CN107371117B - Loudspeaker detection device and method - Google Patents
Loudspeaker detection device and method Download PDFInfo
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- CN107371117B CN107371117B CN201710757305.0A CN201710757305A CN107371117B CN 107371117 B CN107371117 B CN 107371117B CN 201710757305 A CN201710757305 A CN 201710757305A CN 107371117 B CN107371117 B CN 107371117B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R29/00—Monitoring arrangements; Testing arrangements
- H04R29/001—Monitoring arrangements; Testing arrangements for loudspeakers
Abstract
The embodiment of the invention relates to the technical field of loudspeaker detection, in particular to a loudspeaker detection device and method, which comprises the following steps: the system comprises at least four horn interfaces, a detection module and a main control module; the detection module is electrically connected with the horn interface and is used for collecting impedance voltage of each channel; the main control module is electrically connected with the detection module and used for judging whether the impedance voltage of any channel is greater than a first preset voltage or not, and if yes, the two horn interfaces on the channel are determined to be qualified. It can be seen that to two loudspeaker or many loudspeaker, no longer need through the manual short circuit of measuring between two loudspeaker interfaces of universal meter, but gather impedance voltage to when judging impedance voltage on this passageway through host system is greater than first predetermined voltage, can confirm that two loudspeaker interfaces on this passageway are qualified, consequently, to two loudspeaker or many loudspeaker, can be quick detect loudspeaker, thereby can promote the detection efficiency of two loudspeaker interfaces or many loudspeaker interfaces.
Description
Technical Field
The embodiment of the invention relates to the technical field of loudspeaker detection, in particular to a loudspeaker detection device and a loudspeaker detection method.
Background
Whether the horn factory needs to test out the short circuit between the positive negative pole of loudspeaker before loudspeaker shipment, at present, adopt the sweep-frequency meter to single loudspeaker, can test out the short circuit condition of single loudspeaker, because the sweep-frequency meter is single channel output, consequently, the condition that the sweep-frequency meter can only test out single loudspeaker short circuit. For example, for a double-horn or multi-horn short circuit, when the double-horn or multi-horn short circuit is measured by using a universal meter, the universal meter needs to be adjusted to a conduction measuring gear, a probe of the universal meter is put on one peeling head of a terminal, another probe is put on the peeling heads of the other three wires in sequence, the non-conduction is displayed on the universal meter to indicate that the three wires are qualified, the other three wires are measured repeatedly, and the test is required for 6 times in total, so that the short circuit fault of all conditions can be tested, but the manual test times are too many, and the detection efficiency is influenced.
Disclosure of Invention
The embodiment of the invention provides a loudspeaker detection device and method, which are used for improving the detection efficiency of a double-loudspeaker interface or a multi-loudspeaker interface.
The embodiment of the invention provides a loudspeaker detection device, which comprises: the system comprises at least four horn interfaces, a detection module and a main control module;
the detection module is electrically connected with the horn interfaces and used for collecting impedance voltage of each channel, and the channel is formed by closed circuits of any two horn interfaces;
the main control module is electrically connected with the detection module and used for judging whether the impedance voltage of any channel is greater than a first preset voltage or not, and if yes, the two horn interfaces on the channel are determined to be qualified.
Preferably, the detection module includes: the digital logic control unit, the switch unit and the impedance voltage acquisition unit are positioned on each channel;
the digital logic control unit is respectively electrically connected with the main control module and the switch unit, and is used for receiving indication information from the main control module and controlling the working state of the switch unit according to the indication information;
and the impedance voltage acquisition unit on each channel is used for calculating the channel impedance voltage when a corresponding channel forms a passage.
Preferably, the impedance voltage collecting unit includes: a divider resistor and an impedance voltage acquisition port;
one end of the divider resistor is connected with one end of the impedance voltage acquisition port, and the other end of the divider resistor is connected with a public power supply;
one end of the impedance voltage acquisition port is also connected with a horn interface through a switch unit, and the other end of the channel is respectively connected with the ground and the other horn interface;
and each channel shares one impedance voltage acquisition unit.
Preferably, the method further comprises the following steps: the alarm module and the LCD display screen;
the LCD display screen is electrically connected with the main control module and is used for displaying the impedance value corresponding to each channel, and the impedance value is calculated by the main control module according to the impedance voltage of each channel;
the alarm module is electrically connected with the main control module and used for receiving first indication information sent by the main control module and sending alarm prompt information according to the first indication information, wherein the first indication information is generated when the main control module determines that two horn interfaces on any channel are unqualified.
Preferably, the method further comprises the following steps: a power supply module;
the power module is used for supplying power to a power consumption load side, and the power consumption load side comprises at least one of the detection module, the main control module, the alarm module and the LCD display screen.
