CN101159094A - Synthronous device of agriculture operation vehicle data acquisition system - Google Patents
Synthronous device of agriculture operation vehicle data acquisition system Download PDFInfo
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- CN101159094A CN101159094A CNA2007101568144A CN200710156814A CN101159094A CN 101159094 A CN101159094 A CN 101159094A CN A2007101568144 A CNA2007101568144 A CN A2007101568144A CN 200710156814 A CN200710156814 A CN 200710156814A CN 101159094 A CN101159094 A CN 101159094A
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Abstract
The invention discloses a synchronous device of a farmland operation vehicle data collecting system, consisting of a synchronous triggering signal generating device and a plurality of measurement and control electronic units with the same structure. Two feet of a first differential motion driving chip of the synchronous triggering signal generating device are respectively connected with (A) line and (B) line of a synchronous signal transmitting twisted pair line. The (A) line and the (B) line of the twisted pair line are respectively connected with the two feet of a second differential motion driving chip in a plurality of measurement and control electronic units with the same structure in parallel. The synchronous triggering signal generating device generates synchronous signals with certain frequency. The synchronous signals pass through the differential driving chip and are transmitted to all synchronous triggering signal receivers, which are subject to the measurement and control electronic units. The synchronous signals facilitate all the measurement and control electronic units to synchronously start the collection of signals. The invention can be used for automatic navigation farmland operation vehicles and farmland operation vehicles with highly automation in accurate fertilization, accurate spray, accurate semination and accurate collection of crop information.
Description
Technical field
The present invention relates to the synchronous device of vehicle data acquisition system, especially relate to a kind of synchronous device of agriculture working vehicle data acquisition system (DAS).
Background technology
(for example: mechanism tractor/harvester/seeder etc.) is than the conventional vehicles complexity for agriculture working vehicle, its mechanism not only comprises the required motor mechanisms of conventional vehicles, arrestment mechanism, steering mechanism, gear train, but also need possess the required special entity of farm work.The driver of agricultural working truck must take into account and travel and operation, makes such mechanical work efficiency be restricted.The robotization of agriculture working vehicle is exactly the current state by each mechanical mechanism of computer monitoring, uses advanced analysis software then and makes corresponding decision-making, sends every control command, finally realizes the robotization of agricultural operation machinery.Because the complicacy of agriculture working vehicle mechanism causes detected parameters many than conventional vehicles, and its distributing position relatively disperses, so distributed monitoring system is more suitable for than Concentrated Monitoring and Control System.For the vehicle in the motion, more very important is to guarantee synchronously image data, and this posture estimation system to vehicle has very important significance.At present, though there are people that the purpose that automatic checkout system is used to study has been installed in agriculture working vehicle, because the laboratory vehicle speed ratio is lower, the different sensors data synchronization does not also obtain people's attention yet, but along with these systems move towards practicability, it is particularly urgent that data synchronization becomes.
Summary of the invention
In order to obtain the synchrodata of different sensors in the agriculture working vehicle, the object of the present invention is to provide a kind of synchronous device of agriculture working vehicle data acquisition system (DAS), based on non-equilibrium differential driving, realize all observing and controlling electronic unit synchronous acquisition signals.
The technical solution adopted for the present invention to solve the technical problems is:
Comprise the observing and controlling electronic unit composition that the synchronous triggering signal generating means is identical with a plurality of structures; The first differential chip for driving bipod in the synchronous triggering signal generating means is connected respectively to A, the B line of synchronizing signal transmission twisted-pair feeder, and the second differential chip for driving bipod in identical with a plurality of structures respectively observing and controlling electronic unit of the A of twisted-pair feeder, B line is connected in parallel.
Described synchronous triggering signal generating means comprises AT89S52 first central processing unit, TLP521 first photoelectric isolating device, the RS485 first differential chip for driving and three resistance, four electric capacity and first connector; 28 pin of first central processing unit are connected to 2 pin of first photoelectric isolating device, 4 pin of first photoelectric isolating device are connected to 4 pin of the first differential chip for driving, 2 pin and 3 pin of the first differential chip for driving connect high level, and 6 pin of the first differential chip for driving and 7 pin are connected respectively to A, the B line of synchronizing signal transmission twisted-pair feeder.
Described observing and controlling electronic unit comprises AT89S52 second central processing unit, TLP521 second photoelectric isolating device, the RS485 second differential chip for driving and other three resistance, other four electric capacity and second connector; 6 pin of the second differential chip for driving and 7 pin are connected respectively to A, the B line of synchronizing signal transmission twisted-pair feeder, 2 pin of the second differential chip for driving and 3 pin ground connection, 4 pin of the second differential chip for driving are connected to 2 pin of second photoelectric isolating device, and 4 pin of second photoelectric isolating device are connected to 13 pin of second central processing unit.
The useful effect that the present invention has is: this device can make each observing and controlling electronic unit receive the signal that starts collection simultaneously, it can be applicable to the agriculture working vehicle of self-navigation, and accurately fertilising, spray medicine, sowing, collection Crop Information etc. possess supermatic agriculture working vehicle.
Description of drawings
Fig. 1 is the structural principle block diagram of apparatus of the present invention.
Fig. 2 is the circuit theory diagrams of synchronous triggering signal generating means.
Fig. 3 is the circuit theory diagrams of observing and controlling electronic unit.
Fig. 1: 1. synchronous triggering signal generating means, 2. central processing unit (AT89S52), 3. differential chip for driving (RS485), 4. photoelectric isolating device (TLP521), 5. synchronizing signal transmission twisted-pair feeder, 6. differential chip for driving (RS485), 7. photoelectric isolating device (TLP521), 8. synchronous triggering signal receiving trap, 9. central processing unit (AT89S52), 10. observing and controlling electronic unit.
Embodiment
As shown in Figure 1, the present invention includes the synchronous triggering signal generating means 1 observing and controlling electronic unit identical with a plurality of structures 10 forms; First differential chip for driving 3 bipods in the synchronous triggering signal generating means 1 are connected respectively to A, the B line of synchronizing signal transmission twisted-pair feeder 5, and second differential chip for driving 6 bipods in identical with a plurality of structures respectively observing and controlling electronic unit 10 of the A of twisted-pair feeder 1, B line are connected in parallel.
As shown in Figure 2, described synchronous triggering signal generating means 1 comprises AT89S52 first central processing unit 2, TLP521 first photoelectric isolating device 4, the RS485 first differential chip for driving 3 and three resistance R 201, R202, R203, four capacitor C 201, C202, C203, C204 and the first connector J2; 28 pin of first central processing unit 2 are connected to 2 pin of first photoelectric isolating device 4,4 pin of first photoelectric isolating device 4 are connected to 4 pin of the first differential chip for driving 3,2 pin and 3 pin of the first differential chip for driving 3 connect high level, and 6 pin of the first differential chip for driving 3 and 7 pin are connected respectively to A, the B line of synchronizing signal transmission twisted-pair feeder 5.
As shown in Figure 3, described observing and controlling electronic unit 10 comprises AT89S52 second central processing unit 9, TLP521 second photoelectric isolating device 7, the RS485 second differential chip for driving 6 and other three resistance R 301, R302, R303, other four capacitor C 301, C302, C303, C304 and the second connector J3; 6 pin of the second differential chip for driving 6 and 7 pin are connected respectively to A, the B line of synchronizing signal transmission twisted- pair feeder 5,2 pin of the second differential chip for driving 6 and 3 pin ground connection, 4 pin of the second differential chip for driving 6 are connected to 2 pin of second photoelectric isolating device 7, and 4 pin of second photoelectric isolating device 7 are connected to 13 pin of second central processing unit 9.
Concrete working method is as follows:
The central processing unit 2 of synchronous triggering signal generating means 1 produces the pulse signal of the Transistor-Transistor Logic level of fixed frequency according to program, this pulse signal is input to differential chip for driving 3 through photoelectric isolating device 4, produce differential signal by differential chip for driving 3, differential signal transmission is to being transferred on the synchronizing signal transmission twisted-pair feeder 5 then, all observing and controlling electronic units 10 that connect this synchronizing signal transmission twisted-pair feeder 5 all can receive this differential signal simultaneously, the differential chip for driving 6 of the synchronizing signal receiving trap 8 of each observing and controlling electronic unit 10 receives after this differential signal, transform it for the pulse signal of Transistor-Transistor Logic level, be input to 13 pin (outer interrupt pin) of the central processing unit 9 of observing and controlling electronic unit 10 again through photoelectric isolating device 7, produce a zone bit that receives synchronization pulse by outer interrupt routine, this synchronizing pulse sign is realized the purpose of all observing and controlling electronic unit 10 synchronous acquisition with the log-on data collection.
