CN102230807B - Odometer calibrating device - Google Patents
Odometer calibrating device Download PDFInfo
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- CN102230807B CN102230807B CN2011101943786A CN201110194378A CN102230807B CN 102230807 B CN102230807 B CN 102230807B CN 2011101943786 A CN2011101943786 A CN 2011101943786A CN 201110194378 A CN201110194378 A CN 201110194378A CN 102230807 B CN102230807 B CN 102230807B
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Abstract
The invention discloses an odometer calibrating device. A control box comprises a DSP (Digital Signal Processing) control module and an input/output terminal, wherein a code disk with a magnetic steel sheet is positioned on a rotary shaft of a stepping motor and is driven to rotate by the rotary shaft; a hall sensor is positioned beside the code disk with the magnetic steel sheet, is connected with the DSP control module and is used for transmitting a low-level pulse signal generated by a hall effect to the DSP control module; the DSP control module is connected with the stepping motor through a motor driver and is used for controlling the rotation of the stepping motor; and the DSP control module is connected with the input/output terminal. The odometer calibrating device can be used for driving a vehicle odometer to rotate at a required running speed in a specified running speed range according to the transmission ratio of a vehicle output shaft, recording the running speed, calculating the road haul and verifying the functional accuracies of the vehicle odometer and a vehicle-mounted inertia positioning and orientating navigation device odometer.
Description
Technical field
The present invention relates to a kind of measurement calibration equipment, particularly a kind of odometer calibration equipment.
Background technology
Along with Chinese economic development, various vehicles are widely used in our life, the accuracy that therefore just needs a kind of pick-up unit to come verification vehicle odometer.
Document " the practical odometer pick-up unit design of Vehicular system " (Du Xinni; High-strength. experimental technique and management; 2006; 23 (6): 37 ~ 39) introduced a kind of Vehicular system odometer pick-up unit design based on the AT89C51 single-chip microcomputer, this device is made up of motor-drive circuit, mileage display circuit, keyboard scanning circuit, sensor circuit.Its deficiency is: 1) dominant frequency of AT89C51 SCM system is 12MHz, and processing speed is slow, and the travel speed scope that can accurately measure is little; 2) adopt LED display circuit and membrane keyboard, and laser-emitting diode and membrane keyboard damage easily all, and its periphery circuit design is complicated, needs 82C79,7404,7448,74154, numerous chips formation keyboard scans and LED display circuits such as 74245; 3) adopt same step angle when motor low speed, high speed rotating, if adopt less step angle then can't meet the requirements of maximum speed, if speed error is bigger when adopting bigger step angle then to slowly run; 4) adopt the dip chip, circuit board is oversize.
In a word, odometer pick-up unit of the prior art can not satisfy in the reality demand that vehicle odometer or vehicle-mounted inertial positioning directed navigation device odometer are measured.
Summary of the invention
The technical matters that the present invention solved is to provide a kind of odometer calibration equipment, can well verification vehicle odometer and the accuracy of vehicle-mounted inertial positioning directed navigation device odometer function.
The technical solution that realizes the object of the invention is: a kind of odometer calibration equipment; Comprise drive unit and control box; Said drive unit comprises stepper motor, motor driver, has the code-disc of magnetic links, Hall element, and said control box comprises DSP control module and input/output terminal; The code-disc that wherein has a magnetic links is positioned in the rotating shaft of stepper motor and under the drive of stepper motor, rotates; Hall element is positioned at the code-disc side that has magnetic links; This Hall element is connected with the DSP control module, will be transferred to the DSP control module through the low level pulse signal that Hall effect produces, and the DSP control module links to each other with stepper motor through motor driver; The rotation of control step motor, this DSP control module also is connected with input/output terminal.
The present invention compared with prior art, its remarkable advantage: 1) dominant frequency of dsp system is 150MHz, and processing speed is fast, each clock period is 6.67ns, therefore based on the odometer calibration equipment of DSP, the travel speed scope that can accurately measure significantly increases; 2) the odometer calibration equipment based on DSP only need be connected with preferred touch-screen through the DSP serial ports, and peripheral circuit is simplified greatly, and it shows and button operation all can be accomplished on touch-screen; 3) the segmentation number of may command motor driver is provided with the DIP switch, the switching of step angle during with realization motor low speed, high speed rotating, thus can meet the requirements of maximum speed, the rotary speed precision when having guaranteed again to slowly run; 4) dsp chip and peripheral chip thereof adopt the paster chip, make control circuit and The whole control case size significantly reduce, and are easier to carry and use in the place of limited space system.
