WO1995034822A1

WO1995034822A1 - Magnetic card type watthour meter and its calculating and controling system

Info

Publication number: WO1995034822A1
Application number: PCT/CN1994/000045
Authority: WO
Inventors: Yucun Ke; Dongmao Ye; Hongxuan Xia
Original assignee: Kedian Enterprises (China) Group Co. Ltd.
Priority date: 1994-06-15
Filing date: 1994-06-15
Publication date: 1995-12-21
Also published as: AU6967794A

Abstract

This invention relates to a magnetic card type watthour meter and its automatic calculating and controling system. According to the demand, the power supply department encode on the card that customer purchased the amount purchased power, the time of the peak period, the time of the valley period and the limited amount of the maximum current. The customer input the information written in the card into a single chip microprocessor by passing the card through the cards slot in the watthour meter, the control system of the watthour meter commanded by the microprocessor then controls the power supply automatically, calculates and collects the rate respectively according to different time periods.

Description

Magnetic card type watt-hour meter and its charging control system

Technical field

The invention relates to a magnetic card type watt-hour meter and its program-controlled charging system, in particular to a magnetic card type watt-hour meter using information read from a magnetic card for charging control and a magnetic card type watt-hour meter with the system. table. Background technique

At present, the widely used household and industrial energy meters are used first, and then the power supply department uses manual manual meter reading to collect ¾%, which is cumbersome and unreasonable. Electricity meters with reasonable control of electricity purchase before consumption have appeared in domestic and foreign markets. For example, the magnetic card type watt-hour meter disclosed in Chinese Utility Model Patent 92217385. After the computer processes the read magnetic card information, it controls the power supply and charges and charges at the same time.

The above-mentioned 92217385.0 patent uses digital technology to complete the intelligent automatic measurement and control of ordinary electricity meters. This well-known technique includes a sampling section, which is painted with black paint on the edge of the meter dial of an ordinary electric meter or has a slit. Hole) partly reflected (or not reflected) infrared light, and then converted the received light signal into an electrical pulse signal, which is digitized and input into a data processing device, and then sent to a single-chip microcomputer ^ U¾ line processing to complete the measurement Work; there is also a magnetic card transmission and reading control device, which performs directional constant speed control on the inserted magnetic card, and the magnetic card information input device reads the information on the magnetic card and sends the information to a single-chip microcomputer for processing; Micro-calculation controls the charging and power supply based on the information of beech and magnetic card information. In the event of leakage, power theft, etc., the alarm is triggered in a timely manner, and in normal times, the power consumption is automatically measured, charged and displayed.

At the same time, Chinese utility model patents 91220435. 4 and 92232890. 0 all describe magnetic card-type watt-hour meters controlled by a single-chip microcomputer. However, the power supply department often needs to make different adjustments to the user's electricity according to the specific conditions of various regions and different periods, and the existing energy meters cannot perform special operations such as peak power, The control of pricing and charging separately in the period of the valley and the average period can not limit the user's maximum current consumption. Therefore, the magnetic card transmission mechanism of the prior art, which is still very large in use, is also easily damaged, and the work is not reliable. Therefore, there is an urgent need for a way to change over time and region. Conveniently controlled watt-hour meters and their power supply and charging control systems adapted to the requirements of the power supply department. Disclosure of invention

An object of the present invention is to provide a magnetic card type watt-hour meter and a control system thereof, which can arbitrarily set the peak, trough and flat periods of power consumption according to the requirements of the power supply department, and automatically calculate the charges.

Another object of the present invention is to provide a magnetic card type watt-hour meter and a control system thereof that limit the maximum current consumption.

Still another object of the present invention is to provide a magnetic card type watt-hour meter and a control system thereof capable of automatically detecting a sampling failure.

Its purpose magnetic power meter control system of the present invention is further characterized by various control operations can be significant detail _β

A final object of the present invention is to use a card swipe method instead of a conventional magnetic card transfer mechanism, omitting the mechanical action part and improving reliability.

The control system of the present invention is used in combination with a conventional electric leather meter, thereby forming a magnetic card type electric meter that can be conveniently controlled according to the present invention.

