CN203588034U - Temperature detection experiment module based on PLC controller - Google Patents
Temperature detection experiment module based on PLC controller Download PDFInfo
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- CN203588034U CN203588034U CN201320699309.5U CN201320699309U CN203588034U CN 203588034 U CN203588034 U CN 203588034U CN 201320699309 U CN201320699309 U CN 201320699309U CN 203588034 U CN203588034 U CN 203588034U
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- plc controller
- temperature detection
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- detection experiment
- pcb board
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Abstract
The utility model discloses a temperature detection experiment module based on a PLC controller. The temperature detection experiment module comprises a PCB board and the PLC controller. The PCB board is provided with a terminal row. The PCB board is connected with input and output interfaces of the PLC controller through the terminal row. The PCB board comprises a DC-DC circuit, a signal detecting and voltage frequency converting circuit, a decoding latch and digital display circuit. The DC-DC circuit is externally connected with a power supply of the PLC controller. The signal detecting and voltage frequency converting circuit is connected with the input interfaces of the PLC controller through the terminal row. The decoding latch and digital display circuit is connected with the output interfaces of the PLC controller through the terminal row. The temperature detection experiment module based on the PLC controller is low in cost, the input and output interfaces are universal, usage is flexible and convenient, less PLC resource is occupied, and the temperature detection experiment module based on the PLC controller is convenient for teaching and has a good application prospect.
Description
Technical field
The utility model relates to a kind of temperature detection experiment module based on PLC controller, belongs to Programmable Logic Controller instructional technology field.
Background technology
In college teaching, PLC application technology is a technology specialty course that practicality is stronger, in the urgent need to theory and practice is combined, therefore, PLC experiment is the important step of PLC teaching, at present, the experiment based on PLC controller is above carried out conventionally on specific PLC experimental provision, and some problems below these PLC experimental provision ubiquities:
1) conventionally can only carry out the related experiment of basic logical order, be inconvenient to carry out some complicated functions as the related experiment of high-speed counter, mathematical operation and communication;
2) the available experimental project of experimental provision is limited, and such as lamp etc. is stepped in streamline, four layers of elevator, circulation, usable range is narrow;
3) price comparison of the PLC experimental provision of function more complicated is expensive;
4) along with remodeling and the upgrading of PLC controller, experimental provision originally is also scrapped thereupon, causes unnecessary waste.
Therefore, PLC and application technology constantly develop on the one hand, the problem that existing PLC experimental provision exists is more and more outstanding, and on the other hand, school also can not upgrade experimental provision frequently, under this background, the expansion module of the related experiment of research and development based on PLC controller, brings into play the effect of existing PLC experimental provision, develops that some are with strong points, comparatively complicated experimental project is just very necessary, is current urgent problem.
Utility model content
The purpose of this utility model is to overcome the deficiency that prior art exists, and the temperature detection experiment module based on PLC controller of the present utility model, can also complete the experiments such as frequency measurement, motor speed measurement.Powerful, cost is low, IO interface is general, flexible and convenient to use, take PLC controller resource few, convenient teaching, has a good application prospect.
In order to achieve the above object, the technical scheme that the utility model adopts is:
A kind of temperature detection experiment module based on PLC controller, it is characterized in that: comprise pcb board and PLC controller, described pcb board is provided with terminal row, the IO interface of described pcb board is connected with the IO interface of PLC controller by terminal row, described pcb board comprises DC-DC circuit, input and voltage frequency conversioning circuit, decoding is latched and digital display circuit, power supply on the external PLC controller of described DC-DC circuit, and will after voltage transitions, to pcb board, power, described input and voltage frequency conversioning circuit are connected with the input interface on PLC controller by terminal row, described decoding is latched and digital display circuit is connected with the output interface on PLC controller by terminal row.
The aforesaid temperature detection experiment module based on PLC controller, it is characterized in that: described input and voltage frequency conversioning circuit comprise temperature sensor, electric voltage frequency modular converter, timer module and analog switch module, described temperature sensor is connected with analog switch module by electric voltage frequency modular converter, described timer module is connected with analog switch module, and described analog switch module is connected with the input interface on PLC controller.
The aforesaid temperature detection experiment module based on PLC controller, is characterized in that: described analog switch module is also connected with keyswitch.
The aforesaid temperature detection experiment module based on PLC controller, it is characterized in that: described decoding is latched and digital display circuit comprises that four are latched Coding and driving module and four charactrons, four are latched the Coding and driving module output interface of external PLC controller respectively, and are connected with corresponding charactron.