Below in conjunction with accompanying drawing the present invention is described in further detail.
Description of drawings
Fig. 1 is the overall system design figure of odometer calibration equipment of the present invention.
Fig. 2 is motor-driven of the present invention and Hall element figure.
Fig. 3 is a dsp system power supply diagram of the present invention.
Fig. 4 is a main program flow chart.
Fig. 5 increases button interrupt service routine process flow diagram for speed.
Fig. 6 reduces button interrupt service routine process flow diagram for speed.
Fig. 7 is provided with button interrupt service routine process flow diagram for speed.
Fig. 8 is for starting button interrupt service routine process flow diagram.
Fig. 9 is switching-over button interrupt service routine process flow diagram.
Figure 10 is a mileage reset key interrupt service routine process flow diagram.
Figure 11 is the interrupt service routine process flow diagram that stops key.
Figure 12 calculates the interrupt service routine process flow diagram for mileage.
Figure 13 has the code-disc of magnetic links and the location diagram of Hall element.
The implication of label representative is among the figure: 1-magnetic links, 2-Hall element.
Embodiment
The odometer calibration equipment that the present invention designed can be according to the ratio of gear of vehicle output shaft; In the travel speed scope of regulation; Travel speed as requested drives odometer and rotates; And the record travel speed, calculate distance travelled, the correctness of verification vehicle odometer or vehicle-mounted inertial positioning directed navigation device odometer function.
In conjunction with Fig. 1, Figure 13; A kind of odometer calibration equipment of the present invention; Comprise drive unit and control box, said drive unit comprises stepper motor, motor driver, has the code-disc of magnetic links, Hall element, can the powered vehicle odometer or vehicle-mounted inertial positioning directed navigation device odometer is pressed setting speed and direction is rotated; Said control box comprises DSP control module and input/output terminal; Be used to control the odometer calibration equipment and start, stop, the control motor quickens, slows down, commutates, and shows rotating speed, mileage; The code-disc that wherein has a magnetic links is positioned in the rotating shaft of stepper motor and under the drive of stepper motor, rotates; Hall element is positioned at the code-disc side that has magnetic links; This Hall element is connected with the DSP control module, will be transferred to the DSP control module through the low level pulse signal that Hall effect produces, and the DSP control module links to each other with stepper motor through motor driver; The rotation of control step motor, this DSP control module also is connected with input/output terminal.The preferred touch-screen of said input/output terminal.
System is a core with the DSP control circuit, at first through the button on the input/output terminal (preferred touch-screen) needed speed is set, and velocity amplitude shows in the viewing area of input/output terminal in real time, starts test after setting speed.The DSP control circuit provides and enables control signal, direction control signal and pulse signal to motor driver, thus control step rotating speed of motor and rotation direction.The code-disc that has magnetic links is fixed on the rotation axis of stepper motor, and stepper motor rotates the drive code-disc and rotates synchronously.Because Hall effect; During each magnetic links process Hall element; Hall element produces a low level pulse signal triggering DSP external interrupt, calculates interrupt service routine by mileage and calculates the mileage value, and this mileage value shows in the viewing area of input/output terminal in real time.In the odometer checking procedure, can quicken, slow down according to demand, switching-over, mileage operation such as reset, stop.The DSP control circuit sends display message to input/output terminal through serial ports, and input/output terminal turns back to the DSP control circuit through serial ports with key information; The DSP control circuit provides and enables control signal, direction control signal and pulse signal to motor driver; Motor driver provides the three phase sine electric current to stepper motor; Stepper motor rotates the drive code-disc and rotates synchronously; Hall element provides the low level pulse signal to the DSP control circuit.
