Environment monitor

Abstract

The utility model discloses an environment monitor comprising a housing, and a main circuit board, a sensor, a control display module and a power supply module which are fixedly arranged on the housing. The main circuit board comprises an MCU control module, and an AD acquisition module, a Flash data storage module, an RTC clock module and a communication module which are electrically connected with the MCU control module through signals; the sensor comprises a temperature and humidity sensor and a pressure sensor; the device is characterized in that the housing comprises a sensor loading part and a mainboard loading part; a main circuit board, a control display module and a power supply module are fixedly mounted on the mainboard loading part; the overall appearance of the sensor loading part is in a circular tube shape, one axial end of the circular tube shape is an installation test end which is provided with external threads on the outer side and is used for threaded connection, and the other axial end is a connecting end which is fixedly connected with the mainboard loading part; the axial middle position of the circular tube is sealed and is fixedly provided with a sensor mounting plate; and a sensor is fixedly arranged on the plate surface, facing the mounting test end, of the sensor mounting plate.

Description

Technical Field

[0001] The utility model belongs to the field of instruments for monitoring environmental parameters in a closed space, and in particular relates to an environmental monitoring instrument. Background Art

[0002] For storage boxes that store important items, it is often necessary to monitor the environmental parameters (such as temperature, humidity, and air pressure) inside the box to avoid changes in the environment inside the box that may affect the safety and reliability of the storage of important items.

[0003] In the prior art, the patent with application number 201810975077.9 discloses "a dehumidification intelligent environmental tester for a sealed box", and its technical solution includes a shell, a main control board circuit module, a measuring dehumidification device, a power module, a built-in antenna, a key input module and a display module; the shell is wrapped on the sealed box, and an O-ring is arranged between the shell and the sealed box to seal the two, a measuring dehumidification device is installed on the inner side of the rear of the shell, a power module and a main control board circuit module are arranged in the middle of the shell, a protective plate and a stainless steel plate are arranged at the front of the shell, and a key input module and a display module are embedded in the protective plate.

[0004] In the above technical solution, a plug structure (see its Figure 1 The upper convex structure at the top of the middle part has an O-ring installed on its outer periphery to be inserted into the corresponding mounting hole on the sealed box body to be monitored; the plug structure is axially penetrated, so that the inside of the shell can be connected with the inside of the sealed box, so that the temperature and humidity sensor and pressure sensor installed in the shell can be detected.

[0005] However, the above technical solutions still have the following shortcomings:

[0006] 1. The instrument is installed on a sealed box by plug-in connection. The reliability of the plug-in connection is poor and it is easy to fall off or shift due to bumps during transportation, resulting in instrument measurement failure and external air entering the sealed box, affecting reliable storage.

[0007] 2. The structure of the measuring dehumidification device is relatively complex, and the motor in it needs to be driven to drive the dehumidification wheel. This will have the following disadvantages: a. The instrument will vibrate, which will affect the connection quality with the sealed box over time; b. The energy consumption is greater, resulting in a shorter battery life of the entire instrument; c. The structure is complex and the cost is higher.

[0008] Based on this, the applicant considered designing an environmental monitoring instrument that can be installed and used more reliably. Summary of the invention

[0009] In view of the above-mentioned deficiencies in the prior art, the technical problem to be solved by the present invention is: how to provide an environmental monitoring instrument that can be installed and used more reliably.

[0010] In order to solve the above technical problems, the utility model adopts the following technical solutions:

[0011] An environmental monitor comprises a housing and a main circuit board, a sensor, a control and display module and a power module fixedly arranged on the housing; the power module is used to supply power to the main circuit board, the sensor and the control and display module, and the sensor and the control and display module are electrically connected to corresponding interfaces on the main circuit board respectively;

[0012] The main circuit board includes an MCU control module and an AD acquisition module, a Flash data storage module, an RTC clock module and a communication module which are electrically connected to the MCU control module signals;

[0013] The sensor includes a temperature and humidity sensor and a pressure sensor; the characteristics are:

[0014] The housing includes a sensor loading portion and a mainboard loading portion;

[0015] The main circuit board, the control and display module and the power supply module are fixedly mounted on the mainboard loading part;

[0016] The overall shape of the sensor loading part is a round tube, and one axial end of the round tube is an installation test end with an external thread on the outside and used for threaded connection, and the other axial end is a connection end fixedly connected to the mainboard loading part;

[0017] A sensor mounting plate is sealed and fixedly mounted at the axial middle position of the circular tube, and the sensor is fixedly mounted on the plate surface of the sensor mounting plate facing the mounting test end.

[0018] Compared with the prior art, the advantages of the environmental monitoring instrument of the utility model are:

[0019] 1. Easy, fast and reliable installation

[0020] The environmental tester as a whole is connected to the threaded hole on the seal to be tested (sealed packaging box or sealed packaging box, etc.) through the external thread of the installation test end of the sensor loading part on the outer shell. The threaded connection has the advantages of simple, fast and reliable connection and installation, so it can effectively avoid connection failure or displacement caused by bumps during transportation, and prevent external air from entering the seal to be tested. At the same time, it can also achieve reliable monitoring of the air environment inside the test piece.

[0021] 2. The sensor loading part can play a sealing and barrier role

[0022] The inner axial middle position of the sensor loading part is sealed, which can effectively block the outflow of gas in the seal to be tested and the entry of external air into the seal to be tested, so that the environmental monitor can accurately monitor the seal to be tested. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 The three-dimensional structure diagram of the environmental monitoring instrument of the utility model is shown in FIG.

[0024] Figure 2 This is a front view of the environmental monitoring instrument of the utility model

[0025] Figure 3 for Figure 2 AA line section view

[0026] Figure 4 The three-dimensional structure diagram of the environmental monitoring instrument of the utility model is shown in FIG.

[0027] Figure 5 This is a cross-sectional view of the environmental monitoring instrument of the utility model

[0028] Figure 6 This is the principle diagram of the environmental monitoring instrument of this utility model.

[0029] The markings in the figure are:

[0030] Housing: 1 sensor loading part (101 installation test end, 102 connection end, 103 step column, 104 connection boss), 2 mainboard loading part (201 cover plate, 202 box body structure)

[0031] 3 Main circuit board

[0032] 4Sensor mounting plate

[0033] 5 sensors (501 temperature and humidity, 502 pressure sensor)

[0034] 6 buttons

[0035] 7 Indicator Lights

[0036] 8 Display

[0037] 9Data reading interface

[0038] 10 battery mounting plate

[0039] 11Battery Pack

[0040] 12 Hoop

[0041] 13 Hexagonal stud

[0042] 14MCU control module

[0043] 15 Communication module (for example: 485 preset communication interface)

[0044] 16HL2492 power chip

[0045] 17AD acquisition module

[0046] 18Flash data storage module

[0047] 19 RTC clock module

[0048] 20 logic processing modules DETAILED DESCRIPTION

[0049] The utility model is further described in detail below in conjunction with the accompanying drawings.

[0050] The first embodiment, such as Figures 1 to 4 As shown:

[0051] An environmental monitor comprises a housing and a main circuit board, a sensor, a control and display module and a power module fixedly arranged on the housing; the power module is used to supply power to the main circuit board, the sensor and the control and display module, and the sensor and the control and display module are electrically connected to corresponding interfaces on the main circuit board respectively;

[0052] The main circuit board includes an MCU control module and an AD acquisition module, a Flash data storage module, an RTC clock module and a communication module which are electrically connected to the MCU control module signals;

[0053] The sensor includes a temperature and humidity sensor and a pressure sensor; the characteristics are:

[0054] The housing includes a sensor loading portion and a mainboard loading portion;

[0055] The main circuit board, the control and display module and the power supply module are fixedly mounted on the mainboard loading part;

[0056] The overall shape of the sensor loading part is a round tube, and one axial end of the round tube is an installation test end with an external thread on the outside and used for threaded connection, and the other axial end is a connection end fixedly connected to the mainboard loading part;

[0057] A sensor mounting plate is sealed and fixedly mounted at the axial middle position of the circular tube, and the sensor is fixedly mounted on the plate surface of the sensor mounting plate facing the mounting test end.

[0058] During implementation, the temperature and humidity sensor adopts an integrated high-precision temperature and humidity sensor, which includes an improved MEMS semiconductor capacitive temperature and humidity sensing element and a standard on-chip temperature sensing element, and the IIC digital output interface is anti-interference.

[0059] During implementation, the pressure sensor adopts a digital pressure sensor, which can output calibrated pressure data through UART serial port communication.

[0060] During implementation, a connecting boss is formed radially inwardly on the inner side of the round tube with the test installation end. The connecting boss and the sensor installation plate are provided with assembly connecting holes opposite to each other, and the sensor installation plate and the connecting boss are fixedly connected by screws.

[0061] In this way, the connecting boss can not only serve as a reinforcing rib to increase the structural strength of the round tube, but can also be used for the installation and connection of the sensor with a mounting plate.

[0062] The outer structure of the mainboard loading part is a box structure with a cover plate, and the cover plate is buckled and connected to the box structure; a connection structure fixedly connected to the sensor loading part is arranged on the circumferential side wall of the box structure.

[0063] The structure of the mainboard loading part makes it easy to quickly snap-fit ​​the cover plate to the box structure, thereby ensuring that the components in the box structure are easier to load, and the cover plate can be quickly snap-fitted to complete the assembly after loading.

[0064] During implementation, the sensor loading parts are detachably fixedly connected to each other via threads.

[0065] The control display module includes a button, an indicator light and a display screen, and the cover plate is correspondingly provided with exposure holes for exposing the pressing operation part of the button, the indicator light and the display surface of the display screen.

[0066] The assembly structure between the control and display module and the cover plate is easier to process and is also convenient for controlling and observing the control and display module.

[0067] During implementation, the button includes a data display switch and a warning reset switch. The cover plate is provided with a data reading interface exposure hole.

[0068] A main circuit board and a power module are fixedly installed in sequence from near to far inside the box body of the mainboard loading part in a direction perpendicular to the cover body and gradually away from the display screen. The power module includes a battery mounting plate, a battery pack and a clamp. The battery pack is fixed to the board surface of the battery mounting plate facing away from the main circuit board by the clamp.

[0069] This not only makes the overall structure of the main circuit board and the power module more compact, but also helps reduce the overall volume of the mainboard loading part; at the same time, the above structure can also be used to isolate the battery pack from the main circuit board, effectively avoiding interference with the main circuit board during the use of the battery pack (heat or electromagnetic generation), thereby improving the reliability of long-term use.

[0070] During implementation, the battery mounting plate and the main circuit board are isolated from each other and fixedly connected by a plurality of hexagonal studs arranged around them.

[0071] During implementation, the battery pack is powered by a battery pack to provide high energy while increasing instantaneous power output. One path is used to power the main controller (MCU_3.3V), and the other path is used to charge the lithium-ion supercapacitor. After each wake-up task, the power supply of the power chip is turned off.

[0072] When implemented, this technical solution includes a logic processing module (logic gate circuit):

[0073] The system status indication is realized by red and blue dual-color LED lights (the red light is always on to indicate "fault status"; the blue light flashes to indicate that the "environmental monitor" is busy; the off status indicates that "the device is normal and is in low-power standby status").

[0074] The blue light is controlled by the MCU to turn on and off, and it will automatically turn off after entering the low power state. The red light is controlled to light up by the MCU, but cannot be turned off by the MCU. The MCU can only output the fault status but cannot perform the fault reset action. It must be turned off by the external warning reset button.

[0075] The control system power-on input signals include RTC clock chip pulse, external data viewing button, and MCU self-control power-on. Any signal pulse trigger can power on the control system and keep it in a locked state, and then power off the control system through a power-off signal.

[0076] During implementation, the 485 interface circuit uses a 485 interface chip. The 485 interface circuit adds a TVS tube protection device (V6 SM712) between the 485_A and 485_B pins to prevent transient spike interference from damaging the circuit.

[0077] During implementation, data storage uses a large-capacity Flash memory and a rolling storage method to store at least 2 years of data.

[0078] During implementation, the RTC clock chip uses a high-precision real-time clock chip with a built-in 32.768kHz digital temperature compensated crystal oscillator and a fixed-period timing interrupt function. It can wake up the system at a fixed period to collect and store environmental data, ensuring that the environmental monitor is in an absolutely low-power state for a long time.

[0079] The second embodiment, such as Figure 5 As shown:

[0080] The difference between this embodiment and the first embodiment is that:

[0081] The sensor loading part is formed by two round tubes connected by threads in its axial direction; and a step hole is formed inside the connection between the two round tubes, and the step surface of the step hole faces the installation test end;

[0082] A sealing step column is provided in the step hole for filling and limiting, and the sensor mounting plate is fixedly mounted on the end surface of the step column facing the mounting test end.

[0083] The structure of the sensor loading part is formed by two round tubes connected by threads at the ends, so it has the advantages of easy processing and production, easy assembly and connection, and easy disassembly and maintenance.

[0084] At the same time, the structure of the sensor loading portion also makes the process of installing the step column and the sensor mounting plate therein simple and quick, which helps to improve the assembly efficiency of the product.

[0085] During implementation, it is preferred that a connector with an external hexagonal corner is disposed on the outer sides of the threaded connection ends of the two round tubes.

[0086] During implementation, the axial rear side of the step column abuts against the step hole for limiting position, and the axial front side abuts against the rear end surface of the round tube with the test end installed for limiting position.

[0087] During implementation, the sensor mounting plate can be embedded and fixed on the end surface of the step column, or can be adhesively fixed on the end surface of the step column.

[0088] During implementation, the step column is made of an elastic material; the elastic material can be made of any one of TPU, rubber or polyurethane.

[0089] The use process of the environmental monitoring system of the above two embodiments is as follows:

[0090] After power-on, the startup source is checked to determine whether it is started by the external switch or the RTC clock chip; enter the system initialization state to determine the Flash write address, whether to replace the new battery, and calculate the current battery working days and other information.

[0091] When the startup source is RTC startup, the temperature, humidity, and pressure values ​​are read periodically, and the average value is calculated to store the environmental data and device status information into Flash, waiting for the RTC super capacitor voltage to be fully charged, or charging for a certain period of time before entering the low power consumption state again.

[0092] When the startup plan is that the external switch is started, the temperature, humidity and pressure values ​​are read periodically and displayed on the display. When the display ends, the average value is calculated and the environmental data and device status information are stored in Flash together, waiting for the RTC super capacitor voltage to be fully charged, or after charging for a certain period of time, it enters the low power consumption state again.

[0093] The above are only preferred implementations of the present invention. It should be pointed out that a number of modifications and improved technical solutions made by those skilled in the art without departing from the technical solution should also be deemed to fall within the scope of protection required by the claims.

Claims

1. An environmental monitor, comprising a housing and a main circuit board, a sensor, a control and display module and a power module fixedly arranged on the housing; the power module is used to supply power to the main circuit board, the sensor and the control and display module, and the sensor and the control and display module are electrically connected to corresponding interfaces on the main circuit board respectively; The main circuit board includes an MCU control module and an AD acquisition module, a Flash data storage module, an RTC clock module and a communication module which are electrically connected to the MCU control module signals; The sensor includes a temperature and humidity sensor and a pressure sensor; the characteristics are: The housing includes a sensor loading portion and a mainboard loading portion; The main circuit board, the control and display module and the power supply module are fixedly mounted on the mainboard loading part; The overall shape of the sensor loading part is a round tube, and one axial end of the round tube is an installation test end with an external thread on the outside and used for threaded connection, and the other axial end is a connection end fixedly connected to the mainboard loading part; A sensor mounting plate is sealed and fixedly mounted at the axial middle position of the circular tube, and the sensor is fixedly mounted on the plate surface of the sensor mounting plate facing the mounting test end.

2. The environmental monitoring device according to claim 1, characterized in that: The sensor loading part is formed by two round tubes connected by threads in its axial direction; and a step hole is formed inside the connection between the two round tubes, and the step surface of the step hole faces the installation test end; A sealing step column is provided in the step hole for filling and limiting, and the sensor mounting plate is fixedly mounted on the end surface of the step column facing the mounting test end.

3. The environmental monitoring instrument according to claim 1 or 2, characterized in that: The outer structure of the mainboard loading part is a box structure with a cover plate, and the cover plate is buckled and connected to the box structure; a connection structure fixedly connected to the sensor loading part is arranged on the circumferential side wall of the box structure.

4. The environmental monitoring device according to claim 3, characterized in that: The control display module includes a button, an indicator light and a display screen, and the cover plate is correspondingly provided with exposure holes for exposing the pressing operation part of the button, the indicator light and the display surface of the display screen.

5. The environmental monitoring device according to claim 4, characterized in that: A main circuit board and a power module are fixedly installed in sequence from near to far inside the box body of the mainboard loading part in a direction perpendicular to the cover body and gradually away from the display screen. The power module includes a battery mounting plate, a battery pack and a clamp. The battery pack is fixed to the board surface of the battery mounting plate facing away from the main circuit board by the clamp.

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