Home improvement supervisors reminded: As the country does not currently have a uniform home furnishing quotation standard, some home improvement markets will only list guidance prices for consumers' reference. In order to make life easier, designers of small companies often report their budgets low to attract consumers to sign contracts. You should pay attention to the following questions when signing a contract.
1. Large numbers of tabloids. Intentionally reporting a large number of items to a small number will in turn push down the total price.
2. The newspaper does not report. In the budget, some fixed items must be deliberately omitted, such as circuit reconstruction, heating and dismantling, lighting installation and other projects are often not reported when the budget, but as an addition.
3. Intentional indiscretion. Utilizing consumers’ knowledge of the profession, they intentionally wrote down some of the eliminated processes or practices into the budget. For example, if the width of the door covers changes midway, putty does not use water-resistant putties according to the agreement, it requires the addition of wall linings.
4. Do not specify details. The decoration process is more complex, and the technology used is related to the main material. After the main material is clear, the process is difficult to modify. Some designers have blurred the main material in the quotation, and the actual construction of consumers, such as the proposed selection of main material brands, the budget naturally increases.
5. Process modification. After agreeing on the price of the craft in the contract, the decoration staff used the premise that the original craftsmanship was not suitable for the quality requirements of the consumer as an excuse to induce consumers to change the original craft.
Decoration budget knowledge entrance decoration restaurant decoration home decoration design door price heating
The vibration sensor(Vibration Transmitter) is one of the key components in the testing technology of Vibration Measurement. Its main function is to receive the mechanical quantity and convert it into a proportional electric quantity. Because it is also an electromechanical conversion device. So we sometimes call it a transducer, a vibration pickup, etc.
Commonly used vibration sensors are as follows:
1. Piezoelectric resonant
The piezoelectric sheet is used to receive the vibration signal, and the resonance frequency of the piezoelectric sheet is relatively high. In order to reduce the resonance frequency, it is realized by increasing the mass of the piezoelectric sheet vibrating body, and using a spring ball instead of an appendage to reduce the two resonance frequencies and enhance the vibration effect. Its advantages are high sensitivity and simple structure. However, the signal needs to be amplified and sent to a TTL circuit or a single-chip microcomputer circuit, but it is enough to use a triode single-stage amplification
2. mechanical vibration
In the traditional vibration detection method, after being vibrated, the spring ball vibrates at a reduced amplitude for a long time, and this vibration is easy to be detected by the detection circuit. The vibration output switch signal is determined by the output impedance and the resistance value of the matching output. According to the input impedance of the detection circuit, it can be made into a high-impedance output mode.
3. Micro Vibration Sensor
The mechanical vibration sensor is miniaturized, the vibration body is carbonized and sealed, and its working performance is more reliable. The output switching signal is directly connected with the TTL circuit and or the input circuit of the single-chip microcomputer, and the circuit structure is simple. The output impedance is high, and the quiescent working current is small.
Advantages of Vibration Sensors
1. Small size and light weight. It can be applied to some vibration test systems that are greatly affected by the additional mass.
2. It has a wider response frequency range of 4Hz-2000Hz than the magnetoelectric speed sensor, and the mechanical moving parts are not easy to damage
If you have any questions about the vibration sensor, please contact us, we will provide you with professional and timely answers.
Vibration Sensor,Accelerometer Sensor,Velocity Sensor,Accelerometer Vibration Sensor
Wuxi Winsun Automation Instrument Co., Ltd , https://www.jswxwinsun.com