CN212646819U

CN212646819U - Video camera

Info

Publication number: CN212646819U
Application number: CN202020554754.2U
Authority: CN
Inventors: 尹占营; 高平晓
Original assignee: Zhejiang Uniview Technologies Co Ltd
Current assignee: Zhejiang Uniview Technologies Co Ltd
Priority date: 2020-04-15
Filing date: 2020-04-15
Publication date: 2021-03-02
Anticipated expiration: 2030-04-15

Abstract

The embodiment of the utility model discloses camera, wherein, camera includes electric field strength detection circuitry, electric field strength detection circuitry is used for detecting the electric field strength of camera position department, and then detect whether the mounted position of camera is suitable, realizes the instruction to camera mounted position. The electric field intensity of the position where the camera is located is detected through the electric field intensity detection circuit, whether the camera is located in a strong electromagnetic radiation area or not is confirmed, then the installation position of the camera is determined, the interference of electromagnetic radiation to the camera is reduced, and the normal use of the camera is guaranteed.

Description

Video camera

Technical Field

The embodiment of the utility model provides a relate to communication technology field, especially relate to a camera.

Background

In some special occasions, such as a television signal transmitting tower, a communication signal transmitting tower and an airport radar irradiation area, the places are generally higher or have wider visual fields, and the device is suitable to be used as a monitoring point for installing camera equipment such as a ball machine holder and the like. However, strong electromagnetic radiation fields exist in these places, and normal use of the equipment is affected by the phenomena of screen flashing, snowflake screen, black screen and the like occasionally caused by strong electromagnetic radiation interference when a general camera is installed and used in the above areas.

In addition, the electromagnetic field near the antenna is not uniform, and there is a case of "dark under the lamp", that is, the electromagnetic radiation field intensity is weak under the antenna tower, or on the back and side of the radar. However, the distribution of the field intensity is not fixed and varies with the form of the antenna, and the installation position cannot be determined by visual observation. Therefore, how to determine the "under-lamp black" area and determine the installation position of the camera is an urgent problem to be solved in the prior art.

SUMMERY OF THE UTILITY MODEL

In view of this, the embodiment of the utility model provides a camera detects electric field strength through electric field strength detection circuit, guides camera mounted position.

The embodiment of the utility model provides a camera, including electric field strength detection circuitry, electric field strength detection circuitry is used for detecting the electric field strength of camera position department, in order to guide the mounted position of camera.

Optionally, the electric field strength detection circuit includes a signal receiving module, a signal amplifying module, a signal processing module and an alarm module;

the signal receiving module comprises an electromagnetic wave signal receiving end and an induced voltage signal output end, the signal amplifying module comprises an induced voltage signal receiving end and an amplified signal output end, the signal processing module comprises an amplified signal receiving end and a processed signal output end, and the alarm module comprises a processed signal receiving end;

the induction voltage signal output end is electrically connected with the induction voltage signal receiving end, the amplification signal output end is electrically connected with the amplification signal receiving end, and the processing signal output end is electrically connected with the processing signal receiving end.

Optionally, the signal amplification module includes a power supply, a gain adjustment resistor, and at least one stage of signal amplification unit, where the signal amplification unit includes an amplification transistor and a first resistor;

a first end of the first resistor is electrically connected with the power supply, and a second end of the first resistor is connected with an input end of the amplifying transistor;

the control end of the amplifying transistor is the induced voltage signal receiving end and is electrically connected with the induced voltage signal output end, or the control end of the amplifying transistor is electrically connected with the output end of the amplifying transistor in the previous-stage signal amplifying unit; the output end of the amplifying transistor is the amplifying signal output end and is connected with the amplifying signal receiving end, or the output end of the amplifying transistor is electrically connected with the control end of the amplifying transistor in the next-stage signal amplifying unit;

the first end of the gain adjusting resistor is electrically connected with the amplified signal output end, and the second end of the gain adjusting resistor is grounded.

