CN201828310U - Tank-cover type fuel oil quantity tracker for engineering vehicle - Google Patents

Abstract

The utility model relates to a tank-cover type fuel oil quantity tracker for an engineering vehicle. At present, a fuel oil quantity detecting device of the vehicle can not realize the uninterrupted supervision on the using condition of fuel oil quantity. The tank-cover type fuel oil quantity tracker comprises a single-chip microcomputer, a temperature sensing module, a clock module, a memory module, a power module, an ultrasonic wave transmitting-receiving module and an infrared data transmission module. The power module supplies power to the single-chip microcomputer, the temperature sensing module and the ultrasonic wave transmitting-receiving module respectively; the ultrasonic wave transmitting-receiving module is connected with an I/O (inlet/outlet) of the single-chip microcomputer; the clock module provides real-time clock information for the single-chip microcomputer; the memory module exchanges data with the single-chip microcomputer through a data port; the signal output end of the temperature sensing module is connected with the I/O of the single-chip microcomputer; and an infrared data transmission circuit exchanges data with the single-chip microcomputer through the data port. The tank-cover type fuel oil quantity tracker can realize the real-time monitoring on the using condition of the fuel oil of the engineering vehicle for long time.

Description

Engineering truck box lid type oil mass tracker

Technical field

The utility model belongs to the technology of instrument and meter field, relates to a kind of instrument that is used for engineering truck fuel tank Fuel Oil Remaining record.

Background technology

Along with the embedded microprocessor technology rapid development, level gauging instrument such as oil mass progressively develop to electromechanical integration from mechanical hook-ups such as early stage employing ball floats.The technology trend of level gauging instrument development both at home and abroad mainly contains following three aspects: intellectuality, contactless and miniaturization.In the liquid level gauge of non-contact measurement, a lot of liquid level gauges based on the different measuring principle are arranged: radar level gauge, laser liquid level gauge, gamma-rays liquid level instrument, ultrasonic liquid leveller etc.Wherein, ultrasonic liquid leveller is to develop the most a kind of technology at present, has comprehensive advantage at aspects such as technology, cost, precision, installations.This technology is based on the aerial velocity of propagation of ultrasound wave and run into the principle that the test solution site surface produces reflection, the ultrasonic transducer emission required time of ultrasonic pulse signal, has just represented the distance between medium and the ultrasonic transducer.The oil mass pick-up unit of vehicle generally is built in the vehicle inner oil tube at present, carry out real-time fuel consumption by the oil mass testing agency of flowing through oil pipe and calculate, and then the feedback measured value is to control desk.This oil mass pick-up unit has just been closed after vehicle stops to start, can't realize the oil mass operating position do not interrupt the supervision.

Summary of the invention

The utility model is at the deficiencies in the prior art, a kind of engineering truck box lid type oil mass tracker is provided, this tracker is built in the case lid of fuel tank, the long-term fuel oil operating position of monitoring works vehicle in real time, the fuel oil operating position of real-time monitoring works vehicle, can be used for the oil mass supervision of engineering truck, prevent and treat malice stolen incident.

The utility model is to handle core with the low-power scm, adopt the non-contact type ultrasonic ranging technology regularly to measure the oil tank liquid level height, according to the fuel oil amount of expending of the fuel tank volume computation model that sets in advance statistics day part, and with the oil tank liquid level data storage in local E ²Prom memory.This tracker also has the infrared data transfer function, after using a time cycle, the engineering truck supervisor can gather engineering truck box lid type oil mass tracker stored history by the over the horizon communication system of hand-held PDA, and can import Computer Database and carry out statistical study, monitor fuel oil operating position in time cycle of a plurality of engineering trucks with visual means, prevent and treat malice stolen incident.

The utility model comprises single-chip microcomputer, temperature sensing module, clock module, memory module, power module, ultrasonic emitting receiver module and infrared data transport module.

