CN107332630B - Signal testing device - Google Patents
Signal testing device Download PDFInfo
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- CN107332630B CN107332630B CN201710637144.1A CN201710637144A CN107332630B CN 107332630 B CN107332630 B CN 107332630B CN 201710637144 A CN201710637144 A CN 201710637144A CN 107332630 B CN107332630 B CN 107332630B
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- 238000012360 testing method Methods 0.000 title claims abstract description 67
- 238000012545 processing Methods 0.000 claims abstract description 104
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- 238000010586 diagram Methods 0.000 claims description 18
- 238000001914 filtration Methods 0.000 claims description 10
- 230000005693 optoelectronics Effects 0.000 claims description 6
- 230000005856 abnormality Effects 0.000 claims description 3
- 238000000034 method Methods 0.000 abstract description 16
- 239000002699 waste material Substances 0.000 abstract description 3
- 238000011056 performance test Methods 0.000 abstract 1
- 239000003990 capacitor Substances 0.000 description 5
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- 238000013461 design Methods 0.000 description 1
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Classifications
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B17/00—Monitoring; Testing
- H04B17/20—Monitoring; Testing of receivers
- H04B17/29—Performance testing
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S7/00—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00
- G01S7/48—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S17/00
- G01S7/483—Details of pulse systems
- G01S7/486—Receivers
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S7/00—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00
- G01S7/48—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S17/00
- G01S7/497—Means for monitoring or calibrating
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S7/00—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00
- G01S7/52—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S15/00
- G01S7/52004—Means for monitoring or calibrating
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S7/00—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00
- G01S7/52—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S15/00
- G01S7/523—Details of pulse systems
- G01S7/526—Receivers
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/06—Receivers
- H04B1/16—Circuits
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- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Radar, Positioning & Navigation (AREA)
- Remote Sensing (AREA)
- Signal Processing (AREA)
- Electromagnetism (AREA)
- Investigating Or Analyzing Materials By The Use Of Ultrasonic Waves (AREA)
Abstract
The embodiment of the invention discloses a signal testing device, which comprises: the system comprises a first input interface, a signal processing module, a microprocessor and a display module; the first input interface is electrically connected with the signal receiving circuit and is used for receiving multiple paths of electric signals output by the plurality of signal receivers; the input end of the signal processing module is electrically connected with the first input interface, and the output end of the signal processing module is electrically connected with the microprocessor and is used for processing multiple paths of electric signals; the microprocessor is used for judging and processing based on the processed multipath electric signals, determining an abnormal signal receiver, and sending a prompt signal to the display module for display. The technical scheme provided by the embodiment of the invention can solve the problem that the traditional performance test method of the signal receiving device wastes manpower and time.
Description
Technical Field
The embodiment of the invention relates to a signal testing technology, in particular to a signal testing device.
Background
Indoor positioning technology is currently receiving increasing attention. For example, to achieve better scene reproduction techniques for VR devices, various accurate positioning methods are required to position the user's head and hands; in order to track the position of the indoor robot, the indoor robot needs to be positioned, so that the control of the robot is facilitated.
In order to prevent the problem of positioning failure caused by the occlusion of the signal from the signal transmitter, signals in various directions can be accepted, and a plurality of signal receivers need to be installed on the signal receiving device of the positioning system.
In order to accurately perform indoor positioning, all signal receivers on the signal receiving device need to work normally, so performance testing needs to be performed on all signal receivers. In the prior art, all signal receivers are tested by using an oscilloscope one by one, which consumes labor, and the test is usually divided into two parts, one test is performed when the signal receiver is mounted on a circuit board, and one test is performed after the signal receiver and/or the signal receiver is assembled into a finished product (signal receiving device), so that time and labor waste is further caused.
Disclosure of Invention
The invention provides a signal testing device which aims to solve the problem that the existing performance testing method wastes manpower and time.
The invention provides a signal testing device, comprising:
the system comprises a first input interface, a signal processing module, a microprocessor and a display module;
the first input interface is electrically connected with the signal receiving circuit and is used for receiving multipath electric signals output by a plurality of signal receivers in the signal receiving circuit;
The input end of the signal processing module is electrically connected with the first input interface, and the output end of the signal processing module is electrically connected with the microprocessor and is used for processing the multipath electric signals;
the microprocessor is used for judging and processing based on the processed electric signals, determining an abnormal signal receiver and sending a prompt signal to the display module for display.
Optionally, the first input interface is specifically configured to receive multiple first electrical signals output by multiple optical signal receivers in the signal receiving circuit and/or multiple second electrical signals output by multiple ultrasonic signal receivers; the signal processing module is specifically configured to convert the multiple first electrical signals into multiple pulse voltage signals, and amplify the multiple second electrical signals; the microprocessor is specifically used for judging and processing based on the multipath pulse voltage signals and the multipath amplified second electric signals, determining an abnormal optical signal receiver and/or an abnormal ultrasonic signal receiver, and sending a prompt signal to the display module for display.
Optionally, the signal testing device further comprises a second input interface; the second input interface is electrically connected with the output end of the signal receiving device provided with the signal receiving circuit and is used for acquiring the multipath electric signals output by the signal receiving device provided with the signal receiving circuit and transmitting the multipath electric signals to the microprocessor.
Optionally, the signal processing module includes a plurality of photoelectric processing units corresponding to the multiple paths of first electric signals one by one; the photoelectric processing unit includes: a transimpedance amplifier, a filter, and an envelope detector; the input end of the transimpedance amplifier is electrically connected with the first input interface through the input end of the photoelectric processing unit and is used for converting a plurality of paths of first electric signals received by the first input interface from current signals to pulse voltage signals; the input end of the filter is electrically connected with the output end of the transimpedance amplifier, and the output end of the filter is electrically connected with the input end of the envelope detector and is used for filtering noise in the pulse voltage signal; the envelope detector is used for filtering the electric signals generated by the interference light source from the pulse voltage signals and outputting the pulse voltage signals to the microprocessor.
Optionally, the signal processing module includes a plurality of acousto-electric processing units corresponding to the multipath second electric signals one by one; the input end of the acousto-electric processing unit is electrically connected with the first input interface and is used for amplifying and filtering the second electric signals and outputting the amplified and filtered second electric signals to the microprocessor respectively.
Optionally, the microprocessor acquires the frequency of each path of the first electric signal based on the multipath pulse voltage signals, if the difference between the frequency and the set frequency is greater than a first set threshold value, determining that an abnormality occurs in an optical signal receiver corresponding to the path of the first electric signal, and sending prompt information to the display module for display; the microprocessor acquires the amplitude values of different wave peaks in each voltage signal of each path of second electric signal based on the multipath amplified second electric signals, compares the amplitude values with the set amplitude values, determines that an ultrasonic signal receiver corresponding to the path of second electric signal is abnormal if the number of wave peaks exceeding the set amplitude values is smaller than a second set threshold value, and sends prompt information to the display module for display.
Optionally, the microprocessor acquires graphic data of each path of the second electric signal based on the second electric signals amplified by the multiple paths, and sends the graphic data to the display module for display.
Optionally, the microprocessor includes a number acquisition unit and a graphics acquisition unit; the number acquisition unit is used for calculating the number of pulses of the first electric signal received in unit time and calculating the number of wave peaks exceeding a set amplitude value in each voltage signal in each path of second electric signal; the graphic acquisition unit is used for converting each path of second electric signals from analog quantity to digital quantity and converting the digital quantity into graphic data.
Optionally, the display module includes a plurality of display lamps corresponding to the plurality of signal receivers one by one; the display lamp is used for changing the state displayed by the display lamp when receiving the prompt signal of the corresponding signal receiver sent by the microprocessor.
Optionally, the display module includes a plurality of display lamps corresponding to the plurality of optical signal receivers one by one, and/or a plurality of display lamps corresponding to the plurality of ultrasonic signal receivers one by one; the display lamp is used for changing the state displayed by the display lamp when receiving the prompting signals of the corresponding optical signal receiver and/or the ultrasonic signal receiver sent by the microprocessor.
Optionally, the display module includes at least one display screen; the display screen is used for displaying the waveform diagram of each path of second electric signal according to the prompt signal sent by the microprocessor.
Optionally, the relative positional relationship of the plurality of display lamps of the display module is the same as the relative positional relationship of the plurality of corresponding signal receivers on the signal receiving circuit.
The signal testing device provided by the embodiment of the invention comprises a first input interface, a signal processing module, a microprocessor and a display module. The first input interface is electrically connected with a signal receiving circuit to be tested and is used for receiving multipath electric signals output by a plurality of signal receivers in the signal receiving device in a one-to-one correspondence manner; the signal processing module is electrically connected with the input interface and is used for processing the multipath electric signals; the microprocessor performs fault judgment according to the multipath processed electric signals, and determines abnormal electric signals, so that an abnormal signal receiver is determined according to the corresponding relation, and a prompt signal is sent to the display module for display. The scheme can detect a plurality of signal receivers on the signal receiving circuit simultaneously, and does not need to detect all the signal receivers one by using an oscilloscope like the existing test method, so that manpower and time can be saved.
Drawings
FIG. 1 is a block diagram of a signal testing device according to an embodiment of the present invention;
FIG. 2 is a block diagram of another signal testing device according to an embodiment of the present invention;
FIG. 3 is a block diagram of a third signal testing device according to an embodiment of the present invention;
FIG. 4 is a block diagram of an optoelectronic processing unit provided by an embodiment of the present invention;
fig. 5 is a block diagram of an electroacoustic processing unit provided in an embodiment of the present invention;
fig. 6 is a block diagram of a display lamp according to an embodiment of the present invention.
Fig. 7 is a diagram showing a spatial arrangement relationship between an optical signal receiver and an ultrasonic signal receiver on a signal receiving circuit and an LED lamp on a display module according to an embodiment of the present invention.
Detailed Description
The invention is described below with reference to the drawings and the embodiments the invention is described in further detail. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting thereof. It should be further noted that, for convenience of description, only some, but not all of the structures related to the present invention are shown in the drawings.
Referring to fig. 1, fig. 1 is a block diagram of a signal testing device according to an embodiment of the present invention, where the signal testing device includes; a first input interface 11, a signal processing module 2, a microprocessor 3 and a display module 4;
The first input interface 11 is electrically connected with the signal receiving circuit and is used for receiving multiple paths of electric signals output by a plurality of signal receivers in the signal receiving circuit;
the input end of the signal processing module 2 is electrically connected with the first input interface 11, and the output end of the signal processing module is electrically connected with the microprocessor 3 and is used for processing multiple paths of electric signals;
the microprocessor 3 is used for determining an abnormal signal receiver based on the processed electric signals and sending a prompt signal to the display module 4 for display.
