CN110332984A - A mobile internet-based noise test system for substations - Google Patents

Abstract

The invention relates to a noise testing system for substations based on mobile interconnection. A microphone is arranged on one side surface of a sound distance measuring machine head, and a horizontal distance sensor is arranged on the surface of the sound distance measuring machine head where the microphone is located. A vertical distance sensor is arranged on the bottom surface of the machine head; a noise monitoring and processing unit is arranged in the sound distance measurement machine head, and the noise monitoring and processing unit is connected to the control end of the lifting bracket, the output end of the horizontal distance sensor, the output end of the vertical distance sensor and the the output of the microphone. The present invention utilizes the mobile interconnection technology, so that the operator can use the mobile device to obtain the distance information between the monitoring point and the monitoring device, set the required height, control the automatic expansion and contraction of the lifting bracket, control the noise monitoring and obtain the monitoring results, and can realize the cloud storage of the monitoring data. , cloud download, can solve the inconvenience when the monitoring point is high, simplify the process of distance measurement and monitoring data recording, and realize the permanent preservation of monitoring results.

Description

A mobile internet-based noise test system for substations

technical field

The invention belongs to the technical field of noise measurement for substations, in particular to a noise testing system for substations based on mobile interconnection.

Background technique

When measuring noise in substations, one of the current measurement methods is to install the instrument on a special bracket, and the height of the microphone position from the ground must remain unchanged during the measurement, and the other is to use no bracket. The microphone should be aligned with the direction of the noise source, and the meter should not be placed close to the body. The measuring personnel should be more than 0.5m away from the meter when reading in the two measurement methods to ensure the accuracy of the measurement. The above two measurement methods have the following problems: First, when the measurement height is high (for example, when measuring the noise at the station boundary with a wall, the measurement point must be 0.5m higher than the wall), at this time, the bracket cannot meet the height requirements, and manual hand-held measurement is also required. It is more laborious; second, the distance between the sight and the instrument is far, which is not convenient for reading and data recording. In addition, in noise measurement, the microphone is required to maintain a fixed horizontal distance from the equipment under test or the station boundary. The current practice is usually to use the distance measuring equipment to measure the distance first, and then use the sound level meter to measure the noise, which is inefficient.

SUMMARY OF THE INVENTION

The purpose of the present invention is to overcome the deficiencies of the prior art, and to provide a mobile internet-based mobile internet-based mobile Internet-based mobile Internet-based mobile Internet-based mobile Internet-based mobile Internet-based mobile Internet-based mobile Internet-based mobile Internet-based mobile Internet-based mobile Internet-based mobile Internet-based mobile Internet-based mobile Internet-based mobile Internet-based mobile Internet-based mobile Internet-based mobile internet-based mobile Internet-based mobile Internet-based mobile Internet-based mobile Internet technology Noise test system for substations.

The concrete technical scheme adopted in the present invention is as follows:

A noise testing system for substations based on mobile interconnection, which is characterized in that it includes a sound distance measuring head and a lifting bracket, the bottom surface of the sound distance measuring head is connected with the upper end of the lifting bracket, and the side surface of the sound distance measuring head is connected with the upper end of the lifting bracket. A microphone is provided, a horizontal distance sensor is arranged on the surface of the sound distance measurement head where the microphone is located, and a vertical distance sensor is arranged on the bottom surface of the sound distance measurement head below the microphone; the noise monitoring and processing unit set in the sound distance measurement head, the The noise monitoring processing unit is connected to the control end of the lifting bracket, the output end of the horizontal distance sensor, the output end of the vertical distance sensor and the output end of the microphone.

Furthermore, the noise monitoring processing unit includes an attenuation-amplifier module, a filter module, a detector module, a wireless transceiver module, an A/D converter module and a central control module;

The central control module is connected to the output end of the horizontal distance sensor and the output end of the vertical distance sensor through an A/D converter module;

The central control module is connected to one end of the detector module, the other end of the detector module is connected to one end of the filter module, the other end of the filter module is connected to one end of the attenuation-amplifier module, and the other end of the attenuation-amplifier module is connected to the microphone. the output terminal;

The central control module is connected to the cloud server through a wireless transceiver module;

The central control module is connected to the control end of the lifting bracket.

Furthermore, the cloud server is connected to the mobile client in a wireless manner.

