CN111882849A - Device and method for collecting and detecting temperature and humidity inside and outside granary - Google Patents
Device and method for collecting and detecting temperature and humidity inside and outside granary Download PDFInfo
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- G08C—TRANSMISSION SYSTEMS FOR MEASURED VALUES, CONTROL OR SIMILAR SIGNALS
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- 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
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Abstract
The invention discloses a device and a method for collecting and detecting the temperature and humidity inside and outside a granary. The device comprises a detection device, a measurement and control cable, a temperature and humidity measurement and control circuit and a processor. The temperature and humidity measurement and control circuit comprises a data reading pin, a data writing pin, a pull-up driving pin, a pull-down driving pin, a data pin, a non-inverting buffer circuit driving module, a current amplification module I, a circuit protection module and a current amplification module II. The non-inverting buffer circuit driving module is connected with the data reading pin and the data pin, the circuit protection module is connected with the data writing pin and the data pin, the first current amplification module is connected with the pull-up driving pin and the data pin, and the second current amplification module is connected with the pull-down driving pin and the data pin. The input and output ends of the processor are connected with the data reading pin, the data writing pin, the pull-up driving pin and the pull-down driving pin. The invention improves the communication reliability and the load carrying capacity, shortens the average effective time of single-path measurement and control, and improves the real-time efficiency of measurement and control.
Description
Technical Field
The invention relates to a detection device in the technical field of granary monitoring, in particular to a granary inside and outside temperature and humidity acquisition and detection device and a granary inside and outside temperature and humidity acquisition and detection method of the detection device.
Background
In the field of grain condition measurement and control, relevant departments pay attention to the storage environment in order to ensure the quality of stored grains, and particularly important indexes in the grain storage process are ambient temperature and humidity, so that a device is needed to monitor the temperature and the humidity inside and outside a granary so as to ensure a proper storage environment. According to investigation, most of the conventional temperature and humidity monitoring equipment has poor functions, some temperature and humidity monitoring equipment only supports single-channel acquisition, and cannot meet the requirement that a plurality of temperature measuring cables work simultaneously in a granary with a large volume; some methods can only realize data acquisition by calling historical data, and cannot achieve the purpose of real-time acquisition; and the other products are relatively complex in design and use, cannot meet the requirements of easy installation, easy collection and easy maintenance, and therefore have poor field adaptability. When the environment monitoring equipment cannot well achieve the purpose of data acquisition, the environment in the granary cannot be monitored in real time, so that the quality of stored grains cannot be effectively guaranteed, the production benefits of relevant departments are influenced, and loss is brought.
At present, various temperature and humidity monitoring devices appear in the domestic market, but the devices generally have the defects of easy lightning strike of cables, burnout of sensors, complex operation, high price, poor applicability and the like, and most importantly, the existing temperature and humidity detection devices are low in measurement and control efficiency and long in single-path average measurement and control time, so that the design of the temperature and humidity acquisition device which is low in cost, easy to operate and capable of preventing lightning stroke has very important practical significance by combining the characteristics of a granary.
Disclosure of Invention
The invention provides a device and a method for collecting and detecting the temperature and humidity inside and outside a granary, aiming at solving the technical problems that the existing temperature and humidity detection equipment is low in measurement and control efficiency and long in single-path average measurement and control time.
The invention is realized by adopting the following technical scheme: the utility model provides a detection device is gathered to inside and outside humiture of granary, it includes:
a plurality of detection devices;
the detection device comprises a measurement and control cable, a plurality of detection devices and a plurality of detection devices, wherein the plurality of detection devices are mounted on the measurement and control cable;
the temperature and humidity measurement and control circuit comprises a data reading pin, a data writing pin, a pull-up driving pin, a pull-down driving pin, a data pin, a non-inverting buffer circuit driving module, a current amplification module I, a circuit protection module and a current amplification module II; the data reading pin is connected with the output end of the non-inverting buffer circuit driving module, the data writing pin is connected with the input end of the circuit protection module, the pull-up driving pin is connected with the input end of the first current amplification module, and the pull-down driving pin is connected with the input end of the second current amplification module; the write data pin is connected with the input end of the non-inverting buffer circuit driving module, the output end of the first current amplification module, the output end of the circuit protection module and the output end of the second current amplification module; the measurement and control cable is connected with the data pin; and
the input and output ends of the processor are connected with the read data pin, the write data pin, the pull-up driving pin and the pull-down driving pin; when reading, the processor firstly opens the pull-down driving pin, enables the data pin to output a low level signal through the current amplification module II, then closes the pull-down driving pin and opens the pull-up driving pin, enables the data pin to output a high level signal through the current amplification module I, and finally closes the pull-up driving pin, enables the data pin to generate a rising edge pulse to the detection device, the detection device replies the current data bit state, and the processor replies a response signal through reading the state of the data reading pin, so as to realize data bit reading; when writing operation is carried out, the processor firstly opens the pull-down driving pin, the data pin outputs a low level signal through the current amplification module II, then the pull-down driving pin is closed, and finally: (1) when writing 1, opening the pull-up driving pin, enabling the data pin to output a high level signal through the first current amplification module, and finally closing the pull-up driving pin to enable the data pin to generate a rising edge pulse to the detection device; (2) when 0 is written in, the pull-down driving pin is continuously opened, the data pin continuously outputs a low level signal through the current amplification module II, then the pull-down driving pin is closed, finally the pull-up driving pin is opened, the data pin outputs a high level signal through the current amplification module I, then the pull-up driving pin is closed, the detection device replies the current data bit state, and the processor realizes data bit writing operation through the data reading pin.