Preferably, the power supply module includes: the overcurrent protection device comprises a control chip, an overcurrent protection detection unit, a power chip and a power interface;
the power interface is used for being connected with a power supply;
the overcurrent protection detection unit is connected between the power supply chip and the power supply interface and is used for detecting the power supply voltage output by the power supply to the power supply chip;
one end of the power supply chip is connected with the overcurrent protection detection unit, and the other end of the power supply chip is connected with the power load side;
the control chip is connected with the overcurrent protection detection unit and used for disconnecting the power supply from the power chip through the overcurrent protection detection unit when the power supply voltage exceeds a second preset voltage.
Preferably, the over-current protection detecting unit includes: the charging circuit comprises a charging switch, a first resistor, a current monitoring unit and a second resistor;
the charging switch is positioned between the power interface and the first resistor;
the first resistor is positioned between the power supply chip and the charging switch;
the current monitoring unit is connected to two ends of the first resistor, and is used for sensing voltages at two ends of the first resistor and outputting a power supply current to the second resistor according to the sensing voltages;
the second resistor is positioned between the output end of the current monitoring unit and a grounding end;
and a node between the second resistor and the output end of the current monitoring unit is electrically connected with the control chip, and the control chip determines the voltage of the second resistor according to the power supply current and controls the charging switch to be switched on and off according to the voltage of the second resistor.
Preferably, the charging switch comprises a first charging switch and a second charging switch; the power module further comprises a battery unit;
the control chip is connected with the battery unit through the first charging switch and used for supplying power to the power supply chip through the battery unit;
the control chip is also electrically connected with the power supply through the second charging switch and is used for supplying power to the power chip through the power supply.
Preferably, the over-current protection detecting unit further includes: a filtering unit;
the filtering unit is connected with the second resistor in parallel and is used for filtering the power supply current.
The embodiment of the invention also provides a method for detecting the loudspeaker by the loudspeaker detection device provided by the embodiment, which comprises the following steps:
acquiring impedance voltage of each channel;
and judging whether the impedance voltage of any channel is greater than a first preset voltage, and if so, determining that the two horn interfaces on the channel are qualified.
The horn detection device and method provided by the above embodiments include: the system comprises at least four horn interfaces, a detection module and a main control module; the detection module is electrically connected with the horn interfaces and used for collecting impedance voltage of each channel, and the channel is formed by closed circuits of any two horn interfaces; the main control module is electrically connected with the detection module and used for judging whether the impedance voltage of any channel is greater than a first preset voltage or not, and if yes, the two horn interfaces on the channel are determined to be qualified. It can be seen that, to two loudspeaker or many loudspeaker, no longer need through the manual short circuit of measuring between two loudspeaker interfaces of universal meter, but be in detection module and loudspeaker interface electricity connection back, through gathering the impedance voltage of the passageway that is formed by the closed circuit of two arbitrary loudspeaker interfaces, and when judging the impedance voltage on this passageway through host system is greater than first predetermined voltage, can confirm that two loudspeaker interfaces on this passageway are qualified, therefore, to two loudspeaker or many loudspeaker, can be quick detect loudspeaker, thereby can promote the detection efficiency of two loudspeaker interfaces or many loudspeaker interfaces.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings that are required to be used in the description of the embodiments will be briefly described below.
Fig. 1 is a schematic structural diagram of a horn detection device according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a horn detection device according to another embodiment of the present invention;
fig. 3 is a schematic structural diagram of a detection module according to an embodiment of the present invention;
fig. 4 is a schematic structural diagram of a switch unit according to an embodiment of the present invention;
fig. 5 is a schematic structural diagram of a horn detection device according to another embodiment of the present invention;
fig. 6 is a schematic structural diagram of a power module according to an embodiment of the present invention;
fig. 7 is a schematic structural diagram of an overcurrent protection detection unit according to an embodiment of the present invention;
fig. 8 is a schematic structural diagram of a power module according to another embodiment of the present invention;
fig. 9 is a schematic structural diagram of an overcurrent protection detection unit according to another embodiment of the present invention;
fig. 10 is a flowchart illustrating a method for detecting a horn according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more clearly apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Fig. 1 exemplarily shows a schematic structural diagram of a horn detection device according to an embodiment of the present invention, and as shown in fig. 1, the horn detection device 10 may include at least four horn interfaces 1, a detection module 2, and a main control module 3.
And the detection module 2 is electrically connected with the horn interfaces 1 and is used for collecting impedance voltage of each channel, and the channel is formed by closed circuits of any two horn interfaces.
For example, a closed circuit between the horn interfaces L-and L + may form a channel; the closed circuit between L-and R-may form a channel; the closed circuit between L-and R + may form a channel; the closed circuit between L + and R-can form a channel; the closed circuit between L + and R + can form a channel; and the closed circuit between R-and R + may form a channel.
