CN102123531A - Method for detecting whether a stove on electromagnetic oven - Google Patents
Method for detecting whether a stove on electromagnetic oven Download PDFInfo
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- CN102123531A CN102123531A CN2010100226033A CN201010022603A CN102123531A CN 102123531 A CN102123531 A CN 102123531A CN 2010100226033 A CN2010100226033 A CN 2010100226033A CN 201010022603 A CN201010022603 A CN 201010022603A CN 102123531 A CN102123531 A CN 102123531A
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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
The present invention relates to the radio-frequency technique field, specifically, relate to a kind ofly being used to survey whether be placed with stove and accessory on the electromagnetic oven, the stove and accessory of putting into is heated to needed method of temperature.
Background technology
Some product directly seals in temperature control unit in the aerial coil at present, control the detection of radiofrequency field by the break-make of control antenna coil, therefore outside the Pass the match parameter of antenna not only has with the characteristic of antenna itself, also relevant with selected temperature control unit kind, the lead-in wire of simultaneous temperature control unit and distributed constant also influence antenna-matching circuit simultaneously, cause off resonance in the time of work easily, impact for the control of electromagnetic oven.
Summary of the invention
The objective of the invention is to, provide a kind of and can effectively overcome above-mentioned defective, utilize the radiofrequency field generation device to produce frequency electromagnetic waves and be used for driving the reception induction installation, after the reception induction installation is energized, according to electromagnetic induction principle, can the electromagnetic wave of radiofrequency field generation device be exerted an influence conversely, can determine by detecting this influence whether receiving system is present in the method that the electromagnetic oven stove and accessory in this radiofrequency field is surveyed.
For achieving the above object, the present invention adopts following technical scheme: the method that a kind of electromagnetic oven stove and accessory is surveyed, mainly comprise following steps: by power supply, high frequency oscillation unit, the high frequency power amplifying unit, detection amplifying unit, A/D detecting unit, the MCU control unit, the relay output unit is formed the radiofrequency field generation device; By the antenna match unit, rectification unit, frequency unit has the hysteretic characteristic comparing unit, and temperature sensing unit is formed the reception induction installation, receiving circuit on the radiofrequency field generation device, detect the change in voltage on the transmitting antenna, after amplifying through detection, send into waveform shaping circuit, wherein one the tunnel deliver in the A/D conversion equipment, other one the tunnel is sent in the waveform detection circuit.CPU in the radiofrequency field generation device is according to the result of waveforms detection and AD conversion, judges to receive induction installation whether in radiofrequency field.
Because adopt such scheme, be not difficult to draw as drawing a conclusion: the present invention is skillfully constructed, and has the following advantages 1) temperature unit can not influence the parameter of radio circuit, is convenient to produce in batches.This directly seals in temperature control unit in the aerial coil for present some product, control the detection of radiofrequency field by the break-make of control antenna coil, therefore outside the Pass the match parameter of antenna not only has with the characteristic of antenna itself, also relevant with selected temperature control unit kind, the lead-in wire of simultaneous temperature control unit and distributed constant also influence antenna-matching circuit simultaneously, cause off resonance in the time of work easily, impact for the control of electromagnetic oven.And this covering device, control method adopts logic control, except the control switch that can use fixed temperature as the temperature detection, can also use the thermistor detected temperatures, by the hysteretic characteristic curve is set, can select the size of the temperature difference, therefore use and have characteristics very easily.2) this device is without any storage and arithmetic element, so failure rate is low, and the unit compared with using RFID control need not work such as initialization and calibration.3) receiving system does not have the conversion equipment of complex protocol, thereby the reliability that improves whole system has promotional value.
Description of drawings
Below in conjunction with drawings and Examples the present invention is described in further detail.
Fig. 1 is a radiofrequency field generation device block diagram of the present invention;
Fig. 2 is that the present invention accepts the induction installation block diagram.
Embodiment
Referring to Fig. 1, the radiofrequency field generation device is by power supply, high frequency oscillation unit, and the high frequency power amplifying unit, the detection amplifying unit, the A/D detecting unit, the MCU control unit, the relay output unit is formed.After applying power supply, high frequency oscillation unit produces unmodulated constant-amplitude signal, through the direct-coupled antenna-matching circuit of power amplification rear drive, produces the electromagnetic field of certain field intensity around antenna.
Referring to Fig. 2, receive induction installation by the antenna match unit, rectification unit, frequency unit has the hysteretic characteristic comparing unit, temperature sensing unit (can be temperature switch or thermistor, also can be both combinations).When receiving induction installation near the radiofrequency field generation device, receive on the induction installation antenna and produce induced voltage, after this voltage reaches certain numerical value, the frequency unit and the temperature detecting unit that receive in the induction installation are started working, the comparing unit that has a hysteretic characteristic is provided with the output logic control signal according to the output of the temperature-sensing device that is connected and comparator parameter, close or open frequency divider, when frequency divider is opened, continuous frequency division modulation signal is arranged on the antenna, and frequency divider cuts out no any modulation signal on the aft antenna.
Receive the induction installation temperature detection part and used 3 kinds of control interfaces.First interface is the switching value input signal, directly uses bimetal leaf or the corresponding transducer that has the output of switch character, directly controls closing or opening of frequency divider, and this port is insensitive to the transducer output parameter.Second is the thermistor input interface, can select the thermistor of any temperature characterisitic for use, according to the temperature difference of being controlled corresponding resistance value is set and can realizes temperature controlling.Other one the tunnel is similar to the first via, is used for and temperature-sensitive combination results control signal, can carry out the control of complicated temperature signal.Can only use an interface in the practical application, also can be used in combination.
Receiving circuit on the radiofrequency field generation device detects the change in voltage on the transmitting antenna, after amplifying through detection, sends into waveform shaping circuit, wherein one the tunnel delivers in the A/D conversion equipment, and other one the tunnel is sent in the waveform detection circuit.CPU in the radiofrequency field generation device is according to the result of waveforms detection and AD conversion, judges to receive induction installation whether in radiofrequency field, if detect, then starts corresponding control programs.
Claims (1)
1. the method surveyed of an electromagnetic oven stove and accessory mainly comprises following steps: by power supply, and high frequency oscillation unit, the high frequency power amplifying unit, the detection amplifying unit, the A/D detecting unit, the MCU control unit, the relay output unit is formed the radiofrequency field generation device; By the antenna match unit, rectification unit, frequency unit, have the hysteretic characteristic comparing unit, temperature sensing unit is formed the reception induction installation, receiving circuit on the radiofrequency field generation device, detect the change in voltage on the transmitting antenna, after the detection amplification, send into waveform shaping circuit, wherein one the tunnel deliver in the A/D conversion equipment, other one the tunnel is sent in the waveform detection circuit, CPU in the radiofrequency field generation device is according to the result of waveforms detection and AD conversion, judges to receive induction installation whether in radiofrequency field.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010100226033A CN102123531A (en) | 2010-01-08 | 2010-01-08 | Method for detecting whether a stove on electromagnetic oven |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010100226033A CN102123531A (en) | 2010-01-08 | 2010-01-08 | Method for detecting whether a stove on electromagnetic oven |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102123531A true CN102123531A (en) | 2011-07-13 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010100226033A Pending CN102123531A (en) | 2010-01-08 | 2010-01-08 | Method for detecting whether a stove on electromagnetic oven |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102123531A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102435883A (en) * | 2011-09-29 | 2012-05-02 | 华磁科技（宁波）有限公司 | Detection method for induction cooker |
| CN107157309A (en) * | 2017-06-30 | 2017-09-15 | 浙江绍兴苏泊尔生活电器有限公司 | Electromagnetic oven cooker |
-
2010
- 2010-01-08 CN CN2010100226033A patent/CN102123531A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102435883A (en) * | 2011-09-29 | 2012-05-02 | 华磁科技（宁波）有限公司 | Detection method for induction cooker |
| CN102435883B (en) * | 2011-09-29 | 2014-02-26 | 华磁科技（宁波）有限公司 | Detection method for induction cooker |
| CN107157309A (en) * | 2017-06-30 | 2017-09-15 | 浙江绍兴苏泊尔生活电器有限公司 | Electromagnetic oven cooker |
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Application publication date: 20110713 |