CN103942996A - PID (Proportion Integration Differentiation) adjustment simulation teaching device controlled by control unit - Google Patents
PID (Proportion Integration Differentiation) adjustment simulation teaching device controlled by control unit Download PDFInfo
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- CN103942996A CN103942996A CN201310033615.XA CN201310033615A CN103942996A CN 103942996 A CN103942996 A CN 103942996A CN 201310033615 A CN201310033615 A CN 201310033615A CN 103942996 A CN103942996 A CN 103942996A
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Abstract
The invention discloses a PID (Proportion Integration Differentiation) adjustment simulation teaching device controlled by a control unit, which comprises a device body, a control module, an action execution demonstration module and an auxiliary function module in combination, wherein the control module and the action execution demonstration module are arranged on the device body; the control module comprises a motor drive, a pressure sensor, an inverter and a control unit; the action execution demonstration module comprises a water pump, a motor matched with the water pump, a water container, a water level display device and a connection tube; the auxiliary function module comprises power supplies, wire and a switch matched with the control module and the action execution demonstration module; and the control module, the action execution demonstration module and the auxiliary function module are in circuit connection. According to the device, on the basis of automatic control technology, the teaching content of PID adjustment application technology under the control of the control unit can be demonstrated intuitively, the teaching effects are intuitive, operation is convenient and easy to be understood and accepted by students, and the device is small in size, low in manufacturing cost and is particularly suitable to be popularized and used in universities and vocational colleges which are provided with the automatic control subject and the major.
Description
[technical field]
The present invention relates to a kind of teaching experimental equipment, relate in particular to the PID controlling a kind of application controls unit and regulate simulation teaching device.
[background technology]
In control theory, controller (controller) is a kind of signal sending according to sensor (sensor), adjust the output signal that sends to actuator (actuator), in order to change the device of managed object (plant) situation or state.Along with scientific and technological fast development, because it has signal feedback sensitively, regulate accurately, the incomparable plurality of advantages of the high traditional control model of degree of accuracy, is therefore used controller to be controlled in current each field and is widely used.
Sensu lato common controller, generally comprises industrial computer, single-chip microcomputer and programmable logic controller (PLC) PLC etc., and wherein programmable controller PLC is since coming out, and because it has easy to usely, programming is simple; Function is strong, and the ratio of performance to price is high; Hardware is comprehensive, and user is easy to use, strong adaptability; Reliability is high, and antijamming capability is strong; The design of system, installation, debugging work load are few; . many significant advantages such as maintenance load is little, therefore main replacement relay from the beginning carries out logic control, progressively develop into technical fields such as being widely used in analog quantity, pulsed quantity, PID control, communication, in national economy and commercial production, be widely used.At present the domestic institution of higher learning that respectively offer science and engineering specialty and vocational school substantially all offer the correlated curriculum of PLC.
PLC uses more in general instructional device, but its instructional function setting is typically implemented in the switching value application of PLC, principal mode is with the master that is applied as of portable case type, hand type, Elevator, and picture analog quantity, pulse and communication aspects are just relatively less, owing to relating to the quite maturation of its technology of PLC instructional device of switching value application, usable range is also comparatively extensive, does not repeat them here.And for another important applied field of PLC, in the regulating and controlling of PID (proportion integration differentiation), present stage also lacks relevant easy-to-use, simulation teaching device intuitively.
PID (Proportion Integration Differentiation) is the conventional control algolithm of Industry Control, no matter at the slow change procedure such as temperature, flow, or the fast process changing such as speed, position, effect all can be well controlled.Pid control algorithm is generally made up of proportional+integration item+differential term, and the feature of the pid algorithm of PLC is:
1, system is simple, and for the feature of different control system, usage ratio item, or usage ratio item+integration item, or usage ratio item+integration item+differential term, have stronger adaptability and dirigibility.
2, parameter adjustment is relatively simple, is easy to reach control requirement.
3, program design is simple, directly applies mechanically, and there is no loaded down with trivial details logic and arithmetical operation, is easy to realize in Practical Project.
