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Method for detecting whether a stove on electromagnetic oven

A technology of induction cooker and stove, which is applied in the field of radio frequency, can solve the problems affecting the antenna matching circuit, detuning, and the influence of induction cooker control, etc., and achieve the effect of low failure rate, ingenious conception, and convenient mass production

Inactive Publication Date: 2011-07-13
上海酒店设备工程成套南翔厂有限公司
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Problems solved by technology

[0002] At present, in some products, the temperature control unit is directly connected to the antenna coil, and the detection of the radio frequency field is controlled by controlling the on-off of the antenna coil. Therefore, the matching parameters of the antenna are not only related to the characteristics of the antenna itself, but also to the type of temperature control unit selected. Related, at the same time, the lead wires and distribution parameters of the temperature control unit also affect the antenna matching circuit, which is easy to cause detuning during work, which affects the control of the induction cooker

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  • Method for detecting whether a stove on electromagnetic oven
  • Method for detecting whether a stove on electromagnetic oven

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Embodiment Construction

[0009] see figure 1 , The RF field generating device is composed of a power supply, a high-frequency oscillation unit, a high-frequency power amplification unit, a detection amplification unit, an A / D detection unit, an MCU control unit, and a relay output unit. When the power is applied, the high-frequency oscillation unit generates a non-modulated equal-amplitude signal, which drives the directly coupled antenna matching circuit after power amplification, and generates an electromagnetic field with a certain field strength around the antenna.

[0010] see figure 2 , the receiving sensing device consists of an antenna matching unit, a rectifying unit, a frequency dividing unit, a comparison unit with a hysteresis characteristic, and a temperature sensing unit (which may be a temperature switch or a thermistor, or a combination of the two). When the receiving induction device is close to the radio frequency field generating device, an induced voltage is generated on the ante...

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Abstract

The invention discloses a method for detecting whether a stove on an electromagnetic oven, mainly comprising the following steps: a power supply, a high-frequency oscillating unit, a high-frequency power amplifying unit, a detection amplifying unit, an A / D (analog / digital) detecting unit, an MCU (micro control unit) and a relay output unit form a radio-frequency field generating device; and an antenna matching unit, a rectifying unit, a frequency dividing unit, a comparison unit with a hysteresis characteristic and a temperature sensing unit form a receiving induction device. The method is smart in conception and has the following advantages that: 1) the temperature unit does not influence parameters of the radio-frequency circuit, so that the batch production is convenient; 2) the device is not provided with any storage and operation unit, so that the fault rate is low, and compared with the unit using RFID (radio-frequency identification) control, the work such as initialization and calibration and the like is not required; and 3) the receiving device is not provided with a conversion device with a complex protocol, so that the reliability of the whole system is improved and the promotion value is great.

Description

technical field [0001] The invention relates to the field of radio frequency technology, in particular to a method for detecting whether a stove is placed on an electromagnetic cooker and heating the put stove to a required temperature. Background technique [0002] At present, in some products, the temperature control unit is directly connected to the antenna coil, and the detection of the radio frequency field is controlled by controlling the on-off of the antenna coil. Therefore, the matching parameters of the antenna are not only related to the characteristics of the antenna itself, but also to the type of temperature control unit selected. Related, at the same time, the lead wires and distribution parameters of the temperature control unit also affect the antenna matching circuit, which is easy to cause detuning during operation, which affects the control of the induction cooker. Contents of the invention [0003] The purpose of the present invention is to provide a m...

Claims

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Application Information

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IPC IPC(8): H05B6/06H05B6/12
Inventor 郑修南
Owner 上海酒店设备工程成套南翔厂有限公司
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