CN103162716A - Handle position detector for engineering machinery - Google Patents
Handle position detector for engineering machinery Download PDFInfo
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- CN103162716A CN103162716A CN 201110412862 CN201110412862A CN103162716A CN 103162716 A CN103162716 A CN 103162716A CN 201110412862 CN201110412862 CN 201110412862 CN 201110412862 A CN201110412862 A CN 201110412862A CN 103162716 A CN103162716 A CN 103162716A
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Abstract
The invention discloses a handle position detector for engineering machinery. The handle position detector for the engineering machinery comprises a comparator and a power supply unit, wherein the input end of the comparator is connected with a detecting voltage setting unit, a handle position collecting unit, an advancing position setting unit, a draw-back position setting unit and a reversing position setting unit. The input end of the handle position collecting unit is connected with a handle signal output unit. The output end of the comparator is connected with a control signal output unit for outputting a control signal of engineering machinery working. The control signal output unit comprises a first relay, a second relay, a first relay driver which is connected with the first relay and a second relay driver which is connected with the second relay, wherein both the first relay driver and the second relay driver are connected with the output end of the comparator. The handle position detector for the engineering machinery is simple in structure, reasonable in design, low in cost, high in function flexibility, low in power dissipation, low in failure rate, good in extension performance, long in service life, strong in practicability and wide in range of application.
Description
Technical field
The present invention relates to technical field of engineering machinery, especially relate to a kind of engineering machinery handle position detecting device.
Background technology
At present, known handle position detection is to form by handle, potentiometer, PLC controller and physical construction.Potentiometer is built in joystick by mechanical mechanism, front and back cause the change in resistance of potentiometer when promoting joystick, after energising, the PLC controller detects potentiometer because of the voltage signal changing value that change in resistance causes, judges the physical location that handle is current.But, need the specific PLC controller to coordinate special handle to come the changing value of detectable voltage signals with this mode, be only applicable to configure the engineering equipment of display and electronic fuel injection engine, therefore when not strict to the accuracy requirement of handle position probing in the part engineering machinery, known detection mode cost comparatively costliness and the scope of application narrower.
Summary of the invention
Technical matters to be solved by this invention is for above-mentioned deficiency of the prior art, a kind of engineering machinery handle position detecting device is provided, and it is simple in structure, and is reasonable in design, realize that cost is low, functional mobility is higher, and is low in energy consumption, failure rate is low, Scalable Performance is good, long service life, practical, applied widely.
for solving the problems of the technologies described above, the technical solution used in the present invention is: a kind of engineering machinery handle position detecting device, it is characterized in that: the power supply unit that comprises comparer and the power supply of each power unit, the input end of described comparer is connected to and detects the voltage setup unit, be used for gathering the handle position collecting unit of handle position, be used for arranging the progressive position setting unit of progressive position, the car backing position setting unit that is used for that the going-back position setting unit of going-back position is set and is used for arranging car backing position, the input end of described handle position collecting unit is connected to the handle signal output unit, the output terminal of described comparer is connected to the control signal output unit for output engineer machinery operation control signal, described control signal output unit comprises the first relay, the second relay, the first relay driver that joins with the first relay and the second relay driver that joins with the second relay, described the first relay driver and the second relay driver all join with the output terminal of comparer.