As can be seen here, develop as early as possible the simulation teaching device of the application controls unit controls PID that is applicable to institution of higher learning's science and engineering major and career technology college teaching use, for universal, expansion teaching scope and the teaching efficiency of automation field technology, have great importance.
[summary of the invention]
For addressing the above problem, the invention provides the PID simulation teaching device that a kind of application controls unit is controlled, this device is taking automatic control technology as basis, regulate the content of courses of application technology to show intuitively to the PID under control module control, this simulation teaching device teaching efficiency is directly perceived, convenient operation, is easy to understand, accept for the person of receiving instruction; And this simulation teaching device volume is little, and manufacturing cost is lower, very suitablely offer automatic control account and professional institution of higher learning and vocational technical universities and colleges promotes the use of vast.
For achieving the above object, the present invention adopts following technical scheme:
The PID that a kind of application controls unit is controlled regulates simulation teaching device, constituted by device body, control module, action executing demonstration module and subsidiary function module, described control module and action executing demonstration module are located on described device body, described control module comprises motor driver, pressure transducer and control module, and described control module is the one in industrial computer, single-chip microcomputer, programmable logic controller (PLC) PLC; Motor, water receptacle, water level display device and connecting pipe that described action executing demonstration module comprises water pump, matches with water pump; Described subsidiary function module comprises and described control module and the suitable power supply source of action executing demonstration module and electric wire, switch; Described control module, action executing demonstration module and subsidiary function intermodule circuit are connected.
Preferably, described control module is PLC programmable logic controller (PLC).
Further, the described motor matching with water pump adopts stepper motor, and described motor driver is stepper motor driver, and the control end of described stepper motor is connected with described programmable logic controller (PLC) PLC circuit by described stepper motor driver; The axle head of the clutch end of described stepper motor downwards and be connected with described water pump; The water inlet end of described water pump is communicated with described water receptacle by described connecting pipe A; Described water level display device is transparent glass tube, described glass tube both ends open and vertically setting, and described glass tube top is water intake end, is communicated with the water side of described water pump by connecting pipe B; Described glass tube bottom is water side, is connected with one of three-way connection and leads to; Other two reduction of fractions to a common denominators of described three-way connection are not connected with pressure transducer and water receptacle, between described three-way connection and described water receptacle, are communicated with by ball valve, and described pressure transducer is connected with the signal input part circuit of described programmable logic controller (PLC) PLC.
Further, the described motor matching with water pump is threephase asynchronous machine, and described motor driver is frequency converter, and the power input of described threephase asynchronous machine is connected with the signal output part circuit of described frequency converter; The signal instruction input end of described frequency converter is connected with the circuit of output terminal of described programmable logic controller (PLC) PLC; The axle head of the clutch end of described threephase asynchronous machine downwards and be connected with described water pump; The water inlet end of described water pump is communicated with described water receptacle by described connecting pipe A; Described water level display device is transparent glass tube, described glass tube both ends open and vertically setting, and described glass tube top is water intake end, is communicated with the water side of described water pump by connecting pipe B; Described glass tube bottom is water side, is connected with one of three-way connection and leads to; Other two reduction of fractions to a common denominators of described three-way connection are not connected with pressure transducer and water receptacle, between described three-way connection and described water receptacle, are communicated with by ball valve, and described pressure transducer is connected with the signal input part circuit of described programmable logic controller (PLC) PLC.
Further, the power supply source in described subsidiary function module comprises power supply A and power supply B, and described power supply A is connected with described motor driver circuit; Described power supply B is connected with described programmable logic controller (PLC) PLC circuit.
Further, described device body is framed structure, and described device body is divided into four layers from top to bottom, and described stepper motor driver, programmable logic controller (PLC) PLC, water pump and the described stepper motor matching with water pump are located at top-down ground floor; Described frequency converter is located at the top-down second layer of described device body; Described threephase asynchronous machine is located at top-down the 3rd layer of described device body; The bottom of described device body is provided with described water receptacle; One side of the framework of described device body is vertically provided with described glass tube, and described glass tube bottom joins by three-way connection and described pressure transducer and water receptacle.
