CN110740432A - OpenLinux-based low-power-consumption medicine cold chain monitoring system - Google Patents
OpenLinux-based low-power-consumption medicine cold chain monitoring system Download PDFInfo
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
- H04W4/30—Services specially adapted for particular environments, situations or purposes
- H04W4/38—Services specially adapted for particular environments, situations or purposes for collecting sensor information
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01C—MEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY
- G01C9/00—Measuring inclination, e.g. by clinometers, by levels
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D21/00—Measuring or testing not otherwise provided for
- G01D21/02—Measuring two or more variables by means not covered by a single other subclass
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S19/00—Satellite radio beacon positioning systems; Determining position, velocity or attitude using signals transmitted by such systems
- G01S19/38—Determining a navigation solution using signals transmitted by a satellite radio beacon positioning system
- G01S19/39—Determining a navigation solution using signals transmitted by a satellite radio beacon positioning system the satellite radio beacon positioning system transmitting time-stamped messages, e.g. GPS [Global Positioning System], GLONASS [Global Orbiting Navigation Satellite System] or GALILEO
- G01S19/42—Determining position
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
- H04W4/70—Services for machine-to-machine communication [M2M] or machine type communication [MTC]
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
- H04W4/80—Services using short range communication, e.g. near-field communication [NFC], radio-frequency identification [RFID] or low energy communication
Abstract
The invention discloses an OpenLinux-based low-power-consumption medical cold chain monitoring system, which relates to the technical field of medical cold chains and comprises a battery, an NB module chip and a sensor part, wherein the NB module chip is connected with the sensor part through an I/O port, the NB module chip is a CPU of a cold chain system and is used as a wireless communication chip of an NB-IOT, the sensor part comprises a GPS module, a temperature and humidity sensor and an inclination angle sensor.
Description
Technical Field
The invention belongs to the technical field of medical cold chain, and particularly relates to low-power-consumption medical cold chain monitoring systems based on OpenLinux.
Background
At present, a plurality of control schemes of a cold chain system are solutions of a CPU + NB-IOT module + sensors (a GPS, a temperature and humidity sensor and an inclination sensor). And the control scheme of the OpenLinux-based medical cold chain system is a wireless transmission solution of an NB-IOT + sensor.
The NB-IOT chip used based on the OpenLinux mode has the functions of both a CPU and a wireless communication chip, the cost of the CPU is saved in the OpenLinux mode, the power consumption of CPUs is saved in the power consumption mode, the lower the power consumption is at the fixed time of battery power, the longer the service time of a cold chain system is.
The kinds of OpenLinux-based low-power-consumption medical cold chain monitoring systems are provided, can meet the requirements of a new GSP (global system for mobile communications) and meet the set of cold chain solutions of the use requirements of hospitals, can be used in the scenes of shady and cool warehouses, cold stores, GSP smart refrigerators, shady and cool cabinets and the like, can be used for perfecting the Internet of things cold chain monitoring system, and can help hospitals to perfect the management system of medical cold chains by means of system management and professional services.
Disclosure of Invention
The invention aims to provide OpenLinux-based low-power-consumption medical cold chain monitoring systems, a special battery of an NB module chip is adopted, the battery capacity reaches 1WmA, heavy current discharging is adopted during discharging, the battery self-discharging rate is low, the battery self-discharging rate is suitable for long-term storage, the NB module chip has two functions, are used as a CPU of the system, are used as wireless communication chips of NB-IOT, and the sensor comprises a GPS module, a temperature and humidity sensor and an inclination angle sensor, so that the power consumption is reduced, the service life of the medical cold chain monitoring system is prolonged, the Internet of things cold chain monitoring system is improved, and the cost is saved.
