CN113284332B - Mining wireless sensing terminal - Google Patents
Mining wireless sensing terminal Download PDFInfo
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- CN113284332B CN113284332B CN202110413319.7A CN202110413319A CN113284332B CN 113284332 B CN113284332 B CN 113284332B CN 202110413319 A CN202110413319 A CN 202110413319A CN 113284332 B CN113284332 B CN 113284332B
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- G—PHYSICS
- G08—SIGNALLING
- G08C—TRANSMISSION SYSTEMS FOR MEASURED VALUES, CONTROL OR SIMILAR SIGNALS
- G08C17/00—Arrangements for transmitting signals characterised by the use of a wireless electrical link
- G08C17/02—Arrangements for transmitting signals characterised by the use of a wireless electrical link using a radio link
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- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
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Abstract
The invention relates to a mining wireless sensing terminal, which comprises: a power supply unit; the energy buffer unit is used for carrying out buffer control on the output current of the power supply unit so as to output stable power supply voltage to a terminal load; the sensor acquisition unit is used for acquiring the detection information of the sensor; a wireless communication unit for establishing a wireless communication connection between the terminal and the outside; the electric quantity monitoring unit is used for monitoring the energy storage electric quantity of the energy buffer unit; and the control unit acquires the detection information of the sensor in a periodic working mode, initiates wireless communication in an active reporting mode so as to control the terminal to enter a low power consumption mode in an intermittent period and judges whether to delay the work of the sensor acquisition unit and the wireless communication unit according to the energy storage electric quantity. According to the invention, through energy buffering and optimization control, the amplitude of the power supply current demand can be reduced, the static power consumption is reduced, the operation power consumption is reduced, the power consumption of the whole life cycle is reduced, the low-energy-consumption operation is realized, and the service life is prolonged.
Description
Technical Field
The invention relates to the technical field of wireless sensing, in particular to a mining wireless sensing terminal.
Background
At present, the construction and application of the internet of things are being promoted in various industries or fields such as intelligent meter reading, logistics monitoring, intelligent agriculture, forestry, animal husbandry, fishery, intelligent wearing, smart cities, industrial control and the like. The sensing terminals of the Internet of things provide real-time information acquisition and receiving system platform instructions, and the system platform collects data uploaded by the sensing terminals and issues control instructions, so that data support is provided for production and application of the industry.
In the field of industrial application, the sensing terminal is often used in working scenes with severe working conditions, difficult wiring, few monitoring points and high wiring cost, for example, in the working environment of mining, on-site personnel and vehicles frequently move, due to activities such as construction and operation, the problems of high installation difficulty, high construction cost, long period and the like caused by adoption of wired devices such as power cables and communication cables are frequently caused, and the conditions such as damage of equipment lines, impact of external force on equipment, network breaking and power failure during use often occur, so that the sensing terminal is abnormal and the reliable operation of an internet of things system cannot be guaranteed. Therefore, the sensing terminal of the internet of things is used as a front-end key node of the application of the internet of things, the reliability and energy consumption problems of the sensing terminal of the internet of things directly influence the stability and control effectiveness of the system, and the construction and maintenance cost of the system is directly related.
Disclosure of Invention
The present application is made based on the recognition and study of the following problems by the inventors:
in the related art, no matter the low-power consumption state monitoring equipment or the low-power consumption power supply module, the problem of high self static power consumption cannot be solved, the output current of the battery is not buffered or protected, the service life of the battery is obviously shortened due to the large current output of the battery, the maintenance-free period of the device is shortened due to the service life reduction of the battery, meanwhile, the quality of wireless communication signals is not detected, invalid operation power consumption can be generated when the signal quality is poor or the communication fails, and the valid operation power consumption is higher due to the fact that the wireless communication power consumption is higher. In addition, invalid power consumption can be consumed in non-operation states such as transportation, storage, installation and the like, so that the power consumption of the whole life cycle of the terminal is higher, and the operation cycle is greatly shortened.
Technical problem to be solved
In view of the defects and shortcomings of the technology, the invention provides the mining wireless sensing terminal, which can reduce the magnitude of the power supply current demand, reduce static power consumption, reduce operation power consumption, realize the power consumption of the whole life cycle, realize low-energy-consumption operation, prolong the service life and solve the technical problems of high cost of terminal construction and maintenance and difficulty in guaranteeing the reliable operation of terminal data in severe environment through energy buffering and optimal control.
(II) technical scheme
In order to achieve the purpose, the invention adopts the main technical scheme that:
the embodiment of the invention provides a mining wireless sensing terminal, which comprises: a power supply unit; the energy buffer unit is connected with the power supply unit and is used for carrying out buffer control on the output current of the power supply unit so as to output stable power supply voltage to a terminal load; the sensor acquisition unit is used for acquiring sensor detection information; the wireless communication unit is used for establishing external communication connection of the mining wireless sensing terminal; the electric quantity monitoring unit is used for monitoring the stored energy electric quantity of the energy buffer unit; the control unit is respectively connected with the sensor acquisition unit, the wireless communication unit and the electric quantity monitoring unit, acquires the detection information of the sensor in a periodic working mode, initiates wireless communication in an active reporting mode so as to control the terminal to enter a low power consumption mode in an intermittent period, and judges whether to delay the acquisition work of the sensor acquisition unit and the communication work of the wireless communication unit according to the stored energy electric quantity of the energy buffer unit.
The mining wireless sensing terminal provided by the embodiment of the invention provides stable power supply voltage for a load by adding the energy buffer unit between the power supply unit and the load circuit, avoids the load from directly drawing large current from a power supply to reduce the performance of an internal battery, thereby prolonging the service life of the internal battery, and the control unit adopts a periodic working mode to collect the detection information of the sensor and initiates wireless communication in an active reporting mode, thereby enabling the terminal to enter a low power consumption mode in an intermittent period, greatly reducing the operation power consumption, simultaneously adopts an interval and delay execution mode to avoid the load from continuously drawing large current or excessively drawing current from the energy buffer unit to indirectly increase the load of the power supply and reduce the performance of the internal battery, thereby prolonging the service life of the battery, the low energy consumption operation is realized, and the service cycle is prolonged.