The processor of the invention realizes a read-write separation mechanism through each module and pin of the temperature and humidity measurement and control circuit. During reading operation, the processor firstly opens the pull-down driving pin and then opens the pull-up driving pin to generate a rising pulse on the data pin, and the detection device replies the current data bit state, so that the processor replies a response signal by reading the state of the data reading pin to realize data bit reading operation. During writing operation, the processor firstly opens the pull-down driving pin to generate a low level signal, then closes the pull-down driving pin, controls the pull-up driving pin and the pull-down driving pin according to different writing-in conditions to generate a level signal with corresponding requirements, and finally the detection device replies the current data bit state to realize data bit writing operation through the data reading pin. Due to the fact that time division multiplexing mode multi-path parallel acquisition is adopted in processing of a measurement and control mechanism, adjustment of different driving states is conducted aiming at data reading and writing, reliability of data communication is improved, loading capacity of a temperature and humidity measurement and control circuit module is improved, average effective time of single-path measurement and control is shortened, real-time measurement and control efficiency is improved, and the technical problems that existing temperature and humidity detection equipment is low in measurement and control efficiency and long in single-path average measurement and control time are solved.
As a further improvement of the above solution, the detection device further includes:
and the isolation protection circuit is arranged between the temperature and humidity measurement and control circuit and the measurement and control cable.
Further, the isolation protection circuit comprises a DS2413 chip; a data input pin of the DS2413 chip is connected with a data pin of the temperature and humidity measurement and control circuit, and a grounding pin of the DS2413 chip is connected with a grounding pin of the temperature and humidity measurement and control circuit; the processor selects the working mode of the DS2413 chip through a write-in response signal, and a PIOA pin of the DS2413 chip is connected with a ground wire of the measurement and control cable; and the data wire of the measurement and control cable is connected with the data pin of the temperature and humidity measurement and control circuit.
As a further improvement of the above solution, the detection device further includes:
the communication module is used for receiving a configuration instruction and a measurement and control instruction sent by a cloud server; the processor is accessed to the cloud server through the communication module, and identifies and executes a measurement and control instruction issued by the cloud server to acquire environmental information, measure and control data; the processor identifies the state of the measurement and control cable on line according to the measurement and control data, acquires the dead pixel position of at least one sensor, and reports the corresponding dead pixel position to a remote server or directly uploads the dead pixel position to a cloud terminal through a cloud host.
Further, the communication module includes a wired communication unit and a wireless communication unit; the wired communication unit is used for the processor to perform wired communication with the cloud server; the wireless communication unit is used for the processor to perform wireless communication with the cloud server.
As a further improvement of the above solution, the detection device further includes:
and the power supply module is used for rectifying and stabilizing external input voltage through an internal voltage stabilizer so as to output direct current voltage, supplying the direct current voltage after conversion to the temperature and humidity measurement and control circuit and the detection device through a linear voltage stabilizer, and supplying the direct current voltage after conversion to the processor through a power supply voltage stabilizer.
As a further improvement of the above solution, the detection device further includes:
and the number identification module is electrically connected with the processor and is used for identifying the number of the detection device.
As a further improvement of the above scheme, the measurement and control mechanism of the processor adopts a time division multiplexing mode for multi-path parallel acquisition, an independent task thread is established for the tasks required to be executed by each acquisition port, and each thread executes the tasks in a task queue; the processor distributes resources of each thread according to the overall load capacity of the system, controls the multiple threads to synchronously and coordinately run until all tasks in the thread task queue are completed, ends the acquisition task, and uploads the acquired data to the cloud host or the cloud end through the communication module after processing the acquired data; the data processing mechanism of the processor is to carry out sequencing processing according to the root layer number of a detection device on the measurement and control cable, when the site with the positioning requirement of a corresponding point of the detection device is on, the root layer information data of the detection device is configured by utilizing two self-defined fields, the position of the detection device is rapidly positioned according to the root layer information data during acquisition, and the position and the type of a fault point are rapidly positioned by a data filtering method; the processor automatically supplements a dead pixel according to the continuity of the root layer number; and the system operation mechanism of the processor is a watchdog mechanism of an independent window, and the test task is backed up and stored in real time.
Further, the communication module is provided with a three-wire system USART serial communication port and a four-wire system SPI communication port, the processor is an STM32 microprocessor, the non-inverting buffer line driving module is a 74hc1g125gv chip, the current amplification module I and the current amplification module II are SS8050LT1_ NPN chips, and the circuit protection module is an S9012_ sot23 chip.
Compared with the existing temperature and humidity detection equipment, the device and the method for acquiring and detecting the temperature and humidity inside and outside the granary have the following beneficial effects:
1. this detection device is gathered to inside and outside humiture of granary, its each module and pin through humiture measurement and control circuit realize the mechanism of read-write separation. During reading operation, the processor firstly opens the pull-down driving pin and then opens the pull-up driving pin to generate a rising pulse on the data pin, and the detection device replies the current data bit state, so that the processor replies a response signal by reading the state of the data reading pin to realize data bit reading operation. During writing operation, the processor firstly opens the pull-down driving pin to generate a low level signal, then closes the pull-down driving pin, controls the pull-up driving pin and the pull-down driving pin according to different writing-in conditions to generate a level signal with corresponding requirements, and finally the detection device replies the current data bit state to realize data bit writing operation through the data reading pin. Due to the fact that the multi-channel parallel acquisition is carried out in a time division multiplexing mode in the processing of the measurement and control mechanism, adjustment of different driving states is carried out aiming at data reading and writing, the reliability of data communication is improved, the load capacity of the temperature and humidity measurement and control circuit module is improved, the average effective time of single-channel measurement and control is shortened, and the real-time efficiency of measurement and control is improved. The device improves the transmission distance of serial data through the mode that multistage drive is enlargied, can increase the upper limit of single track mount sensor number, enlarges single track measurement and control cable coverage, reduces and observes and controls the detection convergent point, improves data communication's reliability, has reduced equipment cost.