Optionally, the signal amplification module includes an operational amplifier, a second resistor, a third resistor, and a fourth resistor;

a first end of the second resistor is electrically connected with the induced voltage signal output end, and a second end of the second resistor is electrically connected with the inverting input end of the operational amplifier; the first end of the third resistor is electrically connected with the positive phase input end of the operational amplifier, and the second end of the third resistor is grounded; a first end of the fourth resistor is electrically connected with the output end of the operational amplifier, and a second end of the fourth resistor is electrically connected with the inverting input end of the operational amplifier;

the inverting input end of the operational amplifier is the induced voltage signal receiving end, and the output end of the operational amplifier is the amplified signal output end.

Optionally, the signal processing module includes a comparator;

the positive phase input end of the comparator is the amplified signal receiving end, the negative phase input end of the comparator is connected with a reference level signal, and the output end of the comparator is the processed signal output end;

the reference level signal is a level signal corresponding to the maximum electromagnetic radiation bearable by the camera.

Optionally, the alarm module includes an alarm display unit and/or a remote alarm unit;

the alarm display unit comprises the processing signal receiving end, and/or the remote alarm unit comprises the processing signal receiving end.

Optionally, the alarm display unit includes a first status indicator light, a second status indicator light, and an inverter;

the first end of the first status indicator lamp is electrically connected with the processing signal output end, and the second end of the first status indicator lamp is grounded;

the first end of the phase inverter is electrically connected with the processing signal output end, the second end of the phase inverter is electrically connected with the first end of the second state indicator lamp, and the second end of the second state indicator lamp is grounded;

the first end of the first state indicator light and the first end of the phase inverter are the processing signal receiving ends.

Optionally, the alarm display unit further includes a fifth resistor and a sixth resistor;

a first end of the fifth resistor is electrically connected with a second end of the first status indicator lamp, and a second end of the fifth resistor is grounded;

the first end of the sixth resistor is electrically connected with the second end of the second status indicator lamp, and the second end of the sixth resistor is grounded.

Optionally, the remote alarm unit includes the processing signal receiving terminal and a remote alarm signal output terminal, and the remote alarm signal output terminal is in communication connection with a remote network terminal.

Optionally, the signal receiving module includes a full-band signal receiving antenna.

The embodiment of the utility model provides a camera, including electric field strength detection circuitry, electric field strength detection circuitry is used for detecting the electric field strength of camera position department, when the electric field strength of camera position department is less than preset electric field strength, shows that the camera mounted position is reasonable; when the electric field intensity at the position where the camera is located is larger than or equal to the preset electric field intensity, the fact that the installation position of the camera is unreasonable is indicated, and then the installation position of the camera is prompted to be replaced. The electric field intensity detection circuit is arranged in the camera, and the guidance of the installation position of the camera is realized through the electric field intensity detection electrode, so that the installation position of the camera is ensured to be proper, the interference of electromagnetic radiation to the camera is reduced or eliminated, and the normal use of the camera is ensured.

Drawings

Other features, objects and advantages of the invention will become more apparent upon reading of the detailed description of non-limiting embodiments made with reference to the following drawings:

fig. 1 is a schematic diagram of a module structure of a camera according to an embodiment of the present invention;

fig. 2 is a schematic diagram of a module structure of an electric field strength detection circuit according to an embodiment of the present invention;

fig. 3 is a schematic circuit diagram of an electric field strength detection circuit according to an embodiment of the present invention;

fig. 4 is a schematic circuit diagram of another electric field strength detection circuit according to an embodiment of the present invention.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention clearer, the technical solutions of the present invention will be described in detail through the following embodiments with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are some embodiments of the present invention, not all embodiments, and all other embodiments obtained by those skilled in the art without creative efforts based on the embodiments of the present invention all fall into the protection scope of the present invention.

Fig. 1 is a schematic diagram of a module structure of a camera provided by an embodiment of the present invention, as shown in fig. 1, a camera 100 provided by an embodiment of the present invention includes an electric field strength detection circuit 10, and further includes a camera module 20. The electric field strength detection circuit 10 is used to detect the electric field strength at the position where the video camera 100 is located to guide the installation position of the video camera 100.