The aforesaid temperature detection experiment module based on PLC controller, is characterized in that: described PLC controller is also connected with charactron by jumper switch.
The beneficial effects of the utility model are: the temperature detection experiment module based on PLC controller that the utility model provides, lead in the situation that not increasing analog input module, realization is to the detection of temperature and demonstration, can also complete the experiments such as frequency measurement, motor speed measurement, also can be used as detecting unit and the display unit of complex control system, cost is low, IO interface is general, flexible and convenient to use, take the feature that PLC resource is few, convenient teaching, has a good application prospect.
Accompanying drawing explanation
Fig. 1 is the system chart of the temperature detection experiment module based on PLC controller of the present utility model.
Fig. 2 is the circuit theory diagrams of input of the present utility model and voltage frequency conversioning circuit.
Fig. 3 is that decoding of the present utility model is latched and the circuit theory diagrams of digital display circuit.
Embodiment
Below in conjunction with Figure of description, the utility model is further described.
As shown in Figure 1, temperature detection experiment module based on PLC controller, comprise pcb board and PLC controller, pcb board is provided with terminal row, the IO interface of pcb board is connected with the IO interface of PLC controller by terminal row, PLC controller (can select the PLC controller of Siemens S7-200), pcb board comprises DC-DC circuit, input and voltage frequency conversioning circuit, decoding is latched and digital display circuit, power supply on the external PLC controller of DC-DC circuit, and will after voltage transitions, to pcb board, power, described input and voltage frequency conversioning circuit are connected with the input interface on PLC controller by terminal row, described decoding is latched and digital display circuit is connected with the output interface on PLC controller by terminal row.
Described DC-DC circuit, by consisting of LM2596-5 chip and peripheral cell, becomes 5V direct current by the 24V direct current of PLC controller, for each circuit on pcb board provides, controls electricity.
As shown in Figure 2, described input and voltage frequency conversioning circuit comprise temperature sensor U0 (model is AD590), electric voltage frequency modular converter U2 (model is LM331), timer module 3 (555 timers that model is LM555) and analog switch module U4 (model is MAX4662), temperature sensor is connected with analog switch module by electric voltage frequency modular converter, timer module is connected with analog switch module, described analog switch module is connected with the input interface on PLC controller, analog switch module is also connected with keyswitch, concrete connection is as follows, the port of temperature sensor U0 detected temperatures signal connects 7 pin of electric voltage frequency modular converter U2, 1 pin of electric voltage frequency modular converter U2 connects 1 pin of analog switch module U4, 1 pin of timer module U3 connects 8 pin of analog switch module U4, the 4 road output terminals of analog switch module U4 are connected with input interface corresponding to PLC controller, keyswitch S2, S3 connects 16 pin and 9 pin of analog switch module U4, 2 pin of analog switch module U4, 7 pin, 10 pin are also connected with the 24V power supply on PLC controller with 15 pin.
As shown in Figure 3, described decoding is latched and digital display circuit comprises that four are latched Coding and driving module U5, U6, U7, U8 (model is CD4511) and four charactron DS1, DS2, DS3, DS4 (can adopt common cathode number), four are latched the Coding and driving module output interface of external PLC controller respectively, and be connected with corresponding charactron, PLC controller is also connected with charactron by jumper switch, concrete connection is as follows, 8 railway digital amount output signals of PLC controller are through electric resistance partial pressure, and wherein 4 tunnel decoded signals connect and latch Coding and driving module U5, U6, U7, the input end of U8, other 4 tunnels connect respectively latchs Coding and driving module U5, U6, U7, the latch enable end of U8, latchs Coding and driving module U5, U6, U7, 7 sections of output (a of U8, b, c, d, e, f, g) receive respectively charactron DS1, DS2, DS3, the corresponding end of DS4, PLC controller also meets respectively charactron DS3 by DP1 and the DP2 signal wire of jumper switch JP1, the DP pin of DS2, can control hundred, the radix point of ten, to meet the requirement of range.
