CN108923249B - Protection module and electronic equipment - Google Patents
Protection module and electronic equipment Download PDFInfo
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- CN108923249B CN108923249B CN201810955613.9A CN201810955613A CN108923249B CN 108923249 B CN108923249 B CN 108923249B CN 201810955613 A CN201810955613 A CN 201810955613A CN 108923249 B CN108923249 B CN 108923249B
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
- H01S5/00—Semiconductor lasers
- H01S5/04—Processes or apparatus for excitation, e.g. pumping, e.g. by electron beams
- H01S5/042—Electrical excitation ; Circuits therefor
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- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B21/00—Alarms responsive to a single specified undesired or abnormal condition and not otherwise provided for
- G08B21/18—Status alarms
- G08B21/185—Electrical failure alarms
Abstract
The invention discloses a protection module and electronic equipment, wherein the protection module is applied to a TOF system, and the TOF system comprises: a laser emission controller and a laser lamp; the protection module includes: the switch unit is connected with the laser emission controller and the laser lamp; the control unit is connected with the laser emission controller and the switch unit; the control unit is used for controlling the switch unit to be switched off when detecting that the duration of the transmitting signal of the laser transmitting controller is greater than a first threshold. The invention can avoid the potential personal safety hazard caused by the fact that the laser is directly irradiated to human eyes or sensitive parts because the laser emission controller is continuously in an emission state; and the problem that the temperature of the laser lamp is too high and the circuit board, the laser lamp and the like are burnt due to continuous high-power emission of the laser lamp can be avoided.
Description
Technical Field
The embodiment of the invention relates to the technical field of electronic products, in particular to a protection module and electronic equipment.
Background
The Time of flight (TOF) method is a method in which laser pulses are continuously transmitted to a target object, light returned from the target object is received by a sensor, the distance of the target object is determined by detecting the Time of flight (round trip) of the laser pulses, and a 3D data image of the target object to be measured is acquired. The TOF system has the advantages of small influence of the environment, high calculation speed, low power consumption and the like, and can be used for aspects such as automatic driving, Virtual Reality (VR for short), telemedicine and the like.
The TOF system uses a laser source of about 850nm as a radiation source, and has a large power of about 2 ten thousand at the time of radiation. In the working process of the TOF system, abnormal conditions can occur to cause that the laser source can be in a transmitting state all the time, and the laser source can cause personal safety hidden danger after being directly irradiated to human eyes or sensitive parts; and the continuous high-power emission of the laser lamp may cause the over-high temperature of the laser lamp and the burning of a circuit board, the laser lamp and the like.
Disclosure of Invention
The embodiment of the invention provides a protection module and electronic equipment, and aims to solve the problem that a laser source in a TOF system in the prior art is possibly in a continuous emission state.
In order to solve the technical problem, the invention is realized as follows:
in a first aspect, an embodiment of the present invention provides a protection module, which is applied to a TOF system, where the TOF system includes: a laser emission controller and a laser lamp;
the protection module includes:
a switch unit connected to the laser emission controller and the laser lamp;
the control unit is connected with the laser emission controller and the switch unit;
the control unit is used for controlling the switch unit to be switched off when detecting that the duration of the transmitting signal of the laser transmitting controller is greater than a first threshold.
In a second aspect, an embodiment of the present invention further provides an electronic device, including: a TOF system and a protection module as described above.
Therefore, in the scheme of the invention, the protection module is used for controlling the laser emission controller to be disconnected with the laser lamp when detecting that the laser emission controller is in an abnormal working state (the laser emission controller is continuously in an emission state), so as to prevent the laser emission controller from continuously emitting signals to the laser lamp, and avoid the situation that the laser emission controller is continuously in the emission state, which causes potential personal safety hazards after the laser directly irradiates to human eyes or sensitive parts; and the problem that the temperature of the laser lamp is too high and the circuit board, the laser lamp and the like are burnt due to continuous high-power emission of the laser lamp can be avoided.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the description of the embodiments of the present invention will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without inventive labor.
