DK201600138U4

DK201600138U4 - Transmission system for rat traps monitoring equipment located in sewers, shafts and wells

Info

Publication number: DK201600138U4
Application number: DKBA201600138U
Authority: DK
Inventors: Jan Nørskov
Original assignee: Ratél Aps
Priority date: 2016-12-01
Filing date: 2016-12-01
Publication date: 2018-01-12

Abstract

Den foreliggende frembringelse angår et transmissionssystem til overvågningsudstyr, som er placeret i kloakker, skakte og brønde. Transmissionssystemet omfatter en transmissionsenhed, en trådløs repeater eller et trådløst relæ, placeringsmidler og en modtagerenhed.The present invention relates to a transmission system for surveillance equipment located in sewers, shafts and wells. The transmission system includes a transmission unit, a wireless repeater or wireless relay, placement means and a receiver unit.

Description

Transmissionssystem til overvågningsudstyr til rottefælder, som er placeret i kloakker, skakte og brøndeTransmission system for rat traps monitoring equipment located in sewers, shafts and wells

Frembringelsens områdeThe field of production

Den foreliggende frembringelse angår overvågningsudstyr til rottefælder, som er placeret i kloakker, skakte og brønde.The present invention relates to rat traps monitoring equipment located in sewers, shafts and wells.

Baggrund for frembringelsen I dag placeres overvågningsmidler, såsom sensorer, i kloakker og skakte for at måle mange forskellige forhold. Signaler, som produceres af en sensor, viderebringes over jorden til en sensorovervågnings- og styreenhed via kabler. Men et sådant kommunikationssystem er tidskrævende at installere, og kablerne er følsomme over for det sommetider meget fjendtlige miljø i kloakken eller skakten. For at undgå dette, benyttes meget dyre kabler. Men de gnavere der er tilstede i kloakker og skakte har en tendens til at gnave i kabler, hvorved kommunikationsvejen ødelægges. Desuden er kablerne af indlysende grunde ikke egnede til at blive trukket gennem brønd- eller skaktåbninger og over en vej. US20110056117 beskriver en rottefælde, der omfatter en strømforsyning og aflivningsmidler til aflivning af rotter, og hvor en første sensor er sat op til at opdage tilstedeværelsen af en rotte i området indenfor aflivningsmidlets rækkevidde, og hvor styremidler skal tage imod et signal fra den første sensor og er tilpasset til at aktivere aflivningsmidlet til at aflive rotten, når tilstedeværelsen af en rotte bestemmes af sensoren. Rottefælden kan omfatte elektroniske midler til trådløs overførelse af operationelle parametre til en modtagerenhed, f.eks. oppe på jorden.Background to production Today, monitoring devices, such as sensors, are placed in sewers and shafts to measure many different conditions. Signals produced by a sensor are transmitted above ground to a sensor monitoring and control unit via cables. But such a communication system is time-consuming to install and the cables are sensitive to the sometimes very hostile environment of the sewer or shaft. To avoid this, very expensive cables are used. But the rodents present in sewers and shafts tend to gnaw at cables, thereby destroying the communication path. Furthermore, for obvious reasons, the cables are not suitable for being pulled through well or shaft openings and over a road. US20110056117 discloses a rat trap comprising a power supply and killing means for killing rats, wherein a first sensor is set up to detect the presence of a rat in the range within the range of the killing means, and where control means must receive a signal from the first sensor and is adapted to activate the killing means for killing the rat when the presence of a rat is determined by the sensor. The root trap may comprise electronic means for wirelessly transmitting operational parameters to a receiver unit, e.g. up on earth.

Det er derfor ønskeligt at tilvejebringe et transmissionssystem der undgår, eller i det mindste reducerer, ovennævnte problemer.It is therefore desirable to provide a transmission system that avoids, or at least reduces, the aforementioned problems.

Beskrivelse af frembringelsenDescription of the production

Et første aspekt angår et trådløst transmissionssystem til overvågningsudstyr i rottefælder, der er placeret i kloakker, skakte og brønde, der omfatter: - en transmissionsenhed, som er indlejret i en rottefælde og er konfigureret til at tage imod overvågningsdata fra et overvågningsudstyr, som er indlejret i rottefælden, og til at transmittere de modtagne overvågningsdata; - en trådløs repeater eller et trådløst relæ, som er konfigureret til at tage imod overvågningsdataene fra overvågningsudstyret; - placeringsmidler, som er tilpasset til at placere den trådløse repeater eller det trådløse relæ 5-100 cm under brønd- eller skaktdækslet; og - en modtagerenhed tilpasset til at blive placeret i en afstand af 0-100 meter fra brønd- eller skaftdækslet, og er konfigureret til at modtage et overvågningsdatasignal fra et overvågningsudstyr, som gentages af den trådløse repeater og/eller det trådløse relæ. I nærværende kontekst betyder ordet “repeater” et system der modtager, forstærker og gentransmitterer et trådløst signal uden at fjerne brugerinformationen eller ændre kommunikationsprotokolen. Ordet “relæ” henviser til et system der modtager, afkoder, dataregenererer, datatransmitterer, koder, forstærker og gentransmitterer et trådløst signal.A first aspect relates to a wireless transmission system for monitoring equipment in rat traps located in sewers, shafts and wells comprising: - a transmission device embedded in a rat trap and configured to receive monitoring data from a monitoring device embedded in the rat trap, and to transmit the received monitoring data; - a wireless repeater or wireless relay configured to receive the monitoring data from the monitoring equipment; positioning means adapted to place the wireless repeater or relay 5-100 cm below the well or shaft cover; and - a receiver unit adapted to be located at a distance of 0-100 meters from the well or shaft cover, and configured to receive a monitoring data signal from a monitoring equipment repeated by the wireless repeater and / or the wireless relay. In this context, the word “repeater” means a system that receives, amplifies, and re-transmits a wireless signal without removing the user information or changing the communication protocol. The word "relay" refers to a system that receives, decodes, data generates, data transmits, encodes, amplifies and re-transmits a wireless signal.

Ordet "overvågningsmidler" skal forstås meget bredt i denne sammenhæng. Nogle overvågningsmidler er dog at foretrække, såsom sensorer og flowmetre.The term "monitoring means" must be understood very broadly in this context. However, some monitoring means are preferred, such as sensors and flow meters.

Transmissionssystemet omfatter placeringsmidler, som er tilpasset til at placere den trådløse repeater eller det trådløse relæ 5-100 cm under brønd- eller skaktdækslet, såsom indenfor en rækkevidde af 10-95 cm, f.eks. indenfor en rækkevidde af 15-90 cm, såsom indenfor en rækkevidde af 20-85 cm, f.eks. indenfor en rækkevidde af 25-80 cm, såsom indenfor en rækkevidde af 30-75 cm, f.eks. indenfor en rækkevidde af 35-70 cm, såsom indenfor en rækkevidde af 40-65 cm, f.eks. indenfor en rækkevidde af 45-60 cm. Denne placering er vigtig for at undgå afskærmning fra brønd- eller skaftdækslet, der ofte er lavet af metal. Det omgivende jordlag rundt om brønden eller skakten må desuden heller ikke være for tykt for at det udsendte signal skal kunne passere igennem. Det er derfor transmissionssystemet ikke kan fungere uden den trådløse repeater eller det trådløse relæ, da det udsendte signal fra transmissionsenheden, som er placeret tæt på overvågningsudstyret inde i kloakken eller på bunden af brønden eller skakten, ikke kan trænge igennem the omgivende jordlag rundt om brønden eller skakten; og brønd- eller skaktdækslet vil blokere det resterende signal.The transmission system comprises placement means adapted to place the wireless repeater or wireless relay 5-100 cm below the well or shaft cover, such as within a range of 10-95 cm, e.g. within a range of 15-90 cm, such as within a range of 20-85 cm, e.g. within a range of 25-80 cm, such as within a range of 30-75 cm, e.g. within a range of 35-70 cm, such as within a range of 40-65 cm, e.g. within a range of 45-60 cm. This location is important to avoid shielding from the well or shaft cover, often made of metal. Furthermore, the surrounding soil layer around the well or shaft must not be too thick for the transmitted signal to pass through. That is why the transmission system cannot operate without the wireless repeater or the wireless relay, since the transmitted signal from the transmission unit located close to the monitoring equipment inside the sewer or at the bottom of the well or shaft cannot penetrate the surrounding soil layer around the well. or the shaft; and the well or shaft cover will block the remaining signal.

Transmissionssystemet omfatter en modtagerenhed tilpasset til at blive placeret i en afstand af 0-100 meter fra brønd- eller skaftdækslet, såsom indenfor en rækkevidde af 1-95 meter, f.eks. indenfor en rækkevidde af 2-90 meter, såsom indenfor en rækkevidde af 3-85 meter, f.eks. indenfor en rækkevidde af 4-80 meter, såsom indenfor en rækkevidde af 5-85 meter, f.eks. indenfor en rækkevidde af 10-70 meter, såsom indenfor en rækkevidde af 15-65 meter, f.eks. indenfor en rækkevidde af 20-60 meter, såsom indenfor en rækkevidde af 25-55 meter, f.eks. indenfor en rækkevidde af 30-50 meter, såsom indenfor en rækkevidde af 35-45 meter. Brønde er ofte placeret under en vej, og dermed kan modtagerenheden blokere vejen. Modtagerenheden bør således konfigureres til at modtage signalet fra den trådløse repeater eller det trådløse relæ i en afstand fra brønddækslet. På den anden side er det foretrukket at repeaterens eller det trådløse relæs batterilevetid er så lang som muligt, for at begrænse service under jorden. Dermed bør modtagerenheden være placeret så tæt som muligt på brønddækslet, for at undgå at bruge for meget energi på at transmittere fra repeateren eller det trådløse relæ. Dette medfører en overordnet energibesparelse på hele systemet, hvilket forlænger batterilevetiden på alle komponenter. I en eller flere udførelsesformer, omfatter placeringsmidlerne en forlængelig stang med midler til at fastlåse den forlængelige stang i en bestemt længde; hvor den forlængelige stand yderligere omfatter midler anbragt i begge ender til tilkobling på sidevæggen i en brønd. I en eller flere udførelsesformer, er transmissionsenheden konfigureret til at transmittere med en bølgelængde og frekvens, der ikke kan trænge igennem vandet, når transmitteren er placeret under vand, såsom under 10-100 cm vand. I en eller flere udførelsesformer, er transmissionsenhed konfigureret til at transmittere med en bølgelængde og frekvens, der mindst delvist absorberes i vand eller vand der omfatter ledende urenheder, såsom salte, og hvor den trådløse repeater og/eller modtagerenheden er konfigurerede til at måle tidsintervallet mellem modtagne overvågningsdatasignaler. Tidsintervallet vil give en indirekte indikation på om brønden eller skakten er oversvømmet. I tilfælde af oversvømmelse, kan signalet ikke passere gennem vandet eller det forurenede vand, da det leder dårligt og ydermere kan reflektere signalet. I en eller flere udførelsesformer, er den trådløse repeater eller det trådløse relæ og/eller modtagerenheden konfigurerede til at logge en alarm og/eller at skabe og transmittere et alarmsignal, når tidsintervallet mellem modtagne overvågningsdatasignaler overstiger en forudbestemt tærskel. Dette er vigtigt, idet et tidsinterval der overstiger f.eks. 20 minutter er en indikation på at kloakken er blokeret, hvilket vil få kloakvandet til at stige og slippe ud af kloaksystemet gennem enhver mulig åbning, såsom f.eks. ind i en kælder i et hus.The transmission system comprises a receiver unit adapted to be located at a distance of 0-100 meters from the well or shaft cover, such as within a range of 1-95 meters, e.g. within a range of 2-90 meters, such as within a range of 3-85 meters, e.g. within a range of 4-80 meters, such as within a range of 5-85 meters, e.g. within a range of 10-70 meters, such as within a range of 15-65 meters, e.g. within a range of 20-60 meters, such as within a range of 25-55 meters, e.g. within a range of 30-50 meters, such as within a range of 35-45 meters. Wells are often located under a road, and thus the receiving unit can block the road. Thus, the receiver unit should be configured to receive the signal from the wireless repeater or wireless relay at a distance from the well cover. On the other hand, it is preferred that the battery life of the repeater or the wireless relay is as long as possible to limit service underground. Thus, the receiver unit should be positioned as close as possible to the well cover to avoid spending too much energy transmitting from the repeater or wireless relay. This results in an overall energy saving on the whole system, which extends the battery life of all components. In one or more embodiments, the positioning means comprise an extendable rod with means for locking the extendable rod for a specified length; the extensible stand further comprising means disposed at both ends for connection to the side wall of a well. In one or more embodiments, the transmission unit is configured to transmit at a wavelength and frequency that cannot penetrate the water when the transmitter is located under water, such as under 10-100 cm of water. In one or more embodiments, the transmission unit is configured to transmit at a wavelength and frequency at least partially absorbed in water or water comprising conductive impurities such as salts and wherein the wireless repeater and / or receiver unit is configured to measure the time interval between received monitoring data signals. The time interval will give an indirect indication of whether the well or shaft has been flooded. In the event of flooding, the signal cannot pass through the water or contaminated water as it leads poorly and can further reflect the signal. In one or more embodiments, the wireless repeater or wireless relay and / or receiver unit is configured to log an alarm and / or create and transmit an alarm signal when the time interval between received monitoring data signals exceeds a predetermined threshold. This is important as a time interval exceeding e.g. 20 minutes is an indication that the sewer is blocked, which will cause the sewer water to rise and escape from the sewer system through any possible opening, such as e.g. into a basement of a house.

Transmissionssystemet er særligt brugbart til gnaverfælder (især rottefælder), da der ikke er noget tilgængeligt system til kontinuerlig trådløs kommunikation med en fælde, som er monteret i et brønd- og kloaksystem. Kabler er af indlysende grunde ikke egnede til at blive trukket gennem brøndåbningen og over en vej; og rotterne vil gnave i kablerne. Derfor er nogle fælder forbundet via kabler til en kontrolboks, som er placeret lige under brønddækslet. Kontrolboksen omfatter et GSM-modul, som er konfigureret til at transmittere overvågningsdata. Men denne opsætning giver ikke nogen stabil kommunikation til en modtager, da GSM-signalet blokeres af dækslet og det omgivende jordlag rundt om brønden. I en eller flere udførelsesformer, er overvågningsudstyret indlejret i en rottefælde. Et sådan udstyr kan overvåge at fælden udløses eller tilstedeværelsen af en rotte i eller tæt på fælden. Hvis aflivningsmidlerne i fælden udløses ved hjælp af en trykgas, såsom carbondioxid, kan overvågningsudstyret være en stødsensor, såsom en G-sensor. I en eller flere udførelsesformer, er transmissionsenheden indlejret i en rottefælde. Med denne configuration, undgås eksterne kabler. I en eller flere udførelsesformer, er modtagerenheden konfigureret til at transmittere de modtagne overvågningsdata og potentielle alarmsignaler til en server på et netværkssted. Denne konfiguration vil gøre det muligt at have en kontinuerlig forbindelse med overvågningsudstyret. Signalet kan transmitteres via f.eks. satellit, 4G, 3G, 5G, radio link, GSM, LTE, og/eller UMTS. I en eller flere udførelsesformer, omfatter overvågningsdataene information om aktiviteten for en rottefældes aflivningsmidler. I en eller flere udførelsesformer, omfatter overvågningsdataene information om tilstedeværelsen af rotter i kloakken, brønden eller skakten. I en eller flere udførelsesformer, er den trådløse repeater og/eller det trådløse relæ og/eller transmissionsenheden og/eller modtagerenheden konfigureret til at udsende et ON/OFF-synkroniseringssignal. Synkronisering af de forskellige enheder reducerer energiforbruget, og batterierne i de forskellige enheder vil holde længere. Dette er vigtigt, da servicefrekvensen for de forskellige enheder derved også er reduceret. I en eller flere udførelsesformer, er den trådløse repeater og/eller det trådløse relæ konfigureret til at ON/OFF-synkronisere med transmissionsenheden. I en eller flere udførelsesformer, er transmissionsenheden konfigureret til at ON/OFF-synkronisere med den trådløse repeater og/eller det trådløse relæ, eller vice versa. I en eller flere udførelsesformer, er modtagerenheden konfigureret til at ON/OFF-synkronisere med den trådløse repeater og/eller det trådløse relæ, eller vice versa. I en eller flere udførelsesformer, er den trådløse repeater og/eller det trådløse relæ konfigureret til at ON/OFF-synkronisere med transmissionsenheden; og modtagerenheden er konfigureret til at ON/OFF-synkronisere med den trådløse repeater og/eller det trådløse relæ. I en eller flere udførelsesformer, er den trådløse repeater og/eller det trådløse relæ konfigureret til at ON/OFF-synkronisere med transmissionsenheden, eller vice versa; og modtagerenheden er konfigureret til at ON/OFF-synkronisere med den trådløse repeater og/eller det trådløse relæ, eller vice versa.The transmission system is particularly useful for rodent traps (especially rat traps), as there is no available continuous wireless communication system with a trap mounted in a well and sewer system. Cables, for obvious reasons, are not suitable for being pulled through the well opening and over a road; and the rats will gnaw at the cables. Therefore, some traps are connected via cables to a control box located just below the well cover. The control box includes a GSM module configured to transmit monitoring data. However, this setup does not provide stable communication to a receiver as the GSM signal is blocked by the cover and the surrounding soil layer around the well. In one or more embodiments, the monitoring equipment is embedded in a rat trap. Such equipment can monitor the release of the trap or the presence of a rat in or near the trap. If the killing agents in the trap are triggered by a pressure gas such as carbon dioxide, the monitoring equipment may be a shock sensor such as a G sensor. In one or more embodiments, the transmission unit is embedded in a rat trap. With this configuration, external cables are avoided. In one or more embodiments, the receiver unit is configured to transmit the received monitoring data and potential alarm signals to a server at a network location. This configuration will allow a continuous connection to the monitoring equipment. The signal can be transmitted via e.g. satellite, 4G, 3G, 5G, radio link, GSM, LTE, and / or UMTS. In one or more embodiments, the monitoring data includes information on the activity of a rat trap's killing agents. In one or more embodiments, the monitoring data includes information on the presence of rats in the sewer, well or shaft. In one or more embodiments, the wireless repeater and / or wireless relay and / or transmission unit and / or receiver unit are configured to output an ON / OFF synchronization signal. Synchronizing the various devices reduces energy consumption and the batteries in the different devices will last longer. This is important as the service frequency of the various units is thereby also reduced. In one or more embodiments, the wireless repeater and / or wireless relay is configured to ON / OFF synchronize with the transmission unit. In one or more embodiments, the transmission unit is configured to ON / OFF synchronize with the wireless repeater and / or wireless relay, or vice versa. In one or more embodiments, the receiver unit is configured to ON / OFF synchronize with the wireless repeater and / or wireless relay, or vice versa. In one or more embodiments, the wireless repeater and / or wireless relay is configured to ON / OFF synchronize with the transmission unit; and the receiver unit is configured to synchronize ON / OFF with the wireless repeater and / or wireless relay. In one or more embodiments, the wireless repeater and / or wireless relay is configured to ON / OFF synchronize with the transmission unit, or vice versa; and the receiver unit is configured to ON / OFF synchronize with the wireless repeater and / or wireless relay, or vice versa.

Det skal bemærkes at udførelsesformer og funktioner der er beskrevet i konteksten af et af aspekterne af nærværende frembringelse også gælder for de andre aspekter af frembringelsen.It should be noted that embodiments and functions described in the context of one of the aspects of this invention also apply to the other aspects of the invention.

Kort beskrivelse af figurerneBrief description of the figures

Figur 1 viser et transmissionssystem ifølge forskellige udførelsesformer af frembringelsen; ogFigure 1 shows a transmission system according to various embodiments of the production; and

Figur 2 viser placeringsmidlerne ifølge forskellige udførelsesformer af frembringelsen.Figure 2 shows the positioning means according to various embodiments of the invention.

Detaljeret beskrivelse af frembringelsenDetailed description of the production

Der henvises til Figur 1, som viser en generel oversigt over frembringelsen. Figur 1 viser et transmissionssystem til overvågningsudstyr 10, som er indlejret i en rottefælde 30. Transmissionssystemet omfatter en transmissionsenhed 100, en trådløs repeater eller et trådløst relæ 200, placeringsmidler 300 og en modtagerenhed 400. Transmissionsenhed 100 er konfigureret til at tage imod overvågningsdata fra et overvågningsudstyr 10, som er indlejret i en rottefælde 30, og til at transmittere overvågningsdataene. Den trådløse repeater eller det trådløse relæ 200 er konfigureret til at tage imod overvågningsdataene fra overvågningsudstyret 10. Placeringsmidlerne 300 er tilpasset til at placere den trådløse repeater eller det trådløse relæ 200 på et sted under brønddækslet 20, fortrinsvis 5-100 cm under brønddækslet 20. Modtagerenheden 400 er tilpasset til at blive placeret i en afstand af 0-100 meter fra brønd- eller skaktdækslet 20, og er konfigureret til at modtage et overvågningsdatasignal fra et overvågningsudstyr 10, som gentages af den trådløse repeater og/eller det trådløse relæ 200. Modtagerenheden 400 er også konfigureret til at transmittere de modtagne overvågningsdata til en server 500 på et netværkssted.Refer to Figure 1, which shows a general overview of production. Figure 1 shows a transmission system for monitoring equipment 10 embedded in a rat trap 30. The transmission system comprises a transmission unit 100, a wireless repeater or a wireless relay 200, placement means 300 and a receiver unit 400. Transmission unit 100 is configured to receive monitoring data from a monitoring equipment 10 embedded in a rat trap 30, and for transmitting the monitoring data. The wireless repeater or wireless relay 200 is configured to receive the monitoring data from the monitoring equipment 10. The location means 300 are adapted to place the wireless repeater or wireless relay 200 at a location below the well cover 20, preferably 5-100 cm below the well cover 20. The receiver unit 400 is adapted to be located at a distance of 0-100 meters from the well or shaft cover 20, and is configured to receive a monitoring data signal from a monitoring equipment 10 which is repeated by the wireless repeater and / or the wireless relay 200. The receiver unit 400 is also configured to transmit the received monitoring data to a server 500 at a network location.

Figur 2 viser placeringsmidlerne 300 ifølge forskellige udførelsesformer af frembringelsen. Placeringsmidlerne 300 omfatter en forlængelig stang 310 med midler til at fastlåse den forlængelige stang 310 i en bestemt længde. Desuden er der anbragt midler 312 i begge ender af den forlængelige stang 310 til tilkobling på sidevæggen i en brønd. Placeringsmidlerne 300 er også tilpasset som ankermidler til at forankre rottefælden 30 med en wire 32 (Figur 1).Figure 2 shows the positioning means 300 according to different embodiments of the invention. The positioning means 300 comprise an extendable rod 310 with means for locking the extendable rod 310 for a specified length. In addition, means 312 are provided at both ends of the extendable bar 310 for connection to the side wall of a well. The positioning means 300 are also adapted as anchor means for anchoring the rat trap 30 with a wire 32 (Figure 1).

Referencer 10 Overvågningsudstyr 20 Brønddæksel 30 Rottefælde 32 Wire 40 Brønd 50 Kloak 100 Transmissionsenhed 200 Trådløs repeater eller trådløst relæ 300 Placeringsmidler 310 Forlængeligstang 312 Midler til tilkobling på sidevæggen i en brønd eller skakt 400 Modtagerenhed 500 ServerReferences 10 Monitoring Equipment 20 Well Cover 30 Rat Trap 32 Wire 40 Well 50 Sewer 100 Transmission Unit 200 Wireless Repeater or Wireless Relay 300 Placement Means 310 Extensible Rod 312 Means for Side Wall Connection in a Well or Shaft 400 Receiver Unit 500 Server

Claims

Utility model force v

A wireless transmission system for monitoring equipment in rat traps located in sewers, shafts and wells comprising: - a transmission unit (100) embedded in a rat trap (30) and configured to receive monitoring data from a monitoring equipment ( 10) embedded in the rat trap and for transmitting the received monitoring data; - a wireless repeater or wireless relay (200) configured to receive the monitoring data of a monitoring equipment (10); and - a receiver unit (400) adapted to be located at a distance of 0-100 meters from the well or shaft cover (20), and configured to receive a monitoring data signal from a monitoring equipment (10) repeated by the wireless repeater and / or the wireless relay (200), which is new in that the wireless tramission system further comprises positioning means (300) adapted to place the wireless repeater or wireless relay (200) 5-100 cm below the well. or the shaft cover (20).

The transmission system of claim 1, wherein the positioning means (300) comprise an extendable rod (310) with means for locking the extendable rod for a specified length; the extendable bar further comprising means (312) disposed at both ends for connection to the sidewall of a well or shaft.

A transmission system according to any one of claims 1-2, wherein the transmission unit (100) is configured to transmit at a wavelength and frequency that a) is at least partially absorbed or reflected in water and / or b) is at least partially absorbed or reflected in water comprising conductive impurities and / or c) which cannot pass through 10-100 cm of water or water containing conductive impurities; and wherein the wireless repeater or wireless relay (200) and / or receiver unit (400) is configured to measure the time interval between received monitoring data signals.

The transmission system of claim 3; wherein the wireless repeater or wireless relay (200) and / or receiver unit (400) is configured to log an alarm and / or create and transmit an alarm signal when the time interval between received monitoring data signals exceeds a predetermined threshold.

Transmission system according to any one of claims 1-4, wherein the receiver unit (400) is configured to transmit the received monitoring data and potential alarm signals to a server (500) at a network location.

Transmission system according to any of claims 1-5, wherein the wireless repeater (200) and / or the wireless relay (200) and / or the transmission unit (100) and / or the receiver unit (400) are configured to transmit a ON / OFF synchronization signal.

Transmission system according to any one of claims 1-6, wherein the transmission unit (100) is configured to ON / OFF synchronize with the wireless repeater (200) and / or the wireless relay (200), or vice versa.

Transmission system according to any one of claims 1-7, wherein the wireless repeater (200) and / or the wireless relay (200) are configured to ON / OFF synchronize with the transmission unit (100), or vice versa; and the receiver unit (400) is configured to synchronize ON / OFF with the wireless repeater (200) and / or the wireless relay (200), or vice versa.