Alternatively, in accordance with one embodiment of the present invention,
the energy buffer unit comprises an energy storage component and a voltage conversion circuit,
the energy storage electric quantity range of the energy buffer unit is 2-18 joules, when the output power of the power supply unit is lower than 0.3 watt, the maximum output power of the energy buffer unit is not lower than 0.3 watt,
when the power supply unit does not output current, the energy buffer unit continuously outputs electric quantity not lower than 0.05 joule;
when the power supply unit supplies power normally or abnormally, the energy buffer unit at least provides instantaneous power of not less than 0.3 watt or continuous electric quantity of not less than 0.05 joule for one of the control unit, the wireless communication unit and the sensor acquisition unit;
the power supply unit abnormality includes one of no output current, small output current and unstable output power of the power supply unit.
Alternatively, the first and second electrodes may be,
the energy buffer unit comprises a voltage monitoring chip and an energy storage assembly, wherein the energy buffer unit is automatically switched to a large-impedance current channel (namely, a current buffer channel) when the voltage monitoring chip monitors that the input pressure difference between the power supply unit and the energy storage assembly is greater than a preset voltage threshold value, and is automatically switched to a small-impedance current channel when the voltage monitoring chip monitors that the input pressure difference between the power supply unit and the energy storage assembly is less than or equal to the preset voltage threshold value, so that the power supply can continuously and stably output under different working conditions.
Optionally, the energy buffer unit further includes a voltage monitoring circuit, a switching circuit, and a current limiting resistor;
the voltage monitoring circuit, the switch circuit and the current limiting resistor form a current buffer channel,
the energy buffer unit comprises 2 current buffer channels and corresponding preset voltage thresholds, the preset voltage threshold range is 2.5-6V, when the voltage monitoring circuit monitors that the input voltage difference between the power supply unit and the energy storage assembly is larger than the preset voltage threshold, the energy buffer unit is automatically switched to a first current buffer channel through a switching circuit, and when the voltage monitoring circuit monitors that the input voltage difference between the power supply unit and the energy storage assembly is smaller than or equal to the preset voltage threshold, the energy buffer unit is automatically switched to a second current buffer channel through the switching circuit, and the energy buffer unit controls the power supply unit to output current in a range of 3 mA-70 mA under different working conditions through the automatically switched current buffer channels;
the impedance of the second current buffer channel is less than the impedance of the first current buffer channel.
Optionally, according to an embodiment of the present invention, the mining wireless sensing terminal further includes a power management unit, where the power management unit is configured to control whether the energy buffering unit supplies power to the sensor acquisition unit and the wireless communication unit, and when the mining wireless sensing terminal operates in a low power consumption mode, the control unit turns off power supply to the sensor acquisition unit and/or the wireless communication unit through the power management unit.
Optionally, according to an embodiment of the present invention, when the control unit establishes the external communication connection of the mining wireless sensing terminal through the wireless communication unit, the control unit further obtains quality of a wireless communication signal, and controls a wireless communication time interval and/or a signal gain of the mining wireless sensing terminal according to the quality of the wireless communication signal.
Optionally, according to an embodiment of the present invention, the mining wireless sensing terminal further includes an external energy input unit, where the external energy input unit is connected to the energy buffer unit, and the external energy input unit is used to access an external power supply to supply power to the energy buffer unit.
Alternatively, the power supply unit includes an internal battery and/or an external energy input unit,
the external energy input unit is used for being connected with an external power supply, and the internal battery and the external energy input unit are connected with the energy buffer unit so as to supply power to the energy buffer unit.
Optionally, according to an embodiment of the present invention, the mining wireless sensing terminal further includes a human-computer interaction unit, the human-computer interaction unit is connected to the control unit, the control unit receives a switching instruction through the human-computer interaction unit to control the mining wireless sensing terminal to switch between a factory mode and an operation mode, where the mining wireless sensing terminal is in a completely silent state in the factory mode until the mining wireless sensing terminal is switched to the operation mode.
Optionally, according to an embodiment of the present invention, the operation modes include an active mode and a low power consumption mode, and the active mode and the low power consumption mode are switched to each other through an event trigger and an execution result.
Optionally, in accordance with an embodiment of the invention, the active mode comprises an interactive active mode periodic active mode. The control unit is also configured to,
acquiring the running state of the mining wireless sensing terminal, and judging that the mining wireless sensing terminal runs normally according to the running state of the mining wireless sensing terminal, and acquiring information detected by a sensor through a sensor acquisition unit;
when the preset energy buffer interval time is up, monitoring the quality of a wireless communication signal, externally sending information detected by the sensor and the running state of the mining wireless sensing terminal through the wireless communication unit, and controlling the mining wireless sensing terminal to enter a low power consumption mode when receiving an external response instruction through the wireless communication unit.
Alternatively, in accordance with one embodiment of the present invention,
the active modes comprise an interactive active mode and a periodic active mode, and when the mining wireless sensing terminal enters the periodic active mode, the control unit is further used for,
acquiring the running state of the mining wireless sensing terminal, and judging that the mining wireless sensing terminal runs normally according to the running state of the mining wireless sensing terminal, and acquiring information detected by a sensor through a sensor acquisition unit;
when the preset energy buffering interval time is up, monitoring the energy storage capacity of the energy buffering unit;
when the energy storage capacity of the energy buffer unit is smaller than a preset capacity threshold, controlling the energy buffer unit to perform energy storage delay, monitoring the quality of a wireless communication signal until the energy storage capacity of the energy buffer unit is larger than or equal to the preset capacity threshold, externally sending information detected by the sensor and the running state of the mining wireless sensing terminal through the wireless communication unit, and controlling the mining wireless sensing terminal to enter a low power consumption mode when an external response instruction is received through the wireless communication unit, wherein if the signal quality of wireless communication is poor and no response signal occurs after the information is sent out, the wireless communication period is automatically increased until the period is increased to the maximum value, or the wireless communication signal quality is recovered and the normal communication period is recovered after the response instruction is received.
That is to say, when the mining wireless sensing terminal enters a periodic active mode, the control unit is further configured to acquire an operating state of the mining wireless sensing terminal, and judge that the mining wireless sensing terminal operates normally according to the operating state of the mining wireless sensing terminal, and acquire sensor detection information through the sensor acquisition unit; according to the preset periodic energy buffering interval time, monitoring the energy storage capacity of the energy buffering unit in a delayed mode; when the energy storage capacity of the energy buffer unit is smaller than a preset capacity threshold, controlling the energy buffer unit to perform energy storage delay, monitoring the quality of a wireless communication signal until the energy storage capacity of the energy buffer unit is larger than or equal to the preset capacity threshold, externally sending the detection information of the sensor and the running state of the mining wireless sensing terminal through the wireless communication unit, and controlling the mining wireless sensing terminal to enter a low power consumption mode when an external response instruction is received through the wireless communication unit, wherein if the quality of the wireless communication signal is poor and no response signal occurs after the information is sent out, the wireless communication period is automatically increased until the period is increased to the maximum value, or the quality of the wireless communication signal is recovered and the normal communication period is recovered after the response instruction is received.
(III) advantageous effects
The invention has the beneficial effects that: the mining wireless sensing terminal provided by the embodiment of the invention has the advantages of simple structure and convenience in operation, greatly reduces the comprehensive energy consumption level, realizes low-energy-consumption operation, prolongs the service life of an internal battery by reducing the power supply current demand amplitude, reducing the standby power consumption, reducing the operation power consumption, reducing the full-life cycle power consumption and other processing modes, and can realize stable operation by using an external weak electric quantity conversion device or realize maintenance-free long-term operation by using an internal single battery, thereby prolonging the service life. Wherein:
(1) through increasing energy buffer unit between power supply unit and load circuit, realize that buffer circuit provides stable power supply voltage to the load, avoid the load directly to draw heavy current and reduce inside battery performance from inside battery or external power supply unit to promote inside battery life.
(2) The power management unit is arranged to realize two operation strategies of a low power consumption mode and an active mode of the terminal, the power management unit automatically turns off the power supplies of the sensor acquisition unit and the wireless communication unit in the low power consumption mode, only the microcontroller and the real-time clock are kept to work in low power consumption, and in the low power consumption mode, the state monitoring circuit and the key input circuit of the mining wireless sensing terminal operate in a low power consumption mode by adopting an interruption triggering mode, so that the power consumption in standby can be reduced.
(3) The invention adopts an energy buffer control strategy, namely, the control unit adopts a periodic working mode to collect the detection information of the sensor and initiates wireless communication in an active reporting mode, so that the terminal enters a low power consumption mode in an intermittent period, and adopts an interval and delay execution mode to detect the stored energy electric quantity of the energy buffer unit before execution, if the electric quantity is lower, the execution is delayed, thereby avoiding the load from continuously drawing large current or excessively drawing current from the energy buffer unit to indirectly increase the power supply burden and reduce the performance of an internal battery, further prolonging the service life of the internal battery and reducing the power consumption in working.
(4) The invention can realize stable operation by using an external weak electric quantity conversion device, or realize maintenance-free long-term operation by using an internal battery.
(5) When the mining wireless sensing terminal initiates wireless communication, the quality of a wireless communication signal is detected firstly, and a response confirmation mechanism is adopted during the wireless communication, if the quality of the wireless communication signal is poor and no response signal occurs continuously after the information is sent out, the wireless communication period is automatically increased until the wireless communication period is increased to the maximum period value or the signal quality is recovered and the normal communication period is recovered after the response is received, so that unnecessary energy consumption when the wireless communication is interfered or the network fails is reduced, and the power consumption of the mining wireless sensing terminal during working is reduced.
(6) The mining wireless sensing terminal supports a factory mode and an operation mode, the operation mode can be switched through key input, equipment is in a factory mode by default after leaving a factory, the mining wireless sensing terminal is in a completely silent state, and the mining wireless sensing terminal can be switched to the operation mode through keys after being put into use, so that unnecessary energy consumption in the transportation, storage and installation processes is reduced, and the whole life cycle power consumption of the mining wireless sensing terminal is reduced.
(7) The mining wireless sensing terminal can be installed and used in a wireless mode without accessing a power cable and a communication cable, the installation and maintenance difficulty is reduced, the efficiency is improved, the cost is reduced, and the risk of power supply interruption or communication interruption caused by activities such as construction and operation is reduced.
(8) The invention can greatly reduce the difficulty of construction and maintenance of the monitoring system, reduce the operation and maintenance cost, improve the production efficiency and ensure the reliable operation of safe production.
Drawings
FIG. 1 is a block schematic diagram of a mining wireless sensing terminal according to an embodiment of the invention;
FIG. 2 is a block diagram of a mining wireless sensing terminal according to one embodiment of the invention;
fig. 3 is a schematic diagram of an operation mode of a mining wireless sensing terminal according to an embodiment of the invention.
Detailed Description
For the purpose of better explaining the present invention and to facilitate understanding, the present invention will be described in detail by way of specific embodiments with reference to the accompanying drawings.
