CN106154340A - There is electronic installation and the object detection method of object detecting function - Google Patents

Abstract

A kind of electronic installation with object detecting function and object detection method, wherein object detection method comprises generation test signal, launches test signal via radio-frequency antenna with the first frequency range, receive corresponding to the current reflective signal testing signal via radio-frequency antenna, and judges whether there is object in the radiation scope of radio-frequency antenna according to current reflective signal and some predetermined coefficient.Wherein, the second frequency range that the first frequency range does not borrows radio-frequency antenna to be used with wireless module overlaps, and predetermined coefficient includes representing the default reflection coefficient existed without object and representing the default reflection coefficient that object exists.

Description

Electronic device with object detection function and object detection method

【Technical field】

The present invention relates to an electronic device and an object detection method, in particular to an electronic device with object detection function and an object detection method.

【Background technique】

Wireless communication technology has developed rapidly in recent years, and a wireless communication device using the wireless communication technology transmits or receives radio waves through an antenna. Radio waves are electromagnetic waves, also known as electromagnetic radiation. Electromagnetic radiation uses radiation to transfer energy and has a radiation amount. In addition to emitting or receiving radio waves to generate radiation, wireless communication devices also generate radiation when they are in operation. In order to avoid the impact of radiation on the health or physiology of users, there are certain regulations on the radiation generated by wireless communication devices in the world. For example, the value of specific absorption rate (SAR) of electromagnetic wave energy is used as a standard for judging whether the radiation amount meets the specification.

One of the wireless communication devices that people often use is portable electronic devices, such as mobile phones, tablet computers and notebook computers. In order to control the amount of radiation generated by portable electronic devices during operation, in the existing technology, a proximity sensor (Proximity Sensor) is added to the electronic device near the wireless wide area network (Wireless Wide Area Network; WWAN) antenna. . The proximity sensor is used for human detection, and the radiation amount generated by the electronic device is adjusted according to the detection result. In short, a proximity sensor is used to control the amount of radiation generated by the electronic device to meet the specific absorption rate of electromagnetic wave energy.

However, the existing proximity sensors contain elements made of metal, which will affect the field shape of the aforementioned antenna, and at the same time cause frequency deviation of the antenna to change the operating frequency band of the antenna. In other words, an antenna that is originally suitable for broadband requirements may have a narrower operating frequency band due to the addition of a proximity sensor. Therefore, after the proximity sensor is added to the electronic device, the antenna must be redesigned to meet the original bandwidth requirement. Even electronic products with the same bandwidth requirements may have to design different antennas due to the influence of the proximity sensor. As a result, the cost of producing portable electronic devices also rises accordingly.

【Content of invention】

In view of this, the present invention provides an electronic device with an object detection function and an object detection method for object detection.

In one embodiment, an electronic device with object detection function includes a radio frequency antenna, a wireless module, a coupling circuit, a signal generator and a processing unit. The radio frequency antenna emits test signals in the first frequency band. The wireless module is suitable for the second frequency band, and the second frequency band does not overlap with the first frequency band. The coupling circuit is coupled between the radio frequency antenna and the wireless module. The signal generator is coupled to the coupling circuit and used for generating test signals. The signal detection circuit is coupled to the coupling circuit and used for receiving a current reflection signal corresponding to the test signal via the radio frequency antenna. The processing unit is used for generating judgment results according to the current reflected signal and several preset coefficients. Wherein, the judgment result indicates whether there is an object within the radiation range of the radio frequency antenna, and the preset coefficient includes a preset reflection coefficient representing no object and a preset reflection coefficient representing the existence of an object.

In one embodiment, an object detection method includes generating a test signal, transmitting the test signal in a first frequency band through a radio frequency antenna, receiving a current reflection signal corresponding to the test signal through the radio frequency antenna, and according to the current reflection signal and a number of preset The coefficient determines whether there is an object within the radiation range of the RF antenna. Wherein, the first frequency band does not overlap with a second frequency band used by the wireless module through the radio frequency antenna, and the preset coefficients include a preset reflection coefficient representing the presence of no object and a predetermined reflection coefficient representing the presence of an object.

In summary, according to the electronic device with object detection function and the object detection method of the present invention, the frequency band that does not overlap with the frequency band used by the wireless module is used to transmit test signals and judge the radio frequency antenna according to the reflected signal of the corresponding test signal. Whether there is an object in the radiation range, so that the electronic device can meet the wireless communication products of different specifications without redesigning the structure of the radio frequency antenna, so as to reduce the production cost.

【Description of drawings】

FIG. 1 is a functional block diagram of an electronic device with an object detection function according to a first embodiment of the present invention.

FIG. 2 is a functional block diagram of an electronic device with object detection function according to a second embodiment of the present invention.

FIG. 3 is a flowchart of an object detection method according to a first embodiment of the present invention.

FIG. 4 is a flowchart of an object detection method according to a second embodiment of the present invention.

FIG. 5 is a flowchart of an embodiment of FIG. 4 according to the present invention.

【detailed description】

FIG. 1 is a functional block diagram of an electronic device with an object detection function according to a first embodiment of the present invention. Please refer to FIG. 1 , the electronic device 1 includes a radio frequency antenna 11 , a signal detection circuit 12 , a coupling circuit 13 , a signal generator 14 , a processing unit 15 and a wireless module 16 . The coupling circuit 13 is coupled between the RF antenna 11 and the wireless module 16 , between the RF antenna 11 and the signal generator 14 , and between the RF antenna 11 and the signal detection circuit 12 . The signal detection circuit 12 is coupled to the coupling circuit 13 , the signal generator 14 and the wireless module 15 . The signal generator 14 is coupled between the coupling circuit 13 and the processing unit 15 .

The signal generator 14 generates a test signal S1 and transmits the test signal S1 through the radio frequency antenna 11 in a first frequency band. Next, the signal detection circuit 12 receives the current reflected signal S2 corresponding to the test signal S1 via the RF antenna 11 . The processing unit 15 generates a judgment result R1 according to the current reflected signal S2 and several preset coefficients C1. Here, the judgment result R1 indicates whether there is an object within the radiation range of the RF antenna 11 , and the preset coefficient C1 includes a preset reflection coefficient indicating the presence of the object and a preset reflection coefficient indicating the absence of the object.

When performing object detection, the wireless module 16 also transmits radio frequency signals in the second frequency band through the radio frequency antenna 11 . In order to avoid mutual interference between the test signal S1 and the radio frequency signal sent by the wireless module 16 , the first frequency band used by the radio frequency antenna 11 does not overlap with the second frequency band. For example, the second frequency band supported by the wireless module 16 is the 700Mhz frequency band and the 900Mhz frequency band in the 4G wireless network. Therefore, the first frequency band is to select an unused 1800Mhz frequency band in the 4G wireless network. Alternatively, the first frequency band may be a completely different frequency band from the 4G wireless network, such as 2.4GHz. Here, although 4G is taken as an example, the present invention is not limited thereto. The second frequency band supported by the wireless module 16 can also be 2G, 2.5G, 2.75G, 3G, 3.5G, 3.75G, 3.9G or 5G and other communication technologies covered frequency bands.

As shown in FIG. 1 , the processing unit 15 includes a voltage generator 150 . The input terminal of the signal generator 14 is coupled to the output terminal of the voltage generator 150 . The signal generator 14 receives the voltage signal V1 generated by the voltage generator 150 and generates a test signal S1 according to the voltage signal V1. Here, the frequency of the test signal S1 corresponds to the voltage value of the voltage signal V1. The voltage generator 150 generates voltage signals V1 with different voltage values to control the signal generator 14 to generate test signals S1 with corresponding different frequencies. In an embodiment, the signal generator 14 may be implemented by a voltage-controlled oscillator (Voltage-Controlled Oscillator; VCO). Wherein, the voltage controlled oscillator is well known in the art, so its detailed circuit structure and operation will not be repeated here.

In an embodiment, the voltage generator 150 may be implemented by a digital-to-analog converter (Digital-to-Analog Converter; DAC). Wherein, the digital-to-analog converter is well known in the art, so its detailed circuit structure and operation will not be repeated here. For example, the digital-to-analog converter receives a digital signal generated by a previous bit-based control circuit (not shown) and generates a voltage signal V1 with a corresponding voltage value accordingly. Therefore, changing the digital code of the digital signal can cause the voltage generator 150 to output the voltage signal V1 with different voltage values. In another embodiment, the voltage generator 150 can also be realized by a combination of a pulse width modulator (Pulse Width Modulator; PWM) and a filter.

The coupling circuit 13 is arranged on the signal transmission path (radio frequency signal, test signal S1 and reflection signal S2 ) between the wireless module 16 , the signal generator 14 , the signal detection circuit 12 and the radio frequency antenna 11 . In other words, the signal generator 14 can transmit the test signal S1 outputted by it to the radio frequency antenna 11 through the coupling circuit 13 . Similarly, the coupling circuit 13 is also configured on the path where the radio frequency signal (not shown) generated by the wireless module 163 is transmitted to the radio frequency antenna 11 . The radio frequency antenna 11 can also transmit the reflected signal S2 received by it to the signal detection circuit 12 through the coupling circuit 13 .

As shown in FIG. 1 , the coupling circuit 13 includes a first coupler 130 and a second coupler 131 . The first coupler 130 is coupled between the RF antenna 11 and the signal detection circuit 12 . The second coupler 131 is coupled between the first coupler 130 and the wireless module 16 , and is coupled between the signal generator 14 and the wireless module 16 . In other words, the first end of the second coupler 131 is coupled to the first coupler 130, the second end of the second coupler 131 is coupled to the wireless module 16, and the third end of the second coupler 131 is coupled to the signal generator 14 output terminals. The test signal S1 generated by the signal generator 14 is transmitted to the RF antenna 11 through the second coupler 131 and the first coupler 130 in sequence, and then transmitted by the RF antenna 11 . The radio frequency signal generated by the wireless module 16 is also transmitted to the radio frequency antenna 11 through the second coupler 131 and the first coupler 130 in sequence, and then transmitted by the radio frequency antenna 11 . The reflected signal S2 received by the RF antenna 11 is transmitted to the signal detection circuit 12 through the first coupler 130 , and then provided to the processing unit 15 for object detection.

As shown in FIG. 1 , the signal detection circuit 12 includes a mixer 120 and an amplifier 121 . The mixer 120 and the amplifier 121 are sequentially connected in series between the coupling circuit 13 and the processing unit 15 . Two input terminals of the mixer 120 are respectively coupled to the output terminal of the first coupler 130 and the output terminal of the signal generator 14 . The mixer 120 receives the current reflected signal S2 corresponding to the test signal S1 via the RF antenna 11 and the first coupler 130 . The mixer 120 down-converts the current reflection signal S2 according to the test signal S1. Since the test signal S1 has the same frequency as the current reflection signal S2 , the mixer 120 cancels the phase of the current reflection signal S2 according to the test signal S1 to generate a DC signal S3 whose reflection amount is proportional to the current reflection signal S2 . In other words, the DC signal S3 is the DC component representing the amount of reflection in the current reflection signal S2. The amplifier 121 receives the DC signal S3 generated by the mixer 120 and amplifies the DC signal S3 to generate an amplified DC signal S4.

The processing unit 15 includes an Analog-to-Digital Converter 151 (Analog-to-Digital Converter) and a judgment module 152 , and the Analog-to-Digital Converter 151 and the judgment module 152 are serially connected between the amplifier 121 and the power adjustment unit 18 . The input terminal of the analog-to-digital converter 151 is coupled to the output terminal of the amplifier 121 . The analog-to-digital converter 151 receives the DC signal S4 generated by the amplifier 121 and converts the voltage of the DC signal S4 into a corresponding digital code (ie, the current reflection coefficient C2 ). The judgment module 152 receives the current reflection coefficient C2 generated by the analog-to-digital converter 151 , and compares the current reflection coefficient C2 with each preset coefficient C1 to generate a judgment result R1 . In other words, when the preset coefficient C1 has a preset reflection coefficient indicating the presence of the object and a preset reflection coefficient indicating the absence of the object, the judging module 152 compares the current reflection coefficient C2 with the preset reflection coefficient indicating the presence of the object and converts The current reflection coefficient C2 is compared with a preset reflection coefficient indicating the absence of the object. In an embodiment, the judging module 152 can be realized by a comparator.

The current reflected signal S2 is reflected by the test signal S1 colliding with an object within the radiation range of the radio frequency antenna 11 . The preset coefficient C1 is obtained through experiments in advance before the electronic device 1 performs object detection. The field pattern of the current reflected signal S2 corresponding to the test signal S1 of a specific frequency is converted into a digital code by using the radio frequency antenna 11 as the preset coefficient C1. The electronic device 1 includes a storage unit 17 . The preset coefficient C1 is stored in the storage unit 17 . The output terminal of the processing unit 15 is coupled to the control terminal of the storage unit 17 . The processing unit 15 controls the storage unit 17 to read the preset coefficient C1. In one embodiment, the storage unit 17 can be implemented by a read-only memory (Read-Only Memory).