above-mentioned engineering machinery handle position detecting device, it is characterized in that: described comparer is chip LM339N, described power supply unit comprises the 24V power supply, chip LM7818, chip LM7812, chip LM7809, chip 7805 and capacitor C 1, C2 and C3, described handle position collecting unit is potentiometer RP1, described progressive position collecting unit comprises potentiometer RP2 and resistance R 2, described going-back position collecting unit comprises potentiometer RP3 and resistance R 3, described car backing position collecting unit comprises potentiometer RP4 and resistance R 4, described the first relay driver comprises triode BG1 and diode D1, described the first relay is relay J K1, described the second relay driver comprises triode BG2 and diode D2, described the second relay is relay J K2, the pin 1 of described chip LM339N and pin 2 all join with the base stage of triode BG2, the pin 3 of described chip LM339N joins and passes through capacitor C 2 ground connection with an end of relay J K2 coil, the pin 4 of described chip LM339N joins with the sliding end of potentiometer RP2, the pin 5 of described chip LM339N and pin 6 all join with detection voltage setup unit, the pin 7 of described chip LM339N joins with the sliding end of potentiometer RP3, the pin 8 of described chip LM339N joins with the sliding end of potentiometer RP4, the pin 9 of described chip LM339N joins with the stiff end of potentiometer RP1, pin 12 ground connection of described chip LM339N, the pin 14 of described chip LM339N joins with the base stage of triode BG 2, be parallel with resistance R 4 between the pin 1 of described chip LM339N and pin 3, be parallel with resistance R 5 between the pin 3 of described chip LM339N and pin 14, the pin 1 of described chip LM7818 joins with the output terminal of 24V power supply, the pin 3 of described chip LM7818 joins with the pin 1 of chip LM7812, the pin 3 of described chip LM7812 joins and passes through capacitor C 1 ground connection with the pin 1 of chip LM7809, the pin 3 of described chip LM7809 joins and passes through capacitor C 2 ground connection with the pin 1 of chip LM7805, the pin 3 of described chip LM7805 is by capacitor C 3 ground connection, the pin 2 of the pin 2 of described chip LM7818, the pin 2 of chip LM7812, chip LM7809 and the equal ground connection of the pin of chip LM7805 2, the sliding end of described potentiometer RP1 and another stiff end all join with the handle signal output unit, the stiff end of described potentiometer RP2 joins by the pin 3 of resistance R 2 with chip 7805, another stiff end ground connection of described potentiometer RP2, stiff end of described potentiometer RP3 and the pin 3 of chip 7805 join, and another stiff end of described potentiometer RP3 is by resistance R 3 ground connection, stiff end of described potentiometer RP4 and the pin 3 of chip 7805 join, and another stiff end of described potentiometer RP4 is by resistance R 4 ground connection, one end of the positive pole of the collector of described triode BG1 and diode D1 and relay J K 1 coil joins, the grounded emitter of described triode BG1, the other end of the negative pole of described diode D1 and relay J K1 coil all joins with the pin 3 of chip LM7812, the pin 3 of one end of described relay J K1 contact and the output terminal of 24V power supply or chip LM7812 joins, and the other end of described relay J K1 contact is 24V or 12V voltage output end, one end of the positive pole of the collector of described triode BG2 and diode D2 and relay J K2 coil joins, the grounded emitter of described triode BG2, the other end of the negative pole of described diode D2 and relay J K2 coil all joins with the pin 3 of chip LM7809, one end of described relay J K2 contact and the pin 3 of chip LM7812 join, and the other end of described relay J K2 contact is 9～12V voltage output end.
The present invention compared with prior art has the following advantages:
1, of the present invention simple in structure, reasonable in design, need not the complicated circuit supports such as special IC or processor, only reach required function by comparer merely, realize that cost is low.
2, of the present invention low in energy consumption, failure rate is low need not the computing mass data and need not software or the support of program, therefore do not exist high, the weak heat-dissipating of heating or fault to be difficult to the problems such as maintenance.
3, functional mobility of the present invention is higher, by the input voltage value of each comparer of Set arbitrarily, utilizes the various combination of different magnitudes of voltage, can realize different types of control method.
4, the present invention has only used three comparers in chip LM339N, utilizes the 4th comparer independently to add other kinds and controls function, and Scalable Performance is good.
5, control mode of the present invention is abundant, utilizes the relay normally open normally closed contact can control flexibly circuit than wide-voltage range, for example DC5～32V all can, relay whether controlled by triode by closure, long service life.
6, of the present invention practical, applied widely.
In sum, the present invention is simple in structure, and is reasonable in design, realizes that cost is low, and functional mobility is higher, and is low in energy consumption, failure rate is low, and Scalable Performance is good, and long service life is practical, and is applied widely.
Below by drawings and Examples, technical scheme of the present invention is described in further detail.
Description of drawings
Fig. 1 is circuit block diagram of the present invention.
Fig. 2 is circuit theory diagrams of the present invention.
Description of reference numerals:
The 1-comparer; The 2-power supply unit; 3-detects the voltage setup unit;
4-handle position collecting unit; 5-progressive position setting unit; 6-going-back position setting unit;
7-car backing position setting unit; 8-handle signal output unit; 9-the first relay;
10-the second relay; 11-the first relay driver;
12-the second relay driver; 13-24V or 12V voltage output end;
14-9～12V voltage output end; The 15-24V power supply.