The control system of the magnetic card type watt-hour meter of the present invention uses a single-chip microcomputer as a central control device, generates control signals according to signals from various peripheral devices to call preset programs, and issues instructions to each corresponding peripheral device, thereby completing Control of power supply. The control system of the present invention also includes the above-mentioned various peripheral devices, which are data processing devices for inputting measurement sampling information, magnetic card information and a pre-programmed control program Λ to the central control device, and the control generated by the central control device. The signal is output; the time setting device is used to complete the current time setting to send the internal timing information to the central control device; the display device is used to perform various displays in response to the output signal of the central control device; the alarm brake device is used to It operates in response to a control instruction issued by the central control device; and a backup power supply device is used to supply power to the entire control system in the event of a power failure to maintain various data in the volatile memory in the single-chip control system and maintain the display. This addictive control system is characterized in that it also includes:

The peak / valley charging device in the time setting device, based on the information from the magnetic card, divides the peak, valley, and peace time of the electricity in the current time that has been set, and according to different time periods according to the preset Increase, decrease, or parity charging mode for charging, and send a control signal to the central control device, so that the central control device drives the display device for real-time display;

Current-limiting device, used to detect the current value of current consumption from the measurement sampling signal and send it to the data processing device The data processing device compares the detected value with the set value input by the magnetic card to generate a maximum current limit control signal, and transmits the control signal to the central control device, and the central control device processes the signal in response to the signal ..

A program input device for inputting a pre-programmed control program and storing it in an EPROM (Electrically Erasable Read-Only Memory) so that the central control device calls the program in response to an external signal through a data processing device to perform a control action;

A card swipe device is used to replace the conventional magnetic card transmission mechanism, and uses a high-speed read and erase magnetic head to read and erase the manually swiped magnetic card information, and sends the read information to a data processing device; and

An auxiliary current sampler is used to continuously detect whether a current passes through the watt-hour meter, and generates an effective signal to send to the central control device, so as to determine whether the photoelectric converter is faulty and perform processing. The system is combined together, and the control system performs charging control on the magnetic card type watt-hour meter. Swipe the card to start the billing process such as installment billing, maximum current limit *, and check your own sampling. The magnetic card type watt-hour meter of the present invention has high integration, simple operation, high reliability, and can meet various special requirements of different power supply departments. Brief description of the drawings

FIG. 1 is a schematic diagram of a magnetic card type watt-hour meter with a charging control system of the present invention;

2 is a circuit block diagram of a charging control system according to the present invention;

3A and 3B are program flowcharts of the charging control system of the present invention;

4 is a flowchart of processing a sampling failure of a photoelectric converter according to the present invention;

5A and 5B are schematic diagrams of a swipe card according to the present invention. The best way to implement the invention

The magnetic card watt-hour meter and its charging control system of the present invention will be further described in detail with reference to the accompanying drawings and an embodiment, wherein:

In FIG. 1, the watt-hour meter (conventional sampling meter) 2 and the brake section 3 are well known to those skilled in the art, and will not be described in detail here. The control system 1 uses a general-purpose single-chip microcomputer (such as the D80 series) as a central control device, and is equipped with various peripheral devices according to the present invention. The control system 1, the watt-hour meter 2 and the brake section 3 are all assembled in the same case, and become a complete magnetic card-type watt-hour meter.

The charging control system of the magnetic card type watt-hour meter of the present invention will be described in detail below. In order to facilitate understanding, Describe the magnetic card used in the present invention. Magnetic cards are divided into two types: operative card and user card. The technician's card is used for initial setting after the meter is installed and before use. The user's card is purchased by the user from the power supply department. At the time of purchase, the power supply department uses a special punch machine to enter various required information on the user's magnetic card. Both the technician's card and the user's card input information into the control system of the magnetic card type watt-hour meter of the present invention by swiping the card.

Referring now to FIG. 2, the central control device 101 is composed of a general-purpose single-chip microcomputer, as long as it has general single-chip microcomputer functions, such as D80 series products. The central control device 101 is a core device. It inputs signals from various peripheral devices, and uses these signals as interrupt signals to call a program prepared according to the present invention, and generates further control signals according to the program flow to control various types of the entire billing control system. Make.