Further, described ball valve at instructional device in using when state in closing or crack state.
Further, described device body adopts stainless steel material to make, and the framework upper of described device body is provided with pushing hands; The bottom of described device body is also provided with roller.
Further, described connecting pipe A all adopts silica gel hose to be connected with described water feeding of water pump end, described connecting pipe B with the junction of the water side of described water pump.
Observe more intuitively demonstration effect for convenience of audient, the liquid in described water receptacle adopts colored liquid.
The present invention has adopted technique scheme, a kind of application controls PID simulation teaching device that unit is controlled is provided, this device is taking automatic control technology as basis, by the demonstration of constant pressure water supply, regulate the content of courses of application technology to show intuitively to the PID under control module control, this simulation teaching device teaching efficiency is directly perceived, and convenient operation is easy to understand, accept for the person of receiving instruction; And this simulation teaching device volume is little, and manufacturing cost is lower, very suitablely offer automatic control account and professional institution of higher learning and vocational technical universities and colleges promotes the use of vast.
[brief description of the drawings]
Fig. 1 is structure principle chart of the present invention.
[embodiment]
Applicant by reference to the accompanying drawings, carries out brief description to structure of the present invention and principle of work below:
The PID that a kind of application controls of the present invention unit is controlled regulates simulation teaching device, by device body, control module, action executing demonstration module and subsidiary function module constitute, described control module and action executing demonstration module are located on described device body, described control module comprises motor driver, pressure transducer and control module, due at present in automatic control field, controller is with industrial computer, single-chip microcomputer, programmable logic controller (PLC) PLC is main representative, therefore in the present invention, control module can be industrial computer, one in single-chip microcomputer or programmable logic controller (PLC) PLC, as preferred technical scheme, in specific embodiment, adopting programmable logic controller (PLC) PLC1 is control module, motor, water receptacle, water level display device and connecting pipe that described action executing demonstration module comprises water pump 2, matches with water pump, described subsidiary function module comprises and described control module and the suitable power supply source of action executing demonstration module and electric wire, switch, described control module, action executing demonstration module and subsidiary function intermodule circuit are connected.
In specific embodiment, water pump can adopt stepper motor 3 to be driven with the mode that stepper motor driver 31 matches, and also can adopt the mode that frequency converter matches with ordinary three-phase synchronous to carry out work.
In the time that the mode that adopts stepper motor 3 to match with stepper motor driver 31 drives water pump 2, the control end of stepper motor 3 is connected with described programmable logic controller (PLC) PLC1 circuit by described stepper motor driver 31; The axle head of the clutch end of described stepper motor 3 is connected with described water pump 2; The water inlet end of described water pump 2 is communicated with described water receptacle 4 by described connecting pipe A21; Described water level display device is transparent glass tube 5, described glass tube 5 both ends opens and vertically setting, and the top of described glass tube 5 is water intake end, is communicated with the water side of described water pump 2 by connecting pipe B22; Described glass tube 5 bottoms are water side, are connected with one of three-way connection 51 and lead to; Other two reduction of fractions to a common denominators of described three-way connection 51 are not connected with pressure sensing 6 devices and water receptacle 4, between described three-way connection 51 and described water receptacle 4, be communicated with by ball valve, described pressure transducer 6 is connected with the signal input part circuit of described programmable logic controller (PLC) PLC1.
Adopt threephase asynchronous machine with frequency converter as the technical scheme of the drive unit of water pump to be: the power input of threephase asynchronous machine is connected with the signal output part circuit of described frequency converter; The signal instruction input end of described frequency converter is connected with the circuit of output terminal of described programmable logic controller (PLC) PLC; The axle head of the clutch end of described threephase asynchronous machine downwards and be connected with described water pump; The water inlet end of described water pump is communicated with described water receptacle by described connecting pipe A; Described water level display device is transparent glass tube, described glass tube both ends open and vertically setting, and described glass tube top is water intake end, is communicated with the water side of described water pump by connecting pipe B; Described glass tube bottom is water side, is connected with one of three-way connection and leads to; Other two reduction of fractions to a common denominators of described three-way connection are not connected with pressure transducer and water receptacle, between described three-way connection and described water receptacle, are communicated with by ball valve, and described pressure transducer is connected with the signal input part circuit of described programmable logic controller (PLC) PLC.
