阅读说明：本技术 一种非接触式雷达水位测量装置 (Non-contact radar water level measuring device ) 是由 韩君 贺新 丁胜 张焕文 姜勇 刘伟 田磊 于 2021-09-15 设计创作，主要内容包括：本发明公开了一种非接触式雷达水位测量装置,它包括外壳组件、测量控制器、供电部件、微波天线,测量控制器置于外壳组件内,供电部件与测量控制器电性连接,外壳组件包括底壳、外盖、内盖,测量控制器包括数据采集单元、通信单元、控制处理单元,数据采集单元设置有雷达模块；数据采通信集单元、通信单元、控制处理单元分别集成在PCB基板上,相邻的两PCB基板之间通过连接器进行连接；微波天线设置在底壳的底板上,并置于雷达模块的正下方。通过将测量控制器、供电部件、微波天线集为一体,并采用优化后的雷达波进行非接触式测量,实现了非接触方式下的水位测量、通信传输、数据存储、电能供应及装置外壳一体化,可用于应用于多种野外水位测量场景。(The invention discloses a non-contact radar water level measuring device, which comprises a shell assembly, a measuring controller, a power supply part and a microwave antenna, wherein the measuring controller is arranged in the shell assembly, the power supply part is electrically connected with the measuring controller, the shell assembly comprises a bottom shell, an outer cover and an inner cover, the measuring controller comprises a data acquisition unit, a communication unit and a control processing unit, and the data acquisition unit is provided with a radar module; the data acquisition and communication collection unit, the communication unit and the control processing unit are respectively integrated on the PCB substrates, and two adjacent PCB substrates are connected through a connector; the microwave antenna is arranged on the bottom plate of the bottom shell and is arranged right below the radar module. By integrating the measurement controller, the power supply part and the microwave antenna and adopting the optimized radar waves to carry out non-contact measurement, the integration of water level measurement, communication transmission, data storage, electric energy supply and device shell in a non-contact mode is realized, and the device can be applied to various outdoor water level measurement scenes.)

1. A non-contact radar water level measuring device is characterized in that: the microwave antenna measurement device comprises a shell assembly, a measurement controller, a power supply part and a microwave antenna, wherein the power supply part is electrically connected with the measurement controller; the data acquisition unit, the communication unit and the control processing unit are respectively integrated on the PCB substrates, and two adjacent PCB substrates are connected through a connector; the microwave antenna is arranged on the bottom plate of the bottom shell and is arranged right below the radar module.

2. The non-contact radar level gauge according to claim 1, wherein: the communication unit comprises a communication module and an SIM card, wherein the communication module is provided with an SIM card interface; the control processing unit comprises a microprocessor, a debugging interface, a data transmission interface and a power supply interface.

3. The non-contact radar level gauge according to claim 1, wherein: the power supply part comprises a lithium battery which is electrically connected with the power interface; the lithium battery is also connected with a charging controller, the charging controller is provided with a charging management interface and a lithium battery interface, and the charging management interface is inserted with a charging management chip; the charging controller is connected with a waterproof aviation plug, and one end of the waterproof aviation plug is connected to an external power supply through a cable.

4. The non-contact radar level gauge according to claim 2, wherein: the control processing unit also comprises a JTAG interface which is divided into a main interface and an auxiliary interface.

5. The non-contact radar level gauge according to claim 2, wherein: the debugging interface is a Bluetooth debugging interface, a Bluetooth module corresponding to the Bluetooth debugging interface is arranged on the control processing unit, and the control processing unit further comprises a status indicator lamp interface which is externally connected with a status indicator lamp.

6. The non-contact radar level gauge according to claim 2, wherein: the control processing unit also comprises at least three signal indicator lamps; the color of each signal indicator lamp is different; the inner cup is provided with a light guide column, the light guide column is made of transparent materials, the upper portion of the light guide column penetrates through the inner cup, the lower portion of the light guide column is arranged right above the indicating lamp, and a perspective window is arranged at the position, corresponding to the light guide column, of the outer cover.

7. The non-contact radar level gauge according to claim 1, wherein: in the measurement controller, a connector between the control processing unit and the data acquisition unit is an onboard connector, the onboard connector is a 50-bit double-row straight needle, and the distance between the row needles is 0.5 mm; the connector between the control processing unit and the communication unit is a pin header connector, the pin header connector is a 10-bit double-row straight pin, and the distance between the pins is 2.0 mm.