For example, the electric field strength detection circuit 10 may perform electric field strength detection for any mounting position of the video camera 100 to guide the mounting position of the video camera 100. When the electric field intensity detection circuit 10 detects that the electric field intensity at the position where the camera 100 is located is less than the preset electric field intensity, it indicates that the installation position of the camera 100 is reasonable; when the electric field intensity detection circuit 10 detects that the electric field intensity at the position where the video camera 100 is located is greater than or equal to the preset electric field intensity, it indicates that the installation position of the video camera 100 is not reasonable, and further prompts to replace the installation position of the video camera 100. The preset electric field strength may be an electric field strength corresponding to the strong electromagnetic radiation.

Optionally, the camera module 20 may include a package housing, a plurality of lenses, a motor, etc., and the embodiment of the present invention is not repeated here. The camera module 20 can take a picture based on the installation position of the camera to obtain the environmental information at the current installation position.

To sum up, the embodiment of the present invention provides a camera, which includes an electric field strength detection circuit, the electric field strength detection circuit is used for detecting the electric field strength at the position of the camera, when the electric field strength at the position of the camera is less than the preset electric field strength, the installation position of the camera is reasonable; when the electric field intensity at the position where the camera is located is larger than or equal to the preset electric field intensity, the fact that the installation position of the camera is unreasonable is indicated, and then the installation position of the camera is prompted to be replaced. The electric field intensity detection circuit is arranged in the camera, and the guidance of the installation position of the camera is realized through the electric field intensity detection electrode, so that the installation position of the camera is ensured to be proper, the interference of electromagnetic radiation to the camera is reduced or eliminated, and the normal use of the camera is ensured.

Fig. 2 is a schematic diagram of a module structure of an electric field strength detection circuit provided in an embodiment of the present invention, as shown in fig. 2, an electric field strength detection circuit 10 provided in an embodiment of the present invention includes a signal receiving module 11, a signal amplifying module 12, a signal processing module 13, and an alarm module 14; the signal receiving module 11 comprises an electromagnetic wave signal receiving end 11a and an induced voltage signal output end 11b, the signal amplifying module 12 comprises an induced voltage signal receiving end 12a and an amplified signal output end 12b, the signal processing module 13 comprises an amplified signal receiving end 13a and a processed signal output end 13b, and the alarm module 14 comprises a processed signal receiving end 14 a; the induced voltage signal output terminal 11b is electrically connected to the induced voltage signal receiving terminal 12a, the amplified signal output terminal 12b is electrically connected to the amplified signal receiving terminal 13a, and the processed signal output terminal 13b is electrically connected to the processed signal receiving terminal 14 a.

Before explaining the technical solution of the electric field strength detection circuit in the embodiment of the present invention in detail, it is first right that the embodiment of the present invention provides a principle that the electric field strength detection circuit 10 detects the electromagnetic radiation at the position of the camera.

The concept of the strong electromagnetic radiation region is explained first.

A region of strong electromagnetic radiation refers to a region of electric field strength greater than the radiation intensity that the device can withstand. Such as a radiation region with a field strength greater than the level 4(30V/m) specified in GB/T17626.3 radio frequency electromagnetic field radiation immunity test.

The operation principle of the electric field strength detection circuit 10 will be explained next.

The signal receiving module 11 receives the electromagnetic waves in the space, the signal receiving module 11 may be an antenna, and according to IEEE, the antenna coefficient AF satisfies AF (E is the field strength, V is the induced electromotive force), and the induced electromotive force V at the two ends of the antenna can be obtained as E/AF. Therefore, the electric field intensity at the position of the camera is converted into a voltage value which is easy to process, and then the weak voltage sensed by the antenna is amplified to a range which can be processed by the signal processing module 13 through the high-gain signal amplifying circuit 12 and then is sent to the signal processing module 13. According to the antenna coefficient and the gain of the signal amplifying circuit 12, we can obtain a corresponding table of the field strength and the voltage value. Meanwhile, according to the definition of the strong electromagnetic radiation area, a voltage value A corresponding to the strong electromagnetic radiation area can be obtained through conversion and is used as a reference level. If the field induced voltage value B is smaller than the voltage value A, the installation condition is considered to be met, otherwise, the installation condition is not met. Therefore, the field intensity can be judged by monitoring the induction voltage value of the installation point in real time, and whether the field intensity meets the installation condition of the equipment is judged.

