RU2234705C2 - Ampere hours counter with portable control panel - Google Patents

Abstract

FIELD: measuring equipment engineering.

SUBSTANCE: device has current and voltage transformers, proportional amplifier and portable portion. Into stationary portion additionally included are second current transformer, two instrumental amplifiers, first microcontroller, real-time clock with autonomous power source, power control module, power source block, first module of conversion of levels and galvanic decoupling, controlled chemical current source, first power-independent memory and temperature sensor, while portable portion is made in form of portable control panel with possible attachment-detachment to stationary portion by means of connecting cable and has a keyboard, module for transforming and stabilizing power voltage, built-in chemical current source, second microcontroller, real-time clock, second power-independent memory, indication module and second module for conversion of levels and galvanic decoupling.

EFFECT: lower power consumption with power from controlled chemical current source, etc.

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Description

The invention relates to measuring equipment and can be used in power supply systems for floating and coastal navigation lights, maintenance-free railway crossings, in aviation, space and other industries where it is necessary to monitor and maintain chemical current sources (CES).

Known ampere-hour counter (SAC) [1], containing a contact current transducer - a shunt included in the controlled circuit, an input amplifier, an integrating capacitor, a comparing device, a multivibrator, a driver, a key, a ten-day divider and a reading device.

The voltage removed from the shunt is converted by the input amplifier into current, which charges the integrating capacitor. When the voltage reaches the threshold level of the capacitor, the comparator starts the multivibrator, including the key, through which the capacitor is discharged. The cycle repeats, the received pulses through the shaper arrive at the decade-long divider.

The disadvantage of the described HAS is the lack of protection against failures in the decade-long divider, which can distort the measurement result, as well as the inability to switch to low consumption or “sleep” mode without data loss when powered by a controlled HIT.

The known ampere-hour counter [2], to increase the reliability of which registers, comparison and recording control devices are introduced, compares the numbers in the pulse counter and registers and records the number that gave the correct result when comparing.

The disadvantage of this device is the reset of information during short-term power failure, the impossibility of organizing a mode of low consumption, the lack of the possibility of accumulating statistics on the operation of HIT.

Closest to the proposed invention (prototype) is a device for measuring the flow of electrical energy [3], which consists of stationary and portable parts. The stationary part consists of a current and voltage converter, a multiplier unit, a proportional amplifier, a low-pass filter, a voltage-frequency converter, an electronic pulse counter and a mechanical pulse counter. The portable part is a portable unit for reading the exact value of the consumed energy from the electronic meter and a portable unit for entering the initial value into the electronic meter. In this device, the power of the meter is autonomous and has a shock-free transition to battery power, it has an accurate and coarse reading.

The disadvantages of this device are:

- the presence of two portable units for reading information and entering the initial value of the counter;

- the inability to organize the accumulation of statistics on operating modes and parameters of a controlled chemical current source (CIT);

- the impossibility of transferring to a mode of reduced consumption or “sleep” without data loss when powered by a controlled HIT.

The objective of the invention is:

- reducing power consumption when powered by a controlled HIT by transferring the HAS to a low-power mode or a “sleep” mode with a programmable wake-up time;

- accumulation in non-volatile memory of information on consumed energy with a cumulative total and separately - for each last year, for each month of the last year, for every day of the last month, for every hour of the last day;

- temperature control with recording in the non-volatile memory of the maximum and minimum values;

- voltage control;

- password-protected access when calibrating the channels for measuring the load current, self-consumption current and voltage.

The problem is solved with the help of an SAC with a portable control panel, consisting of a stationary part containing current and voltage converters, a proportional amplifier, a portable part, a second current converter, two instrumental amplifiers, the first microcontroller, a real-time clock with autonomous power supply are additionally introduced into the stationary part , a power management module, a power supply, a first level conversion and galvanic isolation module, wherein the second current converter is connected to the first terminal it is connected to the negative terminal of the controlled chemical current source, and the second terminal to the load circuit, the output of the second current converter through the instrument amplifier is connected to the input of the first microcontroller, the first terminal of the second current converter is connected to the first terminal of the first current converter, the second terminal of which is connected to the common wire devices, and the output through the second instrumental amplifier to the second input of the first microcontroller, the third input of the first microcontroller is connected to the proportional output a single amplifier, the input of which is connected to the output of a controlled voltage converter, the first input of which is connected to the positive terminal of the controlled chemical current source, and the second to the first output of the first microcontroller, which is connected to a real-time clock with autonomous power supply, the output of which is connected to the first control input power management module, the input of which is connected to the positive terminal of the controlled chemical current source, and the output is connected to the input of the power supply, the second control input of the mod For power management, it is connected to the second output of the first microcontroller, the first level conversion and isolation module is connected on the one hand to the first microcontroller and, on the other hand, to the output terminals of the stationary part, and the control output of the first level conversion and galvanic isolation module is connected to the third control input power management module and the fourth input of the first microcontroller, and the first microcontroller is connected to the first non-volatile memory and temperature sensor, and The main part, made in the form of a portable control panel with the ability to disconnect / connect to a stationary one using a connecting cable, contains a keyboard connected to a power conversion and stabilization module, the first input of which is connected to the terminals for connecting an external power source, the second with an integrated chemical a current source, the third - with the output of the second microcontroller, and the output is connected to the first input of the second microcontroller, and at the control inputs / outputs of the second microcontroller p is connected to a real-time clock connected to an integrated chemical current source, a second non-volatile memory, an indication module, and through a second level conversion and galvanic isolation module with output terminals.

The structural diagram of the stationary part of the HSA is presented in figure 1, and the portable part in figure 2.

The stationary part (Fig. 1) of the SAC contains a controlled voltage converter 1, the measuring input of which is connected to the positive terminal of the controlled HIT GB, the output is connected to the input of the proportional amplifier 2, and the control input is connected to the first output of the first microcontroller 3, the output of the proportional amplifier 2 is connected to the third input of the first microcontroller 3, the second input of the first microcontroller 3 is connected to the output of the instrumental amplifier 4, the input of which is connected to the output of the first current transducer 5, the second the output of the first current transducer 5 is connected to the “common” HAC wire, and the first is connected to the first output of the second current transducer 6 and the negative terminal of the controlled HIT GB, the second output of the second current transducer 6 is connected to the load circuit, and the output through the instrumental amplifier 7 is to the input of the first microcontroller 3. The first microcontroller 3 is connected to a real-time clock with autonomous power supply 8, the output of which is connected to the first control input of the power control module 9, the input of which is connected to the plus terminal played by the HIT GB, the output is connected to the input of the power supply unit 10, and the second control input of the power control module 9 is connected to the second output of the first microcontroller 3. The first level conversion and galvanic isolation module 11 is connected on the one hand to the first microcontroller 3, and on the other, to the RX / TX output terminals of the stationary part of the HSA, and the control output of the first level conversion and galvanic isolation module is connected to the third control input of the first power control module 9 and the fourth input of the first micro controller 3. The first microcontroller 3 is connected to the first non-volatile memory 12 and the temperature sensor 13.

The portable part (figure 2) contains a keyboard 14 connected to the module for converting and stabilizing the supply voltage 15, the first input of which is connected to the terminals for connecting an external power source, the second with a built-in chemical current source 16, the third with the output of the second microcontroller 17, and the output is connected to the first input of the second microcontroller, and the control inputs / outputs of the second microcontroller are connected to the real-time clock 18 connected to the built-in chemical current source 16, and also connected to the W second non-volatile memory 19, display unit 20 and through the second conversion unit layers and galvanic isolation 21 - output terminals circuit RX / TX.

SAS works as follows. When the portable part is disconnected from the RX / TX terminals, the stationary part of the UHF is switched on by a signal from a real-time clock with autonomous power supply 8, which has an integrated chemical current source and is an electronic clock with a calendar and an alarm clock. The turn-on signal from the real-time clock with autonomous power supply 8 is supplied to the power control module 9, the latter is turned on and supplies voltage from the controlled HIT GB to the power supply unit 10. At the output of the power supply unit 10, voltages of the required polarity and level are formed for operation of the entire stationary part of the EAS. After passing the reset signal, the first microcontroller 3 (containing an analog multiplexer, analog-to-digital converter, timers, serial interface) sends a pick-up control signal to the input of power control module 9 and reprograms the alarm clock for 8 hours for the next turn-on. After reprogramming, a real-time clock with autonomous power supply 8 removes the control signal at the input of power control module 9, but the stationary part of the SAS remains on due to the presence of a pick-up signal. Then, the first microcontroller 3 converts the analog signals into a digital code on the channel:

- measuring the load current - the second current transducer 6, instrumental amplifier 7;

- measurements of the current of own consumption - the first current transducer 5, instrumental amplifier 4;

- voltage measurements of controlled HIT GB - controlled voltage converter 1, proportional amplifier 2.

Using a temperature sensor 13, the temperature is monitored by a controlled HIT GB.

After taking the measurements, the microcontroller calculates:

- the amount of electricity received in the load at an interval of time after the last inclusion;

- the amount of electricity received for own needs in the time interval after the last turn on;

- extracts from the non-volatile memory 12 (electrically reprogrammable) statistical data on the consumed amount of electricity, adds the results of the calculations, and returns the new values to the non-volatile memory 12.

Then, the first microcontroller 3 reads the time and date from the real-time clock with autonomous power supply 8 and writes the voltage value with the time and temperature marking to the first non-volatile memory 12. Then, the first microcontroller 3 removes the “pickup” signal, which enters the first power control module 9, and thereby de-energizes the stationary part, putting it into sleep mode.

When the portable part is connected to the RX / TX terminals, the first level conversion and galvanic isolation module 11 generates a signal to turn on the power control module 9. At the same time, the signal from the output of the first level conversion and galvanic isolation module 11 is fed to the input of microcontroller 3, in this case, at “start” ”The first microcontroller 3 generates its“ pick-up ”signal of the power management module 9, analyzes where it came from, executes the commands received via the RX / TX lines, and when the portable control is turned off and the control removes the signal "pickup" of the power management module 9, putting the stationary part in sleep mode.

The portable part of the ASH (figure 2) works as follows. The portable part of the HAC is turned on by pressing the “on / off” button on the keyboard field 14. The signal from the keyboard is fed to the first input of the conversion and stabilization module of the supply voltage 15 and enables the portable part of the HAC to be switched on from the built-in chemical current source 16 connected to the second input the module for converting and stabilizing the supply voltage 15. At the output of the module for converting and stabilizing the supply voltage 15, the voltages of the polarity level necessary for the portable part of the SAC are formed and a signal is generated at the first input of the second microcontroller 17. After switching on, the second microcontroller 17 analyzes the signal at this input, and if it is present, it generates a “pick-up” response signal, and when the “on / off” button is released, the conversion module is held on and stabilization of the supply voltage 15 by the “pickup” signal and the signal is taken at the first input of the second microcontroller 17. When the “on / off” button is pressed again on the keyboard field 14 at the output of the conversion and stabilization module and a supply voltage 15, a signal is generated at the first input of the second microcontroller 17, the second microcontroller 17 removes the “pickup” signal, and when the “on / off” button is released on the keyboard field 14, the portable part of the EAS is disabled.

When you turn on the external power source connected to the first input of the conversion and stabilization module of the supply voltage 15, the latter is turned on, but the signal to the first input of the second microcontroller 17 does not form. Thus, the second microcontroller 17 recognizes the power source and, in the case of power from an external source, provides adjustment of the illumination of the display module 20 associated with the second microcontroller 17. In the on state, the second microcontroller 17 through the associated second level conversion and galvanic isolation module 21 provides current flow through RX / TX circuits connected by a cable with the same circuits of the stationary part of the ACS. The stationary part of the SAC is taken out of the “sleep” mode and, using the operator’s commands, using the keyboard 14 provides the transfer of accumulated information from the first non-volatile memory 12. The received information is recorded in the second non-volatile memory 19 of the portable part of the SAC and can then be displayed on the display module 20 of the portable part connected and disconnected from the stationary part. The portable part of the SAC incorporates a real-time clock 18 connected to the second microcontroller 17 and connected to the built-in HIT 16.

Sources of information

1. Vailov A.M., Eigel F.P. Automation of control and maintenance of batteries. - M.: Communication, 1975.

2. Patent of Russia No. 2160904 C1, 12.20.2000. Amp-hour counter. Belyaev A.N., Voitkun V.V., Minkov A.P.

3. The application of the Russian Federation for the invention No. 9301880, 08.20.1995. Device for measuring the flow of electric energy, Schepin B.C.

Claims (1)

Ampere-hour meter with a portable control panel, consisting of a stationary part containing current and voltage converters, a proportional amplifier, and a portable part, characterized in that a second current converter, two instrumentation amplifiers, a first microcontroller, a real-time clock are additionally introduced into the stationary part self-powered, power management module, power supply, first level conversion and galvanic isolation module, the second current converter connecting the first output is connected to the negative terminal of the controlled chemical current source, and the second terminal to the load circuit, and the output of the second current converter is connected to the input of the instrument amplifier, the output of which is connected to the input of the first microcontroller, the first terminal of the second current converter is connected to the first terminal of the first current converter, second terminal which is connected to the common wire of the device, and the output through the second instrumentation amplifier to the second input of the first microcontroller, the third input of the first microcontroller is connected to the output of a proportional amplifier, the input of which is connected to the output of a controlled voltage converter, the first input of which is connected to the positive output of a controlled chemical current source, and the second to the first output of the first microcontroller, which is connected to a real-time clock with autonomous power supply, the output of which is connected to the first the control input of the power management module, the input of which is connected to the positive terminal of the controlled chemical current source, and the output is connected to the input of the power supply, in the second control input of the power control module is connected to the second output of the first microcontroller, the first level conversion and galvanic isolation module is connected on the one hand to the first microcontroller, and on the other hand, to the output terminals of the stationary part, and the control output of the first level conversion and galvanic isolation module is connected to the third control input of the power management module and the fourth input of the first microcontroller, and the first microcontroller is connected to the first non-volatile memory and yes temperature sensor, the portable part, made in the form of a portable control panel with the ability to disconnect / connect to the stationary part using the connecting cable, contains a keyboard connected to the conversion and stabilization module of the supply voltage, the first input of which is connected to the terminals for connecting an external power source, the second - with an integrated chemical current source, the third - with the output of the second microcontroller, and the output is connected to the first input of the second microcontroller, and by the control input / Outputs second microcontroller is coupled to a real time clock connected to the integrated chemical current source and connected to the second non-volatile memory module and display module via the second conversion levels and galvanic isolation - with the output terminals.

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