TWI477789B - Information extracting apparatus and method for adjusting transmitting frequency thereof - Google Patents

Description

Information capture device and transmission frequency adjustment method thereof

The present invention relates to an information capture device, and more particularly to an information capture device that can adjust a transmission frequency for transmitting a signal.

With the advancement of the times, all kinds of electrical equipment has become an indispensable part of people's lives. However, limited to the service life, for example, malfunctions or abnormal operating conditions will inevitably occur on the electrical equipment. Under this circumstance, it is often difficult for the maintenance personnel of the electrical equipment to directly interpret the cause of the failure of the electrical equipment, and the cause of the failure must be determined by disassembling the electrical equipment. As a result, the maintenance personnel will be inconvenienced in maintenance.

In view of this, the present invention provides an information capture device and a transmission frequency adjustment method thereof. The information capturing device may send the signal related to the device information to the portable device at an appropriate sending frequency after extracting the device information of the electrical device. Electronic device.

A transmission frequency adjustment method is suitable for an information capture device, and the method includes the following steps. First, the test signal is sent to the portable electronic device, and the recorded signal generated by the portable electronic device according to the test signal is received. Then, depending on the distortion of the recorded signal, it is determined whether to adjust the transmission frequency of the test signal. If yes, adjusting the transmission frequency of the test signal, and sending the test signal to the portable electronic device again, and returning the test signal to the portable electronic device; if not, sending the associated electrical device according to the adjusted transmission frequency Audio signal to portable electronic device.

In an embodiment of the invention, the step of determining whether to adjust the transmission frequency of the test signal according to the distortion condition of the recorded signal comprises determining whether the distortion condition of the recorded signal is acceptable. If yes, it is decided not to adjust the transmission frequency of the test signal; if not, it is decided to adjust the transmission frequency of the test signal.

In an embodiment of the invention, the step of determining whether the distortion of the recorded signal is acceptable comprises comparing the test signal with the recorded signal. Next, it is determined whether the distortion of the record signal relative to the test signal is higher than a preset threshold. If so, it is unacceptable to judge the distortion of the recorded signal; if not, it is acceptable to judge the distortion of the recorded signal.

In an embodiment of the invention, the step of adjusting the transmission frequency of the test signal and transmitting the test signal to the portable electronic device again includes reducing the transmission frequency and transmitting the test signal at the reduced transmission frequency.

In an embodiment of the invention, the transmission is performed according to the adjusted transmission frequency. Before the step of correlating the audio signal of the electrical device to the portable electronic device, the device information of the electrical device is further included. After that, the device information is converted to an audio signal.

In another aspect, the present invention provides an information capture device adapted to capture device information of an electrical device and forward it to the portable electronic device. The capture device includes a serial port, a processing unit, a signal conversion unit, and a sound source interface. The serial port is coupled to an electrical device. The processing unit is coupled to the serial port to retrieve device information through the serial port. The signal conversion unit is coupled to the processing unit, and converts the device information into an audio signal. The sound source interface is coupled to the signal conversion unit and the portable electronic device to transmit the sound source signal to the portable electronic device. The processing unit sends the test signal to the portable electronic device, and adjusts the transmission frequency of the test signal according to the record signal generated by the portable electronic device in response to the test signal.

In an embodiment of the invention, the processing unit sends the test signal to the portable electronic device through the sound source interface, and receives the record signal generated by the portable electronic device according to the test signal through the sound source interface. Then, the processing unit determines whether to adjust the transmission frequency of the test signal according to the distortion condition of the recorded signal. If yes, the processing unit adjusts the sending frequency of the test signal, and sends the test signal to the portable electronic device again; if not, the processing unit sends the sound source signal associated with the electrical device to the portable electronic device according to the adjusted sending frequency.

In an embodiment of the invention, the processing unit determines whether the distortion condition of the recorded signal is acceptable. If yes, the processing unit determines not to adjust the transmission frequency of the test signal; if not, the processing unit determines to adjust the transmission frequency of the test signal.

