CN102930742B - Circuit structure of ultrasonic parking place detector - Google Patents
Circuit structure of ultrasonic parking place detector Download PDFInfo
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- CN102930742B CN102930742B CN201210433785.2A CN201210433785A CN102930742B CN 102930742 B CN102930742 B CN 102930742B CN 201210433785 A CN201210433785 A CN 201210433785A CN 102930742 B CN102930742 B CN 102930742B
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Abstract
The invention relates to a circuit structure of an ultrasonic parking place detector. The circuit structure is connected with a single-chip microcomputer through the input end of an ultrasonic driving circuit, an ultrasonic sensor is connected with the input end of a received signal amplification and detection circuit, the output end of the received signal amplification and detection circuit is connected to the single-chip microcomputer, the gain control end is connected to a single-chip microcomputer port through an output expander, an oscillating circuit and a watchdog circuit are respectively connected with corresponding ports of the single-chip microcomputer, a transistor-transistor logic (TTL) serial communication port of an RS-422 communication circuit chip is connected with a communication port of the single-chip microcomputer, the input end of a power circuit is connected with external 24V direct current, a driving indicating circuit is connected with the single-chip microcomputer port through the output expander, and an input expander is used for connecting a dial switch so as to set up parameters and input the parameters to the single-chip microcomputer. The circuit structure of the ultrasonic parking place detector enables a parking place guide system to guide vehicles automatically to enter empty parking places rapidly, reduces cost of managers, eliminates troubles for searching parking places, saves time, and enables images of parking lots to be perfect.
Description
Technical field
The present invention relates to a kind of ultrasonic detector circuit, especially ultrasound wave parking space detector circuit structure, belongs to ultrasonic detection technology and intelligent transportation field.
Background technology
Along with Modernization, international development, city dweller's car owning amount sharply increases, and in crowded urban district, the contradiction between automobile and parking stall is more and more outstanding.Public parking lot day by day cannot meet increasing parking demand.How to make full use of the demand of berthing that limited parking lot resource at utmost meets vehicle, become current urgent problem.
The ubiquitous problem in parking lot has at present: 1, in field, also have on earth how many parking stalls to use, supvr knows nothing, can only be by manually going prospecting.2, the person of parking enters and cannot enter rapidly parking spot behind parking lot and park cars, the vacant parking stall of unordered mobile searching inside, and the A-road resource of coming in and going out in not only taking, even can cause site inside accesses to block up.3, must be equipped with a large amount of full-time executives artificial guided vehicle in parking lot and park, increase parking lot management cost.4, supvr cannot add up the vehicle flowrate of different times every day in time, can not optimize in time parking stall resource distribution, causes parking lot utilization factor low.
Summary of the invention
The object of the invention is to overcome above-mentioned weak point, thereby provide a kind of circuit structure of ultrasound wave parking space detector, the circuit structure of this detecting device
energyto car owner, provide a kind of safer, comfortable, convenient, fast and open environment, realize high efficiency, energy-saving, the environmental protection of parking lot operation; Other equipment and the software application of matching vehicle position guidance system, make parking stall inducible system enter fast empty parking space by automated guided vehicle, reduces managerial personnel's cost, eliminates the worry of finding parking stall, saves time and make parking lot image more perfect.
According to technical scheme provided by the invention, the circuit structure of ultrasound wave parking space detector comprises single-chip microcomputer, ultrasonic drive circuit, ultrasonic sensor, the amplification of reception signal and detecting circuit, gain control end, out-expander, input expander, oscillatory circuit, watchdog circuit, RS-422 communication circuit chip, drives indicating circuit, toggle switch and power circuit;
The input end of described ultrasonic drive circuit is connected with single-chip microcomputer, makes single-chip microcomputer send drive control signal, and output terminal is connected with ultrasonic sensor;
Described ultrasonic sensor amplifies and is connected with the input end of detecting circuit with described reception signal, receives echoed signal and amplifies, detects processing, receives signal amplification and is connected to single-chip microcomputer with the output terminal of detecting circuit;
Described gain control end is connected to one-chip machine port by out-expander, makes Single-chip Controlling signal gain, receives echo-pulse simultaneously and carries out data processing;
Described oscillatory circuit is connected with single-chip microcomputer corresponding port respectively with watchdog circuit, realizes the reliable normal work of single-chip microcomputer;
The TTL serial communication port of described RS-422 communication circuit chip is connected with single chip communication mouth, for communicating with region main control computer;
Described power circuit input end is connected with outside 24V direct supply, after filtering voltage regulation, is connected with each several part circuit power;
Described driving indicating circuit is connected with one-chip machine port by out-expander, realizes LED light indicating operating status;
Described input expander is used for connecting toggle switch, with parameters input single-chip microcomputer.
For detection of ultrasound wave parking space detector circuit be arranged on parking stall top and constantly send pulsed ultrasonic wave downwards, receive the ultrasonic pulse-echo of this below, parking stall simultaneously, MCU in detecting device is by calculating, can detect each parking stall has or not vehicle to take, by dual-colored LED, indicate this detecting device to communicate with computing machine, the information exchange that makes each parking stall take situation is crossed bus and is passed to Region control computing machine, by computing machine, by software, processed, the relevant demonstration of time update information display screen, to guide driver fast car to be stopped into room.
