CN207366649U - A kind of wireless refrigerator performance detection data harvester - Google Patents
A kind of wireless refrigerator performance detection data harvester Download PDFInfo
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- CN207366649U CN207366649U CN201720918966.2U CN201720918966U CN207366649U CN 207366649 U CN207366649 U CN 207366649U CN 201720918966 U CN201720918966 U CN 201720918966U CN 207366649 U CN207366649 U CN 207366649U
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- power supply
- detection data
- performance detection
- collecting unit
- circuit
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Abstract
The utility model discloses a kind of wireless refrigerator performance detection data harvester, including：Main control unit MCU,Indicator light,Power supply and communication interface,Data storage cell,Collecting unit,The main control unit and indicator light,Data storage cell,Power supply and communication interface are connected,The power supply is connected with isolated location,The collecting unit is connected with isolated location,The isolated location is isolated comprising DC DC,Light-coupled isolation and the isolation of magnetic coupling,The collecting unit includes AD conversion,Cold junction compensation,Bleeder circuit,Difference analogue passage,Bias clamper filter circuit,Ten road analog input channels,LED light is provided with the refrigerator,The collecting unit includes temperature acquisition,Power collecting and optical receiving circuit,Present apparatus measurement temperature scope is wide,It is small by such environmental effects,Applicable industrial site is relatively more,Measurement accuracy is higher,Include various compensation circuits,Filter circuit,It is disturbed small,Carry voltage detecting,Breaking short-circuit detecting,Effective judgment means working status.
Description
Technical field：
A kind of detection device technology field is the utility model is related to, is specially a kind of wireless refrigerator performance detection data collection
Device.
Background technology：
At present, refrigerator device for detecting performance is broadly divided into two major classes, is surveyed using external perimysium reference measurement data and using internal
Measure data.
Externally measured is traditional measurement method, that is, is supplied to refrigerator normal voltage, goes to measure using exterior sensor
The power consumption and cryogenic temperature curve of refrigerator, the results of property of refrigerator is judged according to the consumption energy and refrigeration effect.With household electrical appliances
Intelligentized updating, the overall understanding to refrigerator performance can not be completed, it is necessary to strengthen refrigerator itself by relying solely on externally measured data
Detectability.
Internal measurement mainly utilizes the measurement data of refrigerator itself, and simultaneous selection combines externally measured data, thus
What is gone out is more careful, accurately test result.
Utility model content：
The utility model aim is to propose a kind of wireless refrigerator performance detection data harvester, in order to solve using interior
Often plugged during portion's measurement data connection cause circuit damage and loose contact in the case of caused various problems the problems such as.
The technical solution of the utility model is：A kind of wireless refrigerator performance detection data harvester, including：Main control unit
MCU, indicator light, power supply and communication interface, data storage cell, collecting unit, the main control unit and indicator light, data storage
Unit, power supply and communication interface are connected, and the power supply is connected with isolated location, and the collecting unit is connected with isolated location, institute
State isolated location and include DC-DC isolation, light-coupled isolation and the isolation of magnetic coupling, the collecting unit includes AD conversion, cold junction compensation, divides
Volt circuit, difference analogue passage, bias clamper filter circuit, ten road analog input channels, and LED lamps are provided with the refrigerator,
The collecting unit includes temperature acquisition, power collecting and optical receiving circuit.
Preferably, in power supply processing, extraneous offer any DC voltages of 8V~24V are only needed, the present apparatus is first with common mode electricity
Sense is filtered, then carries out voltage stabilizing output fixed value voltage with switching power source chip, is powered for device, and pass through DC isolated power supplies
Isolation voltage stabilizing is carried out again and is used for collecting unit to provide high stability power supply, and collecting unit also can measure voltage in real time to ensure
Whole power-supply system normal table.
Preferably, in collecting unit, high resolution measurement is realized by high-precision AD sampling A/D chips, then coordinate chip
Built-in instrument amplifier and high precision reference power supply realizes that voltage accurately measures, in whole analog measuring circuit, every grade
In terms of cold junction compensation measurement, high-precision fixed value resistance and platinum resistance are flowed through using constant-current source by low-pass filter for cascade,
Voltage swing is shared with differential mode survey calculation fixed value resistance and platinum resistance, can be calculated accurate resistance value again by tabling look-up
Mode obtains accurate cold junction temperature.
Preferably, the AD conversion chip is measured by differential mode, carries constant-current source and instrument amplifier, and interior
High-precision reference reference voltage is put.
Preferably, the cold junction compensation is divided into the onboard compensation of two-wire system and the external compensation of four-wire system, and drive circuit is using permanent
Stream driving, temperature-measuring element is platinum resistance, is high-accuracy resistance with reference to resistance is compared.
Preferably, the power supply is direct current, and the present apparatus includes Type of Switch Stabilivolt Source Circuit, is subjected to 8V~24V direct currents
Electricity.
Preferably, the communication interface is communicated using serial bus standard RS-485 modes.
Preferably, the indicator light includes power supply indicator, and run indicator, communicate indicator light, malfunction indicator lamp.
Compared with prior art, the utility model has the advantages that：
1. present apparatus measurement temperature scope is wide, small by such environmental effects, it is relatively more to be applicable in industrial site.
2. present apparatus measurement accuracy is higher, comprising various compensation circuits, filter circuit, is disturbed small.
3. the present apparatus carries voltage detecting, breaking short-circuit detecting, effective judgment means working status.
4. the present apparatus carries storage device, measurement end temperature dynamic situation can be reduced in real time, it is maximum with reference to own database
Degree reduces the dynamic response situation for treating testing temperature.