Before the electronic device 1 performs object detection, a preset reflection coefficient is generated by setting different objects and not setting objects within the radiation range of the radio frequency antenna 11 . In one embodiment, the type of object may be a wooden object, a metal object or a human body. For example, first place a wooden object within the radiation range of the radio frequency antenna 11 . Test signals S1 with different frequencies are transmitted via the radio frequency antenna 11 and corresponding current reflected signals S2 are received. The current reflection coefficient C2 is generated through the first coupler 130, the signal detection circuit 12 and the analog-to-digital converter 151 in sequence as a preset reflection coefficient indicating the presence of a wooden object (hereinafter referred to as the wooden object reflection coefficient) . Also, possible wooden object reflection coefficients are generated according to different wooden objects.

Next, the wooden object is replaced with a different metal object, and the above process is repeated to generate the current reflection coefficient C2 as a preset reflection coefficient indicating the existence of the metal object (hereinafter referred to as the metal object reflection coefficient). Then replace the metal object with a different human body to generate the current reflection coefficient C2 as the preset reflection coefficient indicating the existence of the human body (hereinafter referred to as the human body reflection coefficient). Finally, no object is set within the radiation range of the radio frequency antenna 11 to generate the current reflection coefficient C2 as a preset reflection coefficient indicating no object exists (hereinafter referred to as no object reflection coefficient). Based on this, when the electronic device 1 performs object detection, the processing unit 15 reads the storage unit 17 to obtain each preset coefficient C1. The judging module 152 compares the current reflection coefficient C2 with the reflection coefficient of wooden objects, compares the current reflection coefficient C2 with the reflection coefficient of metal objects, compares the current reflection coefficient C2 with the reflection coefficient of the human body, and compares the current reflection coefficient C2 with Object reflection coefficients are compared to generate a judgment result R1.

As shown in FIG. 1 , the electronic device 1 further includes a power adjustment unit 18 coupled between the processing unit 15 and the wireless module 16 . The power adjustment unit 18 receives the judgment result R1 generated by the processing unit 15 to adjust the power of the wireless module 16 . When the current reflection coefficient C2 is equal to the human body reflection coefficient, the power adjustment unit 18 generates a control signal to reduce the output power of the wireless module 16 . When the current reflection coefficient C2 is equal to the reflection coefficient of the metal object, the reflection coefficient of the wooden object or the reflection coefficient of no object, the power adjustment unit 18 maintains the output power of the wireless module 16 .

In some embodiments, in order to perform object detection repeatedly, the test signal S1 generated by the signal generator 14 includes sub-signals with different frequencies, and the generation times of the sub-signals do not overlap with each other. The RF antenna 11 repeatedly transmits the test signal S1 to sequentially transmit each sub-signal. Moreover, the radio frequency antenna 11 sequentially receives the current reflected signal S2 corresponding to each sub-signal. The processing unit 15 generates a current reflection coefficient C2 based on the frequency of each sub-signal and the corresponding current reflection signal S2, and generates a judgment result R1 according to the current reflection coefficient C2.

For example, taking the test signal S1 as an example with 3 sub-signals, the number of sub-signals depends on the number of actual detections (for the convenience of description, the voltage signal V1 generated for the first time, the test signal emitted for the first time will be S1, the current reflection signal S2 received for the first time, the current reflection coefficient C2 generated for the first time and the judgment result R1 are respectively called the first voltage signal, the first sub-signal, the first reflection signal, the first reflection coefficient and the first reflection coefficient. A judgment result, the voltage signal V1 generated for the second time, the test signal S1 emitted for the second time, the current reflection signal S2 received for the second time, the current reflection coefficient C2 generated for the second time, and the judgment result R1 are respectively referred to as the second voltage signal, the second sub-signal, the second reflection signal, the second reflection coefficient, and the second judgment result, and the rest can be deduced like this).

The signal generator 14 receives the first voltage signal to generate a first sub-signal. The radio frequency antenna 11 transmits the first sub-signal and receives a first reflected signal corresponding to the first sub-signal. The DC signal S4 is generated through the first coupler 130 and the signal detection circuit 12 in sequence. The analog-to-digital converter 151 converts the DC signal S4 to generate a first reflection coefficient according to the frequency of the first sub-signal and the first reflection signal. The judging module 152 generates a first judging result according to the first reflection coefficient and the preset coefficient C1.

Next, the voltage generator 150 generates a second voltage signal having a different voltage value from the first voltage signal. The signal generator 14 receives the second voltage signal to generate a second sub-signal having a different frequency from the first sub-signal. The radio frequency antenna 11 transmits the second sub-signal and receives the second reflected signal. The second reflection coefficient is generated through the first coupler 130 , the signal detection circuit 12 , and the analog-to-digital converter 151 in sequence. The judging module 152 generates a second judging result according to the second reflection coefficient and the preset coefficient C1. Finally, the above process is repeated to generate a third judgment result. Wherein, the voltage value of the third voltage signal is different from that of the first voltage signal and the second voltage signal. Moreover, the frequency of the third sub-signal is also different from that of the first sub-signal and the second sub-signal.

FIG. 2 is a functional block diagram of an electronic device according to a second embodiment of the present invention. Please refer to FIG. 2 . Compared with the first embodiment, the signal generating circuit 12 includes two detectors (for convenience of description, hereinafter respectively referred to as a first detector 122 and a second detector 123 ) and an amplifier 124 . The first detector 122 is coupled to the first coupler 130 . The current reflected signal S2 corresponding to the test signal S1 is transmitted to the amplifier 124 via the RF antenna 11 , the first coupler 130 , and the first detector 122 in sequence. The amplifier 124 amplifies the current reflection signal S2 and transmits the amplified current reflection signal S6 to the processing unit 15 . The second detector 123 is coupled to the second coupler 131 to detect the operation of the wireless module 16 to generate a detection signal S5. The processing unit 15 generates a judgment result R1 according to the detection signal S5.

Wherein, the first detector 122 only transmits the current reflection signal S2 to the amplifier 124 for amplification processing, but does not perform frequency mixing processing on the current reflection signal S2. When the wireless module 16 transmits a radio frequency signal through the radio frequency antenna 11 at the same time, the current reflected signal S2 may contain a reflection amount corresponding to the radio frequency signal, which may cause the processing unit 15 to make a misjudgment when detecting an object.

Therefore, the processing unit 15 determines whether to generate the judgment result R1 according to the detection signal S5 to avoid misjudgment. In some embodiments, when the detection signal S5 indicates that the wireless module 16 is working, the processing unit 15 does not generate the determination result R1 or does not output the determination result R1. Alternatively, the processing unit 15 turns off the signal generator 14 and the signal detection circuit 12 to stop object detection to avoid misjudgment. Conversely, when the detection signal S5 indicates that the wireless module 16 is not working, the processing unit 15 generates a judgment result R1 according to the amplified current reflection signal S6 and the preset coefficient C1.

FIG. 3 is a flowchart of an object detection method according to a first embodiment of the present invention. Please refer to FIG. 3 , the object detection method includes generating a test signal S1 (step S110), transmitting the test signal S1 in a first frequency band via the radio frequency antenna 11 (step S120), receiving the current reflection signal corresponding to the test signal S1 via the radio frequency antenna 11 S2 (step S130 ), and the processing unit 15 judges whether there is an object within the radiation range of the radio frequency antenna 11 according to the current reflected signal S2 and several preset coefficients C1 (step S140 ). In some embodiments, when there is an object within the radiation range of the radio frequency antenna 11, the power adjustment unit 18 adjusts the power of the wireless module 16 (step S150).

In some embodiments, in step S110 , the voltage generator 150 generates a voltage signal V1 having a voltage value, and the signal generator 14 receives the voltage signal V1 to generate a test signal S1 .

In some embodiments, in step S140 , the mixer 120 generates a DC signal S3 whose reflection amount is proportional to the current reflection signal S2 . The amplifier 121 amplifies the DC signal S3. The analog-to-digital converter 151 generates the current reflection coefficient C2 based on the amplified DC signal S4. The processing unit 15 reads the storage unit 17 to obtain several preset coefficients C1. The processing unit 15 compares the current reflection signal S2 with the preset coefficient C1 to determine whether the object exists within the radiation range of the radio frequency antenna 11 . In other words, the processing unit 15 uses the judging module 152 to combine the current reflection coefficient C2 with each of several preset reflection coefficients C1 to generate a judgment result R1.

In some embodiments, the test signal S1 has several sub-signals with different frequencies, step S110 to step S130 are repeatedly executed to sequentially transmit each sub-signal and receive the current reflected signal S2 corresponding to each sub-signal, the processing unit 15 generates a current reflection coefficient C2 based on the frequency of each sub-signal and the current reflection signal S2, and the processing unit 15 generates a judgment result R1 according to the current reflection coefficient C2 and each preset reflection coefficient C1.

FIG. 4 is a flowchart of an embodiment of FIG. 3 according to the present invention. Referring to Fig. 4, in step S140, the amplifier 124 amplifies the current reflection signal S2 (step S141), the processing unit 15 generates the current reflection coefficient C2 according to the amplified current reflection signal S6 (step S142), and the processing unit 15 then According to the current reflection coefficient C2 and a number of preset reflection coefficients C1 to generate a judgment result R1 (step S143), the second detector 123 detects the operation of the wireless module 16 to generate a detection signal S5 (step S144), that is, to detect The test signal S5 indicates that the wireless module 16 is in a working state or a non-working state. The processing unit 15 receives the detection signal S5 and outputs a judgment result R1 based on the detection signal S5. When the detection signal S5 indicates that the wireless module 16 is working, the processing unit 15 does not output the judgment result R1 (step S147). In some embodiments, when the detection signal S5 indicates that the wireless module 16 is not working, the processing unit 15 outputs the judgment result R1 (step S146), and the power adjustment unit 18 then adjusts the power of the wireless module 16 according to the judgment result R1 (step S150) .

In some embodiments, when the detection signal S5 indicates that the wireless module 16 is working, the processing unit 15 shuts down the signal generator 14 and the signal detection circuit 12 to replace step S147, or the processing unit 15 does not output the judgment result R1 and shuts down at the same time A signal generator 14 and a signal detection circuit 12 .

In some embodiments, the second detector 123 can detect the operation of the wireless module 16 (step S144 ) before step S110 , step S120 , step 130 , step S141 , step S142 or step S143 , the present invention is not limited thereto.

FIG. 5 is a flowchart of an embodiment of FIG. 3 according to the present invention. Please refer to FIG. 5, in step S140, the second detector 123 detects the operation of the wireless module 16 to generate a detection signal S5 (step S144), that is, the detection signal S5 indicates that the wireless module 16 is in a working state or non-working status. The processing unit 15 receives the detection signal S5 and generates a judgment result R1 based on the detection signal S5. When the detection signal S5 indicates that the wireless module 16 is not working, the processing unit 15 starts to calculate the current reflection signal S2 and each preset coefficient C1. Generate a judgment result R1 (step S149 ), otherwise, when the detection signal S5 indicates that the wireless module 16 is working, the processing unit 15 does not generate a judgment result R1 (step S148 ).

In some embodiments, the power adjustment unit 18 adjusts the power of the wireless module 16 according to the determination result R1. In some embodiments, the second detector 123 can detect the operation of the wireless module 16 (step S144 ) before step S110 , step S120 or step 130 , the invention is not limited thereto.

In summary, according to the electronic device with object detection function and the object detection method of the present invention, the frequency band that does not overlap with the frequency band used by the wireless module is used to transmit test signals and judge the radio frequency antenna according to the reflected signal of the corresponding test signal. Whether there is an object in the radiation range, so that the electronic device can meet the wireless communication products of different specifications without redesigning the structure of the radio frequency antenna, so as to reduce the production cost. Moreover, in the conventional design of the proximity sensor, the proximity sensor needs to be placed next to the antenna, thus occupying the clearance area of the antenna, causing frequency deviation of the antenna and changing the operating frequency band of the antenna. With the design of the present invention, the efficiency of the antenna is improved without occupying the clearance area of the antenna.

Although the present invention has been disclosed by the above embodiments, it is not intended to limit the present invention. Anyone with ordinary knowledge in the technical field can make some changes and modifications without departing from the spirit and scope of the present invention. The scope of protection of the present invention should be defined by the appended claims.

Claims (23)

1. an electronic installation with object detecting function, it is characterised in that including:

One radio-frequency antenna, launches a test signal with one first frequency range；

One wireless module, it is adaptable to one second frequency range, wherein this second frequency range does not overlaps with this first frequency range；

One coupling circuit, is coupled between this radio-frequency antenna and this wireless module；

One signal generator, couples this coupling circuit, to produce this test signal；

One signal detection circuit, couples this coupling circuit, to receive corresponding to this test via this radio-frequency antenna One current reflective signal of signal；And

One processing unit, to produce a judged result according to this current reflective signal and some predetermined coefficient, its In this judged result represent in a radiation scope of this radio-frequency antenna, whether there is an object, and those preset Coefficient includes that representing without object existence one presets reflection coefficient and represent the default reflection that this object exists Coefficient.

There is the electronic installation of object detecting function the most as claimed in claim 1, it is characterised in that this survey Trial signal has the mutually different some subsignals of frequency, and the generation time of those subsignals does not overlaps, with And this processing unit produces one the most instead in order to those frequencies based on those subsignals and this current reflective signal Penetrate coefficient and produce this judged result according to this current reflectance and those default reflection coefficient.

There is the electronic installation of object detecting function the most as claimed in claim 1, it is characterised in that this letter Number circuit for detecting includes:

One frequency mixer, to receive the current reflective signal corresponding to this test signal also via this radio-frequency antenna Produce volume reflection and become a direct current signal of geometric ratio with this current reflective signal；And

One amplifier, with this direct current signal is amplified process, and will amplify after this direct current signal transmission To this processing unit；

Wherein, this processing unit in order to based on this direct current signal to produce a current reflectance, and should Whether front-reflection coefficient and those default reflection coefficient comparisons are to judge in this radiation scope of this radio-frequency antenna There is this object.

There is the electronic installation of object detecting function the most as claimed in claim 1, it is characterised in that this letter Number circuit for detecting includes:

One first detector, to receive the current reflective letter corresponding to this test signal via this radio-frequency antenna Number；

One amplifier, with this current reflective signal is amplified process, and will amplify after this current reflective Signal is sent to this processing unit；And

One second detector, to detect the running of this wireless module to produce a detection signal；

Wherein, this processing unit is more in order to export this judged result according to this detection signal, wherein when this detecting Signal represents that, when this wireless module works, this processing unit does not export this judged result.

There is the electronic installation of object detecting function the most as claimed in claim 4, it is characterised in that when this Detection signal represents when this wireless module works, and this processing unit more closes this signal generator and this signal is detectd Slowdown monitoring circuit.

There is the electronic installation of object detecting function the most as claimed in claim 4, it is characterised in that at this Reason unit is in order to decide whether to perform according to this current reflective signal and some predetermined coefficient according to this detection signal Produce this judged result, and when this detection signal represents that this wireless module works, this processing unit does not produces This judged result raw.

There is the electronic installation of object detecting function the most as claimed in claim 1, it is characterised in that this letter Number circuit for detecting includes:

One first detector, to receive the current reflective letter corresponding to this test signal via this radio-frequency antenna Number；

One amplifier, with this current reflective signal is amplified process, and will amplify after this current reflective Signal is sent to this processing unit；And

One second detector, to detect the running of this wireless module to produce a detection signal；

Wherein, this processing unit, in order to export this judged result according to this detection signal, is wherein believed when this detecting Number represent this wireless module work time, this processing unit closes this signal generator and this signal detection circuit.

There is the electronic installation of object detecting function the most as claimed in claim 1, it is characterised in that this letter Number circuit for detecting is in order to detect the running of this wireless module, when this signal detection circuit detecting is to this wireless module For time in work, this processing unit closes this signal generator and this signal detection circuit.

There is the electronic installation of object detecting function the most as claimed in claim 1, it is characterised in that including:

One storage element, to store those predetermined coefficient.

There is the electronic installation of object detecting function the most as claimed in claim 1, it is characterised in that this thing Body is a human body, a metallic object or a timber body.

11. electronic installations as claimed in claim 1 with object detecting function, it is characterised in that at this Reason unit includes:

One judge module, with this current reflective signal of comparison with those predetermined coefficient to produce this judged result； And

One voltage generator, to produce a magnitude of voltage, wherein this signal generator is to produce according to this magnitude of voltage This test signal, and the frequency of this test signal is corresponding to this magnitude of voltage.

The electronic installation with object detecting function as described in any one in 12. such as claim 1 to 11, its It is characterised by, including:

One power adjustment unit, to adjust the power of this wireless module according to this judged result.

13. 1 kinds of object detection method, it is characterised in that including:

Produce a test signal；

Launch this test signal via a radio-frequency antenna with one first frequency range, wherein this first frequency range not with a nothing One second frequency range that wire module borrows this radio-frequency antenna to be used overlaps；

The current reflective signal corresponding to this test signal is received via this radio-frequency antenna；And

Judge according to this current reflective signal and some predetermined coefficient in a radiation scope of this radio-frequency antenna be No existence one object, wherein those predetermined coefficient include representing without object exist one preset reflection coefficient and Represent the existence of this object one presets reflection coefficient, produces with those predetermined coefficient according to this current reflective signal One judged result.

14. object detection method as claimed in claim 13, it is characterised in that this test signal has frequency The mutually different some subsignals of rate, the generation time of those subsignals does not overlaps, wherein this be penetrated via one Frequently antenna is launched the step of this test signal with one first frequency range and should receive corresponding to this via this radio-frequency antenna The step of one current reflective signal of test signal performs sequentially launch those subsignals and receive corresponding repeatedly This current reflective signal in those subsignals.

15. object detection method as claimed in claim 13, it is characterised in that this is according to this current reflective Signal and some predetermined coefficient judge whether to exist the step of an object in a radiation scope of this radio-frequency antenna Including, those frequencies based on those subsignals and this current reflective signal produce a current reflectance；With And produce this judged result according to this current reflectance and those default reflection coefficient.

16. object detection method as claimed in claim 13, it is characterised in that this is according to this current reflective Signal and some predetermined coefficient judge whether to exist the step of an object in a radiation scope of this radio-frequency antenna Including:

Produce volume reflection and become a direct current signal of geometric ratio with this current reflective signal；

Amplify this direct current signal；

Based on this direct current signal to produce a current reflectance；And

By this current reflectance with those default reflection coefficient comparisons to judge this radiation at this radio-frequency antenna In the range of whether there is this object.

17. object detection method as claimed in claim 13, it is characterised in that this is according to this current reflective Signal and some predetermined coefficient judge whether to exist the step of an object in a radiation scope of this radio-frequency antenna Including:

Amplify this current reflective signal；

A current reflectance is produced according to this current reflective signal after amplifying；

A judged result is produced according to this current reflectance and those default reflection coefficient；

Detect the running of this wireless module to produce a detection signal；And

When this detection signal represents that this wireless module works, do not export this judged result.

18. object detection method as claimed in claim 13, it is characterised in that believe according to this current reflective Number judge whether to exist the step bag of an object in a radiation scope of this radio-frequency antenna with some predetermined coefficient Include:

Amplify this current reflective signal；

A current reflectance is produced according to this current reflective signal after amplifying；

A judged result is produced according to this current reflectance and those default reflection coefficient；Detect this wireless mould The running of block is to produce a detection signal；

When this detection signal represents that this wireless module works, do not export this judged result；And

When this detection signal represents that this wireless module works, close a signal generator and signal detection electricity Road.

19. object detection method as claimed in claim 13, it is characterised in that believe according to this current reflective Number judge whether to exist the step bag of an object in a radiation scope of this radio-frequency antenna with some predetermined coefficient Include:

Detect the running of this wireless module to produce a detection signal；And

When this detection signal represents that this wireless module works, close a signal generator and signal detection electricity Road.

20. object detection method as claimed in claim 13, it is characterised in that this is according to this current reflective Signal and some predetermined coefficient judge whether to exist the step of an object in a radiation scope of this radio-frequency antenna Including:

Detect the running of this wireless module to produce a detection signal；

When this detection signal represents that this wireless module does not works, preset with those according to this current reflective signal Coefficient produces a judged result；And

When this detection signal represents that this wireless module works, do not produce this judged result.

21. object detection method as claimed in claim 13, it is characterised in that believe according to this current reflective Number judge whether to exist the step bag of an object in a radiation scope of this radio-frequency antenna with some predetermined coefficient Include:

Read those predetermined coefficient；And

By this current reflective signal respectively with those predetermined coefficient phase comparisons to judge this spoke at this radio-frequency antenna This object whether is there is in the range of penetrating.

22. object detection method as claimed in claim 13, it is characterised in that signal is tested in this generation one Step include:

Produce a magnitude of voltage；And

Producing this test signal according to this magnitude of voltage, wherein the frequency of this test signal is corresponding to this magnitude of voltage.

The object detection method as described in any one in 23. such as claim 13 to 22, it is characterised in that bag Include:

In the presence of this object, adjust the power of this wireless module.