CN202795821U - Intelligent remote meter reading simulation teaching device - Google Patents
Intelligent remote meter reading simulation teaching device Download PDFInfo
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- CN202795821U CN202795821U CN 201220531067 CN201220531067U CN202795821U CN 202795821 U CN202795821 U CN 202795821U CN 201220531067 CN201220531067 CN 201220531067 CN 201220531067 U CN201220531067 U CN 201220531067U CN 202795821 U CN202795821 U CN 202795821U
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Abstract
The utility model relates to an intelligent remote meter reading simulation teaching device which includes a single chip microcomputer, and based on basic setting, the single chip microcomputer is connected with a power utilization simulation circuit. The power utilization simulation circuit includes a multiplexer switch and a power utilization circuit which is composed of multiple light emitting diodes and simulates the power utilization of electrical appliances. The circuit structure of the device is simple and practical. The device enables a user to conveniently understand the basic principle of the intelligent remote meter reading, the common display, button, A/D, and communication of the system, and the entire development process including compiling, program download, and debugging; to become familiar with the inner configuration and the integrated external arrangement of the single chip microcomputer; the IO control and the parallel bus control of the single chip microcomputer; the common three-line series bus and two-line serial bus time sequential chart and program design of the single chip microcomputer system; and the communication mechanisms of RS232 and RS485. The students can understand the design of the host computer interface, and the communication protocol designs of the host computer and the slave computer.
Description
Technical field
The utility model relates to a kind of simulated intelligence remote meter reading teaching device, belongs to a kind of teaching aid about Development of Single-chip Computer System.
Background technology
At present, the meter reading method of China has following three kinds: 1. manually register one's residence and check meter; 2.IC card prepayment mode; 3. remote meter reading mode.Manually registering one's residence checks meter not only expends a large amount of and manpower, and mistake occurs easily, and because the transformation of user's idea, the user does not wish to be bothered by others.IC-card then is subjected to easily outside world and cracks.This dual mode can not be realized the Real Time Monitoring to the ammeter duty.Along with expanding economy, following China is actual electricity charge count by time sharing gradually in addition, and to reach energy efficient, to realize the low-carbon (LC) an aim in life, front dual mode does not catch up with the needs of power automation development far away.In school, how the principle of the remote meter reading mode mode by simulation is applied in the teaching, make this technical ability of the skilled grasp of student, and to serve society by this technical ability be the problem that the teacher considers.Therefore, setting up a kind of teaching simulating device is instructors problem in the urgent need to address.
Summary of the invention
The purpose of this utility model is to propose a kind of simulated intelligence remote meter reading teaching device, belongs to a kind of teaching aid about Development of Single-chip Computer System.
To achieve these goals, the technical solution of the utility model is: a kind of simulated intelligence remote meter reading teaching device, include a single-chip microcomputer, center on the remote communication interface circuit that single-chip microcomputer is connected with respectively clock circuit, display and is communicated with host computer; Wherein, described single-chip microcomputer also is connected with the electricity consumption mimic channel, described electricity consumption mimic channel comprises multidiameter option switch and by the power circuit of a plurality of light emitting diode analog electronics electricity consumption, described selector switch and power circuit connect respectively single-chip microcomputer, selector switch by single-chip microcomputer select a plurality of light emitting diodes respectively with power connection and shutoff, be provided with the simulated power sampling resistor between described a plurality of light emitting diodes and power supply, the sampled signal of described sampling resistor is connected to single-chip microcomputer by A/D converter.
Further, described remote communication interface circuit is RS232 or RS485 interface circuit.
Further, described multidiameter option switch is comprised of eight road signal transceivers and eight road buttons, eight road buttons connect eight road signal input parts of eight road signal transceivers, eight road output terminals of eight road signal transceivers are connected with the data bus of single-chip microcomputer, described power circuit comprises eight road d type flip flops, the input end of eight road d type flip flops is connected with the data bus of single-chip microcomputer, the light emitting diode of described analog electronics electricity consumption is eight, eight light emitting diode negative poles are connected with the output terminal of eight road d type flip flops through eight resistance respectively, the anode of eight light emitting diodes is in parallel, described simulated power sampling resistor one end of the anodic bonding of the light emitting diode after the parallel connection, the simulated power sampling resistor other end connects power supply, the control end of described eight road d type flip flops with are connected the control end of road signal transceiver and are connected with the control end of single-chip microcomputer by code translator.
