CN103646501B

CN103646501B - Early warning system in car is set to based on pressure sensing child

Info

Publication number: CN103646501B
Application number: CN201310687931.9A
Authority: CN
Inventors: 王军年; 周君为; 陈思吉; 王鹤鸣; 佘远昇; 国新鹏
Original assignee: Jilin University
Current assignee: Jilin University
Priority date: 2013-12-16
Filing date: 2013-12-16
Publication date: 2015-10-07
Anticipated expiration: 2033-12-16
Also published as: CN103646501A

Abstract

The invention discloses one and be set to early warning system in car based on pressure sensing child, be intended to overcome the problem only paid attention to detecting and think little of reporting to the police, it comprises system enable detection unit, child is set to detecting unit in car, ECU (Electrical Control Unit) and performance element.+ 5V output terminal and No. 1 to No. 3 model of ECU (Electrical Control Unit) power module are the modulus conversion chip U1 of TCL2543, model is the modulus conversion chip U7 of ADC0832 and being connected by control system of relay U12, and relay U12 is connected with the pin VCC of single-chip microcomputer by the control system other end; System enable detection unit is connected with the system input that controlled of relay U12; Child is set to detecting unit in car and is connected with single-chip microcomputer by the modulus conversion chip U7 that No. 2 is ADC0832 with No. 3 signal amplification circuits and model, performance element is connected with single-chip microcomputer by No. 4 signal amplification circuits, and performance element is connected with single-chip microcomputer by No. 5 signal amplification circuits.

Description

Early warning system in car is set to based on pressure sensing child

Technical field

The present invention relates to a kind of prior-warning device be applied on automobile, or rather, the present invention relates to one and be set to early warning system in car based on pressure sensing child.

Background technology

Along with automobile industry develops rapidly, recoverable amount and the utilization rate of automobile raise day by day, and the research for the safety in automobile and humanizing system is also more and more subject to people and payes attention to.Often have in recent years and children are passed into silence in car, cause the thing of its death by suffocation to occur because head of a family's carelessness, and the children that pass into silence in school bus suffocate or the case of being poisoned to death also is of common occurrence.

Collected at present the suffocate domestic patent of invention of pre-alarming safety device of children in car as follows, but it focuses on the transmission of distress signal, the detection of children being shelved separately to situation can not effectively judge.As

1. Chinese patent notification number is CN202268054, and the day for announcing is on June 6th, 2012, and invention and created name is " a kind of vehicle alarming reminder for children ", and the patent No. is CN201120346745.5, the artificial Zhou Zhenhai of application (patent right).

2. Chinese patent notification number is CN102572156; the day for announcing is on July 11st, 2012; invention and created name is " child alert onboard system and method based on wireless sensor network "; Application Number (patent) is CN201210007366.2; application (patent right) people is Nanjing Aero-Space University, and invention (design) people is Cao Xiulan; Wu Jie; Tian Yupeng.

Its core of patent that invention and created name is " a kind of vehicle alarming reminder for children " is wireless security security protection electronic technology, comprises at least one radiating portion and at least one receiving unit.Radiating portion is connected by wireless transmission method with receiving unit, is received after emitter provides and transmits through process by receiving trap again.After receiving, judgment means compares the size of signal that receiving trap receives and prevalue, and whether decision reports to the police and provide alerting signal by alarm output device.This device emphasis, in warning reminding, is mainly used in children alarming prompting, article reminding etc. in automobile, does not introduce in detail for detection case.

The patent that invention and created name is " child alert onboard system and method based on wireless sensor network " is a kind of child alert onboard system based on wireless sensor network, comprises several vehicle-mounted child node module, aggregation node module and mobile phone terminal; Vehicle-mounted child node module is installed in the car, aggregation node module is arranged in garage or parking lot, described each vehicle-mounted child node module and aggregation node module adopt hub-and-spoke network topology mode to carry out networking, and utilize ZigBee technology to carry out radio communication and data transmission; Described aggregation node module utilizes GSM network that warning message is sent to mobile phone terminal with note form.Be that the patent of " a kind of vehicle alarming reminder for children " is the same with invention and created name, stress warning reminding, need in context of detection perfect.

Three students of Huai Ting engineering college of Johns Hopkins University of the U.S. (Johns Hopkins University Whiting School of Engineering) have designed a kind of device that can be set to child in inspection vehicle, but do not have the function providing alerting signal in time to car owner.CBS Television (CBS) also once released news on July 31st, 2012 and claims associating The Children's Hospital of Philadelphia of United States highways safety management office to be set to prior-warning device in car to the children sold on the market to have carried out sample survey.Investigation result shows 18 kinds of products and there is underproof phenomenon.In sensitivity, distant signal transmission, anti-tampering signal etc., there is obvious defect, perfect can not reach the object of children in protection car.

Summary of the invention

Technical matters to be solved by this invention overcomes prior art existence only to pay attention to detecting the problem thinking little of reporting to the police, and provides one and be set to early warning system in car based on pressure sensing child.

For solving the problems of the technologies described above, the present invention adopts following technical scheme to realize: described be set to early warning system in car based on pressure sensing child and be set to detecting unit in car, ECU (Electrical Control Unit) and performance element formed by system enable detection unit, child.

Modulus conversion chip U7, relay U12 that the modulus conversion chip U1 that described ECU (Electrical Control Unit) is TCL2543 by single-chip microcomputer, ECU (Electrical Control Unit) power module, model, model are ADC0832 form.

+ 5V output terminal and the model of ECU (Electrical Control Unit) power module are the port one 4 of the modulus conversion chip U1 of TCL2543 and port 20, model is that the input port 3 of the modulus conversion chip U7 of ADC0832 is connected with the system wires that controlled of relay U12, and relay U12 is connected with the pin VCC electric wire of single-chip microcomputer by the other end of control system.

Model is that the port CLK of the modulus conversion chip U7 of ADC0832 is connected with the pin P3.4 electric wire of single-chip microcomputer, and model is that the port DO of the modulus conversion chip U7 of ADC0832 pin P3.3 electric wire that is same with port DI and single-chip microcomputer is connected; Model is that the modulus conversion chip U1 of TCL2543 is connected with single-chip microcomputer electric wire.

The output terminal of system enable detection unit is connected with the control system electric wire of the relay U12 in ECU (Electrical Control Unit); It is that input port AIN0, input port AIN1 in the modulus conversion chip U1 of TCL2543 is connected with input port AIN2 electric wire that child is set to detecting unit in car by the output terminal of No. 1 signal amplification circuit and the model in ECU (Electrical Control Unit), and child is set to detecting unit in car and is connected by the analog input channel CH1 electric wire that the output terminal of No. 2 signal amplification circuits and model are the modulus conversion chip U7 of ADC0832; Performance element is connected with the pin P1.5 electric wire of the single-chip microcomputer in ECU (Electrical Control Unit) by the input end of No. 3 signal amplification circuits, performance element is connected with single-chip microcomputer pin P2.0, the pin P3.0 in ECU (Electrical Control Unit), pin P3.1, pin P2.1, pin P2.2 electric wire by the input end of No. 4 signal amplification circuits, and performance element is connected with the pin P2.3 electric wire of the single-chip microcomputer in ECU (Electrical Control Unit) by the input end of No. 5 signal amplification circuits.

Model described in technical scheme is the modulus conversion chip U1 that the modulus conversion chip U1 of TCL2543 comprises modulus conversion chip U1 that No. 1 model is TCL2543, No. 2 models are the modulus conversion chip U1 of TCL2543, No. 3 models are TCL2543.No. 1 model is that the port I/O CLOCK of the modulus conversion chip U1 of TCL2543 is connected with the pin P1.1 electric wire of the single-chip microcomputer in ECU (Electrical Control Unit), No. 1 model is that the port DATA INPUT of the modulus conversion chip U1 of TCL2543 is connected with the pin P1.2 electric wire of the single-chip microcomputer in ECU (Electrical Control Unit), and No. 1 model is that the port DATA OUT of the modulus conversion chip U1 of TCL2543 is connected with the pin P1.3 electric wire of single-chip microcomputer; No. 2 models are that the port I/O CLOCK of the modulus conversion chip U1 of TCL2543 is connected with the pin P0.1 electric wire of the single-chip microcomputer in ECU (Electrical Control Unit), No. 2 models are that the port DATA INPUT of the modulus conversion chip U1 of TCL2543 is connected with the pin P0.2 electric wire of the single-chip microcomputer in ECU (Electrical Control Unit), and model is that the port DATA OUT of No. 2 modulus conversion chip U1 of TCL2543 is connected with the pin P0.3 electric wire of single-chip microcomputer; No. 3 models are that the port I/O CLOCK of the modulus conversion chip U1 of TCL2543 is connected with the pin P0.5 electric wire of the single-chip microcomputer in ECU (Electrical Control Unit), No. 3 models are that the port DATA INPUT of the modulus conversion chip U1 of TCL2543 is connected with the pin P0.6 electric wire of the single-chip microcomputer in ECU (Electrical Control Unit), and No. 3 models are that the port DATA OUT of the modulus conversion chip U1 of TCL2543 is connected with the pin P0.7 electric wire of single-chip microcomputer.

