CN210268936U - Wireless temperature measurement system based on micro-energy collection - Google Patents
Wireless temperature measurement system based on micro-energy collection Download PDFInfo
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- CN210268936U CN210268936U CN201920372066.1U CN201920372066U CN210268936U CN 210268936 U CN210268936 U CN 210268936U CN 201920372066 U CN201920372066 U CN 201920372066U CN 210268936 U CN210268936 U CN 210268936U
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Abstract
The utility model discloses a wireless temperature measurement system based on micro-energy collection, which comprises a temperature sensor, a collection module, a receiving module, a communication module and an upper computer; the acquisition module comprises an energy collection unit and a signal processor, the receiving module adopts a data transfer device, and the temperature sensor is connected with the signal processor; the energy collecting unit even has vibrations energy generator, the energy collecting unit is connected with signal processor, be equipped with between vibrations energy generator and the energy collecting unit by piezoceramics device, as the energy source through the partial kinetic energy of vibrations energy generator in service production, with the help of piezoceramics device, the electric energy that utilizes the piezoelectricity effect to produce provides the electric energy for wireless temperature measurement system, guarantee wireless temperature sensor normal electrified work, realize temperature signal's detection and wireless transmission function, work such as the detection of cooperation upper computer completion entire system and energy-saving control, with reply industrial occasion in sensor quantity numerous, the wiring is complicated and can not off-line scene of work.
Description
Technical Field
The utility model belongs to the temperature monitoring field, concretely relates to wireless temperature measurement system based on micro energy gathers.
Background
With the great investment of automobiles into life, people have higher and higher requirements on the safety performance of automobiles. The safety of the automobile is realized by the stability of the brake system, and the brake disc is the core component of the automobile brake system. The temperature of the brake disc is increased due to frequent braking in the running process of the automobile, and the temperature of the brake disc directly influences the working performance of the brake disc, so that the temperature testing method for the brake disc is particularly important for testing the temperature of the brake disc.
The traditional temperature measurement system adopts a temperature sensor to collect information, and can be connected with a plurality of circuits including power lines, signal lines and the like during installation. However, due to the special environment of the brake disc, the excessive connecting wires can bury potential safety hazards for the stable operation of the system. The wireless sensor gradually occupies a signal acquisition part in a plurality of occasions by virtue of the advantages of higher flexibility, safety and reliability, low cost and the like. The wireless sensor on the existing market generally depends on the battery power supply, and the problems that the battery needs to be overhauled regularly, the battery needs to be replaced and the like exist, and in some occasions, the power-off overhaul of the equipment means that the production is stopped, and the production progress and the product quality bring a great deal of adverse effects and even produce more uncontrollable results.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a wireless temperature measurement system based on little energy is gathered has solved and has adopted temperature sensor to carry out information acquisition at present, and the circuit leads to the fact the problem of potential safety hazard more, and relies on battery powered to exist and needs regularly to overhaul, changes the problem of battery.
The utility model discloses a realize through following technical scheme:
a wireless temperature measurement system based on micro-energy collection comprises a temperature sensor, a collection module, a receiving module, a first communication module, a second communication module and an upper computer; the acquisition module comprises an energy acquisition unit and a signal processor which are used for micro-energy acquisition management, the receiving module adopts a data transfer device, and the data transfer device is used for processing the temperature data sent by the acquisition module;
the temperature sensor is connected with the signal processor, and the signal processor is used for converting a temperature signal measured by the temperature sensor into a voltage signal;
the energy collecting unit is connected with a vibration energy generator, the energy collecting unit is connected with a signal processor, the signal processor is connected with a data transfer device through a first communication module, and the data transfer device is communicated with an upper computer through a second communication module;
a piezoelectric ceramic device is arranged between the vibration energy generator and the energy collecting unit and is used for converting kinetic energy generated by the vibration energy generator into piezoelectric energy.
Furthermore, the acquisition module is also connected with a standby battery or a capacitor, and a power supply formed by the piezoelectric energy, the standby battery and the capacitor is converted and managed by the energy collection unit.
Further, the first communication module adopts a 2.4G wireless communication mode.
Further, the second communication module adopts a network port communication mode, and the network port communication adopts an Ethernet controller chip W5500 as an Ethernet physical layer.
Further, the signal processor adopts a single chip microcomputer MSP430AFE 253.
Furthermore, one channel of the signal processor collects thermocouple voltage, and the other channel collects cold junction compensation voltage to carry out cold junction compensation.
Further, the signal processor employs Cu50 for cold end compensation.
Further, the energy collection unit employs an ADP5091 chip.
Furthermore, three power supply input ends and two power supply output ends are arranged on the ADP5091 chip;
the three power input ends are respectively a VIN pin, a BACKUP pin and a BAT pin, the VIN pin is used as a main power input, and the BAT pin is used as a rechargeable system power input and is externally connected with a capacitor or a battery; the BACKUP pin is used for externally connecting an additional battery;
the two power supply output ends are respectively an SYS pin and an REG _ OUT pin, the SYS pin is used for supplying power to the ADP5091 chip, and the REG _ OUT pin is used as a main power supply path of the acquisition module.
Further, the data repeater adopts an STM32F103RCT6 chip.
Compared with the prior art, the utility model discloses following profitable technological effect has:
the utility model discloses a wireless temperature measurement system based on micro energy collection, including temperature sensor, collection module, receiving module, first communication module, second communication module and host computer, collection module includes energy collecting unit and signal processor that are used for the micro energy to collect the management, and receiving module adopts the data transfer ware; the energy collecting unit is connected with vibrations energy generator, be equipped with between vibrations energy generator and the energy collecting unit by the piezoceramics device, through vibration energy generator partial kinetic energy that produces in service as the energy source, with the help of the piezoceramics device, the electric energy that utilizes the piezoelectricity effect to produce provides the electric energy for wireless temperature measurement system, guarantee wireless temperature sensor normal live working, realize temperature signal's detection and wireless transmission function, work such as the detection of cooperation upper computer completion entire system and energy-saving control. The system reduces the loss of manpower and material resources caused by maintenance work such as regular battery replacement and the like, reduces various unsafe factors, and can efficiently complete acquisition tasks so as to deal with the scenes that the number of sensors is large, the wiring is complex and the offline work cannot be performed in industrial occasions.
Furthermore, the acquisition module is also connected with a standby battery or a capacitor, and a power supply formed by the voltage electric energy, the standby battery and the capacitor is converted and managed by the energy collection unit. When the vibration energy generator does not work, the temperature sensor adopts a standby battery or a capacitor for supplying power, and after the piezoelectric ceramic device converts kinetic energy generated by the vibration energy generator into piezoelectric energy, a power supply path of the temperature sensor is converted into piezoelectric energy by the standby battery or the capacitor; therefore, the energy consumption of a standby battery or a capacitor can be saved, and even if the battery is not powered, the temperature can be still acquired, so that the temperature measuring system can adapt to different environmental requirements.
Further, the second communication module adopts an Ethernet controller chip W5500 as an Ethernet physical layer, and the W5500 uses a new high-efficiency SPI protocol to support 80MHz rate, so that high-speed network communication can be better realized, and in order to reduce system power consumption, the W5500 provides a network awakening mode and a power down mode for a user to select.
Furthermore, one channel of the signal processor collects thermocouple voltage, the other channel collects cold end compensation voltage to carry out cold end compensation calculation, the Cu50 is used for measuring the temperature of the reference node, cold end voltage is obtained through reverse thrust, the measured voltage obtained from the temperature sensor is added with the cold end voltage to obtain node voltage, and the requirement of the limit temperature of the measured object is met.
Further, the energy collection unit adopts ADP5091 as a micro energy collection management chip and has the function of multi-power supply path management.
Drawings
Fig. 1 is a system schematic block diagram of the micro-energy collection based wireless temperature measurement system of the present invention;
FIG. 2 is a schematic view of the installation structure of the wireless temperature measurement system and the brake disc based on micro-energy collection of the present invention;
fig. 3 is a pin diagram of the energy harvesting unit of the present invention.
Wherein, 1 is temperature sensor, 2 is acquisition module, 3 is the brake disc, and 4 is the brake axle.
Detailed Description
The present invention will now be described in further detail with reference to specific examples, which are intended to be illustrative, but not limiting, of the invention.
As shown in fig. 1, the wireless temperature measurement system based on micro-energy collection of the present invention comprises a temperature sensor 1, a collection module 2, a receiving module, a first communication module, a second communication module and an upper computer; the acquisition module 2 comprises an energy acquisition unit and a signal processor for micro energy acquisition management, the receiving module adopts a data relay, and the data relay is used for processing the temperature data sent by the acquisition module 2; the temperature sensor 1 is connected with a signal processor, and the signal processor is used for converting a temperature signal measured by the temperature sensor 1 into a voltage signal; the energy collecting unit is connected with a vibration energy generator, the energy collecting unit is connected with a signal processor, the signal processor is connected with a data transfer device through a first communication module, and the data transfer device is communicated with an upper computer through a second communication module; a piezoelectric ceramic device is arranged between the vibration energy generator and the energy collecting unit and is used for converting kinetic energy generated by the vibration energy generator into piezoelectric energy.
Partial kinetic energy generated by the vibration energy generator in the running is used as an energy source, the electric energy generated by the piezoelectric effect is used for providing electric energy for the wireless temperature measuring system by means of the piezoelectric ceramic device, the normal electrified work of the wireless temperature sensor 1 is ensured, the temperature signal detection and wireless transmission functions are realized, and the upper computer is matched to complete the detection, energy-saving control and other works of the whole system. The system reduces the loss of manpower and material resources caused by maintenance work such as regular battery replacement and the like, reduces various unsafe factors, and can efficiently complete acquisition tasks so as to deal with the scenes that the number of sensors is large, the wiring is complex and the offline work cannot be performed in industrial occasions.
The acquisition module 2 comprises an energy collection unit and a signal processor, wherein the temperature sensor 1 adopts a K-type thermocouple and has a wider temperature acquisition range; the energy collection unit adopts ADP5091 as a micro energy collection management chip and has the function of multi-power supply path management; the signal processor employs a TI low power microprocessor MSP430AFE 253.
One channel of the TI low-power MSP430AFE253 single-chip microcomputer collects thermocouple voltage, the other channel collects cold junction compensation voltage to perform cold junction compensation calculation, the cold junction is the current environment temperature of the point where the collection module 2 is located, Cu50 is used for measuring reference node temperature, cold junction voltage is obtained through reverse thrust, the measured voltage obtained from the K-type thermocouple is added with the cold junction voltage to obtain node voltage, the node temperature is obtained according to the voltage-temperature relation table of the thermocouple, the temperature measurement range is 0-800 ℃, the wide range is achieved, and the requirement of the limit temperature of the brake disc 3 is met.
The acquisition module 2 is mainly responsible for acquiring temperature signals, and mainly transmits the temperature signals (transmitted in the form of voltage signals) acquired by the K-type thermocouple tightly attached to the measured object to the low-power consumption single-chip microcomputer MSP430AFE 253.
Preferably, the power supply part of the acquisition module 2 consists of three parts: piezoelectric energy, a backup battery and a small-sized super capacitor. The three parts of power supply paths are subjected to conversion management through an ADP5091 chip, and the structure of the power supply path management is shown in FIG. 3. The specific working process of energy collection is as follows:
the voltage electric energy changes alternating current into direct current through the full-bridge rectifier, and the rectifier bridge uses a 0.3V tube voltage drop and is formed by diodes with low leakage current, so that the power consumed on the full-bridge rectifier is very low. Four diodes with low leakage current limit the open-circuit input voltage of the ADP5091 to 2.8-3.6V to control the open-circuit input voltage. For ADP5091, the input end of three power supply is provided, VIN pin is the main power supply input, and the input voltage of 80mV to 3.3V can be supported, and the cold start voltage of 380mV can be supported during cold start; the BAT pin is a chargeable and dischargeable system power supply input and can be externally connected with a super capacitor or a lithium battery. When the main power supply is lost, the system is powered by a power supply connected with a BAT pin until the voltage on the BAT power supply drops to a certain amplitude; the BACKUP power input pin is externally connected with an additional battery, when a main power supply of the system has no input and the voltage on the BAT is low or not, the BACKUP power supply supplies power to the system, but the BACKUP is output in a single direction and cannot be charged, and the pin is generally connected with a disposable battery. The ADP5091 also has 2 power output terminals, including a SYS power output, for supplying power to the chip itself; and one REG _ OUT output for supplying power to the system circuit. We use the REG _ OUT output as the acquisition part main power path.
When the acquisition module 2 is also connected with a standby battery or a capacitor, the temperature sensor 1 is started by the standby battery or the capacitor firstly to acquire a temperature signal of the measured object; meanwhile, the vibration energy generator vibrates to generate kinetic energy, the piezoelectric ceramic device converts the kinetic energy generated by the vibration energy generator into piezoelectric energy, and the piezoelectric energy is collected in the energy collection unit; after generating the piezoelectric energy, the power path of the temperature sensor 1 is converted into the piezoelectric energy by the backup battery or the capacitor; the temperature sensor 1 continuously collects temperature signals of the measured object and sends the temperature signals to the signal processor, the signal processor converts the temperature signals into voltage signals, the voltage signals are sent to the data transfer device through the first communication module to be processed, and finally data processed by the data transfer device are sent to the upper computer through the second communication module.
The receiving module comprises a data transfer device, wherein the data transfer device adopts a processor STM32F103RCT6 of ST, the data transfer device is communicated with the signal processor through a 2.4G communication module, the data transfer device is communicated with the upper computer through network port communication, and the W5500 of WIZnet is used as an Ethernet physical layer for the network port communication. And the upper computer is developed based on QT and is used for displaying the temperature curve change and the model disk performance evaluation index.
The acquisition module 2 sends the calculated temperature value to the receiving module in a 2.4 wireless communication mode, and sends the received signal to the upper computer monitoring platform through the Ethernet by adopting the STM32F103RCT 6.
Ethernet uses a classic RJ-45 interface and can operate in half-duplex and full-duplex modes. The network jack uses the HR911105A interface of Han Run corporation. The LED status indicator lamp is arranged to display the communication activity status, and the network transformer is arranged in the LED status indicator lamp to improve the anti-interference capability and enable the transmission distance to be longer. STM32F103RCT6 connects Ethernet controller W5500 through SPI protocol, combines the RJ-45 interface, realizes the ethernet communication. W5500 is a full-hardware TCP/IP (network communication protocol) embedded Ethernet controller, provides a simpler Internet connection scheme for an embedded system, provides SPI as a peripheral MCU interface, shares four signals of SCSn, SCLK, MOSI and MISO, and works as an SPI slave. In addition, the W5500 uses a new high-efficiency SPI protocol to support the rate of 80MHz, so that high-speed network communication can be better realized. In order to reduce system power consumption, W5500 provides a wake-on-lan mode and a power-down mode for user selection.
When the wireless temperature measurement system is applied to monitoring the temperature of the automobile brake disc 3, the temperature sensor 1 aims to detect the temperature of the brake disc 3, and the installation schematic diagram is shown in fig. 2. The temperature sensor 1 is arranged on the brake disc 3 and is tightly attached to a temperature source, so that the effectiveness of the acquired temperature is ensured; the acquisition module 2 is installed on a brake shaft 4, the brake shaft 4 pulls a brake disc 3 to rotate, and the temperature sensor 1 and the acquisition module 2 are relatively static. The receiving module and the upper computer are installed in the vehicle, so that a driver can timely acquire relevant information such as temperature.
After the automobile is started, the wireless temperature measuring system is activated, and the process of drawing a data receiving curve is started after communication verification is normal. After the automobile is started, the acquisition module 2 converts the natural vibration of the engine into electric energy through the piezoelectric ceramics and then enters the micro-energy collection unit. The temperature sensor 1 can be started by a standby battery, and after the electric energy of the vibration energy part works normally, the power supply path is modified into a vibration source, and the uninterrupted operation of the acquisition system is kept. And then the temperature data of the temperature sensor 1 is wirelessly sent to a receiving module through 2.4G for data transfer processing, and finally the data is sent to an upper computer through Ethernet for display. The upper computer receives the collected temperature information through the Ethernet, draws a temperature curve in real time, displays the change trend, and gives the current state of the brake disc 3 through the temperature trend, so that a manager can observe the temperature change at any time and prevent the occurrence of faults in time.
To sum up, the utility model relates to a wireless temperature measurement system based on little energy is gathered can effectively solve the temperature measurement of car brake disc, and the problem of the complicated current situation that can not the off-line of wiring has reduced manpower, material resources and financial resources to and various unsafe factors, and the wireless temperature measurement system based on little energy is gathered has advantages such as the consumption is little, job stabilization is reliable and the maintenance cost is low.
Claims (10)
1. A wireless temperature measurement system based on micro-energy collection is characterized by comprising a temperature sensor (1), a collection module (2), a receiving module, a first communication module, a second communication module and an upper computer; the acquisition module (2) comprises an energy acquisition unit and a signal processor for micro energy acquisition management, the receiving module adopts a data transfer device, and the data transfer device is used for processing the temperature data sent by the acquisition module (2);
the temperature sensor (1) is connected with the signal processor, and the signal processor is used for converting a temperature signal measured by the temperature sensor (1) into a voltage signal;
the energy collecting unit is connected with a vibration energy generator, the energy collecting unit is connected with a signal processor, the signal processor is connected with a data transfer device through a first communication module, and the data transfer device is communicated with an upper computer through a second communication module;
a piezoelectric ceramic device is arranged between the vibration energy generator and the energy collecting unit and is used for converting kinetic energy generated by the vibration energy generator into piezoelectric energy.
2. The micro-energy collection-based wireless temperature measurement system according to claim 1, wherein the collection module (2) is further connected with a backup battery or a capacitor, and a power source formed by the piezoelectric energy, the backup battery and the capacitor is converted and managed by an energy collection unit.
3. The wireless temperature measurement system based on micro-energy collection according to claim 1, wherein the first communication module adopts a 2.4G wireless communication mode.
4. The wireless temperature measurement system based on micro-energy collection according to claim 1, wherein the second communication module adopts a network port communication mode, and the network port communication adopts an Ethernet controller chip W5500 as an Ethernet physical layer.
5. The wireless thermometry system based on micro-energy harvesting of claim 1, wherein the signal processor employs a single-chip MSP430AFE 253.
6. The wireless temperature measurement system based on micro-energy collection according to claim 5, wherein one channel of the signal processor collects thermocouple voltage, and the other channel collects cold end compensation voltage for cold end compensation.
7. The wireless thermometry system based on micro-energy harvesting of claim 6, wherein the signal processor uses Cu50 for cold end compensation.
8. The wireless temperature measurement system based on micro-energy collection according to claim 1, wherein the energy collection unit adopts an ADP5091 chip.
9. The wireless temperature measurement system based on micro-energy collection according to claim 8, wherein the ADP5091 chip is provided with three power input ends and two power output ends;
the three power input ends are respectively a VIN pin, a BACKUP pin and a BAT pin, the VIN pin is used as a main power input, and the BAT pin is used as a rechargeable system power input and is externally connected with a capacitor or a battery; the BACKUP pin is used for externally connecting an additional battery;
the two power supply output ends are respectively an SYS pin and an REG _ OUT pin, the SYS pin is used for supplying power to the ADP5091 chip, and the REG _ OUT pin is used as a main power supply path of the acquisition module (2).
10. The wireless temperature measurement system based on micro-energy collection according to claim 1, wherein the data repeater adopts STM32F103RCT6 chip.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109900375A (en) * | 2019-03-22 | 2019-06-18 | 陕西科技大学 | A kind of wireless temperature measurement system and its temp measuring method and application based on micro-energy acquisition |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109900375A (en) * | 2019-03-22 | 2019-06-18 | 陕西科技大学 | A kind of wireless temperature measurement system and its temp measuring method and application based on micro-energy acquisition |
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Granted publication date: 20200407 Termination date: 20210322 |