Temperature and humidity acquisition device

Abstract

The utility model discloses a temperature and humidity acquisition device, which comprises a processor, a temperature and humidity sensor and a power supply circuit, and is characterized in that the processor is electrically connected with the temperature and humidity sensor and is used for receiving temperature and humidity information of the temperature and humidity sensor, and the temperature and humidity sensor is used for acquiring temperature and humidity information of an environment where a temperature and humidity detection device is located; the power supply circuit is connected with the processor, the power supply circuit is used for supplying power and is provided with a self-locking circuit, the processor judges whether a power supply signal MCUPWRON is higher than a preset threshold value or not during startup, outputs a high-level MCUPWRLOCK signal to the power supply circuit and marks a startup state when the power supply signal MCUPWRON is higher than the preset threshold value, the self-locking circuit is started, and outputs a low-level MCUPWRLOCK signal to the power supply circuit when the power supply signal MCUPWRON is lower than the preset threshold value. When the self-locking circuit is closed and runs, the MCUPWRON is lower than a preset value, the self-locking circuit keeps starting, the processor outputs an alarm signal, the power supply circuit has a self-checking function, when the electric quantity is too low, alarm information is automatically sent, an alarm is automatically triggered based on preset conditions, and related personnel are timely notified to handle abnormal conditions.

Description

TECHNICAL FIELD

[0001] The present application belongs to the field of automatic instrument and control system, and particularly relates to environmental monitoring technology, and especially relates to a high-precision temperature and humidity monitoring system applied to cold chain management, warehouse logistics, food and pharmaceutical industries. BACKGROUND

[0002] The design and development of the present application are derived from the demand for strict control of the storage conditions of goods in the cold chain environment, especially in the storage and transportation links of sensitive materials such as food, medicine and biological products, the change of temperature and humidity directly affects the product quality and safety. The environmental monitoring system equipment of the cold chain environment mainly uses modern sensing technology, wireless communication technology and data processing algorithm to realize real-time and accurate collection and remote monitoring of temperature and humidity parameters in a closed or semi-closed space, and mostly needs temperature and humidity collection devices.

[0003] Traditional temperature and humidity collection devices mostly rely on manual inspection and manual recording, and have problems such as low efficiency, high error rate and slow reaction. With the progress of science and technology, modern cold storage temperature and humidity collection devices have emerged, which integrate a number of key technologies behind them, aiming to solve the limitations of traditional methods and provide more accurate and efficient monitoring solutions, so modern cold storage temperature and humidity collection devices consume more power and are prone to low power situations that are not discovered in time by the staff, resulting in that the cold storage storage environment does not meet the conditions.

[0004] Therefore, there is an urgent need for a cold storage temperature and humidity collection device that can check the power state of the cold storage in real time and output alarm information when the device power is detected to be insufficient. SUMMARY

[0005] To solve the above problems, the utility model provides a temperature and humidity collection device, its power supply circuit has self-checking function, when the electric quantity is too low, the alarm information is sent automatically, the alarm is triggered automatically based on the preset condition, the related personnel is informed in time to handle the abnormal situation, and the loss is prevented.

[0006] The technical scheme adopted by the utility model is:

[0007] Provided is a temperature and humidity acquisition device, the temperature and humidity detection device includes a processor, a temperature and humidity sensor and a power supply circuit, the processor is electrically connected to the temperature and humidity sensor, and is used to receive the temperature and humidity information of the temperature and humidity sensor, the temperature and humidity sensor is used to collect the temperature and humidity information of the environment where the temperature and humidity detection device is located, the power supply circuit is connected to the processor, the power supply circuit is used to supply power and has a self-locking circuit, when the power is turned on, the processor determines whether the power supply signal MCU_PWRON is higher than a preset threshold, when it is higher than the preset threshold, it outputs a high-level MCU_PWR_LOCK signal to the power supply circuit and marks the power-on state, the self-locking circuit is started, and when it is lower ... The power circuit outputs a low-level MCU_PWR_LOCK signal, and the self-locking circuit is turned off. During operation, the processor determines whether the power signal MCU_PWRON maintains a preset threshold. If it is lower than the preset threshold, the processor outputs an alarm signal. When shutting down, the processor determines whether the power signal MCU_PWRON is higher than the preset threshold. If it is higher than the preset threshold, the processor outputs a low-level MCU_PWR_LOCK signal to the power circuit and marks the shutdown state, and the self-locking circuit is turned off. If it is lower than the preset threshold, the processor outputs a high-level MCU_PWR_LOCK signal to the power circuit, the self-locking circuit remains started, and the processor outputs an alarm signal.