In specific embodiment, as preferably, adopt stepper motor driver and stepper motor to be used in conjunction with the technical scheme as the drive source of water pump, this be because, adopt stepper motor, students, in the time observing the SEA LEVEL VARIATION of glass tube and the variation of inflow, can hear that stepper motor frequency of operation changes the change of the running audio frequency bringing, in vision with acoustically have more intuitively impression for teaching.
It should be noted that, occur in order to prevent from disturbing, described motor driver itself adopt power supply should with for programmable logic controller (PLC) PLC power power supply separate, therefore, in concrete enforcement, the present invention adopts two Switching Power Supplies, and power supply A71 is described motor driver power supply, and power supply B72 is programmable logic controller (PLC) PLC1 power supply.
In concrete enforcement, device body is framed structure, described device body is divided into four layers from top to bottom, and described stepper motor driver 31, programmable logic controller (PLC) PLC1, water pump 2 and the described stepper motor matching with water pump 3 are located at top-down ground floor; Described frequency converter is located at the top-down second layer of described device body; Described threephase asynchronous machine is located at top-down the 3rd layer of described device body; The bottom of described device body is provided with described water receptacle 4; One side of the framework of described device body is vertically provided with described glass tube 5, and described glass tube 5 bottoms join by three-way connection 51 and described pressure transducer 6 and water receptacle 4.Ball valve mentioned above at instructional device in using when state in closing or crack state, to simulate in constant pressure water supply user's the water state of using.
Push this device for ease of user, be provided with pushing hands at the framework upper of described device body, bottom is also provided with roller.
In the present invention, described connecting pipe A21 all adopts silica gel hose to be connected with described water pump 2 water inlet ends, described connecting pipe B22 with the junction of the water side of described water pump 2, this is because water pump middle can vibrations in working order, if the junction at connecting pipe and water pump adopts common plastics tube, can there is in use for some time the situations such as connecting pipe breaks, adopt not only difficult drop-off of silica gel hose, serviceable life is also longer.
Observe more intuitively demonstration effect for convenience of audient, liquid in described water receptacle adopts colored liquid, in actual applications, only need in water receptacle, fill and add the water of red ink can realize this effect, in water filling process, student can observe the variation of liquid level clearly from glass tube like this.
It should be noted that, embodiment be only to the description of one embodiment of the present of invention and non-limiting, the technical scheme of any employing essence summary of the invention of the present invention, all should be in protection scope of the present invention.
Claims (9)
1. the PID adjusting simulation teaching device that application controls unit is controlled, it is characterized in that: constituted by device body, control module, action executing demonstration module and subsidiary function module, described control module and action executing demonstration module are located on described device body, described control module comprises motor driver, pressure transducer and control module, and described control module is the one in industrial computer, single-chip microcomputer, programmable logic controller (PLC) PLC; Motor, water receptacle, water level display device and connecting pipe that described action executing demonstration module comprises water pump, matches with water pump; Described subsidiary function module comprises and described control module and the suitable power supply source of action executing demonstration module and electric wire, switch; Described control module, action executing demonstration module and subsidiary function intermodule circuit are connected.
2. the PID that a kind of application controls according to claim 1 unit is controlled regulates simulation teaching device, it is characterized in that: described control module is PLC programmable logic controller (PLC) (1).