In order to solve the technical problems, the invention is realized by the following technical scheme:
the invention relates to a low-power-consumption medicine cold chain monitoring system based on OpenLinux, which comprises a battery, an NB module chip and a sensor part, wherein the battery provides electric energy for the NB module chip and the sensor part, the NB module chip is connected with the sensor part through an I/O port, the NB module chip is a CPU of a cold chain system and serves as an NB-IOT wireless communication chip, the sensor part comprises a GPS module, a temperature and humidity sensor and an inclination angle sensor, the GPS module is used for positioning the cold chain system and comprises a GPS circuit and an power supply control circuit, the GPS circuit is connected with the GPS chip, the power supply control circuit is used for controlling the power on-off of the GPS module, the temperature and humidity sensor is internally provided with a second power supply control circuit and a temperature and humidity chip, the second power supply control circuit controls the working state of the temperature and humidity sensor, the third power supply control circuit, the inclination angle chip and the third power supply control circuit control the working state of the inclination angle sensor, so that the new GSP requirement can be met, the requirements of hospital use in a cloudy warehouse, a refrigerator, a professional cooling management system and a hospital help management system and a hospital are perfected by the help of the internet of the cold chain monitoring system.
, the power control circuit controls the power on-off of the MOS tube by controlling the voltage of the GPIO9 pin, so as to control the power on-off of the GPS module, and the following steps are specifically executed when the power on-off of the GPS module is controlled:
the power input enters an inductor which is used for filtering, and a GPIO9 pin of an th power control circuit is connected with an NB module chip;
SSO 1: the GPIO9 pin is in high level, the triode is conducted, the grid G voltage of the MOS tube is in low level, the MOS tube is connected to supply power for the GPS module;
SSO2, the pin of GPIO9 is at low level, the triode is cut off, the grid G voltage of the MOS tube is at high level, the MOS tube is cut off, the GPS module is powered off, therefore, the power control circuit can control the power on-off of the MOS tube by controlling the voltage of the pin of GPIO9, thereby controlling the power on-off of the GPS module.
, a button cell is connected in the GPS circuit, when the battery power supply does not work, the button cell works at the moment to provide power for the V _ BCKP of the GPS chip, and the GPS chip works in a standby state.
, the GPS circuit is connected with GPS antenna, the working state of the GPS antenna is controlled by the GPS chip, the specific control method is as follows:
s1: enabling an ANTON pin of a GPS chip to be at a high level, enabling a triode to be conducted, enabling a G of an MOS tube to be at a low level, enabling the MOS tube to be conducted, and enabling a GPS antenna to work;
s2: the ANTON pin of the GPS chip is at a low level, the triode is cut off, the gate of the MOS tube is at a high level, the MOS tube is cut off, and the GPS antenna does not work.
, the second power control circuit controls the working state of the temperature and humidity sensor through an MOS tube and a triode, and the specific control method of the working state of the temperature and humidity sensor is as follows:
s00: the power input enters the MOS tube source S; the second power supply control circuit DTR _ A is connected with a corresponding DTR _ A pin of the NB module chip;
s01: enabling the DTR _ A to be at a high level, conducting the triode, enabling a grid G of the MOS tube to be at a low level, switching on the MOS tube, and electrifying the temperature and humidity sensor to work;
s02: make DTR _ A be in the low level, the triode ends, the grid G of MOS pipe is the high level, the MOS pipe ends, temperature and humidity sensor outage stop work, so the second power control circuit can be through the voltage height of control DTR _ A, can control the power break-make of MOS pipe, thereby control temperature and humidity sensor's power break-make, the SDA of temperature and humidity chip, the SDA of SCL and NB module chip, SCL are direct, can use temperature and humidity sensor through the IIC communication.
, the third power control circuit controls the power on/off of the MOS transistor by controlling the voltage of the CTS, so as to control the power on/off of the tilt sensor, and the specific method for controlling the operating state of the tilt sensor includes:
s000: the power input enters the source S of the MOS tube, and the CTS is connected with the CTS pin corresponding to the NB module chip;
s001: enabling the CTS to be at a high level, enabling the triode to be conducted, enabling the grid G voltage of the MOS tube to be at a low level, enabling the MOS tube to be connected, and enabling the temperature and humidity module to be electrified to work;
s002: enabling the CTS to be at a low level, stopping the triode, enabling the grid G voltage of the MOS tube to be at a high level, stopping the MOS tube, and enabling the inclination angle chip not to work; therefore, the third power control circuit can control the power on-off of the MOS tube by controlling the voltage of the CTS, so as to control the power on-off of the tilt angle sensor, the SDA and the SCL of the tilt angle chip and the SDA and the SCL of the NB module chip are direct, and the tilt angle sensor can be used through IIC communication.
