CN204301808U - A kind of liquid level gauge based on laser ranging - Google Patents
A kind of liquid level gauge based on laser ranging Download PDFInfo
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- CN204301808U CN204301808U CN201420643159.0U CN201420643159U CN204301808U CN 204301808 U CN204301808 U CN 204301808U CN 201420643159 U CN201420643159 U CN 201420643159U CN 204301808 U CN204301808 U CN 204301808U
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Abstract
The utility model relates to a kind of liquid level gauge based on laser ranging.Tilt adjustment instrument in the utility model 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.Described digital and electronic level meter is for ensureing that incident laser beam is vertical with tested liquid level.The utility model 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 perpendicularity, effectively, accurately can measure liquid level.
Description
Technical field
The utility model belongs to field of photoelectric technology, relates 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-dipping, float-type etc., non-contact type have radar type, ultrasonic type and laser type etc.With traditional float-type, hand-dipping method is compared, radar type, ultrasonic type and laser type have suitable advantage in technology content and certainty of measurement, 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-dipping and float-type, and the operation requirements of hand-dipping 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 device is installed.Conventional laser beam steering devices is install an air-bubble level on range finder using laser, finely tunes laser incidence 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 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 incidence angle, the increase of measuring distance can cause larger error.
Summary of the invention
For above problem, the utility model proposes one and make laser beam and tested liquid level keep high-precision perpendicularity, with the laser liquid-level counter device that time error is less.
The utility model by the following technical solutions.
The utility model comprises 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 utility model is beneficial effect and advantage compared with prior art:
1) compare and conventional laser beam steering devices, the utility model 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 perpendicularity, 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-dipping, the utility model avoids and contacts with the direct of fluid to be measured, can not affect the internal environment of tank body, realize telemeasurement.
4) the utility model is applied widely, can be used for the measurement of plurality of liquid liquid level.
5) the utility model 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 the utility model structural representation;
Fig. 2 is the utility model circuit block diagram;
Fig. 3 is utility model works schematic flow sheet.
Detailed description of the invention
Below in conjunction with accompanying drawing, the utility model is further described.
As depicted in figs. 1 and 2, described in the utility model 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-resolution, high accuracy, 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 category of each axle is ± 90 degree, resolution ratio <0.004 degree (single shaft is measured, within the scope of ± 25 degree).Built-in temperature sensor (inner for temperature-compensating), reads temperature sampling data by serial ports.Power consumption is very low, and operating 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, antistatic, 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 reverberation is parallel.There is comparatively big error in the 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 incidence angle, the increase of measuring distance can cause larger error.The utility model 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 operating 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 utility model: 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 measurement 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.
The utility model device achieves 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 perpendicularity, effectively, accurately can measure liquid level, liquid level measurement precision reaches 1.5mm magnitude.
The above is only preferred embodiment of the present utility model, is not limited to the utility model, without departing from the concept of the premise utility, can make some improvements and modifications etc., all should be included in protection domain of the present utility model.
Claims (1)
1. the liquid level gauge based on 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 |
|---|---|---|---|
| CN201420643159.0U CN204301808U (en) | 2014-10-30 | 2014-10-30 | A kind of liquid level gauge based on laser ranging |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420643159.0U CN204301808U (en) | 2014-10-30 | 2014-10-30 | A kind of liquid level gauge based on laser ranging |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204301808U true CN204301808U (en) | 2015-04-29 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420643159.0U Expired - Fee Related CN204301808U (en) | 2014-10-30 | 2014-10-30 | A kind of liquid level gauge based on laser ranging |
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| Country | Link |
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| CN (1) | CN204301808U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104390673A (en) * | 2014-10-30 | 2015-03-04 | 杭州电子科技大学 | Liquid indicator based on laser ranging |
-
2014
- 2014-10-30 CN CN201420643159.0U patent/CN204301808U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104390673A (en) * | 2014-10-30 | 2015-03-04 | 杭州电子科技大学 | Liquid indicator based on laser ranging |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150429 Termination date: 20181030 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |