Cov txheej txheem:

Digital Nqus Plua Plav Tswj: 15 Kauj Ruam
Digital Nqus Plua Plav Tswj: 15 Kauj Ruam

Video: Digital Nqus Plua Plav Tswj: 15 Kauj Ruam

Video: Digital Nqus Plua Plav Tswj: 15 Kauj Ruam
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Cov Nqus Plua Plav Regulator
Cov Nqus Plua Plav Regulator
Cov Nqus Plua Plav Regulator
Cov Nqus Plua Plav Regulator

Nov yog Veneer Lub Tshuab Nqus Tsev Xovxwm (Lub Tshuab Nqus Tsev) uas tau hloov kho nrog Lub Tshuab Nqus Tsev Digital kom ua haujlwm nrog lub tshuab nqus tsev xaiv tau. Cov cuab yeej no yog hloov pauv rau Lub Tshuab Nqus Nqus Dej hauv kuv li DIY Veneer Vacuum Press ua nrog cov phiaj xwm los ntawm VeneerSupplies.com lossis JoeWoodworking.com. Cov no yog cov phiaj xwm zoo thiab lub twj tso kua mis ua haujlwm tau zoo heev raws li tau tsim. Txawm li cas los xij, Kuv yog tinkerer, thiab kuv xav txhim kho kuv lub twj tso kua mis nrog lub peev xwm kom yooj yim thiab npaj tau yooj yim tswj qhov ntsuas qhov siab (tsis muaj tus tsav tsheb ntsia hlau) hla qhov dav dav ntawm kev sib zog nrog tus lej tswj hwm tus lej.

Tsis ntev los no, qhov xav tau tshwm sim uas dhau ntawm qhov txwv qis ntawm kuv Lub Tshuab Nqus Nqus (Hom 1). Txoj haujlwm no xav tau Hom 2-Lub Tshuab Nqus Plua Plav rau kev nyuaj siab hauv thaj tsam ntawm 2 txog 10 hauv-Hg. Hloov kuv Hom 1-Lub Tshuab Nqus Tsev nrog Hom 2 qauv yog qhov kev xaiv, txawm li cas los xij, qhov no zoo li tsis muaj txiaj ntsig vim nws xav tau tus nqi ntxiv thiab kev hloov kho kom hloov pauv ntawm ob lub tshuab nqus tsev. Qhov kev daws teeb meem zoo tshaj plaws yog tus tswj hwm ib leeg nrog ntau qhov kev nyuaj siab (2 txog 28 hauv-Hg).

Tus Tswj Lub Tshuab Nqus Tsev: Lub tshuab nqus tsev tswj tau hloov pauv siv los qhib lub tshuab nqus tsev lossis tso tawm ntawm qhov siab xaiv. Lub tshuab nqus tsev muaj cov ntsia hlau hloov kho uas tso cai rau koj hu rau hauv qhov koj xav tau ntawm qib nqus. Kev sib cuag tau ntsuas ntawm 10 amps ntawm 120v AC.

Hom Lub Tshuab Nqus Tsev: Hom 1 = kho tau rau 10.5 "txog 28" ntawm Hg (Sib txawv 2 txog 5 "ntawm Hg) Hom 2 = kho tau rau 2" txog 10 "ntawm Hg (Sib txawv 2 txog 4" ntawm Hg)

Kauj Ruam 1: Tsim Kev Xav

Tsim Kev Xav
Tsim Kev Xav

Kuv tus qauv hloov pauv Lub Tshuab Nqus Tsev nrog Digital Vacuum Regulator (DVR). DVR yuav raug siv los tswj kab LINE-DVR kab ntawm RELAY-30A raws li tau pom hauv Cov Tswj Lub Thaj Tsam loj. Qhov kev tsim qauv no xav tau kev ntxiv AC/DC 5-VDC Lub Hwj Huam Lub Hwj Chim rau Lub Hwj Chim Loj rau lub zog DVR.