, the temperature and humidity chip adopts an SHT30 type chip, the working power is 3.2uA on average, the sleep power is 0.9uA on average, the temperature working range is-40-125 degrees, the GPS chip adopts an L76-LB type chip, control pins AUX _ RX and AUX _ TX of the GPS chip are connected to corresponding serial ports of the NB module chip, the inclination angle chip adopts an ADXL345 type chip, the power supply voltage range is 2.0-3.6V, the working current is 5uA, and the battery adopts a battery with the model number of RAMNAYER26500 and the capacity of 1 WmA.
The invention has the following beneficial effects:
the wireless transmission solution of the NB-IOT + sensor is adopted, a special battery of an NB module chip is adopted, the battery capacity reaches 1WmA, heavy current discharging is adopted during discharging, the battery self-discharging rate is low, the NB module chip is suitable for long-term storage, the NB module chip has two functions, are used as a CPU of a system, the other are used as wireless communication chips of the NB-IOT, and the sensor comprises a GPS module, a temperature and humidity sensor and an inclination angle sensor, reduces power consumption, prolongs the service life of a medical cold chain monitoring system, improves the Internet of things cold chain monitoring system and saves cost.
Of course, it is not necessary that achieve all of the above-described advantages at the same time for any product that embodies the invention.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.
FIG. 1 is a block diagram of a low power consumption medical cold chain monitoring system based on OpenLinux;
FIG. 2 is a circuit diagram of th power control circuit of the invention;
FIG. 3 is a circuit diagram of the GPS circuit of the present invention;
FIG. 4 is a circuit diagram of a second power control circuit according to the present invention;
FIG. 5 is an internal circuit diagram of the temperature and humidity sensor according to the present invention;
FIG. 6 is a circuit diagram of a third power control circuit according to the present invention;
fig. 7 is an internal circuit diagram of the tilt sensor of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only partial embodiments of of the present invention, rather than all embodiments.
In one embodiment, please refer to FIGS. 1-7:
the invention relates to a low-power-consumption medical cold chain monitoring system based on OpenLinux, which comprises a battery, an NB module chip and a sensor part, wherein the battery provides electric energy for the NB module chip and the sensor part, the NB module chip is connected with the sensor part through an I/O port, the NB module chip is a CPU of a cold chain system and serves as a wireless communication chip of NB-IOT, the sensor part comprises a GPS module, a temperature and humidity sensor and an inclination angle sensor, the battery is a special battery of the NB chip, the battery capacity reaches 1WmA, the model is RAMNAY ER26500, the capacity is 1WmA, large current is adopted for discharging during discharging, the self-discharge rate of the battery is low, the battery is suitable for long-term storage, the cost of single-chip computers is saved in an OpenLinux mode, the power consumption of single-chip computers is saved in terms of power consumption, the power consumption is reduced under the condition that the electric quantity of the battery is .
Preferably, the GPS module mainly functions to provide positioning for a cold chain tag, but the GPS requires network searching when in use and has a large power consumption when in use, so that an th power control circuit of the module is added to the GPS circuit part, as shown in fig. 2, when the positioning function is not required to be provided, the th power control circuit is used to turn off the power supply of the GPS module, so that the GPS module does not work, and energy consumption is reduced, the GPS circuit is connected with a GPS chip U4, the th power control circuit controls the power on/off of the MOS transistor Q11 by controlling the voltage of the GPIO9 pin, and further controls the power on/off of the GPS module, and the following steps are specifically performed when controlling the power on/off of the GPS module:
in SSOO, a 3V3 power supply input enters an inductor L6 which is used for filtering, a GPIO9 pin of a power supply control circuit is connected with an NB module chip, and the GPIO9 is a control pin;
SSO 1: the pin of GPIO9 is at high level, the triode Q12 is conducted, the grid G voltage of the MOS tube Q11 is at low level, the MOS tube Q11 is connected, and the power supply 3V3 is from S → D, so that the 3V3_ GPS voltage is 3.3V, which can supply power for the GPS module;
SSO2, the pin GPIO9 is at low level, the triode Q12 is cut off, the grid G voltage of the MOS tube Q11 is at high level, the MOS tube Q11 is cut off, the power supply can not pass through S → D, so that 3V3_ GPS is 0, the power supply can not be supplied to the GPS module, and the power supply of the GPS module is cut off, therefore the power supply control circuit can control the power supply of the MOS tube Q11 to be switched on and off by controlling the voltage of the pin GPIO9, and the power supply of the GPS module is switched on and off.