In order to realize measurement, need Hall element and the code-disc that has magnetic links to mileage number.Be uniform-distribution with magnetic links on the code-disc, the number of magnetic links can calculate according to the requirement of ratio of gear.The code-disc that has magnetic links is fixed on the rotation axis of stepper motor, and stepper motor drives code-disc and rotates synchronously.When magnetic links moves to the relative position of Hall element, (see Figure 13), because Hall effect, Hall element produces a low level pulse signal triggering DSP external interrupt, calculates interrupt service routine by mileage and calculates the mileage value.
The output signal SIGNALIN of Hall element after this signal is lied prostrate by the 3rd resistance R 3 current limlitings, stabilivolt D2 limit, receives the external interrupt mouth GPIOE0_XINT1 of TMS320F2812 through the 2 pin Access Control circuit boards of the first four-core plug J3.When sensor returns low level pulse signal, trigger external interrupt INT1, to calculate interrupt service routine by mileage and calculate the mileage value, the mileage value shows through the viewing area of input/output terminal.
The 92 pin GPIOA0_PWM1 of TMS320F2812,93 pin GPIOA1_PWM2,94 pin GPIOA2_ PWM3,102 pin GPIOA6_T1PWM_T1CMP are connected respectively to 21 pin B1,20 pin B2,19 pin B3, the 18 pin B4 of SN74LVC4245A, above-mentioned signal by the SN74LVC4245A chip drive, level conversion.The 3 pin A1 of SN74LVC4245A succeed the 6 pin R10 of electrical equipment RELAYG6A-274P after driving, the level conversion; What 1 pin of 4 pin A2 through the second four-core plug J4 connect stepper motor driver enables to control EN; 5 pin A3 meet the direction signal DIR of stepper motor driver through 2 pin of the second four-core plug J4, and 6 pin A4 meet the pulse signal CP of stepper motor driver through 3 pin of the second four-core plug J4.The segmentation number that the 3 pin A1 of SN74LVC4245A are used to control motor driver is provided with second of DIP switch, the real-time switching of step angle when realizing motor low speed, high speed rotating.4 pin A2 are used for the output enable signal; When driver EN termination is received the high level of 4 pin A2 transmission; Driver will the control step electric motor starting or is kept running status, if driver EN receives low level, driver will be in the non-moment state by the control step motor.5 pin A3 are used to export the forward and backward signal, and when the DIR of driver termination was received the high level of 5 pin A3 mouths transmission, driver will just change by the control step motor, if driver DIR termination receipts is low level, driver will the counter-rotating of control step motor.6 pin A4 mouths are used to export the CP pulse signal, and the CP frequency is high more, and the rotating speed of stepper motor is just high more, otherwise just low more.Through changing the frequency of CP pulse signal, just can realize the acceleration, deceleration of stepper motor.
In conjunction with Fig. 2; Said DSP control module comprises chip TMS 320 F 2812, chip SN74LVC4245A, relay R ELAYG6A-274P, the first four-core plug J3, the second four-core plug J4, the 3rd resistance R 3 and stabilivolt D2; The 1 pin ground connection of the first four-core plug J3,2 pin are inserted Hall element output signal SIGNALIN, and this pin also links to each other with 149 pin GPIOE0_XINT1 of chip TMS 320 F 2812 and the end of stabilivolt D2 through the 3rd resistance R 3; The other end ground connection of stabilivolt D2; The 3rd resistance R 3, stabilivolt D2 are to signal SIGNALIN current limliting, limit volt, and 3 pin of the first four-core plug J3 are unsettled, and 4 pin connect+5V;
92 pin GPIOA0_PWM1 of chip TMS 320 F 2812 meet the 21 pin B1 of chip SN74LVC4245A; 93 pin GPIOA1_PWM2 of chip TMS 320 F 2812 meet the 20 pin B2 of chip SN74LVC4245A; 94 pin GPIOA2_PWM3 of chip TMS 320 F 2812 meet the 19 pin B3 of chip SN74LVC4245A, and 102 pin GPIOA6_T1PWM_T1CMP of chip TMS 320 F 2812 meet the 18 pin B4 of chip SN74LVC4245A;
The 1 pin VCCA of chip SN74LVC4245A connects+5V; 2 pin DIR and 22 pin
ground connection; 3 pin A1 succeed the 6 pin R10 of electrical equipment RELAYG6A-274P; The 4 pin A2 of chip SN74LVC4245A connect 1 pin of the second four-core plug J4; The 5 pin A3 of chip SN74LVC4245A connect 2 pin of the second four-core plug J4; The 6 pin A4 of chip SN74LVC4245A connect 3 pin of the second four-core plug J4, and 7,8,9,10 pin of chip SN74LVC4245A are unsettled, 11,12,13 pin GND ground connection; 14,15,16,17 pin are unsettled, and 23,24 pin VCCB connect+3.3V;
1,2,3 pin of relay R ELAYG6A-274P are unsettled, and 4 pin VCC connect+5V, 5 pin GND ground connection, and 7 pin are unsettled, and 8 pin R12 connect 4 pin of the second four-core plug J4.
