar probe module 1, microwave signal amplification module 2, single chip processing module 3, output driver module 4, parameter and module 5 is set uses.

Embodiment 2

As shown in Figure 3, the application example of the present invention in the energy-conservation chamber system of staircase.

Respectively installing below the handrail 7 of the porch of staircase the right and left about 9, two sensor introversions of an object of which movement microwave sounding sensor, 30 degree, facing upward simultaneously about 15 degree, constituting the search coverage 10 of a sealing in the staircase porch.When the passenger near the staircase pedal, when the staircase mouth is walked, will trigger wherein one or two sensors.Signal of sensor sends in the control system of staircase, and the control system of staircase can start staircase, and when the passenger set foot on step 8, staircase is (normal speed) operation at a high speed, in the shortest time, the passenger is delivered to upstairs.

Claims

1. the microwave sounding method of a recognition object movement locus; The hardware system that it is characterized in that this method foundation mainly comprises: radar probe module, microwave signal amplification module, single chip processing module, output driver module, parameter are provided with module and power transfer module, the concrete steps of this method Be:

5th, the output driver module amplifies directly output or drive relay of back with the drive signal RELAY of single-chip microcomputer output, again the contact output through relay.

2. method according to claim 1, it is characterized in that described detection distance be meant from the radar probe to the dead ahead 4 meters with interior scope; Described detection angles is meant level angle 80 degree, and vertical angle 32 degree are with interior oval conical region.