CN104390673A - Liquid indicator based on laser ranging - Google Patents
Liquid indicator based on laser ranging Download PDFInfo
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- CN104390673A CN104390673A CN201410603107.5A CN201410603107A CN104390673A CN 104390673 A CN104390673 A CN 104390673A CN 201410603107 A CN201410603107 A CN 201410603107A CN 104390673 A CN104390673 A CN 104390673A
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Abstract
The invention relates to a liquid indicator based on laser ranging. According to the liquid indicator based on laser ranging, a dip angle regulator is connected with a support; a bubble level meter and a shell are fixed on the dip angle regulator; a laser range scanner, a digital electronic level meter, a microprocessor module, a time and data storage module, an infrared remote controller module and a power supply module are arranged in a space surrounded by the shell and the dip angle regulator; an electronic display module is fixed on the shell. The digital electronic level meter is used for ensuring the incident laser beam to be vertical to the measured liquid level. According to the liquid indicator based on laser ranging, the high-precision perpendicularity of the laser beam emitted by the laser range scanner and the measured liquid level can be maintained, and the height of the liquid level can be effectively and precisely measured.
Description
Technical field
The invention belongs to field of photoelectric technology, relate to a kind of liquid level gauge based on laser ranging.
Background technology
Liquid level measuring system common both at home and abroad can be divided into contact-type and non-contact type two kinds at present.Contact-type as hand gauging, float-type etc., non-contact type have radar type, ultrasonic type and laser type etc.With traditional float-type, hand gauging method is compared, radar type, ultrasonic type and laser type have suitable advantage in technology content and measuring accuracy, but due to the restriction of price and environment for use, the liquid level gauge of radar type, ultrasonic type and laser type cannot be used at home on a large scale.Domestic current the most widely used liquid level gauge is the liquid level gauge of hand gauging and float-type, and the operation requirements of hand gauging to workman is higher, and when bad environments, there is serious potential safety hazard.
Laser measuring technique mainly utilizes laser ranging, and laser ranging is a kind of distance measuring method in light wave range finding, and light is propagated in atmosphere with speed C, and be T at A, B point-to-point transmission round trip required time, then A, B distance between two points D can represent with following: D=CT/2.In formula: D-A, B distance between two points; The speed that C-light is propagated in an atmosphere; T-light comes and goes A, B-required time.From above formula, A, B distance be measured and be actually the time T that will measure light and propagate.
When utilizing laser ranging method to measure, laser beam adjusting gear is installed.Conventional laser beam steering devices is install an air-bubble level on range finder using laser, finely tunes laser incident angle, by being placed in the level meter at laser instrument top to judge that whether laser beam is vertical with tested liquid level by regulating antagonism screw.There is comparatively big error in the degree of accuracy of this beam steering devices, can not ensure that laser range finder shoot laser and tested liquid level keep high-precision vertical, meanwhile, when laser beam injects liquid level to be measured with a certain small incident angle, the increase of measuring distance can cause larger error.
Summary of the invention
For above problem, the present invention proposes one makes laser beam and tested liquid level keep high-precision verticality, with the laser liquid-level counter device that time error is less.
The present invention by the following technical solutions.
The present invention includes laser range finder, digital and electronic level meter, microprocessor module, clock and data storage module, electronic display module, infrared remote control module, power module, tilt adjustment instrument, air-bubble level, support and shell.
Described tilt adjustment instrument is connected with support; Described air-bubble level and shell are fixed on tilt adjustment instrument, are provided with laser range finder, digital and electronic level meter, microprocessor module, clock and data storage module, infrared remote control module and power module in the space that shell and tilt adjustment instrument enclose; Described electronic display module is fixed on shell.
Wherein said laser range finder, digital and electronic level meter, infrared remote control module, clock and data storage module, electronic display module are connected with microprocessor module signal.
Described laser range finder, digital and electronic level meter, microprocessor module, clock and data storage module, electronic display module and infrared remote control module are powered by power module.
Described digital and electronic level meter is for ensureing that incident laser beam is vertical with tested liquid level.
The present invention is beneficial effect and advantage compared with prior art:
1) compare and conventional laser beam steering devices, the present invention uses digital and electronic level meter, and the laser beam that laser range finder can be made to send and tested liquid level keep high-precision verticality, effectively, accurately can measure liquid level.
2) accuracy of detection is high: liquid level measurement precision reaches 1.5mm magnitude.Detection speed is fast, can realize Real-time Collection and the storage of data.
3) compared to hand gauging, present invention, avoiding and contact with the direct of fluid to be measured, the internal environment of tank body can not be affected, realize telemeasurement.
4) the present invention is applied widely, can be used for the measurement of plurality of liquid liquid level.
5) the present invention have that precision is high, structure is simple, portability is strong, low-power consumption, low cost and other advantages.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention;
Fig. 2 is circuit block diagram of the present invention;
Fig. 3 is workflow schematic diagram of the present invention.