And the main control module 3 is electrically connected with the detection module 2 and is used for judging whether the impedance voltage of any channel is greater than a first preset voltage, if so, determining that the two horn interfaces on the channel are qualified, and otherwise, determining that the two horn interfaces on the channel are unqualified.
The first preset voltage may be based on a voltage value corresponding to the unqualified two horn interfaces on any one channel; the first preset voltage may also be an average value of impedance voltages corresponding to two speaker interfaces on multiple channels that are not qualified.
Based on the horn detection apparatus 10 provided in fig. 1, in order to facilitate checking and to be able to timely determine an impedance value between two horn interfaces on any one channel, the apparatus may further include: an LCD display 4 and an alarm module 5, see fig. 2.
Fig. 2 is a schematic structural diagram of a horn detection device 20 according to another embodiment of the present invention.
For the sake of simplicity of description, the same parts as those in fig. 1 in fig. 2 are not described again, and it can be seen from fig. 2 that the LCD display screen 4 is electrically connected to the main control module 3 for displaying the impedance value corresponding to each channel, which is calculated by the main control module 3 according to the impedance voltage of each channel.
The alarm module 5 is electrically connected with the main control module 3 and is used for receiving first indication information sent by the main control module 3 and sending alarm prompt information according to the first indication information, wherein the first indication information is generated when the main control module 3 confirms that two horn interfaces on any channel are unqualified.
Based on the horn detection device provided in fig. 1 or fig. 2, in order to rapidly collect the impedance voltage of each channel, the detection module 2 may include: a digital logic control unit 21, a switch unit 22 and an impedance voltage acquisition unit 23 located on each channel, see fig. 3.
And the digital logic control unit 23 is electrically connected with the main control module 3 and the switch unit 22 respectively, and is used for receiving control information from the main control module 3 and controlling the working state of the switch unit 22 according to the control information. The impedance voltage acquisition unit 23 on each channel is used for calculating the impedance voltage of the corresponding channel when the channel forms a passage; and each channel shares one impedance voltage collecting unit 23.
The impedance voltage acquisition unit 23 is further configured to send the impedance voltage of the channel to the main control module 3 after calculating the impedance voltage of the channel when the corresponding channel forms a path, the main control module 3 compares the impedance voltage of the channel with a first preset voltage, if the impedance voltage of the channel is greater than the first preset voltage, it is determined that the two horn interfaces on the channel are qualified, and otherwise, it is determined that the two horn interfaces on the channel are not qualified.
In specific implementation, the switch unit 22 may include a plurality of switches, the main control module 3 sends control information to the digital logic control unit 21, and then the digital logic control unit 21 may control the switch unit 22 to be turned on or turned off according to the control information, so that a closed circuit of any two horn interfaces forms a channel.
Referring to fig. 4, the switch unit 22 may include 8 switches, respectively: s1, S2, S3, S4, S5, S6, S7, S8. The impedance voltage collecting unit 23 may include a voltage dividing resistor R1 and an impedance voltage collecting port 230. The impedance voltage collection port 230 may include port 1 and port 2, among others.
As can be seen from fig. 4, one end of the voltage dividing resistor R1 is connected to port 1 of the impedance voltage acquisition port 230, and the other end of the voltage dividing resistor R1 is connected to the common power source Vin. The port 1 of the impedance voltage collecting port 230 may be connected to a horn interface through a switch unit, and the port 2 of the impedance voltage collecting port 230 may be connected to another horn interface through a switch unit, so that any two horn interfaces may form a channel through the switch unit and the port 1 and the port 2 of the impedance voltage collecting port 230.
Specifically, if a closed circuit between the horn interfaces L-and L + is to form a channel, the control message 1 may be sent to the digital logic control unit 21 through the main control module 3, and the content of the control message 1 is: closing S1, S2, opening S3, S4, S5, S6, S7, S8, after the digital logic control unit 21 receives the control message 1, closing S1, S2, and opening S3, S4, S5, S6, S7, S8, at this time, the closed circuit between the speaker interfaces L-and L + may form a channel, and after the closed circuit between the speaker interfaces L-and L + forms a channel, the main control module 3 may calculate the voltage value V1 at the port 1 according to the known values of Vin and R1, that is, the main control module 3 may calculate the impedance voltage V1 between the speaker interfaces L-and L +. After obtaining the impedance voltage V1 between the horn interfaces L-and L +, the main control module 3 compares V1 with a first preset voltage V0, and determines that the horn interfaces L-and L + are qualified horn interfaces if V1 is greater than V0, or determines that the horn interfaces L-and L + are unqualified horn interfaces. The first preset voltage V0 may be based on an impedance voltage corresponding to two unqualified horn interfaces on any one channel; the first preset voltage V0 may also be based on an average value of impedance voltages when two horn interfaces on multiple channels are failed.
It should be noted that, due to the divider resistor R1, when V1 > V0, V1 is still smaller than the common power source Vin, i.e. V0 < V1 < Vin, so that it can be determined that L-and L + are unqualified horn interfaces.
Optionally, after determining that the horn interfaces L-and L + are unqualified horn interfaces, the main control module 3 may further generate an indication message, and send the indication message to the alarm module 5, so that the alarm module 5 sends an alarm prompt message according to the indication message.
Optionally, after the main control module 3 obtains the impedance voltage V1 between the horn interfaces L-and L +, the main control module 3 may also obtain the resistance R between the horn interfaces L-and L + by calculating according to Vin, R1, and V101I.e. the master control module 3 is controlled according to Vin, R1,v1 can calculate the impedance value R between the horn interfaces L-and L +01. And the master control module 3 can also calculate the obtained impedance value R between the horn interfaces L-and L +01And the impedance value is sent to the LCD display screen 4 for display so that a detection person can check the specific impedance value between the horn interfaces L-and L +.
Similarly, if a closed circuit between the speaker interfaces L-and R + is to form a channel, the control message 2 may be sent to the digital logic control unit 21 through the main control module 3, and the content of the control message 2 is: closing S1, S3, S5, opening S2, S4, S6, S7, S8, after the digital logic control unit 21 receives the control message 2, closing S1, S3, S5, and opening S2, S4, S6, S7, S8, at this time, the closed circuit between the speaker interfaces L-and R + may form a channel, and after the closed circuit between the speaker interfaces L-and R + forms a channel, the master control module 3 may calculate the voltage value V2 at the port 1 according to the known values of Vin and R1, that is, the master control module 3 may calculate the impedance voltage V2 between the speaker interfaces L-and L +. After obtaining the impedance voltage V2 between the horn interfaces L-and L +, the main control module 3 compares V2 with a first preset voltage V0, and determines that the horn interfaces L-and R + are qualified horn interfaces if V2 is greater than V0, or determines that the horn interfaces L-and R + are unqualified horn interfaces. The first preset voltage V0 may be based on an impedance voltage corresponding to two unqualified horn interfaces on any one channel; the first preset voltage V0 may also be based on an average value of impedance voltages when two horn interfaces on multiple channels are failed.
It should be noted that, due to the divider resistor R1, when V2 > V0, V2 is still smaller than the common power source Vin, i.e. V0 < V2 < Vin, it can be determined that L-and R + are not qualified horn interfaces.
Optionally, after determining that the horn interfaces L-and R + are unqualified horn interfaces, the main control module 3 may further generate an indication message, and send the indication message to the alarm module 5, so that the alarm module 5 sends an alarm prompt message according to the indication message.
Optionally, the main control module 3 may calculate the impedance voltage V2 between the speaker ports L-and R +Then, the main control module 3 can calculate the resistance value R between the horn interfaces L-and R + according to Vin, R1 and V202That is, the master control module 3 can calculate the impedance value R between the horn interfaces L-and R + according to Vin, R1, V202. And the master control module 3 can also calculate the obtained impedance value R between the loudspeaker interfaces L-and R +02And sent to the LCD display screen 4 for display so that the detection personnel can view the specific impedance value between the horn interfaces L-and R +.
Similarly, if a closed circuit between the speaker interfaces L-and R-forms a channel, the control message 3 may be sent to the digital logic control unit 21 through the main control module 3, and the content of the control message 3 is: closing S1, S4, S8, opening S2, S3, S5, S6, S7, after the digital logic control unit 21 receives the control message 3, closing S1, S4, S8, and opening S2, S3, S5, S6, S7, at this time, the closed circuit between the speaker interfaces L-and R-may form a channel, and after the closed circuit between the speaker interfaces L-and R-forms a channel, the master control module 3 may calculate the voltage value V3 at the port 1 according to the known values of Vin and R1, that is, the master control module 3 may calculate the impedance voltage V3 between the speaker interfaces L-and R-. After obtaining the impedance voltage V3 between the horn interfaces L-and R-, the main control module 3 may compare V3 with a first preset voltage V0, and if V3 is greater than V0, determine that the horn interfaces L-and R-are qualified horn interfaces, otherwise, determine that the horn interfaces L-and R-are unqualified horn interfaces. The first preset voltage V0 may be based on an impedance voltage corresponding to two unqualified horn interfaces on any one channel; the first preset voltage V0 may also be based on an average value of impedance voltages when two horn interfaces on multiple channels are failed.
It should be noted that, due to the divider resistor R1, when V3 > V0, V3 is still smaller than the common power source Vin, i.e. V0 < V3 < Vin, it can be determined that L-and R-are not qualified horn interfaces.
Optionally, after determining that the horn interfaces L-and R-are unqualified horn interfaces, the main control module 3 may further generate an indication message, and send the indication message to the alarm module 5, so that the alarm module 5 sends an alarm prompt message according to the indication message.
Optionally, after the main control module 3 obtains the impedance voltage V3 between the horn interfaces L-and R-through calculation, the main control module 3 may also obtain the resistance value R between the horn interfaces L-and R-through calculation according to Vin, R1, and V303That is, the master control module 3 can calculate the impedance value R between the horn interfaces L-and R-according to Vin, R1 and V303. And the master control module 3 can calculate the impedance value R between the loudspeaker interfaces L-and R-obtained by calculation03Sent to the LCD screen 4 for display so that the test person can view the specific impedance value between the horn interfaces L-and R-.
Similarly, if a closed circuit between the speaker interfaces L + and R + is to form a channel, the control message 4 may be sent to the digital logic control unit 21 through the main control module 3, and the content of the control message 4 is: closing S2, S3, S7, opening S1, S4, S5, S6, S8, after the digital logic control unit 21 receives the control message 4, closing S2, S3, S7, and opening S1, S4, S5, S6, S8, at this time, the closed circuit between the speaker interfaces L + and R + may form a channel, and after the closed circuit between the speaker interfaces L + and R + forms a channel, the main control module 3 may calculate the voltage value V4 at the port 1 according to the known values of Vin and R1, that is, the main control module 3 may calculate the impedance voltage V4 between the speaker interfaces L + and R +. After obtaining the impedance voltage V4 between the horn interfaces L + and R +, the main control module 3 may compare V4 with the first preset voltage V0, and if V4 is greater than V0, determine that the horn interfaces L + and R + are qualified horn interfaces, otherwise, determine that the horn interfaces L + and R + are unqualified horn interfaces. The first preset voltage V0 may be based on an impedance voltage corresponding to two unqualified horn interfaces on any one channel; the first preset voltage V0 may also be based on an average value of impedance voltages when two horn interfaces on multiple channels are failed.
It should be noted that, due to the divider resistor R1, when V4 > V0, V4 is still smaller than the common power Vin, i.e. V0 < V4 < Vin, so that it can be determined that L + and R + are not qualified horn interfaces. Optionally, after determining that the horn interfaces L + and R + are unqualified horn interfaces, the main control module 3 may further generate an indication message, and send the indication message to the alarm module 5, so that the alarm module 5 sends an alarm prompt message according to the indication message.
Optionally, after the main control module 3 obtains the impedance voltage V4 between the horn interfaces L + and R + through calculation, the main control module 3 may also obtain the resistance value R between the horn interfaces L-and R-through calculation according to Vin, R1, and V404That is, the master control module 3 can calculate the impedance value R between the horn interfaces L + and R + according to Vin, R1, V404. And the main control module 3 can also calculate the calculated impedance value R between the horn interfaces L + and R +04And the impedance value is sent to the LCD display screen 4 for display so that a detector can check the specific impedance value between the horn interfaces L + and R +.
Similarly, if a closed circuit between the speaker interfaces L + and R "is to form a channel, the control message 5 may be sent to the digital logic control unit 21 through the main control module 3, and the content of the control message 5 is: closing S2, S4, S6, opening S1, S3, S5, S7, S8, after the digital logic control unit 21 receives the control message 5, closing S2, S4, S6, and opening S1, S3, S5, S7, S8, at this time, the closed circuit between the speaker interfaces L + and R-may form a channel, and after the closed circuit between the speaker interfaces L + and R-forms a channel, the master control module 3 may calculate the voltage value V5 at the port 1 according to the known values of Vin and R1, that is, the master control module 3 may calculate the impedance voltage V5 between the speaker interfaces L + and R-. After obtaining the impedance voltage V5 between the horn interfaces L + and R ", the main control module 3 may compare V5 with a first preset voltage V0, and if V5 is greater than V0, determine that the horn interfaces L + and R" are qualified horn interfaces, otherwise, determine that the horn interfaces L + and R "are unqualified horn interfaces. The first preset voltage V0 may be based on an impedance voltage corresponding to two unqualified horn interfaces on any one channel; the first preset voltage V0 may also be based on an average value of impedance voltages when two horn interfaces on multiple channels are failed.
It should be noted that, due to the divider resistor R1, when V5 > V0, V5 is still smaller than the common power source Vin, i.e. V0 < V5 < Vin, it can be determined that L + and R-are not qualified horn interfaces.
Optionally, after determining that the horn interfaces L + and R + are unqualified horn interfaces, the main control module 3 may further generate an indication message, and send the indication message to the alarm module 5, so that the alarm module 5 sends an alarm prompt message according to the indication message.
Optionally, after the main control module 3 obtains the impedance voltage V5 between the horn interfaces L + and R-through calculation, the main control module 3 may also obtain the resistance value R between the horn interfaces L + and R-through calculation according to Vin, R1, and V505That is, the master control module 3 can calculate the impedance value R between the horn interfaces L + and R-according to Vin, R1 and V505. And the master control module 3 can also calculate the obtained impedance value R between the horn interfaces L + and R-05And the impedance value is sent to the LCD display screen 4 for display so that a detection person can check the specific impedance value between the loudspeaker interfaces L + and R-.
Similarly, if a closed circuit between the horn interfaces R + and R-is to form a channel, the control message 6 may be sent to the digital logic control unit 21 through the main control module 3, and the content of the control message 6 is: s3, S4, S7, S8, S1, S2, S5, S6 are closed, after the digital logic control unit 21 receives the control message 6, S3, S4, S7, S8 are closed, and S1, S2, S5, S6 are opened, at this time, a closed circuit between the speaker interfaces R + and R-may form a channel, and after the closed circuit between the speaker interfaces R + and R-forms a channel, the main control module 3 may calculate the voltage value V6 at the port 1 according to the known values of Vin and R1, that is, the main control module 3 may calculate the impedance voltage V6 between the speaker interfaces R + and R-. After obtaining the impedance voltage V6 between the horn interfaces R + and R ", the main control module 3 may compare V6 with a first preset voltage V0, and if V6 is greater than V0, determine that the horn interfaces R + and R" are qualified horn interfaces, otherwise, determine that the horn interfaces R + and R "are unqualified horn interfaces. The first preset voltage V0 may be based on an impedance voltage corresponding to two unqualified horn interfaces on any one channel; the first preset voltage V0 may also be based on an average value of impedance voltages when two horn interfaces on multiple channels are failed.
It should be noted that, due to the divider resistor R1, when V6 > V0, V6 is still smaller than the common power source Vin, i.e. V0 < V6 < Vin, so it can be determined that R + and R-are not qualified horn interfaces.
Optionally, after determining that the horn interfaces R + and R-are unqualified horn interfaces, the main control module 3 may further generate an indication message, and send the indication message to the alarm module 5, so that the alarm module 5 sends an alarm prompt message according to the indication message.
Optionally, after the main control module 3 obtains the impedance voltage V5 between the horn interfaces R + and R-through calculation, the main control module 3 may also obtain the resistance value R between the horn interfaces R + and R-through calculation according to Vin, R1, and V506That is, the master control module 3 can calculate the impedance value R between the horn interfaces R + and R-according to Vin, R1 and V606. And the master control module 3 can also calculate the obtained impedance value R between the horn interface R + and the horn interface R-06And the impedance value is sent to the LCD display screen 4 for display so that a detection person can check the specific impedance value between the horn interfaces R + and R-.
It can be seen that different control information is sent to the digital logic control unit through the main control module, the on and off of different pins of the double loudspeakers can be achieved, accordingly, two-two detection of the double loudspeakers is achieved, different circuits do not need to be built for detection, the complexity of the circuit can be reduced, and the production cost can be reduced.
In addition, in order to prevent the main control module from being damaged due to static electricity generated between the circuits inside the switch unit, a TVS (Voltage regulator diode) may be connected between the speaker interface and the switch to prevent the static electricity from being generated between the circuits inside the switch unit. For example, TVS voltage regulators can be connected between the L-and the switch S1, between the L + and the switch S2, between the R-and the switch S3, and between the R + and the switch S4 to prevent the transmission damage of the main control module caused by static electricity generated between circuits inside the switch unit. Based on the horn detection device 20 provided in fig. 2, the method may further include: power supply module 6, see fig. 5.
Fig. 5 is a schematic structural diagram of a horn detecting device 30 according to another embodiment of the present invention.
For the sake of simplicity of description, the same portions as those in fig. 2 in fig. 5 will not be described, and as can be seen from fig. 5, the power supply module 6 is used to supply power to the electric load side including at least one of the detection module 2, the main control module 3, the LCD display screen 4, and the alarm module 5.
In order to be able to protect the power supply module, the power supply module 6 may comprise: a power interface 61, a control chip 62, an overcurrent protection detection unit 63 and a power chip 64, see fig. 6.
The power interface 61 is used for connecting with a power supply; the overcurrent protection detection unit 63 is connected between the power interface 61 and the power chip 64 and is used for detecting the power supply voltage output by the power supply to the power chip 64; one end of the power supply chip 64 is connected to the overcurrent protection detection unit 63, and the other end is connected to the power load. For example, the other end of the power supply chip 64 may be connected to a common power source Vin in the impedance voltage collecting unit to supply the common power source to the impedance voltage collecting unit. In addition, the other end of the power supply chip 64 can be connected to the detection module 2, the main control module 3, the LCD display screen 4 and the alarm module 5.
And the control chip 62 is respectively connected with the power interface 61 and the overcurrent protection detection unit 63, and is used for disconnecting the power supply from the power chip 64 through the overcurrent protection detection unit 63 when the power supply voltage exceeds a second preset voltage. The second preset voltage may be a maximum power supply voltage that the power module 6 can carry.
