Automatic sound path distance adjusting device and air sound path distance metering device of sound wave detector

Abstract

The utility model discloses a sound path distance automatic adjusting device and a sound wave detector air sound path distance metering device, which comprise a main control unit and a power supply unit, the input end of the main control unit is connected with an upper computer through a communication unit, and the output end of the main control unit is respectively connected with a motor driving circuit, an encoder and a proximity switch; the motor driving circuit drives the stepping motor to work and drives the transmission structure of the transducer to conduct transducer transmission, the encoder collects the transmission distance of the transmission structure, and the proximity switch enables the main control unit to collect the distance between the transmitting transducer and the receiving transducer when being turned on. According to the utility model, through the mutual cooperation of the high-precision stepping motor, the encoder and the proximity switch, the detection precision is ensured, and the sound wave remote detection efficiency is greatly improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of acoustic wave detection, and particularly relates to an acoustic path automatic adjustment device and an air acoustic path measurement device of an acoustic wave detector. BACKGROUND

[0002] According to JJG 990-2004 "acoustic wave detector verification regulation", the acoustic wave detector is verified and calibrated, the acoustic time is measured by the acoustic signal method, a verification device schematic diagram is shown in Figure 9 The detection method requires that the transmitting probe and the receiving probe are measured once every 60mm, and the acoustic time is measured 5 times, and the temperature change is not more than ±0.5℃ during the measurement process.

[0003] The existing detection method is not ideal in detection accuracy and detection efficiency when adjusting the acoustic path. SUMMARY

[0004] In order to solve the problems of poor detection accuracy and detection efficiency in the existing acoustic path measurement, the utility model provides an acoustic path automatic adjustment device and an air acoustic path measurement device of an acoustic wave detector, which is characterized by the mutual cooperation of high-precision stepping motor, encoder and proximity switch, which can greatly improve the remote detection efficiency of acoustic wave while ensuring the detection accuracy.

[0005] According to one aspect of the utility model, an acoustic path automatic adjustment device is provided, which comprises a main control unit and a power supply unit, the input end of the main control unit is connected to the host computer via a communication unit, and the output end is connected to the motor drive circuit, the encoder and the proximity switch; the motor drive circuit drives the stepping motor to work and drives the transmission structure of the transducer to transmit the transducer, the encoder collects the transmission distance of the transmission structure, and the proximity switch makes the main control unit collect the distance between the transceiving transducers when it is turned on.

[0006] Optionally, the motor drive circuit is connected to the stepping motor, the proximity switch is connected to the proximity switch control optocoupler, and the stepping motor, proximity switch and encoder are connected to the transmission structure of the transducer.

[0007] Optionally, the transmission structure comprises a ball screw.

[0008] Optionally, the communication unit comprises a router, an RJ45 winch mainboard connector, a power cat module and a network chip connected in sequence, and the network chip is connected to the main control unit.

[0009] Optionally, the main control unit is connected to the encoder connector and the control optocoupler of the proximity switch via a serial port.

[0010] Optionally, the power supply unit comprises a 24V stepping motor power supply circuit and a 15V to 12V / 3.3V DC-DC circuit.

[0011] Optionally, the encoder adopts a large hollow hollow shaft encoder ZKT8030.

[0012] Optionally, the master control unit adopts an STM32F407ZG series chip.

[0013] Optionally, the sound path automatic adjustment device is provided with a protective cover.

[0014] According to an aspect of the utility model, a sound path automatic adjustment device is configured with the sound path automatic adjustment device, wherein the encoder, motor drive circuit and proximity switch are arranged on the moving platform, the transmission structure is connected with the clamp, and the clamp is used for fixing the transducer.

[0015] Compared with the prior art, the utility model has the beneficial effects that:

[0016] The utility model provides a kind of sound path automatic adjustment device, cooperate the transceiving transducer of sound wave remote measurement device to be able to remotely adjust test interval, guarantee the interval accuracy of transceiving transducer.The sound path adjustment range of this sound path automatic adjustment device is not less than 500mm, sound path adjustment step can be adjusted, maximum step 60mm, positioning accuracy is better than ±20 μm, repeat positioning accuracy is better than ±20 μm, while ensuring detection accuracy, greatly improve sound wave remote detection efficiency. BRIEF DESCRIPTION OF DRAWINGS

[0017] To more clearly illustrate the technical scheme in the embodiments of the utility model or prior art, below will be to the drawings used in embodiment or prior art description do a simple introduction, obviously, the drawings in the following description is some embodiments of the utility model, for those skilled in the art, without creative labor, according to these drawings, obtain other drawings.