The signal testing device provided by the embodiment of the invention comprises a first input interface, a signal processing module, a microprocessor and a display module. The first input interface is electrically connected with a signal receiving circuit to be tested and is used for receiving multipath electric signals output by a plurality of signal receivers in the signal receiving device in a one-to-one correspondence manner; the signal processing module is electrically connected with the input interface and is used for processing the multipath electric signals; the microprocessor performs fault judgment according to the multipath processed electric signals, and determines abnormal electric signals, so that an abnormal signal receiver is determined according to the corresponding relation, and a prompt signal is sent to the display module for display. The scheme can detect a plurality of signal receivers on the signal receiving circuit simultaneously, and does not need to detect all the signal receivers one by using an oscilloscope like the existing test method, so that manpower and time can be saved.
On the basis of the above embodiment, referring to fig. 2, fig. 2 is a schematic diagram of another signal testing device according to an embodiment of the present invention, and optionally, the signal testing device further includes a second input interface 12;
the second input interface 12 is electrically connected to an output terminal of a signal receiving apparatus mounted with a signal receiving circuit and a signal processing module, and is used for acquiring processed multipath electric signals output by the signal receiving apparatus when the signal receiving circuit and the signal processing module are mounted on the signal receiving apparatus. Wherein the functions of the signal processing module installed in the signal receiving apparatus and the signal processing module 2 in the signal testing apparatus are identical. The output of the second input interface 12 is electrically connected to the microprocessor 3.
Because the signal receiver installed on the signal receiving circuit board needs to be tested once, when the whole signal receiving circuit can work, the signal testing device is connected with the signal receiving circuit board through the first input interface 11, so that the signal receiving circuit is accessed to obtain multiple paths of electric signals, and the first test is completed.
When the assembly of the signal receiving device is completed, in order to prevent the signal receiver on the signal receiving circuit board from being damaged in the assembly process, a second test is required, the signal receiving device is provided with an output end, the signal testing device is electrically connected with the output end of the signal receiving device through the second input interface 12, the processed multipath electric signals are obtained, the second test is completed, the second test is verified that the processed multipath electric signals output by the signal processing module in the signal receiving device are verified, and whether the signal processing module in the signal receiving device is abnormal or not can be verified through verifying whether the multipath electric signals are abnormal or not.
In this embodiment, two tests share one signal testing device, and because the interfaces required by the two tests are different, two input interfaces, namely, the first input interface 11 and the second input interface 12, are provided, so that a user can conveniently detect signals of the signal receiving circuit board and the signal receiving device.
Optionally, the first input interface 11 is specifically configured to receive multiple first electrical signals output by multiple optical signal receivers in the signal receiving circuit and/or multiple second electrical signals output by multiple ultrasonic signal receivers; the signal processing module 2 is specifically configured to convert multiple first electrical signals into multiple pulse voltage signals, and amplify multiple second electrical signals; the microprocessor 3 is specifically configured to determine an abnormal optical signal receiver and/or an abnormal ultrasonic signal receiver based on the multiple pulse voltage signals and the multiple amplified second electrical signals, and send a prompt signal to the display module 4 for display.
The signal receiving device is an indispensable device on indoor positioning equipment, for example, a VR helmet and a VR handle are provided with the signal receiving device, and for an indoor robot, the position of the robot in the indoor space needs to be positioned through the signal receiving device arranged on the robot so as to control the robot. The signal receiving device is generally integrated with a plurality of optical signal receivers and/or ultrasonic signal receivers and/or electromagnetic signal receivers, and is used for receiving all-round signals so as to realize accurate positioning. For example, by a plurality of optical signal receivers to obtain an accurate position fix; or positioning information can be obtained through a plurality of ultrasonic signal receivers, for example, the positioning of an object in a three-dimensional space can be obtained through three ultrasonic signal receivers; or positioning by an optical signal receiver and an ultrasonic signal receiver; or by electromagnetic signals and optical signals.
In a specific embodiment, the positioning is performed by a plurality of optical signal receivers for positioning angles and ultrasonic signal receivers for positioning distances. For example, the signal receiving apparatus may be configured as a sphere, and a plurality of optical signal receivers and ultrasonic signal receivers, for example, 6 optical signal receivers and 7 ultrasonic signal receivers, are cross-distributed on the surface of the sphere, so that the signal receiving apparatus signal receivers may receive the optical signal and the ultrasonic signal in all directions. However, in the process of assembling the signal receiving apparatus, there is a possibility that the optical signal receiver and the ultrasonic signal receiver are damaged, and if damaged, the positioning device cannot achieve accurate positioning, and the optical signal receiver and the ultrasonic signal receiver need to be detected in the process of assembling the signal receiving circuit and the signal receiving apparatus, and a general test method is to detect output signals of the optical signal receiver and the ultrasonic signal receiver one by one through an oscilloscope, and find the damaged optical signal receiver and ultrasonic signal receiver through a manual judgment method.
The signal testing device provided by the embodiment can test all the optical signal receivers and the ultrasonic signal receivers at the same time.
Referring to fig. 1, a first input interface 1 is electrically connected to a signal receiving circuit to be tested, and is used for receiving a first electric signal output by each optical signal receiver and a second electric signal output by each ultrasonic signal receiver in the signal receiving circuit.
The optical signal receiver is capable of converting an optical signal into an electrical signal. Alternatively, the optical signal receiver may be a photodiode, the area of the PN junction of the photodiode is relatively large so as to receive incident light, the photodiode is operated under a reverse voltage, when no light is applied, the reverse current is extremely weak, when light is applied, the reverse current is rapidly increased, and the intensity of light is larger, the reverse current is also larger, the change of light causes the change of the current of the photodiode, so that an electrical signal output by the photodiode can record an optical signal received by the optical signal receiver.