When assembling the magnetic card watt-hour meter, the technician enters a pre-programmed control program (which will be detailed below) into the billing control system of the present invention from the program input device 112 (for example, a healthy disk). The entered program is stored in EPROM 113. When the central control device 101 needs to call this program, it passes the data processing device 111 (this device is specially marked as an emphasis, of course, those skilled in the art should understand that this device can also be incorporated into the central control device 101 as a part of a single-chip microcomputer) The stored program in the EPROM 113 is read and sent to the central control device 111 for processing. The measurement sampling uses an infrared photoelectric converter to receive the infrared light reflected on the instrument dial to form an electrical pulse. The measurement sampling device 114 generates an electrical pulse. The electrical pulse is digitized in a subsequent touch-to-digital converter 115 to generate a digital signal. It enters the central control device 101 via the data processing device 111, and the central control device 101 controls the power measurement according to the received sampling signal. It should be particularly pointed out that the analog-to-digital converter 115 also sends the sampling signal to the current limiting device 116 which embodies the advantages of the present invention. The current limiting device 1164 compares the current current value obtained from the sampling signal received by the A / D converter 115 according to the maximum current limit value set in the user magnetic card signal from the data processing device 111. If the current current value If it is not greater than the maximum current limit value, the current limiting device 116 outputs a normal level, such as a low level. Once the current current value exceeds the maximum current limit value, the current limiting device 116 generates an operating level, such as a high level. This high-level signal enters the central control device 101 via the data processing device 111, and the central control device 101 outputs an operation instruction such as a brake alarm. It is worth mentioning that the control system of the magnetic card watt-hour meter of the present invention is also provided with an auxiliary sampler 118, which can be a current transformer located at the incoming or outgoing line of the watt-hour meter. When the meter is inducted, an effective signal is induced, and the signal is digitized by the A / D converter 115 and sent by the data processing device 1Π to the central control device 101. With the auxiliary beech device 118, once the metering and sampling device II ⁴ fails and cannot perform normal sampling, the auxiliary sampler 118 can still detect the current flowing through the electricity meter and generate "in-use" signal. Differential comparators in the data processing device 111 respectively receive signals from the A / D converter 115 Digitized sampling signal and "power in use" signal. Usually, these two signals are high (or low) level, and the differential comparator outputs a normal signal to the central control device 101. However, if the sampler fails, the sampling signal continues to have a low (or high) level, while the auxiliary sampler 118 still generates a high (or low) level of "power in use", which is the same as the signal level from the sampler 114 In contrast, the differential comparator generates an operation signal to the central control device 101, and the central control device 101 operates according to the flow shown in FIG. 4, which will be described below.

The magnetic card information input device 117 is in the form of a swipe card. The so-called card swipe means that the user manually feeds the card through the card swipe opening 31 and passes it at an arbitrary speed in the direction of the arrow Z, as shown in Figs. 5A and 5B. Of course, swiping the card in the opposite direction, or holding the magnetic card incorrectly, is invalid. The card swiping device is equipped with a high-speed information pickup magnetic head, which converts the weak magnetic signal into an electrical signal and amplifies it and then sends it to the data processing device 111. The data processing device 111 distributes it to each corresponding device, such as the peak and valley time information. The peak / valley charging device 122 sends the maximum current limit information to the current limit device 116, and other control information to the central control device 101. In this way, the user does not need to go through the traditional magnetic card transmission mechanism, and can simply send all the magnetic card information into the control system with a single swipe. After reading all the magnetic card information and verifying it without error, the central control device 101 sends an erasing instruction to the magnetic card input device 117 via the data processing device 111, then the erasing magnetic head is activated, eliminating all the information carried by the magnetic card, making it obsolete The card is collected by the power supply department before reuse. In this way, card input becomes convenient, fast, and reliable, eliminating the disadvantages of slow mechanical operation and poor reliability.

The time setting device 121 is used to set the time by a technician. It adopts the 24-hour clock, and only accepts the setting of "hour" and "minute", "second" is automatically set to "0". You must enter four digits when setting, for example:

0080—8: 00 am

1235--noon 12:35

1906-7: 6 pm

0005—0: 5 am.