Further, be provided with the analog power switch between the described simulated power sampling resistor other end and the power supply, described analog power switch comprises a relay that is driven by triode, the normally opened contact one end connecting analog power samples resistance of relay, the normally opened contact other end of relay connects power supply, and the control base stage of described triode is connected with the control end of single-chip microcomputer.
Further, described single-chip microcomputer also is connected with a warning circuit that is comprised of hummer and triode driving.
The utility model circuit structure is simple, practical, can understand very easily the ultimate principle that intelligent remote is checked meter by the utility model, hardware design and the software development of Single Chip Microcomputer (SCM) system be can understand, the common demonstration of Single Chip Microcomputer (SCM) system, button, A/D, communication etc. are familiar with; Understand Single Chip Microcomputer (SCM) system from the principle diagram design to making sheet, from program design to engineering foundation, compiling, program download, a whole set of development process of debugging; Be familiar with the inside structure of single-chip microcomputer, integrated peripheral hardware etc.; Be familiar with IO control, the parallel bus control of single-chip microcomputer; Be familiar with sequential chart and the program design of three common wire serial bus of Single Chip Microcomputer (SCM) system, two-wire serial bus; Be familiar with the communication mechanism of RS232, RS485 etc.In addition, this device also comprises upper computer software design, can make the student understand the design at host computer interface and the design of the communications protocol of host computer and slave computer.
Below in conjunction with drawings and Examples the utility model being done one describes in detail.
Description of drawings
Fig. 1 is circuit structure block diagram of the present utility model;
Fig. 2 is the utility model electricity consumption mimic channel synoptic diagram;
Fig. 3 is the utility model embodiment 2 electricity consumption mimic channel synoptic diagram.
Embodiment
A kind of simulated intelligence remote meter reading teaching device, referring to Fig. 1 and Fig. 2, described device includes a single-chip microcomputer 1, centers on the remote communication interface circuit 5 that single-chip microcomputer is connected with respectively clock circuit 2, display 3 and is communicated with host computer 4; Wherein, described single-chip microcomputer also is connected with electricity consumption mimic channel 6; Described electricity consumption mimic channel comprises the multidiameter option switch 6-1 that is comprised of a plurality of button K and by the power circuit 6-2 of a plurality of light emitting diode D analog electronics electricity consumption, described selector switch and power circuit connect respectively single-chip microcomputer, selector switch by single-chip microcomputer select a plurality of light emitting diodes respectively with power connection and shutoff, be provided with simulated power sampling resistor R1 between described a plurality of light emitting diodes and power supply, the sampled signal of described sampling resistor is connected to single-chip microcomputer by A/D converter 7.
Among the embodiment, described remote communication interface circuit is RS232 or RS485 interface circuit, and the chip of use is respectively MAX485 interface chip and MAX232 interface chip.RS232 can realize point-to-point communication mode, but this mode can not realize network savvy, and communication distance can not be distal to 15 meters.RS-485 adopts balance to send and differential received, therefore has the ability that suppresses common mode interference.Signal transmission adds that bus transceiver has high sensitivity, can detect the voltage that is low to moderate 200mV, so can be restored beyond km.Very convenient when RS-485 is used for multi-point interconnection, can save many signal wires.Use the RS-485 formation distributed system of can networking.RS-485 adopts half-duplex operation, whenever can only have any to be in the transmission state, and therefore, transtation mission circuit must be controlled by enable signal.