Embodiment
as shown in Figure 1, the present invention includes the power supply unit 2 of comparer 1 and the power supply of each power unit, the input end of described comparer 1 is connected to and detects voltage setup unit 3, be used for gathering the handle position collecting unit 4 of handle position, be used for arranging the progressive position setting unit 5 of progressive position, the car backing position setting unit 7 that is used for that the going-back position setting unit 6 of going-back position is set and is used for arranging car backing position, the input end of described handle position collecting unit 4 is connected to handle signal output unit 8, the output terminal of described comparer 1 is connected to the control signal output unit for output engineer machinery operation control signal, described control signal output unit comprises the first relay 9, the second relay 10, the first relay driver 11 that joins with the first relay 9 and the second relay driver 12 that joins with the second relay 10, described the first relay driver 11 and the second relay driver 12 all join with the output terminal of comparer 1.
in conjunction with Fig. 2, in the present embodiment, described comparer 1 is chip LM339N, described power supply unit 2 comprises 24V power supply 15, chip LM7818, chip LM7812, chip LM7809, chip 7805 and capacitor C 1, C2 and C3, described handle position collecting unit 4 is potentiometer RP1, described progressive position collecting unit 5 comprises potentiometer RP 2 and resistance R 2, described going-back position collecting unit 6 comprises potentiometer RP3 and resistance R 3, described car backing position collecting unit 7 comprises potentiometer RP4 and resistance R 4, described the first relay driver 11 comprises triode BG1 and diode D1, described the first relay 9 is relay J K1, described the second relay driver 12 comprises triode BG2 and diode D2, described the second relay 10 is relay J K2, the pin 1 of described chip LM 339N and pin 2 all join with the base stage of triode BG2, the pin 3 of described chip LM339N joins and passes through capacitor C 2 ground connection with an end of relay J K2 coil, the pin 4 of described chip LM339N joins with the sliding end of potentiometer RP2, the pin 5 of described chip LM339N and pin 6 all join with detection voltage setup unit 3, the pin 7 of described chip LM339N joins with the sliding end of potentiometer RP3, the pin 8 of described chip LM339N joins with the sliding end of potentiometer RP4, the pin 9 of described chip LM339N joins with the stiff end of potentiometer RP1, pin 12 ground connection of described chip LM339N, the pin 14 of described chip LM339N joins with the base stage of triode BG 2, be parallel with resistance R 4 between the pin 1 of described chip LM339N and pin 3, be parallel with resistance R 5 between the pin 3 of described chip LM339N and pin 14, the pin 1 of described chip LM7818 joins with the output terminal of 24V power supply, the pin 3 of described chip LM7818 joins with the pin 1 of chip LM7812, the pin 3 of described chip LM7812 joins and passes through capacitor C 1 ground connection with the pin 1 of chip LM7809, the pin 3 of described chip LM7809 joins and passes through capacitor C 2 ground connection with the pin 1 of chip LM7805, the pin 3 of described chip LM7805 is by capacitor C 3 ground connection, the pin 2 of the pin 2 of described chip LM7818, the pin 2 of chip LM7812, chip LM7809 and the equal ground connection of the pin of chip LM7805 2, the sliding end of described potentiometer RP 1 and another stiff end all join with handle signal output unit 8, the stiff end of described potentiometer RP 2 joins by the pin 3 of resistance R 2 with chip 7805, another stiff end ground connection of described potentiometer RP 2, stiff end of described potentiometer RP3 and the pin 3 of chip 7805 join, and another stiff end of described potentiometer RP3 is by resistance R 3 ground connection, stiff end of described potentiometer RP4 and the pin 3 of chip 7805 join, and another stiff end of described potentiometer RP4 is by resistance R 4 ground connection, one end of the positive pole of the collector of described triode BG 1 and diode D1 and relay J K1 coil joins, the grounded emitter of described triode BG1, the other end of the negative pole of described diode D1 and relay J K1 coil all joins with the pin 3 of chip LM7812, the pin 3 of one end of described relay J K1 contact and the output terminal of 24V power supply or chip LM7812 joins, and the other end of described relay J K1 contact is 24V or 12V voltage output end 13, one end of the positive pole of the collector of described triode BG2 and diode D2 and relay J K2 coil joins, the grounded emitter of described triode BG 2, the other end of the negative pole of described diode D2 and relay J K2 coil all joins with the pin 3 of chip LM7809, one end of described relay J K2 contact and the pin 3 of chip LM7812 join, and the other end of described relay J K2 contact is 9～12V voltage output end 14.
Core controller in the present invention adopts voltage comparator chip LM339N, and this chip internal is equipped with 4 independently voltage comparators, can form easily various comparator circuits and pierce circuit; This voltage comparator input terminal voltage difference just can guarantee that greater than 10mv output can be converted to another kind of state reliably from a kind of state, and it is more satisfactory therefore LM339N being used in the Testing of Feeble Signals occasion.
