CN209432294U - Temperature detection system - Google Patents
Temperature detection system Download PDFInfo
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- CN209432294U CN209432294U CN201920216614.1U CN201920216614U CN209432294U CN 209432294 U CN209432294 U CN 209432294U CN 201920216614 U CN201920216614 U CN 201920216614U CN 209432294 U CN209432294 U CN 209432294U
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- 238000001514 detection method Methods 0.000 title claims abstract description 14
- 238000012360 testing method Methods 0.000 claims abstract description 81
- 238000012545 processing Methods 0.000 claims abstract description 50
- 238000002955 isolation Methods 0.000 claims abstract description 42
- 238000013021 overheating Methods 0.000 claims description 31
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 claims description 19
- 229910052744 lithium Inorganic materials 0.000 claims description 19
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- 230000005611 electricity Effects 0.000 claims description 5
- 238000004891 communication Methods 0.000 claims description 4
- 230000000087 stabilizing effect Effects 0.000 claims description 2
- 230000005619 thermoelectricity Effects 0.000 claims description 2
- 230000005622 photoelectricity Effects 0.000 claims 1
- 230000011664 signaling Effects 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 8
- 238000010438 heat treatment Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 3
- 230000002093 peripheral effect Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 239000003292 glue Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000001960 triggered effect Effects 0.000 description 2
- 206010037660 Pyrexia Diseases 0.000 description 1
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- 239000003086 colorant Substances 0.000 description 1
- 238000012937 correction Methods 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 230000010259 detection of temperature stimulus Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000012212 insulator Substances 0.000 description 1
- 238000012806 monitoring device Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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Abstract
The utility model discloses a temperature detecting system, this system includes: the device comprises a main control module, a signal processing module, a display module and a thermocouple; when the current temperature value of the device to be tested is greater than the preset overheat protection temperature value, the device to be tested stops outputting signals to the signal isolation sub-module; the signal isolation submodule detects the state change of the output signal of the device to be tested and generates an interrupt signal; the thermocouple sends the detected current temperature value to the signal processing submodule; the signal processing submodule converts the current temperature value into a corresponding digital quantity and sends the digital quantity to the main control module; and when the main control module detects the interrupt signal, the corresponding current temperature value is sent to the display module to be displayed. The utility model discloses an accurate detection to the actual overheat protection temperature value of device under test to and need not the manual work and read the record to current temperature value, guaranteed current temperature value's accuracy.
Description
Technical field
The utility model embodiment is related to temperature detection technology more particularly to a kind of system for detecting temperature.
Background technique
Device overtemperature protection temperature test is must can not in power electron-like device (referred to as, power device) analysis experiment
Few test item.For example, (devices such as (Integrated Circuit, IC), current limiting switch, are working charge integrated circuit
Itself can generate heat in the process, and especially under full load conditions, fever can be even more serious, when power device reaches a certain temperature,
Power device can trigger overheating protection, and turn off output, avoid the accident caused by high temperature.Therefore, power device is accurately obtained
Overheating protection temperature value there is important reference significance to the thermal design and product safety in R & D of complex.
The existing overheating protection temperature test mode for power device is: by power device to be measured (referred to as to
Survey device) be welded to test platelet, thermocouple is adhered to the surface of device under test with glue, and be connected to temperature measuring set and
Power supply is connected, then device under test band is fully loaded starts to work, then the chip position continuous heating of device under test, oscillography
The output situation of device monitoring device under test.When heating temperature has reached overheating protection temperature value, the output of device under test is turned off,
Oscillograph detects that output signal is fallen, record current temperature value shown by temperature measuring set at this time, as device under test
Practical overheating protection temperature value.
But there are multiple problems will lead to data measured in existing test mode, there are errors.Firstly, thermometric is tested
In the temperature measuring set that generallys use be hand-held multichannel temperature logger, but the precision of such equipment is at 1 DEG C or so, and samples frequency
Rate is 3 seconds/time, since device under test temperature rise per second may reach tens of degree, it is clear that 3 seconds/time of sample frequency far can not
Reflect the true temperature of device under test output shutdown moment, leading to read data, there are errors；Secondly, showing from observing
Wave device exports drop signal, to be measured within the time period to reading shown by temperature measuring set between data there are the time difference
Device is constantly in heated condition, then read-out temperature value should be slightly above practical overheating protection temperature value, causes read-out
There are errors for temperature value；Finally, in temperature detection process, to device under test heat with read it is shown on temperature measuring set
Temperature is required to manual operation, needs two people under normal circumstances while cooperating, and efficiency is lower, and artificially makes a copy of temperature value appearance
Easily there is subjective judgement and mistake.