The mining wireless sensing terminal provided by the embodiment of the invention realizes that the energy buffer unit provides stable power supply voltage for a load by adding the energy buffer unit between the power supply unit and the load circuit, avoids the load from directly drawing large current from a power supply to reduce the performance of an internal battery, thereby prolonging the service life of the internal battery, and the control unit adopts a periodic working mode to collect the detection information of the sensor and initiates wireless communication by an active reporting mode, thereby leading the terminal to enter a low power consumption mode in an intermittent period, greatly reducing the operation power consumption, simultaneously adopts an interval and delayed execution mode to avoid the load from continuously drawing large current or excessively drawing current from the energy buffer unit to indirectly increase the load of the power supply and reduce the performance of the internal battery, thereby prolonging the service life of the internal battery, low energy consumption operation is realized, and the service cycle is prolonged. Therefore, the invention can greatly reduce the difficulty of construction and maintenance of the monitoring system, reduce the operation and maintenance cost, improve the production efficiency and ensure the reliable operation of safe production.
In order to better understand the above technical solutions, exemplary embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the invention are shown in the drawings, it should be understood that the invention can be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art.
The mining wireless sensing terminal provided by the embodiment of the invention is described below with reference to the attached drawings.
Fig. 1 is a block diagram of a mining wireless sensing terminal according to an embodiment of the invention. As shown in fig. 1, the mining wireless sensing terminal 100 includes a power supply unit 10, an energy buffer unit 20, a sensor acquisition unit 30, a wireless communication unit 40, a power monitoring unit 50 and a control unit 60.
The energy buffer unit 20 is connected to the power supply unit (e.g., an internal battery) 10, and the energy buffer unit 20 is configured to perform buffer control on an output current of the power supply unit 10 to output a stable supply voltage to a terminal load.
Alternatively, the power supply unit 10 may be a battery, wherein the battery may employ a small-sized, low-capacity lithium thionyl chloride battery having an open-circuit voltage of 3.6V in accordance with a safety requirement, such as a LS14500 type lithium thionyl chloride battery by SAFT.
In an embodiment of the present invention, the energy buffer unit 20 includes a voltage monitoring chip and an energy storage component, wherein when the energy buffer unit 20 monitors that the input voltage difference between the power supply unit and the energy storage component is greater than a preset voltage threshold value through the voltage monitoring chip, the energy buffer unit automatically switches to a high impedance current channel (i.e., a current buffer channel), and when the input voltage difference between the power supply unit and the energy storage component is monitored to be less than or equal to the preset voltage threshold value through the voltage monitoring chip, the energy buffer unit automatically switches to a low current channel, so that the power supply performs trickle output under different working conditions.
Specifically, the energy buffer unit 20 may include a farad capacitor, a resistor, a diode, an MOS transistor, and a voltage monitoring chip, for example, the farad capacitor and the current limiting resistor of 0.5F or 6V are used as an energy storage component, and the S-80850CNUA voltage monitoring chip, the 2 Ω current limiting resistor, and the MOS transistor SI2301 are used to form a current automatic switching channel when the input voltage difference is too large. Like this, when the too big condition of input pressure differential appears between power of power supply unit 10 and energy storage subassembly, automatic switch to big impedance current channel, when the input pressure differential appears between power of power supply unit 10 and energy storage subassembly and is in presetting the voltage threshold, automatic switch to little impedance current channel (be the current buffer channel), in order to guarantee that the power homoenergetic under different operating modes can stable output in succession, the realization provides stable supply voltage to the load, thereby through increase energy buffer unit between power and load circuit, realize that buffer circuit provides stable supply voltage to the load, avoid the load directly to draw the heavy current and reduce inside battery performance from inside battery or outside power supply unit, and then promote battery life.
In an embodiment of the present invention, the sensor acquisition unit 30 is used for acquiring sensor detection information.
The sensor acquisition unit 30 includes a power interface, a communication interface, an excitation circuit, and a sampling circuit, and is configured to generate a sensor excitation signal, acquire a sensor signal, and acquire sensor detection information. For example, a sine module is selected to realize the excitation and collection of the sine sensor, a serial interface and a communication protocol can be adopted to execute read instruction and write instruction operation on the module, and the detection information of the sensor is obtained according to a feedback protocol.
The wireless communication unit 40 is used to establish a wireless communication connection between the terminal and the outside. The wireless communication unit 40 may include a wireless communication module, an antenna matching circuit, and a power filter circuit, and is further configured to monitor the strength of the wireless communication signal, send data information to the outside, and receive an external control command. The wireless communication module can adopt a non-cellular network type module, such as an SX1276 type LoRa module or an AW516 Zigbee module of Semtech, the antenna matching circuit can adopt 1 resistor and 2 capacitors to form a pi-type matching circuit, and the power supply filter circuit can adopt a plurality of capacitors with different capacitance values to form the power supply filter circuit.
The power monitoring unit 50 is used for monitoring the stored energy power of the energy buffer unit 20. The power monitoring unit 50 may include a voltage divider and a voltage monitoring chip, and may be configured to collect the voltage of the energy storage element in the energy buffer unit 20 and evaluate the stored energy of the energy buffer unit 20. The voltage monitoring chip can be selected from BL8506-32, so that the voltage drop of the energy storage element is over-limit to trigger an alarm event, and the voltage dividing resistor is connected to the AD acquisition circuit, so that the electric quantity monitoring unit 50 can accurately acquire the energy storage electric quantity of the energy buffer unit 10.
As shown in fig. 1, the control unit 60 is connected to the sensor collecting unit 30, the wireless communication unit 40, and the power monitoring unit 50, respectively, and the control unit 60 collects the detection information of the sensor in a periodic working manner, and initiates wireless communication in an active reporting manner, so as to control the terminal to enter a low power consumption mode in an intermittent period, and determine whether to delay the collecting operation of the sensor collecting unit 30 and the communication operation of the wireless communication unit 40 according to the stored energy power of the energy buffering unit 20.