The course of work of the temperature detection experiment module based on PLC controller of the present utility model is as follows: it is example that PLC controller be take the PLC of Siemens S7-200, first the high-speed counter HSC0 mode of operation that defines S7-200 is single-phase increasing counting, high-speed counting signaling interface is input end I0.0, the current signal of temperature sensor U0 output is converted to voltage signal through resistance, pass through again RC filtering, electric voltage frequency conversion chip U1 in access electric voltage frequency modular converter U2, according to dut temperature, its output frequency can change at 3kHz ~ 10 kHz, this frequency signal is through analog switch module U4, signal is converted to the I0.0 end of 24V level access PLC controller S7-200, S7-200 can take interrupt timing mode, timing 100ms, real-time time arrives, by the value of computing counter, and correlation formula, can calculate dut temperature value, and latch and digital display circuit shows by decoding, timer module U3 and peripheral circuit have formed a frequency mode device, can export the square wave of a 5kHz, this signal has carried out level conversion by analog switch module U4, be linked into the input port of the high-speed counter of S7-200, as reference value, the data of the detection during with judgment experiment and the correctness of relative program.
The utility model, make full use of the function of the high-speed counter of PLC controller, in the situation that not increasing analog input module, realization is to the detection of temperature and demonstration, can also complete the experiments such as frequency measurement, motor speed measurement, also can be used as detecting unit and the display unit of complex control system, have that cost is low, IO interface is general, flexible and convenient to use, take the few feature of PLC controller resource, have a good application prospect.
More than show and described ultimate principle of the present utility model, principal character and advantage.The technician of the industry should understand; the utility model is not restricted to the described embodiments; that in above-described embodiment and instructions, describes just illustrates principle of the present utility model; do not departing under the prerequisite of the utility model spirit and scope; the utility model also has various changes and modifications, and these changes and improvements all fall within the scope of claimed the utility model.The claimed scope of the utility model is defined by appending claims and equivalent thereof.
Claims (5)
1. the temperature detection experiment module based on PLC controller, it is characterized in that: comprise pcb board and PLC controller, described pcb board is provided with terminal row, the IO interface of described pcb board is connected with the IO interface of PLC controller by terminal row, described pcb board comprises DC-DC circuit, input and voltage frequency conversioning circuit, decoding is latched and digital display circuit, power supply on the external PLC controller of described DC-DC circuit, and will after voltage transitions, to pcb board, power, described input and voltage frequency conversioning circuit are connected with the input interface on PLC controller by terminal row, described decoding is latched and digital display circuit is connected with the output interface on PLC controller by terminal row.
2. the temperature detection experiment module based on PLC controller according to claim 1, it is characterized in that: described input and voltage frequency conversioning circuit comprise temperature sensor, electric voltage frequency modular converter, timer module and analog switch module, described temperature sensor is connected with analog switch module by electric voltage frequency modular converter, described timer module is connected with analog switch module, and described analog switch module is connected with the input interface on PLC controller.
3. the temperature detection experiment module based on PLC controller according to claim 2, is characterized in that: described analog switch module is also connected with keyswitch.
4. the temperature detection experiment module based on PLC controller according to claim 1, it is characterized in that: described decoding is latched and digital display circuit comprises that four are latched Coding and driving module and four charactrons, four are latched the Coding and driving module output interface of external PLC controller respectively, and are connected with corresponding charactron.
5. the temperature detection experiment module based on PLC controller according to claim 4, is characterized in that: described PLC controller is also connected with charactron by jumper switch.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320699309.5U CN203588034U (en) | 2013-11-07 | 2013-11-07 | Temperature detection experiment module based on PLC controller |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320699309.5U CN203588034U (en) | 2013-11-07 | 2013-11-07 | Temperature detection experiment module based on PLC controller |
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| Publication Number | Publication Date |
|---|---|
| CN203588034U true CN203588034U (en) | 2014-05-07 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320699309.5U Expired - Fee Related CN203588034U (en) | 2013-11-07 | 2013-11-07 | Temperature detection experiment module based on PLC controller |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104000560A (en) * | 2014-05-26 | 2014-08-27 | 广东工业大学 | Control circuit of electronic thermometer for rapidly measuring human body temperature |
| CN105824287A (en) * | 2016-05-23 | 2016-08-03 | 成都四象联创科技有限公司 | Device for data test |
-
2013
- 2013-11-07 CN CN201320699309.5U patent/CN203588034U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104000560A (en) * | 2014-05-26 | 2014-08-27 | 广东工业大学 | Control circuit of electronic thermometer for rapidly measuring human body temperature |
| CN105824287A (en) * | 2016-05-23 | 2016-08-03 | 成都四象联创科技有限公司 | Device for data test |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140507 Termination date: 20161107 |