SU1673984A1 - Integral flow velocity measuring system - Google Patents

Abstract

This invention relates to a technique for measuring the velocity of fluids and can be used to measure the integral flow velocity in the ocean during oceanographic research. The aim of the invention is to increase the reliability of the measurement of the integral over the depth of the flow velocity in the oceans and seas. The integrated flow velocity measurement system is used on the floating device 1 and contains onboard information processing equipment, lowered on the carrying cable 2, a submersible container on which one of the three sonar transducers is installed. Two other sonar transducers are lowered from the bow and stern of the craft into the near-surface ocean layer. Three hydroacoustic transducers form three measuring branches, in which the emitters and receivers of acoustic signals operate in pairs and consecutively in three cycles. The system is controlled by a synchronization unit. The interface unit implements the instrument and interface functions between the system units and the computer. The integral flow rate measurement system allows reliable and rapid measurement of the flow rate in a sequential automatic mode synchronously with the measurement of the depth of the container of the system and the course of the craft. 3 il.

Description

This invention relates to a technique for measuring the velocity of fluids and can be used to measure the integral flow velocity in the ocean during oceanographic research.

The purpose of the invention is to increase the reliability of the measurement of the integral over the depth of the flow velocity in the oceans and seas.

FIG. 1 depicts a system for measuring the integral flow rate when operating with a craft; in fig. 2 - system block diagram; in fig. 3 is a diagram of the synchronization unit

The integrated flow velocity measurement system is used on the floating device 1 and contains onboard equipment and a submersible container 3 lowered on the carrying cable 2, on which the first sonar transducer A is installed. Similar second and third sonar transducers 5 and 6 are lowered on the cables from the bow and stern of the floating means in the near-surface layer of the ocean.

The connection circuit of the elements of the submersible container 3 contains the first pulse generator 7, the first receiver 8, the hydrostatic pressure measuring instrument 9, the transmitting register 10 and the modulator 11. The control inputs of the pulse generator 1 and the receiver 8 are combined and connected to the control conductor of the load-carrying cable 2.

The circuit of the onboard equipment elements (Fig. 2) includes the second and third pulse generators 12 and 13, the second and third receivers 14 and 15, the first and second measuring transducers 16 and 17, the demodulator 18, the receiving register 19, the measuring transducer 20, synchronization unit 21, interface unit 22 and calculator 23

The synchronization unit 21 constitutes the control code generation circuit 24, the system state register 25, the transmission valve circuit 26, the signal generation circuit 27, the responsiveness and the switch 28 of the inputs of the measurement converters 16 and 17. The first and second control inputs of the circuit 24 are the signal generation elements manual and automatic start and stop of the synchronization unit 21

The interface unit 22 implements instrument and interface functions between the system’s measuring equipment and the calculator. The instrument functions of the interface unit are implemented as follows.

The information input of the interface unit 22 is formed by an 8-bit bus common to the information outputs of the transducers 16 and 17,

the receiving register 19 of the hydrostatic pressure gauge code, the measuring course converter 20, the register in the synchronization unit 21, and the separator byte in

block 22 of the interface. The common bus is implemented using transmitting 8-bit valve circuits at the output of the measuring transducers. All common bus valve circuits are controlled by Read signals, similar to the same signal in the synchronization unit 21, which are formed in a predetermined order by the circuit switching circuit implemented using the associated between a multivibrator,

0 pulse counter and multiplexer.

The system for measuring the integral flow velocity works as follows.

Sonar transducers

5 (stern, fore and immersed) form three measuring branches, in which the emitters and receivers of acoustic signals work in pairs and successively in three cycles: radiation and reception of counter signals

0 signals. Nose of floating equipment - container (), Feed of floating equipment - container (6-4) and Nose-feed of floating equipment (5-6). The receiver-receiver pairs are controlled at successive times by a code whose values are generated by the synchronization unit 21.

At the end of the measuring cycle in each branch, the control code together with

0, the measurement information is input through interface unit 22 to calculator 23, after which it is reset and replaced with a new value.

The system is started up by the control signal at the time point to when performing a manual start operation. In this case, a control code is recorded in the status register of the synchronization unit 21. activating pair emitter-receiver

0 measuring branch 5-4. On the leading edges of the receiver signals, the measuring transducers complete the conversion of the parameters G45 and g 54 (the propagation times of the opposite acoustic signals).

5 signals). Simultaneously, a cycle and transmission along the cable of the hydrostatic pressure meter code is organized along the leading edge of the container receiver signal. Upon the expiration of any two of the three possible signals from the receivers in the synchronization unit 21, a readiness signal is generated, which informs the interface unit 22 of the completion of the conversion of all parameters in the measurement cycle. Subsequent actions of the interface unit ensure the establishment of informational communication with the calculator, polling and resetting the status register, polling the measuring transducers in a predetermined sequence, as well as generating a separation code, according to which the primary processing program determines the end of an information frame including a set of parameters in one measuring cycle . Information is entered into the calculator directly during the process of polling and converting the polled codes into the format of the word used in this calculator.

Upon completion of the last byte entry, the system is transferred to the second measurement cycle by loading the control code from the encoder into the status register. The control code is also used for switching the inputs of the measuring transducers 16 and 17, whereby the parameters to be measured rij in each measuring cycle are rigidly fixed to their measuring converter.

In the second measurement cycle, the control code activates a pair of transceivers of the measuring branch 6-4. Acting elements of the scheme are the same. as in the first cycle, except that the switching circuit of the inputs of the measuring transducers 16 and 17 provides measurement of the parameter by the transducer 16 and the parameter tm by the transducer 17. At the end of the second measuring cycle, the system is transferred to the third measuring cycle by loading the control code state register, activating the third measuring branch 5-6. In this cycle, the action of the circuit elements is similar to that described for the first deuh cycles, except that the transducers 16 and 17 respectively convert the parameters res g 56, and the hydrostatic pressure is not measured. The measurement cycles are repeated until the system is manually or automatically shut down.

The integrated flow rate measurement system allows reliable and fast measurement of the flow rate in a sequential automatic mode.

Claims (1)

synchronously with the measurement of the depth of the immersed container of the system and the course of the float of which means, and which information is collected and processed. 5 Formula of Invention The integrated flow velocity measurement system containing the first transducer, the synchronization unit, the display unit, floating means connected via a carrying cable with a submerged container in which the first sonar transducer connected to the first pulse generator and the receiver is installed, the meter 5 hydrostatic pressure, a second hydroacoustic transducer connected to a second pulse generator and a receiver connected to a first signal transducer connected to 0 by a synchronization unit, characterized in that, in order to increase the reliability of measuring the flow rate, a third sonar transducer connected to the third pulse generator and receiver, a second signal converter, demodulator, receiving register, interface unit are additionally inserted into it. , heading converter, module 0 tor and the transmitting register, the first input of which is connected to the output of the hydrostatic pressure meter, the second input is connected to the output of the first receiver and the second input of the modulator, the first input of which is connected to the output of the transmitting register, and the output of the modulator is connected via a load-carrying cable to the demodulator the first output of which is connected to the receiving register, and the second output to the first 0 information input of the synchronization unit, the second and third information inputs of which are connected respectively to the outputs of the second and third receivers, which are connected by control inputs 5 to the corresponding outputs of the synchronization unit, which is connected to the interface unit via the first bus I / O, and the interface unit via the second third, fourth, fifth and sixth tires 0 The input-output is connected to the heading sensor, the receiving register, the first and second signal converters, and the display unit, respectively, while the second and third hydro5 acoustic transducers are placed on the bow and stern of the floating device, respectively. w-1 i And s f yl -