CN209658919U - A kind of induction of extremely low power dissipation takes electric radio temperature sensor - Google Patents
A kind of induction of extremely low power dissipation takes electric radio temperature sensor Download PDFInfo
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- CN209658919U CN209658919U CN201920479864.4U CN201920479864U CN209658919U CN 209658919 U CN209658919 U CN 209658919U CN 201920479864 U CN201920479864 U CN 201920479864U CN 209658919 U CN209658919 U CN 209658919U
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Abstract
The utility model discloses a kind of inductions of extremely low power dissipation to take electric radio temperature sensor, including open loop sensing electricity getting device, energy storage rectifier circuit, voltage monitoring chip enables holding circuit, linear regulator chip, data acquisition and processing (DAP) circuit, wireless data transmitting line.The work that the utility model keeps sensor interrupted using the coil-induced electric energy of the ribbon core of a very little has the advantages that small in size, structure is simple, and easy for installation, power consumption is extremely low, and communication distance is remote, and primary side current when start-up operation is small.
Description
Technical field
The utility model relates to a kind of inductions of extremely low power dissipation to take electric radio temperature sensor.
Background technique
Currently there are a variety of wireless and passive temperature sensors, but they have clearly disadvantageous place.Such as
SAW Temperature Sensors and RFID temperature label, although their structures are simple, easy for installation, communication distance is too short,
Be not suitable for the more dispersed application of measuring point；CT takes the radio temperature sensor of electricity using 2.4G Hz, the less radio-frequencies such as 433M Hz
Circuit, although communication distance is remote, CT body product is big, and installation is inconvenient, and when the electric current in a lateral circuit is excessive, CT
The overtension of induction may damage sensor；Also there is design to take electricity using the magnet ring of open circuit, simplify structure, be easily installed,
But magnet ring induction of opening a way takes the ability of electricity to weaken significantly, such design is had to extremely more using sufficiently bulky iron core and the number of turns
Coil, take electrical power to increase and maintain continuing working for sensor, and only when the power current of primary side is larger
When, the sensor of such design could start to work, thus can not be suitable for the circuit of many Smaller loads.
Summary of the invention
The utility model takes the principle of electricity based on open loop induction to solve above-mentioned problems, proposes that one kind is small in size,
It is easily installed, there is extremely low power dissipation, the design of the remote radio temperature sensor of communication distance.Specific design includes that open loop induction takes
Electric installation, energy storage rectifier circuit, voltage monitoring chip enable holding circuit, linear regulator chip, data acquisition and processing (DAP) electricity
Road, wireless data transmitting line；The open loop sensing electricity getting device is by rectangle iron core and the coil group for being wound on the iron core surface
At the output end of the coil is connected with the input terminal of the energy storage rectifier circuit, the output end point of the energy storage rectifier circuit
It is not connect with the voltage input end of the input terminal of the voltage monitoring chip and the linear regulator chip, the voltage monitoring core
The output end of piece is connected with the input terminal of the enabled holding circuit, the output end of the enabled holding circuit and described linear steady
Press chip enabled input terminal connection, the output end of the linear regulator chip respectively with the data acquisition and processing (DAP) circuit
Voltage input end is connected with the voltage input end of the wireless data transmitting line, the data of the data acquisition and processing (DAP) circuit
Output end is connected with the data input pin of the wireless data transmitting line；The energy storage rectifier circuit is by rectification bridge chip and storage
The ac input end of energy capacitor composition, the rectification bridge chip is connected with the output end of the open loop sensing electricity getting device, described
The direct current of rectification bridge chip is just being separately connected the positive-negative input end of the storage capacitor, the storage capacitor with direct current negative output terminal
For tantalum capacitor；The enabled holding circuit is by delay capacitor, time delay resistance and reversed hold-off diode composition, the delay capacitor
With the time delay resistance it is in parallel after the enable end with the cathode of the reversed hold-off diode and the linear regulator chip respectively
The anode of connection, the reversed hold-off diode is connected with the output end of the voltage monitoring chip；The data acquisition and place
Reason circuit is made of the STM32 microcontroller and temperature sensor of low-power consumption, the A/D conversion port of the STM32 microcontroller
It is connected with the temperature sensor, the number of the spi bus interface of the STM32 microcontroller and the wireless data transmitting line
It is connected according to input terminal；The wireless data transmitting line is 2.4G Hz wireless radio frequency circuit.
The open loop sensing electricity getting device in above structure is simplified to the ribbon core coil an of very little, the iron core by
Silicon steel sheet 10 of 0.3mm thickness are formed by stacking, and the line footpath of the coil is 0.1mm, and the number of turns of the coil is 280 circles.This reality
With the work interrupted using the electric energy of open loop sensing electricity getting device acquisition of the sensor of new design, the time of every task
Only 150ms or so, remaining time are in the off state of extremely low power dissipation.When the power current of a lateral circuit reaches 6A or so
When, sensor can start to work and transmit wirelessly temperature data.
Concretely, the rectification bridge chip is converted to alternating current that the open loop sensing electricity getting device incudes is lasting
Direct current, and store into the storage capacitor, the voltage of the storage capacitor gradually rises, and the voltage monitoring chip is real-time
The voltage for monitoring the storage capacitor, when the voltage of the storage capacitor is lower than 3.6V, the voltage monitoring chip output is low
Level, the enabled holding circuit also export low level, and the linear regulator chip is in an off state, the power consumption of entire circuit
Less than 1 μ A；After the voltage of the storage capacitor is increased to 3.6V, the voltage monitoring chip exports high level to described reversed
Hold-off diode, the reversed hold-off diode conducting, and charge to the delay capacitor, the voltage of the delay capacitor is quick
It is raised to 2.8V or so, and enables the linear regulator chip, the linear regulator chip is started to work and the respectively described data
Acquisition and processing circuit and the wireless data transmitting line provide stable voltage；At this time since the power consumption of circuit increases, institute
The voltage drop of storage capacitor is stated as low as 3.6V hereinafter, the voltage monitoring chip exports low level, due to the reversed cut-off two
The presence of pole pipe, sub-fraction electric energy are retained in the delay capacitor, and by the time delay resistance slow release, in institute
Before the voltage drop of delay capacitor is stated as low as 0.3V, the enabled holding circuit holding enables the linear regulator chip.
The work of the linear regulator chip can be adjusted by adjusting the capacitance of the delay capacitor and the resistance value of the time delay resistance
Make the time and arrive 150ms or so, to there is the sufficient time to complete the acquisition of temperature data and the hair of processing and wireless data
It send.By selecting the capacity of the suitable storage capacitor, so that within the working time of the linear regulator chip, the storage
The voltage of energy capacitor is reduced from 3.6V, but stills remain in 3V or more, and the linear regulator chip can export 2.8V's
Burning voltage；Because the working time of the linear regulator chip is very short, the average power consumption of sensor is extremely low, so the energy storage
Capacitor does not need too big capacity, and capacity can be selected usually little, but small in size, at low cost, the stable tantalum capacitor of performance
As the storage capacitor.When the voltage drop of the delay capacitor is as low as 0.3V or less, the linear regulator chip is enabled
Blackout, entire circuit come back to the off state of extremely low power dissipation, and the voltage of the storage capacitor starts to gradually rise again,
It is prepared to enter into next duty cycle.
The utility model has the beneficial effects that: a kind of induction of extremely low power dissipation described in the utility model takes electric wireless temperature
It spends sensor and uses interrupted operating mode, the time of every task only has 150ms or so, remaining time is in extremely low power dissipation
Off state, average power consumption are extremely low.When the power current of a lateral circuit reaches 6A or so, the sensor is begun to discontinuously
Work, and operation range about 40s every time.The electric current of lateral circuit is bigger, and each operation range of sensor is shorter.
When the electric current of a lateral circuit reaches 80A or so, the core sataration of the open loop sensing electricity getting device, magnetic flux is not further added by,
It avoids the electric energy of induction excessive and can not completely consume, at this time each operation range of the sensor about 8s.
Compared to surface acoustic wave wireless temperature sensor or RFID label tag radio temperature sensor, the utility model is due to adopting
With 2.4G wireless radio frequency circuit, communication distance is farther, up to 300 meters or so in spacious environment；Electricity is taken compared to traditional CT
Radio temperature sensor, the open loop sensing electricity getting device that the utility model uses is small in size, at low cost, is easily installed；Compared to
Certain radio temperature sensors also with open loop induction power taking technology design, and the circuit design of the utility model innovation makes
Sensor is in interrupted operating mode, and the time of every task is very short, in an off state in the time more as far as possible, average function
Consume extremely low, required iron core is smaller, and coil is less, and the electric current of lateral circuit when start-up operation is lower.
Detailed description of the invention
Fig. 1 is that a kind of induction of extremely low power dissipation described in the utility model takes the circuit diagram of electric radio temperature sensor.
Specific embodiment
The utility model will be further described below with reference to the accompanying drawings: one kind described in the utility model as shown in Figure 1
It includes open loop sensing electricity getting device U1, energy storage rectifier circuit 1, voltage monitoring that the induction of extremely low power dissipation, which takes electric radio temperature sensor,
Chip U3 enables holding circuit 2, linear regulator chip U4, data acquisition and processing (DAP) circuit 3, wireless data transmitting line U7.It opens
Ring sensing electricity getting device U1 is by rectangle iron core and is wound on the coil on the iron core surface and forms, iron core by 0.3mm thickness silicon steel sheet
10 are formed by stacking, and the line footpath of coil is 0.1mm, and the number of turns of coil is 280 circles, the output end and energy storage rectifier circuit 1 of coil
Input terminal connection.The output end of energy storage rectifier circuit 1 input terminal and linear regulator chip with voltage monitoring chip U3 respectively
The voltage input end of U4 connects；The output end of voltage monitoring chip U3 is connected with the input terminal of enabled holding circuit 2, makes to be able to maintain
The output end of circuit 2 is connected with the enabled input terminal of linear regulator chip U4, the output end of linear regulator chip U4 respectively with number
Connect according to acquisition with the voltage input end of processing circuit 3 with the voltage input end of wireless data transmitting line U7, data acquire with
The data output end of processing circuit 3 is connected with the data input pin of wireless data transmitting line U7.
Energy storage rectifier circuit 1 is made of rectification bridge chip U2 and storage capacitor C1, rectifies the ac input end of bridge chip U2
It is connected with the output end of open loop sensing electricity getting device U1, the direct current of rectification bridge chip U2 is just separately connected storage with direct current negative output terminal
The positive-negative input end of energy capacitor C1, storage capacitor C1 are tantalum capacitor.
Voltage monitoring chip U3 is low-voltage reset chip XC61CC3602MR, when its input voltage is lower than 3.6V, electricity
It presses monitoring chip U3 to export low level, otherwise exports high level.
Enabled holding circuit 2 is made of delay capacitor C2, time delay resistance R1 and reversed hold-off diode D1, delay capacitor C2
It is connect respectively with the enable end of the cathode of reversed hold-off diode D1 and linear regulator chip U4 after in parallel with time delay resistance R1, instead
It is connected to the anode of hold-off diode D1 with the output end of voltage monitoring chip U3.
Linear regulator chip U4 be low voltage difference, the LDO with enable port, in the input voltage range of 3V to 6V, linearly
Voltage stabilizing chip U4 exports stable 2.8V.
Data acquisition and processing (DAP) circuit 3 is made of the STM32 microcontroller U5 and temperature sensor U6 of low-power consumption, STM32
The A/D conversion port of microcontroller U5 is connected with temperature sensor U6, the spi bus interface of STM32 microcontroller U5 and wireless
The data input pin of data transmitting line U7 connects；Wireless data transmitting line U7 is 2.4G Hz wireless radio frequency circuit.Due to number
It is generally deposited in the circuit design of other radio temperature sensors according to acquisition and processing circuit 3 and wireless data transmitting line U7
It is not the emphasis of the utility model research and development, so not providing their specific circuit structures in Fig. 1.
As shown in Figure 1, the alternating current that open loop sensing electricity getting device U1 induction generates is converted into direct current by rectification bridge chip U2
Electricity is simultaneously stored into storage capacitor C1.When the voltage of storage capacitor C1 is less than 3.6V, voltage monitoring chip U3 exports low level,
Enabled holding circuit 2 also exports low level, and linear regulator chip U4 is then in the off state of extremely low power dissipation.Work as storage capacitor
When the voltage of C1 is greater than 3.6V, voltage monitoring chip U3 exports high level, and reversed hold-off diode D1 is connected, delay capacitor C2's
Voltage is rapidly brought up to 2.8V or so and enabled linear regulator chip U4, at this time data acquisition and processing (DAP) circuit 3 and wireless data hair
Power transmission road U7 starts to work.Then since the power consumption of circuit increases, the voltage drop of storage capacitor C1 is as low as 3.6V hereinafter, voltage is supervised
It controls chip U3 and exports low level, due to the presence of reversed hold-off diode D1, sub-fraction electric energy is retained in delay capacitor C2
In and by time delay resistance R1 slow release, delay capacitor C2 voltage drop as low as 0.3V before, at linear regulator chip U4
In enabled state.By matching delay capacitor C2 and time delay resistance R1, the time of the every task of linear regulator chip U4 is controlled
In 150ms or so, such sensor just has the sufficient time to complete temperature acquisition, the functions such as data processing and wireless transmission.Storage
The capacity of energy capacitor C1 does not need too greatly, as long as meeting the electricity of storage capacitor C1 within the working time of linear regulator chip U4
Pressure is reduced from 3.6V, but stills remain in 3V or more, and such linear regulator chip U4 can export the burning voltage of 2.8V.
When the voltage drop of delay capacitor C2 is as low as 0.3V or less, the enable signal of linear regulator chip U4 disappears, and entire circuit is again
The off state of extremely low power dissipation is returned to, the voltage of storage capacitor C1 starts to gradually rise again, is prepared to enter into next duty cycle.
Above-described embodiment is the preferred embodiment of the utility model, is not the limit to technical solutions of the utility model
System, as long as being regarded as falling into without the technical solution that creative work can be realized on the basis of the above embodiments
In the rights protection scope of the utility model patent.
Claims (7)
1. a kind of induction of extremely low power dissipation takes electric radio temperature sensor, it is characterised in that: whole including open loop sensing electricity getting device
Accumulator is flowed, voltage monitoring chip enables holding circuit, linear regulator chip, data acquisition and processing (DAP) circuit, wireless data
Transmitting line；The open loop sensing electricity getting device is made of rectangle iron core with the coil for being wound on the iron core surface, the coil
Output end connected with the input terminal of the energy storage rectifier circuit, the output end of the energy storage rectifier circuit respectively with the voltage
The input terminal of monitoring chip is connected with the voltage input end of the linear regulator chip, the output end of the voltage monitoring chip and
The input terminal of the enabled holding circuit connects, the output end of the enabled holding circuit and enabling for the linear regulator chip
Input terminal connection, the output end of the linear regulator chip respectively with the voltage input end of the data acquisition and processing (DAP) circuit and
The voltage input end of the wireless data transmitting line connects, the data output end of the data acquisition and processing (DAP) circuit and described
The data input pin of wireless data transmitting line connects.
2. a kind of induction of extremely low power dissipation according to claim 1 takes electric radio temperature sensor, it is characterised in that: described
Rectangle iron core is formed by stacking by 10 rectangle silicon steel sheets, the silicon steel sheet with a thickness of 0.3mm, the line footpath of the coil is
0.1mm, the number of turns of the coil are 280 circles.
3. a kind of induction of extremely low power dissipation according to claim 1 takes electric radio temperature sensor, it is characterised in that: described
Energy storage rectifier circuit is made of rectification bridge chip and storage capacitor；The ac input end of the rectification bridge chip and the open loop sense
The output end of electricity getting device is answered to connect, the direct current of the rectification bridge chip is just being separately connected the energy storage electricity with direct current negative output terminal
The positive-negative input end of appearance, the storage capacitor are tantalum capacitor.
4. a kind of induction of extremely low power dissipation according to claim 1 takes electric radio temperature sensor, it is characterised in that: described
For enabled holding circuit by delay capacitor, time delay resistance and reversed hold-off diode composition, the delay capacitor and the delay are electric
It is connect respectively with the enable end of the cathode of the reversed hold-off diode and the linear regulator chip after resistance is in parallel, it is described reversed
The anode of hold-off diode is connected with the output end of the voltage monitoring chip；The electric energy of the voltage monitoring chip output is by institute
It states reversed hold-off diode to be latched in the delay capacitor, and provides enable signal to the linear regulator chip, described
After energy in delay capacitor is slowly discharged by the time delay resistance, the enable signal also fades away；Pass through selection
The resistance value of the capacitance of the delay capacitor and the time delay resistance, each enable time of the linear regulator chip are adjusted to
150ms or so.
5. a kind of induction of extremely low power dissipation according to claim 1 takes electric radio temperature sensor, it is characterised in that: described
Data acquisition and processing (DAP) circuit is made of the STM32 microcontroller and temperature sensor of low-power consumption, the STM32 microcontroller
A/D conversion port is connected with the temperature sensor, the spi bus interface and the wireless data of the STM32 microcontroller
The data input pin of transmitting line connects.
6. a kind of induction of extremely low power dissipation according to claim 1 takes electric radio temperature sensor, it is characterised in that: described
Wireless data transmitting line is 2.4G Hz wireless radio frequency circuit.
7. a kind of induction of extremely low power dissipation according to claim 1 takes electric radio temperature sensor, it is characterised in that: described
The interrupted work of sensor, the time of every task about 150ms, remaining time are in the off state of extremely low power dissipation；Primary side
The alternating current of circuit is bigger, and each operation range of sensor is shorter.
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| CN201920479864.4U CN209658919U (en) | 2019-04-10 | 2019-04-10 | A kind of induction of extremely low power dissipation takes electric radio temperature sensor |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112701796A (en) * | 2020-12-21 | 2021-04-23 | 青岛鼎信通讯股份有限公司 | Fault indicator power management circuit based on CT energy taking |
| CN112751395A (en) * | 2020-12-15 | 2021-05-04 | 中国电力科学研究院有限公司 | Power management circuit and power management method for obtaining electricity through coil electromagnetic induction |
| CN114689026A (en) * | 2022-04-22 | 2022-07-01 | 南京芮捷电子科技有限公司 | Inclination angle sensor for passive detection of power cable |
-
2019
- 2019-04-10 CN CN201920479864.4U patent/CN209658919U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112751395A (en) * | 2020-12-15 | 2021-05-04 | 中国电力科学研究院有限公司 | Power management circuit and power management method for obtaining electricity through coil electromagnetic induction |
| CN112701796A (en) * | 2020-12-21 | 2021-04-23 | 青岛鼎信通讯股份有限公司 | Fault indicator power management circuit based on CT energy taking |
| CN114689026A (en) * | 2022-04-22 | 2022-07-01 | 南京芮捷电子科技有限公司 | Inclination angle sensor for passive detection of power cable |
| CN114689026B (en) * | 2022-04-22 | 2024-05-03 | 南京芮捷电子科技有限公司 | Inclination sensor for passively detecting power cable |
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