SU873130A1 - Liquid flow speed meter - Google Patents

Description

(54) FLOW SPEED METER

   . ;

The invention relates to instrumentation and MoikeT to be used i to measure the flow velocity in open channels under conditions of a hundred (ionic gauging stations.

A device for measuring the flow rate of a fluid is known, which uses a constant puet velocity (Lens recorded by the photo-equipment

The disadvantage of such a device is the long time required to determine the speed value.

Lime meter measuring speed, containing an electro-device ady float, a magnet of vfarKoro magnet material, float holding electromagnet, electromagnet installation unit with float to a point, start, horizontal component of float path, sensor installation unit: for setting the sensor on the ground. flow, time measurement unit and blocker unit, the first output of which is connected to the zeroed head, the second - to the start-ups, the input of the time measurement unit and to the de-energizing input of the electromagnet: the third - to the input of the unit Application

electromagnet, and. with the input of the sensor installation unit 2.

The disadvantage of this meter is the low accuracy of measurements of the average flow rate on the vertical at long velocities.

The purpose of the invention is to improve the measurement accuracy.

Levnat Enna: "The goal is achieved by

Sh that .in the meter entered the converter of discrete values of the horizontal component of the gazvyvny path of the float to the Gre code, the converter of the Gre code to the position binary {Shy code, pentcTp

ts memory, the element OR, the element NOT and the computing device, while the sensor of the horizontal component of the path correction with the output outputs is connected to the BXOAatOf converter disk.

The 20 retry values of the horizontal component of the navigation path to the Gre code, whose discharge outputs are connected to the corresponding inputs of the converter. code in positional

25 binary, the outputs of the bits of which are connected to the information inputs of the memory register, the outputs of the bits of which are connected in parallel with the inputs of the OR element and with the first

