RU2055316C1 - Self-contained device for routine estimation of average characteristics of swell - Google Patents

Abstract

FIELD: estimation of average characteristics of sea swell at routine hydrological support for conducting sea work on shelf. SUBSTANCE: device has metering unit 1, unit 2 for determination of direction of motion of instrument transducer, wave counter 3, unit 4 for determination of average wave height, count beginning delay unit 5, massive selection setting unit 6, digital annunciators 7 and 8, stabilizer with storage battery 9 and chattering elimination unit 10. 1-2-10-4-7, 9-5-6-8, 5-4, 5-3, 9-3. EFFECT: enhanced reliability. 3 cl, 1 dwg

Description

 The invention relates to oceanography and can be used in testing ships, platforms and other engineering structures to determine the average characteristics of wind waves.

 Determining the characteristics of sea waves is an important task in many research, development and delivery works. In domestic and foreign practice, stationary and autonomous devices of various types are widely used to obtain information about the excitement.

The main requirements are
Efficiency of obtaining information in physical quantities and the absence of the need for its additional processing;
the ability to obtain information about the height of the wave with any degree of security;
high accuracy in determining the characteristics of real waves;
operational reliability, ease of maintenance;
small overall dimensions;
autonomy.

Known autonomous wave meter containing a software distribution unit connected to the first output of the sensor, and the second to the first input of the time-code converter, and its second input is connected to the third output of the software distribution unit, as well as counters of fluctuations in sea level, number of waves , wave heights and time, the outputs of which through the switch are connected to the radio transmitter, the fourth and fifth outputs of the software distribution unit are connected respectively through the switch to the radio transmitter and to the first inputs time, wave height, number of waves and sea level fluctuations [1]
The disadvantage of this wavemeter is the low accuracy of measuring the parameters of the excited surface of the sea.

Closest to the proposed device is an autonomous wave meter containing additionally entered the average sea level register, two pulse generators and an adder with a single transfer to the least significant digit, the first, second, third and fourth inputs of which are respectively connected to the second output of the time-code converter, with the output of the unit for determining the zero sea level, with the output of the average sea level register and the sixth output of the software distribution unit, and the first, second and third outputs with the second input of the count fucking the sea level, the counter of the number of waves and the counter of the height of the waves, the seventh and ninth outputs of the distribution block are connected respectively through the first pulse generator with the first input of the average sea level register, with the second input of the average sea level register and through the second pulse generator with the third input of the block determining zero sea level, the third input of the average sea level register is connected to the first output of the time-code converter [2]
The disadvantage of this autonomous wavemeter are
the need for reference to the level of the water surface, i.e. the presence of an additional controlled parameter;
the possibility of drift of the electrical characteristics of circuit elements, leading to additional measurement errors; the presence in a single device of a large number of different blocks by the principle of construction;
the transmission of information by radio channel introduces additional errors in the measurement results, limits the possibility of using the device both in distance to the object of receiving information, and in the operating conditions of the device and the object of receiving information under external conditions (state of the atmosphere, sea surface, the presence of electromagnetic radiation sources in the water area tests and the object receiving information);
high energy consumption, which limits the possibility of offline operation; the complexity of the diagnosis and repair of device blocks, requiring stationary conditions and special equipment;
lack of operational information processing.

 The proposed device provides a simplification and lightweight design, reduced hardware costs, increased operational reliability, even in adverse external operating conditions. In addition, due to the fact that the output information does not require additional processing, it can be obtained by specialists of low qualification.

 This is achieved by the fact that in a stand-alone device for the rapid assessment of average wave characteristics, containing a measuring unit, a unit for determining the average wave height, a wave number counter and a unit for specifying a time period for sampling an array of a given number of waves, while the measuring unit has a wave height sensor in the form of a turntable and a converter for rotating the pinwheel into a pulse-code signal, a unit for determining the direction of movement of the pinwheel and a power supply unit connected in series with each other, a power button VA and a delay unit for the start of counting, with the input of the unit determining the direction of movement of the turntable connected to the output of the measuring unit, the first output connected to the first input of the counter for the number of waves, and the second output to the first input of the unit for determining the average wave height, the output of the counter for the number of waves connected to the first input unit for setting the sampling time period for an array of a given number of waves and with a second input of the average wave height determination unit, while the output of the counting start delay unit is connected to the third input of the Wed determination unit days wave height, the output of which is connected to the input of the first digital indicator, the second input of the counter number of waves and a second input of the reference sampling time period a predetermined number of waves of the array, the output of which is connected to the input of the second digital indicator.

 In addition, in addition, between the outputs of the functional block for determining the direction of motion and the first inputs of the counter-decoder of the wave height and the counter of the number of waves, a functional block for eliminating the "bounce" of the contacts of electromagnetic relays can be included.