In an embodiment of the invention, the processing unit tests the signal and the The recording numbers are compared, and the processing unit determines whether the distortion of the recording signal relative to the test signal is higher than a preset threshold. If so, it is unacceptable to judge the distortion of the recorded signal; if not, it is acceptable to judge the distortion of the recorded signal.

In an embodiment of the invention, the processing unit reduces the transmission frequency and transmits the test signal at the reduced transmission frequency.

Based on the above, the embodiment of the present invention provides an information capture device and a transmission frequency adjustment method thereof, which can enable the information capture device to adjust the information capture device for transmitting signals to the portable device according to the record signal returned by the portable electronic device. The transmission frequency of the electronic device. In this way, when the information capture device transmits the sound source signal (corresponding to the device information of the electrical device) to the portable electronic device, the portable electronic device can receive the sound source signal more correctly, and correspondingly present the electrical device. Device information.

The above described features and advantages of the invention will be apparent from the following description.

100‧‧‧Information capture device

110‧‧‧Chain

120, 220‧ ‧ processing unit

130‧‧‧Signal Conversion Unit

140, 210‧‧‧ audio interface

200‧‧‧Portable electronic devices

A1, A2‧‧‧ area

AS‧‧‧ source signal

EI‧‧‧Device Information

S210~S250‧‧‧Steps

TS, TS_1~TS_3‧‧‧ test signal

TS’, TS_1’~TS_3’‧‧‧ record signal

FIG. 1 is a functional block diagram of an information capture device according to an embodiment of the invention.

2A is a schematic diagram of transmission frequency adjustment between an information capture device and a portable electronic device according to an embodiment of the invention.

FIG. 2B is a schematic diagram of a transmission frequency adjustment method according to an embodiment of the invention. flow chart.

FIG. 3 is a schematic diagram of a signal for adjusting a transmission frequency according to an embodiment of the invention.

FIG. 1 is a functional block diagram of an information capture device according to an embodiment of the invention. In the embodiment, the information capture device 100 includes a serial port 110, a processing unit 120, a signal conversion unit 130, and a sound source interface 140. The specification standard of the serial port 110 is, for example, the more common RS-232, RS-485 or RS-422, etc., but the invention is not limited thereto. The processing unit 120 is coupled to the serial port 110, which can extract device information of an electrical device (not shown) through the serial port 110. The processing unit 120 is, for example, a central processing unit, a microcontroller unit (MCU), or another programmable microprocessor (Microprocessor). The electrical device is, for example, a household electrical appliance that can be connected to the information capture device 100 through the serial port 110, such as a television, a computer, or a disc player, but is not limited thereto.

In an embodiment, when an abnormality occurs in the electrical device, the maintenance personnel can connect the information capturing device 100 and the electrical device through the serial port 110. Then, the processing unit 120 can retrieve the device information EI of the electrical device through the serial port 110, which may include information such as a status abnormality message or a fault message on the electrical device, so that the maintenance personnel can determine the fault condition of the electrical device.

The signal conversion unit 130 is coupled to the processing unit 120, which can be used to convert the device information EI into a corresponding sound source signal AS. The sound source interface 140 is coupled to the signal conversion list Element 130, which can be used to send the sound source signal AS to a portable electronic device (not shown). The portable electronic device is, for example, a recordable device having an element capable of receiving the sound source signal AS (for example, a condenser microphone), such as a Personal Digital Assistant (PDA) mobile phone, a smart phone, a tablet computer or a notebook computer. Wait. In one embodiment, the information capture device 100 can be connected to the portable electronic device through a sound source line, for example, to transmit the measured device information EI to the portable electronic device in the manner of the sound source signal AS. Then, the portable electronic device can convert the sound source signal AS into information that allows the maintenance personnel to know the state of the electrical equipment (such as a status abnormality message or a fault message, etc.), so that the maintenance personnel can judge the operation of the electrical equipment.

In an embodiment, in order to enable the audio signal AS to be transmitted to the portable electronic device, the distortion rate can be effectively reduced. After the information capturing device 100 is connected to the portable electronic device, the information capturing device 100 can be transparent. A specific method to adjust the frequency used to transmit the sound source signal AS. In this way, the portable electronic device can accurately interpret the information in the sound source signal AS, thereby providing correct device information to the maintenance personnel for reference.

2A is a schematic diagram of transmission frequency adjustment between an information capture device and a portable electronic device according to an embodiment of the invention. FIG. 2B is a flowchart of a transmission frequency adjustment method according to an embodiment of the invention. Referring to FIG. 2B, the method provided in this embodiment is suitable for the information capturing device in FIG. 2A. The following detailed description refers to the detailed steps of the embodiment of FIG. 2B in conjunction with the components in FIG. 2A. First, in step S210, the processing unit 120 can send a test signal through the sound source interface 140. The TS is connected to the sound source interface 210 in the portable electronic device 200. After the sound source interface 210 receives the test signal TS, the sound source interface 210 can be forwarded to the processing unit 220. The test signal TS is, for example, a digital signal transmitted at a specific frequency.

In an embodiment, the sound source interface 210 in the portable electronic device 200 is, for example, a sound pickup element implemented by a condenser microphone, but the embodiments of the present invention are not limited thereto. The sound source interface 210 may exhibit different degrees of distortion when receiving sounds, depending on the manufacturing process of each manufacturer. That is, when the sound source interface 210 of the portable electronic device 200 receives and forwards the test signal TS to the processing unit 220, the processing unit 220 may receive the distorted record signal TS'. The record signal TS' is, for example, a digital signal for recording the test signal TS. At this time, since the information capture device 100 needs to transmit the captured device information (for example, the number of freezer switches of the refrigerator) to the portable electronic device 200 through the audio source interfaces 140 and 210, if the audio source interface 210 appears The distortion situation causes the processing unit 220 to fail to receive the correct device information, which may cause the maintenance personnel to misjudge the state of the electrical device.

Therefore, the processing unit 220 can transmit the record signal TS′ (ie, the distorted test signal TS) to the information capture device 100 for the information capture device 100 to adjust for transmission according to the distortion condition of the record signal TS′. Test the transmission frequency of the signal TS. In step S220, the sound source interface 140 in the information capture device 100 can receive the record signal TS' generated by the portable electronic device 200 according to the test signal TS. The sound source interface 140 can forward the record signal TS' sent by the portable electronic device 200 to the processing unit 120 via the signal conversion unit 130.

Next, in step S230, the processing unit 120 can follow the record signal. The distortion situation of TS' determines whether or not to adjust the transmission frequency of the test signal TS. In an embodiment, the processing unit 120 can determine whether the distortion condition of the record signal TS' relative to the test signal TS is acceptable. For example, the processing unit 120 can compare the record signal TS' and the TS, and determine whether the distortion condition meets the requirement according to, for example, the degree of distortion of the record signal TS'. The processing unit 120 can determine whether the distortion level of the record signal TS' relative to the test signal TS (for example, the signal high and low level interpretation error rate) is higher than a preset threshold (for example, 1%). When the degree of distortion is higher than a preset threshold (for example, 1%), the processing unit 120 may determine that the distortion condition of the record signal TS' is unacceptable. On the other hand, when the distortion of the recording signal TS' relative to the test signal TS (for example, the bit error rate) is lower than a preset threshold (for example, 1%), the processing unit 120 can determine the distortion of the recording signal TS'. The situation is acceptable, but embodiments of the invention are not limited thereto.

