44results about How to "Achieve frequency hopping" patented technology

The invention relates to the technical field of air conditioners, in particular to a control method of an air conditioner. Through the control method, the problems of poor universality and poor user experience existing in an existing air conditioner control method can be solved. The control method comprises the steps that rotation speed of an inner fan is obtained; according to a fitting formula,frequency raising speed of a compressor in the frequency raising stage is calculated; and the compressor is controlled to raise frequency according to the frequency raising speed, wherein the fittingformula is determined according to the corresponding relation between the rotation speed of the inner fan and the frequency raising speed of the compressor. The fitting formula is determined in advance, then the frequency raising speed of the compressor in the frequency raising stage is calculated according to the fitting formula, and then the compressor is controlled to raise the frequency according to the frequency raising speed. Through the control method of the air conditioner, the universality of the air conditioner and use experience of a user can be improved.

The invention relates to the technical field of air conditioners, in particular to a control method for an air conditioner in a heating mode, and aims at solving the problems that an existing air conditioner control method is poor in universality and bad in user experience. For the purpose, the control method comprises the steps that outdoor environment temperature is acquired; the valve closing speed of an expansion valve is calculated according to a first fitting formula; the accelerated speed of an outer fan is calculated according to a second fitting formula; the frequency increasing speedof a compressor in the frequency increasing stage is calculated according to a third fitting formula; the expansion valve is controlled to be closed to the target opening degree according to the valve closing speed; the rotation speed of the outer fan is controlled to be increased to the target rotation speed according to the accelerated speed; and preferably, when the expansion valve is closed to the target opening degree and the rotation speed of the outer fan is increased to the target rotation speed, the frequency of the compressor is controlled to be increased according to the frequencyincreasing speed. Through the control method, the control method for the air conditioner in the heating mode has the advantages that the universality of the air conditioner can be improved, and the using experience of users is improved.

The invention relates to the technical field of air conditioners, in particular to an air conditioner control method in a cooling mode. The air conditioner control method in the cooling mode aims to solve the problems of poor universality and poor user experience of an existing air conditioner control method. The air conditioner control method includes the steps that an outdoor ambient temperatureis obtained; a frequency ascending speed of a compressor in a frequency ascending stage is calculated according to a fitting formula; the compressor is controlled to perform frequency ascending according to the frequency ascending speed; and the fitting formula is determined according to the corresponding relation between the outdoor ambient temperature and the frequency ascending speed of the compressor. The fitting formula is predetermined, then the frequency ascending speed of the compressor in the frequency ascending stage is calculated according to the fitting formula, and then the compressor is controlled to perform frequency ascending according to the frequency ascending speed; and the air conditioner control method in the cooling mode can improve the universality of the air conditioner and improve the use experience of a user.

The invention discloses an index modulation frequency hopping communication technology based on an IFFT / FFT framework and belongs to the technical field of wireless communication. By introducing the index modulation technology into the frequency hopping communication technology based on IFFT / FFT, index selection is carried out on parts of sub-carriers to carry out activation to transmit modulationsignals from all sub-carriers of an IFFT / FFT module in an information driving way and other sub-carriers are kept in a silent state. Index modulation is introduced into an emission end of a system, and information bits are divided into two parts. One part is used as signal modulation bit and is mapped to be a constellation point symbol of M system. One part is used as index information bit. Partsof sub-carriers are selected to be excited to transmit the constellation symbol in the all sub-carriers, so frequency hopping is achieved in a way of information driving, so frequency spectrum frequency is obviously increased and system transmission efficiency is improved. According to the invention, frequency hopping is achieved in a way of information driving, so compared with the FI, the provided SFI has quite high frequency spectrum frequency and better system performance.

The invention relates to the technical field of air conditioners, in particular to a control method for an air conditioner. The control method for the air conditioner aims at solving the problems of low universality and poor user experience in an existing control method for the air conditioner. For the purpose, the control method comprises the following steps: calculating the temperature difference between an indoor environment temperature and a set temperature; calculating the acceleration of an outer fan according to a first fitting formula; calculating the frequency-increasing speed of a compressor in a frequency-increasing stage according to a second fitting formula; controlling the outer fan to accelerate to reach a target rotational speed according to the acceleration; and preferably, controlling the compressor to carry out frequency increasing according to the frequency-increasing speed while the outer fan accelerates to reach the target rotational speed according to the acceleration. Through the control manner, the control method for the air conditioner is capable of improving the universality of the air conditioner and improving the use experience of a user.

The invention relates to a frequency selection device based on the WIA-PA protocols. The frequency selection device comprises a double-path phased-locked loop unit, an MCU and an RF narrowband filtering and amplification unit in sequential connection, the double-path phased-locked loop unit is connected with the RF narrowband filtering and amplification unit, and the RF narrowband filtering and amplification unit is also connected with an antenna and a modem. The frequency selection method comprises that when the MCU receives a switching command from a host computer, and the double-path phased-locked loop unit is configured to output first local oscillation and second local oscillation; after the model emits a reception trigger signal, first and second RF switches are switched to a reception link, and the reception link is powered on; and the RF narrowband filtering and amplification unit carries out low-noise amplification on a received RF signal, primary frequency mixing is carried out on the RF signal to generate an intermediate-frequency signal, the intermediate-frequency signal is filtered and amplified, secondary frequency mixing is carried out on the filtered and amplified intermediate-frequency signal so that the intermediate-frequency signal is recovered to an RF signal, and the recovered RF signal is amplified and then output by the switch RF switch. Interference of WLAN signals can be effectively filtered by increasing intermediate-frequency filtering in the reception link, the device reception sensitivity is improved, and the transmission distance is increased.

The invention relates to one digital integral communication method with control signal channel jump frequency function, which comprises integral group mode and direct mode, wherein, the former is to store information base devices divided into single base station module and multi-base module; the latter one is to store information basic device with mobile bench work mode; the jump frequency comprises control signal jump frequency and business signal jump frequency by use of TDMA system, wherein, the Nts hour gap to form one frame hollow one to form one frame.

The invention relates to the technical field of air conditioners, in particular to a method for controlling the start-up of an air conditioner. The present invention aims to solve the problems of poor universality and poor user experience existing in the existing air conditioner start-up control method. For this purpose, the start-up control method of the present invention includes: obtaining the rotational speed of the internal fan; calculating the closing speed of the expansion valve according to the first fitting formula; calculating the acceleration of the external fan according to the second fitting formula; Combine the formula to calculate the frequency increase speed of the compressor in the frequency increase stage; control the expansion valve to close the valve at the valve closing speed to the target opening degree; control the external fan to increase the speed to the target speed according to the acceleration; preferably, close the expansion valve to the target speed When the opening degree is set and the speed of the outdoor fan reaches the target speed, the compressor is controlled to increase frequency according to the frequency increase speed. Through the above control method, the start-up control method of the air conditioner of the present invention can improve the universality of the air conditioner and improve the user experience.