Preferably, as shown in fig. 3, the GPS chip U4 adopts a select L76-LB chip, two main control pins of the GPS chip U4 are AUX _ RX and AUX _ TX, which are serial ports and connected to corresponding serial ports of the NB module chip, R70 and R71 are pull-up resistors to improve the voltage output capability of the serial ports, the GPS circuit is connected with button battery BT1, when the 3V3_ GPS voltage is 0, the button battery BT1 supplies power to maintain the positioning capability of the GPS module, the diode D7 adjusts the power output direction, when the battery works, the current direction is from 3V3_ GPS to R38 to V _ BCKP of the GPS chip U4, when the battery power does not work, the 3V3_ GPS power voltage is 0V, at this time, the button battery 1 works to supply power to V _ BCKP of the GPS chip U4, and the GPS chip U4 works in a standby state.
Preferably, as shown in fig. 3, the GPS circuit is connected with GPS antenna a1, the MOS transistor Q9 and the triode Q10 are switches for controlling the power of the GPS antenna a1, and the operating state of the GPS antenna a1 is controlled by the GPS chip U4, specifically the control method is as follows:
s1: an ANTON pin of a GPS chip U4 is at a high level, a triode Q10 is conducted, a MOS tube Q9G is at a low level, a MOS tube Q9 is conducted, current passes through S → D and finally reaches a GPS antenna A1, and the GPS antenna A1 works;
s2: the ANTON pin of the GPS chip U4 is at a low level, the triode Q10 is cut off, the grid of the MOS transistor Q9 is at a high level, the MOS transistor Q9 is cut off, the current cannot flow from S → D, and the GPS antenna A1 cannot work.
Preferably, a second power supply control circuit and a temperature and humidity chip U2 are arranged in the temperature and humidity sensor, the temperature and humidity chip U2 adopts an SHT30 chip, the average working power is 3.2uA, the average sleeping power is 0.9uA, and the temperature working range is-40-125 degrees; the second power supply control circuit controls the working state of the temperature and humidity sensor; as shown in fig. 4-5, the second power control circuit controls the working state of the temperature and humidity sensor through the MOS transistor Q6 and the triode Q7, and the specific control method of the working state of the temperature and humidity sensor is as follows:
s00: the input of a power supply 3V3_ BA enters the source S of the MOS transistor Q6; the second power supply control circuit DTR _ A is connected with a corresponding DTR _ A pin of the NB module chip;
s01: the DTR _ A is at a high level, the triode Q7 is conducted, the grid G of the MOS tube Q6 is at a low level, the MOS tube Q6 is connected, and the power supply 3V3_ BA is from S → D, so that the voltage of SH3 is 3.3V, power can be supplied to the temperature and humidity sensor, and the temperature and humidity sensor is electrified to work;
s02: make DTR _ A be in the low level, triode Q7 ends, MOS pipe Q6 ' S grid G is the high level, MOS pipe Q6 ends, the power can not be through from S → D, so SH3 voltage is 0, temperature and humidity sensor outage stop work, so second power control circuit can be through the voltage height of control DTR _ A, can control MOS pipe Q6 ' S power break-make, thereby control temperature and humidity sensor ' S power break-make, temperature and humidity chip U2 ' S SDA, SCL and NB module chip ' S SDA, SCL are direct, can use temperature and humidity sensor through the IIC communication.
Preferably, a third power supply control circuit and an inclination chip U6 are arranged in the inclination sensor, and the inclination chip U6 adopts an ADXL345 type chip, belonging to a low-power consumption inclination chip and a power supply voltage range: 2.0V to 3.6V, the working current is 5uA, the third power control circuit controls the power on-off of the MOS tube Q13 by controlling the voltage of the CTS, thereby controlling the power on-off of the tilt sensor, and the specific method for controlling the working state of the tilt sensor comprises the following steps:
s000: the input of a power supply 3V3 enters a source S of an MOS transistor Q13, and a CTS is connected with a CTS pin corresponding to an NB module chip;
s001: the CTS is enabled to be at a high level, the triode Q14 is conducted, the voltage of the grid G of the MOS tube Q13 is at a low level, the MOS tube Q13 is connected, and the power CTS is S → D, so that the voltage of the AD345 is 3.3V, and the temperature and humidity module is electrified to work;
s002: the CTS is at a low level, the triode Q14 is cut off, the grid G voltage of the MOS tube Q13 is at a high level, the MOS tube Q13 is cut off, and the power supply can not pass through S → D, so that the AD345 voltage is 0, and the inclination angle chip U6 does not work; therefore, the third power control circuit can control the power on-off of the MOS transistor Q13 by controlling the voltage of the CTS, thereby controlling the power on-off of the tilt sensor, and the SDA and SCL of the tilt chip U6 and the SDA and SCL of the NB module chip are direct, and the tilt sensor can be used through IIC communication.
Low-power-consumption medical cold chain monitoring system based on OpenLinux adopts a wireless transmission solution of an NB-IOT + sensor, adopts a special battery of an NB module chip, the battery capacity reaches 1WmA, high-current discharge is adopted during discharge, the battery self-discharge rate is low, the NB module chip is suitable for long-term storage, of the NB module chips serve as a CPU of the system, of the NB module chips serve as a wireless communication chip of the NB-IOT, and the sensor comprises a GPS module, a temperature and humidity sensor and an inclination angle sensor, reduces power consumption, prolongs the service life of the medical cold chain monitoring system, improves the Internet of things cold chain monitoring system, saves cost, actually measures the power consumption of a cold chain circuit, achieves 17uA of standby power consumption, takes a 10000mA of battery as an example, and theoretically can achieve 65 years of standby time at normal temperature and 25 ℃.
In the description herein, reference to the term " embodiments," "examples," "specific examples," or the like, means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least embodiments or examples of the invention.
The preferred embodiments of the invention disclosed above are intended to be illustrative only. The preferred embodiments are not intended to be exhaustive or to limit the invention to the precise embodiments disclosed. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the invention and the practical application, to thereby enable others skilled in the art to best utilize the invention. The invention is limited only by the claims and their full scope and equivalents.
Claims (8)
1. The OpenLinux-based low-power-consumption medicine cold chain monitoring system is characterized by comprising a battery, an NB module chip and a sensor part;
the battery provides electric energy for the NB module chip and the sensor part;
the NB module chip is connected with the sensor part through the I/O port;
the NB module chip is a CPU of the cold chain system and is used as a wireless communication chip of the NB-IOT;
the sensor part comprises a GPS module, a temperature and humidity sensor and an inclination angle sensor;
the GPS module is used for positioning a cold chain system, and comprises a GPS circuit and an th power supply control circuit, wherein the GPS circuit is connected with a GPS chip (U4), and the th power supply control circuit is used for controlling the power supply of the GPS module to be switched on and off;
a second power supply control circuit and a temperature and humidity chip (U2) are arranged in the temperature and humidity sensor, and the second power supply control circuit controls the working state of the temperature and humidity sensor;
the tilt sensor is internally provided with a third power supply control circuit and a tilt chip (U6), and the third power supply control circuit controls the working state of the tilt sensor.
2. The OpenLinux-based low-power-consumption medical cold chain monitoring system according to claim 1, wherein the -th power control circuit controls the power on/off of the GPS module by controlling the voltage of the GPIO9 pin to control the power on/off of the MOS transistor (Q11), and the following steps are specifically executed when controlling the power on/off of the GPS module:
a power input enters an inductor (L6), and a GPIO9 pin of the power control circuit is connected with the NB module chip;
SSO 1: the GPIO9 pin is in high level, the triode (Q12) is conducted, the grid G voltage of the MOS tube (Q11) is in low level, and the MOS tube (Q11) is connected to supply power for the GPS module;
SSO 2: the pin GPIO9 is at low level, the triode (Q12) is cut off, the grid G voltage of the MOS tube (Q11) is at high level, the MOS tube (Q11) is cut off, and the power supply of the GPS module is cut off.
3. The OpenLinux-based low-power-consumption medical cold chain monitoring system is characterized in that button cells (BT 1) are connected in the GPS circuit, when a battery power supply does not work, the button cells (BT 1) work to provide power for V _ BCKP of the GPS chip (U4), and the GPS chip (U4) works in a standby state.
4. The OpenLinux-based low-power-consumption medical cold chain monitoring system is characterized in that an GPS antenna (A1) is connected in the GPS circuit, the working state of the GPS antenna (A1) is controlled by a GPS chip (U4), and the specific control method is as follows:
s1: an ANTON pin of a GPS chip (U4) is at a high level, a triode (Q10) is conducted, a MOS (Q9) is at a low level, a MOS (Q9) is conducted, and a GPS antenna (A1) works;
s2: an ANTON pin of a GPS chip (U4) is at a low level, a triode (Q10) is cut off, a gate of an MOS tube (Q9) is at a high level, the MOS tube (Q9) is cut off, and a GPS antenna (A1) does not work.
5. The OpenLinux-based low-power-consumption medical cold chain monitoring system according to claim 1, wherein the second power control circuit controls the working state of the temperature and humidity sensor through an MOS (metal oxide semiconductor) tube (Q6) and a triode (Q7), and the specific control method of the working state of the temperature and humidity sensor is as follows:
s00: the power input enters a source electrode S of the MOS tube (Q6); the second power supply control circuit DTR _ A is connected with a corresponding DTR _ A pin of the NB module chip;
s01: enabling the DTR _ A to be at a high level, enabling the triode (Q7) to be conducted, enabling a grid G of the MOS tube (Q6) to be at a low level, enabling the MOS tube (Q6) to be connected, and enabling the temperature and humidity sensor to be electrified to work;
s02: and (3) enabling the DTR _ A to be at a low level, cutting off the triode (Q7), enabling the grid G of the MOS tube (Q6) to be at a high level, cutting off the MOS tube (Q6), and stopping the temperature and humidity sensor when the temperature and humidity sensor is powered off.
6. The OpenLinux-based low-power-consumption medical cold chain monitoring system is characterized in that the third power control circuit controls the power on/off of the MOS tube (Q13) by controlling the voltage of the CTS, so as to control the power on/off of the tilt sensor, and the specific method for controlling the working state of the tilt sensor comprises the following steps:
s000: the power supply input enters a source S of an MOS (metal oxide semiconductor) tube (Q13), and a CTS is connected with a CTS pin corresponding to the NB module chip;
s001: enabling the CTS to be at a high level, enabling the triode (Q14) to be conducted, enabling the grid G voltage of the MOS tube (Q13) to be at a low level, enabling the MOS tube (Q13) to be connected, and enabling the temperature and humidity module to be electrified and work;
s002: when the CTS is in a low level, the triode (Q14) is cut off, the grid G voltage of the MOS tube (Q13) is in a high level, and the MOS tube (Q13) is cut off.
7. The OpenLinux-based low-power-consumption medical cold chain monitoring system according to claim 1, wherein:
the temperature and humidity chip (U2) adopts an SHT30 type chip, the average working power is 3.2uA, the average sleeping power is 0.9uA, and the temperature working range is-40-125 degrees;
the GPS chip (U4) adopts an L76-LB type chip, and control pins AUX _ RX and AUX _ TX of the GPS chip (U4) are connected to corresponding serial ports of the NB module chip;
the inclination chip (U6) adopts an ADXL345 type chip, and the power supply voltage range is as follows: 2.0V to 3.6V, and the working current is 5 uA.
8. The battery is an ER26500 battery with the capacity of 1 WmA.
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| CN114895595A (en) * | 2022-05-18 | 2022-08-12 | 福州市凌睿智捷电子有限公司 | Automatic identification device and method for multiple sensors of Internet of things |
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