Since the distortion condition of the record signal TS' is related to the transmission frequency for transmitting the test signal TS, when the processing unit 120 determines that the distortion condition of the record signal TS' is unacceptable, the processing unit 120 can adjust the test in step S240. The transmission frequency of the signal TS is transmitted, and the test signal TS is sent again to the portable electronic device 200. In another aspect, the processing unit 120 can adjust the distortion condition of the record signal TS' by adjusting the transmission frequency of the test signal TS. In detail, those skilled in the art should be able to understand that when the transmission frequency of the test signal TS is high, the sound source interface 210 is more prone to distortion when receiving the test signal TS; and when the test signal TS is transmitted at a higher frequency. When low, the sound source interface 210 is less prone to distortion when receiving the test signal TS. Therefore, when the processing unit 120 determines that it is from the portability When the distortion of the recording signal TS' of the electronic device 200 is severe, the processing unit 120 can know that the transmission frequency for transmitting the test signal TS is too high. Then, the processing unit 120 can reduce the transmission frequency for transmitting the test signal TS (for example, adjusted to half of the original transmission frequency), and send the test signal TS to the portable electronic device 200 again. That is, the processing unit 120 transmits the test signal TS to the portable electronic device 200 again at the reduced transmission frequency.

After step S240, the processing unit 120 may return to step S220 and perform the subsequent steps again. In other words, after the processing unit 120 retransmits the test signal TS to the portable electronic device 200 at the reduced transmission frequency, the processing unit 120 can still determine whether to adjust the test according to the recorded signal TS′ returned by the portable electronic device 200. The transmission frequency of the signal TS. That is, if the processing unit 120 determines that the distortion condition of the record signal TS' is still unacceptable (for example, the distortion is higher than the preset threshold), the processing unit 120 may recursively perform steps S240, S220, and S230 until The distortion condition of the record signal TS' returned by the portable electronic device 200 is acceptable (for example, the distortion is lower than a preset threshold).

In step S230, if the processing unit 120 determines that the distortion condition of the record signal TS' is acceptable, the processing unit 120 may decide not to adjust the transmission frequency of the test signal TS, and then proceed to step S250. In step S250, the processing unit 120 may send the sound source signal associated with the electrical device to the portable electronic device 200 according to the adjusted transmission frequency. In detail, after performing steps S220-S240 recursively, the processing unit 120 may find an appropriate transmission frequency that enables the distortion of the recording signal TS' to be low (for example, the distortion is lower than a preset threshold), thus Processing unit 120 The sound source signal AS (ie, device information of the electrical device) can be sent to the portable electronic device 200 according to the transmission frequency. Since the sound source signal AS has an appropriate transmission frequency, the sound source signal forwarded by the sound source interface 210 in the portable electronic device 200 to the processing unit 220 may have a lower distortion condition. In this way, the portable electronic device 200 can correctly convey the device information of the electrical device to the maintenance personnel, so that the maintenance personnel can smoothly grasp the operating state or the fault condition of the electrical device.

In short, when a user (such as a maintenance person) wants to retrieve the device information of the electrical device through the information capturing device 100, the user can use the information capturing device 100 and the portable electronic device 200 (for example, a tablet computer). The connection is made so that the processing unit 120 in the information capture device 100 can find the transmission frequency suitable for data exchange with the portable electronic device 200 through the test signal TS. Then, the information capturing device 100 can convert the device information captured on the electrical device into a sound source signal (for example, the sound source signal AS in FIG. 1), and send the sound source signal to the portable device according to the appropriate sending frequency. Electronic device 200. After that, the portable electronic device 200 can display the device information of the electrical device, so that the maintenance personnel can know the fault or abnormal situation of the electrical device. In this way, when the maintenance personnel judges the operation of the electrical equipment, it is only necessary to connect the information capturing device 100 between the portable electronic device 200 and the electrical device to understand the operation of the electrical device without the need for the electrical appliance. The device performs operations such as disassembly or handling. That is, the method proposed by the embodiment of the present invention can effectively improve the convenience on detecting electrical equipment.