4 quasi-representative power pins are arranged: CPU nuclear-electric power supply pin, I/O power pins, FLASH programming power pins, mimic channel power pins on the TI DSPC2000.The core voltage of TMS320F2812 is+1.8V that I/O voltage is+3.3V.The second tunnel generation+3.3V voltage of dual channel source conversion chip TPS767D138; Its Enable Pin 10 pin
pass through the 7th resistance R 7 ground connection, remain to enable.+ 5V input voltage inserts the second road power supply input 11 of dual channel source conversion chip TPS767D138 after by 4 filtering of second capacitor C, 2, the first capacitor C, 1, the four capacitor C; 12 pin 2IN, general+5V voltage transitions is+3.3V after the chip conversion, by 17; 18 pin 2OUT output ,+3.3V voltage by the 6th capacitor C 6,7 filtering once of the 7th capacitor C after, again by the 8th capacitor C 8, once (the DSP in-chip FLASH is used voltage to 9 filtering of the 9th capacitor C; Have relatively high expectations), after be connected to each+3.3V voltage introduces point.First via generation+1.8V the voltage of dual channel source conversion chip TPS767D138; Its Enable Pin 4 pin
through on draw the 4th resistance R 4 to receive+5V; Therefore+before 3.3V voltage is not set up; Its Enable Pin is a high level, does not promptly enable.+ 3.3V voltage is by the 8th resistance R 8, the 5th R5 dividing potential drop; If dividing point voltage is greater than 1.3V FET BSS138 saturation conduction then; Thereby Enable Pin
is a low level (promptly enabling), and general+5V voltage transitions is+1.8V after the chip conversion, by 23; 24 pin 1OUT output; + 1.8V voltage by the 5th capacitor C 5,10 filtering of the tenth capacitor C once, thereby realization+3.3V powers on earlier, the control of the sequence power-on that powers on behind+the 1.8V.
postpones 200ms and keeps low level; Become high level then; Reset completions, normal startup of DSP this moment; After thereby the core power supply that has guaranteed DSP was stable, system started from reset mode is stable.Pure+5V voltage input that the outside provides after the 6th resistance R 6 current limlitings, lights light emitting diode D1.
In conjunction with Fig. 3, the DSP control module also comprises power module, and this power module comprises chip TPS767D138, the 4th resistance R 4, the 5th resistance R 5, the 6th resistance R 6, the 7th resistance R 7, the 8th resistance R 8, ten capacitor C 1～C10; FET Q1, light emitting diode D1, the 1 pin NC of said chip TPS767D138,2 pin NC, 3 pin 1GND ground connection; The D pin drain electrode of 4 pin
and the 4th resistance R 4 one ends and FET Q1 links to each other, and the other end of the 4th resistance R 4 links to each other with+5V power supply, and making
under the original state is high level; 5 pin of chip TPS767D138,6 pin 1IN connect behind the 3rd capacitor C 3, first capacitor C 1, second capacitor C, 2 one ends with+5V and link to each other; The other end ground connection of the 3rd capacitor C 3, first capacitor C 1, second capacitor C 2, above-mentioned three electric capacity are right+and 5V plays filter action, one termination of the 6th resistance R 6+5V; The other end links to each other with light emitting diode D1 one end; The other end ground connection of light emitting diode D1, the 7 pin NC of chip TPS767D138,8 pin NC, 9 pin 2GND ground connection, 10 pin
link to each other with the 7th resistance R 7; The other end ground connection of the 7th resistance R 7; Make that the 3.3V voltage transitions keeps enabling always, 11 pin of chip TPS767D138,12 pin 2IN connect behind the 4th capacitor C 4, first capacitor C 1, second capacitor C, 2 one ends with+5V and link to each other, the other end ground connection of the 4th capacitor C 4, first capacitor C 1, second capacitor C 2; Right+5V plays filter action; 13 pin of chip TPS767D138,14 pin NC ground connection, 15 pin, 16 pin NC ground connection, 17 pin, 18 pin 2OUT output 3.3V voltage also links to each other with the 7th capacitor C 7, the 6th capacitor C 6, the 9th capacitor C 9, the 8th capacitor C 8 one ends; The other end ground connection of the 7th capacitor C 7, the 6th capacitor C 6, the 9th capacitor C 9, the 8th capacitor C 8; 3.3V is played filter action, and 17 pin of chip TPS767D138,18 pin 2OUT also link to each other with an end of the 8th resistance R 8, and the other end of the 8th resistance R 8 links to each other with the G pin grid of the 5th resistance R 5 one ends and FET Q1; The other end ground connection of the 5th resistance R 5; The S pin source ground of FET Q1,19 pin of chip TPS767D138,20 pin, 21 pin NC ground connection,
