RU13257U1 - ACCOUNT DEVICE FOR MATERIAL EXPENDITURE DEVICES - Google Patents

Abstract

1. A counting device for flow meters, including a turbine type flow sensor, an amplifier, a flow calculation unit, an indicator and a power supply, characterized in that a test unit is inserted into it, the input of which is connected to the output of the flow calculation unit, and the output to the input indicator, and the power supply is made with high internal resistance. 2. A counting device for metering devices according to claim 1, characterized in that the test unit includes a working memory unit and a test memory unit, a test generator whose output is connected to the input of the test memory unit, the output of which is connected to the first input of the comparison circuit, the second input which is connected to the output of the test generator, the recording permission block, the first output of which is connected to the control input of the working memory unit, the output of which is connected to the output of the test unit, the information input of the working memory unit dklyuchen entry to the test node, the input control unit connected to the write enable output of the comparator circuit, the test oscillator input is combined with the input key and the control is connected to the second output of the write enable block key output is connected to the load resistor, and the input power to the input uzla.3. A counting device for flow meters according to claim 1, characterized in that the flow calculation unit is made in the form of a divider counter.

Description

ACCOUNT DEVICE FOR ACCOUNTING METHODS

SUBSTANCES

The proposed device relates to electronic counting devices for metering devices, is intended for use, for example, in meters for the consumption of water or gas and can be used in various sectors of the economy when measuring and accounting for consumption.

Known electronic device for displaying the flow rate of a substance in a flow meter (See the description of US patent No. 4489616 from 25.12 84. Fig. 6), containing a turbine type flow sensor, amplifier, flow calculation unit and indicator.

The known device is simple and allows you to display on the indicator screen the value of the total flow rate of a substance passing through a turbine type flow meter.

However, the known device has significant drawbacks, in particular, it does not provide storage of already calculated information while reducing the supply voltage to a level that does not ensure reliable operation of the elements of digital circuits.

The objective of the utility model is to increase the reliability of the counting device.

The technical result is to reduce the dependence of the distortion of information on the consumption of a substance on the state of discharge of the battery used as a power source.

a turbine-type flowmeter, an amplifier, a flow calculation unit, an indicator, and a power supply unit, a test unit is introduced, the input of which is connected to the output of the flow-rate-calculating unit, and the output to the indicator input, and the power supply unit is made with high internal resistance.

Besides,

The test node contains a working memory block and a test memory block, the test generator whose output is connected to the input of the tested memory block, the output of which is connected to the first input of the comparison circuit, the second input of which is connected to the output of the test generator, the recording permission block, the first output of which is connected to the control block input of the working memory, the output of which is connected to the output of the test node, the information input of the block of working memory is connected to the input of the test node, the control input of the recording permission block is connected n to the output of the comparison circuit, the input of the test generator is combined with the key control input and connected to the second output of the write permission block, the key output is connected to the load resistor, and the input to the node power input;

- flow calculation unit is made in the form of a divider counter.

The utility model is illustrated by means of the drawings, where in FIG. 1 shows a structural diagram of a counting device for metering devices; in Fig.2 is a structural diagram of a test unit; in Fig. 3, an embodiment of a recording permission block.

The metering device for metering devices includes a series-connected turbine type 1 flow sensor, amplifier 2, flow calculation unit 3, test unit 4, indicator 5, and a power supply unit 6. 1

to the input of block 8 of the tested memory, the output of which is connected to the first input of the comparison circuit 10, the second input of which is connected to the output of the test generator 9, the block 11 recording permission, the first output of which is connected to the control input of the block 7 of the working memory, the output of which is connected to the output of the test node 4, the information input of the working memory block 7 is connected to the input of the test node 4, the control input of the write permission block 11 is connected to the output of the comparison circuit 10, the input of the test generator 9 is combined with the control input of the key 12 and connect yong second write enable output unit, an output switch connected to the load resistor 13, and the input power to the input node.

The recording permission block includes a pulse generator 14, the output of which is connected to the zeroing input of the trigger 15, the input of the delay element 16 and is the second output of the recording permission block, the output of the delay element 16 and the inverse output of the trigger 15 are connected, respectively, to the first and second inputs of the element 17 AND , the output of which is the first output of the recording permission block, the trigger synchronization input is connected to the control input of the recording permission block.

The proposed metering device for metering devices; weighing works as follows. The pulse signals from the output of the turbine type flow sensors 1 are fed through an amplifier 2 to the input of the flow calculation unit 3, at the output of which a digital signal is generated corresponding to the produced flow rate; The signal from the output of block 3 is fed to the input of the working memory block 7 (Fig. 2) of the testing unit, the recording permission block 11 generates a short pulse at its second output to start the test generator 9, and briefly connect the test load to the power source via key 12. After start test generator test signals with

its output goes to the input of the tested memory block, the read signal from the output of which goes to the input of the comparison circuit to the other input of which the test signal is supplied. In case of equality of the compared signals, a logical signal is generated at the output of the comparison circuit, based on which a signal is generated at the first output of the write permission block 11, which allows information to be recorded in the working memory block 7. At the same time, the trigger tipping signal 15 and the signal from the output of the generator 14 through the delay element 16 and the element 17 And are received at the control input of the working memory unit 7 at the synchronization input of the trigger 15 (Fig. 3).

When the battery used as a power source is discharged due to the presence of high internal resistance, this property is typical, for example, for a lithium battery; the voltage drop per unit load current increases. When recording, there is a slight increase in the current consumption, which can reduce the supply voltage to a level that does not provide reliable operation of the elements of digital tools, which leads to an increase in the likelihood of incorrect recording of information in memory. In this case, a signal that does not correspond to the test will be generated at the output of the memory block 8 being tested, and a signal will be generated at the output of the comparison circuit 10 that prohibits the recording block 11 from generating a signal to be written to the working memory block 7. Thus, the recording, which is accompanied by an increased probability of distortion information in the conditions of a decrease in the supply voltage and may lead to the loss of previously calculated flow rates.

The proposed metering device for metering devices for the consumption of substances provides an increase in the reliability of the metering device by reducing the dependence of the distortion of information on the consumption of the substance on the state of the battery.

Claims (3)

1. A counting device for flow meters, including a turbine type flow sensor, an amplifier, a flow calculation unit, an indicator and a power supply, characterized in that a test unit is inserted into it, the input of which is connected to the output of the flow calculation unit, and the output to the input indicator, and the power supply is made with high internal resistance.  2. A counting device for metering devices according to claim 1, characterized in that the test unit includes a working memory unit and a test memory unit, a test generator whose output is connected to the input of the test memory unit, the output of which is connected to the first input of the comparison circuit, the second input of which is connected to the output of the test generator, a recording permission unit, the first output of which is connected to the control input of the working memory unit, the output of which is connected to the output of the test unit, the information input of the working memory unit connected to the input of the test node, the control input of the write permission block is connected to the output of the comparison circuit, the input of the test generator is combined with the key control input and connected to the second output of the write permission block, the key output is connected to the load resistor, and the input to the power supply input of the node. 3. A counting device for metering devices for the consumption of a substance according to claim 1, characterized in that the flow calculation unit is made in the form of a divider counter.