FIG. 1 is a block diagram of a protection module according to an embodiment of the present invention;
FIG. 2 is a second block diagram of the protection module according to the embodiment of the present invention;
FIG. 3 is a third block diagram of a protection module according to an embodiment of the present invention;
FIG. 4 is a block diagram of a protection module according to an embodiment of the present invention;
FIG. 5 is a block diagram of a protection module according to an embodiment of the present invention;
FIG. 6 is a schematic diagram of a protection module according to an embodiment of the invention;
fig. 7 shows a working flow chart of the protection module according to the embodiment of the invention.
Detailed Description
Exemplary embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the invention are shown in the drawings, it should be understood that the invention can be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art.
Referring to fig. 1, an embodiment of the present invention provides an example of a protection module. This protection module is applied to the TOF system, the TOF system includes: a laser emission controller 1 and a laser lamp 2.
The protection module includes: a switching unit 3 and a control unit 4.
The switch unit 3 is connected to the laser emission controller 1 and the laser lamp 2; the control unit 4 is connected to the laser emission controller 1 and the switch unit 3.
The control unit 4 is configured to control the switch unit 3 to turn off when detecting that the duration of the transmission signal of the laser emission controller 1 is greater than a first threshold.
Specifically, a first end of the switch unit 3 is connected with a signal output end of the laser emission controller 1, and a second end of the switch unit 3 is connected with a signal input end of the laser lamp 2.
The signal input end of the control unit 4 is connected with the signal output end of the laser emission controller 1, and the signal output end of the control unit 4 is connected with the control end of the switch unit 3.
The laser emission controller 1 (emission source) emits a pulse signal to the laser lamp 2, and the laser lamp 2 is started to continuously send laser pulses to a target object. The laser emission controller 1 emits pulse signals under the normal working state, and the signal emission is stopped after a period of time, so that the emission time is ensured, and the influence on external organisms is avoided.
In this embodiment, the control unit 4 is configured to, when detecting that the laser emission controller 1 is in an abnormal operating state (the laser emission controller 1 is continuously in an emission state, that is, the duration of the emission signal is greater than a first threshold, where the first threshold is greater than the emission duration of the pulse signal in a single period), control the switch unit 3 to turn off, so as to disconnect the laser emission controller 1 from the laser lamp 2, thereby preventing the laser emission controller 1 from continuously emitting the signal to the laser lamp 2, and avoiding that the laser emission controller 1 is continuously in the emission state, which may cause a personal safety hazard after the laser is directly emitted to a human eye or a sensitive part; and can also avoid laser lamp 2 to last high-power transmission and probably cause laser lamp 2 high temperature, burn circuit board, laser lamp 2 etc..
As shown in fig. 2, the embodiment of the present invention further provides another example of a protection module. This protection module is applied to the TOF system, the TOF system includes: a laser emission controller 1 and a laser lamp 2.
The protection module includes: a switching unit 3 and a control unit 4.
The switch unit 3 is connected to the laser emission controller 1 and the laser lamp 2; the control unit 4 is connected to the laser emission controller 1 and the switch unit 3.
The control unit 4 is configured to control the switch unit 3 to turn off when detecting that the duration of the transmission signal of the laser emission controller 1 is greater than a first threshold.
Preferably, the control unit 4 comprises: a signal detection circuit 41 and a logic control circuit 42.
One end of the signal detection circuit 41 is connected with the laser emission controller 1, and the other end is connected with the logic control circuit 42; the other end of the logic control circuit 42 is connected to the switch unit 3.
Wherein, the signal detection circuit 41 is configured to send a first signal to the logic control circuit 42 when detecting that the duration of the transmission signal of the laser emission controller 1 is greater than a first threshold; the logic control circuit 42 is configured to control the switch unit 3 to turn off when receiving the first signal.