2. This detection device is gathered to inside and outside humiture of granary, it has the isolation protection circuit to design between its humiture measurement and control circuit and the measurement and control cable, and the isolation protection circuit breaks off the public ground long-time connection of humiture measurement and control circuit and measurement and control cable, avoids measuring and control cable on the sensor continuous operation to reduce the spoilage, play the effect of protection measurement and control cable, can reduce the risk that equipment burns out the measurement and control cable when work is unusual.
3. The grain bin internal and external temperature and humidity acquisition and detection device breaks away from a traditional single-thread measurement and control mechanism of a measurement and control unit in the aspect of processing of the measurement and control mechanism, an independent task thread is established for tasks to be executed by each acquisition port by adopting a time division multiplexing idea, each thread executes tasks in a task queue, each thread resource is distributed by a CPU according to the overall load capacity of a system, a plurality of threads are controlled to synchronously and coordinately run until the tasks in all the thread task queues are completed, the acquisition task is finished, and the acquired data is uploaded to a cloud host or a cloud end through an interface communication module after being processed. The device can shorten the average effective time of single-path measurement and control through the optimization processing of the operation measurement and control mechanism, and improve the real-time efficiency of measurement and control.
4. The device for collecting and detecting the temperature and humidity inside and outside the granary is compatible with two modes of real-time collection and timed uploading in the design of a collection module. In a real-time mode, real-time data acquisition and uploading are carried out by responding to a measurement and control instruction from a cloud host or a cloud server in real time; under the timing mode, environmental data are collected at regular time and stored locally, a measurement and control instruction from a cloud host or a cloud server is responded, instruction reply is immediately carried out, and timeliness is higher. The real-time and timing temperature measurement modes can be modified and confirmed through configuration instructions so as to adapt to measurement and control requirements in different environments.
5. This detection device is gathered to inside and outside humiture of granary, it can be according to customer's demand, carries out the sequencing processing to the detection device root layer serial number in the measurement and control cable on data processing's mechanism. In the field with the positioning requirement of the corresponding point of the detection device, the two fields customized by a user are used for configuring the root layer information data of the detection device, the position of the detection device is quickly positioned according to the root layer information during acquisition, and the position and the type of a fault point can be quickly positioned by a data filtering method. According to the continuity of the root layer number of the detection device, the dead pixel is automatically supplemented to ensure the continuity of data, and when the dead pixel occurs, the quick positioning and fault removal can be realized according to the uploaded dead pixel positions and the number.
6. The device for collecting and detecting the temperature and humidity inside and outside the granary has the advantages that the device is prevented from being halted through a watchdog mechanism of an independent window in the system operation mechanism, and the measurement and control task can be continuously executed when the device is abnormally restarted through a test task real-time backup storage mode. The watchdog of the independent window keeps a monitoring state at the moment when the system runs, so that the condition that the system enters a dead loop or a CPU (central processing unit) occupies a long-term state due to the fact that a certain thread is blocked can be avoided. Meanwhile, the system backs up the measurement and control task and the running state of the current system in real time during running so as to avoid that the system can quickly recover work during abnormal restarting and ensure the continuous effectiveness and the stability of the running of the system.
7. The device for collecting and detecting the temperature and humidity inside and outside the granary uses an industrial grade single chip microcomputer with high processing rate as a core control unit, and can effectively ensure the operation processing speed, the anti-interference performance and the stability of an on-site measurement and control system; by adopting the modular design scheme, the universality, the stability and the transportability of the device are enhanced, and the device can be suitable for diversified temperature and humidity measurement and control environments in actual production.
8. The beneficial effects of the method for collecting and detecting the internal and external humiture of the granary are the same as those of the device for collecting and detecting the internal and external humiture of the granary, and are not repeated herein.
Drawings
Fig. 1 is a general topology structure diagram of the granary internal and external temperature and humidity acquisition and detection device according to embodiment 1 of the present invention.
Fig. 2 is a schematic diagram of a temperature and humidity measurement and control circuit of the granary inside and outside temperature and humidity acquisition and detection device in fig. 1.
Fig. 3 is a topological structure diagram of an isolation protection circuit of the grain bin internal and external temperature and humidity acquisition and detection device in fig. 1.
Fig. 4 is a schematic diagram of an isolation protection circuit of the granary internal and external temperature and humidity acquisition and detection device in fig. 1.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Example 1
Referring to fig. 1, the present embodiment provides a device for collecting and detecting the temperature and humidity inside and outside a granary, which is applied to the temperature detection inside and outside the granary, and detected data can be transmitted to a background. The detection device comprises a detection device, a measurement and control cable, a temperature and humidity measurement and control circuit, a processor, an isolation protection circuit, a communication module, a power module and a number identification module. Some of these modules may be integrated together, or a single module may be split into multiple units with different functions.
The number of the detection devices is multiple, and the detection devices generally adopt sensors. The detection devices can adopt the existing sensing devices, are arranged inside and outside the granary, and can detect the temperature information and the humidity information inside and outside the granary in real time. The detection device can adopt a temperature sensor and a humidity sensor, and can also adopt an integrated temperature and humidity sensor. Wherein, a plurality of detection devices are mounted on the measurement and control cable. In this embodiment, the measurement and control cable and the corresponding detection device may constitute a sensor cable, such as a DS18B20 cable. Thus, each sensor cable can be arranged in a certain area and detect the area.