Based on the above principle explanation, the embodiment of the utility model provides a through at the inside electric field strength detection circuitry that increases of camera, when the electric field strength of camera position department is greater than the electric field strength that the camera can bear, electric field strength detection circuitry sends alarm signal, and the mounted position is changed in the suggestion, realizes the instruction to camera mounted position.

As shown in fig. 2, an electric field strength detection circuit 10 provided by the embodiment of the present invention includes a signal receiving module 11, a signal amplifying module 12, a signal processing module 13, and an alarm module 14. The signal receiving module 11 may be a signal receiving antenna, the signal receiving module 11 includes an electromagnetic wave signal receiving end 11a and an induced voltage signal output end 11b, the electromagnetic wave signal receiving end 11a is configured to receive an electromagnetic wave signal at a position where the camera is located, induced electromotive forces at two ends of the signal receiving antenna may be obtained based on the electromagnetic wave signal, and the induced electromotive forces are output from the signal receiving antenna through the induced voltage signal output end 11 b. The signal amplification module 12 includes an induced voltage signal receiving terminal 12a and an amplified signal output terminal 12b, the induced voltage signal receiving terminal 12a is electrically connected to the induced voltage signal output terminal 11b, the induced voltage signal receiving terminal 12a receives an induced voltage signal output from the induced voltage signal output terminal 11b, and the signal amplification module 12 amplifies the received induced voltage signal and outputs the amplified induced voltage signal from the amplified signal output terminal 12 b. The signal processing module 13 includes an amplified signal receiving terminal 13a and a processed signal output terminal 13b, the amplified signal receiving terminal 13a is electrically connected to the amplified signal output terminal 12b, and the amplified signal receiving terminal 13a receives the amplified induced voltage signal output from the amplified signal output terminal 12b, processes the amplified induced voltage signal, and outputs the processed induced voltage signal from the processed signal output terminal 13 b. The alarm module 14 includes a processing signal receiving terminal 14a, the processing signal receiving terminal 14a is electrically connected to the processing signal output terminal 13b, and the processing signal receiving terminal 14a receives the processing signal output from the processing signal output terminal 13b and performs an alarm or does not perform an alarm according to the processing signal. Whether the alarm module gives an alarm or not is determined that the electromagnetic radiation of the position where the camera is located is a strong electromagnetic radiation area, and then the camera is determined to be installed enough, so that the installation position of the camera can be guided through the electric field intensity detection circuit, the electromagnetic radiation of the installation position of the camera is small, and the normal use of the camera is not influenced.

To sum up, the embodiment of the utility model provides an electric field intensity detection circuitry, acquire the electric field intensity in the camera position through signal receiving module, enlarge the electric field through the signal amplification module, send to alarm module after handling the signal through the signal processing module, whether report to the police through alarm module and confirm that the position electromagnetic radiation that the camera was located is the strong electromagnetic radiation region, and then confirm that the camera is enough to install here, guarantee to guide the mounted position of camera through electric field intensity detection circuitry, it is less to guarantee that camera mounted position department electromagnetic radiation, do not influence camera normal use.

Above is the utility model discloses a core thought combines two kinds of concrete electric field intensity detection circuit, the detailed description below the utility model discloses the technical scheme of embodiment.

Optionally, fig. 3 is a schematic circuit structure diagram of an electric field strength detection circuit provided in an embodiment of the present invention, as shown in fig. 3, the signal amplification module 12 may include a power supply 121, a gain adjustment resistor 122, and at least one stage of signal amplification unit 123, where the signal amplification unit 123 includes an amplification transistor 1231 and a first resistor 1232; a first end of the first resistor 1232 is electrically connected to the power supply 121, and a second end of the first resistor 1232 is connected to the input end of the amplifying transistor 1231; the control end of the amplifying transistor 1231 is an induced voltage signal receiving end and is electrically connected to the induced voltage signal output end, or the control end of the amplifying transistor 1231 is electrically connected to the output end of the amplifying transistor 1231 in the previous stage of signal amplifying unit 123; the output end of the amplifying transistor 1231 is an amplifying signal output end and is connected to the amplifying signal receiving end, or the output end of the amplifying transistor 1231 is electrically connected to the control end of the amplifying transistor 1231 in the next-stage signal amplifying unit 123; a first end of the gain adjusting resistor 122 is electrically connected to the amplified signal output terminal, and a second end of the gain adjusting resistor 122 is grounded.

For example, fig. 3 illustrates that the signal amplification module 12 includes three stages of signal amplification units 123, which are a first stage signal amplification unit 123, a second stage signal amplification unit 123 ', and a third stage signal amplification unit 123 ", respectively, where the first stage signal amplification unit 123 includes an amplification transistor 1231 and a first resistor 1232, the second stage signal amplification unit 123' includes an amplification transistor 1231 'and a first resistor 1232', and the third stage signal amplification unit 123" includes an amplification transistor 1231 "and a first resistor 1232". In addition, in fig. 3, the control terminal of the amplifying transistor 1231 in the first-stage signal amplifying unit 123 is used as an induced voltage signal receiving terminal and is electrically connected to the induced voltage signal output terminal; the output end of the amplifying transistor 1231 "in the third stage signal amplifying unit 123" is used as an amplified signal output end, and is connected to an amplified signal receiving end.

Specifically, as shown in fig. 3, a first end of a first resistor 1232 in the first-stage signal amplifying unit 123 is electrically connected to the power supply 121, and a second end of the first resistor 1232 is connected to an input end of the amplifying transistor 1231; the control end of the amplifying transistor 1231 is an induced voltage signal receiving end, and is electrically connected to the induced voltage signal output end, and the output end of the amplifying transistor 1231 is electrically connected to the control end of the amplifying transistor 1231 'in the second-stage signal amplifying unit 123'; a first end of a first resistor 1232 'in the second-stage signal amplifying unit 123' is electrically connected to the power supply 121, and a second end of the first resistor 1232 'is connected to an input end of the amplifying transistor 1231'; the control end of the amplifying transistor 1231 'is electrically connected to the output end of the amplifying transistor 1231 in the first-stage signal amplifying unit 123, and the output end of the amplifying transistor 1231' is electrically connected to the control end of the amplifying transistor 1231 "in the third-stage signal amplifying unit 123"; a first end of a first resistor 1232 "in the third-stage signal amplifying unit 123" is electrically connected to the power source 121, and a second end of the first resistor 1232 "is connected to an input end of the amplifying transistor 1231"; the control terminal of the amplifying transistor 1231 ″ is electrically connected to the output terminal of the amplifying transistor 1231 'in the second stage signal amplifying unit 123', and the output terminal of the amplifying transistor 1231 ″ is an amplified signal output terminal and is connected to the amplified signal receiving terminal, thereby realizing three-stage amplification of the induced voltage.

Further, the embodiment of the utility model provides a signal amplification module 12 can also include gain adjustment resistance 122, and gain adjustment resistance 122's first end is connected with the signal output part electricity of enlargiing, and gain adjustment resistance 122's second end ground connection realizes that the gain is adjustable through gain adjustment resistance 122, guarantees that the induced voltage after the gain is located signal processing module's processing range, and follow-up signal processing module can normally carry out signal processing.

It should be noted that the embodiment of the present invention provides a signal amplification module, which can include a first-level signal amplification unit, the embodiment of the present invention does not limit this, and fig. 3 only illustrates that the signal amplification module includes a third-level signal amplification unit as an example. When the signal amplification module comprises a first-stage signal amplification unit, the control end of an amplification transistor in the first-stage signal amplification unit is an induction voltage signal receiving end, and the output end of the amplification transistor in the first-stage signal amplification unit is an amplification signal output end; when the signal amplification module comprises a plurality of stages of signal amplification units, the control end of the amplification transistor in the first stage of signal amplification unit is an induction voltage signal receiving end, and the output end of the amplification transistor in the last stage of signal amplification unit is an amplification signal output end.