[0018] Figure 1 The hardware connection schematic diagram of the sound path automatic adjustment device provided by the embodiments of the utility model is provided.

[0019] Figure 2 The hardware connection schematic diagram of the sound wave detector air sound path measurement device provided by the embodiments of the utility model is provided.

[0020] Figure 3 The system power supply schematic diagram provided by the embodiments of the utility model is provided.

[0021] Figure 4 The +12V power supply circuit schematic diagram provided by the embodiments of the utility model is provided.

[0022] Figure 5A schematic diagram of a +3.3V power supply circuit provided for an embodiment of this utility model.

[0023] Figure 6 A schematic diagram of a +4.4V power supply circuit provided for an embodiment of this utility model.

[0024] Figure 7 A schematic diagram of a motor drive circuit provided for an embodiment of this utility model.

[0025] Figure 8 A schematic diagram of the proximity switch optocoupler control circuit provided in an embodiment of this utility model.

[0026] Figure 9 This is a schematic diagram of an existing calibration device. Detailed Implementation

[0027] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model. In addition, the technical features of the various embodiments or individual embodiments provided by this utility model can be arbitrarily combined to form new technical solutions. Such combinations are not bound by the order of steps and / or structural composition patterns, but must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0028] To enable remote adjustment of the test spacing between the transceiver transducers of the acoustic remote metering device and ensure the spacing accuracy of the transceiver transducers, this utility model embodiment provides an automatic acoustic path adjustment device with an acoustic path adjustment range of not less than 500mm, adjustable acoustic path adjustment steps with a maximum step of 60mm, positioning accuracy better than ±20μm, and repeatability positioning accuracy better than ±20μm. This device significantly improves the efficiency of remote acoustic detection while ensuring detection accuracy.

[0029] Since the motor load is not large, the automatic sound path adjustment device directly adopts the hardware architecture of the drilling TV electric winch as the main hardware. In addition, a ball screw with high repeatability is selected as the main transmission, and a high-precision encoder with 5000 pulses / revolution is selected to meet the accuracy requirements of the project. At the same time, the host computer software can display the distance between the two transducers in real time and can reset the distance between the transducers to zero.

[0030] The sound path automatic adjustment device provided by the embodiment of the utility model, adopt the hardware architecture of the drilling television electric winch as the hardware main body, including main control unit and power unit, the input of main control unit is connected host computer via communication unit, and the output is connected motor drive circuit, encoder and proximity switch respectively;The motor drive circuit drives the stepping motor to work, drives the transmission structure of transducer to transmit, the encoder collects the transmission distance of transmission structure, and the proximity switch makes the main control unit collect the distance between the transceiver when it is on.

[0031] Please refer to Figure 1 The control panel of the sound path automatic adjustment device provided by the embodiment of the utility model selects 32 ARM processors STM32F407ZGT6 as the main control unit, and combines with the Ethernet to serial port chip CH9121 to realize wireless communication with the host computer through the network port. After the host computer and the lower computer interact, the motion instruction is sent to control the moving platform to move forward and backward in real time through the high-power stepping motor drive chip TMC5160, the encoder count is read and the proximity switch state is read, and finally the sound path device automatic control is realized.

[0032] Specifically, the host computer is connected to the router communication module of the sound path automatic adjustment device in a wireless mode, and the router is connected with the main control unit via the RJ45 winch mainboard connector, the power cat module and the CH9121 network chip. The specific implementation mode is as follows: the host computer sends an instruction to the main control unit of the sound path automatic adjustment device through the router, the main control unit controls the stepping motor to move according to the instruction, the ball screw with high positioning accuracy is used as the transmission main body to transmit the transducer, the high-precision encoder with 5000 pulses / turn is selected to test the error accuracy, the proximity switch is used to set the transducer backstroke zero point, and the real-time moving distance of the motor is read in real time while controlling the transducer forward and backward, and is sent to the host computer in reverse for processing and display.