8. The non-contact radar level gauge according to claim 1, wherein: the baffle is arranged in the bottom shell and divides the bottom shell into a first accommodating part and a second accommodating part; the inner cover matched with the first containing part in the bottom shell is a first inner cover, the inner cover matched with the first containing part in the bottom shell is a second inner cover, and the outer cover is also provided with air holes.

9. The non-contact radar level gauge according to any of claims 1 to 8, wherein: the microwave antenna is a hemispherical lens, the surface roughness of the hemispherical lens is less than or equal to 3.2 mu m, and the plane of the hemispherical lens is tightly attached to the inner surface of the lower part of the bottom shell; and is fixed by a positioning shell.

10. The non-contact radar level gauge according to any of claims 1 to 8, wherein: the microwave antenna is a horn-shaped sleeve, the upper portion of the sleeve is a small opening, the lower portion of the sleeve is a large opening, the large opening of the sleeve is tightly attached to the surface of the bottom shell bottom plate, and the data acquisition unit penetrates through the small opening and is arranged inside the sleeve.

Technical Field

The invention relates to a water level measuring device, in particular to a non-contact radar water level measuring device.

Background

The city flood control planning is the necessary work of city development, and the first work of flood control is the monitoring promptly, to the monitoring of water level or flow, for real-time supervision or the change of prejudgement water level, adopts water level measuring device to gather water level numerical value at present, can know the water level change through the numerical value comparison. The water level collection device on the market at present mainly is the contact structure, and contact water level monitoring device's measurement accuracy receives quality of water influence easily with life-span, especially the sewage that corrosivity is strong, leads to contact water level monitoring device's use scene to receive certain restriction.

Disclosure of Invention

The invention aims to provide a non-contact radar water level measuring device, which can realize accurate measurement of water level and data transmission in a non-contact mode by installing a measurement controller in a shell assembly and optimizing radar beams through a microwave antenna.

In order to achieve the purpose, the invention adopts the technical scheme that: a non-contact radar water level measuring device comprises a shell assembly, a measuring controller, a power supply component and a microwave antenna, wherein the power supply component is electrically connected with the measuring controller; the measurement controller comprises a data acquisition unit, a communication unit and a control processing unit, wherein the data acquisition unit is provided with a radar module; the data acquisition unit, the communication unit and the control processing unit are respectively integrated on the PCB substrates, and two adjacent PCB substrates are connected through a connector; the microwave antenna is arranged on the bottom plate of the bottom shell and is arranged right below the radar module.

When the radar water level measuring device is in a use state, the radar waves emitted by the radar module are subjected to wave beam optimization through the microwave antenna, the directivity of the radar waves is enhanced, and the penetrating performance of the radar waves is improved. The data collected by the data collecting unit is output to the control processing unit, the control processing unit is used for storing and processing the data, and the communication unit is used for sending the processed collected data to the outer end, so that the non-contact water level measurement and data transmission are realized.

Preferably, the communication unit comprises a communication module and an SIM card, and the communication module is provided with an SIM card interface; the control processing unit comprises a microprocessor, a debugging interface, a data transmission interface and a power supply interface. And the measurement controller is connected with the whole network communication antenna through an antenna joint.

Through the further optimization, the downloading and function upgrading or repairing of the control program in the water level measuring device are realized.

Preferably, the power supply component comprises a lithium battery, and the lithium battery is connected with a power interface wire; the lithium battery is also connected with a charging controller, the charging controller is provided with a charging management interface and a lithium battery interface, and the charging management interface is inserted with a charging management chip; the charging controller is connected with a waterproof aviation plug, and one end of the waterproof aviation plug is connected to an external power supply through a cable.

Through the further optimization, the charging control of the external power supply to the lithium battery is realized, and the continuous supplement of the power supply part to the electric energy required by the water level measuring device is realized.

Preferably, the control processing unit further includes a JTAG interface, and the JTAG interface is divided into a main interface and an auxiliary interface.

Through the further optimization, the interface selection of function upgrading and function repairing of the water level measuring device is realized during program downloading, and the operation efficiency of the water level measuring device is improved.

Preferably, the debugging interface is a bluetooth debugging interface, a bluetooth module corresponding to the bluetooth debugging interface is arranged on the control processing unit, and the control processing unit further comprises a status indicator lamp interface externally connected with a status indicator lamp.

