EP0518437B1 - Dispositif d'alarme de parturition pour animaux d'élevage - Google Patents

Dispositif d'alarme de parturition pour animaux d'élevage Download PDF

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Publication number
EP0518437B1
EP0518437B1 EP19920201671 EP92201671A EP0518437B1 EP 0518437 B1 EP0518437 B1 EP 0518437B1 EP 19920201671 EP19920201671 EP 19920201671 EP 92201671 A EP92201671 A EP 92201671A EP 0518437 B1 EP0518437 B1 EP 0518437B1
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EP
European Patent Office
Prior art keywords
alarm
birth
signal
girth
animal
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP19920201671
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German (de)
English (en)
Other versions
EP0518437A1 (fr
Inventor
Marcus Cornelis Kuno Bleijenberg
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
HANDELSONDERNEMING VELDMAN 1 DIJKSTRA B.V.
Original Assignee
Bleijenberg Marcus C K
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Application filed by Bleijenberg Marcus C K filed Critical Bleijenberg Marcus C K
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    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61D—VETERINARY INSTRUMENTS, IMPLEMENTS, TOOLS, OR METHODS
    • A61D17/00—Devices for indicating trouble during labour of animals ; Methods or instruments for detecting pregnancy-related states of animals
    • A61D17/008—Devices for indicating trouble during labour of animals ; Methods or instruments for detecting pregnancy-related states of animals for detecting birth of animals, e.g. parturition alarm

Definitions

  • This invention relates to a wireless birth alarm for livestock, such as mares, cows or ewes, comprising position sensing and signal emitting means to be secured to the animal, which means close a contact and emit a signal when the animal takes up a position that may be characteristic of the onset of parturition for that animal, as well as a signal receiver comprising a circuit which, upon receiving an uninterrupted signal, after a settable threshold interval has elapsed, can activate an alarm.
  • the invention is based on the principle that in the case of a contraction a lying sleeping animal after the contraction partly raises herself. In horses, a contraction lasts less than 90 seconds and the birth alarm thus signals the occurrence of contractions.
  • the receiver can be set in a position which signals as soon as the animal lies down. If it turns out the lying position is not connected with the onset of labour, the circuit can be switched to the position that signals contractions.
  • the position sensing and signal emitting means can be automatically deactivated after elapse of a settable transmission time of for instance 3 minutes and, after a temporary interruption of contact in the sensing means, when the contact is closed again, be reactivated after a very short lapse of time of the order of one second.
  • the position sensing and signal emitting means comprising liquid switches such as mercury switches, can be embedded and be confined in a protective casing which can be attached between the withers of a horse by coupling it to the projecting bracket of an anti-roll girth positioned behind the forelegs of a horse.
  • the position sensing and signal emitting means can be attached behind the head of the sheep through coupling to the buckle of a girth positioned behind the forelegs of a sheep, this girth being fitted with a girth plate provided with Velcro at the underside thereof for adherence to the fleece.
  • the position of the back is characteristic inasmuch as during parturition, as well as during urination, the back is curved, while normally it is straight and horizontal.
  • the liquid switches which are mounted on the withers of the cow via an anti-roll girth and can signal a lying (parturient) position, a switch that signals longitudinal curving of the back, the cow's taking up a position indicative of either calving or urination is signalled.
  • the position sensing and signal emitting means comprising liquid switches, such as mercury switches, which signal the cow's taking up a lying position and further comprising a switch which signals the curving of the back in longitudinal direction, can be embedded and be confined in a protective casing which can be attached to the withers of the cow by coupling it to the buckle of a girth.
  • a tail strap which can be positioned around the tail and which on the back splits into two parts which are secured laterally to the girth.
  • the lateral parts of the tail strap pull the lateral parts of the girth rearwardly, so that the change of inclination when the back is curved is further enhanced and the longitudinal switch can function more reliably.
  • the operation of the birth alarm is as follows.
  • the meridian line (Fig. 5, no. 1) through the body of a mare, cow or ewe that is standing up, lying normally or walking, makes an angle of 90° (Fig. 5) to about 65° (Fig. 7) relative to the ground.
  • the angle of a mother animal in labour is from about 2° (Fig. 6) to about 40° relative to the ground, depending on the animal species.
  • two mercury switches are attached to the back of the mother animal in such a manner that they make contact to the right or to the left at an angle that is characteristic for the animal species in question, such contact can be passed on as a signal to the receiver via a transmitter.
  • Position I is for mother animals (i.e. 90% of the mother animals) who, before parturition, tend not to rest or sleep in stretched position, i.e., at an angle smaller than 40°.
  • the receiver receives signals from the transmitter, the alarm will not be set off until a so-called threshold interval, characteristic of the animal species in question, has elapsed. This prevents the occurrence of false alarm as a result of running or rolling motions of the mother animal.
  • position II of the receiver when the alarm is actuated by a mother animal resting or sleeping in stretched position, position II of the receiver must be switched on by means of a knob.
  • the transmitter is so designed that, for instance in the case of mares resting in stretched position, it does not transmit for a period longer than about three minutes.
  • a circuit provides that the transmitter then switches off automatically but remains standby without appreciable power consumption.
  • the contact is broken, i.e., when the mother animal rises again, the transmitter will reset in about one second and again be capable of transmitting continuously for three minutes, if necessary.
  • the receiver in position II operates as follows. When a horizontally resting mother animal wakes up and contractions start, the transmitter will reset because the mother animal raises herself between contractions and the mercury contact will be broken.
  • the receiver has been set in such a manner that it only sets off the alarm if it receives a signal for a period of time longer than the animal-specific threshold interval and this signal is interrupted for a minimum time span, for instance one second. This interruption, however, must occur before a predetermined maximum interval, for instance of 90 seconds, has elapsed. If the receiver receives a signal continuously for a period longer than the predetermined interval (for instance 90 seconds), the alarm is not set off and the receiver regards the signal as coming from a horizontally resting animal.
  • Figs 8 and 9 show a cow having a straight and a curved back, respectively.
  • the transmitter 3 comprises, in addition to the two transversely slanting mercury switches sensing the lying positions of the cow, a third mercury switch which is arranged in the longitudinal direction and which accordingly measures the changes in the inclination of the back. This last-mentioned switch, therefore, senses a change in position indicative of either calving or urination.
  • the average urination time of a cow is of the order of 14 seconds and therefore a corresponding threshold interval must be set in the receiver so as to prevent false alarm.
  • Figs 8 and 9 further show a tail strap 5 which splits into two lateral parts 5a connecting laterally to the girth 2.