As a further improvement on the present invention, described ultrasonic drive circuit adopts ultrasonic sensor anodal anodal with the 8th diode, the 9th diode negative pole and the 20 electric capacity one end are connected, ultrasonic sensor negative pole connects power supply ground, the 8th diode negative pole, the 9th diode is anodal, the first diode is anodal to be connected with inductance transformer secondary winding, inductance transformer secondary winding other end ground connection, the negative pole of the first diode is connected with the collector of the second triode, the base stage of the second triode is connected to single-chip microcomputer by the 4th resistance, the grounded emitter of the second triode, the armature winding of inductance transformer and first electric capacity one end, the 3rd capacitance cathode, inductance one end is connected, the inductance other end is connected with filtered power supply, the armature winding of inductance transformer is connected with the drain electrode of the first electric capacity other end and metal-oxide-semiconductor the first triode, the minus earth of the 3rd electric capacity, the source electrode of the first triode, the tenth positive pole of diode and one end of the 21 resistance are connected and ground connection, the grid of the first triode and the tenth diode cathode, the 21 resistance other end, the 18 electric capacity one end is connected, the 18 electric capacity is connected to single-chip microcomputer after being connected with first resistance one end, the first resistance other end ground connection.
As a further improvement on the present invention, described reception signal amplification is connected with second electric capacity one end with the 20 electric capacity other end of detecting circuit, the second electric capacity other end is connected to the XIN end of the first chip, G1IN end and the 5th resistance of the first chip, one end of the 6th resistance is connected, the other end of the 5th resistance is connected with the XIN end of the first chip, the other end of the 6th resistance is connected with the GADJ end of the first chip, the LC end of the first chip and one end of the 19 electric capacity and the 6th electric capacity, one end of inductance is connected, the 19 electric capacity, the 6th electric capacity, the other end of inductance is connected with the VCC end of the first chip, the G1OUT end of the first chip is connected with the 21 electric capacity, the other end of the 21 electric capacity is connected with the G2IN end of the first chip, the BIAS end of the first chip is connected with one end of the 7th resistance, the 7th resistance other end ground connection, the REC end of the first chip and one end of the 7th electric capacity, the negative pole of voltage stabilizing diode is connected, the 7th electric capacity other end ground connection, voltage stabilizing diode positive pole is connected with the base stage of the 5th triode, the collector of the 5th triode connects single-chip microcomputer, the 5th transistor emitter ground connection, the GND end ground connection of the first chip.
As a further improvement on the present invention, in described oscillatory circuit and watchdog circuit, the RST of single-chip microcomputer end is held with the RESET of four-core sheet, one end of the 8th electric capacity is connected, the GND termination power of the 8th electric capacity other end and four-core sheet, the CLK end of four-core sheet is connected with the 9th resistance one end, the 9th resistance other end is connected with single-chip microcomputer, the VCC end of four-core sheet is connected with power supply, the VS end of four-core sheet is connected with the positive pole of the 11 electric capacity, the 11 electric capacity minus earth, the XTAL2 end of single-chip microcomputer and one end of crystal oscillator, one end of the 9th electric capacity is connected, the XTAL1 end of single-chip microcomputer and the other end of crystal oscillator, one end of the tenth electric capacity is connected, the 9th electric capacity, ground connection after the other end of the tenth electric capacity is connected.
As a further improvement on the present invention, the direct supply of described power circuit input is connected with the second diode cathode, the second diode cathode is connected with resettable fuse one end, the resettable fuse other end is connected with the Vin end that transient state suppresses the negative pole of the 3rd diode, the positive pole of the 5th electric capacity and integrated voltage-stabilized chip, positive pole and the power supply of Vout termination the 4th electric capacity of integrated voltage-stabilized chip, connect power supply after the GND end of the 4th electric capacity, the 5th electric capacity negative pole and chip and the 3rd diode cathode are connected.
As a further improvement on the present invention, described out-expander is connected with single-chip microcomputer with driving indicating circuit the 5th chip, the 5th chip is connected with one end of the 8th resistance, the 8th resistance other end is connected with the 3rd transistor base, the 3rd transistor collector is connected with one end of the 18 resistance, the 18 other end is connected with the red LED negative pole of red and green luminous diode, the public anode end of red and green luminous diode is connected with the emitter of the 6th triode, the collector of the 6th triode is connected with power supply, the 6th transistor base is connected with the 22 resistance one end, the 22 resistance other end is connected with the 5th chip, the 5th chip is connected with one end of the 13 resistance, the 13 resistance other end is connected with the 4th transistor base, the 4th transistor emitter and the 3rd transistor emitter, resettable fuse one end is connected, resettable fuse other end ground connection, the 4th transistor collector is connected with the 19 resistance one end, the 19 resistance other end is connected with the green LED negative pole of red and green luminous diode.
Compared with the prior art the present invention has the following advantages:
This ultrasound wave parking space detector of the present invention has:
1, transmitting/receiving is integrated, 1CM detection accuracy, investigative range 50cm～6 meter;
2, DIP toggle switch, in order to detector address to be set, to detect the parameters such as distance, detects distance multistage adjustable;
3, intelligent digital detecting pattern, guarantees between adjacent detector noiseless;
4, dual-colored LED lamp indication parking stall takies situation;
5, RS422 communication interface, 115.2Kbps, 8 bit strip address communications, efficiency is high, and speed is fast;
6, the unified cable interface that adopts, convenient installation;
7, subregion system, during the system failure, each region can islet operation, to improve system availability;
8, small and exquisite appearance design, installation of ceiling, facilitates engineering construction, maintenance.
Accompanying drawing explanation
Fig. 1 is the frame principle figure of ultrasound wave parking space detector of the present invention.
Fig. 2 is ultrasonic drive circuit structure principle chart of the present invention.
Fig. 3 is that reception signal of the present invention amplifies and detecting circuit structure principle chart.
Fig. 4 is oscillatory circuit and the watchdog circuit structure principle chart of single-chip microcomputer of the present invention.
Fig. 5 is RS422 communication circuit chip structure principle chart of the present invention.
Fig. 6 is circuit construction of electric power schematic diagram of the present invention.
Fig. 7 is input/output expander of the present invention and drives indicating circuit structure principle chart.
Fig. 8 is that input expander of the present invention and parameter arrange toggle switch circuit structure schematic diagram.
Embodiment
Below in conjunction with concrete drawings and Examples, the invention will be further described.
As shown in Fig. 1: effectively detect in order to use ultrasound wave to take situation to parking stall, the present invention includes for detection of ultrasonic sensor driving circuit, the input end of described driving circuit is connected with single-chip microcomputer, make single-chip microcomputer send drive control signal, output terminal is connected with ultrasonic sensor; Ultrasonic sensor also amplifies and is connected with the input end of detecting circuit with described reception signal, receive echoed signal and amplify, detect processing, receive signal amplification and be connected to single-chip microcomputer with the output terminal of detecting circuit, its gain control end is connected to one-chip machine port by out-expander, make Single-chip Controlling signal gain, receive echo-pulse simultaneously and carry out data processing; Described oscillatory circuit is connected with single-chip microcomputer corresponding port with watchdog circuit, realizes the reliable normal work of single-chip microcomputer; The TTL serial communication port of described RS-422 telecommunication circuit is connected with single chip communication mouth, for communicating with region main control computer; Described power circuit input end is connected with outside 24V direct current, after filtering voltage regulation, is connected with each several part circuit power; Described driving indicating circuit is connected with one-chip machine port by out-expander, realizes LED light indicating operating status; Described input expander is used for connecting toggle switch, with parameters input single-chip microcomputer.
The present invention for detection of ultrasound wave parking space detector be located at parking stall top and constantly send pulsed ultrasonic wave downwards, receive the ultrasonic pulse-echo of this below, parking stall simultaneously, MCU in detecting device is by calculating, can detect each parking stall has or not vehicle to take, by dual-colored LED, indicate this detecting device to communicate with computing machine, the information exchange that makes each parking stall take situation is crossed bus and is passed to Region control computing machine, by computing machine, by software, processed, the relevant demonstration of time update information display screen, to guide driver fast car to be stopped into room;
As shown in Figure 2:
The ultrasonic transmission/reception integrative sensor of described driving circuit is anodal anodal with the 8th diode D8, the 9th diode D9 negative pole and CON1(the 20 capacitor C 20 one end) be connected, ultrasonic sensor negative pole meets power supply GND, the 8th diode D8 negative pole, the 9th diode D9 is anodal, the first diode D1 is anodal to be connected with 1 pin of inductance transformer secondary winding T1, the inductance transformer secondary winding T1 other end (Same Name of Ends, 3 pin) meet GND, the negative pole of the first diode D1 is connected with the collector of the second triode Q2, the base stage of the second triode Q2 is connected to the P3.4 pin (DAMP) of single-chip microcomputer (U3) by the 4th resistance R 4, the emitter of the second triode Q2 meets GND, 2 pin of the armature winding T1 of inductance transformer and first capacitor C 1 one end, the 3rd capacitor C 3 positive poles, inductance L 1 one end is connected, inductance L 1 other end is connected with filtered+24VDC power supply, armature winding T1 4 pin (Same Name of Ends) of inductance transformer are connected with the drain electrode of first capacitor C 1 other end and metal-oxide-semiconductor the first triode Q1, the negative pole of the 3rd capacitor C 3 meets GND, the source electrode of the first triode Q1, the tenth positive pole of diode D10 and one end of the 21 resistance R 21 are connected and meet GND, the grid of the first triode Q1 and the tenth diode D10 negative pole, the 21 resistance R 21 other ends, the 18 capacitor C 18 one end are connected, the 18 capacitor C 18 is connected to the P3.7 end of SPOUT(single-chip microcomputer after being connected with first resistance R 1 one end), first resistance R 1 another termination GND.