is unsettled for 22 pin; 23 pin, 24 pin 1OUT output 1.8V voltage and with link to each other with the 5th capacitor C 5, the tenth capacitor C 10 1 ends; The other end ground connection of the 5th capacitor C 5, the tenth capacitor C 10 is played filter action to 1.8V, and the 25 pin 1FB/SENSE of chip TPS767D138 are unsettled; 26 pin, 27 pin NC ground connection, 28 pin
connect 160 pin
of chip TMS 320 F 2812.
Main program flow chart is as shown in Figure 4.System's power-up initializing finishes the laggard Control Circulation of becoming owner of.The serial ports button of in main control circulation, waiting for interrupts having: quicken 1 or quicken 2 buttons interrupt, slow down 1 or slow down that 2 buttons interrupt, speed is provided with that button interrupts, the mileage reset key interrupts, the switching-over button interrupts, starts that button interrupts, interruptions that stop key, and then calls corresponding button interrupt service routine if produce above-mentioned serial ports button interruption.The external interrupt of wait is to be triggered by the low level that Hall element produces in main control circulates, and interrupt service routine carries out mileage calculating if mileage calculating is then called in this interruption of generation.
It is as shown in Figure 5 that speed increases button interrupt service routine process flow diagram.This interrupt service routine is accomplished accelerated operation, simultaneously renewal speed displayed value and timer conter value.
It is as shown in Figure 6 that speed reduces button interrupt service routine process flow diagram.This interrupt service routine is accomplished deceleration-operation, simultaneously renewal speed displayed value and timer conter value.
It is as shown in Figure 7 that speed is provided with button interrupt service routine process flow diagram.This interrupt service routine closes motor driver earlier and enables, closes the timer conter interruption, stops motor and rotates, and with the zero clearing of speed displayed value, opens motor driver again and enables, and can carry out the speed setting operation afterwards.
It is as shown in Figure 8 to start button interrupt service routine process flow diagram.This interrupt service routine is rebound the timer conter value, opens timer conter and interrupts, and makes motor according to the rotational speed of setting.
Switching-over button interrupt service routine process flow diagram is as shown in Figure 9.This interrupt service routine is to the negate of motor commutation control signal, and renewal motor commutation indicating graphic.
Mileage reset key interrupt service routine process flow diagram is shown in figure 10.This interrupt service routine is with the zero clearing of mileage displayed value.
The interrupt service routine process flow diagram that stops key is shown in figure 11.This interrupt service routine disable motor enables, and motor is stopped operating.
It is shown in figure 12 that mileage calculates the interrupt service routine process flow diagram.This interrupt service routine calculates the mileage value, and upgrades the mileage displayed value.
Odometer calibration equipment of the present invention can be according to the ratio of gear of vehicle output shaft; In the travel speed scope of regulation; Travel speed powered vehicle odometer as requested rotates; And the record travel speed, calculate distance travelled, the correctness of verification vehicle odometer and vehicle-mounted inertial positioning directed navigation device odometer function.