Through the further optimization, the running state of the Bluetooth module is conveniently tested, and short-distance wireless communication is realized. And meanwhile, a status indicator lamp interface is added to realize that the debugging status can be directly known through an external debugging lamp in the debugging work.

Preferably, the control processing unit further comprises at least three signal indicating lamps; the color of each signal indicator lamp is different; the inner cover is provided with a light guide column, the light guide column is made of transparent materials, the upper part of the light guide column penetrates through the inner cover, and the lower part of the light guide column is arranged right above the indicator light; and a perspective window is arranged on the outer cover at the position corresponding to the light guide column.

The function that increases the pilot lamp lies in, can audio-visual understanding be used for showing the state of signals such as power, network, bluetooth through the pilot lamp, because place the shell subassembly in the measurement controller in, transmit the bright information of signal indicator lamp to the subassembly shell outside through the leaded light post, whether switch on more can audio-visual understanding power, network, bluetooth etc..

Preferably, in the measurement controller, a connector between the control processing unit and the data acquisition unit is an onboard connector, the onboard connector is a 50-bit double-row straight needle, and the distance between the two rows of needles is 0.5 mm; the connector between the control processing unit and the communication unit is a pin header connector, the pin header connector is a 10-bit double-row straight pin, and the distance between the pins is 2.0 mm.

Further, a baffle is arranged inside the bottom shell, and the baffle divides the inside of the bottom shell into a first accommodating part and a second accommodating part; the inner cover matched with the first containing part in the bottom shell is a first inner cover, the inner cover matched with the first containing part in the bottom shell is a second inner cover, and the outer cover is also provided with air holes.

As a scheme of one embodiment, the microwave antenna is a hemispherical lens, the surface roughness of the hemispherical lens is less than or equal to 3.2 μm, and the plane of the hemispherical lens is tightly attached to the inner surface of the lower part of the bottom shell; and is fixed by a positioning shell.

As another embodiment, the microwave antenna is a horn-shaped sleeve, the upper portion of the sleeve is a small opening, the lower portion of the sleeve is a large opening, the large opening of the sleeve is tightly attached to the inner surface of the lower portion of the bottom shell, and the data acquisition unit penetrates through the small opening and is arranged inside the sleeve.

Compared with the prior art, the invention has the advantages that:

1. the measurement controller integrates the data acquisition unit, the communication unit and the control processing unit into the measurement controller, and is arranged in the shell component, and meanwhile, the microwave antenna is arranged right below the measurement controller to optimize radar beams. The invention adopts radar wave non-contact measurement, is not influenced by external environments such as temperature, humidity, impurity bubbles and the like, and can continuously measure the water level, instantaneous flow and accumulated flow of a channel. The water level measurement, flow calculation, communication transmission, data storage, electric energy supply and device shell integration under the non-contact mode are realized.

2. The control processing unit of the measurement controller is provided with a data transmission interface, the data transmission interface can be externally connected with a display device to read the running log information of the device, meanwhile, an upgrading program can be downloaded through the data transmission interface, and a debugging end is externally connected with the debugging interface to perform function debugging; the program can be downloaded through a JTAG interface to realize the original setting of the functions of the water level measuring device; after the water level measuring device is put into use, the function upgrading or function repairing of the water level measuring device can be realized by downloading programs through the data transmission interface.

3. The shell assembly comprises a bottom shell, an outer cover and an inner cover, wherein the outer cover is matched with the outer edge of the upper end of the bottom shell, the inner cover is matched with the inner edge of the upper end of the bottom shell, and double protection is provided for a measurement controller arranged in the bottom shell through double matching of the outer cover, the inner cover and the bottom shell.

4. The built-in lithium battery is provided with the waterproof aviation connector, can be externally connected with a mains supply, a solar cell panel or other power supply devices to charge the lithium battery, realizes the continuous supply of electric energy of the water level measuring device, and is convenient to install and easy to maintain; the method can be used for various field water level flow monitoring scenes of water delivery channels such as irrigation area informatization, agricultural irrigation main channels, branch channels, bucket channels, agricultural channels and capillary channels.

Drawings

FIG. 1 is a simplified structural diagram of the present invention;

FIG. 2 is a structural view of the housing assembly of the present invention;

FIG. 3 is a schematic structural view of the present invention;

FIG. 4 is a block diagram of a measurement controller according to the present invention;

FIG. 5 is a first schematic diagram of the microwave antenna of the present invention;

fig. 6 is a structural diagram of a microwave antenna according to the present invention, which is shown in fig. two.