Landscapes

  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Veterinary Medicine (AREA)
  • Biophysics (AREA)
  • Pregnancy & Childbirth (AREA)
  • Engineering & Computer Science (AREA)
  • Animal Husbandry (AREA)
  • Wood Science & Technology (AREA)
  • Zoology (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Housing For Livestock And Birds (AREA)
  • Emergency Alarm Devices (AREA)
  • Catching Or Destruction (AREA)

Claims (7)

  1. Dispositif d'alarme de parturition sans fil pour bétail, tel que des juments, des vaches ou des brebis, comprenant des moyens de détection de position et d'émission de signal qui sont à fixer sur l'animal, lesquels moyens ferment un contact et émettent un signal lorsque l'animal prend une position qui peut être caractéristique du début de la parturition de cet animal, ainsi qu'un récepteur de signal comprenant un circuit qui, sur réception d'un signal ininterrompu, après qu'un intervalle de temps de seuil réglable s'est écoulé, peut activer un dispositif d'alarme, caractérisé en ce qu'au niveau du récepteur, le circuit peut être réglé dans une position où l'alarme est seulement activée si le signal reçu en continu est interrompu pendant un intervalle de temps dont la durée est fonction des espèces d'animaux, lequel intervalle de temps se produit après que l'intervalle de temps de seuil s'est écoulé et avant l'écoulement d'un second intervalle de temps dont la durée est également fonction de l'espèce d'animal, avec ensuite une remise à l'état initial.
  2. Dispositif d'alarme de parturition selon la revendication 1, caractérisé en ce que pour les juments qui tendent à dormir couchées, ledit intervalle de temps d'interruption est de 6 à 120 secondes.
  3. Dispositif d'alarme de parturition selon la revendication 1 ou 2, caractérisé en ce que les moyens de détection de position et d'émission de signal sont automatiquement désactivés après un temps d'émission réglable de par exemple 3 minutes et, après une rupture temporaire du contact dans le moyen de détection, lorsque le contact est de nouveau fermé, ces moyens sont réactivés après un très court intervalle de temps de l'ordre de 1 seconde.
  4. Dispositif d'alarme de parturition selon l'une quelconque des revendications précédentes, caractérisé en ce que, avec les juments, les moyens de détection de position et d'émission de signal, qui comprennent des contacts à liquide, tels que des contacts à mercure, sont incorporés et sont enfermés dans un boîtier protecteur, lequel boîtier peut être fixé entre le garrot d'une jument par le raccordement à la bride en saillie d'une sangle anti-roulis qui est positionnée derrière les jambes antérieures de la jument.
  5. Dispositif d'alarme de parturition selon l'une quelconque des revendications 1 à 3, caractérisé en ce que, avec les brebis, les moyens de détection de position et d'émission de signal, qui comprennent des contacts à liquide, tels que des contacts à mercure, sont incorporés et sont enfermés dans un boîtier protecteur, lequel boîtier peut être fixé derrière la tête d'une brebis par le raccordement à la boucle d'une sangle qui est positionnée derrière les pattes antérieures de la brebis, ladite sangle comprenant une plaque de sangle avec une bande Velcro pour l'adhérence à la toison.
  6. Dispositif d'alarme de parturition selon l'une quelconque des revendications 1 à 3, caractérisé en ce que, avec les vaches tendant à mettre bas en position debout, les moyens de détection de position et d'émission de signal, qui comprennent des contacts à liquide, tels que des contacts à mercure, signalant que la vache prend une position couchée et comprenant de plus un interrupteur signalant la courbure du dos selon une direction longitudinale, sont incorporés et sont enfermés dans un boîtier protecteur, lequel boîtier peut être fixé au garrot de la vache par le raccordement à la boucle d'une sangle.
  7. Dispositif d'alarme de parturition selon la revendication 6, caractérisé par une courroie de queue, qui peut être placée autour de la queue et qui sur le dos se sépare en deux parties qui sont latéralement fixées à la sangle.
EP19920201671 1991-06-10 1992-06-09 Dispositif d'alarme de parturition pour animaux d'élevage Expired - Lifetime EP0518437B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
NL9100994 1991-06-10
NL9100994A NL9100994A (nl) 1991-06-10 1991-06-10 Draadloze geboortemelder voor vee.

Publications (2)

Publication Number Publication Date
EP0518437A1 EP0518437A1 (fr) 1992-12-16
EP0518437B1 true EP0518437B1 (fr) 1994-09-14

Family

ID=19859348

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19920201671 Expired - Lifetime EP0518437B1 (fr) 1991-06-10 1992-06-09 Dispositif d'alarme de parturition pour animaux d'élevage

Country Status (3)

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EP (1) EP0518437B1 (fr)
DE (1) DE69200408T2 (fr)
NL (1) NL9100994A (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR3006577B1 (fr) * 2013-06-07 2015-07-03 Yvon Chaume Systeme de detection de saillie et de parturition

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4055839A (en) * 1975-07-25 1977-10-25 Locust Farms, Inc. Foaling alarm
EP0060855A1 (fr) 1980-09-24 1982-09-29 PARK, John Robert Systeme d'alarme
GB8814572D0 (en) * 1988-06-18 1988-07-27 Carr N Electronic foaling alarm
NL9000528A (nl) 1990-03-07 1991-10-01 Marcus Cornelis Kuno Bleijenbe Geboortemelder voor vee.

Also Published As

Publication number Publication date
EP0518437A1 (fr) 1992-12-16
DE69200408D1 (de) 1994-10-20
NL9100994A (nl) 1993-01-04
DE69200408T2 (de) 1995-02-16

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