h many animal experiments, it's very common to transform the signals into positive / negative saturation anesthetize the animals for a long time. However, the voltage signals appearing by turns, and output them to the experimenters' carelessness may lead to the deaths of the buzzer. In this way, breath of anesthetized animals can be experimented animals because of suffocation. Especially for transformed into sound monitoring, and the output can also those animals of important species or being long-ten serve as an important physiological parameter. The system experimented and observed, their deaths may cause losses. In block diagram is illustrated as Fig. 1. this paper, a simplified on line monitoring system is presented to transduce the breathmg air temperature, which is warmer when exhaling and cooler when inhaling into corresponding Generally speaking, this device had measured the respiration sound. This will let the experimenter not to give extra look rate per minute of human, pigs, goats, rabbits, chicken, duck attentively at breath monitoring, and can simultaneously were 17, 16, 15, 30, 18, 22 generally. And, if the breath of measure the physiological parameters of breathing frequency Lanyu pig was stops, fmt aid should be given withiin 30 per minute. Besides, if the anesthetized animal stops breathing, seconds. The purpose of the simple breath monitoring system the positive / negative saturation signals on OP-AMF' in our is to avoid the accidental death of the anesthetized system will let an adjustable timer send out a second kind of experimental animals, and enhance the safety in experiments. emergency alarm which is initiated when the breath interval In addition, the output breathing fieqnency per minute can exceeds the safe length, so that first aid can be given in time. also serve as an important physiological parameter of the In this way, the safety of animal experiments can be animal. Moreover, the following hvo functions can be added enhanced.to the system with single-chip 89C51 devices. First, a feed back circuit was designed to measure the maximum and Keyword% Temperature-sensitve, breath, anesthetized. minimum temperature of every animal's breathing air and take the average value. Second, the breathing frequency per minute can be displayed with LCD. It may well be applied to Respiration rate, heart rate and body temperature, are the vital the breath monitoring system for babies, so as to decrease the signs of the animal. By evaluating the animal's vital signs and accidental deaths of babies. It may also be applied on the health problems can be identified in their early stages. This radio system to monitor the breathing parameters of flying allows for early treatment, which usually prevents serious birds and sportinger. losses. Breathimg ventilates the lungs and is the alternation of inhalation and exhalation. When animals exhale, the outgoing
In. RESULT AND DISCUSSION
L INTRODUCTIONair is warmer than the inhaled air. If temperature difference between the inhaled air and the exhaled air at the nasa...