In the figure: the device comprises a shell assembly 1, a measurement controller 2, a power supply part 3, a microwave antenna 4, an antenna joint 5, a waterproof aviation plug 6, a light guide column 7, a communication unit 2-1, a SIM card interface 2-11, a communication antenna interface 2-12, a control processing unit 2-2, a data acquisition unit 2-3, a pin header connector 2-4, an onboard connector 2-5, a Bluetooth debugging interface 2-21, a Bluetooth module 2-22, a data transmission interface 2-23, a status indicator lamp interface 2-24, an auxiliary interface 2-25, a reed switch interface 2-26, a signal indicator lamp 2-27, a main interface 2-28, a microprocessor 2-29, a power supply interface 2-210, a radar module 2-31, a bottom shell 1-1, a connecting part 1-2, a power supply part 2-31, a bottom shell 1-1, a connecting part 2, The air-permeable baffle plate comprises a baffle plate 1-3, a second inner cover 1-4, an outer cover 1-5, a first inner cover 1-6, a waterproof gasket 1-7, air holes 1-8, a second accommodating part 1-9, a first accommodating part 1-10, a sleeve 4-11, a hemispherical lens 4-21 and a positioning shell 4-22.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention, and it is obvious that the described embodiments are some embodiments of the present invention, but not all embodiments. Various modifications and alterations to the invention will become apparent to those skilled in the art. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the invention, are within the scope of the invention.

In the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; the connection can be mechanical connection or electrical connection; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to specific situations. The invention will be further described with reference to the accompanying drawings and specific embodiments.

Referring to fig. 1, a non-contact radar water level measuring device comprises a housing assembly 1, a measurement controller 2, a power supply part 3 and a microwave antenna 4; the power supply part 3 is electrically connected with the measurement controller 2, referring to fig. 3 and 4, the measurement controller 2 comprises a communication unit 2-1, a control processing unit 2-2 and a data acquisition unit 2-3, the communication unit 2-1, the control processing unit 2-2 and the data acquisition unit 2-3 are respectively integrated on a PCB substrate, and the measurement controller 2 can have a plurality of PCB substrates according to the functional requirements of the water level measuring device. In this embodiment, the communication unit 2-1 is integrated on a first PCB substrate, the control processing unit 2-2 is integrated on a second PCB substrate, the data acquisition unit 2-3 is integrated on a third PCB substrate, and the communication unit 2-1 includes

The communication antenna interface 2-12 and the SIM card, wherein the communication antenna interface 2-12 is externally connected with a full-network communication antenna through an antenna joint 5; the control processing unit 2-2 comprises a microprocessor 2-29, a debugging interface, a data transmission interface 2-23, a power supply interface 2-210 and a reed pipe interface 2-26, wherein the reed pipe interface 2-26 is connected with a reed pipe; when the strong magnetic switch is close to the reed pipe, the water level measuring device can be activated. The data acquisition unit 2-3 is provided with a radar module 2-31, and the measurement controller 2 is placed inside the housing assembly 1, wherein the radar module 2-31 is positioned downwards. The communication unit 2-1 comprises a communication module and an SIM card, wherein an SIM card interface 2-11 is designed on the communication module; and inserting the SIM card into the SIM card interfaces 2-11, and accessing the network through the SIM card to realize remote data communication. Two adjacent PCB substrates are connected through a connector to realize the connection of signals and currents among the communication unit 2-1, the control processing unit 2-2 and the data acquisition unit 2-3. The connector between the control processing unit 2-2 and the data acquisition unit 2-3 is an on-board connector 2-5, the on-board connector 2-5 is a 50-bit double-row straight needle, and the distance between the row needles is 0.5 mm; the connector between the control processing unit 2-2 and the communication unit is a pin header connector 2-4, the pin header connector 2-4 is a 10-bit double-row straight pin, and the pin header space is 2.0 mm. The measuring controller 2 is externally connected with a program editing device through a data transmission interface 2-23 for downloading programs, a calculation formula or a model of flow is compiled into a control program and is burnt and written into the microprocessor 2-29, the measured water level data is stored and preprocessed through the microprocessor 2-29, meanwhile, the flow is calculated according to the control program, and then the water level data or/and the flow data are transmitted to a terminal receiving device through the communication unit 2-1.

In order to further explain the working principle of the measurement controller 2 in this embodiment, the components involved in the measurement controller 2 are specifically defined and described, in this embodiment, the microprocessor includes a microprocessor chip STM32L4R 5; the radar modules 2-31 mainly comprise radar sensors and level conversion chips, and the radar sensors comprise radar agility transceiver chips A111. The micro-processing chip STM32L4R5 is connected with a power supply system; the micro-processing chip STM32L4R5 is respectively connected with the radar agility transceiver chip A111, the power conversion circuit and the communication module, and the power conversion circuit is connected with the radar agility transceiver chip A111 and the communication module; the power supply conversion circuit comprises a lithium battery and a switch voltage regulation chip TPS78233, the communication module is provided with a communication circuit, and the communication circuit comprises a CAT1 remote transmission communication circuit. The CAT1 remote communication circuit comprises a CAT1 module A7670, and the microprocessor chip STM32L4R5 is connected with a CAT1 module A767. CAT1 module a7670 connects SIM cards. Pins 25 and 26 of the microprocessor chip STM32L4R5 are connected to pins 15 and 16 of the CAT1 module A7670C, respectively, and pin 54 of the microprocessor chip STM32L4R5 controls the power supply of the CAT1 module A7670 through a transistor AP 2305. Pins 29, 32, 35, 36, 37, 47, 48, 51 of the microprocessor chip STM32L4R5 are connected to communication and control pins of the radar agile transceiver chip a111, respectively. Therefore, data communication and instruction transmission between the micro-processing chip STM32L4R5 and the radar agile transceiver chip A111 are achieved, the micro-processing chip STM32L4R5 has extremely low power consumption and good performance, and tasks required to be executed comprise communication, liquid level data receiving, calculation and the like. The radar agility transceiver chip A111 can drive to send out a microwave signal, the propagation speed of the microwave signal is a fixed value, namely the light velocity c, therefore, after the radar agility transceiver chip A111 receives the microwave signal reflected by the liquid level through the receiving antenna, the time for transceiving is t, the radar agility transceiver chip A111 can process the microwave signal and calculate the liquid level height through the microprocessing chip STM32L4R5, the distance s between the liquid level meter and the liquid level is actually calculated first, the specific calculation formula is s ═ ct/2, the height is erected by the liquid level meter during installation, and the liquid level height can be calculated by subtracting s. Of course, in this principle description we consider the gauge as a point, for the purpose of facilitating understanding, and the specific height of its transmitting and receiving antenna may need to be considered in the actual distance calculation to make the result more accurate. The communication unit 2-1 is provided with a level conversion circuit which converts the level of the output signal of the communication chip in the communication module to be consistent with the level of the micro-processing chip STM32L4R5, so that the communication between the communication module and the micro-processing chip STM32L4R5 is normally carried out. The communication antenna is externally connected with the communication antenna through the communication antenna interface to realize the receiving and sending of the communication signals of the water level measuring device. In the measurement controller 2, the radar modules 2-31 realize the generation, transmission, reception and data preliminary processing of radar waves; the level conversion chip converts the level of the output signal of the radar module 2-31 to be consistent with the level of the micro-processing chip STM32L4R5, so that the communication between the radar module 2-31 and the micro-processing chip STM32L4R5 is normally carried out. It should be noted that the above description is only for the specific model and the specific electrical connection relationship of each component in the measurement controller 2, and those skilled in the art should understand that the present application is not limited by the specific model and the specific electrical connection relationship of the described components, because some other components may use other electrical connection relationships to achieve the same effect according to the present application. The embodiments described in the specification are preferred embodiments and should not be construed as limiting the scope of the invention, which is defined by the claims and their equivalents.

With continued reference to fig. 3 and 4, the power supply unit 3 includes a lithium battery, and further includes a switching voltage regulation chip TPS78233, the switching voltage regulation chip TPS78233, a schottky diode D1, and a plurality of resistors, inductors, and capacitors forming a 3.3V circuit. The lithium battery is connected with the power interface 2-210 by wires; the power supply to the measurement controller 2 is realized. The lithium battery is also connected with a charging controller, the charging controller is provided with a charging management interface and a lithium battery interface, and the charging management interface is inserted with a charging management chip; the charging controller is connected with a waterproof aviation plug 6, and one end of the waterproof aviation plug 6 is connected to an external power supply through a cable. The waterproof aviation plug is externally connected with a power supply, and the external power supply can be commercial power, a solar cell panel or other electric energy supply devices. The application scene of the water level measuring device is generally limited by the water level measuring operation environment, if a station house is arranged beside a channel or a river and commercial power is paved, the water level measuring device can be connected with a commercial power socket through a waterproof aviation plug 6 in a wired mode to charge a lithium battery, and electric energy supply is achieved. However, if the river or the channel is in a remote field and the commercial power is not available, the water level measuring device is required to adapt to the field operation environment, so that the solar panel is required to provide electric energy. The solar cell panel is used as the input end of the charging management chip, the lithium battery is used as the output end of the charging management chip, the charging management chip is internally provided with an ADC module and a micro control unit MCU, and the micro control unit MCU is internally provided with a voltage acquisition module; the ADC module collects voltage analog signals of the lithium battery, converts the input analog signals into digital signals and transmits the digital signals to the MCU; the micro control unit MCU controls the charging of the lithium battery through the collected lithium battery voltage information; when voltage is lower than the voltage charging threshold value set in the voltage acquisition module, the micro control unit MCU controls the charging management chip to charge the lithium battery through the solar cell panel, and when the electric quantity of the lithium battery is in a full-grid state, the charging is stopped, so that the electric energy supplement of the lithium battery is realized, and the electric energy supply problem of field use of the water level measuring device is solved.

Referring to fig. 1 and 2, the housing assembly 1 includes a bottom case 1-1, an outer cover 1-5, and an inner cover, the bottom case 1-1 is a cylindrical cavity with an opening at the upper end, and the measurement controller 2, the lithium battery, and the charging controller are disposed in the bottom case 1-1. Microwave antenna 4 is placed on the bottom plate of bottom case 1-1 and is located directly below radar modules 2-31. The top radius of the microwave antenna 4 is smaller than the bottom radius, the bottom of the microwave antenna is a plane, and the periphery of the microwave antenna is an arc surface; the method is used for optimizing the divergent electromagnetic waves into the parallel electromagnetic waves, and enhancing the directivity of the radar electromagnetic waves so as to improve the penetration performance of the radar waves. The outer cover 1-5 is matched with the outer edge of the upper end of the bottom shell 1-1, the inner cover is matched with the inner edge of the upper end of the bottom shell 1-1, and after the bottom shell 1-1 is matched with the outer cover 1-5 and the inner cover, the inner cover is positioned between the bottom shell 1-1 and the outer cover 1-5; a waterproof gasket 1-7 is arranged between the bottom shell 1-1 and the outer cover 1-5, the outer cover 1-5 is also provided with an air hole 1-8, a waterproof sleeve and a breathable film matched with the air hole 1-8. Due to the change of the environmental temperature and the pressure, the pressure difference can be formed between the internal environment and the external environment of the water level measuring device in the long-term use process, the internal environment and the external environment of the equipment are communicated with each other by arranging the air holes 1-8 on the shell, the temperature and the pressure of the internal environment and the external environment are balanced, and the radar wave is ensured not to deform; meanwhile, the waterproof sleeve and the breathable film play a role in preventing moisture and water for the equipment, improve the regional adaptability of the equipment in field operation, and reduce equipment faults caused by environmental factors.

The radar wave needs to penetrate the shell for liquid level measurement, the smaller the dielectric constant of the shell is, the better the radar wave penetration effect is, and in the commonly used materials, the ABS material has the advantages of relatively smaller dielectric constant, corrosion resistance and high strength, is suitable for the radar use environment, and is widely adopted. When the radar waves meet obstacles, reflection and refraction phenomena can occur, so that the power loss of the radar waves is caused, the thicker the bottom shell 1-1 is, the more the power loss is, the less the radar waves penetrate, and the measuring range and the measuring precision are also lower. Therefore, on the premise of ensuring the structural strength and the performance of the measuring device, in order to enable the radar waves emitted by the measuring controller 2 to have better penetration effect, the bottom plate of the bottom shell 1-1 is made of ABS material, and the dielectric constant can be selected to be 3.2-4.0F/m; the thickness of the bottom plate can be selected to be 1.375-1.537 mm, and through a large number of experiments and corrections, the bottom plate is made of ABS material with the dielectric constant of 3.4F/m and the thickness of 1.5mm to have the optimal effect.

With continued reference to fig. 2, further, a baffle plate 1-3 is disposed inside the bottom shell 1-1, and the baffle plate 1-3 divides the inner space of the bottom shell 1-1 into a first accommodating part 1-10 and a second accommodating part 1-9; the measurement controller 2 is arranged in the second accommodating part 1-9, and the microwave antenna is arranged at the bottom of the second accommodating part 1-9; the lithium battery and the charging controller are arranged in the first accommodating part 1-10. The inner lids are designed as a first inner lid 1-6 and a second inner lid 1-4, the inner lid which is fitted with the first receiving portion 1-10 is the first inner lid 1-6, and the inner lid which is fitted with the second receiving portion 1-9 is the second inner lid 1-4. The measurement controller 2 is separately arranged and fixed with the lithium battery and the charging controller, so that the collision among the lithium battery, the charging controller and the measurement controller 2 in the long-term use process is avoided, the failure rate of equipment is reduced, and the service life of the equipment is prolonged;

in order to make the outer cover 1-5 and the bottom shell 1-1 be connected in a better fit manner, a connecting part 1-2 is arranged at the upper part of the bottom shell 1-1, the connecting part 1-2 is designed to be polygonal, correspondingly, the outer cover 1-5 is also designed to be polygonal corresponding to the connecting part 1-2, a plurality of threaded connecting holes are arranged on the connecting part 1-2, and the bottom shell 1-1 and the outer cover 1-5 are fixed into a whole through threaded connection. The radar water level measuring device is convenient to install a protection device or on a survey bridge.

Referring to fig. 4, further, the control processing unit 2-2 further includes a JTAG interface, which is divided into a primary interface 2-28 and a secondary interface 2-25, wherein the primary interface 2-28 is used for externally connecting a program editing device, and the secondary interface 2-25 is used for selecting whether to download a program through the JTAG interface. The auxiliary interface 2-25 is composed of two metal pins, when the two metal pins are in short circuit connection, the auxiliary interface 2-25 is in a short circuit state, the measurement controller 2 downloads the program through the data transmission interface 2-23, when the two metal pins are not communicated, the auxiliary interface 2-25 is in a disconnection state, and the measurement controller 2 downloads the program through the JTAG interface. When the water level measuring device is put into use, the function upgrading or function repairing of the water level measuring device can be realized by downloading the program through the data transmission interfaces 2-23 when a large number of programs are not required to be downloaded after the water level measuring device is put into use.

Referring to fig. 4, further, the debugging interface is a bluetooth debugging interface 2-21, a bluetooth module 2-22 corresponding to the bluetooth debugging interface 2-21 is disposed in the control processing unit 2-2, the bluetooth debugging interface 2-21 is connected with the development software in the computer through a cable, and the running state of the bluetooth module 2-22 is tested to implement short-distance wireless communication. The measurement controller 2 can realize short-distance signal receiving and sending and parameter configuration, when the measurement controller 2 breaks down, the mobile terminal is placed in the signal identification range of the Bluetooth modules 2-22, Bluetooth of the mobile terminal is started, and then the fault finding work can be carried out. Meanwhile, the second PCB substrate is provided with status indicator light interfaces 2-24, and the status indicator light interfaces 2-24 are externally connected with status indicator lights. And during the operation of the water level measuring device, the state indicator lamp flickers once per second to indicate the normal operation of the water level measuring device.

Referring to fig. 3 and 4, further, at least three signal indicator lamps 2-27 are disposed on the second PCB substrate, and the color of each signal indicator lamp 2-27 is different for displaying the status of the power supply, the network, the bluetooth, and other signals, for example, when the power supply, the network, and the bluetooth are turned on, the power supply signal indicator lamp, the network signal indicator lamp, and the bluetooth signal indicator lamp are in an on state, otherwise, the signal indicator lamps 2-27 are in an off state. The Bluetooth indicator lamp flickers after Bluetooth is activated, and stops after Bluetooth is turned off; the network indicator light flashes once per second under the condition that the communication module is normally connected with the network, and the network indicator light is turned off when the network is abnormal. Through the states of the signal indicator lamps 2-27, whether a power supply, a network, Bluetooth and the like are connected or not can be judged. Because the measurement controller 2 is arranged inside the bottom shell 1-1, in order to visually observe the display state of the signal indicating lamps 2-27, the light guide column 7 is arranged on the inner cover, the light guide column 7 is a circular cylinder made of transparent materials, the upper part of the light guide column 7 penetrates through the inner cover and is fixed on the inner cover, the lower part of the light guide column 7 is arranged right above the signal indicating lamps 2-27, and the light of the signal indicating lamps 2-27 can be transmitted to the upper part of the light guide column 7 on the inner cover; meanwhile, a perspective window is arranged at the corresponding position on the outer cover 1-5; after the water level measuring device is installed, the display states of the signal indicating lamps 2-27 can be observed through the perspective window, and whether a power supply, a network, Bluetooth and the like are connected or not can be visually known.

When the strong magnetic switch is close to the reed pipe, the water level measuring device is activated, and the signal indicator lamps 2-27 are lighted. If define bluetooth signal indicator for red light, can regularly glimmer red indicator after water level measuring device's bluetooth activation, disconnect 3 minutes back water level measuring device of bluetooth and close the bluetooth linkage channel, can withdraw from the configuration mode.

Example 2

The working principle is the same as that of embodiment 1, except that the microwave antenna is optimized in this embodiment. Referring to fig. 5, the microwave antenna is designed to be a hemispherical lens 4-21, the surface roughness of the hemispherical lens 4-21 is less than or equal to 3.2 μm, and the plane of the hemispherical lens 4-21 is tightly attached to the bottom surface of the bottom shell 1-1; the positioning shell 4-22 is arranged outside the hemispherical lens 4-21, the positioning shell 4-22 is made of ABS material, the surface of the positioning shell is smooth, the two ends of the positioning shell are provided with lugs, the inner surface of the positioning shell 4-22 is tightly attached to the hemispherical lens 4-21 and is arranged right below the radar module 2-31 in the measurement controller 2, and the positioning shell 4-22 is fixed on the bottom shell 1-1 by passing a screw through the lugs, so that the half-hemispherical lens 4-21 is installed and fixed.

The radar wave beam emitted by the radar chip is conical, the radar wave can pass through the hemispherical lenses 4-21, and the phase velocity of the radar electromagnetic wave is adjusted through the surface shapes and the refractive indexes n of the hemispherical lenses 4-21 to obtain the plane wave on the radiation aperture. The radar electromagnetic wave has a wave-particle duality, and a refraction phenomenon occurs when the radar electromagnetic wave passes through different non-parallel media in the transmission process. The hemispherical lens 4-21 has a thick inner part and a thin edge, and radar electromagnetic waves are suppressed when passing through the hemispherical lens 4-21. The pressing has obvious effect on the centers of the hemispherical lenses 4-21, and the pressing path is long; and the pressing action is weak at the edge of the hemispherical lenses 4 to 21, and the pressing path is short. The spherical wave is processed by the hemispherical lenses 4-21 to form a plane wave, so that the directionality of electromagnetic radiation is enhanced, and the penetration performance of radar waves is improved.

The farther the distance between the radar chip and the hemispherical lens 4-21 is, the larger the diameter of the hemispherical lens 4-21 is, and the more easily the external environment interference is received. In order to ensure the optimization effect of the hemispherical lenses 4-21 on radar beams, the distance between the radar modules 2-31 and the hemispherical lenses 4-21 and the diameter of the hemispherical lenses 4-21 are selected, and only the radar waves are required to be transmitted out through the hemispherical lenses 4-21.

The other structures are the same as those of embodiment 1, and therefore, description thereof will not be repeated.

Example 3

As another embodiment of the invention, the operation principle is the same as that of embodiment 1, except that another design scheme is made for the microwave antenna in this embodiment. Referring to fig. 6, the microwave antenna 4 is a horn-shaped sleeve 4-11, the upper part of the sleeve 4-11 is a small opening, the lower part of the sleeve 4-11 is a large opening, and a fixing plate is arranged at the small opening of the sleeve 4-11 and used for fixing the sleeve 4-11 and the measurement controller together. The large opening of the sleeve 4-11 is tightly attached to the inner surface of the lower part of the bottom shell 1-1, and the radar module 2-31 penetrates through the small opening and is arranged inside the sleeve 4-11. The sleeve 4-11 reflects part of the radar wave and changes the propagation direction, so that the radar wave emitted by the radar module 2-31 is close to a cylindrical shape and is not diffused. The reflection area of the radar wave on the measured object is reduced, and the effect of optimizing the radar wave beam is achieved.

The other structures are the same as those of embodiment 1, and therefore, description thereof will not be repeated.