It should be noted that the embodiment of the present invention only uses the amplifying transistor as an example, and it can be understood that the embodiment of the present invention provides an amplifying transistor which can also be an amplifying transistor of a PNP structure, and the embodiment of the present invention does not limit this.

Optionally, fig. 4 is a schematic circuit structure diagram of another electric field strength detecting circuit provided in the embodiment of the present invention, as shown in fig. 4, the signal amplifying module 12 may include an operational amplifier 124, a second resistor 125, a third resistor 126, and a fourth resistor 127; a first end of the second resistor 125 is electrically connected to the induced voltage signal output end, and a second end of the second resistor 125 is electrically connected to the inverting input end of the operational amplifier 124; a first end of the third resistor 126 is electrically connected to the non-inverting input terminal of the operational amplifier 124, and a second end of the third resistor 126 is grounded; a first end of the fourth resistor 127 is electrically connected to the output end of the operational amplifier 124, and a second end of the fourth resistor 127 is electrically connected to the inverting input end of the operational amplifier 124; the inverting input terminal of the operational amplifier 124 is an induced voltage signal receiving terminal, and the output terminal of the operational amplifier 124 is an amplified signal output terminal.

Exemplarily, the embodiment of the present invention provides a signal amplification module 12, which can realize the amplification of the induced voltage by setting the operational amplifier 124, and ensure that the induced voltage amplification process is simple. Specifically, as shown in fig. 4, the non-inverting input terminal of the operational amplifier 124 is pulled down to the ground through the third resistor 126, the fourth resistor 127 is disposed between the inverting input terminal and the output terminal of the operational amplifier 124, and the inverting input terminal of the operational amplifier 124 serves as an induced voltage signal receiving terminal, so that the induced voltage signal is amplified, and the amplified induced voltage signal is output through the output terminal of the operational amplifier 124.

Further, a second resistor 125 is disposed between the signal receiving module 11 and the signal amplifying module 12, and the second resistor 125 is used as a protection resistor between lines to ensure that the electric field strength detection circuit works normally.

As a possible implementation manner, as shown in fig. 3 and fig. 4, the signal processing module 13 provided in the embodiment of the present invention may include a comparator 131; the positive phase input end of the comparator 131 is an amplified signal receiving end, the negative phase input end of the comparator 131 is a reference level signal, and the output end of the comparator 131 is a processed signal output end; the reference level signal is a level signal corresponding to the maximum electromagnetic radiation which can be borne by the camera.

For example, the signal processing module 13 may be a comparator 131, a positive input terminal of the comparator 131 serves as an amplified signal receiving terminal, and receives the induced voltage signal amplified by the signal amplifying module 12, a negative input terminal of the comparator 131 receives a reference level signal, and the reference level signal is a level signal corresponding to the maximum electromagnetic radiation that can be borne by the camera, so that when the amplified induced voltage signal received by the positive input terminal is greater than the reference level signal, the output terminal of the comparator 131 outputs a high level signal; when the amplified induced voltage signal received by the non-inverting input terminal is less than the reference level signal, the output terminal of the comparator 131 outputs a low level signal. The high level signal or the low level signal output from the output terminal of the comparator 131 is the processing signal. By arranging the signal processing module 13 to include the comparator 131, the simple and efficient signal processing process is ensured, and the signal processing efficiency is improved.

On the basis of the above embodiment, as shown in fig. 3 and 4, the alarm module 14 provided by the embodiment of the present invention may include an alarm display unit 141 and/or a remote alarm unit 142; the alarm display unit 141 includes a processing signal receiving end, and/or the remote alarm unit 142 includes a processing signal receiving end.