Qhov kev tsim no muaj peev xwm tswj hwm ntau lub tshuab nqus tsev, tab sis kev ua tau zoo yog nyob ntawm qhov muaj peev xwm ntawm lub twj tso kua mis. Ntawm qhov qis dua qhov loj CFM lub twj tso kua mis loj yuav tswj cov kev sib zog no, tab sis ua rau muaj qhov sib txawv loj dua qhov siab ua haujlwm vim qhov txav ntawm lub twj tso kua mis. Nov yog rooj plaub rau kuv 3 CFM lub twj tso kua mis. Nws muaj peev xwm tswj tau 3 hauv-Hg, tab sis qhov sib txawv ntawm qhov sib txawv yog ± 1 hauv-Hg, thiab ON mus ntawm lub twj tso kua mis, txawm hais tias tsis tshua muaj tshwm sim, kwv yees li ib lossis ob vib nas this. Qhov sib txawv ntawm qhov sib txawv ntawm ± 1 hauv-Hg yuav ua rau muaj kev sib zog ntawm 141 lbs/ft² txog 283 lbs/ft². Kuv tsis muaj kev paub lub tshuab nqus tsev ntawm cov kev sib zog qis no, yog li kuv tsis paub meej txog qhov tseem ceeb ntawm qhov sib txawv ntawm qhov siab viav vias. Hauv kuv lub tswv yim, lub tshuab nqus tsev CFM me me yuav yog qhov tsim nyog los tswj cov kev nqus nqus qis no thiab txo qis qhov sib txawv ua kom nrawm.

Kev tsim kho ntawm tus tswj hwm no suav nrog Raspberry Pi Zero, MD-PS002 Siab Sensor, HX711 Wheatstone Choj Amplifier Module, LCD Zaub, 5V Lub Hwj Huam, Rotary Encoder thiab Relay Module. Txhua qhov ntawm no yog muaj los ntawm qhov koj nyiam hauv internet cov khoom siv hluav taws xob.

Kuv xaiv Raspberry Pi (RPi) vim hais tias nab hab sej yog kuv hom lus programming, thiab kev txhawb nqa rau RPi tau npaj txhij. Kuv ntseeg tias daim ntawv thov no tuaj yeem xa mus rau ESP8266 lossis lwm tus tswj uas muaj peev xwm khiav tau nab nab. Ib qhov tsis zoo ntawm RPi yog Shutdown tau pom zoo ua ntej ua kom nws nqes los tiv thaiv kev noj nyiaj txiag ntawm SD Card.

Kauj Ruam 2: Daim Ntawv Teev Npe

Cov cuab yeej no tau tsim nrog tshem tawm cov khoom txee suav nrog Raspberry Pi, Siab Sensor, HX711 Choj Amplifier, LCD thiab lwm qhov raug nqi kwv yees li $ 25.

PARTS: 1ea Raspberry Pi Zero-Version 1.3 $ 5 1ea MD-PS002 Lub Tshuab Nqus Plua Plav Tsis Zoo Siab Sensor $ 1.75 1ea HX711 Load Cell thiab Siab sensor 24 ntsis AD module $ 0.75 1ea KY-040 Rotary Encoder Module $ 1 1ea 5V 1.5A 7.5W 7.5W Hloov Lub Hwj Huam 220V AC-DC Step Down Module $ 2.56 1ea 2004 20x4 Character LCD Display Module $ 4.02 1ea 5V 1-Channel Optocoupler Relay Module $ 0.99 1ea Adafruit Perma-Proto Half-sized Breadboard PCB $ 4.50 1ea 2N2222A NPN Transistor $ 0.09 2ea 10K Resistors 1ea Hose Barb Adapter 1/4 "ID x 1/4" FIP $ 3.11 1ea Brass Yeeb Nkab Square Lub Taub Hau Plug 1/4 "MIP $ 2.96 1ea GX12-2 2 Tus Kab Ntsig 12mm Txiv neej & Poj Niam Hlau Vaj Huam Sib Luag Txuas Hluav Taws Xob Hom Ntsia Hlau Hluav Taws Xob Txuas Hluav Taws Xob Plug $ 0.67 1ea Proto Box (lossis 3D Luam)

Kauj Ruam 3: Nqus Sensor Los Ua Ke

Nqus Sensor Los Ua Ke
Nqus Sensor Los Ua Ke
Nqus Sensor Los Ua Ke
Nqus Sensor Los Ua Ke
Nqus Sensor Los Ua Ke
Nqus Sensor Los Ua Ke
Nqus Sensor Los Ua Ke
Nqus Sensor Los Ua Ke

MD-PS002 lub ntsuas hluav taws xob tsim los ntawm Mingdong Technology (Shanghai) Co., Ltd. (MIND) muaj ntau yam ntawm 150 KPa (qhov siab tshaj). Qhov ntsuas qhov ntsuas ntau (ntawm qib hiav txwv) rau lub ntsuas no yuav yog 49 txog -101 KPa lossis 14.5 txog -29.6 hauv -Hg. Cov ntsuas no tau npaj muaj nyob ntawm eBay, banggood, aliexpress thiab lwm qhov chaw online. Txawm li cas los xij, qhov tshwj xeeb tau teev tseg los ntawm ob peb ntawm cov neeg xa khoom no yog qhov tsis sib xws, yog li ntawd, kuv tau suav nrog cov ntawv txhais "Cov Parameters" txhais los ntawm Mingdong Technology.

Txuas lub sensor mus rau HX711 Load Cell thiab Siab sensor 24 ntsis AD module xav tau cov hauv qab no: txuas Pins 3 & 4 ua ke; Pin 1 (+IN) rau E+; Pin 3 & 4 (-IN) rau E-; Pin 2 (+ OUT) rau A+ thiab Pin 5 (-OUT) rau A- ntawm HX711 tus qauv. Ua ntej yuav ntim cov xaim hluav taws xob tso rau hauv lub tshuab tooj dag, npog cov hlau lead thiab cov npoo nthuav tawm ntawm lub ntsuas cua nrog lub raj cua sov lossis cov kab xev hluav taws xob. Ntxig thiab nruab nrab lub ntsuas hluav taws xob hla lub txiv mis qhib, thiab tom qab ntawd siv cov kua nplaum ntshiab kom kaw lub qhov muag sab hauv lub khoos phis tawj thaum saib xyuas kom tsis txhob khawb ntawm lub ntsej muag lub ntsej muag. Lub Qhov Ncauj Hlau Lub Taub Hau Lub Taub Hau Plug uas tau ua haujlwm nrog lub qhov loj txaus kom haum rau lub xaim hluav taws xob xaim yog xaim hla xaim, puv nrog silicone caulking thiab ntswj mus rau lub laj kab thaiv. So so caulking ntau dhau los ntawm lub rooj sib txoos, thiab tos 24 teev rau qhov caulking kom qhuav ua ntej kuaj.

Kauj ruam 4: Electronics

Electronics
Electronics
Electronics
Electronics
Electronics
Electronics

Cov khoom siv hluav taws xob suav nrog Raspberry Pi Zero (RPi) txuas nrog HX711 tus qauv nrog MD-PS002 lub ntsuas siab, KY-040 Rotary Encoder, Relay Module thiab LCD zaub. Rotary Encoder cuam tshuam nrog RPi ntawm Pin 21 mus rau DT ntawm tus encoder, Pin 16 rau CLK thiab Pin 20 rau SW lossis hloov ntawm tus lej nkag. Lub siab ntsuas tau txuas nrog HX711 tus qauv, thiab DT thiab SCK pins ntawm cov qauv no txuas ncaj qha rau Pin 5 thiab 6 ntawm RPi. Cov Relay Module tau tshwm sim los ntawm 2N2222A transistor Circuit uas txuas nrog RPi Pin 32 rau lub hauv paus ntsiab lus. Feem ntau Qhib cov neeg ntawm Relay Module tau txuas nrog LINE-SW thiab ib sab ntawm cov kauj ntawm 30A RELAY. Lub Hwj Huam thiab Hauv Paus rau Digital Vacuum Regulator tau muab los ntawm Pins 1, 4, 6 thiab 9 ntawm RPi. Tus pin 4 yog tus pin 5v fais fab, uas txuas ncaj qha rau RPi lub hwj chim nkag. Cov ntsiab lus ntawm kev sib txuas tuaj yeem pom hauv Digital Vacuum Regulator schematic.

Kauj Ruam 5: Hloov kho thiab teeb tsa Raspberry Pi

Hloov kho thiab teeb tsa Raspberry Pi
Hloov kho thiab teeb tsa Raspberry Pi

Hloov kho cov software uas twb muaj lawm ntawm koj li Raspberry Pi (RPi) nrog cov lus qhia kab hauv qab no

sudo apt-tau hloov tshiabudo apt-tau hloov tshiab

Nyob ntawm seb hnub dhau los koj li RPi nyob rau lub sijhawm twg yuav txiav txim siab lub sijhawm xav tau los ua kom tiav cov lus txib no. Tom ntej no, RPi yuav tsum tau teeb tsa rau I2C kev sib txuas lus ntawm Raspi-Config.

sudo raspi-teeb tsa

Qhov screen pom saum toj no yuav tshwm sim. Ua ntej xaiv Advanced Options thiab tom qab ntawd nthuav cov ntaub ntawv System thiab xaiv Yog. Tom qab rov qab mus rau Cov Ntawv Qhia Tseem Ceeb ntawm Raspi-Config xaiv Enable Boot rau Desktop/Kos thiab xaiv Boot rau Console. Los ntawm Cov Ntawv Qhia Tseem Ceeb xaiv Advanced Options, thiab pab kom I2C thiab SSH los ntawm cov kev xaiv muaj. Thaum kawg, xaiv Ua tiav thiab rov pib dua RPi.

Txhim kho I2C thiab cov lej software pob rau nab nab

sudo apt-tau nruab python-smbus python3-smbus python-dev python3-dev python-numpy

Kauj ruam 6: Software

Nkag mus rau hauv RPi thiab tsim cov npe hauv qab no. Tus /Vac_Sensor muaj cov ntaub ntawv program thiab /cav yuav muaj cov ntaub ntawv crontab.

cd ~ mkdir Vac_Sensor mkdir cav cd Vac_Sensor

Luam cov ntaub ntawv saum toj no mus rau /Vac_Sensor nplaub tshev. Kuv siv WinSCP txuas thiab tswj cov ntaub ntawv ntawm RPi. Kev txuas mus rau RPi tej zaum ua tiav ntawm Wifi lossis txuas txuas, tab sis SSH xav tau qhib rau hauv raspi-teeb tsa kom tso cai rau hom kev sib txuas no.

Thawj qhov haujlwm yog vac_sensor.py thiab tuaj yeem khiav los ntawm kev hais kom ua sai. Txhawm rau kuaj cov ntawv sau hauv qab no:

sudo python vac_sensor.py

Raws li tau hais dhau los, tsab ntawv vac_sensor.py yog thawj cov ntaub ntawv rau qhov ntsuas. Nws xa cov ntaub ntawv hx711.py los nyeem lub tshuab nqus tsev ntawm HX711 module. Qhov version ntawm hx711.py siv rau kuv qhov project los ntawm tatobari/hx711py. Kuv pom cov version no muab cov yam ntxwv kuv xav tau.

Lub LCD xav tau RPi_I2C_driver.py los ntawm Denis Pleic thiab rab rawg los ntawm Marty Tremblay, thiab tuaj yeem pom ntawm MartyTremblay/RPi_I2C_driver.py.

Rotary Encoder los ntawm Peter Flocker tuaj yeem pom ntawm

pimenu los ntawm Alan Aufderheide tuaj yeem pom ntawm

Cov ntaub ntawv config.json muaj cov ntaub ntawv khaws tseg los ntawm txoj haujlwm, thiab qee yam khoom tuaj yeem hloov kho los ntawm cov ntawv qhia zaub mov xaiv. Cov ntaub ntawv no tau hloov kho tshiab thiab khaws tseg ntawm Shutdown. Cov "units" tuaj yeem teeb tsa los ntawm Kev Xaiv cov ntawv qhia zaub mov xws li hauv-Hg (default), mm-Hg lossis psi. "Vacuum_set" yog kev txiav tawm siab, thiab khaws cia raws li hauv-Hg tus nqi, thiab tau hloov kho los ntawm Cutoff Pressure menu xaiv. Tus nqi "calibration_factor" tau teeb tsa tus kheej hauv cov ntawv config.json, thiab txiav txim siab los ntawm kev ntsuas ntsuas lub tshuab nqus tsev rau lub tshuab nqus tsev. Qhov "offset" yog tus nqi tsim los ntawm Tare, thiab tuaj yeem teeb tsa los ntawm cov ntawv qhia zaub mov xaiv no. Qhov "cutoff_range" tau teeb tsa tus kheej hauv cov ntawv config.json, thiab yog qhov sib txawv ntawm qhov sib txawv ntawm "lub tshuab nqus tsev" tus nqi.

Kev txiav tawm tus nqi = "lub tshuab nqus tsev nqus tsev" ± (("kev txiav tawm" /100) x "lub tshuab nqus tsev nqus tsev")

Thov nco ntsoov koj "calibration_factor" thiab "offset" yuav txawv ntawm qhov kuv muaj. Piv txwv config.json cov ntaub ntawv:

Kauj ruam 7: Calibration

Calibration
Calibration

Kev ntsuas ntsuas yog yooj yim dua los ua siv SSH thiab khiav cov lus txib hauv qab no:

cd Vac_Sensor sudo nab hab sej vac_sensor.py

Tawm ntawm tsab ntawv nab nab tuaj yeem ua tiav ntawm Ctrl-C, thiab kev hloov kho tuaj yeem ua rau /Vac_Sensor/config.json cov ntawv.

Kev ntsuas ntsuas lub tshuab nqus tsev yuav tsum muaj lub tshuab nqus tsev raug, thiab kho qhov "ntsuas ntsuas qhov ntsuas" kom haum rau cov zis tso tawm ntawm LCD. Ua ntej, siv Tare cov ntawv qhia zaub mov xaiv los teeb tsa thiab txuag qhov "offset" tus nqi nrog lub twj tso kua mis ntawm huab cua siab. Tom ntej no, tig lub twj tso kua mis nrog lub tshuab nqus tsev tshuab raj thiab tom qab lub siab hais daws teeb tsa nyeem lub LCD thiab sib piv qhov no rau lub tshuab nqus tsev. Tua lub twj tso kua mis tawm thiab tawm tsab ntawv. Kho qhov "calibration_factor" sib txawv nyob hauv /Vac_Sensor/config.json cov ntaub ntawv. Rov pib dua tsab ntawv thiab rov ua cov txheej txheem tshwj tsis yog Tare. Ua qhov kev hloov kho tsim nyog rau "calibration_factor" kom txog rau thaum cov zaub LCD sib phim rau kev ntsuas ntsuas.

"Calibration_factor" thiab "offset" cuam tshuam rau cov zaub ntawm cov lej hauv qab no:

get_value = read_average - "offset"

siab = get_value/ "calibration_factor"

Kuv siv lub Peerless Engine Vacuum Gauge qub los ntsuas tus tswj hwm tsis siv lub tshuab nqus tsev ntawm kuv lub twj tso kua mis vim tias nws tau raug tsoo tawm qhov ntsuas. Peerless gauge yog 3-3/4 (9.5 cm) txoj kab uas hla thiab nyeem tau yooj yim dua.

Kauj Ruam 8: Cov Ntawv Qhia Tseem Ceeb

Ntawv qhia zaub mov tseem ceeb
Ntawv qhia zaub mov tseem ceeb
Ntawv qhia zaub mov tseem ceeb
Ntawv qhia zaub mov tseem ceeb
  • Lub Tshuab Nqus Tsev - Qhib lub twj tso kua mis
  • Txiav Tawm Siab - Teeb qhov txiav tawm siab
  • Tare - Qhov no yuav tsum tau ua nrog TSIS muaj lub tshuab nqus tsev ntawm lub twj tso kua mis thiab ntawm qhov ntsuas cua.
  • Chav Nyob-Xaiv cov koog uas yuav siv (piv txwv li hauv-Hg, mm-Hg thiab psi)
  • Reboot - Reboot Raspberry Pi
  • Kaw - Kaw Raspberry Pi ua ntej yuav tua lub hwj chim tseem ceeb.

Kauj Ruam 9: Nqus tsev

Nqus tsev
Nqus tsev

Nias lub tshuab nqus tsev xaiv xaiv yuav tig rau lub twj tso kua mis, thiab tso saib lub vijtsam saum toj no. Lub vijtsam no qhia txog Chav Nyob thiab [Txiav Tawm Siab] teeb tsa ntawm tus tswj hwm, nrog rau lub zog tam sim no ntawm lub twj tso kua mis. Nias lub pob qhov rooj kom tawm lub tshuab nqus tsev tshuab raj.

Kauj Ruam 10: Txiav Tawm Siab

Txiav Siab
Txiav Siab

Cutoff Pressure menu tso cai rau koj xaiv lub siab xav tau rau kev txiav tawm. Tig lub pob qhov rooj yuav hloov qhov kev tso tawm kom pom thaum lub siab xav tau mus txog nias lub pob qhov rooj kom Txuag thiab Tawm ntawm cov ntawv qhia zaub mov.

Kauj ruam 11: Tare

Tare
Tare

Tare cov ntawv qhia zaub mov yuav tsum ua tiav nrog TSIS muaj lub tshuab nqus tsev ntawm lub twj tso kua mis thiab ntsuas ntsuas huab cua lossis xoom siab.

Kauj Ruam 12: Chav Nyob

Chav nyob
Chav nyob

Cov Chav Ntawv qhia zaub mov yuav tso cai rau xaiv cov chav ua haujlwm thiab tso saib. Chav nyob tsis yog-Hg, tab sis mm-Hg thiab psi kuj tseem tuaj yeem xaiv. Chav nyob tam sim no yuav qhia nrog lub hnub qub. Txhawm rau xaiv chav nyob, txav tus cursor mus rau chav uas xav tau thiab thawb lub pob qhov rooj. Thaum kawg, txav tus cursor rau Rov Qab thiab nias lub pob qhov rooj kom tawm thiab Txuag.

Kauj ruam 13: Reboot lossis Kaw

Reboot los yog Kaw
Reboot los yog Kaw

Raws li lub npe cuam tshuam, xaiv ib qho ntawm cov ntawv qhia zaub mov no yuav ua rau Reboot lossis Shutdown. Nws tau pom zoo tias Raspberry Pi yuav raug kaw ua ntej lub hwj chim raug kaw. Qhov no yuav Txuag txhua qhov ntsuas tsis tau hloov pauv thaum ua haujlwm, thiab txo qhov ua rau muaj kev puas tsuaj rau SD Card.

Kauj ruam 14: Khiav ntawm Startup

Khiav ntawm Startup
Khiav ntawm Startup

Muaj qhov qhia tau zoo heev Raspberry Pi: Tshaj tawm Python tsab ntawv ntawm kev pib rau khiav cov ntawv sau thaum pib.

Nkag mus rau hauv RPi thiab hloov mus rau /Vac_Sensor phau ntawv teev npe.

cd /Vac_Sensornano launcher.sh

Suav nrog cov ntawv hauv qab no hauv launcher.sh

# !.

Tawm thiab txuag lub launcher.sh

Peb yuav tsum ua kom tsab ntawv ua tiav.

chmod 755 launcher.sh

Xeem tsab ntawv.

sh launcher.sh

Tom ntej no, peb yuav tsum hloov kho crontab (tus thawj tswj haujlwm ua haujlwm linux) kom qhib tsab ntawv thaum pib. Nco tseg: peb twb tau tsim cov npe /cav yav dhau los.

sudo crontab -e

Qhov no yuav coj lub qhov rai crontab zoo li pom saum toj no. Nkag mus rau qhov kawg ntawm cov ntawv thiab nkag mus rau kab hauv qab no.

@reboot sh /home/pi/Vac_Sensor/launcher.sh>/tsev/pi/cav/cronlog 2> & 1

Tawm thiab khaws cov ntaub ntawv, thiab rov pib dua RPi. Tsab ntawv yuav tsum pib tsab ntawv vac_sensor.py tom qab RPi rov pib dua. Cov xwm txheej ntawm tsab ntawv tuaj yeem tshawb xyuas hauv cov ntaub ntawv cav nyob hauv /cav cav.

Kauj Ruam 15: 3D Luam Qhov Chaw

3D Luam Tshooj
3D Luam Tshooj
3D Luam Tshooj
3D Luam Tshooj
3D Luam Tshooj
3D Luam Tshooj

Cov no yog cov khoom kuv tsim hauv Fusion 360 thiab luam tawm rau Case, Pob Qhov Rooj, Capacitor Npog thiab Ntsia Hlau Ntsawb.

Kuv siv ib tus qauv rau 1/4 NPT Txiv Ntseej los ntawm Thingiverse los txuas rau Lub Tshuab Nqus Sensor los ua ke rau Cov Ntaub Ntawv. Cov ntaub ntawv tsim los ntawm ostariya tuaj yeem pom ntawm NPT 1/4 Xov.

Pom zoo: