Radar liquid level meter

Abstract

The utility model discloses a radar liquid level meter, which is characterized in that a lens is arranged on a shell, so that radar waves emitted by a radar measurement module can be guided to the lens for focusing, and radar wave beams are emitted to the surface of measured liquid in a more concentrated manner, so that reflected radar wave signals are enhanced, and the measurement precision is improved. And meanwhile, the main control unit, the pose monitoring module, the wireless communication module and the radar measurement module are integrated in the shell, so that simplified installation and efficient data acquisition of the equipment are realized. The pose monitoring module can collect the pose data of the equipment in real time, so that the measurement accuracy is ensured; the wireless communication module is convenient to communicate with a cloud server, so that remote monitoring and management of data are realized; the radar measurement module is responsible for accurately collecting liquid level data. According to the utility model, the functions of the sensor, the remote measurement terminal unit (RTU) and the data transmission unit (DTU) are integrated, so that the intelligence and the flexibility of the radar liquid level meter are improved, and the application requirements of the radar liquid level meter in a complex environment are met.

Description

TECHNICAL FIELD

[0001] The utility model relates to liquid level measurement equipment field especially relates to a radar liquid level meter. BACKGROUND

[0002] In the field of liquid level measurement, radar liquid level meters are widely used due to their non-contact measurement, high precision, and good stability. However, with the increasing degree of industrial automation and the increasing diversification of application scenarios, higher requirements are placed on the functionality, reliability, and intelligence level of radar liquid level meters.

[0003] Radar liquid level meters primarily determine the position of the liquid level using radar wave propagation and reflection. Traditional radar liquid level meters mainly exist in the form of sensors, which require a host computer to read distance data from the radar liquid level meter through a communication interface such as RS485, then perform secondary calculations through a remote terminal unit (RTU) to obtain liquid level information, and finally aggregate the measurement information to a data management platform through a data transmission unit (DTU). Currently, the attitude of the radar liquid level meter is usually observed through a bubble level on the shell. This method cannot provide real-time feedback on changes in the attitude of the radar liquid level meter during subsequent use, which can lead to inaccurate liquid level measurements.

[0004] Therefore, traditional radar liquid level meters typically only have basic liquid level measurement functions, have a single communication method, and have limited data processing capabilities, making it difficult to meet application requirements in complex environments. SUMMARY

[0005] The technical problem to be solved by the utility model is to provide a radar liquid level meter that integrates multiple functions, improves the intelligence and flexibility of the radar liquid level meter, and meets application requirements in complex environments.

[0006] To solve the above technical problems, the utility model adopts the following technical scheme:

[0007] A radar liquid level meter includes a shell and a lens. The shell has a hollow window, and the lens is arranged at the hollow window. The shell contains a main control unit, a pose monitoring module, a wireless communication module, and a radar measurement module.

[0008] The first data acquisition end of the main control unit is connected to the pose monitoring module.

[0009] The first communication end of the main control unit is connected to the wireless communication module.

[0010] The second data acquisition end of the main control unit is connected to the radar measurement module, and the radar measurement module is located at the focal point of the lens.

[0011] The pose monitoring module is used for collecting real-time pose data of the equipment, the wireless communication module is used for communicating with the cloud server, the radar measurement module is used for collecting distance data between radar waves from the transmitting antenna to the liquid surface and reflecting back to the receiving antenna, and the main control unit is used for analyzing and processing the collected data.

[0012] Further, the housing is also provided with a power management module, the power management module includes a lithium battery pack, a power input circuit and a control unit;

[0013] The input end of the power input circuit is used for connecting an external power supply, and the output ends of the lithium battery pack and the power input circuit are connected to the input end of the control unit;

[0014] The output end of the control unit is connected to the power supply end of the main control unit;

[0015] The power management module is used for powering the equipment.

[0016] Further, the housing is also provided with a rain collection module, the rain collection module includes a pulse rain bucket and a rain collection circuit;

[0017] The input end of the rain collection circuit is connected to the pulse rain bucket, and the output end of the rain collection circuit is connected to the third data collection end of the main control unit;

[0018] The rain collection module is used for collecting rain data around the equipment.

[0019] Further, the housing is also provided with a Bluetooth debugging module;

[0020] The second communication end of the main control unit is connected to the Bluetooth debugging module;

[0021] The Bluetooth debugging module is used for configuring equipment parameters according to user debugging instructions.

[0022] Further, the housing is also provided with a wired communication module;

[0023] The third communication end of the main control unit is connected to the wired communication module;

[0024] The wired communication module is used for communicating with the host computer or accessing other sensors.

[0025] Further, the wireless communication module includes an LTE communication unit and a LoRa communication unit;

[0026] The first communication end of the main control unit is connected to the LTE communication unit and the LoRa communication unit respectively.

[0027] Further, a memory module is arranged in the shell.

[0028] A fourth communication end of the main control unit is connected with the memory module.

[0029] The memory module is used for storing acquisition data, device parameters and running data.

[0030] Further, the control unit comprises a power management chip.

[0031] The power input circuit comprises a voltage conversion chip, a first capacitor, a second capacitor, a third capacitor, a fourth capacitor, a fifth capacitor, a sixth capacitor, a first resistor, a second resistor, a third resistor and a first inductor.

[0032] One end of the first capacitor, the second capacitor, the third capacitor and the first resistor is used for connecting an external power supply, and the other end of the first capacitor, the second capacitor and the third capacitor is grounded.

[0033] The input end of the voltage conversion chip is used for connecting the external power supply, the enable end of the voltage conversion chip is connected with the other end of the first resistor, and the output end of the voltage conversion chip is respectively connected with one end of the second resistor, one end of the third resistor and the power supply input end of the power management chip.

[0034] The other end of the second resistor is respectively connected with one end of the fourth capacitor, one end of the fifth capacitor and one end of the first inductor, the other end of the fourth capacitor and the fifth capacitor is grounded, one end of the sixth capacitor is connected with the other end of the first inductor, the other end of the sixth capacitor is connected with the feedback end of the voltage conversion chip, and the other end of the third resistor is grounded.

[0035] The power supply output end of the power management chip is respectively connected with the power supply end of the main control unit and the lithium battery pack, and the control end of the power management chip is connected with the main control unit.

[0036] Further, the rain acquisition circuit comprises an interface module, a photoelectric coupler, a fuse, a fourth resistor, a fifth resistor, a seventh capacitor and an eighth capacitor.

[0037] The input end of the interface module is connected with the pulse rain barrel, the output end of the interface module is connected with one end of the fuse, and the other end of the fuse is respectively connected with the fourth resistor, the fifth resistor and one end of the seventh capacitor.

[0038] The other end of the fourth resistor is respectively connected with the other end of the fifth resistor, one end of the eighth capacitor and the cathode input end of the photoelectric coupler, and the other end of the seventh capacitor and the eighth capacitor is grounded.

[0039] The anode input end of the optoelectronic coupler is used for connecting a power supply voltage, the collector output end of the optoelectronic coupler is connected with the third data acquisition end of the master control unit respectively, and the emission output end of the optoelectronic coupler is grounded.

[0040] Further, the pose monitoring module comprises a pose sensor, a ninth capacitor, a sixth resistor, a seventh resistor and an eighth resistor.

[0041] The data end of the pose sensor is connected with the first data acquisition end of the master control unit, and the power supply end of the pose sensor is connected with one end of the ninth capacitor, the sixth resistor, the seventh resistor and the eighth resistor respectively.

[0042] The power supply end of the pose sensor is further used for connecting a power supply voltage, the other end of the ninth capacitor is grounded, the other end of the sixth resistor is connected with the control end of the pose sensor, and the other ends of the seventh resistor and the eighth resistor are connected with the data end of the pose sensor.

[0043] The radar liquid level meter has the advantages that the radar waves emitted by the radar measurement module can be guided to the lens for focusing, the radar beams are shot to the measured liquid surface in a more concentrated manner, the radar wave signals reflected back are enhanced, and the measurement precision is improved. Meanwhile, the master control unit, the pose monitoring module, the wireless communication module and the radar measurement module are integrated in the shell, the simplified installation and efficient data acquisition of the device are realized, the pose monitoring module can collect the attitude data of the device in real time, the measurement accuracy is ensured, the wireless communication module is convenient for communication with the cloud server, the remote monitoring and management of data are realized, and the radar measurement module is responsible for accurate collection of liquid level data. The functions of the sensor, the remote terminal unit (RTU) and the data transmission device (DTU) are integrated in one device, the intelligence and flexibility of the radar liquid level meter are realized, and the application requirements of the radar liquid level meter in complex environments are met. BRIEF DESCRIPTION OF DRAWINGS

[0044] Figure 1 A side view of the radar liquid level meter is provided for the embodiment of the utility model;

[0045] Figure 2 A module structure diagram of the radar liquid level meter is provided for the embodiment of the utility model;

[0046] Figure 3 A circuit structure diagram of the pose monitoring module is provided for the embodiment of the utility model;

[0047] Figure 4 Another module structure diagram of the radar liquid level meter is provided for the embodiment of the utility model;

[0048] Figure 5A circuit structure diagram of a control unit is provided for the embodiment of the utility model;

[0049] Figure 6 A circuit structure diagram of a power input circuit is provided for the embodiment of the utility model;

[0050] Figure 7 A module structure diagram of radar liquid level meter is provided for the embodiment of the utility model;