[0033] It should be noted that the main control unit controls the stepping motor to move according to the instruction after receiving the instruction, and the real-time moving distance of the motor is read in real time while controlling the transducer forward and backward, and is sent to the host computer in reverse for processing and display, which all belong to the conventional means in the field, and the functions thereof can be realized by the person skilled in the art without creative labor.

[0034] Specifically, the master control unit of the embodiment is implemented by using an STM32F407ZG series chip. The STM32F407ZG series is based on a high-performance ARM®CortexTM-M4F 32-bit RISC core, and has a working frequency of up to 168 MHz. The Cortex-M4F core function supports all ARM single-precision data processing instructions and single-precision floating-point units (FPU) of data types. It also implements a complete set of DSP instructions and a memory protection unit (MPU), thereby improving the security of the application program. The STM32F407ZG series adopts a high-speed embedded memory (up to 1 MB of flash memory and up to 192 KB of SRAM), up to 4 bytes of backup SRAM, and a wide range of enhanced I / O connections to two APB buses and peripherals, two AHB buses, and a 32-bit multi-AHB bus matrix. All STM32F407ZG devices provide 3 12-bit ADCs, two DACs, 1 low-power RTC, 12 general-purpose 16-bit timers including two PWM timers for motor control, two general-purpose 32-bit timers, and a true random number generator (RNG). At the same time, it is also equipped with standard and advanced communication interfaces, and is widely used in motor drive and application control, medical devices, industrial testing, etc. It can meet various control and testing indicators in project requirements.

[0035] Specifically, the encoder selects a large hollow shaft encoder ZKT8030, and the inner hole is 30 mm; the pulse is 5000; and the output mode is NPN output.

[0036] Specifically, CH9121 is a network serial port transparent chip. CH9121 internally integrates a TCP / IP protocol stack, can realize bidirectional transparent transmission of network data packets and serial port data, has four working modes of TCP CLIENT, TCP SERVER, UDP CLIENT, and UDP SERVER, and can support a serial port baud rate of up to 921600 bps. It can be easily configured through a host computer software or a serial port command, and is convenient and fast. Whether it is at the speed of 10 / 100M of the Ethernet end or at the communication speed of 921600 bps of the serial port end, it can meet the project requirements.

[0037] Please refer to Figure 3 The power supply of the sound path automatic adjustment device master control board mainly includes a 24V stepper motor and a 15V-to-12V / 3.3V DC-DC system power supply. The 24V stepper motor power supply is directly introduced from the internal switching power supply. In addition, 1.8V is supplied to the network chip.

[0038] Please refer to Figures 4 to 6, the system power supply is an external 24V power supply, mainly for powering the 24V motor, using input anti-reverse and anti-overvoltage circuit input. The 12V / 3.3V power module selects the TPS54302 power chip of TI company, the input voltage range is 4.5V-28V, the output voltage can be adjusted by external resistance, and the maximum can realize 3A load. The 1.8V power supply selects the TLV1117-1.8V power chip of TI company, and the LDO voltage stabilizing power supply.

[0039] The motor of the utility model embodiment selects 57 step motor, motor base 5780, matches 5 speed ratio reduction gearbox, the highest rotating speed can reach 900, the precision is high, the noise is small, and the torsion is big.

[0040] Please refer to Figure 7 The motor drive circuit TMC5160 integrates complete motion control function, high-quality current regulation function and powerful external MOSFET drive, covers a variety of high-efficiency systems powered by battery to 20 A motor coil current embedded applications. TMC5160 includes all the intelligence required to drive the motor. Configure TMC5160 target position to drive the motor. TMC5160 supports TRINAMICs unique StallGuard2, CoolStep, DcStep, SpreadCycle and StealthChop functions, optimizes the performance of the driver, balances the speed and motor torque, optimizes the energy efficiency, smooth and noiseless driving. In the embodiment, the precise step control of TMC5160 is used to realize the accurate rotation of the transducer driven by the stepping motor according to different rotating speeds, and the accurate collection of sonar signals is realized.

[0041] The rotating speed of the stepping motor is proportional to the pulse frequency, and the rotating speed calculation formula of the stepping motor is as follows:

[0042] ,

[0043] Wherein, n is the rotating speed of the motor, unit is revolution / min;F is the driving frequency, unit is Hz;T is the step angle, generally 0.9 ° or 1.8 °;X is the subdivision multiple of the driving chip, for example, in the embodiment, one revolution per second is required, the step angle of the stepping motor is fixed at 1.8 °, 360 ° is required to walk 200 steps, and the driving frequency f needs to take 1600 Hz, That is, one revolution per second, according to the formula, the rotating speed of the motor can be changed according to different speed modes, that is, the time required for the calibration device to complete the forward and return stroke is changed.

[0044] Please refer to Figure 8The utility model embodiment utilizes external proximity switch module and photoelectric coupling circuit to carry out joint MCU conduction control, and the specific working procedure is: when the transducer is in the induction range of the proximity switch, the internal circuit of the proximity switch is conducted, the output of photoelectric coupling TLP291-4 changes from high level to low level at this time, and then the level collection of the I / O port in the singlechip can judge whether the distance between the transducers is close to zero, so that the motor stops moving.

[0045] Need to explain is, the level collection of the I / O port in the singlechip can judge whether the distance between the transducers is close to zero, so that the motor stops moving, belong to the conventional means of the field, and the person skilled in the art can realize its function without paying creative labor, and the implementation mode of the utility model embodiment does not involve the improvement of control method or computer program.

[0046] Specifically, the external proximity switch module of the embodiment selects the DC type two-wire normally open proximity switch, the detection distance is 4mm±10%, the set distance is 0-3.6mm, the magnetic metal can be detected, the +12V power supply is powered, the proximity of the transducer can be detected and fed back to the singlechip by the internal switch, so that the control of the motor is realized.

[0047] Please refer to Figure 2 The utility model embodiment provides a kind of air sound range measuring device of acoustic detector, be equipped with the sound path automatic adjusting device, wherein, the encoder, motor drive circuit and proximity switch are configured to mobile platform, the transmission structure is connected with clamp, and the clamp is used to fix transducer.

[0048] Optionally, the device can be provided with a protective cover outside to reduce the influence of temperature changes on measurement results.

[0049] It should be understood that the utility model does not elaborate the content in detail, which can be regarded as conventional technology in the field.

[0050] Finally, it should be pointed out that: the above embodiments are only used to illustrate the technical solutions of the utility model, and not to limit them; although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: it can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement for part or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the technical solutions of the utility model embodiments.

Claims

1. An automatic sound path adjustment device, characterized by, The application relates to a sound transmission distance automatic adjusting device, which comprises a main control unit and a power supply unit, an input end of the main control unit is connected with an upper computer via a communication unit, an output end is connected with a motor driving circuit, an encoder and a proximity switch respectively, the motor driving circuit drives a step motor to work and drives a transmission structure of a transducer to transmit, the encoder collects the transmission distance of the transmission structure, and the proximity switch makes the main control unit collect the distance between a transmitting transducer and a receiving transducer when the proximity switch is turned on.

2. The sound path automatic adjustment apparatus according to claim 1, wherein The motor driving circuit is connected with a step motor, the proximity switch is connected with a proximity switch control photoelectric coupler, and the step motor, the proximity switch and the encoder are connected with the transmission structure of the transducer respectively.

3. The apparatus of claim 1, wherein The transmission structure comprises a ball screw.

4. The apparatus of claim 1, wherein The communication unit comprises a router, an RJ45 winch mainboard joint, a power cat module and a network chip which are connected in sequence, and the network chip is connected with the main control unit.

5. The apparatus of claim 1, wherein The main control unit is connected with an encoder joint and a control photoelectric coupler of the proximity switch via a serial port.

6. The apparatus of claim 1, wherein The power supply unit comprises a 24V step motor power supply circuit and a 15V-to-12V / 3.3V DC-DC circuit.

7. The apparatus of claim 1, wherein The encoder adopts a large hollow shaft encoder ZKT8030.

8. The apparatus of claim 1, wherein The main control unit adopts an STM32F407ZG series chip.

9. The apparatus of claim 1, wherein The sound transmission distance automatic adjusting device is provided with a protective cover.

10. An air sound range measuring device for a sound wave detector, characterized by The sound transmission distance automatic adjusting device is provided with the encoder, the motor driving circuit and the proximity switch, the transmission structure is connected with a clamp, and the clamp is used for fixing the transducer.

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