Referring to fig. 2, the temperature and humidity measurement and control circuit is provided with a driving circuit, and the driving circuit includes a data reading pin, a data writing pin, a pull-up driving pin, a pull-down driving pin, a data pin, a non-inverting buffer circuit driving module, a first current amplification module, a circuit protection module, and a second current amplification module. The data reading pin is connected with the output end of the non-inverting buffer circuit driving module, the data writing pin is connected with the input end of the circuit protection module, the pull-up driving pin is connected with the input end of the first current amplification module, and the pull-down driving pin is connected with the input end of the second current amplification module. The write data pin is connected with the input end of the non-inverting buffer circuit driving module, the output end of the first current amplification module, the output end of the circuit protection module and the output end of the second current amplification module. The measurement and control cable is connected with the data pin.
In this embodiment, the non-inverting buffer line driving module is a 74hc1g125gv chip, the first current amplifying module and the second current amplifying module are both SS8050LT1_ NPN chips, and the circuit protection module is an S9012_ sot23 chip. The four pins of the WireIn1, the WirePu1, the WirePd1 and the WireOut1 are respectively connected with an I/O pin of the processor, the WireIn1 is a read data pin, the WireOut1 is a write data pin, the WirePu1 pull-up drive pin and the WirePd1 pull-down drive pin. The 74hc1g125gv chip provides a non-inverting buffer line driver that assumes a high impedance state off state; a WirePu1 pull-up pin which is connected with an SS8050LT1_ NPN chip to amplify a weak signal into an electrical signal with a higher amplitude value, so as to play a role in amplifying current; a WirecaPd 1 pull-down pin which is also connected with an SS8050LT1_ NPN chip; the Wireout1 output pin is connected with the S9012_ sot23 chip and plays a role of a protection circuit, and when 1N4148 and SS14 are subjected to reverse breakdown, high reverse electromotive force can be generated to protect components in the circuit; and the dp1 is a data pin connected with the cable and used for writing one-wire instructions and reading detection data. When the processor carries out reading operation, firstly, the WirePd1 is opened, the dp1 outputs a low level signal, then the WirePd1 is closed, the WirePu1 is opened, the dp1 outputs a high level signal, and finally the WirePu1 is closed, so that a short rising edge pulse is generated on the bus dp1, the device mounted under the driving circuit replies the current data bit state through a one-wire response mechanism, and the processor replies a response signal by reading the current WireIn1 state, thereby completing the data bit reading operation. When the processor carries out writing operation, firstly, the WirePd1 is opened, the dp1 outputs a low level signal, then the WirePd1 is closed, when 1 is written, the WirePu1 is opened, the dp1 outputs a high level signal, and finally the WirePu1 is closed, so that a short rising edge pulse is generated on the bus dp 1; when 0 is written, the WirePd1 is continuously opened, the dp1 outputs a low level signal for a long time, then the WirePd1 is closed, finally the WirePu1 is continuously opened, the dp1 outputs a high level signal, then the WirePu1 is closed, the device mounted under the driving circuit replies the current data bit state through a one-wire response mechanism, and the processor completes the data bit writing operation through the WireOut 1.
Referring to fig. 3 and 4, the isolation protection circuit is disposed between the temperature and humidity measurement and control circuit and the measurement and control cable. In the present embodiment, the isolation protection circuit includes a DS2413 chip. A data input pin of the DS2413 chip is connected with a data pin of the temperature and humidity measurement and control circuit, and a grounding pin of the DS2413 chip is connected with a grounding pin of the temperature and humidity measurement and control circuit. The processor selects the working mode of the DS2413 chip through the write-in response signal, and the PIOA pin of the DS2413 chip is connected with the ground wire of the measurement and control cable. And a data wire of the measurement and control cable is connected with a data pin of the temperature and humidity measurement and control circuit.
In this embodiment, the data input pins Dp and GND of the chip DS2413 are electrically connected to the data input pins Dp1 and GND of the temperature and humidity measurement and control circuit module, respectively, and the processor selects the operating mode of the chip DS2413 by writing the one-wire response signal and outputs a corresponding level signal through the pinoa pin. The PIOA pin of the DS2413 chip is electrically connected with the cable GND, and is used for controlling the on-off of the electrical connection between the acquisition board GND and the cable GND and serving as a hardware switch for the electrical connection of the cable. The DATA of the measurement and control cable is electrically connected with a DATA input pin of the temperature and humidity measurement and control circuit module, when measurement and control are needed, the processor writes in one-wire response signals through the port, the electrical connection between the measurement and control cable and the temperature and humidity measurement and control circuit module is opened, and then a measurement and control instruction is sent to conduct DATA acquisition. After the collection is completed, the processor writes in one-wire response signals again through the port, and the electrical connection between the measurement and control cable and the temperature and humidity measurement and control circuit module is disconnected, so that the measurement and control cable is protected, and the risk of burning the measurement and control cable when the equipment works abnormally is reduced.
The communication module is used for receiving a configuration instruction and a measurement and control instruction sent by a cloud server. The processor is connected to the cloud server through the communication module, and recognizes and executes the measurement and control instruction issued by the cloud server to acquire the measurement and control data of the environmental information. The processor identifies the state of the measurement and control cable on line according to the measurement and control data, acquires the dead pixel position of at least one sensor, and reports the corresponding dead pixel position to a remote server or directly uploads the dead pixel position to a cloud terminal through a cloud host. The communication module comprises an electrostatic protection circuit, a wired communication unit and a wireless communication unit. The wired communication unit is used for the processor to carry out wired communication with the cloud server. The wireless communication unit is used for the processor to carry out wireless communication with the cloud server. Wireless communication uses the loRa radio frequency module as an example, and loRa radio frequency module SX1278 passes through the gateway and uploads data to the cloud server, and effective communication distance can reach 5 kilometers, can solve the difficult problem of on-the-spot wiring, reduce the cost simultaneously. The communication module is a communication bridge between the cloud server and the acquisition board, and comprises the steps that the cloud server issues acquisition and configuration instructions and temperature and humidity uploading data. The circuit design adopts the combination of a balanced driver and a differential receiver, so that the anti-interference capability is greatly enhanced, the communication distance and the application range are effectively expanded, and the multi-point and two-way communication capability is realized. The design of the electrostatic protection circuit can effectively prevent the sensor from working due to the fact that static electricity is generated to cause disorder inside the sensor, and the electrostatic protection ensures the effectiveness and accuracy of data. Certainly, the communication mode of the communication module can also be wired 485, optical fiber or wireless radio frequency, but is not limited to the above mode, the interface conversion is performed through a serial port, and the communication module is compatible with diversified measurement and control scenes. The communication module and the processor can communicate in a serial communication mode.