Brief description of the drawings：
Fig. 1 is the structure diagram of the utility model.
In figure：1. main control unit；2. power supply and communication interface；3. data storage cell；4. collecting unit；5. indicator light；
6. server；7. refrigerator.
Embodiment：
The present invention is further described with reference to the accompanying drawings and examples, it is clear that described embodiment is only this reality
With new part of the embodiment, instead of all the embodiments.Based on the embodiment in the utility model, ordinary skill
Personnel's all other embodiments obtained without making creative work, belong to the model of the utility model protection
Enclose.
Refering to Figure 1, the utility model provides a kind of technical solution：A kind of wireless refrigerator performance detection data collection
Device, including：Main control unit MCU1, indicator light 5, power supply and communication interface 2, data storage cell 3, collecting unit 4, the master
Unit 1 and indicator light 5, data storage cell 3 are controlled, power supply and communication interface 2 are connected, and the power supply is connected with isolated location, institute
State collecting unit 4 with isolated location to be connected, the isolated location includes DC-DC isolation, light-coupled isolation and the isolation of magnetic coupling, described to adopt
It is defeated comprising AD conversion, cold junction compensation, bleeder circuit, difference analogue passage, biasing clamper filter circuit, the simulation of ten tunnels to collect unit 4
Enter passage, LED light is provided with the refrigerator 7, the collecting unit 4 includes temperature acquisition, power collecting and light-receiving electricity
Road.
Operation principle：During work, corresponding DC power supply need to be only supplied to the present apparatus, corresponding ten passages can be connected arbitrarily
Or thermocouple wire is all connected, the measurement end of thermocouple wire, which is placed on environment or object to be measured, can accurately measure required survey
Amount temperature, measurement data is read by RS-485 interfaces.
While there has been shown and described that the embodiment of the utility model, for the ordinary skill in the art,
It is appreciated that these embodiments can be carried out with a variety of changes in the case where not departing from the principle of the utility model and spirit, repaiied
Change, replace and modification, the scope of the utility model are defined by the appended claims and the equivalents thereof.
Claims (7)
1. a kind of wireless refrigerator performance detection data harvester, including：Main control unit MCU (1), indicator light (5), power supply and logical
Believe interface (2), data storage cell (3), collecting unit (4), the main control unit (1) and indicator light (5), data storage cell
(3), power supply and communication interface (2) are connected, and the power supply is connected with isolated location, the collecting unit (4) and isolated location phase
Even, the isolated location includes DC-DC isolation, light-coupled isolation and the isolation of magnetic coupling, the collecting unit (4) and includes AD conversion, cold
End compensating, bleeder circuit, difference analogue passage, biasing clamper filter circuit, ten road analog input channels, the refrigerator (7) are interior
LED light is provided with, the collecting unit (4) includes temperature acquisition, power collecting and optical receiving circuit.
A kind of 2. wireless refrigerator performance detection data harvester according to claim 1, it is characterised in that：It is single in collection
In first (4), high resolution measurement is realized by high-precision AD sampling A/D chips, then coordinate the instrument amplifier of built-in chip type
Realize that voltage accurately measures with high precision reference power supply, in whole analog measuring circuit, every grade of cascade by low-pass filter,
In terms of cold junction compensation measurement, high-precision fixed value resistance and platinum resistance are flowed through using constant-current source, with differential mode survey calculation
Fixed value resistance and platinum resistance share voltage swing, can be calculated accurate resistance value and obtain accurate cold end temperature by lookup table mode again
Degree.
A kind of 3. wireless refrigerator performance detection data harvester according to claim 2, it is characterised in that：The AD turns
Change chip to measure by differential mode, carry constant-current source and instrument amplifier, and built-in high-precision reference reference voltage.
A kind of 4. wireless refrigerator performance detection data harvester according to claim 1, it is characterised in that：The cold end
Compensation is divided into the onboard compensation of two-wire system and the external compensation of four-wire system, drive circuit are driven using constant current, and temperature-measuring element is platinum
Resistance, is high-accuracy resistance with reference to resistance is compared.
A kind of 5. wireless refrigerator performance detection data harvester according to claim 1, it is characterised in that：The power supply
And the power supply of communication interface (2) is direct current, the present apparatus includes Type of Switch Stabilivolt Source Circuit, is subjected to 8V~24V direct currents.
A kind of 6. wireless refrigerator performance detection data harvester according to claim 1, it is characterised in that：The power supply
And communication interface (2) is communicated using serial bus standard RS-485 modes.
A kind of 7. wireless refrigerator performance detection data harvester according to claim 1, it is characterised in that：The instruction
Lamp (5) includes power supply indicator, and run indicator, communicate indicator light, malfunction indicator lamp.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720918966.2U CN207366649U (en) | 2017-07-27 | 2017-07-27 | A kind of wireless refrigerator performance detection data harvester |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720918966.2U CN207366649U (en) | 2017-07-27 | 2017-07-27 | A kind of wireless refrigerator performance detection data harvester |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207366649U true CN207366649U (en) | 2018-05-15 |
Family
ID=62421679
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720918966.2U Active CN207366649U (en) | 2017-07-27 | 2017-07-27 | A kind of wireless refrigerator performance detection data harvester |
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| CN (1) | CN207366649U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112097463A (en) * | 2020-09-07 | 2020-12-18 | 海信容声(广东)冰箱有限公司 | Refrigerator control method and device |
-
2017
- 2017-07-27 CN CN201720918966.2U patent/CN207366649U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112097463A (en) * | 2020-09-07 | 2020-12-18 | 海信容声(广东)冰箱有限公司 | Refrigerator control method and device |
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