Principle of work of the present invention and the course of work are:
(1) with potentiometer RP1 with after handle signal output unit 8 is connected, with joystick position change, potentiometer RP1 can produce the magnitude of voltage A that a 0～5V changes, change with handle position because of this change in voltage and synchronize, therefore the pin 9 of input chip LM339N is as the foundation that detects the handle physical location; Simultaneously, set by detecting voltage setup unit 3 pin 5 and pin 6 input chip LM339N, the magnitude of voltage A as a comparison that detect voltage and pass through chip LM339N;
(2) set the magnitude of voltage B that a 0～5V changes and the pin 4 of inputting chip LM339N by potentiometer RP2, as the progressive position voltage of handle; Set the magnitude of voltage C that a 0～5V changes and the pin 7 of inputting chip LM339N by potentiometer RP 3, as the going-back position voltage of handle; Have: during less than magnitude of voltage B, handle position is progressive position as magnitude of voltage A; During greater than magnitude of voltage C, handle position is going-back position as magnitude of voltage A; When magnitude of voltage A was between magnitude of voltage B and magnitude of voltage C, handle position was the centre position.After setting suitable magnitude of voltage B and magnitude of voltage C during first the use, chip LM339N can compare the magnitude of voltage B after the magnitude of voltage A that changes and setting and the size of magnitude of voltage C at any time, detects the physical location of handle according to the variation range of magnitude of voltage A.In other words, use exactly wherein 2 comparers of chip LM339N to set the move forward and backward magnitude of voltage of position of handle, compare with the magnitude of voltage of handle current location, utilize comparative result to judge advancing, retreating and the meta position of handle; Control whether conducting of triode BG1 by Output rusults, and then whether pilot relay JK1 is closed, according to this, desirable operation when handle arrives given voltage value B and magnitude of voltage C position can be set flexibly, for example, utilize the functions such as the Self-watering of street roller in this control engineering machinery and vibration in practical application.
(3) set the magnitude of voltage D that a 0～5V changes and the pin 8 of inputting chip LM339N by potentiometer RP 3, as the car backing position voltage of handle; Utilize equally chip LM339N that magnitude of voltage D and above-mentioned magnitude of voltage A are made comparisons, control whether conducting of triode BG2 by Output rusults, and then whether pilot relay JK2 is closed, according to this, desirable operation when handle arrives given voltage value D position can be set flexibly, for example, utilize the reverse alarming lamp of street roller in this control engineering machinery in practical application.
In addition, the present invention has only used three comparers in chip LM339N, utilizes the 4th comparer independently to add other kinds and controls function.
The above; it is only preferred embodiment of the present invention; be not that the present invention is imposed any restrictions, every any simple modification, change and equivalent structure of above embodiment being done according to the technology of the present invention essence changes, and all still belongs in the protection domain of technical solution of the present invention.
Claims (2)
1. engineering machinery handle position detecting device, it is characterized in that: the power supply unit (2) that comprises the power supply of comparer (1) and each power unit, the input end of described comparer (1) is connected to and detects voltage setup unit (3), be used for gathering the handle position collecting unit (4) of handle position, be used for arranging the progressive position setting unit (5) of progressive position, the car backing position setting unit (7) that is used for that the going-back position setting unit (6) of going-back position is set and is used for arranging car backing position, the input end of described handle position collecting unit (4) is connected to handle signal output unit (8), the output terminal of described comparer (1) is connected to the control signal output unit for output engineer machinery operation control signal, described control signal output unit comprises the first relay (9), the second relay (10), the first relay driver (11) that joins with the first relay (9) and the second relay driver (12) that joins with the second relay (10), described the first relay driver (11) and the second relay driver (12) all join with the output terminal of comparer (1).