[0051] Figure 8 A circuit structure diagram of rain collection circuit is provided for the embodiment of the utility model;

[0052] Figure 9 A circuit structure diagram of Bluetooth debugging module is provided for the embodiment of the utility model;

[0053] Figure 10 A circuit structure diagram of wired communication module is provided for the embodiment of the utility model;

[0054] Figure 11 A circuit structure diagram of LTE communication unit is provided for the embodiment of the utility model;

[0055] Figure 12 A circuit structure diagram of LoRa communication unit is provided for the embodiment of the utility model;

[0056] Figure 13 A circuit structure diagram of memory module is provided for the embodiment of the utility model;

[0057] Label explanation:

[0058] 1, shell, 2, lens, 11, main control unit, 12, pose monitoring module, 13, wireless communication module, 14, radar measurement module, 15, power management module, 16, rain collection module, 17, Bluetooth debugging module, 18, wired communication module, 19, memory module, 131, LTE communication unit, 132, LoRa communication unit, 151, lithium battery pack, 152, power input circuit, 153, control unit, 101, waterproof joint, 161, rain collection circuit. Specific implementation

[0059] In order to explain the technical content, the purpose and effect of the utility model in detail, the following is explained in combination with the embodiment and the drawings.

[0060] The embodiment of the utility model provides a kind of radar liquid level meter, including shell and lens, the shell is provided with hollow window, the lens is set at the hollow window, main control unit, pose monitoring module, wireless communication module and radar measurement module are set in the shell;

[0061] The first data acquisition end of the master control unit is connected with the position monitoring module;

[0062] The first communication end of the master control unit is connected with the wireless communication module;

[0063] The second data acquisition end of the master control unit is connected with the radar measurement module, and the radar measurement module is located at the focal point of the lens;

[0064] The position monitoring module is used for collecting real-time position data of the equipment, the wireless communication module is used for communicating with the cloud server, the radar measurement module is used for collecting distance data between radar waves emitted from the transmitting antenna to the liquid surface and reflected back to the receiving antenna, and the master control unit is used for analyzing and processing the collected data.

[0065] From the above description, the beneficial effects of the utility model are that: through setting the lens on the shell, the radar waves emitted by the radar measurement module can be guided to the lens for focusing, the radar beam is shot to the measured liquid surface in a more concentrated manner, so that the reflected radar wave signal is enhanced, and the measurement precision is improved. Meanwhile, the master control unit, the position monitoring module, the wireless communication module and the radar measurement module are integrated in the shell, realizing the simplified installation and efficient data collection of the equipment. The position monitoring module can collect the attitude data of the equipment in real time, ensuring the measurement accuracy; the wireless communication module is convenient for communicating with the cloud server, realizing the remote monitoring and management of data; and the radar measurement module is responsible for accurately collecting the liquid level data. The utility model integrates the functions of the sensor, the telemetry terminal equipment (RTU) and the data transmission equipment (DTU), improves the intelligence and flexibility of the radar liquid level meter, and meets the application requirements of the radar liquid level meter in complex environments.

[0066] Further, the shell further comprises a power management module, the power management module comprises a lithium battery pack, a power input circuit and a control unit;

[0067] The input end of the power input circuit is used for connecting an external power supply, and the input end of the control unit is connected with the output end of the lithium battery pack and the power input circuit;

[0068] The output end of the control unit is connected with the power supply end of the master control unit;

[0069] The power management module is used for supplying power to the equipment.

[0070] From the above description, by adding the power management module, the radar liquid level meter has a more reliable power supply system. The lithium battery pack serves as a backup power supply, ensuring the continuous operation of the equipment in the event of external power failure. Meanwhile, the control unit can manage the charging and discharging of the lithium battery pack through the power input circuit, ensuring the power supply of the equipment.

[0071] Further, the shell is also provided with a waterproof joint, and the shell is also provided with a rainfall collection module near the waterproof joint.

[0072] The input end of the rainfall collection circuit is used to connect a pulse rainfall bucket through the waterproof joint, and the output end of the rainfall collection circuit is connected to the third data collection end of the main control unit.

[0073] The rainfall collection module is used to collect rainfall data around the equipment.

[0074] As can be seen from the above description, the addition of the rainfall collection module enables the radar liquid level meter to monitor rainfall data at the same time, expanding the application scenarios of the equipment. The cooperation of the pulse rainfall bucket and the rainfall collection circuit realizes accurate collection and real-time monitoring of rainfall.

[0075] Further, the shell is also provided with a Bluetooth debugging module.

[0076] The second communication end of the main control unit is connected to the Bluetooth debugging module.

[0077] The Bluetooth debugging module is used to configure equipment parameters according to user debugging instructions.