The bit bits are the inputs of the computing device, the second bit inputs of which are connected to the corresponding outputs of the time measurement unit, and the output of the OR element is NOT connected to the input. Recording, memory register resolution and directly to the input of the Time measurement unit and with the input Resolution of the computational device computing, the zeroing input of which, together with the zeroing input of the memory register, is connected to the first output of the control unit. The sensor of the horizontal component of the float path is made in the form of electrically eluted from each other strips of electrically conductive material, installed horizontally but quantized at each step, perpendicular to the direction of flow above the water surface at a distance that both float touching them. The drawing shows a block diagram of a flow velocity meter. The flow velocity meter contains an electrically conductive float 1 made of magnetically soft material, a holding electromagnet 2, an electromagnet installation unit 3 with a float at the starting point, a horizontal sensor 4 of the float path, a sensor installation unit 5 at a given distance from the surface of the water, measurement unit b, time, control unit 7, converter 8, discrete values of the horizontal component of the float path to the code GRE, converter code gre, position binary code 9, memory register 10, element LEE 11, NOT element 12, 13. The meter unit vychislitelnoe flow rate operates as follows. By a command coming from the output of the control unit 7 to the input of the unit 3 of the installation of the electromagnet 2 with the float at the starting point, the float 1 is immersed at the bottom of the channel at the starting point. At the same time, from the control unit 7, a command is received to the unit 5 to install the sensor 4 horizontal, which is to set the float path at a predetermined distance from the water surface. The signals from the outputs of blocks 3 and 5, acting on the inputs of the control unit 7, carry information about the execution of these commands. The next one: the command coming from the control unit 7 to the inputs of the time measurement unit 6, the memory register 10, and the computing device 13, these units are being reset. After that, the de-energizing input of the electromagnet 2 holding the float from the output of the control unit 7 is given a command to start the float and at the same time the same output to the starting input of the time measuring unit b is received to ensure the start of the time reference of the movement of the float to the water surface. When it reaches the surface of the water, the float touches one or two adjacent electrically conductive strips of the sensor 4 of the horizontal component of the float path. Each bar is connected to one converter input with 3 discrete values of the horizontal component of the path along the cupola to the Gre code, which has a common grounded point. Therefore, the float at the time of emergence from the water short-circuits one or two adjacent inputs of the converter 8 with a closed circuit: the bar - float - water. Since the adjacent values of the Gre code differ only in one bit, when the float closes the two strips, it will be read to the Gre code value, which contains a greater number of symbols of one digit, which prevents reading ambiguity. This number is then converted into a positional binary code and fed to the information inputs of the memory register 10, the recording resolution of which receives an enable signal from the output of the NOT element 12, the input to which the signal comes from the OR 11 element. After writing the number to the memory register 10 at the output of the element OR 11 a signal unit appears, as a result of which the output of the element NOT 12 disappears the recording resolution signal and further touching the float to the other strips does not change the measurement result of this cycle. The first inputs of the computing device 13 from the output of the memory register 10 receive a number corresponding to the value of the horizontal component of the float path, and its second inputs with the output of the time measurement block b receive a number corresponding to the measured time value of the float movement. From the output of the element OR 11, the signal enters the Stop input of the time measurement unit and stops counting time. The same signal is fed to the input Resolution of the computation of the computing device 13, which calculates the average flow rate at the measuring vertical. This result is stored in the computing device until the next measurement cycle. The proposed device, in addition to improving the accuracy of measuring the flow rate, permits a steady flow measurement of the obtained value of the velocity and the measured water level. claims 1. A liquid flow velocity meter comprising a float made of electrically conductive magnet material, an electromagnet of float holding, an electromagnet installation unit with a float at the starting point, a sensor for the horizontal component of the float path, a sensor installation unit for a predetermined distance from the flow surface, the time measurement unit and the control unit, the first output of which is connected to the embedding entrance, in the second output - to the starting input of the time measuring unit and to the electric shut-off input the third output - with the input of the electromagnet installation unit with a float and with the input of the sensor installation unit, from -, l and h and with, in order to improve the measurement accuracy, serially connected discrete values of the horizontal component were introduced into it float paths to the Gre code connected to the output of the path sensor, Gre code converter to the positional binary code, and the memory register, as well as the computing device, the OR element and the logical element, NOT, while the information inputs calculate Yelnia devices are connected to the outputs of the register and the memory unit measurement time, reset to zero -. the skinny inputs of the computing device and the memory register are connected to the first output of the control unit, the inputs of the OR gate are connected to the register outputs, and. the output is with the Stop input of the time measurement block, the Resolution of the computing device computing input, and through the logical element NO with the input of the recording register of the memory register. 2. The meter as set forth in claim 1, which is based on the fact that the sensor of the horizontal component of the float path is made in the form of electrically isolated from each other strips of electrically conductive material installed horizontally above the surface of the flow, perpendicular to its direction, at a distance of from the surface, providing a touch of their float during its ascent. Sources of information taken into account in the examination 1. The author's certificate of the USSR 491897, cl. G 01 R 5/20, 1974. 2.Orlova V.V. Hydrometers Hydrometiedate. L., 1974, p. 105-106 (prototype).

Claims (2)

Claim 1. A liquid flow velocity meter containing a float made of electrically conductive soft magnetic material, a float holding electromagnet, an electromagnet installation unit with a float at the start point, a horizontal component of the float path, a sensor installation unit at a predetermined distance from the flow surface, a time measuring unit and a control unit, the first output of which is connected to a nulling input, the second output - with the start input of a time measuring unit and with an electromagnet shutdown input, the third output d - with the input of the installation unit, an electromagnet with a float and with the input of the sensor installation unit, with the exception that, in order to improve the measurement accuracy, a series-connected converter of discrete values of the horizontal component of the float path is introduced into it to the Gray code connected to the output of the path sensor, the Gray code converter to the positional binary code, and the memory register, as well as the computing device, the OR logical element and the NOT logical element, while the information inputs of the computing device with connected to the outputs of the memory register of the th block of time measurement, reset-. the lean inputs of the computing device and the memory register are connected to the first output of the control unit, the inputs of the OR logic element are connected to the outputs of the register, and the output is connected to the Stop input of the time measuring unit, the input of the Calculation of the computing device, and through the logic element is NOT connected to the input. Register write permission memory. 2. The meter in π. 1, wherein the sensor of the horizontal component of the path of the float is made in the form of electrically conductive strips * 5 made of electrically conductive material mounted horizontally above the surface of the flow, perpendicular to its direction, at a distance from the surface that makes them touch 20 float when it emerges.