From another point of view, the information capture device 100 can appropriately adjust the transmission of the transmission signal according to the reception condition of the sound source interface 210 for the test signal TS. frequency. After the appropriate transmission frequency is found, the information capture device 100 can transmit the sound source signal associated with the device information, so that the portable electronic device 200 can correctly interpret the sound source signal sent by the information capture device 100.

FIG. 3 is a schematic diagram of a signal for adjusting a transmission frequency according to an embodiment of the invention. Referring to FIG. 2A and FIG. 3 simultaneously, the manner of adjusting the transmission frequency in this embodiment will be described below with reference to the elements of FIG. 2A. First, the processing unit 120 can send the test signal TS_1 to the sound source interface 210 of the portable electronic device 200 through the sound source interface 140. After the sound source interface 210 receives the test signal TS_1, the record signal TS_1' (for example, the distorted test signal TS_1) may be generated and forwarded to the processing unit 220. Then, the processing unit 220 can transmit the record signal TS_1' back to the information capture device 100.

When the processing unit 120 in the information capture device 100 receives the record signal TS_1', it can determine the distortion of the record signal TS_1'. In the present embodiment, since the recording signal TS_1' exhibits a waveform similar to a sawtooth shape, the processing unit 120 determines that the waveform difference between the recording signals TS_1' and TS_1 is large. That is, the waveform distortion rate of the recording signals TS_1' and TS_1 is higher than a preset threshold (for example, 1%).

Then, the processing unit 120 can reduce the transmission frequency, and then send the test signal TS_2 (for example, the signal that reduces the frequency of the test signal TS_1 to half) to the sound source interface 210 of the portable electronic device 200. After the sound source interface 210 receives the test signal TS_2, the record signal TS_2' (for example, the distorted test signal TS_2) may be generated and forwarded to the processing unit 220. Then, the processing unit 220 can The record signal TS_2' is transmitted back to the information capture device 100. When the processing unit 120 in the information capture device 100 receives the record signal TS_2', it can determine the distortion of the record signal TS_2'.

In this embodiment, although the distortion condition of the record signal TS_2' is less serious than the record signal TS_2, the oscillation situation presented by some areas of the record signal TS_2' (for example, the area A1) may still cause the processing unit 220. The distortion of the received signal (such as the sound source signal) is higher than the preset threshold (for example, 1%). Therefore, the processing unit 120 can reduce the transmission frequency again, and then send the test signal TS_3 (for example, the signal that reduces the frequency of the test signal TS_1 to one-third) to the sound source interface 210 of the portable electronic device 200. After the sound source interface 210 receives the test signal TS_3, the record signal TS_3' (for example, the warped test signal TS_3) may be generated and forwarded to the processing unit 220. Then, the processing unit 220 can transmit the record signal TS_3' back to the information capture device 100. When the processing unit 120 in the information capture device 100 receives the record signal TS_3', it can determine whether the distortion condition of the record signal TS_3' is higher than a preset threshold (for example, 1%).

In the present embodiment, it can be seen that the recording signal TS_3' has a small oscillating situation in an area close to the zero level (e.g., the area A2) with respect to the recording signal TS_2'. Therefore, the processing unit 120 can judge that the distortion condition of the recording signal TS_3' is acceptable. That is, the waveform distortion rate of the recording signals TS_3' and TS_3 is lower than a preset threshold (for example, 1%). Then, the processing unit 120 can send the sound source signal (for example, the signal associated with the device information) to the portable electronic device 200 according to the transmission frequency of the record signal TS_3'.

In summary, the information capture device and the frequency adjustment method thereof according to the embodiments of the present invention enable the information capture device to adjust the transmission frequency for transmitting signals according to different audio source interfaces on the portable electronic device. In turn, the portable electronic device can receive the signal from the information capturing device more correctly. In other words, the information capture device can appropriately adjust the transmission frequency for transmitting signals between them according to the connected portable electronic device. In this way, after the user uses the information capture device to retrieve the device information of the electrical device, the information capture device can send the sound source signal corresponding to the device information to the portable electronic device at an appropriate transmission frequency. Then, the portable electronic device can display the device information more correctly, so that the user (for example, a maintenance person) can grasp the malfunction or abnormal situation of the electrical device.

Although the present invention has been disclosed in the above embodiments, it is not intended to limit the present invention, and any one of ordinary skill in the art can make some changes and refinements without departing from the spirit and scope of the present invention. The scope of the invention is defined by the scope of the appended claims.

S210~S250‧‧‧Steps

Claims (10)

A method for adjusting a transmission frequency is suitable for an information capture device, the method comprising the steps of: transmitting a test signal to a portable electronic device; and receiving a record signal generated by the portable electronic device according to the test signal Determining whether to adjust a transmission frequency of the test signal according to a distortion condition of the record signal; if yes, adjusting the transmission frequency of the test signal, and transmitting the test signal to the portable electronic device again; if not, adjusting according to The subsequent transmission frequency transmits an audio source signal associated with an electrical device to the portable electronic device. The method of claim 1, wherein the step of determining whether to adjust the transmission frequency of the test signal according to the distortion condition of the record signal comprises: determining whether the distortion condition of the record signal is acceptable; Determining not to adjust the transmission frequency of the test signal; and if not, determining to adjust the transmission frequency of the test signal. The method of claim 2, wherein the step of determining whether the distortion condition of the recorded signal is acceptable comprises: comparing the test signal with the record signal; determining the record signal relative to the test signal Is one of the distortions higher than one Setting a threshold; if so, determining that the distortion of the recorded signal is unacceptable; and if not, determining that the distortion of the recorded signal is acceptable. The method of claim 1, wherein the step of adjusting the transmission frequency of the test signal and transmitting the test signal to the portable electronic device again comprises: reducing the transmission frequency; and reducing the transmission frequency; The transmission frequency sends the test signal. The method of claim 1, wherein before the step of transmitting the sound source signal associated with the electrical device to the portable electronic device according to the adjusted transmission frequency, the method further comprises: capturing the electrical device a device information; and converting the device information to the sound source signal. An information capture device is adapted to capture information about a device of an electrical device and forward it to a portable electronic device, the capture device comprising: a serial port coupled to the electrical device; and a processing unit The device is coupled to the serial port to capture the device information; the signal conversion unit is coupled to the processing unit to convert the device information into an audio source signal; and a sound source interface coupled to the signal conversion unit and The portable electronic device transmits the sound source signal to the portable electronic device. The processing unit sends a test signal to the portable electronic device, and adjusts a transmission frequency of the test signal according to the recorded signal generated by the portable electronic device in response to the test signal. The information capture device of claim 6, wherein the processing unit transmits the test signal to the portable electronic device through the sound source interface, and receives the portable electronic device through the sound source interface according to the test The processing signal generated by the signal; the processing unit determines whether to adjust the sending frequency of the test signal according to a distortion condition of the recording signal; if yes, the processing unit adjusts the sending frequency of the test signal, and sends the test signal again To the portable electronic device; if not, the processing unit sends an audio source signal associated with an electrical device to the portable electronic device according to the adjusted transmission frequency. The information capture device of claim 7, wherein the processing unit determines whether the distortion condition of the record signal is acceptable; if so, the processing unit determines not to adjust the transmission frequency of the test signal; If not, the processing unit determines to adjust the transmission frequency of the test signal. The information capture device of claim 8, wherein the processing unit compares the test signal with the record signal, and the processing unit determines whether the distortion of the record signal relative to the test signal is high. a predetermined threshold; if so, determining that the distortion of the recorded signal is unacceptable; If not, it is determined that the distortion of the recorded signal is acceptable. The information capture device of claim 7, wherein the processing unit reduces the transmission frequency and transmits the test signal at the reduced transmission frequency.