Described ultrasonic sensor driving circuit adopts metal-oxide-semiconductor P75N75 as switch drive pipe, and 24V direct current is after LC filtering, in parallel with C1 by inductance transformer T1 armature winding, then holds GND through D, the S of metal-oxide-semiconductor P75N75.When single-chip microcomputer generation 40KHz driving pulse is delivered to SPOUT end, P75N75 conducting when pulse high level, ends during low level, thereby with driving ultrasonic sensor, sends ultrasound wave at the secondary generation 40KHz high-voltage signal of transformer T1.The first diode D1 and the second triode Q2 eliminate repercussions circuit, and after pulse transmission finishes, single-chip microcomputer is held and made the second triode Q2 conducting by DAMP, consumes fast resonant energy, reaches the object of eliminating repercussions.
As shown in Figure 3:
Described reception signal amplification is connected with second capacitor C 2 one end with the 20 capacitor C 20 other ends of detecting circuit, second capacitor C 2 other ends are connected to the XIN end of the first chip, G1IN end and the 5th resistance R 5 of the first chip U1, one end of the 6th resistance R 6 is connected, the other end of the 5th resistance R 5 is connected with the XIN end of the first chip U1, the other end of the 6th resistance R 6 is connected with the GADJ end of the first chip U1, the LC end of the first chip U1 and one end of the 19 capacitor C 19 and the 6th capacitor C 6, one end of inductance L 2 is connected, the 19 capacitor C 19, the 6th capacitor C 6, the other end of inductance L 2 is connected with the VCC end of power supply+5V (VCC) and the first chip U1, the G1OUT end of the first chip U1 is connected with the 21 capacitor C 21, the other end of the 21 capacitor C 21 is connected with the G2IN of the first chip U1, the BIAS of the first chip U1 is connected with one end of the 7th resistance R 7, the 7th resistance R 7 another termination GND, the REC end of the first chip U1 and one end of the 7th capacitor C 7, the negative pole of voltage stabilizing diode D11 is connected, the 7th capacitor C 7 another termination GND, voltage stabilizing diode D11 positive pole is connected with the base stage of the 5th triode Q5, the collector of the 5th triode Q5 connects the P3.2 end of ECHO(single-chip microcomputer), the 5th triode Q5 emitter meets GND, the GCC of the first chip U1, GCB, GCA, GCD end meets respectively GCC, GCB, GCA, GCD, the GND of the first chip U1 meets power supply GND.
Described reception signal amplifies and detecting circuit employing ultrasound wave reception signal processing chip TL852, ultrasonic echo signal is connected to TL852 input end XIN through the 20 capacitor C 20, the second capacitor C 2, via inside, amplify, after inductance L the 2, the 19 capacitor C 19, the 6th capacitor C 6 frequency-selecting being processed by chip, at REC end output echo-pulse, through the 11 diode D11 rear drive the 5th triode Q5 output low level.
As shown in Figure 4:
In described oscillatory circuit and watchdog circuit, the RST of single-chip microcomputer U3 end is held with the RESET of four-core sheet U4, one end of the 8th capacitor C 8 is connected, the GND termination power GND of the 8th capacitor C 8 other ends and four-core sheet U4, the CLK end of four-core sheet U4 is connected with the 9th resistance R 9 one end, the 9th resistance R 9 other ends are connected with the P3.5 end (WTHDOG) of single-chip microcomputer U3, the VCC end of four-core sheet U4 is connected with+5V power supply (VCC), the VS end of four-core sheet U4 is connected with the positive pole of the 11 capacitor C 11, the 11 capacitor C 11 negative poles meet GND, the XTAL2 end of single-chip microcomputer U3 and one end of crystal oscillator Y1, one end of the 9th capacitor C 9 is connected, the XTAL1 end of single-chip microcomputer U3 and the other end of crystal oscillator Y1, one end of the tenth capacitor C 10 is connected, the 9th capacitor C 9, the other end of the tenth capacitor C 10 meets GND after being connected.
Described oscillatory circuit and watchdog circuit comprise crystal oscillator Y1, watchdog chip NE56604.Crystal oscillator Y1, the 9th capacitor C 9, the tenth capacitor C 10 form the oscillatory circuit of single-chip microcomputer STC12C2052AD, and single-chip microcomputer is normally worked; NE56604, the 9th electric capacity R9, the 8th capacitor C the 8, the 11 capacitor C 11 form watchdog reset circuit, and when single-chip microcomputer occurs extremely not produce watchdog reset signal, watchdog circuit just produces reset enable signal monolithic processor resetting, recovers it and normally works.
As shown in Figure 5:
The RO end of described RS-422 communication circuit chip U8 is connected with the RXD end of single-chip microcomputer U3, RS-422 communication circuit chip U8 /RE end and GND meet power supply GND after holding and being connected, the DE end of RS-422 communication circuit chip U8 and one end of the 3rd resistance R 3, the P3.3 end (DE) of single-chip microcomputer U3 is connected, the 3rd resistance R 3 another termination GND, the DI end of RS-422 communication circuit chip U8 is connected with the TXD end of single-chip microcomputer U3, the Y end of RS-422 communication circuit chip U8 is connected with one end of the tenth resistance R 10, the tenth resistance R 10 other ends and the 7th diode D7 negative pole, the 16 resistance R 16 one end are connected, the 16 resistance R 16 another termination TXD+L, the Z end of RS-422 communication circuit chip U8 is connected with one end of the 20 resistance R 20, the negative pole of the other end of the 20 resistance R 20 and the 6th diode D6, one end of the 17 resistance R 17 is connected, the 17 resistance R 17 another termination TXD-L, B end and the 5th diode D5 negative pole of RS-422 communication circuit chip U8, one end of the 15 resistance R 15 is connected, the 15 resistance R 15 another termination RXD-L, A end and the 4th diode D4 negative pole of RS-422 communication circuit chip U8, one end of the 14 resistance R 14 is connected, the 14 resistance R 14 another termination RXD+L, the 4th diode D4, the 5th diode D5, the 6th diode D6, the positive pole of the 7th diode D7 meets GND, the VCC end of RS-422 communication circuit chip U8 is connected with power supply VCC.