2. according to engineering machinery claimed in claim 1 handle position detecting device, it is characterized in that: described comparer (1) is chip LM339N, described power supply unit (2) comprises 24V power supply (15), chip LM7818, chip LM7812, chip LM7809, chip 7805 and capacitor C 1, C2 and C3, described handle position collecting unit (4) is potentiometer RP1, described progressive position collecting unit (5) comprises potentiometer RP2 and resistance R 2, described going-back position collecting unit (6) comprises potentiometer RP3 and resistance R 3, described car backing position collecting unit (7) comprises potentiometer RP4 and resistance R 4, described the first relay driver (11) comprises triode BG1 and diode D1, described the first relay (9) is relay J K1, described the second relay driver (12) comprises triode BG2 and diode D2, described the second relay (10) is relay J K2, the pin 1 of described chip LM339N and pin 2 all join with the base stage of triode BG2, the pin 3 of described chip LM339N joins and passes through capacitor C 2 ground connection with an end of relay J K2 coil, the pin 4 of described chip LM339N joins with the sliding end of potentiometer RP2, the pin 5 of described chip LM339N and pin 6 all join with detection voltage setup unit (3), the pin 7 of described chip LM339N joins with the sliding end of potentiometer RP3, the pin 8 of described chip LM339N joins with the sliding end of potentiometer RP4, the pin 9 of described chip LM339N joins with the stiff end of potentiometer RP1, pin 12 ground connection of described chip LM339N, the pin 14 of described chip LM339N joins with the base stage of triode BG2, be parallel with resistance R 4 between the pin 1 of described chip LM339N and pin 3, be parallel with resistance R 5 between the pin 3 of described chip LM339N and pin 14, the pin 1 of described chip LM7818 joins with the output terminal of 24V power supply, the pin 3 of described chip LM7818 joins with the pin 1 of chip LM7812, the pin 3 of described chip LM7812 joins and passes through capacitor C 1 ground connection with the pin 1 of chip LM7809, the pin 3 of described chip LM7809 joins and passes through capacitor C 2 ground connection with the pin 1 of chip LM7805, the pin 3 of described chip LM7805 is by capacitor C 3 ground connection, the pin 2 of the pin 2 of described chip LM7818, the pin 2 of chip LM7812, chip LM7809 and the equal ground connection of the pin of chip LM7805 2, the sliding end of described potentiometer RP1 and another stiff end all join with handle signal output unit (8), the stiff end of described potentiometer RP 2 joins by the pin 3 of resistance R 2 with chip 7805, another stiff end ground connection of described potentiometer RP2, stiff end of described potentiometer RP3 and the pin 3 of chip 7805 join, and another stiff end of described potentiometer RP3 is by resistance R 3 ground connection, stiff end of described potentiometer RP4 and the pin 3 of chip 7805 join, and another stiff end of described potentiometer RP4 is by resistance R 4 ground connection, one end of the positive pole of the collector of described triode BG1 and diode D1 and relay J K1 coil joins, the grounded emitter of described triode BG1, the other end of the negative pole of described diode D1 and relay J K1 coil all joins with the pin 3 of chip LM7812, the pin 3 of one end of described relay J K1 contact and the output terminal of 24V power supply or chip LM7812 joins, and the other end of described relay J K1 contact is 24V or 12V voltage output end (13), one end of the positive pole of the collector of described triode BG2 and diode D2 and relay J K2 coil joins, the grounded emitter of described triode BG 2, the other end of the negative pole of described diode D2 and relay J K2 coil all joins with the pin 3 of chip LM7809, one end of described relay J K2 contact and the pin 3 of chip LM7812 join, and the other end of described relay J K2 contact is 9～12V voltage output end (14).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110412862 CN103162716A (en) | 2011-12-11 | 2011-12-11 | Handle position detector for engineering machinery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110412862 CN103162716A (en) | 2011-12-11 | 2011-12-11 | Handle position detector for engineering machinery |
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| CN103162716A true CN103162716A (en) | 2013-06-19 |
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| CN 201110412862 Pending CN103162716A (en) | 2011-12-11 | 2011-12-11 | Handle position detector for engineering machinery |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111279157A (en) * | 2017-09-25 | 2020-06-12 | 移动磁体技术公司 | Detection module for a rotating handle of a motor vehicle |
| CN114295335A (en) * | 2021-11-11 | 2022-04-08 | 江苏徐工工程机械研究院有限公司 | Engineering machinery control handle working interval testing system and analysis method |
-
2011
- 2011-12-11 CN CN 201110412862 patent/CN103162716A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111279157A (en) * | 2017-09-25 | 2020-06-12 | 移动磁体技术公司 | Detection module for a rotating handle of a motor vehicle |
| CN114295335A (en) * | 2021-11-11 | 2022-04-08 | 江苏徐工工程机械研究院有限公司 | Engineering machinery control handle working interval testing system and analysis method |
| CN114295335B (en) * | 2021-11-11 | 2023-12-08 | 江苏徐工工程机械研究院有限公司 | Engineering machinery control handle working area test system and analysis method |
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Application publication date: 20130619 |