Among the embodiment, described single-chip microcomputer model is STC12C5A60S2, and single-chip microcomputer STC12C5A60S2 has dual serial mouth UART(Universal Asynchronous Receiver/Transmitter, Universal Asynchronous Receiver ﹠ dispensing device).In native system, the 1st serial port is set to the RS232 serial communication interface, and the 2nd serial port is set to RS232 serial communication interface or RS485 serial communication interface, can be selected by wire jumper; The A/D converter of the inner integrated 10bit of STC12C5A60S2.Described display is one 12864 liquid crystal display, and this liquid crystal display adopts the ST7290 controller, can select 8,4 bit parallel interface or serial line interfaces, and 8192 Chinese fonts (16 * 16 dot matrix) and 128 western language characters (16 * 8 dot matrix) are provided.Circuit board provides wire jumper to select the serial or parallel interface, and native system has adopted 8 bit parallel interfaces, is mounted on the bus.And drive the control LCD backlight by independent IO by triode.Described clock circuit is a real-time timepiece chip DS1302; DS1302 is a kind of high-performance of releasing of U.S. DALLAS company, the real-time timepiece chip of low-power consumption, it can to year, month, day, week, the time, minute, second carries out timing, and has the leap year compensate function.It adopts three-wire interface and CPU to communicate, and has the two pins of primary power/back-up source, has guaranteed that real-time clock continues operation after primary power source de-energizes, and the ability of back-up source being carried out the thin current charges of tiny stream is provided simultaneously.
Present embodiment is the improvement of carrying out on the basis of embodiment 1, and the part identical with embodiment 1 in the present embodiment please refer among the embodiment 1 disclosed content and understand, and embodiment 1 disclosed content also should be as the content of present embodiment.
In the present embodiment, referring to Fig. 3, described multidiameter option switch is by eight road signal transceiver 6-1-1(74HC245) and eight road buttons form, eight road buttons connect eight road signal input parts of eight road signal transceivers, eight road output terminals of eight road signal transceivers are connected with the data bus 1-1 of single-chip microcomputer, described power circuit comprises eight road d type flip flop 6-2-1(74HC574 chips), the input end of eight road d type flip flops is connected with the data bus of single-chip microcomputer, the light emitting diode of described analog electronics electricity consumption is eight, eight light emitting diode negative poles are connected with the output terminal of eight road d type flip flops through eight resistance R 2 respectively, the anode of eight light emitting diodes is in parallel, described simulated power sampling resistor one end of the anodic bonding of the light emitting diode after the parallel connection, the simulated power sampling resistor other end connects power supply, and single-chip microcomputer calculates the user power utilization change of power consumption according to sampling resistor; The control end of described eight road d type flip flops with are connected the control end of road signal transceiver by alternative sheet code translator 8(74HC138) be connected with the control end of single-chip microcomputer.
Among the embodiment, be provided with the analog power switch between the described simulated power sampling resistor other end and the power supply, described analog power switch comprises a relay J that is driven by triode Q1, the normally opened contact one end connecting analog power samples resistance of relay, the normally opened contact other end of relay connects power supply, and the control base stage of described triode is connected with the control end of single-chip microcomputer.
Among the embodiment, described single-chip microcomputer also is connected with a warning circuit that is comprised of hummer F and triode Q2 driving, and described alarm links to each other with CPU and reads the electricity consumption value of CPU record, sends warning according to default value.
Triode among the embodiment is that model is 9013 NPN triode.
The resistance of the analog electronics electricity consumption in the present embodiment is used for the electrical equipment of analog family, light emitting diode is connected on the bus by a slice 74HC574 as user's lamp, the contact of relay connects common anode end and the power supply of user's lamp, is used for the master switch of analog family power supply.By gathering user's lamp common anode terminal voltage, through sampling resistor, can calculate the power consumption of user's lamp, be modeled as the power consumption of household electricity.Button among the embodiment is for the switch of analog family electrical equipment.It is connected on the bus by a slice 74HC245, corresponds respectively to some user's lamps.
The described device of present embodiment take single-chip microcomputer as core, has been simulated a cover intelligent remote meter copying device.This device slave computer partial simulation user power utilization and ammeter, comprise user's simulation electricity consumption, the sampling of analog electrical power, the setting of time-division charge rate, rate and current electric power by current slot, calculate the current electricity charge, and real-time deducting from active user's amount of money, when insufficient in amount, can cut off customer power supply; Epigynous computer section is then simulated Utilities Electric Co., the inquiry of purchasing electricity, user power utilization situation that can completing user, the setting of time-division charge rate, and can according to circumstances cut off manually or automatically or connect customer power supply.