[0008] Furthermore, the power supply circuit includes a button K4, resistors R14, R15, R16, R23, R24, R25, R32, capacitors C18, C19, transistors Q1, Q2, Q3, field effect transistors FET1 and FET2;

[0009] The one end of the key K4 is connected with the power supply, the other end is connected with the one end of the resistor R14 and the one end of the resistor R15, the other end of the resistor R14 is connected with the one end of the resistor R23 and the base of the transistor Q1, the other end of the resistor R23 is connected with the ground and the one end of the capacitor C18, the other end of the capacitor C18 is connected with the base of the transistor Q1, the other end of the resistor R15 is connected with the one end of the resistor R25 and the base of the transistor Q2, the other end of the resistor R25 is connected with the ground and the one end of the capacitor C19, the other end of the capacitor C19 is connected with the base of the transistor Q2, the collector of the transistor Q1 is connected with the one end of the capacitor C18, the emitter of the transistor Q1 is connected with the gate of the field effect transistor FET1 and the one end of the resistor R31, the other end of the resistor R31 is connected with the power supply, the drain of the field effect transistor FET1 is connected with the power supply, the source of the field effect transistor FET1 is connected with the one end of the resistor R24, the one end of the resistor R24 is connected with the pin of the processor for outputting the MCU_PWRON signal, the other end of the emitter resistor R24 is connected with the ground, the collector of the transistor Q2 is connected with the one end of the capacitor C19, the emitter of the transistor Q2 is connected with the gate of the field effect transistor FET2, the one end of the resistor R32 and the emitter of the transistor Q3, the other end of the resistor R32 is connected with the power supply, the drain of the field effect transistor FET2 is connected with the power supply and the other end of the resistor R32, the source is connected with the power supply, the base of the transistor Q3 is connected with the one end of the resistor R26 and the one end of the resistor R16, the other end of the resistor R26 is connected with the ground and the collector of the transistor Q3, the other end of the resistor R16 is connected with the pin of the processor for outputting the MCU_PWR_LOCK signal.

[0010] Further, the processor adopts an STM32G070CBT6 single-chip microcomputer.

[0011] Further, the communication module adopts an LORA communication module.

[0012] Further, the three keys and the liquid crystal display module are further included, the three keys are displayed on the liquid crystal display module, and the three keys are respectively a power key, a start / stop key and a record clearing key.

[0013] The utility model discloses beneficial effects:

[0014] The power supply circuit of the temperature and humidity acquisition device has a self-checking function, can automatically send an alarm information when the power is too low, automatically trigger an alarm based on a preset condition, timely inform relevant personnel to handle abnormal conditions and prevent losses. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 The functional block diagram of the utility model embodiment 1

[0016] Figure 2 The MCU principle diagram of the utility model embodiment 1.

[0017] Figure 3 The communication module schematic diagram of the embodiment 1 of the utility model.

[0018] Figure 4 The power supply circuit diagram of the embodiment 1 of the utility model.

[0019] Figure 5 The device shell diagram of the temperature and humidity acquisition device of the embodiment 2 of the utility model.