Described power module comprises 3V power supply and 4.5V power supply, and described 3V power supply is powered to single-chip microcomputer, and described 4.5V power supply is given the power supply of temperature sensing module and ultrasonic emitting receiver module respectively.

The data sending terminal of described ultrasonic emitting receiver module, data receiver, mode of operation control end are connected with the single-chip processor i/o mouth respectively.

Described clock module provides real-time clock information for single-chip microcomputer.

Described memory module is by data port and single-chip microcomputer swap data.

The signal place output terminal of described temperature sensing module is connected with the single-chip processor i/o mouth.

Described infrared data transmission circuit is by data port and single-chip microcomputer swap data.

The utility model can solve the problem that existing oil mass pick-up unit can't round-the-clock long-term detection vehicle amount of fuel, adopts the mode that is independent of vehicle electric control and fuel delivery system, can realize for a long time the fuel oil operating position of monitoring works vehicle in real time.

Description of drawings

Fig. 1 is a structural representation of the present utility model;

Fig. 2 is single-chip microcomputer and peripheral circuit diagram thereof;

Fig. 3 is a ultrasound emission receiver module circuit diagram;

Fig. 4 is the clock module circuit diagram;

Fig. 5 is the memory module circuit diagram;

Fig. 6 is an infrared data transport module circuit diagram;

Fig. 7 is the temperature sensing module circuit diagram.

Embodiment

The utility model is described in further detail below in conjunction with accompanying drawing.

As shown in Figure 1, engineering truck box lid type oil mass tracker comprises single-chip microcomputer 5, temperature sensing module 1, clock module 2, memory module 6, power module 3, ultrasonic emitting receiver module 4 and infrared data transport module 7.

Power module 3 can be by three joint 1.5V dry cell series-feds, and the 4.5V power supply offers temperature sensing module 1 and ultrasonic emitting receiver module 4, and the 3V power supply offers single-chip microcomputer 5 and other peripheries.

As shown in Figure 2, this tracker serves as to handle core with low-power scm IC1 chip, and the IC1 chip in the present embodiment is selected MSP430F149 for use.The pin one of IC1 chip connects 3V supply voltage VCC, the pin two of IC1 chip connects the voltage output of temperature sensor LM35, the pin one 2 of IC1 chip, 13 connect Trig and the ECHO of ultrasound emission receiver module IC7 respectively, the pin one 4 of IC1 chip connects the interruption output IRQ of infrared codec chip IC2, the pin one 5 of IC1 chip connects the interruption output INT of clock chip PCF8563, the pin two 8 of IC1 chip, 29,30,31 connect the SPI data input and output CS of infrared codec chip IC2 respectively, SOMI, SIMO, SCLK, the pin 33 of IC1 chip, 34 connect E respectively ²The I of PROM chip IC 6 ²C data-interface EEP_SDA, EEP_SCL, the pin 36,38,39,40 of IC1 chip connects E respectively ²The ground connection control of the ground connection control of PROM chip IC 6, the ground connection control of temperature sensor IC8, ultrasound emission receiver module IC7, the ground connection control of infrared receiving/transmission joint IC4, the pin 44,45 of IC1 chip connects the I of clock chip IC5 respectively ²The output of C data SDA, SCL, the pin 52,53 of IC1 chip connects the two ends of 8M crystal oscillator, the pin 54,55,56,57,58 of IC1 chip connects JTAG and downloads joint IC9, and the pin 64 that the pin 62,63 of IC1 chip connects power supply ground, IC1 chip connects supply voltage VCC.

As shown in Figure 3, the oil tank liquid level height is measured by the ultrasound emission receiver module.Ultrasound emission receiver module IC7 is powered by 4.5V VCC4.5, the module duty is by field effect transistor control Q6 control, the conducting of field effect transistor control Q6 is by the controlled 39 pin CJ-PW that are formed on single-chip microcomputer IC1 chip, 12 pins of single-chip microcomputer IC1 chip produce the Trig pin that the square wave data send to ultrasound emission receiver module IC7, D4LED can be glittering when sending data, receives data are linked into single-chip microcomputer IC1 chip by the ECHO pin 13 pins.The resonance frequency 40KHz of supersonic sounding, working current 1mA, precision can reach 5mm, and maximum measure distance can reach 1.3m, can satisfy the level gauging of conventional fuel tank.

As shown in Figure 4, clock chip IC5 provides real-time clock information.Clock chip IC5 is powered by 3V supply voltage VCC, the OSCI of clock chip IC5 is connected 32.768K frequency crystal oscillator with the OSCO pin, SCL, SDA data output interface are drawn on the R10 resistance by R9, be connected with 44,45 pins of single-chip microcomputer IC1 chip, real-time calendar information is provided.The INT of clock chip IC5 provides timing to interrupt, and for saving power consumption, single-chip microcomputer generally is in dormant state, by clock chip IC5 timing wake-up, clock chip is in the low-power consumption time status at ordinary times, regularly produces to interrupt waking single-chip microcomputer up, and the temporal information of data recording is provided simultaneously.

As shown in Figure 5, E ² PROM chip IC 6 provides the storage of liquid level data, power by 3V supply voltage VCC, the chip operation state is by field effect transistor control Q5 control, the conducting of field effect transistor control Q5 is by the controlled 36 pin EEP-PW that are formed on single-chip microcomputer IC1 chip, SCL, SDA data output interface are by R9, draw on the R10 resistance, be connected with 33,34 pins of single-chip microcomputer IC1 chip.E ²The data storage field of PROM chip IC 6 comprises clock information and level height, and adopting 4 bytes is a unit, 2 byte representation times, 2 byte representation height, the 64KB storage space can be provided, and by tests in per 10 minutes frequency computation part once, maximum can provide 3 months data capacity.

As shown in Figure 6, infrared codec chip IC2, phase inverter chip IC 3, infrared receiving/transmission joint IC4 form the infrared data transport module jointly.Infrared codec chip IC2, phase inverter chip IC 3, infrared receiving/transmission joint IC4 are powered by 3V supply voltage VCC, the low-power consumption mode of infrared codec chip IC2 is controlled by the SHDN pin, SHDN connects 42 pins of single-chip microcomputer IC1 chip, infrared receiving/transmission joint IC4 duty is by field effect transistor control Q1 control, and the conducting of field effect transistor control Q1 is by the controlled 40 pin RT-PW that are formed on single-chip microcomputer IC1 chip.The X1 of infrared codec chip IC2 is connected the 1.8432M crystal oscillator with X2, interrupt interface IRQ is connected with 14 pins of single-chip microcomputer IC1 chip, when infrared data receives, produce and interrupt, the DIN of infrared codec chip IC2, DOUT, SCLK and CS data-interface are connected with 28,29,30,31 pins of single-chip microcomputer IC1 chip, realize the SPI interface transmission of infrared data.Data-interface TX, the RX of infrared codec chip IC2 is connected with Y with the A of phase inverter chip IC 3, and phase inverter chip IC 3 output TXD are connected with TXD, the RXD of infrared receiving/transmission joint IC4 with RXD, realize the data acquisition transmission of infrared mode.Utilize the over the horizon communication system of hand-held PDA, can gather the historical oil mass data of engineering truck box lid type oil mass tracker.

As shown in Figure 7, temperature sensor IC8 provides the reference temperature of temperature correction.Temperature sensor IC8 provides aanalogvoltage output TEM by 4.5V VCC4.5 power supply, and voltage output TEM is connected with the pin two of single-chip microcomputer IC1 chip, carries out the A/D data acquisition.Temperature sensor IC8 duty is by field effect transistor control Q2 control, and the conducting of field effect transistor control Q2 is by the controlled 38 pin TEM-PW that are formed on single-chip microcomputer IC1 chip.

Engineering truck box lid type oil mass tracker workflow is as follows:

Wait for the timing of clock chip IC5, timing arrives, and clock chip IC5 produces look-at-me, wakes single-chip microcomputer IC1 chip up, and single-chip microcomputer IC1 chip wakes SHDN, phase inverter chip IC 3, infrared receiving/transmission joint IC4, the E of infrared codec chip IC2 up ² PROM chip IC 6, ultrasound emission receiver module IC7, temperature sensor IC8.Single-chip microcomputer IC1 chip produces the pulse of 40KHz, sends to ultrasound emission receiver module IC7, carries out level gauging; Wait for the received signal of ultrasound emission receiver module IC7, launch time of reception and calculate.The voltage data of single-chip microcomputer IC1 chip reading temperature sensor IC8 carries out the A/D conversion Calculation and goes out temperature data, revises the velocity of sound under warm the floating, and carries out liquid level and calculates.Single-chip microcomputer IC1 chip carries out repeatedly level gauging, the rejecting abnormalities value, and the mean value of getting measurement result is as final measurement.Single-chip microcomputer IC1 chip reads the temporal information of clock chip IC5, and temporal information and final measurement are formed a record field, stores E into ²PROM chip IC 6.After storage finished, single-chip microcomputer IC1 chip was closed SHDN, phase inverter chip IC 3, infrared receiving/transmission joint IC4, the E of infrared codec chip IC2 ² PROM chip IC 6, ultrasound emission receiver module IC7, temperature sensor IC8, single-chip microcomputer IC1 chip enters dormancy then.

The utility model is designed to the toroidal with the fuel tank cap coupling, in the fuel tank cap that is placed in, and fills antiexplosion adhesive.Be provided with between the VCC pin of ultrasound emission receiver module IC7 and the VCC4.5 power supply and close up the button switch, ultrasound emission receiver module IC7 power supply is closed up button control by fuel tank cap, when fuel tank cap is opened, closes up button and is opened, supersonic sounding is not subjected to electricity, and level gauging is not worked; When fuel tank cap is closed up, close up button and closed, ultrasound emission receiver module IC7 is subjected to electricity, carries out level gauging.Because when fuel tank cap was opened, the data that the oil mass tracker is measured were meaningless, run the pass jointly so between fuel tank and case lid, be provided with to twist, be used to prevent empty the measurement.Because the fuel tank cap lubrication hole has certain degree of tilt, thus this tracker put the degree of tilt that in fuel tank cap, will finish correct measurement and vertical direction must be less than about 15 °.

Index of the present utility model is as follows:

1, can measure the depth capacity 1.3m of oil tank liquid level;

2, E ²3 months maximum times of PROM data storage;

3, the dormancy working current is less than 0.1mA;

4, three joint 1.5V dry cells can reach 3 months service time;

5, infrared data transmission flank speed 115200bps;

6, infrared data transmission ultimate range 1.5m.

Claims (1)

1. engineering truck box lid type oil mass tracker comprises single-chip microcomputer, temperature sensing module, clock module, memory module, power module, ultrasonic emitting receiver module and infrared data transport module, it is characterized in that:

Described power module comprises 3V power supply and 4.5V power supply, and described 3V power supply is powered to single-chip microcomputer, and described 4.5V power supply is given the power supply of temperature sensing module and ultrasonic emitting receiver module respectively;

The data sending terminal of described ultrasonic emitting receiver module, data receiver, mode of operation control end are connected with the single-chip processor i/o mouth respectively;

Described clock module provides real-time clock information for single-chip microcomputer;

Described memory module is by data port and single-chip microcomputer swap data;

The signal place output terminal of described temperature sensing module is connected with the single-chip processor i/o mouth;

Described infrared data transmission circuit is by data port and single-chip microcomputer swap data.

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