Pressure measurement circuit schematic
There are many ways to measure pressure. Here is a method for measuring pressure using strain gauges. If the tensile force or pressure is applied to the resistor body, the change in resistance value is proportional to the expansion and contraction of the resistor body. The output of the strain gauge is generally extremely small and temperature-dependent, so that the temperature compensation component is used in the bridge of the strain gauge. An example of a pressure measuring circuit is shown in the figure. The strain gauge uses a full-bridge sheet strain gauge with a nominal resistance of 120 Ω, and the amplifier uses an instrument amplifier. Industrial plugs, sockets and couplers are mainly divided into four categories: plugs, sockets, connectors and appliance input sockets, which are generally collectively referred to as industrial plugs. Its main features are as follows: IP44 Plug,IP67 Plug,IP67 Socket,IP44 Socket Ningbo Bond Industrial Electric Co., Ltd. , https://www.bondelectro.com
The instrumentation amplifier is a kind of differential amplifier with high input impedance and strong suppression of the same direction noise. It is most suitable for amplifying the bridge output signal.
1. Safe and reliable
â‘ This kind of product uses the color of the shell to indicate the rated voltage, such as: 40V-45V is purple, 110V-130V is yellow, 200V-250V is blue, 230V-415V is red, and 500V is black. It is easy to distinguish, and you can't get it wrong.
â‘¡Different specifications have different diameters, pole numbers, and grounding contact positions. Only the same specifications can be plugged in to prevent misplugging.
â‘¢There is protection against electric shock. The grounding pole insert sleeve in the socket is longer than the phase pole and neutral pole insert sleeve, so as to ensure that the grounding pole is connected before the phase pole is connected when the plug is inserted, and the grounding pole is finally separated when the plug is pulled out. It is very safe to use.
â‘£Holding devices are provided to clamp the plugs and sockets to prevent them from falling off after being inserted, which improves the reliability.
⑤High protection level. There are IP44 splash-proof type, IP67 anti-immersion type and so on. Not only the human body cannot touch the live parts, but it can also be used under different environmental conditions to ensure safety.
â‘¥An elastic band is added to the insert sleeve. Ensure close contact, good conductivity and long service life after the plug is inserted.
⑦There is a cable clamping device, which can clamp the cable sheath, so that it will not be pulled off, and it is safe to use.
2. Durable
â‘ Good mechanical properties. The product shell is made of high-quality engineering plastic, which has high strength, impact resistance and is not afraid of falling. The rubber and plastic used have anti-aging properties and can be used not only indoors but also outdoors, and are durable.
②Heat resistance and flame resistance. The shell and internal insulating parts have heat resistance, the temperature can reach (100±5)℃, and the important parts can withstand (125±5)℃; and it is flame retardant.
â‘¢More resistant to plug and use. For example, for a product with a rated current of 16A, the number of normal plug-in operation cycles is more than 5000 times.
â‘£The temperature rise test of conductive contact parts shall not exceed 50K, which is suitable for long-term use.
3. Strong versatility
The products adopt the standards of GB/T 11918~11919-2001, which are equivalent to IEC 60309-1 and 2 standards, and are fully in line with international standards. Therefore, such products can be used both domestically and internationally. At the same time, it has a wide variety of specifications, which can meet various occasions and uses.
These characteristics of industrial plugs and sockets give it high safety, reliability and international versatility. Therefore, it has gradually received attention in the country. Through continuous promotion and application, industrial plugs and sockets have gradually entered various industries, such as electricity, ports, machinery industries and large-scale buildings. With the development of science and technology, industrial plugs and sockets are constantly innovating. Various quick installation technologies have been gradually applied to plugs and sockets, making it more convenient to use.