[0078] As can be seen from the above description, the integration of the Bluetooth debugging module greatly facilitates the on-site debugging and configuration of the equipment. Users can set and adjust the parameters of the equipment in real time through a terminal such as a mobile phone, without relying on complex external equipment, reducing the difficulty and time cost of debugging.

[0079] Further, the shell is also provided with a wired communication module.

[0080] The third communication end of the main control unit is connected to the wired communication module.

[0081] The wired communication module is used to communicate with an upper computer or access other sensors.

[0082] As can be seen from the above description, the addition of the wired communication module enables the radar liquid level meter to directly communicate with other sensors or an upper computer, realizing real-time transmission and sharing of data, improving the compatibility and expandability of the equipment, and meeting the needs of diversified application scenarios.

[0083] Further, the wireless communication module includes an LTE communication unit and a LoRa communication unit.

[0084] The first communication end of the main control unit is connected to the LTE communication unit and the LoRa communication unit, respectively.

[0085] From the above description, it can be known that the LTE communication unit is suitable for scenarios requiring real-time and high-speed transmission of a large amount of liquid level data, and the LoRa communication unit is suitable for liquid level monitoring in remote, low-power and complex environments. The wireless communication module includes the LTE communication unit and the LoRa communication unit, providing users with more flexible networking options. According to actual needs and environmental conditions, users can freely choose a suitable communication mode to ensure stable data transmission and efficient management.

[0086] Further, the housing is also provided with a memory module;

[0087] The fourth communication end of the main control unit is connected to the memory module;

[0088] The memory module is used to store collected data, device parameters and running data.

[0089] From the above description, it can be known that the integration of the memory module enables the radar liquid level meter to store a large amount of collected data, device parameters and running data, facilitating users to trace and analyze historical data.

[0090] Further, the control unit includes a power management chip;

[0091] The power input circuit includes a voltage conversion chip, a first capacitor, a second capacitor, a third capacitor, a fourth capacitor, a fifth capacitor, a sixth capacitor, a first resistor, a second resistor, a third resistor and a first inductor;

[0092] One end of the first capacitor, the second capacitor, the third capacitor and the first resistor is used to connect an external power supply, and the other end of the first capacitor, the second capacitor and the third capacitor is grounded;

[0093] The input end of the voltage conversion chip is used to connect the external power supply, the enable end of the voltage conversion chip is connected to the other end of the first resistor, and the output end of the voltage conversion chip is respectively connected to one end of the second resistor, one end of the third resistor and the power supply input end of the power management chip;

[0094] The other end of the second resistor is respectively connected to one end of the fourth capacitor, one end of the fifth capacitor and one end of the first inductor, the other end of the fourth capacitor and the fifth capacitor is grounded, one end of the sixth capacitor is connected to the other end of the first inductor, the other end of the sixth capacitor is connected to the feedback end of the voltage conversion chip, and the other end of the third resistor is grounded;

[0095] The power supply output end of the power management chip is respectively connected to the lithium battery pack and the power supply end of the main control unit, and the control end of the power management chip is connected to the main control unit.

[0096] From the above description, the external power supply is filtered by the first to third capacitors to ensure the stability and purity of the input voltage. The voltage conversion chip converts the external power supply voltage into the power supply voltage of the main control unit for output. The first to third resistors are used for current detection and voltage division to control the output state of the voltage, while the first inductor stores and releases energy and feeds back the voltage to the voltage conversion chip, so that the voltage conversion chip can adjust the output to ensure stable voltage.

[0097] Further, the rain collection circuit comprises an interface module, a photocoupler, a fuse, a fourth resistor, a fifth resistor, a seventh capacitor and an eighth capacitor.

[0098] The input end of the interface module is used to connect the pulse rain bucket through the waterproof joint, and the output end of the interface module is connected to one end of the fuse. The other end of the fuse is respectively connected to the fourth resistor, the fifth resistor and one end of the seventh capacitor.

[0099] The other end of the fourth resistor is respectively connected to the other end of the fifth resistor, one end of the eighth capacitor and the cathode input end of the photocoupler. The other ends of the seventh capacitor and the eighth capacitor are grounded.

[0100] The anode input end of the photocoupler is used to connect the power supply voltage, and the collector output end of the photocoupler is respectively connected to the third data acquisition end of the main control unit. The emitter output end of the photocoupler is grounded.

[0101] From the above description, when the water quantity in the rain bucket reaches the preset value, the rain bucket will generate a corresponding pulse signal. Each pulse signal of the rain bucket will generate an interrupt signal to the main control unit through the rain collection circuit. The main control unit will increase the current rain by a fixed value after receiving each interrupt signal, thereby realizing the rain collection function.

[0102] Further, the pose monitoring module comprises a pose sensor, a ninth capacitor, a sixth resistor, a seventh resistor and an eighth resistor.

[0103] The data end of the pose sensor is connected to the first data acquisition end of the main control unit, and the power supply end of the pose sensor is respectively connected to one end of the ninth capacitor, the sixth resistor, the seventh resistor and the eighth resistor.

[0104] The power supply end of the pose sensor is also used to connect the power supply voltage. The other end of the ninth capacitor is grounded. The other end of the sixth resistor is connected to the control end of the pose sensor. The other ends of the seventh resistor and the eighth resistor are connected to the data end of the pose sensor.

[0105] From the above description, the ninth capacitor, the sixth resistor, the seventh resistor and the eighth resistor are used to ensure that the power supply voltage stably supplies power to the pose sensor, thereby ensuring normal operation of the pose sensor.

[0106] Embodiments of the utility model provide a radar liquid level meter can be applicable to complex environment realizes liquid level monitoring function, the following through specific embodiment to explain:

[0107] Please refer to Figures 1 to 13 , the utility model discloses an embodiment one is:

[0108] As Figure 1 Indicated, a radar liquid level meter, including shell 1 and lens 2, shell 1 is provided with openwork window, and lens 2 is set to openwork window place. Shell 1 is provided with main control unit 11, pose monitoring module 12, wireless communication module 13 and radar measurement module 14. Among them, shell 1 is also provided with horizontal bubble instrument, so as to facilitate manual observation radar liquid level meter's pose state in installation process.

[0109] As Figure 2 Indicated, specifically, the first data acquisition end of main control unit 11 is connected with pose monitoring module 12;The first communication end of main control unit 11 is connected with wireless communication module 13;The second data acquisition end of main control unit 11 is connected with radar measurement module 14, and radar measurement module 14 is located at the focal point of lens 2. Pose monitoring module 12 is used to collect the real-time pose data of equipment, and wireless communication module 13 is used to communicate with cloud server, and radar measurement module 14 is used to collect the distance data between radar wave from transmitting antenna to liquid surface and reflecting back to receiving antenna, and main control unit 11 is used to analyze and process the collected data.

[0110] Among them, after equipment starts, main control unit 11 initializes hardware system, and starts continuous collection radar data by radar measurement module 14. Every 40 groups of data are collected by radar measurement module 14, and main control unit 11 judges the number of effective data, when the number of effective data is greater than or equal to 5, then main control unit 11 carries out filtering processing to data, when the number of effective data is less than 5, then 40 groups of data are collected again. After main control unit 11 analyzes all effective data, the maximum distance value and the minimum distance value of this collection are obtained, main control unit 11 selects the middle 5 data of effective data, calculates average value, and obtains the final distance data.

[0111] In an alternative embodiment, as Figure 3As shown, the posture monitoring module 12 includes a posture sensor U6, a ninth capacitor C45, a sixth resistor R48, a seventh resistor R49 and an eighth resistor R50. Among them, the data end of the posture sensor U6 includes pins 4 and 6, that is, SCL / SPC and SDA / SDI / SDO; the power supply end of the posture sensor U6 includes pin 1, that is, VDD_IO; and the control end of the posture sensor U6 includes pins 7 and 8, that is, SDO / SA0 and CS. The first data acquisition end of the master control unit 11 includes QXSCL pin and QXSDA pin. The pins 4 and 6 of the posture sensor U6 are connected to the QXSCL pin and the QXSDA pin of the master control unit 11, and the pin 1 of the posture sensor U6 is connected to one end of the ninth capacitor C45, the sixth resistor R48, the seventh resistor R47 and the eighth resistor R50, respectively; the pin 1 of the posture sensor U6 is also used to connect the power supply voltage 3.3V, the other end of the ninth capacitor C45 is grounded, the other end of the sixth resistor R48 is connected to the pins 7 and 8 of the posture sensor U6, and the other ends of the seventh resistor R49 and the eighth resistor R50 are connected to the pins 4 and 6 of the posture sensor U6.

[0112] Among them, the master control unit 11 acquires the posture data of the device through the posture monitoring module 12 at an acquisition frequency of once every 60 seconds, and when it is monitored that the inclination angle of the device is too large, the master control unit 11 will actively report the abnormal state to the cloud server through the wireless communication module 13.

[0113] Specifically, as shown in Figure 4 The housing 1 also has a power management module 15 arranged therein, and the power management module 15 includes a lithium battery pack 151, a power input circuit 152 and a control unit 153. The input end of the power input circuit 152 is used to connect an external power supply, and the output ends of the lithium battery pack 151 and the power input circuit 152 are both connected to the input end of the control unit 153; and the output end of the control unit 153 is connected to the power supply end of the master control unit 11. The power management module 15 is used to supply power to the device.

[0114] In an alternative embodiment, as shown in Figure 5 and Figure 6As shown, the control unit 153 comprises a power management chip U1, and the power input circuit 152 comprises a voltage conversion chip U2, a first capacitor C3, a second capacitor C4, a third capacitor C5, a fourth capacitor C1, a fifth capacitor C2, a sixth capacitor C6, a first resistor R3, a second resistor R2, a third resistor R5 and a first inductor L1. Among them, the power supply input end of the power management chip U1 comprises pin 4, that is, VCC; the power supply output end of the power management chip U1 comprises pin 5, that is, BAT; the control end of the power management chip U1 comprises pin 6, pin 7 and pin 8, that is, STDBY#, CHRG# and CE. The input end of the voltage conversion chip U2 comprises pin 5, that is, IN; the enable end of the voltage conversion chip U2 comprises pin 8, that is, EN; the output end of the voltage conversion chip U2 comprises pin 1, that is, FB; the feedback end of the voltage conversion chip U2 comprises pin 6 and pin 7, that is, LX and BS. The power supply end of the master control unit 11 comprises the VBAT pin. One end of the first capacitor C3, the second capacitor C4, the third capacitor C5 and the first resistor R3 is used to connect an external power supply, and the other end of the first capacitor C3, the second capacitor C4 and the third capacitor C5 is grounded; the input end of the voltage conversion chip U2 is used to connect an external power supply, pin 8 of the voltage conversion chip U2 is connected to the other end of the first resistor R3, pin 1 of the voltage conversion chip U2 is respectively connected to one end of the second resistor R2, one end of the third resistor R5 and the power supply input end (5V) of the power management chip U1; the other end of the second resistor R2 is respectively connected to one end of the fourth capacitor C1, one end of the fifth capacitor C2 and one end of the first inductor L1, the other end of the fourth capacitor C1 and the other end of the fifth capacitor C2 are grounded, one end of the first inductor L1 is connected to one end of the sixth capacitor C6, the other end of the sixth capacitor C6 is connected to pin 6 and pin 7 of the voltage conversion chip U2, and the other end of the third resistor R5 is grounded; pin 5 of the power management chip U1 is respectively connected to the lithium battery pack P1 and the VBAT pin of the master control unit 11, and pin 6, pin 7 and pin 8 of the power management chip U1 are respectively connected to the STDBY pin, the CHRG pin and the BATCTL pin of the master control unit 11.

[0115] It should be noted that when the device accesses the external power supply, the control unit 153 can charge the lithium battery pack 151 and supply power to the master control unit 11 based on the external power supply of the power input circuit 152, and when the device does not access the external power supply, the control unit 152 can discharge the lithium battery pack 151 to supply power to the master control unit 11. The control unit 152 charges the lithium battery pack 151 when the internal temperature of the device is less than 50℃, and stops charging when the internal temperature exceeds 50℃.

[0116] As Figure 1 and Figure 7As shown, specifically, the waterproof joint 101 is further arranged on the shell 1. The rain collection module 16 is further arranged in the shell 1 close to the waterproof joint 101, and the rain collection module 16 includes a rain collection circuit 161. The input end of the rain collection circuit 161 is used to connect the pulse rain bucket through the waterproof joint 101, and the output end of the rain collection circuit 161 is connected to the third data collection end of the main control unit 11. The rain collection module 16 is used to collect the rain data around the device.

[0117] In an optional implementation, as shown in Figure 8 The rain collection circuit 161 includes an interface module P7, a photocoupler U6, a fuse F4, a fourth resistor R48, a fifth resistor R49, a seventh capacitor C45 and an eighth capacitor C46. The third data collection end of the main control unit 11 includes a RAIN pin. The input end of the interface module P7 is used to connect the pulse rain bucket through the waterproof joint 101, and the output end of the interface module P7 is connected to one end of the fuse F4. The other end of the fuse F4 is respectively connected to the fourth resistor R48, the fifth resistor R49 and one end of the seventh capacitor C45. The other end of the fourth resistor R48 is respectively connected to the other end of the fifth resistor R49, one end of the eighth capacitor C46 and the cathode input end C of the photocoupler U6. The other ends of the seventh capacitor C45 and the eighth capacitor C46 are grounded. The anode input end A of the photocoupler U6 is used to connect the power supply voltage BATT, and the collector output end COL of the photocoupler U6 is respectively connected to the RAIN pin of the main control unit 11. The emission output end EM of the photocoupler U6 is grounded.

[0118] As shown in Figure 7 Specifically, the Bluetooth debugging module 17 is further arranged in the shell 1. The second communication end of the main control unit 11 is connected to the Bluetooth debugging module 17; and the Bluetooth debugging module 17 is used to configure the device parameters according to the user debugging instructions.

[0119] In an optional implementation, as shown in Figure 9 The data end of the Bluetooth debugging module 17 includes a CS# pin, a DO pin, a CLK pin and a DI pin. The second communication end of the main control unit 11 includes a SPI1NSS pin, a SPI1MISO pin, a SPI1SCK pin and a SPI1MOSI pin. The data end of the Bluetooth debugging module 17 is connected to the second communication end of the main control unit 11.

[0120] Specifically, the wired communication module 18 is further arranged in the shell 1. The third communication end of the main control unit 11 is connected to the wired communication module 18; and the wired communication module 18 is used to communicate with the host computer or access other sensors.

[0121] In an optional implementation, as shown in Figure 10As shown, the wired communication module 18 is an RS485 communication module, which includes an RS485 communication chip U3, a resistor R22, a resistor R24, a resistor R26, a resistor R27, a diode D4, a diode D5, a fuse F1 and a fuse F2. The RO pin, the DI pin, the RE# pin and the DE pin of the RS485 communication chip U3 are connected to the third communication end U1-RX, U1-TX and RTS485 of the master control unit 11. The A pin of the RS485 communication chip U3 is connected to one end of the resistor R26 and the resistor R27, respectively, the other end of the resistor R27 is connected to a power supply voltage, the other end of the resistor R26 is connected to the negative electrode of the diode D5 and one end of the fuse F2, respectively, the positive electrode of the diode D5 is grounded, and the other end of the fuse F2 is connected to the signal line A of the RS485 communication. The B pin of the RS485 communication chip U3 is connected to one end of the resistor R22 and the resistor R24, respectively, the other end of the resistor R22 is grounded, the other end of the resistor R24 is connected to the negative electrode of the diode D4 and one end of the fuse F1, respectively, the positive electrode of the diode D4 is grounded, and the other end of the fuse F1 is connected to the signal line B of the RS485 communication.

[0122] Specifically, the wireless communication module 13 includes an LTE communication unit 131 and a LoRa communication unit 132. The first communication end of the master control unit 11 is connected to the LTE communication unit 131 and the LoRa communication unit 132, respectively.

[0123] In an alternative embodiment, the connection mode of the LTE communication unit 131 and the master control unit 11 is as shown in Figure 11 , wherein the first communication end of the master control unit 11 includes a SIMDAT pin, a SIMRST pin, a SIMCLK pin, a SIMVDD pin and a DCERST pin. The connection mode of the LoRa communication unit 132 and the master control unit 11 is as shown in Figure 12 , wherein the first communication end of the master control unit 11 further includes a LU1-RX pin and a LU1-TX pin.

[0124] Specifically, the shell 1 further has a memory module 19 arranged therein. The fourth communication end of the master control unit 11 is connected to the memory module 19; the memory module 19 is used to store acquisition data, device parameters and running data.

[0125] In an alternative embodiment, the memory module 19 is a flash memory module, and the connection mode of the memory module 19 and the master control unit 11 is as shown in Figure 13 , wherein the fourth communication end of the master control unit 11 includes an LRST pin, an LRXINT pin, an SPI2NSS pin, an SPI2MOSI pin, an SPI2MISO pin, an SPI2SCL pin and an LBUSY pin.

[0126] In summary, the radar liquid level meter provided by the utility model simplifies equipment installation through integration of multiple modules and realizes efficient data acquisition. The pose monitoring module ensures measurement accuracy, and the wireless communication module facilitates remote monitoring and management. The addition of the power management module improves the reliability of power supply and prolongs battery life. The rainfall collection module expands the application scenario and realizes accurate collection and monitoring of rainfall. The Bluetooth debugging module facilitates on-site debugging and configuration and reduces the difficulty of debugging. The wired communication module improves the compatibility and expandability of the equipment, and the wireless communication module provides flexible networking options. The memory module facilitates historical data backtracking and analysis. At the same time, the fine power management and rainfall collection circuit design improve energy utilization efficiency, measurement accuracy and data reliability. The utility model improves the intelligence and flexibility of the radar liquid level meter and meets the application requirements of the radar liquid level meter in complex environments.

[0127] The above is only an embodiment of the utility model, and does not limit the patent range of the utility model, and any equivalent transformation, direct or indirect application in related technical fields using the contents of the utility model specification and drawings are also included in the patent protection range of the utility model.

Claims

1. A radar level gauge, characterized in that The application relates to a device for monitoring liquid level, which comprises a shell and a lens, the shell is provided with a hollow window, the lens is arranged at the hollow window, and a main control unit, a position monitoring module, a wireless communication module and a radar measurement module are arranged in the shell. A first data acquisition end of the main control unit is connected with the position monitoring module. A first communication end of the main control unit is connected with the wireless communication module. A second data acquisition end of the main control unit is connected with the radar measurement module, and the radar measurement module is located at a focal point of the lens. The position monitoring module is used for collecting real-time position data of the device, the wireless communication module is used for communicating with a cloud server, the radar measurement module is used for collecting distance data of radar waves from a transmitting antenna to a liquid surface and back to a receiving antenna, and the main control unit is used for analyzing and processing the collected data.