In this embodiment, the communication module is mainly used for data interaction between the detection device and the cloud host in this embodiment, receives a configuration instruction and a measurement and control instruction issued by the cloud server, and uploads measurement and control data of the detection device. The communication module is provided with a three-wire system USART serial communication port and a four-wire system SPI communication port, wherein the three-wire system USART serial communication port can be used for on-site measurement and control of RS232 of short-distance transmission, RS485 of medium-long distance and optical fiber transmission of original distance, and the communication module is suitable for various low-speed measurement and control scenes. The SPI communication port can realize high-speed transmission of medium and long distances through Ethernet, optical fibers, wireless communication modules and the like.
The power supply module is used for rectifying and stabilizing external input voltage through the internal voltage stabilizer to output direct current voltage, converting the direct current voltage through a linear voltage stabilizer and then supplying the converted direct current voltage to the temperature and humidity measurement and control circuit and the detection device, and converting the direct current voltage through a power supply voltage stabilizer and then supplying the converted direct current voltage to the processor. In this embodiment, the power module is powered by dc 5V, performs rectification and voltage stabilization operations on the input voltage through the voltage stabilizer, outputs the dc voltage, and converts the dc voltage through the linear LDO to output stable dc 5V to the measurement and control device. The power supply voltage stabilizer stably outputs 3.3V voltage to supply power to the microprocessor, in the circuit design of the power supply module, the input capacitor can effectively prevent the voltage inversion phenomenon after power failure, and the filter capacitor can play the roles of restraining self-oscillation and stabilizing output voltage.
The number identification module is electrically connected with the processor and is used for identifying the number of the detection device. The number identification module can be convenient for the outside, especially the serial number of the cloud server identification detection device, and can accurately encode the information of the detection device. Like this, when the space in granary is very big, when detection device's quantity is more, serial number identification module can regard as detection device's ID card for the data that detect accurately collect in background or cloud ware, so that manage.
The input and output ends of the processor are connected with the data reading pin, the data writing pin, the pull-up driving pin and the pull-down driving pin. The processor is an STM32 microprocessor, consists of an STM32 series single chip microcomputer with a Cortex-M3 as an inner core and a peripheral circuit, has the characteristics of high performance, low cost and low power consumption, and is suitable for field environment data acquisition and processing, data communication and equipment regulation.
When reading, the processor firstly opens the pull-down driving pin, the data pin outputs a low level signal through the current amplification module II, then closes the pull-down driving pin and opens the pull-up driving pin, the data pin outputs a high level signal through the current amplification module I, and finally closes the pull-up driving pin, so that the data pin generates a rising edge pulse to the detection device, the detection device replies the current data bit state, and the processor replies a response signal through reading the state of the data reading pin, so that the data bit reading operation is realized.
When writing operation is carried out, the processor firstly opens the pull-down driving pin, the data pin outputs a low level signal through the current amplification module II, then the pull-down driving pin is closed, and finally: (1) when writing 1, the pull-up driving pin is opened, the data pin outputs a high level signal through the first current amplification module, and finally the pull-up driving pin is closed, so that the data pin generates a rising edge pulse to the detection device. (2) When 0 is written in, the pull-down driving pin is continuously opened, the data pin continuously outputs a low level signal through the current amplification module II, then the pull-down driving pin is closed, finally the pull-up driving pin is opened, the data pin outputs a high level signal through the current amplification module I, then the pull-up driving pin is closed, the detection device replies the current data bit state, and the processor realizes data bit writing operation through the data reading pin.
In order to improve the working efficiency of the measuring and controlling device of the embodiment, the optimized design is carried out on a measuring and controlling mechanism, an acquisition mode, a data processing method and a system operation mechanism, so that software and hardware of the detecting device of the embodiment run coordinately, and the integral working efficiency of the device is improved. The measurement and control device of the embodiment gets rid of a single-thread measurement and control mechanism of a traditional measurement and control unit in terms of processing of the measurement and control mechanism, the measurement and control mechanism of the processor adopts a time division multiplexing mode for multi-path parallel acquisition, an independent task thread is established for tasks required to be executed by each acquisition port, and each thread executes tasks in a task queue. The processor distributes resources of each thread according to the overall load capacity of the system, controls the multiple threads to synchronously and coordinately operate until all the tasks in the thread task queues are completed, ends the acquisition task, and finally uploads the acquired data to the cloud host or the cloud end through the communication module after processing. The average effective time of single-path measurement and control can be shortened by operating the optimization processing of the measurement and control mechanism, and the real-time efficiency of measurement and control is improved.