Specifically, a first end of the switch unit 3 is connected with a signal output end of the laser emission controller 1, and a second end of the switch unit 3 is connected with a signal input end of the laser lamp 2.
The input end of the signal detection circuit 41 is connected to the signal output end of the laser emission controller 1, and the output end of the signal detection circuit 41 is connected to the first input end of the logic control circuit 42.
A first output of the logic control circuit 42 is connected to a control terminal of the switching unit 3.
In this embodiment, the signal detection circuit 41 obtains the emission signal of the laser emission controller 1, and when detecting that the emission signal exists all the time and is not stopped (for example, greater than 1S), determines that the working state of the laser emission controller 1 is abnormal, and outputs a first signal indicating that the working state of the laser emission controller 1 is abnormal to the logic control circuit 42; when detecting that the emission signal of the laser emission controller 1 is in a pulse type, i.e. the emission is stopped after a period of time, it is determined that the working state of the laser emission controller 1 is normal.
When receiving the first signal sent by the signal detection circuit 41, the logic control circuit 42 sends a turn-off signal to the switch unit 3, so that the switch unit 3 performs a turn-off operation according to the turn-off signal, so as to disconnect the laser emission controller 1 from the laser lamp 2, thereby preventing the laser emission controller 1 from continuously emitting signals to the laser lamp 2, and avoiding the situation that the laser emission controller 1 is continuously in an emission state, which may cause personal safety hazards after the laser is directly emitted to human eyes or sensitive parts; and can also avoid laser lamp 2 to last high-power transmission and probably cause laser lamp 2 high temperature, burn circuit board, laser lamp 2 etc..
As shown in fig. 3, the protection module according to the embodiment of the present invention further includes: a first alarm device 5.
The first alarm device 5 is connected with the control unit 4.
The control unit 4 is further configured to send a first alarm signal to the first alarm device 5 when detecting that the duration of the transmission signal of the laser emission controller 1 is greater than a first threshold.
In particular, the first alarm device 5 is connected to a second output of the logic control circuit 42 in the control unit 4. When the signal detection circuit 41 detects that the duration of the transmission signal of the laser emission controller 1 is greater than the first threshold and sends the first signal to the logic control circuit 42, the logic control circuit 42 may control the switch unit 3 to turn off according to the first signal, and may also send the first alarm signal to the first alarm device 5 according to the first signal.
The following describes an alarm mode of the first alarm device with reference to a specific application scenario:
scene one: the protection module is applied to electronic equipment such as mobile phones and tablet computers.
When the signal detection circuit 41 detects that the duration of the transmission signal of the laser emission controller 1 is greater than the first threshold and sends the first signal to the logic control circuit 42, the logic control circuit 42 may control the switch Unit 3 to turn off according to the first signal, and may also send a first alarm signal to a Central Processing Unit (CPU).
The CPU can send first alarm information to a display screen according to the first alarm signal so that the display screen can display the first alarm information; the alarm prompt can be carried out by adopting a mode of vibrating and/or giving out a preset prompt sound; or the flash lamp can be controlled to continuously flash for a preset time to give an alarm. Of course, the combination of the above reminding manners can also be adopted, and the invention is not limited thereto.
Scene two: the protection module is applied to electronic equipment such as a camera.
As shown in fig. 4, an embodiment of the present invention further provides an example of a protection module, where the protection module is applied to a TOF system, where the TOF system includes: a laser emission controller 1 and a laser lamp 2.
The protection module includes: a switch unit 3, a control unit 4 and a temperature detection unit 6.
The switch unit 3 is connected to the laser emission controller 1 and the laser lamp 2; the control unit 4 is connected to the laser emission controller 1 and the switch unit 3. The control unit 4 is configured to control the switch unit 3 to turn off when detecting that the duration of the transmission signal of the laser emission controller 1 is greater than a first threshold.
Furthermore, the temperature detection unit 6 is connected to the control unit 4. The temperature detection unit 6 is configured to send a second signal to the control unit 4 when detecting that the temperature of the laser lamp 2 is greater than a second threshold; the control unit 4 is further configured to control the switch unit 3 to turn off when detecting that the duration of the transmission signal of the laser emission controller 1 is greater than a first threshold and receiving the second signal.
Specifically, temperature detecting element 6 and laser lamp 2 set up on same circuit board, and temperature detecting element 6 and laser lamp 2's distance is in predetermined range to the accurate temperature that acquires laser lamp 2.
Preferably, the control unit 4 comprises: a signal detection circuit 41 and a logic control circuit 42.
One end of the signal detection circuit 41 is connected with the laser emission controller 1, and the other end is connected with the logic control circuit 42; the other end of the logic control circuit 42 is connected to the switch unit 3. Wherein, the signal detection circuit 41 is configured to send a first signal to the logic control circuit 42 when detecting that the duration of the transmission signal of the laser emission controller 1 is greater than a first threshold; the logic control circuit 42 is configured to control the switch unit 3 to turn off when receiving the first signal.
Furthermore, the output of the temperature detection unit 6 is connected to a second input of the logic control circuit 42. Wherein, the temperature detecting unit 6 is configured to send a second signal to the logic control circuit 42 when detecting that the temperature of the laser lamp 2 is greater than a second threshold; the logic control circuit 42 is further configured to control the switch unit 3 to turn off when receiving the first signal and the second signal.
As shown in fig. 5, the temperature detection unit 6 includes: a temperature acquisition circuit 61 and a comparison circuit 62.
The distance between the temperature acquisition circuit 61 and the laser lamp 2 is within a preset range; the comparison circuit 62 is connected to the temperature acquisition circuit 61 and the control unit 4.
The temperature acquisition circuit 61 is configured to acquire the temperature of the laser lamp 2 and send a temperature signal of the temperature of the laser lamp 2 to the comparison circuit 62; the comparison circuit 62 receives the temperature signal, compares the temperature of the laser lamp 2 with a second threshold, and sends a second signal to the control unit 4 if the temperature of the laser lamp 2 is greater than the second threshold.
Further, the temperature detection unit 6 further includes: a reference circuit 63; the reference circuit 63 is connected to the comparison circuit 62.
The reference circuit 63 is configured to generate a threshold signal including the second threshold, and send the threshold signal to the comparison circuit 62.
Specifically, the temperature acquisition circuit 61 is connected to a first input terminal of the comparison circuit 62, and the reference circuit 63 is connected to a second input terminal of the comparison circuit 62; an output of the comparison circuit 62 is connected to a second input of the logic control circuit 42 of the control unit 4.
The temperature acquisition circuit 61 can detect the temperature of the laser lamp 2 in real time and send a temperature signal containing the temperature of the laser lamp 2 to the first input end of the comparison circuit 62; the comparison circuit 62 compares the temperature of the laser lamp 2 with a second threshold (wherein the setting of the second threshold can be adjusted by the reference circuit 63), determines whether the temperature of the laser lamp 2 exceeds the set second threshold, and sends a signal of the determination result to the logic control circuit 42; when the logic control circuit 42 receives the second signal with the judgment result of yes and receives the first signal sent by the signal detection circuit 41 and the duration of the transmission signal of the laser transmission controller 1 is greater than the first threshold, the logic control circuit sends a turn-off signal to the switch unit 3, so that the switch unit 3 performs a turn-off operation according to the turn-off signal, so that the laser transmission controller 1 is disconnected from the laser lamp 2, the laser transmission controller 1 is prevented from continuously transmitting the signal to the laser lamp 2, and the situation that the laser transmission controller 1 is continuously in a transmission state and the direct laser beam irradiates human eyes or sensitive parts to possibly cause personal safety hazards is avoided; and can also avoid laser lamp 2 to last high-power transmission and probably cause laser lamp 2 high temperature, burn circuit board, laser lamp 2 etc..
In addition, the protection module still include: a second alarm device 7; the second alarm device 7 is connected to the control unit 4.
The control unit 4 is further configured to send a second alarm signal to the second alarm device 7 when receiving the second signal.
In particular, the second alarm device 7 is connected to a third output of the logic control circuit 42 of the control unit 4. When the comparison circuit 62 sends a second signal that the temperature of the laser lamp 2 exceeds the second threshold value to the logic control circuit 42, the logic control circuit 42 may control the switch unit 3 to turn off according to the second signal and the first signal sent by the signal detection circuit 41, and may also send a second alarm signal to the second alarm device 7 according to the second signal.
Wherein the second alarm means 7 may be identical to or different from the first alarm means 5 described above.
The following describes an alarm manner of the second alarm device 7 with reference to a specific application scenario:
scene one: the protection module is applied to electronic equipment such as mobile phones and tablet computers.
When the comparison circuit 62 sends a second signal that the temperature of the laser lamp 2 exceeds the second threshold value to the logic control circuit 42, the logic control circuit 42 may control the switch unit 3 to turn off according to the second signal and the first signal sent by the signal detection circuit 41, and may also send a second alarm signal to the CPU according to the second signal.
The CPU can send second alarm information to a display screen according to the second alarm signal so that the display screen can display the second alarm information; the alarm prompt can be carried out by adopting a mode of vibrating and/or giving out a preset prompt sound; or the flash lamp can be controlled to continuously flash for a preset time to give an alarm. Of course, the combination of the above reminding manners can also be adopted, and the invention is not limited thereto.
Scene two: the protection module is applied to electronic equipment such as a camera.
It should be noted that, the first alarm information and the second alarm information may be alarmed in the same alarm manner, for example: the display screen displays alarm information, flashes a flash lamp (the flashing mode can be different so as to distinguish the first alarm information from the second alarm information), shakes and/or emits a preset prompt sound (the prompt sound can be different and/or the shaking mode is different so as to distinguish the first alarm information from the second alarm information); of course, the alarm prompt of the first alarm information can be performed through one of the above modes, and the alarm prompt of the second alarm information can be performed through the other of the above modes.
Referring to fig. 6, a specific example of a protection module is shown. This protection module is applied to the TOF system, the TOF system includes: a laser emission controller 1 and a laser lamp 2.
The protection module includes: a switch unit 3, a control unit 4 and a temperature detection unit 6. The control unit 4 includes a signal detection circuit 41 and a logic control circuit 42. The temperature detection circuit includes: temperature acquisition circuit 61, comparison circuit 62 and reference circuit 63.
Specifically, the switch unit 3 includes a switch tube 30; the input end of the switch tube 30 is connected with the laser emission controller 1, the output end of the switch tube 30 is connected with the laser lamp 2, and the control end of the switch tube 30 is connected with the control unit 4.
The temperature acquisition circuit 61 comprises a thermistor 610; the thermistor 610 is located within a predetermined distance from the laser lamp 2 and is connected to the comparison circuit 62. The comparison circuit 62 includes a comparator, the thermistor 610 is connected to a first input terminal of the comparator, the reference circuit 63 is connected to a second input terminal of the comparator, and an output terminal of the comparator is connected to the logic control circuit 42.
The working flow of the protection module is described below with reference to fig. 7:
Specifically, the detection of the operation state signal of the laser emission controller 1 is performed by the signal detection circuit 41.
Specifically, when the signal detection circuit 41 detects that no signal is generated in the laser emission controller 1, it determines that the laser emission controller 1 is in a non-operating state, and then executes step 701; when the voltage signal is detected, it is determined that the laser emission controller 1 is in an operating state, and step 703 is executed.
Specifically, when the signal detection circuit 41 detects that the laser signal is always present in the laser emission controller 1 and does not stop (the high voltage exceeds a certain time, for example, greater than 1S), it is determined that the working state of the laser emission controller 1 is an abnormal working state, and step 704 is executed; if the emitting signal of the laser emitting controller 1 is detected to be pulse type, namely, the emitting is stopped after a period of emitting time, the working state of the laser emitting controller 1 is judged to be a normal working state.
Specifically, the temperature of the laser lamp 2 is collected by the temperature collecting circuit 61.
Specifically, the temperature acquisition circuit 61 sends the acquired temperature of the laser lamp 2 to the comparison circuit 62, the comparison circuit 62 compares the temperature of the laser lamp 2 with a second threshold (for example, 80 ℃) generated by the reference circuit 63, and if the temperature of the laser lamp 2 exceeds the second threshold, it is determined that the working state of the laser lamp 2 is abnormal.
Specifically, when the laser emission controller 1 is in an abnormal working state and the temperature of the laser lamp 2 exceeds the second threshold, it is determined that the TOF system is abnormal, and the control unit 4 actively turns off the switch unit 3 to cut off the circuit of the laser lamp 2.
Specifically, when the laser emission controller 1 is in an abnormal working state and the temperature of the laser lamp 2 does not exceed a second threshold, a first alarm signal is sent out to prompt that the TOF circuit is abnormal and needs to be replaced or maintained; when the laser emission controller 1 is in a normal working state and the temperature of the laser lamp 2 exceeds the second threshold, a second alarm signal is sent out to prompt that the temperature of the laser lamp 2 is too high.
In addition, in the initial state, when the laser emission controller 1 is turned on, the switching unit 3 is in a conducting state; when it is detected that the laser emission controller 1 is in a normal operation state and the temperature of the laser lamp 2 does not exceed the second threshold, the switch unit 3 is maintained in a conduction state.
The embodiment of the invention also provides the electronic equipment. The electronic device includes: a TOF system and a protection module as described above.
The electronic device provided in the embodiment of the present invention may include the structure of the protection module in each embodiment in fig. 1 to 6, and is not described herein again to avoid repetition.
According to the electronic equipment, the protection module is used for controlling the laser emission controller to be disconnected with the laser lamp when the laser emission controller is detected to be in an abnormal working state (the laser emission controller is continuously in an emission state), so that the laser emission controller is prevented from continuously emitting signals to the laser lamp, and personal safety hazards caused by the fact that laser is directly emitted to human eyes or sensitive parts due to the fact that the laser emission controller is continuously in the emission state are avoided; and the problem that the temperature of the laser lamp is too high and the circuit board, the laser lamp and the like are burnt due to continuous high-power emission of the laser lamp can be avoided.
The embodiments in the present specification are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other.
While preferred embodiments of the present invention have been described, additional variations and modifications of these 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 embodiments of the invention.
Finally, it should also be noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or electronic device that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or electronic device. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a process, method, article, or electronic device that comprises the element.
While the preferred embodiments of the present invention have been described, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention as defined in the following claims.
Claims (9)
1. A protection module is applied to a TOF system, and the TOF system comprises: the device comprises a laser emission controller (1) and a laser lamp (2); characterized in that, the protection module includes:
a switch unit (3), the switch unit (3) being connected between the laser emission controller (1) and the laser lamp (2);
a control unit (4), said control unit (4) being connected to said laser emission controller (1) and to said switching unit (3);
the temperature detection unit (6), the temperature detection unit (6) is connected with the control unit (4);
the temperature detection unit (6) is used for sending a second signal to the control unit (4) when the temperature of the laser lamp (2) is detected to be greater than a second threshold;
the control unit (4) is used for sending out a first alarm signal when detecting that the duration of the transmitting signal of the laser transmitting controller (1) is greater than a first threshold; when detecting that the duration of the transmitting signal of the laser transmitting controller (1) is greater than a first threshold and receiving the second signal, controlling the switch unit (3) to be switched off so as to disconnect the laser transmitting controller (1) and the laser lamp (2).