Utility model content
In view of this, the present invention provides a kind of system for detecting temperature, the practical overheat for realizing device under test is protected
Protect the accurate detection of temperature value.
In a first aspect, the utility model embodiment provides a kind of system for detecting temperature, comprising: at main control module, signal
Manage module, display module and thermocouple；The signal processing module includes signal processing submodule and signal isolation submodule；
The thermocouple is pasted on the surface of device under test, and the thermocouple is connect with the signal processing submodule, institute
Signal isolation submodule is stated to connect with the device under test, the main control module respectively with the signal processing submodule, described
Signal isolation submodule is connected with the display module；
When the current temperature value of the device under test is greater than default overheating protection temperature value, the device under test stop to
The signal isolation submodule output signal；The signal isolation submodule detects the state of the device under test output signal
Variation, then generate interrupt signal；The current temperature value that the thermocouple will test is sent to the signal processing submodule；Institute
It states signal processing submodule and current temperature value is converted into corresponding digital quantity, and the digital quantity is sent to the master control mould
Block；When the main control module detects the interrupt signal, the digital quantity is converted into corresponding current temperature value, and send
It is shown to the display module.
Further, the system for detecting temperature further include: power module, the power module respectively with the master control mould
Block, the signal processing submodule and signal isolation submodule connection；
The power module is defeated to the main control module, the signal processing submodule and the signal isolation submodule
Voltage signal out.
Further, the power module includes: charging circuit, lithium battery and voltage regulator circuit；
The charging circuit is connect with the lithium battery, and the lithium battery is connect with the voltage regulator circuit, the pressure stabilizing electricity
Road is connect with the main control module, the signal processing submodule and the signal isolation submodule respectively；
For the charging circuit for lithium battery charging, the voltage signal that the voltage regulator circuit exports the lithium battery is steady
Output is to the main control module, the signal processing submodule and the signal isolation submodule after pressure.
Further, the system for detecting temperature further include: sound and light signal module；The sound and light signal module includes double-colored
LED light and buzzer；The dual-colored LED lamp and buzzer are connected to the main control module.
Further, the signal isolation submodule includes: signal deteching circuit and photoelectric coupling circuit；
One end of the photoelectric coupling circuit is connect with device under test, and one end of the other end and the signal deteching circuit connects
It connects；The other end of the signal deteching circuit is connected to the main control module.
Further, the signal deteching circuit includes: the first triode, first resistor and second resistance；
The base stage of first triode is connect with one end of the first resistor, the collector of first triode with
One end of the second resistance connects, the emitter ground connection of first triode；The other end of the first resistor and second
The other end of resistance is connect with the power module.
Further, the photoelectric coupling circuit includes: photoelectrical coupler and 3rd resistor；
One end of the first end of the photoelectrical coupler and 3rd resistor connects, the second end of the photoelectrical coupler and the
Three ends are grounded, and the 4th end of the photoelectrical coupler is connect with the signal deteching circuit；The other end of the 3rd resistor
It is connect with the device under test.
Further, the signal processing submodule includes serial peripheral equipment interface SPI interface, the signal processing submodule
Serial communication is carried out by SPI interface and the main control module.
Further, the thermocouple is K-type thermocouple.
Further, the display module is Organic Light Emitting Diode OLED display circuit.
When the utility model is greater than default overheating protection temperature value by the current temperature value in device under test, device under test
Stop to input signal insulator module output signal；Input signal isolation submodule detects the shape of device under test output signal
State variation, then generate interrupt signal；Then when main control module detects interrupt signal, the Current Temperatures that thermocouple detects are recorded
Value, and it is sent to the technical solution that display module is shown, when thermocouple detects that temperature changes, thermocouple is treated
The current temperature value for surveying device is acquired, and acquisition rate is high；Also, it is greater than in the current temperature value of device under test and preset
When Thermal protection temperature value, main control module records current temperature value at once, to read, temperature is no-delay and thermograph essence
Really, to realize the accurate detection of the practical overheating protection temperature value of device under test, and without manually to Current Temperatures
Value is read out record, ensure that the accuracy of current temperature value.