Described RS-422 communication circuit chip adopts MAX489 communication chip, and RO connects the RXD end of single-chip microcomputer, and the first diode DI connects single-chip microcomputer TXD end, RE termination GND receives for allowing all the time, whether DE connects the 3rd resistance R 3 to GND, and is connected to one-chip machine port, in order to control, send.Other resistance and diode are holding circuit, protection chip communication port.RS-422 telecommunication circuit provides between single-chip microcomputer and regional host computer can carry out proper communication in longer distance range.
As shown in Figure 6:
Input+24V direct supply (+24VDCP) of described power circuit is connected with the second diode D2 is anodal, the second diode D2 negative pole is connected with resettable fuse R2 one end, the resettable fuse R2 other end suppresses the negative pole of the 3rd diode D3 with transient state, the Vin of the positive pole of the 5th capacitor C 5 ,+24VDC and integrated voltage-stabilized chip U2 end is connected, positive pole and the VCC(power supply+5VDC of Vout termination the 4th capacitor C 4 of integrated voltage-stabilized chip U2), after being connected, the GND end of the 4th capacitor C 4, the 5th capacitor C 5 negative poles and chip U2 and the 3rd diode D3 positive pole meet power supply GND.
Described power circuit comprises that diode D2, resettable fuse R2, transient state suppress the 3rd diode D3, the 4th filter capacitor C4, the 5th filter capacitor C5 and three end integrated voltage stabilizer K7805-500 etc.Be mainly circuit reliable and stable 24V direct current and 5V direct supply is provided.
As shown in Figure 7:
Described out-expander is held with the P1.6 end (SDODATA) of single-chip microcomputer U3 and is connected with the SER that drives indicating circuit the 5th chip U5, the SRCLK end of the 5th chip U5 is connected with the P1.5 end (SDOCLK) of single-chip microcomputer U3, the RCLK end of the 5th chip U5 is connected with the P1.4 end (SDOLATCH) of single-chip microcomputer U3, the 5th chip U5 /SRCLR end is connected with power supply VCC, the E termination GND of the 5th chip U5, the O0 of the 5th chip U5, O1, O2, O3 end respectively with the GCA of the first chip U1, GCB, GCC, GCD end is connected, the O5 end of the 5th chip U5 is connected with one end of the 8th resistance R 8, the 8th resistance R 8 other ends are connected with the 3rd triode Q3 base stage, the 3rd triode Q3 collector and/REDLED, one end of the 18 resistance R 18 is connected, the 18 R18 other end is connected with the red LED negative pole (KR end) of red and green luminous diode DD1, the public anode end of red and green luminous diode DD1 (A end) is connected with the emitter of the 6th triode Q6, the collector of the 6th triode Q6 is connected with+24VDC, the 6th triode Q6 base stage is connected with the 22 resistance R 22 one end, the 22 resistance R 22 other ends are connected with the O7 end (DETECT-LED) of the 5th chip U5, the O6 end of the 5th chip U5 is connected with one end of the 13 resistance R 13, the 13 resistance R 13 other ends are connected with the 4th triode Q4 base stage, the 4th triode Q4 emitter and the 3rd triode Q3 emitter, resettable fuse R23 one end is connected, another termination of resettable fuse R23 GND, the 4th triode Q4 collector and/GREENLED, the 19 resistance R 19 one end are connected, the 19 resistance R 19 other ends are connected with the green LED negative pole (KG end) of red and green luminous diode DD1, the VCC of the 5th chip U5 and GND end meet respectively power supply VCC and GND.
Described input/output expander and driving indicating circuit adopt chip 74HC595 to expand as delivery outlet, chip CD4021 expands as input port, adopts three C1008 the 3rd triode Q3, the 4th triode Q4, the 6th triode Q6 as the driving tube of LED light.Toggle switch is used for arranging slave addresses, packet numbering, threshold values distance parameter.When single-chip microcomputer captures after echo-pulse, calculate distance according to the time detecting and the velocity of sound, then judged whether that according to the distance threshold values of high 4 settings of toggle switch S3 vehicle takies.If detected distance is greater than the distance threshold values of setting, represent that parking stall is empty, green LED is bright; Otherwise, representing that parking stall takies, red LED is bright.