For example, fig. 3 and fig. 4 both take the case that the alarm module 14 includes both the alarm display unit 141 and the remote alarm unit 142 as an example, when the alarm module 14 includes both the alarm display unit 141 and the remote alarm unit 142, the alarm display unit 141 includes a processing signal receiving end for receiving the processing signal output by the signal processing module 13 and performing alarm display based on the processing signal; meanwhile, the remote alarm unit 142 also includes a processing signal receiving terminal for receiving the processing signal outputted from the signal processing module 13 and transmitting a remote alarm signal to the remote network terminal based on the processing signal.

Can guarantee including warning display element and/or remote alarm unit through setting up alarm module the embodiment of the utility model provides an electric field strength detection circuitry's alarm mode is nimble various, uses different warning occasions.

On the basis of the above-described embodiment, as shown with continued reference to fig. 3 and 4, the alarm display unit 141 includes the first status indicator lamp 1411, the second status indicator lamp 1412, and the inverter 1413; a first end of the first status indicator light 1411 is electrically connected with the processed signal output end, and a second end of the first status indicator light 1411 is grounded; a first terminal of the inverter 1413 is electrically connected to the processed signal output terminal, a second terminal of the inverter 1413 is electrically connected to a first terminal of the second status indicator light 1412, and a second terminal of the second status indicator light 1412 is grounded; a first terminal of the first status indicator lamp 1411 and a first terminal of the inverter 1413 are processing signal receiving terminals.

For example, the first status indicator light 1411 may be a red LED light and the second status indicator light 1412 may be a green LED light. Further, a first end of the first status indicator light 1411 may be a positive pole of a red LED light, a second end of the first status indicator light 1411 may be a negative pole of a red LED light, a first end of the second status indicator light 1412 may be a positive pole of a green LED light, and a second end of the second status indicator light 1412 may be a negative pole of a green LED light. As shown in fig. 3 and 4, the positive electrode of the red LED lamp is used as a signal processing receiving terminal and is directly connected to the signal processing module 13, and the positive electrode of the green LED lamp is connected to the signal processing module 13 through the inverter 1413. When the signal processing module 13 includes the comparator 131, and the amplified induced voltage signal received by the non-inverting input terminal of the comparator 131 is greater than the reference level signal, the output terminal of the comparator 131 outputs a high level signal, the high level signal directly drives the red LED lamp to emit light and alarm, and meanwhile the high level signal is converted into a low level signal after passing through the inverter 1413, and at this time, the green LED lamp does not emit light; the condition that the red light LED lamp emits light and the green light LED lamp does not emit light can be understood as an alarm state, which indicates that the position of the camera is a strong electromagnetic radiation area and the installation position of the camera needs to be changed; when the amplified induced voltage signal received by the positive phase input end of the comparator 131 is smaller than the reference level signal, the output end of the comparator 131 outputs a low level signal, the low level signal cannot drive the red LED lamp to emit light for alarm, but the low level signal passes through the inverter 1413 and is converted into a high level signal, and at this time, the green LED lamp emits light; the condition that the red light LED lamp does not emit light and the green light LED lamp emits light can be understood as a non-alarm state, the condition that the position of the camera is a weak electromagnetic radiation area at the moment is indicated, and the condition that the position of the camera is a reasonable installation position of the camera can be determined.

Through setting up the warning display element and including first status indicator lamp, second status indicator lamp and phase inverter, guarantee can directly perceivedly confirm whether the position that the camera was located is the reasonable mounted position of camera, conveniently direct-viewing guides the camera mounted position.

Based on the above implementation, as shown in fig. 3 and 4, the alarm display unit 141 may further include a fifth resistor 1414 and a sixth resistor 1415; a first end of the fifth resistor 1414 is electrically connected with a second end of the first status indicator lamp 1411, and a second end of the fifth resistor 1414 is grounded; a first terminal of the sixth resistor 1415 is electrically connected to a second terminal of the second status indicator light 1412, and a second terminal of the sixth resistor 1415 is grounded.

Illustratively, the fifth resistor 1414 is connected in series in the connection loop of the first status indicator lamp 1411, so that the connection loop of the first status indicator lamp 1411 is protected, and the first status indicator lamp 1411 is ensured to normally emit light; similarly, the sixth resistor 1415 is connected in series in the connection loop of the second status indicator lamp 1412, so that the connection loop of the second status indicator lamp 1412 is ensured to be protected, and the second status indicator lamp 1412 is ensured to normally emit light.