2. A radar level gauge according to claim 1, characterized in that A power management module is further arranged in the shell, the power management module comprises a lithium battery pack, a power input circuit and a control unit. An input end of the power input circuit is used for connecting an external power source, and input ends of the lithium battery pack and the power input circuit are connected with an input end of the control unit. An output end of the control unit is connected with a power supply end of the main control unit. The power management module is used for supplying power to the device.

3. A radar level gauge according to claim 1, characterized in that A waterproof joint is further arranged on the shell, a rainfall collection module is further arranged in the shell and close to the waterproof joint, and the rainfall collection module comprises a rainfall collection circuit. An input end of the rainfall collection circuit is used for connecting a pulse type rainfall bucket through the waterproof joint, and an output end of the rainfall collection circuit is connected with a third data acquisition end of the main control unit. The rainfall collection module is used for collecting rainfall data around the device.

4. A radar level gauge according to claim 1, characterized in that A Bluetooth debugging module is further arranged in the shell. A second communication end of the main control unit is connected with the Bluetooth debugging module. The Bluetooth debugging module is used for configuring device parameters according to user debugging instructions.

5. A radar level gauge according to claim 1, characterized in that A wired communication module is further arranged in the shell. A third communication end of the main control unit is connected with the wired communication module. The wired communication module is used for communicating with an upper computer or accessing other sensors.

6. A radar level gauge according to claim 1, characterized in that The wireless communication module comprises an LTE communication unit and a LoRa communication unit. The first communication end of the main control unit is connected with the LTE communication unit and the LoRa communication unit respectively.

7. A radar level gauge according to claim 1, characterized in that A memory module is further arranged in the shell. A fourth communication end of the main control unit is connected with the memory module. The memory module is used for storing collected data, device parameters and running data.

8. A radar level gauge according to claim 2, characterized in that The control unit comprises a power management chip. The power input circuit comprises a voltage conversion chip, a first capacitor, a second capacitor, a third capacitor, a fourth capacitor, a fifth capacitor, a sixth capacitor, a first resistor, a second resistor, a third resistor and a first inductor. One end of the first capacitor, the second capacitor, the third capacitor and the first resistor is used for connecting an external power source, and the other end of the first capacitor, the second capacitor and the third capacitor is grounded. The input end of the voltage conversion chip is used for connecting the external power supply, the enable end of the voltage conversion chip is connected with the other end of the first resistor, and the output end of the voltage conversion chip is connected with one end of the second resistor, one end of the third resistor and the power supply input end of the power management chip respectively; The other end of the second resistor is connected with one end of the fourth capacitor, one end of the fifth capacitor and one end of the first inductor respectively, the other ends of the fourth capacitor and the fifth capacitor are grounded, one end of the sixth capacitor is connected with the other end of the first inductor, the other end of the sixth capacitor is connected with the feedback end of the voltage conversion chip, and the other end of the third resistor is grounded; The power supply output end of the power management chip is connected with the power supply end of the lithium battery group and the main control unit respectively, and the control end of the power management chip is connected with the main control unit.

9. A radar level gauge according to claim 3, characterized in that The rain collection circuit comprises an interface module, a photoelectric coupler, a fuse, a fourth resistor, a fifth resistor, a seventh capacitor and an eighth capacitor; The input end of the interface module is used for connecting a pulse rain bucket through the waterproof joint, and the output end of the interface module is connected with one end of the fuse; the other end of the fuse is connected with the fourth resistor, the fifth resistor and one end of the seventh capacitor respectively; The other end of the fourth resistor is connected with the other end of the fifth resistor, one end of the eighth capacitor and the cathode input end of the photoelectric coupler respectively, and the other ends of the seventh capacitor and the eighth capacitor are grounded; The anode input end of the photoelectric coupler is used for connecting a power supply voltage, the collector output end of the photoelectric coupler is connected with the third data acquisition end of the main control unit respectively, and the emitter output end of the photoelectric coupler is grounded.

10. A radar level gauge according to claim 1, characterized in that The posture monitoring module comprises a posture sensor, a ninth capacitor, a sixth resistor, a seventh resistor and an eighth resistor; The data end of the posture sensor is connected with the first data acquisition end of the main control unit, and the power supply end of the posture sensor is connected with one end of the ninth capacitor, one end of the sixth resistor, one end of the seventh resistor and one end of the eighth resistor respectively; The power supply end of the posture sensor is also used for connecting a power supply voltage, the other end of the ninth capacitor is grounded, the other end of the sixth resistor is connected with the control end of the posture sensor, and the other ends of the seventh resistor and the eighth resistor are connected with the data end of the posture sensor.

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