As shown in Figure 8
Described input expander and parameter arrange the P1 of the 6th chip U6 of toggle switch circuit ~ P8 end respectively with 1 ~ 8 pin of the second toggle switch S2, 9 ~ 2 pin of the 11 exclusion R11 are connected, be incorporated to go here and there out the P1 of the 7th chip U7 ~ P8 end respectively with 1 ~ 8 pin of the 3rd toggle switch S3, 9 ~ 2 pin of the 12 exclusion R12 are connected, the second toggle switch S2, 9 ~ 16 pin of the 3rd toggle switch S3 meet GND after being connected, the 11 exclusion R11, 1 pin of the 12 exclusion R12 all meets VCC, the P/S end of the 6th chip U6 connects the P1.0 end of SDILATCH(single-chip microcomputer U3 after being connected with the P/S end of the 7th chip U7), the CLK end of the 6th chip U6 connects the P1.1 end of SDICLK(single-chip microcomputer U3 after being connected with the CLK end of the 7th chip U7), the 8th triode Q8 end of the 6th chip U6 is connected with the DS end of the 7th chip U7, the DS termination GND of the 6th chip U6, the P1.2 end of the 8th triode Q8 termination SDIDATA(single-chip microcomputer U3 of the 7th chip U7), the 6th chip U6, the VCC termination power VCC of the 7th chip U7, the 6th chip U6, the GND termination power GND of the 7th chip U7.
As shown in Fig. 1～Fig. 8: during use, ultrasound wave parking space detector should connect power lead and order wire, sets correlation parameter with toggle switch.During work, single-chip microcomputer is received after the detection instruction of main frame, single-chip microcomputer P3.7 mouth produces the grid that N 40KHz driving pulse delivered to metal-oxide-semiconductor Q1, makes Q1 conducting and cut-off, thereby with driving ultrasonic sensor, sends ultrasound wave at the high-voltage signal of the secondary generation alternation of transformer T1.The first diode D1 and the 3rd triode Q2 eliminate repercussions circuit, and after pulse transmission finishes, single-chip microcomputer makes Q2 conducting by P3.4 pin, consumes fast resonant energy, reaches the object of eliminating repercussions.After ultrasound wave sends, single-chip microcomputer just starts timing, regulates in time the ride gain of the first chip U1 simultaneously.Ultrasonic sensor is received after echo, amplitude limit effect due to the 8th diode D8, the 9th diode D9, make faint echoed signal via the 20 capacitor C 20, the 2nd C2, enter the XIN end of the first chip U1, through signal, amplify and detecting circuit, at REC end output echo-pulse, through the 11 electric capacity D11 rear drive the 5th triode Q5 output low level.Single-chip microcomputer captures after echoed signal, just can calculate distance according to the time detecting and the velocity of sound, thereby according to the distance threshold values of high 4 settings of toggle switch S3, judged whether that vehicle takies again, and by the 3rd triode Q3, the 4th triode Q4, the bright different color of the 6th triode Q6 driving LED lamp, indicated the situation that takies of parking stall.If detected distance is greater than the distance threshold values of setting, represent that parking stall is empty, green LED is bright; Otherwise, representing that parking stall takies, red LED is bright.
The present invention adopts transmitting/receiving integrative ultrasonic wave sensor, and detection accuracy is high, detection distance, and use cost is low; Intelligent digital detects, and highly sensitive, antijamming capability is strong; RS422 communications distance; Subregion system, each region can islet operation, to improve system availability; The unified cable interface that adopts, convenient installation, safe and reliable.
The present invention utilizes ultrasound wave parking space detector above parking stall, constantly to send pulsed ultrasonic wave downwards, receive the ultrasonic pulse-echo of this below, parking stall simultaneously, MCU in detecting device, by calculating, can detect each parking stall and have or not vehicle to take, and by dual-colored LED, indicates.This detecting device can communicate with computing machine, the information exchange that makes each parking stall take situation is crossed bus and is passed to Region control computing machine, by computing machine, by software, processed, the relevant demonstration of time update information display screen, to guide driver fast car to be stopped into room.