[0020] Wherein, 1 is the charging port, 2 is the interface for connecting the temperature and humidity sensor, 3 is the liquid crystal display module. DETAILED DESCRIPTION

[0021] In order to make the purpose, technical scheme and advantage of the present application more clear, the technical scheme of the present application will be described clearly and completely below in combination with the drawings and a preferred embodiment.

[0022] Embodiment 1

[0023] The embodiment provides a temperature and humidity acquisition device, referring to Figure 1 The temperature and humidity acquisition device includes a processor MCU, a temperature and humidity sensor, a power supply circuit, a battery, a charging circuit, a liquid crystal display module, a communication module, an EPROM, a FLASH and three keys, and the three keys are respectively a power supply key, a start / stop key and a record clearing key.

[0024] The processor is electrically connected with the temperature and humidity sensor, is used for receiving temperature and humidity information of the temperature and humidity sensor, the temperature and humidity sensor is used for collecting temperature and humidity information of an environment where the temperature and humidity detection device is located, a power supply circuit is connected with the processor, and the power supply circuit is used for power supply and has a self-locking circuit; when starting, the processor judges whether the power supply signal MCU_PWRON is higher than a preset threshold value, outputs a high-level MCU_PWR_LOCK signal to the power supply circuit when being higher than the preset threshold value, and marks a starting state, the self-locking circuit is started, and outputs a low-level MCU_PWR_LOCK signal to the power supply circuit when being lower than the preset threshold value, and the self-locking circuit is closed; in a running process, the processor judges whether the power supply signal MCU_PWRON remains the preset threshold value, and outputs an alarm signal when being lower than the preset threshold value; when shutting down, the processor judges whether the power supply signal MCU_PWRON is higher than the preset threshold value, outputs a low-level MCU_PWR_LOCK signal to the power supply circuit when being higher than the preset threshold value, and marks a shutdown state, the self-locking circuit is closed, and outputs a high-level MCU_PWR_LOCK signal to the power supply circuit when being lower than the preset threshold value, the self-locking circuit is maintained in starting, and the processor outputs an alarm signal; a liquid crystal display is used for display, the temperature and humidity sensor specifically adopts an SHT30 sensor, a charging circuit is connected with a battery, the battery is connected with the power supply circuit, a communication module is connected with the processor and is used for realizing communication with an external device, an EPROM and a FLASH are connected with the processor, the EPROM is used for parameter setting, and the FLASH is used for data saving, the battery specifically adopts a 103440 lithium battery with a capacity of 1200mAh, is chargeable, and can continuously work for more than one week.

[0025] Reference Figure 2 The processor of the embodiment adopts an STM32G070CBT6 single-chip microcomputer, a pin 1 of the processor is used for MCU_nSTDBY and is used for MCU standby control, a pin 2 is used as MCU_nCHG and is used for charging, a pin 3 is used as an output MCU_PWR_LOCK signal, pins 4-6 are used for connecting a 3.3V power supply, a pin 7 is used for grounding, a pin 8 is used as an OSCIN pin and is used for receiving an external clock signal, a pin 9 is used as an OSCOUT pin and is used for outputting a clock signal, a pin 10 is used as MCU_nRST and is used for resetting, a pin 11 is used as MCU_ATT_ADC and is used for reading a voltage level of a battery, pins 12-15 are used for SPI communication, pins 16-17 are used for communication between the EPROM and an external device, pins 29, 31 and 32 are used for connecting a communication module, a pin 48 is used as an output MCU_PWRON signal, pins 45-47 are used for connecting a liquid crystal display module, a pin 47 is used as MCU_LCD_nRST, a pin 46 is used as MCU_LCD_SDA, a pin 45 is used as MCU_LCD_SCL, a pin 38 is used for connecting a red indicator lamp, and a pin 37 is used for connecting a green indicator lamp, the red indicator lamp indicates that charging is in progress, and the green indicator lamp indicates that charging is completed.

[0026] Reference Figure 3 The communication module of the application adopts a LORA communication module, pin 1VCC is connected with a 3.3V power supply, pin 2 is grounded, pins 3-5 are connected with pins 29, 31 and 32 of the MCU, pin 8 and pin 10 are grounded, and pin 9 is connected with a transient voltage suppressor TVS1 and an external antenna.

[0027] Reference Figure 4 The power supply circuit of the application includes a button K4, resistors R14, R15, R16, R23, R24, R25, R32, capacitors C18, C19, transistors Q1, Q2, Q3, field effect transistors FET1 and FET2.

[0028] One end of the button K4 is connected with a power supply, and the other end is connected with one end of the resistor R14 and one end of the resistor R15. The other end of the resistor R14 is connected with one end of the resistor R23 and the base of the transistor Q1. The other end of the resistor R23 is grounded and connected with one end of the capacitor C18. The other end of the capacitor C18 is connected with the base of the transistor Q1. The other end of the resistor R15 is connected with one end of the resistor R25 and the base of the transistor Q2. The other end of the resistor R25 is grounded and connected with one end of the capacitor C19. The other end of the capacitor C19 is connected with the base of the transistor Q2. The collector of the transistor Q1 is connected with one end of the capacitor C18. The emitter of the transistor Q1 is connected with the gate of the field effect transistor FET1 and one end of the resistor R31. The other end of the resistor R31 is connected with a power supply. The drain of the field effect transistor FET1 is connected with a power supply. The source of the field effect transistor FET1 is connected with one end of the resistor R24. One end of the resistor R24 is used to connect with a pin of the processor outputting the MCU_PWRON signal. The other end of the emitter resistor R24 is grounded. The collector of the transistor Q2 is connected with one end of the capacitor C19. The emitter of the transistor Q2 is connected with the gate of the field effect transistor FET2, one end of the resistor R32 and the emitter of the transistor Q3. The other end of the resistor R32 is connected with a power supply. The drain of the field effect transistor FET2 is connected with a power supply and the other end of the resistor R32. The source is connected with a power supply. The base of the transistor Q3 is connected with one end of the resistor R26 and one end of the resistor R16. The other end of the resistor R26 is grounded and connected with the collector of the transistor Q3. The other end of the resistor R16 is used to connect with a pin of the processor outputting the MCU_PWR_LOCK signal.

[0029] The working process of the power supply circuit of the embodiment is as follows:

[0030] When the machine is not started, the K4PWRON button is pressed for 1 second to start the machine.

[0031] The starting process: the CPU is powered on and reset, and it is determined whether the MCU_PWRON is kept high for 500 ms.

[0032] a) If MCU_PWRON remains 500ms, it is considered to be a valid power-on signal, and the MCU_PWR_LOCK signal output is set to high level, and the self-locking circuit is started. The power-on state flag is set in the software, and whether MCU_PWRON is high level is judged.

[0033] b) If MCU_PWRON does not meet the high level time of 500ms, it is considered to be an invalid power-on, and the CPU waits, and the MCU_PWR_LOCK output is low level.

[0034] During operation, the CPU judges whether MCU_PWRON remains high level for 500ms, and the power-on state flag is valid.

[0035] When powering off, press K4PWRON button for 1 second to power off.

[0036] During the power-off process, the CPU judges whether MCU_PWRON remains high level for 500ms, and the power-off state flag is valid.

[0037] a) If it is satisfied, the MCU_PWR_LOCK output is low level, and the power-on state flag is cleared. When the K4PWRON button is released, the entire self-locking circuit is powered off, and then the entire circuit board is powered off.

[0038] b) If the power-off condition is not met, nothing is changed.

[0039] The power supply circuit of the temperature and humidity collection device has a self-checking function, when the power is too low, that is, the MCU_PWRON signal is lower than the preset threshold, an alarm information is automatically sent, the alarm is automatically triggered based on the preset condition, the relevant personnel are timely notified to handle the abnormal situation, the loss is prevented, the staff is timely reminded to charge, the service life of the equipment can be prolonged, and the maintenance frequency is reduced. Embodiment 2

[0040] Reference Figure 5 The device includes a shell, the shell side includes a charging port 1 and an interface 2 for connecting a temperature and humidity sensor, a liquid crystal display screen and a plurality of mounting holes are arranged on the front face, the mounting holes are used for mounting, and the liquid crystal display module 3 is used for a worker to touch and press a key and display a result.

[0041] After the collection device of the application is connected to the upper computer, data is transmitted to the upper computer in real time through the communication module, and according to the needs of the verification object, the upper computer is configured first, and the operation steps after the configuration is completed are as follows:

[0042] 1) After the configuration is completed, the device is taken to the corresponding deployment point, the clear record key is clicked on the display screen, then the start record key is clicked, and the data and state displayed by the screen are inquired;

[0043] 2) After deployment, check the data uploaded by each device on the computer, and upload the data collected by the computer through the computer network;

[0044] 3) After verification, the device is retrieved, the key stops recording, and the verification takes about 2 days, with 1 minute of data transmission per minute.

Claims

1. A temperature and humidity collection device, characterized in that: The temperature and humidity detection device includes a processor, a temperature and humidity sensor, and a power supply circuit. The processor is electrically connected to the temperature and humidity sensor and is used to receive temperature and humidity information from the temperature and humidity sensor. The temperature and humidity sensor is used to collect temperature and humidity information of the environment in which the temperature and humidity detection device is located. The power supply circuit is connected to the processor and is used to supply power and has a self-locking circuit. The power supply circuit includes a button K4, resistors R14, R15, R16, R23, R24, R25, R32, capacitors C18, C19, transistors Q1, Q2, Q3, field effect transistors FET1 and FET2; one end of the button K4 is connected to the power supply, and the other end is connected to one end of the resistor R14 and one end of R15. The other end of R14 is connected to one end of the resistor R23 and the base of the transistor Q1. The other end of the resistor R23 is grounded and connected to one end of the capacitor C18. The other end of the capacitor C18 is connected to the base of the transistor Q1. The other end of the resistor R15 is connected to one end of the resistor R25 and the base of the transistor Q2. The other end of the resistor R25 is grounded and connected to one end of the capacitor C19. The other end of C19 is connected to the base of the transistor Q2. The collector of the transistor Q1 is connected to one end of the capacitor C18. The emitter of the transistor Q1 is connected to the gate of the field effect transistor FET1 and one end of the resistor R31. The other end of resistor R31 is connected to the power supply, the drain of field effect transistor FET1 is connected to the power supply, the source of field effect transistor FET1 is connected to one end of resistor R24, one end of resistor R24 ​​is used to be connected to the pin of the processor outputting the MCU_PWRON signal, the other end of the emission resistor R24 ​​is grounded, the collector of transistor Q2 is connected to one end of capacitor C19, the emitter of transistor Q2 is connected to the gate of field effect transistor FET2, one end of resistor R32 and the emitter of transistor Q3, the other end of resistor R32 is connected to the power supply, the drain of field effect transistor FET2 is connected to the power supply and the other end of resistor R32, the source is connected to the power supply, the base of transistor Q3 is connected to one end of resistor R26 and one end of R16, the other end of resistor R26 is grounded and connected to the collector of transistor Q3, and the other end of resistor R16 is used to be connected to the pin of the processor outputting the MCU_PWR_LOCK signal.

2. The temperature and humidity collecting device according to claim 1, characterized in that: The processor uses STM32G070CBT6 microcontroller.

3. The temperature and humidity collecting device according to claim 1, characterized in that: It also includes a communication module, which adopts a LORA communication module.

4. The temperature and humidity collecting device according to claim 1, characterized in that: It also includes three buttons and a liquid crystal display module. The three buttons are displayed on the liquid crystal display module. The three buttons are a power button, a start / stop button and a clear record button.

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