The timer starts when the setting is completed. Note that the time input also uses the keypad in the program input device 112. This keypad is set inside the watch case and is packaged immediately after setting. The user cannot change it. The peak / valley charging device 122 divides the current time according to the magnetic card input information from the data processing device 111. According to the charging standard set in the input program, it charges and charges according to the three periods of peak, valley, and flat, and The central control device 101 sends billing information, and the central control device 101 issues an instruction to the display device for real-time display. This unique pricing method will be described in detail below with reference to FIGS. 3A and 3B.

The display driving device 131 drives the LED display 132 according to a control signal from the central control device 101. The LED display 132 is divided into two parts in the present invention, that is, light emitting diodes 3 ² (for example, 8 but only 5 are shown in FIGS. 5 A and 5B) and a seven-segment digital display 33 (for example, 7 digits), see FIG. 5A and 5B. Light two Diode ³² for displaying warning or fault, for convenience, these eight light emitting diodes are referred ERR_LED # 1 ~ ERR-LED # 8, the effect as shown in Table I:

Table I

LED number status.

1 usable degree is Q

2 Usable degrees are less than 5% of the last entry

3 The use current exceeds the maximum limit

4 Backup battery failure

5 Sampler failure

6 (reserved)

7 (reserved)

8 (reserved) Seven-segment digital display 33 can be shown in Table Π:

Table Π

Display mode-current limit: □□□□□ X X (two digits) *

'Peak time: ClxxCJxxn (from beginning to end) *

Trough time: ElxxCDxxC] (Beginning-Ending) *

User Number: X X X X X X X (seven digits)

Peak degree: □□□ X X X X (four digits)

Valley degree: □□□ X X X X (four digits)

Current time: X X □ X X X X (hours, minutes, seconds)

Available degrees: DDDxx X X (four digits) *

Those marked with "*" are input by the power supply department. Peak and valley degrees and current time are displayed in real time. The user number is 8 digits, and one card and one card correspond to each other, which is equivalent to the password. Only 7 digits are displayed. Through the function display set on the watch case, you can view the display content in sequence in the order shown in Table 11 and cycle through the display. The alarm device 141 is configured to emit an alarm sound in response to a signal sent from the central control device 101. For example, a buzzer may be used. The brake opening device 142 is also a well-known technology for cutting off power supply according to a signal from the central control device 101, and either a relay or a thyristor can be used.

The power supply 150 contains a backup battery to maintain data in volatile memory in the event of a power failure so that it can continue to work after power is restored. When a failure occurs (for example, the battery cannot be charged), the buzzer sounds and ERR-LED # 4 lights up. The user should notify the technician to replace it. The control system should be kept powered on during replacement. RESET> key to continue monitoring. If the user does not pay attention, after the power failure, the original stored data will disappear. After the power is turned on, it will be regarded as the first installation, and it needs to be reset and swiped. 12 (not shown) is used to zero the available power.

The inventor divided the rotating speed of the meter dial into three types, namely:

Every 300 revolutions of the meter dial is counted as 1 kWh, expressed as "3";

Electricity meter dial is counted as 1 kWh per 400 revolutions, expressed as "4";

Each turn of the electric meter dial is counted as 1 kWh, expressed as "5".

This setting is done by the technician during the initial phase. For example, if "3" is turned off, the information that the rotation speed is set to 300 revolutions / degree is input. At the same time, in order to limit the maximum current consumption, the inventors set the rotation speed monitoring values for different maximum current limits. The following table 1Π exemplifies the conversion of the meter speed and the maximum current limit into monitoring values (using 220 volts):

Once the speed of the watt-hour meter reaches or exceeds the monitoring value, the central control device 101 immediately generates an interruption control signal accordingly, and the control system enters the action sequence shown in FIG. 3B, which will be detailed below. In this way, when the rotating speed of the meter dial reaches the monitoring value per minute, the buzzer sounds, the fault indicator ERR-LED # 3 lights up, and the user presses the <ALM OFF> key (not shown) to turn off the buzzer. If it is still overloaded after one minute, the buzzer will sound again. If the overload is continued for five minutes, the brake will be turned off, and it will be automatically connected after one minute to continue power supply. After the watt-hour meter is powered on for the first time, the 7-segment digital display 33 all lights up to "8". After the technician swipes and sets the _b technician to swipe the card and is accepted, the 7-segment digital display 33 goes out and enters the setting state. At this time, the technician sets the control system as follows:

1. Time setting: 24-hour clock is used, as mentioned above.

2. Speed setting: As previously mentioned, select one of three speeds with "3", "4" or "5".

3. User ID: 8 digits in total, only 7 digits will be displayed after setting.

4. The automatic function display is displayed in the order shown in Table Π. Except for the time, speed and number set by the technician, all of them should show "0". After viewing, please stop at the display status of "Available Degrees". .

After the technician ’s obsessive action is completed, the user swipes the card again to enter the user ’s use stage. After entering the user ’s use phase, the technician can still enter the setting state by swiping the card, but can only change the time, speed and number. The following information should be included: 1. Number, 2. Number of purchases, 3. Degree of purchase, 4. Peak time, 5. Valley time, 6, Maximum current limit, 7. End code. The magnetic card number is also the magnetic card password. Each user has an 8-digit serial number password. The meter number is the same as the magnetic card number. Only read the magnetic card number and the number inside the machine, and then continue reading the information on the magnetic card. Otherwise, Ignore it. The number of purchases is set to prevent repeated card swipes. If the central control device 101 determines that this item is incorrect, it will ignore it. The end code is compiled to prevent the use of magnetic cards other than the control system standard. If this error occurs, the power will be turned off immediately. Only when the machine is disassembled and presses the <RESET> key on the circuit board will it resume operation.

After the first installation of the watt-hour meter, there is no "degree" available, so the seven-segment digital display 33 shows that the available number is "0", and the brake is turned off, and ERR-LED # 1 lights up.

After the user purchases the magnetic card from the power supply department, the magnetic card has recorded data information for controlling the user's power consumption, such as the degree of purchase, the maximum current usage, and the peak / valley time. Assume that the peak period of local power consumption is 6:00-8:00, 11: 00-13: 00, and 19:00-21:00 every day, and the period of ¼ ^ is 21: 00-6: 00 every day, and the rest of the time is Normal period; local power supply department's maximum current usage limit is 10 Ampere, if the speed of the instrument dial is set to 300 laps / degree, the monitoring value is set to 11 laps / minute, and it is recorded with N = ll. It is also assumed that this user purchased 50 kWh of electricity this time. Then, after the user returns home (assuming that the user is for civilian use, and industrial electricity is similar), as shown in FIGS. 5A and 5B, the magnetic card is swiped through the electricity meter. At this time, the program input from the program input device 112 and stored in the EPROM 113 is started. The following describes the fan in detail with reference to FIGS. 3A and 3B.

The central control device 101 first detects magnetic card identification information from the magnetic card input device 117. In step S1, identify whether the user number is consistent with the number stored in the phone. If they are not the same, ignore them; if they are the same, continue to check the number of purchases in step S2. If it is consistent with the information already stored in the aircraft, continue to proceed, otherwise it will be ignored. Read all magnetic card letters in step S3 and temporarily store them in the data processing device 111, and then determine whether the end code is correct in step S4. If it is correct, read these information and store them in the central control device 101, otherwise, The central control device JL01 outputs the opening brake command. Power off the power meter (S15). Then wait for the reset (<ESET>) key signal. If the reset signal is received, it will return to the beginning of the program and wait for the user to swipe the card repeatedly (S16). In step S5, the magnetic card degaussing command is output, and the erasing magnetic head is activated, so that the read user magnetic card becomes a waste card.

Next, the initial setting process is performed inside the control system 1. First, at step S6, the electricity purchased by the user is added to the previous margin (if any) and stored. ■ Then, in step S7, the central control device 101 sends the peak and valley times on the magnetic card to the peak / valley billing device 122 for 24-hour instalment setting.

In step S8, the central control device 101 sends the stored maximum current limit monitoring value (N = 11 in this example) to the current limiting device 116, so as to compare and judge the current current value at any time. Then exit A enters the program of Figure 4.

