CN102610007B - Engineering truck data logger - Google Patents
Engineering truck data logger Download PDFInfo
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- CN102610007B CN102610007B CN201110456979.XA CN201110456979A CN102610007B CN 102610007 B CN102610007 B CN 102610007B CN 201110456979 A CN201110456979 A CN 201110456979A CN 102610007 B CN102610007 B CN 102610007B
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Abstract
The invention discloses a kind of engineering truck data logger, comprise MCU module, real-time clock unit, memory cell and power module, wherein, described MCU module is connected with a CAN transceiver, the 2nd CAN transceiver, temperature control unit by internal data bus; Be connected with RS485 serial ports unit, RS232 serial ports unit by universal serial bus. Engineering truck data logger provided by the invention, is connected multiple peripheral hardware, thereby multiple communication interface is provided and improves antijamming capability with universal serial bus by internal data bus. In addition, the present invention, by the circuit of power module and CAN transceiver is improved, further improves antijamming capability, ensures recorder reliably working.
Description
Technical field
The present invention relates to a kind of data logger, relate in particular to a kind of engineering truck data logger.
Background technology
Engineering truck data logger (hereinafter to be referred as data logger) is made up of data logger terminal and DAS,Data logger is connected to CAN bus on the control bus of engineering truck, according to the ID note of the time interval of setting and appointmentRecord data. In the time that accident occurs or needs, connect computer by the USB mouth of data logger, record data are read in to calculatingMachine is also preserved. Custom-designed DAS, can reproduce running status, operational factor, failure logging of vehicle etc.
Existing engineering truck data logger generally exists interface single, there is no CAN interface; Anti-interference, shock resistance and antidetonationPerformance is not high and memory capacity is less than normal, effectively memory time short shortcoming. Therefore, be necessary engineering truck data loggerImprove.
Summary of the invention
Technical problem to be solved by this invention is to provide a kind of engineering truck data logger, multiple communication interface is provided and improvesAntijamming capability.
The present invention solves the problems of the technologies described above the technical scheme adopting to be to provide a kind of engineering truck data logger, comprisesMCU module, real-time clock unit, memory cell and power module, wherein, described MCU module by internal data bus andThe one CAN transceiver, the 2nd CAN transceiver, temperature control unit are connected; By universal serial bus and RS485 serial ports unit,RS232 serial ports unit is connected.
Above-mentioned engineering truck data logger, wherein, described power module comprises that successively connected first order voltage transforms chipTransform chip with second level voltage, the input voltage that described first order voltage transforms chip is 24V, and output voltage is 5V, instituteThe input voltage of stating second level voltage conversion chip is 5V, and output voltage is 3.3V or 1.8V; Described second level voltage transformsThe voltage output end of chip is connected with voltage detection unit; Described voltage detection unit comprises voltage comparator U5A, and serial connection is connectedBenchmark pressure resistance R 5, R6, be connected in series connected sampled voltage resistance R 7, R8; The output of described voltage comparator U5ABe connected with sampled voltage resistance R 7, R8 by current-limiting resistance R16; In electrode input end and benchmark pressure resistance R 5, R6Between end be connected; Negative input is connected with the intermediate ends of sampled voltage resistance R 7, R8; Power positive end and second level voltage turnThe voltage output end of changing chip is connected; Power-is extremely connected with 24V power supply by benchmark pressure resistance R 5, R6.
Above-mentioned engineering truck data logger, wherein, a described CAN transceiver, the 2nd CAN transceiver comprise inputRXD, TXD, power end VCC and output CANH, CANL, cross-over connection resistance R 17 between described output CANH and CANL,Described power end VCC is by filter capacitor C27 ground connection.
Above-mentioned engineering truck data logger, wherein, described memory cell comprises ram memory cell and Flash memory cell.
Above-mentioned engineering truck data logger, wherein, described MCU module is LPC2119.
The present invention contrasts prior art following beneficial effect: engineering truck data logger provided by the invention, and by insideData/address bus is connected multiple peripheral hardware with universal serial bus, thereby multiple communication interface is provided and improves antijamming capability. In addition, originallyInvention, by the circuit of power module and CAN transceiver is improved, further improves antijamming capability, ensures recorderReliably working.
Brief description of the drawings
Fig. 1 is engineering truck data record instrument circuit block diagram of the present invention;
Fig. 2 is the power module block diagram of engineering truck data logger of the present invention;
Fig. 3 is the voltage detection unit circuit diagram of engineering truck data logger of the present invention;
Fig. 4 is the CAN transceiver end pin connection diagram of engineering truck data logger of the present invention.
In figure:
1MCU module 2 CAN transceiver 3 a 2nd CAN transceiver
4RS485 serial ports unit 5 temperature control unit 6 power modules
7 8RS232 serial ports unit, real-time clock unit 9RAM memory cell
10Flash memory cell 11 first order voltages transform chip 12 second level voltages and transform chip
13 voltage detection units
Detailed description of the invention
Below in conjunction with drawings and Examples, the invention will be further described.
Fig. 1 is engineering truck data record instrument circuit block diagram of the present invention.
Refer to Fig. 1, engineering truck data logger provided by the invention comprises MCU module 1, real-time clock unit 7, storageUnit and power module 6, wherein, described MCU module 1 is by internal data bus and a CAN transceiver, the 2nd CANTransceiver 3, temperature control unit 5 are connected; By universal serial bus and RS485 serial ports unit 4, RS232 serial ports unit 8 phasesConnect. Described memory cell comprises ram memory cell 9 and Flash memory cell 10; Described MCU module 1 can be selected LPC2119,Temperature control unit 5 can be selected DS18B20.
Fig. 2 is the power module block diagram of engineering truck data logger of the present invention; Fig. 3 is engineering truck data note of the present inventionThe voltage detection unit circuit diagram of record instrument.
Please continue referring to Fig. 2 and Fig. 3, in order further to improve the antijamming capability of engineering truck data logger, wherein, described inPower module 6 comprises that successively connected first order voltage transforms chip 11 and second level voltage transforms chip 12, first order voltageTransform chip 11 and can select LM2576, second level voltage transforms chip 12 can select SP117; Described first order voltage transformsThe input voltage of chip 11 is 24V, and output voltage is 5V, and the input voltage that described second level voltage transforms chip 12 is 5V,Output voltage is 3.3V or 1.8V; Described second level voltage transforms voltage output end and the voltage detection unit 13 of chip 12Be connected; Described voltage detection unit 13 comprises voltage comparator U5A, is connected in series connected benchmark pressure resistance R 5, R6, serial connectionConnected sampled voltage resistance R 7, R8; The output of described voltage comparator U5A is by current-limiting resistance R16 and sampled voltageResistance R 7, R8 are connected; Electrode input end is connected with the intermediate ends of benchmark pressure resistance R 5, R6; Negative input and samplingThe intermediate ends of voltage resistance R7, R8 is connected; Positive source (end pin 8) and the second level voltage of voltage comparator U5A transformThe voltage output end of chip 12 is connected; The power cathode of voltage comparator U5A (end pin 4) by benchmark pressure resistance R 5,R6 is connected with 24V power supply. The negative electrode (1 pin) of protection diode U6 connects in the middle of R5, R6, and and voltage comparator U5AElectrode input end be connected, protection diode anode (2 pin) connects the negative input of voltage comparator U5A, protection diodeEarth terminal (3 pin) ground connection.
Fig. 4 is the CAN transceiver end pin connection diagram of engineering truck data logger of the present invention.
Please continue referring to Fig. 4, in order to improve the antijamming capability of CAN transceiver, wherein, a described CAN transceiver 2,The 2nd CAN transceiver 3 comprises input RXD, TXD, power end VCC and output CANH, CANL, described output CANHAnd cross-over connection resistance R 17 between CANL, described power end VCC is by filter capacitor C27 ground connection; The one CAN transceiver 2,The 2nd CAN transceiver 3 can be selected CTM8251T.
Although the present invention discloses as above with preferred embodiment, so it is not in order to limit the present invention, any art technology peopleMember, without departing from the spirit and scope of the present invention, when making a little amendment and perfect, therefore protection scope of the present inventionWhen with being as the criterion that claims were defined.
Claims (4)
1. an engineering truck data logger, comprises MCU module (1), real-time clock unit (7), memory cell and electricitySource module (6), is characterized in that, described MCU module (1) by internal data bus and a CAN transceiver (2),The 2nd CAN transceiver (3), temperature control unit (5) are connected; By universal serial bus and RS485 serial ports unit (4),RS232 serial ports unit (8) is connected, and described power module (6) comprises that successively connected first order voltage transforms chip (11)Transform chip (12) with second level voltage, the input voltage that described first order voltage transforms chip (11) is 24V, output electricityPress as 5V, the input voltage that described second level voltage transforms chip (12) is 5V, and output voltage is 3.3V or 1.8V; InstituteThe voltage output end of stating second level voltage conversion chip (12) is connected with voltage detection unit (13); Described voltage detecting listUnit (13) comprises voltage comparator U5A, is connected in series connected benchmark pressure resistance R 5, R6, is connected in series connected sampled voltage electricityResistance R7, R8; The output of described voltage comparator U5A is by current-limiting resistance R16 and sampled voltage resistance R 7, R8 phaseConnect; Electrode input end is connected with the intermediate ends of benchmark pressure resistance R 5, R6; Negative input and sampled voltage resistance R 7,The intermediate ends of R8 is connected; Power positive end is connected with the voltage output end that second level voltage transforms chip (12); Power cathodeEnd is connected with 24V power supply by benchmark pressure resistance R 5, R6.
2. engineering truck data logger as claimed in claim 1, is characterized in that, a described CAN transceiver (2),The 2nd CAN transceiver (3) comprises input RXD, TXD, power end VCC and output CANH, CANL,Cross-over connection resistance R 17 between described output CANH and CANL, described power end VCC is by filter capacitor C27 ground connection.
3. engineering truck data logger as claimed in claim 1 or 2, is characterized in that, described memory cell comprises RAMMemory cell (9) and Flash memory cell (10).
4. engineering truck data logger as claimed in claim 1 or 2, is characterized in that, described MCU module (1) isLPC2119。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110456979.XA CN102610007B (en) | 2011-12-27 | 2011-12-27 | Engineering truck data logger |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110456979.XA CN102610007B (en) | 2011-12-27 | 2011-12-27 | Engineering truck data logger |
Publications (2)
| Publication Number | Publication Date |
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| CN102610007A CN102610007A (en) | 2012-07-25 |
| CN102610007B true CN102610007B (en) | 2016-05-18 |
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| CN201110456979.XA Active CN102610007B (en) | 2011-12-27 | 2011-12-27 | Engineering truck data logger |
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Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101118658A (en) * | 2007-09-12 | 2008-02-06 | 吉林大学 | CAN bus instrument vehicle controlling information processing method for mixed power passenger car |
| CN201216814Y (en) * | 2008-03-21 | 2009-04-08 | 吴少红 | Balance recuperating instrument |
| CN101256684B (en) * | 2008-03-31 | 2010-06-16 | 重庆大学 | Vehicle information recorder of hybrid power vehicle |
| CN201218959Y (en) * | 2008-07-14 | 2009-04-08 | 上海派芬自动控制技术有限公司 | CAN bus data-logging equipment |
| US8086368B2 (en) * | 2009-01-06 | 2011-12-27 | Bosch Security Systems Inc. | Variable function communication gateway for vehicles |
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