ECU (Electrical Control Unit) power module described in technical scheme comprises switching mode voltage stabilizing chip U11, diode IN5822, electric capacity C15, C16, inductance L 1.The vehicle power electric wire that port Vin and the output valve of switching mode voltage stabilizing chip U11 are+12V is connected, the port OUTPUT of switching mode voltage stabilizing chip U11 is connected with diode IN5822 electric wire, be connected with one end electric wire of inductance L 1 simultaneously, the other end of diode IN5822 is connected also ground connection simultaneously with the negative pole end of electric capacity C16, the port GND of switching mode voltage stabilizing chip U11 is connected with the negative pole end electric wire of electric capacity C15 and simultaneously ground connection, positive terminal and the output valve of electric capacity C15 are that the vehicle power electric wire of+12V is connected, the port FEEDBACK of switching mode voltage stabilizing chip U11 with and the positive terminal of electric capacity C16, the other end electric wire of inductance L 1 is connected also as the output terminal of+5V voltage, the port ON/OFF ground connection of switching mode voltage stabilizing chip U11.

Child described in technical scheme is set to detecting unit in car and comprises 9 pressure transducer U3, No. 1 signal amplification circuit.The structure of 9 described pressure transducer U3 is identical, all adopts tekscan the sensor of Sensors A201, every 3 pressure transducer U3 be one group of shape triangular in shape be arranged on a seat of automobile rear dispersedly, 3 pressure transducer U3 of first group are called No. 1 pressure transducer U3, No. 2 pressure transducer U3, No. 3 pressure transducer U3; 2nd group is called No. 4 pressure transducer U3, No. 5 pressure transducer U3, No. 6 pressure transducer U3, No. 7 pressure transducer U3, No. 8 pressure transducer U3 and No. 9 pressure transducer U3 with 6 pressure transducer U3 of the 3rd group; No. 1 described signal amplification circuit by No. 1 pressure sensor circuit, No. 2 pressure sensor circuits, No. 3 pressure sensor circuit ... form with No. 9 pressure sensor circuits, No. 1 pressure sensor circuit, No. 2 pressure sensor circuits, No. 3 pressure sensor circuit ... identical with the structure of No. 9 pressure sensor circuits, all comprise transistor that model is MCP6004-E/P, charge pump U5, electric capacity C3, electric capacity C4 and electric capacity C5 that voltage stabilizing diode that variable resistor RF, model are IN4370, model are TPS60400; model is that the cathode voltage input port 2 of the transistor of MCP6004-E/P is connected with a port electric wire of No. 1 pressure transducer U3, model is that the cathode voltage input port 3 of the transistor of MCP6004-E/P is connected with earth terminal GND electric wire, model is that the cathode voltage input port 2 of the transistor of MCP6004-E/P is connected with one end electric wire of variable resistor RF, the other end and the model of variable resistor RF are that voltage output end mouth 1 electric wire of the transistor of MCP6004-E/P is connected, another port and the model of No. 1 pressure transducer U3 are that one end electric wire of the voltage stabilizing diode of IN4370 is connected, and output port 1 electric wire that the other end and model that model is the voltage stabilizing diode of IN4370 are the charge pump U5 of TPS60400 is connected, be connected with the positive terminal electric wire of the electric capacity C3 of one end ground connection simultaneously, model is that the direct supply electric wire that input port 2 and the output valve of the charge pump U5 of TPS60400 is 5V is connected, be connected with the positive terminal electric wire of the electric capacity C4 of one end ground connection simultaneously, model is that the port 4 of the charge pump U5 of TPS60400 is connected with earth terminal GND electric wire, model is that the port 5 of the charge pump U5 of TPS60400 is connected with self port 3 electric wire after electric capacity C5, model is that the input port AIN0 electric wire that voltage output end mouth 1 and No. 1 model of the transistor of MCP6004-E/P is the modulus conversion chip U1 of TCL2543 is connected, namely No. 1 pressure sensor circuit is formed, No. 2 pressure sensor circuits, No. 3 pressure sensor circuits and the 2nd group and No. 4 pressure sensor circuits of the 3rd group, No. 5 pressure sensor circuits, No. 6 pressure sensor circuits and No. 7 pressure sensor circuits, No. 8 pressure sensor circuits, No. 9 pressure sensor circuits are connected into respectively by above-mentioned the same manner.

Child described in technical scheme is set to detecting unit in car and also comprises Thermoelectric Infrared Sensor U8 and No. 2 signal amplification circuit.No. 2 signal amplification circuits comprise NPN triode Q3, resistance R3, resistance R4, electric capacity C6, the electric capacity C7 that model is s8050.Input port 3 and the output valve of Thermoelectric Infrared Sensor U8 are that the direct supply VCC electric wire of 5V is connected, the base stage electric wire that the input port 2 of Thermoelectric Infrared Sensor U8 is the NPN triode Q3 of s8050 with one end of resistance R4 and model through electric capacity C7 while is connected, the other end of resistance R4 is that the direct supply VCC of 5V is connected with one end electric wire of resistance R3 with output valve simultaneously, and the analog input channel CH1 electric wire that the other end of resistance R3 is the modulus conversion chip U7 of ADC0832 through electric capacity C6 and the model in ECU (Electrical Control Unit) is connected; Model is that the collector electric wire of the NPN triode Q3 of s8050 is connected between resistance R3 and electric capacity C6, and model is that the emitter of the NPN triode Q3 of s8050 is connected with earth terminal GND electric wire.

Described in technical scheme No. 3 signal amplification circuit comprises NPN triode Q1, the resistance R1 that model is s8050.Model is the grounded emitter of the NPN triode Q1 of s8050, model is that the base stage of NPN triode Q1 of s8050 is connected with one end electric wire of resistance R1, the other end of resistance R1 is connected with the pin P1.5 electric wire of the single-chip microcomputer in ECU (Electrical Control Unit), model is that the collector of NPN triode Q1 of s8050 is connected with one end electric wire of hummer U4, and the other end of hummer U4 is connected with the positive electrical wire of 5V direct supply.

Described in technical scheme No. 4 signal amplification circuit comprises the NPN triode Q4 that model is s8050, resistance R5, resistance R6, resistance R7, resistance R8, resistance R9, resistance R10, resistance R11, resistance R12, resistance R13, electric capacity C8, electric capacity C9, electric capacity C10, electric capacity C11, electric capacity C12, electric capacity C13, electric capacity C14, LED 1.Model is the pin 1 of the dialer module U9 of TC35i, pin 2, pin 3, pin 4, the pin 5 electrochemical capacitor C8 afterwards together and after parallel connection in parallel, electrochemical capacitor C9, electrochemical capacitor C10, electrochemical capacitor C11, electrochemical capacitor C12, the positive electrical wire of electrochemical capacitor C13 connects, electrochemical capacitor C8, electrochemical capacitor C9, electrochemical capacitor C10, electrochemical capacitor C11, electrochemical capacitor C12, the negative electrical wire of electrochemical capacitor C13 connects, the negative pole end ground connection of electric capacity C13, be connected with one end electric wire of resistance R5 as the positive terminal of electrochemical capacitor group simultaneously, the other end and the output valve of resistance R5 are that the direct supply VCC electric wire of 5V is connected, model is the pin 6 of the dialer module U9 of TC35i, pin 7, pin 8, pin 9, be connected and ground connection with the negative pole end electric wire of electric capacity C13 after pin 10 is in parallel, model is that the pin 15 of the dialer module U9 of TC35i is connected with one end electric wire of resistance R6 and resistance R9 simultaneously, resistance R9 other end ground connection, model is that the pin 19 of the dialer module U9 of TC35i is connected with resistance R10 with resistance R7 simultaneously, resistance R10 other end ground connection, model is that the pin 20 of the dialer module U9 of TC35i is connected with single-chip microcomputer pin P2.1 electric wire.Model is that the pin 21 of the dialer module U9 of TC35i is connected with resistance R8 and resistance R11 electric wire simultaneously, resistance R11 other end ground connection, model is that the pin 24 of the dialer module U9 of TC35i is connected with the port 2 i.e. port VCC electric wire of common SIM cards U10 with after pin 28 parallel connection, model is that the pin 25 of the dialer module U9 of TC35i is connected with port 4 electric wire of common SIM cards U10, model is that the pin 26 of the dialer module U9 of TC35i is connected with port 5 electric wire of common SIM cards U10, model is that the pin 27 of the dialer module U9 of TC35i is connected with port 6 electric wire of common SIM cards U10, model is that the pin 29 of the dialer module U9 of TC35i is connected with the port one electric wire of common SIM cards U10, model is that the pin 32 of the dialer module U9 of TC35i is connected with resistance R13 one end electric wire, the other end and the model of resistance R13 are that the base stage electric wire of the triode Q4 of NPN is connected, the negative pole end ground connection of electric capacity C14, positive terminal is connected with port 2 electric wire of common SIM cards U10, model is the grounded emitter of the triode Q4 of NPN, and collector is connected with the negative pole of diode (LED) 1, and the positive pole of diode (LED) 1 is connected with one end electric wire of resistance R12, and the other end and the output valve of resistance R12 are that the direct supply VCC electric wire of 5V is connected.