Furthermore, the lifting bracket includes an outer casing, a fixed pipe, a secondary telescopic rod, a tertiary telescopic rod, a foot pipe and a stepper motor, and a plurality of supporting foot pipes are arranged on the outer edge of the outer casing, and the outer casing is sleeved with energy The first-level telescopic rod that moves vertically, the second-level telescopic rod that can move vertically is set in the first-level telescopic rod, and the third-stage telescopic rod that can move vertically is set in the second-level telescopic rod, and the stepper motor passes through the steel The cable pulls the secondary telescopic rod to vertically move upwards from the fixed pipe and the third-stage telescopic rod to vertically move upwards from the secondary telescopic rod.

Furthermore, a top fixed pulley and a bottom fixed pulley are respectively arranged on the same side of the upper end and the lower end of the fixed pipe; an internal fixed pulley is arranged on the side of the lower end of the secondary telescopic rod and aligned with the bottom fixed pulley, which is in line with the internal fixed pulley. Another internal fixed pulley is arranged on the other side of the lower end of the secondary telescopic rod with symmetrical pulleys; an upper fixed pulley is arranged on the upper end of the secondary telescopic rod aligned with the other internal fixed pulley;

The stepping motor drives a pulley to rotate, the pulley pulls one end of the wire rope, and the wire rope passes through the outer side of the bottom fixed pulley, the outer side of the top fixed pulley, the inner side of the top fixed pulley, the outer side of one internal fixed pulley, the bottom of one internal fixed pulley, and the other. The bottom of the inner fixed pulley, the outer side of the other inner fixed pulley, the outer side of the upper fixed pulley and the inner side of the upper fixed pulley are connected to the outer edge of the three-stage telescopic rod.

Furthermore, a tension spring is provided on the bottom surface of the third-stage telescopic rod and the inner bottom of the secondary telescopic rod, and a tension spring is provided on the bottom surface of the secondary telescopic rod and the inner bottom of the fixed tube.

Furthermore, the outer edge of the outer sleeve is sleeved with a fixing ring, the fixing ring is radially provided with a plurality of protrusions with grooves, and each groove is hinged with a leg tube.

Furthermore, a hook is provided between the foot tube and the outer sleeve.

Furthermore, the bottom surface of the foot tube is provided with a non-slip pad.

The advantages and beneficial effects of the present invention are:

The invention utilizes mobile interconnection technology, so that operators can use mobile devices such as mobile phones or computers to obtain the distance information between the monitoring point and the monitoring device, set the required height, control the automatic expansion and contraction of the lifting bracket, control noise monitoring, and obtain monitoring results. Using mobile Internet technology, the mobile client can establish contact with the server through the Internet, which can realize cloud storage and cloud download of monitoring data. The invention can not only solve the inconvenience when the monitoring point is high, but also greatly simplifies the distance measurement and the recording process of monitoring data, and can realize the permanent preservation of monitoring results.

Description of drawings

Fig. 1 is the structural representation of the present invention;

Figure 2 is an enlarged cross-sectional view of the interior of the outer casing;

Figure 3 is a schematic diagram of a three-stage telescopic rod and a two-stage telescopic rod moving vertically upward;

Figure 4 is a block diagram of the control principle of the present invention.

Detailed ways

The present invention is further described in detail through the following examples, but the technical contents described in the examples are illustrative rather than restrictive, and should not limit the protection scope of the present invention accordingly.

A noise test system for substations based on mobile interconnection, as shown in Figures 1, 2, 3, and 4, the innovation of the present invention is that it includes a sound distance measuring head 1 and a lifting bracket, the bottom surface of the sound distance measuring head and the lifting bracket The upper end of the sound distance measuring machine head is connected with a microphone 5 on one side surface of the sound distance measuring machine head. The surface of the sound distance measuring machine head where the microphone is located is provided with a horizontal distance sensor 3, and the bottom surface of the sound distance measuring machine head below the microphone is provided with a vertical distance sensor. 4.

The noise monitoring and processing unit is arranged in the head of the sound distance measurement. The noise monitoring and processing unit is connected to the control end of the lifting bracket, the output end of the horizontal distance sensor, the output end of the vertical distance sensor and the output end of the microphone.

In this embodiment, the noise monitoring processing unit, as shown in FIG. 4 , includes an attenuation-amplifier module, a filter module, a detector module, a wireless transceiver module, an A/D converter module, and a central control module. The central control module connects the output end of the horizontal distance sensor and the output end of the vertical distance sensor through the A/D converter module. The central control module is connected to one end of the detector module, the other end of the detector module is connected to one end of the filter module, the other end of the filter module is connected to one end of the attenuation-amplifier module, and the other end of the attenuation-amplifier module is connected to the output of the microphone. The central control module is connected to the cloud server through the wireless transceiver module. The central control module is connected to the control end of the lifting bracket. The cloud server is wirelessly connected to the mobile client, and the mobile client includes the user's mobile phone and computer.

The microphone converts the monitored sound pressure signal into an electrical signal, the signal is attenuated-amplified to improve the signal-to-noise ratio, and then the output signal is transmitted to the filter to frequency weight the signal, and then the weighted signal is sent to the To the detector to detect a valid signal, and send this signal to the central control module, the control board will process the received valid signal and convert it into sound level information, and send the sound level information to the wireless transceiver module, and the wireless transceiver module will The sound level information is uploaded to the cloud server, and the cloud server processes the information transmission request and sends the sound level information to the mobile client.

The working mechanism of horizontal distance measurement: The horizontal distance sensor measures the distance by laser, and the sensed signal is converted by the A/D converter and transmitted to the central control module. The central control module processes the signal into distance information and deducts the horizontal distance sensor and microphone. After the outermost horizontal distance, the distance information is transmitted to the cloud server through the wireless transceiver module, and the cloud server processes the information transmission request and sends the distance information to the mobile client.

The mobile client operator inputs the required height (ie, the vertical distance between the center of the microphone and the ground) on the software interface of the mobile client, and the vertical distance information can be transmitted to the central control module through the cloud server and the wireless transceiver module in turn.

Working mechanism of vertical distance measurement: The vertical distance sensor measures the distance by laser, and the sensed signal is converted by the A/D converter and transmitted to the central control module. The central control module processes the signal into distance information and adds the vertical distance sensor and the sensor. After the vertical distance between the center of the microphone, compare it with the distance information from the mobile user terminal. When the two distance information is inconsistent, the lifting bracket is lifted to achieve different heights, and then the input required height is compared with the vertical distance sensor. The height comparison, until the two are the same, the lifting bracket maintains the height.

The core control chip of the above-mentioned central control module is a Cortex-M3 chip. Each electrical component is powered by an external lithium battery, a built-in lithium battery in the lifting bracket, or the mains.

The working process of the present invention is:

1. After the operator threadedly connect the sound distance measuring head to the upper end of the lifting bracket, place the microphone facing the monitoring equipment or the wall.

2. The horizontal distance sensor measures the distance by laser, and the sensed signal is converted by the A/D converter and transmitted to the central control module. The central control module processes the signal into distance information and deducts the horizontal distance between the horizontal distance sensor and the outermost end of the microphone. Then, the distance information is transmitted to the cloud server through the wireless transceiver module, and the cloud server processes the information transmission request and sends the distance information to the mobile client, that is, the operator's mobile phone. Monitor the horizontal distance between objects until they meet the requirements of the work standard.

3. The operator inputs the required height on the software interface of the mobile user terminal, and the vertical distance information can be transmitted to the central control module through the cloud server and the wireless transceiver module in turn. At the same time, the vertical distance sensor uses laser ranging, and the sensed signal is converted by the A/D converter and then transmitted to the central control module. The central control module processes the signal into distance information and adds the vertical distance between the vertical distance sensor and the center of the microphone. Then, compare with the distance information sent from the mobile user terminal. When the two distance information are inconsistent, the height of the lifting bracket is changed by the operation of the stepping motor.

4. When the measured horizontal distance and vertical distance meet the requirements, the mobile user terminal issues an instruction to start the noise monitoring, and the instruction is transmitted to the central control module through the cloud server and the wireless transceiver module. The central control module can control the microphone to start, and the microphone will monitor the noise. The resulting sound pressure signal is converted into an electrical signal, the signal is attenuated-amplified to improve the signal-to-noise ratio, the output signal is then passed to a filter to frequency weight the signal, and the weighted signal is sent to a detector In order to detect a valid signal, and send this signal to the central control module, the central control module processes the received valid signal and converts it into sound level information, and sends the sound level information to the wireless transceiver module, and the wireless transceiver module converts the sound level. The information is uploaded to the cloud server, and the cloud server processes the information transmission request and sends the sound level information to the mobile client. In addition, the infrasound level monitoring information can also be stored in the storage space of the cloud server, and the mobile client with authority Customers can realize cloud download of monitoring information.

The lifting bracket includes an outer casing 6, a fixed pipe 20, a secondary telescopic rod 17, a tertiary telescopic rod 2, a foot pipe 11 and a stepping motor 31. The outer edge of the outer casing is provided with a plurality of supporting legs, which are sleeved inside the outer casing. The first-level telescopic rod that can move vertically, the second-level telescopic rod that can move vertically is set in the first-level telescopic rod, and the third-stage telescopic rod that can move vertically is set in the second-level telescopic rod, and the stepping motor passes through the steel cable 21 Pull the secondary telescopic rod to vertically move upwards from the fixed tube and the third-stage telescopic rod to vertically move upwards from the secondary telescopic rod.

A top fixed pulley 18 and a bottom fixed pulley 27 are respectively provided on the same side (right side in FIG. 2 ) of the upper end and the lower end of the fixed tube. An internal fixed pulley 25 is arranged on one side of the lower end of the secondary telescopic rod and aligned with the bottom fixed pulley, and another internal fixed pulley is arranged on the other side of the lower end of the secondary telescopic rod which is symmetrical with the internal fixed pulley. An upper fixed pulley 16 is provided on the upper end of the secondary telescopic rod aligned with another inner fixed pulley.

The output shaft of the stepping motor drives the sprocket 30, the pulley or the gear, and then drives a pulley 28 to rotate through the chain, belt, and gear. The right side of the middle number 27), the outer side of the top set pulley (the right side of the number 18 in Figure 2), the inside of the top set pulley (the left side of the number 18 in Figure 2), the outer side of one internal set pulley (the right side of the number 25 in Figure 2), a The bottom of the inner fixed pulley (the bottom of the reference number 25 in Figure 2), the bottom of the other inner fixed pulley, the outside of the other inner fixed pulley, the outer side of the upper fixed pulley (the left side of the reference numeral 16 in Figure 2) and the inner side of the upper fixed pulley (the right side of the reference numeral 16 in Figure 2) ) is connected to the protruding column 23 arranged on the outer edge of the third-stage telescopic rod.

In order to realize the rapid reset of the third-stage telescopic rod and the second-stage telescopic rod, a tension spring 24 is provided on the bottom surface of the third-stage telescopic rod and the inner bottom of the second-stage telescopic rod, and a tension spring 24 is provided on the bottom surface of the second-stage telescopic rod and the inner bottom of the fixed tube.

A fixing ring 7 is sleeved on the outer edge of the outer sleeve. The fixing ring is radially provided with a plurality of protrusions 8 with grooves 9 , and the upper end of the leg tube is hingedly mounted in each groove through a hinge shaft 10 .

In order to make the support of the foot tube more stable, a hook 14 is arranged between the foot tube and the outer sleeve. One end of the hook is hinged with the hinge shaft 12 on the outer edge of the outer sleeve, and the other end is hung on the buckle arranged on the outer edge of the foot tube. 13 on.

In order to improve the anti-skid ability of the lifting bracket, anti-skid pads 15 are provided on the bottom surface of each leg tube. When all the fixed pulleys are installed, the corresponding telescopic rods and the side walls of the fixed pipe are provided with gaps 19 to accommodate the fixed pulleys and ensure their normal rotation. In Figure 2, the distance between the third-level telescopic rod and the second-level telescopic rod and the distance between the second-level telescopic rod and the fixed pipe are drawn larger, in order to be able to see the positional relationship between them more clearly , not so large in actual use. In actual use, grooves are made on the pipe wall aligned with the steel cable to accommodate the steel cable, thereby reducing the above-mentioned distance. For example, taking the steel cable at number 21 as an example, vertical The groove can accommodate the steel cable at 21; another example: the steel cable at 22 is just accommodated in the vertical groove provided on the inner edge of the secondary telescopic rod.

The working process of the lifting bracket is:

1. When extending: the stepping motor rotates, pulling the wire rope, and the wire rope is continuously wound around the outer edge of the pulley, thereby making the secondary telescopic rod and the tertiary telescopic rod move vertically upward as shown in Figure 3. At this time, the two tension springs are stretched.

2. When retracting: the stepping motor stops working, one tension spring pulls the third-level telescopic rod and retracts into the second-level telescopic rod, and the other pulls the second-level telescopic rod and retracts into the fixed tube.

The invention utilizes mobile interconnection technology, so that operators can use mobile devices such as mobile phones or computers to obtain the distance information between the monitoring point and the monitoring device, set the required height, control the automatic expansion and contraction of the lifting bracket, control noise monitoring, and obtain monitoring results. Using mobile Internet technology, the mobile client can establish contact with the server through the Internet, which can realize cloud storage and cloud download of monitoring data. The invention can not only solve the inconvenience when the monitoring point is high, but also greatly simplifies the distance measurement and the recording process of monitoring data, and can realize the permanent preservation of monitoring results.

Claims (9)

1. a kind of substation's noise measuring system based on mobile interchange, it is characterised in that: including sounding head and liter The upper end of descending branch frame, sounding head bottom surface and lifting support connects, and one side surface of sounding head is provided with Horizontal distance sensor, the throw below the microphone is arranged in microphone, the surface of the sounding head where the microphone Vertical distance sensor is arranged in the bottom surface for measuring head；The noise monitoring processing unit being arranged in sounding head, the noise Monitoring processing unit connects the control terminal of the lifting support, the output end of horizontal distance sensor, vertical distance sensor The output end of output end and microphone.

2. a kind of substation's noise measuring system based on mobile interchange according to claim 1, it is characterised in that: institute Stating noise monitoring processing unit includes decaying-amplifier module, filter module, wave detector module, radio receiving transmitting module, A/D Conversion module and central control module；

The central control module by A/D converter module connect the horizontal distance sensor output end pass through and The output end of vertical distance sensor；

One end of the central control module tie geophone module, the one of the other end connection filter module of wave detector module End, the other end of filter module connect decaying-amplifier module one end, and decaying-amplifier module other end connects institute State the output end of microphone；

The central control module connects Cloud Server by radio receiving transmitting module；

The central control module connects the control terminal of the lifting support.

3. a kind of substation's noise measuring system based on mobile interchange according to claim 2, it is characterised in that: institute It states Cloud Server and wirelessly connects mobile client.

4. a kind of substation's noise measuring system based on mobile interchange according to claim 1 or 2 or 3, feature Be: the lifting support includes outer tube, fixing pipe, second level telescopic rod, three-level telescopic rod, foot tube and stepper motor, housing Multiple foot tubes being used to support are arranged in pipe outer rim, flexible in level-one in the vertically movable level-one telescopic rod of outer tube inner sleeve dress energy The second level telescopic rod that suit can be vertically movable in bar, the three-level telescopic rod that suit can be vertically movable in second level telescopic rod are described Stepper motor is by the way that vertically movable and three-level telescopic rod is flexible from second level upwards in cable traction second level telescopic rod self-retaining pipe It is upward vertically movable in bar.

5. a kind of substation's noise measuring system based on mobile interchange according to claim 4, it is characterised in that: A top fixed pulley and a bottom fixed pulley is respectively set in the same side of fixing pipe upper and lower end；Under second level telescopic rod One interior fixed pulley of setting of end side and the contraposition of bottom fixed pulley, it is another with the interior fixed pulley symmetrical second level telescopic rod lower end Another interior fixed pulley is arranged in side；It is arranged one with the second level telescopic rod upper end that fixed pulley in another aligns above to slide calmly Wheel；

The stepper motor drives a pulley rotation, which pulls one end of cable wire, the cable wire by the outside of the fixed pulley of bottom, It pushes up on the outside of fixed pulley, top fixed pulley inside, interior fixed pulley outside, an interior fixed pulley bottom, another interior fixed pulley bottom The three-level telescopic rod outer rim is connected on the outside of portion, another interior fixed pulley, behind upper fixed pulley outside and upper fixed pulley inside.

6. a kind of substation's noise measuring system based on mobile interchange according to claim 5, it is characterised in that: institute It states bottom in the bottom surface and second level telescopic rod of three-level telescopic rod and is provided with tension spring, bottom in second level telescopic rod bottom surface and fixing pipe Portion is provided with tension spring.

7. a kind of substation's noise measuring system based on mobile interchange according to claim 5 or 6, feature exist In: the outer tube outer rim is set with fixed ring, which is arranged multiple reeded protrusions of band, each groove Interior hinge fills a foot tube.

8. a kind of substation's noise measuring system based on mobile interchange according to claim 7, it is characterised in that: foot Hook is provided between pipe and outer tube.

9. a kind of substation's noise measuring system based on mobile interchange according to claim 8, it is characterised in that: institute It states foot tube bottom surface and is provided with non-slip mat.