The ultrasonic signal receiver is capable of converting an ultrasonic signal into an electrical signal. Optionally, the ultrasonic signal receiver may be an ultrasonic sensor, and the ultrasonic sensor may be classified into a piezoelectric type, an electric type, a capacitive type, and the like according to a working principle. For example, when the piezoelectric ultrasonic sensor receives ultrasonic vibration, an electrical signal is generated, and thus an ultrasonic signal is recorded by the electrical signal.
The signal processing module 2 is electrically connected to the first input interface 1 and the microprocessor 3, and is configured to process multiple first electrical signals and multiple second electrical signals received by the input interface 1, for example, convert the multiple first electrical signals into multiple pulse voltage signals, amplify and filter the multiple second electrical signals.
The microprocessor 3 compares each path of pulse voltage signal and amplified second electric signal with the optical signal and ultrasonic signal emitted by the emission source, judges abnormal pulse voltage signal and abnormal second electric signal, judges abnormal optical signal receiver according to one-to-one correspondence of pulse voltage signal and optical signal receiver, judges abnormal ultrasonic signal receiver according to one-to-one correspondence of amplified second electric signal and ultrasonic signal receiver, and sends prompt information to the display module 4, and the display module 4 displays serial numbers or other information of the abnormal optical signal receiver and ultrasonic signal receiver, so that a user can obtain the serial numbers or other information, and the abnormal optical signal receiver and ultrasonic signal receiver are replaced.
The signal testing device provided by the embodiment of the invention comprises a first input interface, a signal processing module, a microprocessor and a display module. The input interface is used for being electrically connected with a signal receiving circuit to be tested and used for receiving multiple paths of first electric signals output by multiple optical signal receivers in the signal receiving circuit in one-to-one correspondence and multiple paths of second electric signals output by multiple ultrasonic signal receivers in one-to-one correspondence; the signal processing module is electrically connected with the input interface and is used for processing the multiple first electric signals and the multiple second electric signals, specifically, the multiple first electric signals can be converted into multiple pulse voltage signals, and the multiple second electric signals are amplified and filtered; the microprocessor performs fault judgment according to the processed first electric signals and second electric signals, specifically performs fault judgment on multiple paths of pulse voltage signals and multiple paths of square wave voltage signals, determines abnormal pulse voltage signals and abnormal second electric signals, determines an abnormal optical signal receiver and an abnormal ultrasonic signal receiver according to corresponding relations, and sends prompt signals to the display module for display. The scheme can detect a plurality of optical signal receivers and a plurality of ultrasonic signal receivers on the signal receiving circuit simultaneously, and does not need to detect all the optical signal receivers and the ultrasonic signal receivers one by using an oscilloscope like the existing test method, so that manpower and time can be saved. On the basis of the above embodiment, referring to fig. 2, fig. 2 is a schematic diagram of another signal testing device according to an embodiment of the present invention, and optionally, the signal testing device further includes a second input interface 12;
The first input interface 11 is electrically connected with the output end of the signal receiving circuit and is used for acquiring multiple paths of first electric signals output by a plurality of optical signal receivers in the signal receiving circuit and multiple paths of second electric signals output by a plurality of ultrasonic signal receivers;
the second input interface 12 is electrically connected to an output terminal of the signal receiving apparatus mounted with the signal receiving circuit and the signal processing module, and is configured to obtain multiple first electrical signals and multiple second electrical signals output by the signal receiving apparatus mounted with the signal receiving circuit and the signal processing module when the signal receiving circuit and the signal processing module are mounted on the signal receiving apparatus. Wherein the signal processing module mounted on the signal receiving means and the signal processing module 2 on the signal testing means are of identical design.
Because the optical signal receiver and the ultrasonic signal receiver which are arranged on the signal receiving circuit board need to be tested once, when the whole signal receiving circuit can work, the signal testing device is connected with the signal receiving circuit board through the first input interface 11, so that the signal receiving circuit is accessed to obtain multiple paths of first electric signals and multiple paths of second electric signals, and the first test is completed.
When the assembly of the signal receiving device is completed, in order to prevent the ultrasonic signal receiver and the optical signal receiver on the signal receiving circuit board from being damaged in the assembly process, a second test is required, the signal receiving device is provided with an output end, and the signal testing device is electrically connected with the output end of the signal receiving device through the second input interface 12 so as to be connected into the signal receiving circuit, acquire multiple paths of first electric signals and multiple paths of second electric signals, and complete the second test.
In this embodiment, two tests share one signal testing device, and because the interfaces required by the two tests are different, two input interfaces, namely, the first input interface 11 and the second input interface 12, are provided, so that a user can conveniently detect signals of the signal receiving circuit board and the signal receiving device.
Optionally, referring to fig. 3, fig. 3 is a block diagram of a third signal testing device according to an embodiment of the present invention, where the signal processing module 2 includes a plurality of photoelectric processing units 21 corresponding to multiple paths of first electrical signals one by one;
the input end of the photoelectric processing unit 21 is electrically connected to the input interface 11, and is used for processing the first electric signal, converting the current signal into a pulse voltage signal, and outputting the pulse voltage signal to the microprocessor.
If the photodiode is set as the optical signal receiver, the electrical signal output by the optical signal receiver is a sinusoidal current signal, and the photoelectric processing unit 21 may convert the sinusoidal current signal into a pulse voltage signal and output the pulse voltage signal to the microprocessor 3 for fault determination.
Referring to fig. 4, fig. 4 is a block diagram of an optoelectronic processing unit according to an embodiment of the present invention, and the optoelectronic processing unit 21 includes: a transimpedance amplifier 211, a filter 212, and an envelope detector 213;
The input end of the transimpedance amplifier 211 is electrically connected with the first input interface 11 through the input end IN1 of the photoelectric processing unit 21, and is used for converting multiple paths of first electrical signals received by the first input interface 11 from current signals into pulse voltage signals; the input end of the filter 212 is electrically connected with the output end of the transimpedance amplifier 211, and the output end is electrically connected with the input end of the envelope detector 213, and is used for filtering noise in the pulse voltage signal; the envelope detector 213 is used to filter out the electrical signal generated by the interfering light source from the pulse voltage signal and output the pulse voltage signal to the microprocessor 3.
The transimpedance amplifier 211 is a circuit structure commonly used in photodetection preamplification, and is used to convert an external current into a voltage. In this embodiment, the transimpedance amplifier 211 converts the first electrical signal received by the first input interface into a pulse voltage signal, and filters noise in the pulse voltage signal by the filter 212, but when the optical signal receiver receives the optical signal, the optical signal receiver is weak in receiving the optical signal, and is easy to receive interference under the light or natural light, and the envelope detector 213 is required to filter the electrical signal generated by the interference light source in the pulse voltage signal, because the pulse frequency of the electrical signal generated by the interference light source is different from the light source generated by the emission source, the envelope detector 213 filters the signal of the interference light source by the difference of the pulse frequency, and the envelope detector 213 outputs the pulse voltage signal after the interference is filtered to the microprocessor 3 through the output terminal OUT1 of the photoelectric processing unit 21.
In addition, referring to fig. 4, optionally, the photoelectric processing unit 21 is externally connected with an adjusting capacitor C4 and an adjusting resistor R7; the input end IN1 is electrically connected with the first input interface 11 through the adjusting capacitor C4, the bias end RBIAS of the photoelectric processing unit 21 is grounded through the adjusting resistor R7, and the amplification factor and the power consumption of the photoelectric processing unit 21 can be adjusted by changing the sizes of the adjusting capacitor C4 and the adjusting resistor R7. Also included within the optoelectronic processing unit 21 is a biasing circuit 214 for providing a suitable static operating point for the optoelectronic processing unit 21.
The photoelectric processing unit 21 further includes a pin analog power supply end AVDD and a digital power supply end DVDD, the analog power supply end AVDD of the photoelectric processing unit 21 is grounded through a capacitor C5 and is connected to a high level through a resistor R8 to form a decoupling circuit for filtering power supply noise, the digital power supply end DVDD of the photoelectric processing unit 21 is grounded through a capacitor C6, and the analog power supply end AVDD and the digital power supply end DVDD are connected in series inside the photoelectric processing unit 21 through a resistor R9 for filtering noise signals of the digital power supply end DVDD. Optionally, referring to fig. 3, the signal processing module 2 includes a plurality of acousto-electric processing units 22 corresponding to the plurality of second electric signals one by one; the input end of the acousto-electric processing unit 22 is electrically connected with the first input interface 11, and is used for outputting the amplified second electric signals to the microprocessor 3 respectively. The second electric signal received by the ultrasonic signal receiver is weak and has more clutter, and the waveform of the second electric signal needs to be analyzed and judged by multistage amplification and filtering processing.
If the piezoelectric ultrasonic sensor is an ultrasonic signal receiver, the electrical signal output by the ultrasonic signal receiver is a pulse-shaped voltage signal, each pulse-shaped voltage signal is composed of a plurality of wave peaks, and the acoustic-electric processing unit 22 can amplify and filter the pulse-shaped voltage signal and output the pulse-shaped voltage signal to the microprocessor 3 for fault judgment.
Alternatively, referring to fig. 5, fig. 5 is a block diagram of an electroacoustic processing unit provided in an embodiment of the present invention, and the electroacoustic processing unit 22 includes multiple stages of amplifiers connected in series, and as illustrated in fig. 5, two stages of amplifiers may be provided, for example; the input end of the first amplifier IN series is electrically connected with the first input interface 11 through the input end IN2 of the acousto-electric processing unit, and the output end of the last amplifier is electrically connected with the microprocessor 3 through the output end OUT2 of the acousto-electric processing unit 22, and each stage of amplifier filters while amplifying the voltage signal. Since the second electrical signal is a pulse-like signal having a positive value and a negative value, and the microprocessor 3 processes only the positive value, a reference voltage VREF is provided at the input terminal of the head amplifier, and the reference voltage VREF is specific to the amplitude of the second electrical signal, as shown IN fig. 5, and the reference voltage VREF raises the voltage value of the second electrical signal inputted from the input terminal IN2 so that the lowest voltage value of the pulse-like signal is a positive value, so that the microprocessor 3 can record and process the entire positive value pulse-like waveform.
It should be noted that, in order to implement two specific embodiments of signal processing, the above-mentioned acousto-electric processing unit and electro-optical processing unit may implement corresponding functions through other electronic devices, and may be implemented in other processing manners, which are not limited in this embodiment.
Optionally, the microprocessor 3 obtains the frequency of each path of the first electrical signal based on the processed multiple paths of first electrical signals, specifically, based on multiple paths of pulse voltage signals, if the difference between the frequency and the set frequency is greater than a first set threshold value, it is determined that an abnormality occurs in an optical signal receiver corresponding to the path of first electrical signal, and a prompt message is sent to the display module 4 for display; the microprocessor 3 is further configured to obtain, based on the processed multiple paths of second electrical signals, specifically, based on the amplified and filtered second electrical signals, an amplitude of a different peak in each pulse-shaped voltage signal of each path of second electrical signals, compare the amplitude with a set amplitude, indicate that an ultrasonic signal receiver corresponding to the path of second electrical signals works normally if the number of peaks exceeding the set amplitude is greater than a threshold value, and not damaged, and determine that the ultrasonic signal receiver corresponding to the path of second electrical signals is abnormal if the number of peaks exceeding the set amplitude is less than the threshold value, and send a prompt message to the display module 4 for display; further, the microprocessor 3 may acquire the graphic data of each path of the second electrical signal based on the processed multiple paths of the second electrical signal, specifically, based on the amplified and filtered second electrical signal, and send the graphic data to the display module 4 for display.
For the optical signal, the microprocessor 3 may directly determine whether the first electrical signal is abnormal by frequency, for example, if the frequency of the optical signal emitted by the emission source is 60Hz, then by determining whether the frequency of the first electrical signal output by the optical signal receiver is 60Hz, it may be determined whether the optical signal receiver corresponding to the first optical signal is abnormal. The signal processing module converts the first optical signal from the current signal into the pulse voltage signal, which can facilitate the microprocessor 3 to acquire the frequency of the first optical signal and judge whether the signal is abnormal. The microprocessor 3 obtains the frequency of each path of first electric signal according to each path of pulse voltage signal, compares the obtained frequency of the first electric signal with the frequency of the laser signal emitted by the emitting source, namely, the set frequency, if the frequencies are the same, the optical signal receiver corresponding to the path of first signal works normally and is not damaged, if the difference value is larger than the set threshold value, namely, the difference value is larger than the error range, the optical signal receiver is judged to be abnormal, and the microprocessor 3 sends prompt information to the display module 4 for display.
For the ultrasonic signal, the microprocessor 3 may directly determine whether the second electrical signal is abnormal through the amplitude, for example, if the frequency of the ultrasonic signal emitted by the emission source is 40kHz, determine whether the ultrasonic signal receiver corresponding to the second ultrasonic signal is abnormal by determining whether the number of peaks reaching the predetermined amplitude in each pulse-shaped second electrical signal output by the ultrasonic signal receiver is greater than a threshold value. The signal processing module amplifies and filters the second ultrasonic signal, so that the microprocessor 3 can conveniently acquire the amplitude of the second ultrasonic signal, and judge whether the signal is abnormal or not. The microprocessor 3 obtains the amplitude of different wave peaks in each pulse-shaped voltage signal of each path of second electric signal according to each path of amplified voltage signal, compares the obtained amplitude of the second electric signal with a set amplitude, if the number of wave peaks exceeding the set amplitude is larger than a threshold value, the ultrasonic signal receiver corresponding to the path of second signal is indicated to work normally and not damaged, if the number of wave peaks exceeding the set amplitude is smaller than the threshold value, the ultrasonic signal receiver is judged to be abnormal, and the microprocessor 3 sends prompt information to the display module 4 for display. The frequency of the ultrasonic waves emitted by the emission source is, for example, 40kHz and is transmitted 60 times per second, i.e. the ultrasonic signal receiver receives 60 pulse voltage signals per second, each pulse voltage signal consisting of an ultrasonic waveform of 40 kHz. Only the amplitude of the peak included in each pulse voltage signal in each path of electric signal is calculated and compared with the set amplitude, and if the number of the peaks exceeding the set amplitude in each pulse voltage signal is smaller than a second set threshold, for example, the second set threshold range is 2000-4000, the range of the values is obtained through multiple measurements and experiments, and in general, the number of the peaks exceeding the set amplitude in each pulse voltage signal with abnormal ultrasonic waves is smaller than the second set threshold range.
However, for the ultrasonic signal, only by calculating the number of peaks exceeding the set amplitude in each pulse-shaped voltage signal, it is judged whether the second electric signal is abnormal or not, which may cause the phenomena of missed judgment and erroneous judgment, so the microprocessor 3 obtains the graphic data of each path of the second electric signal based on the amplified and filtered paths of the second electric signals, and sends the graphic data to the display module 4, and the display module 4 displays the graphic of each path of the second electric signal, so that the user performs fault judgment on the second electric signal according to the graphic, for example, the received second electric signal is not a pulse-shaped voltage wave, or the amplitude of the received second electric signal is abnormal, which all needs to be compared and judged by the user.
Alternatively, referring to fig. 3, the micro-process 3 includes a number acquisition unit 31 and a pattern acquisition unit 32;
the number acquisition unit 31 is configured to count the number of pulses of the first electric signal received in a unit time, and count the number of peaks exceeding a set amplitude in each pulse-like voltage signal in each second electric signal; the graphic acquisition unit 32 is configured to convert each path of the second electrical signal from an analog quantity to a digital quantity, and convert the digital quantity to graphic data.
The microprocessor 3 is configured to process the digital quantity, and if it is desired to obtain a pattern of the pulse-shaped second electric signal composed of a plurality of peaks, the pattern obtaining unit 32 is required to convert the analog quantity of the second electric signal into the digital quantity, specifically, collect the values of the current time points of the received second electric signal at intervals of the same time period, form the values and the value points on the time plane, and sequentially connect all the value points to form the pattern data. The microprocessor 3 then sends the graphic data to the display module 4, and the display module 4 displays a waveform diagram of the second electrical signal according to the graphic data.
Optionally, the display module 4 includes a plurality of display lamps corresponding to the plurality of signal receivers one by one; the display lamp is used for changing the state displayed by the display lamp when receiving the prompt signal of the corresponding signal receiver sent by the microprocessor 3.
Optionally, the display module 4 includes a plurality of display lamps corresponding to the plurality of optical signal receivers and the plurality of ultrasonic signal receivers, where the display lamps are used to change the display states of the display lamps, such as color and on-off of the display lamps, when receiving the prompt signals of the corresponding optical signal receivers and ultrasonic signal receivers sent by the microprocessor;
optionally, the display module 4 may further include at least one display screen, where the display screen is configured to display a waveform chart of each path of the second electrical signal according to the graphic data of the paths of the second electrical signals sent by the microprocessor.
The microprocessor 3 can automatically judge whether the optical signal receiver and the ultrasonic signal receiver are good or not, and prompts the optical signal receiver and the ultrasonic signal receiver through a plurality of display lamps corresponding to the optical signal receivers and the ultrasonic signal receivers one by one, but because the abnormal condition of the ultrasonic signal receiver is complex, besides prompting by using the display lamps, a display screen can be arranged to display waveforms of the second electric signals for the user to judge.
The display lamp may be an LED lamp, and the display lamp may identify a fault through a color change, for example, if the optical signal receiver corresponding to the display lamp has no fault, the display lamp displays green light, and if the optical signal receiver corresponding to the display lamp has a fault, the light emitted by the display lamp is red. The display lamp can also identify faults through the on-off condition, for example, if the display lamp is not on, the fault of the optical signal receiver corresponding to the display lamp is indicated, and if the display lamp is on in the test process, the fault of the optical signal receiver corresponding to the display lamp is indicated.
For example, an LED light model WS2812S may be provided to display a fault. Referring to fig. 6, fig. 6 is a structural diagram of a display lamp according to an embodiment of the present invention, and the structure of the display lamp in fig. 6 is a cascading structure of WS 2812S. WS2812S is an intelligent external control LED light source integrating a control circuit and a light-emitting circuit. The appearance of the LED lamp is the same as that of a 5050LED lamp bead, and each element is a pixel point. The inside of the pixel point comprises an intelligent digital interface data latch signal shaping and amplifying driving circuit, a high-precision internal oscillator and a programmable constant current control part, and the color height consistency of the pixel point light is effectively ensured.
WS2812S includes a data input pin DI and a data output pin DO, a logic power pin VCC for powering the control circuit, and a power pin VDD for the entire LED lamp, while pin VSS is a signal ground and a power ground pin.
Because a plurality of WS2812S are connected in series, each WS2812S can receive data every time the microprocessor 3 transmits hint information. After judging whether all the optical signal receivers are abnormal, the microprocessor 3 packages the abnormal prompt information and the normal prompt information into a data packet, the data packet contains the input information of all the display lamps, the data packet is taken out through the input end DI of the first WS2812S, the first WS2812S takes out the input information related to the first WS2812S in the data packet, the rest data is formed into a data packet again, and the data packet is transmitted to the second WS2812S through the output end DO, and the like, all the WS2812S can receive the prompt information of the corresponding optical signal receiver through the input end DI to change the display color.
The arrangement manner of the plurality of display lamps in the display module 4 is consistent with the arrangement manner of the plurality of optical signal receivers and the plurality of ultrasonic signal receivers on the signal receiving circuit board, and as shown in fig. 7, by way of example, the signal receiving circuit board comprises 3 optical signal receivers 51 and 4 ultrasonic signal receivers 52, the 3 optical signal receivers 51 and 4 ultrasonic signal receivers 52 are arranged in a meter shape on the circuit board, the display module 4 comprises 7 LED display lamps 41,7 LED display lamps 41 which are arranged in a meter shape, each LED display lamp corresponds to one optical signal receiver 51 or one ultrasonic signal receiver 52 one by one, for example, the LED display lamp positioned at the uppermost end of the meter shape on the display module 4 corresponds to the ultrasonic receiver positioned at the uppermost end of the meter shape on the signal receiving circuit board. The one-to-one correspondence is convenient for a tester to intuitively see which optical signal receiver or ultrasonic signal receiver has faults, and the faulty receiver can be checked and replaced.
The display screen is used for displaying the waveform diagram of the second electric signal, and can be a liquid crystal display screen or an organic light emitting display screen, and other display screens capable of displaying waveform curves.
Optionally, the method further comprises: a power module and a reset module; the power supply module is used for providing working voltage for the signal testing device; the reset module is used for zeroing the measurement data to carry out the test again after the test is completed.
Because the signal testing device provided in this embodiment is to provide two tests for the signal receiving circuit and the signal receiving device, and a large number of signal receiving circuits and signal receiving devices need to be tested, after one test is completed, a user triggers a reset module through a reset key to zero the measurement data, and each module is used to perform a test again.
In other embodiments, if the signal receiving circuit of the signal receiving apparatus includes only a plurality of optical signal processors, the signal testing apparatus includes a first input interface, a signal processing module, a microprocessor, and a display module. The first input interface is used for receiving multiple paths of first electric signals output by a plurality of optical signal receivers in the signal receiving circuit; the signal processing module is used for converting the multiple paths of first electric signals into multiple paths of pulse voltage signals; the microprocessor is used for judging and processing based on the multipath pulse voltage signals, determining an abnormal optical signal receiver and sending a prompt signal to the display module for display. The processing of the first electrical signal by the signal processing module, the microprocessor and the display module is as described in the above embodiments.
In other embodiments, if the signal receiving circuit of the signal receiving apparatus includes only a plurality of ultrasonic signal processors, the signal testing apparatus includes a first input interface, a signal processing module, a microprocessor, and a display module. The first input interface is used for receiving multiple paths of second electric signals output by a plurality of ultrasonic signal receivers in the signal receiving circuit; the signal processing module is used for amplifying the plurality of paths of second electric signals; the microprocessor is used for judging and processing based on the multipath amplified second electric signals, determining an abnormal ultrasonic signal receiver and sending a prompt signal to the display module for display. The processing of the second electrical signal by the signal processing module, the microprocessor and the display module is as described in the above embodiments.
Note that the above is only a preferred embodiment of the present invention and the technical principle applied. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, and that various obvious changes, rearrangements, combinations, and substitutions can be made by those skilled in the art without departing from the scope of the invention. Therefore, while the invention has been described in connection with the above embodiments, the invention is not limited to the embodiments, but may be embodied in many other equivalent forms without departing from the spirit or scope of the invention, which is set forth in the following claims.
Claims (9)
1. A signal testing apparatus, comprising: the system comprises a first input interface, a signal processing module, a microprocessor and a display module;
the first input interface is electrically connected to the signal receiving circuit, for receiving multiple paths of electrical signals output by a plurality of signal receivers in a signal receiving circuit;
the first input interface is used for receiving multiple paths of first electric signals output by a plurality of optical signal receivers in the signal receiving circuit and/or multiple paths of second electric signals output by a plurality of ultrasonic signal receivers;
the input end of the signal processing module is electrically connected with the first input interface, and the output end of the signal processing module is electrically connected with the microprocessor and is used for processing the multipath electric signals;
the signal processing module is used for converting the multiple paths of first electric signals into multiple paths of pulse voltage signals and amplifying the multiple paths of second electric signals;
the microprocessor is used for judging and processing based on the processed multipath electric signals, determining an abnormal signal receiver and sending a prompt signal to the display module for display;
the signal testing device also comprises a second input interface;
the second input interface is electrically connected with the output end of the signal receiving device provided with the signal receiving circuit and is used for acquiring the multipath electric signals output by the signal receiving device provided with the signal receiving circuit and transmitting the multipath electric signals to the microprocessor;
The microprocessor is used for judging and processing based on the multipath pulse voltage signals and the multipath amplified second electric signals, determining an abnormal optical signal receiver and/or an abnormal ultrasonic signal receiver, and sending a prompt signal to the display module for display;
the display module comprises a plurality of display lamps which are in one-to-one correspondence with the plurality of optical signal receivers and/or a plurality of display lamps which are in one-to-one correspondence with the plurality of ultrasonic signal receivers;
the display lamp is used for changing the state displayed by the display lamp when receiving the prompting signals of the corresponding optical signal receiver and/or the ultrasonic signal receiver sent by the microprocessor.
2. The signal testing device of claim 1, wherein the signal processing module comprises a plurality of optoelectronic processing units in one-to-one correspondence with the plurality of first electrical signals;
the photoelectric processing unit includes: a transimpedance amplifier, a filter, and an envelope detector;
the input end of the transimpedance amplifier is electrically connected with the first input interface through the input end of the photoelectric processing unit and is used for converting a plurality of paths of first electric signals received by the first input interface from current signals to pulse voltage signals;
The input end of the filter is electrically connected with the output end of the transimpedance amplifier, and the output end of the filter is electrically connected with the input end of the envelope detector and is used for filtering noise in the pulse voltage signal;
the envelope detector is used for filtering the electric signals generated by the interference light source from the pulse voltage signals and outputting the pulse voltage signals to the microprocessor.
3. The signal testing device of claim 1, wherein the signal processing module comprises a plurality of acousto-electric processing units in one-to-one correspondence with the plurality of paths of the second electrical signals;
the input end of the acousto-electric processing unit is electrically connected with the first input interface and is used for amplifying and filtering the second electric signals and outputting the amplified and filtered second electric signals to the microprocessor respectively.
4. The signal testing device of claim 1, wherein:
the microprocessor acquires the frequency of each path of first electric signals based on the multipath pulse voltage signals, if the difference value between the frequency and the set frequency is larger than a first set threshold value, determining that an abnormality occurs in an optical signal receiver corresponding to the path of first electric signals, and sending prompt information to the display module for display;
The microprocessor acquires the amplitude of different wave peaks in each pulse voltage signal of each path of second electric signal based on the multipath amplified second electric signals, compares the amplitude with the set amplitude, determines that an ultrasonic signal receiver corresponding to the path of second electric signal is abnormal if the number of wave peaks exceeding the set amplitude is smaller than a second set threshold value, and sends prompt information to the display module for display.
5. The signal testing device of claim 4, wherein:
and the microprocessor acquires the graphic data of each path of second electric signals based on the second electric signals amplified by the plurality of paths, and sends the graphic data to the display module for display.
6. The signal testing device according to claim 5, wherein the microprocessor includes a number acquisition unit and a pattern acquisition unit;
the number acquisition unit is used for calculating the number of pulses of the first electric signal received in unit time and calculating the number of wave crests exceeding a set amplitude value in each pulse voltage signal in each path of second electric signal;
the graphic acquisition unit is used for converting each path of second electric signals from analog quantity to digital quantity and converting the digital quantity into graphic data.
7. The signal testing device of claim 1, wherein the display module comprises a plurality of display lights in one-to-one correspondence with a plurality of signal receivers;
the display lamp is used for changing the state displayed by the display lamp when receiving the prompt signal of the corresponding signal receiver sent by the microprocessor.
8. The signal testing device of claim 5, wherein the display module comprises at least one display screen;
the display screen is used for displaying the waveform diagram of each path of second electric signal according to the prompt signal sent by the microprocessor.
9. The signal testing device of claim 1 or 7, wherein the relative positional relationship of the plurality of display lamps of the display module is the same as the relative positional relationship of the corresponding plurality of signal receivers on the signal receiving circuit.
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