Detailed description of the invention
Fig. 1 is a kind of structural block diagram of system for detecting temperature provided by the embodiment of the utility model；
Fig. 2 is the structural block diagram of another system for detecting temperature provided by the embodiment of the utility model；
Fig. 3 is a kind of connection schematic diagram of signal processing circuit provided by the embodiment of the utility model；
Fig. 4 is a kind of connection schematic diagram of signal isolation submodule provided by the embodiment of the utility model.
Specific embodiment
The utility model is described in further detail with reference to the accompanying drawings and examples.It is understood that herein
Described specific embodiment is used only for explaining the utility model, rather than the restriction to the utility model.It further needs exist for
It is bright, part relevant to the utility model is illustrated only for ease of description, in attached drawing rather than entire infrastructure.
Fig. 1 is a kind of structural block diagram of system for detecting temperature provided by the embodiment of the utility model, and the present embodiment is suitable for
The default overheating protection temperature value of device under test is detected, to determine the feelings of the true overheating protection temperature value of device under test
Condition.With reference to Fig. 1, which is specifically included: main control module 110, signal processing module 120, display module 130 and heat
Galvanic couple 140；Signal processing module 120 includes signal processing submodule 1201 and signal isolation submodule 1202；Certainly, implementing
In example, the system for detecting temperature further include: device under test 150.
Wherein, thermocouple 140 is pasted on the surface of device under test 150, and thermocouple 140 and signal processing submodule 1201 connect
Connect, signal isolation submodule 1202 is connect with device under test, main control module 110 respectively with signal processing submodule 1201, signal
Submodule 1202 is isolated and display module 130 connects；
When the current temperature value of device under test 150 is greater than default overheating protection temperature value, device under test 150 stops to letter
Number isolation 1202 output signal of submodule；Signal isolation submodule 1202 detects that the state of 150 output signal of device under test becomes
Change, then generates interrupt signal；The current temperature value that thermocouple 140 will test is sent to signal processing submodule 1201；Signal
It handles submodule 1201 and current temperature value is converted into corresponding digital quantity, and digital quantity is sent to main control module 110；Master control
Module 110 is converted to corresponding current temperature value when detecting interrupt signal, by digital quantity, and is sent to display module 130
It is shown.
Wherein, interrupt signal can be understood as low level signal.When device under test 150 stop it is defeated to signal isolation submodule
Out when signal, main control module 110 detects that the state of the input signal of signal isolation submodule 1201 is switched by high level signal
For low level signal, so that input signal detected by main control module 110 is low level signal.In embodiment, by thermoelectricity
Even 140 are pasted on the surface of device under test 150, when thermocouple 140 detects that temperature changes, due to the spy of self structure
Point can directly measure the temperature of device under test 150, and temperature signal is converted to corresponding thermo-electromotive force signal, by electrical
Instrument is converted into the temperature of device under test 150, and temperature value is then sent to signal processing submodule 1201.Wherein, thermocouple
140 be K-type thermocouple.Meanwhile signal processing submodule 1201 uses MAX6675 as its main control chip, since MAX6675 is
The serial K-type thermocouple analog-digital converter that included cold junction compensation, linearity correction, thermocouple short-term detect, temperature resolution capability
It is 0.25 DEG C, cold junction compensation range is -20~+80 DEG C, and output data is 16, and wherein 12-bit data are temperature transition value, can
Accurately to convert temperature value to corresponding digital quantity, and maximum temperature values are corresponded to up to 1023.75 DEG C, so as to meet
Measure the demand of device under test overheating protection temperature.Meanwhile signal processing submodule 1201 includes Serial Peripheral Interface (SPI) (Serial
Peripheral Interface, SPI) interface, signal processing submodule 1201 passes through SPI interface and main control module 110 carries out
Serial communication.It is to be understood that MAX6675 carries simple SPI interface, serial communication is carried out with main control module 110, by conversion
Digital quantity is sent to main control module 110.Wherein, main control module 110 is using 16 single-chip microcontroller MSP430 series of super low-power consumption
MSP430G2553, after main control module 110 detects the digital quantity that MAX6675 is sent, by converting the digital quantity to be corresponding
Temperature value, and the temperature value is shown to display module 130.