Wherein the control unit 60 may be a microcontroller, as shown in fig. 2. The microcontroller is used as a processor, is connected with each part through an analog-digital converter, a digital input/output interface and a bus interface, executes a control program, senses and collects data information through the sensor collecting unit 30, monitors the running state of the energy buffer unit such as the energy storage electric quantity through the electric quantity monitoring unit 50, controls the power supply of each part through the power management unit, monitors the quality of wireless communication signals through the wireless communication unit 40, and sends sensing information in an alignment mode and receives an external control instruction. In fig. 2, a circuit is shown, which is identical to the meaning of a cell.
Specifically, the microcontroller may adopt an MCU controller, such as STM32L031K6, which is internally equipped with 12 ADC channels, 1024-byte EEPROM, 32KB FLASH, independent watchdog, and real-time clock, and is configured with 1 IIC, 1 SPI, 2 UART buses and serial data interfaces, for completing operations of setting real-time, starting monitoring, responding to trigger events, executing power management, data storage, communication, and the like.
Therefore, in the embodiment of the present invention, the microcontroller adopts an energy buffer control strategy, that is, the microcontroller collects the detection information of the sensor in a periodic working mode and initiates wireless communication in an active reporting mode, so that the terminal enters a low power consumption mode in an intermittent period. And for operations with larger instantaneous power consumption, such as sensor acquisition and wireless communication, the stored energy electric quantity of the energy buffer unit is detected before execution in an interval and delay execution mode, if the electric quantity is lower, delay execution is carried out, and the phenomenon that a load continuously draws large current or excessively draws current from the energy buffer unit to indirectly increase the power supply load and reduce the performance of an internal battery is avoided, so that the service life of the internal battery is prolonged, and the power consumption of a terminal during working is reduced.
Optionally, in an embodiment of the present invention, as shown in fig. 2, the above-mentioned mining wireless sensing terminal further includes a power management unit (power management circuit) 70, where the power management unit 70 is configured to control whether the energy buffer unit 20 supplies power to the sensor acquisition unit (sensor acquisition circuit) 30 and the wireless communication unit 40, and when the terminal operates in the low power consumption mode, the control unit 60 turns off the power supply to the sensor acquisition unit 30 and the wireless communication unit 40 through the power management unit 70.
The power management unit comprises a voltage conversion circuit, a capacitor and an MOS (metal oxide semiconductor) tube and is used for providing a main power supply for the terminal and converting the power supply voltage into proper voltage required by each part so as to control the power supply of each part. For example, the voltage conversion circuit can be implemented by a low dropout regulator, such as HT7333, an input capacitor, and an output capacitor, and can ensure a stable output voltage of 3.3V and a maximum current of 250 mA.
In this embodiment, in the low power consumption mode, the power management unit 70 automatically turns off the power supplies of the sensor acquisition unit 30 and the wireless communication unit 40, and only the microcontroller and the real-time clock are kept in low power consumption operation. And in the low power consumption mode, the state monitoring circuit and the key input circuit of the terminal adopt an interrupt triggering mode and operate in a low power consumption mode, so that the power consumption of the terminal in standby is reduced.
As one embodiment, the control unit 60 also acquires the wireless communication signal quality when establishing the wireless communication connection between the terminal and the outside through the wireless communication unit 40, and controls the wireless communication cycle according to the wireless communication signal quality.
That is to say, when the mining wireless sensing terminal according to the embodiment of the present invention initiates wireless communication through the wireless communication unit (wireless communication circuit) 40, first, the quality of the wireless communication signal is detected, and a response confirmation mechanism is used during communication, and if the wireless communication signal quality is poor and no response signal is continuously generated after the information is sent out, the control unit 60 will automatically increase the wireless communication period until the wireless communication period reaches the maximum period value, or the signal quality recovers and a normal communication period is recovered after receiving a response, so that unnecessary energy consumption when the wireless communication is interfered or a network failure is reduced, and power consumption when the terminal is actively operating is reduced.
According to an embodiment of the present invention, as shown in fig. 2, the above-mentioned mining wireless sensing terminal further includes an external energy input unit (i.e. an external energy conversion device input circuit) 80, the external energy input unit 80 is connected to the sensor collecting circuit 30, and the external energy input unit 80 is used for accessing an external power source to supply power to the energy buffer unit (i.e. the energy buffer circuit) 20.
The external energy input unit 80 may include an external interface, a fuse, a diode, and a voltage regulator tube protection element, and is configured to be connected to an external power supply to provide electric energy for the energy buffer unit 20 and the power management unit (power management circuit) 70. For example, a current-limiting protection and input anti-reverse circuit can be formed by using a Schottky diode, a fuse, a current-limiting resistor and a voltage-stabilizing tube.
In the embodiment, the terminal does not need large-current output capacity for the power supply, so that the terminal can realize stable operation by using an external weak electric quantity conversion device, or can realize maintenance-free long-term operation by using an internal single lithium thionyl chloride battery.
Further, as shown in fig. 2, the above-mentioned mining wireless sensing terminal further includes a human-computer interaction unit 90, where the human-computer interaction unit 90 is connected to the control unit 60, and the control unit 60 receives a switching instruction through the human-computer interaction unit 90 to control the mining wireless sensing terminal to switch between a factory mode and an operation mode, where the terminal is in a completely silent state in the factory mode until being switched to the operation mode.
The human-computer interaction unit (human-computer interaction circuit) 90 includes an operation input circuit and an instruction output circuit. The operation input circuit can adopt a key, a resistor and a capacitor to form a key response circuit with a debouncing function, and can realize key value identification by matching with interrupt input of a microcontroller and timing of a timer, so as to switch the working mode of the terminal, such as switching between a factory mode and an operating mode. The indicating output circuit can adopt a double-color LED and a resistor to form an indicating lamp circuit with three colors, and can realize single-color or multi-color short-bright, single-color or multi-color cyclic flashing by matching with a timer in the microcontroller, thereby realizing the visual reflection of the mine wireless sensing terminal on the local key response and the running state.
That is, the operation mode can be switched by key input. The terminal is in a factory mode in default after leaving a factory, is in a complete silent state, consumes less than 10 microamperes in current, can be switched to an operation mode through a key after being put into use, reduces unnecessary energy consumption in the processes of transportation, storage and installation, and reduces the power consumption of the mining wireless sensing terminal in the whole life cycle.
Specifically, as shown in fig. 3, the operation mode includes an active mode and a low power consumption mode, and the active mode and the low power consumption mode are switched with each other by an event trigger and an execution result. And, the active mode includes an interactive active mode periodic active mode.
That is to say, the mining wireless sensing terminal according to the embodiment of the present invention can be divided into a factory mode and an operation mode according to an operation mode, the factory mode is defaulted after leaving a factory, and the terminal is in a completely silent state and can be switched to the operation mode through a key. When the terminal is in an operation mode, two operation strategies of a low power consumption mode and an active mode are adopted, wherein the active mode is divided into an interactive active mode and a periodic active mode.
In the embodiment of the invention, when the mining wireless sensing terminal is in the low power consumption mode, the power management unit automatically turns off the power supplies of the sensor acquisition unit and the wireless communication unit, and only the microcontroller and the real-time clock are reserved for low power consumption work. And in the low power consumption mode, the state monitoring circuit and the key input circuit of the mining wireless sensing terminal adopt an interruption triggering mode and operate in a low power consumption mode, so that the power consumption of the mining wireless sensing terminal in a standby state is reduced. The terminal is automatically awakened to an active mode through manual triggering of a key and periodic timing interruption.
Optionally, in an embodiment of the present invention, when the mining wireless sensing terminal enters the interactive active mode, the control unit 60 is further configured to obtain an operation state of the mining wireless sensing terminal, and acquire sensor detection information through the sensor acquisition unit when the mining wireless sensing terminal is judged to normally operate according to the operation state of the mining wireless sensing terminal; when the manually set energy buffering interval time is up, monitoring the quality of a wireless communication signal, externally sending the detection information of the sensor and the running state of the mining wireless sensing terminal through the wireless communication unit, and controlling the terminal to enter a low power consumption mode when receiving an external response instruction through the wireless communication unit.
That is to say, the mining wireless sensing terminal in the embodiment of the present invention uses a key identification circuit to take a key event exceeding the effective key duration as an effective interrupt, and the microcontroller detects that the interrupt occurs to trigger the interactive active mode. When the mining wireless sensing terminal is in an interactive active mode, firstly, state information of the mining wireless sensing terminal and detection information of a sensor are collected, after the collection is completed, the electric quantity state and the running state are identified, the running state of the mining wireless sensing terminal is indicated through an LED of an indication output circuit, if the running state is normal, the monitoring of wireless communication signal quality is initiatively initiated with extremely short delay or no delay according to the set manual energy buffering interval time and optional parameters of 0-2 seconds, data information is reported, response receiving service is started, meanwhile, the quality of the wireless communication signal is indicated through the LED of the indication output circuit, and if an external response is received, the mining wireless sensing terminal automatically shifts to a low power consumption mode.
Optionally, in another embodiment of the present invention, when the mining wireless sensing terminal enters a periodic active mode, the control unit 60 is further configured to obtain an operation state of the mining wireless sensing terminal, and acquire sensor detection information through the sensor acquisition unit when the mining wireless sensing terminal is judged to normally operate according to the operation state of the mining wireless sensing terminal; according to the preset periodic energy buffering interval time, monitoring the energy storage capacity of the energy buffering unit in a delayed mode; when the energy storage capacity of the energy buffer unit is smaller than a preset capacity threshold, controlling the energy buffer unit to perform energy storage delay, monitoring the quality of a wireless communication signal until the energy storage capacity of the energy buffer unit is larger than or equal to the preset capacity threshold, externally sending the detection information of the sensor and the running state of the mining wireless sensing terminal through the wireless communication unit, and controlling the mining wireless sensing terminal to enter a low power consumption mode when an external response instruction is received through the wireless communication unit, wherein if the quality of the wireless communication signal is poor and no response signal occurs after the information is sent out, the wireless communication period is automatically increased until the period is increased to the maximum value, or the quality of the wireless communication signal is recovered and the normal communication period is recovered after the response instruction is received.
That is to say, when the mining wireless sensing terminal enters the running mode, the RTC is started, the RTC alarm clock work interruption output mode is set, the RTC interruption time interval is set, and the periodic active mode is triggered by taking the periodic RTC interruption event as the active mode trigger mark. When the mining wireless sensing terminal is in a periodic active mode, firstly, state information of the mining wireless sensing terminal and detection information of a sensor are collected, after the collection is completed, the electric quantity state and the operation state of the mining wireless sensing terminal are identified, if the operation state of the mining wireless sensing terminal is normal, the stored energy electric quantity of an energy buffer unit is detected in a delayed mode according to set periodic energy buffer interval time, if the stored energy electric quantity is low, the stored energy delay is preferentially executed, then, wireless communication signal quality monitoring is initiatively initiated, data information is reported, after the information reporting is completed, response receiving service is started, and if an external response is received, the terminal automatically shifts to a low power consumption mode. When the mining wireless sensing terminal is in the periodic active mode, if the wireless communication signal quality is poor and no response signal is generated after the information is sent, the mining wireless sensing terminal automatically increases the wireless communication period until the wireless communication period is increased to the maximum period value or the signal quality is recovered and the normal communication period is recovered after the response is received, so that unnecessary energy consumption when wireless communication is interfered or a network fault occurs is reduced, and the power consumption of the mining wireless sensing terminal during working is reduced.
In summary, the mining wireless sensing terminal provided by the embodiment of the invention has a simple structure and is convenient to operate, and by reducing the magnitude of power current demand, the standby power consumption, the operating power consumption, the life cycle power consumption and other processing modes, the comprehensive energy consumption level is greatly reduced, the low-energy-consumption operation is realized, the service life of a battery is prolonged, so that the mining wireless sensing terminal can realize stable operation by using an external weak electric quantity conversion device, or realize maintenance-free long-term operation by using an internal single battery, and the service cycle is prolonged. And, still include the following beneficial effect:
(1) through increasing energy buffer unit between power supply unit and load circuit, realize that buffer circuit provides stable power supply voltage to the load, avoid the load directly to draw heavy current and reduce inside battery performance from inside battery or external power supply unit to promote inside battery life.
(2) The low-power-consumption mode and the active mode of the mining wireless sensing terminal are realized by arranging the power management unit, the power management unit automatically turns off the power supplies of the sensor acquisition unit and the wireless communication unit in the low-power-consumption mode, only the microcontroller and the real-time clock are kept to work in low power consumption, and in the low-power-consumption mode, the low-state monitoring circuit and the key input circuit of the mining wireless sensing terminal adopt an interruption triggering mode and run in a low-power-consumption mode, so that the power consumption in standby can be reduced.
(3) The invention adopts an energy buffer control strategy, namely, the control unit collects the detection information of the sensor in a periodic working mode and initiates wireless communication in an active reporting mode, so that the terminal enters a low power consumption mode in an intermittent period, and the operations of collecting the detection information of the sensor, carrying out wireless communication and the like with higher instantaneous power consumption are carried out in an interval and delay execution mode, the stored energy electric quantity of the energy buffer unit is detected before execution, if the electric quantity is lower, the delay execution is carried out, and the phenomenon that a load continuously draws large current or excessively draws current from the energy buffer unit to indirectly increase the power supply load and reduce the performance of an internal battery is avoided, so that the service life of the internal battery is prolonged, and the power consumption during working is reduced.
(4) The invention does not need large current output capability to the power supply, thereby realizing stable operation by using an external weak electric quantity conversion device or realizing maintenance-free long-term operation by adopting an internal battery.
(5) When the mining wireless sensing terminal initiates wireless communication, the quality of a wireless communication signal is detected firstly, and a response confirmation mechanism is adopted during the wireless communication, if the quality of the wireless communication signal is poor and no response signal occurs continuously after the information is sent out, the wireless communication period is automatically increased until the wireless communication period is increased to the maximum period value or the signal quality is recovered and the normal communication period is recovered after the response is received, so that unnecessary energy consumption when the wireless communication is interfered or the network fails is reduced, and the power consumption of the terminal during working is reduced.
(6) The mining wireless sensing terminal provided by the invention adopts a factory mode and an operation mode for switching, the operation mode can be switched through key input, the factory mode is defaulted after equipment leaves a factory, the terminal is in a completely silent state, and after the terminal is put into use, the terminal can be switched to the operation mode through keys, so that unnecessary energy consumption in the processes of transportation, storage and installation is reduced, and the power consumption of the terminal in the whole life cycle is reduced.
(7) The mining wireless sensing terminal provided by the invention can be installed and used in a wireless manner without accessing a power cable and a communication cable, so that the installation and maintenance difficulty is reduced, the efficiency is improved, the cost is reduced, and the risk of power supply interruption or communication interruption caused by activities such as construction and operation is reduced.
(8) The invention can greatly reduce the difficulty of construction and maintenance of the monitoring system, reduce the operation and maintenance cost, improve the production efficiency and ensure the reliable operation of safe production.
As will be appreciated by one skilled in the art, embodiments of the present invention may be provided as a method, system, or computer program product. Accordingly, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present invention may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.
The present invention is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems) and computer program products according to embodiments of the invention. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions.
It should be noted that in the claims, any reference signs placed between parentheses shall not be construed as limiting the claim. The word "comprising" does not exclude the presence of elements or steps not listed in a claim. The word "a" or "an" preceding an element does not exclude the presence of a plurality of such elements. The invention may be implemented by means of hardware comprising several distinct elements, and by means of a suitably programmed computer. In the claims enumerating several means, several of these means may be embodied by one and the same item of hardware. The use of the terms first, second, third, etc. are used for convenience only and do not denote any order. These words are to be understood as part of the name of the component.
Furthermore, it should be noted that in the description of the present specification, the description of the term "one embodiment", "some embodiments", "examples", "specific examples" or "some examples", etc., means that a specific feature, structure, material or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.
While preferred embodiments of the present invention have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. Therefore, the claims should be construed to include preferred embodiments and all changes and modifications that fall within the scope of the invention.
It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit or scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention should also include such modifications and variations.
Claims (5)
1. A mining wireless sensing terminal, comprising:
a power supply unit; the power supply unit is a battery;
the energy buffer unit is connected with the power supply unit and used for performing buffer control on the output current of the power supply unit, the energy buffer unit provides stable voltage for the internal load unit of the mining wireless sensing terminal, and the energy buffer unit is used for outputting continuous power supply current for the internal load unit of the mining wireless sensing terminal;
the sensor acquisition unit is used for acquiring information detected by the sensor;
the wireless communication unit is used for establishing external communication connection of the mining wireless sensing terminal;
the electric quantity monitoring unit is used for monitoring the voltage or the stored energy electric quantity of the energy buffer unit and/or the power supply unit;
the control unit is respectively connected with the sensor acquisition unit, the wireless communication unit and the electric quantity monitoring unit and adopts an energy buffer control strategy, namely, the information detected by the sensor is collected by adopting a periodic working mode, and the wireless communication is initiated by adopting an active reporting mode so as to control the terminal to enter a low power consumption mode in an intermittent period, and during the acquisition work of the sensor acquisition unit and/or the communication work of the wireless communication unit, the acquisition work of the sensor acquisition unit and the communication work of the wireless communication unit are selected to be immediately executed according to the energy storage capacity of the energy buffer unit, the execution mode is selected again according to the energy storage capacity after the time is prolonged, and one of the three execution modes is abandoned, wherein the control unit is a microcontroller; the energy buffer unit comprises an energy storage component and a voltage conversion circuit,
the energy storage capacity range of the energy buffer unit is 2-18 joules, when the output power of the power supply unit is lower than 0.3 watt, the maximum output power of the energy buffer unit is not lower than 0.3 watt,
when the power supply unit does not output current, the energy buffer unit continuously outputs electric quantity not lower than 0.05 joule;
when the power supply unit supplies power normally or abnormally, the energy buffer unit at least provides instantaneous power of not less than 0.3 watt or continuous electric quantity of not less than 0.05 joule for one of the control unit, the wireless communication unit and the sensor acquisition unit;
the abnormality of the power supply unit comprises one of no output current, small output current and unstable output power of the power supply unit, and the energy buffer unit further comprises a voltage monitoring circuit, a switching circuit and a current-limiting resistor;
the voltage monitoring circuit, the switch circuit and the current limiting resistor form a current buffer channel,
the energy buffer unit comprises 2 current buffer channels and corresponding preset voltage thresholds, the range of the preset voltage threshold is 2.5-6V, when the voltage monitoring circuit monitors that the input voltage difference between the power supply unit and the energy storage assembly is larger than the preset voltage threshold, the energy buffer unit is automatically switched to a first current buffer channel through a switching circuit, and when the voltage monitoring circuit monitors that the input voltage difference between the power supply unit and the energy storage assembly is smaller than or equal to the preset voltage threshold, the energy buffer unit is automatically switched to a second current buffer channel through the switching circuit, and the energy buffer unit controls the power supply unit to output current in a range of 3 mA-70 mA under different working conditions through the automatically switched current buffer channels;
the impedance of the second current buffer channel is smaller than that of the first current buffer channel;
the mining wireless sensing terminal also comprises a human-computer interaction unit, the human-computer interaction unit is connected with the control unit, the control unit receives an instruction through the human-computer interaction unit to control the mining wireless sensing terminal to switch between a factory mode and an operation mode,
the mining wireless sensing terminal is in a complete silence state in the factory mode until the mining wireless sensing terminal is switched to the running mode;
the operation modes comprise an active mode and a low power consumption mode, and the active mode and the low power consumption mode are mutually switched through event triggering and execution results;
the active mode comprises an interactive active mode and a periodic active mode, and when the mining wireless sensing terminal enters the periodic active mode, the control unit is further used for acquiring the running state of the mining wireless sensing terminal, judging that the mining wireless sensing terminal runs normally according to the running state of the mining wireless sensing terminal, and acquiring information detected by a sensor through the sensor acquisition unit;
when the preset energy buffering interval time is up, monitoring the energy storage capacity of the energy buffering unit;
when the energy storage capacity of the energy buffer unit is smaller than a preset capacity threshold, controlling the energy buffer unit to perform energy storage delay, monitoring the quality of a wireless communication signal until the energy storage capacity of the energy buffer unit is larger than or equal to the preset capacity threshold, externally sending information detected by the sensor and the running state of the mining wireless sensing terminal through the wireless communication unit, and controlling the mining wireless sensing terminal to enter a low power consumption mode when an external response instruction is received through the wireless communication unit, wherein if the signal quality of wireless communication is poor and no response signal occurs after the information is sent out, the wireless communication period is automatically increased until the period is increased to the maximum value, or the wireless communication signal quality is recovered and the normal communication period is recovered after the response instruction is received.
2. The mining wireless sensing terminal of claim 1, further comprising a power management unit for controlling whether the energy buffer unit supplies power to the sensor acquisition unit and the wireless communication unit,
when the mining wireless sensing terminal works in a low power consumption mode, the control unit closes the power supply of the sensor acquisition unit and/or the wireless communication unit through the power management unit.
3. The mining wireless sensing terminal of claim 1, wherein the control unit further obtains a wireless communication signal quality when the mining wireless sensing terminal-to-external communication connection is established through the wireless communication unit, and controls a wireless communication time interval and/or a signal gain of the mining wireless sensing terminal according to the wireless communication signal quality.
4. The mining wireless sensing terminal of claim 1, characterized in that the power supply unit comprises an internal battery and/or an external energy input unit,
the external energy input unit is used for being connected with an external power supply, and the internal battery and the external energy input unit are connected with the energy buffer unit to supply power to the energy buffer unit.
5. The mining wireless perceiving terminal of any one of claims 2 to 4, wherein the active modes include an interactive active mode and a periodic active mode, the control unit being further configured to, when the mining wireless perceiving terminal enters the interactive active mode,
acquiring the running state of the mining wireless sensing terminal, and judging that the mining wireless sensing terminal runs normally according to the running state of the mining wireless sensing terminal, and acquiring information detected by a sensor through a sensor acquisition unit;
when the preset energy buffer interval time is up, monitoring the quality of a wireless communication signal, externally sending information detected by the sensor and the running state of the mining wireless sensing terminal through the wireless communication unit, and controlling the mining wireless sensing terminal to enter a low power consumption mode when receiving an external response instruction through the wireless communication unit.
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| CN114281291A (en) * | 2021-12-28 | 2022-04-05 | 海信视像科技股份有限公司 | Display device, control device and low-power prompting method of control device |
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