The synchronous working principle of this device is to have utilized RS485 differential transfer mode to possess the function that bus type drives.If the A line of synchronizing signal transmission twisted-pair feeder, the voltage of B line are respectively VA, VB, so:
1) as if VA-VB＞200mV, the high level of receiving end output synchronously;
2) if VA-VB＜-200mV, receiving end output low level synchronously;
3) if-200mV＜VA-VB＜200mV, the high-impedance state of receiving end output synchronously.
Test shows, and form " 3) " can not occur, so this device can produce and receive synchronous triggering signal reliably.
Claims (3)
1. the synchronous device of an agriculture working vehicle data acquisition system (DAS) is characterized in that: comprise observing and controlling electronic unit (10) composition that synchronous triggering signal generating means (1) is identical with a plurality of structures; First differential chip for driving (3) bipod in the synchronous triggering signal generating means (1) is connected respectively to A, the B line of synchronizing signal transmission twisted-pair feeder (5), and second differential chip for driving (6) bipod in identical with a plurality of structures respectively observing and controlling electronic unit (10) of the A of twisted-pair feeder (5), B line is connected in parallel.
2. the synchronous device of a kind of agriculture working vehicle data acquisition system (DAS) according to claim 1 is characterized in that: described synchronous triggering signal generating means (1) comprises AT89S52 first central processing unit (2), TLP521 first photoelectric isolating device (4), the RS485 first differential chip for driving (3) and three resistance (R201, R202, R203), four electric capacity (C201, C202, C203, C204) and first connector (J2); 28 pin of first central processing unit (2) are connected to 2 pin of first photoelectric isolating device (4), 4 pin of first photoelectric isolating device (4) are connected to 4 pin of the first differential chip for driving (3), 2 pin and 3 pin of the first differential chip for driving (3) connect high level, and 6 pin of the first differential chip for driving (3) and 7 pin are connected respectively to A, the B line of synchronizing signal transmission twisted-pair feeder (5).
3. the synchronous device of a kind of agriculture working vehicle data acquisition system (DAS) according to claim 1 is characterized in that: described observing and controlling electronic unit (10) comprises AT89S52 second central processing unit (9), TLP521 second photoelectric isolating device (7), the RS485 second differential chip for driving (6) and other three resistance (R301, R302, R303), other four electric capacity (C301, C302, C303, C304) and second connector (J3); 6 pin of the second differential chip for driving (6) and 7 pin are connected respectively to A, the B line of synchronizing signal transmission twisted-pair feeder (5), 2 pin of the second differential chip for driving (6) and 3 pin ground connection, 4 pin of the second differential chip for driving (6) are connected to 2 pin of second photoelectric isolating device (7), and 4 pin of second photoelectric isolating device (7) are connected to 13 pin of second central processing unit (9).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007101568144A CN101159094A (en) | 2007-11-12 | 2007-11-12 | Synthronous device of agriculture operation vehicle data acquisition system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007101568144A CN101159094A (en) | 2007-11-12 | 2007-11-12 | Synthronous device of agriculture operation vehicle data acquisition system |
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| CN101159094A true CN101159094A (en) | 2008-04-09 |
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| Application Number | Title | Priority Date | Filing Date |
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| CNA2007101568144A Pending CN101159094A (en) | 2007-11-12 | 2007-11-12 | Synthronous device of agriculture operation vehicle data acquisition system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104852950A (en) * | 2014-10-17 | 2015-08-19 | 北汽福田汽车股份有限公司 | Synchronous acquisition system, method and vehicle of hybrid vehicle economic parameters |
| CN105406855A (en) * | 2011-01-12 | 2016-03-16 | 联发科技股份有限公司 | Driving Method |
-
2007
- 2007-11-12 CN CNA2007101568144A patent/CN101159094A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105406855A (en) * | 2011-01-12 | 2016-03-16 | 联发科技股份有限公司 | Driving Method |
| CN104852950A (en) * | 2014-10-17 | 2015-08-19 | 北汽福田汽车股份有限公司 | Synchronous acquisition system, method and vehicle of hybrid vehicle economic parameters |
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