Claims (5)
1. a circuit structure for ultrasound wave parking space detector, comprises single-chip microcomputer, ultrasonic drive circuit, ultrasonic sensor, the amplification of reception signal and detecting circuit, gain control end, out-expander, RS-422 communication circuit chip, drives indicating circuit and power circuit;
The input end of described ultrasonic drive circuit is connected with single-chip microcomputer, makes single-chip microcomputer send drive control signal, and output terminal is connected with ultrasonic sensor;
Described ultrasonic sensor amplifies and is connected with the input end of detecting circuit with described reception signal, receives echoed signal and amplifies, detects processing, receives signal amplification and is connected to single-chip microcomputer with the output terminal of detecting circuit;
Described gain control end is connected to one-chip machine port by out-expander, makes Single-chip Controlling signal gain, receives echo-pulse simultaneously and carries out data processing;
Described power circuit input end is connected with outside 24V direct current, after filtering voltage regulation, is connected with each several part circuit power;
Described driving indicating circuit is connected with one-chip machine port by out-expander, realizes LED light indicating operating status;
The circuit of described ultrasound wave parking space detector is arranged on top, parking stall and constantly sends pulsed ultrasonic wave downwards, receive the ultrasonic pulse-echo of this below, parking stall simultaneously, MCU in detecting device is by calculating, can detect each parking stall has or not vehicle to take, by dual-colored LED, indicate this detecting device and computing machine to communicate, the information exchange that makes each parking stall take situation is crossed bus and is passed to Region control computing machine;
It is characterized in that: also comprise input expander, oscillatory circuit, watchdog circuit and toggle switch;
Described oscillatory circuit is connected with single-chip microcomputer corresponding port respectively with watchdog circuit, realizes the reliable normal work of single-chip microcomputer;
The TTL serial communication port of described RS-422 communication circuit chip is connected with single chip communication mouth, for communicating with region main control computer; Described input expander is used for connecting toggle switch, with parameters input single-chip microcomputer;
By computing machine, by software, processed, the relevant demonstration of time update information display screen, to guide driver fast car to be stopped into room;
Described ultrasonic drive circuit adopts ultrasonic sensor positive pole and the 8th diode (D8) positive pole, the 9th diode (D9) negative pole and receiving terminal are connected, ultrasonic sensor negative pole connects power supply, the 8th diode (D8) negative pole, the 9th diode (D9) positive pole, the first diode (D1) is anodal to be connected with 1 pin of inductance transformer secondary winding (T1), 3 pin ground connection of inductance transformer secondary winding (T1) other end, the negative pole of the first diode (D1) is connected with the collector of the second triode (Q2), the base stage of the second triode (Q2) is connected to the P3.4 pin (DAMP) of single-chip microcomputer U3 by the 4th resistance (R4), the model of single-chip microcomputer U3 adopts STC12C2052AD, the grounded emitter of the second triode (Q2), 2 pin of the armature winding of inductance transformer (T1) and the first electric capacity (C1) one end, the 3rd electric capacity (C3) positive pole, inductance (L1) one end is connected, inductance (L1) other end is connected with filtered power supply, 4 pin of the armature winding of inductance transformer (T1) are connected with the drain electrode of the first electric capacity (C1) other end and metal-oxide-semiconductor the first triode (Q1), the minus earth of the 3rd electric capacity (C3), the source electrode of the first triode (Q1), the tenth positive pole of diode (D10) and one end of the 21 resistance (R21) are connected and ground connection, the grid of the first triode (Q1) and the tenth diode (D10) negative pole, the 21 resistance (R21) other end, the 18 electric capacity (C18) one end is connected, the 18 electric capacity (C18) is connected to single-chip microcomputer after being connected with the first resistance (R1) one end, the first resistance (R1) other end ground connection.
2. the circuit structure of ultrasound wave parking space detector as claimed in claim 1, is characterized in that: described in
Receiving signal amplifies with the 20 electric capacity (C20) one end of detecting circuit by (XIN) end of the 20 electric capacity (C20) and the second electric capacity (C2) series connection to the first chip U1, the model of the first chip U1 adopts ultrasound wave to receive signal processing chip TL852, (G1IN) end and the 5th resistance (R5) of the first chip U1, one end of the 6th resistance (R6) is connected, the other end of the 5th resistance (R5) is connected with (XIN) end of the first chip U1, the other end of the 6th resistance (R6) is connected with (GADJ) end of the first chip U1, (LC) end of the first chip U1 and one end of the 19 electric capacity (C19) and the 6th electric capacity (C6), one end of inductance (L2) is connected, the 19 electric capacity (C19), the 6th electric capacity (C6), the other end of inductance (L2) is connected with (VCC) end of the first chip U1, (G1OUT) end of the first chip U1 is connected with the 21 electric capacity (C21), the other end of the 21 electric capacity (C21) is connected with (G2IN) end of the first chip U1, (BIAS) end of the first chip U1 is connected with one end of the 7th resistance (R7), the 7th resistance (R7) other end ground connection, (REC) end of the first chip U1 and one end of the 7th electric capacity (C7), the negative pole of voltage stabilizing diode (D11) is connected, the 7th electric capacity (C7) other end ground connection, voltage stabilizing diode (D11) is anodal to be connected with the base stage of the 5th triode (Q5), the collector of the 5th triode (Q5) connects single-chip microcomputer, the 5th triode (Q5) grounded emitter, (GND) termination power of the first chip U1.
3. the circuit structure of ultrasound wave parking space detector as claimed in claim 1, it is characterized in that: (RST) end of described oscillatory circuit and single-chip microcomputer U3 in watchdog circuit is connected with (RESET) end of four-core sheet U4, one end of the 8th electric capacity (C8), (GND) termination power of the 8th electric capacity (C8) other end and four-core sheet U4, the model of described single-chip microcomputer U3 adopts STC12C2052AD, the model of four-core sheet U4 adopts NE56604, (CLK) end of four-core sheet U4 is connected with the 9th resistance (R9) one end, the 9th resistance (R9) other end is connected with the P3.5 end of single-chip microcomputer U3, (VCC) end of four-core sheet U4 is connected with power supply, (VS) end of four-core sheet U4 is connected with the positive pole of the 11 electric capacity (C11), the 11 electric capacity (C11) minus earth, (XTAL2) end of single-chip microcomputer U3 and one end of crystal oscillator (Y1), one end of the 9th electric capacity (C9) is connected, (XTAL1) end of single-chip microcomputer U3 and the other end of crystal oscillator (Y1), one end of the tenth electric capacity (C10) is connected, the 9th electric capacity (C9), ground connection after the other end of the tenth electric capacity (C10) is connected.
4. the circuit structure of ultrasound wave parking space detector as claimed in claim 1, is characterized in that: described in
The direct supply of power circuit input is connected with the second diode (D2) is anodal, the second diode (D2) negative pole is connected with resettable fuse (R2) one end, resettable fuse (R2) other end suppresses the negative pole of the 3rd diode (D3) with transient state, (Vin) end of the positive pole of the 5th electric capacity (C5) ,+24VDC and integrated voltage-stabilized chip U2 is connected, and the model of described integrated voltage-stabilized chip U2 adopts K7805-500; Positive pole and the power supply of (Vout) termination the 4th electric capacity (C4) of integrated voltage-stabilized chip U2, connect power supply after (GND) end of the 4th electric capacity (C4), the 5th electric capacity (C5) negative pole and integrated voltage-stabilized chip U2 and the 3rd diode (D3) positive pole are connected.
5. the circuit structure of ultrasound wave parking space detector as claimed in claim 1, it is characterized in that: described out-expander is held with the P1.6 end (SDODATA) of single-chip microcomputer U3 and is connected with (SER) that drive indicating circuit the 5th chip U5, and the model of the 5th chip U5 adopts 74HC595, the model of single-chip microcomputer U3 adopts STC12C2052AD, (O5) end of the 5th chip U5 is connected with one end of the 8th resistance (R8), the 8th resistance (R8) other end is connected with the 3rd triode (Q3) base stage, output terminal/the REDLED of the 3rd triode (Q3) collector and red LED, one end of the 18 resistance (R18) is connected, the 18 (R18) other end is connected with the red LED negative pole (KR end) of red and green luminous diode (DD1), the public anode end of red and green luminous diode (DD1) (A end) is connected with the emitter of the 6th triode (Q6), the collector of the 6th triode (Q6) and+24(VDC) be connected, the 6th triode (Q6) base stage is connected with the 22 resistance (R22) one end, the 22 resistance (R22) other end is connected with (O7) end of the 5th chip U5, (O6) end of the 5th chip U5 is connected with one end of the 13 resistance (R13), the 13 resistance (R13) other end is connected with the 4th triode (Q4) base stage, the 4th triode (Q4) emitter and the 3rd triode (Q3) emitter, resettable fuse (R23) one end is connected, resettable fuse (R23) other end ground connection, output terminal/the GREENLED of the 4th triode (Q4) collector and green LED, the 19 resistance (R19) one end is connected, the 19 resistance (R19) other end is connected with the green LED negative pole (KG end) of red and green luminous diode (DD1).
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
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| CN107067809A (en) * | 2017-05-22 | 2017-08-18 | 西安天济网络科技有限公司 | A kind of smart city cloud computing parking management information system |
| CN108271295A (en) * | 2018-01-31 | 2018-07-10 | 四川驿停车智慧科技有限公司 | A kind of parking energy efficient lighting system |
| CN110703235B (en) * | 2019-10-29 | 2022-08-23 | 南京俊禄科技有限公司 | Ultrasonic measuring system |
| CN111308933B (en) * | 2020-02-25 | 2021-11-05 | 广东省智能制造研究所 | Internet of things data acquisition system based on FPGA |
| CN113554383A (en) * | 2021-03-04 | 2021-10-26 | 江苏安方电力科技有限公司 | Method and system for distributing bin positions of electric power materials |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201107408Y (en) * | 2007-11-26 | 2008-08-27 | 武光杰 | Ultrasonic induction module |
| CN201590167U (en) * | 2009-09-16 | 2010-09-22 | 北京国人正方科技有限公司 | Ultrasonic parking lot detection device |
| CN201590162U (en) * | 2009-12-25 | 2010-09-22 | 东莞市帕马智能停车服务有限公司 | Vehicle detector circuit |
| CN202454091U (en) * | 2011-12-29 | 2012-09-26 | 中国船舶重工集团公司第七一○研究所 | Parking space detection device |
| CN202904899U (en) * | 2012-11-01 | 2013-04-24 | 江苏大为科技股份有限公司 | Circuit structure of ultrasonic parking spot detector |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100281670B1 (en) * | 1997-12-31 | 2001-02-15 | 김헌출 | Communication Method Using Ultrasonic Sensor of Parking Guidance System |
-
2012
- 2012-11-01 CN CN201210433785.2A patent/CN102930742B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201107408Y (en) * | 2007-11-26 | 2008-08-27 | 武光杰 | Ultrasonic induction module |
| CN201590167U (en) * | 2009-09-16 | 2010-09-22 | 北京国人正方科技有限公司 | Ultrasonic parking lot detection device |
| CN201590162U (en) * | 2009-12-25 | 2010-09-22 | 东莞市帕马智能停车服务有限公司 | Vehicle detector circuit |
| CN202454091U (en) * | 2011-12-29 | 2012-09-26 | 中国船舶重工集团公司第七一○研究所 | Parking space detection device |
| CN202904899U (en) * | 2012-11-01 | 2013-04-24 | 江苏大为科技股份有限公司 | Circuit structure of ultrasonic parking spot detector |
Non-Patent Citations (1)
| Title |
|---|
| 高旭东，曹珊珊.超声波车位检测器***设计.《黑龙江科技信息》.2008,(第3期),第31、第195页. * |
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