Preferably, the overcurrent protection detecting unit 63 may include: a charging switch 631, a first resistor 632, a current monitoring unit 633, and a second resistor 634, see fig. 7.
As shown in fig. 7, the first resistor 632 may be an over-current detection resistor Rsense, and the second resistor Rout. A charging switch 631 located between the power interface 61 and the first resistor 632; a first resistor 632 located between the power chip 64 and the charging switch 631; the current monitoring unit 633 is connected to two ends of the first resistor 632, and is configured to sense a sensing voltage at two ends of the first resistor 632 and output a supply current Iout to the second resistor according to the sensing voltage; the second resistor 634, a node at the output end of the current monitor unit 633 is electrically connected to the control chip, the control chip 62 can determine the voltage Vout of the second resistor according to the supply current Iout, and control the charging switch 631 to open and close according to the voltage Vout of the second resistor.
Specifically, when the control chip 62 detects that the voltage Vout of the second resistor Rout is greater than the second preset voltage, the charging switch 631 may be controlled to be turned off, so as to stop supplying power to the power supply chip, thereby protecting the power supply module 6.
Preferably, the charging switch 631 may further include a first charging switch 6310 and a second charging switch 6311, and the power module 6 may further include a battery unit 65, see fig. 8.
As shown in fig. 8, the control chip 62 is connected to the battery unit 65 through a first charging switch 6310 for supplying power to the power supply chip 64 through the battery unit 65;
the control chip 62 is also connected to an external power supply through a second charging switch 6311 for supplying power to the power chip 64 through the external power supply.
In specific implementation, the power interface 61 may be a USB (Universal Serial Bus) interface, and when an external power supply is connected to the power module 6 through the USB and the control chip 62 controls the second charging switch 6311 to be closed, the power chip 64 may be charged through the external power supply; when the external power supply is not connected to the power module 6, the control chip 62 may control the first charging switch 6310 to be turned on, and at this time, the battery unit 62 may charge the power chip 64.
In addition, when the control chip 62 detects that the voltage Vout of the second resistor is greater than the second preset voltage, the control chip 64 may control the first charging switch 6310 and the second charging switch 6311 to protect the power module 6.
Optionally, in order to enable the control chip 62 to accurately detect the voltage Vout of the second resistor, the over-current protection detection unit may further include a filtering unit 635, see fig. 9.
As can be seen from fig. 9, the filtering unit 635 is connected in parallel with the second resistor 634 for filtering the supply current.
According to the above, it can be seen that, for double-horn or multi-horn, whether a short circuit exists between two horn interfaces is not needed to be manually measured through a multimeter, but after the detection module is electrically connected with the horn interfaces, the impedance voltage of a channel formed by closed circuits of any two horn interfaces is collected, and when the impedance voltage on the channel is judged to be greater than a first preset voltage through the main control module, it can be determined that the two horn interfaces on the channel are qualified, therefore, for double-horn or multi-horn, the detection for the horn can be quickly performed, and therefore the detection efficiency of the double-horn interface or the multi-horn interface can be improved. In addition, the overcurrent protection detection unit is arranged in the power supply module, so that the power supply module can be protected.
Based on the same technical concept, an embodiment of the present invention further provides a method for detecting a horn, as shown in fig. 10, the method may include:
s101, collecting impedance voltage of each channel, wherein the channel is formed by closed circuits of any two horn interfaces.
S102, judging whether any channel impedance voltage is larger than a first preset voltage, if so, turning to the step S103, otherwise, turning to the step S104.
S103, determining that the two horn interfaces on the channel are qualified.
And S104, determining that the two horn interfaces on the channel are unqualified.
To sum up, the device and method for detecting a horn provided by the embodiment of the present invention includes: the system comprises at least four horn interfaces, a detection module and a main control module; the detection module is electrically connected with the horn interfaces and used for collecting impedance voltage of each channel, and the channel is formed by closed circuits of any two horn interfaces; the main control module is electrically connected with the detection module and used for judging whether the impedance voltage of any channel is greater than a first preset voltage or not, and if yes, the two horn interfaces on the channel are determined to be qualified. It can be seen that, to two loudspeaker or many loudspeaker, no longer need through the manual short circuit of measuring between two loudspeaker interfaces of universal meter, but be in detection module and loudspeaker interface electricity connection back, through gathering the impedance voltage of the passageway that is formed by the closed circuit of two arbitrary loudspeaker interfaces, and when judging the impedance voltage on this passageway through host system is greater than first predetermined voltage, can confirm that two loudspeaker interfaces on this passageway are qualified, therefore, to two loudspeaker or many loudspeaker, can be quick detect loudspeaker, thereby can promote the detection efficiency of two loudspeaker interfaces or many loudspeaker interfaces.
While preferred embodiments of the present invention have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. Therefore, it is intended that the appended claims be interpreted as including preferred embodiments and all such alterations and modifications as fall within the scope of the invention.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.