It is detected in the default overheating protection temperature value of device under test 150, and determines the default overheating protection temperature
When whether value is accurate, heat gun device under test 150 can be used to carry out continuous heating, when device under test 150 detects itself
When current temperature value is greater than default overheating protection temperature value, the shutdown output of automatic trigger device under test 150, i.e. device under test 150
It stops working, so that device under test 150 stops to 1202 output signal of signal isolation submodule connected.Due to signal isolation
Submodule 1202 can not detect that the state of input signal becomes low level signal from high level signal, and the input of itself is caused to be believed
Number state moment changes, so that the external interrupt of main control module 110 is triggered, at this point, main control module 110 records thermocouple
140 current temperature values detected, and display module 130 is sent by the temperature value to show.Wherein, the Current Temperatures
Value can be understood as the practical overheating protection temperature value of device under test 150, the practical overheating protection temperature value may with preset
Thermal protection temperature value is consistent, it is also possible to have deviation, but the practical overheating protection temperature value for default overheating protection temperature value
It will be to the full extent close to the actual overheating protection temperature of device under test 150.Wherein, display module 130 can be organic light emission
Diode (Organic Light-Emitting Diode, OLED) display circuit.Wherein, external interrupt is when certain external thing
When part occurs, the interruption system of single-chip microcontroller will force central processing unit (Central Processing Unit, CPU) pause just
In the program of execution.In embodiment, it can be understood as, due to device under test 150 stop it is defeated to signal isolation submodule 1202
Signal out, the interruption system of main control module 110 force the processing of CPU pause device under test output signal.Wherein, signal isolation
Submodule 1202 is isolated by the output of device under test 150 and the input of main control module 110, ensure that device under test 150 is stopping
When 1202 output signal of submodule is isolated to input restricting the number, avoid system for detecting temperature because the moment of status input signal changes,
And influence the normal work of system for detecting temperature, that is, it ensure that the safety of system for detecting temperature.
The technical solution of the present embodiment is greater than default overheating protection temperature value by the current temperature value in device under test
When, device under test stops to signal isolation submodule output signal；Signal isolation submodule detects device under test output signal
State change, then generate interrupt signal；Then when main control module detects interrupt signal, record thermocouple detects current
Temperature value, and it is sent to the technical solution that display module is shown, when thermocouple detects that temperature changes, thermocouple
The current temperature value of device under test is acquired, and acquisition rate is high；Also, it is greater than in the current temperature value of device under test pre-
If main control module records current temperature value at once when overheating protection temperature value, to read, temperature is no-delay and thermograph
Accurately, to realize the accurate detection of the practical overheating protection temperature value of device under test, and without manually to current temperature
Angle value is read out record, ensure that the accuracy of current temperature value.
Fig. 2 is the structural block diagram of another system for detecting temperature provided by the embodiment of the utility model.The present embodiment be
On the basis of above-described embodiment, further embody is made to system for detecting temperature.With reference to Fig. 2, which is also wrapped
It includes: power module 160, sound and light signal module 170.Wherein, power module 160 includes: charging circuit 1601,1602 and of lithium battery
Voltage regulator circuit 1603；Sound and light signal module 170 includes dual-colored LED lamp 1701 and buzzer 1702；Dual-colored LED lamp 1701 and buzzing
Device 1702 is connect with main control module 110.
Wherein, power module 160 respectively with main control module 110, signal processing submodule 1201 and signal isolation submodule
Block 1202 connects；Charging circuit 1601 is connect with lithium battery 1602, and lithium battery 1602 is connect with voltage regulator circuit 1603, voltage regulator circuit
1603 connect with main control module 110, signal processing submodule 1201 and signal isolation submodule 1202 respectively；
For charging circuit 1601 for the charging of lithium battery 1602, the voltage signal that voltage regulator circuit 1603 exports lithium battery 1602 is steady
Output is to main control module 110, signal processing submodule 1201 and signal isolation submodule 1202 after pressure.
In embodiment, power module 160 includes: charging circuit 1601, lithium battery 1602 and voltage regulator circuit 1603, is used for
Stable voltage signal is exported to the modules in system for detecting temperature.Wherein, TP5100 work can be used in charging circuit 1601
For charge integrated circuit (Integrated Circuit, IC) chip, charging current can reach 2A；Lithium battery 1602 can be used
The two concatenated modes of section poly-lithium battery, it is possible to provide the output of highest 8.4V voltage；Voltage regulator circuit 1603 uses AMS1117-
The low pressure difference linear voltage regulator (Low Dropout Regulator, LDO) of 3.3V, to be each in the system for detecting temperature
The burning voltage of module offer 3.3V.
Wherein, dual-colored LED lamp 1701 is that one kind can be with the LED light of bright two kinds of colors, for example, color can be green and red
Color.When receiving different signals, dual-colored LED lamp 1701 issues the light of corresponding color.In embodiment, work as device under test
When 150 current temperature value is greater than default overheating protection temperature value, current temperature that main control module 110 detects thermocouple 140
Angle value is sent to display module 130 and is shown, while it is constant to keep the current temperature value to show on display module 130, together
When, the color of dual-colored LED lamp 1701 is switched to red by green, and buzzer 1702 sounds the alarm, to prompt work people
Member records the shown current temperature value on display module 130.It is to be understood that the current temperature value is in maximum journey
Close to the actual overheating protection temperature value of device under test 150 on degree.
It should be noted that in system for detecting temperature as shown in Figure 2, except thermocouple 140 and device under test 150 are
External device, remaining module can be used as a kind of temperature-detecting device.And power module 160 is used for in temperature-detecting device
Modules export stable voltage signal, to provide operating voltage for modules, guarantee the normal work of modules.
Meanwhile built-in lithium battery 1602 and charging circuit 1601 in temperature-detecting device, guarantee primary charging for temperature detection dress
Reuse is set, and small in size, use easy to remove.Fig. 3 is a kind of signal processing electricity provided by the embodiment of the utility model
The connection schematic diagram on road.Wherein, signal processing circuit of the signal processing submodule 1201 using MAX6675 as main control chip,
And main control module 110 uses MSP430G2553 as its main control chip.Fig. 3 shows the main control chip of signal processing circuit
The connection relationship between foot is separated in the middle part of the main control chip U2 of U1 and main control module 110.As shown in figure 3, signal processing circuit
T- and T+ pin in U1 accesses thermocouple wire, and VCC pin is connected with the first electricity at the vdd terminal of connection voltage regulator circuit 1603
Hold C1, first capacitor C1 be decoupling capacitance, be in order to prevent front and back circuital current size variation when, in voltage regulator circuit 1603
Current fluctuation is formed by have an impact the normal work of the main control module corresponding circuits.Meanwhile the SCK of main control chip U1 draws
Foot provides clock signal for data transmission, and CS is chip selection signal, and SO is data output signal；Meanwhile the SCK of main control chip U1,
CS, SO pin are connect with SCK, SSB, MOSI pin of the main control chip U2 of main control module 110 respectively.
Fig. 4 is a kind of connection schematic diagram of signal isolation submodule provided by the embodiment of the utility model.As shown in figure 4,
Signal isolation submodule 1202 includes: signal deteching circuit 12021 and photoelectric coupling circuit 12022；Wherein, photoelectric coupling circuit
12022 one end is connect with device under test 150, and the other end is connect with one end of signal deteching circuit 12021；Signal deteching circuit
12021 other end is connect with main control module 110.
Wherein, signal deteching circuit 12021 includes: the first triode Q1, first resistor R1 and second resistance R2；One or three
The base stage of pole pipe Q1 is connect with one end of first resistor R1, and the collector of the first triode Q1 and one end of second resistance R2 connect
It connects, the emitter ground connection of the first triode Q1；The other end of the other end of first resistor R1 and second resistance R2 with power supply mould
Block 160 connects.Wherein, it is the VDD for exporting burning voltage signal that the other end of second resistance R2 is connect with power module 160
Pin.
Photoelectric coupling circuit 12022 includes: photoelectrical coupler U3 and 3rd resistor R3；Wherein, the of photoelectrical coupler U3
One end is connect with one end of 3rd resistor R3, and the second end of photoelectrical coupler U3 and third end are grounded, photoelectrical coupler U3's
4th end is connect with signal deteching circuit 12021；The other end of 3rd resistor R3 is connect with device under test 150.
In embodiment, the signal detection end of main control module 110 is drawn high by second resistance R2, passes through the first triode Q1
Control the low and high level at signal detection end.Meanwhile the pin 4 of photoelectrical coupler U3 is drawn high by first resistor R1, device under test
150 output accesses the pin 1 of photoelectrical coupler U3 by 3rd resistor R3.When photoelectric coupling circuit 12022 has signal input
When, the pin 1 of photoelectrical coupler U3 is connected to pin 2, and the inside light-sensitive device of photoelectrical coupler 12022 is triggered at this time, light
The pin 4 of electric coupler U3 is connected to pin 3, and the base voltage of the first triode Q1 is pulled low, and the first triode Q1, which enters, to be cut
Only state, signal detection end are raised, and main control module 110 detects high level signal；When device under test 150, which exports, to be turned off,
Photoelectric coupling circuit 12022 is inputted without signal, and the pin 4 of photoelectrical coupler can not be connected to pin 3, the first triode Q1's
Base voltage is raised, and the first triode Q1 conducting, signal detection end is pulled low, and main control module 110 detects low level signal.
Illustratively, by taking device under test 150 is current limiting switch as an example, current limiting switch is detected to by system for detecting temperature
Practical overheating protection temperature value be illustrated.Firstly, the electric current for completing system for detecting temperature is built, thermocouple 140 is used into glue
Water adheres to the surface that current limliting is opened the light, 140 cut-in temperature detection device of thermocouple, the output VOUT pin and GND of current limiting switch
Pin is linked into the signal detection input terminal of temperature-detecting device.Then, the input of current limiting switch chip is connected, and with full
It carries, then upper electricity operation.That opens temperature-detecting device starts to detect the temperature change of current limiting switch, while using heat gun
It constantly heats to current limiting switch, the temperature of current limiting switch constantly rises at this time, so that temperature-detecting device is detected and shown
Temperature value also constantly rises, and when the current temperature value of current limiting switch reaches default overheating protection temperature value, current limiting switch is automatic
Shutdown output, i.e. current limiting switch stop output signal, and the current temperature value of current limiting switch is sent to aobvious by main control module 110 at this time
Show that module 130 is shown, while the color of dual-colored LED lamp 1701 is switched to red by green and buzzer 1702 issues
Alarm, to prompt staff to record the current temperature value of current limiting switch, using the practical overheat guarantor as current limiting switch
Protect temperature value.Using the technical solution of the present embodiment, the practical overheating protection temperature value of device under test is detected, when to be measured
When the current temperature value of device reaches default overheating protection temperature value, device under test automatically shuts down output, that is, stops examining to temperature
Device output signal is surveyed, the status input signal of signal isolation submodule occurs moment change, triggers in the outside of main control module
It is disconnected, while the current temperature value that thermocouple detects is sent to display module and shown by main control module, and on the display module
It keeps the display of current temperature value not change, so that temperature acquisition rate is high and reading current temperature value is not delayed, guarantees
Current temperature value record is accurate.Meanwhile have dual-colored LED lamp and buzzer to staff remind, be conducive to staff and
When stop device under test heating, avoid device under test from doing excessive high-temperature damage, and do not need oscillograph to temperature value
It is shown, has saved hardware cost.Meanwhile being not required to staff and shown current temperature value is observed, it saves
Human cost.
In the description of this specification, reference term " one embodiment ", " some embodiments ", " example ", " specifically show
The description of example " or " some examples " etc. means specific features, structure, material or spy described in conjunction with this embodiment or example
Point is contained at least one embodiment or example of the utility model.In the present specification, to the schematic table of above-mentioned term
Stating may not refer to the same embodiment or example.Moreover, particular features, structures, materials, or characteristics described can be
It can be combined in any suitable manner in any one or more embodiment or examples.
Note that above are only the preferred embodiment and institute's application technology principle of the utility model.Those skilled in the art's meeting
Understand, the utility model is not limited to specific embodiment described here, is able to carry out for a person skilled in the art various bright
Aobvious variation, readjustment and substitution is without departing from the protection scope of the utility model.Therefore, although passing through above embodiments
The utility model is described in further detail, but the utility model is not limited only to above embodiments, is not departing from
It can also include more other equivalent embodiments in the case that the utility model is conceived, and the scope of the utility model is by appended
Scope of the claims determine.
Claims (10)
1. a kind of system for detecting temperature characterized by comprising main control module, signal processing module, display module and thermoelectricity
It is even；The signal processing module includes signal processing submodule and signal isolation submodule；
The thermocouple is pasted on the surface of device under test, and the thermocouple is connect with the signal processing submodule, the letter
Number isolation submodule connect with the device under test, the main control module respectively with the signal processing submodule, the signal
Isolation submodule is connected with the display module；
When the current temperature value of the device under test is greater than default overheating protection temperature value, the device under test stops to described
Signal isolation submodule output signal；The signal isolation submodule detects that the state of the device under test output signal becomes
Change, then generates interrupt signal；The current temperature value that the thermocouple will test is sent to the signal processing submodule；It is described
Current temperature value is converted to corresponding digital quantity by signal processing submodule, and the digital quantity is sent to the master control mould
Block；When the main control module detects the interrupt signal, the digital quantity is converted into corresponding current temperature value, and send
It is shown to the display module.
2. system for detecting temperature according to claim 1, which is characterized in that further include: power module, the power module
It is connect respectively with the main control module, the signal processing submodule and the signal isolation submodule；
The power module exports electricity to the main control module, the signal processing submodule and the signal isolation submodule
Press signal.
3. system for detecting temperature according to claim 2, which is characterized in that the power module includes: charging circuit, lithium
Battery and voltage regulator circuit；
The charging circuit is connect with the lithium battery, and the lithium battery is connect with the voltage regulator circuit, the voltage regulator circuit point
It is not connect with the main control module, the signal processing submodule and the signal isolation submodule；
The charging circuit is lithium battery charging, after the voltage signal pressure stabilizing that the voltage regulator circuit exports the lithium battery
It exports to the main control module, the signal processing submodule and the signal isolation submodule.
4. system for detecting temperature according to claim 1, which is characterized in that further include: sound and light signal module；The acousto-optic
Signaling module includes dual-colored LED lamp and buzzer；The dual-colored LED lamp and buzzer are connected to the main control module.
5. system for detecting temperature according to claim 1, which is characterized in that the signal isolation submodule includes: signal
Detection circuit and photoelectric coupling circuit；
One end of the photoelectric coupling circuit is connect with device under test, and the other end is connect with one end of the signal deteching circuit；
The other end of the signal deteching circuit is connected to the main control module.
6. system for detecting temperature according to claim 5, which is characterized in that the signal deteching circuit includes: the one or three
Pole pipe, first resistor and second resistance；
The base stage of first triode is connect with one end of the first resistor, the collector of first triode with it is described
One end of second resistance connects, the emitter ground connection of first triode；The other end and second resistance of the first resistor
The other end connect with power module.
7. system for detecting temperature according to claim 5, which is characterized in that the photoelectric coupling circuit includes: photoelectricity coupling
Clutch and 3rd resistor；
The first end of the photoelectrical coupler and one end of 3rd resistor connect, the second end of the photoelectrical coupler and third end
It is grounded, the 4th end of the photoelectrical coupler is connect with the signal deteching circuit；The other end of the 3rd resistor and institute
State device under test connection.
8. system for detecting temperature according to claim 1, which is characterized in that the signal processing submodule includes serial outer
If interface SPI interface, the signal processing submodule carries out serial communication by SPI interface and the main control module.
9. system for detecting temperature according to claim 1, which is characterized in that the thermocouple is K-type thermocouple.
10. system for detecting temperature according to claim 1, which is characterized in that the display module is organic light-emitting diodes
Pipe OLED display circuit.
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| CN112595981A (en) * | 2020-12-29 | 2021-04-02 | 佛山科学技术学院 | Online monitoring system for storage battery |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112595981A (en) * | 2020-12-29 | 2021-04-02 | 佛山科学技术学院 | Online monitoring system for storage battery |
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