Embodiment
Below in conjunction with accompanying drawing, the present invention is further illustrated.
As depicted in figs. 1 and 2, of the present invention is a kind of liquid level gauge based on laser ranging, comprises laser range finder, digital and electronic level meter, microprocessor module, clock and data storage module, electronic display module 1, infrared remote control module, power module, tilt adjustment instrument 6, air-bubble level 5, support 4 and shell 2.
Described tilt adjustment instrument is connected with support; Described air-bubble level and shell are fixed on tilt adjustment instrument, are provided with laser range finder, digital and electronic level meter, microprocessor module, clock and data storage module, infrared remote control module and power module in the space that shell and tilt adjustment instrument enclose; Described electronic display module is fixed on shell.
Wherein said laser range finder, digital and electronic level meter, infrared remote control module, clock and data storage module, electronic display module are connected with microprocessor module signal.
Described laser range finder, digital and electronic level meter, microprocessor module, clock and data storage module, electronic display module and infrared remote control module are powered by power module.
Wherein digital and electronic level meter employs Analog Devices(and is called for short ADI) the 3D-MEMS technology of company, be combined with fixed software and ASIC treatment circuit, be the digital tilt angle sensor of a high resolving power, high precision, wide range, low-power consumption simultaneously.Twin shaft is measured, and can detect the change of pitch angle of X-axis, Y-axis, the measurement range of each axle is ± 90 degree, resolution <0.004 degree (single shaft is measured, within the scope of ± 25 degree).Built-in temperature sensor (inner for temperature compensation), reads temperature sampling data by serial ports.Power consumption is very low, and working current is 1mA only, is applicable to battery powered application.The stable performance of whole employing industrial devices, reliable, adopt electronic pastes embedding, protection against the tide, electrostatic prevention, radiation proof.Digital and electronic level meter have volume little, lightweight, be easy to integrated, cost performance advantages of higher.
When tested liquid level is in static, its reflecting surface is smooth, mirror-reflection can occur.When the laser that laser range finder sends is mapped to liquid level to be measured, its reflected light is parallel.There is comparatively big error in the degree of accuracy of conventional laser beam steering devices, can not ensure that laser range finder shoot laser and tested liquid level keep high-precision vertical, when laser beam injects liquid level to be measured with a certain small incident angle, the increase of measuring distance can cause larger error.The present invention adopts above-mentioned digital and electronic level meter, reasonable utilization optical principle, makes incident laser beam and tested liquid level keep higher vertical precision, reaches the object accurately measuring liquid level.
Microprocessor module have employed the STM32F103 series monolithic of ST Microelectronics.STM32F103 series monolithic has ARM32 position Cortex-M3 CPU, maximum operation frequency 72MHz, 1.25DMIPS/MHz.The flash storage of integrated 32-512KB on sheet.The SRAM memory of 6-64KB.The Power supply of 2.0-3.6V and the driving voltage of I/O interface.There are 3 kinds of low-power consumption modes: dormancy, stop, standby mode.There are 12 channel DMA controller, the A/D converter of the us level of 2 12,2 Channel 12-Bit D/A converters, the quick I/O port at most up to 112, at most nearly 11 timers.The integrated abundant interface of STM32F103 series monolithic, has 2 IIC interfaces (SMBus/PMBus), 5 USART interfaces, 3 SPI interfaces (18 Mbit/s), CAN interface (2.0B), and USB 2.0 is interface at full speed, SDIO interface.Greatly simplify the complexity of system.
Operation infrared remote control module can operate the zeroing of the X-axis of digital electrolevel, Y-axis, demarcates horizontal level face, measures after calibration.Operation infrared remote control module, can carry out zeroing operation to laser range finder, demarcate zero-bit, measure after calibration.
As shown in Figure 3, the course of work of the present invention: liquid level gauge is fixed on above liquid level to be measured by operation support.Knob 3 on adjustable inclination adjusting apparatus, makes the bubble in air-bubble level roughly be in center, carries out coarse adjustment to the horizontal level of device.Operation infrared remote control module, call number electrolevel, according to the XY shaft angle degree that electronic display module shows, adjustable inclination adjusting apparatus, makes XY angle all close to 0 degree.Operation infrared remote control module, call laser range finder, can select single measurement and continuous coverage state, end to be measured, electronic display module can show level gauging result data (height that the hard-wired height of support deducts laser ranging is tested liquid level).Operation infrared remote control module, can preserve current level measurement data and Measuring Time, to inquire about.
Apparatus of the present invention achieve the non-cpntact measurement to liquid level, according to the high accuracy number obliquity sensor of digital and electronic level meter, the laser beam that laser range finder is sent and tested liquid level keep high-precision verticality, effectively, accurately can measure liquid level, liquid level measurement precision reaches 1.5mm magnitude.
