Alarm System and Emergency Message from Wheelchair User Emergency Condition

When someone uses a wheelchair, there is still the possibility of an accident to the user, such as when the user suddenly falls down from the wheelchair or the user falls down along with the wheelchair. For notification of emergency conditions for wheelchair users, an alarm system is designed that can send messages to the intended mobile number. The system is designed using Wemos D1 mini, Ultrasonic, MPU-6050 and Proximity E18-D80NK sensors. The conclusion from the measurement and test results are: the value read by the MPU-6050 sensor is taken one axis for each direction when the wheelchair was falling down, Y≤180o for left falling down, X≤50o for right falling down, Z≤65o for forward falling and Z≥140o for backwards falling down. The Ultrasonic sensor works well for detecting the presence of user’s legs and the E18-D80NK proximity sensor works well for detecting the position of the user who is sitting in a wheelchair. Receiving notifications through the BLYNK server works well, not affected by distance provided there is an internet connection connected to the device.

Aplikasi Proximity Sensor Pada Mesin Rajut Datar Semi Otomatis Berbasis Komputer

Perkembangan teknologi semakin pesat dengan adanya alih teknologi 4.0 pada industri tekstil khususnya pada produksi kain rajut. Kain rajut diproduksi menggunakan mesin rajut salah satunya adalah mesin rajut datar semi otomatis. mesin rajut datar semi otomatis yang ada di politeknik sttt bandung, dapat memproduksi kain rajut dengan lebar 80 - 100 cm. Pada produksi kain rajut yang menggunakan mesin rajut datar, sering terjadi cacat bolong yang disebabkan oleh benang putus pada jarum rajut. Hal ini akan mengakibatkan produksi kain rajut menjadi tidak maksimal, karena mesin sering berhenti tiap kali benang putus. Oleh karena itu pada penelitian ini akan dilakukan perancangan dan pembuatan sensor cacat bolong pada kain rajut pada mesin rajut datar semi otomatis. Pendeteksi cacat bolong kain rajut menggunakan sensor LDR, kemudian variable nilai output sensor diolah menggunakan mikrokontroler, dari mikrokontroler menghasilkan trigger untuk menyalakan alarm, menghitung jumlah cacat, serta menghentikan mesin. Hasil dari penelitian ini diharapkan dapat meningkatkan kualitas atau mutu kain rajut, mengetahui efisiensi mesin serta dapat mengaplikasikan salah satu penerapan dari teknologi 4.0 dalam hal sistem kontrol otomatis berbasis komputer pada proses pembuatan kain rajut pada mesin rajut datar semi otomatis.

Falling Ball Viscometer using Inductive Proximity Sensor

Viscosity is the one of the major parameters to be considered in fluid related experiments and also in many industries. A new method of calculation of Dynamic Viscosity using the Viscometer which is easy for experimentation, with less calculation efforts, simple in design, construction with min. investment and no or minimum maintenance. This Paper intends to find the viscosity of Opaque fluids using falling ball viscometer. Falling Ball Viscometer works with Strokes law as the correction factor is multiplied in the calculation. As the correction factor is derived from the outcomes from the experiment and C-Code was written to make the calculation more efficient.

Luxmeter Design with Proximity Sensor to Efficiently Test Light Intensity and Distance on Lamp Operation in Hospitals

The lighting of the operating/surgical site depends on the quality of the lighting from the overhead light source and the reflection from the curtain. Light measurement on the operating table is very necessary because it generates light that is irradiated into the cutting wound without dazzling the cutting surface so that pathological conditions can be recognized and must provide depth contrast and anatomical relationships, to ensure this proper calibration method is needed. Long-term use of medical devices can cause changes in accuracy. Therefore, the author makes a tool to measure the intensity of light which is equipped with a distance meter. The purpose of this study was to develop a measuring instrument for measuring the intensity of light in operating lamps, namely a luxmeter by making Luxmeter equipped with a TFT Display Distance Sensor. This tool uses an ultrasonic sensor HC-SR04 to measure the distance between the light source and the sensor module and the MAX44009 sensor to measure the light intensity of the operating lamp displayed on the TFT screen. Based on the module distance setting to the roll meter, the distance error value for the measurement of the Surabaya electromedical engineering workshop lamp at the 75 cm roll meter distance setting is 0.0127% for the 100 cm roll meter distance setting is 0.0045%. The error rate of the light intensity module on the results of the measurement of light intensity on the luxmeter by setting the roll meter distance of 75 cm between the tool and the lamp of the electromedical engineering workshop is getting an error value of 0.082% lux and for the light intensity on the results of the measurement of light intensity on the luxmeter with a roll meter distance setting of 100 cm between the tool and the lamp in the electromedical engineering workshop, that is, the error value of lux is 0.055%. The design of a luxmeter equipped with a proximity sensor can measure the intensity of light and the distance between the tool and the light source and can assist in the learning process with a more effective Luxmeter design that will assist electromedics in testing operating lamps in hospitals to be more efficient.

Prototype Mini Crane Pemindah Barang Berbasis Sistem Otomasi

Crane merupakan alat yang digunakan untuk mempermudah dalam memindahkan dan mengangkat suatu barang. Peneltian ini bertujuan untuk membuat sistem mini crane untuk optimalisasi pemindahan barang berbasis otomasi industri yang memanfaatkan PLC (programmable logic controller) sebagai kontroler dan pneumatik sebagai aktuatornya. Sistem ini menggunakan PLC Mitsubishi sebagai pengendali utama. PLC bekerja berdasarkan masukan yang diperoleh dari selector switch untuk memilih sistem kerja manual atau otomatis. Terdapat push button sebagai tombol start dan stop, limit switch sebagai pembatas gerak sumbu X dan Y dari Rodless Cylinder untuk memindahkan barang, proximity sensor untuk mendeteksi keberadaan dari barang yang akan dipindahkan dan yang telah dipindahkan. Pada hasil penelitian ini sensor yang digunakan untuk mendeteksi jenis material benda kerja menggunakan sensor proximity inductive. Dalam satu proses crane membutuhkan waktu maksimal 15,37 detik. Berat maksimal yang dapat dihisap vacuum pada tekanan 3 bar adalah 650g, pada tekanan 4 bar adalah 950g, dan pada tekanan 6 bar adalah 1059g.