Described in technical scheme No. 5 signal amplification circuit comprises NPN triode Q2, the resistance R2 that model is s8050.Model is the grounded emitter of the NPN triode Q2 of s8050, base stage is connected with one end electric wire of resistance R2, the other end of resistance R2 is connected with the pin P2.3 electric wire of the single-chip microcomputer in ECU (Electrical Control Unit), model is that the collector electric wire that diode and the one end after relay U6 parallel connection and the model of IN4148 is the triode Q2 of NPN is connected, model is that the diode of IN4148 is connected with the direct supply electric wire of+12V with the other end after relay U6 parallel connection, relay U6 one end is connected with the direct supply electric wire of+12V, the other end of relay U6 is connected with one end electric wire of two twinkle SM signal lamp Light, two twinkle SM signal lamp Light other end ground connection.

Compared with prior art the invention has the beneficial effects as follows:

1. be of the present inventionly set to based on pressure sensing child the mode that early warning system in car combined by pressure transducer and Thermoelectric Infrared Sensor and differentiate, voluntarily life entity situation in the car after parking is detected, without the need to driver's manual operation, achieve precision and the intellectuality of detection.

2. being of the present inventionly set to early warning system in car based on pressure sensing child and adopting three kinds of type of alarms, is first that the hummer that driver has just stood up when getting off is reminded.Secondly on performance element, set up timekeeping system, if car owner does not return in the safe time limit arranged, force start is reported to the police with two twinkle SM signal lamp based on the dialer of global system for mobile communications network, improves security performance.

Accompanying drawing explanation

Below in conjunction with accompanying drawing, the present invention is further illustrated:

Fig. 1 is the structured flowchart being set to early warning system in car based on pressure sensing child of the present invention;

Fig. 2-a is the system enable detection unit and the ECU (Electrical Control Unit) connection diagram that are set to early warning system in car based on pressure sensing child of the present invention;

Fig. 2-b is the pressure transducer and the ECU (Electrical Control Unit) connection diagram that are set to early warning system in car based on pressure sensing child of the present invention;

Fig. 2-c is the Thermoelectric Infrared Sensor and the ECU (Electrical Control Unit) connection diagram that are set to early warning system in car based on pressure sensing child of the present invention;

Fig. 2-d is the hummer control circuit connection diagram being set to early warning system in car based on pressure sensing child of the present invention;

Fig. 2-e is the dialer control circuit connection diagram based on global system for mobile communications network being set to early warning system in car based on pressure sensing child of the present invention;

Fig. 2-f is the two glitch lamp control circuit connection diagrams being set to early warning system in car based on pressure sensing child of the present invention;

Fig. 3 is the layout schematic diagram of pressure transducer on single position being set to early warning system in car based on pressure sensing child of the present invention;

Fig. 4 is the ECU (Electrical Control Unit) structured flowchart being set to early warning system in car based on pressure sensing child of the present invention;

Fig. 5 is of the present inventionly set to ECU (Electrical Control Unit) power module circuitry figure in car in early warning system based on pressure sensing child;

Fig. 6-1 is of the present inventionly set to based on pressure sensing child the FB(flow block) that the system enable detection of early warning system in car and child are set to detecting unit subroutine in car;

Fig. 6-2 is the FB(flow block) being set to the execution subroutine in car in early warning system based on pressure sensing child of the present invention;

In figure: R1 ~ R13. resistance, RF. variable resistor, C1 ~ C14. electric capacity, Q1 ~ Q4. triode, diode (LED) 1, two flashing light Light, inductance L 1.

Embodiment

Below in conjunction with accompanying drawing, the present invention is explained in detail:

Innovative point of the present invention is double check, judgement to whether there being life entity in car, and takes necessary alarm measure, and equipment is simple, and cost is lower, feasibility and operability stronger.The present invention is applicable to average family car and school bus etc., has vital role safely to the children's ride-on improving automobile.

Consult Fig. 1, be of the present inventionly set to early warning system in car based on pressure sensing child and be set to the compositions such as detecting unit in car, ECU (Electrical Control Unit) and performance element primarily of system enable detection unit, child.Wherein child is set to detecting unit in car and includes 9 pressure transducers and Thermoelectric Infrared Sensor, and performance element includes hummer, two twinkle SM signal lamp, dialer based on global system for mobile communications network.

One. system enable detection unit

Consult Fig. 2-a, the diode that described system enable detection unit is IN4148 by snap switch K, model forms.Model is that the diode of IN4148 is connected with one end electric wire of snap switch K with the one end after the control system parallel connection of the relay U12 in ECU (Electrical Control Unit), the other end ground connection of snap switch K, model is that the diode of IN4148 is connected with the direct supply electric wire of+12V with the other end after the control system parallel connection of the relay U12 in ECU (Electrical Control Unit).Relay U12 in ECU (Electrical Control Unit) is connected with providing the ECU (Electrical Control Unit) power module electric wire in the ECU (Electrical Control Unit) of+5V by control system one end, and the other end is connected with the microcontroller power supply pin VCC electric wire in ECU (Electrical Control Unit).

After key is extracted by car owner, snap switch K closes, the control system place circuit ON of the relay U12 in ECU (Electrical Control Unit), relay U12 after circuit ON in ECU (Electrical Control Unit) is connected by the connecting circuit of control system by the ECU (Electrical Control Unit) power module in ECU (Electrical Control Unit) and the single-chip microcomputer in ECU (Electrical Control Unit), namely makes the single-chip microcomputer supply+5V DC voltage in the ECU (Electrical Control Unit) electric power source pair of module ECU (Electrical Control Unit) in ECU (Electrical Control Unit).When ECU (Electrical Control Unit) starts, then whether other unit starting to judge to be set to based on pressure sensing child in-vehicle alarm system should start.

Two. child is set to detecting unit in car

Consult Fig. 2-b and Fig. 2-c, described child is set to detecting unit in car and is made up of 9 pressure transducer U3, No. 1 signal amplification circuit, Thermoelectric Infrared Sensor and No. 2 signal amplification circuits.

1. pressure transducer

Consult Fig. 2-b, described pressure transducer U3 is tekscan the sensor of Sensors A201.This pressure transducer U3 can be more accurate the object of sense weight in 45kg, can reach and detect the object of child, and this pressure transducer U3 susceptibility is good, can meet the requirement of accurate detection of dynamic.Every three pressure transducer U3 are that a component is fallen apart and is arranged on a seat of automobile rear.Mounting means consults Fig. 3, circle on seat shown in figure represents pressure transducer U3, each seat is provided with the pressure transducer U3 that three structures are identical, 3 pressure transducer U3 of first group are called No. 1 pressure transducer U3, No. 2 pressure transducer U3, No. 3 pressure transducer U3, shape triangular in shape, prevent the erroneous judgement because child's shift in position causes, improve accuracy and the reliability of detection.

No. 1 signal amplification circuit (namely by identical No. 1 pressure sensor circuit of structure, No. 2 pressure sensor circuits, No. 3 pressure sensor circuit ... form with No. 9 pressure sensor circuits) comprise transistor that model is MCP6004-E/P, charge pump U5, electric capacity C3, electric capacity C4, electric capacity C5 that voltage stabilizing diode that variable resistor RF, model are IN4370, model are TPS60400.

The connected mode of pressure transducer U3 and ECU (Electrical Control Unit) is described for No. 1 pressure sensor circuit in figure: model is that the cathode voltage input port 2 of the transistor of MCP6004-E/P is connected with a port electric wire of No. 1 pressure transducer U3, and model is that the cathode voltage input port 3 of the transistor of MCP6004-E/P is connected with earth terminal GND electric wire.Model is that the cathode voltage input port 2 of the transistor of MCP6004-E/P is connected with one end electric wire of variable resistor RF, the other end and the model of variable resistor RF are that voltage output end mouth 1 electric wire of the transistor of MCP6004-E/P is connected, and above formation sign-changing amplifier can amplify the voltage signal of pressure transducer U3.Another port and the model of No. 1 pressure transducer U3 are that one end electric wire of the voltage stabilizing diode of IN4370 is connected, and output port 1 electric wire that the other end and model that model is the voltage stabilizing diode of IN4370 are the charge pump U5 of TPS60400 is connected, be connected with the positive terminal electric wire of the electric capacity C3 of one end ground connection simultaneously.Model is that the direct supply electric wire that input port 2 and the output valve of the charge pump U5 of TPS60400 is 5V is connected, and is connected with the positive terminal electric wire of the electric capacity C4 of one end ground connection simultaneously.Model is that the port 4 of the charge pump U5 of TPS60400 is connected with earth terminal GND electric wire, and model is that the port 5 i.e. port Cfly+ of the charge pump U5 of TPS60400 is connected with self port 3 i.e. port Cfly-electric wire after electric capacity C5.Model is that the input port AIN0 electric wire that voltage output end mouth 1 and No. 1 model of the transistor of MCP6004-E/P is the modulus conversion chip U1 of TCL2543 is connected.

No. 2 pressure sensor circuits and No. 3 pressure sensor circuits are connected into respectively by above-mentioned the same manner, No. 2 pressure sensor circuits and No. 3 pressure sensor circuits identical with the structure of No. 1 pressure sensor circuit, all comprise transistor that model is MCP6004-E/P, charge pump U5, electric capacity C3, electric capacity C4, electric capacity C5 that voltage stabilizing diode that variable resistor RF, model are IN4370, model are TPS60400.Be connected respectively with No. 1 pressure transducer U3, No. 2 pressure transducer U3, No. 3 pressure transducer U3 three overlap pressure sensor circuit forms one group of pressure sensor circuit altogether, and the modulus conversion chip U1 being TCL2543 with No. 1 model is connected.Wherein: model is that the input port AIN0 electric wire that voltage output end mouth 1 and No. 1 model of the transistor of MCP6004-E/P is the modulus conversion chip U1 of TCL2543 is connected.Model in No. 2 pressure sensor circuits be connected with No. 2 pressure transducer U3 is that the input port AIN1 electric wire that voltage output end mouth 1 and No. 1 model of the transistor of MCP6004-E/P is the modulus conversion chip U1 of TCL2543 is connected.Model in No. 3 pressure sensor circuits be connected with No. 3 pressure transducer U3 is that the input port AIN2 electric wire that voltage output end mouth 1 and No. 1 model of the transistor of MCP6004-E/P is the modulus conversion chip U1 of TCL2543 is connected.

Model is that the port CS of No. 1 modulus conversion chip U1 of TCL2543 is connected with the pin P1.0 electric wire of the single-chip microcomputer in ECU (Electrical Control Unit).Model is port one 0 and port one 3 ground connection of No. 1 modulus conversion chip U1 of TCL2543, and No. 1 model is that the port one 4 of the modulus conversion chip U1 of TCL2543 is connected with vehicle-mounted+5V direct supply with port 20.No. 1 model is that the port I/O CLOCK of the modulus conversion chip U1 of TCL2543 is connected with the pin P1.1 electric wire of the single-chip microcomputer in ECU (Electrical Control Unit), No. 1 model is that the port DATA INPUT of the modulus conversion chip U1 of TCL2543 is connected with the pin P1.2 electric wire of the single-chip microcomputer in ECU (Electrical Control Unit), and No. 1 model is that the port DATA OUT of the modulus conversion chip U1 of TCL2543 is connected with the pin P1.3 electric wire of the single-chip microcomputer in ECU (Electrical Control Unit).

6 pressure transducer U3 that child is set to other 2 groups of detecting unit in car are called No. 4 pressure transducer U3, No. 5 pressure transducer U3, No. 6 pressure transducer U3, No. 7 pressure transducer U3, No. 8 pressure transducer U3, No. 9 pressure transducer U3.

The associated component be connected respectively with No. 4 pressure transducer U3, No. 5 pressure transducer U3, No. 6 pressure transducer U3 overlaps pressure sensor circuit i.e. No. 4 pressure sensor circuits, No. 5 pressure sensor circuits and No. 6 pressure sensor circuits by connect into second group shown in mentioned above and Fig. 2-b three.No. 4 pressure sensor circuits, No. 5 pressure sensor circuits are identical with the structure of No. 6 pressure sensor circuits, all comprise transistor that model is MCP6004-E/P, charge pump U5, electric capacity C3, electric capacity C4, electric capacity C5 that voltage stabilizing diode that variable resistor RF, model are IN4370, model are TPS60400.The modulus conversion chip U1 that three cover pressure sensor circuits and No. 2 models of second group are TCL2543 is connected.Wherein: the model in No. 4 pressure sensor circuits be connected with No. 4 pressure transducer U3 is that the input port AIN0 electric wire that voltage output end mouth 1 and No. 2 models of the transistor of MCP6004-E/P are the modulus conversion chip U1 of TCL2543 is connected.The model be connected with No. 5 pressure transducer U3 in No. 5 pressure sensor circuits is that the input port AIN1 electric wire that voltage output end mouth 1 and No. 2 models of the transistor of MCP6004-E/P are the modulus conversion chip U1 of TCL2543 is connected.Model in No. 6 pressure sensor circuits be connected with No. 6 pressure transducer U3 is that the input port AIN2 electric wire that voltage output end mouth 1 and No. 2 models of the transistor of MCP6004-E/P are the modulus conversion chip U1 of TCL2543 is connected.No. 2 models are that the port CS of the modulus conversion chip U1 of TCL2543 is connected with the pin P0.0 electric wire of the single-chip microcomputer in ECU (Electrical Control Unit).No. 2 models are that the port I/O CLOCK of the modulus conversion chip U1 of TCL2543 is connected with the pin P0.1 electric wire of the single-chip microcomputer in ECU (Electrical Control Unit), No. 2 models are that the port DATA INPUT of the modulus conversion chip U1 of TCL2543 is connected with the pin P0.2 electric wire of the single-chip microcomputer in ECU (Electrical Control Unit), and model is that the port DATA OUT of No. 2 modulus conversion chip U1 of TCL2543 is connected with the pin P0.3 electric wire of the single-chip microcomputer in ECU (Electrical Control Unit).

The associated component be connected respectively with No. 7 pressure transducer U3, No. 8 pressure transducer U3, No. 9 pressure transducer U3 overlaps pressure sensor circuit i.e. No. 7 pressure sensor circuits, No. 8 pressure sensor circuits and No. 9 pressure sensor circuits by connect into the 3rd group shown in mentioned above and Fig. 2-b respectively three.No. 7 pressure sensor circuits, No. 8 pressure sensor circuits are identical with the structure of No. 9 pressure sensor circuits, all comprise transistor that model is MCP6004-E/P, charge pump U5, electric capacity C3, electric capacity C4, electric capacity C5 that voltage stabilizing diode that variable resistor RF, model are IN4370, model are TPS60400.The modulus conversion chip U1 that three cover pressure sensor circuits and No. 3 models of the 3rd group are TCL2543 is connected.Wherein: the model in No. 7 pressure sensor circuits be connected with No. 7 pressure transducer U3 is that the input port AIN0 electric wire that voltage output end mouth 1 and No. 3 models of the transistor of MCP6004-E/P are the modulus conversion chip U1 of TCL2543 is connected.Model in No. 8 pressure sensor circuits be connected with No. 8 pressure transducer U3 is that the input port AIN1 electric wire that voltage output end mouth 1 and No. 3 models of the transistor of MCP6004-E/P are the modulus conversion chip U1 of TCL2543 is connected.Model in No. 9 pressure sensor circuits be connected with No. 9 pressure transducer U3 is that the input port AIN2 electric wire that voltage output end mouth 1 and No. 3 models of the transistor of MCP6004-E/P are the modulus conversion chip U1 of TCL2543 is connected.No. 3 models are that the port CS of the modulus conversion chip U1 of TCL2543 is connected with the pin P0.4 electric wire of the single-chip microcomputer in ECU (Electrical Control Unit).No. 3 models are that the port I/O CLOCK of the modulus conversion chip U1 of TCL2543 is connected with the pin P0.5 electric wire of the single-chip microcomputer in ECU (Electrical Control Unit), No. 3 models are that the port DATA INPUT of the modulus conversion chip U1 of TCL2543 is connected with the pin P0.6 electric wire of the single-chip microcomputer in ECU (Electrical Control Unit), and No. 3 models are that the port DATA OUT of the modulus conversion chip U1 of TCL2543 is connected with the pin P0.7 electric wire of the single-chip microcomputer in ECU (Electrical Control Unit).

Child is set to detecting unit in car and adopts the numerical value sum M often organizing 3 pressure transducer U3 to represent the body weight of tested child, consults M shown in Fig. 6-1, figure ₀₁and M ₀₂represent respectively set, can to determine according to China 2 ~ 18 years old children's body weight percentile curves figure native system towards the possible weight range of child.If the value of M is not within the scope of systemic presupposition, is then of the present inventionly set to early warning system in car based on pressure sensing child and automatically resets and close.If the value of M meets the scope of systemic presupposition, then every 0.5s performs one-time detection instruction again, repeatedly performs 3 times.If 3 times result all meets systemic presupposition scope, then open Thermoelectric Infrared Sensor.

2. Thermoelectric Infrared Sensor

Consult Fig. 2-c, Thermoelectric Infrared Sensor U8 is a kind of new type of high sensitivity detecting element.Can export electric signal with the change of the infrared energy of noncontact form human body radiation, its effect judges to detect this weight whether outside radiations heat energy when having the weight of doubtful child in car at pressure transducer, and then determine whether life entity.

No. 2 signal amplification circuits comprise NPN triode Q3, resistance R3, resistance R4, electric capacity C6, the electric capacity C7 that model is s8050.

Be the annexation of Thermoelectric Infrared Sensor U8 of the present invention and No. 2 signal amplification circuit and ECU (Electrical Control Unit) shown in Fig. 2-c: model is that NPN triode Q3, the resistance R3 of s8050 and resistance R4 form amplifying circuit.Input port 3 and the output valve of Thermoelectric Infrared Sensor U8 are that the direct supply VCC electric wire of+5V is connected, the input port 2 of Thermoelectric Infrared Sensor U8 is connected with electric capacity C7 electric wire, the base stage electric wire that the other end of electric capacity C7 is the NPN triode Q3 of s8050 with the resistance R4 in amplifying circuit and model is simultaneously connected, is that the direct supply VCC of 5V and one end electric wire of resistance R3 are connected with output valve while of the other end of resistance R4.The other end of the resistance R3 in amplifying circuit is connected with electric capacity C6 electric wire, and the other end and the model of electric capacity C6 are that the input port 3 i.e. analog input channel CH1 electric wire of the modulus conversion chip U7 of ADC0832 is connected; Model is that the collector electric wire of the NPN triode Q3 of s8050 is connected between resistance R3 and electric capacity C6, and model is that the emitter of the NPN triode Q3 of s8050 is connected with earth terminal GND electric wire.Model is that the port one of the modulus conversion chip U7 of ADC0832 and port CS are connected with the pin P3.5 electric wire of the single-chip microcomputer in ECU (Electrical Control Unit).Model is that the port 2 of the modulus conversion chip U7 of ADC0832 is vacant, port 4 ground connection.Model is the port 5 i.e. port DI of the modulus conversion chip U7 of ADC0832 is data signal input mouth, and port 6 i.e. port DO is data signal output mouth, and both are connected with the pin P3.3 electric wire of the single-chip microcomputer in ECU (Electrical Control Unit) simultaneously.Model is the port 7 i.e. port CLK of the modulus conversion chip U7 of ADC0832 is control chip input end of clock mouth, is connected with the pin P3.4 electric wire of the single-chip microcomputer in ECU (Electrical Control Unit).Model is that the port 8 i.e. port VCC of the modulus conversion chip U7 of ADC0832 is connected with the direct supply electric wire of+5V.

The double check of 9 pressure transducer U3 and Thermoelectric Infrared Sensor U8 has accuracy and reliability significantly.When the signal that Thermoelectric Infrared Sensor U8 detects does not meet preset range, be of the present inventionly set to early warning system in car based on pressure sensing child and automatically close.If signal meets preset range, then judge the children that truly having in car passes into silence and performance element is opened.

Three. performance element

Described performance element is by hummer, two twinkle SM signal lamp, form based on the dialer (GSM dialer) of global system for mobile communications (Global System of Mobile communication and GSM) network, No. 3 signal amplification circuits, No. 4 signal amplification circuits and No. 5 signal amplification circuits.Consulting shown in Fig. 6-2, figure is the workflow block diagram of performance element.

1. hummer

Consult Fig. 2-d, the hummer of described performance element is common active buzzer U4.

No. 3 signal amplification circuits comprise NPN triode Q1, the resistance R1 that model is s8050.

The annexation of diagram hummer U4 and ECU (Electrical Control Unit) is: model is the grounded emitter of the NPN triode Q1 of s8050, model is that the base stage of the NPN triode Q1 of s8050 is connected with resistance R1 electric wire, the resistance R1 other end is connected with the pin P1.5 electric wire of the single-chip microcomputer in ECU (Electrical Control Unit), model is that the collector of the NPN triode Q1 of s8050 is connected with one end electric wire of (BUZZER) hummer U4, and the other end of hummer (BUZZER) U4 is connected with the positive electrical wire of+5V direct supply.

Hummer shown in figure is arranged near operating seat.Its effect be judge in car truly have the children passed into silence time, carry out warning reminding in time when driver leaves automobile, Accident prevention generation.While hummer is opened, start timing, restart pressure transducer after 2 minutes, obtain quality state amount M.When M value is within possible error range, when being namely not more than preset value Kid.Can think that child is out of danger, of the present inventionly be set to early warning system in car based on child and automatically reset and close.When M value is greater than limit of error value, then thinking child still in car, needing by reminding further car owner based on the dialer of global system for mobile communications network, remove the danger of child in time.

2. based on the dialer of global system for mobile communications network

Consult Fig. 2-e, the described dialer based on global system for mobile communications network (GSM) comprises dialer module U9, the common SIM cards U10 that model is TC35i.

No. 4 signal amplification circuits comprise the NPN triode Q4 that model is s8050, resistance R5, resistance R6, resistance R7, resistance R8, resistance R9, resistance R10, resistance R11, resistance R12, resistance R13, electric capacity C8, electric capacity C9, electric capacity C10, electric capacity C11, electric capacity C12, electric capacity C13, electric capacity C14, LED 1.

Illustrate and based on the dialer of global system for mobile communications network and ECU (Electrical Control Unit) annexation be: model is the pin 1 of the dialer module U9 of TC35i, pin 2, pin 3, pin 4, electrochemical capacitor C8 after pin 5 is in parallel simultaneously and after parallel connection, electrochemical capacitor C9, electrochemical capacitor C10, electrochemical capacitor C11, electrochemical capacitor C12, the positive electrical wire of electrochemical capacitor C13 is connected, electrochemical capacitor C8, electrochemical capacitor C9, electrochemical capacitor C10, electrochemical capacitor C11, electrochemical capacitor C12, the positive electrical wire of electrochemical capacitor C13 is connected, the other end (negative pole) ground connection of electric capacity, the positive pole of electrochemical capacitor C13 is connected with one end electric wire of resistance R5 as the output terminal (positive terminal) of electrochemical capacitor group simultaneously, the other end and the output valve of resistance R5 are that the direct supply VCC electric wire of+5V is connected.Model is the pin 6 of the dialer module U9 of TC35i, pin 7, pin 8, pin 9, pin 10 in parallel after to be connected with the negative pole end of electric capacity C13 also ground connection.Model is that the pin 15 of the dialer module U9 of TC35i is connected with one end electric wire of resistance R6 and resistance R9 simultaneously, and the resistance R6 other end is connected with the single-chip microcomputer pin P2.0 electric wire in ECU (Electrical Control Unit), resistance R9 other end ground connection.Model is that the pin 18 of the dialer module U9 of TC35i is connected with single-chip microcomputer pin P3.0 electric wire.Model is that the pin 19 of the dialer module U9 of TC35i is connected with resistance R10 with resistance R7 simultaneously, and the resistance R7 other end is connected with single-chip microcomputer pin P3.1 electric wire, resistance R10 other end ground connection.Model is that the pin 20 of the dialer module U9 of TC35i is connected with single-chip microcomputer pin P2.1 electric wire.Model is that the pin 21 of the dialer module U9 of TC35i is connected with resistance R8 and resistance R11 electric wire simultaneously, and the resistance R8 other end is connected with single-chip microcomputer pin P2.2 electric wire, resistance R11 other end ground connection.Model is that the pin 24 of the dialer module U9 of TC35i is connected with the port 2 i.e. port VCC electric wire of common SIM cards U10 with after pin 28 parallel connection, model is that the pin 25 of the dialer module U9 of TC35i is connected with the port 4 i.e. port RST of common SIM cards U10, model is that the pin 26 of the dialer module U9 of TC35i is connected with the port 5 i.e. port I/O electric wire of common SIM cards U10, model is that the pin 27 of the dialer module U9 of TC35i is connected with the port 6 i.e. port CLK electric wire of common SIM cards U10, model is that the pin 29 of the dialer module U9 of TC35i is connected with the port one of common SIM cards U10 and port GND.Model is that the pin 32 of the dialer module U9 of TC35i is connected with resistance R13 one end electric wire.The other end and the model of resistance R13 are that the base stage electric wire of the triode Q4 of NPN is connected.One end (negative pole end) ground connection of electric capacity C14, the port 2(of the other end (positive terminal) and common SIM cards U10 and port) VCC electric wire is connected.That is port NC is vacant for the port 3 of common SIM cards U10.Model is the grounded emitter of the triode Q4 of NPN, and collector is connected with the negative pole of diode (LED) 1, and the positive pole of diode (LED) 1 is connected with one end electric wire of resistance R12, and the other end and the output valve of resistance R12 are that the direct supply VCC electric wire of+5V is connected.

The described dialer based on global system for mobile communications network (GSM) is existing shaped article at present, domestic brought into use based on global system for mobile communications network dial device have the WMO2 series of the A2D of Falcom series, Wavecome, the TC35 series of Siemens, Ericsson DM10/DM20 series, in emerging ZXGM18 series etc., and the function of these modules, usage difference are little.Wherein the TC35 series module cost performance of Siemens is very high, and has had domestic wireless device networking card.So the design selects is the TC35i of Siemens TC35 series.TC35i is the up-to-date wireless product that Siemens releases, functionally compatible, compact to design with TC35, greatly reduces the volume of consumer products.And be easy to upgrade to GPRS module.This module integrates radio circuit and base band, provides the AT command interface of standard to user, for data, voice, short message and fax provide quick, reliable, safe transmission, and user friendly application and development and design.

Dialer based on global system for mobile communications network (GSM) is arranged under assistant driver seat, its effect is when judging that the hummer children's danger rung in rear car is removed not yet, send reminding short message to the driver leaving automobile, prevent tragedy accident from occurring.Hummer rings after 2 minutes and sends first time note, sends a reminding short message at interval of 5 minutes later.If car owner comes back within 20 minutes, ECU (Electrical Control Unit) is closed, then can think that child has departed from possible danger.If still reactionless after 20 minutes, then think that child is still in car, may produce danger, need to carry out warning reminding by two twinkle SM signal lamp to neighbouring pedestrian etc., remove the danger of child in time.

3. pair twinkle SM signal lamp

Consult Fig. 2-f, the two twinkle SM signal lamps shown in figure are the basic configuration of automobile own.Control circuit is modified on the circuit of automobile own.Amended circuit comprises the diode and relay U6, two twinkle SM signal lamp Light that model is IN4148.

No. 5 signal amplification circuits comprise NPN triode Q2, the resistance R2 that model is s8050.

The two twinkle SM signal lamp of diagram is as follows with ECU (Electrical Control Unit) connected mode: the collector electric wire that model is one end after the diode of IN4148 and the control system parallel connection of relay U6 is the NPN triode Q2 of s8050 with model is connected, and model is that the other end after the diode of IN4148 and the control system parallel connection of relay U6 is connected with the direct supply electric wire of+12V.Relay U6 is connected with the direct supply electric wire of+12V by control system one end, and the other end is connected with one end electric wire of two twinkle SM signal lamp Light, two twinkle SM signal lamp Light other end ground connection.Model is the grounded emitter of the NPN triode Q2 of s8050, and base stage is connected with one end electric wire of resistance R2.The other end of resistance R2 is connected with the pin P2.3 electric wire of the single-chip microcomputer in ECU (Electrical Control Unit).Relay U6 in two glitch lamp control circuit controls the opening and closing of two twinkle SM signal lamp Light, its effect sends car owner after note in confirmation not come back and take measures on customs clearance, when children's danger in car is removed not yet, the pedestrian to vehicle periphery gives the alarm signal, prevents tragedy accident from occurring.

Four. ECU (Electrical Control Unit)

Consult Fig. 4, the modulus conversion chip U1(that described ECU (Electrical Control Unit) is TLC2543 by single-chip microcomputer, ECU (Electrical Control Unit) power module, model comprise modulus conversion chip U1 that No. 1 model is TCL2543, No. 2 models are the modulus conversion chip U1 of TCL2543, modulus conversion chip U1 that No. 3 models are TCL2543), model is that modulus conversion chip U7, the relay U12 of ADC0832 forms.

Single-chip microcomputer in described ECU (Electrical Control Unit) is that the self-editing electronic installation realizing child and the computer program reminded that gives the alarm in inspection vehicle is housed, and described computer program comprises system enable detection and child is set to detecting unit subroutine, execution subroutine in car.ECU (Electrical Control Unit) implements the function of computer program, makes to be set to early warning system in car based on pressure sensing children and can realize child and the correlation functions such as prompting that give the alarm in inspection vehicle.

ECU (Electrical Control Unit) power module supplies+5V DC voltage to the modulus conversion chip U7 of model to be the modulus conversion chip U1 of TLC2543 and model be ADC0832 respectively.The core of ECU (Electrical Control Unit) is single-chip microcomputer, and the pin VCC of single-chip microcomputer is connected with the system wires that controlled of relay U12, and relay U12 is connected with ECU (Electrical Control Unit) power module electric wire by the other end of control system.The control system of relay U12 is connected with the output terminal electric wire in enable detection unit, and enable detection unit controls relay U12 is by the break-make of control system place circuit, and when the circuit is on, ECU (Electrical Control Unit) power module is to single-chip microcomputer supply+5V DC voltage.

Consult Fig. 2-b, cathode voltage input port 2 electric wire that signal output part and the model in No. 1 signal amplification circuit (i.e. 1 to No. 9 pressure sensor circuit) of each pressure transducer U3 are the transistor of MCP6004-E/P is connected, model is that input port AINX electric wire that voltage output end mouth 1 and 1 to No. 3 model of the transistor of MCP6004-E/P is the modulus conversion chip U1 of TCL2543 is connected (X=0,1,2).When each pressure transducer U3 is No. 1 pressure transducer U3, No. 2 pressure transducer U3, No. 3 pressure transducer U3 of first group, No. 1 model is that the other end of the modulus conversion chip U1 of TLC2543 is connected with single-chip microcomputer pin P1.0, P1.1, P1.2, P1.3.When each pressure transducer U3 is No. 4 pressure transducer U3, No. 5 pressure transducer U3, No. 6 pressure transducer U3, No. 2 models are that the other end of the modulus conversion chip U1 of TLC2543 is connected with single-chip microcomputer pin P0.0, P0.1, P0.2, P0.3.When each pressure transducer U3 is No. 7 pressure transducer U3, No. 8 pressure transducer U3, No. 9 pressure transducer U3, No. 3 models are that the other end of the modulus conversion chip U1 of TLC2543 is connected with single-chip microcomputer pin P0.4, P0.5, P0.6, P0.7 electric wire.

Consult Fig. 2-c, the signal output port 2 i.e. port OUT of Thermoelectric Infrared Sensor U8 is connected with one end electric wire of the electrochemical capacitor C7 in No. 2 signal amplification circuits, the port 3 i.e. port CHI electric wire that No. 2 signal amplification circuit other ends and model are the modulus conversion chip U7 of ADC0832 is connected, and model is that the modulus conversion chip U7 other end of ADC0832 and port CLK are connected with the pin P3.4 electric wire of single-chip microcomputer.

Consult Fig. 2-d, signal input port and the model in No. 3 signal amplification circuits of hummer U4 are that the collector electric wire of the NPN triode Q1 of s8050 is connected, and the other end of No. 3 signal amplification circuits is connected with the pin P1.5 electric wire of single-chip microcomputer.

Consult Fig. 2-e, the signal input pin 20 based on the dialer U9 of global system for mobile communications network is connected with single-chip microcomputer pin P2.1 electric wire, and pin 18 is connected with single-chip microcomputer pin P3.0 electric wire.Pin 15, pin 19, pin 21 are connected with No. 4 signal amplification circuit electric wires respectively.The other end of No. 4 signal amplification circuits is connected with single-chip microcomputer pin P2.0, pin P3.1, pin P2.2 electric wire.

Consult Fig. 2-f, signal input port and the model in No. 5 signal amplification circuits of two twinkle SM signal lamp are that the collector electric wire of the triode Q2 of NPN is connected.The other end of No. 5 signal amplification circuits is connected with the pin P2.3 electric wire of single-chip microcomputer.

1. single-chip microcomputer

Of the present inventionly to be set in car early warning system based on pressure sensing child and to adopt model to be the single-chip microcomputer of STC89C51, be arranged on below operating seat, the STC series monolithic adopted is the single-chip microcomputer of a kind of novel 51 kernels of the up-to-date release of STC Corporation of the U.S..Model is that the single-chip microcomputer of STC89c51 is interior containing the module such as Flash program storage, SRAM, UART, SPI, A D, PWM.

Consult Fig. 6-1, it is as follows that system enable detection unit and child are set to detecting unit subroutine flow in car:

After key is extracted by car owner, the circuit communication that ECU (Electrical Control Unit) power module is powered to single-chip microcomputer, ECU (Electrical Control Unit) starts.

Each pressure transducer U3 starts detected pressures, now system counts i=1, and three pressure transducer U3 detect respectively and obtain three data M ₁, M ₂, M ₃, and three data additions are obtained stagnation pressure force value M, judge that whether M is at preset value M ₀₁with M ₀₂(M ₀₁with M ₀₂maximum, the minimum pressure reference quantity that user set in advance according to the age of detected object and body weight) between, if not then judge that this weight is not children, system finishing process enters holding state; If then other three data m again detected after 0.5 second ₁, m ₂, m ₃, carry out M respectively ₁-m ₁, M ₂-m ₂, M ₃-m ₃, judge whether three pressure difference values of gained are less than error permissible value Δ.If be greater than error permissible value, illustrate that this weight is children, start performance element; If be less than error permissible value, make i=i+1, and repeat the step of described detected pressures above until variable i is greater than 3.

If above-mentioned trace routine gained pressure difference value is less than error permissible value all the time, then still accurately can not judge whether this weight is children, next Thermoelectric Infrared Sensor should be opened, obtain quantity of state T, if T=0, illustrate that the heat that this weight distributes does not belong in the scope of life entity distribute heat, be not children, then system finishing process enters holding state; If T is not equal to 0, illustrate that this weight is children, start performance element.

Consult Fig. 6-2, the execution subroutine flow process be set in car in early warning system based on pressure sensing child of the present invention is as follows: after receiving the signal that single-chip microcomputer sends, hummer starts and timer starts timing, start each pressure transducer U3 detected pressures after 2 minutes and obtain stagnation pressure force value M, judging whether M is less than preset value M ₀₁(minimum pressure reference quantity), if M is less than M ₀₁then illustrate that children are removed, native system terminates process and enters holding state; If M is greater than M ₀₁then children are described still on the seat, system counts initial value P=1 is set, the dialer (GSM dialer) based on global system for mobile communications network is also started during timer, period each pressure transducer U3 continue to detect time delay after 5 minutes counting variable P add 1, and repeat to dial with the step of pressure detection until P is greater than 4.

If system stops not yet after said procedure performs, children are described still on the seat, now open two twinkle SM signal lamp and continuous firing, each pressure transducer U3 constantly detects simultaneously, judges whether stagnation pressure force value M belongs to children's weight range, until M is less than M ₀₁, illustrate that children are removed, then close two twinkle SM signal lamp, system finishing process enters holding state.

2. ECU (Electrical Control Unit) power module

Consult Fig. 5, controller power source module of the present invention comprises switching mode voltage stabilizing chip U11, diode IN5822, electric capacity C15, C16, inductance L 1.

The chip of described switching mode voltage stabilizing chip U11 to be model be LM2576; LM2576 series is the 3A electric current output buck switching mode chip that National Semiconductor produces; it includes fixed oscillator (52kHz) and benchmark voltage stabilizer (1.23V); and there is perfect protection circuit; comprise current limit and Thermal shutdown circuit etc., utilize this device only to need few peripheral components just can form efficient mu balanced circuit.LM2576 series comprises LM2576 (maximum input voltage 40V) and LM2576HV (maximum input voltage 60V) two series.Each series of products all provide 3.3V (-3.3), 5V (-5.0), multiple voltage class product such as 12V (-12), 15V (-15) and adjustable (-ADJ).In addition, this chip additionally provides the external control pin of duty.

The vehicle power electric wire that maximum voltage input port 1 i.e. port Vin and the output valve of switching mode voltage stabilizing chip U11 are+12V is connected, the output port 2 i.e. port OUTPUT of switching mode voltage stabilizing chip U11 is connected with diode IN5822 electric wire, is connected with one end electric wire of inductance L 1 simultaneously.The other end of diode IN5822 is connected with the negative pole end of electric capacity C16 and simultaneously ground connection, and the other end output voltage values of inductance L 1 is the burning voltage of+5V.The port 3 i.e. port GND of switching mode voltage stabilizing chip U11 is connected with the negative pole end electric wire of electric capacity C15 and simultaneously ground connection, and positive terminal and the output valve of electric capacity C15 are that the vehicle power electric wire of+12V is connected.The port 4 i.e. port FEEDBACK of switching mode voltage stabilizing chip U11 is connected with the positive terminal electric wire of electric capacity C16.The port 5 i.e. port ON/OFF ground connection of switching mode voltage stabilizing chip U11.

3. model is the modulus conversion chip of TLC2543

12 analog to digital converters of the model that native system adopts to be the modulus conversion chip U1 of TLC2543 be 11 input ends, have that conversion is fast, good stability, with the advantage such as Microprocessor Interface is simple, price is low.It is with Serial Peripheral Interface (SPI), is a kind of multichannel A/D converter.

The model that native system adopts is that the interlock circuit of the modulus conversion chip U1 of TLC2543 connects the related Sections can consulting Fig. 2-a and described pressure transducer U3 above.

4. model is the modulus conversion chip of ADC0832

The model that native system adopts is the modulus conversion chip U7 of ADC0832 is one 8 bit resolution, the double channel A/D conversion chip that National Semiconductor produces, and it reaches as high as 256 grades, can adapt to general analog quantity conversion requirements.The input of its internal electric source is multiplexing with reference voltage, makes the analog voltage input of chip between 0 ~ 5V.Chip is only 32 μ S switching time, and export according to there being Double Data and can be used as data check, to reduce data error, slewing rate is fast and stability is strong.Independently chip enable input, makes many devices mount and processor controls the convenient of change.By DI data input pin, the selection of channel function can be realized easily.

The model that native system adopts is that the interlock circuit of the modulus conversion chip U7 of ADC0832 connects and can consult Fig. 2-b and described Thermoelectric Infrared Sensor U8 related Sections above.

Each signal amplification circuit designed by native system connect can consult Fig. 2-a to Fig. 2-e and above described child be set to detecting unit and performance element related Sections in car.

The principle of work of early warning system in car is set to as follows based on pressure sensing child:

Consult Fig. 1, the present invention pulls up ECU (Electrical Control Unit) when car key prepares to get off car owner and starts, and makes child be set to detecting unit in car and start after ECU (Electrical Control Unit) self-inspection non-fault.Child to be set in car after detecting unit starts, 9 pressure transducer U3 detect on corresponding seat whether have the weight of force value in setting range automatically, if there is the weight of the dynamic change of force value in setting range, then signal feedback is to ECU (Electrical Control Unit), starts performance element; If have the weight of force value in setting range but without dynamic change, start Thermoelectric Infrared Sensor and judge whether it is life entity further.If judged, seat has life entity to exist, then signal feedback is to the single-chip microcomputer of ECU (Electrical Control Unit), and single-chip microcomputer starts performance element.First performance element sends alarm signal by hummer after starting in time.If car owner does not take measures, then start timing, after the time that timing exceedes setting, then single-chip microcomputer controls again to send an SOS based on the mobile phone of dialer to car owner of global system for mobile communications network to remind.If car owner takes measures not yet after repeatedly reminding, Single-chip Controlling vehicle self is opened two twinkle SM signal lamp and is sent an SOS towards periphery.

Claims

1. be set to an early warning system in car based on pressure sensing child, it is characterized in that, described be set to early warning system in car based on pressure sensing child and be set to detecting unit in car, ECU (Electrical Control Unit) and performance element formed by system enable detection unit, child;

Modulus conversion chip U7, relay U12 that the modulus conversion chip U1 that described ECU (Electrical Control Unit) is TCL2543 by single-chip microcomputer, ECU (Electrical Control Unit) power module, model, model are ADC0832 form;

+ 5V output terminal and the model of ECU (Electrical Control Unit) power module are the port one 4 of the modulus conversion chip U1 of TCL2543 and port 20, model is that the input port 3 of the modulus conversion chip U7 of ADC0832 is connected with the system wires that controlled of relay U12, and relay U12 is connected with the pin VCC electric wire of single-chip microcomputer by the other end of control system;

Model is that the port CLK of the modulus conversion chip U7 of ADC0832 is connected with the pin P3.4 electric wire of single-chip microcomputer, and model is that the port DO of the modulus conversion chip U7 of ADC0832 pin P3.3 electric wire that is same with port DI and single-chip microcomputer is connected; Model is that the modulus conversion chip U1 of TCL2543 is connected with single-chip microcomputer electric wire;

2. be set to early warning system in car according to according to claim 1 based on pressure sensing child, it is characterized in that, described model is the modulus conversion chip U1 that the modulus conversion chip U1 of TCL2543 comprises modulus conversion chip U1 that No. 1 model is TCL2543, No. 2 models are the modulus conversion chip U1 of TCL2543, No. 3 models are TCL2543;

No. 1 model is that the port I/O CLOCK of the modulus conversion chip U1 of TCL2543 is connected with the pin P1.1 electric wire of the single-chip microcomputer in ECU (Electrical Control Unit), No. 1 model is that the port DATA INPUT of the modulus conversion chip U1 of TCL2543 is connected with the pin P1.2 electric wire of the single-chip microcomputer in ECU (Electrical Control Unit), and No. 1 model is that the port DATA OUT of the modulus conversion chip U1 of TCL2543 is connected with the pin P1.3 electric wire of single-chip microcomputer;

No. 2 models are that the port I/O CLOCK of the modulus conversion chip U1 of TCL2543 is connected with the pin P0.1 electric wire of the single-chip microcomputer in ECU (Electrical Control Unit), No. 2 models are that the port DATA INPUT of the modulus conversion chip U1 of TCL2543 is connected with the pin P0.2 electric wire of the single-chip microcomputer in ECU (Electrical Control Unit), and model is that the port DATA OUT of No. 2 modulus conversion chip U1 of TCL2543 is connected with the pin P0.3 electric wire of single-chip microcomputer;

No. 3 models are that the port I/O CLOCK of the modulus conversion chip U1 of TCL2543 is connected with the pin P0.5 electric wire of the single-chip microcomputer in ECU (Electrical Control Unit), No. 3 models are that the port DATA INPUT of the modulus conversion chip U1 of TCL2543 is connected with the pin P0.6 electric wire of the single-chip microcomputer in ECU (Electrical Control Unit), and No. 3 models are that the port DATA OUT of the modulus conversion chip U1 of TCL2543 is connected with the pin P0.7 electric wire of single-chip microcomputer.

3. be set to early warning system in car according to according to claim 1 based on pressure sensing child, it is characterized in that, described ECU (Electrical Control Unit) power module comprises switching mode voltage stabilizing chip U11, diode IN5822, electric capacity C15, C16, inductance L 1;

The vehicle power electric wire that port Vin and the output valve of switching mode voltage stabilizing chip U11 are+12V is connected, the port OUTPUT of switching mode voltage stabilizing chip U11 is connected with diode IN5822 electric wire, be connected with one end electric wire of inductance L 1 simultaneously, the other end of diode IN5822 is connected also ground connection simultaneously with the negative pole end of electric capacity C16, the port GND of switching mode voltage stabilizing chip U11 is connected with the negative pole end electric wire of electric capacity C15 and simultaneously ground connection, positive terminal and the output valve of electric capacity C15 are that the vehicle power electric wire of+12V is connected, the port FEEDBACK of switching mode voltage stabilizing chip U11 with and the positive terminal of electric capacity C16, the other end electric wire of inductance L 1 is connected also as the output terminal of+5V voltage, the port ON/OFF ground connection of switching mode voltage stabilizing chip U11.

4. be set to early warning system in car according to according to claim 1 based on pressure sensing child, it is characterized in that, described child is set to detecting unit in car and comprises 9 pressure transducer U3, No. 1 signal amplification circuit;

The structure of 9 described pressure transducer U3 is identical, all adopts tekscan the sensor of Sensors A201, every 3 pressure transducer U3 be one group of shape triangular in shape be arranged on a seat of automobile rear dispersedly, 3 pressure transducer U3 of first group are called No. 1 pressure transducer U3, No. 2 pressure transducer U3, No. 3 pressure transducer U3; 2nd group is called No. 4 pressure transducer U3, No. 5 pressure transducer U3, No. 6 pressure transducer U3, No. 7 pressure transducer U3, No. 8 pressure transducer U3 and No. 9 pressure transducer U3 with 6 pressure transducer U3 of the 3rd group;

No. 1 described signal amplification circuit by No. 1 pressure sensor circuit, No. 2 pressure sensor circuits, No. 3 pressure sensor circuit ... form with No. 9 pressure sensor circuits, No. 1 pressure sensor circuit, No. 2 pressure sensor circuits, No. 3 pressure sensor circuit ... identical with the structure of No. 9 pressure sensor circuits, all comprise transistor that model is MCP6004-E/P, charge pump U5, electric capacity C3, electric capacity C4 and electric capacity C5 that voltage stabilizing diode that variable resistor RF, model are IN4370, model are TPS60400;

Model is that the cathode voltage input port 2 of the transistor of MCP6004-E/P is connected with a port electric wire of No. 1 pressure transducer U3, model is that the cathode voltage input port 3 of the transistor of MCP6004-E/P is connected with earth terminal GND electric wire, model is that the cathode voltage input port 2 of the transistor of MCP6004-E/P is connected with one end electric wire of variable resistor RF, the other end and the model of variable resistor RF are that voltage output end mouth 1 electric wire of the transistor of MCP6004-E/P is connected, another port and the model of No. 1 pressure transducer U3 are that one end electric wire of the voltage stabilizing diode of IN4370 is connected, and output port 1 electric wire that the other end and model that model is the voltage stabilizing diode of IN4370 are the charge pump U5 of TPS60400 is connected, be connected with the positive terminal electric wire of the electric capacity C3 of one end ground connection simultaneously, model is that the direct supply electric wire that input port 2 and the output valve of the charge pump U5 of TPS60400 is 5V is connected, be connected with the positive terminal electric wire of the electric capacity C4 of one end ground connection simultaneously, model is that the port 4 of the charge pump U5 of TPS60400 is connected with earth terminal GND electric wire, model is that the port 5 of the charge pump U5 of TPS60400 is connected with self port 3 electric wire after electric capacity C5, model is that the input port AIN0 electric wire that voltage output end mouth 1 and No. 1 model of the transistor of MCP6004-E/P is the modulus conversion chip U1 of TCL2543 is connected, namely No. 1 pressure sensor circuit is formed,

No. 2 pressure sensor circuits, No. 3 pressure sensor circuits and the 2nd group and No. 4 pressure sensor circuits of the 3rd group, No. 5 pressure sensor circuits, No. 6 pressure sensor circuits and No. 7 pressure sensor circuits, No. 8 pressure sensor circuits, No. 9 pressure sensor circuits are connected into respectively by above-mentioned the same manner.

5. be set to early warning system in car according to according to claim 1 based on pressure sensing child, it is characterized in that, described child is set to detecting unit in car and also comprises Thermoelectric Infrared Sensor U8 and No. 2 signal amplification circuit;

No. 2 signal amplification circuits comprise NPN triode Q3, resistance R3, resistance R4, electric capacity C6, the electric capacity C7 that model is s8050;

Input port 3 and the output valve of Thermoelectric Infrared Sensor U8 are that the direct supply VCC electric wire of 5V is connected, the base stage electric wire that the input port 2 of Thermoelectric Infrared Sensor U8 is the NPN triode Q3 of s8050 with one end of resistance R4 and model through electric capacity C7 while is connected, the other end of resistance R4 is that the direct supply VCC of 5V is connected with one end electric wire of resistance R3 with output valve simultaneously, and the analog input channel CH1 electric wire that the other end of resistance R3 is the modulus conversion chip U7 of ADC0832 through electric capacity C6 and the model in ECU (Electrical Control Unit) is connected; Model is that the collector electric wire of the NPN triode Q3 of s8050 is connected between resistance R3 and electric capacity C6, and model is that the emitter of the NPN triode Q3 of s8050 is connected with earth terminal GND electric wire.

6. be set to early warning system in car according to according to claim 1 based on pressure sensing child, it is characterized in that, No. 3 described signal amplification circuits comprise NPN triode Q1, the resistance R1 that model is s8050;

Model is the grounded emitter of the NPN triode Q1 of s8050, model is that the base stage of NPN triode Q1 of s8050 is connected with one end electric wire of resistance R1, the other end of resistance R1 is connected with the pin P1.5 electric wire of the single-chip microcomputer in ECU (Electrical Control Unit), model is that the collector of NPN triode Q1 of s8050 is connected with one end electric wire of hummer U4, and the other end of hummer U4 is connected with the positive electrical wire of 5V direct supply.

7. be set to early warning system in car according to according to claim 1 based on pressure sensing child, it is characterized in that, No. 4 described signal amplification circuits comprise the NPN triode Q4 that model is s8050, resistance R5, resistance R6, resistance R7, resistance R8, resistance R9, resistance R10, resistance R11, resistance R12, resistance R13, electric capacity C8, electric capacity C9, electric capacity C10, electric capacity C11, electric capacity C12, electric capacity C13, electric capacity C14, LED 1;

Model is the pin 1 of the dialer module U9 of TC35i, pin 2, pin 3, pin 4, the pin 5 electrochemical capacitor C8 afterwards together and after parallel connection in parallel, electrochemical capacitor C9, electrochemical capacitor C10, electrochemical capacitor C11, electrochemical capacitor C12, the positive electrical wire of electrochemical capacitor C13 connects, electrochemical capacitor C8, electrochemical capacitor C9, electrochemical capacitor C10, electrochemical capacitor C11, electrochemical capacitor C12, the negative electrical wire of electrochemical capacitor C13 connects, the negative pole end ground connection of electric capacity C13, be connected with one end electric wire of resistance R5 as the positive terminal of electrochemical capacitor group simultaneously, the other end and the output valve of resistance R5 are that the direct supply VCC electric wire of 5V is connected, model is the pin 6 of the dialer module U9 of TC35i, pin 7, pin 8, pin 9, be connected and ground connection with the negative pole end electric wire of electric capacity C13 after pin 10 is in parallel, model is that the pin 15 of the dialer module U9 of TC35i is connected with one end electric wire of resistance R6 and resistance R9 simultaneously, resistance R9 other end ground connection, model is that the pin 19 of the dialer module U9 of TC35i is connected with resistance R10 with resistance R7 simultaneously, resistance R10 other end ground connection, model is that the pin 20 of the dialer module U9 of TC35i is connected with single-chip microcomputer pin P2.1 electric wire, model is that the pin 21 of the dialer module U9 of TC35i is connected with resistance R8 and resistance R11 electric wire simultaneously, resistance R11 other end ground connection, model is that the pin 24 of the dialer module U9 of TC35i is connected with the port 2 i.e. port VCC electric wire of common SIM cards U10 with after pin 28 parallel connection, model is that the pin 25 of the dialer module U9 of TC35i is connected with port 4 electric wire of common SIM cards U10, model is that the pin 26 of the dialer module U9 of TC35i is connected with port 5 electric wire of common SIM cards U10, model is that the pin 27 of the dialer module U9 of TC35i is connected with port 6 electric wire of common SIM cards U10, model is that the pin 29 of the dialer module U9 of TC35i is connected with the port one electric wire of common SIM cards U10, model is that the pin 32 of the dialer module U9 of TC35i is connected with resistance R13 one end electric wire, the other end and the model of resistance R13 are that the base stage electric wire of the triode Q4 of NPN is connected, the negative pole end ground connection of electric capacity C14, positive terminal is connected with port 2 electric wire of common SIM cards U10, model is the grounded emitter of the triode Q4 of NPN, and collector is connected with the negative pole of diode (LED) 1, and the positive pole of diode (LED) 1 is connected with one end electric wire of resistance R12, and the other end and the output valve of resistance R12 are that the direct supply VCC electric wire of 5V is connected.

8. be set to early warning system in car according to according to claim 1 based on pressure sensing child, it is characterized in that, No. 5 described signal amplification circuits comprise NPN triode Q2, the resistance R2 that model is s8050;

Model is the grounded emitter of the NPN triode Q2 of s8050, base stage is connected with one end electric wire of resistance R2, the other end of resistance R2 is connected with the pin P2.3 electric wire of the single-chip microcomputer in ECU (Electrical Control Unit), model is that the collector electric wire that diode and the one end after relay U6 parallel connection and the model of IN4148 is the triode Q2 of NPN is connected, model is that the diode of IN4148 is connected with the direct supply electric wire of+12V with the other end after relay U6 parallel connection, relay U6 one end is connected with the direct supply electric wire of+12V, the other end of relay U6 is connected with one end electric wire of two twinkle SM signal lamp Light, two twinkle SM signal lamp Light other end ground connection.