Below in conjunction with embodiment the present invention is done further detailed description:
Embodiment:
One, drive unit advances Dian Ji ﹑ motor driver, the code-disc that has magnetic links, Hall element etc. You Bu and forms, can the powered vehicle odometer or vehicle-mounted inertial positioning directed navigation device odometer is pressed setting speed and direction is rotated;
Two, control box is made up of DSP control circuit, touch display screen etc., is used to be provided with motor speed, direction; Control odometer calibration equipment starts, stops; The control motor quickens, slows down; Show rotating speed, mileage.
The concrete technical indicator of odometer calibration equipment is following:
1. spacing connects with a cable greater than 5 meters between drive unit and the control box;
2. the relation of revolution and distance travelled: 588.813 commentaries on classics/kilometers;
3. show mileage (maximum): 200000 meters, odometer precision: 0.1 meter;
4. speed setting scope: 0～150 kilometer/hour, speed error: 0.1 kilometer/hour;
5. Structural Design Requirement: show with button operation in the front, cable plug and attaching plug are at cabinet at the back.
The front of control box is an input/output terminal, and input/output terminal can be divided into two zones: a zone is a key zone, and another zone is the viewing area.The back side of control box is cable plug and attaching plug.
A) key zone
Key zone has nine buttons, and its title and function are following:
Be provided with: key is set a speed initial value can be set.After the start, by following order speed is set: press earlier key is set, press accelerator key 1 or accelerator key 2 again, deceleration key 1 or accelerator key 2 are provided with the speed initial value that needs, and press start key at last, and stepper motor can rotate according to this setting speed.Attention: consider the physical characteristics of stepper motor itself, initial value should not be too big, generally below 10 kilometers/hour.
Start: start key with key be set be used, be used for speed initial value starter motor to set.
Stop: stop key can stop the motor operation immediately.Attention: consider motor characteristic, when rotating speed is directly not press stop key more than 60 kilometers/hour the time, and should press the deceleration key earlier, by the time after motor speed drops to below 60 kilometers/hour, press stop key again.
Switching-over: reversing key is used to change turning to of motor, and when pressing this key, the direction indication of display interface can become open circles or filled circles thereupon.
Mileage resets: press the mileage reset key and can by next time, be about to the odometer count value zero clearing of viewing area in real time to the zero clearing of mileage value.
Quicken 1: quicken 1 key when pressing, the value of gathering way is 0.1 kilometer/hour at every turn.
Quicken 2: quicken 2 keys when pressing, the value of gathering way is 1 kilometer/hour at every turn.
Slow down 1: when 1 key that slows down is pressed, reduce 0.1 kilometer/hour of velocity amplitude at every turn.
Slow down 2: when 2 keys that slow down are pressed, reduce 1 kilometer/hour of velocity amplitude at every turn.
B) viewing area
The viewing area is divided into upper and lower two rows.Last row's display speed value, following row shows the mileage value.Velocity amplitude viewing area maximal value is 150.0 kilometers/hour, can be to its zero clearing by key and stop key are set.Mileage value viewing area maximal value is shown as 200.0000 kilometers, reach after the maximum can automatic clear or press the mileage reset key can be in real time to the zero clearing of mileage value.
C) control box plug
The control box back side has three aviation plugs and a protective tube.See from the control box back side, from left to right be followed successively by sensor plug, motor plug, attaching plug and protective tube.
Claims (4)
1. odometer calibration equipment; It is characterized in that; Comprise drive unit and control box, said drive unit comprises stepper motor, motor driver, has the code-disc of magnetic links, Hall element, and said control box comprises DSP control module and input/output terminal; The code-disc that wherein has a magnetic links is positioned in the rotating shaft of stepper motor and under the drive of stepper motor, rotates; Hall element is positioned at the code-disc side that has magnetic links; This Hall element is connected with the DSP control module, will be transferred to the DSP control module through the low level pulse signal that Hall effect produces, and the DSP control module links to each other with stepper motor through motor driver; The rotation of control step motor, this DSP control module also is connected with input/output terminal.