Claims (8)
1. A horn detection apparatus, comprising: the device comprises at least four horn interfaces, a detection module, a main control module and a power supply module;
the detection module is electrically connected with the horn interfaces and used for collecting impedance voltage of each channel, and the channel is formed by closed circuits of any two horn interfaces;
the detection module comprises: the digital logic control unit, the switch unit and the impedance voltage acquisition unit are positioned on each channel; the digital logic control unit is respectively electrically connected with the main control module and the switch unit, and is used for receiving control information from the main control module and controlling the working state of the switch unit according to the control information; the impedance voltage acquisition unit on each channel is used for calculating the impedance voltage of the channel when a corresponding channel forms a passage; each channel shares one impedance voltage acquisition unit;
the main control module is electrically connected with the detection module and is used for judging whether the impedance voltage of any channel is greater than a first preset voltage or not, and if yes, determining that the two horn interfaces on the channel are qualified;
the power supply module comprises a control chip, an overcurrent protection detection unit, a power supply chip and a power supply interface;
the power interface is used for being connected with a power supply;
the overcurrent protection detection unit is connected between the power supply chip and the power supply interface and is used for detecting the power supply voltage output by the power supply to the power supply chip;
one end of the power supply chip is connected with the overcurrent protection detection unit, and the other end of the power supply chip is connected with an electric load;
the control chip is connected with the overcurrent protection detection unit and used for disconnecting the power supply from the power chip through the overcurrent protection detection unit when the power supply voltage exceeds a second preset voltage.
2. The apparatus of claim 1, wherein the impedance voltage acquisition unit comprises: a divider resistor and an impedance voltage acquisition port;
one end of the divider resistor is connected with one end of the impedance voltage acquisition port, and the other end of the divider resistor is connected with a public power supply;
one end of the impedance voltage acquisition port is further connected with a horn interface through a switch unit, and the other end of the channel is respectively connected with the ground and the other horn interface.
3. The apparatus of claim 1, further comprising: the alarm module and the LCD display screen;
the LCD display screen is electrically connected with the main control module and is used for displaying the impedance value corresponding to each channel, and the impedance value is calculated by the main control module according to the impedance voltage of each channel;
the alarm module is electrically connected with the main control module and used for receiving first indication information sent by the main control module and sending alarm prompt information according to the first indication information, wherein the first indication information is generated when the main control module determines that two horn interfaces on any channel are unqualified.
4. The apparatus of claim 3, further comprising: a power supply module;
the power module is used for supplying power to a power consumption load side, and the power consumption load side comprises at least one of the detection module, the main control module, the alarm module and the LCD display screen.
5. The apparatus of claim 4, wherein the over-current protection detection unit comprises: the charging circuit comprises a charging switch, a first resistor, a current monitoring unit and a second resistor;
the charging switch is positioned between the power interface and the first resistor;
the first resistor is positioned between the power supply chip and the charging switch;
the current monitoring unit is connected to two ends of the first resistor, and is used for sensing voltages at two ends of the first resistor and outputting a power supply current to the second resistor according to the sensing voltages;
the second resistor is positioned between the output end of the current monitoring unit and a grounding end;
and a node between the second resistor and the output end of the current monitoring unit is electrically connected with the control chip, and the control chip determines the voltage of the second resistor according to the power supply current and controls the charging switch to be switched on and off according to the voltage of the second resistor.
6. The apparatus of claim 5, wherein the charge switch comprises a first charge switch and a second charge switch; the power module further comprises a battery unit;
the control chip is connected with the battery unit through the first charging switch and used for supplying power to the power supply chip through the battery unit;
the control chip is also electrically connected with the power supply through the second charging switch and is used for supplying power to the power chip through the power supply.
7. The apparatus of claim 6, wherein the over-current protection detection unit further comprises: a filtering unit;
the filtering unit is connected with the second resistor in parallel and is used for filtering the power supply current.
8. A method of detecting a horn, comprising:
receiving control information and controlling the working state of a switch unit on each channel according to the control information; calculating the channel impedance voltage through an impedance voltage acquisition unit on each channel when the channel forms a path; each channel shares one impedance voltage acquisition unit; acquiring impedance voltage of each channel, wherein the channel is formed by closed circuits of any two horn interfaces;
judging whether the impedance voltage of any channel is greater than a first preset voltage, if so, determining that two horn interfaces on the channel are qualified;
detecting the power supply voltage output by a power supply to a power supply chip; and when the power supply voltage exceeds a second preset voltage, disconnecting the power supply from the power supply chip.
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| CN201710757305.0A CN107371117B (en) | 2017-08-29 | 2017-08-29 | Loudspeaker detection device and method |
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| CN106998523B (en) * | 2017-04-24 | 2022-10-25 | 恒业世纪安全技术有限公司 | Circuit and detection device for detecting online number of loudspeakers in two-line real-time manner |
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