Next, as shown in FIG. 4, the central control device 101 detects whether a photoelectric converter has failed at step S101, which is performed by receiving a valid signal output from the differential comparator. If this valid signal is received, it is judged as YES in S1O1, and then the central control device 101 outputs alarm and brake instructions and lights ERR-LED # 5 (S102), and then waits for repair (S103); if it is judged as NO That is, the valid signal is not received, and then the procedure shown in FIG. 3B is performed from the exit B.

In FIG. 3B, at step S9, the central control device 101 determines whether the current speed has reached the maximum current. Limit monitoring value N, if yes, output alarm command and light ERR-LED # 3 (S17), and then wait for a predetermined time (for example, 1 minute) in step S18, then switch off the power (S19), in S ²⁰ another example delay waiting for a minute, and power is restored, the inlet into B, for which the process before the fan; ^ step S9 determines if the predetermined speed value is less than N, the routine continues downward, to start charging.

Central control device 101. In S10, it is judged whether the current time falls into the normal power consumption period (weekdays, 8: 00-17: 00 and 13: 00-19: 00 in this example), and if so, it proceeds to step S14. Normal standard billing, and drive 7-segment digital display 33 (for example, in the lower 4 digits) to display the normal billing situation, that is, use a kilowatt-hour meter to charge a kilowatt-hour electricity bill; if not, determine whether the current time falls within ¼ ^ period in step S11 (21: 00-6: 00), if yes, in step S12, the data processing device 111 sends a signal to the peak / valley charging device 122 that is currently in the valley period, and the peak / valley charging device 122 performs a preset procedure. The prescribed reduced-price charging method is used for charging. For example, the power consumption of 2 degrees can be counted as 1 degree (or 1.5 degrees). At the same time, the Shenyang control device 101 controls the display devices 131 and 132 to perform meter display (low 4). If the determination in step S11 is no, it is the peak power consumption period. The central control device 101 informs the peak / valley charging device 122 to charge according to the peak period in step S13, and the peak / valley charging device 122 follows the provisions of the preset program According to the mark-up charging method, for example, the power consumption of 1 degree (or 1.5 degrees) can be counted as 2 degrees, and the central control device 101 can be notified to drive the display (lower 4 digits). Among them, the end value of each period (such as 6 o'clock) can be counted into any time

After completing steps S12, S13, or S14, the central control device 101 deducts the used power at step S21 and displays the amount (that is, the degree) (for example, the lower 4 digits of the digital display 33). Then, in step S22, it is judged whether the remaining amount has reached 5% of the current purchase amount, which is 5 degrees in this example. At the same time, according to the present invention, the value of chirp must not be less than 5 degrees, which is an advantage of the present invention. If it is judged as YES in step S22, the central control device 101 issues an alarm command and lights up ERR-LED # 2 in step S23. Next, it is determined in step S24 whether the margin is used up. If it is used up, it is performed in step S25. Output the brake command and light up ERR-LED # 1; If it has not been used up, or if it is judged as NO in step S22, the program returns to the entrance A, and it is executed repeatedly. Industrial applicability

The use of the magnetic card type watt-hour meter and the charging control system according to the present invention has a very obvious and excellent effect on alleviating the shortage of power during peak periods and strengthening the distribution and control of power by the power supply department. This kind of control system is simple and reliable to use, flexible to set, and can effectively control according to the requirements of different regions, different departments and power supply departments at different times.

The present invention discloses the specific operation mode of such a control system in the form of an embodiment, but those skilled in the art will understand that details can be modified without departing from the spirit and scope of the present invention, but these Both are defined by the appended claims.

Claims

1. A charging control system for a magnetic card type watt-hour meter, comprising:

— A central control device with a single-chip microcomputer as the core, generates control signals based on signals from various peripheral devices, and calls a pre-programmed control program to instruct each corresponding peripheral device to operate, thereby completing power supply control and billing;

A data processing device, configured to input measurement sampling information, magnetic card information, and a control program preprogrammed from the photoelectric converter to the central control device, and output a control signal generated by the central control device;

A time setting device for setting the current time so as to send internal timing information to the central control device;

A display device for performing various displays in response to an output signal of the central control device; an alarm brake device for responding to a control command issued by the central control device to perform an alarm or a brake power-off operation;

A backup power supply device is used to supply power to the entire control system in the event of a power failure to maintain the various data of the volatile memory in the single-chip microcomputer control system and maintain the display;

It is characterized in that the control system also includes:

Valley billing device, which uses the information from the magnetic card to divide the peak, valley, and peace time in the current time that has been set, and under the control of the central control device, according to different time-segments according to the preset Set up a price increase, reduction or parity charging mode for charging, and at the same time send a control signal to the central control device, so that the central control device drives the display device to perform real-time display;

-Current limiting device, which is used to detect the current electric current value from the measurement sampling signal and send it to the data processing device. The data processing device compares the detected value with the setting value input by the magnetic card to generate the maximum value. The current limit control signal is transmitted to the central control device, and the central control device processes the signal in response to the signal;

'A program input device for inputting a control program prepared in advance and stored in an EPROM (electrically read-only memory), so that the central control device calls the program in response to an external signal through a data processing device to perform Control action

A card swipe device is used to replace the conventional magnetic card conveyor, and use high-speed reading and wiping magnetic head to manually The swiped magnetic card information is read and erased, and the read information is sent to the data processing device; and an auxiliary current sampler is used to continuously detect whether there is a current through the electricity meter and generate a valid signal to send to the fan center The control device is used to judge whether the sampling of the photoelectric converter is faulty, and to perform processing.

2. The charging control system as claimed in claim 1, characterized in that the magnetic card information read by the card swiping device includes: number, number of purchases, degree of purchase, peak time, valley time, maximum current limit, and end code.

3. The charging control system according to claim 1, characterized in that the central control device checks the magnetic card information of the entered fan number, number of purchases, and end code, and reads all magnetic card information only when it is correct Erase the information you have read.

4. The charging control system as claimed in claim 3, characterized in that, if the end code is incorrect, the central control device outputs a power-off instruction for opening the brake.

5. The charging control system according to claim 1, wherein the central control device controls the peak / valley charging device to perform 2 ⁴ based on the peak time and valley time read from the magnetic card. Hour time segment setting.

6. The charging control system according to claim 5, characterized in that the central control device determines whether the current time falls into a peak period, a valley period or a flat period during the power supply process, and controls the peak / valley charging device respectively Charges are charged. °,

The charging control system according to claim 6, characterized in that if it is determined that the current time falls within the flat time period, the central control device performs normal charging and issues a display instruction.

The charging control system according to claim 6, characterized in that if it is judged that the current time falls within the trough period, the central control device instructs the peak / valley charging device to perform a price reduction. Fee and issue display instructions.

9. The charging control system according to claim 6, characterized in that if it is determined that the current time falls within the peak period, the central control device instructs the fan / valley charging device to perform charge-up charging and sends out Show instructions.

The charging control system according to claim 8 or 9, characterized in that the ratio of the increased charge or reduced charge can be arbitrarily set.

11. The charging control system according to claim 1, characterized in that the central control device automatically deducts the power consumption after charging, and issues a volume display instruction.

12. The charging control system as claimed in claim 11, characterized in that said central control device judges whether the amount of electricity has reached 5% of the latest electricity purchase amount, and if it reaches this value, it outputs an alarm instruction and a display instruction, such as If the amount of water is used up, the brake power-off instruction is output.

13. The charging control system according to claim 12, characterized in that the remaining power consumption is set to not less than 5 degrees.

14. The charging control system according to claim 1, wherein the current limiting device uses magnetic card input information from the maximum current limit monitoring value of the data processing device to monitor the power consumption current during the entire charging process. Whether the monitoring value is reached, and if the value is reached, an effective signal is output to the central control device.

15. The charging control system as claimed in claim 14, characterized in that said maximum current limit monitoring value can be set to the speed of the meter panel (N group / minute), where N is natural

16. The charging control system according to claim 15, wherein the value N can be arbitrarily set according to the needs of the power supply department.

17. The charging control system according to claim 14, characterized in that the central control device outputs an alarm command and a display command after receiving the valid signal from the fan stream device, and delays Wait for the user to reduce the power consumption. If the user does not reduce the power consumption, output the brake command.

18. The charging control system according to claim 17, wherein after the brake is turned off, the central control device can issue a power restoration instruction after a delay.

19. The charging control system according to claim 1, characterized in that the auxiliary sampler continuously outputs a "power in use" signal to the differential comparator in the data processing device during the power supply process. .

20. The charging control system according to claim 19, wherein when the photoelectric converter fails, the differential comparator outputs an effective signal to the central control device, and the central control device sends out Brake instruction and display instruction.

The charging control system according to claim 20, wherein the central control device issues a power restoration command only after the photoelectric converter is repaired.

22. The charging control system according to any one of claims 7, 8, 9 or 11, characterized in that said display instruction is sent to a seven-segment digital display.

23. The charging control system according to any one of claims 12, 17 or 20, wherein the display instructions are sent to respective light emitting diodes.

24. The charging control system according to claim 1, wherein the card swiping device is equipped with a high-speed reading and wiping head.

25. The charging control system according to claim 1, wherein the preprogrammed program input by the program input device can be modified.

26. The charging control system according to claim 1, wherein the data processing device may be part of a central control device. ·

27. A magnetic card type watt-hour meter, characterized in that it consists of a common watt-hour meter sampling meter and a charging control system, which includes:

A central control device with a single-chip microcomputer as the core, generates control signals according to signals from various peripheral devices, and calls a pre-programmed control program to instruct each corresponding peripheral device to operate, thereby completing power supply control and billing;

A data processing device for inputting the measurement sampling information, the magnetic card information and the preprogrammed control program from the photoelectric converter to the central control device, and outputting the control signal generated by the central control device;

A time setting device for setting the current time so that the internal timing information is sent to the central control device;

A display device for performing various displays in response to an output signal of the central control device; an alarm brake device for responding to a control command issued by the central control device to perform an alarm or brake power failure operation;

A peak / valley charging device, which divides the peak, valley, and weekdays of electricity use in the set current time according to the information from the magnetic card, and controls it according to different time periods under the control of the central control device. Calculate and charge according to a preset markup, markdown or parity charging mode, and simultaneously send a control signal to the central control device, so that the central control device drives the display device to perform real-time display;

— Pgen current device, which is used to detect the current electricity current value from the metering number and send it to the data processing device. After comparing the detected value with the set value input by the magnetic card in the data processing device, A maximum current limit control signal is generated and transmitted to the central control device, and the central control device processes the signal in response to the signal;

A program input device for inputting a control program prepared in advance and stored in EPROM

(Electrically erasable read-only memory), so that the central control device calls the program in response to an external signal through the data processing device to perform a control action;

-A card swipe device, which replaces the conventional magnetic card conveyor, and uses high-speed reading and wiping magnetic heads to read and erase manually swiped magnetic card information, and sends the read information to a data processing device; and An auxiliary current sampler is used to continuously detect whether a current passes through the watt-hour meter, and generates an effective signal to send to the central control device, so as to determine whether the photoelectric converter sampling is faulty and make processing.

28. The magnetic card type watt-hour meter according to claim 27, wherein said data processing device is a part of a central control device.

29. The magnetic card type watt-hour meter as claimed in claim 27, characterized in that the magnetic card information is input by a card swiping method.

30. The magnetic card type watt-hour meter according to claim 27, wherein the central control device and the peak / valley charging device automatically perform time segmentation based on peak time and valley time read from the magnetic card, The charging is performed according to the charging mode of peak price increase, valley price reduction, and flat price parity set by the pre-programmed program input by the program input device and displayed in real time.

31. The magnetic card type watt-hour meter according to claim 27, wherein the central control device and the current limiting device automatically complete the current limit power supply according to the maximum current limit information read from the magnetic card.

32. The magnetic card type watt-hour meter as claimed in claim 27, characterized in that the automatic detection of the failure of the photoelectric beech device is completed by means of the auxiliary sampler.

33. The magnetic card type watt-hour meter according to claim 27, wherein the display device can display various charging and control conditions in detail.