2. odometer calibration equipment according to claim 1; It is characterized in that; Said DSP control module comprises chip TMS 320 F 2812 [U1], chip SN74LVC4245A [U2], relay R ELAYG6A-274P [U5], the first four-core plug [J3], the second four-core plug [J4], the 3rd resistance [R3] and stabilivolt [D2]; 1 pin ground connection of the first four-core plug [J3], 2 pin are inserted Hall element output signal SIGNALIN, and 2 pin of the first four-core plug [J3] also link to each other with 149 pin GPIOE0_XINT1 of chip TMS 320 F 2812 [U1] and an end of stabilivolt [D2] through the 3rd resistance [R3]; The other end ground connection of stabilivolt [D2]; The 3rd resistance [R3], stabilivolt [D2] are to signal SIGNALIN current limliting, limit volt, and 3 pin of the first four-core plug [J3] are unsettled, and 4 pin connect+5V;
92 pin GPIOA0_PWM1 of chip TMS 320 F 2812 [U1] meet the 21 pin B1 of chip SN74LVC4245A [U2]; 93 pin GPIOA1_PWM2 of chip TMS 320 F 2812 [U1] meet the 20 pin B2 of chip SN74LVC4245A [U2]; 94 pin GPIOA2_PWM3 of chip TMS 320 F 2812 [U1] meet the 19 pin B3 of chip SN74LVC4245A [U2], and 102 pin GPIOA6_T1PWM_T1CMP of chip TMS 320 F 2812 [U1] meet the 18 pin B4 of chip SN74LVC4245A [U2];
The 1 pin VCCA of chip SN74LVC4245A [U2] connects+5V; 2 pin DIR and 22 pin
ground connection; 3 pin A1 succeed the 6 pin R10 of electrical equipment RELAYG6A-274P [U5]; The 4 pin A2 of chip SN74LVC4245A [U2] connect 1 pin of the second four-core plug [J4]; The 5 pin A3 of chip SN74LVC4245A [U2] connect 2 pin of the second four-core plug [J4]; The 6 pin A4 of chip SN74LVC4245A [U2] connect 3 pin of the second four-core plug [J4], and 7,8,9,10 pin of chip SN74LVC4245A [U2] are unsettled, 11,12,13 pin GND ground connection; 14,15,16,17 pin are unsettled, and 23,24 pin VCCB connect+3.3V;
1,2,3 pin of relay R ELAYG6A-274P [U5] are unsettled, and 4 pin VCC connect+5V, 5 pin GND ground connection, and 7 pin are unsettled, and 8 pin R12 connect 4 pin of the second four-core plug [J4].
3. odometer calibration equipment according to claim 1 and 2 is characterized in that the DSP control module is also drawn together power module; This power module comprises chip TPS767D138 [U4], the 4th resistance [R4], the 5th resistance [R5], six resistance [R6], the 7th resistance [R7], the 8th resistance [R8], ten capacitor C 1～C10, FET [Q1], light emitting diode [D1]; The 1 pin NC of said chip TPS767D138 [U4], 2 pin NC, 3 pin 1GND ground connection, the D pin drain electrode of 4 pin
and the 4th resistance [R4] end and FET [Q1] links to each other, and the other end of the 4th resistance [R4] links to each other with+5V power supply; Make
under the original state for high level, the 5 pin 1IN of chip TPS767D138 [U4] with link to each other the other end ground connection of the 3rd electric capacity [C3], first electric capacity [C1], second electric capacity [C2] with+5V after 6 pin 1IN connect the 3rd electric capacity [C3], first electric capacity [C1], second electric capacity [C2] end; Above-mentioned three electric capacity are right+and 5V plays filter action; One termination+the 5V of the 6th resistance [R6], the other end links to each other the other end ground connection of light emitting diode [D1] with light emitting diode [D1] end; The 7 pin NC of chip TPS767D138 [U4], 8 pin NC, 9 pin 2GND ground connection; 10 pin
link to each other with the 7th resistance [R7], and the other end ground connection of the 7th resistance [R7] makes that the 3.3V voltage transitions keeps enabling always; The 11 pin 2IN of chip TPS767D138 [U4] with link to each other with+5V after 12 pin 2IN connect the 4th electric capacity [C4], first electric capacity [C1], second electric capacity [C2] end; The other end ground connection of the 4th electric capacity [C4], first electric capacity [C1], second electric capacity [C2], right+5V plays filter action, the 13 pin NC of chip TPS767D138 [U4] and 14 pin NC ground connection; 15 pin NC and 16 pin NC ground connection; 17 pin 2OUT link to each other with 18 pin 2OUT output 3.3V voltage and with the 7th electric capacity [C7], the 6th electric capacity [C6], the 9th electric capacity [C9], the 8th electric capacity [C8] end, and the other end ground connection of the 7th electric capacity [C7], the 6th electric capacity [C6], the 9th electric capacity [C9], the 8th electric capacity [C8] is played filter action to 3.3V; 17 pin of chip TPS767D138 [U4], 18 pin 2OUT also link to each other with an end of the 8th resistance [R8]; The other end of the 8th resistance [R8] links to each other with the G pin grid of the 5th resistance [R5] end and FET [Q1], the other end ground connection of the 5th resistance [R5], the S pin source ground of FET [Q1]; The 19 pin NC of chip TPS767D138 [U4], 20 pin NC and 21 pin NC ground connection;
is unsettled for 22 pin, 23 pin 1OUT and 24 pin 1OUT output 1.8V voltage and with link to each other the other end ground connection of the 5th electric capacity [C5], the tenth electric capacity [C10] with the 5th electric capacity [C5], the tenth electric capacity [C10] end; 1.8V is played filter action; The 25 pin 1FB/SENSE of chip TPS767D138 [U4] are unsettled, 26 pin NC and 27 pin NC ground connection, and 28 pin
connect 160 pin
of chip TMS 320 F 2812 [U1]
4. odometer calibration equipment according to claim 1 and 2 is characterized in that, said input/output terminal is a touch-screen.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011101943786A CN102230807B (en) | 2011-07-12 | 2011-07-12 | Odometer calibrating device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011101943786A CN102230807B (en) | 2011-07-12 | 2011-07-12 | Odometer calibrating device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102230807A CN102230807A (en) | 2011-11-02 |
| CN102230807B true CN102230807B (en) | 2012-11-14 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011101943786A Expired - Fee Related CN102230807B (en) | 2011-07-12 | 2011-07-12 | Odometer calibrating device |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103234559B (en) * | 2013-05-14 | 2015-08-05 | 贵州省机械电子产品质量监督检验院 | High-precision simulation mileage signal generator |
| CN103269576B (en) * | 2013-05-31 | 2016-01-20 | 哈尔滨工业大学 | The method of full-automatic chip mounter nozzle head axle initial point quick position |
| CN104457801A (en) * | 2014-10-30 | 2015-03-25 | 贵州航天凯山石油仪器有限公司 | Motor encoder suitable for downhole operation |
| CN105457188A (en) * | 2015-12-30 | 2016-04-06 | 南京理工大学 | Intelligent vehicle-mounted fire extinguishing control system |
| CN105973127A (en) * | 2016-05-23 | 2016-09-28 | 南京理工大学 | High-precision digital display goniometer |
| CN111060134B (en) * | 2019-12-10 | 2022-11-29 | 中船航海科技有限责任公司 | Device for measuring follow-up error of magnetic heading sending device |
| CN110873576B (en) * | 2020-01-17 | 2020-04-24 | 湖南智航联测科技有限公司 | Hall odometer detection equipment |
| CN113268489A (en) * | 2021-04-23 | 2021-08-17 | 天地（常州）自动化股份有限公司 | Cumulant synchronization method for host and display of mine vehicle protection device |
| CN114114245B (en) * | 2022-01-27 | 2022-04-12 | 成都工航科技有限公司 | High-speed train positioning method and system |
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| CN201575815U (en) * | 2009-11-23 | 2010-09-08 | 江西中船航海仪器有限公司 | Electronic odometer |
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| CN201575815U (en) * | 2009-11-23 | 2010-09-08 | 江西中船航海仪器有限公司 | Electronic odometer |
| CN201811743U (en) * | 2010-09-25 | 2011-04-27 | 周文涛 | Electric vehicle mileage counting device |
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| CN102230807A (en) | 2011-11-02 |
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