Claims (5)
1. a simulated intelligence remote meter reading teaching device includes a single-chip microcomputer, centers on the remote communication interface circuit that single-chip microcomputer is connected with respectively clock circuit, display and is communicated with host computer; It is characterized in that, described single-chip microcomputer also is connected with the electricity consumption mimic channel, described electricity consumption mimic channel comprises multidiameter option switch and by the power circuit of a plurality of light emitting diode analog electronics electricity consumption, described selector switch and power circuit connect respectively single-chip microcomputer, selector switch by single-chip microcomputer select a plurality of light emitting diodes respectively with power connection and shutoff, be provided with the simulated power sampling resistor between described a plurality of light emitting diodes and power supply, the sampled signal of described sampling resistor is connected to single-chip microcomputer by A/D converter.
2. a kind of simulated intelligence remote meter reading teaching device according to claim 1 is characterized in that, described remote communication interface circuit is RS232 or RS485 interface circuit.
3. a kind of simulated intelligence remote meter reading teaching device according to claim 1, it is characterized in that, described multidiameter option switch is comprised of eight road signal transceivers and eight road buttons, eight road buttons connect eight road signal input parts of eight road signal transceivers, eight road output terminals of eight road signal transceivers are connected with the data bus of single-chip microcomputer, described power circuit comprises eight road d type flip flops, the input end of eight road d type flip flops is connected with the data bus of single-chip microcomputer, the light emitting diode of described analog electronics electricity consumption is eight, eight light emitting diode negative poles are connected with the output terminal of eight road d type flip flops through eight resistance respectively, the anode of eight light emitting diodes is in parallel, described simulated power sampling resistor one end of the anodic bonding of the light emitting diode after the parallel connection, the simulated power sampling resistor other end connects power supply, the control end of described eight road d type flip flops with are connected the control end of road signal transceiver and are connected with the control end of single-chip microcomputer by code translator.
4. a kind of simulated intelligence remote meter reading teaching device according to claim 3, it is characterized in that, be provided with the analog power switch between the described simulated power sampling resistor other end and the power supply, described analog power switch comprises a relay that is driven by triode, the normally opened contact one end connecting analog power samples resistance of relay, the normally opened contact other end of relay connects power supply, and the control base stage of described triode is connected with the control end of single-chip microcomputer.
5. a kind of simulated intelligence remote meter reading teaching device according to claim 1 is characterized in that, described single-chip microcomputer also is connected with a warning circuit that is comprised of hummer and triode driving.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220531067 CN202795821U (en) | 2012-10-17 | 2012-10-17 | Intelligent remote meter reading simulation teaching device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220531067 CN202795821U (en) | 2012-10-17 | 2012-10-17 | Intelligent remote meter reading simulation teaching device |
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| CN202795821U true CN202795821U (en) | 2013-03-13 |
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| CN 201220531067 Expired - Fee Related CN202795821U (en) | 2012-10-17 | 2012-10-17 | Intelligent remote meter reading simulation teaching device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105842648A (en) * | 2016-01-21 | 2016-08-10 | 贵州电网有限责任公司遵义供电局 | Self-service comparison service terminal for single-phase energy meter and comparison and re-check method |
| CN106247942A (en) * | 2016-09-21 | 2016-12-21 | 深圳职业技术学院 | Infrared accurate measurement instrument device |
-
2012
- 2012-10-17 CN CN 201220531067 patent/CN202795821U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105842648A (en) * | 2016-01-21 | 2016-08-10 | 贵州电网有限责任公司遵义供电局 | Self-service comparison service terminal for single-phase energy meter and comparison and re-check method |
| CN106247942A (en) * | 2016-09-21 | 2016-12-21 | 深圳职业技术学院 | Infrared accurate measurement instrument device |
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| 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 |
Granted publication date: 20130313 Termination date: 20151017 |
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| EXPY | Termination of patent right or utility model |