The above is only the preferred embodiment of the present invention, is not limited to the present invention, without departing from the inventive concept of the premise, can make some improvements and modifications etc., all should be included in protection scope of the present invention.
Claims (1)
1. based on the liquid level gauge of laser ranging, comprise laser range finder, digital and electronic level meter, microprocessor module, clock and data storage module, electronic display module, infrared remote control module, power module, tilt adjustment instrument, air-bubble level, support and shell, it is characterized in that:
Described tilt adjustment instrument is connected with support; Described air-bubble level and shell are fixed on tilt adjustment instrument, are provided with laser range finder, digital and electronic level meter, microprocessor module, clock and data storage module, infrared remote control module and power module in the space that shell and tilt adjustment instrument enclose; Described electronic display module is fixed on shell;
Wherein said laser range finder, digital and electronic level meter, infrared remote control module, clock and data storage module, electronic display module are connected with microprocessor module signal;
Described laser range finder, digital and electronic level meter, microprocessor module, clock and data storage module, electronic display module and infrared remote control module are powered by power module;
Described digital and electronic level meter is for ensureing that incident laser beam is vertical with tested liquid level.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410603107.5A CN104390673A (en) | 2014-10-30 | 2014-10-30 | Liquid indicator based on laser ranging |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410603107.5A CN104390673A (en) | 2014-10-30 | 2014-10-30 | Liquid indicator based on laser ranging |
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| CN104390673A true CN104390673A (en) | 2015-03-04 |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108645483A (en) * | 2018-04-03 | 2018-10-12 | 芜湖航飞科技股份有限公司 | Radar level gauge system |
| CN111189512A (en) * | 2020-02-25 | 2020-05-22 | 广州奥格智能科技有限公司 | Device and method for measuring liquid level and refractive index of transparent liquid based on laser ranging |
| CN111579433A (en) * | 2020-05-08 | 2020-08-25 | 北京华宇展业科技有限公司 | Magnetic suspension fluid on-line detector |
| CN111637950A (en) * | 2020-05-19 | 2020-09-08 | 哈尔滨工程大学 | Indoor leak protection water system based on infrared range finding |
| CN112903064A (en) * | 2021-01-21 | 2021-06-04 | 南京睿骥自动化有限公司 | High-temperature magnetic flap liquid level meter |
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| US20080190970A1 (en) * | 2007-02-13 | 2008-08-14 | Pyrotek, Inc. | Dosing system |
| CN201116933Y (en) * | 2007-09-21 | 2008-09-17 | 南京德朔实业有限公司 | Laser distance measuring instrument |
| CN202255358U (en) * | 2011-05-10 | 2012-05-30 | 中国石油化工股份有限公司 | Auxiliary vertical device of laser ranging device |
| CN103542912A (en) * | 2013-11-14 | 2014-01-29 | 中华人民共和国太仓出入境检验检疫局综合技术服务中心 | Laser water level gauge based on laser distance measurement |
| CN204301808U (en) * | 2014-10-30 | 2015-04-29 | 杭州电子科技大学 | A kind of liquid level gauge based on laser ranging |
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2014
- 2014-10-30 CN CN201410603107.5A patent/CN104390673A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20080190970A1 (en) * | 2007-02-13 | 2008-08-14 | Pyrotek, Inc. | Dosing system |
| CN201116933Y (en) * | 2007-09-21 | 2008-09-17 | 南京德朔实业有限公司 | Laser distance measuring instrument |
| CN202255358U (en) * | 2011-05-10 | 2012-05-30 | 中国石油化工股份有限公司 | Auxiliary vertical device of laser ranging device |
| CN103542912A (en) * | 2013-11-14 | 2014-01-29 | 中华人民共和国太仓出入境检验检疫局综合技术服务中心 | Laser water level gauge based on laser distance measurement |
| CN204301808U (en) * | 2014-10-30 | 2015-04-29 | 杭州电子科技大学 | A kind of liquid level gauge based on laser ranging |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108645483A (en) * | 2018-04-03 | 2018-10-12 | 芜湖航飞科技股份有限公司 | Radar level gauge system |
| CN111189512A (en) * | 2020-02-25 | 2020-05-22 | 广州奥格智能科技有限公司 | Device and method for measuring liquid level and refractive index of transparent liquid based on laser ranging |
| CN111579433A (en) * | 2020-05-08 | 2020-08-25 | 北京华宇展业科技有限公司 | Magnetic suspension fluid on-line detector |
| CN111637950A (en) * | 2020-05-19 | 2020-09-08 | 哈尔滨工程大学 | Indoor leak protection water system based on infrared range finding |
| CN112903064A (en) * | 2021-01-21 | 2021-06-04 | 南京睿骥自动化有限公司 | High-temperature magnetic flap liquid level meter |
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Application publication date: 20150304 |