On the basis of above-mentioned implementation, the embodiment of the utility model provides a remote alarm unit 142 is including handling signal receiving terminal and remote alarm signal output terminal, remote alarm signal output terminal and remote network terminal communication connection.

For example, the embodiment of the present invention provides a remote alarm unit 142, which can implement remote alarm. Specifically, the remote alarm unit 142 includes a remote alarm signal output terminal, and the remote alarm signal output terminal is in communication connection with a remote network terminal. When the signal processing module 13 includes the comparator 131, and the amplified induced voltage signal received by the non-inverting input terminal of the comparator 131 is greater than the reference level signal, the output terminal of the comparator 131 outputs a high level signal, and at this time, the remote alarm signal output terminal sends a remote alarm signal to the remote network terminal, so as to prompt that the position of the camera is a strong electromagnetic radiation area and the installation position of the camera needs to be changed; when the amplified induced voltage signal received by the positive phase input terminal of the comparator 131 is smaller than the reference level signal, the output terminal of the comparator 131 outputs a low level signal, and at this time, the remote alarm signal output terminal does not send a remote alarm signal to the remote network terminal, so as to prompt that the position of the camera is a weak electromagnetic radiation area, and the position of the camera is a reasonable installation position of the camera.

Further, remote Network terminal can be Network Video Recorder (NVR) or PC, the embodiment of the utility model provides a do not restrict this.

Optionally, as a feasible implementation manner, the embodiment of the present invention provides a signal receiving module 11, which may include a full-band signal receiving antenna, and ensure that the signal receiving module 11 may receive electromagnetic wave signals in each frequency band, and may receive electromagnetic waves transmitted by each electromagnetic wave transmitting device, such as electromagnetic waves transmitted by a communication signal tower, a broadcast television tower, and an airport radar.

It should be noted that the foregoing is only a preferred embodiment of the present invention and the technical principles applied. Those skilled in the art will appreciate that the present invention is not limited to the specific embodiments described herein, but that the features of the various embodiments of the invention may be partially or fully coupled to each other or combined and may cooperate with each other and be technically driven in various ways. Numerous obvious variations, rearrangements, combinations, and substitutions will now occur to those skilled in the art without departing from the scope of the invention. Therefore, although the present invention has been described in greater detail with reference to the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the scope of the present invention.

Claims

1. A camera is characterized by comprising an electric field strength detection circuit;

the electric field intensity detection circuit comprises a signal receiving module, a signal amplifying module, a signal processing module and an alarm module;

the induction voltage signal output end is electrically connected with the induction voltage signal receiving end, the amplified signal output end is electrically connected with the amplified signal receiving end, and the processed signal output end is electrically connected with the processed signal receiving end;

the electric field intensity detection circuit is used for detecting the electric field intensity at the position where the camera is located so as to guide the installation position of the camera.

2. The camera of claim 1, wherein the signal amplification module comprises a power supply, a gain adjustment resistor, and at least one stage of signal amplification unit, the signal amplification unit comprising an amplification transistor and a first resistor;

3. The camera of claim 1, wherein the signal amplification module comprises an operational amplifier, a second resistor, a third resistor, and a fourth resistor;

4. The camera of claim 1, wherein the signal processing module comprises a comparator;

5. The camera according to any of claims 1 to 4, characterized in that said alarm module comprises an alarm display unit and/or a remote alarm unit;

6. The camera of claim 5, wherein the alarm display unit comprises a first status indicator light, a second status indicator light, and an inverter;

7. The camera of claim 6, wherein the alarm display unit further comprises a fifth resistor and a sixth resistor;

8. The camera of claim 5, wherein the remote alarm unit comprises the processing signal receiving end and a remote alarm signal output terminal, the remote alarm signal output terminal being communicatively connected to a remote network terminal.

9. The camera of claim 1, wherein the signal receiving module comprises a full band signal receiving antenna.