 The presence in the proposed device of the measuring unit, made in the form of a turntable transducer of the wave height into a pulse-code signal and connected to the functional unit to determine the direction of movement of the measuring transducer, as well as the selected order of connection of all the units included in the circuit, simplify, facilitate and cheapen the design, increase operational reliability.

 The drawing shows a structural diagram of the proposed device.

 The stand-alone device for the operative assessment of average wave characteristics contains a measuring unit 1 connected to a measuring transducer determining unit 2, a unit 2 is connected to a wave number counter 3 and an average wave height determining unit 4 through a chatter elimination unit 10, the counting start delay unit 5 is connected with a counter 3 of the number of waves, block 4 determine the average height of the wave, block 6 sets the time period for sampling an array of a given number of waves. Unit 4 for determining the average wave height and unit 6 for specifying an array of samples are connected to digital displays 7 and 8. The device is powered by a battery and stabilizer 9.

 Autonomous device for the rapid assessment of the average characteristics of the waves is as follows.

 When the power is turned on, the counting start delay unit provides a delay in starting the work of the stand-alone device by 2.5-3 minutes. This time was chosen so that the autonomous device launched into the water could move away from the side of the vessel and not fall into the area of the waves distorted by it. Block 5 delay start counting is a time relay, the response signal of which allows the block 6 to set the sampling time, counter 3, the number of waves and block 4 determine the average wave height, setting them to zero. The pulses formed by the measuring unit 1 as a result of the operation of the reed switches enter the block 2 determining the direction of movement of the measuring transducer. In block 2 determining the direction of the alternating distribution of pulses occurs on two channels that determine the direction of movement of the Converter. Changing the direction or changing the channels is fixed in block 2 by the formation of pulses and feeding them through block 10 to eliminate bounce on the counter 3 of the number of waves. The total number of pulses from two channels comes from block 2 to block 4 determining the average wave height.

 The counter 3 of the number of waves captures the number of waves that are necessary for analysis, in our case 80, i.e. 160 changes in directions. After the counter is completely filled at the output of the block, a counting signal appears, which goes to block 4 and block 6. The number of pulses of block 4 and seconds of block 6 is displayed by a three-digit number on the digital displays 7 and 8. The digital display of the wave height determination unit 4 shows their average value , and a digital board of the block 6 times, the measurement time of 80 waves. After reading the information from the digital scoreboards 7 and 8, the processing is reduced to calculating the wave heights of any security, taking into account the corresponding coefficient.

 Comparative tests with other wave-measuring devices showed its undeniable operational advantages.

 The device is recommended for use on ships of the Navy.

 Specifications.

 Recorded wave heights: h> 0.11 m.

The limiting relative error in determining the average wave height (no more); h 0.5 m 4% h 1.0 m 2% h>> 2.0 m 1%
Maximum relative error in determining the average wave period (not more): 1%
The weight of the kit is 12 kg.

 Application area.

The device is indispensable for
conducting hydrological studies;
testing of ships and other vehicles in open water;
emergency rescue operations;
towing ships, boats, trawls and other goods;
conducting sports competitions;
hiking trips on boats and yachts;
ensuring safety at oil towers, offshore platforms and hydraulic structures for various purposes.

 The device can be included in the set of navigation equipment as an additional tool for obtaining operational information about the conditions of navigation.

Claims (3)

 1. AUTONOMOUS DEVICE FOR THE OPERATIONAL EVALUATION OF AVERAGE WAVE CHARACTERISTICS, comprising a measuring unit, an average wave height determination unit, a wave number counter and a unit for specifying an array sampling time period of a predetermined number of waves, characterized in that the measuring unit has a wave height sensor in the form of a turntable and a transducer the movement of the pinwheel into a pulse code signal, a unit for determining the direction of movement of the pinwheel and a power supply unit connected in series with each other, a power button of the device and a block holding the start of the counting, the input of the unit determining the direction of movement of the turntable connected to the output of the measuring unit, the first output connected to the first input of the counter for the number of waves, and the second output to the first input of the unit for determining the average wave height, the output of the counter of the number of waves connected to the first input of the task unit the time period of sampling an array of a given number of waves and the second input of the average wave height determination unit, while the output of the count start delay unit is connected to the third input of the average height determination unit waves, the output of which is connected to the input of the first digital indicator, the second input of the counter of the number of waves and the second input of the unit for setting the sampling time period of the array of the specified number of waves, the output of which is connected to the input of the second digital indicator.  2. The device according to claim 1, characterized in that the converter of the pinwheel into a pulse-code signal includes electromagnetic relays, and between the outputs of the unit for determining the direction of movement of the pinwheel and the first inputs of the unit for determining the average wave height and the counter of the number of waves, a chatter elimination unit is included electromagnetic relay contacts. 3. The device according to p. 1, characterized in that the installation angle of the vanes of the turntable of the measuring unit is 35 ^o .