2. The protection module according to claim 1, characterized in that said control unit (4) comprises: a signal detection circuit (41) and a logic control circuit (42);
one end of the signal detection circuit (41) is connected with the laser emission controller (1), and the other end of the signal detection circuit is connected with the logic control circuit (42); the other end of the logic control circuit (42) is connected with the switch unit (3);
the signal detection circuit (41) is used for sending a first signal to the logic control circuit (42) when detecting that the duration of the emission signal of the laser emission controller (1) is greater than a first threshold;
the temperature detection unit (6) is used for sending a second signal to the logic control circuit (42) when the temperature of the laser lamp (2) is detected to be greater than the second threshold;
the logic control circuit (42) is used for controlling the switch unit (3) to be switched off when the first signal and the second signal are received.
3. The protection module of claim 1, further comprising: a first alarm device (5);
the first alarm device (5) is connected with the control unit (4);
the control unit (4) is further configured to send a first alarm signal to the first alarm device (5) when detecting that the duration of the transmission signal of the laser emission controller (1) is greater than a first threshold.
4. Protection module according to claim 1, characterized in that said temperature detection unit (6) comprises: a temperature acquisition circuit (61) and a comparison circuit (62);
the distance between the temperature acquisition circuit (61) and the laser lamp (2) is within a preset range; the comparison circuit (62) is connected to the temperature acquisition circuit (61) and the control unit (4);
the temperature acquisition circuit (61) is used for acquiring the temperature of the laser lamp (2) and sending a temperature signal of the temperature of the laser lamp (2) to the comparison circuit (62);
the comparison circuit (62) receives the temperature signal, compares the temperature of the laser lamp (2) with a second threshold, and sends a second signal to the control unit (4) if the temperature of the laser lamp (2) is greater than the second threshold.
5. The protection module according to claim 4, characterized in that said temperature detection unit (6) further comprises: a reference circuit (63);
the reference circuit (63) is connected to the comparison circuit (62);
the reference circuit (63) is configured to generate a threshold signal comprising the second threshold and to send the threshold signal to the comparison circuit (62).
6. The protection module according to claim 4, characterized in that said temperature acquisition circuit (61) comprises a thermistor (610);
the thermistor (610) is in a preset range of distance from the laser lamp (2) and is connected with the comparison circuit (62).
7. The protection module of claim 1, further comprising: a second alarm device (7);
the second alarm device (7) is connected with the control unit (4);
the control unit (4) is further configured to send a second alarm signal to the second alarm device (7) upon receiving the second signal.
8. Protection module according to claim 1, characterized in that said switching unit (3) comprises a switching tube (30);
the input end of the switch tube (30) is connected with the laser emission controller (1), the output end of the switch tube (30) is connected with the laser lamp (2), and the control end of the switch tube (30) is connected with the control unit (4).
9. An electronic device, comprising: a TOF system and a protection module according to any one of claims 1 to 8.
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| CN201810955613.9A CN108923249B (en) | 2018-08-21 | 2018-08-21 | Protection module and electronic equipment |
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| CN201810955613.9A CN108923249B (en) | 2018-08-21 | 2018-08-21 | Protection module and electronic equipment |
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| CN113746064A (en) * | 2021-08-16 | 2021-12-03 | 深圳荆虹科技有限公司 | Overheat protection system for electronic equipment, electronic equipment and control method |
| CN116316046B (en) * | 2023-05-16 | 2023-08-11 | 深圳市飞思卓科技有限公司 | Optical module adjusting system, method, terminal device and computer readable storage medium |
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| CN105425661A (en) * | 2015-11-06 | 2016-03-23 | 厦门市智联信通物联网科技有限公司 | Intelligent drive control method and device for laser positioning lamp, and light supplement lamp controller |
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