The detection device of the embodiment is compatible with two modes of real-time acquisition and timed uploading in the design of the acquisition module. And in the real-time mode, real-time data acquisition and uploading are carried out by responding to a measurement and control instruction from the cloud host or the cloud server in real time. Under the timing mode, environmental data are collected at regular time and stored locally, a measurement and control instruction from a cloud host or a cloud server is responded, instruction reply is immediately carried out, and timeliness is higher. The real-time and timing temperature measurement modes can be modified and confirmed through configuration instructions so as to adapt to measurement and control requirements in different environments.
The data processing mechanism of the processor is to carry out sequencing processing according to the root layer number of the detection device on the measurement and control cable, when the site of the detection device corresponding point positioning requirement exists, the root layer information data of the detection device is configured by utilizing two self-defined fields, the position of the detection device is rapidly positioned according to the root layer information data during acquisition, and the position and the type of a fault point are rapidly positioned by a data filtering method. The processor automatically supplements a dead pixel according to the continuity of the root layer number. Taking a traditional temperature measuring DS18B20 temperature sensor as an example, in a field with a positioning requirement of a corresponding point of the sensor, two fields customized by a user are used for configuring root layer information data of the sensor, the position of the sensor is rapidly positioned according to the root layer information during acquisition, and the position and the type of a fault point can be rapidly positioned by a data filtering method. According to the continuity of the root layer number, the dead pixels are automatically supplemented to ensure the continuity of data, and when the dead pixels appear, the quick positioning and fault removal can be realized according to the uploaded dead pixel positions and the number.
The system operation mechanism of the processor is a watchdog mechanism of an independent window, and the testing task is backed up and stored in real time. Therefore, the equipment can be prevented from crashing, and the measurement and control task can be continuously executed when the equipment is abnormally restarted by a mode of testing the real-time backup and storage of the task. The watchdog of the independent window keeps a monitoring state at the moment when the system runs, so that the condition that the system enters a dead loop or a CPU (central processing unit) occupies a long-term state due to the fact that a certain thread is blocked can be avoided. Meanwhile, the system backs up the measurement and control task and the running state of the current system in real time during running so as to avoid that the system can quickly recover work during abnormal restarting and ensure the continuous effectiveness and the stability of the running of the system.
In conclusion, the device for collecting and detecting the temperature and humidity inside and outside the granary has the following advantages:
1. this detection device is gathered to inside and outside humiture of granary, its each module and pin through humiture measurement and control circuit realize the mechanism of read-write separation. During reading operation, the processor firstly opens the pull-down driving pin and then opens the pull-up driving pin to generate a rising pulse on the data pin, and the detection device replies the current data bit state, so that the processor replies a response signal by reading the state of the data reading pin to realize data bit reading operation. During writing operation, the processor firstly opens the pull-down driving pin to generate a low level signal, then closes the pull-down driving pin, controls the pull-up driving pin and the pull-down driving pin according to different writing-in conditions to generate a level signal with corresponding requirements, and finally the detection device replies the current data bit state to realize data bit writing operation through the data reading pin. Due to the fact that the multi-channel parallel acquisition is carried out in a time division multiplexing mode in the processing of the measurement and control mechanism, adjustment of different driving states is carried out aiming at data reading and writing, the reliability of data communication is improved, the load capacity of the temperature and humidity measurement and control circuit module is improved, the average effective time of single-channel measurement and control is shortened, and the real-time efficiency of measurement and control is improved. The device improves the transmission distance of serial data through the mode that multistage drive is enlargied, can increase the upper limit of single track mount sensor number, enlarges single track measurement and control cable coverage, reduces and observes and controls the detection convergent point, improves data communication's reliability, has reduced equipment cost.
2. This detection device is gathered to inside and outside humiture of granary, it has the isolation protection circuit to design between its humiture measurement and control circuit and the measurement and control cable, and the isolation protection circuit breaks off the public ground long-time connection of humiture measurement and control circuit and measurement and control cable, avoids measuring and control cable on the sensor continuous operation to reduce the spoilage, play the effect of protection measurement and control cable, can reduce the risk that equipment burns out the measurement and control cable when work is unusual.
3. The grain bin internal and external temperature and humidity acquisition and detection device breaks away from a traditional single-thread measurement and control mechanism of a measurement and control unit in the aspect of processing of the measurement and control mechanism, an independent task thread is established for tasks to be executed by each acquisition port by adopting a time division multiplexing idea, each thread executes tasks in a task queue, each thread resource is distributed by a CPU according to the overall load capacity of a system, a plurality of threads are controlled to synchronously and coordinately run until the tasks in all the thread task queues are completed, the acquisition task is finished, and the acquired data is uploaded to a cloud host or a cloud end through an interface communication module after being processed. The device can shorten the average effective time of single-path measurement and control through the optimization processing of the operation measurement and control mechanism, and improve the real-time efficiency of measurement and control.
4. The device for collecting and detecting the temperature and humidity inside and outside the granary is compatible with two modes of real-time collection and timed uploading in the design of a collection module. In a real-time mode, real-time data acquisition and uploading are carried out by responding to a measurement and control instruction from a cloud host or a cloud server in real time; under the timing mode, environmental data are collected at regular time and stored locally, a measurement and control instruction from a cloud host or a cloud server is responded, instruction reply is immediately carried out, and timeliness is higher. The real-time and timing temperature measurement modes can be modified and confirmed through configuration instructions so as to adapt to measurement and control requirements in different environments.
5. This detection device is gathered to inside and outside humiture of granary, it can be according to customer's demand, carries out the sequencing processing to the detection device root layer serial number in the measurement and control cable on data processing's mechanism. In the field with the positioning requirement of the corresponding point of the detection device, the two fields customized by a user are used for configuring the root layer information data of the detection device, the position of the detection device is quickly positioned according to the root layer information during acquisition, and the position and the type of a fault point can be quickly positioned by a data filtering method. According to the continuity of the root layer number of the detection device, the dead pixel is automatically supplemented to ensure the continuity of data, and when the dead pixel occurs, the quick positioning and fault removal can be realized according to the uploaded dead pixel positions and the number.