3. the PID that a kind of application controls according to claim 1 and 2 unit is controlled regulates simulation teaching device, it is characterized in that: the described motor matching with water pump (2) adopts stepper motor (3), described motor driver is stepper motor driver (31), and the control end of described stepper motor (3) is connected with described programmable logic controller (PLC) PLC (1) circuit by connecting stepper motor driver (31); The axle head of the clutch end of described stepper motor (3) is connected with described water pump (2); The water inlet end of described water pump (2) is communicated with described water receptacle (4) by described connecting pipe A (21); Described water level display device is transparent glass tube (5), described glass tube (5) both ends open and vertically setting, described glass tube (5) top is water intake end, is communicated with the water side of described water pump by connecting pipe B (22); Described glass tube (5) bottom is water side, is connected with one of three-way connection (51) and leads to; Other two reduction of fractions to a common denominators of described three-way connection (51) are not connected with pressure transducer (6) and water receptacle (4), between described three-way connection (51) and described water receptacle (4), be communicated with by ball valve, described pressure transducer (6) is connected with the signal input part circuit of described programmable logic controller (PLC) PLC (1).
4. the PID that a kind of application controls according to claim 1 and 2 unit is controlled regulates simulation teaching device, it is characterized in that: the described motor matching with water pump is threephase asynchronous machine, described motor driver is frequency converter, and the power input of described threephase asynchronous machine is connected with the signal output part circuit of described frequency converter; The signal instruction input end of described frequency converter is connected with the circuit of output terminal of described programmable logic controller (PLC) PLC; The axle head of the clutch end of described threephase asynchronous machine downwards and be connected with described water pump; The water inlet end of described water pump is communicated with described water receptacle by described connecting pipe A; Described water level display device is transparent glass tube, described glass tube both ends open and vertically setting, and described glass tube top is water intake end, is communicated with the water side of described water pump by connecting pipe B; Described glass tube bottom is water side, is connected with one of three-way connection and leads to; Other two reduction of fractions to a common denominators of described three-way connection are not connected with pressure transducer and water receptacle, between described three-way connection and described water receptacle, are communicated with by ball valve, and described pressure transducer is connected with the signal input part circuit of described programmable logic controller (PLC) PLC.
5. the PID that a kind of application controls according to claim 1 and 2 unit is controlled regulates simulation teaching device, it is characterized in that: the power supply source in described subsidiary function module comprises power supply A (71) and power supply B (72), described power supply A (71) is connected with described stepper motor driver (31) circuit; Described power supply B (72) is connected with described programmable logic controller (PLC) PLC (1) circuit.
6. the PID that a kind of application controls according to claim 1 and 2 unit is controlled regulates simulation teaching device, it is characterized in that: described device body is framed structure, described device body is divided into four layers from top to bottom, and described stepper motor driver (31), programmable logic controller (PLC) PLC (1), water pump (2) and the described stepper motor matching with water pump (3) are located at top-down ground floor; Described frequency converter is located at threephase asynchronous machine described in the top-down second layer of described device body and is located at top-down the 3rd layer of described device body; The bottom of described device body is provided with described water receptacle (4); One side of the framework of described device body is vertically provided with described glass tube (5), and described glass tube (5) bottom joins by three-way connection (41) and described pressure transducer (6) and water receptacle (4).
7. a kind of application controls according to claim 3 unit is controlled PID regulates simulation teaching device, it is characterized in that: described ball valve instructional device in the time using state in closing or crack state.
8. the PID that a kind of application controls according to claim 1 unit is controlled regulates simulation teaching device, it is characterized in that: described device body adopts stainless steel material to make, and the framework upper of described device body is provided with pushing hands; The bottom of described device body is also provided with roller.
9. the PID that a kind of application controls according to claim 3 unit is controlled regulates simulation teaching device, it is characterized in that: described connecting pipe A (21) all adopts silica gel hose to be connected with water inlet end, the described connecting pipe B (22) of described water pump (2) with the junction of the water side of described water pump (2).
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| CN201310033615.XA CN103942996A (en) | 2013-01-23 | 2013-01-23 | PID (Proportion Integration Differentiation) adjustment simulation teaching device controlled by control unit |
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| CN201310033615.XA CN103942996A (en) | 2013-01-23 | 2013-01-23 | PID (Proportion Integration Differentiation) adjustment simulation teaching device controlled by control unit |
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