6. The device for collecting and detecting the temperature and humidity inside and outside the granary has the advantages that the device is prevented from being halted through a watchdog mechanism of an independent window in the system operation mechanism, and the measurement and control task can be continuously executed when the device is abnormally restarted through a test task real-time backup storage mode. The watchdog of the independent window keeps a monitoring state at the moment when the system runs, so that the condition that the system enters a dead loop or a CPU (central processing unit) occupies a long-term state due to the fact that a certain thread is blocked can be avoided. Meanwhile, the system backs up the measurement and control task and the running state of the current system in real time during running so as to avoid that the system can quickly recover work during abnormal restarting and ensure the continuous effectiveness and the stability of the running of the system.
7. The device for collecting and detecting the temperature and humidity inside and outside the granary uses an industrial grade single chip microcomputer with high processing rate as a core control unit, and can effectively ensure the operation processing speed, the anti-interference performance and the stability of an on-site measurement and control system; by adopting the modular design scheme, the universality, the stability and the transportability of the device are enhanced, and the device can be suitable for diversified temperature and humidity measurement and control environments in actual production.
Example 2
The embodiment provides a method for collecting and detecting the internal and external temperatures and humidities of a granary, and the method is applied to the device for collecting and detecting the internal and external temperatures and humidities of the granary in the embodiment 1. The detection method comprises the following steps:
when reading operation is carried out, firstly, a pull-down driving pin is opened, a data pin outputs a low level signal through a current amplification module II, then, the pull-down driving pin is closed, a pull-up driving pin is opened, a data pin outputs a high level signal through the current amplification module I, finally, the pull-up driving pin is closed, the data pin generates a rising edge pulse to a detection device, the detection device replies the current data bit state, and a processor replies a response signal through reading the state of a data reading pin to realize data bit reading operation;
when writing operation is carried out, the pull-down driving pin is firstly opened, the data pin outputs a low level signal through the current amplification module II, then the pull-down driving pin is closed, and finally: (1) when writing in1, opening a pull-up driving pin, enabling a data pin to output a high level signal through a first current amplification module, and finally closing the pull-up driving pin to enable the data pin to generate a rising edge pulse to a detection device; (2) when 0 is written in, the pull-down driving pin is continuously opened, the data pin continuously outputs a low level signal through the current amplification module II, then the pull-down driving pin is closed, finally the pull-up driving pin is opened, the data pin outputs a high level signal through the current amplification module I, then the pull-up driving pin is closed, the detection device replies the current data bit state, and data bit writing operation is realized through the data reading pin.
Example 3
The present embodiments provide a computer terminal comprising a memory, a processor, and a computer program stored on the memory and executable on the processor. And the processor executes the program to realize the steps of the method for acquiring and detecting the temperature and humidity inside and outside the granary in the embodiment 2. When the method in embodiment 2 is applied, the method can be applied in a software form, for example, a program designed to run independently is installed on a computer terminal, and the computer terminal can be a computer, a smart phone, a control system, other internet of things equipment, and the like. The method of embodiment 2 may also be designed as an embedded running program, and installed on a computer terminal, such as a single chip microcomputer.
Example 4
The present embodiment provides a computer-readable storage medium having a computer program stored thereon. When the program is executed by the processor, the steps of the method for acquiring and detecting the internal and external humiture of the granary in embodiment 2 are realized. When the method of embodiment 2 is applied, the method may be applied in the form of software, such as a program designed to be independently run by a computer-readable storage medium, which may be a usb disk designed as a usb shield, and the usb disk is designed to be a program for starting the whole method through external triggering.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.
Claims (10)
1. The utility model provides a detection device is gathered to inside and outside humiture of granary which characterized in that, it includes:
a plurality of detection devices;
the detection device comprises a measurement and control cable, a plurality of detection devices and a plurality of detection devices, wherein the plurality of detection devices are mounted on the measurement and control cable;
the temperature and humidity measurement and control circuit comprises a data reading pin, a data writing pin, a pull-up driving pin, a pull-down driving pin, a data pin, a non-inverting buffer circuit driving module, a current amplification module I, a circuit protection module and a current amplification module II; the data reading pin is connected with the output end of the non-inverting buffer circuit driving module, the data writing pin is connected with the input end of the circuit protection module, the pull-up driving pin is connected with the input end of the first current amplification module, and the pull-down driving pin is connected with the input end of the second current amplification module; the write data pin is connected with the input end of the non-inverting buffer circuit driving module, the output end of the first current amplification module, the output end of the circuit protection module and the output end of the second current amplification module; the measurement and control cable is connected with the data pin; and
the input and output ends of the processor are connected with the read data pin, the write data pin, the pull-up driving pin and the pull-down driving pin; when reading, the processor firstly opens the pull-down driving pin, enables the data pin to output a low level signal through the current amplification module II, then closes the pull-down driving pin and opens the pull-up driving pin, enables the data pin to output a high level signal through the current amplification module I, and finally closes the pull-up driving pin, enables the data pin to generate a rising edge pulse to the detection device, the detection device replies the current data bit state, and the processor replies a response signal through reading the state of the data reading pin, so as to realize data bit reading; when writing operation is carried out, the processor firstly opens the pull-down driving pin, the data pin outputs a low level signal through the current amplification module II, then the pull-down driving pin is closed, and finally: (1) when writing 1, opening the pull-up driving pin, enabling the data pin to output a high level signal through the first current amplification module, and finally closing the pull-up driving pin to enable the data pin to generate a rising edge pulse to the detection device; (2) when 0 is written in, the pull-down driving pin is continuously opened, the data pin continuously outputs a low level signal through the current amplification module II, then the pull-down driving pin is closed, finally the pull-up driving pin is opened, the data pin outputs a high level signal through the current amplification module I, then the pull-up driving pin is closed, the detection device replies the current data bit state, and the processor realizes data bit writing operation through the data reading pin.
2. The device for collecting and detecting the temperature and humidity inside and outside the granary according to claim 1, wherein the detection device further comprises:
and the isolation protection circuit is arranged between the temperature and humidity measurement and control circuit and the measurement and control cable.
3. The device for collecting and detecting the temperature and humidity inside and outside the granary according to claim 2, wherein the isolation protection circuit comprises a DS2413 chip; a data input pin of the DS2413 chip is connected with a data pin of the temperature and humidity measurement and control circuit, and a grounding pin of the DS2413 chip is connected with a grounding pin of the temperature and humidity measurement and control circuit; the processor selects the working mode of the DS2413 chip through a write-in response signal, and a PIOA pin of the DS2413 chip is connected with a ground wire of the measurement and control cable; and the data wire of the measurement and control cable is connected with the data pin of the temperature and humidity measurement and control circuit.
4. The device for collecting and detecting the temperature and humidity inside and outside the granary according to claim 1, wherein the detection device further comprises:
the communication module is used for receiving a configuration instruction and a measurement and control instruction sent by a cloud server; the processor is accessed to the cloud server through the communication module, and identifies and executes a measurement and control instruction issued by the cloud server to acquire environmental information, measure and control data; the processor identifies the state of the measurement and control cable on line according to the measurement and control data, acquires the dead pixel position of at least one sensor, and reports the corresponding dead pixel position to a remote server or directly uploads the dead pixel position to a cloud terminal through a cloud host.
5. The device for collecting and detecting the temperature and humidity inside and outside the granary according to claim 4, wherein the communication module comprises a wired communication unit and a wireless communication unit; the wired communication unit is used for the processor to perform wired communication with the cloud server; the wireless communication unit is used for the processor to perform wireless communication with the cloud server.
6. The device for collecting and detecting the temperature and humidity inside and outside the granary according to claim 1, wherein the detection device further comprises:
and the power supply module is used for rectifying and stabilizing external input voltage through an internal voltage stabilizer so as to output direct current voltage, supplying the direct current voltage after conversion to the temperature and humidity measurement and control circuit and the detection device through a linear voltage stabilizer, and supplying the direct current voltage after conversion to the processor through a power supply voltage stabilizer.
7. The device for collecting and detecting the temperature and humidity inside and outside the granary according to claim 1, wherein the detection device further comprises:
and the number identification module is electrically connected with the processor and is used for identifying the number of the detection device.
8. The device for collecting and detecting the temperature and humidity inside and outside the granary according to claim 1, wherein a measurement and control mechanism of the processor adopts a time division multiplexing mode for multi-path parallel collection, an independent task thread is established for tasks required to be executed by each collection port, and each thread executes tasks in a task queue; the processor distributes resources of each thread according to the overall load capacity of the system, controls the multiple threads to synchronously and coordinately run until all tasks in the thread task queue are completed, ends the acquisition task, and uploads the acquired data to the cloud host or the cloud end through the communication module after processing the acquired data; the data processing mechanism of the processor is to carry out sequencing processing according to the root layer number of a detection device on the measurement and control cable, when the site with the positioning requirement of a corresponding point of the detection device is on, the root layer information data of the detection device is configured by utilizing two self-defined fields, the position of the detection device is rapidly positioned according to the root layer information data during acquisition, and the position and the type of a fault point are rapidly positioned by a data filtering method; the processor automatically supplements a dead pixel according to the continuity of the root layer number; and the system operation mechanism of the processor is a watchdog mechanism of an independent window, and the test task is backed up and stored in real time.
9. The device for collecting and detecting the temperature and humidity inside and outside the granary according to claim 4, wherein the communication module is provided with a three-wire USART serial communication port and a four-wire SPI communication port, the processor is an STM32 microprocessor, the non-inverting buffer line driving module is a 74hc1g125gv chip, the first current amplification module and the second current amplification module are SS8050LT1_ NPN chips, and the circuit protection module is an S9012_ sot23 chip.
10. A method for collecting and detecting the temperature and humidity inside and outside a granary, which is applied to the device for collecting and detecting the temperature and humidity inside and outside the granary according to any one of claims 1 to 9, and which comprises the following steps:
when reading operation is carried out, firstly opening the pull-down driving pin, enabling the data pin to output a low level signal through the current amplification module II, then closing the pull-down driving pin and opening the pull-up driving pin, enabling the data pin to output a high level signal through the current amplification module I, and finally closing the pull-up driving pin, enabling the data pin to generate a rising edge pulse to the detection device, enabling the detection device to reply the current data bit state, and enabling the processor to reply a response signal through reading the state of the data reading pin to realize data bit reading operation;
when writing operation is carried out, the pull-down driving pin is firstly opened, the data pin outputs a low level signal through the current amplification module II, then the pull-down driving pin is closed, and finally: (1) when writing 1, opening the pull-up driving pin, enabling the data pin to output a high level signal through the first current amplification module, and finally closing the pull-up driving pin to enable the data pin to generate a rising edge pulse to the detection device; (2) when 0 is written in, the pull-down driving pin is continuously opened, the data pin continuously outputs a low level signal through the current amplification module II, then the pull-down driving pin is closed, finally the pull-up driving pin is opened, the data pin outputs a high level signal through the current amplification module I, then the pull-up driving pin is closed, the detection device replies the current data bit state, and data bit writing operation is realized through the data reading pin.
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